4 * Copyright IBM, Corp. 2010
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
15 #include <glib/gprintf.h>
17 #include "hw/virtio.h"
19 #include "qemu_socket.h"
20 #include "hw/virtio-pci.h"
21 #include "virtio-9p.h"
22 #include "fsdev/qemu-fsdev.h"
23 #include "virtio-9p-xattr.h"
24 #include "virtio-9p-coth.h"
26 #include "migration.h"
30 static int open_fd_rc
;
44 static int omode_to_uflags(int8_t mode
)
78 struct dotl_openflag_map
{
83 static int dotl_to_open_flags(int flags
)
87 * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
88 * and P9_DOTL_NOACCESS
90 int oflags
= flags
& O_ACCMODE
;
92 struct dotl_openflag_map dotl_oflag_map
[] = {
93 { P9_DOTL_CREATE
, O_CREAT
},
94 { P9_DOTL_EXCL
, O_EXCL
},
95 { P9_DOTL_NOCTTY
, O_NOCTTY
},
96 { P9_DOTL_TRUNC
, O_TRUNC
},
97 { P9_DOTL_APPEND
, O_APPEND
},
98 { P9_DOTL_NONBLOCK
, O_NONBLOCK
} ,
99 { P9_DOTL_DSYNC
, O_DSYNC
},
100 { P9_DOTL_FASYNC
, FASYNC
},
101 { P9_DOTL_DIRECT
, O_DIRECT
},
102 { P9_DOTL_LARGEFILE
, O_LARGEFILE
},
103 { P9_DOTL_DIRECTORY
, O_DIRECTORY
},
104 { P9_DOTL_NOFOLLOW
, O_NOFOLLOW
},
105 { P9_DOTL_NOATIME
, O_NOATIME
},
106 { P9_DOTL_SYNC
, O_SYNC
},
109 for (i
= 0; i
< ARRAY_SIZE(dotl_oflag_map
); i
++) {
110 if (flags
& dotl_oflag_map
[i
].dotl_flag
) {
111 oflags
|= dotl_oflag_map
[i
].open_flag
;
118 void cred_init(FsCred
*credp
)
126 static int get_dotl_openflags(V9fsState
*s
, int oflags
)
130 * Filter the client open flags
132 flags
= dotl_to_open_flags(oflags
);
133 flags
&= ~(O_NOCTTY
| O_ASYNC
| O_CREAT
);
135 * Ignore direct disk access hint until the server supports it.
141 void v9fs_string_init(V9fsString
*str
)
147 void v9fs_string_free(V9fsString
*str
)
154 void v9fs_string_null(V9fsString
*str
)
156 v9fs_string_free(str
);
159 void GCC_FMT_ATTR(2, 3)
160 v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
164 v9fs_string_free(str
);
167 str
->size
= g_vasprintf(&str
->data
, fmt
, ap
);
171 void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
173 v9fs_string_free(lhs
);
174 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
177 void v9fs_path_init(V9fsPath
*path
)
183 void v9fs_path_free(V9fsPath
*path
)
190 void v9fs_path_copy(V9fsPath
*lhs
, V9fsPath
*rhs
)
193 lhs
->data
= g_malloc(rhs
->size
);
194 memcpy(lhs
->data
, rhs
->data
, rhs
->size
);
195 lhs
->size
= rhs
->size
;
198 int v9fs_name_to_path(V9fsState
*s
, V9fsPath
*dirpath
,
199 const char *name
, V9fsPath
*path
)
202 err
= s
->ops
->name_to_path(&s
->ctx
, dirpath
, name
, path
);
210 * Return TRUE if s1 is an ancestor of s2.
212 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
213 * As a special case, We treat s1 as ancestor of s2 if they are same!
215 static int v9fs_path_is_ancestor(V9fsPath
*s1
, V9fsPath
*s2
)
217 if (!strncmp(s1
->data
, s2
->data
, s1
->size
- 1)) {
218 if (s2
->data
[s1
->size
- 1] == '\0' || s2
->data
[s1
->size
- 1] == '/') {
225 static size_t v9fs_string_size(V9fsString
*str
)
231 * returns 0 if fid got re-opened, 1 if not, < 0 on error */
232 static int v9fs_reopen_fid(V9fsPDU
*pdu
, V9fsFidState
*f
)
235 if (f
->fid_type
== P9_FID_FILE
) {
236 if (f
->fs
.fd
== -1) {
238 err
= v9fs_co_open(pdu
, f
, f
->open_flags
);
239 } while (err
== -EINTR
&& !pdu
->cancelled
);
241 } else if (f
->fid_type
== P9_FID_DIR
) {
242 if (f
->fs
.dir
== NULL
) {
244 err
= v9fs_co_opendir(pdu
, f
);
245 } while (err
== -EINTR
&& !pdu
->cancelled
);
251 static V9fsFidState
*get_fid(V9fsPDU
*pdu
, int32_t fid
)
255 V9fsState
*s
= pdu
->s
;
257 for (f
= s
->fid_list
; f
; f
= f
->next
) {
261 * Update the fid ref upfront so that
262 * we don't get reclaimed when we yield
267 * check whether we need to reopen the
268 * file. We might have closed the fd
269 * while trying to free up some file
272 err
= v9fs_reopen_fid(pdu
, f
);
278 * Mark the fid as referenced so that the LRU
279 * reclaim won't close the file descriptor
281 f
->flags
|= FID_REFERENCED
;
288 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
292 for (f
= s
->fid_list
; f
; f
= f
->next
) {
293 /* If fid is already there return NULL */
299 f
= g_malloc0(sizeof(V9fsFidState
));
301 f
->fid_type
= P9_FID_NONE
;
304 * Mark the fid as referenced so that the LRU
305 * reclaim won't close the file descriptor
307 f
->flags
|= FID_REFERENCED
;
308 f
->next
= s
->fid_list
;
314 static int v9fs_xattr_fid_clunk(V9fsPDU
*pdu
, V9fsFidState
*fidp
)
318 if (fidp
->fs
.xattr
.copied_len
== -1) {
319 /* getxattr/listxattr fid */
323 * if this is fid for setxattr. clunk should
324 * result in setxattr localcall
326 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
327 /* clunk after partial write */
331 if (fidp
->fs
.xattr
.len
) {
332 retval
= v9fs_co_lsetxattr(pdu
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
333 fidp
->fs
.xattr
.value
,
335 fidp
->fs
.xattr
.flags
);
337 retval
= v9fs_co_lremovexattr(pdu
, &fidp
->path
, &fidp
->fs
.xattr
.name
);
340 v9fs_string_free(&fidp
->fs
.xattr
.name
);
342 if (fidp
->fs
.xattr
.value
) {
343 g_free(fidp
->fs
.xattr
.value
);
348 static int free_fid(V9fsPDU
*pdu
, V9fsFidState
*fidp
)
352 if (fidp
->fid_type
== P9_FID_FILE
) {
353 /* If we reclaimed the fd no need to close */
354 if (fidp
->fs
.fd
!= -1) {
355 retval
= v9fs_co_close(pdu
, &fidp
->fs
);
357 } else if (fidp
->fid_type
== P9_FID_DIR
) {
358 if (fidp
->fs
.dir
!= NULL
) {
359 retval
= v9fs_co_closedir(pdu
, &fidp
->fs
);
361 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
362 retval
= v9fs_xattr_fid_clunk(pdu
, fidp
);
364 v9fs_path_free(&fidp
->path
);
369 static void put_fid(V9fsPDU
*pdu
, V9fsFidState
*fidp
)
374 * Don't free the fid if it is in reclaim list
376 if (!fidp
->ref
&& fidp
->clunked
) {
377 if (fidp
->fid
== pdu
->s
->root_fid
) {
379 * if the clunked fid is root fid then we
380 * have unmounted the fs on the client side.
381 * delete the migration blocker. Ideally, this
382 * should be hooked to transport close notification
384 if (pdu
->s
->migration_blocker
) {
385 migrate_del_blocker(pdu
->s
->migration_blocker
);
386 error_free(pdu
->s
->migration_blocker
);
387 pdu
->s
->migration_blocker
= NULL
;
394 static V9fsFidState
*clunk_fid(V9fsState
*s
, int32_t fid
)
396 V9fsFidState
**fidpp
, *fidp
;
398 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
399 if ((*fidpp
)->fid
== fid
) {
403 if (*fidpp
== NULL
) {
412 void v9fs_reclaim_fd(V9fsPDU
*pdu
)
414 int reclaim_count
= 0;
415 V9fsState
*s
= pdu
->s
;
416 V9fsFidState
*f
, *reclaim_list
= NULL
;
418 for (f
= s
->fid_list
; f
; f
= f
->next
) {
420 * Unlink fids cannot be reclaimed. Check
421 * for them and skip them. Also skip fids
422 * currently being operated on.
424 if (f
->ref
|| f
->flags
& FID_NON_RECLAIMABLE
) {
428 * if it is a recently referenced fid
429 * we leave the fid untouched and clear the
430 * reference bit. We come back to it later
431 * in the next iteration. (a simple LRU without
432 * moving list elements around)
434 if (f
->flags
& FID_REFERENCED
) {
435 f
->flags
&= ~FID_REFERENCED
;
439 * Add fids to reclaim list.
441 if (f
->fid_type
== P9_FID_FILE
) {
442 if (f
->fs
.fd
!= -1) {
444 * Up the reference count so that
445 * a clunk request won't free this fid
448 f
->rclm_lst
= reclaim_list
;
450 f
->fs_reclaim
.fd
= f
->fs
.fd
;
454 } else if (f
->fid_type
== P9_FID_DIR
) {
455 if (f
->fs
.dir
!= NULL
) {
457 * Up the reference count so that
458 * a clunk request won't free this fid
461 f
->rclm_lst
= reclaim_list
;
463 f
->fs_reclaim
.dir
= f
->fs
.dir
;
468 if (reclaim_count
>= open_fd_rc
) {
473 * Now close the fid in reclaim list. Free them if they
474 * are already clunked.
