]>
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_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 int v9fs_do_lsetxattr(V9fsState
*s
, V9fsString
*path
,
243 V9fsString
*xattr_name
,
244 void *value
, size_t size
, int flags
)
246 return s
->ops
->lsetxattr(&s
->ctx
, path
->data
,
247 xattr_name
->data
, value
, size
, flags
);
250 static int v9fs_do_lremovexattr(V9fsState
*s
, V9fsString
*path
,
251 V9fsString
*xattr_name
)
253 return s
->ops
->lremovexattr(&s
->ctx
, path
->data
,
258 static void v9fs_string_init(V9fsString
*str
)
264 static void v9fs_string_free(V9fsString
*str
)
266 qemu_free(str
->data
);
271 static void v9fs_string_null(V9fsString
*str
)
273 v9fs_string_free(str
);
276 static int number_to_string(void *arg
, char type
)
278 unsigned int ret
= 0;
282 unsigned int num
= *(unsigned int *)arg
;
291 unsigned long num
= *(unsigned long *)arg
;
299 printf("Number_to_string: Unknown number format\n");
306 static int GCC_FMT_ATTR(2, 0)
307 v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
310 char *iter
= (char *)fmt
;
314 unsigned int arg_uint
;
315 unsigned long arg_ulong
;
317 /* Find the number of %'s that denotes an argument */
318 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
323 len
= strlen(fmt
) - 2*nr_args
;
333 /* Now parse the format string */
334 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
338 arg_uint
= va_arg(ap2
, unsigned int);
339 len
+= number_to_string((void *)&arg_uint
, 'u');
342 if (*++iter
== 'u') {
343 arg_ulong
= va_arg(ap2
, unsigned long);
344 len
+= number_to_string((void *)&arg_ulong
, 'U');
350 arg_char_ptr
= va_arg(ap2
, char *);
351 len
+= strlen(arg_char_ptr
);
358 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
365 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
367 return vsprintf(*strp
, fmt
, ap
);
370 static void GCC_FMT_ATTR(2, 3)
371 v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
376 v9fs_string_free(str
);
379 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
386 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
388 v9fs_string_free(lhs
);
389 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
393 * Return TRUE if s1 is an ancestor of s2.
395 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
396 * As a special case, We treat s1 as ancestor of s2 if they are same!
398 static int v9fs_path_is_ancestor(V9fsString
*s1
, V9fsString
*s2
)
400 if (!strncmp(s1
->data
, s2
->data
, s1
->size
)) {
401 if (s2
->data
[s1
->size
] == '\0' || s2
->data
[s1
->size
] == '/') {
408 static size_t v9fs_string_size(V9fsString
*str
)
413 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
417 for (f
= s
->fid_list
; f
; f
= f
->next
) {
426 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
430 f
= lookup_fid(s
, fid
);
435 f
= qemu_mallocz(sizeof(V9fsFidState
));
438 f
->fid_type
= P9_FID_NONE
;
440 f
->next
= s
->fid_list
;
446 static int v9fs_xattr_fid_clunk(V9fsState
*s
, V9fsFidState
*fidp
)
450 if (fidp
->fs
.xattr
.copied_len
== -1) {
451 /* getxattr/listxattr fid */
455 * if this is fid for setxattr. clunk should
456 * result in setxattr localcall
458 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
459 /* clunk after partial write */
463 if (fidp
->fs
.xattr
.len
) {
464 retval
= v9fs_do_lsetxattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
465 fidp
->fs
.xattr
.value
,
467 fidp
->fs
.xattr
.flags
);
469 retval
= v9fs_do_lremovexattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
);
472 v9fs_string_free(&fidp
->fs
.xattr
.name
);
474 if (fidp
->fs
.xattr
.value
) {
475 qemu_free(fidp
->fs
.xattr
.value
);
480 static int free_fid(V9fsState
*s
, int32_t fid
)
483 V9fsFidState
**fidpp
, *fidp
;
485 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
486 if ((*fidpp
)->fid
== fid
) {
491 if (*fidpp
== NULL
) {
498 if (fidp
->fid_type
== P9_FID_FILE
) {
499 v9fs_do_close(s
, fidp
->fs
.fd
);
500 } else if (fidp
->fid_type
== P9_FID_DIR
) {
501 v9fs_do_closedir(s
, fidp
->fs
.dir
);
502 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
503 retval
= v9fs_xattr_fid_clunk(s
, fidp
);
505 v9fs_string_free(&fidp
->path
);
511 #define P9_QID_TYPE_DIR 0x80
512 #define P9_QID_TYPE_SYMLINK 0x02
514 #define P9_STAT_MODE_DIR 0x80000000
515 #define P9_STAT_MODE_APPEND 0x40000000
516 #define P9_STAT_MODE_EXCL 0x20000000
517 #define P9_STAT_MODE_MOUNT 0x10000000
518 #define P9_STAT_MODE_AUTH 0x08000000
519 #define P9_STAT_MODE_TMP 0x04000000
520 #define P9_STAT_MODE_SYMLINK 0x02000000
521 #define P9_STAT_MODE_LINK 0x01000000
522 #define P9_STAT_MODE_DEVICE 0x00800000
523 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
524 #define P9_STAT_MODE_SOCKET 0x00100000
525 #define P9_STAT_MODE_SETUID 0x00080000
526 #define P9_STAT_MODE_SETGID 0x00040000
527 #define P9_STAT_MODE_SETVTX 0x00010000
529 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
530 P9_STAT_MODE_SYMLINK | \
531 P9_STAT_MODE_LINK | \
532 P9_STAT_MODE_DEVICE | \
533 P9_STAT_MODE_NAMED_PIPE | \
536 /* This is the algorithm from ufs in spfs */
537 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
541 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
542 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
543 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
545 if (S_ISDIR(stbuf
->st_mode
)) {
546 qidp
->type
|= P9_QID_TYPE_DIR
;
548 if (S_ISLNK(stbuf
->st_mode
)) {
549 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
553 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
558 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
563 stat_to_qid(&stbuf
, qidp
);
567 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
571 if (!QLIST_EMPTY(&s
->free_list
)) {
572 pdu
= QLIST_FIRST(&s
->free_list
);
573 QLIST_REMOVE(pdu
, next
);
578 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
584 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
588 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
589 size_t offset
, size_t size
, int pack
)
594 for (i
= 0; size
&& i
< sg_count
; i
++) {
596 if (offset
>= sg
[i
].iov_len
) {
598 offset
-= sg
[i
].iov_len
;
601 len
= MIN(sg
[i
].iov_len
- offset
, size
);
603 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
605 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
620 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
622 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
626 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
629 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
633 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
637 struct iovec
*src_sg
;
641 src_sg
= pdu
->elem
.in_sg
;
642 num
= pdu
->elem
.in_num
;
644 src_sg
= pdu
->elem
.out_sg
;
645 num
= pdu
->elem
.out_num
;
649 for (i
= 0; i
< num
; i
++) {
651 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
652 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
654 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
655 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
656 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
657 sg
[j
].iov_base
+= (offset
- pos
);
658 sg
[j
].iov_len
-= (offset
- pos
);
661 pos
+= src_sg
[i
].iov_len
;
667 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
669 size_t old_offset
= offset
;
674 for (i
= 0; fmt
[i
]; i
++) {
677 uint8_t *valp
= va_arg(ap
, uint8_t *);
678 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
683 valp
= va_arg(ap
, uint16_t *);
684 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
685 *valp
= le16_to_cpu(val
);
690 valp
= va_arg(ap
, uint32_t *);
691 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
692 *valp
= le32_to_cpu(val
);
697 valp
= va_arg(ap
, uint64_t *);
698 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
699 *valp
= le64_to_cpu(val
);
703 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
