]>
git.proxmox.com Git - qemu.git/blob - hw/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.
16 #include "qemu_socket.h"
17 #include "virtio-9p.h"
18 #include "fsdev/qemu-fsdev.h"
19 #include "virtio-9p-debug.h"
36 static int omode_to_uflags(int8_t mode
)
70 void cred_init(FsCred
*credp
)
78 static int v9fs_do_lstat(V9fsState
*s
, V9fsString
*path
, struct stat
*stbuf
)
80 return s
->ops
->lstat(&s
->ctx
, path
->data
, stbuf
);
83 static ssize_t
v9fs_do_readlink(V9fsState
*s
, V9fsString
*path
, V9fsString
*buf
)
87 buf
->data
= qemu_malloc(1024);
89 len
= s
->ops
->readlink(&s
->ctx
, path
->data
, buf
->data
, 1024 - 1);
98 static int v9fs_do_close(V9fsState
*s
, int fd
)
100 return s
->ops
->close(&s
->ctx
, fd
);
103 static int v9fs_do_closedir(V9fsState
*s
, DIR *dir
)
105 return s
->ops
->closedir(&s
->ctx
, dir
);
108 static int v9fs_do_open(V9fsState
*s
, V9fsString
*path
, int flags
)
110 return s
->ops
->open(&s
->ctx
, path
->data
, flags
);
113 static DIR *v9fs_do_opendir(V9fsState
*s
, V9fsString
*path
)
115 return s
->ops
->opendir(&s
->ctx
, path
->data
);
118 static void v9fs_do_rewinddir(V9fsState
*s
, DIR *dir
)
120 return s
->ops
->rewinddir(&s
->ctx
, dir
);
123 static off_t
v9fs_do_telldir(V9fsState
*s
, DIR *dir
)
125 return s
->ops
->telldir(&s
->ctx
, dir
);
128 static struct dirent
*v9fs_do_readdir(V9fsState
*s
, DIR *dir
)
130 return s
->ops
->readdir(&s
->ctx
, dir
);
133 static void v9fs_do_seekdir(V9fsState
*s
, DIR *dir
, off_t off
)
135 return s
->ops
->seekdir(&s
->ctx
, dir
, off
);
138 static int v9fs_do_readv(V9fsState
*s
, int fd
, const struct iovec
*iov
,
141 return s
->ops
->readv(&s
->ctx
, fd
, iov
, iovcnt
);
144 static off_t
v9fs_do_lseek(V9fsState
*s
, int fd
, off_t offset
, int whence
)
146 return s
->ops
->lseek(&s
->ctx
, fd
, offset
, whence
);
149 static int v9fs_do_writev(V9fsState
*s
, int fd
, const struct iovec
*iov
,
152 return s
->ops
->writev(&s
->ctx
, fd
, iov
, iovcnt
);
155 static int v9fs_do_chmod(V9fsState
*s
, V9fsString
*path
, mode_t mode
)
160 return s
->ops
->chmod(&s
->ctx
, path
->data
, &cred
);
163 static int v9fs_do_mknod(V9fsState
*s
, char *name
,
164 mode_t mode
, dev_t dev
, uid_t uid
, gid_t gid
)
172 return s
->ops
->mknod(&s
->ctx
, name
, &cred
);
175 static int v9fs_do_mkdir(V9fsState
*s
, char *name
, mode_t mode
,
176 uid_t uid
, gid_t gid
)
185 return s
->ops
->mkdir(&s
->ctx
, name
, &cred
);
188 static int v9fs_do_fstat(V9fsState
*s
, int fd
, struct stat
*stbuf
)
190 return s
->ops
->fstat(&s
->ctx
, fd
, stbuf
);
193 static int v9fs_do_open2(V9fsState
*s
, char *fullname
, uid_t uid
, gid_t gid
,
201 cred
.fc_mode
= mode
& 07777;
204 return s
->ops
->open2(&s
->ctx
, fullname
, flags
, &cred
);
207 static int v9fs_do_symlink(V9fsState
*s
, V9fsFidState
*fidp
,
208 const char *oldpath
, const char *newpath
, gid_t gid
)
212 cred
.fc_uid
= fidp
->uid
;
216 return s
->ops
->symlink(&s
->ctx
, oldpath
, newpath
, &cred
);
219 static int v9fs_do_link(V9fsState
*s
, V9fsString
*oldpath
, V9fsString
*newpath
)
221 return s
->ops
->link(&s
->ctx
, oldpath
->data
, newpath
->data
);
224 static int v9fs_do_truncate(V9fsState
*s
, V9fsString
*path
, off_t size
)
226 return s
->ops
->truncate(&s
->ctx
, path
->data
, size
);
229 static int v9fs_do_rename(V9fsState
*s
, V9fsString
*oldpath
,
232 return s
->ops
->rename(&s
->ctx
, oldpath
->data
, newpath
->data
);
235 static int v9fs_do_chown(V9fsState
*s
, V9fsString
*path
, uid_t uid
, gid_t gid
)
242 return s
->ops
->chown(&s
->ctx
, path
->data
, &cred
);
245 static int v9fs_do_utimensat(V9fsState
*s
, V9fsString
*path
,
246 const struct timespec times
[2])
248 return s
->ops
->utimensat(&s
->ctx
, path
->data
, times
);
251 static int v9fs_do_remove(V9fsState
*s
, V9fsString
*path
)
253 return s
->ops
->remove(&s
->ctx
, path
->data
);
256 static int v9fs_do_fsync(V9fsState
*s
, int fd
)
258 return s
->ops
->fsync(&s
->ctx
, fd
);
261 static int v9fs_do_statfs(V9fsState
*s
, V9fsString
*path
, struct statfs
*stbuf
)
263 return s
->ops
->statfs(&s
->ctx
, path
->data
, stbuf
);
266 static ssize_t
v9fs_do_lgetxattr(V9fsState
*s
, V9fsString
*path
,
267 V9fsString
*xattr_name
,
268 void *value
, size_t size
)
270 return s
->ops
->lgetxattr(&s
->ctx
, path
->data
,
271 xattr_name
->data
, value
, size
);
274 static ssize_t
v9fs_do_llistxattr(V9fsState
*s
, V9fsString
*path
,
275 void *value
, size_t size
)
277 return s
->ops
->llistxattr(&s
->ctx
, path
->data
,
281 static int v9fs_do_lsetxattr(V9fsState
*s
, V9fsString
*path
,
282 V9fsString
*xattr_name
,
283 void *value
, size_t size
, int flags
)
285 return s
->ops
->lsetxattr(&s
->ctx
, path
->data
,
286 xattr_name
->data
, value
, size
, flags
);
289 static void v9fs_string_init(V9fsString
*str
)
295 static void v9fs_string_free(V9fsString
*str
)
297 qemu_free(str
->data
);
302 static void v9fs_string_null(V9fsString
*str
)
304 v9fs_string_free(str
);
307 static int number_to_string(void *arg
, char type
)
309 unsigned int ret
= 0;
313 unsigned int num
= *(unsigned int *)arg
;
322 printf("Number_to_string: Unknown number format\n");
329 static int v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
332 char *iter
= (char *)fmt
;
336 unsigned int arg_uint
;
338 /* Find the number of %'s that denotes an argument */
339 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
344 len
= strlen(fmt
) - 2*nr_args
;
354 /* Now parse the format string */
355 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
359 arg_uint
= va_arg(ap2
, unsigned int);
360 len
+= number_to_string((void *)&arg_uint
, 'u');
363 arg_char_ptr
= va_arg(ap2
, char *);
364 len
+= strlen(arg_char_ptr
);
371 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
378 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
380 return vsprintf(*strp
, fmt
, ap
);
383 static void v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
388 v9fs_string_free(str
);
391 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
398 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
400 v9fs_string_free(lhs
);
401 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
404 static size_t v9fs_string_size(V9fsString
*str
)
409 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
413 for (f
= s
->fid_list
; f
; f
= f
->next
) {
422 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
426 f
= lookup_fid(s
, fid
);
431 f
= qemu_mallocz(sizeof(V9fsFidState
));
434 f
->fid_type
= P9_FID_NONE
;
436 f
->next
= s
->fid_list
;
442 static int v9fs_xattr_fid_clunk(V9fsState
*s
, V9fsFidState
*fidp
)
446 if (fidp
->fs
.xattr
.copied_len
== -1) {
447 /* getxattr/listxattr fid */
451 * if this is fid for setxattr. clunk should
452 * result in setxattr localcall
454 if (fidp
->fs
.xattr
.len
!= fidp
->fs
.xattr
.copied_len
) {
455 /* clunk after partial write */
459 retval
= v9fs_do_lsetxattr(s
, &fidp
->path
, &fidp
->fs
.xattr
.name
,
460 fidp
->fs
.xattr
.value
,
462 fidp
->fs
.xattr
.flags
);
464 v9fs_string_free(&fidp
->fs
.xattr
.name
);
466 if (fidp
->fs
.xattr
.value
) {
467 qemu_free(fidp
->fs
.xattr
.value
);
472 static int free_fid(V9fsState
*s
, int32_t fid
)
475 V9fsFidState
**fidpp
, *fidp
;
477 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
478 if ((*fidpp
)->fid
== fid
) {
483 if (*fidpp
== NULL
) {
490 if (fidp
->fid_type
== P9_FID_FILE
) {
491 v9fs_do_close(s
, fidp
->fs
.fd
);
492 } else if (fidp
->fid_type
== P9_FID_DIR
) {
493 v9fs_do_closedir(s
, fidp
->fs
.dir
);
494 } else if (fidp
->fid_type
== P9_FID_XATTR
) {
495 retval
= v9fs_xattr_fid_clunk(s
, fidp
);
497 v9fs_string_free(&fidp
->path
);
503 #define P9_QID_TYPE_DIR 0x80
504 #define P9_QID_TYPE_SYMLINK 0x02
506 #define P9_STAT_MODE_DIR 0x80000000
507 #define P9_STAT_MODE_APPEND 0x40000000
508 #define P9_STAT_MODE_EXCL 0x20000000
509 #define P9_STAT_MODE_MOUNT 0x10000000
510 #define P9_STAT_MODE_AUTH 0x08000000
511 #define P9_STAT_MODE_TMP 0x04000000
512 #define P9_STAT_MODE_SYMLINK 0x02000000
513 #define P9_STAT_MODE_LINK 0x01000000
514 #define P9_STAT_MODE_DEVICE 0x00800000
515 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
516 #define P9_STAT_MODE_SOCKET 0x00100000
517 #define P9_STAT_MODE_SETUID 0x00080000
518 #define P9_STAT_MODE_SETGID 0x00040000
519 #define P9_STAT_MODE_SETVTX 0x00010000
521 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
522 P9_STAT_MODE_SYMLINK | \
523 P9_STAT_MODE_LINK | \
524 P9_STAT_MODE_DEVICE | \
525 P9_STAT_MODE_NAMED_PIPE | \
