]>
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 void v9fs_do_rewinddir(V9fsState
*s
, DIR *dir
)
87 return s
->ops
->rewinddir(&s
->ctx
, dir
);
90 static off_t
v9fs_do_telldir(V9fsState
*s
, DIR *dir
)
92 return s
->ops
->telldir(&s
->ctx
, dir
);
95 static void v9fs_do_seekdir(V9fsState
*s
, DIR *dir
, off_t off
)
97 return s
->ops
->seekdir(&s
->ctx
, dir
, off
);
100 static int v9fs_do_preadv(V9fsState
*s
, int fd
, const struct iovec
*iov
,
101 int iovcnt
, int64_t offset
)
103 return s
->ops
->preadv(&s
->ctx
, fd
, iov
, iovcnt
, offset
);
106 static int v9fs_do_pwritev(V9fsState
*s
, int fd
, const struct iovec
*iov
,
107 int iovcnt
, int64_t offset
)
109 return s
->ops
->pwritev(&s
->ctx
, fd
, iov
, iovcnt
, offset
);
112 static int v9fs_do_chmod(V9fsState
*s
, V9fsString
*path
, mode_t mode
)
117 return s
->ops
->chmod(&s
->ctx
, path
->data
, &cred
);
120 static int v9fs_do_symlink(V9fsState
*s
, V9fsFidState
*fidp
,
121 const char *oldpath
, const char *newpath
, gid_t gid
)
125 cred
.fc_uid
= fidp
->uid
;
129 return s
->ops
->symlink(&s
->ctx
, oldpath
, newpath
, &cred
);
132 static int v9fs_do_link(V9fsState
*s
, V9fsString
*oldpath
, V9fsString
*newpath
)
134 return s
->ops
->link(&s
->ctx
, oldpath
->data
, newpath
->data
);
137 static int v9fs_do_truncate(V9fsState
*s
, V9fsString
*path
, off_t size
)
139 return s
->ops
->truncate(&s
->ctx
, path
->data
, size
);
142 static int v9fs_do_chown(V9fsState
*s
, V9fsString
*path
, uid_t uid
, gid_t gid
)
149 return s
->ops
->chown(&s
->ctx
, path
->data
, &cred
);
152 static int v9fs_do_utimensat(V9fsState
*s
, V9fsString
*path
,
153 const struct timespec times
[2])
155 return s
->ops
->utimensat(&s
->ctx
, path
->data
, times
);
158 static int v9fs_do_fsync(V9fsState
*s
, int fd
, int datasync
)
160 return s
->ops
->fsync(&s
->ctx
, fd
, datasync
);
163 static void v9fs_string_init(V9fsString
*str
)
169 static void v9fs_string_free(V9fsString
*str
)
176 static void v9fs_string_null(V9fsString
*str
)
178 v9fs_string_free(str
);
181 static int number_to_string(void *arg
, char type
)
183 unsigned int ret
= 0;
187 unsigned int num
= *(unsigned int *)arg
;
196 unsigned long num
= *(unsigned long *)arg
;
204 printf("Number_to_string: Unknown number format\n");
211 static int GCC_FMT_ATTR(2, 0)
212 v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
215 char *iter
= (char *)fmt
;
219 unsigned int arg_uint
;
220 unsigned long arg_ulong
;
222 /* Find the number of %'s that denotes an argument */
223 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
228 len
= strlen(fmt
) - 2*nr_args
;
238 /* Now parse the format string */
239 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
243 arg_uint
= va_arg(ap2
, unsigned int);
244 len
+= number_to_string((void *)&arg_uint
, 'u');
247 if (*++iter
== 'u') {
248 arg_ulong
= va_arg(ap2
, unsigned long);
249 len
+= number_to_string((void *)&arg_ulong
, 'U');
255 arg_char_ptr
= va_arg(ap2
, char *);
256 len
+= strlen(arg_char_ptr
);
263 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
270 *strp
= g_malloc((len
+ 1) * sizeof(**strp
));
272 return vsprintf(*strp
, fmt
, ap
);
275 static void GCC_FMT_ATTR(2, 3)
276 v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
281 v9fs_string_free(str
);
284 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
291 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
293 v9fs_string_free(lhs
);
294 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
298 * Return TRUE if s1 is an ancestor of s2.
300 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
301 * As a special case, We treat s1 as ancestor of s2 if they are same!
303 static int v9fs_path_is_ancestor(V9fsString
*s1
, V9fsString
*s2
)
305 if (!strncmp(s1
->data
, s2
->data
, s1
->size
)) {
306 if (s2
->data
[s1
->size
] == '\0' || s2
->data
[s1
->size
] == '/') {
313 static size_t v9fs_string_size(V9fsString
*str
)
318 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
322 for (f
= s
->fid_list
; f
; f
= f
->next
) {
331 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
335 f
= lookup_fid(s
, fid
);
340 f
= g_malloc0(sizeof(V9fsFidState
));
343 f
->fid_type
= P9_FID_NONE
;
345 f
->next
= s
->fid_list
;
351 static int v9fs_xattr_fid_clunk(V9fsState
*s
, V9fsFidState
*fidp
)
355 if (fidp
->fs
.xattr
.copied_len
== -1) {
356 /* getxattr/listxattr fid */
360 * if this is fid for setxattr. clunk should
361 * result in setxattr localcall
363 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
364 /* clunk after partial write */
368 if (fidp
->fs
.xattr
.len
) {
369 retval
= v9fs_co_lsetxattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
370 fidp
->fs
.xattr
.value
,
372 fidp
->fs
.xattr
.flags
);
374 retval
= v9fs_co_lremovexattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
);
377 v9fs_string_free(&fidp
->fs
.xattr
.name
);
379 if (fidp
->fs
.xattr
.value
) {
380 g_free(fidp
->fs
.xattr
.value
);
385 static int free_fid(V9fsState
*s
, int32_t fid
)
388 V9fsFidState
**fidpp
, *fidp
;
390 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
391 if ((*fidpp
)->fid
== fid
) {
396 if (*fidpp
== NULL
) {
403 if (fidp
->fid_type
== P9_FID_FILE
) {
404 retval
= v9fs_co_close(s
, fidp
);
405 } else if (fidp
->fid_type
== P9_FID_DIR
) {
406 retval
= v9fs_co_closedir(s
, fidp
);
407 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
408 retval
= v9fs_xattr_fid_clunk(s
, fidp
);
410 v9fs_string_free(&fidp
->path
);
415 #define P9_QID_TYPE_DIR 0x80
416 #define P9_QID_TYPE_SYMLINK 0x02
418 #define P9_STAT_MODE_DIR 0x80000000
419 #define P9_STAT_MODE_APPEND 0x40000000
420 #define P9_STAT_MODE_EXCL 0x20000000
421 #define P9_STAT_MODE_MOUNT 0x10000000
422 #define P9_STAT_MODE_AUTH 0x08000000
423 #define P9_STAT_MODE_TMP 0x04000000
424 #define P9_STAT_MODE_SYMLINK 0x02000000
425 #define P9_STAT_MODE_LINK 0x01000000
426 #define P9_STAT_MODE_DEVICE 0x00800000
427 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
428 #define P9_STAT_MODE_SOCKET 0x00100000
429 #define P9_STAT_MODE_SETUID 0x00080000
430 #define P9_STAT_MODE_SETGID 0x00040000
431 #define P9_STAT_MODE_SETVTX 0x00010000
433 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
434 P9_STAT_MODE_SYMLINK | \
435 P9_STAT_MODE_LINK | \
436 P9_STAT_MODE_DEVICE | \
437 P9_STAT_MODE_NAMED_PIPE | \
440 /* This is the algorithm from ufs in spfs */
441 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
445 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
446 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
447 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
449 if (S_ISDIR(stbuf
->st_mode
)) {
450 qidp
->type
|= P9_QID_TYPE_DIR
;
452 if (S_ISLNK(stbuf
->st_mode
)) {
453 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
457 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
462 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
467 stat_to_qid(&stbuf
, qidp
);
471 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
