]>
git.proxmox.com Git - qemu.git/blob - hw/virtio-9p.c
deeacbd6c651fad333fa1fda0d93f72f3354b1a5
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 void v9fs_string_init(V9fsString
*str
)
272 static void v9fs_string_free(V9fsString
*str
)
274 qemu_free(str
->data
);
279 static void v9fs_string_null(V9fsString
*str
)
281 v9fs_string_free(str
);
284 static int number_to_string(void *arg
, char type
)
286 unsigned int ret
= 0;
290 unsigned int num
= *(unsigned int *)arg
;
299 printf("Number_to_string: Unknown number format\n");
306 static int v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
309 char *iter
= (char *)fmt
;
313 unsigned int arg_uint
;
315 /* Find the number of %'s that denotes an argument */
316 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
321 len
= strlen(fmt
) - 2*nr_args
;
331 /* Now parse the format string */
332 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
336 arg_uint
= va_arg(ap2
, unsigned int);
337 len
+= number_to_string((void *)&arg_uint
, 'u');
340 arg_char_ptr
= va_arg(ap2
, char *);
341 len
+= strlen(arg_char_ptr
);
348 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
355 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
357 return vsprintf(*strp
, fmt
, ap
);
360 static void v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
365 v9fs_string_free(str
);
368 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
375 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
377 v9fs_string_free(lhs
);
378 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
381 static size_t v9fs_string_size(V9fsString
*str
)
386 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
390 for (f
= s
->fid_list
; f
; f
= f
->next
) {
399 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
403 f
= lookup_fid(s
, fid
);
408 f
= qemu_mallocz(sizeof(V9fsFidState
));
414 f
->next
= s
->fid_list
;
420 static int free_fid(V9fsState
*s
, int32_t fid
)
422 V9fsFidState
**fidpp
, *fidp
;
424 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
425 if ((*fidpp
)->fid
== fid
) {
430 if (*fidpp
== NULL
) {
437 if (fidp
->fd
!= -1) {
438 v9fs_do_close(s
, fidp
->fd
);
441 v9fs_do_closedir(s
, fidp
->dir
);
443 v9fs_string_free(&fidp
->path
);
449 #define P9_QID_TYPE_DIR 0x80
450 #define P9_QID_TYPE_SYMLINK 0x02
452 #define P9_STAT_MODE_DIR 0x80000000
453 #define P9_STAT_MODE_APPEND 0x40000000
454 #define P9_STAT_MODE_EXCL 0x20000000
455 #define P9_STAT_MODE_MOUNT 0x10000000
456 #define P9_STAT_MODE_AUTH 0x08000000
457 #define P9_STAT_MODE_TMP 0x04000000
458 #define P9_STAT_MODE_SYMLINK 0x02000000
459 #define P9_STAT_MODE_LINK 0x01000000
460 #define P9_STAT_MODE_DEVICE 0x00800000
461 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
462 #define P9_STAT_MODE_SOCKET 0x00100000
463 #define P9_STAT_MODE_SETUID 0x00080000
464 #define P9_STAT_MODE_SETGID 0x00040000
465 #define P9_STAT_MODE_SETVTX 0x00010000
467 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
468 P9_STAT_MODE_SYMLINK | \
469 P9_STAT_MODE_LINK | \
470 P9_STAT_MODE_DEVICE | \
471 P9_STAT_MODE_NAMED_PIPE | \
474 /* This is the algorithm from ufs in spfs */
475 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
479 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
480 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
481 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
483 if (S_ISDIR(stbuf
->st_mode
)) {
484 qidp
->type
|= P9_QID_TYPE_DIR
;
486 if (S_ISLNK(stbuf
->st_mode
)) {
487 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
491 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
496 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
501 stat_to_qid(&stbuf
, qidp
);
505 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
509 if (!QLIST_EMPTY(&s
->free_list
)) {
510 pdu
= QLIST_FIRST(&s
->free_list
);
511 QLIST_REMOVE(pdu
, next
);
516 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
519 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
523 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
524 size_t offset
, size_t size
, int pack
)
529 for (i
= 0; size
&& i
< sg_count
; i
++) {
531 if (offset
>= sg
[i
].iov_len
) {
533 offset
-= sg
[i
].iov_len
;
536 len
= MIN(sg
[i
].iov_len
- offset
, size
);
538 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
540 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
555 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
557 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
561 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
564 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
568 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
572 struct iovec
*src_sg
;
576 src_sg
= pdu
->elem
.in_sg
;
577 num
= pdu
->elem
.in_num
;
579 src_sg
= pdu
->elem
.out_sg
;
580 num
= pdu
->elem
.out_num
;
584 for (i
= 0; i
< num
; i
++) {
586 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
587 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
589 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
590 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
591 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
592 sg
[j
].iov_base
+= (offset
- pos
);
593 sg
[j
].iov_len
-= (offset
- pos
);
596 pos
+= src_sg
[i
].iov_len
;
602 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
604 size_t old_offset
= offset
;
609 for (i
= 0; fmt
[i
]; i
++) {
612 uint8_t *valp
= va_arg(ap
, uint8_t *);
613 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
618 valp
= va_arg(ap
, uint16_t *);
619 val
= le16_to_cpupu(valp
);
620 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
626 valp
= va_arg(ap
, uint32_t *);
627 val
= le32_to_cpupu(valp
);
628 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
634 valp
= va_arg(ap
, uint64_t *);
635 val
= le64_to_cpup(valp
);
636 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
641 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
642 int *iovcnt
= va_arg(ap
, int *);
643 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
647 V9fsString
*str
= va_arg(ap
, V9fsString
*);
648 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
649 /* FIXME: sanity check str->size */
650 str
->data
= qemu_malloc(str
->size
+ 1);
651 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
652 str
->data
[str
->size
] = 0;
656 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
657 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
658 &qidp
->type
, &qidp
->version
, &qidp
->path
);
662 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
663 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
664 &statp
->size
, &statp
->type
, &statp
->dev
,
665 &statp
->qid
, &statp
->mode
, &statp
->atime
,
666 &statp
->mtime
, &statp
->length
,
667 &statp
->name
, &statp
->uid
, &statp
->gid
,
668 &statp
->muid
, &statp
->extension
,
669 &statp
->n_uid
, &statp
->n_gid
,
674 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
675 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
676 &iattr
->valid
, &iattr
->mode
,
677 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
678 &iattr
->atime_sec
, &iattr
->atime_nsec
,
679 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
689 return offset
- old_offset
;
692 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
694 size_t old_offset
= offset
;
699 for (i
= 0; fmt
[i
]; i
++) {
702 uint8_t val
= va_arg(ap
, int);
703 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
708 cpu_to_le16w(&val
, va_arg(ap
, int));
709 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
714 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
715 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
720 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
721 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
725 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
726 int *iovcnt
= va_arg(ap
, int *);
727 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
731 V9fsString
*str
= va_arg(ap
, V9fsString
*);
732 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
733 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
737 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
738 offset
+= pdu_marshal(pdu
, offset
, "bdq",
739 qidp
->type
, qidp
->version
, qidp
->path
);
743 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
744 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
745 statp
->size
, statp
->type
, statp
->dev
,
746 &statp
->qid
, statp
->mode
, statp
->atime
,
747 statp
->mtime
, statp
->length
, &statp
->name
,
748 &statp
->uid
, &statp
->gid
, &statp
->muid
,
749 &statp
->extension
, statp
->n_uid
,
750 statp
->n_gid
, statp
->n_muid
);
754 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
755 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
756 statp
->st_result_mask
,
757 &statp
->qid
, statp
->st_mode
,
758 statp
->st_uid
, statp
->st_gid
,
759 statp
->st_nlink
, statp
->st_rdev
,