704 int *iovcnt
= va_arg(ap
, int *);
705 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
709 V9fsString
*str
= va_arg(ap
, V9fsString
*);
710 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
711 /* FIXME: sanity check str->size */
712 str
->data
= qemu_malloc(str
->size
+ 1);
713 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
714 str
->data
[str
->size
] = 0;
718 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
719 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
720 &qidp
->type
, &qidp
->version
, &qidp
->path
);
724 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
725 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
726 &statp
->size
, &statp
->type
, &statp
->dev
,
727 &statp
->qid
, &statp
->mode
, &statp
->atime
,
728 &statp
->mtime
, &statp
->length
,
729 &statp
->name
, &statp
->uid
, &statp
->gid
,
730 &statp
->muid
, &statp
->extension
,
731 &statp
->n_uid
, &statp
->n_gid
,
736 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
737 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
738 &iattr
->valid
, &iattr
->mode
,
739 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
740 &iattr
->atime_sec
, &iattr
->atime_nsec
,
741 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
751 return offset
- old_offset
;
754 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
756 size_t old_offset
= offset
;
761 for (i
= 0; fmt
[i
]; i
++) {
764 uint8_t val
= va_arg(ap
, int);
765 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
770 cpu_to_le16w(&val
, va_arg(ap
, int));
771 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
776 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
777 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
782 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
783 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
787 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
788 int *iovcnt
= va_arg(ap
, int *);
789 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
793 V9fsString
*str
= va_arg(ap
, V9fsString
*);
794 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
795 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
799 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
800 offset
+= pdu_marshal(pdu
, offset
, "bdq",
801 qidp
->type
, qidp
->version
, qidp
->path
);
805 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
806 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
807 statp
->size
, statp
->type
, statp
->dev
,
808 &statp
->qid
, statp
->mode
, statp
->atime
,
809 statp
->mtime
, statp
->length
, &statp
->name
,
810 &statp
->uid
, &statp
->gid
, &statp
->muid
,
811 &statp
->extension
, statp
->n_uid
,
812 statp
->n_gid
, statp
->n_muid
);
816 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
817 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
818 statp
->st_result_mask
,
819 &statp
->qid
, statp
->st_mode
,
820 statp
->st_uid
, statp
->st_gid
,
821 statp
->st_nlink
, statp
->st_rdev
,
822 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
823 statp
->st_atime_sec
, statp
->st_atime_nsec
,
824 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
825 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
826 statp
->st_btime_sec
, statp
->st_btime_nsec
,
827 statp
->st_gen
, statp
->st_data_version
);
836 return offset
- old_offset
;
839 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
841 int8_t id
= pdu
->id
+ 1; /* Response */
847 if (s
->proto_version
!= V9FS_PROTO_2000L
) {
850 str
.data
= strerror(err
);
851 str
.size
= strlen(str
.data
);
853 len
+= pdu_marshal(pdu
, len
, "s", &str
);
857 len
+= pdu_marshal(pdu
, len
, "d", err
);
859 if (s
->proto_version
== V9FS_PROTO_2000L
) {
864 /* fill out the header */
865 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
867 /* keep these in sync */
871 /* push onto queue and notify */
872 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
874 /* FIXME: we should batch these completions */
875 virtio_notify(&s
->vdev
, s
->vq
);
880 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
885 if (mode
& P9_STAT_MODE_DIR
) {
889 if (mode
& P9_STAT_MODE_SYMLINK
) {
892 if (mode
& P9_STAT_MODE_SOCKET
) {
895 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
898 if (mode
& P9_STAT_MODE_DEVICE
) {
899 if (extension
&& extension
->data
[0] == 'c') {
910 if (mode
& P9_STAT_MODE_SETUID
) {
913 if (mode
& P9_STAT_MODE_SETGID
) {
916 if (mode
& P9_STAT_MODE_SETVTX
) {
923 static int donttouch_stat(V9fsStat
*stat
)
925 if (stat
->type
== -1 &&
927 stat
->qid
.type
== -1 &&
928 stat
->qid
.version
== -1 &&
929 stat
->qid
.path
== -1 &&
933 stat
->length
== -1 &&
940 stat
->n_muid
== -1) {
947 static void v9fs_stat_free(V9fsStat
*stat
)
949 v9fs_string_free(&stat
->name
);
950 v9fs_string_free(&stat
->uid
);
951 v9fs_string_free(&stat
->gid
);
952 v9fs_string_free(&stat
->muid
);
953 v9fs_string_free(&stat
->extension
);
956 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
960 mode
= stbuf
->st_mode
& 0777;
961 if (S_ISDIR(stbuf
->st_mode
)) {
962 mode
|= P9_STAT_MODE_DIR
;
965 if (S_ISLNK(stbuf
->st_mode
)) {
966 mode
|= P9_STAT_MODE_SYMLINK
;
969 if (S_ISSOCK(stbuf
->st_mode
)) {
970 mode
|= P9_STAT_MODE_SOCKET
;
973 if (S_ISFIFO(stbuf
->st_mode
)) {
974 mode
|= P9_STAT_MODE_NAMED_PIPE
;
977 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
978 mode
|= P9_STAT_MODE_DEVICE
;
981 if (stbuf
->st_mode
& S_ISUID
) {
982 mode
|= P9_STAT_MODE_SETUID
;
985 if (stbuf
->st_mode
& S_ISGID
) {
986 mode
|= P9_STAT_MODE_SETGID
;
989 if (stbuf
->st_mode
& S_ISVTX
) {
990 mode
|= P9_STAT_MODE_SETVTX
;
996 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
997 const struct stat
*stbuf
,
1003 memset(v9stat
, 0, sizeof(*v9stat
));
1005 stat_to_qid(stbuf
, &v9stat
->qid
);
1006 v9stat
->mode
= stat_to_v9mode(stbuf
);
1007 v9stat
->atime
= stbuf
->st_atime
;
1008 v9stat
->mtime
= stbuf
->st_mtime
;
1009 v9stat
->length
= stbuf
->st_size
;
1011 v9fs_string_null(&v9stat
->uid
);
1012 v9fs_string_null(&v9stat
->gid
);
1013 v9fs_string_null(&v9stat
->muid
);
1015 v9stat
->n_uid
= stbuf
->st_uid
;
1016 v9stat
->n_gid
= stbuf
->st_gid
;
1019 v9fs_string_null(&v9stat
->extension
);
1021 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
1022 err
= v9fs_co_readlink(s
, name
, &v9stat
->extension
);
1026 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
1027 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
1028 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
1029 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
1030 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
1031 v9fs_string_sprintf(&v9stat
->extension
, "%s %lu",
1032 "HARDLINKCOUNT", (unsigned long)stbuf
->st_nlink
);
1035 str
= strrchr(name
->data
, '/');
1042 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
1045 v9fs_string_size(&v9stat
->name
) +
1046 v9fs_string_size(&v9stat
->uid
) +
1047 v9fs_string_size(&v9stat
->gid
) +
1048 v9fs_string_size(&v9stat
->muid
) +
1049 v9fs_string_size(&v9stat
->extension
);
1053 #define P9_STATS_MODE 0x00000001ULL
1054 #define P9_STATS_NLINK 0x00000002ULL
1055 #define P9_STATS_UID 0x00000004ULL
1056 #define P9_STATS_GID 0x00000008ULL
1057 #define P9_STATS_RDEV 0x00000010ULL
1058 #define P9_STATS_ATIME 0x00000020ULL
1059 #define P9_STATS_MTIME 0x00000040ULL
1060 #define P9_STATS_CTIME 0x00000080ULL
1061 #define P9_STATS_INO 0x00000100ULL
1062 #define P9_STATS_SIZE 0x00000200ULL
1063 #define P9_STATS_BLOCKS 0x00000400ULL
1065 #define P9_STATS_BTIME 0x00000800ULL
1066 #define P9_STATS_GEN 0x00001000ULL
1067 #define P9_STATS_DATA_VERSION 0x00002000ULL
1069 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1070 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1073 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1074 V9fsStatDotl
