]>
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 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_mkdir(V9fsState
*s
, char *name
, mode_t mode
,
153 uid_t uid
, gid_t gid
)
162 return s
->ops
->mkdir(&s
->ctx
, name
, &cred
);
165 static int v9fs_do_fstat(V9fsState
*s
, int fd
, struct stat
*stbuf
)
167 return s
->ops
->fstat(&s
->ctx
, fd
, stbuf
);
170 static int v9fs_do_open2(V9fsState
*s
, char *fullname
, uid_t uid
, gid_t gid
,
178 cred
.fc_mode
= mode
& 07777;
180 return s
->ops
->open2(&s
->ctx
, fullname
, flags
, &cred
);
183 static int v9fs_do_symlink(V9fsState
*s
, V9fsFidState
*fidp
,
184 const char *oldpath
, const char *newpath
, gid_t gid
)
188 cred
.fc_uid
= fidp
->uid
;
192 return s
->ops
->symlink(&s
->ctx
, oldpath
, newpath
, &cred
);
195 static int v9fs_do_link(V9fsState
*s
, V9fsString
*oldpath
, V9fsString
*newpath
)
197 return s
->ops
->link(&s
->ctx
, oldpath
->data
, newpath
->data
);
200 static int v9fs_do_truncate(V9fsState
*s
, V9fsString
*path
, off_t size
)
202 return s
->ops
->truncate(&s
->ctx
, path
->data
, size
);
205 static int v9fs_do_rename(V9fsState
*s
, V9fsString
*oldpath
,
208 return s
->ops
->rename(&s
->ctx
, oldpath
->data
, newpath
->data
);
211 static int v9fs_do_chown(V9fsState
*s
, V9fsString
*path
, uid_t uid
, gid_t gid
)
218 return s
->ops
->chown(&s
->ctx
, path
->data
, &cred
);
221 static int v9fs_do_utimensat(V9fsState
*s
, V9fsString
*path
,
222 const struct timespec times
[2])
224 return s
->ops
->utimensat(&s
->ctx
, path
->data
, times
);
227 static int v9fs_do_remove(V9fsState
*s
, V9fsString
*path
)
229 return s
->ops
->remove(&s
->ctx
, path
->data
);
232 static int v9fs_do_fsync(V9fsState
*s
, int fd
, int datasync
)
234 return s
->ops
->fsync(&s
->ctx
, fd
, datasync
);
237 static int v9fs_do_statfs(V9fsState
*s
, V9fsString
*path
, struct statfs
*stbuf
)
239 return s
->ops
->statfs(&s
->ctx
, path
->data
, stbuf
);
242 static ssize_t
v9fs_do_lgetxattr(V9fsState
*s
, V9fsString
*path
,
243 V9fsString
*xattr_name
,
244 void *value
, size_t size
)
246 return s
->ops
->lgetxattr(&s
->ctx
, path
->data
,
247 xattr_name
->data
, value
, size
);
250 static ssize_t
v9fs_do_llistxattr(V9fsState
*s
, V9fsString
*path
,
251 void *value
, size_t size
)
253 return s
->ops
->llistxattr(&s
->ctx
, path
->data
,
257 static int v9fs_do_lsetxattr(V9fsState
*s
, V9fsString
*path
,
258 V9fsString
*xattr_name
,
259 void *value
, size_t size
, int flags
)
261 return s
->ops
->lsetxattr(&s
->ctx
, path
->data
,
262 xattr_name
->data
, value
, size
, flags
);
265 static int v9fs_do_lremovexattr(V9fsState
*s
, V9fsString
*path
,
266 V9fsString
*xattr_name
)
268 return s
->ops
->lremovexattr(&s
->ctx
, path
->data
,
273 static void v9fs_string_init(V9fsString
*str
)
279 static void v9fs_string_free(V9fsString
*str
)
281 qemu_free(str
->data
);
286 static void v9fs_string_null(V9fsString
*str
)
288 v9fs_string_free(str
);
291 static int number_to_string(void *arg
, char type
)
293 unsigned int ret
= 0;
297 unsigned int num
= *(unsigned int *)arg
;
306 unsigned long num
= *(unsigned long *)arg
;
314 printf("Number_to_string: Unknown number format\n");
321 static int GCC_FMT_ATTR(2, 0)
322 v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
325 char *iter
= (char *)fmt
;
329 unsigned int arg_uint
;
330 unsigned long arg_ulong
;
332 /* Find the number of %'s that denotes an argument */
333 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
338 len
= strlen(fmt
) - 2*nr_args
;
348 /* Now parse the format string */
349 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
353 arg_uint
= va_arg(ap2
, unsigned int);
354 len
+= number_to_string((void *)&arg_uint
, 'u');
357 if (*++iter
== 'u') {
358 arg_ulong
= va_arg(ap2
, unsigned long);
359 len
+= number_to_string((void *)&arg_ulong
, 'U');
365 arg_char_ptr
= va_arg(ap2
, char *);
366 len
+= strlen(arg_char_ptr
);
373 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
380 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
382 return vsprintf(*strp
, fmt
, ap
);
385 static void GCC_FMT_ATTR(2, 3)
386 v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
391 v9fs_string_free(str
);
394 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
401 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
403 v9fs_string_free(lhs
);
404 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
408 * Return TRUE if s1 is an ancestor of s2.
410 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
411 * As a special case, We treat s1 as ancestor of s2 if they are same!
413 static int v9fs_path_is_ancestor(V9fsString
*s1
, V9fsString
*s2
)
415 if (!strncmp(s1
->data
, s2
->data
, s1
->size
)) {
416 if (s2
->data
[s1
->size
] == '\0' || s2
->data
[s1
->size
] == '/') {
423 static size_t v9fs_string_size(V9fsString
*str
)
428 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
432 for (f
= s
->fid_list
; f
; f
= f
->next
) {
441 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
445 f
= lookup_fid(s
, fid
);
450 f
= qemu_mallocz(sizeof(V9fsFidState
));
453 f
->fid_type
= P9_FID_NONE
;
455 f
->next
= s
->fid_list
;
461 static int v9fs_xattr_fid_clunk(V9fsState
*s
, V9fsFidState
*fidp
)
465 if (fidp
->fs
.xattr
.copied_len
== -1) {
466 /* getxattr/listxattr fid */
470 * if this is fid for setxattr. clunk should
471 * result in setxattr localcall
473 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
474 /* clunk after partial write */
478 if (fidp
->fs
.xattr
.len
) {
479 retval
= v9fs_do_lsetxattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
480 fidp
->fs
.xattr
.value
,
482 fidp
->fs
.xattr
.flags
);
484 retval
= v9fs_do_lremovexattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
);
487 v9fs_string_free(&fidp
->fs
.xattr
.name
);
489 if (fidp
->fs
.xattr
.value
) {
490 qemu_free(fidp
->fs
.xattr
.value
);
495 static int free_fid(V9fsState
*s
, int32_t fid
)
498 V9fsFidState
**fidpp
, *fidp
;
500 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
501 if ((*fidpp
)->fid
== fid
) {
506 if (*fidpp
== NULL
) {
513 if (fidp
->fid_type
== P9_FID_FILE
) {
514 v9fs_do_close(s
, fidp
->fs
.fd
);
515 } else if (fidp
->fid_type
== P9_FID_DIR
) {
516 v9fs_do_closedir(s
, fidp
->fs
.dir
);
517 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
518 retval
= v9fs_xattr_fid_clunk(s
, fidp
);
520 v9fs_string_free(&fidp
->path
);
526 #define P9_QID_TYPE_DIR 0x80
527 #define P9_QID_TYPE_SYMLINK 0x02
529 #define P9_STAT_MODE_DIR 0x80000000
530 #define P9_STAT_MODE_APPEND 0x40000000
531 #define P9_STAT_MODE_EXCL 0x20000000
532 #define P9_STAT_MODE_MOUNT 0x10000000
533 #define P9_STAT_MODE_AUTH 0x08000000
534 #define P9_STAT_MODE_TMP 0x04000000
535 #define P9_STAT_MODE_SYMLINK 0x02000000
536 #define P9_STAT_MODE_LINK 0x01000000
537 #define P9_STAT_MODE_DEVICE 0x00800000
538 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
539 #define P9_STAT_MODE_SOCKET 0x00100000
540 #define P9_STAT_MODE_SETUID 0x00080000
541 #define P9_STAT_MODE_SETGID 0x00040000
542 #define P9_STAT_MODE_SETVTX 0x00010000
544 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
545 P9_STAT_MODE_SYMLINK | \
546 P9_STAT_MODE_LINK | \
547 P9_STAT_MODE_DEVICE | \
548 P9_STAT_MODE_NAMED_PIPE | \
551 /* This is the algorithm from ufs in spfs */
552 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
556 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
557 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
558 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
560 if (S_ISDIR(stbuf
->st_mode
)) {
561 qidp
->type
|= P9_QID_TYPE_DIR
;
563 if (S_ISLNK(stbuf
->st_mode
)) {
564 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
568 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
573 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
578 stat_to_qid(&stbuf
, qidp
);
582 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
586 if (!QLIST_EMPTY(&s
->free_list
)) {
587 pdu
= QLIST_FIRST(&s
->free_list
);
588 QLIST_REMOVE(pdu
, next
);
593 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
599 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
603 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
604 size_t offset
, size_t size
, int pack
)
609 for (i
= 0; size
&& i
< sg_count
; i
++) {
611 if (offset
>= sg
[i
].iov_len
) {
613 offset
-= sg
[i
].iov_len