760 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
761 statp
->st_atime_sec
, statp
->st_atime_nsec
,
762 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
763 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
764 statp
->st_btime_sec
, statp
->st_btime_nsec
,
765 statp
->st_gen
, statp
->st_data_version
);
774 return offset
- old_offset
;
777 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
779 int8_t id
= pdu
->id
+ 1; /* Response */
785 str
.data
= strerror(err
);
786 str
.size
= strlen(str
.data
);
789 len
+= pdu_marshal(pdu
, len
, "s", &str
);
791 len
+= pdu_marshal(pdu
, len
, "d", err
);
797 /* fill out the header */
798 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
800 /* keep these in sync */
804 /* push onto queue and notify */
805 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
807 /* FIXME: we should batch these completions */
808 virtio_notify(&s
->vdev
, s
->vq
);
813 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
818 if (mode
& P9_STAT_MODE_DIR
) {
823 if (mode
& P9_STAT_MODE_SYMLINK
) {
826 if (mode
& P9_STAT_MODE_SOCKET
) {
829 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
832 if (mode
& P9_STAT_MODE_DEVICE
) {
833 if (extension
&& extension
->data
[0] == 'c') {
845 if (mode
& P9_STAT_MODE_SETUID
) {
848 if (mode
& P9_STAT_MODE_SETGID
) {
851 if (mode
& P9_STAT_MODE_SETVTX
) {
858 static int donttouch_stat(V9fsStat
*stat
)
860 if (stat
->type
== -1 &&
862 stat
->qid
.type
== -1 &&
863 stat
->qid
.version
== -1 &&
864 stat
->qid
.path
== -1 &&
868 stat
->length
== -1 &&
875 stat
->n_muid
== -1) {
882 static void v9fs_stat_free(V9fsStat
*stat
)
884 v9fs_string_free(&stat
->name
);
885 v9fs_string_free(&stat
->uid
);
886 v9fs_string_free(&stat
->gid
);
887 v9fs_string_free(&stat
->muid
);
888 v9fs_string_free(&stat
->extension
);
891 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
895 mode
= stbuf
->st_mode
& 0777;
896 if (S_ISDIR(stbuf
->st_mode
)) {
897 mode
|= P9_STAT_MODE_DIR
;
901 if (S_ISLNK(stbuf
->st_mode
)) {
902 mode
|= P9_STAT_MODE_SYMLINK
;
905 if (S_ISSOCK(stbuf
->st_mode
)) {
906 mode
|= P9_STAT_MODE_SOCKET
;
909 if (S_ISFIFO(stbuf
->st_mode
)) {
910 mode
|= P9_STAT_MODE_NAMED_PIPE
;
913 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
914 mode
|= P9_STAT_MODE_DEVICE
;
917 if (stbuf
->st_mode
& S_ISUID
) {
918 mode
|= P9_STAT_MODE_SETUID
;
921 if (stbuf
->st_mode
& S_ISGID
) {
922 mode
|= P9_STAT_MODE_SETGID
;
925 if (stbuf
->st_mode
& S_ISVTX
) {
926 mode
|= P9_STAT_MODE_SETVTX
;
933 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
934 const struct stat
*stbuf
,
940 memset(v9stat
, 0, sizeof(*v9stat
));
942 stat_to_qid(stbuf
, &v9stat
->qid
);
943 v9stat
->mode
= stat_to_v9mode(stbuf
);
944 v9stat
->atime
= stbuf
->st_atime
;
945 v9stat
->mtime
= stbuf
->st_mtime
;
946 v9stat
->length
= stbuf
->st_size
;
948 v9fs_string_null(&v9stat
->uid
);
949 v9fs_string_null(&v9stat
->gid
);
950 v9fs_string_null(&v9stat
->muid
);
953 v9stat
->n_uid
= stbuf
->st_uid
;
954 v9stat
->n_gid
= stbuf
->st_gid
;
957 v9fs_string_null(&v9stat
->extension
);
959 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
960 err
= v9fs_do_readlink(s
, name
, &v9stat
->extension
);
965 v9stat
->extension
.data
[err
] = 0;
966 v9stat
->extension
.size
= err
;
967 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
968 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
969 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
970 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
971 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
972 v9fs_string_sprintf(&v9stat
->extension
, "%s %u",
973 "HARDLINKCOUNT", stbuf
->st_nlink
);
977 str
= strrchr(name
->data
, '/');
984 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
987 v9fs_string_size(&v9stat
->name
) +
988 v9fs_string_size(&v9stat
->uid
) +
989 v9fs_string_size(&v9stat
->gid
) +
990 v9fs_string_size(&v9stat
->muid
) +
991 v9fs_string_size(&v9stat
->extension
);
995 #define P9_STATS_MODE 0x00000001ULL
996 #define P9_STATS_NLINK 0x00000002ULL
997 #define P9_STATS_UID 0x00000004ULL
998 #define P9_STATS_GID 0x00000008ULL
999 #define P9_STATS_RDEV 0x00000010ULL
1000 #define P9_STATS_ATIME 0x00000020ULL
1001 #define P9_STATS_MTIME 0x00000040ULL
1002 #define P9_STATS_CTIME 0x00000080ULL
1003 #define P9_STATS_INO 0x00000100ULL
1004 #define P9_STATS_SIZE 0x00000200ULL
1005 #define P9_STATS_BLOCKS 0x00000400ULL
1007 #define P9_STATS_BTIME 0x00000800ULL
1008 #define P9_STATS_GEN 0x00001000ULL
1009 #define P9_STATS_DATA_VERSION 0x00002000ULL
1011 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1012 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1015 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1016 V9fsStatDotl
*v9lstat
)
1018 memset(v9lstat
, 0, sizeof(*v9lstat
));
1020 v9lstat
->st_mode
= stbuf
->st_mode
;
1021 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1022 v9lstat
->st_uid
= stbuf
->st_uid
;
1023 v9lstat
->st_gid
= stbuf
->st_gid
;
1024 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1025 v9lstat
->st_size
= stbuf
->st_size
;
1026 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1027 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1028 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1029 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1030 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1031 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1032 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1033 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1034 /* Currently we only support BASIC fields in stat */
1035 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1037 stat_to_qid(stbuf
, &v9lstat
->qid
);
1040 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1042 while (len
&& *iovcnt
) {
1043 if (len
< sg
->iov_len
) {
1045 sg
->iov_base
+= len
;
1057 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1062 for (i
= 0; i
< *cnt
; i
++) {
1063 if ((total
+ sg
[i
].iov_len
) > cap
) {
1064 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1068 total
+= sg
[i
].iov_len
;
1076 static void print_sg(struct iovec
*sg
, int cnt
)
1080 printf("sg[%d]: {", cnt
);
1081 for (i
= 0; i
< cnt
; i
++) {
1085 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1090 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1093 v9fs_string_init(&str
);
1094 v9fs_string_copy(&str
, dst
);
1095 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1096 v9fs_string_free(&str
);
1099 static void v9fs_version(V9fsState
*s
, V9fsPDU
*pdu
)
1104 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1106 if (!strcmp(version
.data
, "9P2000.u")) {
1107 s
->proto_version
= V9FS_PROTO_2000U
;
1108 } else if (!strcmp(version
.data
, "9P2000.L")) {
1109 s
->proto_version
= V9FS_PROTO_2000L
;
1111 v9fs_string_sprintf(&version
, "unknown");
1114 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1115 complete_pdu(s
, pdu
, offset
);
1117 v9fs_string_free(&version
);
1120 static void v9fs_attach(V9fsState
*s
, V9fsPDU
*pdu
)
1122 int32_t fid
, afid
, n_uname
;
1123 V9fsString uname
, aname
;
1129 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1131 fidp
= alloc_fid(s
, fid
);
1137 fidp
->uid
= n_uname
;
1139 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1140 err
= fid_to_qid(s
, fidp
, &qid
);
1147 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1151 complete_pdu(s
, pdu
, err
);
1152 v9fs_string_free(&uname
);
1153 v9fs_string_free(&aname
);
1156 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1163 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1167 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1171 complete_pdu(s
, vs
->pdu
, err
);
1172 v9fs_stat_free(&vs
->v9stat
);
1176 static void v9fs_stat(V9fsState
*s
, V9fsPDU
*pdu
)
1182 vs
= qemu_malloc(sizeof(*vs
));
1186 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1188 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1190 vs
->fidp
= lookup_fid(s
, fid
);
1191 if (vs
->fidp
== NULL
) {
1196 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1197 v9fs_stat_post_lstat(s
, vs
, err
);
1201 complete_pdu(s
, vs
->pdu
, err
);
1202 v9fs_stat_free(&vs
->v9stat
);
1206 static void v9fs_getattr_post_lstat(V9fsState
*s
, V9fsStatStateDotl
*vs
,
1214 stat_to_v9stat_dotl(s
, &vs
->stbuf
, &vs
->v9stat_dotl
);
1215 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "A", &vs
->v9stat_dotl
);
1219 complete_pdu(s
, vs
->pdu
, err
);
1223 static void v9fs_getattr(V9fsState
*s
, V9fsPDU
*pdu
)
1226 V9fsStatStateDotl
*vs
;
1229 uint64_t request_mask
;
1231 vs
= qemu_malloc(sizeof(*vs
));
1235 memset(&vs
->v9stat_dotl
, 0, sizeof(vs
->v9stat_dotl
));
1237 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dq", &fid
, &request_mask
);
1239 fidp
= lookup_fid(s
, fid
);
1245 /* Currently we only support BASIC fields in stat, so there is no
1246 * need to look at request_mask.
