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
, V9fsCreateState
*vs
, mode_t mode
,
168 cred
.fc_uid
= vs
->fidp
->uid
;
171 return s
->ops
->mknod(&s
->ctx
, vs
->fullname
.data
, &cred
);
174 static int v9fs_do_mkdir(V9fsState
*s
, V9fsCreateState
*vs
)
179 cred
.fc_uid
= vs
->fidp
->uid
;
180 cred
.fc_mode
= vs
->perm
& 0777;
182 return s
->ops
->mkdir(&s
->ctx
, vs
->fullname
.data
, &cred
);
185 static int v9fs_do_fstat(V9fsState
*s
, int fd
, struct stat
*stbuf
)
187 return s
->ops
->fstat(&s
->ctx
, fd
, stbuf
);
190 static int v9fs_do_open2(V9fsState
*s
, V9fsCreateState
*vs
)
196 cred
.fc_uid
= vs
->fidp
->uid
;
197 cred
.fc_mode
= vs
->perm
& 0777;
198 flags
= omode_to_uflags(vs
->mode
) | O_CREAT
;
200 return s
->ops
->open2(&s
->ctx
, vs
->fullname
.data
, flags
, &cred
);
203 static int v9fs_do_symlink(V9fsState
*s
, V9fsCreateState
*vs
)
207 cred
.fc_uid
= vs
->fidp
->uid
;
208 cred
.fc_mode
= vs
->perm
| 0777;
210 return s
->ops
->symlink(&s
->ctx
, vs
->extension
.data
, vs
->fullname
.data
,
214 static int v9fs_do_link(V9fsState
*s
, V9fsString
*oldpath
, V9fsString
*newpath
)
216 return s
->ops
->link(&s
->ctx
, oldpath
->data
, newpath
->data
);
219 static int v9fs_do_truncate(V9fsState
*s
, V9fsString
*path
, off_t size
)
221 return s
->ops
->truncate(&s
->ctx
, path
->data
, size
);
224 static int v9fs_do_rename(V9fsState
*s
, V9fsString
*oldpath
,
227 return s
->ops
->rename(&s
->ctx
, oldpath
->data
, newpath
->data
);
230 static int v9fs_do_chown(V9fsState
*s
, V9fsString
*path
, uid_t uid
, gid_t gid
)
237 return s
->ops
->chown(&s
->ctx
, path
->data
, &cred
);
240 static int v9fs_do_utimensat(V9fsState
*s
, V9fsString
*path
,
241 const struct timespec times
[2])
243 return s
->ops
->utimensat(&s
->ctx
, path
->data
, times
);
246 static int v9fs_do_remove(V9fsState
*s
, V9fsString
*path
)
248 return s
->ops
->remove(&s
->ctx
, path
->data
);
251 static int v9fs_do_fsync(V9fsState
*s
, int fd
)
253 return s
->ops
->fsync(&s
->ctx
, fd
);
256 static int v9fs_do_statfs(V9fsState
*s
, V9fsString
*path
, struct statfs
*stbuf
)
258 return s
->ops
->statfs(&s
->ctx
, path
->data
, stbuf
);
261 static void v9fs_string_init(V9fsString
*str
)
267 static void v9fs_string_free(V9fsString
*str
)
269 qemu_free(str
->data
);
274 static void v9fs_string_null(V9fsString
*str
)
276 v9fs_string_free(str
);
279 static int number_to_string(void *arg
, char type
)
281 unsigned int ret
= 0;
285 unsigned int num
= *(unsigned int *)arg
;
294 printf("Number_to_string: Unknown number format\n");
301 static int v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
304 char *iter
= (char *)fmt
;
308 unsigned int arg_uint
;
310 /* Find the number of %'s that denotes an argument */
311 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
316 len
= strlen(fmt
) - 2*nr_args
;
326 /* Now parse the format string */
327 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
331 arg_uint
= va_arg(ap2
, unsigned int);
332 len
+= number_to_string((void *)&arg_uint
, 'u');
335 arg_char_ptr
= va_arg(ap2
, char *);
336 len
+= strlen(arg_char_ptr
);
343 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
350 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
352 return vsprintf(*strp
, fmt
, ap
);
355 static void v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
360 v9fs_string_free(str
);
363 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
370 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
372 v9fs_string_free(lhs
);
373 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
376 static size_t v9fs_string_size(V9fsString
*str
)
381 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
385 for (f
= s
->fid_list
; f
; f
= f
->next
) {
394 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
398 f
= lookup_fid(s
, fid
);
403 f
= qemu_mallocz(sizeof(V9fsFidState
));
409 f
->next
= s
->fid_list
;
415 static int free_fid(V9fsState
*s
, int32_t fid
)
417 V9fsFidState
**fidpp
, *fidp
;
419 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
420 if ((*fidpp
)->fid
== fid
) {
425 if (*fidpp
== NULL
) {
432 if (fidp
->fd
!= -1) {
433 v9fs_do_close(s
, fidp
->fd
);
436 v9fs_do_closedir(s
, fidp
->dir
);
438 v9fs_string_free(&fidp
->path
);
444 #define P9_QID_TYPE_DIR 0x80
445 #define P9_QID_TYPE_SYMLINK 0x02
447 #define P9_STAT_MODE_DIR 0x80000000
448 #define P9_STAT_MODE_APPEND 0x40000000
449 #define P9_STAT_MODE_EXCL 0x20000000
450 #define P9_STAT_MODE_MOUNT 0x10000000
451 #define P9_STAT_MODE_AUTH 0x08000000
452 #define P9_STAT_MODE_TMP 0x04000000
453 #define P9_STAT_MODE_SYMLINK 0x02000000
454 #define P9_STAT_MODE_LINK 0x01000000
455 #define P9_STAT_MODE_DEVICE 0x00800000
456 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
457 #define P9_STAT_MODE_SOCKET 0x00100000
458 #define P9_STAT_MODE_SETUID 0x00080000
459 #define P9_STAT_MODE_SETGID 0x00040000
460 #define P9_STAT_MODE_SETVTX 0x00010000
462 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
463 P9_STAT_MODE_SYMLINK | \
464 P9_STAT_MODE_LINK | \
465 P9_STAT_MODE_DEVICE | \
466 P9_STAT_MODE_NAMED_PIPE | \
469 /* This is the algorithm from ufs in spfs */
470 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
474 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
475 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
476 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
478 if (S_ISDIR(stbuf
->st_mode
)) {
479 qidp
->type
|= P9_QID_TYPE_DIR
;
481 if (S_ISLNK(stbuf
->st_mode
)) {
482 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
486 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
491 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
496 stat_to_qid(&stbuf
, qidp
);
500 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
504 if (!QLIST_EMPTY(&s
->free_list
)) {
505 pdu
= QLIST_FIRST(&s
->free_list
);
506 QLIST_REMOVE(pdu
, next
);
511 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
514 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
518 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
519 size_t offset
, size_t size
, int pack
)
524 for (i
= 0; size
&& i
< sg_count
; i
++) {
526 if (offset
>= sg
[i
].iov_len
) {
528 offset
-= sg
[i
].iov_len
;
531 len
= MIN(sg
[i
].iov_len
- offset
, size
);
533 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
535 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
550 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
552 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
556 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
559 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