528 /* This is the algorithm from ufs in spfs */
529 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
533 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
534 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
535 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
537 if (S_ISDIR(stbuf
->st_mode
)) {
538 qidp
->type
|= P9_QID_TYPE_DIR
;
540 if (S_ISLNK(stbuf
->st_mode
)) {
541 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
545 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
550 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
555 stat_to_qid(&stbuf
, qidp
);
559 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
563 if (!QLIST_EMPTY(&s
->free_list
)) {
564 pdu
= QLIST_FIRST(&s
->free_list
);
565 QLIST_REMOVE(pdu
, next
);
570 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
573 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
577 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
578 size_t offset
, size_t size
, int pack
)
583 for (i
= 0; size
&& i
< sg_count
; i
++) {
585 if (offset
>= sg
[i
].iov_len
) {
587 offset
-= sg
[i
].iov_len
;
590 len
= MIN(sg
[i
].iov_len
- offset
, size
);
592 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
594 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
609 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
611 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
615 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
618 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
622 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
626 struct iovec
*src_sg
;
630 src_sg
= pdu
->elem
.in_sg
;
631 num
= pdu
->elem
.in_num
;
633 src_sg
= pdu
->elem
.out_sg
;
634 num
= pdu
->elem
.out_num
;
638 for (i
= 0; i
< num
; i
++) {
640 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
641 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
643 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
644 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
645 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
646 sg
[j
].iov_base
+= (offset
- pos
);
647 sg
[j
].iov_len
-= (offset
- pos
);
650 pos
+= src_sg
[i
].iov_len
;
656 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
658 size_t old_offset
= offset
;
663 for (i
= 0; fmt
[i
]; i
++) {
666 uint8_t *valp
= va_arg(ap
, uint8_t *);
667 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
672 valp
= va_arg(ap
, uint16_t *);
673 val
= le16_to_cpupu(valp
);
674 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
680 valp
= va_arg(ap
, uint32_t *);
681 val
= le32_to_cpupu(valp
);
682 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
688 valp
= va_arg(ap
, uint64_t *);
689 val
= le64_to_cpup(valp
);
690 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
695 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
696 int *iovcnt
= va_arg(ap
, int *);
697 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
701 V9fsString
*str
= va_arg(ap
, V9fsString
*);
702 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
703 /* FIXME: sanity check str->size */
704 str
->data
= qemu_malloc(str
->size
+ 1);
705 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
706 str
->data
[str
->size
] = 0;
710 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
711 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
712 &qidp
->type
, &qidp
->version
, &qidp
->path
);
716 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
717 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
718 &statp
->size
, &statp
->type
, &statp
->dev
,
719 &statp
->qid
, &statp
->mode
, &statp
->atime
,
720 &statp
->mtime
, &statp
->length
,
721 &statp
->name
, &statp
->uid
, &statp
->gid
,
722 &statp
->muid
, &statp
->extension
,
723 &statp
->n_uid
, &statp
->n_gid
,
728 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
729 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
730 &iattr
->valid
, &iattr
->mode
,
731 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
732 &iattr
->atime_sec
, &iattr
->atime_nsec
,
733 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
743 return offset
- old_offset
;
746 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
748 size_t old_offset
= offset
;
753 for (i
= 0; fmt
[i
]; i
++) {
756 uint8_t val
= va_arg(ap
, int);
757 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
762 cpu_to_le16w(&val
, va_arg(ap
, int));
763 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
768 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
769 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
774 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
775 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
779 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
780 int *iovcnt
= va_arg(ap
, int *);
781 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
785 V9fsString
*str
= va_arg(ap
, V9fsString
*);
786 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
787 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
791 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
792 offset
+= pdu_marshal(pdu
, offset
, "bdq",
793 qidp
->type
, qidp
->version
, qidp
->path
);
797 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
798 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
799 statp
->size
, statp
->type
, statp
->dev
,
800 &statp
->qid
, statp
->mode
, statp
->atime
,
801 statp
->mtime
, statp
->length
, &statp
->name
,
802 &statp
->uid
, &statp
->gid
, &statp
->muid
,
803 &statp
->extension
, statp
->n_uid
,
804 statp
->n_gid
, statp
->n_muid
);
808 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
809 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
810 statp
->st_result_mask
,
811 &statp
->qid
, statp
->st_mode
,
812 statp
->st_uid
, statp
->st_gid
,
813 statp
->st_nlink
, statp
->st_rdev
,
814 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
815 statp
->st_atime_sec
, statp
->st_atime_nsec
,
816 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
817 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
818 statp
->st_btime_sec
, statp
->st_btime_nsec
,
819 statp
->st_gen
, statp
->st_data_version
);
828 return offset
- old_offset
;
831 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
833 int8_t id
= pdu
->id
+ 1; /* Response */
839 str
.data
= strerror(err
);
840 str
.size
= strlen(str
.data
);
843 len
+= pdu_marshal(pdu
, len
, "s", &str
);
845 len
+= pdu_marshal(pdu
, len
, "d", err
);
851 /* fill out the header */
852 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
854 /* keep these in sync */
858 /* push onto queue and notify */
859 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
861 /* FIXME: we should batch these completions */
862 virtio_notify(&s
->vdev
, s
->vq
);
867 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
872 if (mode
& P9_STAT_MODE_DIR
) {
877 if (mode
& P9_STAT_MODE_SYMLINK
) {
880 if (mode
& P9_STAT_MODE_SOCKET
) {
883 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
886 if (mode
& P9_STAT_MODE_DEVICE
) {
887 if (extension
&& extension
->data
[0] == 'c') {
899 if (mode
& P9_STAT_MODE_SETUID
) {
902 if (mode
& P9_STAT_MODE_SETGID
) {
905 if (mode
& P9_STAT_MODE_SETVTX
) {
912 static int donttouch_stat(V9fsStat
*stat
)
914 if (stat
->type
== -1 &&
916 stat
->qid
.type
== -1 &&
917 stat
->qid
.version
== -1 &&
918 stat
->qid
.path
== -1 &&
922 stat
->length
== -1 &&
929 stat
->n_muid
== -1) {
936 static void v9fs_stat_free(V9fsStat
*stat
)
938 v9fs_string_free(&stat
->name
);
939 v9fs_string_free(&stat
->uid
);
940 v9fs_string_free(&stat
->gid
);
941 v9fs_string_free(&stat
->muid
);
942 v9fs_string_free(&stat
->extension
);
945 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
949 mode
= stbuf
->st_mode
& 0777;
950 if (S_ISDIR(stbuf
->st_mode
)) {
951 mode
|= P9_STAT_MODE_DIR
;
955 if (S_ISLNK(stbuf
->st_mode
)) {
956 mode
|= P9_STAT_MODE_SYMLINK
;
959 if (S_ISSOCK(stbuf
->st_mode
)) {
960 mode
|= P9_STAT_MODE_SOCKET
;
963 if (S_ISFIFO(stbuf
->st_mode
)) {
964 mode
|= P9_STAT_MODE_NAMED_PIPE
;
967 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
968 mode
|= P9_STAT_MODE_DEVICE
;
971 if (stbuf
->st_mode
& S_ISUID
) {
972 mode
|= P9_STAT_MODE_SETUID
;
975 if (stbuf
->st_mode
& S_ISGID
) {
976 mode
|= P9_STAT_MODE_SETGID
;
979 if (stbuf
->st_mode
& S_ISVTX
) {
980 mode
|= P9_STAT_MODE_SETVTX
;
987 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
988 const struct stat
*stbuf
,
994 memset(v9stat
, 0, sizeof(*v9stat
));
996 stat_to_qid(stbuf
, &v9stat
->qid
);
997 v9stat