;
616 len
= MIN(sg
[i
].iov_len
- offset
, size
);
618 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
620 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
635 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
637 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
641 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
644 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
648 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
652 struct iovec
*src_sg
;
656 src_sg
= pdu
->elem
.in_sg
;
657 num
= pdu
->elem
.in_num
;
659 src_sg
= pdu
->elem
.out_sg
;
660 num
= pdu
->elem
.out_num
;
664 for (i
= 0; i
< num
; i
++) {
666 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
667 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
669 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
670 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
671 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
672 sg
[j
].iov_base
+= (offset
- pos
);
673 sg
[j
].iov_len
-= (offset
- pos
);
676 pos
+= src_sg
[i
].iov_len
;
682 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
684 size_t old_offset
= offset
;
689 for (i
= 0; fmt
[i
]; i
++) {
692 uint8_t *valp
= va_arg(ap
, uint8_t *);
693 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
698 valp
= va_arg(ap
, uint16_t *);
699 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
700 *valp
= le16_to_cpu(val
);
705 valp
= va_arg(ap
, uint32_t *);
706 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
707 *valp
= le32_to_cpu(val
);
712 valp
= va_arg(ap
, uint64_t *);
713 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
714 *valp
= le64_to_cpu(val
);
718 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
719 int *iovcnt
= va_arg(ap
, int *);
720 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
724 V9fsString
*str
= va_arg(ap
, V9fsString
*);
725 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
726 /* FIXME: sanity check str->size */
727 str
->data
= qemu_malloc(str
->size
+ 1);
728 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
729 str
->data
[str
->size
] = 0;
733 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
734 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
735 &qidp
->type
, &qidp
->version
, &qidp
->path
);
739 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
740 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
741 &statp
->size
, &statp
->type
, &statp
->dev
,
742 &statp
->qid
, &statp
->mode
, &statp
->atime
,
743 &statp
->mtime
, &statp
->length
,
744 &statp
->name
, &statp
->uid
, &statp
->gid
,
745 &statp
->muid
, &statp
->extension
,
746 &statp
->n_uid
, &statp
->n_gid
,
751 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
752 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
753 &iattr
->valid
, &iattr
->mode
,
754 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
755 &iattr
->atime_sec
, &iattr
->atime_nsec
,
756 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
766 return offset
- old_offset
;
769 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
771 size_t old_offset
= offset
;
776 for (i
= 0; fmt
[i
]; i
++) {
779 uint8_t val
= va_arg(ap
, int);
780 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
785 cpu_to_le16w(&val
, va_arg(ap
, int));
786 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
791 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
792 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
797 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
798 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
802 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
803 int *iovcnt
= va_arg(ap
, int *);
804 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
808 V9fsString
*str
= va_arg(ap
, V9fsString
*);
809 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
810 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
814 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
815 offset
+= pdu_marshal(pdu
, offset
, "bdq",
816 qidp
->type
, qidp
->version
, qidp
->path
);
820 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
821 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
822 statp
->size
, statp
->type
, statp
->dev
,
823 &statp
->qid
, statp
->mode
, statp
->atime
,
824 statp
->mtime
, statp
->length
, &statp
->name
,
825 &statp
->uid
, &statp
->gid
, &statp
->muid
,
826 &statp
->extension
, statp
->n_uid
,
827 statp
->n_gid
, statp
->n_muid
);
831 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
832 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
833 statp
->st_result_mask
,
834 &statp
->qid
, statp
->st_mode
,
835 statp
->st_uid
, statp
->st_gid
,
836 statp
->st_nlink
, statp
->st_rdev
,
837 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
838 statp
->st_atime_sec
, statp
->st_atime_nsec
,
839 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
840 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
841 statp
->st_btime_sec
, statp
->st_btime_nsec
,
842 statp
->st_gen
, statp
->st_data_version
);
851 return offset
- old_offset
;
854 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
856 int8_t id
= pdu
->id
+ 1; /* Response */
862 if (s
->proto_version
!= V9FS_PROTO_2000L
) {
865 str
.data
= strerror(err
);
866 str
.size
= strlen(str
.data
);
868 len
+= pdu_marshal(pdu
, len
, "s", &str
);
872 len
+= pdu_marshal(pdu
, len
, "d", err
);
874 if (s
->proto_version
== V9FS_PROTO_2000L
) {
879 /* fill out the header */
880 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
882 /* keep these in sync */
886 /* push onto queue and notify */
887 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
889 /* FIXME: we should batch these completions */
890 virtio_notify(&s
->vdev
, s
->vq
);
895 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
900 if (mode
& P9_STAT_MODE_DIR
) {
904 if (mode
& P9_STAT_MODE_SYMLINK
) {
907 if (mode
& P9_STAT_MODE_SOCKET
) {
910 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
913 if (mode
& P9_STAT_MODE_DEVICE
) {
914 if (extension
&& extension
->data
[0] == 'c') {
925 if (mode
& P9_STAT_MODE_SETUID
) {
928 if (mode
& P9_STAT_MODE_SETGID
) {
931 if (mode
& P9_STAT_MODE_SETVTX
) {
938 static int donttouch_stat(V9fsStat
*stat
)
940 if (stat
->type
== -1 &&
942 stat
->qid
.type
== -1 &&
943 stat
->qid
.version
== -1 &&
944 stat
->qid
.path
== -1 &&
948 stat
->length
== -1 &&
955 stat
->n_muid
== -1) {
962 static void v9fs_stat_free(V9fsStat
*stat
)
964 v9fs_string_free(&stat
->name
);
965 v9fs_string_free(&stat
->uid
);
966 v9fs_string_free(&stat
->gid
);
967 v9fs_string_free(&stat
->muid
);
968 v9fs_string_free(&stat
->extension
);
971 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
975 mode
= stbuf
->st_mode
& 0777;
976 if (S_ISDIR(stbuf
->st_mode
)) {
977 mode
|= P9_STAT_MODE_DIR
;
980 if (S_ISLNK(stbuf
->st_mode
)) {
981 mode
|= P9_STAT_MODE_SYMLINK
;
984 if (S_ISSOCK(stbuf
->st_mode
)) {
985 mode
|= P9_STAT_MODE_SOCKET
;
988 if (S_ISFIFO(stbuf
->st_mode
)) {
989 mode
|= P9_STAT_MODE_NAMED_PIPE
;
992 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
993 mode
|= P9_STAT_MODE_DEVICE
;
996 if (stbuf
->st_mode
& S_ISUID
) {
997 mode
|= P9_STAT_MODE_SETUID
;
1000 if (stbuf
->st_mode
& S_ISGID
) {
1001 mode
|= P9_STAT_MODE_SETGID
;
1004 if (stbuf
->st_mode
& S_ISVTX
) {
1005 mode
|= P9_STAT_MODE_SETVTX
;
1011 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
1012 const struct stat
*stbuf
,
1018 memset(v9stat
, 0, sizeof(*v9stat
));
1020 stat_to_qid(stbuf
, &v9stat
->qid
);
1021 v9stat
->mode
= stat_to_v9mode(stbuf
);
1022 v9stat
->atime
= stbuf
->st_atime
;
1023 v9stat
->mtime
= stbuf
->st_mtime
;
1024 v9stat
->length
= stbuf
->st_size
;
1026 v9fs_string_null(&v9stat
->uid
);
1027 v9fs_string_null(&v9stat
->gid
);
1028 v9fs_string_null(&v9stat
->muid
);
1030 v9stat
->n_uid
= stbuf
->st_uid
;
1031 v9stat
->n_gid
= stbuf
->st_gid
;
1034 v9fs_string_null(&v9stat
->extension
);
1036 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
1037 err
= v9fs_co_readlink(s
, name
, &v9stat
->extension
);
1041 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
1042 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
1043 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
1044 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
1045 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