*v9lstat
)
1076 memset(v9lstat
, 0, sizeof(*v9lstat
));
1078 v9lstat
->st_mode
= stbuf
->st_mode
;
1079 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1080 v9lstat
->st_uid
= stbuf
->st_uid
;
1081 v9lstat
->st_gid
= stbuf
->st_gid
;
1082 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1083 v9lstat
->st_size
= stbuf
->st_size
;
1084 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1085 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1086 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1087 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1088 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1089 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1090 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1091 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1092 /* Currently we only support BASIC fields in stat */
1093 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1095 stat_to_qid(stbuf
, &v9lstat
->qid
);
1098 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1100 while (len
&& *iovcnt
) {
1101 if (len
< sg
->iov_len
) {
1103 sg
->iov_base
+= len
;
1115 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1120 for (i
= 0; i
< *cnt
; i
++) {
1121 if ((total
+ sg
[i
].iov_len
) > cap
) {
1122 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1126 total
+= sg
[i
].iov_len
;
1134 static void print_sg(struct iovec
*sg
, int cnt
)
1138 printf("sg[%d]: {", cnt
);
1139 for (i
= 0; i
< cnt
; i
++) {
1143 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1148 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1151 v9fs_string_init(&str
);
1152 v9fs_string_copy(&str
, dst
);
1153 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1154 v9fs_string_free(&str
);
1157 static void v9fs_version(void *opaque
)
1159 V9fsPDU
*pdu
= opaque
;
1160 V9fsState
*s
= pdu
->s
;
1164 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1166 if (!strcmp(version
.data
, "9P2000.u")) {
1167 s
->proto_version
= V9FS_PROTO_2000U
;
1168 } else if (!strcmp(version
.data
, "9P2000.L")) {
1169 s
->proto_version
= V9FS_PROTO_2000L
;
1171 v9fs_string_sprintf(&version
, "unknown");
1174 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1175 complete_pdu(s
, pdu
, offset
);
1177 v9fs_string_free(&version
);
1181 static void v9fs_attach(void *opaque
)
1183 V9fsPDU
*pdu
= opaque
;
1184 V9fsState
*s
= pdu
->s
;
1185 int32_t fid
, afid
, n_uname
;
1186 V9fsString uname
, aname
;
1192 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1194 fidp
= alloc_fid(s
, fid
);
1200 fidp
->uid
= n_uname
;
1202 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1203 err
= fid_to_qid(s
, fidp
, &qid
);
1210 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1214 complete_pdu(s
, pdu
, err
);
1215 v9fs_string_free(&uname
);
1216 v9fs_string_free(&aname
);
1219 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1226 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1230 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1234 complete_pdu(s
, vs
->pdu
, err
);
1235 v9fs_stat_free(&vs
->v9stat
);
1239 static void v9fs_stat(void *opaque
)
1241 V9fsPDU
*pdu
= opaque
;
1242 V9fsState
*s
= pdu
->s
;
1247 vs
= qemu_malloc(sizeof(*vs
));
1251 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1253 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1255 vs
->fidp
= lookup_fid(s
, fid
);
1256 if (vs
->fidp
== NULL
) {
1261 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1262 v9fs_stat_post_lstat(s
, vs
, err
);
1266 complete_pdu(s
, vs
->pdu
, err
);
1267 v9fs_stat_free(&vs
->v9stat
);
1271 static void v9fs_getattr(void *opaque
)
1278 uint64_t request_mask
;
1279 V9fsStatDotl v9stat_dotl
;
1280 V9fsPDU
*pdu
= opaque
;
1281 V9fsState
*s
= pdu
->s
;
1283 pdu_unmarshal(pdu
, offset
, "dq", &fid
, &request_mask
);
1285 fidp
= lookup_fid(s
, fid
);
1291 * Currently we only support BASIC fields in stat, so there is no
1292 * need to look at request_mask.
1294 retval
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1298 stat_to_v9stat_dotl(s
, &stbuf
, &v9stat_dotl
);
1300 retval
+= pdu_marshal(pdu
, offset
, "A", &v9stat_dotl
);
1302 complete_pdu(s
, pdu
, retval
);
1305 /* From Linux kernel code */
1306 #define ATTR_MODE (1 << 0)
1307 #define ATTR_UID (1 << 1)
1308 #define ATTR_GID (1 << 2)
1309 #define ATTR_SIZE (1 << 3)
1310 #define ATTR_ATIME (1 << 4)
1311 #define ATTR_MTIME (1 << 5)
1312 #define ATTR_CTIME (1 << 6)
1313 #define ATTR_MASK 127
1314 #define ATTR_ATIME_SET (1 << 7)
1315 #define ATTR_MTIME_SET (1 << 8)
1317 static void v9fs_setattr(void *opaque
)
1324 V9fsPDU
*pdu
= opaque
;
1325 V9fsState
*s
= pdu
->s
;
1327 pdu_unmarshal(pdu
, offset
, "dI", &fid
, &v9iattr
);
1329 fidp
= lookup_fid(s
, fid
);
1334 if (v9iattr
.valid
& ATTR_MODE
) {
1335 err
= v9fs_co_chmod(s
, &fidp
->path
, v9iattr
.mode
);
1340 if (v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1341 struct timespec times
[2];
1342 if (v9iattr
.valid
& ATTR_ATIME
) {
1343 if (v9iattr
.valid
& ATTR_ATIME_SET
) {
1344 times
[0].tv_sec
= v9iattr
.atime_sec
;
1345 times
[0].tv_nsec
= v9iattr
.atime_nsec
;
1347 times
[0].tv_nsec
= UTIME_NOW
;
1350 times
[0].tv_nsec
= UTIME_OMIT
;
1352 if (v9iattr
.valid
& ATTR_MTIME
) {
1353 if (v9iattr
.valid
& ATTR_MTIME_SET
) {
1354 times
[1].tv_sec
= v9iattr
.mtime_sec
;
1355 times
[1].tv_nsec
= v9iattr
.mtime_nsec
;
1357 times
[1].tv_nsec
= UTIME_NOW
;
1360 times
[1].tv_nsec
= UTIME_OMIT
;
1362 err
= v9fs_co_utimensat(s
, &fidp
->path
, times
);
1368 * If the only valid entry in iattr is ctime we can call
1369 * chown(-1,-1) to update the ctime of the file
1371 if ((v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1372 ((v9iattr
.valid
& ATTR_CTIME
)
1373 && !((v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1374 if (!(v9iattr
.valid
& ATTR_UID
)) {
1377 if (!(v9iattr
.valid
& ATTR_GID
)) {
1380 err
= v9fs_co_chown(s
, &fidp
->path
, v9iattr
.uid
,
1386 if (v9iattr
.valid
& (ATTR_SIZE
)) {
1387 err
= v9fs_co_truncate(s
, &fidp
->path
, v9iattr
.size
);
1394 complete_pdu(s
, pdu
, err
);
1397 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1399 complete_pdu(s
, vs
->pdu
, err
);
1401 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1402 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1403 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1406 qemu_free(vs
->wnames
);
1407 qemu_free(vs
->qids
);
1411 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1415 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1417 for (i
= 0; i
< vs
->nwnames
; i
++) {
1418 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1422 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1426 free_fid(s
, vs
->newfidp
->fid
);
1427 v9fs_string_free(&vs
->path
);
1432 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1435 if (vs
->name_idx
< vs
->nwnames
) {
1436 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1437 vs
->wnames
[vs
->name_idx
].data
);
1438 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1440 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1441 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1445 v9fs_string_free(&vs
->path
);
1446 v9fs_walk_marshal(vs
);
1449 v9fs_walk_complete(s
, vs
, err
);
1452 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1456 v9fs_string_free(&vs
->path
);
1461 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1463 if (vs
->name_idx
< vs
->nwnames
) {
1465 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1466 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1467 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1469 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1470 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1474 v9fs_string_free(&vs
->path
);
1475 v9fs_walk_marshal(vs
);
1478 v9fs_walk_complete(s
, vs
, err
);
