]>
git.proxmox.com Git - mirror_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 int v9fs_do_open(V9fsState
*s
, V9fsString
*path
, int flags
)
97 return s
->ops
->open(&s
->ctx
, path
->data
, flags
);
100 static DIR *v9fs_do_opendir(V9fsState
*s
, V9fsString
*path
)
102 return s
->ops
->opendir(&s
->ctx
, path
->data
);
105 static void v9fs_do_rewinddir(V9fsState
*s
, DIR *dir
)
107 return s
->ops
->rewinddir(&s
->ctx
, dir
);
110 static off_t
v9fs_do_telldir(V9fsState
*s
, DIR *dir
)
112 return s
->ops
->telldir(&s
->ctx
, dir
);
115 static void v9fs_do_seekdir(V9fsState
*s
, DIR *dir
, off_t off
)
117 return s
->ops
->seekdir(&s
->ctx
, dir
, off
);
120 static int v9fs_do_preadv(V9fsState
*s
, int fd
, const struct iovec
*iov
,
121 int iovcnt
, int64_t offset
)
123 return s
->ops
->preadv(&s
->ctx
, fd
, iov
, iovcnt
, offset
);
126 static int v9fs_do_pwritev(V9fsState
*s
, int fd
, const struct iovec
*iov
,
127 int iovcnt
, int64_t offset
)
129 return s
->ops
->pwritev(&s
->ctx
, fd
, iov
, iovcnt
, offset
);
132 static int v9fs_do_chmod(V9fsState
*s
, V9fsString
*path
, mode_t mode
)
137 return s
->ops
->chmod(&s
->ctx
, path
->data
, &cred
);
140 static int v9fs_do_mknod(V9fsState
*s
, char *name
,
141 mode_t mode
, dev_t dev
, uid_t uid
, gid_t gid
)
149 return s
->ops
->mknod(&s
->ctx
, name
, &cred
);
152 static int v9fs_do_fstat(V9fsState
*s
, int fd
, struct stat
*stbuf
)
154 return s
->ops
->fstat(&s
->ctx
, fd
, stbuf
);
157 static int v9fs_do_open2(V9fsState
*s
, char *fullname
, uid_t uid
, gid_t gid
,
165 cred
.fc_mode
= mode
& 07777;
167 return s
->ops
->open2(&s
->ctx
, fullname
, flags
, &cred
);
170 static int v9fs_do_symlink(V9fsState
*s
, V9fsFidState
*fidp
,
171 const char *oldpath
, const char *newpath
, gid_t gid
)
175 cred
.fc_uid
= fidp
->uid
;
179 return s
->ops
->symlink(&s
->ctx
, oldpath
, newpath
, &cred
);
182 static int v9fs_do_link(V9fsState
*s
, V9fsString
*oldpath
, V9fsString
*newpath
)
184 return s
->ops
->link(&s
->ctx
, oldpath
->data
, newpath
->data
);
187 static int v9fs_do_truncate(V9fsState
*s
, V9fsString
*path
, off_t size
)
189 return s
->ops
->truncate(&s
->ctx
, path
->data
, size
);
192 static int v9fs_do_chown(V9fsState
*s
, V9fsString
*path
, uid_t uid
, gid_t gid
)
199 return s
->ops
->chown(&s
->ctx
, path
->data
, &cred
);
202 static int v9fs_do_utimensat(V9fsState
*s
, V9fsString
*path
,
203 const struct timespec times
[2])
205 return s
->ops
->utimensat(&s
->ctx
, path
->data
, times
);
208 static int v9fs_do_fsync(V9fsState
*s
, int fd
, int datasync
)
210 return s
->ops
->fsync(&s
->ctx
, fd
, datasync
);
213 static int v9fs_do_statfs(V9fsState
*s
, V9fsString
*path
, struct statfs
*stbuf
)
215 return s
->ops
->statfs(&s
->ctx
, path
->data
, stbuf
);
218 static int v9fs_do_lsetxattr(V9fsState
*s
, V9fsString
*path
,
219 V9fsString
*xattr_name
,
220 void *value
, size_t size
, int flags
)
222 return s
->ops
->lsetxattr(&s
->ctx
, path
->data
,
223 xattr_name
->data
, value
, size
, flags
);
226 static int v9fs_do_lremovexattr(V9fsState
*s
, V9fsString
*path
,
227 V9fsString
*xattr_name
)
229 return s
->ops
->lremovexattr(&s
->ctx
, path
->data
,
234 static void v9fs_string_init(V9fsString
*str
)
240 static void v9fs_string_free(V9fsString
*str
)
242 qemu_free(str
->data
);
247 static void v9fs_string_null(V9fsString
*str
)
249 v9fs_string_free(str
);
252 static int number_to_string(void *arg
, char type
)
254 unsigned int ret
= 0;
258 unsigned int num
= *(unsigned int *)arg
;
267 unsigned long num
= *(unsigned long *)arg
;
275 printf("Number_to_string: Unknown number format\n");
282 static int GCC_FMT_ATTR(2, 0)
283 v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
286 char *iter
= (char *)fmt
;
290 unsigned int arg_uint
;
291 unsigned long arg_ulong
;
293 /* Find the number of %'s that denotes an argument */
294 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
299 len
= strlen(fmt
) - 2*nr_args
;
309 /* Now parse the format string */
310 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
314 arg_uint
= va_arg(ap2
, unsigned int);
315 len
+= number_to_string((void *)&arg_uint
, 'u');
318 if (*++iter
== 'u') {
319 arg_ulong
= va_arg(ap2
, unsigned long);
320 len
+= number_to_string((void *)&arg_ulong
, 'U');
326 arg_char_ptr
= va_arg(ap2
, char *);
327 len
+= strlen(arg_char_ptr
);
334 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
341 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
343 return vsprintf(*strp
, fmt
, ap
);
346 static void GCC_FMT_ATTR(2, 3)
347 v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
352 v9fs_string_free(str
);
355 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
362 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
364 v9fs_string_free(lhs
);
365 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
369 * Return TRUE if s1 is an ancestor of s2.
371 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
372 * As a special case, We treat s1 as ancestor of s2 if they are same!