1046 v9fs_string_sprintf(&v9stat
->extension
, "%s %lu",
1047 "HARDLINKCOUNT", (unsigned long)stbuf
->st_nlink
);
1050 str
= strrchr(name
->data
, '/');
1057 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
1060 v9fs_string_size(&v9stat
->name
) +
1061 v9fs_string_size(&v9stat
->uid
) +
1062 v9fs_string_size(&v9stat
->gid
) +
1063 v9fs_string_size(&v9stat
->muid
) +
1064 v9fs_string_size(&v9stat
->extension
);
1068 #define P9_STATS_MODE 0x00000001ULL
1069 #define P9_STATS_NLINK 0x00000002ULL
1070 #define P9_STATS_UID 0x00000004ULL
1071 #define P9_STATS_GID 0x00000008ULL
1072 #define P9_STATS_RDEV 0x00000010ULL
1073 #define P9_STATS_ATIME 0x00000020ULL
1074 #define P9_STATS_MTIME 0x00000040ULL
1075 #define P9_STATS_CTIME 0x00000080ULL
1076 #define P9_STATS_INO 0x00000100ULL
1077 #define P9_STATS_SIZE 0x00000200ULL
1078 #define P9_STATS_BLOCKS 0x00000400ULL
1080 #define P9_STATS_BTIME 0x00000800ULL
1081 #define P9_STATS_GEN 0x00001000ULL
1082 #define P9_STATS_DATA_VERSION 0x00002000ULL
1084 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1085 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1088 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1089 V9fsStatDotl
*v9lstat
)
1091 memset(v9lstat
, 0, sizeof(*v9lstat
));
1093 v9lstat
->st_mode
= stbuf
->st_mode
;
1094 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1095 v9lstat
->st_uid
= stbuf
->st_uid
;
1096 v9lstat
->st_gid
= stbuf
->st_gid
;
1097 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1098 v9lstat
->st_size
= stbuf
->st_size
;
1099 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1100 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1101 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1102 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1103 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1104 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1105 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1106 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1107 /* Currently we only support BASIC fields in stat */
1108 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1110 stat_to_qid(stbuf
, &v9lstat
->qid
);
1113 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1115 while (len
&& *iovcnt
) {
1116 if (len
< sg
->iov_len
) {
1118 sg
->iov_base
+= len
;
1130 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1135 for (i
= 0; i
< *cnt
; i
++) {
1136 if ((total
+ sg
[i
].iov_len
) > cap
) {
1137 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1141 total
+= sg
[i
].iov_len
;
1149 static void print_sg(struct iovec
*sg
, int cnt
)
1153 printf("sg[%d]: {", cnt
);
1154 for (i
= 0; i
< cnt
; i
++) {
1158 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1163 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1166 v9fs_string_init(&str
);
1167 v9fs_string_copy(&str
, dst
);
1168 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1169 v9fs_string_free(&str
);
1172 static void v9fs_version(void *opaque
)
1174 V9fsPDU
*pdu
= opaque
;
1175 V9fsState
*s
= pdu
->s
;
1179 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1181 if (!strcmp(version
.data
, "9P2000.u")) {
1182 s
->proto_version
= V9FS_PROTO_2000U
;
1183 } else if (!strcmp(version
.data
, "9P2000.L")) {
1184 s
->proto_version
= V9FS_PROTO_2000L
;
1186 v9fs_string_sprintf(&version
, "unknown");
1189 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1190 complete_pdu(s
, pdu
, offset
);
1192 v9fs_string_free(&version
);
1196 static void v9fs_attach(void *opaque
)
1198 V9fsPDU
*pdu
= opaque
;
1199 V9fsState
*s
= pdu
->s
;
1200 int32_t fid
, afid
, n_uname
;
1201 V9fsString uname
, aname
;
1207 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1209 fidp
= alloc_fid(s
, fid
);
1215 fidp
->uid
= n_uname
;
1217 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1218 err
= fid_to_qid(s
, fidp
, &qid
);
1225 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1229 complete_pdu(s
, pdu
, err
);
1230 v9fs_string_free(&uname
);
1231 v9fs_string_free(&aname
);
1234 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1241 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1245 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1249 complete_pdu(s
, vs
->pdu
, err
);
1250 v9fs_stat_free(&vs
->v9stat
);
1254 static void v9fs_stat(void *opaque
)
1256 V9fsPDU
*pdu
= opaque
;
1257 V9fsState
*s
= pdu
->s
;
1262 vs
= qemu_malloc(sizeof(*vs
));
1266 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1268 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1270 vs
->fidp
= lookup_fid(s
, fid
);
1271 if (vs
->fidp
== NULL
) {
1276 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1277 v9fs_stat_post_lstat(s
, vs
, err
);
1281 complete_pdu(s
, vs
->pdu
, err
);
1282 v9fs_stat_free(&vs
->v9stat
);
1286 static void v9fs_getattr_post_lstat(V9fsState
*s
, V9fsStatStateDotl
*vs
,
1294 stat_to_v9stat_dotl(s
, &vs
->stbuf
, &vs
->v9stat_dotl
);
1295 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "A", &vs
->v9stat_dotl
);
1299 complete_pdu(s
, vs
->pdu
, err
);
1303 static void v9fs_getattr(void *opaque
)
1305 V9fsPDU
*pdu
= opaque
;
1306 V9fsState
*s
= pdu
->s
;
1308 V9fsStatStateDotl
*vs
;
1311 uint64_t request_mask
;
1313 vs
= qemu_malloc(sizeof(*vs
));
1317 memset(&vs
->v9stat_dotl
, 0, sizeof(vs
->v9stat_dotl
));
1319 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dq", &fid
, &request_mask
);
1321 fidp
= lookup_fid(s
, fid
);
1327 /* Currently we only support BASIC fields in stat, so there is no
1328 * need to look at request_mask.
1330 err
= v9fs_do_lstat(s
, &fidp
->path
, &vs
->stbuf
);
1331 v9fs_getattr_post_lstat(s
, vs
, err
);
1335 complete_pdu(s
, vs
->pdu
, err
);
1339 /* From Linux kernel code */
1340 #define ATTR_MODE (1 << 0)
1341 #define ATTR_UID (1 << 1)
1342 #define ATTR_GID (1 << 2)
1343 #define ATTR_SIZE (1 << 3)
1344 #define ATTR_ATIME (1 << 4)
1345 #define ATTR_MTIME (1 << 5)
1346 #define ATTR_CTIME (1 << 6)
1347 #define ATTR_MASK 127
1348 #define ATTR_ATIME_SET (1 << 7)
1349 #define ATTR_MTIME_SET (1 << 8)
1351 static void v9fs_setattr_post_truncate(V9fsState
*s
, V9fsSetattrState
*vs
,
1361 complete_pdu(s
, vs
->pdu
, err
);
1365 static void v9fs_setattr_post_chown(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1372 if (vs
->v9iattr
.valid
& (ATTR_SIZE
)) {
1373 err
= v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9iattr
.size
);
1375 v9fs_setattr_post_truncate(s
, vs
, err
);
1379 complete_pdu(s
, vs
->pdu
, err
);
1383 static void v9fs_setattr_post_utimensat(V9fsState
*s
, V9fsSetattrState
*vs
,
1391 /* If the only valid entry in iattr is ctime we can call
1392 * chown(-1,-1) to update the ctime of the file
1394 if ((vs
->v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1395 ((vs
->v9iattr
.valid
& ATTR_CTIME
)
1396 && !((vs
->v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1397 if (!(vs
->v9iattr
.valid
& ATTR_UID
)) {
1398 vs
->v9iattr
.uid
= -1;
1400 if (!(vs
->v9iattr
.valid
& ATTR_GID
)) {
1401 vs
->v9iattr
.gid
= -1;
1403 err
= v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9iattr
.uid
,
1406 v9fs_setattr_post_chown(s
, vs
, err
);
1410 complete_pdu(s
, vs
->pdu
, err
);
1414 static void v9fs_setattr_post_chmod(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1421 if (vs
->v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1422 struct timespec times
[2];
1423 if (vs
->v9iattr
.valid
& ATTR_ATIME
) {
1424 if (vs
->v9iattr
.valid
& ATTR_ATIME_SET
) {
1425 times
[0].tv_sec
= vs
->v9iattr
.atime_sec
;
1426 times
[0].tv_nsec
= vs
->v9iattr
.atime_nsec
;
1428 times
[0].tv_nsec
= UTIME_NOW
;
1431 times
[0].tv_nsec
= UTIME_OMIT
;
1434 if (vs
->v9iattr
.valid
& ATTR_MTIME
) {
1435 if (vs
->v9iattr
.valid
& ATTR_MTIME_SET
) {
1436 times
[1].tv_sec
= vs
->v9iattr
.mtime_sec
;
1437 times
[1].tv_nsec
= vs
->v9iattr
.mtime_nsec
;
1439 times
[1].tv_nsec
= UTIME_NOW
;
1442 times
[1].tv_nsec
= UTIME_OMIT
;
1444 err
= v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
);
1446 v9fs_setattr_post_utimensat(s
, vs
, err
);
1450 complete_pdu(s
, vs
->pdu
, err
);
1454 static void v9fs_setattr(void *opaque
)
1456 V9fsPDU
*pdu
= opaque
;
1457 V9fsState
*s
= pdu
->s
;
1459 V9fsSetattrState
*vs
;
1462 vs
= qemu_malloc(sizeof(*vs
));
1466 pdu_unmarshal(pdu
, vs
->offset
, "dI", &fid
, &vs
->v9iattr
);
1468 vs