563 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
567 struct iovec
*src_sg
;
571 src_sg
= pdu
->elem
.in_sg
;
572 num
= pdu
->elem
.in_num
;
574 src_sg
= pdu
->elem
.out_sg
;
575 num
= pdu
->elem
.out_num
;
579 for (i
= 0; i
< num
; i
++) {
581 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
582 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
584 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
585 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
586 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
587 sg
[j
].iov_base
+= (offset
- pos
);
588 sg
[j
].iov_len
-= (offset
- pos
);
591 pos
+= src_sg
[i
].iov_len
;
597 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
599 size_t old_offset
= offset
;
604 for (i
= 0; fmt
[i
]; i
++) {
607 uint8_t *valp
= va_arg(ap
, uint8_t *);
608 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
613 valp
= va_arg(ap
, uint16_t *);
614 val
= le16_to_cpupu(valp
);
615 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
621 valp
= va_arg(ap
, uint32_t *);
622 val
= le32_to_cpupu(valp
);
623 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
629 valp
= va_arg(ap
, uint64_t *);
630 val
= le64_to_cpup(valp
);
631 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
636 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
637 int *iovcnt
= va_arg(ap
, int *);
638 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
642 V9fsString
*str
= va_arg(ap
, V9fsString
*);
643 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
644 /* FIXME: sanity check str->size */
645 str
->data
= qemu_malloc(str
->size
+ 1);
646 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
647 str
->data
[str
->size
] = 0;
651 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
652 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
653 &qidp
->type
, &qidp
->version
, &qidp
->path
);
657 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
658 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
659 &statp
->size
, &statp
->type
, &statp
->dev
,
660 &statp
->qid
, &statp
->mode
, &statp
->atime
,
661 &statp
->mtime
, &statp
->length
,
662 &statp
->name
, &statp
->uid
, &statp
->gid
,
663 &statp
->muid
, &statp
->extension
,
664 &statp
->n_uid
, &statp
->n_gid
,
669 V9fsIattr
*iattr
= va_arg(ap
, V9fsIattr
*);
670 offset
+= pdu_unmarshal(pdu
, offset
, "ddddqqqqq",
671 &iattr
->valid
, &iattr
->mode
,
672 &iattr
->uid
, &iattr
->gid
, &iattr
->size
,
673 &iattr
->atime_sec
, &iattr
->atime_nsec
,
674 &iattr
->mtime_sec
, &iattr
->mtime_nsec
);
684 return offset
- old_offset
;
687 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
689 size_t old_offset
= offset
;
694 for (i
= 0; fmt
[i
]; i
++) {
697 uint8_t val
= va_arg(ap
, int);
698 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
703 cpu_to_le16w(&val
, va_arg(ap
, int));
704 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
709 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
710 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
715 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
716 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
720 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
721 int *iovcnt
= va_arg(ap
, int *);
722 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
726 V9fsString
*str
= va_arg(ap
, V9fsString
*);
727 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
728 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
732 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
733 offset
+= pdu_marshal(pdu
, offset
, "bdq",
734 qidp
->type
, qidp
->version
, qidp
->path
);
738 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
739 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
740 statp
->size
, statp
->type
, statp
->dev
,
741 &statp
->qid
, statp
->mode
, statp
->atime
,
742 statp
->mtime
, statp
->length
, &statp
->name
,
743 &statp
->uid
, &statp
->gid
, &statp
->muid
,
744 &statp
->extension
, statp
->n_uid
,
745 statp
->n_gid
, statp
->n_muid
);
749 V9fsStatDotl
*statp
= va_arg(ap
, V9fsStatDotl
*);
750 offset
+= pdu_marshal(pdu
, offset
, "qQdddqqqqqqqqqqqqqqq",
751 statp
->st_result_mask
,
752 &statp
->qid
, statp
->st_mode
,
753 statp
->st_uid
, statp
->st_gid
,
754 statp
->st_nlink
, statp
->st_rdev
,
755 statp
->st_size
, statp
->st_blksize
, statp
->st_blocks
,
756 statp
->st_atime_sec
, statp
->st_atime_nsec
,
757 statp
->st_mtime_sec
, statp
->st_mtime_nsec
,
758 statp
->st_ctime_sec
, statp
->st_ctime_nsec
,
759 statp
->st_btime_sec
, statp
->st_btime_nsec
,
760 statp
->st_gen
, statp
->st_data_version
);
769 return offset
- old_offset
;
772 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
774 int8_t id
= pdu
->id
+ 1; /* Response */
780 str
.data
= strerror(err
);
781 str
.size
= strlen(str
.data
);
784 len
+= pdu_marshal(pdu
, len
, "s", &str
);
786 len
+= pdu_marshal(pdu
, len
, "d", err
);
792 /* fill out the header */
793 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
795 /* keep these in sync */
799 /* push onto queue and notify */
800 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
802 /* FIXME: we should batch these completions */
803 virtio_notify(&s
->vdev
, s
->vq
);
808 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
813 if (mode
& P9_STAT_MODE_DIR
) {
818 if (mode
& P9_STAT_MODE_SYMLINK
) {
821 if (mode
& P9_STAT_MODE_SOCKET
) {
824 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
827 if (mode
& P9_STAT_MODE_DEVICE
) {
828 if (extension
&& extension
->data
[0] == 'c') {
840 if (mode
& P9_STAT_MODE_SETUID
) {
843 if (mode
& P9_STAT_MODE_SETGID
) {
846 if (mode
& P9_STAT_MODE_SETVTX
) {
853 static int donttouch_stat(V9fsStat
*stat
)
855 if (stat
->type
== -1 &&
857 stat
->qid
.type
== -1 &&
858 stat
->qid
.version
== -1 &&
859 stat
->qid
.path
== -1 &&
863 stat
->length
== -1 &&
870 stat
->n_muid
== -1) {
877 static void v9fs_stat_free(V9fsStat
*stat
)
879 v9fs_string_free(&stat
->name
);
880 v9fs_string_free(&stat
->uid
);
881 v9fs_string_free(&stat
->gid
);
882 v9fs_string_free(&stat
->muid
);
883 v9fs_string_free(&stat
->extension
);
886 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
890 mode
= stbuf
->st_mode
& 0777;
891 if (S_ISDIR(stbuf
->st_mode
)) {
892 mode
|= P9_STAT_MODE_DIR
;
896 if (S_ISLNK(stbuf
->st_mode
)) {
897 mode
|= P9_STAT_MODE_SYMLINK
;
900 if (S_ISSOCK(stbuf
->st_mode
)) {
901 mode
|= P9_STAT_MODE_SOCKET
;
904 if (S_ISFIFO(stbuf
->st_mode
)) {
905 mode
|= P9_STAT_MODE_NAMED_PIPE
;
908 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
909 mode
