343 lines
7.0 KiB
C
343 lines
7.0 KiB
C
#ifndef _QEMU_9P_H
|
|
#define _QEMU_9P_H
|
|
|
|
#include <dirent.h>
|
|
#include <utime.h>
|
|
#include <sys/resource.h>
|
|
#include <glib.h>
|
|
#include "fsdev/file-op-9p.h"
|
|
#include "fsdev/9p-iov-marshal.h"
|
|
#include "qemu/thread.h"
|
|
#include "qemu/coroutine.h"
|
|
|
|
enum {
|
|
P9_TLERROR = 6,
|
|
P9_RLERROR,
|
|
P9_TSTATFS = 8,
|
|
P9_RSTATFS,
|
|
P9_TLOPEN = 12,
|
|
P9_RLOPEN,
|
|
P9_TLCREATE = 14,
|
|
P9_RLCREATE,
|
|
P9_TSYMLINK = 16,
|
|
P9_RSYMLINK,
|
|
P9_TMKNOD = 18,
|
|
P9_RMKNOD,
|
|
P9_TRENAME = 20,
|
|
P9_RRENAME,
|
|
P9_TREADLINK = 22,
|
|
P9_RREADLINK,
|
|
P9_TGETATTR = 24,
|
|
P9_RGETATTR,
|
|
P9_TSETATTR = 26,
|
|
P9_RSETATTR,
|
|
P9_TXATTRWALK = 30,
|
|
P9_RXATTRWALK,
|
|
P9_TXATTRCREATE = 32,
|
|
P9_RXATTRCREATE,
|
|
P9_TREADDIR = 40,
|
|
P9_RREADDIR,
|
|
P9_TFSYNC = 50,
|
|
P9_RFSYNC,
|
|
P9_TLOCK = 52,
|
|
P9_RLOCK,
|
|
P9_TGETLOCK = 54,
|
|
P9_RGETLOCK,
|
|
P9_TLINK = 70,
|
|
P9_RLINK,
|
|
P9_TMKDIR = 72,
|
|
P9_RMKDIR,
|
|
P9_TRENAMEAT = 74,
|
|
P9_RRENAMEAT,
|
|
P9_TUNLINKAT = 76,
|
|
P9_RUNLINKAT,
|
|
P9_TVERSION = 100,
|
|
P9_RVERSION,
|
|
P9_TAUTH = 102,
|
|
P9_RAUTH,
|
|
P9_TATTACH = 104,
|
|
P9_RATTACH,
|
|
P9_TERROR = 106,
|
|
P9_RERROR,
|
|
P9_TFLUSH = 108,
|
|
P9_RFLUSH,
|
|
P9_TWALK = 110,
|
|
P9_RWALK,
|
|
P9_TOPEN = 112,
|
|
P9_ROPEN,
|
|
P9_TCREATE = 114,
|
|
P9_RCREATE,
|
|
P9_TREAD = 116,
|
|
P9_RREAD,
|
|
P9_TWRITE = 118,
|
|
P9_RWRITE,
|
|
P9_TCLUNK = 120,
|
|
P9_RCLUNK,
|
|
P9_TREMOVE = 122,
|
|
P9_RREMOVE,
|
|
P9_TSTAT = 124,
|
|
P9_RSTAT,
|
|
P9_TWSTAT = 126,
|
|
P9_RWSTAT,
|
|
};
|
|
|
|
|
|
/* qid.types */
|
|
enum {
|
|
P9_QTDIR = 0x80,
|
|
P9_QTAPPEND = 0x40,
|
|
P9_QTEXCL = 0x20,
|
|
P9_QTMOUNT = 0x10,
|
|
P9_QTAUTH = 0x08,
|
|
P9_QTTMP = 0x04,
|
|
P9_QTSYMLINK = 0x02,
|
|
P9_QTLINK = 0x01,
|
|
P9_QTFILE = 0x00,
|
|
};
|
|
|
|
enum p9_proto_version {
|
|
V9FS_PROTO_2000U = 0x01,
|
|
V9FS_PROTO_2000L = 0x02,
|
|
};
|
|
|
|
#define P9_NOTAG (u16)(~0)
|
|
#define P9_NOFID (u32)(~0)
|
|
#define P9_MAXWELEM 16
|
|
|
|
#define FID_REFERENCED 0x1
|
|
#define FID_NON_RECLAIMABLE 0x2
|
|
static inline char *rpath(FsContext *ctx, const char *path)
|
|
{
|
|
return g_strdup_printf("%s/%s", ctx->fs_root, path);
|
|
}
|
|
|
|
/*
|
|
* ample room for Twrite/Rread header
|
|