374 static int v9fs_path_is_ancestor(V9fsString
*s1
, V9fsString
*s2
)
376 if (!strncmp(s1
->data
, s2
->data
, s1
->size
)) {
377 if (s2
->data
[s1
->size
] == '\0' || s2
->data
[s1
->size
] == '/') {
384 static size_t v9fs_string_size(V9fsString
*str
)
389 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
393 for (f
= s
->fid_list
; f
; f
= f
->next
) {
402 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
406 f
= lookup_fid(s
, fid
);
411 f
= qemu_mallocz(sizeof(V9fsFidState
));
414 f
->fid_type
= P9_FID_NONE
;
416 f
->next
= s
->fid_list
;
422 static int v9fs_xattr_fid_clunk(V9fsState
*s
, V9fsFidState
*fidp
)
426 if (fidp
->fs
.xattr
.copied_len
== -1) {
427 /* getxattr/listxattr fid */
431 * if this is fid for setxattr. clunk should
432 * result in setxattr localcall
434 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
435 /* clunk after partial write */
439 if (fidp
->fs
.xattr
.len
) {
440 retval
= v9fs_do_lsetxattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
441 fidp
->fs
.xattr
.value
,
443 fidp
->fs
.xattr
.flags
);
445 retval
= v9fs_do_lremovexattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
);
448 v9fs_string_free(&fidp
->fs
.xattr
.name
);
450 if (fidp
->fs
.xattr
.value
) {
451 qemu_free(fidp
->fs
.xattr
.value
);
456 static int free_fid(V9fsState
*s
, int32_t fid
)
459 V9fsFidState
**fidpp
, *fidp
;
461 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
462 if ((*fidpp
)->fid
== fid
) {
467 if (*fidpp
== NULL
) {
474 if (fidp
->fid_type
== P9_FID_FILE
) {
475 v9fs_do_close(s
, fidp
->fs
.fd
);
476 } else if (fidp
->fid_type
== P9_FID_DIR
) {
477 v9fs_do_closedir(s
, fidp
->fs
.dir
);
478 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
479 retval
= v9fs_xattr_fid_clunk(s
, fidp
);
481 v9fs_string_free(&fidp
->path
);
487 #define P9_QID_TYPE_DIR 0x80
488 #define P9_QID_TYPE_SYMLINK 0x02
490 #define P9_STAT_MODE_DIR 0x80000000
491 #define P9_STAT_MODE_APPEND 0x40000000
492 #define P9_STAT_MODE_EXCL 0x20000000
493 #define P9_STAT_MODE_MOUNT 0x10000000
494 #define P9_STAT_MODE_AUTH 0x08000000
495 #define P9_STAT_MODE_TMP 0x04000000
496 #define P9_STAT_MODE_SYMLINK 0x02000000
497 #define P9_STAT_MODE_LINK 0x01000000
498 #define P9_STAT_MODE_DEVICE 0x00800000
499 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
500 #define P9_STAT_MODE_SOCKET 0x00100000
501 #define P9_STAT_MODE_SETUID 0x00080000
502 #define P9_STAT_MODE_SETGID 0x00040000
503 #define P9_STAT_MODE_SETVTX 0x00010000
505 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
506 P9_STAT_MODE_SYMLINK | \
507 P9_STAT_MODE_LINK | \
508 P9_STAT_MODE_DEVICE | \
509 P9_STAT_MODE_NAMED_PIPE | \
512 /* This is the algorithm from ufs in spfs */
513 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
517 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
518 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
519 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
521 if (S_ISDIR(stbuf
->st_mode
)) {
522 qidp
->type
|= P9_QID_TYPE_DIR
;
524 if (S_ISLNK(stbuf
->st_mode
)) {
525 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
529 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
534 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
539 stat_to_qid(&stbuf
, qidp
);
543 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
547 if (!QLIST_EMPTY(&s
->free_list
)) {
548 pdu
= QLIST_FIRST(&s
->free_list
);
549 QLIST_REMOVE(pdu
, next
);
554 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
560 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
564 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
565 size_t offset
, size_t size
, int pack
)
570 for (i
= 0; size
&& i
< sg_count
; i
++) {
572 if (offset
>= sg
[i
].iov_len
) {
574 offset
-= sg
[i
].iov_len
;
577 len
= MIN(sg
[i
].iov_len
- offset
, size
);
579 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
581 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
596 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
598 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
602 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
605 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
609 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
613 struct iovec
*src_sg
;
617 src_sg
= pdu
->elem
.in_sg
;
618 num
= pdu
->elem
.in_num
;
620 src_sg
= pdu
->elem
.out_sg
;
621 num
= pdu
->elem
.out_num
;
625 for (i
= 0; i
< num
; i
++) {
627 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
628 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
630 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
631 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
632 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
633 sg
[j
].iov_base
+= (offset
- pos
);
634 sg
[j
].iov_len
-= (offset
- pos
);
637 pos
+= src_sg
[i
].iov_len
;
643 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
645 size_t old_offset
= offset
;
650 for (i
= 0; fmt
[i
]; i
++) {
653 uint8_t *valp
= va_arg(ap
, uint8_t *);
654 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
659 valp
= va_arg(ap
, uint16_t *);
660 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
661 *valp
= le16_to_cpu(val
);
666 valp
= va_arg(ap
, uint32_t *);
667 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
668 *valp
= le32_to_cpu(val
);
673 valp
= va_arg(ap
, uint64_t *);
674 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
675 *valp
= le64_to_cpu(val
);
679 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
680 int *iovcnt
= va_arg(ap
, int *);
681 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
685 V9fsString
*str
= va_arg(ap
, V9fsString
*);
686 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
687 /* FIXME: sanity check str->size */
688 str
->data
= qemu_malloc(str
->size
+ 1);
689 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
690 str
->data
[str
->size
] = 0;
694 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
695 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
696 &qidp
->type
, &qidp
->version
, &qidp
->path
);
700 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
701 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
702 &statp
->size
, &statp
->type
, &statp
->dev
,
703 &statp
->qid
, &statp
->mode
, &statp
->atime
,
704 &statp
->mtime
, &statp
->length
,
705 &statp
->name
, &statp
->uid
, &statp
->gid
,
706 &statp
->muid
, &statp
->extension
,
707 &statp
->n_uid
, &statp
->n_gid
,
712 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
713 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
714 &iattr
->valid
, &iattr
->mode
,
715 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
716 &iattr
->atime_sec
, &iattr
->atime_nsec
,
717 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
727 return offset
- old_offset
;
730 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
732 size_t old_offset
= offset
;
737 for (i
= 0; fmt
[i
]; i
++) {
740 uint8_t val
= va_arg(ap
, int);
741 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
746 cpu_to_le16w(&val
, va_arg(ap
, int));
747 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
752 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
753 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
758 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
759 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
763 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
764 int *iovcnt
= va_arg(ap
, int *);
765 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
769 V9fsString
*str
= va_arg(ap
, V9fsString
*);
770 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
771 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
775 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
776 offset
+= pdu_marshal(pdu
, offset
, "bdq",
777 qidp
->type
, qidp
->version
, qidp
->path
);
781 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
782 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
783 statp
->size
, statp
->type
, statp
->dev
,
784 &statp
->qid
, statp
->mode
, statp
->atime
,
785 statp
->mtime
, statp
->length
, &statp
->name
,
786 &statp
->uid
, &statp
->gid
, &statp
->muid
,
787 &statp
->extension
, statp
->n_uid
,
788 statp
->n_gid
, statp
->n_muid
);
792 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
793 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
794 statp
->st_result_mask
,
795 &statp
->qid
, statp
->st_mode
,
796 statp
->st_uid
, statp
->st_gid
,
797 statp
->st_nlink
, statp
->st_rdev
,
798 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
799 statp
->st_atime_sec
, statp
->st_atime_nsec
,
800 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
