2010-04-29 14:14:44 +02:00
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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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2013-02-05 17:06:20 +01:00
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#include "hw/virtio/virtio.h"
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#include "hw/i386/pc.h"
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2012-12-17 18:20:00 +01:00
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#include "qemu/sockets.h"
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2010-04-29 14:14:44 +02:00
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#include "virtio-9p.h"
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#include "fsdev/qemu-fsdev.h"
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2010-10-18 11:58:16 +02:00
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#include "virtio-9p-xattr.h"
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2011-05-18 23:18:05 +02:00
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#include "virtio-9p-coth.h"
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2011-10-12 15:41:25 +02:00
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#include "trace.h"
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2012-12-17 18:19:50 +01:00
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#include "migration/migration.h"
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2010-04-29 14:14:44 +02:00
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2011-05-18 12:10:57 +02:00
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int open_fd_hw;
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int total_open_fd;
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static int open_fd_rc;
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2010-04-29 14:14:44 +02:00
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2010-06-01 22:30:51 +02:00
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enum {
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Oread = 0x00,
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Owrite = 0x01,
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Ordwr = 0x02,
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Oexec = 0x03,
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Oexcl = 0x04,
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Otrunc = 0x10,
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Orexec = 0x20,
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Orclose = 0x40,
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Oappend = 0x80,
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};
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static int omode_to_uflags(int8_t mode)
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{
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int ret = 0;
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switch (mode & 3) {
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case Oread:
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ret = O_RDONLY;
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break;
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case Ordwr:
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ret = O_RDWR;
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break;
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case Owrite:
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ret = O_WRONLY;
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break;
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case Oexec:
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ret = O_RDONLY;
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break;
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}
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if (mode & Otrunc) {
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ret |= O_TRUNC;
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}
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if (mode & Oappend) {
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ret |= O_APPEND;
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}
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if (mode & Oexcl) {
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ret |= O_EXCL;
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}
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return ret;
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}
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2011-10-12 15:41:24 +02:00
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struct dotl_openflag_map {
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int dotl_flag;
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int open_flag;
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};
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static int dotl_to_open_flags(int flags)
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{
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int i;
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/*
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* We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
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* and P9_DOTL_NOACCESS
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*/
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int oflags = flags & O_ACCMODE;
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struct dotl_openflag_map dotl_oflag_map[] = {
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{ P9_DOTL_CREATE, O_CREAT },
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{ P9_DOTL_EXCL, O_EXCL },
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{ P9_DOTL_NOCTTY , O_NOCTTY },
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{ P9_DOTL_TRUNC, O_TRUNC },
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{ P9_DOTL_APPEND, O_APPEND },
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{ P9_DOTL_NONBLOCK, O_NONBLOCK } ,
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{ P9_DOTL_DSYNC, O_DSYNC },
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{ P9_DOTL_FASYNC, FASYNC },
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{ P9_DOTL_DIRECT, O_DIRECT },
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{ P9_DOTL_LARGEFILE, O_LARGEFILE },
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{ P9_DOTL_DIRECTORY, O_DIRECTORY },
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{ P9_DOTL_NOFOLLOW, O_NOFOLLOW },
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{ P9_DOTL_NOATIME, O_NOATIME },
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{ P9_DOTL_SYNC, O_SYNC },
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};
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for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
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if (flags & dotl_oflag_map[i].dotl_flag) {
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oflags |= dotl_oflag_map[i].open_flag;
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}
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}
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return oflags;
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}
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2010-06-14 22:34:41 +02:00
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void cred_init(FsCred *credp)
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2010-04-29 14:14:47 +02:00
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{
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2010-06-14 22:34:41 +02:00
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credp->fc_uid = -1;
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credp->fc_gid = -1;
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credp->fc_mode = -1;
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credp->fc_rdev = -1;
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2010-04-29 14:14:47 +02:00
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}
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2011-10-12 15:41:23 +02:00
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static int get_dotl_openflags(V9fsState *s, int oflags)
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{
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int flags;
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/*
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* Filter the client open flags
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*/
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2011-10-12 15:41:24 +02:00
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flags = dotl_to_open_flags(oflags);
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flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
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2011-10-12 15:41:23 +02:00
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/*
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* Ignore direct disk access hint until the server supports it.
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*/
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flags &= ~O_DIRECT;
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return flags;
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}
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2011-09-09 11:44:18 +02:00
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void v9fs_path_init(V9fsPath *path)
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{
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path->data = NULL;
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path->size = 0;
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}
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void v9fs_path_free(V9fsPath *path)
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{
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g_free(path->data);
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path->data = NULL;
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path->size = 0;
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}
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void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs)
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{
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v9fs_path_free(lhs);
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lhs->data = g_malloc(rhs->size);
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memcpy(lhs->data, rhs->data, rhs->size);
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lhs->size = rhs->size;
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}
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int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
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const char *name, V9fsPath *path)
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{
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int err;
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err = s->ops->name_to_path(&s->ctx, dirpath, name, path);
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if (err < 0) {
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err = -errno;
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}
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return err;
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}
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2011-06-01 09:05:11 +02:00
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/*
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* Return TRUE if s1 is an ancestor of s2.
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*
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* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
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* As a special case, We treat s1 as ancestor of s2 if they are same!
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*/
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2011-09-09 11:44:18 +02:00
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static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2)
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2011-06-01 09:05:11 +02:00
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{
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2011-09-09 11:44:18 +02:00
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if (!strncmp(s1->data, s2->data, s1->size - 1)) {
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if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') {
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2011-06-01 09:05:11 +02:00
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return 1;
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}
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}
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return 0;
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}
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2010-04-29 14:14:46 +02:00
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static size_t v9fs_string_size(V9fsString *str)
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{
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return str->size;
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}
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2011-08-02 08:06:24 +02:00
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/*
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* returns 0 if fid got re-opened, 1 if not, < 0 on error */
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2011-08-02 08:06:17 +02:00
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static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f)
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2011-08-02 08:06:24 +02:00
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{
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int err = 1;
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if (f->fid_type == P9_FID_FILE) {
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if (f->fs.fd == -1) {
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do {
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2011-08-02 08:06:17 +02:00
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err = v9fs_co_open(pdu, f, f->open_flags);
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} while (err == -EINTR && !pdu->cancelled);
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2011-08-02 08:06:24 +02:00
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}
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} else if (f->fid_type == P9_FID_DIR) {
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if (f->fs.dir == NULL) {
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do {
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2011-08-02 08:06:17 +02:00
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err = v9fs_co_opendir(pdu, f);
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} while (err == -EINTR && !pdu->cancelled);
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2011-08-02 08:06:24 +02:00
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}
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}
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return err;
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}
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2011-08-02 08:06:17 +02:00
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static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid)
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2010-04-29 14:14:48 +02:00
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{
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2011-05-18 12:10:57 +02:00
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int err;
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2010-04-29 14:14:48 +02:00
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V9fsFidState *f;
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2011-08-02 08:06:17 +02:00
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V9fsState *s = pdu->s;
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2010-04-29 14:14:48 +02:00
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for (f = s->fid_list; f; f = f->next) {
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2011-05-18 14:08:07 +02:00
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BUG_ON(f->clunked);
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2010-04-29 14:14:48 +02:00
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if (f->fid == fid) {
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2011-05-18 12:10:57 +02:00
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/*
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* Update the fid ref upfront so that
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* we don't get reclaimed when we yield
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* in open later.
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*/
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2011-05-18 14:08:07 +02:00
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f->ref++;
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2011-05-18 12:10:57 +02:00
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/*
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* check whether we need to reopen the
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* file. We might have closed the fd
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* while trying to free up some file
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* descriptors.
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*/
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2011-08-02 08:06:17 +02:00
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err = v9fs_reopen_fid(pdu, f);
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2011-08-02 08:06:24 +02:00
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if (err < 0) {
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f->ref--;
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return NULL;
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}
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2011-05-18 12:10:57 +02:00
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/*
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* Mark the fid as referenced so that the LRU
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* reclaim won't close the file descriptor
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*/
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f->flags |= FID_REFERENCED;
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2010-04-29 14:14:48 +02:00
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return f;
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}
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}
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return NULL;
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}
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static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
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{
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V9fsFidState *f;
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2011-05-18 14:08:07 +02:00
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for (f = s->fid_list; f; f = f->next) {
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/* If fid is already there return NULL */
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BUG_ON(f->clunked);
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if (f->fid == fid) {
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return NULL;
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}
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2010-04-29 14:14:48 +02:00
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}
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2011-08-21 05:09:37 +02:00
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f = g_malloc0(sizeof(V9fsFidState));
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2010-04-29 14:14:48 +02:00
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f->fid = fid;
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2010-09-02 07:39:06 +02:00
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f->fid_type = P9_FID_NONE;
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2011-05-18 14:08:07 +02:00
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f->ref = 1;
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2011-05-18 12:10:57 +02:00
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/*
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* Mark the fid as referenced so that the LRU
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* reclaim won't close the file descriptor
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*/
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f->flags |= FID_REFERENCED;
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2010-04-29 14:14:48 +02:00
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f->next = s->fid_list;
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s->fid_list = f;
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return f;
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}
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2011-08-02 08:06:17 +02:00
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static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp)
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2010-09-02 07:39:07 +02:00
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{
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int retval = 0;
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if (fidp->fs.xattr.copied_len == -1) {
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/* getxattr/listxattr fid */
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goto free_value;
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}
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/*
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* if this is fid for setxattr. clunk should
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* result in setxattr localcall
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*/
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if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
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/* clunk after partial write */
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retval = -EINVAL;
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goto free_out;
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}
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2010-08-26 07:45:23 +02:00
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if (fidp->fs.xattr.len) {
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2011-08-02 08:06:17 +02:00
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retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name,
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2010-08-26 07:45:23 +02:00
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fidp->fs.xattr.value,
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fidp->fs.xattr.len,
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fidp->fs.xattr.flags);
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} else {
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2011-08-02 08:06:17 +02:00
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retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name);
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2010-08-26 07:45:23 +02:00
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}
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2010-09-02 07:39:07 +02:00
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free_out:
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v9fs_string_free(&fidp->fs.xattr.name);
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free_value:
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if (fidp->fs.xattr.value) {
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2011-08-21 05:09:37 +02:00
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g_free(fidp->fs.xattr.value);
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2010-09-02 07:39:07 +02:00
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}
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return retval;
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}
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|
|
|
|
2011-08-02 08:06:17 +02:00
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static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp)
|
2010-04-29 14:14:48 +02:00
|
|
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{
|
2010-09-02 07:39:07 +02:00
|
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int retval = 0;
|
2011-05-18 14:08:07 +02:00
|
|
|
|
|
|
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if (fidp->fid_type == P9_FID_FILE) {
|
2011-05-18 12:10:57 +02:00
|
|
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/* If we reclaimed the fd no need to close */
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|
|
|
if (fidp->fs.fd != -1) {
|
2011-10-25 08:40:40 +02:00
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retval = v9fs_co_close(pdu, &fidp->fs);
|
2011-05-18 12:10:57 +02:00
|
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}
|
2011-05-18 14:08:07 +02:00
|
|
|
} else if (fidp->fid_type == P9_FID_DIR) {
|
2011-05-18 13:38:34 +02:00
|
|
|
if (fidp->fs.dir != NULL) {
|
2011-10-25 08:40:40 +02:00
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retval = v9fs_co_closedir(pdu, &fidp->fs);
|
2011-05-18 13:38:34 +02:00
|
|
|
}
|
2011-05-18 14:08:07 +02:00
|
|
|
} else if (fidp->fid_type == P9_FID_XATTR) {
|
2011-08-02 08:06:17 +02:00
|
|
|
retval = v9fs_xattr_fid_clunk(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
}
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&fidp->path);
|
2011-05-18 14:08:07 +02:00
|
|
|
g_free(fidp);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2013-02-05 06:57:46 +01:00
|
|
|
static int put_fid(V9fsPDU *pdu, V9fsFidState *fidp)
|
2011-05-18 14:08:07 +02:00
|
|
|
{
|
|
|
|
BUG_ON(!fidp->ref);
|
|
|
|
fidp->ref--;
|
2011-05-18 12:10:57 +02:00
|
|
|
/*
|
|
|
|
* Don't free the fid if it is in reclaim list
|
|
|
|
*/
|
2011-05-18 14:08:07 +02:00
|
|
|
if (!fidp->ref && fidp->clunked) {
|
2011-12-04 18:05:28 +01:00
|
|
|
if (fidp->fid == pdu->s->root_fid) {
|
|
|
|
/*
|
|
|
|
* if the clunked fid is root fid then we
|
|
|
|
* have unmounted the fs on the client side.
|
|
|
|
* delete the migration blocker. Ideally, this
|
|
|
|
* should be hooked to transport close notification
|
|
|
|
*/
|
|
|
|
if (pdu->s->migration_blocker) {
|
|
|
|
migrate_del_blocker(pdu->s->migration_blocker);
|
|
|
|
error_free(pdu->s->migration_blocker);
|
|
|
|
pdu->s->migration_blocker = NULL;
|
|
|
|
}
|
|
|
|
}
|
2013-02-05 06:57:46 +01:00
|
|
|
return free_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
}
|
2013-02-05 06:57:46 +01:00
|
|
|
return 0;
|
2011-05-18 14:08:07 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:24 +02:00
|
|
|
static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid)
|
2011-05-18 14:08:07 +02:00
|
|
|
{
|
2010-04-29 14:14:48 +02:00
|
|
|
V9fsFidState **fidpp, *fidp;
|
|
|
|
|
|
|
|
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
|
|
|
if ((*fidpp)->fid == fid) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (*fidpp == NULL) {
|
2011-08-02 08:06:24 +02:00
|
|
|
return NULL;
|
2010-04-29 14:14:48 +02:00
|
|
|
}
|
|
|
|
fidp = *fidpp;
|
|
|
|
*fidpp = fidp->next;
|
2011-05-18 14:08:07 +02:00
|
|
|
fidp->clunked = 1;
|
2011-08-02 08:06:24 +02:00
|
|
|
return fidp;
|
2010-04-29 14:14:48 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
void v9fs_reclaim_fd(V9fsPDU *pdu)
|
2011-05-18 12:10:57 +02:00
|
|
|
{
|
|
|
|
int reclaim_count = 0;
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsState *s = pdu->s;
|
2011-05-18 12:10:57 +02:00
|
|
|
V9fsFidState *f, *reclaim_list = NULL;
|
|
|
|
|
|
|
|
for (f = s->fid_list; f; f = f->next) {
|
|
|
|
/*
|
|
|
|
* Unlink fids cannot be reclaimed. Check
|
|
|
|
* for them and skip them. Also skip fids
|
|
|
|
* currently being operated on.
|
|
|
|
*/
|
|
|
|
if (f->ref || f->flags & FID_NON_RECLAIMABLE) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* if it is a recently referenced fid
|
|
|
|
* we leave the fid untouched and clear the
|
|
|
|
* reference bit. We come back to it later
|
|
|
|
* in the next iteration. (a simple LRU without
|
|
|
|
* moving list elements around)
|
|
|
|
*/
|
|
|
|
if (f->flags & FID_REFERENCED) {
|
|
|
|
f->flags &= ~FID_REFERENCED;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Add fids to reclaim list.
|
|
|
|
*/
|
|
|
|
if (f->fid_type == P9_FID_FILE) {
|
|
|
|
if (f->fs.fd != -1) {
|
|
|
|
/*
|
|
|
|
* Up the reference count so that
|
|
|
|
* a clunk request won't free this fid
|
|
|
|
*/
|
|
|
|
f->ref++;
|
|
|
|
f->rclm_lst = reclaim_list;
|
|
|
|
reclaim_list = f;
|
|
|
|
f->fs_reclaim.fd = f->fs.fd;
|
|
|
|
f->fs.fd = -1;
|
|
|
|
reclaim_count++;
|
|
|
|
}
|
2011-05-18 13:38:34 +02:00
|
|
|
} else if (f->fid_type == P9_FID_DIR) {
|
|
|
|
if (f->fs.dir != NULL) {
|
|
|
|
/*
|
|
|
|
* Up the reference count so that
|
|
|
|
* a clunk request won't free this fid
|
|
|
|
*/
|
|
|
|
f->ref++;
|
|
|
|
f->rclm_lst = reclaim_list;
|
|
|
|
reclaim_list = f;
|
|
|
|
f->fs_reclaim.dir = f->fs.dir;
|
|
|
|
f->fs.dir = NULL;
|
|
|
|
reclaim_count++;
|
|
|
|
}
|
2011-05-18 12:10:57 +02:00
|
|
|
}
|
|
|
|
if (reclaim_count >= open_fd_rc) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Now close the fid in reclaim list. Free them if they
|
|
|
|
* are already clunked.
|
|
|
|
*/
|
|
|
|
while (reclaim_list) {
|
|
|
|
f = reclaim_list;
|
|
|
|
reclaim_list = f->rclm_lst;
|
|
|
|
if (f->fid_type == P9_FID_FILE) {
|
2011-10-25 08:40:40 +02:00
|
|
|
v9fs_co_close(pdu, &f->fs_reclaim);
|
2011-05-18 13:38:34 +02:00
|
|
|
} else if (f->fid_type == P9_FID_DIR) {
|
2011-10-25 08:40:40 +02:00
|
|
|
v9fs_co_closedir(pdu, &f->fs_reclaim);
|
2011-05-18 12:10:57 +02:00
|
|
|
}
|
|
|
|
f->rclm_lst = NULL;
|
|
|
|
/*
|
|
|
|
* Now drop the fid reference, free it
|
|
|
|
* if clunked.