|= P9_STAT_MODE_DEVICE
;
912 if (stbuf
->st_mode
& S_ISUID
) {
913 mode
|= P9_STAT_MODE_SETUID
;
916 if (stbuf
->st_mode
& S_ISGID
) {
917 mode
|= P9_STAT_MODE_SETGID
;
920 if (stbuf
->st_mode
& S_ISVTX
) {
921 mode
|= P9_STAT_MODE_SETVTX
;
928 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
929 const struct stat
*stbuf
,
935 memset(v9stat
, 0, sizeof(*v9stat
));
937 stat_to_qid(stbuf
, &v9stat
->qid
);
938 v9stat
->mode
= stat_to_v9mode(stbuf
);
939 v9stat
->atime
= stbuf
->st_atime
;
940 v9stat
->mtime
= stbuf
->st_mtime
;
941 v9stat
->length
= stbuf
->st_size
;
943 v9fs_string_null(&v9stat
->uid
);
944 v9fs_string_null(&v9stat
->gid
);
945 v9fs_string_null(&v9stat
->muid
);
948 v9stat
->n_uid
= stbuf
->st_uid
;
949 v9stat
->n_gid
= stbuf
->st_gid
;
952 v9fs_string_null(&v9stat
->extension
);
954 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
955 err
= v9fs_do_readlink(s
, name
, &v9stat
->extension
);
960 v9stat
->extension
.data
[err
] = 0;
961 v9stat
->extension
.size
= err
;
962 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
963 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
964 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
965 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
966 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
967 v9fs_string_sprintf(&v9stat
->extension
, "%s %u",
968 "HARDLINKCOUNT", stbuf
->st_nlink
);
972 str
= strrchr(name
->data
, '/');
979 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
982 v9fs_string_size(&v9stat
->name
) +
983 v9fs_string_size(&v9stat
->uid
) +
984 v9fs_string_size(&v9stat
->gid
) +
985 v9fs_string_size(&v9stat
->muid
) +
986 v9fs_string_size(&v9stat
->extension
);
990 #define P9_STATS_MODE 0x00000001ULL
991 #define P9_STATS_NLINK 0x00000002ULL
992 #define P9_STATS_UID 0x00000004ULL
993 #define P9_STATS_GID 0x00000008ULL
994 #define P9_STATS_RDEV 0x00000010ULL
995 #define P9_STATS_ATIME 0x00000020ULL
996 #define P9_STATS_MTIME 0x00000040ULL
997 #define P9_STATS_CTIME 0x00000080ULL
998 #define P9_STATS_INO 0x00000100ULL
999 #define P9_STATS_SIZE 0x00000200ULL
1000 #define P9_STATS_BLOCKS 0x00000400ULL
1002 #define P9_STATS_BTIME 0x00000800ULL
1003 #define P9_STATS_GEN 0x00001000ULL
1004 #define P9_STATS_DATA_VERSION 0x00002000ULL
1006 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1007 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1010 static void stat_to_v9stat_dotl(V9fsState
*s
, const struct stat
*stbuf
,
1011 V9fsStatDotl
*v9lstat
)
1013 memset(v9lstat
, 0, sizeof(*v9lstat
));
1015 v9lstat
->st_mode
= stbuf
->st_mode
;
1016 v9lstat
->st_nlink
= stbuf
->st_nlink
;
1017 v9lstat
->st_uid
= stbuf
->st_uid
;
1018 v9lstat
->st_gid
= stbuf
->st_gid
;
1019 v9lstat
->st_rdev
= stbuf
->st_rdev
;
1020 v9lstat
->st_size
= stbuf
->st_size
;
1021 v9lstat
->st_blksize
= stbuf
->st_blksize
;
1022 v9lstat
->st_blocks
= stbuf
->st_blocks
;
1023 v9lstat
->st_atime_sec
= stbuf
->st_atime
;
1024 v9lstat
->st_atime_nsec
= stbuf
->st_atim
.tv_nsec
;
1025 v9lstat
->st_mtime_sec
= stbuf
->st_mtime
;
1026 v9lstat
->st_mtime_nsec
= stbuf
->st_mtim
.tv_nsec
;
1027 v9lstat
->st_ctime_sec
= stbuf
->st_ctime
;
1028 v9lstat
->st_ctime_nsec
= stbuf
->st_ctim
.tv_nsec
;
1029 /* Currently we only support BASIC fields in stat */
1030 v9lstat
->st_result_mask
= P9_STATS_BASIC
;
1032 stat_to_qid(stbuf
, &v9lstat
->qid
);
1035 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
1037 while (len
&& *iovcnt
) {
1038 if (len
< sg
->iov_len
) {
1040 sg
->iov_base
+= len
;
1052 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
1057 for (i
= 0; i
< *cnt
; i
++) {
1058 if ((total
+ sg
[i
].iov_len
) > cap
) {
1059 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
1063 total
+= sg
[i
].iov_len
;
1071 static void print_sg(struct iovec
*sg
, int cnt
)
1075 printf("sg[%d]: {", cnt
);
1076 for (i
= 0; i
< cnt
; i
++) {
1080 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1085 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1088 v9fs_string_init(&str
);
1089 v9fs_string_copy(&str
, dst
);
1090 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1091 v9fs_string_free(&str
);
1094 static void v9fs_version(V9fsState
*s
, V9fsPDU
*pdu
)
1099 pdu_unmarshal(pdu
, offset
, "ds", &s
->msize
, &version
);
1101 if (!strcmp(version
.data
, "9P2000.u")) {
1102 s
->proto_version
= V9FS_PROTO_2000U
;
1103 } else if (!strcmp(version
.data
, "9P2000.L")) {
1104 s
->proto_version
= V9FS_PROTO_2000L
;
1106 v9fs_string_sprintf(&version
, "unknown");
1109 offset
+= pdu_marshal(pdu
, offset
, "ds", s
->msize
, &version
);
1110 complete_pdu(s
, pdu
, offset
);
1112 v9fs_string_free(&version
);
1115 static void v9fs_attach(V9fsState
*s
, V9fsPDU
*pdu
)
1117 int32_t fid
, afid
, n_uname
;
1118 V9fsString uname
, aname
;
1124 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1126 fidp
= alloc_fid(s
, fid
);
1132 fidp
->uid
= n_uname
;
1134 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1135 err
= fid_to_qid(s
, fidp
, &qid
);
1142 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1146 complete_pdu(s
, pdu
, err
);
1147 v9fs_string_free(&uname
);
1148 v9fs_string_free(&aname
);
1151 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1158 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1162 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1166 complete_pdu(s
, vs
->pdu
, err
);
1167 v9fs_stat_free(&vs
->v9stat
);
1171 static void v9fs_stat(V9fsState
*s
, V9fsPDU
*pdu
)
1177 vs
= qemu_malloc(sizeof(*vs
));
1181 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1183 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1185 vs
->fidp
= lookup_fid(s
, fid
);
1186 if (vs
->fidp
== NULL
) {
1191 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1192 v9fs_stat_post_lstat(s
, vs
, err
);
1196 complete_pdu(s
, vs
->pdu
, err
);
1197 v9fs_stat_free(&vs
->v9stat
);
1201 static void v9fs_getattr_post_lstat(V9fsState
*s
, V9fsStatStateDotl
*vs
,
1209 stat_to_v9stat_dotl(s
, &vs
->stbuf
, &vs
->v9stat_dotl
);
1210 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "A", &vs
->v9stat_dotl
);
1214 complete_pdu(s
, vs
->pdu
, err
);
1218 static void v9fs_getattr(V9fsState
*s
, V9fsPDU
*pdu
)
1221 V9fsStatStateDotl
*vs
;
1224 uint64_t request_mask
;
1226 vs
= qemu_malloc(sizeof(*vs
));
1230 memset(&vs
->v9stat_dotl
, 0, sizeof(vs
->v9stat_dotl
));
1232 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dq", &fid
, &request_mask
);
1234 fidp
= lookup_fid(s
, fid
);
1240 /* Currently we only support BASIC fields in stat, so there is no
1241 * need to look at request_mask.