476 while (reclaim_list
) {
478 reclaim_list
= f
->rclm_lst
;
479 if (f
->fid_type
== P9_FID_FILE
) {
480 v9fs_co_close(pdu
, &f
->fs_reclaim
);
481 } else if (f
->fid_type
== P9_FID_DIR
) {
482 v9fs_co_closedir(pdu
, &f
->fs_reclaim
);
486 * Now drop the fid reference, free it
493 static int v9fs_mark_fids_unreclaim(V9fsPDU
*pdu
, V9fsPath
*path
)
496 V9fsState
*s
= pdu
->s
;
497 V9fsFidState
*fidp
, head_fid
;
499 head_fid
.next
= s
->fid_list
;
500 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
501 if (fidp
->path
.size
!= path
->size
) {
504 if (!memcmp(fidp
->path
.data
, path
->data
, path
->size
)) {
505 /* Mark the fid non reclaimable. */
506 fidp
->flags
|= FID_NON_RECLAIMABLE
;
508 /* reopen the file/dir if already closed */
509 err
= v9fs_reopen_fid(pdu
, fidp
);
514 * Go back to head of fid list because
515 * the list could have got updated when
516 * switched to the worker thread
526 #define P9_QID_TYPE_DIR 0x80
527 #define P9_QID_TYPE_SYMLINK 0x02
529 #define P9_STAT_MODE_DIR 0x80000000
530 #define P9_STAT_MODE_APPEND 0x40000000
531 #define P9_STAT_MODE_EXCL 0x20000000
532 #define P9_STAT_MODE_MOUNT 0x10000000
533 #define P9_STAT_MODE_AUTH 0x08000000
534 #define P9_STAT_MODE_TMP 0x04000000
535 #define P9_STAT_MODE_SYMLINK 0x02000000
536 #define P9_STAT_MODE_LINK 0x01000000
537 #define P9_STAT_MODE_DEVICE 0x00800000
538 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
539 #define P9_STAT_MODE_SOCKET 0x00100000
540 #define P9_STAT_MODE_SETUID 0x00080000
541 #define P9_STAT_MODE_SETGID 0x00040000
542 #define P9_STAT_MODE_SETVTX 0x00010000
544 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
545 P9_STAT_MODE_SYMLINK | \
546 P9_STAT_MODE_LINK | \
547 P9_STAT_MODE_DEVICE | \
548 P9_STAT_MODE_NAMED_PIPE | \
551 /* This is the algorithm from ufs in spfs */
552 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
556 memset(&qidp
->path
, 0, sizeof(qidp
->path
));
557 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
558 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
559 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
561 if (S_ISDIR(stbuf
->st_mode
)) {
562 qidp
->type
|= P9_QID_TYPE_DIR
;
564 if (S_ISLNK(stbuf
->st_mode
)) {
565 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
569 static int fid_to_qid(V9fsPDU
*pdu
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
574 err
= v9fs_co_lstat(pdu
, &fidp
->path
, &stbuf
);
578 stat_to_qid(&stbuf
, qidp
);
582 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
586 if (!QLIST_EMPTY(&s
->free_list
)) {
587 pdu
= QLIST_FIRST(&s
->free_list
);
588 QLIST_REMOVE(pdu
, next
);
589 QLIST_INSERT_HEAD(&s
->active_list
, pdu
, next
);
594 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
598 * Cancelled pdu are added back to the freelist
601 if (!pdu
->cancelled
) {
602 QLIST_REMOVE(pdu
, next
);
603 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
608 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
609 size_t offset
, size_t size
, int pack
)
614 for (i
= 0; size
&& i
< sg_count
; i
++) {
616 if (offset
>= sg
[i
].iov_len
) {
618 offset
-= sg
[i
].iov_len
;
621 len
= MIN(sg
[i
].iov_len
- offset
, size
);
623 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
625 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
640 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
642 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
646 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
649 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
653 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
657 struct iovec
*src_sg
;
661 src_sg
= pdu
->elem
.in_sg
;
662 num
= pdu
->elem
.in_num
;
664 src_sg
= pdu
->elem
.out_sg
;
665 num
= pdu
->elem
.out_num
;
669 for (i
= 0; i
< num
; i
++) {
671 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
672 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
674 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
675 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
676 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
677 sg
[j
].iov_base
+= (offset
- pos
);
678 sg
[j
].iov_len
-= (offset
- pos
);
681 pos
+= src_sg
[i
].iov_len
;
687 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
689 size_t old_offset
= offset
;
694 for (i
= 0; fmt
[i
]; i
++) {
697 uint8_t *valp
= va_arg(ap
, uint8_t *);
698 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
703 valp
= va_arg(ap
, uint16_t *);
704 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
705 *valp
= le16_to_cpu(val
);
710 valp
= va_arg(ap
, uint32_t *);
711 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
712 *valp
= le32_to_cpu(val
);
717 valp
= va_arg(ap
, uint64_t *);
718 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
719 *valp
= le64_to_cpu(val
);
723 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
724 int *iovcnt
= va_arg(ap
, int *);
725 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
729 V9fsString
*str
= va_arg(ap
, V9fsString
*);
730 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
731 /* FIXME: sanity check str->size */
732 str
->data
= g_malloc(str
->size
+ 1);
733 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
734 str
->data
[str
->size
] = 0;
738 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
739 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
740 &qidp
->type
, &qidp
->version
, &qidp
->path
);
744 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
745 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
746 &statp
->size
, &statp
->type
, &statp
->dev
,
747 &statp
->qid
, &statp
->mode
, &statp
->atime
,
748 &statp
->mtime
, &statp
->length
,
749 &statp
->name
, &statp
->uid
, &statp
->gid
,
750 &statp
->muid
, &statp
->extension
,
751 &statp
->n_uid
, &statp
->n_gid
,
756 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
757 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
758 &iattr
->valid
, &iattr
->mode
,
759 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
760 &iattr
->atime_sec
, &iattr
->atime_nsec
,
761 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
771 return offset
- old_offset
;
774 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
776 size_t old_offset
= offset
;
781 for (i
= 0; fmt
[i
]; i
++) {
784 uint8_t val
= va_arg(ap
, int);
785 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
790 cpu_to_le16w(&val
, va_arg(ap
, int));
791 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
796 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
797 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
802 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
803 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
807 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
808 int *iovcnt
= va_arg(ap
, int *);
809 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
813 V9fsString
*str
= va_arg(ap
, V9fsString
*);
814 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
815 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
819 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
820 offset
+= pdu_marshal(pdu
, offset
, "bdq",
821 qidp
->type
, qidp
->version
, qidp
->path
);
825 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
826 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
827 statp
->size
, statp
->type
, statp
->dev
,
828 &statp
->qid
, statp
->mode
, statp
->atime
,
829 statp
->mtime
, statp
->length
, &statp
->name
,
830 &statp
->uid
, &statp
->gid
, &statp
->muid
,
831 &statp
->extension
, statp
->n_uid
,
832 statp
->n_gid
, statp
->n_muid
);
836 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
837 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
838 statp
->st_result_mask
,
839 &statp
->qid
, statp
->st_mode
,
840 statp
->st_uid
, statp
->st_gid
,
841 statp
->st_nlink
, statp
->st_rdev
,
842 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
843 statp
->st_atime_sec
, statp
->st_atime_nsec
,
844 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
845 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
846 statp
->st_btime_sec
, statp
->st_btime_nsec
,
847 statp
->st_gen
, statp
->st_data_version
);
856 return offset
- old_offset
;
859 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
861 int8_t id
= pdu
->id
+ 1; /* Response */
867 if (s
->proto_version
!= V9FS_PROTO_2000L
) {
870 str
.data
= strerror(err
);
871 str
.size
= strlen(str
.data
);
873 len
+= pdu_marshal(pdu
, len
, "s", &str
);
877 len
+= pdu_marshal(pdu
, len
, "d", err
);
879 if (s
->proto_version
== V9FS_PROTO_2000L
) {
882 trace_v9fs_rerror(pdu
->tag
, pdu
->id
, err
); /* Trace ERROR */
885 /* fill out the header */
886 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
888 /* keep these in sync */
892 /* push onto queue and notify */