|
|
|
|
*/
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, f);
|
2011-05-18 12:10:57 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path)
|
2011-05-18 12:10:57 +02:00
|
|
|
{
|
|
|
|
int err;
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsState *s = pdu->s;
|
2011-05-18 12:10:57 +02:00
|
|
|
V9fsFidState *fidp, head_fid;
|
|
|
|
|
|
|
|
head_fid.next = s->fid_list;
|
|
|
|
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2011-09-09 11:44:18 +02:00
|
|
|
if (fidp->path.size != path->size) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (!memcmp(fidp->path.data, path->data, path->size)) {
|
2011-05-18 12:10:57 +02:00
|
|
|
/* Mark the fid non reclaimable. */
|
|
|
|
fidp->flags |= FID_NON_RECLAIMABLE;
|
2011-08-02 08:06:24 +02:00
|
|
|
|
|
|
|
/* reopen the file/dir if already closed */
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_reopen_fid(pdu, fidp);
|
2011-08-02 08:06:24 +02:00
|
|
|
if (err < 0) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Go back to head of fid list because
|
|
|
|
* the list could have got updated when
|
|
|
|
* switched to the worker thread
|
|
|
|
*/
|
|
|
|
if (err == 0) {
|
2011-05-18 12:10:57 +02:00
|
|
|
fidp = &head_fid;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-12-04 18:05:28 +01:00
|
|
|
static void virtfs_reset(V9fsPDU *pdu)
|
|
|
|
{
|
|
|
|
V9fsState *s = pdu->s;
|
|
|
|
V9fsFidState *fidp = NULL;
|
|
|
|
|
|
|
|
/* Free all fids */
|
|
|
|
while (s->fid_list) {
|
|
|
|
fidp = s->fid_list;
|
|
|
|
s->fid_list = fidp->next;
|
|
|
|
|
|
|
|
if (fidp->ref) {
|
|
|
|
fidp->clunked = 1;
|
|
|
|
} else {
|
|
|
|
free_fid(pdu, fidp);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (fidp) {
|
|
|
|
/* One or more unclunked fids found... */
|
|
|
|
error_report("9pfs:%s: One or more uncluncked fids "
|
|
|
|
"found during reset", __func__);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-04-29 14:14:48 +02:00
|
|
|
#define P9_QID_TYPE_DIR 0x80
|
|
|
|
#define P9_QID_TYPE_SYMLINK 0x02
|
|
|
|
|
|
|
|
#define P9_STAT_MODE_DIR 0x80000000
|
|
|
|
#define P9_STAT_MODE_APPEND 0x40000000
|
|
|
|
#define P9_STAT_MODE_EXCL 0x20000000
|
|
|
|
#define P9_STAT_MODE_MOUNT 0x10000000
|
|
|
|
#define P9_STAT_MODE_AUTH 0x08000000
|
|
|
|
#define P9_STAT_MODE_TMP 0x04000000
|
|
|
|
#define P9_STAT_MODE_SYMLINK 0x02000000
|
|
|
|
#define P9_STAT_MODE_LINK 0x01000000
|
|
|
|
#define P9_STAT_MODE_DEVICE 0x00800000
|
|
|
|
#define P9_STAT_MODE_NAMED_PIPE 0x00200000
|
|
|
|
#define P9_STAT_MODE_SOCKET 0x00100000
|
|
|
|
#define P9_STAT_MODE_SETUID 0x00080000
|
|
|
|
#define P9_STAT_MODE_SETGID 0x00040000
|
|
|
|
#define P9_STAT_MODE_SETVTX 0x00010000
|
|
|
|
|
|
|
|
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
|
|
|
P9_STAT_MODE_SYMLINK | \
|
|
|
|
P9_STAT_MODE_LINK | \
|
|
|
|
P9_STAT_MODE_DEVICE | \
|
|
|
|
P9_STAT_MODE_NAMED_PIPE | \
|
|
|
|
P9_STAT_MODE_SOCKET)
|
|
|
|
|
|
|
|
/* This is the algorithm from ufs in spfs */
|
|
|
|
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
|
|
|
|
{
|
|
|
|
size_t size;
|
|
|
|
|
2011-08-02 08:06:24 +02:00
|
|
|
memset(&qidp->path, 0, sizeof(qidp->path));
|
2010-04-29 14:14:48 +02:00
|
|
|
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
|
|
|
|
memcpy(&qidp->path, &stbuf->st_ino, size);
|
|
|
|
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
|
|
|
qidp->type = 0;
|
|
|
|
if (S_ISDIR(stbuf->st_mode)) {
|
|
|
|
qidp->type |= P9_QID_TYPE_DIR;
|
|
|
|
}
|
|
|
|
if (S_ISLNK(stbuf->st_mode)) {
|
|
|
|
qidp->type |= P9_QID_TYPE_SYMLINK;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp)
|
2010-04-29 14:14:48 +02:00
|
|
|
{
|
|
|
|
struct stat stbuf;
|
|
|
|
int err;
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
|
2011-05-08 09:45:29 +02:00
|
|
|
if (err < 0) {
|
2010-04-29 14:14:48 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
stat_to_qid(&stbuf, qidp);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-04-29 14:14:44 +02:00
|
|
|
static V9fsPDU *alloc_pdu(V9fsState *s)
|
|
|
|
{
|
|
|
|
V9fsPDU *pdu = NULL;
|
|
|
|
|
|
|
|
if (!QLIST_EMPTY(&s->free_list)) {
|
2011-08-02 08:06:17 +02:00
|
|
|
pdu = QLIST_FIRST(&s->free_list);
|
|
|
|
QLIST_REMOVE(pdu, next);
|
|
|
|
QLIST_INSERT_HEAD(&s->active_list, pdu, next);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
return pdu;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void free_pdu(V9fsState *s, V9fsPDU *pdu)
|
|
|
|
{
|
|
|
|
if (pdu) {
|
2011-08-02 08:06:17 +02:00
|
|
|
/*
|
|
|
|
* Cancelled pdu are added back to the freelist
|
|
|
|
* by flush request .
|
|
|
|
*/
|
|
|
|
if (!pdu->cancelled) {
|
|
|
|
QLIST_REMOVE(pdu, next);
|
|
|
|
QLIST_INSERT_HEAD(&s->free_list, pdu, next);
|
|
|
|
}
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
/*
|
|
|
|
* We don't do error checking for pdu_marshal/unmarshal here
|
|
|
|
* because we always expect to have enough space to encode
|
|
|
|
* error details
|
|
|
|
*/
|
2010-04-29 14:14:45 +02:00
|
|
|
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
|
|
|
|
{
|
|
|
|
int8_t id = pdu->id + 1; /* Response */
|
|
|
|
|
|
|
|
if (len < 0) {
|
|
|
|
int err = -len;
|
2010-07-28 10:40:22 +02:00
|
|
|
len = 7;
|
2010-04-29 14:14:45 +02:00
|
|
|
|
2010-07-28 10:40:22 +02:00
|
|
|
if (s->proto_version != V9FS_PROTO_2000L) {
|
|
|
|
V9fsString str;
|
|
|
|
|
|
|
|
str.data = strerror(err);
|
|
|
|
str.size = strlen(str.data);
|
|
|
|
|
|
|
|
len += pdu_marshal(pdu, len, "s", &str);
|
|
|
|
id = P9_RERROR;
|
|
|
|
}
|
2010-04-29 14:14:45 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
len += pdu_marshal(pdu, len, "d", err);
|
2010-04-29 14:14:45 +02:00
|
|
|
|
2010-07-28 10:40:22 +02:00
|
|
|
if (s->proto_version == V9FS_PROTO_2000L) {
|
|
|
|
id = P9_RLERROR;
|
|
|
|
}
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */
|
2010-04-29 14:14:45 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* fill out the header */
|
|
|
|
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
|
|
|
|
|
|
|
|
/* keep these in sync */
|
|
|
|
pdu->size = len;
|
|
|
|
pdu->id = id;
|
|
|
|
|
|
|
|
/* push onto queue and notify */
|
|
|
|
virtqueue_push(s->vq, &pdu->elem, len);
|
|
|
|
|
|
|
|
/* FIXME: we should batch these completions */
|
2013-04-23 11:08:43 +02:00
|
|
|
virtio_notify(VIRTIO_DEVICE(s), s->vq);
|
2010-04-29 14:14:45 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
/* Now wakeup anybody waiting in flush for this request */
|
|
|
|
qemu_co_queue_next(&pdu->complete);
|
|
|
|
|
2010-04-29 14:14:45 +02:00
|
|
|
free_pdu(s, pdu);
|
|
|
|
}
|
|
|
|
|
2010-04-29 14:14:49 +02:00
|
|
|
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
|
|
|
{
|
|
|
|
mode_t ret;
|
|
|
|
|
|
|
|
ret = mode & 0777;
|
|
|
|
if (mode & P9_STAT_MODE_DIR) {
|
|
|
|
ret |= S_IFDIR;
|
|
|
|
}
|
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (mode & P9_STAT_MODE_SYMLINK) {
|
|
|
|
ret |= S_IFLNK;
|
|
|
|
}
|
|
|
|
if (mode & P9_STAT_MODE_SOCKET) {
|
|
|
|
ret |= S_IFSOCK;
|
|
|
|
}
|
|
|
|
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
|
|
|
ret |= S_IFIFO;
|
|
|
|
}
|
|
|
|
if (mode & P9_STAT_MODE_DEVICE) {
|
2013-05-20 07:59:52 +02:00
|
|
|
if (extension->size && extension->data[0] == 'c') {
|
2010-07-28 10:25:05 +02:00
|
|
|
ret |= S_IFCHR;
|
|
|
|
} else {
|
|
|
|
ret |= S_IFBLK;
|
2010-04-29 14:14:49 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(ret&~0777)) {
|
|
|
|
ret |= S_IFREG;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mode & P9_STAT_MODE_SETUID) {
|
|
|
|
ret |= S_ISUID;
|
|
|
|
}
|
|
|
|
if (mode & P9_STAT_MODE_SETGID) {
|
|
|
|
ret |= S_ISGID;
|
|
|
|
}
|
|
|
|
if (mode & P9_STAT_MODE_SETVTX) {
|
|
|
|
ret |= S_ISVTX;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int donttouch_stat(V9fsStat *stat)
|
|
|
|
{
|
|
|
|
if (stat->type == -1 &&
|
|
|
|
stat->dev == -1 &&
|
|
|
|
stat->qid.type == -1 &&
|
|
|
|
stat->qid.version == -1 &&
|
|
|
|
stat->qid.path == -1 &&
|
|
|
|
stat->mode == -1 &&
|
|
|
|
stat->atime == -1 &&
|
|
|
|
stat->mtime == -1 &&
|
|
|
|
stat->length == -1 &&
|
|
|
|
!stat->name.size &&
|
|
|
|
!stat->uid.size &&
|
|
|
|
!stat->gid.size &&
|
|
|
|
!stat->muid.size &&
|
|
|
|
stat->n_uid == -1 &&
|
|
|
|
stat->n_gid == -1 &&
|
|
|
|
stat->n_muid == -1) {
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
static void v9fs_stat_init(V9fsStat *stat)
|
|
|
|
{
|
|
|
|
v9fs_string_init(&stat->name);
|
|
|
|
v9fs_string_init(&stat->uid);
|
|
|
|
v9fs_string_init(&stat->gid);
|
|
|
|
v9fs_string_init(&stat->muid);
|
|
|
|
v9fs_string_init(&stat->extension);
|
|
|
|
}
|
|
|
|
|
2010-04-29 14:14:49 +02:00
|
|
|
static void v9fs_stat_free(V9fsStat *stat)
|
|
|
|
{
|
|
|
|
v9fs_string_free(&stat->name);
|
|
|
|
v9fs_string_free(&stat->uid);
|
|
|
|
v9fs_string_free(&stat->gid);
|
|
|
|
v9fs_string_free(&stat->muid);
|
|
|
|
v9fs_string_free(&stat->extension);
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t stat_to_v9mode(const struct stat *stbuf)
|
|
|
|
{
|
|
|
|
uint32_t mode;
|
|
|
|
|
|
|
|
mode = stbuf->st_mode & 0777;
|
|
|
|
if (S_ISDIR(stbuf->st_mode)) {
|
|
|
|
mode |= P9_STAT_MODE_DIR;
|
|
|
|
}
|
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (S_ISLNK(stbuf->st_mode)) {
|
|
|
|
mode |= P9_STAT_MODE_SYMLINK;
|
|
|
|
}
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (S_ISSOCK(stbuf->st_mode)) {
|
|
|
|
mode |= P9_STAT_MODE_SOCKET;
|
|
|
|
}
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (S_ISFIFO(stbuf->st_mode)) {
|
|
|
|
mode |= P9_STAT_MODE_NAMED_PIPE;
|
|
|
|
}
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
|
|
|
mode |= P9_STAT_MODE_DEVICE;
|
|
|
|
}
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (stbuf->st_mode & S_ISUID) {
|
|
|
|
mode |= P9_STAT_MODE_SETUID;
|
|
|
|
}
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (stbuf->st_mode & S_ISGID) {
|
|
|
|
mode |= P9_STAT_MODE_SETGID;
|
|
|
|
}
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (stbuf->st_mode & S_ISVTX) {
|
|
|
|
mode |= P9_STAT_MODE_SETVTX;
|
2010-04-29 14:14:49 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return mode;
|
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name,
|
2010-04-29 14:14:49 +02:00
|
|
|
const struct stat *stbuf,
|
|
|
|
V9fsStat *v9stat)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
const char *str;
|
|
|
|
|
|
|
|
memset(v9stat, 0, sizeof(*v9stat));
|
|
|
|
|
|
|
|
stat_to_qid(stbuf, &v9stat->qid);
|
|
|
|
v9stat->mode = stat_to_v9mode(stbuf);
|
|
|
|
v9stat->atime = stbuf->st_atime;
|
|
|
|
v9stat->mtime = stbuf->st_mtime;
|
|
|
|
v9stat->length = stbuf->st_size;
|
|
|
|
|
|
|
|
v9fs_string_null(&v9stat->uid);
|
|
|
|
v9fs_string_null(&v9stat->gid);
|
|
|
|
v9fs_string_null(&v9stat->muid);
|
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
v9stat->n_uid = stbuf->st_uid;
|
|
|
|
v9stat->n_gid = stbuf->st_gid;
|
|
|
|
v9stat->n_muid = 0;
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
v9fs_string_null(&v9stat->extension);
|
2010-04-29 14:14:49 +02:00
|
|
|
|
2010-07-28 10:25:05 +02:00
|
|
|
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_readlink(pdu, name, &v9stat->extension);
|
2011-08-08 20:06:41 +02:00
|
|
|
if (err < 0) {
|
2010-07-28 10:25:05 +02:00
|
|
|
return err;
|
2010-04-29 14:14:49 +02:00
|
|
|
}
|
2010-07-28 10:25:05 +02:00
|
|
|
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) {
|
|
|
|
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
|
|
|
S_ISCHR(stbuf->st_mode) ? 'c' : 'b',
|
|
|
|
major(stbuf->st_rdev), minor(stbuf->st_rdev));
|
|
|
|
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) {
|
2010-09-27 18:45:47 +02:00
|
|
|
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
|
|
|
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink);
|
2010-04-29 14:14:49 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
str = strrchr(name->data, '/');
|
|
|
|
if (str) {
|
|
|
|
str += 1;
|
|
|
|
} else {
|
|
|
|
str = name->data;
|
|
|
|
}
|
|
|
|
|
|
|
|
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
|
|
|
|
|
|
|
v9stat->size = 61 +
|
|
|
|
v9fs_string_size(&v9stat->name) +
|
|
|
|
v9fs_string_size(&v9stat->uid) +
|
|
|
|
v9fs_string_size(&v9stat->gid) +
|
|
|
|
v9fs_string_size(&v9stat->muid) +
|
|
|
|
v9fs_string_size(&v9stat->extension);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
#define P9_STATS_MODE 0x00000001ULL
|
|
|
|
#define P9_STATS_NLINK 0x00000002ULL
|
|
|
|
#define P9_STATS_UID 0x00000004ULL
|
|
|
|
#define P9_STATS_GID 0x00000008ULL
|
|
|
|
#define P9_STATS_RDEV 0x00000010ULL
|
|
|
|
#define P9_STATS_ATIME 0x00000020ULL
|
|
|
|
#define P9_STATS_MTIME 0x00000040ULL
|
|
|
|
#define P9_STATS_CTIME 0x00000080ULL
|
|
|
|
#define P9_STATS_INO 0x00000100ULL
|
|
|
|
#define P9_STATS_SIZE 0x00000200ULL
|
|
|
|
#define P9_STATS_BLOCKS 0x00000400ULL
|
|
|
|
|
|
|
|
#define P9_STATS_BTIME 0x00000800ULL
|
|
|
|
#define P9_STATS_GEN 0x00001000ULL
|
|
|
|
#define P9_STATS_DATA_VERSION 0x00002000ULL
|
|
|
|
|
|
|
|
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
|
|
|
|
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
|
|
|
|
|
|
|
|
|
|
|
|
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf,
|
2011-05-19 01:04:33 +02:00
|
|
|
V9fsStatDotl *v9lstat)
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
{
|
|
|
|
memset(v9lstat, 0, sizeof(*v9lstat));
|
|
|
|
|
|
|
|
v9lstat->st_mode = stbuf->st_mode;
|
|
|
|
v9lstat->st_nlink = stbuf->st_nlink;
|
|
|
|
v9lstat->st_uid = stbuf->st_uid;
|
|
|
|
v9lstat->st_gid = stbuf->st_gid;
|
|
|
|
v9lstat->st_rdev = stbuf->st_rdev;
|
|
|
|
v9lstat->st_size = stbuf->st_size;
|
|
|
|
v9lstat->st_blksize = stbuf->st_blksize;
|
|
|
|
v9lstat->st_blocks = stbuf->st_blocks;
|
|
|
|
v9lstat->st_atime_sec = stbuf->st_atime;
|
|
|
|
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec;
|
|
|
|
v9lstat->st_mtime_sec = stbuf->st_mtime;
|
|
|
|
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec;
|
|
|
|
v9lstat->st_ctime_sec = stbuf->st_ctime;
|
|
|
|
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec;
|
|
|
|
/* Currently we only support BASIC fields in stat */
|
|
|
|
v9lstat->st_result_mask = P9_STATS_BASIC;
|
|
|
|
|
|
|
|
stat_to_qid(stbuf, &v9lstat->qid);
|
|
|
|
}
|
|
|
|
|
2010-04-29 14:14:50 +02:00
|
|
|
static void print_sg(struct iovec *sg, int cnt)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
printf("sg[%d]: {", cnt);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
|
|
if (i) {
|
|
|
|
printf(", ");
|
|
|
|
}
|
|
|
|
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
|
|
|
}
|
|
|
|
printf("}\n");
|
|
|
|
}
|
|
|
|
|
2011-09-09 11:44:18 +02:00
|
|
|
/* Will call this only for path name based fid */
|
|
|
|
static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len)
|
2010-04-29 14:15:00 +02:00
|
|
|
{
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsPath str;
|
|
|
|
v9fs_path_init(&str);
|
|
|
|
v9fs_path_copy(&str, dst);
|
|
|
|
v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len);
|
|
|
|
v9fs_path_free(&str);
|
|
|
|
/* +1 to include terminating NULL */
|
|
|
|
dst->size++;
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
|
|
|
|
2011-10-25 08:40:39 +02:00
|
|
|
static inline bool is_ro_export(FsContext *ctx)
|
|
|
|
{
|
|
|
|
return ctx->export_flags & V9FS_RDONLY;
|
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_version(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2011-12-14 09:19:13 +01:00
|
|
|
ssize_t err;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:14:51 +02:00
|
|
|
V9fsString version;
|
|
|
|
size_t offset = 7;
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&version);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
|
|
|
if (err < 0) {
|
|
|
|
offset = err;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data);
|
2010-04-29 14:14:51 +02:00
|
|
|
|
2011-12-04 18:05:28 +01:00
|
|
|
virtfs_reset(pdu);
|
|
|
|
|
2010-05-27 10:27:29 +02:00
|
|
|
if (!strcmp(version.data, "9P2000.u")) {
|
|
|
|
s->proto_version = V9FS_PROTO_2000U;
|
|
|
|
} else if (!strcmp(version.data, "9P2000.L")) {
|
|
|
|
s->proto_version = V9FS_PROTO_2000L;
|
|
|
|
} else {
|
2010-04-29 14:14:51 +02:00
|
|
|
v9fs_string_sprintf(&version, "unknown");
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2010-04-29 14:14:51 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
|
|
|
if (err < 0) {
|
|
|
|
offset = err;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
offset += err;
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data);
|
2011-12-14 09:19:13 +01:00
|
|
|
out:
|
2010-04-29 14:14:51 +02:00
|
|
|
complete_pdu(s, pdu, offset);
|
|
|
|
v9fs_string_free(&version);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_attach(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:14:52 +02:00
|
|
|
int32_t fid, afid, n_uname;
|
|
|
|
V9fsString uname, aname;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
size_t offset = 7;
|
2011-05-08 09:45:29 +02:00
|
|
|
V9fsQID qid;
|
2010-04-29 14:14:52 +02:00
|
|
|
ssize_t err;
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&uname);
|
|
|
|
v9fs_string_init(&aname);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "ddssd", &fid,
|
|
|
|
&afid, &uname, &aname, &n_uname);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data);
|
2010-04-29 14:14:52 +02:00
|
|
|
|
|
|
|
fidp = alloc_fid(s, fid);
|
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2010-04-29 14:14:52 +02:00
|
|
|
fidp->uid = n_uname;
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
err = -EINVAL;
|
|
|
|
clunk_fid(s, fid);
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = fid_to_qid(pdu, fidp, &qid);
|
2011-05-08 09:45:29 +02:00
|
|
|
if (err < 0) {
|
2010-04-29 14:14:52 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
clunk_fid(s, fid);
|
2010-04-29 14:14:52 +02:00
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Q", &qid);
|
|
|
|
if (err < 0) {
|
|
|
|
clunk_fid(s, fid);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_attach_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path);
|
2012-07-31 09:23:18 +02:00
|
|
|
/*
|
|
|
|
* disable migration if we haven't done already.
