9f10751365
This patch doesn't implement the 9p protocol handling code. It adds a simple device which dump the protocol data. [jvrao@linux.vnet.ibm.com: Little-Endian to host format conversion] [aneesh.kumar@linux.vnet.ibm.com: Multiple-mounts support] Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
167 lines
3.0 KiB
C
167 lines
3.0 KiB
C
#ifndef _QEMU_VIRTIO_9P_H
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#define _QEMU_VIRTIO_9P_H
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/time.h>
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#include <utime.h>
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#include "file-op-9p.h"
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/* The feature bitmap for virtio 9P */
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/* The mount point is specified in a config variable */
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#define VIRTIO_9P_MOUNT_TAG 0
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enum {
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P9_TVERSION = 100,
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P9_RVERSION,
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P9_TAUTH = 102,
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P9_RAUTH,
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P9_TATTACH = 104,
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P9_RATTACH,
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P9_TERROR = 106,
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P9_RERROR,
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P9_TFLUSH = 108,
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P9_RFLUSH,
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P9_TWALK = 110,
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P9_RWALK,
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P9_TOPEN = 112,
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P9_ROPEN,
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P9_TCREATE = 114,
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P9_RCREATE,
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P9_TREAD = 116,
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P9_RREAD,
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P9_TWRITE = 118,
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P9_RWRITE,
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P9_TCLUNK = 120,
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P9_RCLUNK,
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P9_TREMOVE = 122,
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P9_RREMOVE,
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P9_TSTAT = 124,
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P9_RSTAT,
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P9_TWSTAT = 126,
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P9_RWSTAT,
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};
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/* qid.types */
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enum {
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P9_QTDIR = 0x80,
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P9_QTAPPEND = 0x40,
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P9_QTEXCL = 0x20,
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P9_QTMOUNT = 0x10,
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P9_QTAUTH = 0x08,
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P9_QTTMP = 0x04,
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P9_QTSYMLINK = 0x02,
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P9_QTLINK = 0x01,
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P9_QTFILE = 0x00,
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};
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#define P9_NOTAG (u16)(~0)
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#define P9_NOFID (u32)(~0)
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#define P9_MAXWELEM 16
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typedef struct V9fsPDU V9fsPDU;
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struct V9fsPDU
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{
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uint32_t size;
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uint16_t tag;
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uint8_t id;
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VirtQueueElement elem;
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QLIST_ENTRY(V9fsPDU) next;
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};
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/* FIXME
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* 1) change user needs to set groups and stuff
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*/
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/* from Linux's linux/virtio_9p.h */
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/* The ID for virtio console */
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#define VIRTIO_ID_9P 9
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#define MAX_REQ 128
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#define MAX_TAG_LEN 32
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#define BUG_ON(cond) assert(!(cond))
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typedef struct V9fsFidState V9fsFidState;
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typedef struct V9fsString
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{
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int16_t size;
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char *data;
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} V9fsString;
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typedef struct V9fsQID
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{
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int8_t type;
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int32_t version;
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int64_t path;
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} V9fsQID;
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typedef struct V9fsStat
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{
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int16_t size;
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int16_t type;
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int32_t dev;
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V9fsQID qid;
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int32_t mode;
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int32_t atime;
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int32_t mtime;
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int64_t length;
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V9fsString name;
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V9fsString uid;
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V9fsString gid;
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V9fsString muid;
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/* 9p2000.u */
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V9fsString extension;
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int32_t n_uid;
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int32_t n_gid;
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int32_t n_muid;
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} V9fsStat;
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struct V9fsFidState
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{
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int32_t fid;
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V9fsString path;
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int fd;
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DIR *dir;
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uid_t uid;
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V9fsFidState *next;
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};
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typedef struct V9fsState
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{
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VirtIODevice vdev;
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VirtQueue *vq;
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V9fsPDU pdus[MAX_REQ];
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QLIST_HEAD(, V9fsPDU) free_list;
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V9fsFidState *fid_list;
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FileOperations *ops;
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FsContext ctx;
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uint16_t tag_len;
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uint8_t *tag;
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size_t config_size;
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} V9fsState;
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struct virtio_9p_config
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{
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/* number of characters in tag */
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uint16_t tag_len;
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/* Variable size tag name */
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uint8_t tag[0];
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} __attribute__((packed));
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extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
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size_t offset, size_t size, int pack);
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static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
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size_t offset, size_t size)
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{
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return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
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}
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#endif
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