475 if (!QLIST_EMPTY(&s
->free_list
)) {
476 pdu
= QLIST_FIRST(&s
->free_list
);
477 QLIST_REMOVE(pdu
, next
);
482 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
488 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
492 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
493 size_t offset
, size_t size
, int pack
)
498 for (i
= 0; size
&& i
< sg_count
; i
++) {
500 if (offset
>= sg
[i
].iov_len
) {
502 offset
-= sg
[i
].iov_len
;
505 len
= MIN(sg
[i
].iov_len
- offset
, size
);
507 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
509 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
524 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
526 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
530 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
533 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
537 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
541 struct iovec
*src_sg
;
545 src_sg
= pdu
->elem
.in_sg
;
546 num
= pdu
->elem
.in_num
;
548 src_sg
= pdu
->elem
.out_sg
;
549 num
= pdu
->elem
.out_num
;
553 for (i
= 0; i
< num
; i
++) {
555 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
556 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
558 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
559 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
560 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
561 sg
[j
].iov_base
+= (offset
- pos
);
562 sg
[j
].iov_len
-= (offset
- pos
);
565 pos
+= src_sg
[i
].iov_len
;
571 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
573 size_t old_offset
= offset
;
578 for (i
= 0; fmt
[i
]; i
++) {
581 uint8_t *valp
= va_arg(ap
, uint8_t *);
582 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
587 valp
= va_arg(ap
, uint16_t *);
588 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
589 *valp
= le16_to_cpu(val
);
594 valp
= va_arg(ap
, uint32_t *);
595 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
596 *valp
= le32_to_cpu(val
);
601 valp
= va_arg(ap
, uint64_t *);
602 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
603 *valp
= le64_to_cpu(val
);
607 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
608 int *iovcnt
= va_arg(ap
, int *);
609 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
613 V9fsString
*str
= va_arg(ap
, V9fsString
*);
614 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
615 /* FIXME: sanity check str->size */
616 str
->data
= g_malloc(str
->size
+ 1);
617 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
618 str
->data
[str
->size
] = 0;
622 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
623 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
624 &qidp
->type
, &qidp
->version
, &qidp
->path
);
628 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
629 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
630 &statp
->size
, &statp
->type
, &statp
->dev
,
631 &statp
->qid
, &statp
->mode
, &statp
->atime
,
632 &statp
->mtime
, &statp
->length
,
633 &statp
->name
, &statp
->uid
, &statp
->gid
,
634 &statp
->muid
, &statp
->extension
,
635 &statp
->n_uid
, &statp
->n_gid
,
640 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
641 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
642 &iattr
->valid
, &iattr
->mode
,
643 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
644 &iattr
->atime_sec
, &iattr
->atime_nsec
,
645 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
655 return offset
- old_offset
;
658 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
660 size_t old_offset
= offset
;
665 for (i
= 0; fmt
[i
]; i
++) {
668 uint8_t val
= va_arg(ap
, int);
669 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
674 cpu_to_le16w(&val
, va_arg(ap
, int));
675 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
680 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
681 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
686 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
687 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
691 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
692 int *iovcnt
= va_arg(ap
, int *);
693 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
697 V9fsString
*str
= va_arg(ap
, V9fsString
*);
698 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
699 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
703 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
704 offset
+= pdu_marshal(pdu
, offset
, "bdq",
705 qidp
->type
, qidp
->version
, qidp
->path
);
709 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
710 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
711 statp
->size
, statp
->type
, statp
->dev
,
712 &statp
->qid
, statp
->mode
, statp
->atime
,
713 statp
->mtime
, statp
->length
, &statp
->name
,
714 &statp
->uid
, &statp
->gid
, &statp
->muid
,
715 &statp
->extension
, statp
->n_uid
,
716 statp
->n_gid
, statp
->n_muid
);
720 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
721 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
722 statp
->st_result_mask
,
723 &statp
->qid
, statp
->st_mode
,
724 statp
->st_uid
, statp
->st_gid
,
725 statp
->st_nlink
, statp
->st_rdev
,
726 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
727 statp
->st_atime_sec
, statp
->st_atime_nsec
,
728 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
729 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
730 statp
->st_btime_sec
, statp
->st_btime_nsec
,
731 statp
->st_gen
, statp
->st_data_version
);
740 return offset
- old_offset
;
743 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
745 int8_t id
= pdu
->id
+ 1; /* Response */
751 if (s
->proto_version
!= V9FS_PROTO_2000L
) {
754 str
.data
= strerror(err
);
755 str
.size
= strlen(str
.data
);
757 len
+= pdu_marshal(pdu
, len
, "s", &str
);
761 len
+= pdu_marshal(pdu
, len
, "d", err
);
763 if (s
->proto_version
== V9FS_PROTO_2000L
) {
768 /* fill out the header */
769 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
771 /* keep these in sync */
775 /* push onto queue and notify */
776 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
778 /* FIXME: we should batch these completions */
779 virtio_notify(&s
->vdev
, s
->vq
);
784 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
789 if (mode
& P9_STAT_MODE_DIR
) {
793 if (mode
& P9_STAT_MODE_SYMLINK
) {
796 if (mode
& P9_STAT_MODE_SOCKET
) {
799 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
802 if (mode
& P9_STAT_MODE_DEVICE
) {
803 if (extension
&& extension
->data
[0] == 'c') {
814 if (mode
& P9_STAT_MODE_SETUID
) {
817 if (mode
& P9_STAT_MODE_SETGID
) {
820 if (mode
& P9_STAT_MODE_SETVTX
) {
827 static int donttouch_stat(V9fsStat
*stat
)
829 if (stat
->type
== -1 &&
831 stat
->qid
.type
== -1 &&
832 stat
->qid
.version
== -1 &&
833 stat
->qid
.path
== -1 &&
837 stat
->length
== -1 &&
844 stat
->n_muid
== -1) {
851 static void v9fs_stat_free(V9fsStat
*stat
)
853 v9fs_string_free(&stat
->name
);