893 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
895 /* FIXME: we should batch these completions */
896 virtio_notify(&s
->vdev
, s
->vq
);
898 /* Now wakeup anybody waiting in flush for this request */
899 qemu_co_queue_next(&pdu
->complete
);
904 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
909 if (mode
& P9_STAT_MODE_DIR
) {
913 if (mode
& P9_STAT_MODE_SYMLINK
) {
916 if (mode
& P9_STAT_MODE_SOCKET
) {
919 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
922 if (mode
& P9_STAT_MODE_DEVICE
) {
923 if (extension
&& extension
->data
[0] == 'c') {
934 if (mode
& P9_STAT_MODE_SETUID
) {
937 if (mode
& P9_STAT_MODE_SETGID
) {
940 if (mode
& P9_STAT_MODE_SETVTX
) {
947 static int donttouch_stat(V9fsStat
*stat
)
949 if (stat
->type
== -1 &&
951 stat
->qid
.type
== -1 &&
952 stat
->qid
.version
== -1 &&
953 stat
->qid
.path
== -1 &&
957 stat
->length
== -1 &&
964 stat
->n_muid
== -1) {
971 static void v9fs_stat_free(V9fsStat
*stat
)
973 v9fs_string_free(&stat
->name
);
974 v9fs_string_free(&stat
->uid
);
975 v9fs_string_free(&stat
->gid
);
976 v9fs_string_free(&stat
->muid
);
977 v9fs_string_free(&stat
->extension
);
980 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
984 mode
= stbuf
->st_mode
& 0777;
985 if (S_ISDIR(stbuf
->st_mode
)) {
986 mode
|= P9_STAT_MODE_DIR
;
989 if (S_ISLNK(stbuf
->st_mode
)) {
990 mode
|= P9_STAT_MODE_SYMLINK
;
993 if (S_ISSOCK(stbuf
->st_mode
)) {
994 mode
|= P9_STAT_MODE_SOCKET
;
997 if (S_ISFIFO(stbuf
->st_mode
)) {
998 mode
|= P9_STAT_MODE_NAMED_PIPE
;
1001 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
1002 mode
|= P9_STAT_MODE_DEVICE
;
1005 if (stbuf
->st_mode
& S_ISUID
) {
1006 mode
|= P9_STAT_MODE_SETUID
;
1009 if (stbuf
->st_mode
& S_ISGID
) {
1010 mode
|= P9_STAT_MODE_SETGID
;
1013 if (stbuf
->st_mode
& S_ISVTX
) {
1014 mode
|= P9_STAT_MODE_SETVTX
;
1020 static int stat_to_v9stat(V9fsPDU
*pdu
, V9fsPath
*name
,
1021 const struct stat
*stbuf
,
1027 memset(v9stat
, 0, sizeof(*v9stat
));
1029 stat_to_qid(stbuf
, &v9stat
->qid
);
1030 v9stat
->mode
= stat_to_v9mode(stbuf
);
1031 v9stat
->atime
= stbuf
->st_atime
;
1032 v9stat
->mtime
= stbuf
->st_mtime
;
1033 v9stat
->length
= stbuf
->st_size
;
1035 v9fs_string_null(&v9stat
->uid
);
1036 v9fs_string_null(&v9stat
->gid
);
1037 v9fs_string_null(&v9stat
->muid
);
1039 v9stat
->n_uid
= stbuf
->st_uid
;
1040 v9stat
->n_gid
= stbuf
->st_gid
;
1043 v9fs_string_null(&v9stat
->extension
);
1045 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
1046 err
= v9fs_co_readlink(pdu
, name
, &v9stat
->extension
);
1050 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
1051 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
1052 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
1053 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
1054 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
1055 v9fs_string_sprintf(&v9stat
->extension
, "%s %lu",
1056 "HARDLINKCOUNT", (unsigned long)stbuf
->st_nlink
);
1059 str
= strrchr(name
->data
, '/');
1066 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
1069 v9fs_string_size(&v9stat
->name
) +
1070 v9fs_string_size(&v9stat
->uid
) +
1071 v9fs_string_size(&v9stat
->gid
) +
1072 v9fs_string_size(&v9stat
->muid
) +
1073 v9fs_string_size(&v9stat
->extension
);
1077 #define P9_STATS_MODE 0x00000001ULL
1078 #define P9_STATS_NLINK 0x00000002ULL
1079 #define P9_STATS_UID 0x00000004ULL
1080 #define P9_STATS_GID 0x00000008ULL
1081 #define P9_STATS_RDEV 0x00000010ULL
1082 #define P9_STATS_ATIME 0x00000020ULL
1083 #define P9_STATS_MTIME 0x00000040ULL
1084 #define P9_STATS_CTIME 0x00000080ULL
1085 #define P9_STATS_INO 0x00000100ULL
1086 #define P9_STATS_SIZE 0x00000200ULL
1087 #define P9_STATS_BLOCKS 0x00000400ULL
1089 #define P9_STATS_BTIME 0x00000800ULL
1090 #define P9_STATS_GEN 0x00001000ULL
1091 #define P9_STATS_DATA_VERSION 0x00002000ULL
1093 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1094 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1097 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1098 V9fsStatDotl
*v9lstat
)
1100 memset(v9lstat
, 0, sizeof(*v9lstat
));
1102 v9lstat
->st_mode
= stbuf
->st_mode
;
1103 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1104 v9lstat
->st_uid
= stbuf
->st_uid
;
1105 v9lstat
->st_gid
= stbuf
->st_gid
;
1106 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1107 v9lstat
->st_size
= stbuf
->st_size
;
1108 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1109 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1110 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1111 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1112 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1113 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1114 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1115 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1116 /* Currently we only support BASIC fields in stat */
1117 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1119 stat_to_qid(stbuf
, &v9lstat
->qid
);
1122 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1124 while (len
&& *iovcnt
) {
1125 if (len
< sg
->iov_len
) {
1127 sg
->iov_base
+= len
;
1139 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1144 for (i
= 0; i
< *cnt
; i
++) {
1145 if ((total
+ sg
[i
].iov_len
) > cap
) {
1146 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1150 total
+= sg
[i
].iov_len
;
1158 static void print_sg(struct iovec
*sg
, int cnt
)
1162 printf("sg[%d]: {", cnt
);
1163 for (i
= 0; i
< cnt
; i
++) {
1167 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1172 /* Will call this only for path name based fid */
1173 static void v9fs_fix_path(V9fsPath
*dst
, V9fsPath
*src
, int len
)
1176 v9fs_path_init(&str
);
1177 v9fs_path_copy(&str
, dst
);
1178 v9fs_string_sprintf((V9fsString
*)dst
, "%s%s", src
->data
, str
.data
+len
);
1179 v9fs_path_free(&str
);
1180 /* +1 to include terminating NULL */
1184 static inline bool is_ro_export(FsContext
*ctx
)
1186 return ctx
->export_flags
& V9FS_RDONLY
;
1189 static void v9fs_version(void *opaque
)
1191 V9fsPDU
*pdu
= opaque
;
1192 V9fsState
*s
= pdu
->s
;
1196 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1197 trace_v9fs_version(pdu
->tag
, pdu
->id
, s
->msize
, version
.data
);
1199 if (!strcmp(version
.data
, "9P2000.u")) {
1200 s
->proto_version
= V9FS_PROTO_2000U
;
1201 } else if (!strcmp(version
.data
, "9P2000.L")) {
1202 s
->proto_version
= V9FS_PROTO_2000L
;
1204 v9fs_string_sprintf(&version
, "unknown");
1207 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1208 trace_v9fs_version_return(pdu
->tag
, pdu
->id
, s
->msize
, version
.data
);
1210 complete_pdu(s
, pdu
, offset
);
1212 v9fs_string_free(&version
);
1216 static void v9fs_attach(void *opaque
)
1218 V9fsPDU
*pdu
= opaque
;
1219 V9fsState
*s
= pdu
->s
;
1220 int32_t fid
, afid
, n_uname
;
1221 V9fsString uname
, aname
;
1227 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1228 trace_v9fs_attach(pdu
->tag
, pdu
->id
, fid
, afid
, uname
.data
, aname
.data
);
1230 fidp
= alloc_fid(s
, fid
);
1235 fidp
->uid
= n_uname
;
1236 err
= v9fs_co_name_to_path(pdu
, NULL
, "/", &fidp
->path
);
1242 err
= fid_to_qid(pdu
, fidp
, &qid
);
1248 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1250 trace_v9fs_attach_return(pdu
->tag
, pdu
->id
,
1251 qid
.type
, qid
.version
, qid
.path
);
1253 /* disable migration */
1254 error_set(&s
->migration_blocker
, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION
,
1255 s
->ctx
.fs_root
, s
->tag
);
1256 migrate_add_blocker(s
->migration_blocker
);
1260 complete_pdu(s
, pdu
, err
);
1261 v9fs_string_free(&uname
);
1262 v9fs_string_free(&aname
);
1265 static void v9fs_stat(void *opaque
)
1273 V9fsPDU
*pdu
= opaque
;
1274 V9fsState
*s
= pdu
->s
;
1276 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1277 trace_v9fs_stat(pdu
->tag
, pdu
->id
, fid
);
1279 fidp
= get_fid(pdu
, fid
);
1284 err
= v9fs_co_lstat(pdu
, &fidp
->path
, &stbuf
);
1288 err
= stat_to_v9stat(pdu
, &fidp
->path
, &stbuf
, &v9stat
);
1292 offset
+= pdu_marshal(pdu
, offset
, "wS", 0, &v9stat
);
1294 trace_v9fs_stat_return(pdu
->tag
, pdu
->id
, v9stat
.mode
,
1295 v9stat
.atime
, v9stat
.mtime
, v9stat
.length
);
1296 v9fs_stat_free(&v9stat
);
1300 complete_pdu(s
, pdu
, err
);
1303 static void v9fs_getattr(void *opaque
)
1310 uint64_t request_mask
;
1311 V9fsStatDotl v9stat_dotl
;
1312 V9fsPDU
*pdu
= opaque
;
1313 V9fsState
*s
= pdu
->s
;
1315 pdu_unmarshal(pdu
, offset
, "dq", &fid
, &request_mask
);
1316 trace_v9fs_getattr(pdu
->tag
, pdu
->id
, fid
, request_mask
);
1318 fidp
= get_fid(pdu
, fid
);
1324 * Currently we only support BASIC fields in stat, so there is no
1325 * need to look at request_mask.