1248 err
= v9fs_do_lstat(s
, &fidp
->path
, &vs
->stbuf
);
1249 v9fs_getattr_post_lstat(s
, vs
, err
);
1253 complete_pdu(s
, vs
->pdu
, err
);
1257 /* From Linux kernel code */
1258 #define ATTR_MODE (1 << 0)
1259 #define ATTR_UID (1 << 1)
1260 #define ATTR_GID (1 << 2)
1261 #define ATTR_SIZE (1 << 3)
1262 #define ATTR_ATIME (1 << 4)
1263 #define ATTR_MTIME (1 << 5)
1264 #define ATTR_CTIME (1 << 6)
1265 #define ATTR_MASK 127
1266 #define ATTR_ATIME_SET (1 << 7)
1267 #define ATTR_MTIME_SET (1 << 8)
1269 static void v9fs_setattr_post_truncate(V9fsState
*s
, V9fsSetattrState
*vs
,
1279 complete_pdu(s
, vs
->pdu
, err
);
1283 static void v9fs_setattr_post_chown(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1290 if (vs
->v9iattr
.valid
& (ATTR_SIZE
)) {
1291 err
= v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9iattr
.size
);
1293 v9fs_setattr_post_truncate(s
, vs
, err
);
1297 complete_pdu(s
, vs
->pdu
, err
);
1301 static void v9fs_setattr_post_utimensat(V9fsState
*s
, V9fsSetattrState
*vs
,
1309 /* If the only valid entry in iattr is ctime we can call
1310 * chown(-1,-1) to update the ctime of the file
1312 if ((vs
->v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1313 ((vs
->v9iattr
.valid
& ATTR_CTIME
)
1314 && !((vs
->v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1315 if (!(vs
->v9iattr
.valid
& ATTR_UID
)) {
1316 vs
->v9iattr
.uid
= -1;
1318 if (!(vs
->v9iattr
.valid
& ATTR_GID
)) {
1319 vs
->v9iattr
.gid
= -1;
1321 err
= v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9iattr
.uid
,
1324 v9fs_setattr_post_chown(s
, vs
, err
);
1328 complete_pdu(s
, vs
->pdu
, err
);
1332 static void v9fs_setattr_post_chmod(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1339 if (vs
->v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1340 struct timespec times
[2];
1341 if (vs
->v9iattr
.valid
& ATTR_ATIME
) {
1342 if (vs
->v9iattr
.valid
& ATTR_ATIME_SET
) {
1343 times
[0].tv_sec
= vs
->v9iattr
.atime_sec
;
1344 times
[0].tv_nsec
= vs
->v9iattr
.atime_nsec
;
1346 times
[0].tv_nsec
= UTIME_NOW
;
1349 times
[0].tv_nsec
= UTIME_OMIT
;
1352 if (vs
->v9iattr
.valid
& ATTR_MTIME
) {
1353 if (vs
->v9iattr
.valid
& ATTR_MTIME_SET
) {
1354 times
[1].tv_sec
= vs
->v9iattr
.mtime_sec
;
1355 times
[1].tv_nsec
= vs
->v9iattr
.mtime_nsec
;
1357 times
[1].tv_nsec
= UTIME_NOW
;
1360 times
[1].tv_nsec
= UTIME_OMIT
;
1362 err
= v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
);
1364 v9fs_setattr_post_utimensat(s
, vs
, err
);
1368 complete_pdu(s
, vs
->pdu
, err
);
1372 static void v9fs_setattr(V9fsState
*s
, V9fsPDU
*pdu
)
1375 V9fsSetattrState
*vs
;
1378 vs
= qemu_malloc(sizeof(*vs
));
1382 pdu_unmarshal(pdu
, vs
->offset
, "dI", &fid
, &vs
->v9iattr
);
1384 vs
->fidp
= lookup_fid(s
, fid
);
1385 if (vs
->fidp
== NULL
) {
1390 if (vs
->v9iattr
.valid
& ATTR_MODE
) {
1391 err
= v9fs_do_chmod(s
, &vs
->fidp
->path
, vs
->v9iattr
.mode
);
1394 v9fs_setattr_post_chmod(s
, vs
, err
);
1398 complete_pdu(s
, vs
->pdu
, err
);
1402 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1404 complete_pdu(s
, vs
->pdu
, err
);
1407 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1408 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1411 qemu_free(vs
->wnames
);
1412 qemu_free(vs
->qids
);
1416 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1420 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1422 for (i
= 0; i
< vs
->nwnames
; i
++) {
1423 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1427 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1431 free_fid(s
, vs
->newfidp
->fid
);
1432 v9fs_string_free(&vs
->path
);
1437 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1440 if (vs
->name_idx
< vs
->nwnames
) {
1441 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1442 vs
->wnames
[vs
->name_idx
].data
);
1443 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1445 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1446 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1450 v9fs_string_free(&vs
->path
);
1451 v9fs_walk_marshal(vs
);
1454 v9fs_walk_complete(s
, vs
, err
);
1457 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1461 v9fs_string_free(&vs
->path
);
1466 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1468 if (vs
->name_idx
< vs
->nwnames
) {
1470 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1471 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1472 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1474 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1475 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1479 v9fs_string_free(&vs
->path
);
1480 v9fs_walk_marshal(vs
);
1483 v9fs_walk_complete(s
, vs
, err
);
1486 static void v9fs_walk(V9fsState
*s
, V9fsPDU
*pdu
)
1488 int32_t fid
, newfid
;
1493 vs
= qemu_malloc(sizeof(*vs
));
1499 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1500 &newfid
, &vs
->nwnames
);
1503 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1505 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1507 for (i
= 0; i
< vs
->nwnames
; i
++) {
1508 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1513 vs
->fidp
= lookup_fid(s
, fid
);
1514 if (vs
->fidp
== NULL
) {
1519 /* FIXME: is this really valid? */
1520 if (fid
== newfid
) {
1522 BUG_ON(vs
->fidp
->fd
!= -1);
1523 BUG_ON(vs
->fidp
->dir
);
1524 v9fs_string_init(&vs
->path
);
1527 if (vs
->name_idx
< vs
->nwnames
) {
1528 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1529 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1530 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1532 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1533 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1537 vs
->newfidp
= alloc_fid(s
, newfid
);
1538 if (vs
->newfidp
== NULL
) {
1543 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1544 v9fs_string_init(&vs
->path
);
1546 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1548 if (vs
->name_idx
< vs
->nwnames
) {
1549 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1550 vs
->wnames
[vs
->name_idx
].data
);
1551 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1553 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1554 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1559 v9fs_walk_marshal(vs
);
1562 v9fs_walk_complete(s
, vs
, err
);
1565 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1567 struct statfs stbuf
;
1571 * iounit should be multiples of f_bsize (host filesystem block size