854 v9fs_string_free(&stat
->uid
);
855 v9fs_string_free(&stat
->gid
);
856 v9fs_string_free(&stat
->muid
);
857 v9fs_string_free(&stat
->extension
);
860 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
864 mode
= stbuf
->st_mode
& 0777;
865 if (S_ISDIR(stbuf
->st_mode
)) {
866 mode
|= P9_STAT_MODE_DIR
;
869 if (S_ISLNK(stbuf
->st_mode
)) {
870 mode
|= P9_STAT_MODE_SYMLINK
;
873 if (S_ISSOCK(stbuf
->st_mode
)) {
874 mode
|= P9_STAT_MODE_SOCKET
;
877 if (S_ISFIFO(stbuf
->st_mode
)) {
878 mode
|= P9_STAT_MODE_NAMED_PIPE
;
881 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
882 mode
|= P9_STAT_MODE_DEVICE
;
885 if (stbuf
->st_mode
& S_ISUID
) {
886 mode
|= P9_STAT_MODE_SETUID
;
889 if (stbuf
->st_mode
& S_ISGID
) {
890 mode
|= P9_STAT_MODE_SETGID
;
893 if (stbuf
->st_mode
& S_ISVTX
) {
894 mode
|= P9_STAT_MODE_SETVTX
;
900 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
901 const struct stat
*stbuf
,
907 memset(v9stat
, 0, sizeof(*v9stat
));
909 stat_to_qid(stbuf
, &v9stat
->qid
);
910 v9stat
->mode
= stat_to_v9mode(stbuf
);
911 v9stat
->atime
= stbuf
->st_atime
;
912 v9stat
->mtime
= stbuf
->st_mtime
;
913 v9stat
->length
= stbuf
->st_size
;
915 v9fs_string_null(&v9stat
->uid
);
916 v9fs_string_null(&v9stat
->gid
);
917 v9fs_string_null(&v9stat
->muid
);
919 v9stat
->n_uid
= stbuf
->st_uid
;
920 v9stat
->n_gid
= stbuf
->st_gid
;
923 v9fs_string_null(&v9stat
->extension
);
925 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
926 err
= v9fs_co_readlink(s
, name
, &v9stat
->extension
);
930 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
931 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
932 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
933 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
934 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
935 v9fs_string_sprintf(&v9stat
->extension
, "%s %lu",
936 "HARDLINKCOUNT", (unsigned long)stbuf
->st_nlink
);
939 str
= strrchr(name
->data
, '/');
946 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
949 v9fs_string_size(&v9stat
->name
) +
950 v9fs_string_size(&v9stat
->uid
) +
951 v9fs_string_size(&v9stat
->gid
) +
952 v9fs_string_size(&v9stat
->muid
) +
953 v9fs_string_size(&v9stat
->extension
);
957 #define P9_STATS_MODE 0x00000001ULL
958 #define P9_STATS_NLINK 0x00000002ULL
959 #define P9_STATS_UID 0x00000004ULL
960 #define P9_STATS_GID 0x00000008ULL
961 #define P9_STATS_RDEV 0x00000010ULL
962 #define P9_STATS_ATIME 0x00000020ULL
963 #define P9_STATS_MTIME 0x00000040ULL
964 #define P9_STATS_CTIME 0x00000080ULL
965 #define P9_STATS_INO 0x00000100ULL
966 #define P9_STATS_SIZE 0x00000200ULL
967 #define P9_STATS_BLOCKS 0x00000400ULL
969 #define P9_STATS_BTIME 0x00000800ULL
970 #define P9_STATS_GEN 0x00001000ULL
971 #define P9_STATS_DATA_VERSION 0x00002000ULL
973 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
974 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
977 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
978 V9fsStatDotl
*v9lstat
)
980 memset(v9lstat
, 0, sizeof(*v9lstat
));
982 v9lstat
->st_mode
= stbuf
->st_mode
;
983 v9lstat
->st_nlink
= stbuf
->st_nlink
;
984 v9lstat
->st_uid
= stbuf
->st_uid
;
985 v9lstat
->st_gid
= stbuf
->st_gid
;
986 v9lstat
->st_rdev
= stbuf
->st_rdev
;
987 v9lstat
->st_size
= stbuf
->st_size
;
988 v9lstat
->st_blksize
= stbuf
->st_blksize
;
989 v9lstat
->st_blocks
= stbuf
->st_blocks
;
990 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
991 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
992 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
993 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
994 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
995 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
996 /* Currently we only support BASIC fields in stat */
997 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
999 stat_to_qid(stbuf
, &v9lstat
->qid
);
1002 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1004 while (len
&& *iovcnt
) {
1005 if (len
< sg
->iov_len
) {
1007 sg
->iov_base
+= len
;
1019 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1024 for (i
= 0; i
< *cnt
; i
++) {
1025 if ((total
+ sg
[i
].iov_len
) > cap
) {
1026 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1030 total
+= sg
[i
].iov_len
;
1038 static void print_sg(struct iovec
*sg
, int cnt
)
1042 printf("sg[%d]: {", cnt
);
1043 for (i
= 0; i
< cnt
; i
++) {
1047 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1052 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1055 v9fs_string_init(&str
);
1056 v9fs_string_copy(&str
, dst
);
1057 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1058 v9fs_string_free(&str
);
1061 static void v9fs_version(void *opaque
)
1063 V9fsPDU
*pdu
= opaque
;
1064 V9fsState
*s
= pdu
->s
;
1068 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1070 if (!strcmp(version
.data
, "9P2000.u")) {
1071 s
->proto_version
= V9FS_PROTO_2000U
;
1072 } else if (!strcmp(version
.data
, "9P2000.L")) {
1073 s
->proto_version
= V9FS_PROTO_2000L
;
1075 v9fs_string_sprintf(&version
, "unknown");
1078 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1079 complete_pdu(s
, pdu
, offset
);
1081 v9fs_string_free(&version
);
1085 static void v9fs_attach(void *opaque
)
1087 V9fsPDU
*pdu
= opaque
;
1088 V9fsState
*s
= pdu
->s
;
1089 int32_t fid
, afid
, n_uname
;
1090 V9fsString uname
, aname
;
1096 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1098 fidp
= alloc_fid(s
, fid
);
1104 fidp
->uid
= n_uname
;
1106 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1107 err
= fid_to_qid(s
, fidp
, &qid
);
1114 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1118 complete_pdu(s
, pdu
, err
);
1119 v9fs_string_free(&uname
);
1120 v9fs_string_free(&aname
);
1123 static void v9fs_stat(void *opaque
)
1131 V9fsPDU
*pdu
= opaque
;
1132 V9fsState
*s
= pdu
->s
;
1134 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1135 fidp
= lookup_fid(s
, fid
);
1140 err
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1144 err
= stat_to_v9stat(s
, &fidp
->path
, &stbuf
, &v9stat
);
1148 offset
+= pdu_marshal(pdu
, offset
, "wS", 0, &v9stat
);
1150 v9fs_stat_free(&v9stat
);
1152 complete_pdu(s
, pdu
, err
);
1155 static void v9fs_getattr(void *opaque
)
1162 uint64_t request_mask
;
1163 V9fsStatDotl v9stat_dotl
;
1164 V9fsPDU
*pdu
= opaque
;
1165 V9fsState
*s
= pdu
->s
;
1167 pdu_unmarshal(pdu
, offset
, "dq", &fid
, &request_mask
);
1169 fidp
= lookup_fid(s
, fid
);
1175 * Currently we only support BASIC fields in stat, so there is no
1176 * need to look at request_mask.
1178 retval
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1182 stat_to_v9stat_dotl(s
, &stbuf
, &v9stat_dotl
);
1184 retval
+= pdu_marshal(pdu
, offset
, "A", &v9stat_dotl
);
1186 complete_pdu(s
, pdu
, retval
);
1189 /* From Linux kernel code */
1190 #define ATTR_MODE (1 << 0)
1191 #define ATTR_UID (1 << 1)
1192 #define ATTR_GID (1 << 2)
1193 #define ATTR_SIZE (1 << 3)
