]>
git.proxmox.com Git - qemu.git/blob - hw/9pfs/virtio-9p.c
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.
14 #include "hw/virtio.h"
16 #include "qemu_socket.h"
17 #include "hw/virtio-pci.h"
18 #include "virtio-9p.h"
19 #include "fsdev/qemu-fsdev.h"
20 #include "virtio-9p-debug.h"
21 #include "virtio-9p-xattr.h"
22 #include "virtio-9p-coth.h"
38 static int omode_to_uflags(int8_t mode
)
72 void cred_init(FsCred
*credp
)
80 static int v9fs_do_lstat(V9fsState
*s
, V9fsString
*path
, struct stat
*stbuf
)
82 return s
->ops
->lstat(&s
->ctx
, path
->data
, stbuf
);
85 static int v9fs_do_close(V9fsState
*s
, int fd
)
87 return s
->ops
->close(&s
->ctx
, fd
);
90 static int v9fs_do_closedir(V9fsState
*s
, DIR *dir
)
92 return s
->ops
->closedir(&s
->ctx
, dir
);
95 static DIR *v9fs_do_opendir(V9fsState
*s
, V9fsString
*path
)
97 return s
->ops
->opendir(&s
->ctx
, path
->data
);
100 static void v9fs_do_rewinddir(V9fsState
*s
, DIR *dir
)
102 return s
->ops
->rewinddir(&s
->ctx
, dir
);
105 static off_t
v9fs_do_telldir(V9fsState
*s
, DIR *dir
)
107 return s
->ops
->telldir(&s
->ctx
, dir
);
110 static void v9fs_do_seekdir(V9fsState
*s
, DIR *dir
, off_t off
)
112 return s
->ops
->seekdir(&s
->ctx
, dir
, off
);
115 static int v9fs_do_preadv(V9fsState
*s
, int fd
, const struct iovec
*iov
,
116 int iovcnt
, int64_t offset
)
118 return s
->ops
->preadv(&s
->ctx
, fd
, iov
, iovcnt
, offset
);
121 static int v9fs_do_pwritev(V9fsState
*s
, int fd
, const struct iovec
*iov
,
122 int iovcnt
, int64_t offset
)
124 return s
->ops
->pwritev(&s
->ctx
, fd
, iov
, iovcnt
, offset
);
127 static int v9fs_do_chmod(V9fsState
*s
, V9fsString
*path
, mode_t mode
)
132 return s
->ops
->chmod(&s
->ctx
, path
->data
, &cred
);
135 static int v9fs_do_mknod(V9fsState
*s
, char *name
,
136 mode_t mode
, dev_t dev
, uid_t uid
, gid_t gid
)
144 return s
->ops
->mknod(&s
->ctx
, name
, &cred
);
147 static int v9fs_do_fstat(V9fsState
*s
, int fd
, struct stat
*stbuf
)
149 return s
->ops
->fstat(&s
->ctx
, fd
, stbuf
);
152 static int v9fs_do_symlink(V9fsState
*s
, V9fsFidState
*fidp
,
153 const char *oldpath
, const char *newpath
, gid_t gid
)
157 cred
.fc_uid
= fidp
->uid
;
161 return s
->ops
->symlink(&s
->ctx
, oldpath
, newpath
, &cred
);
164 static int v9fs_do_link(V9fsState
*s
, V9fsString
*oldpath
, V9fsString
*newpath
)
166 return s
->ops
->link(&s
->ctx
, oldpath
->data
, newpath
->data
);
169 static int v9fs_do_truncate(V9fsState
*s
, V9fsString
*path
, off_t size
)
171 return s
->ops
->truncate(&s
->ctx
, path
->data
, size
);
174 static int v9fs_do_chown(V9fsState
*s
, V9fsString
*path
, uid_t uid
, gid_t gid
)
181 return s
->ops
->chown(&s
->ctx
, path
->data
, &cred
);
184 static int v9fs_do_utimensat(V9fsState
*s
, V9fsString
*path
,
185 const struct timespec times
[2])
187 return s
->ops
->utimensat(&s
->ctx
, path
->data
, times
);
190 static int v9fs_do_fsync(V9fsState
*s
, int fd
, int datasync
)
192 return s
->ops
->fsync(&s
->ctx
, fd
, datasync
);
195 static int v9fs_do_lsetxattr(V9fsState
*s
, V9fsString
*path
,
196 V9fsString
*xattr_name
,
197 void *value
, size_t size
, int flags
)
199 return s
->ops
->lsetxattr(&s
->ctx
, path
->data
,
200 xattr_name
->data
, value
, size
, flags
);
203 static int v9fs_do_lremovexattr(V9fsState
*s
, V9fsString
*path
,
204 V9fsString
*xattr_name
)
206 return s
->ops
->lremovexattr(&s
->ctx
, path
->data
,
211 static void v9fs_string_init(V9fsString
*str
)
217 static void v9fs_string_free(V9fsString
*str
)
224 static void v9fs_string_null(V9fsString
*str
)
226 v9fs_string_free(str
);
229 static int number_to_string(void *arg
, char type
)
231 unsigned int ret
= 0;
235 unsigned int num
= *(unsigned int *)arg
;
244 unsigned long num
= *(unsigned long *)arg
;
252 printf("Number_to_string: Unknown number format\n");
259 static int GCC_FMT_ATTR(2, 0)
260 v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
263 char *iter
= (char *)fmt
;
267 unsigned int arg_uint
;
268 unsigned long arg_ulong
;
270 /* Find the number of %'s that denotes an argument */
271 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
276 len
= strlen(fmt
) - 2*nr_args
;
286 /* Now parse the format string */
287 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
291 arg_uint
= va_arg(ap2
, unsigned int);
292 len
+= number_to_string((void *)&arg_uint
, 'u');
295 if (*++iter
== 'u') {
296 arg_ulong
= va_arg(ap2
, unsigned long);
297 len
+= number_to_string((void *)&arg_ulong
, 'U');
303 arg_char_ptr
= va_arg(ap2
, char *);
304 len
+= strlen(arg_char_ptr
);
311 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
318 *strp
= g_malloc((len
+ 1) * sizeof(**strp
));
320 return vsprintf(*strp
, fmt
, ap
);
323 static void GCC_FMT_ATTR(2, 3)
324 v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
329 v9fs_string_free(str
);
332 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
339 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
341 v9fs_string_free(lhs
);
342 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
346 * Return TRUE if s1 is an ancestor of s2.
348 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
349 * As a special case, We treat s1 as ancestor of s2 if they are same!