|
|
|
|
* attach could get called multiple times for the same export.
|
|
|
|
*/
|
|
|
|
if (!s->migration_blocker) {
|
|
|
|
s->root_fid = fid;
|
|
|
|
error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION,
|
|
|
|
s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag);
|
|
|
|
migrate_add_blocker(s->migration_blocker);
|
|
|
|
}
|
2010-04-29 14:14:52 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2010-04-29 14:14:52 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
v9fs_string_free(&uname);
|
|
|
|
v9fs_string_free(&aname);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_stat(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2010-04-29 14:14:53 +02:00
|
|
|
int32_t fid;
|
2011-05-07 14:59:24 +02:00
|
|
|
V9fsStat v9stat;
|
2010-04-29 14:14:53 +02:00
|
|
|
ssize_t err = 0;
|
2011-05-07 14:59:24 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:14:53 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_stat(pdu->tag, pdu->id, fid);
|
2011-05-18 14:08:07 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-07 14:59:24 +02:00
|
|
|
if (fidp == NULL) {
|
2010-04-29 14:14:53 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
|
2011-05-07 14:59:24 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat);
|
2011-05-07 14:59:24 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "wS", 0, &v9stat);
|
|
|
|
if (err < 0) {
|
|
|
|
v9fs_stat_free(&v9stat);
|
|
|
|
goto out;
|
|
|
|
}
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode,
|
|
|
|
v9stat.atime, v9stat.mtime, v9stat.length);
|
2011-12-14 09:19:13 +01:00
|
|
|
err += offset;
|
2011-05-07 14:59:24 +02:00
|
|
|
v9fs_stat_free(&v9stat);
|
2010-04-29 14:14:53 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-07 14:59:24 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_getattr(void *opaque)
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
{
|
|
|
|
int32_t fid;
|
2011-05-19 01:04:33 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
ssize_t retval = 0;
|
|
|
|
struct stat stbuf;
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
V9fsFidState *fidp;
|
|
|
|
uint64_t request_mask;
|
2011-05-19 01:04:33 +02:00
|
|
|
V9fsStatDotl v9stat_dotl;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask);
|
|
|
|
if (retval < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask);
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
if (fidp == NULL) {
|
2011-05-19 01:04:33 +02:00
|
|
|
retval = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
}
|
2011-05-19 01:04:33 +02:00
|
|
|
/*
|
|
|
|
* Currently we only support BASIC fields in stat, so there is no
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
* need to look at request_mask.
|
|
|
|
*/
|
2011-08-02 08:06:17 +02:00
|
|
|
retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
|
2011-05-19 01:04:33 +02:00
|
|
|
if (retval < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl);
|
2011-10-12 15:41:25 +02:00
|
|
|
|
|
|
|
/* fill st_gen if requested and supported by underlying fs */
|
|
|
|
if (request_mask & P9_STATS_GEN) {
|
|
|
|
retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl);
|
2014-01-28 16:08:27 +01:00
|
|
|
switch (retval) {
|
|
|
|
case 0:
|
|
|
|
/* we have valid st_gen: update result mask */
|
|
|
|
v9stat_dotl.st_result_mask |= P9_STATS_GEN;
|
|
|
|
break;
|
|
|
|
case -EINTR:
|
|
|
|
/* request cancelled, e.g. by Tflush */
|
2011-10-12 15:41:25 +02:00
|
|
|
goto out;
|
2014-01-28 16:08:27 +01:00
|
|
|
default:
|
|
|
|
/* failed to get st_gen: not fatal, ignore */
|
|
|
|
break;
|
2011-10-12 15:41:25 +02:00
|
|
|
}
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl);
|
|
|
|
if (retval < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
retval += offset;
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask,
|
|
|
|
v9stat_dotl.st_mode, v9stat_dotl.st_uid,
|
|
|
|
v9stat_dotl.st_gid);
|
2011-10-24 11:39:49 +02:00
|
|
|
out:
|
|
|
|
put_fid(pdu, fidp);
|
|
|
|
out_nofid:
|
2011-05-19 01:04:33 +02:00
|
|
|
complete_pdu(s, pdu, retval);
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
}
|
|
|
|
|
2011-12-21 08:07:23 +01:00
|
|
|
/* Attribute flags */
|
|
|
|
#define P9_ATTR_MODE (1 << 0)
|
|
|
|
#define P9_ATTR_UID (1 << 1)
|
|
|
|
#define P9_ATTR_GID (1 << 2)
|
|
|
|
#define P9_ATTR_SIZE (1 << 3)
|
|
|
|
#define P9_ATTR_ATIME (1 << 4)
|
|
|
|
#define P9_ATTR_MTIME (1 << 5)
|
|
|
|
#define P9_ATTR_CTIME (1 << 6)
|
|
|
|
#define P9_ATTR_ATIME_SET (1 << 7)
|
|
|
|
#define P9_ATTR_MTIME_SET (1 << 8)
|
|
|
|
|
|
|
|
#define P9_ATTR_MASK 127
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
|
2011-05-19 01:05:10 +02:00
|
|
|
static void v9fs_setattr(void *opaque)
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
{
|
2011-05-19 01:05:10 +02:00
|
|
|
int err = 0;
|
|
|
|
int32_t fid;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsIattr v9iattr;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-19 01:05:10 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
}
|
2011-12-21 08:07:23 +01:00
|
|
|
if (v9iattr.valid & P9_ATTR_MODE) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode);
|
2011-05-19 01:05:10 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
}
|
|
|
|
}
|
2011-12-21 08:07:23 +01:00
|
|
|
if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) {
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
struct timespec times[2];
|
2011-12-21 08:07:23 +01:00
|
|
|
if (v9iattr.valid & P9_ATTR_ATIME) {
|
|
|
|
if (v9iattr.valid & P9_ATTR_ATIME_SET) {
|
2011-05-19 01:05:10 +02:00
|
|
|
times[0].tv_sec = v9iattr.atime_sec;
|
|
|
|
times[0].tv_nsec = v9iattr.atime_nsec;
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
} else {
|
|
|
|
times[0].tv_nsec = UTIME_NOW;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
times[0].tv_nsec = UTIME_OMIT;
|
|
|
|
}
|
2011-12-21 08:07:23 +01:00
|
|
|
if (v9iattr.valid & P9_ATTR_MTIME) {
|
|
|
|
if (v9iattr.valid & P9_ATTR_MTIME_SET) {
|
2011-05-19 01:05:10 +02:00
|
|
|
times[1].tv_sec = v9iattr.mtime_sec;
|
|
|
|
times[1].tv_nsec = v9iattr.mtime_nsec;
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
} else {
|
|
|
|
times[1].tv_nsec = UTIME_NOW;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
times[1].tv_nsec = UTIME_OMIT;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_utimensat(pdu, &fidp->path, times);
|
2011-05-19 01:05:10 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
}
|
2011-05-19 01:05:10 +02:00
|
|
|
/*
|
|
|
|
* If the only valid entry in iattr is ctime we can call
|
|
|
|
* chown(-1,-1) to update the ctime of the file
|
|
|
|
*/
|
2011-12-21 08:07:23 +01:00
|
|
|
if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) ||
|
|
|
|
((v9iattr.valid & P9_ATTR_CTIME)
|
|
|
|
&& !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) {
|
|
|
|
if (!(v9iattr.valid & P9_ATTR_UID)) {
|
2011-05-19 01:05:10 +02:00
|
|
|
v9iattr.uid = -1;
|
|
|
|
}
|
2011-12-21 08:07:23 +01:00
|
|
|
if (!(v9iattr.valid & P9_ATTR_GID)) {
|
2011-05-19 01:05:10 +02:00
|
|
|
v9iattr.gid = -1;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid,
|
2011-05-19 01:05:10 +02:00
|
|
|
v9iattr.gid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
}
|
2011-12-21 08:07:23 +01:00
|
|
|
if (v9iattr.valid & (P9_ATTR_SIZE)) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size);
|
2011-05-19 01:05:10 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
}
|
2011-05-19 01:05:10 +02:00
|
|
|
err = offset;
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-19 01:05:10 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
}
|
|
|
|
|
2011-05-07 16:11:55 +02:00
|
|
|
static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids)
|
2010-04-29 14:14:54 +02:00
|
|
|
{
|
|
|
|
int i;
|
2011-12-14 09:19:13 +01:00
|
|
|
ssize_t err;
|
2011-05-07 16:11:55 +02:00
|
|
|
size_t offset = 7;
|
2011-12-14 09:19:13 +01:00
|
|
|
|
|
|
|
err = pdu_marshal(pdu, offset, "w", nwnames);
|
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
offset += err;
|
2011-05-07 16:11:55 +02:00
|
|
|
for (i = 0; i < nwnames; i++) {
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Q", &qids[i]);
|
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
offset += err;
|
2010-04-29 14:14:54 +02:00
|
|
|
}
|
2011-05-07 16:11:55 +02:00
|
|
|
return offset;
|
2010-04-29 14:14:54 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_walk(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2011-05-07 16:11:55 +02:00
|
|
|
int name_idx;
|
|
|
|
V9fsQID *qids = NULL;
|
|
|
|
int i, err = 0;
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsPath dpath, path;
|
2011-05-07 16:11:55 +02:00
|
|
|
uint16_t nwnames;
|
|
|
|
struct stat stbuf;
|
|
|
|
size_t offset = 7;
|
|
|
|
int32_t fid, newfid;
|
|
|
|
V9fsString *wnames = NULL;
|
|
|
|
V9fsFidState *fidp;
|
2011-11-29 09:52:38 +01:00
|
|
|
V9fsFidState *newfidp = NULL;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:14:54 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames);
|
|
|
|
if (err < 0) {
|
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
return ;
|
|
|
|
}
|
|
|
|
offset += err;
|
2010-04-29 14:14:54 +02:00
|
|
|
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames);
|
|
|
|
|
2011-05-07 16:11:55 +02:00
|
|
|
if (nwnames && nwnames <= P9_MAXWELEM) {
|
|
|
|
wnames = g_malloc0(sizeof(wnames[0]) * nwnames);
|
|
|
|
qids = g_malloc0(sizeof(qids[0]) * nwnames);
|
|
|
|
for (i = 0; i < nwnames; i++) {
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "s", &wnames[i]);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
|
|
|
offset += err;
|
2010-04-29 14:14:54 +02:00
|
|
|
}
|
2011-05-07 16:11:55 +02:00
|
|
|
} else if (nwnames > P9_MAXWELEM) {
|
2011-04-14 11:24:40 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:54 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-07 16:11:55 +02:00
|
|
|
if (fidp == NULL) {
|
2010-04-29 14:14:54 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:54 +02:00
|
|
|
}
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_init(&dpath);
|
|
|
|
v9fs_path_init(&path);
|
|
|
|
/*
|
|
|
|
* Both dpath and path initially poin to fidp.