1572 * and as well as less than (client msize - P9_IOHDRSZ))
1574 if (!v9fs_do_statfs(s
, name
, &stbuf
)) {
1575 iounit
= stbuf
.f_bsize
;
1576 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1580 iounit
= s
->msize
- P9_IOHDRSZ
;
1585 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1587 if (vs
->fidp
->dir
== NULL
) {
1592 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1595 complete_pdu(s
, vs
->pdu
, err
);
1600 static void v9fs_open_post_getiounit(V9fsState
*s
, V9fsOpenState
*vs
)
1603 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
1605 complete_pdu(s
, vs
->pdu
, err
);
1609 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1611 if (vs
->fidp
->fd
== -1) {
1616 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
1617 v9fs_open_post_getiounit(s
, vs
);
1620 complete_pdu(s
, vs
->pdu
, err
);
1624 static inline int valid_flags(int flag
)
1626 if (flag
& O_NOCTTY
|| flag
& O_NONBLOCK
|| flag
& O_ASYNC
||
1633 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1642 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1644 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1645 vs
->fidp
->dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1646 v9fs_open_post_opendir(s
, vs
, err
);
1648 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1649 if (!valid_flags(vs
->mode
)) {
1655 flags
= omode_to_uflags(vs
->mode
);
1657 vs
->fidp
->fd
= v9fs_do_open(s
, &vs
->fidp
->path
, flags
);
1658 v9fs_open_post_open(s
, vs
, err
);
1662 complete_pdu(s
, vs
->pdu
, err
);
1666 static void v9fs_open(V9fsState
*s
, V9fsPDU
*pdu
)
1672 vs
= qemu_malloc(sizeof(*vs
));
1677 if (s
->proto_version
== V9FS_PROTO_2000L
) {
1678 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dd", &fid
, &vs
->mode
);
1680 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1683 vs
->fidp
= lookup_fid(s
, fid
);
1684 if (vs
->fidp
== NULL
) {
1689 BUG_ON(vs
->fidp
->fd
!= -1);
1690 BUG_ON(vs
->fidp
->dir
);
1692 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1694 v9fs_open_post_lstat(s
, vs
, err
);
1697 complete_pdu(s
, pdu
, err
);
1701 static void v9fs_post_lcreate(V9fsState
*s
, V9fsLcreateState
*vs
, int err
)
1704 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
1705 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1706 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
,
1713 complete_pdu(s
, vs
->pdu
, err
);
1714 v9fs_string_free(&vs
->name
);
1715 v9fs_string_free(&vs
->fullname
);
1719 static void v9fs_lcreate_post_get_iounit(V9fsState
*s
, V9fsLcreateState
*vs
,
1726 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1729 v9fs_post_lcreate(s
, vs
, err
);
1732 static void v9fs_lcreate_post_do_open2(V9fsState
*s
, V9fsLcreateState
*vs
,
1735 if (vs
->fidp
->fd
== -1) {
1739 vs
->iounit
= get_iounit(s
, &vs
->fullname
);
1740 v9fs_lcreate_post_get_iounit(s
, vs
, err
);
1744 v9fs_post_lcreate(s
, vs
, err
);
1747 static void v9fs_lcreate(V9fsState
*s
, V9fsPDU
*pdu
)
1749 int32_t dfid
, flags
, mode
;
1751 V9fsLcreateState
*vs
;
1754 vs
= qemu_malloc(sizeof(*vs
));
1758 v9fs_string_init(&vs
->fullname
);
1760 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsddd", &dfid
, &vs
->name
, &flags
,
1763 vs
->fidp
= lookup_fid(s
, dfid
);
1764 if (vs
->fidp
== NULL
) {
1769 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
1772 vs
->fidp
->fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
1774 v9fs_lcreate_post_do_open2(s
, vs
, err
);
1778 complete_pdu(s
, vs
->pdu
, err
);
1779 v9fs_string_free(&vs
->name
);
1783 static void v9fs_clunk(V9fsState
*s
, V9fsPDU
*pdu
)
1789 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1791 err
= free_fid(s
, fid
);
1799 complete_pdu(s
, pdu
, err
);
1802 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1804 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1809 v9fs_stat_free(&vs
->v9stat
);
1810 v9fs_string_free(&vs
->name
);
1811 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1812 vs
->offset
+= vs
->count
;
1815 complete_pdu(s
, vs
->pdu
, err
);
1820 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1827 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1832 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1834 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1835 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1836 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->dir_pos
);
1837 v9fs_read_post_seekdir(s
, vs
, err
);
1840 vs
->count
+= vs
->len
;
1841 v9fs_stat_free(&vs
->v9stat
);
1842 v9fs_string_free(&vs
->name
);
1843 vs
->dir_pos
= vs
->dent
->d_off
;
1844 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1845 v9fs_read_post_readdir(s
, vs
, err
);
1848 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->dir_pos
);
1849 v9fs_read_post_seekdir(s
, vs
, err
);
1854 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1857 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1858 v9fs_string_init(&vs
->name
);
1859 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1861 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1862 v9fs_read_post_dir_lstat(s
, vs
, err
);
1866 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1867 vs
->offset
+= vs
->count
;
1869 complete_pdu(s
, vs
->pdu
, err
);
1874 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1876 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1877 v9fs_read_post_readdir(s
, vs
, err
);
1881 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1884 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->dir
);
1885 v9fs_read_post_telldir(s
, vs
, err
);
1889 static void v9fs_read_post_readv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1892 /* IO error return the error */
1896 vs
->total
+= vs
->len
;
1897 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1898 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1901 print_sg(vs
->sg
, vs
->cnt
);
1903 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1904 } while (vs
->len
== -1 && errno
== EINTR
);
1905 if (vs
->len
== -1) {
1908 v9fs_read_post_readv(s
, vs
, err
);
1911 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1912 vs
->offset
+= vs
->count
;
1916 complete_pdu(s
, vs
->pdu
, err
);
1920 static void v9fs_read_post_lseek(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1926 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1928 if (vs
->total
< vs
->count
) {
1931 print_sg(vs
->sg
, vs
->cnt
);
1933 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1934 } while (vs