->mode
= stat_to_v9mode(stbuf
);
998 v9stat
->atime
= stbuf
->st_atime
;
999 v9stat
->mtime
= stbuf
->st_mtime
;
1000 v9stat
->length
= stbuf
->st_size
;
1002 v9fs_string_null(&v9stat
->uid
);
1003 v9fs_string_null(&v9stat
->gid
);
1004 v9fs_string_null(&v9stat
->muid
);
1007 v9stat
->n_uid
= stbuf
->st_uid
;
1008 v9stat
->n_gid
= stbuf
->st_gid
;
1011 v9fs_string_null(&v9stat
->extension
);
1013 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
1014 err
= v9fs_do_readlink(s
, name
, &v9stat
->extension
);
1019 v9stat
->extension
.data
[err
] = 0;
1020 v9stat
->extension
.size
= err
;
1021 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
1022 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
1023 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
1024 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
1025 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
1026 v9fs_string_sprintf(&v9stat
->extension
, "%s %u",
1027 "HARDLINKCOUNT", stbuf
->st_nlink
);
1031 str
= strrchr(name
->data
, '/');
1038 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
1041 v9fs_string_size(&v9stat
->name
) +
1042 v9fs_string_size(&v9stat
->uid
) +
1043 v9fs_string_size(&v9stat
->gid
) +
1044 v9fs_string_size(&v9stat
->muid
) +
1045 v9fs_string_size(&v9stat
->extension
);
1049 #define P9_STATS_MODE 0x00000001ULL
1050 #define P9_STATS_NLINK 0x00000002ULL
1051 #define P9_STATS_UID 0x00000004ULL
1052 #define P9_STATS_GID 0x00000008ULL
1053 #define P9_STATS_RDEV 0x00000010ULL
1054 #define P9_STATS_ATIME 0x00000020ULL
1055 #define P9_STATS_MTIME 0x00000040ULL
1056 #define P9_STATS_CTIME 0x00000080ULL
1057 #define P9_STATS_INO 0x00000100ULL
1058 #define P9_STATS_SIZE 0x00000200ULL
1059 #define P9_STATS_BLOCKS 0x00000400ULL
1061 #define P9_STATS_BTIME 0x00000800ULL
1062 #define P9_STATS_GEN 0x00001000ULL
1063 #define P9_STATS_DATA_VERSION 0x00002000ULL
1065 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1066 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1069 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1070 V9fsStatDotl
*v9lstat
)
1072 memset(v9lstat
, 0, sizeof(*v9lstat
));
1074 v9lstat
->st_mode
= stbuf
->st_mode
;
1075 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1076 v9lstat
->st_uid
= stbuf
->st_uid
;
1077 v9lstat
->st_gid
= stbuf
->st_gid
;
1078 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1079 v9lstat
->st_size
= stbuf
->st_size
;
1080 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1081 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1082 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1083 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1084 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1085 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1086 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1087 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1088 /* Currently we only support BASIC fields in stat */
1089 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1091 stat_to_qid(stbuf
, &v9lstat
->qid
);
1094 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1096 while (len
&& *iovcnt
) {
1097 if (len
< sg
->iov_len
) {
1099 sg
->iov_base
+= len
;
1111 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1116 for (i
= 0; i
< *cnt
; i
++) {
1117 if ((total
+ sg
[i
].iov_len
) > cap
) {
1118 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1122 total
+= sg
[i
].iov_len
;
1130 static void print_sg(struct iovec
*sg
, int cnt
)
1134 printf("sg[%d]: {", cnt
);
1135 for (i
= 0; i
< cnt
; i
++) {
1139 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1144 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1147 v9fs_string_init(&str
);
1148 v9fs_string_copy(&str
, dst
);
1149 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1150 v9fs_string_free(&str
);
1153 static void v9fs_version(V9fsState
*s
, V9fsPDU
*pdu
)
1158 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1160 if (!strcmp(version
.data
, "9P2000.u")) {
1161 s
->proto_version
= V9FS_PROTO_2000U
;
1162 } else if (!strcmp(version
.data
, "9P2000.L")) {
1163 s
->proto_version
= V9FS_PROTO_2000L
;
1165 v9fs_string_sprintf(&version
, "unknown");
1168 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1169 complete_pdu(s
, pdu
, offset
);
1171 v9fs_string_free(&version
);
1174 static void v9fs_attach(V9fsState
*s
, V9fsPDU
*pdu
)
1176 int32_t fid
, afid
, n_uname
;
1177 V9fsString uname
, aname
;
1183 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1185 fidp
= alloc_fid(s
, fid
);
1191 fidp
->uid
= n_uname
;
1193 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1194 err
= fid_to_qid(s
, fidp
, &qid
);
1201 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1205 complete_pdu(s
, pdu
, err
);
1206 v9fs_string_free(&uname
);
1207 v9fs_string_free(&aname
);
1210 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1217 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1221 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1225 complete_pdu(s
, vs
->pdu
, err
);
1226 v9fs_stat_free(&vs
->v9stat
);
1230 static void v9fs_stat(V9fsState
*s
, V9fsPDU
*pdu
)
1236 vs
= qemu_malloc(sizeof(*vs
));
1240 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1242 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1244 vs
->fidp
= lookup_fid(s
, fid
);
1245 if (vs
->fidp
== NULL
) {
1250 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1251 v9fs_stat_post_lstat(s
, vs
, err
);
1255 complete_pdu(s
, vs
->pdu
, err
);
1256 v9fs_stat_free(&vs
->v9stat
);
1260 static void v9fs_getattr_post_lstat(V9fsState
*s
, V9fsStatStateDotl
*vs
,
1268 stat_to_v9stat_dotl(s
, &vs
->stbuf
, &vs
->v9stat_dotl
);
1269 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "A", &vs
->v9stat_dotl
);
1273 complete_pdu(s
, vs
->pdu
, err
);
1277 static void v9fs_getattr(V9fsState
*s
, V9fsPDU
*pdu
)
1280 V9fsStatStateDotl
*vs
;
1283 uint64_t request_mask
;
1285 vs
= qemu_malloc(sizeof(*vs
));
1289 memset(&vs
->v9stat_dotl
, 0, sizeof(vs
->v9stat_dotl
));
1291 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dq", &fid
, &request_mask
);
1293 fidp
= lookup_fid(s
, fid
);
1299 /* Currently we only support BASIC fields in stat, so there is no
1300 * need to look at request_mask.
1302 err
= v9fs_do_lstat(s
, &fidp
->path
, &vs
->stbuf
);
1303 v9fs_getattr_post_lstat(s
, vs
, err
);
1307 complete_pdu(s
, vs
->pdu
, err
);
1311 /* From Linux kernel code */
1312 #define ATTR_MODE (1 << 0)
1313 #define ATTR_UID (1 << 1)
1314 #define ATTR_GID (1 << 2)
1315 #define ATTR_SIZE (1 << 3)
1316 #define ATTR_ATIME (1 << 4)
1317 #define ATTR_MTIME (1 << 5)
1318 #define ATTR_CTIME (1 << 6)
1319 #define ATTR_MASK 127
1320 #define ATTR_ATIME_SET (1 << 7)
1321 #define ATTR_MTIME_SET (1 << 8)
1323 static void v9fs_setattr_post_truncate(V9fsState
*s
, V9fsSetattrState
*vs
,
1333 complete_pdu(s
, vs
->pdu
, err
);
1337 static void v9fs_setattr_post_chown(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1344 if (vs
->v9iattr
.valid
& (ATTR_SIZE
)) {
1345 err
= v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9iattr
.size
);
1347 v9fs_setattr_post_truncate(s
, vs
, err
);
1351 complete_pdu(s
, vs
->pdu
, err
);
1355 static void v9fs_setattr_post_utimensat(V9fsState
*s
, V9fsSetattrState
*vs
,
1363 /* If the only valid entry in iattr is ctime we can call
1364 * chown(-1,-1) to update the ctime of the file
1366 if ((vs
->v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1367 ((vs
->v9iattr
.valid
& ATTR_CTIME
)
1368 && !((vs
->v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1369 if (!(vs
->v9iattr
.valid
& ATTR_UID
)) {
1370 vs
->v9iattr
.uid
= -1;
1372 if (!(vs
->v9iattr
.valid
& ATTR_GID
)) {
1373 vs
->v9iattr
.gid
= -1;
1375 err
= v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9iattr
.uid
,
1378 v9fs_setattr_post_chown(s
, vs
, err
);
1382 complete_pdu(s
, vs
->pdu
, err
);
1386 static void v9fs_setattr_post_chmod(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1393 if (vs
->v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1394 struct timespec times
[2];
1395 if (vs
->v9iattr
.valid
& ATTR_ATIME
) {
1396 if (vs
->v9iattr
.valid
& ATTR_ATIME_SET
) {
1397 times
[0].tv_sec
= vs
->v9iattr
.atime_sec
;
1398 times
[0].tv_nsec
= vs
->v9iattr
.atime_nsec
;
1400 times
[0].tv_nsec
= UTIME_NOW
;
1403 times
[0].tv_nsec
= UTIME_OMIT
;
1406 if (vs
->v9iattr
.valid
& ATTR_MTIME
) {
1407 if (vs
->v9iattr
.valid
& ATTR_MTIME_SET
) {
1408 times
[1].tv_sec
= vs
->v9iattr
.mtime_sec
;