->fidp
= lookup_fid(s
, fid
);
1469 if (vs
->fidp
== NULL
) {
1474 if (vs
->v9iattr
.valid
& ATTR_MODE
) {
1475 err
= v9fs_do_chmod(s
, &vs
->fidp
->path
, vs
->v9iattr
.mode
);
1478 v9fs_setattr_post_chmod(s
, vs
, err
);
1482 complete_pdu(s
, vs
->pdu
, err
);
1486 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1488 complete_pdu(s
, vs
->pdu
, err
);
1490 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1491 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1492 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1495 qemu_free(vs
->wnames
);
1496 qemu_free(vs
->qids
);
1500 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1504 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1506 for (i
= 0; i
< vs
->nwnames
; i
++) {
1507 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1511 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1515 free_fid(s
, vs
->newfidp
->fid
);
1516 v9fs_string_free(&vs
->path
);
1521 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1524 if (vs
->name_idx
< vs
->nwnames
) {
1525 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1526 vs
->wnames
[vs
->name_idx
].data
);
1527 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1529 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1530 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1534 v9fs_string_free(&vs
->path
);
1535 v9fs_walk_marshal(vs
);
1538 v9fs_walk_complete(s
, vs
, err
);
1541 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1545 v9fs_string_free(&vs
->path
);
1550 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1552 if (vs
->name_idx
< vs
->nwnames
) {
1554 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1555 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1556 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1558 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1559 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1563 v9fs_string_free(&vs
->path
);
1564 v9fs_walk_marshal(vs
);
1567 v9fs_walk_complete(s
, vs
, err
);
1570 static void v9fs_walk(void *opaque
)
1572 V9fsPDU
*pdu
= opaque
;
1573 V9fsState
*s
= pdu
->s
;
1574 int32_t fid
, newfid
;
1579 vs
= qemu_malloc(sizeof(*vs
));
1585 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1586 &newfid
, &vs
->nwnames
);
1588 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1589 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1591 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1593 for (i
= 0; i
< vs
->nwnames
; i
++) {
1594 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1597 } else if (vs
->nwnames
> P9_MAXWELEM
) {
1602 vs
->fidp
= lookup_fid(s
, fid
);
1603 if (vs
->fidp
== NULL
) {
1608 /* FIXME: is this really valid? */
1609 if (fid
== newfid
) {
1611 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1612 v9fs_string_init(&vs
->path
);
1615 if (vs
->name_idx
< vs
->nwnames
) {
1616 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1617 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1618 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1620 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1621 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1625 vs
->newfidp
= alloc_fid(s
, newfid
);
1626 if (vs
->newfidp
== NULL
) {
1631 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1632 v9fs_string_init(&vs
->path
);
1634 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1636 if (vs
->name_idx
< vs
->nwnames
) {
1637 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1638 vs
->wnames
[vs
->name_idx
].data
);
1639 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1641 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1642 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1647 v9fs_walk_marshal(vs
);
1650 v9fs_walk_complete(s
, vs
, err
);
1653 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1655 struct statfs stbuf
;
1659 * iounit should be multiples of f_bsize (host filesystem block size
1660 * and as well as less than (client msize - P9_IOHDRSZ))
1662 if (!v9fs_do_statfs(s
, name
, &stbuf
)) {
1663 iounit
= stbuf
.f_bsize
;
1664 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1668 iounit
= s
->msize
- P9_IOHDRSZ
;
1673 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1675 if (vs
->fidp
->fs
.dir
== NULL
) {
1679 vs
->fidp
->fid_type
= P9_FID_DIR
;
1680 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1683 complete_pdu(s
, vs
->pdu
, err
);
1688 static void v9fs_open_post_getiounit(V9fsState
*s
, V9fsOpenState
*vs
)
1691 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
1693 complete_pdu(s
, vs
->pdu
, err
);
1697 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1699 if (vs
->fidp
->fs
.fd
== -1) {
1703 vs
->fidp
->fid_type
= P9_FID_FILE
;
1704 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
1705 v9fs_open_post_getiounit(s
, vs
);
1708 complete_pdu(s
, vs
->pdu
, err
);
1712 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1721 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1723 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1724 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1725 v9fs_open_post_opendir(s
, vs
, err
);
1727 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1729 flags
&= ~(O_NOCTTY
| O_ASYNC
| O_CREAT
);
1730 /* Ignore direct disk access hint until the server supports it. */
1733 flags
= omode_to_uflags(vs
->mode
);
1735 vs
->fidp
->fs
.fd
= v9fs_do_open(s
, &vs
->fidp
->path
, flags
);
1736 v9fs_open_post_open(s
, vs
, err
);
1740 complete_pdu(s
, vs
->pdu
, err
);
1744 static void v9fs_open(void *opaque
)
1746 V9fsPDU
*pdu
= opaque
;
1747 V9fsState
*s
= pdu
->s
;
1752 vs
= qemu_malloc(sizeof(*vs
));
1757 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1758 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dd", &fid
, &vs
->mode
);
1760 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1763 vs
->fidp
= lookup_fid(s
, fid
);
1764 if (vs
->fidp
== NULL
) {
1769 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1771 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1773 v9fs_open_post_lstat(s
, vs
, err
);
1776 complete_pdu(s
, pdu
, err
);
1780 static void v9fs_post_lcreate(V9fsState
*s
, V9fsLcreateState
*vs
, int err
)
1783 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
1784 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1785 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
,
1789 vs
->fidp
->fid_type
= P9_FID_NONE
;
1791 if (vs
->fidp
->fs
.fd
> 0) {
1792 close(vs
->fidp
->fs
.fd
);
1796 complete_pdu(s
, vs
->pdu
, err
);
1797 v9fs_string_free(&vs
->name
);
1798 v9fs_string_free(&vs
->fullname
);
1802 static void v9fs_lcreate_post_get_iounit(V9fsState
*s
, V9fsLcreateState
*vs
,
1809 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1812 v9fs_post_lcreate(s
, vs
, err
);
1815 static void v9fs_lcreate_post_do_open2(V9fsState
*s
, V9fsLcreateState
*vs
,
1818 if (vs
->fidp
->fs
.fd
== -1) {
1822 vs
->fidp
->fid_type
= P9_FID_FILE
;
1823 vs
->iounit
= get_iounit(s
, &vs
->fullname
);
1824 v9fs_lcreate_post_get_iounit(s
, vs
, err
);
1828 v9fs_post_lcreate(s
, vs
, err
);
1831 static void v9fs_lcreate(void *opaque
)
1833 V9fsPDU
*pdu
= opaque
;
1834 V9fsState
*s
= pdu
->s
;
1835 int32_t dfid
, flags
, mode
;
1837 V9fsLcreateState
*vs
;
1840 vs
= qemu_malloc(sizeof(*vs
));
1844 v9fs_string_init(&vs
->fullname
);
1846 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsddd", &dfid
, &vs
->name
, &flags
,
1849 vs
->fidp
= lookup_fid(s
, dfid
);
1850 if (vs
->fidp
== NULL
) {
1855 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
1858 /* Ignore direct disk access hint until the server supports it. */
1861 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
1863 v9fs_lcreate_post_do_open2(s
, vs
, err
);
1867 complete_pdu(s
, vs
->pdu
, err
);
1868 v9fs_string_free(&vs
->name
);
1872 static void v9fs_post_do_fsync(V9fsState
*s
, V9fsPDU
*pdu
, int err
)
1877 complete_pdu(s
, pdu
, err
);
1880 static void v9fs_fsync(void *opaque
)
1882 V9fsPDU
*pdu
= opaque
;
1883 V9fsState
*s
= pdu
->s
;
1890 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &datasync
);
1891 fidp
= lookup_fid(s
, fid
);
1894 v9fs_post_do_fsync(s
, pdu
, err
);
1897 err
= v9fs_do_fsync(s
, fidp
->fs
.fd
, datasync
);
1898 v9fs_post_do_fsync(s
, pdu
, err
);
1901 static void v9fs_clunk(void *opaque