->len
== -1 && errno
== EINTR
);
1935 if (vs
->len
== -1) {
1938 v9fs_read_post_readv(s
, vs
, err
);
1942 complete_pdu(s
, vs
->pdu
, err
);
1946 static void v9fs_read(V9fsState
*s
, V9fsPDU
*pdu
)
1952 vs
= qemu_malloc(sizeof(*vs
));
1959 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1961 vs
->fidp
= lookup_fid(s
, fid
);
1962 if (vs
->fidp
== NULL
) {
1967 if (vs
->fidp
->dir
) {
1968 vs
->max_count
= vs
->count
;
1971 v9fs_do_rewinddir(s
, vs
->fidp
->dir
);
1973 v9fs_read_post_rewinddir(s
, vs
, err
);
1975 } else if (vs
->fidp
->fd
!= -1) {
1977 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
1978 err
= v9fs_do_lseek(s
, vs
->fidp
->fd
, vs
->off
, SEEK_SET
);
1979 v9fs_read_post_lseek(s
, vs
, err
);
1985 complete_pdu(s
, pdu
, err
);
1989 typedef struct V9fsReadDirState
{
1993 off_t saved_dir_pos
;
1994 struct dirent
*dent
;
1998 int64_t initial_offset
;
2002 static void v9fs_readdir_post_seekdir(V9fsState
*s
, V9fsReadDirState
*vs
)
2004 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
2005 vs
->offset
+= vs
->count
;
2006 complete_pdu(s
, vs
->pdu
, vs
->offset
);
2011 /* Size of each dirent on the wire: size of qid (13) + size of offset (8)
2012 * size of type (1) + size of name.size (2) + strlen(name.data)
2014 #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
2016 static void v9fs_readdir_post_readdir(V9fsState
*s
, V9fsReadDirState
*vs
)
2022 v9fs_string_init(&vs
->name
);
2023 v9fs_string_sprintf(&vs
->name
, "%s", vs
->dent
->d_name
);
2025 if ((vs
->count
+ V9_READDIR_DATA_SZ
) > vs
->max_count
) {
2026 /* Ran out of buffer. Set dir back to old position and return */
2027 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->saved_dir_pos
);
2028 v9fs_readdir_post_seekdir(s
, vs
);
2032 /* Fill up just the path field of qid because the client uses
2033 * only that. To fill the entire qid structure we will have
2034 * to stat each dirent found, which is expensive
2036 size
= MIN(sizeof(vs
->dent
->d_ino
), sizeof(vs
->qid
.path
));
2037 memcpy(&vs
->qid
.path
, &vs
->dent
->d_ino
, size
);
2038 /* Fill the other fields with dummy values */
2040 vs
->qid
.version
= 0;
2042 len
= pdu_marshal(vs
->pdu
, vs
->offset
+4+vs
->count
, "Qqbs",
2043 &vs
->qid
, vs
->dent
->d_off
,
2044 vs
->dent
->d_type
, &vs
->name
);
2046 v9fs_string_free(&vs
->name
);
2047 vs
->saved_dir_pos
= vs
->dent
->d_off
;
2048 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
2049 v9fs_readdir_post_readdir(s
, vs
);
2053 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
2054 vs
->offset
+= vs
->count
;
2055 complete_pdu(s
, vs
->pdu
, vs
->offset
);
2060 static void v9fs_readdir_post_telldir(V9fsState
*s
, V9fsReadDirState
*vs
)
2062 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
2063 v9fs_readdir_post_readdir(s
, vs
);
2067 static void v9fs_readdir_post_setdir(V9fsState
*s
, V9fsReadDirState
*vs
)
2069 vs
->saved_dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->dir
);
2070 v9fs_readdir_post_telldir(s
, vs
);
2074 static void v9fs_readdir(V9fsState
*s
, V9fsPDU
*pdu
)
2077 V9fsReadDirState
*vs
;
2081 vs
= qemu_malloc(sizeof(*vs
));
2086 pdu_unmarshal(vs
->pdu
, offset
, "dqd", &fid
, &vs
->initial_offset
,
2089 vs
->fidp
= lookup_fid(s
, fid
);
2090 if (vs
->fidp
== NULL
|| !(vs
->fidp
->dir
)) {
2095 if (vs
->initial_offset
== 0) {
2096 v9fs_do_rewinddir(s
, vs
->fidp
->dir
);
2098 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->initial_offset
);
2101 v9fs_readdir_post_setdir(s
, vs
);
2105 complete_pdu(s
, pdu
, err
);
2110 static void v9fs_write_post_writev(V9fsState
*s
, V9fsWriteState
*vs
,
2114 /* IO error return the error */
2118 vs
->total
+= vs
->len
;
2119 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2120 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2123 print_sg(vs
->sg
, vs
->cnt
);
2125 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
2126 } while (vs
->len
== -1 && errno
== EINTR
);
2127 if (vs
->len
== -1) {
2130 v9fs_write_post_writev(s
, vs
, err
);
2133 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2137 complete_pdu(s
, vs
->pdu
, err
);
2141 static void v9fs_write_post_lseek(V9fsState
*s
, V9fsWriteState
*vs
, ssize_t err
)
2147 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2149 if (vs
->total
< vs
->count
) {
2152 print_sg(vs
->sg
, vs
->cnt
);
2154 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
2155 } while (vs
->len
== -1 && errno
== EINTR
);
2156 if (vs
->len
== -1) {
2159 v9fs_write_post_writev(s
, vs
, err
);
2164 complete_pdu(s
, vs
->pdu
, err
);
2168 static void v9fs_write(V9fsState
*s
, V9fsPDU
*pdu
)
2174 vs
= qemu_malloc(sizeof(*vs
));
2182 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2185 vs
->fidp
= lookup_fid(s
, fid
);
2186 if (vs
->fidp
== NULL
) {
2191 if (vs
->fidp
->fd
== -1) {
2196 err
= v9fs_do_lseek(s
, vs
->fidp
->fd
, vs
->off
, SEEK_SET
);
2198 v9fs_write_post_lseek(s
, vs
, err
);
2202 complete_pdu(s
, vs
->pdu
, err
);
2206 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2209 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2210 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2212 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2215 complete_pdu(s
, vs
->pdu
, err
);
2216 v9fs_string_free(&vs
->name
);
2217 v9fs_string_free(&vs
->extension
);
2218 v9fs_string_free(&vs
->fullname
);
2222 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2225 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2226 v9fs_create_post_getiounit(s
, vs
);
2230 complete_pdu(s
, vs
->pdu
, err
);
2231 v9fs_string_free(&vs
->name
);
2232 v9fs_string_free(&vs
->extension
);
2233 v9fs_string_free(&vs
->fullname
);
2237 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2242 v9fs_post_create(s
, vs
, err
);
2245 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2248 if (!vs
->fidp
->dir
) {
2251 v9fs_post_create(s
, vs
, err
);
2254 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2262 vs
->fidp
->dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2263 v9fs_create_post_opendir(s
, vs
, err
);
2267 v9fs_post_create(s
, vs
, err
);
2270 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2277 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2278 v9fs_create_post_dir_lstat(s
, vs
, err
);
2282 v9fs_post_create(s
, vs
, err
);
2285 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2292 v9fs_post_create(s
, vs
, err
);