801 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
802 statp
->st_btime_sec
, statp
->st_btime_nsec
,
803 statp
->st_gen
, statp
->st_data_version
);
812 return offset
- old_offset
;
815 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
817 int8_t id
= pdu
->id
+ 1; /* Response */
823 if (s
->proto_version
!= V9FS_PROTO_2000L
) {
826 str
.data
= strerror(err
);
827 str
.size
= strlen(str
.data
);
829 len
+= pdu_marshal(pdu
, len
, "s", &str
);
833 len
+= pdu_marshal(pdu
, len
, "d", err
);
835 if (s
->proto_version
== V9FS_PROTO_2000L
) {
840 /* fill out the header */
841 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
843 /* keep these in sync */
847 /* push onto queue and notify */
848 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
850 /* FIXME: we should batch these completions */
851 virtio_notify(&s
->vdev
, s
->vq
);
856 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
861 if (mode
& P9_STAT_MODE_DIR
) {
865 if (mode
& P9_STAT_MODE_SYMLINK
) {
868 if (mode
& P9_STAT_MODE_SOCKET
) {
871 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
874 if (mode
& P9_STAT_MODE_DEVICE
) {
875 if (extension
&& extension
->data
[0] == 'c') {
886 if (mode
& P9_STAT_MODE_SETUID
) {
889 if (mode
& P9_STAT_MODE_SETGID
) {
892 if (mode
& P9_STAT_MODE_SETVTX
) {
899 static int donttouch_stat(V9fsStat
*stat
)
901 if (stat
->type
== -1 &&
903 stat
->qid
.type
== -1 &&
904 stat
->qid
.version
== -1 &&
905 stat
->qid
.path
== -1 &&
909 stat
->length
== -1 &&
916 stat
->n_muid
== -1) {
923 static void v9fs_stat_free(V9fsStat
*stat
)
925 v9fs_string_free(&stat
->name
);
926 v9fs_string_free(&stat
->uid
);
927 v9fs_string_free(&stat
->gid
);
928 v9fs_string_free(&stat
->muid
);
929 v9fs_string_free(&stat
->extension
);
932 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
936 mode
= stbuf
->st_mode
& 0777;
937 if (S_ISDIR(stbuf
->st_mode
)) {
938 mode
|= P9_STAT_MODE_DIR
;
941 if (S_ISLNK(stbuf
->st_mode
)) {
942 mode
|= P9_STAT_MODE_SYMLINK
;
945 if (S_ISSOCK(stbuf
->st_mode
)) {
946 mode
|= P9_STAT_MODE_SOCKET
;
949 if (S_ISFIFO(stbuf
->st_mode
)) {
950 mode
|= P9_STAT_MODE_NAMED_PIPE
;
953 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
954 mode
|= P9_STAT_MODE_DEVICE
;
957 if (stbuf
->st_mode
& S_ISUID
) {
958 mode
|= P9_STAT_MODE_SETUID
;
961 if (stbuf
->st_mode
& S_ISGID
) {
962 mode
|= P9_STAT_MODE_SETGID
;
965 if (stbuf
->st_mode
& S_ISVTX
) {
966 mode
|= P9_STAT_MODE_SETVTX
;
972 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
973 const struct stat
*stbuf
,
979 memset(v9stat
, 0, sizeof(*v9stat
));
981 stat_to_qid(stbuf
, &v9stat
->qid
);
982 v9stat
->mode
= stat_to_v9mode(stbuf
);
983 v9stat
->atime
= stbuf
->st_atime
;
984 v9stat
->mtime
= stbuf
->st_mtime
;
985 v9stat
->length
= stbuf
->st_size
;
987 v9fs_string_null(&v9stat
->uid
);
988 v9fs_string_null(&v9stat
->gid
);
989 v9fs_string_null(&v9stat
->muid
);
991 v9stat
->n_uid
= stbuf
->st_uid
;
992 v9stat
->n_gid
= stbuf
->st_gid
;
995 v9fs_string_null(&v9stat
->extension
);
997 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
998 err
= v9fs_co_readlink(s
, name
, &v9stat
->extension
);
1002 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
1003 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
1004 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
1005 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
1006 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
1007 v9fs_string_sprintf(&v9stat
->extension
, "%s %lu",
1008 "HARDLINKCOUNT", (unsigned long)stbuf
->st_nlink
);
1011 str
= strrchr(name
->data
, '/');
1018 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
1021 v9fs_string_size(&v9stat
->name
) +
1022 v9fs_string_size(&v9stat
->uid
) +
1023 v9fs_string_size(&v9stat
->gid
) +
1024 v9fs_string_size(&v9stat
->muid
) +
1025 v9fs_string_size(&v9stat
->extension
);
1029 #define P9_STATS_MODE 0x00000001ULL
1030 #define P9_STATS_NLINK 0x00000002ULL
1031 #define P9_STATS_UID 0x00000004ULL
1032 #define P9_STATS_GID 0x00000008ULL
1033 #define P9_STATS_RDEV 0x00000010ULL
1034 #define P9_STATS_ATIME 0x00000020ULL
1035 #define P9_STATS_MTIME 0x00000040ULL
1036 #define P9_STATS_CTIME 0x00000080ULL
1037 #define P9_STATS_INO 0x00000100ULL
1038 #define P9_STATS_SIZE 0x00000200ULL
1039 #define P9_STATS_BLOCKS 0x00000400ULL
1041 #define P9_STATS_BTIME 0x00000800ULL
1042 #define P9_STATS_GEN 0x00001000ULL
1043 #define P9_STATS_DATA_VERSION 0x00002000ULL
1045 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1046 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1049 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1050 V9fsStatDotl
*v9lstat
)
1052 memset(v9lstat
, 0, sizeof(*v9lstat
));
1054 v9lstat
->st_mode
= stbuf
->st_mode
;
1055 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1056 v9lstat
->st_uid
= stbuf
->st_uid
;
1057 v9lstat
->st_gid
= stbuf
->st_gid
;
1058 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1059 v9lstat
->st_size
= stbuf
->st_size
;
1060 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1061 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1062 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1063 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1064 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1065 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1066 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1067 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1068 /* Currently we only support BASIC fields in stat */
1069 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1071 stat_to_qid(stbuf
, &v9lstat
->qid
);
1074 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1076 while (len
&& *iovcnt
) {
1077 if (len
< sg
->iov_len
) {
1079 sg
->iov_base
+= len
;
1091 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1096 for (i
= 0; i
< *cnt
; i
++) {
1097 if ((total
+ sg
[i
].iov_len
) > cap
) {
1098 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1102 total
+= sg
[i
].iov_len
;
1110 static void print_sg(struct iovec
*sg
, int cnt
)
1114 printf("sg[%d]: {", cnt
);
1115 for (i
= 0; i
< cnt
; i
++) {
1119 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1124 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1127 v9fs_string_init(&str
);
1128 v9fs_string_copy(&str
, dst
);
1129 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1130 v9fs_string_free(&str
);
1133 static void v9fs_version(void *opaque
)
1135 V9fsPDU
*pdu
= opaque
;
1136 V9fsState
*s
= pdu
->s
;
1140 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1142 if (!strcmp(version
.data
, "9P2000.u")) {
1143 s
->proto_version
= V9FS_PROTO_2000U
;
1144 } else if (!strcmp(version
.data
, "9P2000.L")) {
1145 s
->proto_version
= V9FS_PROTO_2000L
;
1147 v9fs_string_sprintf(&version
, "unknown");
1150 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1151 complete_pdu(s
, pdu
, offset
);
1153 v9fs_string_free(&version
);
1157 static void v9fs_attach(void *opaque
)
1159 V9fsPDU
*pdu
= opaque
;
1160 V9fsState
*s
= pdu
->s
;
1161 int32_t fid
, afid
, n_uname
;
1162 V9fsString uname
, aname
;
1168 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1170 fidp
= alloc_fid(s
, fid
);
1176 fidp
->uid
= n_uname
;
1178 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1179 err
= fid_to_qid(s
, fidp
, &qid
);
1186 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1190 complete_pdu(s
, pdu
, err
);
1191 v9fs_string_free(&uname
);
1192 v9fs_string_free(&aname
);
1195 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1202 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1206 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1210 complete_pdu(s
, vs
->pdu
, err
);
1211 v9fs_stat_free(&vs
->v9stat
);
1215 static void v9fs_stat(void *opaque
)
1217 V9fsPDU
*pdu
= opaque
;
1218 V9fsState
*s
= pdu
->s
;
1223 vs
= qemu_malloc(sizeof(*vs
));
1227 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1229 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1231 vs
->fidp
= lookup_fid(s
, fid
);
1232 if (vs
->fidp
== NULL
) {
1237 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1238 v9fs_stat_post_lstat(s
, vs
, err
);
1242 complete_pdu(s
, vs
->pdu
, err
);
1243 v9fs_stat_free(&vs
->v9stat
);
1247 static void v9fs_getattr(void *opaque
)
1254 uint64_t request_mask
;
1255 V9fsStatDotl v9stat_dotl
;
1256 V9fsPDU
*pdu
= opaque
;
1257 V9fsState
*s
= pdu
->s
;
1259 pdu_unmarshal(pdu
, offset
, "dq", &fid
, &request_mask
);
1261 fidp
= lookup_fid(s
, fid
);
1267 * Currently we only support BASIC fields in stat, so there is no
1268 * need to look at request_mask.