|
|
|
|
* Needed to handle request with nwnames == 0
|
|
|
|
*/
|
|
|
|
v9fs_path_copy(&dpath, &fidp->path);
|
|
|
|
v9fs_path_copy(&path, &fidp->path);
|
|
|
|
for (name_idx = 0; name_idx < nwnames; name_idx++) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &path, &stbuf);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
stat_to_qid(&stbuf, &qids[name_idx]);
|
|
|
|
v9fs_path_copy(&dpath, &path);
|
|
|
|
}
|
2010-04-29 14:14:54 +02:00
|
|
|
if (fid == newfid) {
|
2011-05-07 16:11:55 +02:00
|
|
|
BUG_ON(fidp->fid_type != P9_FID_NONE);
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2010-04-29 14:14:54 +02:00
|
|
|
} else {
|
2011-05-07 16:11:55 +02:00
|
|
|
newfidp = alloc_fid(s, newfid);
|
|
|
|
if (newfidp == NULL) {
|
2010-04-29 14:14:54 +02:00
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-05-07 16:11:55 +02:00
|
|
|
newfidp->uid = fidp->uid;
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_copy(&newfidp->path, &path);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2011-05-07 16:11:55 +02:00
|
|
|
err = v9fs_walk_marshal(pdu, nwnames, qids);
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids);
|
2010-04-29 14:14:54 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
if (newfidp) {
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, newfidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
}
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&dpath);
|
|
|
|
v9fs_path_free(&path);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-07 16:11:55 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
if (nwnames && nwnames <= P9_MAXWELEM) {
|
|
|
|
for (name_idx = 0; name_idx < nwnames; name_idx++) {
|
|
|
|
v9fs_string_free(&wnames[name_idx]);
|
|
|
|
}
|
|
|
|
g_free(wnames);
|
|
|
|
g_free(qids);
|
|
|
|
}
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path)
|
2010-06-09 15:44:28 +02:00
|
|
|
{
|
|
|
|
struct statfs stbuf;
|
|
|
|
int32_t iounit = 0;
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsState *s = pdu->s;
|
2010-06-09 15:44:28 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* iounit should be multiples of f_bsize (host filesystem block size
|
|
|
|
* and as well as less than (client msize - P9_IOHDRSZ))
|
|
|
|
*/
|
2011-08-02 08:06:17 +02:00
|
|
|
if (!v9fs_co_statfs(pdu, path, &stbuf)) {
|
2010-06-09 15:44:28 +02:00
|
|
|
iounit = stbuf.f_bsize;
|
|
|
|
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize;
|
|
|
|
}
|
|
|
|
if (!iounit) {
|
|
|
|
iounit = s->msize - P9_IOHDRSZ;
|
|
|
|
}
|
|
|
|
return iounit;
|
|
|
|
}
|
|
|
|
|
2011-05-07 14:06:36 +02:00
|
|
|
static void v9fs_open(void *opaque)
|
2010-06-09 15:44:28 +02:00
|
|
|
{
|
2011-05-07 14:06:36 +02:00
|
|
|
int flags;
|
|
|
|
int32_t fid;
|
|
|
|
int32_t mode;
|
|
|
|
V9fsQID qid;
|
2011-10-24 11:39:49 +02:00
|
|
|
int iounit = 0;
|
2011-05-07 14:06:36 +02:00
|
|
|
ssize_t err = 0;
|
|
|
|
size_t offset = 7;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-06-09 15:44:28 +02:00
|
|
|
|
2011-05-07 14:06:36 +02:00
|
|
|
if (s->proto_version == V9FS_PROTO_2000L) {
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode);
|
2011-05-07 14:06:36 +02:00
|
|
|
} else {
|
2012-02-24 01:23:30 +01:00
|
|
|
uint8_t modebyte;
|
|
|
|
err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte);
|
|
|
|
mode = modebyte;
|
2011-12-14 09:19:13 +01:00
|
|
|
}
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
2011-05-07 14:06:36 +02:00
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_open(pdu->tag, pdu->id, fid, mode);
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-07 14:06:36 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:55 +02:00
|
|
|
}
|
2011-05-07 14:06:36 +02:00
|
|
|
BUG_ON(fidp->fid_type != P9_FID_NONE);
|
2010-04-29 14:14:55 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
|
2011-05-07 14:06:36 +02:00
|
|
|
if (err < 0) {
|
2010-04-29 14:14:55 +02:00
|
|
|
goto out;
|
|
|
|
}
|
2011-05-07 14:06:36 +02:00
|
|
|
stat_to_qid(&stbuf, &qid);
|
|
|
|
if (S_ISDIR(stbuf.st_mode)) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_opendir(pdu, fidp);
|
2011-05-07 14:06:36 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
fidp->fid_type = P9_FID_DIR;
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Qd", &qid, 0);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2010-04-29 14:14:55 +02:00
|
|
|
} else {
|
2010-06-22 16:17:04 +02:00
|
|
|
if (s->proto_version == V9FS_PROTO_2000L) {
|
2011-10-12 15:41:23 +02:00
|
|
|
flags = get_dotl_openflags(s, mode);
|
2010-06-22 16:17:04 +02:00
|
|
|
} else {
|
2011-05-07 14:06:36 +02:00
|
|
|
flags = omode_to_uflags(mode);
|
2010-06-22 16:17:04 +02:00
|
|
|
}
|
2011-10-25 08:40:39 +02:00
|
|
|
if (is_ro_export(&s->ctx)) {
|
|
|
|
if (mode & O_WRONLY || mode & O_RDWR ||
|
|
|
|
mode & O_APPEND || mode & O_TRUNC) {
|
|
|
|
err = -EROFS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_open(pdu, fidp, flags);
|
2011-05-07 14:06:36 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
fidp->fid_type = P9_FID_FILE;
|
2011-05-18 12:10:57 +02:00
|
|
|
fidp->open_flags = flags;
|
|
|
|
if (flags & O_EXCL) {
|
|
|
|
/*
|
|
|
|
* We let the host file system do O_EXCL check
|
|
|
|
* We should not reclaim such fd
|
|
|
|
*/
|
|
|
|
fidp->flags |= FID_NON_RECLAIMABLE;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
iounit = get_iounit(pdu, &fidp->path);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2010-04-29 14:14:55 +02:00
|
|
|
}
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_open_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path, iounit);
|
2010-04-29 14:14:55 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2010-04-29 14:14:55 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_lcreate(void *opaque)
|
2010-06-18 03:27:24 +02:00
|
|
|
{
|
|
|
|
int32_t dfid, flags, mode;
|
|
|
|
gid_t gid;
|
|
|
|
ssize_t err = 0;
|
2011-08-08 20:24:08 +02:00
|
|
|
ssize_t offset = 7;
|
|
|
|
V9fsString name;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsQID qid;
|
|
|
|
int32_t iounit;
|
|
|
|
V9fsPDU *pdu = opaque;
|
2010-06-18 03:27:24 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsddd", &dfid,
|
|
|
|
&name, &flags, &mode, &gid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid);
|
2010-06-18 03:27:24 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, dfid);
|
2011-08-08 20:24:08 +02:00
|
|
|
if (fidp == NULL) {
|
2010-06-18 03:27:24 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-18 03:27:24 +02:00
|
|
|
}
|
|
|
|
|
2011-10-12 15:41:23 +02:00
|
|
|
flags = get_dotl_openflags(pdu->s, flags);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_open2(pdu, fidp, &name, gid,
|
2011-05-24 11:40:56 +02:00
|
|
|
flags | O_CREAT, mode, &stbuf);
|
2011-08-08 20:24:08 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
fidp->fid_type = P9_FID_FILE;
|
2011-05-18 12:10:57 +02:00
|
|
|
fidp->open_flags = flags;
|
|
|
|
if (flags & O_EXCL) {
|
|
|
|
/*
|
|
|
|
* We let the host file system do O_EXCL check
|
|
|
|
* We should not reclaim such fd
|
|
|
|
*/
|
|
|
|
fidp->flags |= FID_NON_RECLAIMABLE;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
iounit = get_iounit(pdu, &fidp->path);
|
2011-08-08 20:24:08 +02:00
|
|
|
stat_to_qid(&stbuf, &qid);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_lcreate_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path, iounit);
|
2010-06-18 03:27:24 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-08-08 20:24:08 +02:00
|
|
|
complete_pdu(pdu->s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
2010-06-18 03:27:24 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_fsync(void *opaque)
|
2010-09-23 02:18:33 +02:00
|
|
|
{
|
2011-05-07 17:55:51 +02:00
|
|
|
int err;
|
2010-09-23 02:18:33 +02:00
|
|
|
int32_t fid;
|
2011-05-07 17:55:51 +02:00
|
|
|
int datasync;
|
2010-09-23 02:18:33 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
V9fsFidState *fidp;
|
2011-05-07 17:55:51 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-09-23 02:18:33 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync);
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2010-09-23 02:18:33 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-09-23 02:18:33 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_fsync(pdu, fidp, datasync);
|
2011-05-07 17:55:51 +02:00
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-07 17:55:51 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2010-09-23 02:18:33 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_clunk(void *opaque)
|
2010-04-29 14:14:55 +02:00
|
|
|
{
|
2011-05-07 17:06:38 +02:00
|
|
|
int err;
|
2010-04-29 14:14:57 +02:00
|
|
|
int32_t fid;
|
|
|
|
size_t offset = 7;
|
2011-05-18 14:08:07 +02:00
|
|
|
V9fsFidState *fidp;
|
2011-05-07 17:06:38 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:14:57 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_clunk(pdu->tag, pdu->id, fid);
|
2011-05-18 14:08:07 +02:00
|
|
|
|
2011-08-02 08:06:24 +02:00
|
|
|
fidp = clunk_fid(s, fid);
|
2011-05-18 14:08:07 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -ENOENT;
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-08-02 08:06:24 +02:00
|
|
|
/*
|
|
|
|
* Bump the ref so that put_fid will
|
|
|
|
* free the fid.
|
|
|
|
*/
|
|
|
|
fidp->ref++;
|
2013-02-05 06:57:46 +01:00
|
|
|
err = put_fid(pdu, fidp);
|
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
|
|
|
}
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2010-04-29 14:14:57 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-12-21 08:07:23 +01:00
|
|
|
static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp,
|
|
|
|
uint64_t off, uint32_t max_count)
|
2010-04-29 14:14:56 +02:00
|
|
|
{
|
2011-12-14 09:19:13 +01:00
|
|
|
ssize_t err;
|
2011-05-20 22:46:31 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
int read_count;
|
|
|
|
int64_t xattr_len;
|
2010-04-29 14:14:56 +02:00
|
|
|
|
2011-05-20 22:46:31 +02:00
|
|
|
xattr_len = fidp->fs.xattr.len;
|
|
|
|
read_count = xattr_len - off;
|
|
|
|
if (read_count > max_count) {
|
|
|
|
read_count = max_count;
|
|
|
|
} else if (read_count < 0) {
|
|
|
|
/*
|
|
|
|
* read beyond XATTR value
|
|
|
|
*/
|
|
|
|
read_count = 0;
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "d", read_count);
|
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
offset += err;
|
|
|
|
err = v9fs_pack(pdu->elem.in_sg, pdu->elem.in_num, offset,
|
|
|
|
((char *)fidp->fs.xattr.value) + off,
|
|
|
|
read_count);
|
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
offset += err;
|
2011-05-20 22:46:31 +02:00
|
|
|
return offset;
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int v9fs_do_readdir_with_stat(V9fsPDU *pdu,
|
2011-12-21 08:07:23 +01:00
|
|
|
V9fsFidState *fidp, uint32_t max_count)
|
2010-04-29 14:14:56 +02:00
|
|
|
{
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsPath path;
|
2011-05-20 22:46:31 +02:00
|
|
|
V9fsStat v9stat;
|
|
|
|
int len, err = 0;
|
|
|
|
int32_t count = 0;
|
|
|
|
struct stat stbuf;
|
|
|
|
off_t saved_dir_pos;
|
2011-05-18 13:53:00 +02:00
|
|
|
struct dirent *dent, *result;
|
2010-04-29 14:14:56 +02:00
|
|
|
|
2011-05-20 22:46:31 +02:00
|
|
|
/* save the directory position */
|
2011-08-02 08:06:17 +02:00
|
|
|
saved_dir_pos = v9fs_co_telldir(pdu, fidp);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (saved_dir_pos < 0) {
|
|
|
|
return saved_dir_pos;
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
2011-05-18 13:53:00 +02:00
|
|
|
|
|
|
|
dent = g_malloc(sizeof(struct dirent));
|
|
|
|
|
2011-05-20 22:46:31 +02:00
|
|
|
while (1) {
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_init(&path);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_readdir_r(pdu, fidp, dent, &result);
|
2011-05-18 13:53:00 +02:00
|
|
|
if (err || !result) {
|
2011-05-20 22:46:31 +02:00
|
|
|
break;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &path, &stbuf);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
2011-05-20 22:46:31 +02:00
|
|
|
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
|
|
|
len = pdu_marshal(pdu, 11 + count, "S", &v9stat);
|
|
|
|
if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) {
|
|
|
|
/* Ran out of buffer. Set dir back to old position and return */
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_seekdir(pdu, fidp, saved_dir_pos);
|
2011-05-20 22:46:31 +02:00
|
|
|
v9fs_stat_free(&v9stat);
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&path);
|
2011-05-18 13:53:00 +02:00
|
|
|
g_free(dent);
|
2011-05-20 22:46:31 +02:00
|
|
|
return count;
|
|
|
|
}
|
|
|
|
count += len;
|
|
|
|
v9fs_stat_free(&v9stat);
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&path);
|
2011-05-20 22:46:31 +02:00
|
|
|
saved_dir_pos = dent->d_off;
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
|
|
|
out:
|
2011-05-18 13:53:00 +02:00
|
|
|
g_free(dent);
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&path);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
2011-05-20 22:46:31 +02:00
|
|
|
return count;
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
|
|
|
|
2011-12-21 08:07:22 +01:00
|
|
|
/*
|
|
|
|
* Create a QEMUIOVector for a sub-region of PDU iovecs
|
|
|
|
*
|
|
|
|
* @qiov: uninitialized QEMUIOVector
|
|
|
|
* @skip: number of bytes to skip from beginning of PDU
|
|
|
|
* @size: number of bytes to include
|
|
|
|
* @is_write: true - write, false - read
|
|
|
|
*
|
|
|
|
* The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up
|
|
|
|
* with qemu_iovec_destroy().
|
|
|
|
*/
|
|
|
|
static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu,
|
consolidate qemu_iovec_copy() and qemu_iovec_concat() and make them consistent
qemu_iovec_concat() is currently a wrapper for
qemu_iovec_copy(), use the former (with extra
"0" arg) in a few places where it is used.
Change skip argument of qemu_iovec_copy() from
uint64_t to size_t, since size of qiov itself
is size_t, so there's no way to skip larger
sizes. Rename it to soffset, to make it clear
that the offset is applied to src.
Also change the only usage of uint64_t in
hw/9pfs/virtio-9p.c, in v9fs_init_qiov_from_pdu() -
all callers of it actually uses size_t too,
not uint64_t.
One added restriction: as for all other iovec-related
functions, soffset must point inside src.
Order of argumens is already good:
qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
int c, size_t bytes)
vs:
qemu_iovec_concat(QEMUIOVector *dst,
QEMUIOVector *src,
size_t soffset, size_t sbytes)
(note soffset is after _src_ not dst, since it applies to src;
for memset it applies to qiov).
Note that in many places where this function is used,
the previous call is qemu_iovec_reset(), which means
many callers actually want copy (replacing dst content),
not concat. So we may want to add a wrapper like
qemu_iovec_copy() with the same arguments but which
calls qemu_iovec_reset() before _concat().
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-03-12 18:28:06 +01:00
|
|
|
size_t skip, size_t size,
|
2011-12-21 08:07:22 +01:00
|
|
|
bool is_write)
|
|
|
|
{
|
|
|
|
QEMUIOVector elem;
|
|
|
|
struct iovec *iov;
|
|
|
|
unsigned int niov;
|
|
|
|
|
|
|
|
if (is_write) {
|
|
|
|
iov = pdu->elem.out_sg;
|
|
|
|
niov = pdu->elem.out_num;
|
|
|
|
} else {
|
|
|
|
iov = pdu->elem.in_sg;
|
|
|
|
niov = pdu->elem.in_num;
|
|
|
|
}
|
|
|
|
|
|
|
|
qemu_iovec_init_external(&elem, iov, niov);
|
|
|
|
qemu_iovec_init(qiov, niov);
|
consolidate qemu_iovec_copy() and qemu_iovec_concat() and make them consistent
qemu_iovec_concat() is currently a wrapper for
qemu_iovec_copy(), use the former (with extra
"0" arg) in a few places where it is used.
Change skip argument of qemu_iovec_copy() from
uint64_t to size_t, since size of qiov itself
is size_t, so there's no way to skip larger
sizes. Rename it to soffset, to make it clear
that the offset is applied to src.
Also change the only usage of uint64_t in
hw/9pfs/virtio-9p.c, in v9fs_init_qiov_from_pdu() -
all callers of it actually uses size_t too,
not uint64_t.
One added restriction: as for all other iovec-related
functions, soffset must point inside src.
Order of argumens is already good:
qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
int c, size_t bytes)
vs:
qemu_iovec_concat(QEMUIOVector *dst,
QEMUIOVector *src,
size_t soffset, size_t sbytes)
(note soffset is after _src_ not dst, since it applies to src;
for memset it applies to qiov).
Note that in many places where this function is used,
the previous call is qemu_iovec_reset(), which means
many callers actually want copy (replacing dst content),
not concat. So we may want to add a wrapper like
qemu_iovec_copy() with the same arguments but which
calls qemu_iovec_reset() before _concat().
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-03-12 18:28:06 +01:00
|
|
|
qemu_iovec_concat(qiov, &elem, skip, size);
|
2011-12-21 08:07:22 +01:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_read(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2010-04-29 14:14:56 +02:00
|
|
|
int32_t fid;
|
2011-12-21 08:07:23 +01:00
|
|
|
uint64_t off;
|
2010-04-29 14:14:56 +02:00
|
|
|
ssize_t err = 0;
|
2011-05-20 22:46:31 +02:00
|
|
|
int32_t count = 0;
|
|
|
|
size_t offset = 7;
|
2011-12-21 08:07:23 +01:00
|
|
|
uint32_t max_count;
|
2011-05-20 22:46:31 +02:00
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:14:56 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count);
|
2011-05-18 14:08:07 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (fidp == NULL) {
|
2010-04-29 14:14:56 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
2011-05-20 22:46:31 +02:00
|
|
|
if (fidp->fid_type == P9_FID_DIR) {
|
2010-04-29 14:14:56 +02:00
|
|
|
|
2011-05-20 22:46:31 +02:00
|
|
|
if (off == 0) {
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_rewinddir(pdu, fidp);
|
2010-04-29 14:14:56 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
count = v9fs_do_readdir_with_stat(pdu, fidp, max_count);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (count < 0) {
|
|
|
|
err = count;
|
|
|
|
goto out;
|
2010-10-08 08:00:16 +02:00
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "d", count);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset + count;
|
2011-05-20 22:46:31 +02:00
|
|
|
} else if (fidp->fid_type == P9_FID_FILE) {
|
2011-12-21 08:07:22 +01:00
|
|
|
QEMUIOVector qiov_full;
|
|
|
|
QEMUIOVector qiov;
|
2011-05-20 22:46:31 +02:00
|
|
|
int32_t len;
|
|
|
|
|
2011-12-21 08:07:22 +01:00
|
|
|
v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false);
|
|
|
|
qemu_iovec_init(&qiov, qiov_full.niov);
|
2011-05-20 22:46:31 +02:00
|
|
|
do {
|
2011-12-21 08:07:22 +01:00
|
|
|
qemu_iovec_reset(&qiov);
|
consolidate qemu_iovec_copy() and qemu_iovec_concat() and make them consistent
qemu_iovec_concat() is currently a wrapper for
qemu_iovec_copy(), use the former (with extra
"0" arg) in a few places where it is used.
Change skip argument of qemu_iovec_copy() from
uint64_t to size_t, since size of qiov itself
is size_t, so there's no way to skip larger
sizes. Rename it to soffset, to make it clear
that the offset is applied to src.
Also change the only usage of uint64_t in
hw/9pfs/virtio-9p.c, in v9fs_init_qiov_from_pdu() -
all callers of it actually uses size_t too,
not uint64_t.
One added restriction: as for all other iovec-related
functions, soffset must point inside src.
Order of argumens is already good:
qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
int c, size_t bytes)
vs:
qemu_iovec_concat(QEMUIOVector *dst,
QEMUIOVector *src,
size_t soffset, size_t sbytes)
(note soffset is after _src_ not dst, since it applies to src;
for memset it applies to qiov).
Note that in many places where this function is used,
the previous call is qemu_iovec_reset(), which means
many callers actually want copy (replacing dst content),
not concat. So we may want to add a wrapper like
qemu_iovec_copy() with the same arguments but which
calls qemu_iovec_reset() before _concat().
