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_utime(V9fsState
*s
, V9fsString
*path
,
241 const struct utimbuf
*buf
)
243 return s
->ops
->utime(&s
->ctx
, path
->data
, buf
);
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 void v9fs_string_init(V9fsString
*str
)
262 static void v9fs_string_free(V9fsString
*str
)
264 qemu_free(str
->data
);
269 static void v9fs_string_null(V9fsString
*str
)
271 v9fs_string_free(str
);
274 static int number_to_string(void *arg
, char type
)
276 unsigned int ret
= 0;
280 unsigned int num
= *(unsigned int *)arg
;
289 printf("Number_to_string: Unknown number format\n");
296 static int v9fs_string_alloc_printf(char **strp
, const char *fmt
, va_list ap
)
299 char *iter
= (char *)fmt
;
303 unsigned int arg_uint
;
305 /* Find the number of %'s that denotes an argument */
306 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
311 len
= strlen(fmt
) - 2*nr_args
;
321 /* Now parse the format string */
322 for (iter
= strstr(iter
, "%"); iter
; iter
= strstr(iter
, "%")) {
326 arg_uint
= va_arg(ap2
, unsigned int);
327 len
+= number_to_string((void *)&arg_uint
, 'u');
330 arg_char_ptr
= va_arg(ap2
, char *);
331 len
+= strlen(arg_char_ptr
);
338 "v9fs_string_alloc_printf:Incorrect format %c", *iter
);
345 *strp
= qemu_malloc((len
+ 1) * sizeof(**strp
));
347 return vsprintf(*strp
, fmt
, ap
);
350 static void v9fs_string_sprintf(V9fsString
*str
, const char *fmt
, ...)
355 v9fs_string_free(str
);
358 err
= v9fs_string_alloc_printf(&str
->data
, fmt
, ap
);
365 static void v9fs_string_copy(V9fsString
*lhs
, V9fsString
*rhs
)
367 v9fs_string_free(lhs
);
368 v9fs_string_sprintf(lhs
, "%s", rhs
->data
);
371 static size_t v9fs_string_size(V9fsString
*str
)
376 static V9fsFidState
*lookup_fid(V9fsState
*s
, int32_t fid
)
380 for (f
= s
->fid_list
; f
; f
= f
->next
) {
389 static V9fsFidState
*alloc_fid(V9fsState
*s
, int32_t fid
)
393 f
= lookup_fid(s
, fid
);
398 f
= qemu_mallocz(sizeof(V9fsFidState
));
404 f
->next
= s
->fid_list
;
410 static int free_fid(V9fsState
*s
, int32_t fid
)
412 V9fsFidState
**fidpp
, *fidp
;
414 for (fidpp
= &s
->fid_list
; *fidpp
; fidpp
= &(*fidpp
)->next
) {
415 if ((*fidpp
)->fid
== fid
) {
420 if (*fidpp
== NULL
) {
427 if (fidp
->fd
!= -1) {
428 v9fs_do_close(s
, fidp
->fd
);
431 v9fs_do_closedir(s
, fidp
->dir
);
433 v9fs_string_free(&fidp
->path
);
439 #define P9_QID_TYPE_DIR 0x80
440 #define P9_QID_TYPE_SYMLINK 0x02
442 #define P9_STAT_MODE_DIR 0x80000000
443 #define P9_STAT_MODE_APPEND 0x40000000
444 #define P9_STAT_MODE_EXCL 0x20000000
445 #define P9_STAT_MODE_MOUNT 0x10000000
446 #define P9_STAT_MODE_AUTH 0x08000000
447 #define P9_STAT_MODE_TMP 0x04000000
448 #define P9_STAT_MODE_SYMLINK 0x02000000
449 #define P9_STAT_MODE_LINK 0x01000000
450 #define P9_STAT_MODE_DEVICE 0x00800000
451 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
452 #define P9_STAT_MODE_SOCKET 0x00100000
453 #define P9_STAT_MODE_SETUID 0x00080000
454 #define P9_STAT_MODE_SETGID 0x00040000
455 #define P9_STAT_MODE_SETVTX 0x00010000
457 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
458 P9_STAT_MODE_SYMLINK | \
459 P9_STAT_MODE_LINK | \
460 P9_STAT_MODE_DEVICE | \
461 P9_STAT_MODE_NAMED_PIPE | \
464 /* This is the algorithm from ufs in spfs */
465 static void stat_to_qid(const struct stat
*stbuf
, V9fsQID
*qidp
)
469 size
= MIN(sizeof(stbuf
->st_ino
), sizeof(qidp
->path
));
470 memcpy(&qidp
->path
, &stbuf
->st_ino
, size
);
471 qidp
->version
= stbuf
->st_mtime
^ (stbuf
->st_size
<< 8);
473 if (S_ISDIR(stbuf
->st_mode
)) {
474 qidp
->type
|= P9_QID_TYPE_DIR
;
476 if (S_ISLNK(stbuf
->st_mode
)) {
477 qidp
->type
|= P9_QID_TYPE_SYMLINK
;
481 static int fid_to_qid(V9fsState
*s
, V9fsFidState
*fidp
, V9fsQID
*qidp
)
486 err
= v9fs_do_lstat(s
, &fidp
->path
, &stbuf
);
491 stat_to_qid(&stbuf
, qidp
);
495 static V9fsPDU
*alloc_pdu(V9fsState
*s
)
499 if (!QLIST_EMPTY(&s
->free_list
)) {
500 pdu
= QLIST_FIRST(&s
->free_list
);
501 QLIST_REMOVE(pdu
, next
);
506 static void free_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
509 QLIST_INSERT_HEAD(&s
->free_list
, pdu
, next
);
513 size_t pdu_packunpack(void *addr
, struct iovec