1409 times
[1].tv_nsec
= vs
->v9iattr
.mtime_nsec
;
1411 times
[1].tv_nsec
= UTIME_NOW
;
1414 times
[1].tv_nsec
= UTIME_OMIT
;
1416 err
= v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
);
1418 v9fs_setattr_post_utimensat(s
, vs
, err
);
1422 complete_pdu(s
, vs
->pdu
, err
);
1426 static void v9fs_setattr(V9fsState
*s
, V9fsPDU
*pdu
)
1429 V9fsSetattrState
*vs
;
1432 vs
= qemu_malloc(sizeof(*vs
));
1436 pdu_unmarshal(pdu
, vs
->offset
, "dI", &fid
, &vs
->v9iattr
);
1438 vs
->fidp
= lookup_fid(s
, fid
);
1439 if (vs
->fidp
== NULL
) {
1444 if (vs
->v9iattr
.valid
& ATTR_MODE
) {
1445 err
= v9fs_do_chmod(s
, &vs
->fidp
->path
, vs
->v9iattr
.mode
);
1448 v9fs_setattr_post_chmod(s
, vs
, err
);
1452 complete_pdu(s
, vs
->pdu
, err
);
1456 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1458 complete_pdu(s
, vs
->pdu
, err
);
1461 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1462 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1465 qemu_free(vs
->wnames
);
1466 qemu_free(vs
->qids
);
1470 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1474 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1476 for (i
= 0; i
< vs
->nwnames
; i
++) {
1477 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1481 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1485 free_fid(s
, vs
->newfidp
->fid
);
1486 v9fs_string_free(&vs
->path
);
1491 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1494 if (vs
->name_idx
< vs
->nwnames
) {
1495 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1496 vs
->wnames
[vs
->name_idx
].data
);
1497 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1499 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1500 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1504 v9fs_string_free(&vs
->path
);
1505 v9fs_walk_marshal(vs
);
1508 v9fs_walk_complete(s
, vs
, err
);
1511 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1515 v9fs_string_free(&vs
->path
);
1520 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1522 if (vs
->name_idx
< vs
->nwnames
) {
1524 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1525 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1526 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1528 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1529 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1533 v9fs_string_free(&vs
->path
);
1534 v9fs_walk_marshal(vs
);
1537 v9fs_walk_complete(s
, vs
, err
);
1540 static void v9fs_walk(V9fsState
*s
, V9fsPDU
*pdu
)
1542 int32_t fid
, newfid
;
1547 vs
= qemu_malloc(sizeof(*vs
));
1553 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1554 &newfid
, &vs
->nwnames
);
1557 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1559 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1561 for (i
= 0; i
< vs
->nwnames
; i
++) {
1562 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1567 vs
->fidp
= lookup_fid(s
, fid
);
1568 if (vs
->fidp
== NULL
) {
1573 /* FIXME: is this really valid? */
1574 if (fid
== newfid
) {
1576 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1577 v9fs_string_init(&vs
->path
);
1580 if (vs
->name_idx
< vs
->nwnames
) {
1581 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1582 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1583 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1585 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1586 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1590 vs
->newfidp
= alloc_fid(s
, newfid
);
1591 if (vs
->newfidp
== NULL
) {
1596 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1597 v9fs_string_init(&vs
->path
);
1599 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1601 if (vs
->name_idx
< vs
->nwnames
) {
1602 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1603 vs
->wnames
[vs
->name_idx
].data
);
1604 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1606 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1607 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1612 v9fs_walk_marshal(vs
);
1615 v9fs_walk_complete(s
, vs
, err
);
1618 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1620 struct statfs stbuf
;
1624 * iounit should be multiples of f_bsize (host filesystem block size
1625 * and as well as less than (client msize - P9_IOHDRSZ))
1627 if (!v9fs_do_statfs(s
, name
, &stbuf
)) {
1628 iounit
= stbuf
.f_bsize
;
1629 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1633 iounit
= s
->msize
- P9_IOHDRSZ
;
1638 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1640 if (vs
->fidp
->fs
.dir
== NULL
) {
1644 vs
->fidp
->fid_type
= P9_FID_DIR
;
1645 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1648 complete_pdu(s
, vs
->pdu
, err
);
1653 static void v9fs_open_post_getiounit(V9fsState
*s
, V9fsOpenState
*vs
)
1656 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
1658 complete_pdu(s
, vs
->pdu
, err
);
1662 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1664 if (vs
->fidp
->fs
.fd
== -1) {
1668 vs
->fidp
->fid_type
= P9_FID_FILE
;
1669 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
1670 v9fs_open_post_getiounit(s
, vs
);
1673 complete_pdu(s
, vs
->pdu
, err
);
1677 static inline int valid_flags(int flag
)
1679 if (flag
& O_NOCTTY
|| flag
& O_NONBLOCK
|| flag
& O_ASYNC
||
1686 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1695 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1697 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1698 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1699 v9fs_open_post_opendir(s
, vs
, err
);
1701 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1702 if (!valid_flags(vs
->mode
)) {
1708 flags
= omode_to_uflags(vs
->mode
);
1710 vs
->fidp
->fs
.fd
= v9fs_do_open(s
, &vs
->fidp
->path
, flags
);
1711 v9fs_open_post_open(s
, vs
, err
);
1715 complete_pdu(s
, vs
->pdu
, err
);
1719 static void v9fs_open(V9fsState
*s
, V9fsPDU
*pdu
)
1725 vs
= qemu_malloc(sizeof(*vs
));
1730 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1731 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dd", &fid
, &vs
->mode
);
1733 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1736 vs
->fidp
= lookup_fid(s
, fid
);
1737 if (vs
->fidp
== NULL
) {
1742 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
1744 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1746 v9fs_open_post_lstat(s
, vs
, err
);
1749 complete_pdu(s
, pdu
, err
);
1753 static void v9fs_post_lcreate(V9fsState
*s
, V9fsLcreateState
*vs
, int err
)
1756 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
1757 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1758 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
,
1762 vs
->fidp
->fid_type
= P9_FID_NONE
;
1763 close(vs
->fidp
->fs
.fd
);
1767 complete_pdu(s
, vs
->pdu
, err
);
1768 v9fs_string_free(&vs
->name
);
1769 v9fs_string_free(&vs
->fullname
);
1773 static void v9fs_lcreate_post_get_iounit(V9fsState
*s
, V9fsLcreateState
*vs
,
1780 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1783 v9fs_post_lcreate(s
, vs
, err
);
1786 static void v9fs_lcreate_post_do_open2(V9fsState
*s
, V9fsLcreateState
*vs
,
1789 if (vs
->fidp
->fs
.fd
== -1) {
1793 vs
->fidp
->fid_type
= P9_FID_FILE
;
1794 vs
->iounit
= get_iounit(s
, &vs
->fullname
);
1795 v9fs_lcreate_post_get_iounit(s
, vs
, err
);
1799 v9fs_post_lcreate(s
, vs
, err
);
1802 static void v9fs_lcreate(V9fsState
*s
, V9fsPDU
*pdu
)
1804 int32_t dfid
, flags
, mode
;
1806 V9fsLcreateState
*vs
;
1809 vs
= qemu_malloc(sizeof(*vs
));
1813 v9fs_string_init(&vs
->fullname
);
1815 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsddd", &dfid
, &vs
->name
, &flags
,
1818 vs
->fidp
= lookup_fid(s
, dfid
);
1819 if (vs
->fidp
== NULL
) {
1824 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
1827 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
1829 v9fs_lcreate_post_do_open2(s
, vs
, err
);
1833 complete_pdu(s
, vs
->pdu
, err
);
1834 v9fs_string_free(&vs
->name
);
1838 static void v9fs_clunk(V9fsState
*s
, V9fsPDU
*pdu
)
1844 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1846 err
= free_fid(s
, fid
);
1854 complete_pdu(s
, pdu
, err
);
1857 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1859 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1864 v9fs_stat_free(&vs
->v9stat
);
1865 v9fs_string_free(&vs
->name
);
1866 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1867 vs
->offset
+= vs
->count
;
1870 complete_pdu(s
, vs
->pdu
, err
);