* size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
|
|
*/
|
|
#define P9_IOHDRSZ 24
|
|
|
|
typedef struct V9fsPDU V9fsPDU;
|
|
struct V9fsState;
|
|
|
|
struct V9fsPDU
|
|
{
|
|
uint32_t size;
|
|
uint16_t tag;
|
|
uint8_t id;
|
|
uint8_t cancelled;
|
|
CoQueue complete;
|
|
struct V9fsState *s;
|
|
QLIST_ENTRY(V9fsPDU) next;
|
|
uint32_t idx;
|
|
};
|
|
|
|
|
|
/* FIXME
|
|
* 1) change user needs to set groups and stuff
|
|
*/
|
|
|
|
#define MAX_REQ 128
|
|
#define MAX_TAG_LEN 32
|
|
|
|
#define BUG_ON(cond) assert(!(cond))
|
|
|
|
typedef struct V9fsFidState V9fsFidState;
|
|
|
|
enum {
|
|
P9_FID_NONE = 0,
|
|
P9_FID_FILE,
|
|
P9_FID_DIR,
|
|
P9_FID_XATTR,
|
|
};
|
|
|
|
typedef struct V9fsConf
|
|
{
|
|
/* tag name for the device */
|
|
char *tag;
|
|
char *fsdev_id;
|
|
} V9fsConf;
|
|
|
|
typedef struct V9fsXattr
|
|
{
|
|
int64_t copied_len;
|
|
int64_t len;
|
|
void *value;
|
|
V9fsString name;
|
|
int flags;
|
|
} V9fsXattr;
|
|
|
|
typedef struct V9fsDir {
|
|
DIR *stream;
|
|
QemuMutex readdir_mutex;
|
|
} V9fsDir;
|
|
|
|
static inline void v9fs_readdir_lock(V9fsDir *dir)
|
|
{
|
|
qemu_mutex_lock(&dir->readdir_mutex);
|
|
}
|
|
|
|
static inline void v9fs_readdir_unlock(V9fsDir *dir)
|
|
{
|
|
qemu_mutex_unlock(&dir->readdir_mutex);
|
|
}
|
|
|
|
static inline void v9fs_readdir_init(V9fsDir *dir)
|
|
{
|
|
qemu_mutex_init(&dir->readdir_mutex);
|
|
}
|
|
|
|
/*
|
|
* Filled by fs driver on open and other
|
|
* calls.
|
|
*/
|
|
union V9fsFidOpenState {
|
|
int fd;
|
|
V9fsDir dir;
|
|
V9fsXattr xattr;
|
|
/*
|
|
* private pointer for fs drivers, that
|
|
* have its own internal representation of
|
|
* open files.
|
|
*/
|
|
void *private;
|
|
};
|
|
|
|
struct V9fsFidState
|
|
{
|
|
int fid_type;
|
|
int32_t fid;
|
|
V9fsPath path;
|
|
V9fsFidOpenState fs;
|
|
V9fsFidOpenState fs_reclaim;
|
|
int flags;
|
|
int open_flags;
|
|
uid_t uid;
|
|
int ref;
|
|
int clunked;
|
|
V9fsFidState *next;
|
|
V9fsFidState *rclm_lst;
|
|
};
|
|
|
|
typedef struct V9fsState
|
|
{
|
|
QLIST_HEAD(, V9fsPDU) free_list;
|
|
QLIST_HEAD(, V9fsPDU) active_list;
|
|
V9fsFidState *fid_list;
|
|
FileOperations *ops;
|
|
FsContext ctx;
|
|
char *tag;
|
|
enum p9_proto_version proto_version;
|
|
int32_t msize;
|
|
/*
|
|
* lock ensuring atomic path update
|
|
* on rename.