*sg
, int sg_count
,
514 size_t offset
, size_t size
, int pack
)
519 for (i
= 0; size
&& i
< sg_count
; i
++) {
521 if (offset
>= sg
[i
].iov_len
) {
523 offset
-= sg
[i
].iov_len
;
526 len
= MIN(sg
[i
].iov_len
- offset
, size
);
528 memcpy(sg
[i
].iov_base
+ offset
, addr
, len
);
530 memcpy(addr
, sg
[i
].iov_base
+ offset
, len
);
545 static size_t pdu_unpack(void *dst
, V9fsPDU
*pdu
, size_t offset
, size_t size
)
547 return pdu_packunpack(dst
, pdu
->elem
.out_sg
, pdu
->elem
.out_num
,
551 static size_t pdu_pack(V9fsPDU
*pdu
, size_t offset
, const void *src
,
554 return pdu_packunpack((void *)src
, pdu
->elem
.in_sg
, pdu
->elem
.in_num
,
558 static int pdu_copy_sg(V9fsPDU
*pdu
, size_t offset
, int rx
, struct iovec
*sg
)
562 struct iovec
*src_sg
;
566 src_sg
= pdu
->elem
.in_sg
;
567 num
= pdu
->elem
.in_num
;
569 src_sg
= pdu
->elem
.out_sg
;
570 num
= pdu
->elem
.out_num
;
574 for (i
= 0; i
< num
; i
++) {
576 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
577 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
579 } else if (offset
< (src_sg
[i
].iov_len
+ pos
)) {
580 sg
[j
].iov_base
= src_sg
[i
].iov_base
;
581 sg
[j
].iov_len
= src_sg
[i
].iov_len
;
582 sg
[j
].iov_base
+= (offset
- pos
);
583 sg
[j
].iov_len
-= (offset
- pos
);
586 pos
+= src_sg
[i
].iov_len
;
592 static size_t pdu_unmarshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
594 size_t old_offset
= offset
;
599 for (i
= 0; fmt
[i
]; i
++) {
602 uint8_t *valp
= va_arg(ap
, uint8_t *);
603 offset
+= pdu_unpack(valp
, pdu
, offset
, sizeof(*valp
));
608 valp
= va_arg(ap
, uint16_t *);
609 val
= le16_to_cpupu(valp
);
610 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
616 valp
= va_arg(ap
, uint32_t *);
617 val
= le32_to_cpupu(valp
);
618 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
624 valp
= va_arg(ap
, uint64_t *);
625 val
= le64_to_cpup(valp
);
626 offset
+= pdu_unpack(&val
, pdu
, offset
, sizeof(val
));
631 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
632 int *iovcnt
= va_arg(ap
, int *);
633 *iovcnt
= pdu_copy_sg(pdu
, offset
, 0, iov
);
637 V9fsString
*str
= va_arg(ap
, V9fsString
*);
638 offset
+= pdu_unmarshal(pdu
, offset
, "w", &str
->size
);
639 /* FIXME: sanity check str->size */
640 str
->data
= qemu_malloc(str
->size
+ 1);
641 offset
+= pdu_unpack(str
->data
, pdu
, offset
, str
->size
);
642 str
->data
[str
->size
] = 0;
646 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
647 offset
+= pdu_unmarshal(pdu
, offset
, "bdq",
648 &qidp
->type
, &qidp
->version
, &qidp
->path
);
652 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
653 offset
+= pdu_unmarshal(pdu
, offset
, "wwdQdddqsssssddd",
654 &statp
->size
, &statp
->type
, &statp
->dev
,
655 &statp
->qid
, &statp
->mode
, &statp
->atime
,
656 &statp
->mtime
, &statp
->length
,
657 &statp
->name
, &statp
->uid
, &statp
->gid
,
658 &statp
->muid
, &statp
->extension
,
659 &statp
->n_uid
, &statp
->n_gid
,
670 return offset
- old_offset
;
673 static size_t pdu_marshal(V9fsPDU
*pdu
, size_t offset
, const char *fmt
, ...)
675 size_t old_offset
= offset
;
680 for (i
= 0; fmt
[i
]; i
++) {
683 uint8_t val
= va_arg(ap
, int);
684 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
689 cpu_to_le16w(&val
, va_arg(ap
, int));
690 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
695 cpu_to_le32w(&val
, va_arg(ap
, uint32_t));
696 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
701 cpu_to_le64w(&val
, va_arg(ap
, uint64_t));
702 offset
+= pdu_pack(pdu
, offset
, &val
, sizeof(val
));
706 struct iovec
*iov
= va_arg(ap
, struct iovec
*);
707 int *iovcnt
= va_arg(ap
, int *);
708 *iovcnt
= pdu_copy_sg(pdu
, offset
, 1, iov
);
712 V9fsString
*str
= va_arg(ap
, V9fsString
*);
713 offset
+= pdu_marshal(pdu
, offset
, "w", str
->size
);
714 offset
+= pdu_pack(pdu
, offset
, str
->data
, str
->size
);
718 V9fsQID
*qidp
= va_arg(ap
, V9fsQID
*);
719 offset
+= pdu_marshal(pdu
, offset
, "bdq",
720 qidp
->type
, qidp
->version
, qidp
->path
);
724 V9fsStat
*statp
= va_arg(ap
, V9fsStat
*);
725 offset
+= pdu_marshal(pdu
, offset
, "wwdQdddqsssssddd",
726 statp
->size
, statp
->type
, statp
->dev
,
727 &statp