2296 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2298 if (vs
->fidp
->fd
== -1) {
2303 err
= v9fs_do_fstat(s
, vs
->fidp
->fd
, &vs
->stbuf
);
2304 v9fs_create_post_fstat(s
, vs
, err
);
2309 v9fs_post_create(s
, vs
, err
);
2313 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2316 if (err
== 0 || errno
!= ENOENT
) {
2321 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2322 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, vs
->perm
& 0777,
2324 v9fs_create_post_mkdir(s
, vs
, err
);
2325 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2326 err
= v9fs_do_symlink(s
, vs
->fidp
, vs
->extension
.data
,
2327 vs
->fullname
.data
, -1);
2328 v9fs_create_post_perms(s
, vs
, err
);
2329 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2330 int32_t nfid
= atoi(vs
->extension
.data
);
2331 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2332 if (nfidp
== NULL
) {
2334 v9fs_post_create(s
, vs
, err
);
2336 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2337 v9fs_create_post_perms(s
, vs
, err
);
2338 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2340 uint32_t major
, minor
;
2343 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2346 v9fs_post_create(s
, vs
, err
);
2358 v9fs_post_create(s
, vs
, err
);
2361 nmode
|= vs
->perm
& 0777;
2362 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, nmode
,
2363 makedev(major
, minor
), vs
->fidp
->uid
, -1);
2364 v9fs_create_post_perms(s
, vs
, err
);
2365 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2366 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFIFO
| (vs
->perm
& 0777),
2367 0, vs
->fidp
->uid
, -1);
2368 v9fs_post_create(s
, vs
, err
);
2369 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2370 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, S_IFSOCK
| (vs
->perm
& 0777),
2371 0, vs
->fidp
->uid
, -1);
2372 v9fs_post_create(s
, vs
, err
);
2374 vs
->fidp
->fd
= v9fs_do_open2(s
, vs
->fullname
.data
, vs
->fidp
->uid
,
2375 -1, omode_to_uflags(vs
->mode
)|O_CREAT
, vs
->perm
);
2377 v9fs_create_post_open2(s
, vs
, err
);
2383 v9fs_post_create(s
, vs
, err
);
2386 static void v9fs_create(V9fsState
*s
, V9fsPDU
*pdu
)
2389 V9fsCreateState
*vs
;
2392 vs
= qemu_malloc(sizeof(*vs
));
2396 v9fs_string_init(&vs
->fullname
);
2398 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2399 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2401 vs
->fidp
= lookup_fid(s
, fid
);
2402 if (vs
->fidp
== NULL
) {
2407 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2410 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2411 v9fs_create_post_lstat(s
, vs
, err
);
2415 complete_pdu(s
, vs
->pdu
, err
);
2416 v9fs_string_free(&vs
->name
);
2417 v9fs_string_free(&vs
->extension
);
2421 static void v9fs_post_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
, int err
)
2424 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2425 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2430 complete_pdu(s
, vs
->pdu
, err
);
2431 v9fs_string_free(&vs
->name
);
2432 v9fs_string_free(&vs
->symname
);
2433 v9fs_string_free(&vs
->fullname
);
2437 static void v9fs_symlink_post_do_symlink(V9fsState
*s
, V9fsSymlinkState
*vs
,
2443 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2445 v9fs_post_symlink(s
, vs
, err
);
2448 static void v9fs_symlink(V9fsState
*s
, V9fsPDU
*pdu
)
2451 V9fsSymlinkState
*vs
;
2455 vs
= qemu_malloc(sizeof(*vs
));
2459 v9fs_string_init(&vs
->fullname
);
2461 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dssd", &dfid
, &vs
->name
,
2462 &vs
->symname
, &gid
);
2464 vs
->dfidp
= lookup_fid(s
, dfid
);
2465 if (vs
->dfidp
== NULL
) {
2470 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->dfidp
->path
.data
,
2472 err
= v9fs_do_symlink(s
, vs
->dfidp
, vs
->symname
.data
,
2473 vs
->fullname
.data
, gid
);
2474 v9fs_symlink_post_do_symlink(s
, vs
, err
);
2478 complete_pdu(s
, vs
->pdu
, err
);
2479 v9fs_string_free(&vs
->name
);
2480 v9fs_string_free(&vs
->symname
);
2484 static void v9fs_flush(V9fsState
*s
, V9fsPDU
*pdu
)
2486 /* A nop call with no return */
2487 complete_pdu(s
, pdu
, 7);
2490 static void v9fs_link(V9fsState
*s
, V9fsPDU
*pdu
)
2492 int32_t dfid
, oldfid
;
2493 V9fsFidState
*dfidp
, *oldfidp
;
2494 V9fsString name
, fullname
;
2498 v9fs_string_init(&fullname
);
2500 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2502 dfidp
= lookup_fid(s
, dfid
);
2503 if (dfidp
== NULL
) {
2508 oldfidp
= lookup_fid(s
, oldfid
);
2509 if (oldfidp
== NULL
) {
2514 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2516 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2520 v9fs_string_free(&fullname
);
2523 v9fs_string_free(&name
);
2524 complete_pdu(s
, pdu
, err
);
2527 static void v9fs_remove_post_remove(V9fsState
*s
, V9fsRemoveState
*vs
,
2536 /* For TREMOVE we need to clunk the fid even on failed remove */
2537 free_fid(s
, vs
->fidp
->fid
);
2539 complete_pdu(s
, vs
->pdu
, err
);
2543 static void v9fs_remove(V9fsState
*s
, V9fsPDU
*pdu
)
2546 V9fsRemoveState
*vs
;
2549 vs
= qemu_malloc(sizeof(*vs
));
2553 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
2555 vs
->fidp
= lookup_fid(s
, fid
);
2556 if (vs
->fidp
== NULL
) {
2561 err
= v9fs_do_remove(s
, &vs
->fidp
->path
);
2562 v9fs_remove_post_remove(s
, vs
, err
);
2566 complete_pdu(s
, pdu
, err
);
2570 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2579 v9fs_stat_free(&vs
->v9stat
);
2580 complete_pdu(s
, vs
->pdu
, err
);
2584 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2589 if (vs
->v9stat
.length
!= -1) {
2590 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2594 v9fs_wstat_post_truncate(s
, vs
, err
);
2598 v9fs_stat_free(&vs
->v9stat
);
2599 complete_pdu(s
, vs
->pdu
, err
);
2603 static int v9fs_complete_rename(V9fsState
*s
, V9fsRenameState
*vs
)
2606 char *old_name
, *new_name
;
2609 if (vs
->newdirfid
!= -1) {
2610 V9fsFidState
*dirfidp
;
2611 dirfidp
= lookup_fid(s
, vs
->newdirfid
);
2613 if (dirfidp
== NULL
) {
2618 BUG_ON(dirfidp
->fd
!= -1);
2619 BUG_ON(dirfidp
->dir
);
2621 new_name
= qemu_mallocz(dirfidp
->path
.size
+ vs
->name
.size
+ 2);
2623 strcpy(new_name
, dirfidp
->path
.data
);
2624 strcat(new_name
, "/");
2625 strcat(new_name
+ dirfidp
->path
.size
, vs
->name
.data
);
2627 old_name
= vs
->fidp
->path
.data
;
2628 end
= strrchr(old_name
, '/');
2634 new_name
= qemu_mallocz(end
- old_name
+ vs
->name
.size
+ 1);
2636 strncat(new_name
, old_name
, end
- old_name
);
2637 strncat(new_name
+ (end