1481 static void v9fs_walk(void *opaque
)
1483 V9fsPDU
*pdu
= opaque
;
1484 V9fsState
*s
= pdu
->s
;
1485 int32_t fid
, newfid
;
1490 vs
= qemu_malloc(sizeof(*vs
));
1496 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1497 &newfid
, &vs
->nwnames
);
1499 if (vs
->nwnames
&& vs
->nwnames
<= P9_MAXWELEM
) {
1500 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1502 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1504 for (i
= 0; i
< vs
->nwnames
; i
++) {
1505 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1508 } else if (vs
->nwnames
> P9_MAXWELEM
) {
1513 vs
->fidp
= lookup_fid(s
, fid
);
1514 if (vs
->fidp
== NULL
) {
1519 /* FIXME: is this really valid? */
1520 if (fid
== newfid
) {
1522 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1523 v9fs_string_init(&vs
->path
);
1526 if (vs
->name_idx
< vs
->nwnames
) {
1527 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1528 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1529 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1531 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1532 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1536 vs
->newfidp
= alloc_fid(s
, newfid
);
1537 if (vs
->newfidp
== NULL
) {
1542 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1543 v9fs_string_init(&vs
->path
);
1545 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1547 if (vs
->name_idx
< vs
->nwnames
) {
1548 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1549 vs
->wnames
[vs
->name_idx
].data
);
1550 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1552 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1553 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1558 v9fs_walk_marshal(vs
);
1561 v9fs_walk_complete(s
, vs
, err
);
1564 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1566 struct statfs stbuf
;
1570 * iounit should be multiples of f_bsize (host filesystem block size
1571 * and as well as less than (client msize - P9_IOHDRSZ))
1573 if (!v9fs_do_statfs(s
, name
, &stbuf
)) {
1574 iounit
= stbuf
.f_bsize
;
1575 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1579 iounit
= s
->msize
- P9_IOHDRSZ
;
1584 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1586 if (vs
->fidp
->fs
.dir
== NULL
) {
1590 vs
->fidp
->fid_type
= P9_FID_DIR
;
1591 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1594 complete_pdu(s
, vs
->pdu
, err
);
1599 static void v9fs_open_post_getiounit(V9fsState
*s
, V9fsOpenState
*vs
)
1602 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
1604 complete_pdu(s
, vs
->pdu
, err
);
1608 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1610 if (vs
->fidp
->fs
.fd
== -1) {
1614 vs
->fidp
->fid_type
= P9_FID_FILE
;
1615 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
1616 v9fs_open_post_getiounit(s
, vs
);
1619 complete_pdu(s
, vs
->pdu
, err
);
1623 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1632 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1634 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1635 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1636 v9fs_open_post_opendir(s
, vs
, err
);
1638 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1640 flags
&= ~(O_NOCTTY
| O_ASYNC
| O_CREAT
);
1641 /* Ignore direct disk access hint until the server supports it. */
1644 flags
= omode_to_uflags(vs
->mode
);
1646 vs
->fidp
->fs
.fd
= v9fs_do_open(s
, &vs
->fidp
->path
, flags
);
1647 v9fs_open_post_open(s
, vs
, err
);
1651 complete_pdu(s
, vs
->pdu
, err
);
1655 static void v9fs_open(void *opaque
)
1657 V9fsPDU
*pdu
= opaque
;
1658 V9fsState
*s
= pdu
->s
;
1663 vs
= qemu_malloc(sizeof(*vs
));
1668 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1669 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dd", &fid
, &vs
->mode
);
1671 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1674 vs
->fidp
= lookup_fid(s
, fid
);
1675 if (vs
->fidp
== NULL
) {
1680 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1682 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1684 v9fs_open_post_lstat(s
, vs
, err
);
1687 complete_pdu(s
, pdu
, err
);
1691 static void v9fs_post_lcreate(V9fsState
*s
, V9fsLcreateState
*vs
, int err
)
1694 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
1695 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1696 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
,
1700 vs
->fidp
->fid_type
= P9_FID_NONE
;
1702 if (vs
->fidp
->fs
.fd
> 0) {
1703 close(vs
->fidp
->fs
.fd
);
1707 complete_pdu(s
, vs
->pdu
, err
);
1708 v9fs_string_free(&vs
->name
);
1709 v9fs_string_free(&vs
->fullname
);
1713 static void v9fs_lcreate_post_get_iounit(V9fsState
*s
, V9fsLcreateState
*vs
,
1720 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1723 v9fs_post_lcreate(s
, vs
, err
);
1726 static void v9fs_lcreate_post_do_open2(V9fsState
*s
, V9fsLcreateState
*vs
,
1729 if (vs
->fidp
->fs
.fd
== -1) {
1733 vs
->fidp
->fid_type
= P9_FID_FILE
;
1734 vs
->iounit
= get_iounit(s
, &vs
->fullname
);
1735 v9fs_lcreate_post_get_iounit(s
, vs
, err
);
1739 v9fs_post_lcreate(s
, vs
, err
);
1742 static void v9fs_lcreate(void *opaque
)
1744 V9fsPDU
*pdu
= opaque
;
1745 V9fsState
*s
= pdu
->s
;
1746 int32_t dfid
, flags
, mode
;
1748 V9fsLcreateState
*vs
;
1751 vs
= qemu_malloc(sizeof(*vs
));
1755 v9fs_string_init(&vs
->fullname
);
1757 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsddd", &dfid
, &vs
->name
, &flags
,
1760 vs
->fidp
= lookup_fid(s
, dfid
);
1761 if (vs
->fidp
== NULL
) {
1766 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
1769 /* Ignore direct disk access hint until the server supports it. */
1772 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
1774 v9fs_lcreate_post_do_open2(s
, vs
, err
);
1778 complete_pdu(s
, vs
->pdu
, err
);
1779 v9fs_string_free(&vs
->name
);
1783 static void v9fs_post_do_fsync(V9fsState
*s
, V9fsPDU
*pdu
, int err
)
1788 complete_pdu(s
, pdu
, err
);
1791 static void v9fs_fsync(void *opaque
)
1793 V9fsPDU
*pdu
= opaque
;
1794 V9fsState
*s
= pdu
->s
;
1801 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &datasync
);
1802 fidp
= lookup_fid(s
, fid
);
1805 v9fs_post_do_fsync(s
, pdu
, err
);
1808 err
= v9fs_do_fsync(s
, fidp
->fs
.fd
, datasync
);
1809 v9fs_post_do_fsync(s
, pdu
, err
);
1812 static void v9fs_clunk(void *opaque
)
1814 V9fsPDU
*pdu
= opaque
;
1815 V9fsState
*s
= pdu
->s
;
1820 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1822 err
= free_fid(s
, fid
);
1830 complete_pdu(s
, pdu
, err
);
1833 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1835 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1840 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1841 vs
->offset
+= vs
->count
;
1844 complete_pdu(s
, vs
->pdu
, err
);
1845 v9fs_stat_free(&vs
->v9stat
);
1846 v9fs_string_free(&vs
->name
);
1851 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1858 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1863 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1865 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1866 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1867 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1868 v9fs_read_post_seekdir(s
, vs
, err
);
1871 vs
->count
+= vs
->len
;
1872 v9fs_stat_free(&vs
->v9stat
);
1873 v9fs_string_free(&vs
->name
);
1874 vs
->dir_pos
= vs
->dent
->d_off
;
1875 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1876 v9fs_read_post_readdir(s
, vs
, err
);
1879 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1880 v9fs_read_post_seekdir(s
, vs
, err
);
1885 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1888 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1889 v9fs_string_init(&vs
->name
);
1890 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1892 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1893 v9fs_read_post_dir_lstat(s