->qid
, statp
->mode
, statp
->atime
,
728 statp
->mtime
, statp
->length
, &statp
->name
,
729 &statp
->uid
, &statp
->gid
, &statp
->muid
,
730 &statp
->extension
, statp
->n_uid
,
731 statp
->n_gid
, statp
->n_muid
);
740 return offset
- old_offset
;
743 static void complete_pdu(V9fsState
*s
, V9fsPDU
*pdu
, ssize_t len
)
745 int8_t id
= pdu
->id
+ 1; /* Response */
751 str
.data
= strerror(err
);
752 str
.size
= strlen(str
.data
);
755 len
+= pdu_marshal(pdu
, len
, "s", &str
);
757 len
+= pdu_marshal(pdu
, len
, "d", err
);
763 /* fill out the header */
764 pdu_marshal(pdu
, 0, "dbw", (int32_t)len
, id
, pdu
->tag
);
766 /* keep these in sync */
770 /* push onto queue and notify */
771 virtqueue_push(s
->vq
, &pdu
->elem
, len
);
773 /* FIXME: we should batch these completions */
774 virtio_notify(&s
->vdev
, s
->vq
);
779 static mode_t
v9mode_to_mode(uint32_t mode
, V9fsString
*extension
)
784 if (mode
& P9_STAT_MODE_DIR
) {
789 if (mode
& P9_STAT_MODE_SYMLINK
) {
792 if (mode
& P9_STAT_MODE_SOCKET
) {
795 if (mode
& P9_STAT_MODE_NAMED_PIPE
) {
798 if (mode
& P9_STAT_MODE_DEVICE
) {
799 if (extension
&& extension
->data
[0] == 'c') {
811 if (mode
& P9_STAT_MODE_SETUID
) {
814 if (mode
& P9_STAT_MODE_SETGID
) {
817 if (mode
& P9_STAT_MODE_SETVTX
) {
824 static int donttouch_stat(V9fsStat
*stat
)
826 if (stat
->type
== -1 &&
828 stat
->qid
.type
== -1 &&
829 stat
->qid
.version
== -1 &&
830 stat
->qid
.path
== -1 &&
834 stat
->length
== -1 &&
841 stat
->n_muid
== -1) {
848 static void v9fs_stat_free(V9fsStat
*stat
)
850 v9fs_string_free(&stat
->name
);
851 v9fs_string_free(&stat
->uid
);
852 v9fs_string_free(&stat
->gid
);
853 v9fs_string_free(&stat
->muid
);
854 v9fs_string_free(&stat
->extension
);
857 static uint32_t stat_to_v9mode(const struct stat
*stbuf
)
861 mode
= stbuf
->st_mode
& 0777;
862 if (S_ISDIR(stbuf
->st_mode
)) {
863 mode
|= P9_STAT_MODE_DIR
;
867 if (S_ISLNK(stbuf
->st_mode
)) {
868 mode
|= P9_STAT_MODE_SYMLINK
;
871 if (S_ISSOCK(stbuf
->st_mode
)) {
872 mode
|= P9_STAT_MODE_SOCKET
;
875 if (S_ISFIFO(stbuf
->st_mode
)) {
876 mode
|= P9_STAT_MODE_NAMED_PIPE
;
879 if (S_ISBLK(stbuf
->st_mode
) || S_ISCHR(stbuf
->st_mode
)) {
880 mode
|= P9_STAT_MODE_DEVICE
;
883 if (stbuf
->st_mode
& S_ISUID
) {
884 mode
|= P9_STAT_MODE_SETUID
;
887 if (stbuf
->st_mode
& S_ISGID
) {
888 mode
|= P9_STAT_MODE_SETGID
;
891 if (stbuf
->st_mode
& S_ISVTX
) {
892 mode
|= P9_STAT_MODE_SETVTX
;
899 static int stat_to_v9stat(V9fsState
*s
, V9fsString
*name
,
900 const struct stat
*stbuf
,
906 memset(v9stat
, 0, sizeof(*v9stat
));
908 stat_to_qid(stbuf
, &v9stat
->qid
);
909 v9stat
->mode
= stat_to_v9mode(stbuf
);
910 v9stat
->atime
= stbuf
->st_atime
;
911 v9stat
->mtime
= stbuf
->st_mtime
;
912 v9stat
->length
= stbuf
->st_size
;
914 v9fs_string_null(&v9stat
->uid
);
915 v9fs_string_null(&v9stat
->gid
);
916 v9fs_string_null(&v9stat
->muid
);
919 v9stat
->n_uid
= stbuf
->st_uid
;
920 v9stat
->n_gid
= stbuf
->st_gid
;
923 v9fs_string_null(&v9stat
->extension
);
925 if (v9stat
->mode
& P9_STAT_MODE_SYMLINK
) {
926 err
= v9fs_do_readlink(s
, name
, &v9stat
->extension
);
931 v9stat
->extension
.data
[err
] = 0;
932 v9stat
->extension
.size
= err
;
933 } else if (v9stat
->mode
& P9_STAT_MODE_DEVICE
) {
934 v9fs_string_sprintf(&v9stat
->extension
, "%c %u %u",
935 S_ISCHR(stbuf
->st_mode
) ? 'c' : 'b',
936 major(stbuf
->st_rdev
), minor(stbuf
->st_rdev
));
937 } else if (S_ISDIR(stbuf
->st_mode
) || S_ISREG(stbuf
->st_mode
)) {
938 v9fs_string_sprintf(&v9stat
->extension
, "%s %u",
939 "HARDLINKCOUNT", stbuf
->st_nlink
);
943 str
= strrchr(name
->data
, '/');
950 v9fs_string_sprintf(&v9stat
->name
, "%s", str
);
953 v9fs_string_size(&v9stat
->name
) +
954 v9fs_string_size(&v9stat
->uid
) +
955 v9fs_string_size(&v9stat
->gid
) +
956 v9fs_string_size(&v9stat
->muid
) +
957 v9fs_string_size(&v9stat
->extension
);
961 static struct iovec
*adjust_sg(struct iovec
*sg
, int len
, int *iovcnt
)
963 while (len
&& *iovcnt
) {
964 if (len
< sg
->iov_len
) {
978 static struct iovec
*cap_sg(struct iovec
*sg
, int cap
, int *cnt
)
983 for (i
= 0; i
< *cnt
; i
++) {
984 if ((total
+ sg
[i
].iov_len
) > cap
) {