1243 err
= v9fs_do_lstat(s
, &fidp
->path
, &vs
->stbuf
);
1244 v9fs_getattr_post_lstat(s
, vs
, err
);
1248 complete_pdu(s
, vs
->pdu
, err
);
1252 /* From Linux kernel code */
1253 #define ATTR_MODE (1 << 0)
1254 #define ATTR_UID (1 << 1)
1255 #define ATTR_GID (1 << 2)
1256 #define ATTR_SIZE (1 << 3)
1257 #define ATTR_ATIME (1 << 4)
1258 #define ATTR_MTIME (1 << 5)
1259 #define ATTR_CTIME (1 << 6)
1260 #define ATTR_MASK 127
1261 #define ATTR_ATIME_SET (1 << 7)
1262 #define ATTR_MTIME_SET (1 << 8)
1264 static void v9fs_setattr_post_truncate(V9fsState
*s
, V9fsSetattrState
*vs
,
1274 complete_pdu(s
, vs
->pdu
, err
);
1278 static void v9fs_setattr_post_chown(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1285 if (vs
->v9iattr
.valid
& (ATTR_SIZE
)) {
1286 err
= v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9iattr
.size
);
1288 v9fs_setattr_post_truncate(s
, vs
, err
);
1292 complete_pdu(s
, vs
->pdu
, err
);
1296 static void v9fs_setattr_post_utimensat(V9fsState
*s
, V9fsSetattrState
*vs
,
1304 /* If the only valid entry in iattr is ctime we can call
1305 * chown(-1,-1) to update the ctime of the file
1307 if ((vs
->v9iattr
.valid
& (ATTR_UID
| ATTR_GID
)) ||
1308 ((vs
->v9iattr
.valid
& ATTR_CTIME
)
1309 && !((vs
->v9iattr
.valid
& ATTR_MASK
) & ~ATTR_CTIME
))) {
1310 if (!(vs
->v9iattr
.valid
& ATTR_UID
)) {
1311 vs
->v9iattr
.uid
= -1;
1313 if (!(vs
->v9iattr
.valid
& ATTR_GID
)) {
1314 vs
->v9iattr
.gid
= -1;
1316 err
= v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9iattr
.uid
,
1319 v9fs_setattr_post_chown(s
, vs
, err
);
1323 complete_pdu(s
, vs
->pdu
, err
);
1327 static void v9fs_setattr_post_chmod(V9fsState
*s
, V9fsSetattrState
*vs
, int err
)
1334 if (vs
->v9iattr
.valid
& (ATTR_ATIME
| ATTR_MTIME
)) {
1335 struct timespec times
[2];
1336 if (vs
->v9iattr
.valid
& ATTR_ATIME
) {
1337 if (vs
->v9iattr
.valid
& ATTR_ATIME_SET
) {
1338 times
[0].tv_sec
= vs
->v9iattr
.atime_sec
;
1339 times
[0].tv_nsec
= vs
->v9iattr
.atime_nsec
;
1341 times
[0].tv_nsec
= UTIME_NOW
;
1344 times
[0].tv_nsec
= UTIME_OMIT
;
1347 if (vs
->v9iattr
.valid
& ATTR_MTIME
) {
1348 if (vs
->v9iattr
.valid
& ATTR_MTIME_SET
) {
1349 times
[1].tv_sec
= vs
->v9iattr
.mtime_sec
;
1350 times
[1].tv_nsec
= vs
->v9iattr
.mtime_nsec
;
1352 times
[1].tv_nsec
= UTIME_NOW
;
1355 times
[1].tv_nsec
= UTIME_OMIT
;
1357 err
= v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
);
1359 v9fs_setattr_post_utimensat(s
, vs
, err
);
1363 complete_pdu(s
, vs
->pdu
, err
);
1367 static void v9fs_setattr(V9fsState
*s
, V9fsPDU
*pdu
)
1370 V9fsSetattrState
*vs
;
1373 vs
= qemu_malloc(sizeof(*vs
));
1377 pdu_unmarshal(pdu
, vs
->offset
, "dI", &fid
, &vs
->v9iattr
);
1379 vs
->fidp
= lookup_fid(s
, fid
);
1380 if (vs
->fidp
== NULL
) {
1385 if (vs
->v9iattr
.valid
& ATTR_MODE
) {
1386 err
= v9fs_do_chmod(s
, &vs
->fidp
->path
, vs
->v9iattr
.mode
);
1389 v9fs_setattr_post_chmod(s
, vs
, err
);
1393 complete_pdu(s
, vs
->pdu
, err
);
1397 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1399 complete_pdu(s
, vs
->pdu
, err
);
1402 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1403 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1406 qemu_free(vs
->wnames
);
1407 qemu_free(vs
->qids
);
1411 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1415 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1417 for (i
= 0; i
< vs
->nwnames
; i
++) {
1418 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1422 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1426 free_fid(s
, vs
->newfidp
->fid
);
1427 v9fs_string_free(&vs
->path
);
1432 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1435 if (vs
->name_idx
< vs
->nwnames
) {
1436 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1437 vs
->wnames
[vs
->name_idx
].data
);
1438 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1440 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1441 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1445 v9fs_string_free(&vs
->path
);
1446 v9fs_walk_marshal(vs
);
1449 v9fs_walk_complete(s
, vs
, err
);
1452 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1456 v9fs_string_free(&vs
->path
);
1461 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1463 if (vs
->name_idx
< vs
->nwnames
) {
1465 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1466 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1467 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1469 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1470 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1474 v9fs_string_free(&vs
->path
);
1475 v9fs_walk_marshal(vs
);
1478 v9fs_walk_complete(s
, vs
, err
);
1481 static void v9fs_walk(V9fsState
*s
, V9fsPDU
*pdu
)
1483 int32_t fid
, newfid
;
1488 vs
= qemu_malloc(sizeof(*vs
));
1494 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1495 &newfid
, &vs
->nwnames
);
1498 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1500 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1502 for (i
= 0; i
< vs
->nwnames
; i
++) {
1503 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1508 vs
->fidp
= lookup_fid(s
, fid
);
1509 if (vs
->fidp
== NULL
) {
1514 /* FIXME: is this really valid? */
1515 if (fid
== newfid
) {
1517 BUG_ON(vs
->fidp
->fd
!= -1);
1518 BUG_ON(vs
->fidp
->dir
);
1519 v9fs_string_init(&vs
->path
);
1522 if (vs
->name_idx
< vs
->nwnames
) {
1523 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1524 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1525 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1527 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1528 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1532 vs
->newfidp
= alloc_fid(s
, newfid
);
1533 if (vs
->newfidp
== NULL
) {
1538 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1539 v9fs_string_init(&vs
->path
);
1541 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1543 if (vs
->name_idx
< vs
->nwnames
) {
1544 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1545 vs
->wnames
[vs
->name_idx
].data
);
1546 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1548 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1549 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1554 v9fs_walk_marshal(vs
);
1557 v9fs_walk_complete(s