351 static int v9fs_path_is_ancestor(V9fsString
*s1
, V9fsString
*s2
)
353 if (!strncmp(s1
->data
, s2
->data
, s1
->size
)) {
354 if (s2
->data
[s1
->size
] == '\0' || s2
->data
[s1
->size
] == '/') {
361 static size_t v9fs_string_size(V9fsString
*str
)
366 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
370 for (f
= s
->fid_list
; f
; f
= f
->next
) {
379 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
383 f
= lookup_fid(s
, fid
);
388 f
= g_malloc0(sizeof(V9fsFidState
));
391 f
->fid_type
= P9_FID_NONE
;
393 f
->next
= s
->fid_list
;
399 static int v9fs_xattr_fid_clunk(V9fsState
*s
, V9fsFidState
*fidp
)
403 if (fidp
->fs
.xattr
.copied_len
== -1) {
404 /* getxattr/listxattr fid */
408 * if this is fid for setxattr. clunk should
409 * result in setxattr localcall
411 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
412 /* clunk after partial write */
416 if (fidp
->fs
.xattr
.len
) {
417 retval
= v9fs_do_lsetxattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
418 fidp
->fs
.xattr
.value
,
420 fidp
->fs
.xattr
.flags
);
422 retval
= v9fs_do_lremovexattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
);
425 v9fs_string_free(&fidp
->fs
.xattr
.name
);
427 if (fidp
->fs
.xattr
.value
) {
428 g_free(fidp
->fs
.xattr
.value
);
433 static int free_fid(V9fsState
*s
, int32_t fid
)
436 V9fsFidState
**fidpp
, *fidp
;
438 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
439 if ((*fidpp
)->fid
== fid
) {
444 if (*fidpp
== NULL
) {
451 if (fidp
->fid_type
== P9_FID_FILE
) {
452 v9fs_do_close(s
, fidp
->fs
.fd
);
453 } else if (fidp
->fid_type
== P9_FID_DIR
) {
454 v9fs_do_closedir(s
, fidp
->fs
.dir
);
455 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
456 retval
= v9fs_xattr_fid_clunk(s
, fidp
);
458 v9fs_string_free(&fidp
->path
);
464 #define P9_QID_TYPE_DIR 0x80
465 #define P9_QID_TYPE_SYMLINK 0x02
467 #define P9_STAT_MODE_DIR 0x80000000
468 #define P9_STAT_MODE_APPEND 0x40000000
469 #define P9_STAT_MODE_EXCL 0x20000000
470 #define P9_STAT_MODE_MOUNT 0x10000000
471 #define P9_STAT_MODE_AUTH 0x08000000
472 #define P9_STAT_MODE_TMP 0x04000000
473 #define P9_STAT_MODE_SYMLINK 0x02000000
474 #define P9_STAT_MODE_LINK 0x01000000
475 #define P9_STAT_MODE_DEVICE 0x00800000
476 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
477 #define P9_STAT_MODE_SOCKET 0x00100000
478 #define P9_STAT_MODE_SETUID 0x00080000
479 #define P9_STAT_MODE_SETGID 0x00040000
480 #define P9_STAT_MODE_SETVTX 0x00010000
482 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
483 P9_STAT_MODE_SYMLINK | \
484 P9_STAT_MODE_LINK | \
485 P9_STAT_MODE_DEVICE | \
486 P9_STAT_MODE_NAMED_PIPE | \
489 /* This is the algorithm from ufs in spfs */
490 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
494 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
495 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
496 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
498 if (S_ISDIR(stbuf
->st_mode
)) {
499 qidp
->type
|= P9_QID_TYPE_DIR
;
501 if (S_ISLNK(stbuf
->st_mode
)) {
502 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
506 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
511 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
516 stat_to_qid(&stbuf
, qidp
);
520 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
524 if (!QLIST_EMPTY(&s
->free_list
)) {
525 pdu
= QLIST_FIRST(&s
->free_list
);
526 QLIST_REMOVE(pdu
, next
);
531 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
537 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
541 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
542 size_t offset
, size_t size
, int pack
)
547 for (i
= 0; size
&& i
< sg_count
; i
++) {
549 if (offset
>= sg
[i
].iov_len
) {
551 offset
-= sg
[i
].iov_len
;
554 len
= MIN(sg
[i
].iov_len
- offset
, size
);
556 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
558 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
573 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
575 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
579 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
582 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
586 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
590 struct iovec
*src_sg
;
594 src_sg
= pdu
->elem
.in_sg
;
595 num
= pdu
->elem
.in_num
;
597 src_sg
= pdu
->elem
.out_sg
;
598 num
= pdu
->elem
.out_num
;
602 for (i
= 0; i
< num
; i
++) {
604 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
605 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
607 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
608 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
609 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
610 sg
[j
].iov_base
+= (offset
- pos
);
611 sg
[j
].iov_len
-= (offset
- pos
);
614 pos
+= src_sg
[i
].iov_len
;
620 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
622 size_t old_offset
= offset
;
627 for (i
= 0; fmt
[i
]; i
++) {
630 uint8_t *valp
= va_arg(ap
, uint8_t *);
631 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
636 valp
= va_arg(ap
, uint16_t *);
637 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
638 *valp
= le16_to_cpu(val
);
643 valp
= va_arg(ap
, uint32_t *);
644 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
645 *valp
= le32_to_cpu(val
);
650 valp
= va_arg(ap
, uint64_t *);
651 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
652 *valp
= le64_to_cpu(val
);
656 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
657 int *iovcnt
= va_arg(ap
, int *);
658 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
662 V9fsString
*str
= va_arg(ap
, V9fsString
*);
663 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
664 /* FIXME: sanity check str->size */
665 str
->data
= g_malloc(str
->size
+ 1);
666 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
667 str
->data
[str
->size
] = 0;
671 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
672 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
673 &qidp
->type
, &qidp
->version
, &qidp
->path
);
677 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
678 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
679 &statp
->size
, &statp
->type
, &statp
->dev
,
680 &statp
->qid
, &statp
->mode
, &statp
->atime
,
681 &statp
->mtime
, &statp
->length
,
682 &statp
->name
, &statp
->uid
, &statp
->gid
,
683 &statp
->muid
, &statp
->extension
,
684 &statp
->n_uid
, &statp
->n_gid
,
689 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
690 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
691 &iattr
->valid
, &iattr
->mode
,
692 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
693 &iattr
->atime_sec
, &iattr
->atime_nsec
,
694 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
704 return offset
- old_offset
;
707 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
709 size_t old_offset
= offset
;
714 for (i
= 0; fmt
[i
]; i
++) {
717 uint8_t val
= va_arg(ap
, int);
718 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
723 cpu_to_le16w(&val
, va_arg(ap
, int));
724 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
729 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
730 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
735 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
736 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
740 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
741 int *iovcnt
= va_arg(ap
, int *);
742 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
746 V9fsString
*str
= va_arg(ap
, V9fsString
*);
747 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
748 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
752 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
753 offset
+= pdu_marshal(pdu
, offset
, "bdq",
754 qidp
->type
, qidp
->version
, qidp
->path
);
758 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
759 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
760 statp
->size
, statp
->type
, statp
->dev
,
761 &statp
->qid
, statp
->mode
, statp
->atime
,
762 statp
->mtime
, statp
->length
, &statp
->name
,
763 &statp
->uid
, &statp
->gid
, &statp
->muid
,
764 &statp
->extension
, statp
->n_uid
,
765 statp
->n_gid
, statp
->n_muid
);
769 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
770 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
771 statp
->st_result_mask
,
772 &statp
->qid
, statp
->st_mode
,
773 statp
->st_uid
, statp
->st_gid
,
774 statp
->st_nlink
, statp
->st_rdev