985 sg
[i
].iov_len
-= ((total
+ sg
[i
].iov_len
) - cap
);
989 total
+= sg
[i
].iov_len
;
997 static void print_sg(struct iovec
*sg
, int cnt
)
1001 printf("sg[%d]: {", cnt
);
1002 for (i
= 0; i
< cnt
; i
++) {
1006 printf("(%p, %zd)", sg
[i
].iov_base
, sg
[i
].iov_len
);
1011 static void v9fs_fix_path(V9fsString
*dst
, V9fsString
*src
, int len
)
1014 v9fs_string_init(&str
);
1015 v9fs_string_copy(&str
, dst
);
1016 v9fs_string_sprintf(dst
, "%s%s", src
->data
, str
.data
+len
);
1017 v9fs_string_free(&str
);
1020 static void v9fs_version(V9fsState
*s
, V9fsPDU
*pdu
)
1026 pdu_unmarshal(pdu
, offset
, "ds", &msize
, &version
);
1028 if (strcmp(version
.data
, "9P2000.u")) {
1029 v9fs_string_sprintf(&version
, "unknown");
1032 offset
+= pdu_marshal(pdu
, offset
, "ds", msize
, &version
);
1033 complete_pdu(s
, pdu
, offset
);
1035 v9fs_string_free(&version
);
1038 static void v9fs_attach(V9fsState
*s
, V9fsPDU
*pdu
)
1040 int32_t fid
, afid
, n_uname
;
1041 V9fsString uname
, aname
;
1047 pdu_unmarshal(pdu
, offset
, "ddssd", &fid
, &afid
, &uname
, &aname
, &n_uname
);
1049 fidp
= alloc_fid(s
, fid
);
1055 fidp
->uid
= n_uname
;
1057 v9fs_string_sprintf(&fidp
->path
, "%s", "/");
1058 err
= fid_to_qid(s
, fidp
, &qid
);
1065 offset
+= pdu_marshal(pdu
, offset
, "Q", &qid
);
1069 complete_pdu(s
, pdu
, err
);
1070 v9fs_string_free(&uname
);
1071 v9fs_string_free(&aname
);
1074 static void v9fs_stat_post_lstat(V9fsState
*s
, V9fsStatState
*vs
, int err
)
1081 err
= stat_to_v9stat(s
, &vs
->fidp
->path
, &vs
->stbuf
, &vs
->v9stat
);
1085 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "wS", 0, &vs
->v9stat
);
1089 complete_pdu(s
, vs
->pdu
, err
);
1090 v9fs_stat_free(&vs
->v9stat
);
1094 static void v9fs_stat(V9fsState
*s
, V9fsPDU
*pdu
)
1100 vs
= qemu_malloc(sizeof(*vs
));
1104 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1106 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1108 vs
->fidp
= lookup_fid(s
, fid
);
1109 if (vs
->fidp
== NULL
) {
1114 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1115 v9fs_stat_post_lstat(s
, vs
, err
);
1119 complete_pdu(s
, vs
->pdu
, err
);
1120 v9fs_stat_free(&vs
->v9stat
);
1124 static void v9fs_walk_complete(V9fsState
*s
, V9fsWalkState
*vs
, int err
)
1126 complete_pdu(s
, vs
->pdu
, err
);
1129 for (vs
->name_idx
= 0; vs
->name_idx
< vs
->nwnames
; vs
->name_idx
++) {
1130 v9fs_string_free(&vs
->wnames
[vs
->name_idx
]);
1133 qemu_free(vs
->wnames
);
1134 qemu_free(vs
->qids
);
1138 static void v9fs_walk_marshal(V9fsWalkState
*vs
)
1142 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "w", vs
->nwnames
);
1144 for (i
= 0; i
< vs
->nwnames
; i
++) {
1145 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Q", &vs
->qids
[i
]);
1149 static void v9fs_walk_post_newfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1153 free_fid(s
, vs
->newfidp
->fid
);
1154 v9fs_string_free(&vs
->path
);
1159 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1162 if (vs
->name_idx
< vs
->nwnames
) {
1163 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1164 vs
->wnames
[vs
->name_idx
].data
);
1165 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1167 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1168 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1172 v9fs_string_free(&vs
->path
);
1173 v9fs_walk_marshal(vs
);
1176 v9fs_walk_complete(s
, vs
, err
);
1179 static void v9fs_walk_post_oldfid_lstat(V9fsState
*s
, V9fsWalkState
*vs
,
1183 v9fs_string_free(&vs
->path
);
1188 stat_to_qid(&vs
->stbuf
, &vs
->qids
[vs
->name_idx
]);
1190 if (vs
->name_idx
< vs
->nwnames
) {
1192 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1193 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1194 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1196 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1197 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1201 v9fs_string_free(&vs
->path
);
1202 v9fs_walk_marshal(vs
);
1205 v9fs_walk_complete(s
, vs
, err
);
1208 static void v9fs_walk(V9fsState
*s
, V9fsPDU
*pdu
)
1210 int32_t fid
, newfid
;
1215 vs
= qemu_malloc(sizeof(*vs
));
1221 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "ddw", &fid