1875 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1882 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1887 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1889 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1890 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1891 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1892 v9fs_read_post_seekdir(s
, vs
, err
);
1895 vs
->count
+= vs
->len
;
1896 v9fs_stat_free(&vs
->v9stat
);
1897 v9fs_string_free(&vs
->name
);
1898 vs
->dir_pos
= vs
->dent
->d_off
;
1899 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->fs
.dir
);
1900 v9fs_read_post_readdir(s
, vs
, err
);
1903 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->dir_pos
);
1904 v9fs_read_post_seekdir(s
, vs
, err
);
1909 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1912 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1913 v9fs_string_init(&vs
->name
);
1914 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1916 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1917 v9fs_read_post_dir_lstat(s
, vs
, err
);
1921 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1922 vs
->offset
+= vs
->count
;
1924 complete_pdu(s
, vs
->pdu
, err
);
1929 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1931 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->fs
.dir
);
1932 v9fs_read_post_readdir(s
, vs
, err
);
1936 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1939 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
1940 v9fs_read_post_telldir(s
, vs
, err
);
1944 static void v9fs_read_post_readv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1947 /* IO error return the error */
1951 vs
->total
+= vs
->len
;
1952 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1953 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1956 print_sg(vs
->sg
, vs
->cnt
);
1958 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
);
1959 } while (vs
->len
== -1 && errno
== EINTR
);
1960 if (vs
->len
== -1) {
1963 v9fs_read_post_readv(s
, vs
, err
);
1966 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1967 vs
->offset
+= vs
->count
;
1971 complete_pdu(s
, vs
->pdu
, err
);
1975 static void v9fs_read_post_lseek(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1981 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1983 if (vs
->total
< vs
->count
) {
1986 print_sg(vs
->sg
, vs
->cnt
);
1988 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
);
1989 } while (vs
->len
== -1 && errno
== EINTR
);
1990 if (vs
->len
== -1) {
1993 v9fs_read_post_readv(s
, vs
, err
);
1997 complete_pdu(s
, vs
->pdu
, err
);
2001 static void v9fs_xattr_read(V9fsState
*s
, V9fsReadState
*vs
)
2007 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2008 read_count
= xattr_len
- vs
->off
;
2009 if (read_count
> vs
->count
) {
2010 read_count
= vs
->count
;
2011 } else if (read_count
< 0) {
2013 * read beyond XATTR value
2017 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", read_count
);
2018 vs
->offset
+= pdu_pack(vs
->pdu
, vs
->offset
,
2019 ((char *)vs
->fidp
->fs
.xattr
.value
) + vs
->off
,
2022 complete_pdu(s
, vs
->pdu
, err
);
2026 static void v9fs_read(V9fsState
*s
, V9fsPDU
*pdu
)
2032 vs
= qemu_malloc(sizeof(*vs
));
2039 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
2041 vs
->fidp
= lookup_fid(s
, fid
);
2042 if (vs
->fidp
== NULL
) {
2047 if (vs
->fidp
->fid_type
== P9_FID_DIR
) {
2048 vs
->max_count
= vs
->count
;
2051 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
2053 v9fs_read_post_rewinddir(s
, vs
, err
);
2055 } else if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2057 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
2058 err
= v9fs_do_lseek(s
, vs
->fidp
->fs
.fd
, vs
->off
, SEEK_SET
);
2059 v9fs_read_post_lseek(s
, vs
, err
);
2061 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2062 v9fs_xattr_read(s
, vs
);
2068 complete_pdu(s
, pdu
, err
);
2072 typedef struct V9fsReadDirState
{
2076 off_t saved_dir_pos
;
2077 struct dirent
*dent
;
2081 int64_t initial_offset
;
2085 static void v9fs_readdir_post_seekdir(V9fsState
*s
, V9fsReadDirState
*vs
)
2087 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
2088 vs
->offset
+= vs
->count
;
2089 complete_pdu(s
, vs
->pdu
, vs
->offset
);
2094 /* Size of each dirent on the wire: size of qid (13) + size of offset (8)
2095 * size of type (1) + size of name.size (2) + strlen(name.data)
2097 #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
2099 static void v9fs_readdir_post_readdir(V9fsState
*s
, V9fsReadDirState
*vs
)
2105 v9fs_string_init(&vs
->name
);
2106 v9fs_string_sprintf(&vs
->name
, "%s", vs
->dent
->d_name
);
2108 if ((vs
->count
+ V9_READDIR_DATA_SZ
) > vs
->max_count
) {
2109 /* Ran out of buffer. Set dir back to old position and return */
2110 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->saved_dir_pos
);
2111 v9fs_readdir_post_seekdir(s
, vs
);
2115 /* Fill up just the path field of qid because the client uses
2116 * only that. To fill the entire qid structure we will have
2117 * to stat each dirent found, which is expensive
2119 size
= MIN(sizeof(vs
->dent
->d_ino
), sizeof(vs
->qid
.path
));
2120 memcpy(&vs
->qid
.path
, &vs
->dent
->d_ino
, size
);
2121 /* Fill the other fields with dummy values */
2123 vs
->qid
.version
= 0;
2125 len
= pdu_marshal(vs
->pdu
, vs
->offset
+4+vs
->count
, "Qqbs",
2126 &vs
->qid
, vs
->dent
->d_off
,
2127 vs
->dent
->d_type
, &vs
->name
);
2129 v9fs_string_free(&vs
->name
);
2130 vs
->saved_dir_pos
= vs
->dent
->d_off
;
2131 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->fs
.dir
);
2132 v9fs_readdir_post_readdir(s
, vs
);
2136 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
2137 vs
->offset
+= vs
->count
;
2138 complete_pdu(s
, vs
->pdu
, vs
->offset
);
2143 static void v9fs_readdir_post_telldir(V9fsState
*s
, V9fsReadDirState
*vs
)
2145 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->fs
.dir
);
2146 v9fs_readdir_post_readdir(s
, vs
);
2150 static void v9fs_readdir_post_setdir(V9fsState
*s
, V9fsReadDirState
*vs
)
2152 vs
->saved_dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->fs
.dir
);
2153 v9fs_readdir_post_telldir(s
, vs
);
2157 static void v9fs_readdir(V9fsState
*s
, V9fsPDU
*pdu
)
2160 V9fsReadDirState
*vs
;
2164 vs
= qemu_malloc(sizeof(*vs
));
2169 pdu_unmarshal(vs
->pdu
, offset
, "dqd", &fid
, &vs
->initial_offset
,
2172 vs
->fidp
= lookup_fid(s
, fid
);
2173 if (vs
->fidp
== NULL
|| !(vs
->fidp
->fs
.dir
)) {
2178 if (vs
->initial_offset
== 0) {
2179 v9fs_do_rewinddir(s
, vs
->fidp
->fs
.dir
);
2181 v9fs_do_seekdir(s
, vs
->fidp
->fs
.dir
, vs
->initial_offset
);
2184 v9fs_readdir_post_setdir(s
, vs
);
2188 complete_pdu(s
, pdu
, err
);
2193 static void v9fs_write_post_writev(V9fsState
*s
, V9fsWriteState
*vs
,
2197 /* IO error return the error */
2201 vs
->total
+= vs
->len
;
2202 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2203 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2206 print_sg(vs
->sg
, vs
->cnt
);
2208 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
);
2209 } while (vs
->len
== -1 && errno
== EINTR
);
2210 if (vs
->len
== -1) {
2213 v9fs_write_post_writev(s
, vs
, err
);
2216 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2220 complete_pdu(s
, vs
->pdu
, err
);
2224 static void v9fs_write_post_lseek(V9fsState
*s
, V9fsWriteState
*vs
, ssize_t err
)
2230 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2232 if (vs
->total
< vs
->count
) {
2235 print_sg(vs
->sg
, vs
->cnt
);
2237 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fs
.fd
, vs
->sg
, vs
->cnt
);
2238 } while (vs
->len
== -1 && errno
== EINTR
);
2239 if (vs
->len
== -1) {
2242 v9fs_write_post_writev(s
, vs
, err
);
2247 complete_pdu(s
, vs
->pdu
, err
);
2251 static void v9fs_xattr_write(V9fsState
*s
, V9fsWriteState
*vs
)
2258 xattr_len
= vs
->fidp
->fs
.xattr
.len
;
2259 write_count
= xattr_len
- vs
->off
;
2260 if (write_count
> vs
->count
) {
2261 write_count
= vs
->count
;
2262 } else if (write_count
< 0) {
2264 * write beyond XATTR value len specified in
2270 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", write_count
);
2272 vs
->fidp
->fs
.xattr
.copied_len
+= write_count
;
2274 * Now copy the content from sg list
2276 for (i
= 0; i
< vs
->cnt
; i
++) {
2277 if (write_count
> vs
->sg
[i
].iov_len
) {
2278 to_copy
= vs
->sg
[i
].iov_len
;
2280 to_copy
= write_count
;
2282 memcpy((char *)vs
->fidp
->fs
.xattr
.value
+ vs
->off
,
2283 vs
->sg
[i
].iov_base
, to_copy
);