,
775 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
776 statp
->st_atime_sec
, statp
->st_atime_nsec
,
777 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
778 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
779 statp
->st_btime_sec
, statp
->st_btime_nsec
,
780 statp
->st_gen
, statp
->st_data_version
);
789 return offset
- old_offset
;
792 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
794 int8_t id
= pdu
->id
+ 1; /* Response */
800 if (s
->proto_version
!= V9FS_PROTO_2000L
) {
803 str
.data
= strerror(err
);
804 str
.size
= strlen(str
.data
);
806 len
+= pdu_marshal(pdu
, len
, "s", &str
);
810 len
+= pdu_marshal(pdu
, len
, "d", err
);
812 if (s
->proto_version
== V9FS_PROTO_2000L
) {
817 /* fill out the header */
818 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
820 /* keep these in sync */
824 /* push onto queue and notify */
825 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
827 /* FIXME: we should batch these completions */
828 virtio_notify(&s
->vdev
, s
->vq
);
833 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
838 if (mode
& P9_STAT_MODE_DIR
) {
842 if (mode
& P9_STAT_MODE_SYMLINK
) {
845 if (mode
& P9_STAT_MODE_SOCKET
) {
848 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
851 if (mode
& P9_STAT_MODE_DEVICE
) {
852 if (extension
&& extension
->data
[0] == 'c') {
863 if (mode
& P9_STAT_MODE_SETUID
) {
866 if (mode
& P9_STAT_MODE_SETGID
) {
869 if (mode
& P9_STAT_MODE_SETVTX
) {
876 static int donttouch_stat(V9fsStat
*stat
)
878 if (stat
->type
== -1 &&
880 stat
->qid
.type
== -1 &&
881 stat
->qid
.version
== -1 &&
882 stat
->qid
.path
== -1 &&
886 stat
->length
== -1 &&
893 stat
->n_muid
== -1) {
900 static void v9fs_stat_free(V9fsStat
*stat
)
902 v9fs_string_free(&stat
->name
);
903 v9fs_string_free(&stat
->uid
);
904 v9fs_string_free(&stat
->gid
);
905 v9fs_string_free(&stat
->muid
);
906 v9fs_string_free(&stat
->extension
);
909 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
913 mode
= stbuf
->st_mode
& 0777;
914 if (S_ISDIR(stbuf
->st_mode
)) {
915 mode
|= P9_STAT_MODE_DIR
;
918 if (S_ISLNK(stbuf
->st_mode
)) {
919 mode
|= P9_STAT_MODE_SYMLINK
;
922 if (S_ISSOCK(stbuf
->st_mode
)) {
923 mode
|= P9_STAT_MODE_SOCKET
;
926 if (S_ISFIFO(stbuf
->st_mode
)) {
927 mode
|= P9_STAT_MODE_NAMED_PIPE
;
930 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
931 mode
|= P9_STAT_MODE_DEVICE
;
934 if (stbuf
->st_mode
& S_ISUID
) {
935 mode
|= P9_STAT_MODE_SETUID
;
938 if (stbuf
->st_mode
& S_ISGID
) {
939 mode
|= P9_STAT_MODE_SETGID
;
942 if (stbuf
->st_mode
& S_ISVTX
) {
943 mode
|= P9_STAT_MODE_SETVTX
;
949 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
950 const struct stat
*stbuf
,
956 memset(v9stat
, 0, sizeof(*v9stat
));
958 stat_to_qid(stbuf
, &v9stat
->qid
);
959 v9stat
->mode
= stat_to_v9mode(stbuf
);
960 v9stat
->atime
= stbuf
->st_atime
;
961 v9stat
->mtime
= stbuf
->st_mtime
;
962 v9stat
->length
= stbuf
->st_size
;
964 v9fs_string_null(&v9stat
->uid
);
965 v9fs_string_null(&v9stat
->gid
);
966 v9fs_string_null(&v9stat
->muid
);
968 v9stat
->n_uid
= stbuf
->st_uid
;
969 v9stat
->n_gid
= stbuf
->st_gid
;
972 v9fs_string_null(&v9stat
->extension
);
974 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
975 err
= v9fs_co_readlink(s
, name
, &v9stat
->extension
);
979 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
980 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
981 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
982 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
983 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
984 v9fs_string_sprintf(&v9stat
->extension
, "%s %lu",
985 "HARDLINKCOUNT", (unsigned long)stbuf
->st_nlink
);
988 str
= strrchr(name
->data
, '/');
995 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
998 v9fs_string_size(&v9stat
->name
) +
999 v9fs_string_size(&v9stat
->uid
) +
1000 v9fs_string_size(&v9stat
->gid
) +
1001 v9fs_string_size(&v9stat
->muid
) +
1002 v9fs_string_size(&v9stat
->extension
);
1006 #define P9_STATS_MODE 0x00000001ULL
1007 #define P9_STATS_NLINK 0x00000002ULL
1008 #define P9_STATS_UID 0x00000004ULL
1009 #define P9_STATS_GID 0x00000008ULL
1010 #define P9_STATS_RDEV 0x00000010ULL
1011 #define P9_STATS_ATIME 0x00000020ULL
1012 #define P9_STATS_MTIME 0x00000040ULL
1013 #define P9_STATS_CTIME 0x00000080ULL
1014 #define P9_STATS_INO 0x00000100ULL
1015 #define P9_STATS_SIZE 0x00000200ULL
1016 #define P9_STATS_BLOCKS 0x00000400ULL
1018 #define P9_STATS_BTIME 0x00000800ULL
1019 #define P9_STATS_GEN 0x00001000ULL
1020 #define P9_STATS_DATA_VERSION 0x00002000ULL
1022 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1023 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1026 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1027 V9fsStatDotl
*v9lstat
)
1029 memset(v9lstat
, 0, sizeof(*v9lstat
));
1031 v9lstat
->st_mode
= stbuf
->st_mode
;
1032 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1033 v9lstat
->st_uid
= stbuf
->st_uid
;
1034 v9lstat
->st_gid
= stbuf
->st_gid
;
1035 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1036 v9lstat
->st_size
= stbuf
->st_size
;
1037 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1038 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1039 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1040 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1041 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1042 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1043 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1044 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1045 /* Currently we only support BASIC fields in stat */
1046 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1048 stat_to_qid(stbuf
, &v9lstat
->qid
);
1051 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1053 while (len
&& *iovcnt
) {
1054 if (len
< sg
->iov_len
) {
1056 sg
->iov_base
+= len
;
1068 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1073 for (i
= 0; i
< *cnt
; i
++) {
1074 if ((total
+ sg
[i
].iov_len
) > cap
) {
1075 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1079 total
+= sg
[i
].iov_len
;
1087 static void print_sg(struct iovec
*sg
, int cnt
)
1091 printf("sg[%d]: {", cnt
);
1092 for (i
= 0; i
< cnt
; i
++) {
1096 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1101 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1104 v9fs_string_init(&str
);
1105 v9fs_string_copy(&str
, dst
);
1106 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1107 v9fs_string_free(&str
);
1110 static void v9fs_version(void *opaque
)
1112 V9fsPDU
*pdu
= opaque
;
1113 V9fsState
*s
= pdu
->s
;
1117 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1119 if (!strcmp(version
.data
, "9P2000.u")) {
1120 s
->proto_version
= V9FS_PROTO_2000U
;
1121 } else if (!strcmp(version
.data
, "9P2000.L")) {
1122 s
->proto_version
= V9FS_PROTO_2000L
;
1124 v9fs_string_sprintf(&version
, "unknown");
1127 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1128 complete_pdu(s
, pdu
, offset
);
1130 v9fs_string_free(&version
);
1134 static void v9fs_attach(void *opaque
)
1136 V9fsPDU
*pdu
= opaque
;
1137 V9fsState
*s
= pdu
->s
;
1138 int32_t fid
, afid
, n_uname
;
1139 V9fsString uname
, aname
;
1145 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1147 fidp
= alloc_fid(s
, fid
);
1153 fidp
->uid
= n_uname
;
1155 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1156 err
= fid_to_qid(s
, fidp
, &qid
);
1163 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1167 complete_pdu(s
, pdu
, err
);
1168 v9fs_string_free(&uname
);
1169 v9fs_string_free(&aname
);
1172 static void v9fs_stat(void *opaque
)
1180 V9fsPDU
*pdu
= opaque
;
1181 V9fsState
*s
= pdu
->s
;
1183 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1184 fidp
= lookup_fid(s
, fid
);
1189 err
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1193 err
= stat_to_v9stat(s
, &fidp
->path
, &stbuf
, &v9stat
);
1197 offset
+= pdu_marshal(pdu
, offset
, "wS", 0, &v9stat
);
1199 v9fs_stat_free(&v9stat
);
1201 complete_pdu(s
, pdu
, err
);
1204 static void v9fs_getattr(void *opaque
)
1211 uint64_t request_mask
;
1212 V9fsStatDotl v9stat_dotl
;
1213 V9fsPDU
*pdu
= opaque
;
1214 V9fsState
*s
= pdu
->s
;
1216 pdu_unmarshal(pdu
, offset
, "dq", &fid
, &request_mask
);
1218 fidp
= lookup_fid(s
, fid
);
1224 * Currently we only support BASIC fields in stat, so there is no
1225 * need to look at request_mask.