,
1222 &newfid
, &vs
->nwnames
);
1225 vs
->wnames
= qemu_mallocz(sizeof(vs
->wnames
[0]) * vs
->nwnames
);
1227 vs
->qids
= qemu_mallocz(sizeof(vs
->qids
[0]) * vs
->nwnames
);
1229 for (i
= 0; i
< vs
->nwnames
; i
++) {
1230 vs
->offset
+= pdu_unmarshal(vs
->pdu
, vs
->offset
, "s",
1235 vs
->fidp
= lookup_fid(s
, fid
);
1236 if (vs
->fidp
== NULL
) {
1241 /* FIXME: is this really valid? */
1242 if (fid
== newfid
) {
1244 BUG_ON(vs
->fidp
->fd
!= -1);
1245 BUG_ON(vs
->fidp
->dir
);
1246 v9fs_string_init(&vs
->path
);
1249 if (vs
->name_idx
< vs
->nwnames
) {
1250 v9fs_string_sprintf(&vs
->path
, "%s/%s",
1251 vs
->fidp
->path
.data
, vs
->wnames
[vs
->name_idx
].data
);
1252 v9fs_string_copy(&vs
->fidp
->path
, &vs
->path
);
1254 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1255 v9fs_walk_post_oldfid_lstat(s
, vs
, err
);
1259 vs
->newfidp
= alloc_fid(s
, newfid
);
1260 if (vs
->newfidp
== NULL
) {
1265 vs
->newfidp
->uid
= vs
->fidp
->uid
;
1266 v9fs_string_init(&vs
->path
);
1268 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->fidp
->path
);
1270 if (vs
->name_idx
< vs
->nwnames
) {
1271 v9fs_string_sprintf(&vs
->path
, "%s/%s", vs
->newfidp
->path
.data
,
1272 vs
->wnames
[vs
->name_idx
].data
);
1273 v9fs_string_copy(&vs
->newfidp
->path
, &vs
->path
);
1275 err
= v9fs_do_lstat(s
, &vs
->newfidp
->path
, &vs
->stbuf
);
1276 v9fs_walk_post_newfid_lstat(s
, vs
, err
);
1281 v9fs_walk_marshal(vs
);
1284 v9fs_walk_complete(s
, vs
, err
);
1287 static void v9fs_open_post_opendir(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1289 if (vs
->fidp
->dir
== NULL
) {
1294 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1297 complete_pdu(s
, vs
->pdu
, err
);
1302 static void v9fs_open_post_open(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1304 if (vs
->fidp
->fd
== -1) {
1309 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1312 complete_pdu(s
, vs
->pdu
, err
);
1316 static void v9fs_open_post_lstat(V9fsState
*s
, V9fsOpenState
*vs
, int err
)
1323 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1325 if (S_ISDIR(vs
->stbuf
.st_mode
)) {
1326 vs
->fidp
->dir
= v9fs_do_opendir(s
, &vs
->fidp
->path
);
1327 v9fs_open_post_opendir(s
, vs
, err
);
1329 vs
->fidp
->fd
= v9fs_do_open(s
, &vs
->fidp
->path
,
1330 omode_to_uflags(vs
->mode
));
1331 v9fs_open_post_open(s
, vs
, err
);
1335 complete_pdu(s
, vs
->pdu
, err
);
1339 static void v9fs_open(V9fsState
*s
, V9fsPDU
*pdu
)
1346 vs
= qemu_malloc(sizeof(*vs
));
1350 pdu_unmarshal(vs
->pdu
, vs
->offset
, "db", &fid
, &vs
->mode
);
1352 vs
->fidp
= lookup_fid(s
, fid
);
1353 if (vs
->fidp
== NULL
) {
1358 BUG_ON(vs
->fidp
->fd
!= -1);
1359 BUG_ON(vs
->fidp
->dir
);
1361 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
1363 v9fs_open_post_lstat(s
, vs
, err
);
1366 complete_pdu(s
, pdu
, err
);
1370 static void v9fs_clunk(V9fsState
*s
, V9fsPDU
*pdu
)
1376 pdu_unmarshal(pdu
, offset
, "d", &fid
);
1378 err
= free_fid(s
, fid
);
1386 complete_pdu(s
, pdu
, err
);
1389 static void v9fs_read_post_readdir(V9fsState
*, V9fsReadState
*, ssize_t
);
1391 static void v9fs_read_post_seekdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1396 v9fs_stat_free(&vs
->v9stat
);
1397 v9fs_string_free(&vs
->name
);
1398 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1399 vs
->offset
+= vs
->count
;
1402 complete_pdu(s
, vs
->pdu
, err
);
1407 static void v9fs_read_post_dir_lstat(V9fsState
*s
, V9fsReadState
*vs
,
1414 err
= stat_to_v9stat(s
, &vs
->name
, &vs
->stbuf
, &vs
->v9stat
);
1419 vs
->len
= pdu_marshal(vs
->pdu
, vs
->offset
+ 4 + vs
->count
, "S",
1421 if ((vs
->len
!= (vs
->v9stat
.size
+ 2)) ||
1422 ((vs
->count
+ vs
->len
) > vs
->max_count
)) {
1423 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->dir_pos
);
1424 v9fs_read_post_seekdir(s
, vs
, err
);
1427 vs
->count
+= vs
->len
;
1428 v9fs_stat_free(&vs
->v9stat
);
1429 v9fs_string_free(&vs
->name
);
1430 vs
->dir_pos
= vs
->dent
->d_off
;
1431 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1432 v9fs_read_post_readdir(s
, vs
, err
);
1435 v9fs_do_seekdir(s
, vs
->fidp
->dir
, vs
->dir_pos
);