, vs
, err
);
1897 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1898 vs
->offset
+= vs
->count
;
1900 complete_pdu(s
, vs
->pdu
, err
);
1905 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1907 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1908 v9fs_read_post_readdir(s
, vs
, err
);
1912 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1915 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
1916 v9fs_read_post_telldir(s
, vs
, err
);
1920 static void v9fs_read_post_preadv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1923 /* IO error return the error */
1927 vs
->total
+= vs
->len
;
1928 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1929 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1932 print_sg(vs
->sg
, vs
->cnt
);
1934 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1939 } while (vs
->len
== -1 && errno
== EINTR
);
1940 if (vs
->len
== -1) {
1943 v9fs_read_post_preadv(s
, vs
, err
);
1946 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1947 vs
->offset
+= vs
->count
;
1951 complete_pdu(s
, vs
->pdu
, err
);
1955 static void v9fs_xattr_read(V9fsState
*s
, V9fsReadState
*vs
)
1961 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
1962 read_count
= xattr_len
- vs
->off
;
1963 if (read_count
> vs
->count
) {
1964 read_count
= vs
->count
;
1965 } else if (read_count
< 0) {
1967 * read beyond XATTR value
1971 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", read_count
);
1972 vs
->offset
+= pdu_pack(vs
->pdu
, vs
->offset
,
1973 ((char *)vs
->fidp
->fs
.xattr
.value
) + vs
->off
,
1976 complete_pdu(s
, vs
->pdu
, err
);
1980 static void v9fs_read(void *opaque
)
1982 V9fsPDU
*pdu
= opaque
;
1983 V9fsState
*s
= pdu
->s
;
1988 vs
= qemu_malloc(sizeof(*vs
));
1995 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1997 vs
->fidp
= lookup_fid(s
, fid
);
1998 if (vs
->fidp
== NULL
) {
2003 if (vs
->fidp
->fid_type
== P9_FID_DIR
) {
2004 vs
->max_count
= vs
->count
;
2007 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
2009 v9fs_read_post_rewinddir(s
, vs
, err
);
2011 } else if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2013 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
2014 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2015 if (vs
->total
<= vs
->count
) {
2016 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2022 v9fs_read_post_preadv(s
, vs
, err
);
2025 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2026 v9fs_xattr_read(s
, vs
);
2032 complete_pdu(s
, pdu
, err
);
2036 static size_t v9fs_readdir_data_size(V9fsString
*name
)
2039 * Size of each dirent on the wire: size of qid (13) + size of offset (8)
2040 * size of type (1) + size of name.size (2) + strlen(name.data)
2042 return 24 + v9fs_string_size(name
);
2045 static int v9fs_do_readdir(V9fsState
*s
, V9fsPDU
*pdu
,
2046 V9fsFidState
*fidp
, int32_t max_count
)
2053 off_t saved_dir_pos
;
2054 struct dirent
*dent
;
2056 /* save the directory position */
2057 saved_dir_pos
= v9fs_co_telldir(s
, fidp
);
2058 if (saved_dir_pos
< 0) {
2059 return saved_dir_pos
;
2062 err
= v9fs_co_readdir(s
, fidp
, &dent
);
2066 v9fs_string_init(&name
);
2067 v9fs_string_sprintf(&name
, "%s", dent
->d_name
);
2068 if ((count
+ v9fs_readdir_data_size(&name
)) > max_count
) {
2069 /* Ran out of buffer. Set dir back to old position and return */
2070 v9fs_co_seekdir(s
, fidp
, saved_dir_pos
);
2071 v9fs_string_free(&name
);
2075 * Fill up just the path field of qid because the client uses
2076 * only that. To fill the entire qid structure we will have
2077 * to stat each dirent found, which is expensive
2079 size
= MIN(sizeof(dent
->d_ino
), sizeof(qid
.path
));
2080 memcpy(&qid
.path
, &dent
->d_ino
, size
);
2081 /* Fill the other fields with dummy values */
2085 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
2086 len
= pdu_marshal(pdu
, 11 + count
, "Qqbs",
2088 dent
->d_type
, &name
);
2090 v9fs_string_free(&name
);
2091 saved_dir_pos
= dent
->d_off
;
2099 static void v9fs_readdir(void *opaque
)
2105 int64_t initial_offset
;
2106 int32_t count
, max_count
;
2107 V9fsPDU
*pdu
= opaque
;
2108 V9fsState
*s
= pdu
->s
;
2110 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &initial_offset
, &max_count
);
2112 fidp
= lookup_fid(s
, fid
);
2113 if (fidp
== NULL
|| !fidp
->fs
.dir
) {
2117 if (initial_offset
== 0) {
2118 v9fs_co_rewinddir(s
, fidp
);
2120 v9fs_co_seekdir(s
, fidp
, initial_offset
);
2122 count
= v9fs_do_readdir(s
, pdu
, fidp
, max_count
);
2128 retval
+= pdu_marshal(pdu
, offset
, "d", count
);
2131 complete_pdu(s
, pdu
, retval
);
2134 static void v9fs_write_post_pwritev(V9fsState
*s
, V9fsWriteState
*vs
,
2138 /* IO error return the error */
2142 vs
->total
+= vs
->len
;
2143 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2144 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2147 print_sg(vs
->sg
, vs
->cnt
);
2149 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
2154 } while (vs
->len
== -1 && errno
== EINTR
);
2155 if (vs
->len
== -1) {
2158 v9fs_write_post_pwritev(s
, vs
, err
);
2161 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2164 complete_pdu(s
, vs
->pdu
, err
);
2168 static void v9fs_xattr_write(V9fsState
*s
, V9fsWriteState
*vs
)
2175 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2176 write_count
= xattr_len
- vs
->off
;
2177 if (write_count
> vs
->count
) {
2178 write_count
= vs
->count
;
2179 } else if (write_count
< 0) {
2181 * write beyond XATTR value len specified in
2187 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", write_count
);
2189 vs
->fidp
->fs
.xattr
.copied_len
+= write_count
;
2191 * Now copy the content from sg list
2193 for (i
= 0; i
< vs
->cnt
; i
++) {
2194 if (write_count
> vs
->sg
[i
].iov_len
) {
2195 to_copy
= vs
->sg
[i
].iov_len
;
2197 to_copy
= write_count
;
2199 memcpy((char *)vs
->fidp
->fs
.xattr
.value
+ vs
->off
,
2200 vs
->sg
[i
].iov_base
, to_copy
);
2201 /* updating vs->off since we are not using below */
2203 write_count
-= to_copy
;
2206 complete_pdu(s
, vs
->pdu
, err
);
2210 static void v9fs_write(void *opaque
)
2212 V9fsPDU
*pdu
= opaque
;
2213 V9fsState
*s
= pdu
->s
;
2218 vs
= qemu_malloc(sizeof(*vs
));
2226 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2229 vs
->fidp
= lookup_fid(s
, fid
);
2230 if (vs
->fidp
== NULL
) {
2235 if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2236 if (vs
->fidp
->fs
.fd
== -1) {
2240 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2242 * setxattr operation
2244 v9fs_xattr_write(s
, vs
);
2250 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2251 if (vs
->total
<= vs
->count
) {
2252 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
, vs
->off
);
2257 v9fs_write_post_pwritev(s
, vs
, err
);
2261 complete_pdu(s
, vs
->pdu
, err
);
2265 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2268 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2269 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2271 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2274 complete_pdu(s
, vs
->pdu
, err
);
2275 v9fs_string_free(&vs
->name
);
2276 v9fs_string_free(&vs
->extension
);
2277 v9fs_string_free(&vs
->fullname
);
2281 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2284 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2285 v9fs_create_post_getiounit(s
, vs
);
2289 complete_pdu(s
, vs
->pdu
, err
);
2290 v9fs_string_free(&vs
->name
);
2291 v9fs_string_free(&vs
->extension
);
2292 v9fs_string_free(&vs
->fullname
);
2296 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2301 v9fs_post_create(s
, vs
, err
);
2304 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2307 if (!vs
->fidp
->fs
.dir
) {
2310 vs
->fidp
->fid_type
= P9_FID_DIR
;
2311 v9fs_post_create(s
, vs
, err
);