1270 retval
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1274 stat_to_v9stat_dotl(s
, &stbuf
, &v9stat_dotl
);
1276 retval
+= pdu_marshal(pdu
, offset
, "A", &v9stat_dotl
);
1278 complete_pdu(s
, pdu
, retval
);
1281 /* From Linux kernel code */
1282 #define ATTR_MODE (1 << 0)
1283 #define ATTR_UID (1 << 1)
1284 #define ATTR_GID (1 << 2)
1285 #define ATTR_SIZE (1 << 3)
1286 #define ATTR_ATIME (1 << 4)
1287 #define ATTR_MTIME (1 << 5)
1288 #define ATTR_CTIME (1 << 6)
1289 #define ATTR_MASK 127
1290 #define ATTR_ATIME_SET (1 << 7)
1291 #define ATTR_MTIME_SET (1 << 8)
1293 static void v9fs_setattr(void *opaque
)
1300 V9fsPDU
*pdu
= opaque
;
1301 V9fsState
*s
= pdu
->s
;
1303 pdu_unmarshal(pdu
, offset
, "dI", &fid
, &v9iattr
);
1305 fidp
= lookup_fid(s
, fid
);
1310 if (v9iattr
.valid
& ATTR_MODE
) {
1311 err
= v9fs_co_chmod(s
, &fidp
->path
, v9iattr
.mode
);
1316 if (v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1317 struct timespec times
[2];
1318 if (v9iattr
.valid
& ATTR_ATIME
) {
1319 if (v9iattr
.valid
& ATTR_ATIME_SET
) {
1320 times
[0].tv_sec
= v9iattr
.atime_sec
;
1321 times
[0].tv_nsec
= v9iattr
.atime_nsec
;
1323 times
[0].tv_nsec
= UTIME_NOW
;
1326 times
[0].tv_nsec
= UTIME_OMIT
;
1328 if (v9iattr
.valid
& ATTR_MTIME
) {
1329 if (v9iattr
.valid
& ATTR_MTIME_SET
) {
1330 times
[1].tv_sec
= v9iattr
.mtime_sec
;
1331 times
[1].tv_nsec
= v9iattr
.mtime_nsec
;
1333 times
[1].tv_nsec
= UTIME_NOW
;
1336 times
[1].tv_nsec
= UTIME_OMIT
;
1338 err
= v9fs_co_utimensat(s
, &fidp
->path
, times
);
1344 * If the only valid entry in iattr is ctime we can call
1345 * chown(-1,-1) to update the ctime of the file
1347 if ((v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1348 ((v9iattr
.valid
& ATTR_CTIME
)
1349 && !((v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1350 if (!(v9iattr
.valid
& ATTR_UID
)) {
1353 if (!(v9iattr
.valid
& ATTR_GID
)) {
1356 err
= v9fs_co_chown(s
, &fidp
->path
, v9iattr
.uid
,
1362 if (v9iattr
.valid
& (ATTR_SIZE
)) {
1363 err
= v9fs_co_truncate(s
, &fidp
->path
, v9iattr
.size
);
1370 complete_pdu(s
, pdu
, err
);
1373 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1375 complete_pdu(s
, vs
->pdu
, err
);
1377 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1378 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1379 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1382 qemu_free(vs
->wnames
);
1383 qemu_free(vs
->qids
);
1387 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1391 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1393 for (i
= 0; i
< vs
->nwnames
; i
++) {
1394 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1398 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1402 free_fid(s
, vs
->newfidp
->fid
);
1403 v9fs_string_free(&vs
->path
);
1408 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1411 if (vs
->name_idx
< vs
->nwnames
) {
1412 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1413 vs
->wnames
[vs
->name_idx
].data
);
1414 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1416 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1417 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1421 v9fs_string_free(&vs
->path
);
1422 v9fs_walk_marshal(vs
);
1425 v9fs_walk_complete(s
, vs
, err
);
1428 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1432 v9fs_string_free(&vs
->path
);
1437 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1439 if (vs
->name_idx
< vs
->nwnames
) {
1441 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1442 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1443 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1445 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1446 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1450 v9fs_string_free(&vs
->path
);
1451 v9fs_walk_marshal(vs
);
1454 v9fs_walk_complete(s
, vs
, err
);
1457 static void v9fs_walk(void *opaque
)
1459 V9fsPDU
*pdu
= opaque
;
1460 V9fsState
*s
= pdu
->s
;
1461 int32_t fid
, newfid
;
1466 vs
= qemu_malloc(sizeof(*vs
));
1472 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1473 &newfid
, &vs
->nwnames
);
1475 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1476 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1478 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1480 for (i
= 0; i
< vs
->nwnames
; i
++) {
1481 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1484 } else if (vs
->nwnames
> P9_MAXWELEM
) {
1489 vs
->fidp
= lookup_fid(s
, fid
);
1490 if (vs
->fidp
== NULL
) {
1495 /* FIXME: is this really valid? */
1496 if (fid
== newfid
) {
1498 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1499 v9fs_string_init(&vs
->path
);
1502 if (vs
->name_idx
< vs
->nwnames
) {
1503 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1504 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1505 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1507 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1508 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1512 vs
->newfidp
= alloc_fid(s
, newfid
);
1513 if (vs
->newfidp
== NULL
) {
1518 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1519 v9fs_string_init(&vs
->path
);
1521 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1523 if (vs
->name_idx
< vs
->nwnames
) {
1524 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1525 vs
->wnames
[vs
->name_idx
].data
);
1526 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1528 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1529 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1534 v9fs_walk_marshal(vs
);
1537 v9fs_walk_complete(s
, vs
, err
);
1540 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1542 struct statfs stbuf
;
1546 * iounit should be multiples of f_bsize (host filesystem block size
1547 * and as well as less than (client msize - P9_IOHDRSZ))
1549 if (!v9fs_do_statfs(s
, name
, &stbuf
)) {
1550 iounit
= stbuf
.f_bsize
;
1551 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1555 iounit
= s
->msize
- P9_IOHDRSZ
;
1560 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1562 if (vs
->fidp
->fs
.dir
== NULL
) {
1566 vs
->fidp
->fid_type
= P9_FID_DIR
;
1567 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1570 complete_pdu(s
, vs
->pdu
, err
);
1575 static void v9fs_open_post_getiounit(V9fsState
*s
, V9fsOpenState
*vs
)
1578 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
1580 complete_pdu(s
, vs
->pdu
, err
);
1584 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1586 if (vs
->fidp
->fs
.fd
== -1) {
1590 vs
->fidp
->fid_type
= P9_FID_FILE
;
1591 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
1592 v9fs_open_post_getiounit(s
, vs
);
1595 complete_pdu(s
, vs
->pdu
, err
);
1599 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1608 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1610 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1611 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1612 v9fs_open_post_opendir(s
, vs
, err
);
1614 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1616 flags
&= ~(O_NOCTTY
| O_ASYNC
| O_CREAT
);
1617 /* Ignore direct disk access hint until the server supports it. */
1620 flags
= omode_to_uflags(vs
->mode
);
1622 vs
->fidp
->fs
.fd
= v9fs_do_open(s
, &vs
->fidp
->path
, flags
);
1623 v9fs_open_post_open(s
, vs
, err
);
1627 complete_pdu(s
, vs
->pdu
, err
);
1631 static void v9fs_open(void *opaque
)
1633 V9fsPDU
*pdu
= opaque
;
1634 V9fsState
*s
= pdu
->s
;
1639 vs
= qemu_malloc(sizeof(*vs
));
1644 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1645 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dd", &fid
, &vs
->mode
);
1647 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1650 vs
->fidp
= lookup_fid(s
, fid
);
1651 if (vs
->fidp
== NULL
) {
1656 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1658 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1660 v9fs_open_post_lstat(s
, vs
, err
);
1663 complete_pdu(s
, pdu
, err
);
1667 static void v9fs_post_lcreate(V9fsState
*s
, V9fsLcreateState
*vs
, int err
)
1670 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
1671 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1672 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
,
1676 vs
->fidp
->fid_type
= P9_FID_NONE
;
1678 if (vs
->fidp
->fs
.fd
> 0) {
1679 close(vs
->fidp
->fs
.fd
);
1683 complete_pdu(s
, vs
->pdu
, err
);
1684 v9fs_string_free(&vs
->name
);