)
1903 V9fsPDU
*pdu
= opaque
;
1904 V9fsState
*s
= pdu
->s
;
1909 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1911 err
= free_fid(s
, fid
);
1919 complete_pdu(s
, pdu
, err
);
1922 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1924 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1929 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1930 vs
->offset
+= vs
->count
;
1933 complete_pdu(s
, vs
->pdu
, err
);
1934 v9fs_stat_free(&vs
->v9stat
);
1935 v9fs_string_free(&vs
->name
);
1940 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1947 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1952 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1954 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1955 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1956 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1957 v9fs_read_post_seekdir(s
, vs
, err
);
1960 vs
->count
+= vs
->len
;
1961 v9fs_stat_free(&vs
->v9stat
);
1962 v9fs_string_free(&vs
->name
);
1963 vs
->dir_pos
= vs
->dent
->d_off
;
1964 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1965 v9fs_read_post_readdir(s
, vs
, err
);
1968 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1969 v9fs_read_post_seekdir(s
, vs
, err
);
1974 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1977 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1978 v9fs_string_init(&vs
->name
);
1979 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1981 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1982 v9fs_read_post_dir_lstat(s
, vs
, err
);
1986 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1987 vs
->offset
+= vs
->count
;
1989 complete_pdu(s
, vs
->pdu
, err
);
1994 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1996 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1997 v9fs_read_post_readdir(s
, vs
, err
);
2001 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
2004 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
2005 v9fs_read_post_telldir(s
, vs
, err
);
2009 static void v9fs_read_post_preadv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
2012 /* IO error return the error */
2016 vs
->total
+= vs
->len
;
2017 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2018 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2021 print_sg(vs
->sg
, vs
->cnt
);
2023 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2028 } while (vs
->len
== -1 && errno
== EINTR
);
2029 if (vs
->len
== -1) {
2032 v9fs_read_post_preadv(s
, vs
, err
);
2035 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2036 vs
->offset
+= vs
->count
;
2040 complete_pdu(s
, vs
->pdu
, err
);
2044 static void v9fs_xattr_read(V9fsState
*s
, V9fsReadState
*vs
)
2050 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2051 read_count
= xattr_len
- vs
->off
;
2052 if (read_count
> vs
->count
) {
2053 read_count
= vs
->count
;
2054 } else if (read_count
< 0) {
2056 * read beyond XATTR value
2060 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", read_count
);
2061 vs
->offset
+= pdu_pack(vs
->pdu
, vs
->offset
,
2062 ((char *)vs
->fidp
->fs
.xattr
.value
) + vs
->off
,
2065 complete_pdu(s
, vs
->pdu
, err
);
2069 static void v9fs_read(void *opaque
)
2071 V9fsPDU
*pdu
= opaque
;
2072 V9fsState
*s
= pdu
->s
;
2077 vs
= qemu_malloc(sizeof(*vs
));
2084 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
2086 vs
->fidp
= lookup_fid(s
, fid
);
2087 if (vs
->fidp
== NULL
) {
2092 if (vs
->fidp
->fid_type
== P9_FID_DIR
) {
2093 vs
->max_count
= vs
->count
;
2096 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
2098 v9fs_read_post_rewinddir(s
, vs
, err
);
2100 } else if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2102 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
2103 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2104 if (vs
->total
<= vs
->count
) {
2105 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2111 v9fs_read_post_preadv(s
, vs
, err
);
2114 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2115 v9fs_xattr_read(s
, vs
);
2121 complete_pdu(s
, pdu
, err
);
2125 static size_t v9fs_readdir_data_size(V9fsString
*name
)
2128 * Size of each dirent on the wire: size of qid (13) + size of offset (8)
2129 * size of type (1) + size of name.size (2) + strlen(name.data)
2131 return 24 + v9fs_string_size(name
);
2134 static int v9fs_do_readdir(V9fsState
*s
, V9fsPDU
*pdu
,
2135 V9fsFidState
*fidp
, int32_t max_count
)
2142 off_t saved_dir_pos
;
2143 struct dirent
*dent
;
2145 /* save the directory position */
2146 saved_dir_pos
= v9fs_co_telldir(s
, fidp
);
2147 if (saved_dir_pos
< 0) {
2148 return saved_dir_pos
;
2151 err
= v9fs_co_readdir(s
, fidp
, &dent
);
2155 v9fs_string_init(&name
);
2156 v9fs_string_sprintf(&name
, "%s", dent
->d_name
);
2157 if ((count
+ v9fs_readdir_data_size(&name
)) > max_count
) {
2158 /* Ran out of buffer. Set dir back to old position and return */
2159 v9fs_co_seekdir(s
, fidp
, saved_dir_pos
);
2160 v9fs_string_free(&name
);
2164 * Fill up just the path field of qid because the client uses
2165 * only that. To fill the entire qid structure we will have
2166 * to stat each dirent found, which is expensive
2168 size
= MIN(sizeof(dent
->d_ino
), sizeof(qid
.path
));
2169 memcpy(&qid
.path
, &dent
->d_ino
, size
);
2170 /* Fill the other fields with dummy values */
2174 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
2175 len
= pdu_marshal(pdu
, 11 + count
, "Qqbs",
2177 dent
->d_type
, &name
);
2179 v9fs_string_free(&name
);
2180 saved_dir_pos
= dent
->d_off
;
2188 static void v9fs_readdir(void *opaque
)
2194 int64_t initial_offset
;
2195 int32_t count
, max_count
;
2196 V9fsPDU
*pdu
= opaque
;
2197 V9fsState
*s
= pdu
->s
;
2199 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &initial_offset
, &max_count
);
2201 fidp
= lookup_fid(s
, fid
);
2202 if (fidp
== NULL
|| !fidp
->fs
.dir
) {
2206 if (initial_offset
== 0) {
2207 v9fs_co_rewinddir(s
, fidp
);
2209 v9fs_co_seekdir(s
, fidp
, initial_offset
);
2211 count
= v9fs_do_readdir(s
, pdu
, fidp
, max_count
);
2217 retval
+= pdu_marshal(pdu
, offset
, "d", count
);
2220 complete_pdu(s
, pdu
, retval
);
2223 static void v9fs_write_post_pwritev(V9fsState
*s
, V9fsWriteState
*vs
,
2227 /* IO error return the error */
2231 vs
->total
+= vs
->len
;
2232 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2233 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2236 print_sg(vs
->sg
, vs
->cnt
);
2238 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2243 } while (vs
->len
== -1 && errno
== EINTR
);
2244 if (vs
->len
== -1) {
2247 v9fs_write_post_pwritev(s
, vs
, err
);
2250 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2253 complete_pdu(s
, vs
->pdu
, err
);
2257 static void v9fs_xattr_write(V9fsState
*s
, V9fsWriteState
*vs
)
2264 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2265 write_count
= xattr_len
- vs
->off
;
2266 if (write_count
> vs
->count
) {
2267 write_count
= vs
->count
;
2268 } else if (write_count
< 0) {
2270 * write beyond XATTR value len specified in
2276 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", write_count
);
2278 vs
->fidp
->fs
.xattr
.copied_len
+= write_count
;
2280 * Now copy the content from sg list
2282 for (i
= 0; i
< vs
->cnt
; i
++) {
2283 if (write_count
> vs
->sg
[i
].iov_len
) {
2284 to_copy
= vs
->sg
[i
].iov_len
;
2286 to_copy
= write_count
;
2288 memcpy((char *)vs
->fidp
->fs
.xattr
.value
+ vs
->off
,
2289 vs
->sg
[i
].iov_base
, to_copy
);
2290 /* updating vs->off since we are not using below */
2292 write_count
-= to_copy
;
2295 complete_pdu(s
, vs
->pdu
, err
);
2299 static void v9fs_write(void *opaque
)
2301 V9fsPDU
*pdu
= opaque
;
2302 V9fsState
*s
= pdu
->s
;
2307 vs
= qemu_malloc(sizeof(*vs
));
2315 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2318 vs
->fidp
= lookup_fid(s
, fid
);
2319 if (vs
->fidp
== NULL
) {
2324 if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2325 if (vs
->fidp
->fs
.fd
== -1) {
2329 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2331 * setxattr operation
2333 v9fs_xattr_write(s
, vs
);
2339 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2340 if (vs
->total
<= vs
->count
) {
2341 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
, vs
->off
);
2346 v9fs_write_post_pwritev(s
, vs
, err
);
2350 complete_pdu(s