2314 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2322 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2323 v9fs_create_post_opendir(s
, vs
, err
);
2327 v9fs_post_create(s
, vs
, err
);
2330 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2337 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2338 v9fs_create_post_dir_lstat(s
, vs
, err
);
2342 v9fs_post_create(s
, vs
, err
);
2345 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2348 vs
->fidp
->fid_type
= P9_FID_NONE
;
2349 close(vs
->fidp
->fs
.fd
);
2352 v9fs_post_create(s
, vs
, err
);
2356 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2358 if (vs
->fidp
->fs
.fd
== -1) {
2362 vs
->fidp
->fid_type
= P9_FID_FILE
;
2363 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
2364 v9fs_create_post_fstat(s
, vs
, err
);
2369 v9fs_post_create(s
, vs
, err
);
2373 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2376 if (err
== 0 || errno
!= ENOENT
) {
2381 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2382 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, vs
->perm
& 0777,
2384 v9fs_create_post_mkdir(s
, vs
, err
);
2385 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2386 err
= v9fs_do_symlink(s
, vs
->fidp
, vs
->extension
.data
,
2387 vs
->fullname
.data
, -1);
2388 v9fs_create_post_perms(s
, vs
, err
);
2389 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2390 int32_t nfid
= atoi(vs
->extension
.data
);
2391 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2392 if (nfidp
== NULL
) {
2394 v9fs_post_create(s
, vs
, err
);
2396 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2397 v9fs_create_post_perms(s
, vs
, err
);
2398 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2400 uint32_t major
, minor
;
2403 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2406 v9fs_post_create(s
, vs
, err
);
2418 v9fs_post_create(s
, vs
, err
);
2421 nmode
|= vs
->perm
& 0777;
2422 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, nmode
,
2423 makedev(major
, minor
), vs
->fidp
->uid
, -1);
2424 v9fs_create_post_perms(s
, vs
, err
);
2425 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2426 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFIFO
| (vs
->perm
& 0777),
2427 0, vs
->fidp
->uid
, -1);
2428 v9fs_post_create(s
, vs
, err
);
2429 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2430 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFSOCK
| (vs
->perm
& 0777),
2431 0, vs
->fidp
->uid
, -1);
2432 v9fs_post_create(s
, vs
, err
);
2434 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
2435 -1, omode_to_uflags(vs
->mode
)|O_CREAT
, vs
->perm
);
2437 v9fs_create_post_open2(s
, vs
, err
);
2443 v9fs_post_create(s
, vs
, err
);
2446 static void v9fs_create(void *opaque
)
2448 V9fsPDU
*pdu
= opaque
;
2449 V9fsState
*s
= pdu
->s
;
2451 V9fsCreateState
*vs
;
2454 vs
= qemu_malloc(sizeof(*vs
));
2458 v9fs_string_init(&vs
->fullname
);
2460 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2461 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2463 vs
->fidp
= lookup_fid(s
, fid
);
2464 if (vs
->fidp
== NULL
) {
2469 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2472 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2473 v9fs_create_post_lstat(s
, vs
, err
);
2477 complete_pdu(s
, vs
->pdu
, err
);
2478 v9fs_string_free(&vs
->name
);
2479 v9fs_string_free(&vs
->extension
);
2483 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2486 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2487 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2492 complete_pdu(s
, vs
->pdu
, err
);
2493 v9fs_string_free(&vs
->name
);
2494 v9fs_string_free(&vs
->symname
);
2495 v9fs_string_free(&vs
->fullname
);
2499 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2505 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2507 v9fs_post_symlink(s
, vs
, err
);
2510 static void v9fs_symlink(void *opaque
)
2512 V9fsPDU
*pdu
= opaque
;
2513 V9fsState
*s
= pdu
->s
;
2515 V9fsSymlinkState
*vs
;
2519 vs
= qemu_malloc(sizeof(*vs
));
2523 v9fs_string_init(&vs
->fullname
);
2525 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2526 &vs
->symname
, &gid
);
2528 vs
->dfidp
= lookup_fid(s
, dfid
);
2529 if (vs
->dfidp
== NULL
) {
2534 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2536 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2537 vs
->fullname
.data
, gid
);
2538 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2542 complete_pdu(s
, vs
->pdu
, err
);
2543 v9fs_string_free(&vs
->name
);
2544 v9fs_string_free(&vs
->symname
);
2548 static void v9fs_flush(void *opaque
)
2550 V9fsPDU
*pdu
= opaque
;
2551 V9fsState
*s
= pdu
->s
;
2552 /* A nop call with no return */
2553 complete_pdu(s
, pdu
, 7);
2557 static void v9fs_link(void *opaque
)
2559 V9fsPDU
*pdu
= opaque
;
2560 V9fsState
*s
= pdu
->s
;
2561 int32_t dfid
, oldfid
;
2562 V9fsFidState
*dfidp
, *oldfidp
;
2563 V9fsString name
, fullname
;
2567 v9fs_string_init(&fullname
);
2569 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2571 dfidp
= lookup_fid(s
, dfid
);
2572 if (dfidp
== NULL
) {
2577 oldfidp
= lookup_fid(s
, oldfid
);
2578 if (oldfidp
== NULL
) {
2583 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2585 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2589 v9fs_string_free(&fullname
);
2592 v9fs_string_free(&name
);
2593 complete_pdu(s
, pdu
, err
);
2596 static void v9fs_remove_post_remove(V9fsState
*s
, V9fsRemoveState
*vs
,
2605 /* For TREMOVE we need to clunk the fid even on failed remove */
2606 free_fid(s
, vs
->fidp
->fid
);
2608 complete_pdu(s
, vs
->pdu
, err
);
2612 static void v9fs_remove(void *opaque
)
2614 V9fsPDU
*pdu
= opaque
;
2615 V9fsState
*s
= pdu
->s
;
2617 V9fsRemoveState
*vs
;
2620 vs
= qemu_malloc(sizeof(*vs
));
2624 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
2626 vs
->fidp
= lookup_fid(s
, fid
);
2627 if (vs
->fidp
== NULL
) {
2632 err
= v9fs_do_remove(s
, &vs
->fidp
->path
);
2633 v9fs_remove_post_remove(s
, vs
, err
);
2637 complete_pdu(s
, pdu
, err
);
2641 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2650 v9fs_stat_free(&vs
->v9stat
);
2651 complete_pdu(s
, vs
->pdu
, err
);
2655 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2660 if (vs
->v9stat
.length
!= -1) {
2661 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2665 v9fs_wstat_post_truncate(s
, vs
, err
);
2669 v9fs_stat_free(&vs
->v9stat
);
2670 complete_pdu(s
, vs
->pdu
, err
);
2674 static int v9fs_complete_rename(V9fsState
*s
, V9fsRenameState
*vs
)
2677 char *old_name
, *new_name
;
2680 if (vs
->newdirfid
!= -1) {
2681 V9fsFidState
*dirfidp
;
2682 dirfidp
= lookup_fid(s
, vs
->newdirfid
);
2684 if (dirfidp
== NULL
) {
2689 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2691 new_name
= qemu_mallocz(dirfidp
->path
.size
+ vs
->name
.size
+ 2);
2693 strcpy(new_name
, dirfidp
->path
.data
);
2694 strcat(new_name
, "/");
2695 strcat(new_name
+ dirfidp
->path
.size
, vs
->name
.data
);
2697 old_name
= vs
->fidp
->path
.data
;
2698 end
= strrchr(old_name
, '/');
2704 new_name
= qemu_mallocz(end
- old_name
+ vs
->name
.size
+ 1);
2706 strncat(new_name
, old_name
, end
- old_name
);
2707 strncat(new_name
+ (end
- old_name
), vs
->name
.data
, vs
->name
.size
);
2710 v9fs_string_free(&vs
->name
);
2711 vs
->name
.data
= qemu_strdup(new_name
);
2712 vs
->name
.size
= strlen(new_name
);
2714 if (strcmp(new_name
, vs
->fidp
->path
.data
) != 0) {
2715 if (v9fs_do_rename(s
, &vs
->fidp
->path
, &vs
->name
)) {
2720 * Fixup fid's pointing to the old name to
2721 * start pointing to the new name
2723 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
2724 if (vs
->fidp
== fidp
) {
2726 * we replace name of this fid towards the end so
2727 * that our below v9fs_path_is_ancestor check will
2732 if (v9fs_path_is_ancestor(&vs
->fidp
->path