1327 retval
= v9fs_co_lstat(pdu
, &fidp
->path
, &stbuf
);
1331 stat_to_v9stat_dotl(s
, &stbuf
, &v9stat_dotl
);
1333 /* fill st_gen if requested and supported by underlying fs */
1334 if (request_mask
& P9_STATS_GEN
) {
1335 retval
= v9fs_co_st_gen(pdu
, &fidp
->path
, stbuf
.st_mode
, &v9stat_dotl
);
1339 v9stat_dotl
.st_result_mask
|= P9_STATS_GEN
;
1342 retval
+= pdu_marshal(pdu
, offset
, "A", &v9stat_dotl
);
1343 trace_v9fs_getattr_return(pdu
->tag
, pdu
->id
, v9stat_dotl
.st_result_mask
,
1344 v9stat_dotl
.st_mode
, v9stat_dotl
.st_uid
,
1345 v9stat_dotl
.st_gid
);
1349 complete_pdu(s
, pdu
, retval
);
1352 /* From Linux kernel code */
1353 #define ATTR_MODE (1 << 0)
1354 #define ATTR_UID (1 << 1)
1355 #define ATTR_GID (1 << 2)
1356 #define ATTR_SIZE (1 << 3)
1357 #define ATTR_ATIME (1 << 4)
1358 #define ATTR_MTIME (1 << 5)
1359 #define ATTR_CTIME (1 << 6)
1360 #define ATTR_MASK 127
1361 #define ATTR_ATIME_SET (1 << 7)
1362 #define ATTR_MTIME_SET (1 << 8)
1364 static void v9fs_setattr(void *opaque
)
1371 V9fsPDU
*pdu
= opaque
;
1372 V9fsState
*s
= pdu
->s
;
1374 pdu_unmarshal(pdu
, offset
, "dI", &fid
, &v9iattr
);
1376 fidp
= get_fid(pdu
, fid
);
1381 if (v9iattr
.valid
& ATTR_MODE
) {
1382 err
= v9fs_co_chmod(pdu
, &fidp
->path
, v9iattr
.mode
);
1387 if (v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1388 struct timespec times
[2];
1389 if (v9iattr
.valid
& ATTR_ATIME
) {
1390 if (v9iattr
.valid
& ATTR_ATIME_SET
) {
1391 times
[0].tv_sec
= v9iattr
.atime_sec
;
1392 times
[0].tv_nsec
= v9iattr
.atime_nsec
;
1394 times
[0].tv_nsec
= UTIME_NOW
;
1397 times
[0].tv_nsec
= UTIME_OMIT
;
1399 if (v9iattr
.valid
& ATTR_MTIME
) {
1400 if (v9iattr
.valid
& ATTR_MTIME_SET
) {
1401 times
[1].tv_sec
= v9iattr
.mtime_sec
;
1402 times
[1].tv_nsec
= v9iattr
.mtime_nsec
;
1404 times
[1].tv_nsec
= UTIME_NOW
;
1407 times
[1].tv_nsec
= UTIME_OMIT
;
1409 err
= v9fs_co_utimensat(pdu
, &fidp
->path
, times
);
1415 * If the only valid entry in iattr is ctime we can call
1416 * chown(-1,-1) to update the ctime of the file
1418 if ((v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1419 ((v9iattr
.valid
& ATTR_CTIME
)
1420 && !((v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1421 if (!(v9iattr
.valid
& ATTR_UID
)) {
1424 if (!(v9iattr
.valid
& ATTR_GID
)) {
1427 err
= v9fs_co_chown(pdu
, &fidp
->path
, v9iattr
.uid
,
1433 if (v9iattr
.valid
& (ATTR_SIZE
)) {
1434 err
= v9fs_co_truncate(pdu
, &fidp
->path
, v9iattr
.size
);
1443 complete_pdu(s
, pdu
, err
);
1446 static int v9fs_walk_marshal(V9fsPDU
*pdu
, uint16_t nwnames
, V9fsQID
*qids
)
1450 offset
+= pdu_marshal(pdu
, offset
, "w", nwnames
);
1451 for (i
= 0; i
< nwnames
; i
++) {
1452 offset
+= pdu_marshal(pdu
, offset
, "Q", &qids
[i
]);
1457 static void v9fs_walk(void *opaque
)
1460 V9fsQID
*qids
= NULL
;
1462 V9fsPath dpath
, path
;
1466 int32_t fid
, newfid
;
1467 V9fsString
*wnames
= NULL
;
1469 V9fsFidState
*newfidp
= NULL
;;
1470 V9fsPDU
*pdu
= opaque
;
1471 V9fsState
*s
= pdu
->s
;
1473 offset
+= pdu_unmarshal(pdu
, offset
, "ddw", &fid
,
1476 trace_v9fs_walk(pdu
->tag
, pdu
->id
, fid
, newfid
, nwnames
);
1478 if (nwnames
&& nwnames
<= P9_MAXWELEM
) {
1479 wnames
= g_malloc0(sizeof(wnames
[0]) * nwnames
);
1480 qids
= g_malloc0(sizeof(qids
[0]) * nwnames
);
1481 for (i
= 0; i
< nwnames
; i
++) {
1482 offset
+= pdu_unmarshal(pdu
, offset
, "s", &wnames
[i
]);
1484 } else if (nwnames
> P9_MAXWELEM
) {
1488 fidp
= get_fid(pdu
, fid
);
1493 v9fs_path_init(&dpath
);
1494 v9fs_path_init(&path
);
1496 * Both dpath and path initially poin to fidp.
1497 * Needed to handle request with nwnames == 0
1499 v9fs_path_copy(&dpath
, &fidp
->path
);
1500 v9fs_path_copy(&path
, &fidp
->path
);
1501 for (name_idx
= 0; name_idx
< nwnames
; name_idx
++) {
1502 err
= v9fs_co_name_to_path(pdu
, &dpath
, wnames
[name_idx
].data
, &path
);
1506 err
= v9fs_co_lstat(pdu
, &path
, &stbuf
);
1510 stat_to_qid(&stbuf
, &qids
[name_idx
]);
1511 v9fs_path_copy(&dpath
, &path
);
1513 if (fid
== newfid
) {
1514 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
1515 v9fs_path_copy(&fidp
->path
, &path
);
1517 newfidp
= alloc_fid(s
, newfid
);
1518 if (newfidp
== NULL
) {
1522 newfidp
->uid
= fidp
->uid
;
1523 v9fs_path_copy(&newfidp
->path
, &path
);
1525 err
= v9fs_walk_marshal(pdu
, nwnames
, qids
);
1526 trace_v9fs_walk_return(pdu
->tag
, pdu
->id
, nwnames
, qids
);
1530 put_fid(pdu
, newfidp
);
1532 v9fs_path_free(&dpath
);
1533 v9fs_path_free(&path
);
1535 complete_pdu(s
, pdu
, err
);
1536 if (nwnames
&& nwnames
<= P9_MAXWELEM
) {
1537 for (name_idx
= 0; name_idx
< nwnames
; name_idx
++) {
1538 v9fs_string_free(&wnames
[name_idx
]);
1546 static int32_t get_iounit(V9fsPDU
*pdu
, V9fsPath
*path
)
1548 struct statfs stbuf
;
1550 V9fsState
*s
= pdu
->s
;
1553 * iounit should be multiples of f_bsize (host filesystem block size
1554 * and as well as less than (client msize - P9_IOHDRSZ))
1556 if (!v9fs_co_statfs(pdu
, path
, &stbuf
)) {
1557 iounit
= stbuf
.f_bsize
;
1558 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1561 iounit
= s
->msize
- P9_IOHDRSZ
;
1566 static void v9fs_open(void *opaque
)
1577 V9fsPDU
*pdu
= opaque
;
1578 V9fsState
*s
= pdu
->s
;
1580 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1581 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &mode
);
1583 pdu_unmarshal(pdu
, offset
, "db", &fid
, &mode
);
1585 trace_v9fs_open(pdu
->tag
, pdu
->id
, fid
, mode
);
1587 fidp
= get_fid(pdu
, fid
);
1592 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
1594 err
= v9fs_co_lstat(pdu
, &fidp
->path
, &stbuf
);
1598 stat_to_qid(&stbuf
, &qid
);
1599 if (S_ISDIR(stbuf
.st_mode
)) {
1600 err
= v9fs_co_opendir(pdu
, fidp
);
1604 fidp
->fid_type
= P9_FID_DIR
;
1605 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, 0);
1608 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1609 flags
= get_dotl_openflags(s
, mode
);
1611 flags
= omode_to_uflags(mode
);
1613 if (is_ro_export(&s
->ctx
)) {
1614 if (mode
& O_WRONLY
|| mode
& O_RDWR
||
1615 mode
& O_APPEND
|| mode
& O_TRUNC
) {
1621 err
= v9fs_co_open(pdu
, fidp
, flags
);
1625 fidp
->fid_type
= P9_FID_FILE
;
1626 fidp
->open_flags
= flags
;
1627 if (flags
& O_EXCL
) {
1629 * We let the host file system do O_EXCL check
1630 * We should not reclaim such fd
1632 fidp
->flags
|= FID_NON_RECLAIMABLE
;
1634 iounit
= get_iounit(pdu
, &fidp
->path
);
1635 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
1638 trace_v9fs_open_return(pdu
->tag
, pdu
->id
,
1639 qid
.type
, qid
.version
, qid
.path
, iounit
);
1643 complete_pdu(s
, pdu
, err
);
1646 static void v9fs_lcreate(void *opaque
)
1648 int32_t dfid
, flags
, mode
;
1657 V9fsPDU
*pdu
= opaque
;
1659 pdu_unmarshal(pdu
, offset
, "dsddd", &dfid
, &name
, &flags
,
1661 trace_v9fs_lcreate(pdu
->tag
, pdu
->id
, dfid
, flags
, mode
, gid
);
1663 fidp
= get_fid(pdu
, dfid
);
1669 flags
= get_dotl_openflags(pdu
->s
, flags
);
1670 err
= v9fs_co_open2(pdu
, fidp
, &name
, gid
,
1671 flags
| O_CREAT
, mode
, &stbuf
);
1675 fidp
->fid_type
= P9_FID_FILE
;
1676 fidp
->open_flags
= flags
;
1677 if (flags
& O_EXCL
) {
1679 * We let the host file system do O_EXCL check
1680 * We should not reclaim such fd
1682 fidp
->flags
|= FID_NON_RECLAIMABLE
;
1684 iounit
= get_iounit(pdu
, &fidp
->path
);
1685 stat_to_qid(&stbuf
, &qid
);
1686 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
1688 trace_v9fs_lcreate_return(pdu
->tag
, pdu
->id
,
1689 qid
.type
, qid
.version
, qid
.path
, iounit
);
1693 complete_pdu(pdu
->s
, pdu
, err
);
1694 v9fs_string_free(&name
);
1697 static void v9fs_fsync(void *opaque
)
1704 V9fsPDU
*pdu
= opaque
;
1705 V9fsState
*s
= pdu
->s
;
1707 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &datasync
);
1708 trace_v9fs_fsync(pdu
->tag
, pdu
->id
