1 #ifndef _QEMU_VIRTIO_9P_H
2 #define _QEMU_VIRTIO_9P_H
8 #include <sys/resource.h>
10 #include "fsdev/file-op-9p.h"
11 #include "qemu-thread.h"
12 #include "qemu-coroutine.h"
14 /* The feature bitmap for virtio 9P */
15 /* The mount point is specified in a config variable */
16 #define VIRTIO_9P_MOUNT_TAG 0
103 enum p9_proto_version
{
104 V9FS_PROTO_2000U
= 0x01,
105 V9FS_PROTO_2000L
= 0x02,
108 #define P9_NOTAG (u16)(~0)
109 #define P9_NOFID (u32)(~0)
110 #define P9_MAXWELEM 16
112 #define FID_REFERENCED 0x1
113 #define FID_NON_RECLAIMABLE 0x2
114 static inline const char *rpath(FsContext
*ctx
, const char *path
, char *buffer
)
116 snprintf(buffer
, PATH_MAX
, "%s/%s", ctx
->fs_root
, path
);
121 * ample room for Twrite/Rread header
122 * size[4] Tread/Twrite tag[2] fid[4] offset[8] count[4]
124 #define P9_IOHDRSZ 24
126 typedef struct V9fsPDU V9fsPDU
;
136 VirtQueueElement elem
;
138 QLIST_ENTRY(V9fsPDU
) next
;
143 * 1) change user needs to set groups and stuff
146 /* from Linux's linux/virtio_9p.h */
148 /* The ID for virtio console */
149 #define VIRTIO_ID_9P 9
151 #define MAX_TAG_LEN 32
153 #define BUG_ON(cond) assert(!(cond))
155 typedef struct V9fsFidState V9fsFidState
;
157 typedef struct V9fsString
163 typedef struct V9fsQID
170 typedef struct V9fsStat
185 V9fsString extension
;
198 typedef struct V9fsXattr
208 * Filled by fs driver on open and other
211 union V9fsFidOpenState
{
216 * private pointer for fs drivers, that
217 * have its own internal representation of
229 V9fsFidOpenState fs_reclaim
;
236 V9fsFidState
*rclm_lst
;
239 typedef struct V9fsState
243 V9fsPDU pdus
[MAX_REQ
];
244 QLIST_HEAD(, V9fsPDU
) free_list
;
245 QLIST_HEAD(, V9fsPDU
) active_list
;
246 V9fsFidState
*fid_list
;
252 enum p9_proto_version proto_version
;
255 * lock ensuring atomic path update
258 CoRwlock rename_lock
;
261 typedef struct V9fsStatState
{
269 typedef struct V9fsStatDotl
{
270 uint64_t st_result_mask
;
280 uint64_t st_atime_sec
;
281 uint64_t st_atime_nsec
;
282 uint64_t st_mtime_sec
;
283 uint64_t st_mtime_nsec
;
284 uint64_t st_ctime_sec
;
285 uint64_t st_ctime_nsec
;
286 uint64_t st_btime_sec
;
287 uint64_t st_btime_nsec
;
289 uint64_t st_data_version
;
292 typedef struct V9fsOpenState
{
302 typedef struct V9fsReadState
{
309 struct iovec iov
[128]; /* FIXME: bad, bad, bad */
321 typedef struct V9fsWriteState
{
329 struct iovec iov
[128]; /* FIXME: bad, bad, bad */
334 typedef struct V9fsIattr
347 struct virtio_9p_config
349 /* number of characters in tag */
351 /* Variable size tag name */
355 typedef struct V9fsMkState
{
364 /* 9p2000.L open flags */
365 #define P9_DOTL_RDONLY 00000000
366 #define P9_DOTL_WRONLY 00000001
367 #define P9_DOTL_RDWR 00000002
368 #define P9_DOTL_NOACCESS 00000003
369 #define P9_DOTL_CREATE 00000100
370 #define P9_DOTL_EXCL 00000200
371 #define P9_DOTL_NOCTTY 00000400
372 #define P9_DOTL_TRUNC 00001000
373 #define P9_DOTL_APPEND 00002000
374 #define P9_DOTL_NONBLOCK 00004000
375 #define P9_DOTL_DSYNC 00010000
376 #define P9_DOTL_FASYNC 00020000
377 #define P9_DOTL_DIRECT 00040000
378 #define P9_DOTL_LARGEFILE 00100000
379 #define P9_DOTL_DIRECTORY 00200000
380 #define P9_DOTL_NOFOLLOW 00400000
381 #define P9_DOTL_NOATIME 01000000
382 #define P9_DOTL_CLOEXEC 02000000
383 #define P9_DOTL_SYNC 04000000
385 /* 9p2000.L at flags */
386 #define P9_DOTL_AT_REMOVEDIR 0x200
388 /* 9P2000.L lock type */
389 #define P9_LOCK_TYPE_RDLCK 0
390 #define P9_LOCK_TYPE_WRLCK 1
391 #define P9_LOCK_TYPE_UNLCK 2
393 #define P9_LOCK_SUCCESS 0
394 #define P9_LOCK_BLOCKED 1
395 #define P9_LOCK_ERROR 2
396 #define P9_LOCK_GRACE 3
398 #define P9_LOCK_FLAGS_BLOCK 1
399 #define P9_LOCK_FLAGS_RECLAIM 2
401 typedef struct V9fsFlock
405 uint64_t start
; /* absolute offset */
408 V9fsString client_id
;
411 typedef struct V9fsGetlock
414 uint64_t start
; /* absolute offset */
417 V9fsString client_id
;
420 extern int open_fd_hw
;
421 extern int total_open_fd
;
423 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
424 size_t offset
, size_t size
, int pack
);
426 static inline size_t do_pdu_unpack(void *dst
, struct iovec
*sg
, int sg_count
,
427 size_t offset
, size_t size
)
429 return pdu_packunpack(dst
, sg
, sg_count
, offset
, size
, 0);
432 static inline void v9fs_path_write_lock(V9fsState
*s
)
434 if (s
->ctx
.export_flags
& V9FS_PATHNAME_FSCONTEXT
) {
435 qemu_co_rwlock_wrlock(&s
->rename_lock
);
439 static inline void v9fs_path_read_lock(V9fsState
*s
)
441 if (s
->ctx
.export_flags
& V9FS_PATHNAME_FSCONTEXT
) {
442 qemu_co_rwlock_rdlock(&s
->rename_lock
);
446 static inline void v9fs_path_unlock(V9fsState
*s
)
448 if (s
->ctx
.export_flags
& V9FS_PATHNAME_FSCONTEXT
) {
449 qemu_co_rwlock_unlock(&s
->rename_lock
);
453 static inline uint8_t v9fs_request_cancelled(V9fsPDU
*pdu
)
455 return pdu
->cancelled
;
458 extern void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
);
459 extern void virtio_9p_set_fd_limit(void);
460 extern void v9fs_reclaim_fd(V9fsPDU
*pdu
);
461 extern void v9fs_string_init(V9fsString
*str
);
462 extern void v9fs_string_free(V9fsString
*str
);
463 extern void v9fs_string_null(V9fsString
*str
);
464 extern void v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...);
465 extern void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
);
466 extern void v9fs_path_init(V9fsPath
*path
);
467 extern void v9fs_path_free(V9fsPath
*path
);
468 extern void v9fs_path_copy(V9fsPath
*lhs
, V9fsPath
*rhs
);
469 extern int v9fs_name_to_path(V9fsState
*s
, V9fsPath
*dirpath
,
470 const char *name
, V9fsPath
*path
);