, &fidp
->path
)) {
2733 /* replace the name */
2734 v9fs_fix_path(&fidp
->path
, &vs
->name
,
2735 strlen(vs
->fidp
->path
.data
));
2738 v9fs_string_copy(&vs
->fidp
->path
, &vs
->name
);
2742 v9fs_string_free(&vs
->name
);
2746 static void v9fs_rename_post_rename(V9fsState
*s
, V9fsRenameState
*vs
, int err
)
2748 complete_pdu(s
, vs
->pdu
, err
);
2752 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2758 if (vs
->v9stat
.name
.size
!= 0) {
2759 V9fsRenameState
*vr
;
2761 vr
= qemu_mallocz(sizeof(V9fsRenameState
));
2764 vr
->fidp
= vs
->fidp
;
2765 vr
->offset
= vs
->offset
;
2766 vr
->name
.size
= vs
->v9stat
.name
.size
;
2767 vr
->name
.data
= qemu_strdup(vs
->v9stat
.name
.data
);
2769 err
= v9fs_complete_rename(s
, vr
);
2772 v9fs_wstat_post_rename(s
, vs
, err
);
2776 v9fs_stat_free(&vs
->v9stat
);
2777 complete_pdu(s
, vs
->pdu
, err
);
2781 static void v9fs_rename(void *opaque
)
2783 V9fsPDU
*pdu
= opaque
;
2784 V9fsState
*s
= pdu
->s
;
2786 V9fsRenameState
*vs
;
2789 vs
= qemu_malloc(sizeof(*vs
));
2793 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dds", &fid
, &vs
->newdirfid
, &vs
->name
);
2795 vs
->fidp
= lookup_fid(s
, fid
);
2796 if (vs
->fidp
== NULL
) {
2801 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
2803 err
= v9fs_complete_rename(s
, vs
);
2804 v9fs_rename_post_rename(s
, vs
, err
);
2807 complete_pdu(s
, vs
->pdu
, err
);
2811 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2817 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2818 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2819 vs
->v9stat
.n_gid
)) {
2823 v9fs_wstat_post_chown(s
, vs
, err
);
2827 v9fs_stat_free(&vs
->v9stat
);
2828 complete_pdu(s
, vs
->pdu
, err
);
2832 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2838 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2839 struct timespec times
[2];
2840 if (vs
->v9stat
.atime
!= -1) {
2841 times
[0].tv_sec
= vs
->v9stat
.atime
;
2842 times
[0].tv_nsec
= 0;
2844 times
[0].tv_nsec
= UTIME_OMIT
;
2846 if (vs
->v9stat
.mtime
!= -1) {
2847 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2848 times
[1].tv_nsec
= 0;
2850 times
[1].tv_nsec
= UTIME_OMIT
;
2853 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2858 v9fs_wstat_post_utime(s
, vs
, err
);
2862 v9fs_stat_free(&vs
->v9stat
);
2863 complete_pdu(s
, vs
->pdu
, err
);
2867 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2872 v9fs_stat_free(&vs
->v9stat
);
2873 complete_pdu(s
, vs
->pdu
, err
);
2877 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2886 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2888 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2889 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2890 /* Attempting to change the type */
2895 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2896 &vs
->v9stat
.extension
))) {
2899 v9fs_wstat_post_chmod(s
, vs
, err
);
2903 v9fs_stat_free(&vs
->v9stat
);
2904 complete_pdu(s
, vs
->pdu
, err
);
2908 static void v9fs_wstat(void *opaque
)
2910 V9fsPDU
*pdu
= opaque
;
2911 V9fsState
*s
= pdu
->s
;
2916 vs
= qemu_malloc(sizeof(*vs
));
2920 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2922 vs
->fidp
= lookup_fid(s
, fid
);
2923 if (vs
->fidp
== NULL
) {
2928 /* do we need to sync the file? */
2929 if (donttouch_stat(&vs
->v9stat
)) {
2930 err
= v9fs_do_fsync(s
, vs
->fidp
->fs
.fd
, 0);
2931 v9fs_wstat_post_fsync(s
, vs
, err
);
2935 if (vs
->v9stat
.mode
!= -1) {
2936 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2937 v9fs_wstat_post_lstat(s
, vs
, err
);
2941 v9fs_wstat_post_chmod(s
, vs
, err
);
2945 v9fs_stat_free(&vs
->v9stat
);
2946 complete_pdu(s
, vs
->pdu
, err
);
2950 static int v9fs_fill_statfs(V9fsState
*s
, V9fsPDU
*pdu
, struct statfs
*stbuf
)
2962 int32_t bsize_factor
;
2965 * compute bsize factor based on host file system block size
2968 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/stbuf
->f_bsize
;
2969 if (!bsize_factor
) {
2972 f_type
= stbuf
->f_type
;
2973 f_bsize
= stbuf
->f_bsize
;
2974 f_bsize
*= bsize_factor
;
2976 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2977 * adjust(divide) the number of blocks, free blocks and available
2978 * blocks by bsize factor
2980 f_blocks
= stbuf
->f_blocks
/bsize_factor
;
2981 f_bfree
= stbuf
->f_bfree
/bsize_factor
;
2982 f_bavail
= stbuf
->f_bavail
/bsize_factor
;
2983 f_files
= stbuf
->f_files
;
2984 f_ffree
= stbuf
->f_ffree
;
2985 fsid_val
= (unsigned int) stbuf
->f_fsid
.__val
[0] |
2986 (unsigned long long)stbuf
->f_fsid
.__val
[1] << 32;
2987 f_namelen
= stbuf
->f_namelen
;
2989 return pdu_marshal(pdu
, offset
, "ddqqqqqqd",
2990 f_type
, f_bsize
, f_blocks
, f_bfree
,
2991 f_bavail
, f_files
, f_ffree
,
2992 fsid_val
, f_namelen
);
2995 static void v9fs_statfs(void *opaque
)
3001 struct statfs stbuf
;
3002 V9fsPDU
*pdu
= opaque
;
3003 V9fsState
*s
= pdu
->s
;
3005 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3006 fidp
= lookup_fid(s
, fid
);
3011 retval
= v9fs_co_statfs(s
, &fidp
->path
, &stbuf
);
3016 retval
+= v9fs_fill_statfs(s
, pdu
, &stbuf
);
3018 complete_pdu(s
, pdu
, retval
);
3022 static void v9fs_mknod_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3029 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3030 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3033 complete_pdu(s
, vs
->pdu
, err
);
3034 v9fs_string_free(&vs
->fullname
);
3035 v9fs_string_free(&vs
->name
);
3039 static void v9fs_mknod_post_mknod(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3046 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3047 v9fs_mknod_post_lstat(s
, vs
, err
);
3050 complete_pdu(s
, vs
->pdu
, err
);
3051 v9fs_string_free(&vs
->fullname
);
3052 v9fs_string_free(&vs
->name
);
3056 static void v9fs_mknod(void *opaque
)
3058 V9fsPDU
*pdu
= opaque
;
3059 V9fsState
*s
= pdu
->s
;
3068 vs
= qemu_malloc(sizeof(*vs
));
3072 v9fs_string_init(&vs
->fullname
);
3073 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdddd", &fid
, &vs
->name
, &mode
,
3074 &major
, &minor
, &gid
);
3076 fidp
= lookup_fid(s
, fid
);
3082 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3083 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, mode
, makedev(major
, minor
),
3085 v9fs_mknod_post_mknod(s
, vs
, err
);
3089 complete_pdu(s
, vs
->pdu
, err
);
3090 v9fs_string_free(&vs
->fullname
);
3091 v9fs_string_free(&vs
->name
);
3096 * Implement posix byte range locking code
3097 * Server side handling of locking code is very simple, because 9p server in
3098 * QEMU can handle only one client. And most of the lock handling
3099 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
3100 * do any thing in * qemu 9p server side lock code path.
3101 * So when a TLOCK request comes, always return success
3104 static void v9fs_lock(void *opaque
)
3106 V9fsPDU
*pdu
= opaque
;
3107 V9fsState
*s
= pdu
->s
;
3108 int32_t fid
, err
= 0;
3111 vs
= qemu_mallocz(sizeof(*vs
));
3115 vs
->flock
= qemu_malloc(sizeof(*vs
->flock
));
3116 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dbdqqds", &fid
, &vs
->flock
->type
,
3117 &vs
->flock
->flags
, &vs
->flock
->start
, &vs
->flock
->length
,
3118 &vs
->flock
->proc_id
, &vs
->flock
->client_id
);
3120 vs
->status
= P9_LOCK_ERROR
;
3122 /* We support only block flag now (that too ignored currently) */
3123 if (vs
->flock
->flags
& ~P9_LOCK_FLAGS_BLOCK
) {
3127 vs
->fidp
= lookup_fid(s
, fid
);
3128 if (vs
->fidp
== NULL
) {
3133 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
3138 vs
->status
= P9_LOCK_SUCCESS
;
3140 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "b", vs
->status
);
3141 complete_pdu(s
, vs
->pdu
, err
);
3142 qemu_free(vs
->flock
);
3147 * When a TGETLOCK request comes, always return success because all lock
3148 * handling is done by client's VFS layer.