1685 v9fs_string_free(&vs
->fullname
);
1689 static void v9fs_lcreate_post_get_iounit(V9fsState
*s
, V9fsLcreateState
*vs
,
1696 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1699 v9fs_post_lcreate(s
, vs
, err
);
1702 static void v9fs_lcreate_post_do_open2(V9fsState
*s
, V9fsLcreateState
*vs
,
1705 if (vs
->fidp
->fs
.fd
== -1) {
1709 vs
->fidp
->fid_type
= P9_FID_FILE
;
1710 vs
->iounit
= get_iounit(s
, &vs
->fullname
);
1711 v9fs_lcreate_post_get_iounit(s
, vs
, err
);
1715 v9fs_post_lcreate(s
, vs
, err
);
1718 static void v9fs_lcreate(void *opaque
)
1720 V9fsPDU
*pdu
= opaque
;
1721 V9fsState
*s
= pdu
->s
;
1722 int32_t dfid
, flags
, mode
;
1724 V9fsLcreateState
*vs
;
1727 vs
= qemu_malloc(sizeof(*vs
));
1731 v9fs_string_init(&vs
->fullname
);
1733 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsddd", &dfid
, &vs
->name
, &flags
,
1736 vs
->fidp
= lookup_fid(s
, dfid
);
1737 if (vs
->fidp
== NULL
) {
1742 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
1745 /* Ignore direct disk access hint until the server supports it. */
1748 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
1750 v9fs_lcreate_post_do_open2(s
, vs
, err
);
1754 complete_pdu(s
, vs
->pdu
, err
);
1755 v9fs_string_free(&vs
->name
);
1759 static void v9fs_post_do_fsync(V9fsState
*s
, V9fsPDU
*pdu
, int err
)
1764 complete_pdu(s
, pdu
, err
);
1767 static void v9fs_fsync(void *opaque
)
1769 V9fsPDU
*pdu
= opaque
;
1770 V9fsState
*s
= pdu
->s
;
1777 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &datasync
);
1778 fidp
= lookup_fid(s
, fid
);
1781 v9fs_post_do_fsync(s
, pdu
, err
);
1784 err
= v9fs_do_fsync(s
, fidp
->fs
.fd
, datasync
);
1785 v9fs_post_do_fsync(s
, pdu
, err
);
1788 static void v9fs_clunk(void *opaque
)
1790 V9fsPDU
*pdu
= opaque
;
1791 V9fsState
*s
= pdu
->s
;
1796 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1798 err
= free_fid(s
, fid
);
1806 complete_pdu(s
, pdu
, err
);
1809 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1811 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1816 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1817 vs
->offset
+= vs
->count
;
1820 complete_pdu(s
, vs
->pdu
, err
);
1821 v9fs_stat_free(&vs
->v9stat
);
1822 v9fs_string_free(&vs
->name
);
1827 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1834 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1839 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1841 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1842 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1843 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1844 v9fs_read_post_seekdir(s
, vs
, err
);
1847 vs
->count
+= vs
->len
;
1848 v9fs_stat_free(&vs
->v9stat
);
1849 v9fs_string_free(&vs
->name
);
1850 vs
->dir_pos
= vs
->dent
->d_off
;
1851 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1852 v9fs_read_post_readdir(s
, vs
, err
);
1855 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1856 v9fs_read_post_seekdir(s
, vs
, err
);
1861 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1864 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1865 v9fs_string_init(&vs
->name
);
1866 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1868 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1869 v9fs_read_post_dir_lstat(s
, vs
, err
);
1873 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1874 vs
->offset
+= vs
->count
;
1876 complete_pdu(s
, vs
->pdu
, err
);
1881 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1883 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1884 v9fs_read_post_readdir(s
, vs
, err
);
1888 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1891 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
1892 v9fs_read_post_telldir(s
, vs
, err
);
1896 static void v9fs_read_post_preadv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1899 /* IO error return the error */
1903 vs
->total
+= vs
->len
;
1904 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1905 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1908 print_sg(vs
->sg
, vs
->cnt
);
1910 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1915 } while (vs
->len
== -1 && errno
== EINTR
);
1916 if (vs
->len
== -1) {
1919 v9fs_read_post_preadv(s
, vs
, err
);
1922 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1923 vs
->offset
+= vs
->count
;
1927 complete_pdu(s
, vs
->pdu
, err
);
1931 static void v9fs_xattr_read(V9fsState
*s
, V9fsReadState
*vs
)
1937 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
1938 read_count
= xattr_len
- vs
->off
;
1939 if (read_count
> vs
->count
) {
1940 read_count
= vs
->count
;
1941 } else if (read_count
< 0) {
1943 * read beyond XATTR value
1947 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", read_count
);
1948 vs
->offset
+= pdu_pack(vs
->pdu
, vs
->offset
,
1949 ((char *)vs
->fidp
->fs
.xattr
.value
) + vs
->off
,
1952 complete_pdu(s
, vs
->pdu
, err
);
1956 static void v9fs_read(void *opaque
)
1958 V9fsPDU
*pdu
= opaque
;
1959 V9fsState
*s
= pdu
->s
;
1964 vs
= qemu_malloc(sizeof(*vs
));
1971 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1973 vs
->fidp
= lookup_fid(s
, fid
);
1974 if (vs
->fidp
== NULL
) {
1979 if (vs
->fidp
->fid_type
== P9_FID_DIR
) {
1980 vs
->max_count
= vs
->count
;
1983 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
1985 v9fs_read_post_rewinddir(s
, vs
, err
);
1987 } else if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
1989 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
1990 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1991 if (vs
->total
<= vs
->count
) {
1992 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1998 v9fs_read_post_preadv(s
, vs
, err
);
2001 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2002 v9fs_xattr_read(s
, vs
);
2008 complete_pdu(s
, pdu
, err
);
2012 static size_t v9fs_readdir_data_size(V9fsString
*name
)
2015 * Size of each dirent on the wire: size of qid (13) + size of offset (8)
2016 * size of type (1) + size of name.size (2) + strlen(name.data)
2018 return 24 + v9fs_string_size(name
);
2021 static int v9fs_do_readdir(V9fsState
*s
, V9fsPDU
*pdu
,
2022 V9fsFidState
*fidp
, int32_t max_count
)
2029 off_t saved_dir_pos
;
2030 struct dirent
*dent
;
2032 /* save the directory position */
2033 saved_dir_pos
= v9fs_co_telldir(s
, fidp
);
2034 if (saved_dir_pos
< 0) {
2035 return saved_dir_pos
;
2038 err
= v9fs_co_readdir(s
, fidp
, &dent
);
2042 v9fs_string_init(&name
);
2043 v9fs_string_sprintf(&name
, "%s", dent
->d_name
);
2044 if ((count
+ v9fs_readdir_data_size(&name
)) > max_count
) {
2045 /* Ran out of buffer. Set dir back to old position and return */
2046 v9fs_co_seekdir(s
, fidp
, saved_dir_pos
);
2047 v9fs_string_free(&name
);
2051 * Fill up just the path field of qid because the client uses
2052 * only that. To fill the entire qid structure we will have
2053 * to stat each dirent found, which is expensive
2055 size
= MIN(sizeof(dent
->d_ino
), sizeof(qid
.path
));
2056 memcpy(&qid
.path
, &dent
->d_ino
, size
);
2057 /* Fill the other fields with dummy values */
2061 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
2062 len
= pdu_marshal(pdu
, 11 + count
, "Qqbs",
2064 dent
->d_type
, &name
);
2066 v9fs_string_free(&name
);
2067 saved_dir_pos
= dent
->d_off
;
2075 static void v9fs_readdir(void *opaque
)
2081 int64_t initial_offset
;
2082 int32_t count
, max_count
;
2083 V9fsPDU
*pdu
= opaque
;
2084 V9fsState
*s
= pdu
->s
;
2086 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &initial_offset
, &max_count
);
2088 fidp
= lookup_fid(s
, fid
);
2089 if (fidp
== NULL
|| !fidp
->fs
.dir
) {
2093 if (initial_offset
== 0) {
2094 v9fs_co_rewinddir(s
, fidp
);
2096 v9fs_co_seekdir(s
, fidp
, initial_offset
);
2098 count
= v9fs_do_readdir(s
, pdu
, fidp
, max_count
);
2104 retval
+= pdu_marshal(pdu
, offset
, "d", count
);
2107 complete_pdu(s
, pdu
, retval
);
2110 static void v9fs_write_post_pwritev(V9fsState
*s
, V9fsWriteState
*vs
,
2114 /* IO error return the error */
2118 vs
->total
+= vs
->len
;
2119 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2120 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2123 print_sg(vs
->sg
, vs
->cnt
);
2125 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2130 } while (vs
->len
== -1 && errno
== EINTR
);
2131 if (vs
->len
== -1) {
2134 v9fs_write_post_pwritev(s
, vs
, err
);
2137 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2140 complete_pdu(s