1227 retval
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1231 stat_to_v9stat_dotl(s
, &stbuf
, &v9stat_dotl
);
1233 retval
+= pdu_marshal(pdu
, offset
, "A", &v9stat_dotl
);
1235 complete_pdu(s
, pdu
, retval
);
1238 /* From Linux kernel code */
1239 #define ATTR_MODE (1 << 0)
1240 #define ATTR_UID (1 << 1)
1241 #define ATTR_GID (1 << 2)
1242 #define ATTR_SIZE (1 << 3)
1243 #define ATTR_ATIME (1 << 4)
1244 #define ATTR_MTIME (1 << 5)
1245 #define ATTR_CTIME (1 << 6)
1246 #define ATTR_MASK 127
1247 #define ATTR_ATIME_SET (1 << 7)
1248 #define ATTR_MTIME_SET (1 << 8)
1250 static void v9fs_setattr(void *opaque
)
1257 V9fsPDU
*pdu
= opaque
;
1258 V9fsState
*s
= pdu
->s
;
1260 pdu_unmarshal(pdu
, offset
, "dI", &fid
, &v9iattr
);
1262 fidp
= lookup_fid(s
, fid
);
1267 if (v9iattr
.valid
& ATTR_MODE
) {
1268 err
= v9fs_co_chmod(s
, &fidp
->path
, v9iattr
.mode
);
1273 if (v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1274 struct timespec times
[2];
1275 if (v9iattr
.valid
& ATTR_ATIME
) {
1276 if (v9iattr
.valid
& ATTR_ATIME_SET
) {
1277 times
[0].tv_sec
= v9iattr
.atime_sec
;
1278 times
[0].tv_nsec
= v9iattr
.atime_nsec
;
1280 times
[0].tv_nsec
= UTIME_NOW
;
1283 times
[0].tv_nsec
= UTIME_OMIT
;
1285 if (v9iattr
.valid
& ATTR_MTIME
) {
1286 if (v9iattr
.valid
& ATTR_MTIME_SET
) {
1287 times
[1].tv_sec
= v9iattr
.mtime_sec
;
1288 times
[1].tv_nsec
= v9iattr
.mtime_nsec
;
1290 times
[1].tv_nsec
= UTIME_NOW
;
1293 times
[1].tv_nsec
= UTIME_OMIT
;
1295 err
= v9fs_co_utimensat(s
, &fidp
->path
, times
);
1301 * If the only valid entry in iattr is ctime we can call
1302 * chown(-1,-1) to update the ctime of the file
1304 if ((v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1305 ((v9iattr
.valid
& ATTR_CTIME
)
1306 && !((v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1307 if (!(v9iattr
.valid
& ATTR_UID
)) {
1310 if (!(v9iattr
.valid
& ATTR_GID
)) {
1313 err
= v9fs_co_chown(s
, &fidp
->path
, v9iattr
.uid
,
1319 if (v9iattr
.valid
& (ATTR_SIZE
)) {
1320 err
= v9fs_co_truncate(s
, &fidp
->path
, v9iattr
.size
);
1327 complete_pdu(s
, pdu
, err
);
1330 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1332 complete_pdu(s
, vs
->pdu
, err
);
1334 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1335 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1336 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1344 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1348 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1350 for (i
= 0; i
< vs
->nwnames
; i
++) {
1351 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1355 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1359 free_fid(s
, vs
->newfidp
->fid
);
1360 v9fs_string_free(&vs
->path
);
1365 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1368 if (vs
->name_idx
< vs
->nwnames
) {
1369 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1370 vs
->wnames
[vs
->name_idx
].data
);
1371 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1373 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1374 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1378 v9fs_string_free(&vs
->path
);
1379 v9fs_walk_marshal(vs
);
1382 v9fs_walk_complete(s
, vs
, err
);
1385 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1389 v9fs_string_free(&vs
->path
);
1394 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1396 if (vs
->name_idx
< vs
->nwnames
) {
1398 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1399 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1400 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1402 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1403 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1407 v9fs_string_free(&vs
->path
);
1408 v9fs_walk_marshal(vs
);
1411 v9fs_walk_complete(s
, vs
, err
);
1414 static void v9fs_walk(void *opaque
)
1416 V9fsPDU
*pdu
= opaque
;
1417 V9fsState
*s
= pdu
->s
;
1418 int32_t fid
, newfid
;
1423 vs
= g_malloc(sizeof(*vs
));
1429 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1430 &newfid
, &vs
->nwnames
);
1432 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1433 vs
->wnames
= g_malloc0(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1435 vs
->qids
= g_malloc0(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1437 for (i
= 0; i
< vs
->nwnames
; i
++) {
1438 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1441 } else if (vs
->nwnames
> P9_MAXWELEM
) {
1446 vs
->fidp
= lookup_fid(s
, fid
);
1447 if (vs
->fidp
== NULL
) {
1452 /* FIXME: is this really valid? */
1453 if (fid
== newfid
) {
1455 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1456 v9fs_string_init(&vs
->path
);
1459 if (vs
->name_idx
< vs
->nwnames
) {
1460 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1461 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1462 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1464 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1465 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1469 vs
->newfidp
= alloc_fid(s
, newfid
);
1470 if (vs
->newfidp
== NULL
) {
1475 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1476 v9fs_string_init(&vs
->path
);
1478 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1480 if (vs
->name_idx
< vs
->nwnames
) {
1481 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1482 vs
->wnames
[vs
->name_idx
].data
);
1483 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1485 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1486 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1491 v9fs_walk_marshal(vs
);
1494 v9fs_walk_complete(s
, vs
, err
);
1497 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1499 struct statfs stbuf
;
1503 * iounit should be multiples of f_bsize (host filesystem block size
1504 * and as well as less than (client msize - P9_IOHDRSZ))
1506 if (!v9fs_co_statfs(s
, name
, &stbuf
)) {
1507 iounit
= stbuf
.f_bsize
;
1508 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1511 iounit
= s
->msize
- P9_IOHDRSZ
;
1516 static void v9fs_open(void *opaque
)
1527 V9fsPDU
*pdu
= opaque
;
1528 V9fsState
*s
= pdu
->s
;
1530 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1531 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &mode
);
1533 pdu_unmarshal(pdu
, offset
, "db", &fid
, &mode
);
1535 fidp
= lookup_fid(s
, fid
);
1540 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
1542 err
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1546 stat_to_qid(&stbuf
, &qid
);
1547 if (S_ISDIR(stbuf
.st_mode
)) {
1548 err
= v9fs_co_opendir(s
, fidp
);
1552 fidp
->fid_type
= P9_FID_DIR
;
1553 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, 0);
1556 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1558 flags
&= ~(O_NOCTTY
| O_ASYNC
| O_CREAT
);
1559 /* Ignore direct disk access hint until the server supports it. */
1562 flags
= omode_to_uflags(mode
);
1564 err
= v9fs_co_open(s
, fidp
, flags
);
1568 fidp
->fid_type
= P9_FID_FILE
;
1569 iounit
= get_iounit(s
, &fidp
->path
);
1570 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
1574 complete_pdu(s
, pdu
, err
);
1577 static void v9fs_lcreate(void *opaque
)
1579 int32_t dfid
, flags
, mode
;
1583 V9fsString fullname
;
1589 V9fsPDU
*pdu
= opaque
;
1591 v9fs_string_init(&fullname
);
1592 pdu_unmarshal(pdu
, offset
, "dsddd", &dfid
, &name
, &flags
,
1595 fidp
= lookup_fid(pdu
->s
, dfid
);
1600 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
1602 /* Ignore direct disk access hint until the server supports it. */
1605 err
= v9fs_co_open2(pdu
->s
, fidp
, fullname
.data
, gid
, flags
, mode
);
1609 fidp
->fid_type
= P9_FID_FILE
;
1610 iounit
= get_iounit(pdu
->s
, &fullname
);
1612 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
1614 fidp
->fid_type
= P9_FID_NONE
;
1615 if (fidp
->fs
.fd
> 0) {
1620 v9fs_string_copy(&fidp
->path
, &fullname
);
1621 stat_to_qid(&stbuf
, &qid
);
1622 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
1625 complete_pdu(pdu