2284 /* updating vs->off since we are not using below */
2286 write_count
-= to_copy
;
2289 complete_pdu(s
, vs
->pdu
, err
);
2293 static void v9fs_write(V9fsState
*s
, V9fsPDU
*pdu
)
2299 vs
= qemu_malloc(sizeof(*vs
));
2307 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2310 vs
->fidp
= lookup_fid(s
, fid
);
2311 if (vs
->fidp
== NULL
) {
2316 if (vs
->fidp
->fid_type
== P9_FID_FILE
) {
2317 if (vs
->fidp
->fs
.fd
== -1) {
2321 } else if (vs
->fidp
->fid_type
== P9_FID_XATTR
) {
2323 * setxattr operation
2325 v9fs_xattr_write(s
, vs
);
2331 err
= v9fs_do_lseek(s
, vs
->fidp
->fs
.fd
, vs
->off
, SEEK_SET
);
2333 v9fs_write_post_lseek(s
, vs
, err
);
2337 complete_pdu(s
, vs
->pdu
, err
);
2341 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2344 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2345 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2347 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2350 complete_pdu(s
, vs
->pdu
, err
);
2351 v9fs_string_free(&vs
->name
);
2352 v9fs_string_free(&vs
->extension
);
2353 v9fs_string_free(&vs
->fullname
);
2357 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2360 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2361 v9fs_create_post_getiounit(s
, vs
);
2365 complete_pdu(s
, vs
->pdu
, err
);
2366 v9fs_string_free(&vs
->name
);
2367 v9fs_string_free(&vs
->extension
);
2368 v9fs_string_free(&vs
->fullname
);
2372 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2377 v9fs_post_create(s
, vs
, err
);
2380 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2383 if (!vs
->fidp
->fs
.dir
) {
2386 vs
->fidp
->fid_type
= P9_FID_DIR
;
2387 v9fs_post_create(s
, vs
, err
);
2390 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2398 vs
->fidp
->fs
.dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2399 v9fs_create_post_opendir(s
, vs
, err
);
2403 v9fs_post_create(s
, vs
, err
);
2406 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2413 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2414 v9fs_create_post_dir_lstat(s
, vs
, err
);
2418 v9fs_post_create(s
, vs
, err
);
2421 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2424 vs
->fidp
->fid_type
= P9_FID_NONE
;
2425 close(vs
->fidp
->fs
.fd
);
2428 v9fs_post_create(s
, vs
, err
);
2432 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2434 if (vs
->fidp
->fs
.fd
== -1) {
2438 vs
->fidp
->fid_type
= P9_FID_FILE
;
2439 err
= v9fs_do_fstat(s
, vs
->fidp
->fs
.fd
, &vs
->stbuf
);
2440 v9fs_create_post_fstat(s
, vs
, err
);
2445 v9fs_post_create(s
, vs
, err
);
2449 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2452 if (err
== 0 || errno
!= ENOENT
) {
2457 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2458 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, vs
->perm
& 0777,
2460 v9fs_create_post_mkdir(s
, vs
, err
);
2461 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2462 err
= v9fs_do_symlink(s
, vs
->fidp
, vs
->extension
.data
,
2463 vs
->fullname
.data
, -1);
2464 v9fs_create_post_perms(s
, vs
, err
);
2465 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2466 int32_t nfid
= atoi(vs
->extension
.data
);
2467 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2468 if (nfidp
== NULL
) {
2470 v9fs_post_create(s
, vs
, err
);
2472 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2473 v9fs_create_post_perms(s
, vs
, err
);
2474 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2476 uint32_t major
, minor
;
2479 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2482 v9fs_post_create(s
, vs
, err
);
2494 v9fs_post_create(s
, vs
, err
);
2497 nmode
|= vs
->perm
& 0777;
2498 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, nmode
,
2499 makedev(major
, minor
), vs
->fidp
->uid
, -1);
2500 v9fs_create_post_perms(s
, vs
, err
);
2501 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2502 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFIFO
| (vs
->perm
& 0777),
2503 0, vs
->fidp
->uid
, -1);
2504 v9fs_post_create(s
, vs
, err
);
2505 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2506 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFSOCK
| (vs
->perm
& 0777),
2507 0, vs
->fidp
->uid
, -1);
2508 v9fs_post_create(s
, vs
, err
);
2510 vs
->fidp
->fs
.fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
2511 -1, omode_to_uflags(vs
->mode
)|O_CREAT
, vs
->perm
);
2513 v9fs_create_post_open2(s
, vs
, err
);
2519 v9fs_post_create(s
, vs
, err
);
2522 static void v9fs_create(V9fsState
*s
, V9fsPDU
*pdu
)
2525 V9fsCreateState
*vs
;
2528 vs
= qemu_malloc(sizeof(*vs
));
2532 v9fs_string_init(&vs
->fullname
);
2534 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2535 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2537 vs
->fidp
= lookup_fid(s
, fid
);
2538 if (vs
->fidp
== NULL
) {
2543 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2546 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2547 v9fs_create_post_lstat(s
, vs
, err
);
2551 complete_pdu(s
, vs
->pdu
, err
);
2552 v9fs_string_free(&vs
->name
);
2553 v9fs_string_free(&vs
->extension
);
2557 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2560 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2561 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2566 complete_pdu(s
, vs
->pdu
, err
);
2567 v9fs_string_free(&vs
->name
);
2568 v9fs_string_free(&vs
->symname
);
2569 v9fs_string_free(&vs
->fullname
);
2573 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2579 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2581 v9fs_post_symlink(s
, vs
, err
);
2584 static void v9fs_symlink(V9fsState
*s
, V9fsPDU
*pdu
)
2587 V9fsSymlinkState
*vs
;
2591 vs
= qemu_malloc(sizeof(*vs
));
2595 v9fs_string_init(&vs
->fullname
);
2597 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2598 &vs
->symname
, &gid
);
2600 vs
->dfidp
= lookup_fid(s
, dfid
);
2601 if (vs
->dfidp
== NULL
) {
2606 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2608 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2609 vs
->fullname
.data
, gid
);
2610 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2614 complete_pdu(s
, vs
->pdu
, err
);
2615 v9fs_string_free(&vs
->name
);
2616 v9fs_string_free(&vs
->symname
);
2620 static void v9fs_flush(V9fsState
*s
, V9fsPDU
*pdu
)
2622 /* A nop call with no return */
2623 complete_pdu(s
, pdu
, 7);
2626 static void v9fs_link(V9fsState
*s
, V9fsPDU
*pdu
)
2628 int32_t dfid
, oldfid
;
2629 V9fsFidState
*dfidp
, *oldfidp
;
2630 V9fsString name
, fullname
;
2634 v9fs_string_init(&fullname
);
2636 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2638 dfidp
= lookup_fid(s
, dfid
);
2639 if (dfidp
== NULL
) {
2644 oldfidp
= lookup_fid(s
, oldfid
);
2645 if (oldfidp
== NULL
) {
2650 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2652 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2656 v9fs_string_free(&fullname
);
2659 v9fs_string_free(&name
);
2660 complete_pdu(s
, pdu
, err
);
2663 static void v9fs_remove_post_remove(V9fsState
*s
, V9fsRemoveState
*vs
,
2672 /* For TREMOVE we need to clunk the fid even on failed remove */
2673 free_fid(s
, vs
->fidp
->fid
);
2675 complete_pdu(s
, vs
->pdu
, err
);
2679 static void v9fs_remove(V9fsState
*s
, V9fsPDU
*pdu
)
2682 V9fsRemoveState
*vs
;
2685 vs
= qemu_malloc(sizeof(*vs
));
2689 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
2691 vs
->fidp
= lookup_fid(s
, fid
);
2692 if (vs
->fidp
== NULL
) {
2697 err
= v9fs_do_remove(s
, &vs
->fidp
->path
);
2698 v9fs_remove_post_remove(s
, vs
, err
);
2702 complete_pdu(s
, pdu
, err
);
2706 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2715 v9fs_stat_free(&vs
->v9stat
);
2716 complete_pdu(s
, vs
->pdu
, err
);
2720 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2725 if (vs
->v9stat
.length
!= -1) {
2726 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2730 v9fs_wstat_post_truncate(s
, vs
, err
);
2734 v9fs_stat_free(&vs
->v9stat
);
2735 complete_pdu(s
, vs
->pdu
, err
);
2739 static int v9fs_complete_rename(V9fsState
*s
, V9fsRenameState
*vs
)
2742 char *old_name
, *new_name
;
2745 if (vs
->newdirfid
!= -1) {
2746 V9fsFidState
*dirfidp
;
2747 dirfidp
= lookup_fid(s
, vs
->newdirfid
);
2749 if (dirfidp
== NULL
) {
2754 BUG_ON(dirfidp
->fid_type
!= P9_FID_NONE
);
2756 new_name
= qemu_mallocz(dirfidp
->path
.size
+ vs
->name
.size
+ 2);
2758 strcpy(new_name
, dirfidp
->path
.data
);
2759 strcat(new_name
, "/");
2760 strcat(new_name
+ dirfidp
->path
.size
, vs
->name
.data
);
2762 old_name
= vs
->fidp
->path
.data
;
2763 end