, vs
->pdu
, err
);
2354 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2357 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2358 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2360 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2363 complete_pdu(s
, vs
->pdu
, err
);
2364 v9fs_string_free(&vs
->name
);
2365 v9fs_string_free(&vs
->extension
);
2366 v9fs_string_free(&vs
->fullname
);
2370 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2373 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2374 v9fs_create_post_getiounit(s
, vs
);
2378 complete_pdu(s
, vs
->pdu
, err
);
2379 v9fs_string_free(&vs
->name
);
2380 v9fs_string_free(&vs
->extension
);
2381 v9fs_string_free(&vs
->fullname
);
2385 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2390 v9fs_post_create(s
, vs
, err
);
2393 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2396 if (!vs
->fidp
->fs
.dir
) {
2399 vs
->fidp
->fid_type
= P9_FID_DIR
;
2400 v9fs_post_create(s
, vs
, err
);
2403 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2411 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2412 v9fs_create_post_opendir(s
, vs
, err
);
2416 v9fs_post_create(s
, vs
, err
);
2419 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2426 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2427 v9fs_create_post_dir_lstat(s
, vs
, err
);
2431 v9fs_post_create(s
, vs
, err
);
2434 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2437 vs
->fidp
->fid_type
= P9_FID_NONE
;
2438 close(vs
->fidp
->fs
.fd
);
2441 v9fs_post_create(s
, vs
, err
);
2445 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2447 if (vs
->fidp
->fs
.fd
== -1) {
2451 vs
->fidp
->fid_type
= P9_FID_FILE
;
2452 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
2453 v9fs_create_post_fstat(s
, vs
, err
);
2458 v9fs_post_create(s
, vs
, err
);
2462 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2465 if (err
== 0 || errno
!= ENOENT
) {
2470 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2471 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, vs
->perm
& 0777,
2473 v9fs_create_post_mkdir(s
, vs
, err
);
2474 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2475 err
= v9fs_do_symlink(s
, vs
->fidp
, vs
->extension
.data
,
2476 vs
->fullname
.data
, -1);
2477 v9fs_create_post_perms(s
, vs
, err
);
2478 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2479 int32_t nfid
= atoi(vs
->extension
.data
);
2480 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2481 if (nfidp
== NULL
) {
2483 v9fs_post_create(s
, vs
, err
);
2485 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2486 v9fs_create_post_perms(s
, vs
, err
);
2487 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2489 uint32_t major
, minor
;
2492 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2495 v9fs_post_create(s
, vs
, err
);
2507 v9fs_post_create(s
, vs
, err
);
2510 nmode
|= vs
->perm
& 0777;
2511 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, nmode
,
2512 makedev(major
, minor
), vs
->fidp
->uid
, -1);
2513 v9fs_create_post_perms(s
, vs
, err
);
2514 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2515 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFIFO
| (vs
->perm
& 0777),
2516 0, vs
->fidp
->uid
, -1);
2517 v9fs_post_create(s
, vs
, err
);
2518 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2519 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFSOCK
| (vs
->perm
& 0777),
2520 0, vs
->fidp
->uid
, -1);
2521 v9fs_post_create(s
, vs
, err
);
2523 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
2524 -1, omode_to_uflags(vs
->mode
)|O_CREAT
, vs
->perm
);
2526 v9fs_create_post_open2(s
, vs
, err
);
2532 v9fs_post_create(s
, vs
, err
);
2535 static void v9fs_create(void *opaque
)
2537 V9fsPDU
*pdu
= opaque
;
2538 V9fsState
*s
= pdu
->s
;
2540 V9fsCreateState
*vs
;
2543 vs
= qemu_malloc(sizeof(*vs
));
2547 v9fs_string_init(&vs
->fullname
);
2549 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2550 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2552 vs
->fidp
= lookup_fid(s
, fid
);
2553 if (vs
->fidp
== NULL
) {
2558 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2561 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2562 v9fs_create_post_lstat(s
, vs
, err
);
2566 complete_pdu(s
, vs
->pdu
, err
);
2567 v9fs_string_free(&vs
->name
);
2568 v9fs_string_free(&vs
->extension
);
2572 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2575 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2576 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2581 complete_pdu(s
, vs
->pdu
, err
);
2582 v9fs_string_free(&vs
->name
);
2583 v9fs_string_free(&vs
->symname
);
2584 v9fs_string_free(&vs
->fullname
);
2588 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2594 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2596 v9fs_post_symlink(s
, vs
, err
);
2599 static void v9fs_symlink(void *opaque
)
2601 V9fsPDU
*pdu
= opaque
;
2602 V9fsState
*s
= pdu
->s
;
2604 V9fsSymlinkState
*vs
;
2608 vs
= qemu_malloc(sizeof(*vs
));
2612 v9fs_string_init(&vs
->fullname
);
2614 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2615 &vs
->symname
, &gid
);
2617 vs
->dfidp
= lookup_fid(s
, dfid
);
2618 if (vs
->dfidp
== NULL
) {
2623 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2625 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2626 vs
->fullname
.data
, gid
);
2627 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2631 complete_pdu(s
, vs
->pdu
, err
);
2632 v9fs_string_free(&vs
->name
);
2633 v9fs_string_free(&vs
->symname
);
2637 static void v9fs_flush(void *opaque
)
2639 V9fsPDU
*pdu
= opaque
;
2640 V9fsState
*s
= pdu
->s
;
2641 /* A nop call with no return */
2642 complete_pdu(s
, pdu
, 7);
2646 static void v9fs_link(void *opaque
)
2648 V9fsPDU
*pdu
= opaque
;
2649 V9fsState
*s
= pdu
->s
;
2650 int32_t dfid
, oldfid
;
2651 V9fsFidState
*dfidp
, *oldfidp
;
2652 V9fsString name
, fullname
;
2656 v9fs_string_init(&fullname
);
2658 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2660 dfidp
= lookup_fid(s
, dfid
);
2661 if (dfidp
== NULL
) {
2666 oldfidp
= lookup_fid(s
, oldfid
);
2667 if (oldfidp
== NULL
) {
2672 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2674 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2678 v9fs_string_free(&fullname
);
2681 v9fs_string_free(&name
);
2682 complete_pdu(s
, pdu
, err
);
2685 static void v9fs_remove_post_remove(V9fsState
*s
, V9fsRemoveState
*vs
,
2694 /* For TREMOVE we need to clunk the fid even on failed remove */
2695 free_fid(s
, vs
->fidp
->fid
);
2697 complete_pdu(s
, vs
->pdu
, err
);
2701 static void v9fs_remove(void *opaque
)
2703 V9fsPDU
*pdu
= opaque
;
2704 V9fsState
*s
= pdu
->s
;
2706 V9fsRemoveState
*vs
;
2709 vs
= qemu_malloc(sizeof(*vs
));
2713 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
2715 vs
->fidp
= lookup_fid(s
, fid
);
2716 if (vs
->fidp
== NULL
) {
2721 err
= v9fs_do_remove(s
, &vs
->fidp
->path
);
2722 v9fs_remove_post_remove(s
, vs
, err
);
2726 complete_pdu(s
, pdu
, err
);
2730 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2739 v9fs_stat_free(&vs
->v9stat
);
2740 complete_pdu(s
, vs
->pdu
, err
);
2744 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2749 if (vs
->v9stat
.length
!= -1) {
2750 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2754 v9fs_wstat_post_truncate(s
, vs
, err
);
2758 v9fs_stat_free(&vs
->v9stat
);
2759 complete_pdu(s
, vs
->pdu
, err
);
2763 static int v9fs_complete_rename(V9fsState
*s
, V9fsRenameState
*vs
)
2766 char *old_name
, *new_name
;
2769 if (vs
->newdirfid
!= -1) {
2770 V9fsFidState
*dirfidp
;
2771 dirfidp
= lookup_fid(s
, vs
->newdirfid
);
2773 if (dirfidp
== NULL
) {
2778 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2780 new_name
= qemu_mallocz(dirfidp
->path
.size
+ vs
->name
.size
+ 2);
2782 strcpy(new_name
, dirfidp
->path
.data
);
2783 strcat(new_name
, "/");
2784 strcat(new_name
+ dirfidp
->path
.size
, vs
->name
.data
);
2786 old_name
= vs
->fidp
->path
.data
;
2787 end
= strrchr(old_name
, '/');
2793 new_name
= qemu_mallocz(end
- old_name
+ vs
->name
.size
+ 1);
2795 strncat(new_name
, old_name
, end
- old_name
);
2796 strncat(new_name
+ (end
- old_name
), vs
->name
.data
, vs
->name
.size
);
2799 v9fs_string_free(&vs
->name
);
2800 vs
->name
.data
= qemu_strdup(new_name