, vs
, err
);
1560 static int32_t get_iounit(V9fsState
*s
, V9fsString
*name
)
1562 struct statfs stbuf
;
1566 * iounit should be multiples of f_bsize (host filesystem block size
1567 * and as well as less than (client msize - P9_IOHDRSZ))
1569 if (!v9fs_do_statfs(s
, name
, &stbuf
)) {
1570 iounit
= stbuf
.f_bsize
;
1571 iounit
*= (s
->msize
- P9_IOHDRSZ
)/stbuf
.f_bsize
;
1575 iounit
= s
->msize
- P9_IOHDRSZ
;
1580 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1582 if (vs
->fidp
->dir
== NULL
) {
1587 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1590 complete_pdu(s
, vs
->pdu
, err
);
1595 static void v9fs_open_post_getiounit(V9fsState
*s
, V9fsOpenState
*vs
)
1598 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
1600 complete_pdu(s
, vs
->pdu
, err
);
1604 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1606 if (vs
->fidp
->fd
== -1) {
1611 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
1612 v9fs_open_post_getiounit(s
, vs
);
1615 complete_pdu(s
, vs
->pdu
, err
);
1619 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1626 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1628 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1629 vs
->fidp
->dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1630 v9fs_open_post_opendir(s
, vs
, err
);
1632 vs
->fidp
->fd
= v9fs_do_open(s
, &vs
->fidp
->path
,
1633 omode_to_uflags(vs
->mode
));
1634 v9fs_open_post_open(s
, vs
, err
);
1638 complete_pdu(s
, vs
->pdu
, err
);
1642 static void v9fs_open(V9fsState
*s
, V9fsPDU
*pdu
)
1649 vs
= qemu_malloc(sizeof(*vs
));
1653 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1655 vs
->fidp
= lookup_fid(s
, fid
);
1656 if (vs
->fidp
== NULL
) {
1661 BUG_ON(vs
->fidp
->fd
!= -1);
1662 BUG_ON(vs
->fidp
->dir
);
1664 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1666 v9fs_open_post_lstat(s
, vs
, err
);
1669 complete_pdu(s
, pdu
, err
);
1673 static void v9fs_clunk(V9fsState
*s
, V9fsPDU
*pdu
)
1679 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1681 err
= free_fid(s
, fid
);
1689 complete_pdu(s
, pdu
, err
);
1692 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1694 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1699 v9fs_stat_free(&vs
->v9stat
);
1700 v9fs_string_free(&vs
->name
);
1701 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1702 vs
->offset
+= vs
->count
;
1705 complete_pdu(s
, vs
->pdu
, err
);
1710 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1717 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1722 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1724 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1725 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1726 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->dir_pos
);
1727 v9fs_read_post_seekdir(s
, vs
, err
);
1730 vs
->count
+= vs
->len
;
1731 v9fs_stat_free(&vs
->v9stat
);
1732 v9fs_string_free(&vs
->name
);
1733 vs
->dir_pos
= vs
->dent
->d_off
;
1734 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1735 v9fs_read_post_readdir(s
, vs
, err
);
1738 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->dir_pos
);
1739 v9fs_read_post_seekdir(s
, vs
, err
);
1744 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1747 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1748 v9fs_string_init(&vs
->name
);
1749 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1751 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1752 v9fs_read_post_dir_lstat(s
, vs
, err
);
1756 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1757 vs
->offset
+= vs
->count
;
1759 complete_pdu(s
, vs
->pdu
, err
);
1764 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1766 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1767 v9fs_read_post_readdir(s
, vs
, err
);
1771 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1774 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->dir
);
1775 v9fs_read_post_telldir(s
, vs
, err
);
1779 static void v9fs_read_post_readv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1782 /* IO error return the error */
1786 vs
->total
+= vs
->len
;
1787 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1788 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1791 print_sg(vs
->sg
, vs
->cnt
);
1793 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1794 } while (vs
->len
== -1 && errno
== EINTR
);
1795 if (vs
->len
== -1) {
1798 v9fs_read_post_readv(s
, vs
, err
);
1801 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1802 vs
->offset
+= vs
->count
;
1806 complete_pdu(s
, vs
->pdu
, err
);
1810 static void v9fs_read_post_lseek(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1816 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1818 if (vs
->total
< vs
->count
) {
1821 print_sg(vs
->sg
, vs
->cnt
);
1823 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1824 } while (vs
->len
== -1 && errno
== EINTR
);
1825 if (vs
->len
== -1) {
1828 v9fs_read_post_readv(s
, vs
, err
);
1832 complete_pdu(s
, vs
->pdu
, err
);
1836 static void v9fs_read(V9fsState
*s
, V9fsPDU
*pdu
)
1842 vs
= qemu_malloc(sizeof(*vs
));
1849 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1851 vs
->fidp
= lookup_fid(s
, fid
);
1852 if (vs
->fidp
== NULL
) {
1857 if (vs
->fidp
->dir
) {
1858 vs
->max_count
= vs
->count
;
1861 v9fs_do_rewinddir(s
, vs
->fidp
->dir
);
1863 v9fs_read_post_rewinddir(s
, vs
, err
);
1865 } else if (vs
->fidp
->fd
!= -1) {
1867 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
1868 err
= v9fs_do_lseek(s
, vs
->fidp
->fd
, vs
->off
, SEEK_SET
);
1869 v9fs_read_post_lseek(s
, vs
, err
);
1875 complete_pdu(s
, pdu
, err
);
1879 typedef struct V9fsReadDirState
{
1883 off_t saved_dir_pos
;
1884 struct dirent
*dent
;
1888 int64_t initial_offset
;
1892 static void v9fs_readdir_post_seekdir(V9fsState
*s
, V9fsReadDirState
*vs
)
1894 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1895 vs
->offset
+= vs
->count
;
1896 complete_pdu(s
, vs
->pdu
, vs
->offset
);
1901 /* Size of each dirent on the wire: size of qid (13) + size of offset (8)
1902 * size of type (1) + size of name.size (2) + strlen(name.data)
1904 #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
1906 static void v9fs_readdir_post_readdir(V9fsState
*s
, V9fsReadDirState