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-03-12 18:28:06 +01:00
|
|
|
qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (0) {
|
2011-12-21 08:07:22 +01:00
|
|
|
print_sg(qiov.iov, qiov.niov);
|
2011-05-20 22:46:31 +02:00
|
|
|
}
|
|
|
|
/* Loop in case of EINTR */
|
|
|
|
do {
|
2011-12-21 08:07:22 +01:00
|
|
|
len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (len >= 0) {
|
|
|
|
off += len;
|
|
|
|
count += len;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
} while (len == -EINTR && !pdu->cancelled);
|
2011-05-20 22:46:31 +02:00
|
|
|
if (len < 0) {
|
|
|
|
/* IO error return the error */
|
|
|
|
err = len;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
} while (count < max_count && len > 0);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "d", count);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset + count;
|
2011-12-21 08:07:22 +01:00
|
|
|
qemu_iovec_destroy(&qiov);
|
|
|
|
qemu_iovec_destroy(&qiov_full);
|
2011-05-20 22:46:31 +02:00
|
|
|
} else if (fidp->fid_type == P9_FID_XATTR) {
|
|
|
|
err = v9fs_xattr_read(s, pdu, fidp, off, max_count);
|
2010-04-29 14:14:56 +02:00
|
|
|
} else {
|
|
|
|
err = -EINVAL;
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_read_return(pdu->tag, pdu->id, count, err);
|
2010-04-29 14:14:56 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2010-04-29 14:14:56 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-19 00:57:17 +02:00
|
|
|
static size_t v9fs_readdir_data_size(V9fsString *name)
|
2010-06-09 11:27:57 +02:00
|
|
|
{
|
2011-05-19 00:57:17 +02:00
|
|
|
/*
|
|
|
|
* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
|
|
|
* size of type (1) + size of name.size (2) + strlen(name.data)
|
|
|
|
*/
|
|
|
|
return 24 + v9fs_string_size(name);
|
2010-06-09 11:27:57 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int v9fs_do_readdir(V9fsPDU *pdu,
|
2011-05-19 00:57:17 +02:00
|
|
|
V9fsFidState *fidp, int32_t max_count)
|
2010-06-09 11:27:57 +02:00
|
|
|
{
|
|
|
|
size_t size;
|
2011-05-19 00:57:17 +02:00
|
|
|
V9fsQID qid;
|
|
|
|
V9fsString name;
|
|
|
|
int len, err = 0;
|
|
|
|
int32_t count = 0;
|
|
|
|
off_t saved_dir_pos;
|
2011-05-18 13:53:00 +02:00
|
|
|
struct dirent *dent, *result;
|
2010-06-09 11:27:57 +02:00
|
|
|
|
2011-05-19 00:57:17 +02:00
|
|
|
/* save the directory position */
|
2011-08-02 08:06:17 +02:00
|
|
|
saved_dir_pos = v9fs_co_telldir(pdu, fidp);
|
2011-05-19 00:57:17 +02:00
|
|
|
if (saved_dir_pos < 0) {
|
|
|
|
return saved_dir_pos;
|
|
|
|
}
|
2011-05-18 13:53:00 +02:00
|
|
|
|
|
|
|
dent = g_malloc(sizeof(struct dirent));
|
|
|
|
|
2011-05-19 00:57:17 +02:00
|
|
|
while (1) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_readdir_r(pdu, fidp, dent, &result);
|
2011-05-18 13:53:00 +02:00
|
|
|
if (err || !result) {
|
2011-05-19 00:57:17 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
v9fs_string_init(&name);
|
|
|
|
v9fs_string_sprintf(&name, "%s", dent->d_name);
|
|
|
|
if ((count + v9fs_readdir_data_size(&name)) > max_count) {
|
2010-06-09 11:27:57 +02:00
|
|
|
/* Ran out of buffer. Set dir back to old position and return */
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_seekdir(pdu, fidp, saved_dir_pos);
|
2011-05-19 00:57:17 +02:00
|
|
|
v9fs_string_free(&name);
|
2011-05-18 13:53:00 +02:00
|
|
|
g_free(dent);
|
2011-05-19 00:57:17 +02:00
|
|
|
return count;
|
2010-06-09 11:27:57 +02:00
|
|
|
}
|
2011-05-19 00:57:17 +02:00
|
|
|
/*
|
|
|
|
* Fill up just the path field of qid because the client uses
|
2010-06-09 11:27:57 +02:00
|
|
|
* only that. To fill the entire qid structure we will have
|
|
|
|
* to stat each dirent found, which is expensive
|
|
|
|
*/
|
2011-05-19 00:57:17 +02:00
|
|
|
size = MIN(sizeof(dent->d_ino), sizeof(qid.path));
|
|
|
|
memcpy(&qid.path, &dent->d_ino, size);
|
2010-06-09 11:27:57 +02:00
|
|
|
/* Fill the other fields with dummy values */
|
2011-05-19 00:57:17 +02:00
|
|
|
qid.type = 0;
|
|
|
|
qid.version = 0;
|
2010-06-09 11:27:57 +02:00
|
|
|
|
2011-05-19 00:57:17 +02:00
|
|
|
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
|
|
|
len = pdu_marshal(pdu, 11 + count, "Qqbs",
|
|
|
|
&qid, dent->d_off,
|
|
|
|
dent->d_type, &name);
|
2011-12-14 09:19:13 +01:00
|
|
|
if (len < 0) {
|
|
|
|
v9fs_co_seekdir(pdu, fidp, saved_dir_pos);
|
|
|
|
v9fs_string_free(&name);
|
|
|
|
g_free(dent);
|
|
|
|
return len;
|
|
|
|
}
|
2011-05-19 00:57:17 +02:00
|
|
|
count += len;
|
|
|
|
v9fs_string_free(&name);
|
|
|
|
saved_dir_pos = dent->d_off;
|
|
|
|
}
|
2011-05-18 13:53:00 +02:00
|
|
|
g_free(dent);
|
2011-05-19 00:57:17 +02:00
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
return count;
|
2010-06-09 11:27:57 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_readdir(void *opaque)
|
2010-06-09 11:27:57 +02:00
|
|
|
{
|
|
|
|
int32_t fid;
|
2011-05-19 00:57:17 +02:00
|
|
|
V9fsFidState *fidp;
|
|
|
|
ssize_t retval = 0;
|
2010-06-09 11:27:57 +02:00
|
|
|
size_t offset = 7;
|
2011-12-21 08:07:23 +01:00
|
|
|
uint64_t initial_offset;
|
|
|
|
int32_t count;
|
|
|
|
uint32_t max_count;
|
2011-05-19 00:57:17 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-06-09 11:27:57 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
retval = pdu_unmarshal(pdu, offset, "dqd", &fid,
|
|
|
|
&initial_offset, &max_count);
|
|
|
|
if (retval < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count);
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-18 14:08:07 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
retval = -EINVAL;
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
|
|
|
if (!fidp->fs.dir) {
|
2011-05-19 00:57:17 +02:00
|
|
|
retval = -EINVAL;
|
2010-06-09 11:27:57 +02:00
|
|
|
goto out;
|
|
|
|
}
|
2011-05-19 00:57:17 +02:00
|
|
|
if (initial_offset == 0) {
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_rewinddir(pdu, fidp);
|
2010-06-09 11:27:57 +02:00
|
|
|
} else {
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_seekdir(pdu, fidp, initial_offset);
|
2010-06-09 11:27:57 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
count = v9fs_do_readdir(pdu, fidp, max_count);
|
2011-05-19 00:57:17 +02:00
|
|
|
if (count < 0) {
|
|
|
|
retval = count;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
retval = pdu_marshal(pdu, offset, "d", count);
|
|
|
|
if (retval < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
retval += count + offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval);
|
2010-06-09 11:27:57 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-19 00:57:17 +02:00
|
|
|
complete_pdu(s, pdu, retval);
|
2010-06-09 11:27:57 +02:00
|
|
|
}
|
|
|
|
|
2011-05-08 08:59:31 +02:00
|
|
|
static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp,
|
2011-12-21 08:07:23 +01:00
|
|
|
uint64_t off, uint32_t count,
|
2011-05-08 08:59:31 +02:00
|
|
|
struct iovec *sg, int cnt)
|
2010-09-02 07:39:07 +02:00
|
|
|
{
|
|
|
|
int i, to_copy;
|
|
|
|
ssize_t err = 0;
|
|
|
|
int write_count;
|
|
|
|
int64_t xattr_len;
|
2011-05-08 08:59:31 +02:00
|
|
|
size_t offset = 7;
|
2010-09-02 07:39:07 +02:00
|
|
|
|
2011-05-08 08:59:31 +02:00
|
|
|
|
|
|
|
xattr_len = fidp->fs.xattr.len;
|
|
|
|
write_count = xattr_len - off;
|
|
|
|
if (write_count > count) {
|
|
|
|
write_count = count;
|
2010-09-02 07:39:07 +02:00
|
|
|
} else if (write_count < 0) {
|
|
|
|
/*
|
|
|
|
* write beyond XATTR value len specified in
|
|
|
|
* xattrcreate
|
|
|
|
*/
|
|
|
|
err = -ENOSPC;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "d", write_count);
|
|
|
|
if (err < 0) {
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-05-08 08:59:31 +02:00
|
|
|
fidp->fs.xattr.copied_len += write_count;
|
2010-09-02 07:39:07 +02:00
|
|
|
/*
|
|
|
|
* Now copy the content from sg list
|
|
|
|
*/
|
2011-05-08 08:59:31 +02:00
|
|
|
for (i = 0; i < cnt; i++) {
|
|
|
|
if (write_count > sg[i].iov_len) {
|
|
|
|
to_copy = sg[i].iov_len;
|
2010-09-02 07:39:07 +02:00
|
|
|
} else {
|
|
|
|
to_copy = write_count;
|
|
|
|
}
|
2011-05-08 08:59:31 +02:00
|
|
|
memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy);
|
2010-09-02 07:39:07 +02:00
|
|
|
/* updating vs->off since we are not using below */
|
2011-05-08 08:59:31 +02:00
|
|
|
off += to_copy;
|
2010-09-02 07:39:07 +02:00
|
|
|
write_count -= to_copy;
|
|
|
|
}
|
|
|
|
out:
|
2011-05-08 08:59:31 +02:00
|
|
|
return err;
|
2010-09-02 07:39:07 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_write(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2011-05-08 08:59:31 +02:00
|
|
|
ssize_t err;
|
|
|
|
int32_t fid;
|
2011-12-21 08:07:23 +01:00
|
|
|
uint64_t off;
|
|
|
|
uint32_t count;
|
2011-05-08 08:59:31 +02:00
|
|
|
int32_t len = 0;
|
|
|
|
int32_t total = 0;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsFidState *fidp;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2011-12-21 08:07:22 +01:00
|
|
|
QEMUIOVector qiov_full;
|
|
|
|
QEMUIOVector qiov;
|
2010-04-29 14:14:58 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count);
|
|
|
|
if (err < 0) {
|
|
|
|
return complete_pdu(s, pdu, err);
|
|
|
|
}
|
|
|
|
offset += err;
|
2011-12-21 08:07:22 +01:00
|
|
|
v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true);
|
|
|
|
trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov);
|
2011-05-18 14:08:07 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-08 08:59:31 +02:00
|
|
|
if (fidp == NULL) {
|
2010-04-29 14:14:58 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2011-05-08 08:59:31 +02:00
|
|
|
if (fidp->fid_type == P9_FID_FILE) {
|
|
|
|
if (fidp->fs.fd == -1) {
|
2010-09-02 07:39:07 +02:00
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-05-08 08:59:31 +02:00
|
|
|
} else if (fidp->fid_type == P9_FID_XATTR) {
|
2010-09-02 07:39:07 +02:00
|
|
|
/*
|
|
|
|
* setxattr operation
|
|
|
|
*/
|
2011-12-21 08:07:22 +01:00
|
|
|
err = v9fs_xattr_write(s, pdu, fidp, off, count,
|
|
|
|
qiov_full.iov, qiov_full.niov);
|
2011-05-08 08:59:31 +02:00
|
|
|
goto out;
|
2010-09-02 07:39:07 +02:00
|
|
|
} else {
|
2010-04-29 14:14:58 +02:00
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-21 08:07:22 +01:00
|
|
|
qemu_iovec_init(&qiov, qiov_full.niov);
|
2011-05-08 08:59:31 +02:00
|
|
|
do {
|
2011-12-21 08:07:22 +01:00
|
|
|
qemu_iovec_reset(&qiov);
|
consolidate qemu_iovec_copy() and qemu_iovec_concat() and make them consistent
qemu_iovec_concat() is currently a wrapper for
qemu_iovec_copy(), use the former (with extra
"0" arg) in a few places where it is used.
Change skip argument of qemu_iovec_copy() from
uint64_t to size_t, since size of qiov itself
is size_t, so there's no way to skip larger
sizes. Rename it to soffset, to make it clear
that the offset is applied to src.
Also change the only usage of uint64_t in
hw/9pfs/virtio-9p.c, in v9fs_init_qiov_from_pdu() -
all callers of it actually uses size_t too,
not uint64_t.
One added restriction: as for all other iovec-related
functions, soffset must point inside src.
Order of argumens is already good:
qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
int c, size_t bytes)
vs:
qemu_iovec_concat(QEMUIOVector *dst,
QEMUIOVector *src,
size_t soffset, size_t sbytes)
(note soffset is after _src_ not dst, since it applies to src;
for memset it applies to qiov).
Note that in many places where this function is used,
the previous call is qemu_iovec_reset(), which means
many callers actually want copy (replacing dst content),
not concat. So we may want to add a wrapper like
qemu_iovec_copy() with the same arguments but which
calls qemu_iovec_reset() before _concat().
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-03-12 18:28:06 +01:00
|
|
|
qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total);
|
2011-05-08 08:59:31 +02:00
|
|
|
if (0) {
|
2011-12-21 08:07:22 +01:00
|
|
|
print_sg(qiov.iov, qiov.niov);
|
2010-10-08 08:00:16 +02:00
|
|
|
}
|
2011-05-08 08:59:31 +02:00
|
|
|
/* Loop in case of EINTR */
|
|
|
|
do {
|
2011-12-21 08:07:22 +01:00
|
|
|
len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off);
|
2011-05-08 08:59:31 +02:00
|
|
|
if (len >= 0) {
|
|
|
|
off += len;
|
|
|
|
total += len;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
} while (len == -EINTR && !pdu->cancelled);
|
2011-05-08 08:59:31 +02:00
|
|
|
if (len < 0) {
|
|
|
|
/* IO error return the error */
|
|
|
|
err = len;
|
2011-12-21 08:07:22 +01:00
|
|
|
goto out_qiov;
|
2011-05-08 08:59:31 +02:00
|
|
|
}
|
|
|
|
} while (total < count && len > 0);
|
2011-12-21 08:07:22 +01:00
|
|
|
|
|
|
|
offset = 7;
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "d", total);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_write_return(pdu->tag, pdu->id, total, err);
|
2011-12-21 08:07:22 +01:00
|
|
|
out_qiov:
|
|
|
|
qemu_iovec_destroy(&qiov);
|
2010-04-29 14:14:58 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-12-21 08:07:22 +01:00
|
|
|
qemu_iovec_destroy(&qiov_full);
|
2011-05-08 08:59:31 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-08-08 20:26:50 +02:00
|
|
|
static void v9fs_create(void *opaque)
|
2010-06-09 15:44:28 +02:00
|
|
|
{
|
2011-08-08 20:26:50 +02:00
|
|
|
int32_t fid;
|
|
|
|
int err = 0;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsQID qid;
|
|
|
|
int32_t perm;
|
|
|
|
int8_t mode;
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsPath path;
|
2011-08-08 20:26:50 +02:00
|
|
|
struct stat stbuf;
|
|
|
|
V9fsString name;
|
|
|
|
V9fsString extension;
|
|
|
|
int iounit;
|
|
|
|
V9fsPDU *pdu = opaque;
|
2010-04-29 14:14:59 +02:00
|
|
|
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_init(&path);
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
v9fs_string_init(&extension);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name,
|
|
|
|
&perm, &mode, &extension);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode);
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:59 +02:00
|
|
|
}
|
2011-08-08 20:26:50 +02:00
|
|
|
if (perm & P9_STAT_MODE_DIR) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777,
|
2011-05-24 11:40:56 +02:00
|
|
|
fidp->uid, -1, &stbuf);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_opendir(pdu, fidp);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
fidp->fid_type = P9_FID_DIR;
|
|
|
|
} else if (perm & P9_STAT_MODE_SYMLINK) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_symlink(pdu, fidp, &name,
|
2011-05-24 11:40:56 +02:00
|
|
|
extension.data, -1 , &stbuf);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2011-08-08 20:26:50 +02:00
|
|
|
} else if (perm & P9_STAT_MODE_LINK) {
|
2011-09-09 11:44:18 +02:00
|
|
|
int32_t ofid = atoi(extension.data);
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsFidState *ofidp = get_fid(pdu, ofid);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (ofidp == NULL) {
|
2011-08-08 20:26:50 +02:00
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_link(pdu, ofidp, fidp, &name);
|
|
|
|
put_fid(pdu, ofidp);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
2011-09-09 11:44:18 +02:00
|
|
|
fidp->fid_type = P9_FID_NONE;
|
2011-08-08 20:26:50 +02:00
|
|
|
goto out;
|
2010-04-29 14:14:59 +02:00
|
|
|
}
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
|
2011-05-24 11:40:56 +02:00
|
|
|
if (err < 0) {
|
|
|
|
fidp->fid_type = P9_FID_NONE;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-08 20:26:50 +02:00
|
|
|
} else if (perm & P9_STAT_MODE_DEVICE) {
|
2010-04-29 14:14:59 +02:00
|
|
|
char ctype;
|
|
|
|
uint32_t major, minor;
|
|
|
|
mode_t nmode = 0;
|
|
|
|
|
2011-08-08 20:26:50 +02:00
|
|
|
if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) {
|
2010-04-29 14:14:59 +02:00
|
|
|
err = -errno;
|
2011-08-08 20:26:50 +02:00
|
|
|
goto out;
|
2010-04-29 14:14:59 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
switch (ctype) {
|
|
|
|
case 'c':
|
|
|
|
nmode = S_IFCHR;
|
|
|
|
break;
|
|
|
|
case 'b':
|
|
|
|
nmode = S_IFBLK;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
err = -EIO;
|
2011-08-08 20:26:50 +02:00
|
|
|
goto out;
|
|
|
|
}
|
2010-06-18 03:27:24 +02:00
|
|
|
|
2011-08-08 20:26:50 +02:00
|
|
|
nmode |= perm & 0777;
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
|
2011-05-24 11:40:56 +02:00
|
|
|
makedev(major, minor), nmode, &stbuf);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2011-08-08 20:26:50 +02:00
|
|
|
} else if (perm & P9_STAT_MODE_NAMED_PIPE) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
|
2011-05-24 11:40:56 +02:00
|
|
|
0, S_IFIFO | (perm & 0777), &stbuf);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2011-08-08 20:26:50 +02:00
|
|
|
} else if (perm & P9_STAT_MODE_SOCKET) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
|
2011-05-24 11:40:56 +02:00
|
|
|
0, S_IFSOCK | (perm & 0777), &stbuf);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9fs_path_copy(&fidp->path, &path);
|
2011-08-08 20:26:50 +02:00
|
|
|
} else {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_open2(pdu, fidp, &name, -1,
|
2011-05-24 11:40:56 +02:00
|
|
|
omode_to_uflags(mode)|O_CREAT, perm, &stbuf);
|
2011-08-08 20:26:50 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
fidp->fid_type = P9_FID_FILE;
|
2011-05-18 12:10:57 +02:00
|
|
|
fidp->open_flags = omode_to_uflags(mode);
|
|
|
|
if (fidp->open_flags & O_EXCL) {
|
|
|
|
/*
|
|
|
|
* We let the host file system do O_EXCL check
|
|
|
|
* We should not reclaim such fd
|
|
|
|
*/
|
|
|
|
fidp->flags |= FID_NON_RECLAIMABLE;
|
|
|
|
}
|
2010-04-29 14:14:59 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
iounit = get_iounit(pdu, &fidp->path);
|
2011-08-08 20:26:50 +02:00
|
|
|
stat_to_qid(&stbuf, &qid);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_create_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path, iounit);
|
2010-04-29 14:14:59 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-08-08 20:26:50 +02:00
|
|
|
complete_pdu(pdu->s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
|
|
|
v9fs_string_free(&extension);
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&path);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_symlink(void *opaque)
|
2010-06-09 23:02:08 +02:00
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
2011-08-08 20:30:01 +02:00
|
|
|
V9fsString name;
|
|
|
|
V9fsString symname;
|
|
|
|
V9fsFidState *dfidp;
|
|
|
|
V9fsQID qid;
|
|
|
|
struct stat stbuf;
|
2010-06-09 23:02:08 +02:00
|
|
|
int32_t dfid;
|
|
|
|
int err = 0;
|
|
|
|
gid_t gid;
|
2011-08-08 20:30:01 +02:00
|
|
|
size_t offset = 7;
|
2010-06-09 23:02:08 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
v9fs_string_init(&symname);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid);
|
2010-06-09 23:02:08 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
dfidp = get_fid(pdu, dfid);
|
2011-08-08 20:30:01 +02:00
|
|
|
if (dfidp == NULL) {
|
2010-06-09 23:02:08 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-09 23:02:08 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf);
|
2011-08-08 20:30:01 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
stat_to_qid(&stbuf, &qid);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Q", &qid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_symlink_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path);
|
2010-06-09 23:02:08 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, dfidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-08-08 20:30:01 +02:00
|
|
|
complete_pdu(pdu->s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
|
|
|
v9fs_string_free(&symname);
|
2010-06-09 23:02:08 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_flush(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2011-12-14 09:19:13 +01:00
|
|
|
ssize_t err;
|
2011-08-02 08:06:17 +02:00
|
|
|
int16_t tag;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsPDU *cancel_pdu;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2011-08-02 08:06:17 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "w", &tag);
|
|
|
|
if (err < 0) {
|
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
return;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_flush(pdu->tag, pdu->id, tag);
|
2011-08-02 08:06:17 +02:00
|
|
|
|
|
|
|
QLIST_FOREACH(cancel_pdu, &s->active_list, next) {
|
|
|
|
if (cancel_pdu->tag == tag) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (cancel_pdu) {
|
|
|
|
cancel_pdu->cancelled = 1;
|
|
|
|
/*
|
|
|
|
* Wait for pdu to complete.