, vs
->pdu
, err
);
2144 static void v9fs_xattr_write(V9fsState
*s
, V9fsWriteState
*vs
)
2151 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2152 write_count
= xattr_len
- vs
->off
;
2153 if (write_count
> vs
->count
) {
2154 write_count
= vs
->count
;
2155 } else if (write_count
< 0) {
2157 * write beyond XATTR value len specified in
2163 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", write_count
);
2165 vs
->fidp
->fs
.xattr
.copied_len
+= write_count
;
2167 * Now copy the content from sg list
2169 for (i
= 0; i
< vs
->cnt
; i
++) {
2170 if (write_count
> vs
->sg
[i
].iov_len
) {
2171 to_copy
= vs
->sg
[i
].iov_len
;
2173 to_copy
= write_count
;
2175 memcpy((char *)vs
->fidp
->fs
.xattr
.value
+ vs
->off
,
2176 vs
->sg
[i
].iov_base
, to_copy
);
2177 /* updating vs->off since we are not using below */
2179 write_count
-= to_copy
;
2182 complete_pdu(s
, vs
->pdu
, err
);
2186 static void v9fs_write(void *opaque
)
2188 V9fsPDU
*pdu
= opaque
;
2189 V9fsState
*s
= pdu
->s
;
2194 vs
= qemu_malloc(sizeof(*vs
));
2202 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2205 vs
->fidp
= lookup_fid(s
, fid
);
2206 if (vs
->fidp
== NULL
) {
2211 if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2212 if (vs
->fidp
->fs
.fd
== -1) {
2216 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2218 * setxattr operation
2220 v9fs_xattr_write(s
, vs
);
2226 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2227 if (vs
->total
<= vs
->count
) {
2228 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
, vs
->off
);
2233 v9fs_write_post_pwritev(s
, vs
, err
);
2237 complete_pdu(s
, vs
->pdu
, err
);
2241 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2244 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2245 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2247 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2250 complete_pdu(s
, vs
->pdu
, err
);
2251 v9fs_string_free(&vs
->name
);
2252 v9fs_string_free(&vs
->extension
);
2253 v9fs_string_free(&vs
->fullname
);
2257 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2260 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2261 v9fs_create_post_getiounit(s
, vs
);
2265 complete_pdu(s
, vs
->pdu
, err
);
2266 v9fs_string_free(&vs
->name
);
2267 v9fs_string_free(&vs
->extension
);
2268 v9fs_string_free(&vs
->fullname
);
2272 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2277 v9fs_post_create(s
, vs
, err
);
2280 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2283 if (!vs
->fidp
->fs
.dir
) {
2286 vs
->fidp
->fid_type
= P9_FID_DIR
;
2287 v9fs_post_create(s
, vs
, err
);
2290 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2298 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2299 v9fs_create_post_opendir(s
, vs
, err
);
2303 v9fs_post_create(s
, vs
, err
);
2306 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2312 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2313 v9fs_create_post_dir_lstat(s
, vs
, err
);
2317 v9fs_post_create(s
, vs
, err
);
2320 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2323 vs
->fidp
->fid_type
= P9_FID_NONE
;
2324 close(vs
->fidp
->fs
.fd
);
2327 v9fs_post_create(s
, vs
, err
);
2331 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2333 if (vs
->fidp
->fs
.fd
== -1) {
2337 vs
->fidp
->fid_type
= P9_FID_FILE
;
2338 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
2339 v9fs_create_post_fstat(s
, vs
, err
);
2344 v9fs_post_create(s
, vs
, err
);
2348 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2351 if (err
== 0 || errno
!= ENOENT
) {
2356 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2357 err
= v9fs_co_mkdir(s
, vs
->fullname
.data
, vs
->perm
& 0777,
2359 v9fs_create_post_mkdir(s
, vs
, err
);
2360 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2361 err
= v9fs_do_symlink(s
, vs
->fidp
, vs
->extension
.data
,
2362 vs
->fullname
.data
, -1);
2363 v9fs_create_post_perms(s
, vs
, err
);
2364 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2365 int32_t nfid
= atoi(vs
->extension
.data
);
2366 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2367 if (nfidp
== NULL
) {
2369 v9fs_post_create(s
, vs
, err
);
2371 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2372 v9fs_create_post_perms(s
, vs
, err
);
2373 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2375 uint32_t major
, minor
;
2378 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2381 v9fs_post_create(s
, vs
, err
);
2393 v9fs_post_create(s
, vs
, err
);
2396 nmode
|= vs
->perm
& 0777;
2397 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, nmode
,
2398 makedev(major
, minor
), vs
->fidp
->uid
, -1);
2399 v9fs_create_post_perms(s
, vs
, err
);
2400 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2401 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFIFO
| (vs
->perm
& 0777),
2402 0, vs
->fidp
->uid
, -1);
2403 v9fs_post_create(s
, vs
, err
);
2404 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2405 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFSOCK
| (vs
->perm
& 0777),
2406 0, vs
->fidp
->uid
, -1);
2407 v9fs_post_create(s
, vs
, err
);
2409 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
2410 -1, omode_to_uflags(vs
->mode
)|O_CREAT
, vs
->perm
);
2412 v9fs_create_post_open2(s
, vs
, err
);
2418 v9fs_post_create(s
, vs
, err
);
2421 static void v9fs_create(void *opaque
)
2423 V9fsPDU
*pdu
= opaque
;
2424 V9fsState
*s
= pdu
->s
;
2426 V9fsCreateState
*vs
;
2429 vs
= qemu_malloc(sizeof(*vs
));
2433 v9fs_string_init(&vs
->fullname
);
2435 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2436 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2438 vs
->fidp
= lookup_fid(s
, fid
);
2439 if (vs
->fidp
== NULL
) {
2444 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2447 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2448 v9fs_create_post_lstat(s
, vs
, err
);
2452 complete_pdu(s
, vs
->pdu
, err
);
2453 v9fs_string_free(&vs
->name
);
2454 v9fs_string_free(&vs
->extension
);
2458 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2461 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2462 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2467 complete_pdu(s
, vs
->pdu
, err
);
2468 v9fs_string_free(&vs
->name
);
2469 v9fs_string_free(&vs
->symname
);
2470 v9fs_string_free(&vs
->fullname
);
2474 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2480 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2482 v9fs_post_symlink(s
, vs
, err
);
2485 static void v9fs_symlink(void *opaque
)
2487 V9fsPDU
*pdu
= opaque
;
2488 V9fsState
*s
= pdu
->s
;
2490 V9fsSymlinkState
*vs
;
2494 vs
= qemu_malloc(sizeof(*vs
));
2498 v9fs_string_init(&vs
->fullname
);
2500 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2501 &vs
->symname
, &gid
);
2503 vs
->dfidp
= lookup_fid(s
, dfid
);
2504 if (vs
->dfidp
== NULL
) {
2509 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2511 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2512 vs
->fullname
.data
, gid
);
2513 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2517 complete_pdu(s
, vs
->pdu
, err
);
2518 v9fs_string_free(&vs
->name
);
2519 v9fs_string_free(&vs
->symname
);
2523 static void v9fs_flush(void *opaque
)
2525 V9fsPDU
*pdu
= opaque
;
2526 V9fsState
*s
= pdu
->s
;
2527 /* A nop call with no return */
2528 complete_pdu(s
, pdu
, 7);
2532 static void v9fs_link(void *opaque
)
2534 V9fsPDU
*pdu
= opaque
;
2535 V9fsState
*s
= pdu
->s
;
2536 int32_t dfid
, oldfid
;
2537 V9fsFidState
*dfidp
, *oldfidp
;
2538 V9fsString name
, fullname
;
2542 v9fs_string_init(&fullname
);
2544 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2546 dfidp
= lookup_fid(s
, dfid
);
2547 if (dfidp
== NULL
) {
2552 oldfidp
= lookup_fid(s
, oldfid
);
2553 if (oldfidp
== NULL
) {
2558 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2560 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2564 v9fs_string_free(&fullname
);
2567 v9fs_string_free(&name
);
2568 complete_pdu(s
, pdu
, err
);
2571 static void v9fs_remove(void *opaque
)
2577 V9fsPDU
*pdu
= opaque
;
2579 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2581 fidp
= lookup_fid(pdu
->s
, fid
);
2586 err
= v9fs_co_remove(pdu
->s
, &fidp
->path
);
2591 /* For TREMOVE we need to clunk the fid even on failed remove */
2592 free_fid(pdu
->s
, fidp
->fid
);
2594 complete_pdu(pdu
->s
, pdu
, err
);
2597 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2606 v9fs_stat_free(&vs