*vs
)
1912 v9fs_string_init(&vs
->name
);
1913 v9fs_string_sprintf(&vs
->name
, "%s", vs
->dent
->d_name
);
1915 if ((vs
->count
+ V9_READDIR_DATA_SZ
) > vs
->max_count
) {
1916 /* Ran out of buffer. Set dir back to old position and return */
1917 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->saved_dir_pos
);
1918 v9fs_readdir_post_seekdir(s
, vs
);
1922 /* Fill up just the path field of qid because the client uses
1923 * only that. To fill the entire qid structure we will have
1924 * to stat each dirent found, which is expensive
1926 size
= MIN(sizeof(vs
->dent
->d_ino
), sizeof(vs
->qid
.path
));
1927 memcpy(&vs
->qid
.path
, &vs
->dent
->d_ino
, size
);
1928 /* Fill the other fields with dummy values */
1930 vs
->qid
.version
= 0;
1932 len
= pdu_marshal(vs
->pdu
, vs
->offset
+4+vs
->count
, "Qqbs",
1933 &vs
->qid
, vs
->dent
->d_off
,
1934 vs
->dent
->d_type
, &vs
->name
);
1936 v9fs_string_free(&vs
->name
);
1937 vs
->saved_dir_pos
= vs
->dent
->d_off
;
1938 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1939 v9fs_readdir_post_readdir(s
, vs
);
1943 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1944 vs
->offset
+= vs
->count
;
1945 complete_pdu(s
, vs
->pdu
, vs
->offset
);
1950 static void v9fs_readdir_post_telldir(V9fsState
*s
, V9fsReadDirState
*vs
)
1952 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1953 v9fs_readdir_post_readdir(s
, vs
);
1957 static void v9fs_readdir_post_setdir(V9fsState
*s
, V9fsReadDirState
*vs
)
1959 vs
->saved_dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->dir
);
1960 v9fs_readdir_post_telldir(s
, vs
);
1964 static void v9fs_readdir(V9fsState
*s
, V9fsPDU
*pdu
)
1967 V9fsReadDirState
*vs
;
1971 vs
= qemu_malloc(sizeof(*vs
));
1976 pdu_unmarshal(vs
->pdu
, offset
, "dqd", &fid
, &vs
->initial_offset
,
1979 vs
->fidp
= lookup_fid(s
, fid
);
1980 if (vs
->fidp
== NULL
|| !(vs
->fidp
->dir
)) {
1985 if (vs
->initial_offset
== 0) {
1986 v9fs_do_rewinddir(s
, vs
->fidp
->dir
);
1988 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->initial_offset
);
1991 v9fs_readdir_post_setdir(s
, vs
);
1995 complete_pdu(s
, pdu
, err
);
2000 static void v9fs_write_post_writev(V9fsState
*s
, V9fsWriteState
*vs
,
2004 /* IO error return the error */
2008 vs
->total
+= vs
->len
;
2009 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
2010 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
2013 print_sg(vs
->sg
, vs
->cnt
);
2015 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
2016 } while (vs
->len
== -1 && errno
== EINTR
);
2017 if (vs
->len
== -1) {
2020 v9fs_write_post_writev(s
, vs
, err
);
2023 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
2027 complete_pdu(s
, vs
->pdu
, err
);
2031 static void v9fs_write_post_lseek(V9fsState
*s
, V9fsWriteState
*vs
, ssize_t err
)
2037 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
2039 if (vs
->total
< vs
->count
) {
2042 print_sg(vs
->sg
, vs
->cnt
);
2044 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
2045 } while (vs
->len
== -1 && errno
== EINTR
);
2046 if (vs
->len
== -1) {
2049 v9fs_write_post_writev(s
, vs
, err
);
2054 complete_pdu(s
, vs
->pdu
, err
);
2058 static void v9fs_write(V9fsState
*s
, V9fsPDU
*pdu
)
2064 vs
= qemu_malloc(sizeof(*vs
));
2072 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
2075 vs
->fidp
= lookup_fid(s
, fid
);
2076 if (vs
->fidp
== NULL
) {
2081 if (vs
->fidp
->fd
== -1) {
2086 err
= v9fs_do_lseek(s
, vs
->fidp
->fd
, vs
->off
, SEEK_SET
);
2088 v9fs_write_post_lseek(s
, vs
, err
);
2092 complete_pdu(s
, vs
->pdu
, err
);
2096 static void v9fs_create_post_getiounit(V9fsState
*s
, V9fsCreateState
*vs
)
2099 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
2100 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
2102 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, vs
->iounit
);
2105 complete_pdu(s
, vs
->pdu
, err
);
2106 v9fs_string_free(&vs
->name
);
2107 v9fs_string_free(&vs
->extension
);
2108 v9fs_string_free(&vs
->fullname
);
2112 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2115 vs
->iounit
= get_iounit(s
, &vs
->fidp
->path
);
2116 v9fs_create_post_getiounit(s
, vs
);
2120 complete_pdu(s
, vs
->pdu
, err
);
2121 v9fs_string_free(&vs
->name
);
2122 v9fs_string_free(&vs
->extension
);
2123 v9fs_string_free(&vs
->fullname
);
2127 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2132 v9fs_post_create(s
, vs
, err
);
2135 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
2138 if (!vs
->fidp
->dir
) {
2141 v9fs_post_create(s
, vs
, err
);
2144 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
2152 vs
->fidp
->dir
= v9fs_do_opendir(s
, &vs
->fullname
);
2153 v9fs_create_post_opendir(s
, vs
, err
);
2157 v9fs_post_create(s
, vs
, err
);
2160 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2167 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2168 v9fs_create_post_dir_lstat(s
, vs
, err
);
2172 v9fs_post_create(s
, vs
, err
);
2175 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2182 v9fs_post_create(s
, vs
, err
);
2186 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2188 if (vs
->fidp
->fd
== -1) {
2193 err
= v9fs_do_fstat(s
, vs
->fidp
->fd
, &vs
->stbuf
);
2194 v9fs_create_post_fstat(s
, vs
, err
);
2199 v9fs_post_create(s
, vs
, err
);
2203 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
2206 if (err
== 0 || errno
!= ENOENT
) {
2211 if (vs
->perm
& P9_STAT_MODE_DIR
) {
2212 err
= v9fs_do_mkdir(s
, vs
);
2213 v9fs_create_post_mkdir(s
, vs
, err
);
2214 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
2215 err
= v9fs_do_symlink(s
, vs
);
2216 v9fs_create_post_perms(s
, vs
, err
);
2217 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
2218 int32_t nfid
= atoi(vs
->extension
.data
);
2219 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
2220 if (nfidp
== NULL
) {
2222 v9fs_post_create(s
, vs
, err
);
2224 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
2225 v9fs_create_post_perms(s
, vs
, err
);
2226 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
2228 uint32_t major
, minor
;
2231 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
2234 v9fs_post_create(s
, vs
, err
);
2246 v9fs_post_create(s
, vs
, err
);
2249 nmode
|= vs
->perm
& 0777;
2250 err
= v9fs_do_mknod(s
, vs
, nmode