- old_name
), vs
->name
.data
, vs
->name
.size
);
2640 v9fs_string_free(&vs
->name
);
2641 vs
->name
.data
= qemu_strdup(new_name
);
2642 vs
->name
.size
= strlen(new_name
);
2644 if (strcmp(new_name
, vs
->fidp
->path
.data
) != 0) {
2645 if (v9fs_do_rename(s
, &vs
->fidp
->path
, &vs
->name
)) {
2650 * Fixup fid's pointing to the old name to
2651 * start pointing to the new name
2653 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
2654 if (vs
->fidp
== fidp
) {
2656 * we replace name of this fid towards the end
2657 * so that our below strcmp will work
2661 if (!strncmp(vs
->fidp
->path
.data
, fidp
->path
.data
,
2662 strlen(vs
->fidp
->path
.data
))) {
2663 /* replace the name */
2664 v9fs_fix_path(&fidp
->path
, &vs
->name
,
2665 strlen(vs
->fidp
->path
.data
));
2668 v9fs_string_copy(&vs
->fidp
->path
, &vs
->name
);
2672 v9fs_string_free(&vs
->name
);
2676 static void v9fs_rename_post_rename(V9fsState
*s
, V9fsRenameState
*vs
, int err
)
2678 complete_pdu(s
, vs
->pdu
, err
);
2682 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2688 if (vs
->v9stat
.name
.size
!= 0) {
2689 V9fsRenameState
*vr
;
2691 vr
= qemu_malloc(sizeof(V9fsRenameState
));
2692 memset(vr
, sizeof(*vr
), 0);
2695 vr
->fidp
= vs
->fidp
;
2696 vr
->offset
= vs
->offset
;
2697 vr
->name
.size
= vs
->v9stat
.name
.size
;
2698 vr
->name
.data
= qemu_strdup(vs
->v9stat
.name
.data
);
2700 err
= v9fs_complete_rename(s
, vr
);
2703 v9fs_wstat_post_rename(s
, vs
, err
);
2707 v9fs_stat_free(&vs
->v9stat
);
2708 complete_pdu(s
, vs
->pdu
, err
);
2712 static void v9fs_rename(V9fsState
*s
, V9fsPDU
*pdu
)
2715 V9fsRenameState
*vs
;
2718 vs
= qemu_malloc(sizeof(*vs
));
2722 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dds", &fid
, &vs
->newdirfid
, &vs
->name
);
2724 vs
->fidp
= lookup_fid(s
, fid
);
2725 if (vs
->fidp
== NULL
) {
2730 BUG_ON(vs
->fidp
->fd
!= -1);
2731 BUG_ON(vs
->fidp
->dir
);
2733 err
= v9fs_complete_rename(s
, vs
);
2734 v9fs_rename_post_rename(s
, vs
, err
);
2737 complete_pdu(s
, vs
->pdu
, err
);
2741 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2747 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2748 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2749 vs
->v9stat
.n_gid
)) {
2753 v9fs_wstat_post_chown(s
, vs
, err
);
2757 v9fs_stat_free(&vs
->v9stat
);
2758 complete_pdu(s
, vs
->pdu
, err
);
2762 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2768 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2769 struct timespec times
[2];
2770 if (vs
->v9stat
.atime
!= -1) {
2771 times
[0].tv_sec
= vs
->v9stat
.atime
;
2772 times
[0].tv_nsec
= 0;
2774 times
[0].tv_nsec
= UTIME_OMIT
;
2776 if (vs
->v9stat
.mtime
!= -1) {
2777 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2778 times
[1].tv_nsec
= 0;
2780 times
[1].tv_nsec
= UTIME_OMIT
;
2783 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2788 v9fs_wstat_post_utime(s
, vs
, err
);
2792 v9fs_stat_free(&vs
->v9stat
);
2793 complete_pdu(s
, vs
->pdu
, err
);
2797 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2802 v9fs_stat_free(&vs
->v9stat
);
2803 complete_pdu(s
, vs
->pdu
, err
);
2807 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2816 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2818 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2819 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2820 /* Attempting to change the type */
2825 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2826 &vs
->v9stat
.extension
))) {
2829 v9fs_wstat_post_chmod(s
, vs
, err
);
2833 v9fs_stat_free(&vs
->v9stat
);
2834 complete_pdu(s
, vs
->pdu
, err
);
2838 static void v9fs_wstat(V9fsState
*s
, V9fsPDU
*pdu
)
2844 vs
= qemu_malloc(sizeof(*vs
));
2848 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2850 vs
->fidp
= lookup_fid(s
, fid
);
2851 if (vs
->fidp
== NULL
) {
2856 /* do we need to sync the file? */
2857 if (donttouch_stat(&vs
->v9stat
)) {
2858 err
= v9fs_do_fsync(s
, vs
->fidp
->fd
);
2859 v9fs_wstat_post_fsync(s
, vs
, err
);
2863 if (vs
->v9stat
.mode
!= -1) {
2864 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2865 v9fs_wstat_post_lstat(s
, vs
, err
);
2869 v9fs_wstat_post_chmod(s
, vs
, err
);
2873 v9fs_stat_free(&vs
->v9stat
);
2874 complete_pdu(s
, vs
->pdu
, err
);
2878 static void v9fs_statfs_post_statfs(V9fsState
*s
, V9fsStatfsState
*vs
, int err
)
2880 int32_t bsize_factor
;
2888 * compute bsize factor based on host file system block size
2891 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/vs
->stbuf
.f_bsize
;
2892 if (!bsize_factor
) {
2895 vs
->v9statfs
.f_type
= vs
->stbuf
.f_type
;
2896 vs
->v9statfs
.f_bsize
= vs
->stbuf
.f_bsize
;
2897 vs
->v9statfs
.f_bsize
*= bsize_factor
;
2899 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2900 * adjust(divide) the number of blocks, free blocks and available
2901 * blocks by bsize factor
2903 vs
->v9statfs
.f_blocks
= vs
->stbuf
.f_blocks
/bsize_factor
;
2904 vs
->v9statfs
.f_bfree
= vs
->stbuf
.f_bfree
/bsize_factor
;
2905 vs
->v9statfs
.f_bavail
= vs
->stbuf
.f_bavail
/bsize_factor
;
2906 vs
->v9statfs
.f_files
= vs
->stbuf
.f_files
;
2907 vs
->v9statfs
.f_ffree
= vs
->stbuf
.f_ffree
;
2908 vs
->v9statfs
.fsid_val
= (unsigned int) vs
->stbuf
.f_fsid
.__val
[0] |
2909 (unsigned long long)vs
->stbuf
.f_fsid
.__val
[1] << 32;
2910 vs
->v9statfs
.f_namelen
= vs
->stbuf
.f_namelen
;
2912 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "ddqqqqqqd",
2913 vs
->v9statfs
.f_type
, vs
->v9statfs
.f_bsize
, vs
->v9statfs
.f_blocks
,
2914 vs
->v9statfs
.f_bfree
, vs
->v9statfs
.f_bavail
, vs
->v9statfs
.f_files
,
2915 vs
->v9statfs
.f_ffree
, vs
->v9statfs
.fsid_val
,
2916 vs
->v9statfs
.f_namelen
);
2919 complete_pdu(s
, vs
->pdu
, vs
->offset
);
2923 static void v9fs_statfs(V9fsState
*s
, V9fsPDU
*pdu
)
2925 V9fsStatfsState
*vs
;
2928 vs
= qemu_malloc(sizeof(*vs
));
2932 memset(&vs
->v9statfs
, 0, sizeof(vs
->v9statfs
));
2934 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &vs
->fid
);
2936 vs
->fidp
= lookup_fid(s
, vs
->fid
);
2937 if (vs
->fidp
== NULL
) {
2942 err
= v9fs_do_statfs(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2943 v9fs_statfs_post_statfs(s
, vs
, err
);
2947 complete_pdu(s
, vs
->pdu
, err
);
2951 static void v9fs_mknod_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
2958 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2959 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
2962 complete_pdu(s
, vs