, fid
, datasync
);
1710 fidp
= get_fid(pdu
, fid
);
1715 err
= v9fs_co_fsync(pdu
, fidp
, datasync
);
1721 complete_pdu(s
, pdu
, err
);
1724 static void v9fs_clunk(void *opaque
)
1730 V9fsPDU
*pdu
= opaque
;
1731 V9fsState
*s
= pdu
->s
;
1733 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1734 trace_v9fs_clunk(pdu
->tag
, pdu
->id
, fid
);
1736 fidp
= clunk_fid(s
, fid
);
1742 * Bump the ref so that put_fid will
1750 complete_pdu(s
, pdu
, err
);
1753 static int v9fs_xattr_read(V9fsState
*s
, V9fsPDU
*pdu
,
1754 V9fsFidState
*fidp
, int64_t off
, int32_t max_count
)
1760 xattr_len
= fidp
->fs
.xattr
.len
;
1761 read_count
= xattr_len
- off
;
1762 if (read_count
> max_count
) {
1763 read_count
= max_count
;
1764 } else if (read_count
< 0) {
1766 * read beyond XATTR value
1770 offset
+= pdu_marshal(pdu
, offset
, "d", read_count
);
1771 offset
+= pdu_pack(pdu
, offset
,
1772 ((char *)fidp
->fs
.xattr
.value
) + off
,
1777 static int v9fs_do_readdir_with_stat(V9fsPDU
*pdu
,
1778 V9fsFidState
*fidp
, int32_t max_count
)
1785 off_t saved_dir_pos
;
1786 struct dirent
*dent
, *result
;
1788 /* save the directory position */
1789 saved_dir_pos
= v9fs_co_telldir(pdu
, fidp
);
1790 if (saved_dir_pos
< 0) {
1791 return saved_dir_pos
;
1794 dent
= g_malloc(sizeof(struct dirent
));
1797 v9fs_path_init(&path
);
1798 err
= v9fs_co_readdir_r(pdu
, fidp
, dent
, &result
);
1799 if (err
|| !result
) {
1802 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, dent
->d_name
, &path
);
1806 err
= v9fs_co_lstat(pdu
, &path
, &stbuf
);
1810 err
= stat_to_v9stat(pdu
, &path
, &stbuf
, &v9stat
);
1814 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
1815 len
= pdu_marshal(pdu
, 11 + count
, "S", &v9stat
);
1816 if ((len
!= (v9stat
.size
+ 2)) || ((count
+ len
) > max_count
)) {
1817 /* Ran out of buffer. Set dir back to old position and return */
1818 v9fs_co_seekdir(pdu
, fidp
, saved_dir_pos
);
1819 v9fs_stat_free(&v9stat
);
1820 v9fs_path_free(&path
);
1825 v9fs_stat_free(&v9stat
);
1826 v9fs_path_free(&path
);
1827 saved_dir_pos
= dent
->d_off
;
1831 v9fs_path_free(&path
);
1838 static void v9fs_read(void *opaque
)
1847 V9fsPDU
*pdu
= opaque
;
1848 V9fsState
*s
= pdu
->s
;
1850 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &off
, &max_count
);
1851 trace_v9fs_read(pdu
->tag
, pdu
->id
, fid
, off
, max_count
);
1853 fidp
= get_fid(pdu
, fid
);
1858 if (fidp
->fid_type
== P9_FID_DIR
) {
1861 v9fs_co_rewinddir(pdu
, fidp
);
1863 count
= v9fs_do_readdir_with_stat(pdu
, fidp
, max_count
);
1869 err
+= pdu_marshal(pdu
, offset
, "d", count
);
1871 } else if (fidp
->fid_type
== P9_FID_FILE
) {
1875 struct iovec iov
[128]; /* FIXME: bad, bad, bad */
1878 pdu_marshal(pdu
, offset
+ 4, "v", sg
, &cnt
);
1879 sg
= cap_sg(sg
, max_count
, &cnt
);
1884 /* Loop in case of EINTR */
1886 len
= v9fs_co_preadv(pdu
, fidp
, sg
, cnt
, off
);
1891 } while (len
== -EINTR
&& !pdu
->cancelled
);
1893 /* IO error return the error */
1897 sg
= adjust_sg(sg
, len
, &cnt
);
1898 } while (count
< max_count
&& len
> 0);
1900 err
+= pdu_marshal(pdu
, offset
, "d", count
);
1902 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
1903 err
= v9fs_xattr_read(s
, pdu
, fidp
, off
, max_count
);
1907 trace_v9fs_read_return(pdu
->tag
, pdu
->id
, count
, err
);
1911 complete_pdu(s
, pdu
, err
);
1914 static size_t v9fs_readdir_data_size(V9fsString
*name
)
1917 * Size of each dirent on the wire: size of qid (13) + size of offset (8)
1918 * size of type (1) + size of name.size (2) + strlen(name.data)
1920 return 24 + v9fs_string_size(name
);
1923 static int v9fs_do_readdir(V9fsPDU
*pdu
,
1924 V9fsFidState
*fidp
, int32_t max_count
)
1931 off_t saved_dir_pos
;
1932 struct dirent
*dent
, *result
;
1934 /* save the directory position */
1935 saved_dir_pos
= v9fs_co_telldir(pdu
, fidp
);
1936 if (saved_dir_pos
< 0) {
1937 return saved_dir_pos
;
1940 dent
= g_malloc(sizeof(struct dirent
));
1943 err
= v9fs_co_readdir_r(pdu
, fidp
, dent
, &result
);
1944 if (err
|| !result
) {
1947 v9fs_string_init(&name
);
1948 v9fs_string_sprintf(&name
, "%s", dent
->d_name
);
1949 if ((count
+ v9fs_readdir_data_size(&name
)) > max_count
) {
1950 /* Ran out of buffer. Set dir back to old position and return */
1951 v9fs_co_seekdir(pdu
, fidp
, saved_dir_pos
);
1952 v9fs_string_free(&name
);
1957 * Fill up just the path field of qid because the client uses
1958 * only that. To fill the entire qid structure we will have
1959 * to stat each dirent found, which is expensive
1961 size
= MIN(sizeof(dent
->d_ino
), sizeof(qid
.path
));
1962 memcpy(&qid
.path
, &dent
->d_ino
, size
);
1963 /* Fill the other fields with dummy values */
1967 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
1968 len
= pdu_marshal(pdu
, 11 + count
, "Qqbs",
1970 dent
->d_type
, &name
);
1972 v9fs_string_free(&name
);
1973 saved_dir_pos
= dent
->d_off
;
1982 static void v9fs_readdir(void *opaque
)
1988 int64_t initial_offset
;
1989 int32_t count
, max_count
;
1990 V9fsPDU
*pdu
= opaque
;
1991 V9fsState
*s
= pdu
->s
;
1993 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &initial_offset
, &max_count
);
1995 trace_v9fs_readdir(pdu
->tag
, pdu
->id
, fid
, initial_offset
, max_count
);
1997 fidp
= get_fid(pdu
, fid
);
2002 if (!fidp
->fs
.dir
) {
2006 if (initial_offset
== 0) {
2007 v9fs_co_rewinddir(pdu
, fidp
);
2009 v9fs_co_seekdir(pdu
, fidp
, initial_offset
);
2011 count
= v9fs_do_readdir(pdu
, fidp
, max_count
);
2017 retval
+= pdu_marshal(pdu
, offset
, "d", count
);
2019 trace_v9fs_readdir_return(pdu
->tag
, pdu
->id
, count
, retval
);
2023 complete_pdu(s
, pdu
, retval
);
2026 static int v9fs_xattr_write(V9fsState
*s
, V9fsPDU
*pdu
, V9fsFidState
*fidp
,
2027 int64_t off
, int32_t count
,
2028 struct iovec
*sg
, int cnt
)
2037 xattr_len
= fidp
->fs
.xattr
.len
;
2038 write_count
= xattr_len
- off
;
2039 if (write_count
> count
) {
2040 write_count
= count
;
2041 } else if (write_count
< 0) {
2043 * write beyond XATTR value len specified in
2049 offset
+= pdu_marshal(pdu
, offset
, "d", write_count
);
2051 fidp
->fs
.xattr
.copied_len
+= write_count
;
2053 * Now copy the content from sg list
2055 for (i
= 0; i
< cnt
; i
++) {
2056 if (write_count
> sg
[i
].iov_len
) {
2057 to_copy
= sg
[i
].iov_len
;
2059 to_copy
= write_count
;
2061 memcpy((char *)fidp
->fs
.xattr
.value
+ off
, sg
[i
].iov_base
, to_copy
);
2062 /* updating vs->off since we are not using below */
2064 write_count
-= to_copy
;
2070 static void v9fs_write(void *opaque
)
2081 struct iovec iov
[128]; /* FIXME: bad, bad, bad */
2082 struct iovec
*sg
= iov
;
2083 V9fsPDU
*pdu
= opaque
;
2084 V9fsState
*s
= pdu
->s
;
2086 pdu_unmarshal(pdu
, offset
, "dqdv", &fid
, &off
, &count
, sg
, &cnt
);
2087 trace_v9fs_write(pdu
->tag
, pdu
->id
, fid
, off
, count
, cnt
);
2089 fidp
= get_fid(pdu
, fid
);
2094 if (fidp
->fid_type
== P9_FID_FILE
) {
2095 if (fidp
->fs
.fd
== -1) {
2099 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
2101 * setxattr operation
2103 err
= v9fs_xattr_write(s
, pdu
, fidp
, off
, count
, sg
, cnt
);
2109 sg
= cap_sg(sg
, count
, &cnt
);
2114 /* Loop in case of EINTR */
2116 len
= v9fs_co_pwritev(pdu
, fidp
, sg
, cnt
, off
);
2121 } while (len
== -EINTR
&& !pdu
->cancelled
);
2123 /* IO error return the error */
2127 sg
= adjust_sg(sg
, len
, &cnt
);
2128 } while (total
< count
&& len
> 0);
2129 offset
+= pdu_marshal(pdu
, offset
, "d", total
);
2131 trace_v9fs_write_return(pdu
->tag
, pdu
->id
, total
, err
);
2135 complete_pdu(s
, pdu
, err
);
2138 static void v9fs_create(void *opaque
)
2150 V9fsString extension
;
2152 V9fsPDU
*pdu
= opaque
;
2154 v9fs_path_init(&path
);
2156 pdu_unmarshal(pdu
, offset
, "dsdbs", &fid
, &name
,
2157 &perm
, &mode
, &extension
);
2159 trace_v9fs_create(pdu
->tag
, pdu