1436 v9fs_read_post_seekdir(s
, vs
, err
);
1441 static void v9fs_read_post_readdir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1444 memset(&vs
->v9stat
, 0, sizeof(vs
->v9stat
));
1445 v9fs_string_init(&vs
->name
);
1446 v9fs_string_sprintf(&vs
->name
, "%s/%s", vs
->fidp
->path
.data
,
1448 err
= v9fs_do_lstat(s
, &vs
->name
, &vs
->stbuf
);
1449 v9fs_read_post_dir_lstat(s
, vs
, err
);
1453 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->count
);
1454 vs
->offset
+= vs
->count
;
1456 complete_pdu(s
, vs
->pdu
, err
);
1461 static void v9fs_read_post_telldir(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1463 vs
->dent
= v9fs_do_readdir(s
, vs
->fidp
->dir
);
1464 v9fs_read_post_readdir(s
, vs
, err
);
1468 static void v9fs_read_post_rewinddir(V9fsState
*s
, V9fsReadState
*vs
,
1471 vs
->dir_pos
= v9fs_do_telldir(s
, vs
->fidp
->dir
);
1472 v9fs_read_post_telldir(s
, vs
, err
);
1476 static void v9fs_read_post_readv(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1479 /* IO error return the error */
1483 vs
->total
+= vs
->len
;
1484 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1485 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1488 print_sg(vs
->sg
, vs
->cnt
);
1490 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1491 } while (vs
->len
== -1 && errno
== EINTR
);
1492 if (vs
->len
== -1) {
1495 v9fs_read_post_readv(s
, vs
, err
);
1498 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1499 vs
->offset
+= vs
->count
;
1503 complete_pdu(s
, vs
->pdu
, err
);
1507 static void v9fs_read_post_lseek(V9fsState
*s
, V9fsReadState
*vs
, ssize_t err
)
1513 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1515 if (vs
->total
< vs
->count
) {
1518 print_sg(vs
->sg
, vs
->cnt
);
1520 vs
->len
= v9fs_do_readv(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1521 } while (vs
->len
== -1 && errno
== EINTR
);
1522 if (vs
->len
== -1) {
1525 v9fs_read_post_readv(s
, vs
, err
);
1529 complete_pdu(s
, vs
->pdu
, err
);
1533 static void v9fs_read(V9fsState
*s
, V9fsPDU
*pdu
)
1539 vs
= qemu_malloc(sizeof(*vs
));
1546 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqd", &fid
, &vs
->off
, &vs
->count
);
1548 vs
->fidp
= lookup_fid(s
, fid
);
1549 if (vs
->fidp
== NULL
) {
1554 if (vs
->fidp
->dir
) {
1555 vs
->max_count
= vs
->count
;
1558 v9fs_do_rewinddir(s
, vs
->fidp
->dir
);
1560 v9fs_read_post_rewinddir(s
, vs
, err
);
1562 } else if (vs
->fidp
->fd
!= -1) {
1564 pdu_marshal(vs
->pdu
, vs
->offset
+ 4, "v", vs
->sg
, &vs
->cnt
);
1565 err
= v9fs_do_lseek(s
, vs
->fidp
->fd
, vs
->off
, SEEK_SET
);
1566 v9fs_read_post_lseek(s
, vs
, err
);
1572 complete_pdu(s
, pdu
, err
);
1576 static void v9fs_write_post_writev(V9fsState
*s
, V9fsWriteState
*vs
,
1580 /* IO error return the error */
1584 vs
->total
+= vs
->len
;
1585 vs
->sg
= adjust_sg(vs
->sg
, vs
->len
, &vs
->cnt
);
1586 if (vs
->total
< vs
->count
&& vs
->len
> 0) {
1589 print_sg(vs
->sg
, vs
->cnt
);
1591 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1592 } while (vs
->len
== -1 && errno
== EINTR
);
1593 if (vs
->len
== -1) {
1596 v9fs_write_post_writev(s
, vs
, err
);
1599 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "d", vs
->total
);
1603 complete_pdu(s
, vs
->pdu
, err
);
1607 static void v9fs_write_post_lseek(V9fsState
*s
, V9fsWriteState
*vs
, ssize_t err
)
1613 vs
->sg
= cap_sg(vs
->sg
, vs
->count
, &vs
->cnt
);
1615 if (vs
->total
< vs
->count
) {
1618 print_sg(vs
->sg
, vs
->cnt
);
1620 vs
->len
= v9fs_do_writev(s
, vs
->fidp
->fd
, vs
->sg
, vs
->cnt
);
1621 } while (vs
->len
== -1 && errno
== EINTR
);
1622 if (vs
->len
== -1) {
1625 v9fs_write_post_writev(s
, vs
, err
);
1630 complete_pdu(s
, vs
->pdu
, err
);
1634 static void v9fs_write(V9fsState
*s
, V9fsPDU
*pdu
)
1640 vs
= qemu_malloc(sizeof(*vs
));
1648 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dqdv", &fid
, &vs
->off
, &vs
->count
,
1651 vs
->fidp
= lookup_fid(s
, fid
);
1652 if (vs
->fidp
== NULL
) {
1657 if (vs
->fidp
->fd
== -1) {
1662 err
= v9fs_do_lseek(s
, vs
->fidp
->fd
, vs
->off
, SEEK_SET
);
1664 v9fs_write_post_lseek(s
, vs
, err
);
1668 complete_pdu(s
, vs
->pdu
, err
);