3151 static void v9fs_getlock(void *opaque
)
3153 V9fsPDU
*pdu
= opaque
;
3154 V9fsState
*s
= pdu
->s
;
3155 int32_t fid
, err
= 0;
3156 V9fsGetlockState
*vs
;
3158 vs
= qemu_mallocz(sizeof(*vs
));
3162 vs
->glock
= qemu_malloc(sizeof(*vs
->glock
));
3163 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dbqqds", &fid
, &vs
->glock
->type
,
3164 &vs
->glock
->start
, &vs
->glock
->length
, &vs
->glock
->proc_id
,
3165 &vs
->glock
->client_id
);
3167 vs
->fidp
= lookup_fid(s
, fid
);
3168 if (vs
->fidp
== NULL
) {
3173 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
3178 vs
->glock
->type
= F_UNLCK
;
3179 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "bqqds", vs
->glock
->type
,
3180 vs
->glock
->start
, vs
->glock
->length
, vs
->glock
->proc_id
,
3181 &vs
->glock
->client_id
);
3183 complete_pdu(s
, vs
->pdu
, err
);
3184 qemu_free(vs
->glock
);
3188 static void v9fs_mkdir_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3195 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3196 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3199 complete_pdu(s
, vs
->pdu
, err
);
3200 v9fs_string_free(&vs
->fullname
);
3201 v9fs_string_free(&vs
->name
);
3205 static void v9fs_mkdir_post_mkdir(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3212 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3213 v9fs_mkdir_post_lstat(s
, vs
, err
);
3216 complete_pdu(s
, vs
->pdu
, err
);
3217 v9fs_string_free(&vs
->fullname
);
3218 v9fs_string_free(&vs
->name
);
3222 static void v9fs_mkdir(void *opaque
)
3224 V9fsPDU
*pdu
= opaque
;
3225 V9fsState
*s
= pdu
->s
;
3233 vs
= qemu_malloc(sizeof(*vs
));
3237 v9fs_string_init(&vs
->fullname
);
3238 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdd", &fid
, &vs
->name
, &mode
,
3241 fidp
= lookup_fid(s
, fid
);
3247 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3248 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, mode
, fidp
->uid
, gid
);
3249 v9fs_mkdir_post_mkdir(s
, vs
, err
);
3253 complete_pdu(s
, vs
->pdu
, err
);
3254 v9fs_string_free(&vs
->fullname
);
3255 v9fs_string_free(&vs
->name
);
3259 static void v9fs_xattrwalk(void *opaque
)
3265 int32_t fid
, newfid
;
3266 V9fsFidState
*file_fidp
;
3267 V9fsFidState
*xattr_fidp
;
3268 V9fsPDU
*pdu
= opaque
;
3269 V9fsState
*s
= pdu
->s
;
3271 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newfid
, &name
);
3272 file_fidp
= lookup_fid(s
, fid
);
3273 if (file_fidp
== NULL
) {
3277 xattr_fidp
= alloc_fid(s
, newfid
);
3278 if (xattr_fidp
== NULL
) {
3282 v9fs_string_copy(&xattr_fidp
->path
, &file_fidp
->path
);
3283 if (name
.data
[0] == 0) {
3285 * listxattr request. Get the size first
3287 size
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
, NULL
, 0);
3290 free_fid(s
, xattr_fidp
->fid
);
3294 * Read the xattr value
3296 xattr_fidp
->fs
.xattr
.len
= size
;
3297 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3298 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3300 xattr_fidp
->fs
.xattr
.value
= qemu_malloc(size
);
3301 err
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
,
3302 xattr_fidp
->fs
.xattr
.value
,
3303 xattr_fidp
->fs
.xattr
.len
);
3305 free_fid(s
, xattr_fidp
->fid
);
3309 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3313 * specific xattr fid. We check for xattr
3314 * presence also collect the xattr size
3316 size
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
3320 free_fid(s
, xattr_fidp
->fid
);
3324 * Read the xattr value
3326 xattr_fidp
->fs
.xattr
.len
= size
;
3327 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3328 xattr_fidp
->fs
.xattr
.copied_len
= -1;
3330 xattr_fidp
->fs
.xattr
.value
= qemu_malloc(size
);
3331 err
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
3332 &name
, xattr_fidp
->fs
.xattr
.value
,
3333 xattr_fidp
->fs
.xattr
.len
);
3335 free_fid(s
, xattr_fidp
->fid
);
3339 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
3343 complete_pdu(s
, pdu
, err
);
3344 v9fs_string_free(&name
);
3347 static void v9fs_xattrcreate(void *opaque
)
3355 V9fsFidState
*file_fidp
;
3356 V9fsFidState
*xattr_fidp
;
3357 V9fsPDU
*pdu
= opaque
;
3358 V9fsState
*s
= pdu
->s
;
3360 pdu_unmarshal(pdu
, offset
, "dsqd",
3361 &fid
, &name
, &size
, &flags
);
3363 file_fidp
= lookup_fid(s
, fid
);
3364 if (file_fidp
== NULL
) {
3368 /* Make the file fid point to xattr */
3369 xattr_fidp
= file_fidp
;
3370 xattr_fidp
->fid_type
= P9_FID_XATTR
;
3371 xattr_fidp
->fs
.xattr
.copied_len
= 0;
3372 xattr_fidp
->fs
.xattr
.len
= size
;
3373 xattr_fidp
->fs
.xattr
.flags
= flags
;
3374 v9fs_string_init(&xattr_fidp
->fs
.xattr
.name
);
3375 v9fs_string_copy(&xattr_fidp
->fs
.xattr
.name
, &name
);
3377 xattr_fidp
->fs
.xattr
.value
= qemu_malloc(size
);
3379 xattr_fidp
->fs
.xattr
.value
= NULL
;
3383 complete_pdu(s
, pdu
, err
);
3384 v9fs_string_free(&name
);
3387 static void v9fs_readlink(void *opaque
)
3389 V9fsPDU
*pdu
= opaque
;
3396 pdu_unmarshal(pdu
, offset
, "d", &fid
);
3397 fidp
= lookup_fid(pdu
->s
, fid
);
3403 v9fs_string_init(&target
);
3404 err
= v9fs_co_readlink(pdu
->s
, &fidp
->path
, &target
);
3408 offset
+= pdu_marshal(pdu
, offset
, "s", &target
);
3410 v9fs_string_free(&target
);
3412 complete_pdu(pdu
->s
, pdu
, err
);
3415 static CoroutineEntry
*pdu_co_handlers
[] = {
3416 [P9_TREADDIR
] = v9fs_readdir
,
3417 [P9_TSTATFS
] = v9fs_statfs
,
3418 [P9_TGETATTR
] = v9fs_getattr
,
3419 [P9_TSETATTR
] = v9fs_setattr
,
3420 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
3421 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
3422 [P9_TMKNOD
] = v9fs_mknod
,
3423 [P9_TRENAME
] = v9fs_rename
,
3424 [P9_TLOCK
] = v9fs_lock
,
3425 [P9_TGETLOCK
] = v9fs_getlock
,
3426 [P9_TREADLINK
] = v9fs_readlink
,
3427 [P9_TMKDIR
] = v9fs_mkdir
,
3428 [P9_TVERSION
] = v9fs_version
,
3429 [P9_TLOPEN
] = v9fs_open
,
3430 [P9_TATTACH
] = v9fs_attach
,
3431 [P9_TSTAT
] = v9fs_stat
,
3432 [P9_TWALK
] = v9fs_walk
,
3433 [P9_TCLUNK
] = v9fs_clunk
,
3434 [P9_TFSYNC
] = v9fs_fsync
,
3435 [P9_TOPEN
] = v9fs_open
,
3436 [P9_TREAD
] = v9fs_read
,
3438 [P9_TAUTH
] = v9fs_auth
,
3440 [P9_TFLUSH
] = v9fs_flush
,
3441 [P9_TLINK
] = v9fs_link
,
3442 [P9_TSYMLINK
] = v9fs_symlink
,
3443 [P9_TCREATE
] = v9fs_create
,
3444 [P9_TLCREATE
] = v9fs_lcreate
,
3445 [P9_TWRITE
] = v9fs_write
,
3446 [P9_TWSTAT
] = v9fs_wstat
,
3447 [P9_TREMOVE
] = v9fs_remove
,
3450 static void v9fs_op_not_supp(void *opaque
)
3452 V9fsPDU
*pdu
= opaque
;
3453 complete_pdu(pdu
->s
, pdu
, -EOPNOTSUPP
);
3456 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3459 CoroutineEntry
*handler
;
3464 if (pdu
->id
>= ARRAY_SIZE(pdu_co_handlers
) ||
3465 (pdu_co_handlers
[pdu
->id
] == NULL
)) {
3466 handler
= v9fs_op_not_supp
;
3468 handler
= pdu_co_handlers
[pdu
->id
];
3470 co
= qemu_coroutine_create(handler
);
3471 qemu_coroutine_enter(co
, pdu
);
3474 void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3476 V9fsState
*s
= (V9fsState
*)vdev
;
3480 while ((pdu
= alloc_pdu(s
)) &&
3481 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3484 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3485 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3487 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3489 memcpy(&pdu
->size
, ptr
, 4);
3491 memcpy(&pdu
->tag
, ptr
+ 5, 2);