->id
, fid
, name
.data
, perm
, mode
);
2161 fidp
= get_fid(pdu
, fid
);
2166 if (perm
& P9_STAT_MODE_DIR
) {
2167 err
= v9fs_co_mkdir(pdu
, fidp
, &name
, perm
& 0777,
2168 fidp
->uid
, -1, &stbuf
);
2172 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, name
.data
, &path
);
2176 v9fs_path_copy(&fidp
->path
, &path
);
2177 err
= v9fs_co_opendir(pdu
, fidp
);
2181 fidp
->fid_type
= P9_FID_DIR
;
2182 } else if (perm
& P9_STAT_MODE_SYMLINK
) {
2183 err
= v9fs_co_symlink(pdu
, fidp
, &name
,
2184 extension
.data
, -1 , &stbuf
);
2188 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, name
.data
, &path
);
2192 v9fs_path_copy(&fidp
->path
, &path
);
2193 } else if (perm
& P9_STAT_MODE_LINK
) {
2194 int32_t ofid
= atoi(extension
.data
);
2195 V9fsFidState
*ofidp
= get_fid(pdu
, ofid
);
2196 if (ofidp
== NULL
) {
2200 err
= v9fs_co_link(pdu
, ofidp
, fidp
, &name
);
2201 put_fid(pdu
, ofidp
);
2205 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, name
.data
, &path
);
2207 fidp
->fid_type
= P9_FID_NONE
;
2210 v9fs_path_copy(&fidp
->path
, &path
);
2211 err
= v9fs_co_lstat(pdu
, &fidp
->path
, &stbuf
);
2213 fidp
->fid_type
= P9_FID_NONE
;
2216 } else if (perm
& P9_STAT_MODE_DEVICE
) {
2218 uint32_t major
, minor
;
2221 if (sscanf(extension
.data
, "%c %u %u", &ctype
, &major
, &minor
) != 3) {
2238 nmode
|= perm
& 0777;
2239 err
= v9fs_co_mknod(pdu
, fidp
, &name
, fidp
->uid
, -1,
2240 makedev(major
, minor
), nmode
, &stbuf
);
2244 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, name
.data
, &path
);
2248 v9fs_path_copy(&fidp
->path
, &path
);
2249 } else if (perm
& P9_STAT_MODE_NAMED_PIPE
) {
2250 err
= v9fs_co_mknod(pdu
, fidp
, &name
, fidp
->uid
, -1,
2251 0, S_IFIFO
| (perm
& 0777), &stbuf
);
2255 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, name
.data
, &path
);
2259 v9fs_path_copy(&fidp
->path
, &path
);
2260 } else if (perm
& P9_STAT_MODE_SOCKET
) {
2261 err
= v9fs_co_mknod(pdu
, fidp
, &name
, fidp
->uid
, -1,
2262 0, S_IFSOCK
| (perm
& 0777), &stbuf
);
2266 err
= v9fs_co_name_to_path(pdu
, &fidp
->path
, name
.data
, &path
);
2270 v9fs_path_copy(&fidp
->path
, &path
);
2272 err
= v9fs_co_open2(pdu
, fidp
, &name
, -1,
2273 omode_to_uflags(mode
)|O_CREAT
, perm
, &stbuf
);
2277 fidp
->fid_type
= P9_FID_FILE
;
2278 fidp
->open_flags
= omode_to_uflags(mode
);
2279 if (fidp
->open_flags
& O_EXCL
) {
2281 * We let the host file system do O_EXCL check
2282 * We should not reclaim such fd
2284 fidp
->flags
|= FID_NON_RECLAIMABLE
;
2287 iounit
= get_iounit(pdu
, &fidp
->path
);
2288 stat_to_qid(&stbuf
, &qid
);
2289 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
2291 trace_v9fs_create_return(pdu
->tag
, pdu
->id
,
2292 qid
.type
, qid
.version
, qid
.path
, iounit
);
2296 complete_pdu(pdu
->s
, pdu
, err
);
2297 v9fs_string_free(&name
);
2298 v9fs_string_free(&extension
);
2299 v9fs_path_free(&path
);
2302 static void v9fs_symlink(void *opaque
)
2304 V9fsPDU
*pdu
= opaque
;
2307 V9fsFidState
*dfidp
;
2315 pdu_unmarshal(pdu
, offset
, "dssd", &dfid
, &name
, &symname
, &gid
);
2316 trace_v9fs_symlink(pdu
->tag
, pdu
->id
, dfid
, name
.data
, symname
.data
, gid
);
2318 dfidp
= get_fid(pdu
, dfid
);
2319 if (dfidp
== NULL
) {
2323 err
= v9fs_co_symlink(pdu
, dfidp
, &name
, symname
.data
, gid
, &stbuf
);
2327 stat_to_qid(&stbuf
, &qid
);
2328 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2330 trace_v9fs_symlink_return(pdu
->tag
, pdu
->id
,
2331 qid
.type
, qid
.version
, qid
.path
);
2333 put_fid(pdu
, dfidp
);
2335 complete_pdu(pdu
->s
, pdu
, err
);
2336 v9fs_string_free(&name
);
2337 v9fs_string_free(&symname
);
2340 static void v9fs_flush(void *opaque
)
2344 V9fsPDU
*cancel_pdu
;
2345 V9fsPDU
*pdu
= opaque
;
2346 V9fsState
*s
= pdu
->s
;
2348 pdu_unmarshal(pdu
, offset
, "w", &tag
);
2349 trace_v9fs_flush(pdu
->tag
, pdu
->id
, tag
);
2351 QLIST_FOREACH(cancel_pdu
, &s
->active_list
, next
) {
2352 if (cancel_pdu
->tag
== tag
) {
2357 cancel_pdu
->cancelled
= 1;
2359 * Wait for pdu to complete.
2361 qemu_co_queue_wait(&cancel_pdu
->complete
);
2362 cancel_pdu
->cancelled
= 0;
2363 free_pdu(pdu
->s
, cancel_pdu
);
2365 complete_pdu(s
, pdu
, 7);
2369 static void v9fs_link(void *opaque
)
2371 V9fsPDU
*pdu
= opaque
;
2372 V9fsState
*s
= pdu
->s
;
2373 int32_t dfid
, oldfid
;
2374 V9fsFidState
*dfidp
, *oldfidp
;
2379 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2380 trace_v9fs_link(pdu
->tag
, pdu
->id
, dfid
, oldfid
, name
.data
);
2382 dfidp
= get_fid(pdu
, dfid
);
2383 if (dfidp
== NULL
) {
2388 oldfidp
= get_fid(pdu
, oldfid
);
2389 if (oldfidp
== NULL
) {
2393 err
= v9fs_co_link(pdu
, oldfidp
, dfidp
, &name
);
2398 put_fid(pdu
, dfidp
);
2400 v9fs_string_free(&name
);
2401 complete_pdu(s
, pdu
, err
);
2404 /* Only works with path name based fid */
2405 static void v9fs_remove(void *opaque
)
2411 V9fsPDU
*pdu
= opaque
;
2413 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2414 trace_v9fs_remove(pdu
->tag
, pdu
->id
, fid
);
2416 fidp
= get_fid(pdu
, fid
);
2421 /* if fs driver is not path based, return EOPNOTSUPP */
2422 if (!(pdu
->s
->ctx
.export_flags
& V9FS_PATHNAME_FSCONTEXT
)) {
2427 * IF the file is unlinked, we cannot reopen
2428 * the file later. So don't reclaim fd
2430 err
= v9fs_mark_fids_unreclaim(pdu
, &fidp
->path
);
2434 err
= v9fs_co_remove(pdu
, &fidp
->path
);
2439 /* For TREMOVE we need to clunk the fid even on failed remove */
2440 clunk_fid(pdu
->s
, fidp
->fid
);
2443 complete_pdu(pdu
->s
, pdu
, err
);
2446 static void v9fs_unlinkat(void *opaque
)
2450 int32_t dfid
, flags
;
2453 V9fsFidState
*dfidp
;
2454 V9fsPDU
*pdu
= opaque
;
2456 pdu_unmarshal(pdu
, offset
, "dsd", &dfid
, &name
, &flags
);
2458 dfidp
= get_fid(pdu
, dfid
);
2459 if (dfidp
== NULL
) {
2464 * IF the file is unlinked, we cannot reopen
2465 * the file later. So don't reclaim fd
2467 v9fs_path_init(&path
);
2468 err
= v9fs_co_name_to_path(pdu
, &dfidp
->path
, name
.data
, &path
);
2472 err
= v9fs_mark_fids_unreclaim(pdu
, &path
);
2476 err
= v9fs_co_unlinkat(pdu
, &dfidp
->path
, &name
, flags
);
2481 put_fid(pdu
, dfidp
);
2482 v9fs_path_free(&path
);
2484 complete_pdu(pdu
->s
, pdu
, err
);
2485 v9fs_string_free(&name
);
2489 /* Only works with path name based fid */
2490 static int v9fs_complete_rename(V9fsPDU
*pdu
, V9fsFidState
*fidp
,
2491 int32_t newdirfid
, V9fsString
*name
)
2496 V9fsFidState
*tfidp
;
2497 V9fsState
*s
= pdu
->s
;
2498 V9fsFidState
*dirfidp
= NULL
;
2499 char *old_name
, *new_name
;
2501 v9fs_path_init(&new_path
);
2502 if (newdirfid
!= -1) {
2503 dirfidp
= get_fid(pdu
, newdirfid
);
2504 if (dirfidp
== NULL
) {
2508 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2509 v9fs_co_name_to_path(pdu
, &dirfidp
->path
, name
->data
, &new_path
);
2511 old_name
= fidp
->path
.data
;
2512 end
= strrchr(old_name
, '/');
2518 new_name
= g_malloc0(end
- old_name
+ name
->size
+ 1);
2519 strncat(new_name
, old_name
, end
- old_name
);
2520 strncat(new_name
+ (end
- old_name
), name
->data
, name
->size
);
2521 v9fs_co_name_to_path(pdu
, NULL
, new_name
, &new_path
);
2524 err
= v9fs_co_rename(pdu
, &fidp
->path
, &new_path
);
2529 * Fixup fid's pointing to the old name to
2530 * start pointing to the new name
2532 for (tfidp
= s
->fid_list
; tfidp
; tfidp
= tfidp
->next
) {
2533 if (v9fs_path_is_ancestor(&fidp
->path
, &tfidp
->path
)) {
2534 /* replace the name */
2535 v9fs_fix_path(&tfidp
->path
, &new_path
, strlen(fidp
->path
.data
));
2540 put_fid(pdu
, dirfidp
);
2542 v9fs_path_free(&new_path
);
2547 /* Only works with path name based fid */
2548 static void v9fs_rename(void *opaque
)
2556 V9fsPDU
*pdu
= opaque
;
2557 V9fsState
*s
= pdu
->s
;
2559 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newdirfid
, &name
);
2561 fidp
= get_fid(pdu