|
|
*/
|
|
CoRwlock rename_lock;
|
|
int32_t root_fid;
|
|
Error *migration_blocker;
|
|
V9fsConf fsconf;
|
|
} V9fsState;
|
|
|
|
/* 9p2000.L open flags */
|
|
#define P9_DOTL_RDONLY 00000000
|
|
#define P9_DOTL_WRONLY 00000001
|
|
#define P9_DOTL_RDWR 00000002
|
|
#define P9_DOTL_NOACCESS 00000003
|
|
#define P9_DOTL_CREATE 00000100
|
|
#define P9_DOTL_EXCL 00000200
|
|
#define P9_DOTL_NOCTTY 00000400
|
|
#define P9_DOTL_TRUNC 00001000
|
|
#define P9_DOTL_APPEND 00002000
|
|
#define P9_DOTL_NONBLOCK 00004000
|
|
#define P9_DOTL_DSYNC 00010000
|
|
#define P9_DOTL_FASYNC 00020000
|
|
#define P9_DOTL_DIRECT 00040000
|
|
#define P9_DOTL_LARGEFILE 00100000
|
|
#define P9_DOTL_DIRECTORY 00200000
|
|
#define P9_DOTL_NOFOLLOW 00400000
|
|
#define P9_DOTL_NOATIME 01000000
|
|
#define P9_DOTL_CLOEXEC 02000000
|
|
#define P9_DOTL_SYNC 04000000
|
|
|
|
/* 9p2000.L at flags */
|
|
#define P9_DOTL_AT_REMOVEDIR 0x200
|
|
|
|
/* 9P2000.L lock type */
|
|
#define P9_LOCK_TYPE_RDLCK 0
|
|
#define P9_LOCK_TYPE_WRLCK 1
|
|
#define P9_LOCK_TYPE_UNLCK 2
|
|
|
|
#define P9_LOCK_SUCCESS 0
|
|
#define P9_LOCK_BLOCKED 1
|
|
#define P9_LOCK_ERROR 2
|
|
#define P9_LOCK_GRACE 3
|
|
|
|
#define P9_LOCK_FLAGS_BLOCK 1
|
|
#define P9_LOCK_FLAGS_RECLAIM 2
|
|
|
|
typedef struct V9fsFlock
|
|
{
|
|
uint8_t type;
|
|
uint32_t flags;
|
|
uint64_t start; /* absolute offset */
|
|
uint64_t length;
|
|
uint32_t proc_id;
|
|
V9fsString client_id;
|
|
} V9fsFlock;
|
|
|
|
typedef struct V9fsGetlock
|
|
{
|
|
uint8_t type;
|
|
uint64_t start; /* absolute offset */
|
|
uint64_t length;
|
|
uint32_t proc_id;
|
|
V9fsString client_id;
|
|
} V9fsGetlock;
|
|
|
|
extern int open_fd_hw;
|
|
extern int total_open_fd;
|
|
|
|
static inline void v9fs_path_write_lock(V9fsState *s)
|
|
{
|
|
if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
|
|
qemu_co_rwlock_wrlock(&s->rename_lock);
|
|
}
|
|
}
|
|
|
|
static inline void v9fs_path_read_lock(V9fsState *s)
|
|
{
|
|
if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
|
|
qemu_co_rwlock_rdlock(&s->rename_lock);
|
|
}
|
|
}
|
|
|
|
static inline void v9fs_path_unlock(V9fsState *s)
|
|
{
|
|
if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
|
|
qemu_co_rwlock_unlock(&s->rename_lock);
|
|
}
|
|
}
|
|
|
|
static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu)
|
|
{
|
|
return pdu->cancelled;
|
|
}
|
|
|
|
extern void v9fs_reclaim_fd(V9fsPDU *pdu);
|
|
extern void v9fs_path_init(V9fsPath *path);
|
|
extern void v9fs_path_free(V9fsPath *path);
|
|
extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs);
|
|
extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
|
|
const char *name, V9fsPath *path);
|
|
extern int v9fs_device_realize_common(V9fsState *s, Error **errp);
|
|
extern void v9fs_device_unrealize_common(V9fsState *s, Error **errp);
|
|
|
|
ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
|
|
ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...);
|
|
V9fsPDU *pdu_alloc(V9fsState *s);
|
|
void pdu_free(V9fsPDU *pdu);
|
|
void pdu_submit(V9fsPDU *pdu);
|
|
|
|
#endif
|