= strrchr(old_name
, '/');
2769 new_name
= qemu_mallocz(end
- old_name
+ vs
->name
.size
+ 1);
2771 strncat(new_name
, old_name
, end
- old_name
);
2772 strncat(new_name
+ (end
- old_name
), vs
->name
.data
, vs
->name
.size
);
2775 v9fs_string_free(&vs
->name
);
2776 vs
->name
.data
= qemu_strdup(new_name
);
2777 vs
->name
.size
= strlen(new_name
);
2779 if (strcmp(new_name
, vs
->fidp
->path
.data
) != 0) {
2780 if (v9fs_do_rename(s
, &vs
->fidp
->path
, &vs
->name
)) {
2785 * Fixup fid's pointing to the old name to
2786 * start pointing to the new name
2788 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
2789 if (vs
->fidp
== fidp
) {
2791 * we replace name of this fid towards the end
2792 * so that our below strcmp will work
2796 if (!strncmp(vs
->fidp
->path
.data
, fidp
->path
.data
,
2797 strlen(vs
->fidp
->path
.data
))) {
2798 /* replace the name */
2799 v9fs_fix_path(&fidp
->path
, &vs
->name
,
2800 strlen(vs
->fidp
->path
.data
));
2803 v9fs_string_copy(&vs
->fidp
->path
, &vs
->name
);
2807 v9fs_string_free(&vs
->name
);
2811 static void v9fs_rename_post_rename(V9fsState
*s
, V9fsRenameState
*vs
, int err
)
2813 complete_pdu(s
, vs
->pdu
, err
);
2817 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2823 if (vs
->v9stat
.name
.size
!= 0) {
2824 V9fsRenameState
*vr
;
2826 vr
= qemu_mallocz(sizeof(V9fsRenameState
));
2829 vr
->fidp
= vs
->fidp
;
2830 vr
->offset
= vs
->offset
;
2831 vr
->name
.size
= vs
->v9stat
.name
.size
;
2832 vr
->name
.data
= qemu_strdup(vs
->v9stat
.name
.data
);
2834 err
= v9fs_complete_rename(s
, vr
);
2837 v9fs_wstat_post_rename(s
, vs
, err
);
2841 v9fs_stat_free(&vs
->v9stat
);
2842 complete_pdu(s
, vs
->pdu
, err
);
2846 static void v9fs_rename(V9fsState
*s
, V9fsPDU
*pdu
)
2849 V9fsRenameState
*vs
;
2852 vs
= qemu_malloc(sizeof(*vs
));
2856 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dds", &fid
, &vs
->newdirfid
, &vs
->name
);
2858 vs
->fidp
= lookup_fid(s
, fid
);
2859 if (vs
->fidp
== NULL
) {
2864 BUG_ON(vs
->fidp
->fid_type
!= P9_FID_NONE
);
2866 err
= v9fs_complete_rename(s
, vs
);
2867 v9fs_rename_post_rename(s
, vs
, err
);
2870 complete_pdu(s
, vs
->pdu
, err
);
2874 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2880 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2881 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2882 vs
->v9stat
.n_gid
)) {
2886 v9fs_wstat_post_chown(s
, vs
, err
);
2890 v9fs_stat_free(&vs
->v9stat
);
2891 complete_pdu(s
, vs
->pdu
, err
);
2895 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2901 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2902 struct timespec times
[2];
2903 if (vs
->v9stat
.atime
!= -1) {
2904 times
[0].tv_sec
= vs
->v9stat
.atime
;
2905 times
[0].tv_nsec
= 0;
2907 times
[0].tv_nsec
= UTIME_OMIT
;
2909 if (vs
->v9stat
.mtime
!= -1) {
2910 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2911 times
[1].tv_nsec
= 0;
2913 times
[1].tv_nsec
= UTIME_OMIT
;
2916 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2921 v9fs_wstat_post_utime(s
, vs
, err
);
2925 v9fs_stat_free(&vs
->v9stat
);
2926 complete_pdu(s
, vs
->pdu
, err
);
2930 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2935 v9fs_stat_free(&vs
->v9stat
);
2936 complete_pdu(s
, vs
->pdu
, err
);
2940 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2949 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2951 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2952 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2953 /* Attempting to change the type */
2958 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2959 &vs
->v9stat
.extension
))) {
2962 v9fs_wstat_post_chmod(s
, vs
, err
);
2966 v9fs_stat_free(&vs
->v9stat
);
2967 complete_pdu(s
, vs
->pdu
, err
);
2971 static void v9fs_wstat(V9fsState
*s
, V9fsPDU
*pdu
)
2977 vs
= qemu_malloc(sizeof(*vs
));
2981 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2983 vs
->fidp
= lookup_fid(s
, fid
);
2984 if (vs
->fidp
== NULL
) {
2989 /* do we need to sync the file? */
2990 if (donttouch_stat(&vs
->v9stat
)) {
2991 err
= v9fs_do_fsync(s
, vs
->fidp
->fs
.fd
);
2992 v9fs_wstat_post_fsync(s
, vs
, err
);
2996 if (vs
->v9stat
.mode
!= -1) {
2997 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2998 v9fs_wstat_post_lstat(s
, vs
, err
);
3002 v9fs_wstat_post_chmod(s
, vs
, err
);
3006 v9fs_stat_free(&vs
->v9stat
);
3007 complete_pdu(s
, vs
->pdu
, err
);
3011 static void v9fs_statfs_post_statfs(V9fsState
*s
, V9fsStatfsState
*vs
, int err
)
3013 int32_t bsize_factor
;
3021 * compute bsize factor based on host file system block size
3024 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/vs
->stbuf
.f_bsize
;
3025 if (!bsize_factor
) {
3028 vs
->v9statfs
.f_type
= vs
->stbuf
.f_type
;
3029 vs
->v9statfs
.f_bsize
= vs
->stbuf
.f_bsize
;
3030 vs
->v9statfs
.f_bsize
*= bsize_factor
;
3032 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
3033 * adjust(divide) the number of blocks, free blocks and available
3034 * blocks by bsize factor
3036 vs
->v9statfs
.f_blocks
= vs
->stbuf
.f_blocks
/bsize_factor
;
3037 vs
->v9statfs
.f_bfree
= vs
->stbuf
.f_bfree
/bsize_factor
;
3038 vs
->v9statfs
.f_bavail
= vs
->stbuf
.f_bavail
/bsize_factor
;
3039 vs
->v9statfs
.f_files
= vs
->stbuf
.f_files
;
3040 vs
->v9statfs
.f_ffree
= vs
->stbuf
.f_ffree
;
3041 vs
->v9statfs
.fsid_val
= (unsigned int) vs
->stbuf
.f_fsid
.__val
[0] |
3042 (unsigned long long)vs
->stbuf
.f_fsid
.__val
[1] << 32;
3043 vs
->v9statfs
.f_namelen
= vs
->stbuf
.f_namelen
;
3045 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "ddqqqqqqd",
3046 vs
->v9statfs
.f_type
, vs
->v9statfs
.f_bsize
, vs
->v9statfs
.f_blocks
,
3047 vs
->v9statfs
.f_bfree
, vs
->v9statfs
.f_bavail
, vs
->v9statfs
.f_files
,
3048 vs
->v9statfs
.f_ffree
, vs
->v9statfs
.fsid_val
,
3049 vs
->v9statfs
.f_namelen
);
3052 complete_pdu(s
, vs
->pdu
, vs
->offset
);
3056 static void v9fs_statfs(V9fsState
*s
, V9fsPDU
*pdu
)
3058 V9fsStatfsState
*vs
;
3061 vs
= qemu_malloc(sizeof(*vs
));
3065 memset(&vs
->v9statfs
, 0, sizeof(vs
->v9statfs
));
3067 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &vs
->fid
);
3069 vs
->fidp
= lookup_fid(s
, vs
->fid
);
3070 if (vs
->fidp
== NULL
) {
3075 err
= v9fs_do_statfs(s
, &vs
->fidp
->path
, &vs
->stbuf
);
3076 v9fs_statfs_post_statfs(s
, vs
, err
);
3080 complete_pdu(s
, vs
->pdu
, err
);
3084 static void v9fs_mknod_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3091 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3092 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3095 complete_pdu(s
, vs
->pdu
, err
);
3096 v9fs_string_free(&vs
->fullname
);
3097 v9fs_string_free(&vs
->name
);
3101 static void v9fs_mknod_post_mknod(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3108 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3109 v9fs_mknod_post_lstat(s
, vs
, err
);
3112 complete_pdu(s
, vs
->pdu
, err
);
3113 v9fs_string_free(&vs
->fullname
);
3114 v9fs_string_free(&vs
->name
);
3118 static void v9fs_mknod(V9fsState
*s
, V9fsPDU
*pdu
)
3128 vs
= qemu_malloc(sizeof(*vs
));
3132 v9fs_string_init(&vs
->fullname
);
3133 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdddd", &fid
, &vs
->name
, &mode
,
3134 &major
, &minor
, &gid
);
3136 fidp
= lookup_fid(s
, fid
);
3142 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3143 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, mode
, makedev(major
, minor
),
3145 v9fs_mknod_post_mknod(s
, vs
, err
);
3149 complete_pdu(s
, vs
->pdu
, err
);
3150 v9fs_string_free(&vs
->fullname
);
3151 v9fs_string_free(&vs
->name
);
3155 static void v9fs_mkdir_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3162 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3163 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3166 complete_pdu(s
, vs
->pdu
, err
);
3167 v9fs_string_free(&vs
->fullname
);
3168 v9fs_string_free(&vs
->name
);
3172 static void v9fs_mkdir_post_mkdir(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3179 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3180 v9fs_mkdir_post_lstat(s
, vs
, err
);
3183 complete_pdu(s
, vs
->pdu
, err
);
3184 v9fs_string_free(&vs
->fullname
);
3185 v9fs_string_free(&vs
->name
);
3189 static void v9fs_mkdir(V9fsState
*s
, V9fsPDU
*pdu
)
3198 vs
= qemu_malloc(sizeof(*vs
));
3202 v9fs_string_init(&vs
->fullname
);
3203 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdd", &fid
, &vs
->name
, &mode
,
3206 fidp
= lookup_fid(s
, fid
);