|
|
|
|
*/
|
|
|
|
qemu_co_queue_wait(&cancel_pdu->complete);
|
|
|
|
cancel_pdu->cancelled = 0;
|
|
|
|
free_pdu(pdu->s, cancel_pdu);
|
|
|
|
}
|
2010-04-29 14:15:02 +02:00
|
|
|
complete_pdu(s, pdu, 7);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_link(void *opaque)
|
2010-06-09 20:21:15 +02:00
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-06-09 20:21:15 +02:00
|
|
|
int32_t dfid, oldfid;
|
|
|
|
V9fsFidState *dfidp, *oldfidp;
|
2011-11-29 09:52:38 +01:00
|
|
|
V9fsString name;
|
2010-06-09 20:21:15 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
int err = 0;
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data);
|
2010-06-09 20:21:15 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
dfidp = get_fid(pdu, dfid);
|
2010-06-09 20:21:15 +02:00
|
|
|
if (dfidp == NULL) {
|
2011-05-09 20:47:28 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-09 20:21:15 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
oldfidp = get_fid(pdu, oldfid);
|
2010-06-09 20:21:15 +02:00
|
|
|
if (oldfidp == NULL) {
|
2011-05-09 20:47:28 +02:00
|
|
|
err = -ENOENT;
|
2010-06-09 20:21:15 +02:00
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_link(pdu, oldfidp, dfidp, &name);
|
2011-05-09 20:47:28 +02:00
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
2010-06-09 20:21:15 +02:00
|
|
|
}
|
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, dfidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2010-06-09 20:21:15 +02:00
|
|
|
v9fs_string_free(&name);
|
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
}
|
|
|
|
|
2011-08-02 08:05:54 +02:00
|
|
|
/* Only works with path name based fid */
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_remove(void *opaque)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
2010-04-29 14:15:01 +02:00
|
|
|
int32_t fid;
|
|
|
|
int err = 0;
|
2011-08-08 20:20:20 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
2010-04-29 14:15:01 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_remove(pdu->tag, pdu->id, fid);
|
2010-04-29 14:15:01 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-08-08 20:20:20 +02:00
|
|
|
if (fidp == NULL) {
|
2010-04-29 14:15:01 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
2011-08-02 08:05:54 +02:00
|
|
|
/* if fs driver is not path based, return EOPNOTSUPP */
|
2011-10-12 17:29:18 +02:00
|
|
|
if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) {
|
2011-08-02 08:05:54 +02:00
|
|
|
err = -EOPNOTSUPP;
|
|
|
|
goto out_err;
|
|
|
|
}
|
2011-05-18 12:10:57 +02:00
|
|
|
/*
|
|
|
|
* IF the file is unlinked, we cannot reopen
|
|
|
|
* the file later. So don't reclaim fd
|
|
|
|
*/
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_mark_fids_unreclaim(pdu, &fidp->path);
|
2011-05-18 12:10:57 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out_err;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_remove(pdu, &fidp->path);
|
2011-08-08 20:20:20 +02:00
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
|
|
|
}
|
2011-05-18 12:10:57 +02:00
|
|
|
out_err:
|
2011-08-08 20:20:20 +02:00
|
|
|
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2011-05-18 14:08:07 +02:00
|
|
|
clunk_fid(pdu->s, fidp->fid);
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-08-08 20:20:20 +02:00
|
|
|
complete_pdu(pdu->s, pdu, err);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-09-09 11:37:01 +02:00
|
|
|
static void v9fs_unlinkat(void *opaque)
|
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
V9fsString name;
|
|
|
|
int32_t dfid, flags;
|
|
|
|
size_t offset = 7;
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsPath path;
|
2011-09-09 11:37:01 +02:00
|
|
|
V9fsFidState *dfidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
dfidp = get_fid(pdu, dfid);
|
2011-09-09 11:37:01 +02:00
|
|
|
if (dfidp == NULL) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* IF the file is unlinked, we cannot reopen
|
|
|
|
* the file later. So don't reclaim fd
|
|
|
|
*/
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_init(&path);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out_err;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_mark_fids_unreclaim(pdu, &path);
|
2011-09-09 11:37:01 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out_err;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags);
|
2011-09-09 11:37:01 +02:00
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
|
|
|
}
|
|
|
|
out_err:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, dfidp);
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&path);
|
2011-09-09 11:37:01 +02:00
|
|
|
out_nofid:
|
|
|
|
complete_pdu(pdu->s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
|
|
|
}
|
|
|
|
|
2011-09-09 11:44:18 +02:00
|
|
|
|
|
|
|
/* Only works with path name based fid */
|
2011-08-02 08:06:17 +02:00
|
|
|
static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp,
|
2011-05-07 12:31:33 +02:00
|
|
|
int32_t newdirfid, V9fsString *name)
|
2010-04-29 14:15:00 +02:00
|
|
|
{
|
2011-05-07 12:31:33 +02:00
|
|
|
char *end;
|
2010-06-22 08:59:41 +02:00
|
|
|
int err = 0;
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsPath new_path;
|
|
|
|
V9fsFidState *tfidp;
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsState *s = pdu->s;
|
2011-05-18 14:08:07 +02:00
|
|
|
V9fsFidState *dirfidp = NULL;
|
2010-06-22 08:59:41 +02:00
|
|
|
char *old_name, *new_name;
|
2010-04-29 14:15:00 +02:00
|
|
|
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_init(&new_path);
|
2011-05-07 12:31:33 +02:00
|
|
|
if (newdirfid != -1) {
|
2011-08-02 08:06:17 +02:00
|
|
|
dirfidp = get_fid(pdu, newdirfid);
|
2010-06-22 08:59:41 +02:00
|
|
|
if (dirfidp == NULL) {
|
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-22 08:59:41 +02:00
|
|
|
}
|
2010-09-02 07:39:06 +02:00
|
|
|
BUG_ON(dirfidp->fid_type != P9_FID_NONE);
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path);
|
2010-06-22 08:59:41 +02:00
|
|
|
} else {
|
2011-05-07 12:31:33 +02:00
|
|
|
old_name = fidp->path.data;
|
2010-04-29 14:15:00 +02:00
|
|
|
end = strrchr(old_name, '/');
|
|
|
|
if (end) {
|
|
|
|
end++;
|
|
|
|
} else {
|
|
|
|
end = old_name;
|
|
|
|
}
|
2011-08-21 05:09:37 +02:00
|
|
|
new_name = g_malloc0(end - old_name + name->size + 1);
|
2010-06-22 08:59:41 +02:00
|
|
|
strncat(new_name, old_name, end - old_name);
|
2011-05-07 12:31:33 +02:00
|
|
|
strncat(new_name + (end - old_name), name->data, name->size);
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_name_to_path(pdu, NULL, new_name, &new_path);
|
2011-09-09 11:44:18 +02:00
|
|
|
g_free(new_name);
|
2010-06-22 08:59:41 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_rename(pdu, &fidp->path, &new_path);
|
2011-09-09 11:44:18 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Fixup fid's pointing to the old name to
|
|
|
|
* start pointing to the new name
|
|
|
|
*/
|
|
|
|
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
|
|
|
if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) {
|
|
|
|
/* replace the name */
|
|
|
|
v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data));
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
|
|
|
}
|
2010-06-22 08:59:41 +02:00
|
|
|
out:
|
2011-05-18 14:08:07 +02:00
|
|
|
if (dirfidp) {
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, dirfidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
}
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_free(&new_path);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2010-06-22 08:59:41 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2011-08-02 08:05:54 +02:00
|
|
|
/* Only works with path name based fid */
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_rename(void *opaque)
|
2010-06-22 08:59:41 +02:00
|
|
|
{
|
|
|
|
int32_t fid;
|
|
|
|
ssize_t err = 0;
|
2011-05-07 12:31:33 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
V9fsString name;
|
|
|
|
int32_t newdirfid;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-06-22 08:59:41 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-07 12:31:33 +02:00
|
|
|
if (fidp == NULL) {
|
2010-06-22 08:59:41 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-22 08:59:41 +02:00
|
|
|
}
|
2011-05-07 12:31:33 +02:00
|
|
|
BUG_ON(fidp->fid_type != P9_FID_NONE);
|
2011-08-02 08:05:54 +02:00
|
|
|
/* if fs driver is not path based, return EOPNOTSUPP */
|
2011-10-12 17:29:18 +02:00
|
|
|
if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) {
|
2011-08-02 08:05:54 +02:00
|
|
|
err = -EOPNOTSUPP;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9fs_path_write_lock(s);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_complete_rename(pdu, fidp, newdirfid, &name);
|
2011-08-02 08:05:54 +02:00
|
|
|
v9fs_path_unlock(s);
|
2011-05-07 12:31:33 +02:00
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
|
|
|
}
|
2011-08-02 08:05:54 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-07 12:31:33 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
2010-06-22 08:59:41 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir,
|
2011-09-09 11:44:18 +02:00
|
|
|
V9fsString *old_name, V9fsPath *newdir,
|
|
|
|
V9fsString *new_name)
|
|
|
|
{
|
|
|
|
V9fsFidState *tfidp;
|
|
|
|
V9fsPath oldpath, newpath;
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsState *s = pdu->s;
|
2011-09-09 11:44:18 +02:00
|
|
|
|
|
|
|
|
|
|
|
v9fs_path_init(&oldpath);
|
|
|
|
v9fs_path_init(&newpath);
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath);
|
|
|
|
v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath);
|
2011-09-09 11:44:18 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Fixup fid's pointing to the old name to
|
|
|
|
* start pointing to the new name
|
|
|
|
*/
|
|
|
|
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
|
|
|
if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) {
|
|
|
|
/* replace the name */
|
|
|
|
v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
v9fs_path_free(&oldpath);
|
|
|
|
v9fs_path_free(&newpath);
|
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid,
|
2011-05-23 19:54:41 +02:00
|
|
|
V9fsString *old_name, int32_t newdirfid,
|
|
|
|
V9fsString *new_name)
|
|
|
|
{
|
|
|
|
int err = 0;
|
2011-08-02 08:06:17 +02:00
|
|
|
V9fsState *s = pdu->s;
|
2011-05-23 19:54:41 +02:00
|
|
|
V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL;
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
olddirfidp = get_fid(pdu, olddirfid);
|
2011-05-23 19:54:41 +02:00
|
|
|
if (olddirfidp == NULL) {
|
|
|
|
err = -ENOENT;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (newdirfid != -1) {
|
2011-08-02 08:06:17 +02:00
|
|
|
newdirfidp = get_fid(pdu, newdirfid);
|
2011-05-23 19:54:41 +02:00
|
|
|
if (newdirfidp == NULL) {
|
|
|
|
err = -ENOENT;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
} else {
|
2011-08-02 08:06:17 +02:00
|
|
|
newdirfidp = get_fid(pdu, olddirfid);
|
2011-05-23 19:54:41 +02:00
|
|
|
}
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name,
|
2011-09-09 11:44:18 +02:00
|
|
|
&newdirfidp->path, new_name);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
2011-05-23 19:54:41 +02:00
|
|
|
}
|
2011-10-12 17:29:18 +02:00
|
|
|
if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
|
2011-08-02 08:05:54 +02:00
|
|
|
/* Only for path based fid we need to do the below fixup */
|
2011-08-02 08:06:17 +02:00
|
|
|
v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name,
|
2011-08-02 08:05:54 +02:00
|
|
|
&newdirfidp->path, new_name);
|
|
|
|
}
|
2011-05-23 19:54:41 +02:00
|
|
|
out:
|
|
|
|
if (olddirfidp) {
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, olddirfidp);
|
2011-05-23 19:54:41 +02:00
|
|
|
}
|
|
|
|
if (newdirfidp) {
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, newdirfidp);
|
2011-05-23 19:54:41 +02:00
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void v9fs_renameat(void *opaque)
|
|
|
|
{
|
|
|
|
ssize_t err = 0;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
|
|
|
int32_t olddirfid, newdirfid;
|
|
|
|
V9fsString old_name, new_name;
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&old_name);
|
|
|
|
v9fs_string_init(&new_name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid,
|
|
|
|
&old_name, &newdirfid, &new_name);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_err;
|
|
|
|
}
|
2011-05-23 19:54:41 +02:00
|
|
|
|
2011-08-02 08:05:54 +02:00
|
|
|
v9fs_path_write_lock(s);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_complete_renameat(pdu, olddirfid,
|
|
|
|
&old_name, newdirfid, &new_name);
|
2011-08-02 08:05:54 +02:00
|
|
|
v9fs_path_unlock(s);
|
2011-05-23 19:54:41 +02:00
|
|
|
if (!err) {
|
|
|
|
err = offset;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
|
|
|
|
out_err:
|
2011-05-23 19:54:41 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
v9fs_string_free(&old_name);
|
|
|
|
v9fs_string_free(&new_name);
|
|
|
|
}
|
|
|
|
|
2011-05-08 09:36:04 +02:00
|
|
|
static void v9fs_wstat(void *opaque)
|
2010-04-29 14:15:00 +02:00
|
|
|
{
|
2011-05-08 09:36:04 +02:00
|
|
|
int32_t fid;
|
|
|
|
int err = 0;
|
|
|
|
int16_t unused;
|
|
|
|
V9fsStat v9stat;
|
|
|
|
size_t offset = 7;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-04-29 14:15:00 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_stat_init(&v9stat);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_wstat(pdu->tag, pdu->id, fid,
|
|
|
|
v9stat.mode, v9stat.atime, v9stat.mtime);
|
2011-05-18 14:08:07 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-08 09:36:04 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
/* do we need to sync the file? */
|
|
|
|
if (donttouch_stat(&v9stat)) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_fsync(pdu, fidp, 0);
|
2010-04-29 14:15:00 +02:00
|
|
|
goto out;
|
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
if (v9stat.mode != -1) {
|
|
|
|
uint32_t v9_mode;
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
|
2011-05-08 09:36:04 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
v9_mode = stat_to_v9mode(&stbuf);
|
|
|
|
if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
|
|
|
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
|
|
|
|
/* Attempting to change the type */
|
|
|
|
err = -EIO;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_chmod(pdu, &fidp->path,
|
2011-05-08 09:36:04 +02:00
|
|
|
v9mode_to_mode(v9stat.mode,
|
|
|
|
&v9stat.extension));
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (v9stat.mtime != -1 || v9stat.atime != -1) {
|
2010-06-09 15:44:38 +02:00
|
|
|
struct timespec times[2];
|
2011-05-08 09:36:04 +02:00
|
|
|
if (v9stat.atime != -1) {
|
|
|
|
times[0].tv_sec = v9stat.atime;
|
2010-06-09 15:44:38 +02:00
|
|
|
times[0].tv_nsec = 0;
|
|
|
|
} else {
|
|
|
|
times[0].tv_nsec = UTIME_OMIT;
|
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
if (v9stat.mtime != -1) {
|
|
|
|
times[1].tv_sec = v9stat.mtime;
|
2010-06-09 15:44:38 +02:00
|
|
|
times[1].tv_nsec = 0;
|
|
|
|
} else {
|
|
|
|
times[1].tv_nsec = UTIME_OMIT;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_utimensat(pdu, &fidp->path, times);
|
2011-05-08 09:36:04 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
if (v9stat.n_gid != -1 || v9stat.n_uid != -1) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid);
|
2011-05-08 09:36:04 +02:00
|
|
|
if (err < 0) {
|
2010-04-29 14:15:00 +02:00
|
|
|
goto out;
|
2011-05-08 09:36:04 +02:00
|
|
|
}
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
if (v9stat.name.size != 0) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name);
|
2011-05-08 09:36:04 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
if (v9stat.length != -1) {
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length);
|
2011-05-08 09:36:04 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2010-04-29 14:15:00 +02:00
|
|
|
}
|
2011-05-08 09:36:04 +02:00
|
|
|
err = offset;
|
2010-04-29 14:15:00 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-08 09:36:04 +02:00
|
|
|
v9fs_stat_free(&v9stat);
|
|
|
|
complete_pdu(s, pdu, err);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-05-19 01:04:01 +02:00
|
|
|
static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf)
|
|
|
|
{
|
|
|
|
uint32_t f_type;
|
|
|
|
uint32_t f_bsize;
|
|
|
|
uint64_t f_blocks;
|
|
|
|
uint64_t f_bfree;
|
|
|
|
uint64_t f_bavail;
|
|
|
|
uint64_t f_files;
|
|
|
|
uint64_t f_ffree;
|
|
|
|
uint64_t fsid_val;
|
|
|
|
uint32_t f_namelen;
|
|
|
|
size_t offset = 7;
|
2010-06-09 15:44:28 +02:00
|
|
|
int32_t bsize_factor;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* compute bsize factor based on host file system block size
|
|
|
|
* and client msize
|
|
|
|
*/
|
2011-05-19 01:04:01 +02:00
|
|
|
bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize;