, fid
);
2566 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
2567 /* if fs driver is not path based, return EOPNOTSUPP */
2568 if (!(pdu
->s
->ctx
.export_flags
& V9FS_PATHNAME_FSCONTEXT
)) {
2572 v9fs_path_write_lock(s
);
2573 err
= v9fs_complete_rename(pdu
, fidp
, newdirfid
, &name
);
2574 v9fs_path_unlock(s
);
2581 complete_pdu(s
, pdu
, err
);
2582 v9fs_string_free(&name
);
2585 static void v9fs_fix_fid_paths(V9fsPDU
*pdu
, V9fsPath
*olddir
,
2586 V9fsString
*old_name
, V9fsPath
*newdir
,
2587 V9fsString
*new_name
)
2589 V9fsFidState
*tfidp
;
2590 V9fsPath oldpath
, newpath
;
2591 V9fsState
*s
= pdu
->s
;
2594 v9fs_path_init(&oldpath
);
2595 v9fs_path_init(&newpath
);
2596 v9fs_co_name_to_path(pdu
, olddir
, old_name
->data
, &oldpath
);
2597 v9fs_co_name_to_path(pdu
, newdir
, new_name
->data
, &newpath
);
2600 * Fixup fid's pointing to the old name to
2601 * start pointing to the new name
2603 for (tfidp
= s
->fid_list
; tfidp
; tfidp
= tfidp
->next
) {
2604 if (v9fs_path_is_ancestor(&oldpath
, &tfidp
->path
)) {
2605 /* replace the name */
2606 v9fs_fix_path(&tfidp
->path
, &newpath
, strlen(oldpath
.data
));
2609 v9fs_path_free(&oldpath
);
2610 v9fs_path_free(&newpath
);
2613 static int v9fs_complete_renameat(V9fsPDU
*pdu
, int32_t olddirfid
,
2614 V9fsString
*old_name
, int32_t newdirfid
,
2615 V9fsString
*new_name
)
2618 V9fsState
*s
= pdu
->s
;
2619 V9fsFidState
*newdirfidp
= NULL
, *olddirfidp
= NULL
;
2621 olddirfidp
= get_fid(pdu
, olddirfid
);
2622 if (olddirfidp
== NULL
) {
2626 if (newdirfid
!= -1) {
2627 newdirfidp
= get_fid(pdu
, newdirfid
);
2628 if (newdirfidp
== NULL
) {
2633 newdirfidp
= get_fid(pdu
, olddirfid
);
2636 err
= v9fs_co_renameat(pdu
, &olddirfidp
->path
, old_name
,
2637 &newdirfidp
->path
, new_name
);
2641 if (s
->ctx
.export_flags
& V9FS_PATHNAME_FSCONTEXT
) {
2642 /* Only for path based fid we need to do the below fixup */
2643 v9fs_fix_fid_paths(pdu
, &olddirfidp
->path
, old_name
,
2644 &newdirfidp
->path
, new_name
);
2648 put_fid(pdu
, olddirfidp
);
2651 put_fid(pdu
, newdirfidp
);
2656 static void v9fs_renameat(void *opaque
)
2660 V9fsPDU
*pdu
= opaque
;
2661 V9fsState
*s
= pdu
->s
;
2662 int32_t olddirfid
, newdirfid
;
2663 V9fsString old_name
, new_name
;
2665 pdu_unmarshal(pdu
, offset
, "dsds", &olddirfid
,
2666 &old_name
, &newdirfid
, &new_name
);
2668 v9fs_path_write_lock(s
);
2669 err
= v9fs_complete_renameat(pdu
, olddirfid
,
2670 &old_name
, newdirfid
, &new_name
);
2671 v9fs_path_unlock(s
);
2675 complete_pdu(s
, pdu
, err
);
2676 v9fs_string_free(&old_name
);
2677 v9fs_string_free(&new_name
);
2680 static void v9fs_wstat(void *opaque
)
2689 V9fsPDU
*pdu
= opaque
;
2690 V9fsState
*s
= pdu
->s
;
2692 pdu_unmarshal(pdu
, offset
, "dwS", &fid
, &unused
, &v9stat
);
2693 trace_v9fs_wstat(pdu
->tag
, pdu
->id
, fid
,
2694 v9stat
.mode
, v9stat
.atime
, v9stat
.mtime
);
2696 fidp
= get_fid(pdu
, fid
);
2701 /* do we need to sync the file? */
2702 if (donttouch_stat(&v9stat
)) {
2703 err
= v9fs_co_fsync(pdu
, fidp
, 0);
2706 if (v9stat
.mode
!= -1) {
2708 err
= v9fs_co_lstat(pdu
, &fidp
->path
, &stbuf
);
2712 v9_mode
= stat_to_v9mode(&stbuf
);
2713 if ((v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2714 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2715 /* Attempting to change the type */
2719 err
= v9fs_co_chmod(pdu
, &fidp
->path
,
2720 v9mode_to_mode(v9stat
.mode
,
2721 &v9stat
.extension
));
2726 if (v9stat
.mtime
!= -1 || v9stat
.atime
!= -1) {
2727 struct timespec times
[2];
2728 if (v9stat
.atime
!= -1) {
2729 times
[0].tv_sec
= v9stat
.atime
;
2730 times
[0].tv_nsec
= 0;
2732 times
[0].tv_nsec
= UTIME_OMIT
;
2734 if (v9stat
.mtime
!= -1) {
2735 times
[1].tv_sec
= v9stat
.mtime
;
2736 times
[1].tv_nsec
= 0;
2738 times
[1].tv_nsec
= UTIME_OMIT
;
2740 err
= v9fs_co_utimensat(pdu
, &fidp
->path
, times
);
2745 if (v9stat
.n_gid
!= -1 || v9stat
.n_uid
!= -1) {
2746 err
= v9fs_co_chown(pdu
, &fidp
->path
, v9stat
.n_uid
, v9stat
.n_gid
);
2751 if (v9stat
.name
.size
!= 0) {
2752 err
= v9fs_complete_rename(pdu
, fidp
, -1, &v9stat
.name
);
2757 if (v9stat
.length
!= -1) {
2758 err
= v9fs_co_truncate(pdu
, &fidp
->path
, v9stat
.length
);
2767 v9fs_stat_free(&v9stat
);
2768 complete_pdu(s
, pdu
, err
);
2771 static int v9fs_fill_statfs(V9fsState
*s
, V9fsPDU
*pdu
, struct statfs
*stbuf
)
2783 int32_t bsize_factor
;
2786 * compute bsize factor based on host file system block size
2789 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/stbuf
->f_bsize
;
2790 if (!bsize_factor
) {
2793 f_type
= stbuf
->f_type
;
2794 f_bsize
= stbuf
->f_bsize
;
2795 f_bsize
*= bsize_factor
;
2797 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2798 * adjust(divide) the number of blocks, free blocks and available
2799 * blocks by bsize factor
2801 f_blocks
= stbuf
->f_blocks
/bsize_factor
;
2802 f_bfree
= stbuf
->f_bfree
/bsize_factor
;
2803 f_bavail
= stbuf
->f_bavail
/bsize_factor
;
2804 f_files
= stbuf
->f_files
;
2805 f_ffree
= stbuf
->f_ffree
;
2806 fsid_val
= (unsigned int) stbuf
->f_fsid
.__val
[0] |
2807 (unsigned long long)stbuf
->f_fsid
.__val
[1] << 32;
2808 f_namelen
= stbuf
->f_namelen
;
2810 return pdu_marshal(pdu
, offset
, "ddqqqqqqd",
2811 f_type
, f_bsize
, f_blocks
, f_bfree
,
2812 f_bavail
, f_files
, f_ffree
,
2813 fsid_val
, f_namelen
);
2816 static void v9fs_statfs(void *opaque
)
2822 struct statfs stbuf
;
2823 V9fsPDU
*pdu
= opaque
;
2824 V9fsState
*s
= pdu
->s
;
2826 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2827 fidp
= get_fid(pdu
, fid
);
2832 retval
= v9fs_co_statfs(pdu
, &fidp
->path
, &stbuf
);
2837 retval
+= v9fs_fill_statfs(s
, pdu
, &stbuf
);
2841 complete_pdu(s
, pdu
, retval
);
2845 static void v9fs_mknod(void *opaque
)
2858 V9fsPDU
*pdu
= opaque
;
2859 V9fsState
*s
= pdu
->s
;
2861 pdu_unmarshal(pdu
, offset
, "dsdddd", &fid
, &name
, &mode
,
2862 &major
, &minor
, &gid
);
2863 trace_v9fs_mknod(pdu
->tag
, pdu
->id
, fid
, mode
, major
, minor
);
2865 fidp
= get_fid(pdu
, fid
);
2870 err
= v9fs_co_mknod(pdu
, fidp
, &name
, fidp
->uid
, gid
,
2871 makedev(major
, minor
), mode
, &stbuf
);
2875 stat_to_qid(&stbuf
, &qid
);
2877 err
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2878 trace_v9fs_mknod_return(pdu
->tag
, pdu
->id
,
2879 qid
.type
, qid
.version
, qid
.path
);
2883 complete_pdu(s
, pdu
, err
);
2884 v9fs_string_free(&name
);
2888 * Implement posix byte range locking code
2889 * Server side handling of locking code is very simple, because 9p server in
2890 * QEMU can handle only one client. And most of the lock handling
2891 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
2892 * do any thing in * qemu 9p server side lock code path.
2893 * So when a TLOCK request comes, always return success
2895 static void v9fs_lock(void *opaque
)
2902 int32_t fid
, err
= 0;
2903 V9fsPDU
*pdu
= opaque
;
2904 V9fsState
*s
= pdu
->s
;
2906 flock
= g_malloc(sizeof(*flock
));
2907 pdu_unmarshal(pdu
, offset
, "dbdqqds", &fid
, &flock
->type
,
2908 &flock
->flags
, &flock
->start
, &flock
->length
,
2909 &flock
->proc_id
, &flock
->client_id
);
2911 trace_v9fs_lock(pdu
->tag
, pdu
->id
, fid
,
2912 flock
->type
, flock
->start
, flock
->length
);
2914 status
= P9_LOCK_ERROR
;
2916 /* We support only block flag now (that too ignored currently) */
2917 if (flock
->flags
& ~P9_LOCK_FLAGS_BLOCK
) {
2921 fidp
= get_fid(pdu
, fid
);
2926 err
= v9fs_co_fstat(pdu
, fidp
, &stbuf
);
2930 status
= P9_LOCK_SUCCESS
;
2935 err
+= pdu_marshal(pdu
, offset
, "b", status
);
2936 trace_v9fs_lock_return(pdu
->tag
, pdu
->id
, status
);
2937 complete_pdu(s
, pdu
, err
);
2938 v9fs_string_free(&flock
->client_id
);
2943 * When a TGETLOCK request comes, always return success because all lock
2944 * handling is done by client's VFS layer.