->v9stat
);
2607 complete_pdu(s
, vs
->pdu
, err
);
2611 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2616 if (vs
->v9stat
.length
!= -1) {
2617 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2621 v9fs_wstat_post_truncate(s
, vs
, err
);
2625 v9fs_stat_free(&vs
->v9stat
);
2626 complete_pdu(s
, vs
->pdu
, err
);
2630 static int v9fs_complete_rename(V9fsState
*s
, V9fsFidState
*fidp
,
2631 int32_t newdirfid
, V9fsString
*name
)
2635 char *old_name
, *new_name
;
2637 if (newdirfid
!= -1) {
2638 V9fsFidState
*dirfidp
;
2639 dirfidp
= lookup_fid(s
, newdirfid
);
2640 if (dirfidp
== NULL
) {
2644 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2646 new_name
= qemu_mallocz(dirfidp
->path
.size
+ name
->size
+ 2);
2648 strcpy(new_name
, dirfidp
->path
.data
);
2649 strcat(new_name
, "/");
2650 strcat(new_name
+ dirfidp
->path
.size
, name
->data
);
2652 old_name
= fidp
->path
.data
;
2653 end
= strrchr(old_name
, '/');
2659 new_name
= qemu_mallocz(end
- old_name
+ name
->size
+ 1);
2661 strncat(new_name
, old_name
, end
- old_name
);
2662 strncat(new_name
+ (end
- old_name
), name
->data
, name
->size
);
2665 v9fs_string_free(name
);
2666 name
->data
= new_name
;
2667 name
->size
= strlen(new_name
);
2669 if (strcmp(new_name
, fidp
->path
.data
) != 0) {
2670 err
= v9fs_co_rename(s
, &fidp
->path
, name
);
2674 V9fsFidState
*tfidp
;
2676 * Fixup fid's pointing to the old name to
2677 * start pointing to the new name
2679 for (tfidp
= s
->fid_list
; tfidp
; tfidp
= tfidp
->next
) {
2680 if (fidp
== tfidp
) {
2682 * we replace name of this fid towards the end
2683 * so that our below strcmp will work
2687 if (v9fs_path_is_ancestor(&fidp
->path
, &tfidp
->path
)) {
2688 /* replace the name */
2689 v9fs_fix_path(&tfidp
->path
, name
, strlen(fidp
->path
.data
));
2692 v9fs_string_copy(&fidp
->path
, name
);
2698 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2704 if (vs
->v9stat
.name
.size
!= 0) {
2705 err
= v9fs_complete_rename(s
, vs
->fidp
, -1, &vs
->v9stat
.name
);
2707 v9fs_wstat_post_rename(s
, vs
, err
);
2711 v9fs_stat_free(&vs
->v9stat
);
2712 complete_pdu(s
, vs
->pdu
, err
);
2716 static void v9fs_rename(void *opaque
)
2724 V9fsPDU
*pdu
= opaque
;
2725 V9fsState
*s
= pdu
->s
;
2727 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newdirfid
, &name
);
2729 fidp
= lookup_fid(s
, fid
);
2734 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
2736 err
= v9fs_complete_rename(s
, fidp
, newdirfid
, &name
);
2741 complete_pdu(s
, pdu
, err
);
2742 v9fs_string_free(&name
);
2745 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2751 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2752 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2753 vs
->v9stat
.n_gid
)) {
2757 v9fs_wstat_post_chown(s
, vs
, err
);
2761 v9fs_stat_free(&vs
->v9stat
);
2762 complete_pdu(s
, vs
->pdu
, err
);
2766 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2772 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2773 struct timespec times
[2];
2774 if (vs
->v9stat
.atime
!= -1) {
2775 times
[0].tv_sec
= vs
->v9stat
.atime
;
2776 times
[0].tv_nsec
= 0;
2778 times
[0].tv_nsec
= UTIME_OMIT
;
2780 if (vs
->v9stat
.mtime
!= -1) {
2781 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2782 times
[1].tv_nsec
= 0;
2784 times
[1].tv_nsec
= UTIME_OMIT
;
2787 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2792 v9fs_wstat_post_utime(s
, vs
, err
);
2796 v9fs_stat_free(&vs
->v9stat
);
2797 complete_pdu(s
, vs
->pdu
, err
);
2801 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2806 v9fs_stat_free(&vs
->v9stat
);
2807 complete_pdu(s
, vs
->pdu
, err
);
2811 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2820 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2822 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2823 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2824 /* Attempting to change the type */
2829 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2830 &vs
->v9stat
.extension
))) {
2833 v9fs_wstat_post_chmod(s
, vs
, err
);
2837 v9fs_stat_free(&vs
->v9stat
);
2838 complete_pdu(s
, vs
->pdu
, err
);
2842 static void v9fs_wstat(void *opaque
)
2844 V9fsPDU
*pdu
= opaque
;
2845 V9fsState
*s
= pdu
->s
;
2850 vs
= qemu_malloc(sizeof(*vs
));
2854 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2856 vs
->fidp
= lookup_fid(s
, fid
);
2857 if (vs
->fidp
== NULL
) {
2862 /* do we need to sync the file? */
2863 if (donttouch_stat(&vs
->v9stat
)) {
2864 err
= v9fs_do_fsync(s
, vs
->fidp
->fs
.fd
, 0);
2865 v9fs_wstat_post_fsync(s
, vs
, err
);
2869 if (vs
->v9stat
.mode
!= -1) {
2870 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2871 v9fs_wstat_post_lstat(s
, vs
, err
);
2875 v9fs_wstat_post_chmod(s
, vs
, err
);
2879 v9fs_stat_free(&vs
->v9stat
);
2880 complete_pdu(s
, vs
->pdu
, err
);
2884 static int v9fs_fill_statfs(V9fsState
*s
, V9fsPDU
*pdu
, struct statfs
*stbuf
)
2896 int32_t bsize_factor
;
2899 * compute bsize factor based on host file system block size
2902 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/stbuf
->f_bsize
;
2903 if (!bsize_factor
) {
2906 f_type
= stbuf
->f_type
;
2907 f_bsize
= stbuf
->f_bsize
;
2908 f_bsize
*= bsize_factor
;
2910 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2911 * adjust(divide) the number of blocks, free blocks and available
2912 * blocks by bsize factor
2914 f_blocks
= stbuf
->f_blocks
/bsize_factor
;
2915 f_bfree
= stbuf
->f_bfree
/bsize_factor
;
2916 f_bavail
= stbuf
->f_bavail
/bsize_factor
;
2917 f_files
= stbuf
->f_files
;
2918 f_ffree
= stbuf
->f_ffree
;
2919 fsid_val
= (unsigned int) stbuf
->f_fsid
.__val
[0] |
2920 (unsigned long long)stbuf
->f_fsid
.__val
[1] << 32;
2921 f_namelen
= stbuf
->f_namelen
;
2923 return pdu_marshal(pdu
, offset
, "ddqqqqqqd",
2924 f_type
, f_bsize
, f_blocks
, f_bfree
,
2925 f_bavail
, f_files
, f_ffree
,
2926 fsid_val
, f_namelen
);
2929 static void v9fs_statfs(void *opaque
)
2935 struct statfs stbuf
;
2936 V9fsPDU
*pdu
= opaque
;
2937 V9fsState
*s
= pdu
->s
;
2939 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2940 fidp
= lookup_fid(s
, fid
);
2945 retval
= v9fs_co_statfs(s
, &fidp
->path
, &stbuf
);
2950 retval
+= v9fs_fill_statfs(s
, pdu
, &stbuf
);
2952 complete_pdu(s
, pdu
, retval
);
2956 static void v9fs_mknod(void *opaque
)
2968 V9fsString fullname
;
2970 V9fsPDU
*pdu
= opaque
;
2971 V9fsState
*s
= pdu
->s
;
2973 v9fs_string_init(&fullname
);
2974 pdu_unmarshal(pdu
, offset
, "dsdddd", &fid
, &name
, &mode
,
2975 &major
, &minor
, &gid
);
2977 fidp
= lookup_fid(s
, fid
);
2982 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
2983 err
= v9fs_co_mknod(s
, &fullname
, fidp
->uid
, gid
,
2984 makedev(major
, minor
), mode
);
2988 err
= v9fs_co_lstat(s
, &fullname
, &stbuf
);
2992 stat_to_qid(&stbuf
, &qid
);
2994 err
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2996 complete_pdu(s
, pdu
, err
);
2997 v9fs_string_free(&fullname
);
2998 v9fs_string_free(&name
);
3002 * Implement posix byte range locking code
3003 * Server side handling of locking code is very simple, because 9p server in
3004 * QEMU can handle only one client. And most of the lock handling
3005 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
3006 * do any thing in * qemu 9p server side lock code path.
3007 * So when a TLOCK request comes, always return success
3010 static void v9fs_lock(void *opaque
)
3012 V9fsPDU
*pdu
= opaque
;
3013 V9fsState
*s
= pdu
->s
;
3014 int32_t fid
, err
= 0;
3017 vs
= qemu_mallocz(sizeof(*vs
));
3021 vs
->flock
= qemu_malloc(sizeof(*vs
->flock
));
3022 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dbdqqds", &fid
, &vs
->flock
->type
,
3023 &vs
->flock
->flags
, &vs
->flock
->start
, &vs
->flock
->length
,
3024 &vs
->flock
->proc_id
, &vs
->flock
->client_id
);
3026 vs
->status
= P9_LOCK_ERROR
;
3028 /* We support only block flag now (that too ignored currently) */
3029 if (vs
->flock
->flags
& ~P9_LOCK_FLAGS_BLOCK
) {
3033 vs
->fidp
= lookup_fid(s
, fid
);
3034 if (vs
->fidp
== NULL
) {
3039 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
3044 vs
->status
= P9_LOCK_SUCCESS
;
3046 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "b", vs
->status
);
3047 complete_pdu(s
, vs
->pdu
, err
);
3048 qemu_free(vs
->flock
);
3053 * When a TGETLOCK request comes, always return success because all lock
3054 * handling is done by client's VFS layer.