->pdu
, err
);
2963 v9fs_string_free(&vs
->fullname
);
2964 v9fs_string_free(&vs
->name
);
2968 static void v9fs_mknod_post_mknod(V9fsState
*s
, V9fsMkState
*vs
, int err
)
2975 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2976 v9fs_mknod_post_lstat(s
, vs
, err
);
2979 complete_pdu(s
, vs
->pdu
, err
);
2980 v9fs_string_free(&vs
->fullname
);
2981 v9fs_string_free(&vs
->name
);
2985 static void v9fs_mknod(V9fsState
*s
, V9fsPDU
*pdu
)
2995 vs
= qemu_malloc(sizeof(*vs
));
2999 v9fs_string_init(&vs
->fullname
);
3000 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdddd", &fid
, &vs
->name
, &mode
,
3001 &major
, &minor
, &gid
);
3003 fidp
= lookup_fid(s
, fid
);
3009 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3010 err
= v9fs_do_mknod(s
, vs
->fullname
.data
, mode
, makedev(major
, minor
),
3012 v9fs_mknod_post_mknod(s
, vs
, err
);
3016 complete_pdu(s
, vs
->pdu
, err
);
3017 v9fs_string_free(&vs
->fullname
);
3018 v9fs_string_free(&vs
->name
);
3022 static void v9fs_mkdir_post_lstat(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3029 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
3030 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qid
);
3033 complete_pdu(s
, vs
->pdu
, err
);
3034 v9fs_string_free(&vs
->fullname
);
3035 v9fs_string_free(&vs
->name
);
3039 static void v9fs_mkdir_post_mkdir(V9fsState
*s
, V9fsMkState
*vs
, int err
)
3046 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
3047 v9fs_mkdir_post_lstat(s
, vs
, err
);
3050 complete_pdu(s
, vs
->pdu
, err
);
3051 v9fs_string_free(&vs
->fullname
);
3052 v9fs_string_free(&vs
->name
);
3056 static void v9fs_mkdir(V9fsState
*s
, V9fsPDU
*pdu
)
3065 vs
= qemu_malloc(sizeof(*vs
));
3069 v9fs_string_init(&vs
->fullname
);
3070 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdd", &fid
, &vs
->name
, &mode
,
3073 fidp
= lookup_fid(s
, fid
);
3079 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", fidp
->path
.data
, vs
->name
.data
);
3080 err
= v9fs_do_mkdir(s
, vs
->fullname
.data
, mode
, fidp
->uid
, gid
);
3081 v9fs_mkdir_post_mkdir(s
, vs
, err
);
3085 complete_pdu(s
, vs
->pdu
, err
);
3086 v9fs_string_free(&vs
->fullname
);
3087 v9fs_string_free(&vs
->name
);
3091 typedef void (pdu_handler_t
)(V9fsState
*s
, V9fsPDU
*pdu
);
3093 static pdu_handler_t
*pdu_handlers
[] = {
3094 [P9_TREADDIR
] = v9fs_readdir
,
3095 [P9_TSTATFS
] = v9fs_statfs
,
3096 [P9_TGETATTR
] = v9fs_getattr
,
3097 [P9_TSETATTR
] = v9fs_setattr
,
3098 [P9_TMKNOD
] = v9fs_mknod
,
3099 [P9_TRENAME
] = v9fs_rename
,
3100 [P9_TMKDIR
] = v9fs_mkdir
,
3101 [P9_TVERSION
] = v9fs_version
,
3102 [P9_TLOPEN
] = v9fs_open
,
3103 [P9_TATTACH
] = v9fs_attach
,
3104 [P9_TSTAT
] = v9fs_stat
,
3105 [P9_TWALK
] = v9fs_walk
,
3106 [P9_TCLUNK
] = v9fs_clunk
,
3107 [P9_TOPEN
] = v9fs_open
,
3108 [P9_TREAD
] = v9fs_read
,
3110 [P9_TAUTH
] = v9fs_auth
,
3112 [P9_TFLUSH
] = v9fs_flush
,
3113 [P9_TLINK
] = v9fs_link
,
3114 [P9_TSYMLINK
] = v9fs_symlink
,
3115 [P9_TCREATE
] = v9fs_create
,
3116 [P9_TLCREATE
] = v9fs_lcreate
,
3117 [P9_TWRITE
] = v9fs_write
,
3118 [P9_TWSTAT
] = v9fs_wstat
,
3119 [P9_TREMOVE
] = v9fs_remove
,
3122 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
3124 pdu_handler_t
*handler
;
3130 BUG_ON(pdu
->id
>= ARRAY_SIZE(pdu_handlers
));
3132 handler
= pdu_handlers
[pdu
->id
];
3133 BUG_ON(handler
== NULL
);
3138 static void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
3140 V9fsState
*s
= (V9fsState
*)vdev
;
3144 while ((pdu
= alloc_pdu(s
)) &&
3145 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
3148 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
3149 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
3151 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
3153 memcpy(&pdu
->size
, ptr
, 4);
3155 memcpy(&pdu
->tag
, ptr
+ 5, 2);
3163 static uint32_t virtio_9p_get_features(VirtIODevice
*vdev
, uint32_t features
)
3165 features
|= 1 << VIRTIO_9P_MOUNT_TAG
;
3169 static V9fsState
*to_virtio_9p(VirtIODevice
*vdev
)
3171 return (V9fsState
*)vdev
;
3174 static void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
3176 struct virtio_9p_config
*cfg
;
3177 V9fsState
*s
= to_virtio_9p(vdev
);
3179 cfg
= qemu_mallocz(sizeof(struct virtio_9p_config
) +
3181 stw_raw(&cfg
->tag_len
, s
->tag_len
);
3182 memcpy(cfg
->tag
, s
->tag
, s
->tag_len
);
3183 memcpy(config
, cfg
, s
->config_size
);
3187 VirtIODevice
*virtio_9p_init(DeviceState
*dev
, V9fsConf
*conf
)
3195 s
= (V9fsState
*)virtio_common_init("virtio-9p",
3197 sizeof(struct virtio_9p_config
)+
3201 /* initialize pdu allocator */
3202 QLIST_INIT(&s
->free_list
);
3203 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
3204 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
3207 s
->vq
= virtio_add_queue(&s
->vdev
, MAX_REQ
, handle_9p_output
);
3209 fse
= get_fsdev_fsentry(conf
->fsdev_id
);
3212 /* We don't have a fsdev identified by fsdev_id */
3213 fprintf(stderr
, "Virtio-9p device couldn't find fsdev "
3214 "with the id %s\n", conf
->fsdev_id
);
3218 if (!fse
->path
|| !conf
->tag
) {
3219 /* we haven't specified a mount_tag or the path */
3220 fprintf(stderr
, "fsdev with id %s needs path "
3221 "and Virtio-9p device needs mount_tag arguments\n",
3226 if (!strcmp(fse
->security_model
, "passthrough")) {
3227 /* Files on the Fileserver set to client user credentials */
3228 s
->ctx
.fs_sm
= SM_PASSTHROUGH
;
3229 } else if (!strcmp(fse
->security_model
, "mapped")) {
3230 /* Files on the fileserver are set to QEMU credentials.
3231 * Client user credentials are saved in extended attributes.
3233 s
->ctx
.fs_sm
= SM_MAPPED
;
3235 /* user haven't specified a correct security option */
3236 fprintf(stderr
, "one of the following must be specified as the"
3237 "security option:\n\t security_model=passthrough \n\t "
3238 "security_model=mapped\n");
3242 if (lstat(fse
->path
, &stat
)) {
3243 fprintf(stderr
, "share path %s does not exist\n", fse
->path
);
3245 } else if (!S_ISDIR(stat
.st_mode
)) {
3246 fprintf(stderr
, "share path %s is not a directory \n", fse
->path
);
3250 s
->ctx
.fs_root
= qemu_strdup(fse
->path
);
3251 len
= strlen(conf
->tag
);
3252 if (len
> MAX_TAG_LEN
) {
3255 /* s->tag is non-NULL terminated string */
3256 s
->tag
= qemu_malloc(len
);
3257 memcpy(s
->tag
, conf
->tag
, len
);
3262 s
->vdev
.get_features
= virtio_9p_get_features
;
3263 s
->config_size
= sizeof(struct virtio_9p_config
) +
3265 s
->vdev
.get_config
= virtio_9p_get_config
;