2946 static void v9fs_getlock(void *opaque
)
2952 int32_t fid
, err
= 0;
2953 V9fsPDU
*pdu
= opaque
;
2954 V9fsState
*s
= pdu
->s
;
2956 glock
= g_malloc(sizeof(*glock
));
2957 pdu_unmarshal(pdu
, offset
, "dbqqds", &fid
, &glock
->type
,
2958 &glock
->start
, &glock
->length
, &glock
->proc_id
,
2961 trace_v9fs_getlock(pdu
->tag
, pdu
->id
, fid
,
2962 glock
->type
, glock
->start
, glock
->length
);
2964 fidp
= get_fid(pdu
, fid
);
2969 err
= v9fs_co_fstat(pdu
, fidp
, &stbuf
);
2973 glock
->type
= P9_LOCK_TYPE_UNLCK
;
2974 offset
+= pdu_marshal(pdu
, offset
, "bqqds", glock
->type
,
2975 glock
->start
, glock
->length
, glock
->proc_id
,
2978 trace_v9fs_getlock_return(pdu
->tag
, pdu
->id
, glock
->type
, glock
->start
,
2979 glock
->length
, glock
->proc_id
);
2983 complete_pdu(s
, pdu
, err
);
2984 v9fs_string_free(&glock
->client_id
);
2988 static void v9fs_mkdir(void *opaque
)
2990 V9fsPDU
*pdu
= opaque
;
3001 pdu_unmarshal(pdu
, offset
, "dsdd", &fid
, &name
, &mode
, &gid
);
3003 trace_v9fs_mkdir(pdu
->tag
, pdu
->id
, fid
, name
.data
, mode
, gid
);
3005 fidp
= get_fid(pdu
, fid
);
3010 err
= v9fs_co_mkdir(pdu
, fidp
, &name
, mode
, fidp
->uid
, gid
, &stbuf
);
3014 stat_to_qid(&stbuf
, &qid
);
3015 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
3017 trace_v9fs_mkdir_return(pdu
->tag
, pdu
->id
,
3018 qid
.type
, qid
.version
, qid
.path
, err
);
3022 complete_pdu(pdu
->s
, pdu
, err
);
3023 v9fs_string_free(&name
);
3026 static void v9fs_xattrwalk(void *opaque
)
3032 int32_t fid
, newfid
;
3033 V9fsFidState
*file_fidp
;
3034 V9fsFidState
*xattr_fidp
= NULL
;
3035 V9fsPDU
*pdu
= opaque
;
3036 V9fsState
*s
= pdu
->s
;
3038 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newfid
, &name
);
3039 trace_v9fs_xattrwalk(pdu
->tag
, pdu
->id
, fid
, newfid
, name
.data
);
3041 file_fidp
= get_fid(pdu
, fid
);
3042 if (file_fidp
== NULL
) {
3046 xattr_fidp
= alloc_fid(s
, newfid
);
3047 if (xattr_fidp
== NULL
) {
3051 v9fs_path_copy(&xattr_fidp
->path
, &file_fidp
->path
);
3052 if (name
.data
[0] == 0) {
3054 * listxattr request. Get the size first
3056 size
= v9fs_co_llistxattr(pdu
, &xattr_fidp
->path
, NULL
, 0);
3059 clunk_fid(s
, xattr_fidp
->fid
);
3063 * Read the xattr value
3065 xattr_fidp
->fs
.xattr
.len
= size
;
3066 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3067 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3069 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
3070 err
= v9fs_co_llistxattr(pdu
, &xattr_fidp
->path
,
3071 xattr_fidp
->fs
.xattr
.value
,
3072 xattr_fidp
->fs
.xattr
.len
);
3074 clunk_fid(s
, xattr_fidp
->fid
);
3078 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3082 * specific xattr fid. We check for xattr
3083 * presence also collect the xattr size
3085 size
= v9fs_co_lgetxattr(pdu
, &xattr_fidp
->path
,
3089 clunk_fid(s
, xattr_fidp
->fid
);
3093 * Read the xattr value
3095 xattr_fidp
->fs
.xattr
.len
= size
;
3096 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3097 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3099 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
3100 err
= v9fs_co_lgetxattr(pdu
, &xattr_fidp
->path
,
3101 &name
, xattr_fidp
->fs
.xattr
.value
,
3102 xattr_fidp
->fs
.xattr
.len
);
3104 clunk_fid(s
, xattr_fidp
->fid
);
3108 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3111 trace_v9fs_xattrwalk_return(pdu
->tag
, pdu
->id
, size
);
3113 put_fid(pdu
, file_fidp
);
3115 put_fid(pdu
, xattr_fidp
);
3118 complete_pdu(s
, pdu
, err
);
3119 v9fs_string_free(&name
);
3122 static void v9fs_xattrcreate(void *opaque
)
3130 V9fsFidState
*file_fidp
;
3131 V9fsFidState
*xattr_fidp
;
3132 V9fsPDU
*pdu
= opaque
;
3133 V9fsState
*s
= pdu
->s
;
3135 pdu_unmarshal(pdu
, offset
, "dsqd",
3136 &fid
, &name
, &size
, &flags
);
3137 trace_v9fs_xattrcreate(pdu
->tag
, pdu
->id
, fid
, name
.data
, size
, flags
);
3139 file_fidp
= get_fid(pdu
, fid
);
3140 if (file_fidp
== NULL
) {
3144 /* Make the file fid point to xattr */
3145 xattr_fidp
= file_fidp
;
3146 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3147 xattr_fidp
->fs
.xattr
.copied_len
= 0;
3148 xattr_fidp
->fs
.xattr
.len
= size
;
3149 xattr_fidp
->fs
.xattr
.flags
= flags
;
3150 v9fs_string_init(&xattr_fidp
->fs
.xattr
.name
);
3151 v9fs_string_copy(&xattr_fidp
->fs
.xattr
.name
, &name
);
3153 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
3155 xattr_fidp
->fs
.xattr
.value
= NULL
;
3158 put_fid(pdu
, file_fidp
);
3160 complete_pdu(s
, pdu
, err
);
3161 v9fs_string_free(&name
);
3164 static void v9fs_readlink(void *opaque
)
3166 V9fsPDU
*pdu
= opaque
;
3173 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3174 trace_v9fs_readlink(pdu
->tag
, pdu
->id
, fid
);
3175 fidp
= get_fid(pdu
, fid
);
3181 v9fs_string_init(&target
);
3182 err
= v9fs_co_readlink(pdu
, &fidp
->path
, &target
);
3186 offset
+= pdu_marshal(pdu
, offset
, "s", &target
);
3188 trace_v9fs_readlink_return(pdu
->tag
, pdu
->id
, target
.data
);
3189 v9fs_string_free(&target
);
3193 complete_pdu(pdu
->s
, pdu
, err
);
3196 static CoroutineEntry
*pdu_co_handlers
[] = {
3197 [P9_TREADDIR
] = v9fs_readdir
,
3198 [P9_TSTATFS
] = v9fs_statfs
,
3199 [P9_TGETATTR
] = v9fs_getattr
,
3200 [P9_TSETATTR
] = v9fs_setattr
,
3201 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
3202 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
3203 [P9_TMKNOD
] = v9fs_mknod
,
3204 [P9_TRENAME
] = v9fs_rename
,
3205 [P9_TLOCK
] = v9fs_lock
,
3206 [P9_TGETLOCK
] = v9fs_getlock
,
3207 [P9_TRENAMEAT
] = v9fs_renameat
,
3208 [P9_TREADLINK
] = v9fs_readlink
,
3209 [P9_TUNLINKAT
] = v9fs_unlinkat
,
3210 [P9_TMKDIR
] = v9fs_mkdir
,
3211 [P9_TVERSION
] = v9fs_version
,
3212 [P9_TLOPEN
] = v9fs_open
,
3213 [P9_TATTACH
] = v9fs_attach
,
3214 [P9_TSTAT
] = v9fs_stat
,
3215 [P9_TWALK
] = v9fs_walk
,
3216 [P9_TCLUNK
] = v9fs_clunk
,
3217 [P9_TFSYNC
] = v9fs_fsync
,
3218 [P9_TOPEN
] = v9fs_open
,
3219 [P9_TREAD
] = v9fs_read
,
3221 [P9_TAUTH
] = v9fs_auth
,
3223 [P9_TFLUSH
] = v9fs_flush
,
3224 [P9_TLINK
] = v9fs_link
,
3225 [P9_TSYMLINK
] = v9fs_symlink
,
3226 [P9_TCREATE
] = v9fs_create
,
3227 [P9_TLCREATE
] = v9fs_lcreate
,
3228 [P9_TWRITE
] = v9fs_write
,
3229 [P9_TWSTAT
] = v9fs_wstat
,
3230 [P9_TREMOVE
] = v9fs_remove
,
3233 static void v9fs_op_not_supp(void *opaque
)
3235 V9fsPDU
*pdu
= opaque
;
3236 complete_pdu(pdu
->s
, pdu
, -EOPNOTSUPP
);
3239 static void v9fs_fs_ro(void *opaque
)
3241 V9fsPDU
*pdu
= opaque
;
3242 complete_pdu(pdu
->s
, pdu
, -EROFS
);
3245 static inline bool is_read_only_op(V9fsPDU
*pdu
)
3272 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3275 CoroutineEntry
*handler
;
3277 if (pdu
->id
>= ARRAY_SIZE(pdu_co_handlers
) ||
3278 (pdu_co_handlers
[pdu
->id
] == NULL
)) {
3279 handler
= v9fs_op_not_supp
;
3281 handler
= pdu_co_handlers
[pdu
->id
];
3284 if (is_ro_export(&s
->ctx
) && !is_read_only_op(pdu
)) {
3285 handler
= v9fs_fs_ro
;
3287 co
= qemu_coroutine_create(handler
);
3288 qemu_coroutine_enter(co
, pdu
);
3291 void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3293 V9fsState
*s
= (V9fsState
*)vdev
;
3297 while ((pdu
= alloc_pdu(s
)) &&
3298 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3301 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3302 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3304 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3306 memcpy(&pdu
->size
, ptr
, 4);
3308 memcpy(&pdu
->tag
, ptr
+ 5, 2);
3309 qemu_co_queue_init(&pdu
->complete
);
3315 void virtio_9p_set_fd_limit(void)
3318 if (getrlimit(RLIMIT_NOFILE
, &rlim
) < 0) {
3319 fprintf(stderr
, "Failed to get the resource limit\n");
3322 open_fd_hw
= rlim
.rlim_cur
- MIN(400, rlim
.rlim_cur
/3);
3323 open_fd_rc
= rlim
.rlim_cur
/2;