);
2801 vs
->name
.size
= strlen(new_name
);
2803 if (strcmp(new_name
, vs
->fidp
->path
.data
) != 0) {
2804 if (v9fs_do_rename(s
, &vs
->fidp
->path
, &vs
->name
)) {
2809 * Fixup fid's pointing to the old name to
2810 * start pointing to the new name
2812 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
2813 if (vs
->fidp
== fidp
) {
2815 * we replace name of this fid towards the end so
2816 * that our below v9fs_path_is_ancestor check will
2821 if (v9fs_path_is_ancestor(&vs
->fidp
->path
, &fidp
->path
)) {
2822 /* replace the name */
2823 v9fs_fix_path(&fidp
->path
, &vs
->name
,
2824 strlen(vs
->fidp
->path
.data
));
2827 v9fs_string_copy(&vs
->fidp
->path
, &vs
->name
);
2831 v9fs_string_free(&vs
->name
);
2835 static void v9fs_rename_post_rename(V9fsState
*s
, V9fsRenameState
*vs
, int err
)
2837 complete_pdu(s
, vs
->pdu
, err
);
2841 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2847 if (vs
->v9stat
.name
.size
!= 0) {
2848 V9fsRenameState
*vr
;
2850 vr
= qemu_mallocz(sizeof(V9fsRenameState
));
2853 vr
->fidp
= vs
->fidp
;
2854 vr
->offset
= vs
->offset
;
2855 vr
->name
.size
= vs
->v9stat
.name
.size
;
2856 vr
->name
.data
= qemu_strdup(vs
->v9stat
.name
.data
);
2858 err
= v9fs_complete_rename(s
, vr
);
2861 v9fs_wstat_post_rename(s
, vs
, err
);
2865 v9fs_stat_free(&vs
->v9stat
);
2866 complete_pdu(s
, vs
->pdu
, err
);
2870 static void v9fs_rename(void *opaque
)
2872 V9fsPDU
*pdu
= opaque
;
2873 V9fsState
*s
= pdu
->s
;
2875 V9fsRenameState
*vs
;
2878 vs
= qemu_malloc(sizeof(*vs
));
2882 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dds", &fid
, &vs
->newdirfid
, &vs
->name
);
2884 vs
->fidp
= lookup_fid(s
, fid
);
2885 if (vs
->fidp
== NULL
) {
2890 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
2892 err
= v9fs_complete_rename(s
, vs
);
2893 v9fs_rename_post_rename(s
, vs
, err
);
2896 complete_pdu(s
, vs
->pdu
, err
);
2900 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2906 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2907 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2908 vs
->v9stat
.n_gid
)) {
2912 v9fs_wstat_post_chown(s
, vs
, err
);
2916 v9fs_stat_free(&vs
->v9stat
);
2917 complete_pdu(s
, vs
->pdu
, err
);
2921 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2927 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2928 struct timespec times
[2];
2929 if (vs
->v9stat
.atime
!= -1) {
2930 times
[0].tv_sec
= vs
->v9stat
.atime
;
2931 times
[0].tv_nsec
= 0;
2933 times
[0].tv_nsec
= UTIME_OMIT
;
2935 if (vs
->v9stat
.mtime
!= -1) {
2936 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2937 times
[1].tv_nsec
= 0;
2939 times
[1].tv_nsec
= UTIME_OMIT
;
2942 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2947 v9fs_wstat_post_utime(s
, vs
, err
);
2951 v9fs_stat_free(&vs
->v9stat
);
2952 complete_pdu(s
, vs
->pdu
, err
);
2956 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2961 v9fs_stat_free(&vs
->v9stat
);
2962 complete_pdu(s
, vs
->pdu
, err
);
2966 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2975 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2977 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2978 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2979 /* Attempting to change the type */
2984 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2985 &vs
->v9stat
.extension
))) {
2988 v9fs_wstat_post_chmod(s
, vs
, err
);
2992 v9fs_stat_free(&vs
->v9stat
);
2993 complete_pdu(s
, vs
->pdu
, err
);
2997 static void v9fs_wstat(void *opaque
)
2999 V9fsPDU
*pdu
= opaque
;
3000 V9fsState
*s
= pdu
->s
;
3005 vs
= qemu_malloc(sizeof(*vs
));
3009 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
3011 vs
->fidp
= lookup_fid(s
, fid
);
3012 if (vs
->fidp
== NULL
) {
3017 /* do we need to sync the file? */
3018 if (donttouch_stat(&vs
->v9stat
)) {
3019 err
= v9fs_do_fsync(s
, vs
->fidp
->fs
.fd
, 0);
3020 v9fs_wstat_post_fsync(s
, vs
, err
);
3024 if (vs
->v9stat
.mode
!= -1) {
3025 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
3026 v9fs_wstat_post_lstat(s
, vs
, err
);
3030 v9fs_wstat_post_chmod(s
, vs
, err
);
3034 v9fs_stat_free(&vs
->v9stat
);
3035 complete_pdu(s
, vs
->pdu
, err
);
3039 static int v9fs_fill_statfs(V9fsState
*s
, V9fsPDU
*pdu
, struct statfs
*stbuf
)
3051 int32_t bsize_factor
;
3054 * compute bsize factor based on host file system block size
3057 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/stbuf
->f_bsize
;
3058 if (!bsize_factor
) {
3061 f_type
= stbuf
->f_type
;
3062 f_bsize
= stbuf
->f_bsize
;
3063 f_bsize
*= bsize_factor
;
3065 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
3066 * adjust(divide) the number of blocks, free blocks and available
3067 * blocks by bsize factor
3069 f_blocks
= stbuf
->f_blocks
/bsize_factor
;
3070 f_bfree
= stbuf
->f_bfree
/bsize_factor
;
3071 f_bavail
= stbuf
->f_bavail
/bsize_factor
;
3072 f_files
= stbuf
->f_files
;
3073 f_ffree
= stbuf
->f_ffree
;
3074 fsid_val
= (unsigned int) stbuf
->f_fsid
.__val
[0] |
3075 (unsigned long long)stbuf
->f_fsid
.__val
[1] << 32;
3076 f_namelen
= stbuf
->f_namelen
;
3078 return pdu_marshal(pdu
, offset
, "ddqqqqqqd",
3079 f_type
, f_bsize
, f_blocks
, f_bfree
,
3080 f_bavail
, f_files
, f_ffree
,
3081 fsid_val
, f_namelen
);
3084 static void v9fs_statfs(void *opaque
)
3090 struct statfs stbuf
;
3091 V9fsPDU
*pdu
= opaque
;
3092 V9fsState
*s
= pdu
->s
;
3094 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3095 fidp
= lookup_fid(s
, fid
);
3100 retval
= v9fs_co_statfs(s
, &fidp
->path
, &stbuf
);
3105 retval
+= v9fs_fill_statfs(s
, pdu
, &stbuf
);
3107 complete_pdu(s
, pdu
, retval
);
3111 static void v9fs_mknod_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3118 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3119 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3122 complete_pdu(s
, vs
->pdu
, err
);
3123 v9fs_string_free(&vs
->fullname
);
3124 v9fs_string_free(&vs
->name
);
3128 static void v9fs_mknod_post_mknod(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3135 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3136 v9fs_mknod_post_lstat(s
, vs
, err
);
3139 complete_pdu(s
, vs
->pdu
, err
);
3140 v9fs_string_free(&vs
->fullname
);
3141 v9fs_string_free(&vs
->name
);
3145 static void v9fs_mknod(void *opaque
)
3147 V9fsPDU
*pdu
= opaque
;
3148 V9fsState
*s
= pdu
->s
;
3157 vs
= qemu_malloc(sizeof(*vs
));
3161 v9fs_string_init(&vs
->fullname
);
3162 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdddd", &fid
, &vs
->name
, &mode
,
3163 &major
, &minor
, &gid
);
3165 fidp
= lookup_fid(s
, fid
);
3171 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3172 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, mode
, makedev(major
, minor
),
3174 v9fs_mknod_post_mknod(s
, vs
, err
);
3178 complete_pdu(s
, vs
->pdu
, err
);
3179 v9fs_string_free(&vs
->fullname
);
3180 v9fs_string_free(&vs
->name
);
3185 * Implement posix byte range locking code
3186 * Server side handling of locking code is very simple, because 9p server in
3187 * QEMU can handle only one client. And most of the lock handling
3188 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
3189 * do any thing in * qemu 9p server side lock code path.
3190 * So when a TLOCK request comes, always return success
3193 static void v9fs_lock(void *opaque
)
3195 V9fsPDU
*pdu
= opaque
;
3196 V9fsState
*s
= pdu
->s
;
3197 int32_t fid
, err
= 0;
3200 vs
= qemu_mallocz(sizeof(*vs
));
3204 vs
->flock
= qemu_malloc(sizeof(*vs
->flock
));
3205 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dbdqqds", &fid
, &vs
->flock
->type
,
3206 &vs
->flock
->flags
, &vs
->flock
->start
, &vs
->flock
->length
,
3207 &vs
->flock
->proc_id
, &vs
->flock
->client_id
);
3209 vs
->status
= P9_LOCK_ERROR
;
3211 /* We support only block flag now (that too ignored currently) */
3212 if (vs
->flock
->flags
& ~P9_LOCK_FLAGS_BLOCK
) {
3216 vs
->fidp
= lookup_fid(s
, fid
);
3217 if (vs
->fidp
== NULL
) {
3222 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
3227 vs
->status
= P9_LOCK_SUCCESS
;
3229 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "b", vs
->status
);
3230 complete_pdu(s
, vs
->pdu
, err
);
3231 qemu_free(vs
->flock
);
3236 * When a TGETLOCK request comes, always return success because all lock
3237 * handling is done by client's VFS layer.