1194 #define ATTR_ATIME (1 << 4)
1195 #define ATTR_MTIME (1 << 5)
1196 #define ATTR_CTIME (1 << 6)
1197 #define ATTR_MASK 127
1198 #define ATTR_ATIME_SET (1 << 7)
1199 #define ATTR_MTIME_SET (1 << 8)
1201 static void v9fs_setattr(void *opaque
)
1208 V9fsPDU
*pdu
= opaque
;
1209 V9fsState
*s
= pdu
->s
;
1211 pdu_unmarshal(pdu
, offset
, "dI", &fid
, &v9iattr
);
1213 fidp
= lookup_fid(s
, fid
);
1218 if (v9iattr
.valid
& ATTR_MODE
) {
1219 err
= v9fs_co_chmod(s
, &fidp
->path
, v9iattr
.mode
);
1224 if (v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1225 struct timespec times
[2];
1226 if (v9iattr
.valid
& ATTR_ATIME
) {
1227 if (v9iattr
.valid
& ATTR_ATIME_SET
) {
1228 times
[0].tv_sec
= v9iattr
.atime_sec
;
1229 times
[0].tv_nsec
= v9iattr
.atime_nsec
;
1231 times
[0].tv_nsec
= UTIME_NOW
;
1234 times
[0].tv_nsec
= UTIME_OMIT
;
1236 if (v9iattr
.valid
& ATTR_MTIME
) {
1237 if (v9iattr
.valid
& ATTR_MTIME_SET
) {
1238 times
[1].tv_sec
= v9iattr
.mtime_sec
;
1239 times
[1].tv_nsec
= v9iattr
.mtime_nsec
;
1241 times
[1].tv_nsec
= UTIME_NOW
;
1244 times
[1].tv_nsec
= UTIME_OMIT
;
1246 err
= v9fs_co_utimensat(s
, &fidp
->path
, times
);
1252 * If the only valid entry in iattr is ctime we can call
1253 * chown(-1,-1) to update the ctime of the file
1255 if ((v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1256 ((v9iattr
.valid
& ATTR_CTIME
)
1257 && !((v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1258 if (!(v9iattr
.valid
& ATTR_UID
)) {
1261 if (!(v9iattr
.valid
& ATTR_GID
)) {
1264 err
= v9fs_co_chown(s
, &fidp
->path
, v9iattr
.uid
,
1270 if (v9iattr
.valid
& (ATTR_SIZE
)) {
1271 err
= v9fs_co_truncate(s
, &fidp
->path
, v9iattr
.size
);
1278 complete_pdu(s
, pdu
, err
);
1281 static int v9fs_walk_marshal(V9fsPDU
*pdu
, uint16_t nwnames
, V9fsQID
*qids
)
1285 offset
+= pdu_marshal(pdu
, offset
, "w", nwnames
);
1286 for (i
= 0; i
< nwnames
; i
++) {
1287 offset
+= pdu_marshal(pdu
, offset
, "Q", &qids
[i
]);
1292 static void v9fs_walk(void *opaque
)
1295 V9fsQID
*qids
= NULL
;
1301 int32_t fid
, newfid
;
1302 V9fsString
*wnames
= NULL
;
1304 V9fsFidState
*newfidp
;
1305 V9fsPDU
*pdu
= opaque
;
1306 V9fsState
*s
= pdu
->s
;
1308 offset
+= pdu_unmarshal(pdu
, offset
, "ddw", &fid
,
1311 if (nwnames
&& nwnames
<= P9_MAXWELEM
) {
1312 wnames
= g_malloc0(sizeof(wnames
[0]) * nwnames
);
1313 qids
= g_malloc0(sizeof(qids
[0]) * nwnames
);
1314 for (i
= 0; i
< nwnames
; i
++) {
1315 offset
+= pdu_unmarshal(pdu
, offset
, "s", &wnames
[i
]);
1318 } else if (nwnames
> P9_MAXWELEM
) {
1322 fidp
= lookup_fid(s
, fid
);
1327 if (fid
== newfid
) {
1328 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
1329 v9fs_string_init(&path
);
1330 for (name_idx
= 0; name_idx
< nwnames
; name_idx
++) {
1331 v9fs_string_sprintf(&path
, "%s/%s",
1332 fidp
->path
.data
, wnames
[name_idx
].data
);
1333 v9fs_string_copy(&fidp
->path
, &path
);
1335 err
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1337 v9fs_string_free(&path
);
1340 stat_to_qid(&stbuf
, &qids
[name_idx
]);
1342 v9fs_string_free(&path
);
1344 newfidp
= alloc_fid(s
, newfid
);
1345 if (newfidp
== NULL
) {
1349 newfidp
->uid
= fidp
->uid
;
1350 v9fs_string_init(&path
);
1351 v9fs_string_copy(&newfidp
->path
, &fidp
->path
);
1352 for (name_idx
= 0; name_idx
< nwnames
; name_idx
++) {
1353 v9fs_string_sprintf(&path
, "%s/%s", newfidp
->path
.data
,
1354 wnames
[name_idx
].data
);
1355 v9fs_string_copy(&newfidp
->path
, &path
);
1356 err
= v9fs_co_lstat(s
, &newfidp
->path
, &stbuf
);
1358 free_fid(s
, newfidp
->fid
);
1359 v9fs_string_free(&path
);
1362 stat_to_qid(&stbuf
, &qids
[name_idx
]);
1364 v9fs_string_free(&path
);
1366 err
= v9fs_walk_marshal(pdu
, nwnames
, qids
);
1368 complete_pdu(s
, pdu
, err
);
1369 if (nwnames
&& nwnames
<= P9_MAXWELEM
) {
1370 for (name_idx
= 0; name_idx
< nwnames
; name_idx
++) {
1371 v9fs_string_free(&wnames
[name_idx
]);
1378 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1380 struct statfs stbuf
;
1384 * iounit should be multiples of f_bsize (host filesystem block size
1385 * and as well as less than (client msize - P9_IOHDRSZ))
1387 if (!v9fs_co_statfs(s
, name
, &stbuf
)) {
1388 iounit
= stbuf
.f_bsize
;
1389 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1392 iounit
= s
->msize
- P9_IOHDRSZ
;
1397 static void v9fs_open(void *opaque
)
1408 V9fsPDU
*pdu
= opaque
;
1409 V9fsState
*s
= pdu
->s
;
1411 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1412 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &mode
);
1414 pdu_unmarshal(pdu
, offset
, "db", &fid
, &mode
);
1416 fidp
= lookup_fid(s
, fid
);
1421 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
1423 err
= v9fs_co_lstat(s
, &fidp
->path
, &stbuf
);
1427 stat_to_qid(&stbuf
, &qid
);
1428 if (S_ISDIR(stbuf
.st_mode
)) {
1429 err
= v9fs_co_opendir(s
, fidp
);
1433 fidp
->fid_type
= P9_FID_DIR
;
1434 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, 0);
1437 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1439 flags
&= ~(O_NOCTTY
| O_ASYNC
| O_CREAT
);
1440 /* Ignore direct disk access hint until the server supports it. */
1443 flags
= omode_to_uflags(mode
);
1445 err
= v9fs_co_open(s
, fidp
, flags
);
1449 fidp
->fid_type
= P9_FID_FILE
;
1450 iounit
= get_iounit(s
, &fidp
->path
);
1451 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
1455 complete_pdu(s
, pdu
, err
);
1458 static void v9fs_lcreate(void *opaque
)
1460 int32_t dfid
, flags
, mode
;
1464 V9fsString fullname
;
1470 V9fsPDU
*pdu
= opaque
;
1472 v9fs_string_init(&fullname
);
1473 pdu_unmarshal(pdu
, offset
, "dsddd", &dfid
, &name
, &flags
,
1476 fidp
= lookup_fid(pdu
->s
, dfid
);
1481 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
1483 /* Ignore direct disk access hint until the server supports it. */
1486 err
= v9fs_co_open2(pdu
->s
, fidp
, fullname
.data
, gid
, flags
, mode
);
1490 fidp
->fid_type
= P9_FID_FILE
;
1491 iounit
= get_iounit(pdu
->s
, &fullname
);
1493 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
1495 fidp
->fid_type
= P9_FID_NONE
;
1496 if (fidp
->fs
.fd
> 0) {
1501 v9fs_string_copy(&fidp
->path
, &fullname
);
1502 stat_to_qid(&stbuf
, &qid
);
1503 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
1506 complete_pdu(pdu
->s
, pdu
, err
);
1507 v9fs_string_free(&name
);
1508 v9fs_string_free(&fullname
);
1511 static void v9fs_fsync(void *opaque
)
1518 V9fsPDU
*pdu
= opaque
;
1519 V9fsState
*s
= pdu
->s
;
1521 pdu_unmarshal(pdu
, offset
, "dd", &fid
, &datasync
);
1522 fidp
= lookup_fid(s
, fid
);
1527 err
= v9fs_co_fsync(s
, fidp
, datasync
);
1532 complete_pdu(s
, pdu
, err
);
1535 static void v9fs_clunk(void *opaque
)
1540 V9fsPDU
*pdu
= opaque
;
1541 V9fsState
*s
= pdu
->s
;
1543 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1544 err
= free_fid(s
, fid
);
1550 complete_pdu(s
, pdu
, err
);
1553 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1555 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1560 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1561 vs