->s
, pdu
, err
);
1626 v9fs_string_free(&name
);
1627 v9fs_string_free(&fullname
);
1630 static void v9fs_post_do_fsync(V9fsState
*s
, V9fsPDU
*pdu
, int err
)
1635 complete_pdu(s
, pdu
, err
);
1638 static void v9fs_fsync(void *opaque
)
1640 V9fsPDU
*pdu
= opaque
;
1641 V9fsState
*s
= pdu
->s
;
1648 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &datasync
);
1649 fidp
= lookup_fid(s
, fid
);
1652 v9fs_post_do_fsync(s
, pdu
, err
);
1655 err
= v9fs_do_fsync(s
, fidp
->fs
.fd
, datasync
);
1656 v9fs_post_do_fsync(s
, pdu
, err
);
1659 static void v9fs_clunk(void *opaque
)
1661 V9fsPDU
*pdu
= opaque
;
1662 V9fsState
*s
= pdu
->s
;
1667 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1669 err
= free_fid(s
, fid
);
1677 complete_pdu(s
, pdu
, err
);
1680 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1682 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1687 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1688 vs
->offset
+= vs
->count
;
1691 complete_pdu(s
, vs
->pdu
, err
);
1692 v9fs_stat_free(&vs
->v9stat
);
1693 v9fs_string_free(&vs
->name
);
1698 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1705 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1710 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1712 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1713 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1714 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1715 v9fs_read_post_seekdir(s
, vs
, err
);
1718 vs
->count
+= vs
->len
;
1719 v9fs_stat_free(&vs
->v9stat
);
1720 v9fs_string_free(&vs
->name
);
1721 vs
->dir_pos
= vs
->dent
->d_off
;
1722 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1723 v9fs_read_post_readdir(s
, vs
, err
);
1726 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1727 v9fs_read_post_seekdir(s
, vs
, err
);
1732 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1735 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1736 v9fs_string_init(&vs
->name
);
1737 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1739 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1740 v9fs_read_post_dir_lstat(s
, vs
, err
);
1744 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1745 vs
->offset
+= vs
->count
;
1747 complete_pdu(s
, vs
->pdu
, err
);
1752 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1754 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1755 v9fs_read_post_readdir(s
, vs
, err
);
1759 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1762 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
1763 v9fs_read_post_telldir(s
, vs
, err
);
1767 static void v9fs_read_post_preadv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1770 /* IO error return the error */
1774 vs
->total
+= vs
->len
;
1775 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1776 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1779 print_sg(vs
->sg
, vs
->cnt
);
1781 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1786 } while (vs
->len
== -1 && errno
== EINTR
);
1787 if (vs
->len
== -1) {
1790 v9fs_read_post_preadv(s
, vs
, err
);
1793 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1794 vs
->offset
+= vs
->count
;
1798 complete_pdu(s
, vs
->pdu
, err
);
1802 static void v9fs_xattr_read(V9fsState
*s
, V9fsReadState
*vs
)
1808 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
1809 read_count
= xattr_len
- vs
->off
;
1810 if (read_count
> vs
->count
) {
1811 read_count
= vs
->count
;
1812 } else if (read_count
< 0) {
1814 * read beyond XATTR value
1818 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", read_count
);
1819 vs
->offset
+= pdu_pack(vs
->pdu
, vs
->offset
,
1820 ((char *)vs
->fidp
->fs
.xattr
.value
) + vs
->off
,
1823 complete_pdu(s
, vs
->pdu
, err
);
1827 static void v9fs_read(void *opaque
)
1829 V9fsPDU
*pdu
= opaque
;
1830 V9fsState
*s
= pdu
->s
;
1835 vs
= g_malloc(sizeof(*vs
));
1842 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1844 vs
->fidp
= lookup_fid(s
, fid
);
1845 if (vs
->fidp
== NULL
) {
1850 if (vs
->fidp
->fid_type
== P9_FID_DIR
) {
1851 vs
->max_count
= vs
->count
;
1854 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
1856 v9fs_read_post_rewinddir(s
, vs
, err
);
1858 } else if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
1860 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
1861 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1862 if (vs
->total
<= vs
->count
) {
1863 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1869 v9fs_read_post_preadv(s
, vs
, err
);
1872 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
1873 v9fs_xattr_read(s
, vs
);
1879 complete_pdu(s
, pdu
, err
);
1883 static size_t v9fs_readdir_data_size(V9fsString
*name
)
1886 * Size of each dirent on the wire: size of qid (13) + size of offset (8)
1887 * size of type (1) + size of name.size (2) + strlen(name.data)
1889 return 24 + v9fs_string_size(name
);
1892 static int v9fs_do_readdir(V9fsState
*s
, V9fsPDU
*pdu
,
1893 V9fsFidState
*fidp
, int32_t max_count
)
1900 off_t saved_dir_pos
;
1901 struct dirent
*dent
;
1903 /* save the directory position */
1904 saved_dir_pos
= v9fs_co_telldir(s
, fidp
);
1905 if (saved_dir_pos
< 0) {
1906 return saved_dir_pos
;
1909 err
= v9fs_co_readdir(s
, fidp
, &dent
);
1913 v9fs_string_init(&name
);
1914 v9fs_string_sprintf(&name
, "%s", dent
->d_name
);
1915 if ((count
+ v9fs_readdir_data_size(&name
)) > max_count
) {
1916 /* Ran out of buffer. Set dir back to old position and return */
1917 v9fs_co_seekdir(s
, fidp
, saved_dir_pos
);
1918 v9fs_string_free(&name
);
1922 * Fill up just the path field of qid because the client uses
1923 * only that. To fill the entire qid structure we will have
1924 * to stat each dirent found, which is expensive
1926 size
= MIN(sizeof(dent
->d_ino
), sizeof(qid
.path
));
1927 memcpy(&qid
.path
, &dent
->d_ino
, size
);
1928 /* Fill the other fields with dummy values */
1932 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
1933 len
= pdu_marshal(pdu
, 11 + count
, "Qqbs",
1935 dent
->d_type
, &name
);
1937 v9fs_string_free(&name
);
1938 saved_dir_pos
= dent
->d_off
;
1946 static void v9fs_readdir(void *opaque
)
1952 int64_t initial_offset
;
1953 int32_t count
, max_count
;
1954 V9fsPDU
*pdu
= opaque
;
1955 V9fsState
*s
= pdu
->s
;
1957 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &initial_offset
, &max_count
);
1959 fidp
= lookup_fid(s
, fid
);
1960 if (fidp
== NULL
|| !fidp
->fs
.dir
) {
1964 if (initial_offset
== 0) {
1965 v9fs_co_rewinddir(s
, fidp
);
1967 v9fs_co_seekdir(s
, fidp
, initial_offset
);
1969 count
= v9fs_do_readdir(s
, pdu
, fidp
, max_count
);
1975 retval
+= pdu_marshal(pdu
, offset
, "d", count
);
1978 complete_pdu(s
, pdu
, retval
);
1981 static void v9fs_write_post_pwritev(V9fsState
*s
, V9fsWriteState
*vs
,
1985 /* IO error return the error */
1989 vs
->total
+= vs
->len
;
1990 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1991 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1994 print_sg(vs
->sg
, vs
->cnt
);
1996 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2001 } while (vs
->len
== -1 && errno
== EINTR
);
2002 if (vs
->len
== -1) {
2005 v9fs_write_post_pwritev(s
, vs
, err
);
2008 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2011 complete_pdu(s
, vs
->pdu
, err
);
2015 static void v9fs_xattr_write(V9fsState
*s
, V9fsWriteState
*vs
)
2022 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2023 write_count
= xattr_len
- vs
->off
;
2024 if (write_count
> vs
->count
) {
2025 write_count
= vs
->count
;
2026 } else if (write_count
< 0) {
2028 * write beyond XATTR value len specified in
2034 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", write_count
);
2036 vs
->fidp
->fs
.xattr
.copied_len
+= write_count
;
2038 * Now copy the content from sg list
2040 for (i
= 0; i
< vs
->cnt
; i
++) {
2041 if (write_count
> vs
->sg
[i
].iov_len
) {
2042 to_copy
= vs
->sg
[i
].iov_len
;
2044 to_copy
= write_count