, makedev(major
, minor
));
2251 v9fs_create_post_perms(s
, vs
, err
);
2252 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
2253 err
= v9fs_do_mknod(s
, vs
, S_IFIFO
| (vs
->perm
& 0777), 0);
2254 v9fs_post_create(s
, vs
, err
);
2255 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
2256 err
= v9fs_do_mknod(s
, vs
, S_IFSOCK
| (vs
->perm
& 0777), 0);
2257 v9fs_post_create(s
, vs
, err
);
2259 vs
->fidp
->fd
= v9fs_do_open2(s
, vs
);
2260 v9fs_create_post_open2(s
, vs
, err
);
2266 v9fs_post_create(s
, vs
, err
);
2269 static void v9fs_create(V9fsState
*s
, V9fsPDU
*pdu
)
2272 V9fsCreateState
*vs
;
2275 vs
= qemu_malloc(sizeof(*vs
));
2279 v9fs_string_init(&vs
->fullname
);
2281 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
2282 &vs
->perm
, &vs
->mode
, &vs
->extension
);
2284 vs
->fidp
= lookup_fid(s
, fid
);
2285 if (vs
->fidp
== NULL
) {
2290 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
2293 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
2294 v9fs_create_post_lstat(s
, vs
, err
);
2298 complete_pdu(s
, vs
->pdu
, err
);
2299 v9fs_string_free(&vs
->name
);
2300 v9fs_string_free(&vs
->extension
);
2304 static void v9fs_flush(V9fsState
*s
, V9fsPDU
*pdu
)
2306 /* A nop call with no return */
2307 complete_pdu(s
, pdu
, 7);
2310 static void v9fs_link(V9fsState
*s
, V9fsPDU
*pdu
)
2312 int32_t dfid
, oldfid
;
2313 V9fsFidState
*dfidp
, *oldfidp
;
2314 V9fsString name
, fullname
;
2318 v9fs_string_init(&fullname
);
2320 pdu_unmarshal(pdu
, offset
, "dds", &dfid
, &oldfid
, &name
);
2322 dfidp
= lookup_fid(s
, dfid
);
2323 if (dfidp
== NULL
) {
2328 oldfidp
= lookup_fid(s
, oldfid
);
2329 if (oldfidp
== NULL
) {
2334 v9fs_string_sprintf(&fullname
, "%s/%s", dfidp
->path
.data
, name
.data
);
2336 err
= v9fs_do_link(s
, &oldfidp
->path
, &fullname
);
2340 v9fs_string_free(&fullname
);
2343 v9fs_string_free(&name
);
2344 complete_pdu(s
, pdu
, err
);
2347 static void v9fs_remove_post_remove(V9fsState
*s
, V9fsRemoveState
*vs
,
2356 /* For TREMOVE we need to clunk the fid even on failed remove */
2357 free_fid(s
, vs
->fidp
->fid
);
2359 complete_pdu(s
, vs
->pdu
, err
);
2363 static void v9fs_remove(V9fsState
*s
, V9fsPDU
*pdu
)
2366 V9fsRemoveState
*vs
;
2369 vs
= qemu_malloc(sizeof(*vs
));
2373 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
2375 vs
->fidp
= lookup_fid(s
, fid
);
2376 if (vs
->fidp
== NULL
) {
2381 err
= v9fs_do_remove(s
, &vs
->fidp
->path
);
2382 v9fs_remove_post_remove(s
, vs
, err
);
2386 complete_pdu(s
, pdu
, err
);
2390 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2399 v9fs_stat_free(&vs
->v9stat
);
2400 complete_pdu(s
, vs
->pdu
, err
);
2404 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2410 if (vs
->v9stat
.name
.size
!= 0) {
2411 v9fs_string_free(&vs
->nname
);
2414 if (vs
->v9stat
.length
!= -1) {
2415 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
2419 v9fs_wstat_post_truncate(s
, vs
, err
);
2423 v9fs_stat_free(&vs
->v9stat
);
2424 complete_pdu(s
, vs
->pdu
, err
);
2428 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2435 if (vs
->v9stat
.name
.size
!= 0) {
2436 char *old_name
, *new_name
;
2439 old_name
= vs
->fidp
->path
.data
;
2440 end
= strrchr(old_name
, '/');
2447 new_name
= qemu_mallocz(end
- old_name
+ vs
->v9stat
.name
.size
+ 1);
2449 memcpy(new_name
, old_name
, end
- old_name
);
2450 memcpy(new_name
+ (end
- old_name
), vs
->v9stat
.name
.data
,
2451 vs
->v9stat
.name
.size
);
2452 vs
->nname
.data
= new_name
;
2453 vs
->nname
.size
= strlen(new_name
);
2455 if (strcmp(new_name
, vs
->fidp
->path
.data
) != 0) {
2456 if (v9fs_do_rename(s
, &vs
->fidp
->path
, &vs
->nname
)) {
2460 * Fixup fid's pointing to the old name to
2461 * start pointing to the new name
2463 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
2465 if (vs
->fidp
== fidp
) {
2467 * we replace name of this fid towards the end
2468 * so that our below strcmp will work
2472 if (!strncmp(vs
->fidp
->path
.data
, fidp
->path
.data
,
2473 strlen(vs
->fidp
->path
.data
))) {
2474 /* replace the name */
2475 v9fs_fix_path(&fidp
->path
, &vs
->nname
,
2476 strlen(vs
->fidp
->path
.data
));
2479 v9fs_string_copy(&vs
->fidp
->path
, &vs
->nname
);
2483 v9fs_wstat_post_rename(s
, vs
, err
);
2487 v9fs_stat_free(&vs
->v9stat
);
2488 complete_pdu(s
, vs
->pdu
, err
);
2492 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2498 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2499 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2500 vs
->v9stat
.n_gid
)) {
2504 v9fs_wstat_post_chown(s
, vs
, err
);
2508 v9fs_stat_free(&vs
->v9stat
);
2509 complete_pdu(s
, vs
->pdu
, err
);
2513 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2519 if (vs
->v9stat
.mtime
!= -1 || vs
->v9stat
.atime
!= -1) {
2520 struct timespec times
[2];
2521 if (vs
->v9stat
.atime
!= -1) {
2522 times
[0].tv_sec
= vs
->v9stat
.atime
;
2523 times
[0].tv_nsec
= 0;
2525 times
[0].tv_nsec
= UTIME_OMIT
;
2527 if (vs
->v9stat
.mtime
!= -1) {
2528 times
[1].tv_sec
= vs
->v9stat
.mtime
;
2529 times
[1].tv_nsec
= 0;
2531 times
[1].tv_nsec
= UTIME_OMIT
;
2534 if (v9fs_do_utimensat(s
, &vs
->fidp
->path
, times
)) {
2539 v9fs_wstat_post_utime(s
, vs
, err
);
2543 v9fs_stat_free(&vs
->v9stat
);
2544 complete_pdu(s
, vs
->pdu
, err
);
2548 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2553 v9fs_stat_free(&vs
->v9stat
);
2554 complete_pdu(s
, vs
->pdu
, err
);
2558 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2567 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2569 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2570 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2571 /* Attempting to change the type */
2576 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2577 &vs
->v9stat
.extension
))) {
2580 v9fs_wstat_post_chmod(s
, vs
, err
);
2584 v9fs_stat_free(&vs
->v9stat
);
2585 complete_pdu(s
, vs
->pdu
, err
);
2589 static void v9fs_wstat(V9fsState
*s
, V9fsPDU
*pdu
)
2595 vs
= qemu_malloc(sizeof(*vs
));
2599 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2601 vs
->fidp
= lookup_fid(s
, fid
);
2602 if (vs
->fidp
== NULL
) {
2607 /* do we need to sync the file? */
2608 if (donttouch_stat(&vs
->v9stat
)) {
2609 err
= v9fs_do_fsync(s
, vs
->fidp
->fd
);
2610 v9fs_wstat_post_fsync(s