->offset
+= vs
->count
;
1564 complete_pdu(s
, vs
->pdu
, err
);
1565 v9fs_stat_free(&vs
->v9stat
);
1566 v9fs_string_free(&vs
->name
);
1571 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1578 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1583 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1585 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1586 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1587 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1588 v9fs_read_post_seekdir(s
, vs
, err
);
1591 vs
->count
+= vs
->len
;
1592 v9fs_stat_free(&vs
->v9stat
);
1593 v9fs_string_free(&vs
->name
);
1594 vs
->dir_pos
= vs
->dent
->d_off
;
1595 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1596 v9fs_read_post_readdir(s
, vs
, err
);
1599 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1600 v9fs_read_post_seekdir(s
, vs
, err
);
1605 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1608 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1609 v9fs_string_init(&vs
->name
);
1610 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1612 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1613 v9fs_read_post_dir_lstat(s
, vs
, err
);
1617 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1618 vs
->offset
+= vs
->count
;
1620 complete_pdu(s
, vs
->pdu
, err
);
1625 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1627 v9fs_co_readdir(s
, vs
->fidp
, &vs
->dent
);
1628 v9fs_read_post_readdir(s
, vs
, err
);
1632 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1635 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
1636 v9fs_read_post_telldir(s
, vs
, err
);
1640 static void v9fs_read_post_preadv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1643 /* IO error return the error */
1647 vs
->total
+= vs
->len
;
1648 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1649 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1652 print_sg(vs
->sg
, vs
->cnt
);
1654 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1659 } while (vs
->len
== -1 && errno
== EINTR
);
1660 if (vs
->len
== -1) {
1663 v9fs_read_post_preadv(s
, vs
, err
);
1666 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1667 vs
->offset
+= vs
->count
;
1671 complete_pdu(s
, vs
->pdu
, err
);
1675 static void v9fs_xattr_read(V9fsState
*s
, V9fsReadState
*vs
)
1681 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
1682 read_count
= xattr_len
- vs
->off
;
1683 if (read_count
> vs
->count
) {
1684 read_count
= vs
->count
;
1685 } else if (read_count
< 0) {
1687 * read beyond XATTR value
1691 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", read_count
);
1692 vs
->offset
+= pdu_pack(vs
->pdu
, vs
->offset
,
1693 ((char *)vs
->fidp
->fs
.xattr
.value
) + vs
->off
,
1696 complete_pdu(s
, vs
->pdu
, err
);
1700 static void v9fs_read(void *opaque
)
1702 V9fsPDU
*pdu
= opaque
;
1703 V9fsState
*s
= pdu
->s
;
1708 vs
= g_malloc(sizeof(*vs
));
1715 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1717 vs
->fidp
= lookup_fid(s
, fid
);
1718 if (vs
->fidp
== NULL
) {
1723 if (vs
->fidp
->fid_type
== P9_FID_DIR
) {
1724 vs
->max_count
= vs
->count
;
1727 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
1729 v9fs_read_post_rewinddir(s
, vs
, err
);
1731 } else if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
1733 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
1734 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1735 if (vs
->total
<= vs
->count
) {
1736 vs
->len
= v9fs_do_preadv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1742 v9fs_read_post_preadv(s
, vs
, err
);
1745 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
1746 v9fs_xattr_read(s
, vs
);
1752 complete_pdu(s
, pdu
, err
);
1756 static size_t v9fs_readdir_data_size(V9fsString
*name
)
1759 * Size of each dirent on the wire: size of qid (13) + size of offset (8)
1760 * size of type (1) + size of name.size (2) + strlen(name.data)
1762 return 24 + v9fs_string_size(name
);
1765 static int v9fs_do_readdir(V9fsState
*s
, V9fsPDU
*pdu
,
1766 V9fsFidState
*fidp
, int32_t max_count
)
1773 off_t saved_dir_pos
;
1774 struct dirent
*dent
;
1776 /* save the directory position */
1777 saved_dir_pos
= v9fs_co_telldir(s
, fidp
);
1778 if (saved_dir_pos
< 0) {
1779 return saved_dir_pos
;
1782 err
= v9fs_co_readdir(s
, fidp
, &dent
);
1786 v9fs_string_init(&name
);
1787 v9fs_string_sprintf(&name
, "%s", dent
->d_name
);
1788 if ((count
+ v9fs_readdir_data_size(&name
)) > max_count
) {
1789 /* Ran out of buffer. Set dir back to old position and return */
1790 v9fs_co_seekdir(s
, fidp
, saved_dir_pos
);
1791 v9fs_string_free(&name
);
1795 * Fill up just the path field of qid because the client uses
1796 * only that. To fill the entire qid structure we will have
1797 * to stat each dirent found, which is expensive
1799 size
= MIN(sizeof(dent
->d_ino
), sizeof(qid
.path
));
1800 memcpy(&qid
.path
, &dent
->d_ino
, size
);
1801 /* Fill the other fields with dummy values */
1805 /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
1806 len
= pdu_marshal(pdu
, 11 + count
, "Qqbs",
1808 dent
->d_type
, &name
);
1810 v9fs_string_free(&name
);
1811 saved_dir_pos
= dent
->d_off
;
1819 static void v9fs_readdir(void *opaque
)
1825 int64_t initial_offset
;
1826 int32_t count
, max_count
;
1827 V9fsPDU
*pdu
= opaque
;
1828 V9fsState
*s
= pdu
->s
;
1830 pdu_unmarshal(pdu
, offset
, "dqd", &fid
, &initial_offset
, &max_count
);
1832 fidp
= lookup_fid(s
, fid
);
1833 if (fidp
== NULL
|| !fidp
->fs
.dir
) {
1837 if (initial_offset
== 0) {
1838 v9fs_co_rewinddir(s
, fidp
);
1840 v9fs_co_seekdir(s
, fidp
, initial_offset
);
1842 count
= v9fs_do_readdir(s
, pdu
, fidp
, max_count
);
1848 retval
+= pdu_marshal(pdu
, offset
, "d", count
);
1851 complete_pdu(s
, pdu
, retval
);
1854 static void v9fs_write_post_pwritev(V9fsState
*s
, V9fsWriteState
*vs
,
1858 /* IO error return the error */
1862 vs
->total
+= vs
->len
;
1863 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1864 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1867 print_sg(vs
->sg
, vs
->cnt
);
1869 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
,
1874 } while (vs
->len
== -1 && errno
== EINTR
);
1875 if (vs
->len
== -1) {
1878 v9fs_write_post_pwritev(s
, vs
, err
);
1881 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1884 complete_pdu(s
, vs
->pdu
, err
);
1888 static void v9fs_xattr_write(V9fsState
*s
, V9fsWriteState
*vs
)
1895 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
1896 write_count
= xattr_len
- vs
->off
;
1897 if (write_count
> vs
->count
) {
1898 write_count
= vs
->count
;
1899 } else if (write_count
< 0) {
1901 * write beyond XATTR value len specified in
1907 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", write_count
);
1909 vs
->fidp
->fs
.xattr
.copied_len
+= write_count
;
1911 * Now copy the content from sg list
1913 for (i