3240 static void v9fs_getlock(void *opaque
)
3242 V9fsPDU
*pdu
= opaque
;
3243 V9fsState
*s
= pdu
->s
;
3244 int32_t fid
, err
= 0;
3245 V9fsGetlockState
*vs
;
3247 vs
= qemu_mallocz(sizeof(*vs
));
3251 vs
->glock
= qemu_malloc(sizeof(*vs
->glock
));
3252 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dbqqds", &fid
, &vs
->glock
->type
,
3253 &vs
->glock
->start
, &vs
->glock
->length
, &vs
->glock
->proc_id
,
3254 &vs
->glock
->client_id
);
3256 vs
->fidp
= lookup_fid(s
, fid
);
3257 if (vs
->fidp
== NULL
) {
3262 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
3267 vs
->glock
->type
= F_UNLCK
;
3268 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "bqqds", vs
->glock
->type
,
3269 vs
->glock
->start
, vs
->glock
->length
, vs
->glock
->proc_id
,
3270 &vs
->glock
->client_id
);
3272 complete_pdu(s
, vs
->pdu
, err
);
3273 qemu_free(vs
->glock
);
3277 static void v9fs_mkdir_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3284 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3285 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3288 complete_pdu(s
, vs
->pdu
, err
);
3289 v9fs_string_free(&vs
->fullname
);
3290 v9fs_string_free(&vs
->name
);
3294 static void v9fs_mkdir_post_mkdir(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3301 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3302 v9fs_mkdir_post_lstat(s
, vs
, err
);
3305 complete_pdu(s
, vs
->pdu
, err
);
3306 v9fs_string_free(&vs
->fullname
);
3307 v9fs_string_free(&vs
->name
);
3311 static void v9fs_mkdir(void *opaque
)
3313 V9fsPDU
*pdu
= opaque
;
3314 V9fsState
*s
= pdu
->s
;
3322 vs
= qemu_malloc(sizeof(*vs
));
3326 v9fs_string_init(&vs
->fullname
);
3327 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdd", &fid
, &vs
->name
, &mode
,
3330 fidp
= lookup_fid(s
, fid
);
3336 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3337 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, mode
, fidp
->uid
, gid
);
3338 v9fs_mkdir_post_mkdir(s
, vs
, err
);
3342 complete_pdu(s
, vs
->pdu
, err
);
3343 v9fs_string_free(&vs
->fullname
);
3344 v9fs_string_free(&vs
->name
);
3348 static void v9fs_post_xattr_getvalue(V9fsState
*s
, V9fsXattrState
*vs
, int err
)
3353 free_fid(s
, vs
->xattr_fidp
->fid
);
3356 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "q", vs
->size
);
3359 complete_pdu(s
, vs
->pdu
, err
);
3360 v9fs_string_free(&vs
->name
);
3365 static void v9fs_post_xattr_check(V9fsState
*s
, V9fsXattrState
*vs
, ssize_t err
)
3369 free_fid(s
, vs
->xattr_fidp
->fid
);
3373 * Read the xattr value
3375 vs
->xattr_fidp
->fs
.xattr
.len
= vs
->size
;
3376 vs
->xattr_fidp
->fid_type
= P9_FID_XATTR
;
3377 vs
->xattr_fidp
->fs
.xattr
.copied_len
= -1;
3379 vs
->xattr_fidp
->fs
.xattr
.value
= qemu_malloc(vs
->size
);
3380 err
= v9fs_do_lgetxattr(s
, &vs
->xattr_fidp
->path
,
3381 &vs
->name
, vs
->xattr_fidp
->fs
.xattr
.value
,
3382 vs
->xattr_fidp
->fs
.xattr
.len
);
3384 v9fs_post_xattr_getvalue(s
, vs
, err
);
3387 complete_pdu(s
, vs
->pdu
, err
);
3388 v9fs_string_free(&vs
->name
);
3392 static void v9fs_post_lxattr_getvalue(V9fsState
*s
,
3393 V9fsXattrState
*vs
, int err
)
3397 free_fid(s
, vs
->xattr_fidp
->fid
);
3400 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "q", vs
->size
);
3403 complete_pdu(s
, vs
->pdu
, err
);
3404 v9fs_string_free(&vs
->name
);
3409 static void v9fs_post_lxattr_check(V9fsState
*s
,
3410 V9fsXattrState
*vs
, ssize_t err
)
3414 free_fid(s
, vs
->xattr_fidp
->fid
);
3418 * Read the xattr value
3420 vs
->xattr_fidp
->fs
.xattr
.len
= vs
->size
;
3421 vs
->xattr_fidp
->fid_type
= P9_FID_XATTR
;
3422 vs
->xattr_fidp
->fs
.xattr
.copied_len
= -1;
3424 vs
->xattr_fidp
->fs
.xattr
.value
= qemu_malloc(vs
->size
);
3425 err
= v9fs_do_llistxattr(s
, &vs
->xattr_fidp
->path
,
3426 vs
->xattr_fidp
->fs
.xattr
.value
,
3427 vs
->xattr_fidp
->fs
.xattr
.len
);
3429 v9fs_post_lxattr_getvalue(s
, vs
, err
);
3432 complete_pdu(s
, vs
->pdu
, err
);
3433 v9fs_string_free(&vs
->name
);
3437 static void v9fs_xattrwalk(void *opaque
)
3439 V9fsPDU
*pdu
= opaque
;
3440 V9fsState
*s
= pdu
->s
;
3443 int32_t fid
, newfid
;
3445 vs
= qemu_malloc(sizeof(*vs
));
3449 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dds", &fid
, &newfid
, &vs
->name
);
3450 vs
->file_fidp
= lookup_fid(s
, fid
);
3451 if (vs
->file_fidp
== NULL
) {
3456 vs
->xattr_fidp
= alloc_fid(s
, newfid
);
3457 if (vs
->xattr_fidp
== NULL
) {
3462 v9fs_string_copy(&vs
->xattr_fidp
->path
, &vs
->file_fidp
->path
);
3463 if (vs
->name
.data
[0] == 0) {
3465 * listxattr request. Get the size first
3467 vs
->size
= v9fs_do_llistxattr(s
, &vs
->xattr_fidp
->path
,
3472 v9fs_post_lxattr_check(s
, vs
, err
);
3476 * specific xattr fid. We check for xattr
3477 * presence also collect the xattr size
3479 vs
->size
= v9fs_do_lgetxattr(s
, &vs
->xattr_fidp
->path
,
3480 &vs
->name
, NULL
, 0);
3484 v9fs_post_xattr_check(s
, vs
, err
);
3488 complete_pdu(s
, vs
->pdu
, err
);
3489 v9fs_string_free(&vs
->name
);
3493 static void v9fs_xattrcreate(void *opaque
)
3495 V9fsPDU
*pdu
= opaque
;
3496 V9fsState
*s
= pdu
->s
;
3502 vs
= qemu_malloc(sizeof(*vs
));
3506 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsqd",
3507 &fid
, &vs
->name
, &vs
->size
, &flags
);
3509 vs
->file_fidp
= lookup_fid(s
, fid
);
3510 if (vs
->file_fidp
== NULL
) {
3515 /* Make the file fid point to xattr */
3516 vs
->xattr_fidp
= vs
->file_fidp
;
3517 vs
->xattr_fidp
->fid_type
= P9_FID_XATTR
;
3518 vs
->xattr_fidp
->fs
.xattr
.copied_len
= 0;
3519 vs
->xattr_fidp
->fs
.xattr
.len
= vs
->size
;
3520 vs
->xattr_fidp
->fs
.xattr
.flags
= flags
;
3521 v9fs_string_init(&vs
->xattr_fidp
->fs
.xattr
.name
);
3522 v9fs_string_copy(&vs
->xattr_fidp
->fs
.xattr
.name
, &vs
->name
);
3524 vs
->xattr_fidp
->fs
.xattr
.value
= qemu_malloc(vs
->size
);
3526 vs
->xattr_fidp
->fs
.xattr
.value
= NULL
;
3529 complete_pdu(s
, vs
->pdu
, err
);
3530 v9fs_string_free(&vs
->name
);
3534 static void v9fs_readlink(void *opaque
)
3536 V9fsPDU
*pdu
= opaque
;
3543 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3544 fidp
= lookup_fid(pdu
->s
, fid
);
3550 v9fs_string_init(&target
);
3551 err
= v9fs_co_readlink(pdu
->s
, &fidp
->path
, &target
);
3555 offset
+= pdu_marshal(pdu
, offset
, "s", &target
);
3557 v9fs_string_free(&target
);
3559 complete_pdu(pdu
->s
, pdu
, err
);
3562 static CoroutineEntry
*pdu_co_handlers
[] = {
3563 [P9_TREADDIR
] = v9fs_readdir
,
3564 [P9_TSTATFS
] = v9fs_statfs
,
3565 [P9_TGETATTR
] = v9fs_getattr
,
3566 [P9_TSETATTR
] = v9fs_setattr
,
3567 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
3568 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
3569 [P9_TMKNOD
] = v9fs_mknod
,
3570 [P9_TRENAME
] = v9fs_rename
,
3571 [P9_TLOCK
] = v9fs_lock
,
3572 [P9_TGETLOCK
] = v9fs_getlock
,
3573 [P9_TREADLINK
] = v9fs_readlink
,
3574 [P9_TMKDIR
] = v9fs_mkdir
,
3575 [P9_TVERSION
] = v9fs_version
,
3576 [P9_TLOPEN
] = v9fs_open
,
3577 [P9_TATTACH
] = v9fs_attach
,
3578 [P9_TSTAT
] = v9fs_stat
,
3579 [P9_TWALK
] = v9fs_walk
,
3580 [P9_TCLUNK
] = v9fs_clunk
,
3581 [P9_TFSYNC
] = v9fs_fsync
,
3582 [P9_TOPEN
] = v9fs_open
,
3583 [P9_TREAD
] = v9fs_read
,
3585 [P9_TAUTH
] = v9fs_auth
,
3587 [P9_TFLUSH
] = v9fs_flush
,
3588 [P9_TLINK
] = v9fs_link
,
3589 [P9_TSYMLINK
] = v9fs_symlink
,
3590 [P9_TCREATE
] = v9fs_create
,
3591 [P9_TLCREATE
] = v9fs_lcreate
,
3592 [P9_TWRITE
] = v9fs_write
,
3593 [P9_TWSTAT
] = v9fs_wstat
,
3594 [P9_TREMOVE
] = v9fs_remove
,
3597 static void v9fs_op_not_supp(void *opaque
)
3599 V9fsPDU
*pdu
= opaque
;
3600 complete_pdu(pdu
->s
, pdu
, -EOPNOTSUPP
);
3603 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3606 CoroutineEntry
*handler
;
3611 if (pdu
->id
>= ARRAY_SIZE(pdu_co_handlers
) ||
3612 (pdu_co_handlers
[pdu
->id
] == NULL
)) {
3613 handler
= v9fs_op_not_supp
;
3615 handler
= pdu_co_handlers
[pdu
->id
];
3617 co
= qemu_coroutine_create(handler
);
3618 qemu_coroutine_enter(co
, pdu
);
3621 void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3623 V9fsState
*s
= (V9fsState
*)vdev
;
3627 while ((pdu
= alloc_pdu(s
)) &&
3628 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3631 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3632 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3634 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3636 memcpy(&pdu
->size
, ptr
, 4);
3638 memcpy(&pdu
->tag
, ptr
+ 5, 2);