1672 static void v9fs_post_create(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
1675 v9fs_string_copy(&vs
->fidp
->path
, &vs
->fullname
);
1676 stat_to_qid(&vs
->stbuf
, &vs
->qid
);
1678 vs
->offset
+= pdu_marshal(vs
->pdu
, vs
->offset
, "Qd", &vs
->qid
, 0);
1683 complete_pdu(s
, vs
->pdu
, err
);
1684 v9fs_string_free(&vs
->name
);
1685 v9fs_string_free(&vs
->extension
);
1686 v9fs_string_free(&vs
->fullname
);
1690 static void v9fs_create_post_perms(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
1695 v9fs_post_create(s
, vs
, err
);
1698 static void v9fs_create_post_opendir(V9fsState
*s
, V9fsCreateState
*vs
,
1701 if (!vs
->fidp
->dir
) {
1704 v9fs_post_create(s
, vs
, err
);
1707 static void v9fs_create_post_dir_lstat(V9fsState
*s
, V9fsCreateState
*vs
,
1715 vs
->fidp
->dir
= v9fs_do_opendir(s
, &vs
->fullname
);
1716 v9fs_create_post_opendir(s
, vs
, err
);
1720 v9fs_post_create(s
, vs
, err
);
1723 static void v9fs_create_post_mkdir(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
1730 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1731 v9fs_create_post_dir_lstat(s
, vs
, err
);
1735 v9fs_post_create(s
, vs
, err
);
1738 static void v9fs_create_post_fstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
1745 v9fs_post_create(s
, vs
, err
);
1749 static void v9fs_create_post_open2(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
1751 if (vs
->fidp
->fd
== -1) {
1756 err
= v9fs_do_fstat(s
, vs
->fidp
->fd
, &vs
->stbuf
);
1757 v9fs_create_post_fstat(s
, vs
, err
);
1762 v9fs_post_create(s
, vs
, err
);
1766 static void v9fs_create_post_lstat(V9fsState
*s
, V9fsCreateState
*vs
, int err
)
1769 if (err
== 0 || errno
!= ENOENT
) {
1774 if (vs
->perm
& P9_STAT_MODE_DIR
) {
1775 err
= v9fs_do_mkdir(s
, vs
);
1776 v9fs_create_post_mkdir(s
, vs
, err
);
1777 } else if (vs
->perm
& P9_STAT_MODE_SYMLINK
) {
1778 err
= v9fs_do_symlink(s
, vs
);
1779 v9fs_create_post_perms(s
, vs
, err
);
1780 } else if (vs
->perm
& P9_STAT_MODE_LINK
) {
1781 int32_t nfid
= atoi(vs
->extension
.data
);
1782 V9fsFidState
*nfidp
= lookup_fid(s
, nfid
);
1783 if (nfidp
== NULL
) {
1785 v9fs_post_create(s
, vs
, err
);
1787 err
= v9fs_do_link(s
, &nfidp
->path
, &vs
->fullname
);
1788 v9fs_create_post_perms(s
, vs
, err
);
1789 } else if (vs
->perm
& P9_STAT_MODE_DEVICE
) {
1791 uint32_t major
, minor
;
1794 if (sscanf(vs
->extension
.data
, "%c %u %u", &ctype
, &major
,
1797 v9fs_post_create(s
, vs
, err
);
1809 v9fs_post_create(s
, vs
, err
);
1812 nmode
|= vs
->perm
& 0777;
1813 err
= v9fs_do_mknod(s
, vs
, nmode
, makedev(major
, minor
));
1814 v9fs_create_post_perms(s
, vs
, err
);
1815 } else if (vs
->perm
& P9_STAT_MODE_NAMED_PIPE
) {
1816 err
= v9fs_do_mknod(s
, vs
, S_IFIFO
| (vs
->perm
& 0777), 0);
1817 v9fs_post_create(s
, vs
, err
);
1818 } else if (vs
->perm
& P9_STAT_MODE_SOCKET
) {
1819 err
= v9fs_do_mknod(s
, vs
, S_IFSOCK
| (vs
->perm
& 0777), 0);
1820 v9fs_post_create(s
, vs
, err
);
1822 vs
->fidp
->fd
= v9fs_do_open2(s
, vs
);
1823 v9fs_create_post_open2(s
, vs
, err
);
1829 v9fs_post_create(s
, vs
, err
);
1832 static void v9fs_create(V9fsState
*s
, V9fsPDU
*pdu
)
1835 V9fsCreateState
*vs
;
1838 vs
= qemu_malloc(sizeof(*vs
));
1842 v9fs_string_init(&vs
->fullname
);
1844 pdu_unmarshal(vs
->pdu
, vs
->offset
, "dsdbs", &fid
, &vs
->name
,
1845 &vs
->perm
, &vs
->mode
, &vs
->extension
);
1847 vs
->fidp
= lookup_fid(s
, fid
);
1848 if (vs
->fidp
== NULL
) {
1853 v9fs_string_sprintf(&vs
->fullname
, "%s/%s", vs
->fidp
->path
.data
,
1856 err
= v9fs_do_lstat(s
, &vs
->fullname
, &vs
->stbuf
);
1857 v9fs_create_post_lstat(s
, vs
, err
);
1861 complete_pdu(s
, vs
->pdu
, err
);
1862 v9fs_string_free(&vs
->name
);
1863 v9fs_string_free(&vs
->extension
);
1867 static void v9fs_flush(V9fsState
*s
, V9fsPDU
*pdu
)
1869 /* A nop call with no return */
1870 complete_pdu(s
, pdu
, 7);
1873 static void v9fs_remove_post_remove(V9fsState
*s
, V9fsRemoveState
*vs
,
1876 /* For TREMOVE we need to clunk the fid even on failed remove */
1877 err
= free_fid(s
, vs
->fidp
->fid
);
1884 complete_pdu(s
, vs
->pdu
, err
);
1888 static void v9fs_remove(V9fsState
*s
, V9fsPDU
*pdu
)
1891 V9fsRemoveState