= 0; i
< vs
->cnt
; i
++) {
1914 if (write_count
> vs
->sg
[i
].iov_len
) {
1915 to_copy
= vs
->sg
[i
].iov_len
;
1917 to_copy
= write_count
;
1919 memcpy((char *)vs
->fidp
->fs
.xattr
.value
+ vs
->off
,
1920 vs
->sg
[i
].iov_base
, to_copy
);
1921 /* updating vs->off since we are not using below */
1923 write_count
-= to_copy
;
1926 complete_pdu(s
, vs
->pdu
, err
);
1930 static void v9fs_write(void *opaque
)
1932 V9fsPDU
*pdu
= opaque
;
1933 V9fsState
*s
= pdu
->s
;
1938 vs
= g_malloc(sizeof(*vs
));
1946 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
1949 vs
->fidp
= lookup_fid(s
, fid
);
1950 if (vs
->fidp
== NULL
) {
1955 if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
1956 if (vs
->fidp
->fs
.fd
== -1) {
1960 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
1962 * setxattr operation
1964 v9fs_xattr_write(s
, vs
);
1970 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1971 if (vs
->total
<= vs
->count
) {
1972 vs
->len
= v9fs_do_pwritev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
, vs
->off
);
1977 v9fs_write_post_pwritev(s
, vs
, err
);
1981 complete_pdu(s
, vs
->pdu
, err
);
1985 static void v9fs_create(void *opaque
)
1996 V9fsString extension
;
1997 V9fsString fullname
;
1999 V9fsPDU
*pdu
= opaque
;
2001 v9fs_string_init(&fullname
);
2003 pdu_unmarshal(pdu
, offset
, "dsdbs", &fid
, &name
,
2004 &perm
, &mode
, &extension
);
2006 fidp
= lookup_fid(pdu
->s
, fid
);
2012 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
2013 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
2017 } else if (err
!= -ENOENT
) {
2020 if (perm
& P9_STAT_MODE_DIR
) {
2021 err
= v9fs_co_mkdir(pdu
->s
, fullname
.data
, perm
& 0777,
2026 err
= v9fs_co_opendir(pdu
->s
, fidp
);
2030 fidp
->fid_type
= P9_FID_DIR
;
2031 } else if (perm
& P9_STAT_MODE_SYMLINK
) {
2032 err
= v9fs_do_symlink(pdu
->s
, fidp
, extension
.data
,
2038 } else if (perm
& P9_STAT_MODE_LINK
) {
2039 int32_t nfid
= atoi(extension
.data
);
2040 V9fsFidState
*nfidp
= lookup_fid(pdu
->s
, nfid
);
2041 if (nfidp
== NULL
) {
2045 err
= v9fs_do_link(pdu
->s
, &nfidp
->path
, &fullname
);
2050 } else if (perm
& P9_STAT_MODE_DEVICE
) {
2052 uint32_t major
, minor
;
2055 if (sscanf(extension
.data
, "%c %u %u", &ctype
, &major
, &minor
) != 3) {
2072 nmode
|= perm
& 0777;
2073 err
= v9fs_co_mknod(pdu
->s
, &fullname
, fidp
->uid
, -1,
2074 makedev(major
, minor
), nmode
);
2078 } else if (perm
& P9_STAT_MODE_NAMED_PIPE
) {
2079 err
= v9fs_co_mknod(pdu
->s
, &fullname
, fidp
->uid
, -1,
2080 0, S_IFIFO
| (perm
& 0777));
2084 } else if (perm
& P9_STAT_MODE_SOCKET
) {
2085 err
= v9fs_co_mknod(pdu
->s
, &fullname
, fidp
->uid
, -1,
2086 0, S_IFSOCK
| (perm
& 0777));
2091 err
= v9fs_co_open2(pdu
->s
, fidp
, fullname
.data
, -1,
2092 omode_to_uflags(mode
)|O_CREAT
, perm
);
2096 fidp
->fid_type
= P9_FID_FILE
;
2098 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
2100 fidp
->fid_type
= P9_FID_NONE
;
2106 iounit
= get_iounit(pdu
->s
, &fidp
->path
);
2107 v9fs_string_copy(&fidp
->path
, &fullname
);
2108 stat_to_qid(&stbuf
, &qid
);
2109 offset
+= pdu_marshal(pdu
, offset
, "Qd", &qid
, iounit
);
2112 complete_pdu(pdu
->s
, pdu
, err
);
2113 v9fs_string_free(&name
);
2114 v9fs_string_free(&extension
);
2115 v9fs_string_free(&fullname
);
2118 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2121 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2122 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2127 complete_pdu(s
, vs
->pdu
, err
);
2128 v9fs_string_free(&vs
->name
);
2129 v9fs_string_free(&vs
->symname
);
2130 v9fs_string_free(&vs
->fullname
);
2134 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2140 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2142 v9fs_post_symlink(s
, vs
, err
);
2145 static void v9fs_symlink(void *opaque
)
2147 V9fsPDU
*pdu
= opaque
;
2148 V9fsState
*s
= pdu
->s
;
2150 V9fsSymlinkState
*vs
;
2154 vs
= g_malloc(sizeof(*vs
));
2158 v9fs_string_init(&vs
->fullname
);
2160 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2161 &vs
->symname
, &gid
);
2163 vs
->dfidp
= lookup_fid(s
, dfid
);
2164 if (vs
->dfidp
== NULL
) {
2169 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2171 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2172 vs
->fullname
.data
, gid
);
2173 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2177 complete_pdu(s
, vs
->pdu
, err
);
2178 v9fs_string_free(&vs
->name
);
2179 v9fs_string_free(&vs
->symname
);
2183 static void v9fs_flush(void *opaque
)
2185 V9fsPDU
*pdu
= opaque
;
2186 V9fsState
*s
= pdu
->s
;
2187 /* A nop call with no return */
2188 complete_pdu(s
, pdu
, 7);
2192 static void v9fs_link(void *opaque
)
2194 V9fsPDU
*pdu
= opaque
;
2195 V9fsState
*s
= pdu
->s
;
2196 int32_t dfid
, oldfid
;
2197 V9fsFidState
*dfidp
, *oldfidp
;
2198 V9fsString name
, fullname
;
2202 v9fs_string_init(&fullname
);
2204 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2206 dfidp
= lookup_fid(s
, dfid
);
2207 if (dfidp
== NULL
) {
2212 oldfidp
= lookup_fid(s
, oldfid
);
2213 if (oldfidp
== NULL
) {
2218 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2220 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2224 v9fs_string_free(&fullname
);
2227 v9fs_string_free(&name
);
2228 complete_pdu(s
, pdu
, err
);
2231 static void v9fs_remove(void *opaque
)
2237 V9fsPDU
*pdu
= opaque
;
2239 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2241 fidp
= lookup_fid(pdu
->s
, fid
);
2246 err
= v9fs_co_remove(pdu
->s
, &fidp
->path
);
2251 /* For TREMOVE we need to clunk the fid even on failed remove */
2252 free_fid(pdu
->s
, fidp
->fid
);
2254 complete_pdu(pdu
->s
, pdu
, err
);
2257 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2266 v9fs_stat_free(&vs
->v9stat
);
2267 complete_pdu(s
, vs
->pdu
, err
);
2271 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2276 if (vs
->v9stat
.length
!= -1) {
2277 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2281 v9fs_wstat_post_truncate(s
, vs
, err
);
2285 v9fs_stat_free(&vs
->v9stat
);
2286 complete_pdu(s
, vs
->pdu
, err
);
2290 static int v9fs_complete_rename(V9fsState
*s
, V9fsFidState
*fidp
,
2291 int32_t newdirfid
, V9fsString
*name
)
2295 char *old_name
, *new_name
;
2297 if (newdirfid
!= -1) {
2298 V9fsFidState
*dirfidp
;
2299 dirfidp
= lookup_fid(s
, newdirfid
);
2300 if (dirfidp
== NULL
) {
2304 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2306 new_name
= g_malloc0(dirfidp
->path
.size
+ name
->size
+ 2);
2308 strcpy(new_name
, dirfidp
->path
.data
);
2309 strcat(new_name
, "/");
2310 strcat(new_name
+ dirfidp
->path
.size
, name
->data
);
2312 old_name
= fidp
->path
.data
;
2313 end
= strrchr(old_name
, '/');
2319 new_name
= g_malloc0(end
- old_name
+ name
->size
+ 1);
2321 strncat(new_name
, old_name
, end
- old_name
);
2322 strncat(new_name
+ (end
- old_name
), name
->data
, name
->size
);
2325 v9fs_string_free(name
);
2326 name
->data
= new_name
;
2327 name
->size