|
2010-06-09 15:44:28 +02:00
|
|
|
if (!bsize_factor) {
|
|
|
|
bsize_factor = 1;
|
|
|
|
}
|
2011-05-19 01:04:01 +02:00
|
|
|
f_type = stbuf->f_type;
|
|
|
|
f_bsize = stbuf->f_bsize;
|
|
|
|
f_bsize *= bsize_factor;
|
2010-06-09 15:44:28 +02:00
|
|
|
/*
|
|
|
|
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
|
|
|
* adjust(divide) the number of blocks, free blocks and available
|
|
|
|
* blocks by bsize factor
|
|
|
|
*/
|
2011-05-19 01:04:01 +02:00
|
|
|
f_blocks = stbuf->f_blocks/bsize_factor;
|
|
|
|
f_bfree = stbuf->f_bfree/bsize_factor;
|
|
|
|
f_bavail = stbuf->f_bavail/bsize_factor;
|
|
|
|
f_files = stbuf->f_files;
|
|
|
|
f_ffree = stbuf->f_ffree;
|
|
|
|
fsid_val = (unsigned int) stbuf->f_fsid.__val[0] |
|
|
|
|
(unsigned long long)stbuf->f_fsid.__val[1] << 32;
|
|
|
|
f_namelen = stbuf->f_namelen;
|
2010-05-10 08:41:03 +02:00
|
|
|
|
2011-05-19 01:04:01 +02:00
|
|
|
return pdu_marshal(pdu, offset, "ddqqqqqqd",
|
|
|
|
f_type, f_bsize, f_blocks, f_bfree,
|
|
|
|
f_bavail, f_files, f_ffree,
|
|
|
|
fsid_val, f_namelen);
|
2010-05-10 08:41:03 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_statfs(void *opaque)
|
2010-05-10 08:41:03 +02:00
|
|
|
{
|
2011-05-19 01:04:01 +02:00
|
|
|
int32_t fid;
|
|
|
|
ssize_t retval = 0;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
struct statfs stbuf;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-05-10 08:41:03 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
retval = pdu_unmarshal(pdu, offset, "d", &fid);
|
|
|
|
if (retval < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-19 01:04:01 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
retval = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-05-10 08:41:03 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf);
|
2011-05-19 01:04:01 +02:00
|
|
|
if (retval < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
retval = v9fs_fill_statfs(s, pdu, &stbuf);
|
|
|
|
if (retval < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
retval += offset;
|
2010-05-10 08:41:03 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-19 01:04:01 +02:00
|
|
|
complete_pdu(s, pdu, retval);
|
2010-05-10 08:41:03 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_mknod(void *opaque)
|
2010-06-22 08:54:09 +02:00
|
|
|
{
|
2011-05-19 01:06:51 +02:00
|
|
|
|
|
|
|
int mode;
|
|
|
|
gid_t gid;
|
2010-06-22 08:54:09 +02:00
|
|
|
int32_t fid;
|
2011-05-19 01:06:51 +02:00
|
|
|
V9fsQID qid;
|
2010-06-22 08:54:09 +02:00
|
|
|
int err = 0;
|
|
|
|
int major, minor;
|
2011-05-19 01:06:51 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
V9fsString name;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-06-22 08:54:09 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode,
|
|
|
|
&major, &minor, &gid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor);
|
2010-06-22 08:54:09 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2010-06-22 08:54:09 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-22 08:54:09 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid,
|
2011-05-24 11:40:56 +02:00
|
|
|
makedev(major, minor), mode, &stbuf);
|
2011-05-19 01:06:51 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
stat_to_qid(&stbuf, &qid);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Q", &qid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_mknod_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path);
|
2010-06-22 08:54:09 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-19 01:06:51 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
2010-06-22 08:54:09 +02:00
|
|
|
}
|
|
|
|
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
/*
|
|
|
|
* Implement posix byte range locking code
|
|
|
|
* Server side handling of locking code is very simple, because 9p server in
|
|
|
|
* QEMU can handle only one client. And most of the lock handling
|
|
|
|
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
|
|
|
* do any thing in * qemu 9p server side lock code path.
|
|
|
|
* So when a TLOCK request comes, always return success
|
|
|
|
*/
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_lock(void *opaque)
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
{
|
2011-08-22 05:44:04 +02:00
|
|
|
int8_t status;
|
2011-12-14 09:19:13 +01:00
|
|
|
V9fsFlock flock;
|
2011-08-22 05:44:04 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
int32_t fid, err = 0;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
status = P9_LOCK_ERROR;
|
|
|
|
v9fs_string_init(&flock.client_id);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type,
|
|
|
|
&flock.flags, &flock.start, &flock.length,
|
|
|
|
&flock.proc_id, &flock.client_id);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_lock(pdu->tag, pdu->id, fid,
|
2011-12-14 09:19:13 +01:00
|
|
|
flock.type, flock.start, flock.length);
|
2011-10-12 15:41:25 +02:00
|
|
|
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
|
|
|
|
/* We support only block flag now (that too ignored currently) */
|
2011-12-14 09:19:13 +01:00
|
|
|
if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) {
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-08-22 05:44:04 +02:00
|
|
|
if (fidp == NULL) {
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
}
|
2011-10-25 08:40:40 +02:00
|
|
|
err = v9fs_co_fstat(pdu, fidp, &stbuf);
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-08-22 05:44:04 +02:00
|
|
|
status = P9_LOCK_SUCCESS;
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "b", status);
|
|
|
|
if (err > 0) {
|
|
|
|
err += offset;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_lock_return(pdu->tag, pdu->id, status);
|
2011-08-22 05:44:04 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_free(&flock.client_id);
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
}
|
|
|
|
|
2010-09-07 23:06:52 +02:00
|
|
|
/*
|
|
|
|
* When a TGETLOCK request comes, always return success because all lock
|
|
|
|
* handling is done by client's VFS layer.
|
|
|
|
*/
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_getlock(void *opaque)
|
2010-09-07 23:06:52 +02:00
|
|
|
{
|
2011-05-07 13:51:38 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
struct stat stbuf;
|
|
|
|
V9fsFidState *fidp;
|
2011-12-14 09:19:13 +01:00
|
|
|
V9fsGetlock glock;
|
2011-05-07 13:51:38 +02:00
|
|
|
int32_t fid, err = 0;
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-09-07 23:06:52 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&glock.client_id);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type,
|
|
|
|
&glock.start, &glock.length, &glock.proc_id,
|
|
|
|
&glock.client_id);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_getlock(pdu->tag, pdu->id, fid,
|
2011-12-14 09:19:13 +01:00
|
|
|
glock.type, glock.start, glock.length);
|
2011-10-12 15:41:25 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2011-05-07 13:51:38 +02:00
|
|
|
if (fidp == NULL) {
|
2010-09-07 23:06:52 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-09-07 23:06:52 +02:00
|
|
|
}
|
2011-10-25 08:40:40 +02:00
|
|
|
err = v9fs_co_fstat(pdu, fidp, &stbuf);
|
2010-09-07 23:06:52 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
glock.type = P9_LOCK_TYPE_UNLCK;
|
|
|
|
err = pdu_marshal(pdu, offset, "bqqds", glock.type,
|
|
|
|
glock.start, glock.length, glock.proc_id,
|
|
|
|
&glock.client_id);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
|
|
|
trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start,
|
|
|
|
glock.length, glock.proc_id);
|
2010-09-07 23:06:52 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-07 13:51:38 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_free(&glock.client_id);
|
2010-09-07 23:06:52 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_mkdir(void *opaque)
|
2010-06-22 08:55:22 +02:00
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
2011-08-08 20:16:14 +02:00
|
|
|
size_t offset = 7;
|
2010-06-22 08:55:22 +02:00
|
|
|
int32_t fid;
|
2011-08-08 20:16:14 +02:00
|
|
|
struct stat stbuf;
|
|
|
|
V9fsQID qid;
|
2011-05-24 11:40:56 +02:00
|
|
|
V9fsString name;
|
2010-06-22 08:55:22 +02:00
|
|
|
V9fsFidState *fidp;
|
|
|
|
gid_t gid;
|
|
|
|
int mode;
|
2011-08-08 20:16:14 +02:00
|
|
|
int err = 0;
|
2010-06-22 08:55:22 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid);
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2010-06-22 08:55:22 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-06-22 08:55:22 +02:00
|
|
|
}
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf);
|
2011-08-08 20:16:14 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
stat_to_qid(&stbuf, &qid);
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "Q", &qid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_mkdir_return(pdu->tag, pdu->id,
|
|
|
|
qid.type, qid.version, qid.path, err);
|
2010-06-22 08:55:22 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-08-08 20:16:14 +02:00
|
|
|
complete_pdu(pdu->s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
2010-06-22 08:55:22 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_xattrwalk(void *opaque)
|
2010-09-02 07:39:06 +02:00
|
|
|
{
|
2011-05-19 01:05:48 +02:00
|
|
|
int64_t size;
|
|
|
|
V9fsString name;
|
2010-09-02 07:39:06 +02:00
|
|
|
ssize_t err = 0;
|
2011-05-19 01:05:48 +02:00
|
|
|
size_t offset = 7;
|
2010-09-02 07:39:06 +02:00
|
|
|
int32_t fid, newfid;
|
2011-05-19 01:05:48 +02:00
|
|
|
V9fsFidState *file_fidp;
|
2011-05-18 14:08:07 +02:00
|
|
|
V9fsFidState *xattr_fidp = NULL;
|
2011-05-19 01:05:48 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-09-02 07:39:06 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data);
|
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
file_fidp = get_fid(pdu, fid);
|
2011-05-19 01:05:48 +02:00
|
|
|
if (file_fidp == NULL) {
|
2010-09-02 07:39:06 +02:00
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
2011-05-19 01:05:48 +02:00
|
|
|
xattr_fidp = alloc_fid(s, newfid);
|
|
|
|
if (xattr_fidp == NULL) {
|
2010-09-02 07:39:06 +02:00
|
|
|
err = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-09-09 11:44:18 +02:00
|
|
|
v9fs_path_copy(&xattr_fidp->path, &file_fidp->path);
|
2011-12-14 09:19:13 +01:00
|
|
|
if (name.data == NULL) {
|
2010-09-02 07:39:06 +02:00
|
|
|
/*
|
|
|
|
* listxattr request. Get the size first
|
|
|
|
*/
|
2011-08-02 08:06:17 +02:00
|
|
|
size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0);
|
2011-05-19 01:05:48 +02:00
|
|
|
if (size < 0) {
|
|
|
|
err = size;
|
2011-05-18 14:08:07 +02:00
|
|
|
clunk_fid(s, xattr_fidp->fid);
|
2011-05-19 01:05:48 +02:00
|
|
|
goto out;
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
2011-05-19 01:05:48 +02:00
|
|
|
/*
|
|
|
|
* Read the xattr value
|
|
|
|
*/
|
|
|
|
xattr_fidp->fs.xattr.len = size;
|
|
|
|
xattr_fidp->fid_type = P9_FID_XATTR;
|
|
|
|
xattr_fidp->fs.xattr.copied_len = -1;
|
|
|
|
if (size) {
|
2011-08-21 05:09:37 +02:00
|
|
|
xattr_fidp->fs.xattr.value = g_malloc(size);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_llistxattr(pdu, &xattr_fidp->path,
|
2011-05-19 01:05:48 +02:00
|
|
|
xattr_fidp->fs.xattr.value,
|
|
|
|
xattr_fidp->fs.xattr.len);
|
|
|
|
if (err < 0) {
|
2011-05-18 14:08:07 +02:00
|
|
|
clunk_fid(s, xattr_fidp->fid);
|
2011-05-19 01:05:48 +02:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "q", size);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2010-09-02 07:39:06 +02:00
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* specific xattr fid. We check for xattr
|
|
|
|
* presence also collect the xattr size
|
|
|
|
*/
|
2011-08-02 08:06:17 +02:00
|
|
|
size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path,
|
2011-05-19 01:05:48 +02:00
|
|
|
&name, NULL, 0);
|
|
|
|
if (size < 0) {
|
|
|
|
err = size;
|
2011-05-18 14:08:07 +02:00
|
|
|
clunk_fid(s, xattr_fidp->fid);
|
2011-05-19 01:05:48 +02:00
|
|
|
goto out;
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
2011-05-19 01:05:48 +02:00
|
|
|
/*
|
|
|
|
* Read the xattr value
|
|
|
|
*/
|
|
|
|
xattr_fidp->fs.xattr.len = size;
|
|
|
|
xattr_fidp->fid_type = P9_FID_XATTR;
|
|
|
|
xattr_fidp->fs.xattr.copied_len = -1;
|
|
|
|
if (size) {
|
2011-08-21 05:09:37 +02:00
|
|
|
xattr_fidp->fs.xattr.value = g_malloc(size);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path,
|
2011-05-19 01:05:48 +02:00
|
|
|
&name, xattr_fidp->fs.xattr.value,
|
|
|
|
xattr_fidp->fs.xattr.len);
|
|
|
|
if (err < 0) {
|
2011-05-18 14:08:07 +02:00
|
|
|
clunk_fid(s, xattr_fidp->fid);
|
2011-05-19 01:05:48 +02:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "q", size);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size);
|
2010-09-02 07:39:06 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, file_fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
if (xattr_fidp) {
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, xattr_fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
}
|
|
|
|
out_nofid:
|
2011-05-19 01:05:48 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
2010-09-02 07:39:06 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_xattrcreate(void *opaque)
|
2010-09-02 07:39:07 +02:00
|
|
|
{
|
|
|
|
int flags;
|
|
|
|
int32_t fid;
|
2011-05-19 01:06:26 +02:00
|
|
|
int64_t size;
|
2010-09-02 07:39:07 +02:00
|
|
|
ssize_t err = 0;
|
2011-05-19 01:06:26 +02:00
|
|
|
V9fsString name;
|
|
|
|
size_t offset = 7;
|
|
|
|
V9fsFidState *file_fidp;
|
|
|
|
V9fsFidState *xattr_fidp;
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
V9fsState *s = pdu->s;
|
2010-09-02 07:39:07 +02:00
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
v9fs_string_init(&name);
|
|
|
|
err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags);
|
2010-09-02 07:39:07 +02:00
|
|
|
|
2011-08-02 08:06:17 +02:00
|
|
|
file_fidp = get_fid(pdu, fid);
|
2011-05-19 01:06:26 +02:00
|
|
|
if (file_fidp == NULL) {
|
2010-09-02 07:39:07 +02:00
|
|
|
err = -EINVAL;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-09-02 07:39:07 +02:00
|
|
|
}
|
|
|
|
/* Make the file fid point to xattr */
|
2011-05-19 01:06:26 +02:00
|
|
|
xattr_fidp = file_fidp;
|
|
|
|
xattr_fidp->fid_type = P9_FID_XATTR;
|
|
|
|
xattr_fidp->fs.xattr.copied_len = 0;
|
|
|
|
xattr_fidp->fs.xattr.len = size;
|
|
|
|
xattr_fidp->fs.xattr.flags = flags;
|
|
|
|
v9fs_string_init(&xattr_fidp->fs.xattr.name);
|
|
|
|
v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name);
|
2013-01-22 11:07:56 +01:00
|
|
|
xattr_fidp->fs.xattr.value = g_malloc(size);
|
2011-05-19 01:06:26 +02:00
|
|
|
err = offset;
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, file_fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-05-19 01:06:26 +02:00
|
|
|
complete_pdu(s, pdu, err);
|
|
|
|
v9fs_string_free(&name);
|
2010-09-02 07:39:07 +02:00
|
|
|
}
|
2010-09-02 07:39:06 +02:00
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_readlink(void *opaque)
|
2010-09-14 11:38:25 +02:00
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
2011-08-08 20:06:41 +02:00
|
|
|
size_t offset = 7;
|
|
|
|
V9fsString target;
|
2010-09-14 11:38:25 +02:00
|
|
|
int32_t fid;
|
|
|
|
int err = 0;
|
|
|
|
V9fsFidState *fidp;
|
|
|
|
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
|
|
|
if (err < 0) {
|
|
|
|
goto out_nofid;
|
|
|
|
}
|
2011-10-12 15:41:25 +02:00
|
|
|
trace_v9fs_readlink(pdu->tag, pdu->id, fid);
|
2011-08-02 08:06:17 +02:00
|
|
|
fidp = get_fid(pdu, fid);
|
2010-09-14 11:38:25 +02:00
|
|
|
if (fidp == NULL) {
|
|
|
|
err = -ENOENT;
|
2011-05-18 14:08:07 +02:00
|
|
|
goto out_nofid;
|
2010-09-14 11:38:25 +02:00
|
|
|
}
|
|
|
|
|
2011-08-08 20:06:41 +02:00
|
|
|
v9fs_string_init(&target);
|
2011-08-02 08:06:17 +02:00
|
|
|
err = v9fs_co_readlink(pdu, &fidp->path, &target);
|
2011-08-08 20:06:41 +02:00
|
|
|
if (err < 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2011-12-14 09:19:13 +01:00
|
|
|
err = pdu_marshal(pdu, offset, "s", &target);
|
|
|
|
if (err < 0) {
|
|
|
|
v9fs_string_free(&target);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
err += offset;
|
2011-10-24 11:39:49 +02:00
|
|
|
trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data);
|
2011-08-08 20:06:41 +02:00
|
|
|
v9fs_string_free(&target);
|
2010-09-14 11:38:25 +02:00
|
|
|
out:
|
2011-08-02 08:06:17 +02:00
|
|
|
put_fid(pdu, fidp);
|
2011-05-18 14:08:07 +02:00
|
|
|
out_nofid:
|
2011-08-08 20:06:41 +02:00
|
|
|
complete_pdu(pdu->s, pdu, err);
|
2010-09-14 11:38:25 +02:00
|
|
|
}
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static CoroutineEntry *pdu_co_handlers[] = {
|
2010-06-09 11:27:57 +02:00
|
|
|
[P9_TREADDIR] = v9fs_readdir,
|
2010-05-10 08:41:03 +02:00
|
|
|
[P9_TSTATFS] = v9fs_statfs,
|
virtio-9p: getattr server implementation for 9P2000.L protocol.