3057 static void v9fs_getlock(void *opaque
)
3059 V9fsPDU
*pdu
= opaque
;
3060 V9fsState
*s
= pdu
->s
;
3061 int32_t fid
, err
= 0;
3062 V9fsGetlockState
*vs
;
3064 vs
= qemu_mallocz(sizeof(*vs
));
3068 vs
->glock
= qemu_malloc(sizeof(*vs
->glock
));
3069 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dbqqds", &fid
, &vs
->glock
->type
,
3070 &vs
->glock
->start
, &vs
->glock
->length
, &vs
->glock
->proc_id
,
3071 &vs
->glock
->client_id
);
3073 vs
->fidp
= lookup_fid(s
, fid
);
3074 if (vs
->fidp
== NULL
) {
3079 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
3084 vs
->glock
->type
= F_UNLCK
;
3085 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "bqqds", vs
->glock
->type
,
3086 vs
->glock
->start
, vs
->glock
->length
, vs
->glock
->proc_id
,
3087 &vs
->glock
->client_id
);
3089 complete_pdu(s
, vs
->pdu
, err
);
3090 qemu_free(vs
->glock
);
3094 static void v9fs_mkdir(void *opaque
)
3096 V9fsPDU
*pdu
= opaque
;
3100 V9fsString name
, fullname
;
3107 v9fs_string_init(&fullname
);
3108 pdu_unmarshal(pdu
, offset
, "dsdd", &fid
, &name
, &mode
, &gid
);
3110 fidp
= lookup_fid(pdu
->s
, fid
);
3115 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
3116 err
= v9fs_co_mkdir(pdu
->s
, fullname
.data
, mode
, fidp
->uid
, gid
);
3120 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
3124 stat_to_qid(&stbuf
, &qid
);
3125 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
3128 complete_pdu(pdu
->s
, pdu
, err
);
3129 v9fs_string_free(&fullname
);
3130 v9fs_string_free(&name
);
3133 static void v9fs_xattrwalk(void *opaque
)
3139 int32_t fid
, newfid
;
3140 V9fsFidState
*file_fidp
;
3141 V9fsFidState
*xattr_fidp
;
3142 V9fsPDU
*pdu
= opaque
;
3143 V9fsState
*s
= pdu
->s
;
3145 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newfid
, &name
);
3146 file_fidp
= lookup_fid(s
, fid
);
3147 if (file_fidp
== NULL
) {
3151 xattr_fidp
= alloc_fid(s
, newfid
);
3152 if (xattr_fidp
== NULL
) {
3156 v9fs_string_copy(&xattr_fidp
->path
, &file_fidp
->path
);
3157 if (name
.data
[0] == 0) {
3159 * listxattr request. Get the size first
3161 size
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
, NULL
, 0);
3164 free_fid(s
, xattr_fidp
->fid
);
3168 * Read the xattr value
3170 xattr_fidp
->fs
.xattr
.len
= size
;
3171 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3172 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3174 xattr_fidp
->fs
.xattr
.value
= qemu_malloc(size
);
3175 err
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
,
3176 xattr_fidp
->fs
.xattr
.value
,
3177 xattr_fidp
->fs
.xattr
.len
);
3179 free_fid(s
, xattr_fidp
->fid
);
3183 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3187 * specific xattr fid. We check for xattr
3188 * presence also collect the xattr size
3190 size
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
3194 free_fid(s
, xattr_fidp
->fid
);
3198 * Read the xattr value
3200 xattr_fidp
->fs
.xattr
.len
= size
;
3201 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3202 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3204 xattr_fidp
->fs
.xattr
.value
= qemu_malloc(size
);
3205 err
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
3206 &name
, xattr_fidp
->fs
.xattr
.value
,
3207 xattr_fidp
->fs
.xattr
.len
);
3209 free_fid(s
, xattr_fidp
->fid
);
3213 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3217 complete_pdu(s
, pdu
, err
);
3218 v9fs_string_free(&name
);
3221 static void v9fs_xattrcreate(void *opaque
)
3229 V9fsFidState
*file_fidp
;
3230 V9fsFidState
*xattr_fidp
;
3231 V9fsPDU
*pdu
= opaque
;
3232 V9fsState
*s
= pdu
->s
;
3234 pdu_unmarshal(pdu
, offset
, "dsqd",
3235 &fid
, &name
, &size
, &flags
);
3237 file_fidp
= lookup_fid(s
, fid
);
3238 if (file_fidp
== NULL
) {
3242 /* Make the file fid point to xattr */
3243 xattr_fidp
= file_fidp
;
3244 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3245 xattr_fidp
->fs
.xattr
.copied_len
= 0;
3246 xattr_fidp
->fs
.xattr
.len
= size
;
3247 xattr_fidp
->fs
.xattr
.flags
= flags
;
3248 v9fs_string_init(&xattr_fidp
->fs
.xattr
.name
);
3249 v9fs_string_copy(&xattr_fidp
->fs
.xattr
.name
, &name
);
3251 xattr_fidp
->fs
.xattr
.value
= qemu_malloc(size
);
3253 xattr_fidp
->fs
.xattr
.value
= NULL
;
3257 complete_pdu(s
, pdu
, err
);
3258 v9fs_string_free(&name
);
3261 static void v9fs_readlink(void *opaque
)
3263 V9fsPDU
*pdu
= opaque
;
3270 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3271 fidp
= lookup_fid(pdu
->s
, fid
);
3277 v9fs_string_init(&target
);
3278 err
= v9fs_co_readlink(pdu
->s
, &fidp
->path
, &target
);
3282 offset
+= pdu_marshal(pdu
, offset
, "s", &target
);
3284 v9fs_string_free(&target
);
3286 complete_pdu(pdu
->s
, pdu
, err
);
3289 static CoroutineEntry
*pdu_co_handlers
[] = {
3290 [P9_TREADDIR
] = v9fs_readdir
,
3291 [P9_TSTATFS
] = v9fs_statfs
,
3292 [P9_TGETATTR
] = v9fs_getattr
,
3293 [P9_TSETATTR
] = v9fs_setattr
,
3294 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
3295 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
3296 [P9_TMKNOD
] = v9fs_mknod
,
3297 [P9_TRENAME
] = v9fs_rename
,
3298 [P9_TLOCK
] = v9fs_lock
,
3299 [P9_TGETLOCK
] = v9fs_getlock
,
3300 [P9_TREADLINK
] = v9fs_readlink
,
3301 [P9_TMKDIR
] = v9fs_mkdir
,
3302 [P9_TVERSION
] = v9fs_version
,
3303 [P9_TLOPEN
] = v9fs_open
,
3304 [P9_TATTACH
] = v9fs_attach
,
3305 [P9_TSTAT
] = v9fs_stat
,
3306 [P9_TWALK
] = v9fs_walk
,
3307 [P9_TCLUNK
] = v9fs_clunk
,
3308 [P9_TFSYNC
] = v9fs_fsync
,
3309 [P9_TOPEN
] = v9fs_open
,
3310 [P9_TREAD
] = v9fs_read
,
3312 [P9_TAUTH
] = v9fs_auth
,
3314 [P9_TFLUSH
] = v9fs_flush
,
3315 [P9_TLINK
] = v9fs_link
,
3316 [P9_TSYMLINK
] = v9fs_symlink
,
3317 [P9_TCREATE
] = v9fs_create
,
3318 [P9_TLCREATE
] = v9fs_lcreate
,
3319 [P9_TWRITE
] = v9fs_write
,
3320 [P9_TWSTAT
] = v9fs_wstat
,
3321 [P9_TREMOVE
] = v9fs_remove
,
3324 static void v9fs_op_not_supp(void *opaque
)
3326 V9fsPDU
*pdu
= opaque
;
3327 complete_pdu(pdu
->s
, pdu
, -EOPNOTSUPP
);
3330 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3333 CoroutineEntry
*handler
;
3338 if (pdu
->id
>= ARRAY_SIZE(pdu_co_handlers
) ||
3339 (pdu_co_handlers
[pdu
->id
] == NULL
)) {
3340 handler
= v9fs_op_not_supp
;
3342 handler
= pdu_co_handlers
[pdu
->id
];
3344 co
= qemu_coroutine_create(handler
);
3345 qemu_coroutine_enter(co
, pdu
);
3348 void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3350 V9fsState
*s
= (V9fsState
*)vdev
;
3354 while ((pdu
= alloc_pdu(s
)) &&
3355 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3358 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3359 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3361 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3363 memcpy(&pdu
->size
, ptr
, 4);
3365 memcpy(&pdu
->tag
, ptr
+ 5, 2);