= strlen(new_name
);
2329 if (strcmp(new_name
, fidp
->path
.data
) != 0) {
2330 err
= v9fs_co_rename(s
, &fidp
->path
, name
);
2334 V9fsFidState
*tfidp
;
2336 * Fixup fid's pointing to the old name to
2337 * start pointing to the new name
2339 for (tfidp
= s
->fid_list
; tfidp
; tfidp
= tfidp
->next
) {
2340 if (fidp
== tfidp
) {
2342 * we replace name of this fid towards the end
2343 * so that our below strcmp will work
2347 if (v9fs_path_is_ancestor(&fidp
->path
, &tfidp
->path
)) {
2348 /* replace the name */
2349 v9fs_fix_path(&tfidp
->path
, name
, strlen(fidp
->path
.data
));
2352 v9fs_string_copy(&fidp
->path
, name
);
2358 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2364 if (vs
->v9stat
.name
.size
!= 0) {
2365 err
= v9fs_complete_rename(s
, vs
->fidp
, -1, &vs
->v9stat
.name
);
2367 v9fs_wstat_post_rename(s
, vs
, err
);
2371 v9fs_stat_free(&vs
->v9stat
);
2372 complete_pdu(s
, vs
->pdu
, err
);
2376 static void v9fs_rename(void *opaque
)
2384 V9fsPDU
*pdu
= opaque
;
2385 V9fsState
*s
= pdu
->s
;
2387 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newdirfid
, &name
);
2389 fidp
= lookup_fid(s
, fid
);
2394 BUG_ON(fidp
->fid_type
!= P9_FID_NONE
);
2396 err
= v9fs_complete_rename(s
, fidp
, newdirfid
, &name
);
2401 complete_pdu(s
, pdu
, err
);
2402 v9fs_string_free(&name
);
2405 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2411 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2412 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2413 vs
->v9stat
.n_gid
)) {
2417 v9fs_wstat_post_chown(s
, vs
, err
);
2421 v9fs_stat_free(&vs
->v9stat
);
2422 complete_pdu(s
, vs
->pdu
, err
);
2426 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2432 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2433 struct timespec times
[2];
2434 if (vs
->v9stat
.atime
!= -1) {
2435 times
[0].tv_sec
= vs
->v9stat
.atime
;
2436 times
[0].tv_nsec
= 0;
2438 times
[0].tv_nsec
= UTIME_OMIT
;
2440 if (vs
->v9stat
.mtime
!= -1) {
2441 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2442 times
[1].tv_nsec
= 0;
2444 times
[1].tv_nsec
= UTIME_OMIT
;
2447 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2452 v9fs_wstat_post_utime(s
, vs
, err
);
2456 v9fs_stat_free(&vs
->v9stat
);
2457 complete_pdu(s
, vs
->pdu
, err
);
2461 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2466 v9fs_stat_free(&vs
->v9stat
);
2467 complete_pdu(s
, vs
->pdu
, err
);
2471 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2480 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2482 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2483 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2484 /* Attempting to change the type */
2489 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2490 &vs
->v9stat
.extension
))) {
2493 v9fs_wstat_post_chmod(s
, vs
, err
);
2497 v9fs_stat_free(&vs
->v9stat
);
2498 complete_pdu(s
, vs
->pdu
, err
);
2502 static void v9fs_wstat(void *opaque
)
2504 V9fsPDU
*pdu
= opaque
;
2505 V9fsState
*s
= pdu
->s
;
2510 vs
= g_malloc(sizeof(*vs
));
2514 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2516 vs
->fidp
= lookup_fid(s
, fid
);
2517 if (vs
->fidp
== NULL
) {
2522 /* do we need to sync the file? */
2523 if (donttouch_stat(&vs
->v9stat
)) {
2524 err
= v9fs_do_fsync(s
, vs
->fidp
->fs
.fd
, 0);
2525 v9fs_wstat_post_fsync(s
, vs
, err
);
2529 if (vs
->v9stat
.mode
!= -1) {
2530 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2531 v9fs_wstat_post_lstat(s
, vs
, err
);
2535 v9fs_wstat_post_chmod(s
, vs
, err
);
2539 v9fs_stat_free(&vs
->v9stat
);
2540 complete_pdu(s
, vs
->pdu
, err
);
2544 static int v9fs_fill_statfs(V9fsState
*s
, V9fsPDU
*pdu
, struct statfs
*stbuf
)
2556 int32_t bsize_factor
;
2559 * compute bsize factor based on host file system block size
2562 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/stbuf
->f_bsize
;
2563 if (!bsize_factor
) {
2566 f_type
= stbuf
->f_type
;
2567 f_bsize
= stbuf
->f_bsize
;
2568 f_bsize
*= bsize_factor
;
2570 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2571 * adjust(divide) the number of blocks, free blocks and available
2572 * blocks by bsize factor
2574 f_blocks
= stbuf
->f_blocks
/bsize_factor
;
2575 f_bfree
= stbuf
->f_bfree
/bsize_factor
;
2576 f_bavail
= stbuf
->f_bavail
/bsize_factor
;
2577 f_files
= stbuf
->f_files
;
2578 f_ffree
= stbuf
->f_ffree
;
2579 fsid_val
= (unsigned int) stbuf
->f_fsid
.__val
[0] |
2580 (unsigned long long)stbuf
->f_fsid
.__val
[1] << 32;
2581 f_namelen
= stbuf
->f_namelen
;
2583 return pdu_marshal(pdu
, offset
, "ddqqqqqqd",
2584 f_type
, f_bsize
, f_blocks
, f_bfree
,
2585 f_bavail
, f_files
, f_ffree
,
2586 fsid_val
, f_namelen
);
2589 static void v9fs_statfs(void *opaque
)
2595 struct statfs stbuf
;
2596 V9fsPDU
*pdu
= opaque
;
2597 V9fsState
*s
= pdu
->s
;
2599 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2600 fidp
= lookup_fid(s
, fid
);
2605 retval
= v9fs_co_statfs(s
, &fidp
->path
, &stbuf
);
2610 retval
+= v9fs_fill_statfs(s
, pdu
, &stbuf
);
2612 complete_pdu(s
, pdu
, retval
);
2616 static void v9fs_mknod(void *opaque
)
2628 V9fsString fullname
;
2630 V9fsPDU
*pdu
= opaque
;
2631 V9fsState
*s
= pdu
->s
;
2633 v9fs_string_init(&fullname
);
2634 pdu_unmarshal(pdu
, offset
, "dsdddd", &fid
, &name
, &mode
,
2635 &major
, &minor
, &gid
);
2637 fidp
= lookup_fid(s
, fid
);
2642 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
2643 err
= v9fs_co_mknod(s
, &fullname
, fidp
->uid
, gid
,
2644 makedev(major
, minor
), mode
);
2648 err
= v9fs_co_lstat(s
, &fullname
, &stbuf
);
2652 stat_to_qid(&stbuf
, &qid
);
2654 err
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2656 complete_pdu(s
, pdu
, err
);
2657 v9fs_string_free(&fullname
);
2658 v9fs_string_free(&name
);
2662 * Implement posix byte range locking code
2663 * Server side handling of locking code is very simple, because 9p server in
2664 * QEMU can handle only one client. And most of the lock handling
2665 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
2666 * do any thing in * qemu 9p server side lock code path.
2667 * So when a TLOCK request comes, always return success
2669 static void v9fs_lock(void *opaque
)
2676 int32_t fid
, err
= 0;
2677 V9fsPDU
*pdu
= opaque
;
2678 V9fsState
*s
= pdu
->s
;
2680 flock
= g_malloc(sizeof(*flock
));
2681 pdu_unmarshal(pdu
, offset
, "dbdqqds", &fid
, &flock
->type
,
2682 &flock
->flags
, &flock
->start
, &flock
->length
,
2683 &flock
->proc_id
, &flock
->client_id
);
2684 status
= P9_LOCK_ERROR
;
2686 /* We support only block flag now (that too ignored currently) */
2687 if (flock
->flags
& ~P9_LOCK_FLAGS_BLOCK
) {
2691 fidp
= lookup_fid(s
, fid
);
2696 err
= v9fs_co_fstat(s
, fidp
->fs
.fd
, &stbuf
);
2700 status
= P9_LOCK_SUCCESS
;
2703 err
+= pdu_marshal(pdu
, offset
, "b", status
);
2704 complete_pdu(s
, pdu
, err
);
2709 * When a TGETLOCK request comes, always return success because all lock
2710 * handling is done by client's VFS layer.