SYNOPSIS
size[4] Tgetattr tag[2] fid[4] request_mask[8]
size[4] Rgetattr tag[2] lstat[n]
DESCRIPTION
The getattr transaction inquires about the file identified by fid.
request_mask is a bit mask that specifies which fields of the
stat structure is the client interested in.
The reply will contain a machine-independent directory entry,
laid out as follows:
st_result_mask[8]
Bit mask that indicates which fields in the stat structure
have been populated by the server
qid.type[1]
the type of the file (directory, etc.), represented as a bit
vector corresponding to the high 8 bits of the file's mode
word.
qid.vers[4]
version number for given path
qid.path[8]
the file server's unique identification for the file
st_mode[4]
Permission and flags
st_uid[4]
User id of owner
st_gid[4]
Group ID of owner
st_nlink[8]
Number of hard links
st_rdev[8]
Device ID (if special file)
st_size[8]
Size, in bytes
st_blksize[8]
Block size for file system IO
st_blocks[8]
Number of file system blocks allocated
st_atime_sec[8]
Time of last access, seconds
st_atime_nsec[8]
Time of last access, nanoseconds
st_mtime_sec[8]
Time of last modification, seconds
st_mtime_nsec[8]
Time of last modification, nanoseconds
st_ctime_sec[8]
Time of last status change, seconds
st_ctime_nsec[8]
Time of last status change, nanoseconds
st_btime_sec[8]
Time of creation (birth) of file, seconds
st_btime_nsec[8]
Time of creation (birth) of file, nanoseconds
st_gen[8]
Inode generation
st_data_version[8]
Data version number
request_mask and result_mask bit masks contain the following bits
#define P9_STATS_MODE 0x00000001ULL
#define P9_STATS_NLINK 0x00000002ULL
#define P9_STATS_UID 0x00000004ULL
#define P9_STATS_GID 0x00000008ULL
#define P9_STATS_RDEV 0x00000010ULL
#define P9_STATS_ATIME 0x00000020ULL
#define P9_STATS_MTIME 0x00000040ULL
#define P9_STATS_CTIME 0x00000080ULL
#define P9_STATS_INO 0x00000100ULL
#define P9_STATS_SIZE 0x00000200ULL
#define P9_STATS_BLOCKS 0x00000400ULL
#define P9_STATS_BTIME 0x00000800ULL
#define P9_STATS_GEN 0x00001000ULL
#define P9_STATS_DATA_VERSION 0x00002000ULL
#define P9_STATS_BASIC 0x000007ffULL
#define P9_STATS_ALL 0x00003fffULL
This patch implements the client side of getattr implementation for 9P2000.L.
It introduces a new structure p9_stat_dotl for getting Linux stat information
along with QID. The data layout is similar to stat structure in Linux user
space with the following major differences:
inode (st_ino) is not part of data. Instead qid is.
device (st_dev) is not part of data because this doesn't make sense on the
client.
All time variables are 64 bit wide on the wire. The kernel seems to use
32 bit variables for these variables. However, some of the architectures
have used 64 bit variables and glibc exposes 64 bit variables to user
space on some architectures. Hence to be on the safer side we have made
these 64 bit in the protocol. Refer to the comments in
include/asm-generic/stat.h
There are some additional fields: st_btime_sec, st_btime_nsec, st_gen,
st_data_version apart from the bitmask, st_result_mask. The bit mask
is filled by the server to indicate which stat fields have been
populated by the server. Currently there is no clean way for the
server to obtain these additional fields, so it sends back just the
basic fields.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
2010-07-20 08:14:41 +02:00
|
|
|
[P9_TGETATTR] = v9fs_getattr,
|
virtio-9p: Implement server side of setattr for 9P2000.L protocol.
SYNOPSIS
size[4] Tsetattr tag[2] attr[n]
size[4] Rsetattr tag[2]
DESCRIPTION
The setattr command changes some of the file status information.
attr resembles the iattr structure used in Linux kernel. It
specifies which status parameter is to be changed and to what
value. It is laid out as follows:
valid[4]
specifies which status information is to be changed. Possible
values are:
ATTR_MODE (1 << 0)
ATTR_UID (1 << 1)
ATTR_GID (1 << 2)
ATTR_SIZE (1 << 3)
ATTR_ATIME (1 << 4)
ATTR_MTIME (1 << 5)
ATTR_CTIME (1 << 5)
ATTR_ATIME_SET (1 << 7)
ATTR_MTIME_SET (1 << 8)
The last two bits represent whether the time information
is being sent by the client's user space. In the absense
of these bits the server always uses server's time.
mode[4]
File permission bits
uid[4]
Owner id of file
gid[4]
Group id of the file
size[8]
File size
atime_sec[8]
Time of last file access, seconds
atime_nsec[8]
Time of last file access, nanoseconds
mtime_sec[8]
Time of last file modification, seconds
mtime_nsec[8]
Time of last file modification, nanoseconds
Explanation of the patches:
--------------------------
*) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl
structure and passes it down to the client. The only check it has is calling
inode_change_ok()
*) The p9_iattr_dotl structure does not have ctime and ia_file parameters because
I don't think these are needed in our case. The client user space can request
updating just ctime by calling chown(fd, -1, -1). This is handled on server
side without a need for putting ctime on the wire.
*) The server currently supports changing mode, time, ownership and size of the
file.
*) 9P RFC says "Either all the changes in wstat request happen, or none of them
does: if the request succeeds, all changes were made; if it fails, none were."
I have not done anything to implement this specifically because I don't see
a reason.
[jvrao@linux.vnet.ibm.com: Parts of code for handling chown(-1,-1)
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-06-17 14:48:47 +02:00
|
|
|
[P9_TSETATTR] = v9fs_setattr,
|
2010-09-02 07:39:06 +02:00
|
|
|
[P9_TXATTRWALK] = v9fs_xattrwalk,
|
2010-09-02 07:39:07 +02:00
|
|
|
[P9_TXATTRCREATE] = v9fs_xattrcreate,
|
2010-06-22 08:54:09 +02:00
|
|
|
[P9_TMKNOD] = v9fs_mknod,
|
2010-06-22 08:59:41 +02:00
|
|
|
[P9_TRENAME] = v9fs_rename,
|
[virto-9p] Implement TLOCK
Synopsis
size[4] TLock tag[2] fid[4] flock[n]
size[4] RLock tag[2] status[1]
Description
Tlock is used to acquire/release byte range posix locks on a file
identified by given fid. The reply contains status of the lock request
flock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
flags[4] - Flags could be either of
P9_LOCK_FLAGS_BLOCK(1) - Blocked lock request, if there is a
conflicting lock exists, wait for that lock to be released.
P9_LOCK_FLAGS_RECLAIM(2) - Reclaim lock request, used when client is
trying to reclaim a lock after a server restrart (due to crash)
start[8] - Starting offset for lock
length[8] - Number of bytes to lock
If length is 0, lock all bytes starting at the location 'start'
through to the end of file
pid[4] - PID of the process that wants to take lock
client_id[4] - Unique client id
status[1] - Status of the lock request, can be
P9_LOCK_SUCCESS(0), P9_LOCK_BLOCKED(1), P9_LOCK_ERROR(2) or
P9_LOCK_GRACE(3)
P9_LOCK_SUCCESS - Request was successful
P9_LOCK_BLOCKED - A conflicting lock is held by another process
P9_LOCK_ERROR - Error while processing the lock request
P9_LOCK_GRACE - Server is in grace period, it can't accept new lock
requests in this period (except locks with
P9_LOCK_FLAGS_RECLAIM flag set)
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-09-07 22:49:32 +02:00
|
|
|
[P9_TLOCK] = v9fs_lock,
|
2010-09-07 23:06:52 +02:00
|
|
|
[P9_TGETLOCK] = v9fs_getlock,
|
2011-05-23 19:54:41 +02:00
|
|
|
[P9_TRENAMEAT] = v9fs_renameat,
|
2010-09-14 11:38:25 +02:00
|
|
|
[P9_TREADLINK] = v9fs_readlink,
|
2011-09-09 11:37:01 +02:00
|
|
|
[P9_TUNLINKAT] = v9fs_unlinkat,
|
2010-06-22 08:55:22 +02:00
|
|
|
[P9_TMKDIR] = v9fs_mkdir,
|
2010-04-29 14:14:44 +02:00
|
|
|
[P9_TVERSION] = v9fs_version,
|
2010-06-22 16:17:04 +02:00
|
|
|
[P9_TLOPEN] = v9fs_open,
|
2010-04-29 14:14:44 +02:00
|
|
|
[P9_TATTACH] = v9fs_attach,
|
|
|
|
[P9_TSTAT] = v9fs_stat,
|
|
|
|
[P9_TWALK] = v9fs_walk,
|
|
|
|
[P9_TCLUNK] = v9fs_clunk,
|
2010-09-23 02:18:33 +02:00
|
|
|
[P9_TFSYNC] = v9fs_fsync,
|
2010-04-29 14:14:44 +02:00
|
|
|
[P9_TOPEN] = v9fs_open,
|
|
|
|
[P9_TREAD] = v9fs_read,
|
|
|
|
#if 0
|
|
|
|
[P9_TAUTH] = v9fs_auth,
|
|
|
|
#endif
|
|
|
|
[P9_TFLUSH] = v9fs_flush,
|
2010-06-09 20:21:15 +02:00
|
|
|
[P9_TLINK] = v9fs_link,
|
2010-06-09 23:02:08 +02:00
|
|
|
[P9_TSYMLINK] = v9fs_symlink,
|
2010-04-29 14:14:44 +02:00
|
|
|
[P9_TCREATE] = v9fs_create,
|
2010-06-18 03:27:24 +02:00
|
|
|
[P9_TLCREATE] = v9fs_lcreate,
|
2010-04-29 14:14:44 +02:00
|
|
|
[P9_TWRITE] = v9fs_write,
|
|
|
|
[P9_TWSTAT] = v9fs_wstat,
|
|
|
|
[P9_TREMOVE] = v9fs_remove,
|
|
|
|
};
|
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
static void v9fs_op_not_supp(void *opaque)
|
2011-06-01 09:05:14 +02:00
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
complete_pdu(pdu->s, pdu, -EOPNOTSUPP);
|
2011-06-01 09:05:14 +02:00
|
|
|
}
|
|
|
|
|
2011-10-25 08:40:39 +02:00
|
|
|
static void v9fs_fs_ro(void *opaque)
|
|
|
|
{
|
|
|
|
V9fsPDU *pdu = opaque;
|
|
|
|
complete_pdu(pdu->s, pdu, -EROFS);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline bool is_read_only_op(V9fsPDU *pdu)
|
|
|
|
{
|
|
|
|
switch (pdu->id) {
|
|
|
|
case P9_TREADDIR:
|
|
|
|
case P9_TSTATFS:
|
|
|
|
case P9_TGETATTR:
|
|
|
|
case P9_TXATTRWALK:
|
|
|
|
case P9_TLOCK:
|
|
|
|
case P9_TGETLOCK:
|
|
|
|
case P9_TREADLINK:
|
|
|
|
case P9_TVERSION:
|
|
|
|
case P9_TLOPEN:
|
|
|
|
case P9_TATTACH:
|
|
|
|
case P9_TSTAT:
|
|
|
|
case P9_TWALK:
|
|
|
|
case P9_TCLUNK:
|
|
|
|
case P9_TFSYNC:
|
|
|
|
case P9_TOPEN:
|
|
|
|
case P9_TREAD:
|
|
|
|
case P9_TAUTH:
|
|
|
|
case P9_TFLUSH:
|
|
|
|
return 1;
|
|
|
|
default:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-04-29 14:14:44 +02:00
|
|
|
static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
|
|
|
|
{
|
2011-05-18 23:18:05 +02:00
|
|
|
Coroutine *co;
|
|
|
|
CoroutineEntry *handler;
|
2010-04-29 14:14:44 +02:00
|
|
|
|
2011-05-18 23:18:05 +02:00
|
|
|
if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) ||
|
|
|
|
(pdu_co_handlers[pdu->id] == NULL)) {
|
2011-06-01 09:05:14 +02:00
|
|
|
handler = v9fs_op_not_supp;
|
|
|
|
} else {
|
2011-05-18 23:18:05 +02:00
|
|
|
handler = pdu_co_handlers[pdu->id];
|
2011-06-01 09:05:14 +02:00
|
|
|
}
|
2011-10-25 08:40:39 +02:00
|
|
|
|
|
|
|
if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) {
|
|
|
|
handler = v9fs_fs_ro;
|
|
|
|
}
|
2011-05-18 23:18:05 +02:00
|
|
|
co = qemu_coroutine_create(handler);
|
|
|
|
qemu_coroutine_enter(co, pdu);
|
2010-04-29 14:14:44 +02:00
|
|
|
}
|
|
|
|
|
2011-06-01 09:05:13 +02:00
|
|
|
void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
|
2010-04-29 14:14:44 +02:00
|
|
|
{
|
|
|
|
V9fsState *s = (V9fsState *)vdev;
|
|
|
|
V9fsPDU *pdu;
|
|
|
|
ssize_t len;
|
|
|
|
|
|
|
|
while ((pdu = alloc_pdu(s)) &&
|
|
|
|
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
|
|
|
uint8_t *ptr;
|
2011-05-18 23:18:05 +02:00
|
|
|
pdu->s = s;
|
2010-04-29 14:14:44 +02:00
|
|
|
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
|
|
|
|
BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
|
|
|
|
|
|
|
|
ptr = pdu->elem.out_sg[0].iov_base;
|
|
|
|
|
2012-02-24 01:23:30 +01:00
|
|
|
pdu->size = le32_to_cpu(*(uint32_t *)ptr);
|
2010-04-29 14:14:44 +02:00
|
|
|
pdu->id = ptr[4];
|
2012-02-24 01:23:30 +01:00
|
|
|
pdu->tag = le16_to_cpu(*(uint16_t *)(ptr + 5));
|
2011-08-02 08:06:17 +02:00
|
|
|
qemu_co_queue_init(&pdu->complete);
|
2010-04-29 14:14:44 +02:00
|
|
|
submit_pdu(s, pdu);
|
|
|
|
}
|
|
|
|
free_pdu(s, pdu);
|
|
|
|
}
|
2011-05-18 12:10:57 +02:00
|
|
|
|
2013-02-04 15:37:49 +01:00
|
|
|
static void __attribute__((__constructor__)) virtio_9p_set_fd_limit(void)
|
2011-05-18 12:10:57 +02:00
|
|
|
{
|
|
|
|
struct rlimit rlim;
|
|
|
|
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
|
|
|
|
fprintf(stderr, "Failed to get the resource limit\n");
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3);
|
|
|
|
open_fd_rc = rlim.rlim_cur/2;
|
|
|
|
}
|