;
2046 memcpy((char *)vs
->fidp
->fs
.xattr
.value
+ vs
->off
,
2047 vs
->sg
[i
].iov_base
, to_copy
);
2048 /* updating vs->off since we are not using below */
2050 write_count
-= to_copy
;
2053 complete_pdu(s
, vs
->pdu
, err
);
2057 static void v9fs_write(void *opaque
)
2059 V9fsPDU
*pdu
= opaque
;
2060 V9fsState
*s
= pdu
->s
;
2065 vs
= g_malloc(sizeof(*vs
));
2073 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2076 vs
->fidp
= lookup_fid(s
, fid
);
2077 if (vs
->fidp
== NULL
) {
2082 if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2083 if (vs
->fidp
->fs
.fd
== -1) {
2087 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2089 * setxattr operation
2091 v9fs_xattr_write(s
, vs
);
2097 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2098 if (vs
->total
<= vs
->count
) {
2099 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
, vs
->off
);
2104 v9fs_write_post_pwritev(s
, vs
, err
);
2108 complete_pdu(s
, vs
->pdu
, err
);
2112 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2115 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2116 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2118 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2121 complete_pdu(s
, vs
->pdu
, err
);
2122 v9fs_string_free(&vs
->name
);
2123 v9fs_string_free(&vs
->extension
);
2124 v9fs_string_free(&vs
->fullname
);
2128 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2131 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2132 v9fs_create_post_getiounit(s
, vs
);
2136 complete_pdu(s
, vs
->pdu
, err
);
2137 v9fs_string_free(&vs
->name
);
2138 v9fs_string_free(&vs
->extension
);
2139 v9fs_string_free(&vs
->fullname
);
2143 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2148 v9fs_post_create(s
, vs
, err
);
2151 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2154 if (!vs
->fidp
->fs
.dir
) {
2157 vs
->fidp
->fid_type
= P9_FID_DIR
;
2158 v9fs_post_create(s
, vs
, err
);
2161 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2169 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2170 v9fs_create_post_opendir(s
, vs
, err
);
2174 v9fs_post_create(s
, vs
, err
);
2177 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2183 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2184 v9fs_create_post_dir_lstat(s
, vs
, err
);
2188 v9fs_post_create(s
, vs
, err
);
2191 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2194 vs
->fidp
->fid_type
= P9_FID_NONE
;
2195 close(vs
->fidp
->fs
.fd
);
2198 v9fs_post_create(s
, vs
, err
);
2202 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2207 vs
->fidp
->fid_type
= P9_FID_FILE
;
2208 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
2209 v9fs_create_post_fstat(s
, vs
, err
);
2214 v9fs_post_create(s
, vs
, err
);
2218 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2221 if (err
== 0 || errno
!= ENOENT
) {
2226 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2227 err
= v9fs_co_mkdir(s
, vs
->fullname
.data
, vs
->perm
& 0777,
2229 v9fs_create_post_mkdir(s
, vs
, err
);
2230 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2231 err
= v9fs_do_symlink(s
, vs
->fidp
, vs
->extension
.data
,
2232 vs
->fullname
.data
, -1);
2233 v9fs_create_post_perms(s
, vs
, err
);
2234 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2235 int32_t nfid
= atoi(vs
->extension
.data
);
2236 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2237 if (nfidp
== NULL
) {
2239 v9fs_post_create(s
, vs
, err
);
2241 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2242 v9fs_create_post_perms(s
, vs
, err
);
2243 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2245 uint32_t major
, minor
;
2248 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2251 v9fs_post_create(s
, vs
, err
);
2263 v9fs_post_create(s
, vs
, err
);
2266 nmode
|= vs
->perm
& 0777;
2267 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, nmode
,
2268 makedev(major
, minor
), vs
->fidp
->uid
, -1);
2269 v9fs_create_post_perms(s
, vs
, err
);
2270 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2271 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFIFO
| (vs
->perm
& 0777),
2272 0, vs
->fidp
->uid
, -1);
2273 v9fs_post_create(s
, vs
, err
);
2274 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2275 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFSOCK
| (vs
->perm
& 0777),
2276 0, vs
->fidp
->uid
, -1);
2277 v9fs_post_create(s
, vs
, err
);
2279 err
= v9fs_co_open2(s
, vs
->fidp
, vs
->fullname
.data
, -1,
2280 omode_to_uflags(vs
->mode
)|O_CREAT
, vs
->perm
);
2282 v9fs_create_post_open2(s
, vs
, err
);
2288 v9fs_post_create(s
, vs
, err
);
2291 static void v9fs_create(void *opaque
)
2293 V9fsPDU
*pdu
= opaque
;
2294 V9fsState
*s
= pdu
->s
;
2296 V9fsCreateState
*vs
;
2299 vs
= g_malloc(sizeof(*vs
));
2303 v9fs_string_init(&vs
->fullname
);
2305 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2306 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2308 vs
->fidp
= lookup_fid(s
, fid
);
2309 if (vs
->fidp
== NULL
) {
2314 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2317 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2318 v9fs_create_post_lstat(s
, vs
, err
);
2322 complete_pdu(s
, vs
->pdu
, err
);
2323 v9fs_string_free(&vs
->name
);
2324 v9fs_string_free(&vs
->extension
);
2328 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2331 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2332 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2337 complete_pdu(s
, vs
->pdu
, err
);
2338 v9fs_string_free(&vs
->name
);
2339 v9fs_string_free(&vs
->symname
);
2340 v9fs_string_free(&vs
->fullname
);
2344 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2350 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2352 v9fs_post_symlink(s
, vs
, err
);
2355 static void v9fs_symlink(void *opaque
)
2357 V9fsPDU
*pdu
= opaque
;
2358 V9fsState
*s
= pdu
->s
;
2360 V9fsSymlinkState
*vs
;
2364 vs
= g_malloc(sizeof(*vs
));
2368 v9fs_string_init(&vs
->fullname
);
2370 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2371 &vs
->symname
, &gid
);
2373 vs
->dfidp
= lookup_fid(s
, dfid
);
2374 if (vs
->dfidp
== NULL
) {
2379 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2381 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2382 vs
->fullname
.data
, gid
);
2383 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2387 complete_pdu(s
, vs
->pdu
, err
);
2388 v9fs_string_free(&vs
->name
);
2389 v9fs_string_free(&vs
->symname
);
2393 static void v9fs_flush(void *opaque
)
2395 V9fsPDU
*pdu
= opaque
;
2396 V9fsState
*s
= pdu
->s
;
2397 /* A nop call with no return */
2398 complete_pdu(s
, pdu
, 7);
2402 static void v9fs_link(void *opaque
)
2404 V9fsPDU
*pdu
= opaque
;
2405 V9fsState
*s
= pdu
->s
;
2406 int32_t dfid
, oldfid
;
2407 V9fsFidState
*dfidp
, *oldfidp
;
2408 V9fsString name
, fullname
;
2412 v9fs_string_init(&fullname
);
2414 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2416 dfidp
= lookup_fid(s
, dfid
);
2417 if (dfidp
== NULL
) {
2422 oldfidp
= lookup_fid(s
, oldfid
);
2423 if (oldfidp
== NULL
) {
2428 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2430 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2434 v9fs_string_free(&fullname
);
2437 v9fs_string_free(&name
);
2438 complete_pdu(s
, pdu
, err
);
2441 static void v9fs_remove(void *opaque
)
2447 V9fsPDU
*pdu
= opaque
;
2449 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2451 fidp
= lookup_fid(pdu
->s
, fid
);
2456 err
= v9fs_co_remove(pdu
->s
, &fidp
->path
);
2461 /* For TREMOVE we need to clunk the fid even on failed remove */
2462 free_fid(pdu
->s
, fidp
->fid
);
2464 complete_pdu(pdu
->s
, pdu
, err
);
2467 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2476 v9fs_stat_free(&vs
->v9stat
);
2477 complete_pdu(s
, vs
->pdu
, err
);
2481 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2486 if (vs
->v9stat
.length
!= -1) {
2487 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2491 v9fs_wstat_post_truncate(s