2712 static void v9fs_getlock(void *opaque
)
2718 int32_t fid
, err
= 0;
2719 V9fsPDU
*pdu
= opaque
;
2720 V9fsState
*s
= pdu
->s
;
2722 glock
= g_malloc(sizeof(*glock
));
2723 pdu_unmarshal(pdu
, offset
, "dbqqds", &fid
, &glock
->type
,
2724 &glock
->start
, &glock
->length
, &glock
->proc_id
,
2727 fidp
= lookup_fid(s
, fid
);
2732 err
= v9fs_co_fstat(s
, fidp
->fs
.fd
, &stbuf
);
2736 glock
->type
= F_UNLCK
;
2737 offset
+= pdu_marshal(pdu
, offset
, "bqqds", glock
->type
,
2738 glock
->start
, glock
->length
, glock
->proc_id
,
2742 complete_pdu(s
, pdu
, err
);
2746 static void v9fs_mkdir(void *opaque
)
2748 V9fsPDU
*pdu
= opaque
;
2752 V9fsString name
, fullname
;
2759 v9fs_string_init(&fullname
);
2760 pdu_unmarshal(pdu
, offset
, "dsdd", &fid
, &name
, &mode
, &gid
);
2762 fidp
= lookup_fid(pdu
->s
, fid
);
2767 v9fs_string_sprintf(&fullname
, "%s/%s", fidp
->path
.data
, name
.data
);
2768 err
= v9fs_co_mkdir(pdu
->s
, fullname
.data
, mode
, fidp
->uid
, gid
);
2772 err
= v9fs_co_lstat(pdu
->s
, &fullname
, &stbuf
);
2776 stat_to_qid(&stbuf
, &qid
);
2777 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
2780 complete_pdu(pdu
->s
, pdu
, err
);
2781 v9fs_string_free(&fullname
);
2782 v9fs_string_free(&name
);
2785 static void v9fs_xattrwalk(void *opaque
)
2791 int32_t fid
, newfid
;
2792 V9fsFidState
*file_fidp
;
2793 V9fsFidState
*xattr_fidp
;
2794 V9fsPDU
*pdu
= opaque
;
2795 V9fsState
*s
= pdu
->s
;
2797 pdu_unmarshal(pdu
, offset
, "dds", &fid
, &newfid
, &name
);
2798 file_fidp
= lookup_fid(s
, fid
);
2799 if (file_fidp
== NULL
) {
2803 xattr_fidp
= alloc_fid(s
, newfid
);
2804 if (xattr_fidp
== NULL
) {
2808 v9fs_string_copy(&xattr_fidp
->path
, &file_fidp
->path
);
2809 if (name
.data
[0] == 0) {
2811 * listxattr request. Get the size first
2813 size
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
, NULL
, 0);
2816 free_fid(s
, xattr_fidp
->fid
);
2820 * Read the xattr value
2822 xattr_fidp
->fs
.xattr
.len
= size
;
2823 xattr_fidp
->fid_type
= P9_FID_XATTR
;
2824 xattr_fidp
->fs
.xattr
.copied_len
= -1;
2826 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
2827 err
= v9fs_co_llistxattr(s
, &xattr_fidp
->path
,
2828 xattr_fidp
->fs
.xattr
.value
,
2829 xattr_fidp
->fs
.xattr
.len
);
2831 free_fid(s
, xattr_fidp
->fid
);
2835 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
2839 * specific xattr fid. We check for xattr
2840 * presence also collect the xattr size
2842 size
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
2846 free_fid(s
, xattr_fidp
->fid
);
2850 * Read the xattr value
2852 xattr_fidp
->fs
.xattr
.len
= size
;
2853 xattr_fidp
->fid_type
= P9_FID_XATTR
;
2854 xattr_fidp
->fs
.xattr
.copied_len
= -1;
2856 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
2857 err
= v9fs_co_lgetxattr(s
, &xattr_fidp
->path
,
2858 &name
, xattr_fidp
->fs
.xattr
.value
,
2859 xattr_fidp
->fs
.xattr
.len
);
2861 free_fid(s
, xattr_fidp
->fid
);
2865 offset
+= pdu_marshal(pdu
, offset
, "q", size
);
2869 complete_pdu(s
, pdu
, err
);
2870 v9fs_string_free(&name
);
2873 static void v9fs_xattrcreate(void *opaque
)
2881 V9fsFidState
*file_fidp
;
2882 V9fsFidState
*xattr_fidp
;
2883 V9fsPDU
*pdu
= opaque
;
2884 V9fsState
*s
= pdu
->s
;
2886 pdu_unmarshal(pdu
, offset
, "dsqd",
2887 &fid
, &name
, &size
, &flags
);
2889 file_fidp
= lookup_fid(s
, fid
);
2890 if (file_fidp
== NULL
) {
2894 /* Make the file fid point to xattr */
2895 xattr_fidp
= file_fidp
;
2896 xattr_fidp
->fid_type
= P9_FID_XATTR
;
2897 xattr_fidp
->fs
.xattr
.copied_len
= 0;
2898 xattr_fidp
->fs
.xattr
.len
= size
;
2899 xattr_fidp
->fs
.xattr
.flags
= flags
;
2900 v9fs_string_init(&xattr_fidp
->fs
.xattr
.name
);
2901 v9fs_string_copy(&xattr_fidp
->fs
.xattr
.name
, &name
);
2903 xattr_fidp
->fs
.xattr
.value
= g_malloc(size
);
2905 xattr_fidp
->fs
.xattr
.value
= NULL
;
2909 complete_pdu(s
, pdu
, err
);
2910 v9fs_string_free(&name
);
2913 static void v9fs_readlink(void *opaque
)
2915 V9fsPDU
*pdu
= opaque
;
2922 pdu_unmarshal(pdu
, offset
, "d", &fid
);
2923 fidp
= lookup_fid(pdu
->s
, fid
);
2929 v9fs_string_init(&target
);
2930 err
= v9fs_co_readlink(pdu
->s
, &fidp
->path
, &target
);
2934 offset
+= pdu_marshal(pdu
, offset
, "s", &target
);
2936 v9fs_string_free(&target
);
2938 complete_pdu(pdu
->s
, pdu
, err
);
2941 static CoroutineEntry
*pdu_co_handlers
[] = {
2942 [P9_TREADDIR
] = v9fs_readdir
,
2943 [P9_TSTATFS
] = v9fs_statfs
,
2944 [P9_TGETATTR
] = v9fs_getattr
,
2945 [P9_TSETATTR
] = v9fs_setattr
,
2946 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
2947 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
2948 [P9_TMKNOD
] = v9fs_mknod
,
2949 [P9_TRENAME
] = v9fs_rename
,
2950 [P9_TLOCK
] = v9fs_lock
,
2951 [P9_TGETLOCK
] = v9fs_getlock
,
2952 [P9_TREADLINK
] = v9fs_readlink
,
2953 [P9_TMKDIR
] = v9fs_mkdir
,
2954 [P9_TVERSION
] = v9fs_version
,
2955 [P9_TLOPEN
] = v9fs_open
,
2956 [P9_TATTACH
] = v9fs_attach
,
2957 [P9_TSTAT
] = v9fs_stat
,
2958 [P9_TWALK
] = v9fs_walk
,
2959 [P9_TCLUNK
] = v9fs_clunk
,
2960 [P9_TFSYNC
] = v9fs_fsync
,
2961 [P9_TOPEN
] = v9fs_open
,
2962 [P9_TREAD
] = v9fs_read
,
2964 [P9_TAUTH
] = v9fs_auth
,
2966 [P9_TFLUSH
] = v9fs_flush
,
2967 [P9_TLINK
] = v9fs_link
,
2968 [P9_TSYMLINK
] = v9fs_symlink
,
2969 [P9_TCREATE
] = v9fs_create
,
2970 [P9_TLCREATE
] = v9fs_lcreate
,
2971 [P9_TWRITE
] = v9fs_write
,
2972 [P9_TWSTAT
] = v9fs_wstat
,
2973 [P9_TREMOVE
] = v9fs_remove
,
2976 static void v9fs_op_not_supp(void *opaque
)
2978 V9fsPDU
*pdu
= opaque
;
2979 complete_pdu(pdu
->s
, pdu
, -EOPNOTSUPP
);
2982 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
2985 CoroutineEntry
*handler
;
2990 if (pdu
->id
>= ARRAY_SIZE(pdu_co_handlers
) ||
2991 (pdu_co_handlers
[pdu
->id
] == NULL
)) {
2992 handler
= v9fs_op_not_supp
;
2994 handler
= pdu_co_handlers
[pdu
->id
];
2996 co
= qemu_coroutine_create(handler
);
2997 qemu_coroutine_enter(co
, pdu
);
3000 void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3002 V9fsState
*s
= (V9fsState
*)vdev
;
3006 while ((pdu
= alloc_pdu(s
)) &&
3007 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3010 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3011 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3013 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3015 memcpy(&pdu
->size
, ptr
, 4);
3017 memcpy(&pdu
->tag
, ptr
+ 5, 2);