3212 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3213 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, mode
, fidp
->uid
, gid
);
3214 v9fs_mkdir_post_mkdir(s
, vs
, err
);
3218 complete_pdu(s
, vs
->pdu
, err
);
3219 v9fs_string_free(&vs
->fullname
);
3220 v9fs_string_free(&vs
->name
);
3224 static void v9fs_post_xattr_getvalue(V9fsState
*s
, V9fsXattrState
*vs
, int err
)
3229 free_fid(s
, vs
->xattr_fidp
->fid
);
3232 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "q", vs
->size
);
3235 complete_pdu(s
, vs
->pdu
, err
);
3236 v9fs_string_free(&vs
->name
);
3241 static void v9fs_post_xattr_check(V9fsState
*s
, V9fsXattrState
*vs
, ssize_t err
)
3245 free_fid(s
, vs
->xattr_fidp
->fid
);
3249 * Read the xattr value
3251 vs
->xattr_fidp
->fs
.xattr
.len
= vs
->size
;
3252 vs
->xattr_fidp
->fid_type
= P9_FID_XATTR
;
3253 vs
->xattr_fidp
->fs
.xattr
.copied_len
= -1;
3255 vs
->xattr_fidp
->fs
.xattr
.value
= qemu_malloc(vs
->size
);
3256 err
= v9fs_do_lgetxattr(s
, &vs
->xattr_fidp
->path
,
3257 &vs
->name
, vs
->xattr_fidp
->fs
.xattr
.value
,
3258 vs
->xattr_fidp
->fs
.xattr
.len
);
3260 v9fs_post_xattr_getvalue(s
, vs
, err
);
3263 complete_pdu(s
, vs
->pdu
, err
);
3264 v9fs_string_free(&vs
->name
);
3268 static void v9fs_post_lxattr_getvalue(V9fsState
*s
,
3269 V9fsXattrState
*vs
, int err
)
3273 free_fid(s
, vs
->xattr_fidp
->fid
);
3276 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "q", vs
->size
);
3279 complete_pdu(s
, vs
->pdu
, err
);
3280 v9fs_string_free(&vs
->name
);
3285 static void v9fs_post_lxattr_check(V9fsState
*s
,
3286 V9fsXattrState
*vs
, ssize_t err
)
3290 free_fid(s
, vs
->xattr_fidp
->fid
);
3294 * Read the xattr value
3296 vs
->xattr_fidp
->fs
.xattr
.len
= vs
->size
;
3297 vs
->xattr_fidp
->fid_type
= P9_FID_XATTR
;
3298 vs
->xattr_fidp
->fs
.xattr
.copied_len
= -1;
3300 vs
->xattr_fidp
->fs
.xattr
.value
= qemu_malloc(vs
->size
);
3301 err
= v9fs_do_llistxattr(s
, &vs
->xattr_fidp
->path
,
3302 vs
->xattr_fidp
->fs
.xattr
.value
,
3303 vs
->xattr_fidp
->fs
.xattr
.len
);
3305 v9fs_post_lxattr_getvalue(s
, vs
, err
);
3308 complete_pdu(s
, vs
->pdu
, err
);
3309 v9fs_string_free(&vs
->name
);
3313 static void v9fs_xattrwalk(V9fsState
*s
, V9fsPDU
*pdu
)
3317 int32_t fid
, newfid
;
3319 vs
= qemu_malloc(sizeof(*vs
));
3323 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dds", &fid
, &newfid
, &vs
->name
);
3324 vs
->file_fidp
= lookup_fid(s
, fid
);
3325 if (vs
->file_fidp
== NULL
) {
3330 vs
->xattr_fidp
= alloc_fid(s
, newfid
);
3331 if (vs
->xattr_fidp
== NULL
) {
3336 v9fs_string_copy(&vs
->xattr_fidp
->path
, &vs
->file_fidp
->path
);
3337 if (vs
->name
.data
[0] == 0) {
3339 * listxattr request. Get the size first
3341 vs
->size
= v9fs_do_llistxattr(s
, &vs
->xattr_fidp
->path
,
3346 v9fs_post_lxattr_check(s
, vs
, err
);
3350 * specific xattr fid. We check for xattr
3351 * presence also collect the xattr size
3353 vs
->size
= v9fs_do_lgetxattr(s
, &vs
->xattr_fidp
->path
,
3354 &vs
->name
, NULL
, 0);
3358 v9fs_post_xattr_check(s
, vs
, err
);
3362 complete_pdu(s
, vs
->pdu
, err
);
3363 v9fs_string_free(&vs
->name
);
3367 static void v9fs_xattrcreate(V9fsState
*s
, V9fsPDU
*pdu
)
3374 vs
= qemu_malloc(sizeof(*vs
));
3378 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsqd",
3379 &fid
, &vs
->name
, &vs
->size
, &flags
);
3381 vs
->file_fidp
= lookup_fid(s
, fid
);
3382 if (vs
->file_fidp
== NULL
) {
3387 /* Make the file fid point to xattr */
3388 vs
->xattr_fidp
= vs
->file_fidp
;
3389 vs
->xattr_fidp
->fid_type
= P9_FID_XATTR
;
3390 vs
->xattr_fidp
->fs
.xattr
.copied_len
= 0;
3391 vs
->xattr_fidp
->fs
.xattr
.len
= vs
->size
;
3392 vs
->xattr_fidp
->fs
.xattr
.flags
= flags
;
3393 v9fs_string_init(&vs
->xattr_fidp
->fs
.xattr
.name
);
3394 v9fs_string_copy(&vs
->xattr_fidp
->fs
.xattr
.name
, &vs
->name
);
3395 vs
->xattr_fidp
->fs
.xattr
.value
= qemu_malloc(vs
->size
);
3398 complete_pdu(s
, vs
->pdu
, err
);
3399 v9fs_string_free(&vs
->name
);
3403 typedef void (pdu_handler_t
)(V9fsState
*s
, V9fsPDU
*pdu
);
3405 static pdu_handler_t
*pdu_handlers
[] = {
3406 [P9_TREADDIR
] = v9fs_readdir
,
3407 [P9_TSTATFS
] = v9fs_statfs
,
3408 [P9_TGETATTR
] = v9fs_getattr
,
3409 [P9_TSETATTR
] = v9fs_setattr
,
3410 [P9_TXATTRWALK
] = v9fs_xattrwalk
,
3411 [P9_TXATTRCREATE
] = v9fs_xattrcreate
,
3412 [P9_TMKNOD
] = v9fs_mknod
,
3413 [P9_TRENAME
] = v9fs_rename
,
3414 [P9_TMKDIR
] = v9fs_mkdir
,
3415 [P9_TVERSION
] = v9fs_version
,
3416 [P9_TLOPEN
] = v9fs_open
,
3417 [P9_TATTACH
] = v9fs_attach
,
3418 [P9_TSTAT
] = v9fs_stat
,
3419 [P9_TWALK
] = v9fs_walk
,
3420 [P9_TCLUNK
] = v9fs_clunk
,
3421 [P9_TOPEN
] = v9fs_open
,
3422 [P9_TREAD
] = v9fs_read
,
3424 [P9_TAUTH
] = v9fs_auth
,
3426 [P9_TFLUSH
] = v9fs_flush
,
3427 [P9_TLINK
] = v9fs_link
,
3428 [P9_TSYMLINK
] = v9fs_symlink
,
3429 [P9_TCREATE
] = v9fs_create
,
3430 [P9_TLCREATE
] = v9fs_lcreate
,
3431 [P9_TWRITE
] = v9fs_write
,
3432 [P9_TWSTAT
] = v9fs_wstat
,
3433 [P9_TREMOVE
] = v9fs_remove
,
3436 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3438 pdu_handler_t
*handler
;
3444 BUG_ON(pdu
->id
>= ARRAY_SIZE(pdu_handlers
));
3446 handler
= pdu_handlers
[pdu
->id
];
3447 BUG_ON(handler
== NULL
);
3452 static void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3454 V9fsState
*s
= (V9fsState
*)vdev
;
3458 while ((pdu
= alloc_pdu(s
)) &&
3459 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3462 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3463 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3465 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3467 memcpy(&pdu
->size
, ptr
, 4);
3469 memcpy(&pdu
->tag
, ptr
+ 5, 2);
3477 static uint32_t virtio_9p_get_features(VirtIODevice
*vdev
, uint32_t features
)
3479 features
|= 1 << VIRTIO_9P_MOUNT_TAG
;
3483 static V9fsState
*to_virtio_9p(VirtIODevice
*vdev
)
3485 return (V9fsState
*)vdev
;
3488 static void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
3490 struct virtio_9p_config
*cfg
;
3491 V9fsState
*s
= to_virtio_9p(vdev
);
3493 cfg
= qemu_mallocz(sizeof(struct virtio_9p_config
) +
3495 stw_raw(&cfg
->tag_len
, s
->tag_len
);
3496 memcpy(cfg
->tag
, s
->tag
, s
->tag_len
);
3497 memcpy(config
, cfg
, s
->config_size
);
3501 VirtIODevice
*virtio_9p_init(DeviceState
*dev
, V9fsConf
*conf
)
3509 s
= (V9fsState
*)virtio_common_init("virtio-9p",
3511 sizeof(struct virtio_9p_config
)+
3515 /* initialize pdu allocator */
3516 QLIST_INIT(&s
->free_list
);
3517 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
3518 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
3521 s
->vq
= virtio_add_queue(&s
->vdev
, MAX_REQ
, handle_9p_output
);
3523 fse
= get_fsdev_fsentry(conf
->fsdev_id
);
3526 /* We don't have a fsdev identified by fsdev_id */
3527 fprintf(stderr
, "Virtio-9p device couldn't find fsdev "
3528 "with the id %s\n", conf
->fsdev_id
);
3532 if (!fse
->path
|| !conf
->tag
) {
3533 /* we haven't specified a mount_tag or the path */
3534 fprintf(stderr
, "fsdev with id %s needs path "
3535 "and Virtio-9p device needs mount_tag arguments\n",
3540 if (!strcmp(fse
->security_model
, "passthrough")) {
3541 /* Files on the Fileserver set to client user credentials */
3542 s
->ctx
.fs_sm
= SM_PASSTHROUGH
;
3543 } else if (!strcmp(fse
->security_model
, "mapped")) {
3544 /* Files on the fileserver are set to QEMU credentials.
3545 * Client user credentials are saved in extended attributes.
3547 s
->ctx
.fs_sm
= SM_MAPPED
;
3548 } else if (!strcmp(fse
->security_model
, "none")) {
3550 * Files on the fileserver are set to QEMU credentials.
3552 s
->ctx
.fs_sm
= SM_NONE
;
3555 fprintf(stderr
, "Default to security_model=none. You may want"
3556 " enable advanced security model using "
3557 "security option:\n\t security_model=passthrough \n\t "
3558 "security_model=mapped\n");
3559 s
->ctx
.fs_sm
= SM_NONE
;
3562 if (lstat(fse
->path
, &stat
)) {
3563 fprintf(stderr
, "share path %s does not exist\n", fse
->path
);
3565 } else if (!S_ISDIR(stat
.st_mode
)) {
3566 fprintf(stderr
, "share path %s is not a directory \n", fse
->path
);
3570 s
->ctx
.fs_root
= qemu_strdup(fse
->path
);
3571 len
= strlen(conf
->tag
);
3572 if (len
> MAX_TAG_LEN
) {
3575 /* s->tag is non-NULL terminated string */
3576 s
->tag
= qemu_malloc(len
);
3577 memcpy(s
->tag
, conf
->tag
, len
);
3582 s
->vdev
.get_features
= virtio_9p_get_features
;
3583 s
->config_size
= sizeof(struct virtio_9p_config
) +
3585 s
->vdev
.get_config
= virtio_9p_get_config
;