, vs
, err
);
2614 if (vs
->v9stat
.mode
!= -1) {
2615 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2616 v9fs_wstat_post_lstat(s
, vs
, err
);
2620 v9fs_wstat_post_chmod(s
, vs
, err
);
2624 v9fs_stat_free(&vs
->v9stat
);
2625 complete_pdu(s
, vs
->pdu
, err
);
2629 static void v9fs_statfs_post_statfs(V9fsState
*s
, V9fsStatfsState
*vs
, int err
)
2631 int32_t bsize_factor
;
2639 * compute bsize factor based on host file system block size
2642 bsize_factor
= (s
->msize
- P9_IOHDRSZ
)/vs
->stbuf
.f_bsize
;
2643 if (!bsize_factor
) {
2646 vs
->v9statfs
.f_type
= vs
->stbuf
.f_type
;
2647 vs
->v9statfs
.f_bsize
= vs
->stbuf
.f_bsize
;
2648 vs
->v9statfs
.f_bsize
*= bsize_factor
;
2650 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
2651 * adjust(divide) the number of blocks, free blocks and available
2652 * blocks by bsize factor
2654 vs
->v9statfs
.f_blocks
= vs
->stbuf
.f_blocks
/bsize_factor
;
2655 vs
->v9statfs
.f_bfree
= vs
->stbuf
.f_bfree
/bsize_factor
;
2656 vs
->v9statfs
.f_bavail
= vs
->stbuf
.f_bavail
/bsize_factor
;
2657 vs
->v9statfs
.f_files
= vs
->stbuf
.f_files
;
2658 vs
->v9statfs
.f_ffree
= vs
->stbuf
.f_ffree
;
2659 vs
->v9statfs
.fsid_val
= (unsigned int) vs
->stbuf
.f_fsid
.__val
[0] |
2660 (unsigned long long)vs
->stbuf
.f_fsid
.__val
[1] << 32;
2661 vs
->v9statfs
.f_namelen
= vs
->stbuf
.f_namelen
;
2663 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "ddqqqqqqd",
2664 vs
->v9statfs
.f_type
, vs
->v9statfs
.f_bsize
, vs
->v9statfs
.f_blocks
,
2665 vs
->v9statfs
.f_bfree
, vs
->v9statfs
.f_bavail
, vs
->v9statfs
.f_files
,
2666 vs
->v9statfs
.f_ffree
, vs
->v9statfs
.fsid_val
,
2667 vs
->v9statfs
.f_namelen
);
2670 complete_pdu(s
, vs
->pdu
, vs
->offset
);
2674 static void v9fs_statfs(V9fsState
*s
, V9fsPDU
*pdu
)
2676 V9fsStatfsState
*vs
;
2679 vs
= qemu_malloc(sizeof(*vs
));
2683 memset(&vs
->v9statfs
, 0, sizeof(vs
->v9statfs
));
2685 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &vs
->fid
);
2687 vs
->fidp
= lookup_fid(s
, vs
->fid
);
2688 if (vs
->fidp
== NULL
) {
2693 err
= v9fs_do_statfs(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2694 v9fs_statfs_post_statfs(s
, vs
, err
);
2698 complete_pdu(s
, vs
->pdu
, err
);
2702 typedef void (pdu_handler_t
)(V9fsState
*s
, V9fsPDU
*pdu
);
2704 static pdu_handler_t
*pdu_handlers
[] = {
2705 [P9_TREADDIR
] = v9fs_readdir
,
2706 [P9_TSTATFS
] = v9fs_statfs
,
2707 [P9_TGETATTR
] = v9fs_getattr
,
2708 [P9_TSETATTR
] = v9fs_setattr
,
2709 [P9_TVERSION
] = v9fs_version
,
2710 [P9_TATTACH
] = v9fs_attach
,
2711 [P9_TSTAT
] = v9fs_stat
,
2712 [P9_TWALK
] = v9fs_walk
,
2713 [P9_TCLUNK
] = v9fs_clunk
,
2714 [P9_TOPEN
] = v9fs_open
,
2715 [P9_TREAD
] = v9fs_read
,
2717 [P9_TAUTH
] = v9fs_auth
,
2719 [P9_TFLUSH
] = v9fs_flush
,
2720 [P9_TLINK
] = v9fs_link
,
2721 [P9_TCREATE
] = v9fs_create
,
2722 [P9_TWRITE
] = v9fs_write
,
2723 [P9_TWSTAT
] = v9fs_wstat
,
2724 [P9_TREMOVE
] = v9fs_remove
,
2727 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
2729 pdu_handler_t
*handler
;
2735 BUG_ON(pdu
->id
>= ARRAY_SIZE(pdu_handlers
));
2737 handler
= pdu_handlers
[pdu
->id
];
2738 BUG_ON(handler
== NULL
);
2743 static void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
2745 V9fsState
*s
= (V9fsState
*)vdev
;
2749 while ((pdu
= alloc_pdu(s
)) &&
2750 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
2753 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
2754 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
2756 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
2758 memcpy(&pdu
->size
, ptr
, 4);
2760 memcpy(&pdu
->tag
, ptr
+ 5, 2);
2768 static uint32_t virtio_9p_get_features(VirtIODevice
*vdev
, uint32_t features
)
2770 features
|= 1 << VIRTIO_9P_MOUNT_TAG
;
2774 static V9fsState
*to_virtio_9p(VirtIODevice
*vdev
)
2776 return (V9fsState
*)vdev
;
2779 static void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
2781 struct virtio_9p_config
*cfg
;
2782 V9fsState
*s
= to_virtio_9p(vdev
);
2784 cfg
= qemu_mallocz(sizeof(struct virtio_9p_config
) +
2786 stw_raw(&cfg
->tag_len
, s
->tag_len
);
2787 memcpy(cfg
->tag
, s
->tag
, s
->tag_len
);
2788 memcpy(config
, cfg
, s
->config_size
);
2792 VirtIODevice
*virtio_9p_init(DeviceState
*dev
, V9fsConf
*conf
)
2800 s
= (V9fsState
*)virtio_common_init("virtio-9p",
2802 sizeof(struct virtio_9p_config
)+
2806 /* initialize pdu allocator */
2807 QLIST_INIT(&s
->free_list
);
2808 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
2809 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
2812 s
->vq
= virtio_add_queue(&s
->vdev
, MAX_REQ
, handle_9p_output
);
2814 fse
= get_fsdev_fsentry(conf
->fsdev_id
);
2817 /* We don't have a fsdev identified by fsdev_id */
2818 fprintf(stderr
, "Virtio-9p device couldn't find fsdev "
2819 "with the id %s\n", conf
->fsdev_id
);
2823 if (!fse
->path
|| !conf
->tag
) {
2824 /* we haven't specified a mount_tag or the path */
2825 fprintf(stderr
, "fsdev with id %s needs path "
2826 "and Virtio-9p device needs mount_tag arguments\n",
2831 if (!strcmp(fse
->security_model
, "passthrough")) {
2832 /* Files on the Fileserver set to client user credentials */
2833 s
->ctx
.fs_sm
= SM_PASSTHROUGH
;
2834 } else if (!strcmp(fse
->security_model
, "mapped")) {
2835 /* Files on the fileserver are set to QEMU credentials.
2836 * Client user credentials are saved in extended attributes.
2838 s
->ctx
.fs_sm
= SM_MAPPED
;
2840 /* user haven't specified a correct security option */
2841 fprintf(stderr
, "one of the following must be specified as the"
2842 "security option:\n\t security_model=passthrough \n\t "
2843 "security_model=mapped\n");
2847 if (lstat(fse
->path
, &stat
)) {
2848 fprintf(stderr
, "share path %s does not exist\n", fse
->path
);
2850 } else if (!S_ISDIR(stat
.st_mode
)) {
2851 fprintf(stderr
, "share path %s is not a directory \n", fse
->path
);
2855 s
->ctx
.fs_root
= qemu_strdup(fse
->path
);
2856 len
= strlen(conf
->tag
);
2857 if (len
> MAX_TAG_LEN
) {
2860 /* s->tag is non-NULL terminated string */
2861 s
->tag
= qemu_malloc(len
);
2862 memcpy(s
->tag
, conf
->tag
, len
);
2867 s
->vdev
.get_features
= virtio_9p_get_features
;
2868 s
->config_size
= sizeof(struct virtio_9p_config
) +
2870 s
->vdev
.get_config
= virtio_9p_get_config
;