, vs
, err
);
2495 v9fs_stat_free(&vs
->v9stat
);
2496 complete_pdu(s
, vs
->pdu
, err
);
2500 static int v9fs_complete_rename(V9fsState
*s
, V9fsFidState
*fidp
,
2501 int32_t newdirfid
, V9fsString
*name
)
2505 char *old_name
, *new_name
;
2507 if (newdirfid
!= -1) {
2508 V9fsFidState
*dirfidp
;
2509 dirfidp
= lookup_fid(s
, newdirfid
);
2510 if (dirfidp
== NULL
) {
2514 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2516 new_name
= g_malloc0(dirfidp
->path
.size
+ name
->size
+ 2);
2518 strcpy(new_name
, dirfidp
->path
.data
);
2519 strcat(new_name
, "/");
2520 strcat(new_name
+ dirfidp
->path
.size
, name
->data
);
2522 old_name
= fidp
->path
.data
;
2523 end
= strrchr(old_name
, '/');
2529 new_name
= g_malloc0(end
- old_name
+ name
->size
+ 1);
2531 strncat(new_name
, old_name
, end
- old_name
);
2532 strncat(new_name
+ (end
- old_name
), name
->data
, name
->size
);
2535 v9fs_string_free(name
);
2536 name
->data
= new_name
;
2537 name
->size
= strlen(new_name
);
2539 if (strcmp(new_name
, fidp
->path
.data
) != 0) {
2540 err
= v9fs_co_rename(s
, &fidp
->path
, name
);
2544 V9fsFidState
*tfidp
;
2546 * Fixup fid's pointing to the old name to
2547 * start pointing to the new name
2549 for (tfidp
= s
->fid_list
; tfidp
; tfidp
= tfidp
->next
) {
2550 if (fidp
== tfidp
) {
2552 * we replace name of this fid towards the end
2553 * so that our below strcmp will work
2557 if (v9fs_path_is_ancestor(&fidp
->path
, &tfidp
->path
)) {
2558 /* replace the name */
2559 v9fs_fix_path(&tfidp
->path
, name
, strlen(fidp
->path
.data
));
2562 v9fs_string_copy(&fidp
->path
, name
);
2568 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2574 if (vs
->v9stat
.name
.size
!= 0) {
2575 err
= v9fs_complete_rename(s
, vs
->fidp
, -1, &vs
->v9stat
.name
);
2577 v9fs_wstat_post_rename(s
, vs
, err
);
2581 v9fs_stat_free(&vs
->v9stat
);
2582 complete_pdu(s
, vs
->pdu
, err
);
2586 static void v9fs_rename(void *opaque
)
2594 V9fsPDU
*pdu
= opaque
;
2595 V9fsState
*s
= pdu
->s
;
2597 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newdirfid
, &name
);
2599 fidp
= lookup_fid(s
, fid
);
2604 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
2606 err
= v9fs_complete_rename(s
, fidp
, newdirfid
, &name
);
2611 complete_pdu(s
, pdu
, err
);
2612 v9fs_string_free(&name
);
2615 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2621 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2622 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2623 vs
->v9stat
.n_gid
)) {
2627 v9fs_wstat_post_chown(s
, vs
, err
);
2631 v9fs_stat_free(&vs
->v9stat
);
2632 complete_pdu(s
, vs
->pdu
, err
);
2636 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2642 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2643 struct timespec times
[2];
2644 if (vs
->v9stat
.atime
!= -1) {
2645 times
[0].tv_sec
= vs
->v9stat
.atime
;
2646 times
[0].tv_nsec
= 0;
2648 times
[0].tv_nsec
= UTIME_OMIT
;
2650 if (vs
->v9stat
.mtime
!= -1) {
2651 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2652 times
[1].tv_nsec
= 0;
2654 times
[1].tv_nsec
= UTIME_OMIT
;
2657 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2662 v9fs_wstat_post_utime(s
, vs
, err
);
2666 v9fs_stat_free(&vs
->v9stat
);
2667 complete_pdu(s
, vs
->pdu
, err
);
2671 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2676 v9fs_stat_free(&vs
->v9stat
);
2677 complete_pdu(s
, vs
->pdu
, err
);
2681 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2690 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2692 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2693 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2694 /* Attempting to change the type */
2699 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2700 &vs
->v9stat
.extension
))) {
2703 v9fs_wstat_post_chmod(s
, vs
, err
);
2707 v9fs_stat_free(&vs
->v9stat
);
2708 complete_pdu(s
, vs
->pdu
, err
);
2712 static void v9fs_wstat(void *opaque
)
2714 V9fsPDU
*pdu
= opaque
;
2715 V9fsState
*s
= pdu
->s
;
2720 vs
= g_malloc(sizeof(*vs
));
2724 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2726 vs
->fidp
= lookup_fid(s
, fid
);
2727 if (vs
->fidp
== NULL
) {
2732 /* do we need to sync the file? */
2733 if (donttouch_stat(&vs
->v9stat
)) {
2734 err
= v9fs_do_fsync(s
, vs
->fidp
->fs
.fd
, 0);
2735 v9fs_wstat_post_fsync(s
, vs
, err
);
2739 if (vs
->v9stat
.mode
!= -1) {
2740 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2741 v9fs_wstat_post_lstat(s
, vs
, err
);
2745 v9fs_wstat_post_chmod(s
, vs
, err
);
2749 v9fs_stat_free(&vs
->v9stat
);
2750 complete_pdu(s
, vs
->pdu
, err
);
2754 static int v9fs_fill_statfs(V9fsState
*s
, V9fsPDU
*pdu
, struct statfs
*stbuf
)
2766 int32_t bsize_factor
;
2769 * compute bsize factor based on host file system block size
2772 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/stbuf
->f_bsize
;
2773 if (!bsize_factor
) {
2776 f_type
= stbuf
->f_type
;
2777 f_bsize
= stbuf
->f_bsize
;
2778 f_bsize
*= bsize_factor
;
2780 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2781 * adjust(divide) the number of blocks, free blocks and available
2782 * blocks by bsize factor
2784 f_blocks
= stbuf
->f_blocks
/bsize_factor
;
2785 f_bfree
= stbuf
->f_bfree
/bsize_factor
;
2786 f_bavail
= stbuf
->f_bavail
/bsize_factor
;
2787 f_files
= stbuf
->f_files
;
2788 f_ffree
= stbuf
->f_ffree
;
2789 fsid_val
= (unsigned int) stbuf
->f_fsid
.__val
[0] |
2790 (unsigned long long)stbuf
->f_fsid
.__val
[1] << 32;
2791 f_namelen
= stbuf
->f_namelen
;
2793 return pdu_marshal(pdu
, offset
, "ddqqqqqqd",
2794 f_type
, f_bsize
, f_blocks
, f_bfree
,
2795 f_bavail
, f_files
, f_ffree
,
2796 fsid_val
, f_namelen
);
2799 static void v9fs_statfs(void *opaque
)
2805 struct statfs stbuf
;
2806 V9fsPDU
*pdu
= opaque
;
2807 V9fsState
*s
= pdu
->s
;
2809 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2810 fidp
= lookup_fid(s
, fid
);
2815 retval
= v9fs_co_statfs(s
, &fidp
->path
, &stbuf
);
2820 retval
+= v9fs_fill_statfs(s
, pdu
, &stbuf
);
2822 complete_pdu(s
, pdu
, retval
);
2826 static void v9fs_mknod(void *opaque
)
2838 V9fsString fullname
;
2840 V9fsPDU
*pdu
= opaque
;
2841 V9fsState
*s
= pdu
->s
;
2843 v9fs_string_init(&fullname
);
2844 pdu_unmarshal(pdu
, offset
, "dsdddd", &fid
, &name
, &mode
,
2845 &major
, &minor
, &gid
);
2847 fidp
= lookup_fid(s
, fid
);
2852 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
2853 err
= v9fs_co_mknod(s
, &fullname
, fidp
->uid
, gid
,
2854 makedev(major
, minor
), mode
);
2858 err
= v9fs_co_lstat(s
, &fullname
, &stbuf
);
2862 stat_to_qid(&stbuf
, &qid
);
2864 err
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2866 complete_pdu(s
, pdu
, err
);
2867 v9fs_string_free(&fullname
);
2868 v9fs_string_free(&name
);
2872 * Implement posix byte range locking code
2873 * Server side handling of locking code is very simple, because 9p server in
2874 * QEMU can handle only one client. And most of the lock handling
2875 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
2876 * do any thing in * qemu 9p server side lock code path.
2877 * So when a TLOCK request comes, always return success
2879 static void v9fs_lock(void *opaque
)
2886 int32_t fid
, err
= 0;
2887 V9fsPDU
*pdu
= opaque
;
2888 V9fsState
*s
= pdu
->s
;
2890 flock
= g_malloc(sizeof(*flock
));
2891 pdu_unmarshal(pdu
, offset
, "dbdqqds", &fid
, &flock
->type
,
2892 &flock
->flags
, &flock
->start
, &flock
->length
,
2893 &flock
->proc_id
, &flock
->client_id
);
2894 status
= P9_LOCK_ERROR
;
2896 /* We support only block flag now (that too ignored currently) */
2897 if (flock
->flags
& ~P9_LOCK_FLAGS_BLOCK
) {
2901 fidp
= lookup_fid(s
, fid
);
2906 err
= v9fs_co_fstat(s
, fidp
->fs
.fd
, &stbuf
);
2910 status
= P9_LOCK_SUCCESS
;
2913 err
+= pdu_marshal(pdu
, offset
, "b", status
);
2914 complete_pdu(s
, pdu
, err
);
2919 * When a TGETLOCK request comes, always return success because all lock
2920 * handling is done by client's VFS layer.
2922 static void v9fs_getlock(void *opaque
)
2928 int32_t fid
, err
= 0;
2929 V9fsPDU
*pdu
= opaque
;
2930 V9fsState
*s
= pdu
->s
;
2932 glock
= g_malloc(sizeof(*glock
));
2933 pdu_unmarshal(pdu
, offset
, "dbqqds", &fid
, &glock
->type
,
2934 &glock
->start
, &glock
->length
, &glock
->proc_id
,
2937 fidp
= lookup_fid(s
, fid
);
2942 err
= v9fs_co_fstat(s
, fidp
->fs
.fd
, &stbuf
);
2946 glock
->type
= F_UNLCK
;
2947 offset
+= pdu_marshal(pdu
, offset
, "bqqds", glock
->type
,
2948 glock
->start
, glock
->length
, glock
->proc_id
,
2952 complete_pdu(s
, pdu
, err
);
2956 static void v9fs_mkdir(void *opaque
)
2958 V9fsPDU
*pdu
= opaque
;
2962 V9fsString name
, fullname
;
2969 v9fs_string_init(&fullname
);
2970 pdu_unmarshal(pdu
, offset
, "dsdd", &fid
, &name
, &mode
, &gid
);
2972 fidp
= lookup_fid(pdu
->s
, fid
);
2977 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
2978 err
= v9fs_co_mkdir(pdu
->s
, fullname
.data
, mode
, fidp
->uid
, gid
);
2982 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
2986 stat_to_qid(&stbuf
, &qid
);
2987 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2990 complete_pdu(pdu
->s
, pdu
, err
);
2991 v9fs_string_free(&fullname
);
2992 v9fs_string_free(&name
);
2995 static void v9fs_xattrwalk(void *opaque
)
3001 int32_t fid
, newfid
;
3002 V9fsFidState
*file_fidp
;
3003 V9fsFidState
*xattr_fidp
;
3004 V9fsPDU
*pdu
= opaque
;
3005 V9fsState
*s
= pdu
->s
;
3007 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newfid
, &name
);
3008 file_fidp
= lookup_fid(s
, fid
);
3009 if (file_fidp
== NULL
) {
3013 xattr_fidp
= alloc_fid(s
, newfid
);
3014 if (xattr_fidp
== NULL
) {
3018 v9fs_string_copy(&xattr_fidp
->path
, &file_fidp
->path
);
3019 if (name
.data
[0] == 0) {
3021 * listxattr request. Get the size first
3023 size
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
, NULL
, 0);
3026 free_fid(s
, xattr_fidp
->fid
);
3030 * Read the xattr value
3032 xattr_fidp
->fs
.xattr
.len
= size
;
3033 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3034 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3036 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
3037 err
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
,
3038 xattr_fidp
->fs
.xattr
.value
,
3039 xattr_fidp
->fs
.xattr
.len
);
3041 free_fid(s
, xattr_fidp
->fid
);
3045 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3049 * specific xattr fid. We check for xattr
3050 * presence also collect the xattr size
3052 size
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
3056 free_fid(s
, xattr_fidp
->fid
);
3060 * Read the xattr value
3062 xattr_fidp
->fs
.xattr
.len
= size
;
3063 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3064 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3066 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
3067 err
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
3068 &name
, xattr_fidp
->fs
.xattr
.value
,
3069 xattr_fidp
->fs
.xattr
.len
);
3071 free_fid(s
, xattr_fidp
->fid
);
3075 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3079 complete_pdu(s
, pdu
, err
);
3080 v9fs_string_free(&name
);
3083 static void v9fs_xattrcreate(void *opaque
)
3091 V9fsFidState
*file_fidp
;
3092 V9fsFidState
*xattr_fidp
;
3093 V9fsPDU
*pdu
= opaque
;
3094 V9fsState
*s
= pdu
->s
;
3096 pdu_unmarshal(pdu
, offset
, "dsqd",
3097 &fid
, &name
, &size
, &flags
);
3099 file_fidp
= lookup_fid(s
, fid
);
3100 if (file_fidp
== NULL
) {
3104 /* Make the file fid point to xattr */
3105 xattr_fidp
= file_fidp
;
3106 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3107 xattr_fidp
->fs
.xattr
.copied_len
= 0;
3108 xattr_fidp
->fs
.xattr
.len
= size
;
3109 xattr_fidp
->fs
.xattr
.flags
= flags
;
3110 v9fs_string_init(&xattr_fidp
->fs
.xattr
.name
);
3111 v9fs_string_copy(&xattr_fidp
->fs
.xattr
.name
, &name
);
3113 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
3115 xattr_fidp
->fs
.xattr
.value
= NULL
;
3119 complete_pdu(s
, pdu
, err
);
3120 v9fs_string_free(&name
);
3123 static void v9fs_readlink(void *opaque
)
3125 V9fsPDU
*pdu
= opaque
;
3132 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3133 fidp
= lookup_fid(pdu
->s
, fid
);
3139 v9fs_string_init(&target
);
3140 err
= v9fs_co_readlink(pdu
->s
, &fidp
->path
, &target
);
3144 offset
+= pdu_marshal(pdu
, offset
, "s", &target
);
3146 v9fs_string_free(&target
);
3148 complete_pdu(pdu
->s
, pdu
, err
);
3151 static CoroutineEntry
*pdu_co_handlers
[] = {
3152 [P9_TREADDIR
] = v9fs_readdir
,
3153 [P9_TSTATFS
] = v9fs_statfs
,
3154 [P9_TGETATTR
] = v9fs_getattr
,
3155 [P9_TSETATTR
] = v9fs_setattr
,
3156 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
3157 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
3158 [P9_TMKNOD
] = v9fs_mknod
,
3159 [P9_TRENAME
] = v9fs_rename
,
3160 [P9_TLOCK
] = v9fs_lock
,
3161 [P9_TGETLOCK
] = v9fs_getlock
,
3162 [P9_TREADLINK
] = v9fs_readlink
,
3163 [P9_TMKDIR
] = v9fs_mkdir
,
3164 [P9_TVERSION
] = v9fs_version
,
3165 [P9_TLOPEN
] = v9fs_open
,
3166 [P9_TATTACH
] = v9fs_attach
,
3167 [P9_TSTAT
] = v9fs_stat
,
3168 [P9_TWALK
] = v9fs_walk
,
3169 [P9_TCLUNK
] = v9fs_clunk
,
3170 [P9_TFSYNC
] = v9fs_fsync
,
3171 [P9_TOPEN
] = v9fs_open
,
3172 [P9_TREAD
] = v9fs_read
,
3174 [P9_TAUTH
] = v9fs_auth
,
3176 [P9_TFLUSH
] = v9fs_flush
,
3177 [P9_TLINK
] = v9fs_link
,
3178 [P9_TSYMLINK
] = v9fs_symlink
,
3179 [P9_TCREATE
] = v9fs_create
,
3180 [P9_TLCREATE
] = v9fs_lcreate
,
3181 [P9_TWRITE
] = v9fs_write
,
3182 [P9_TWSTAT
] = v9fs_wstat
,
3183 [P9_TREMOVE
] = v9fs_remove
,
3186 static void v9fs_op_not_supp(void *opaque
)
3188 V9fsPDU
*pdu
= opaque
;
3189 complete_pdu(pdu
->s
, pdu
, -EOPNOTSUPP
);
3192 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3195 CoroutineEntry
*handler
;
3200 if (pdu
->id
>= ARRAY_SIZE(pdu_co_handlers
) ||
3201 (pdu_co_handlers
[pdu
->id
] == NULL
)) {
3202 handler
= v9fs_op_not_supp
;
3204 handler
= pdu_co_handlers
[pdu
->id
];
3206 co
= qemu_coroutine_create(handler
);
3207 qemu_coroutine_enter(co
, pdu
);
3210 void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3212 V9fsState
*s
= (V9fsState
*)vdev
;
3216 while ((pdu
= alloc_pdu(s
)) &&
3217 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3220 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3221 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3223 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3225 memcpy(&pdu
->size
, ptr
, 4);
3227 memcpy(&pdu
->tag
, ptr
+ 5, 2);