*vs
;
1894 vs
= qemu_malloc(sizeof(*vs
));
1898 pdu_unmarshal(vs
->pdu
, vs
->offset
, "d", &fid
);
1900 vs
->fidp
= lookup_fid(s
, fid
);
1901 if (vs
->fidp
== NULL
) {
1906 err
= v9fs_do_remove(s
, &vs
->fidp
->path
);
1907 v9fs_remove_post_remove(s
, vs
, err
);
1911 complete_pdu(s
, pdu
, err
);
1915 static void v9fs_wstat_post_truncate(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
1924 v9fs_stat_free(&vs
->v9stat
);
1925 complete_pdu(s
, vs
->pdu
, err
);
1929 static void v9fs_wstat_post_rename(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
1935 if (vs
->v9stat
.name
.size
!= 0) {
1936 v9fs_string_free(&vs
->nname
);
1939 if (vs
->v9stat
.length
!= -1) {
1940 if (v9fs_do_truncate(s
, &vs
->fidp
->path
, vs
->v9stat
.length
) < 0) {
1944 v9fs_wstat_post_truncate(s
, vs
, err
);
1948 v9fs_stat_free(&vs
->v9stat
);
1949 complete_pdu(s
, vs
->pdu
, err
);
1953 static void v9fs_wstat_post_chown(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
1960 if (vs
->v9stat
.name
.size
!= 0) {
1961 char *old_name
, *new_name
;
1964 old_name
= vs
->fidp
->path
.data
;
1965 end
= strrchr(old_name
, '/');
1972 new_name
= qemu_malloc(end
- old_name
+ vs
->v9stat
.name
.size
+ 1);
1974 memset(new_name
, 0, end
- old_name
+ vs
->v9stat
.name
.size
+ 1);
1975 memcpy(new_name
, old_name
, end
- old_name
);
1976 memcpy(new_name
+ (end
- old_name
), vs
->v9stat
.name
.data
,
1977 vs
->v9stat
.name
.size
);
1978 vs
->nname
.data
= new_name
;
1979 vs
->nname
.size
= strlen(new_name
);
1981 if (strcmp(new_name
, vs
->fidp
->path
.data
) != 0) {
1982 if (v9fs_do_rename(s
, &vs
->fidp
->path
, &vs
->nname
)) {
1986 * Fixup fid's pointing to the old name to
1987 * start pointing to the new name
1989 for (fidp
= s
->fid_list
; fidp
; fidp
= fidp
->next
) {
1991 if (vs
->fidp
== fidp
) {
1993 * we replace name of this fid towards the end
1994 * so that our below strcmp will work
1998 if (!strncmp(vs
->fidp
->path
.data
, fidp
->path
.data
,
1999 strlen(vs
->fidp
->path
.data
))) {
2000 /* replace the name */
2001 v9fs_fix_path(&fidp
->path
, &vs
->nname
,
2002 strlen(vs
->fidp
->path
.data
));
2005 v9fs_string_copy(&vs
->fidp
->path
, &vs
->nname
);
2009 v9fs_wstat_post_rename(s
, vs
, err
);
2013 v9fs_stat_free(&vs
->v9stat
);
2014 complete_pdu(s
, vs
->pdu
, err
);
2018 static void v9fs_wstat_post_utime(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2024 if (vs
->v9stat
.n_gid
!= -1 || vs
->v9stat
.n_uid
!= -1) {
2025 if (v9fs_do_chown(s
, &vs
->fidp
->path
, vs
->v9stat
.n_uid
,
2026 vs
->v9stat
.n_gid
)) {
2030 v9fs_wstat_post_chown(s
, vs
, err
);
2034 v9fs_stat_free(&vs
->v9stat
);
2035 complete_pdu(s
, vs
->pdu
, err
);
2039 static void v9fs_wstat_post_chmod(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2045 if (vs
->v9stat
.mtime
!= -1) {
2048 tb
.modtime
= vs
->v9stat
.mtime
;
2049 if (v9fs_do_utime(s
, &vs
->fidp
->path
, &tb
)) {
2054 v9fs_wstat_post_utime(s
, vs
, err
);
2058 v9fs_stat_free(&vs
->v9stat
);
2059 complete_pdu(s
, vs
->pdu
, err
);
2063 static void v9fs_wstat_post_fsync(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2068 v9fs_stat_free(&vs
->v9stat
);
2069 complete_pdu(s
, vs
->pdu
, err
);
2073 static void v9fs_wstat_post_lstat(V9fsState
*s
, V9fsWstatState
*vs
, int err
)
2082 v9_mode
= stat_to_v9mode(&vs
->stbuf
);
2084 if ((vs
->v9stat
.mode
& P9_STAT_MODE_TYPE_BITS
) !=
2085 (v9_mode
& P9_STAT_MODE_TYPE_BITS
)) {
2086 /* Attempting to change the type */
2091 if (v9fs_do_chmod(s
, &vs
->fidp
->path
, v9mode_to_mode(vs
->v9stat
.mode
,
2092 &vs
->v9stat
.extension
))) {
2095 v9fs_wstat_post_chmod(s
, vs
, err
);
2099 v9fs_stat_free(&vs
->v9stat
);
2100 complete_pdu(s
, vs
->pdu
, err
);
2104 static void v9fs_wstat(V9fsState
*s
, V9fsPDU
*pdu
)
2110 vs
= qemu_malloc(sizeof(*vs
));
2114 pdu_unmarshal(pdu
, vs
->offset
, "dwS", &fid
, &vs
->unused
, &vs
->v9stat
);
2116 vs
->fidp
= lookup_fid(s
, fid
);
2117 if (vs
->fidp
== NULL
) {
2122 /* do we need to sync the file? */
2123 if (donttouch_stat(&vs
->v9stat
)) {
2124 err
= v9fs_do_fsync(s
, vs
->fidp
->fd
);
2125 v9fs_wstat_post_fsync(s
, vs
, err
);
2129 if (vs
->v9stat
.mode
!= -1) {
2130 err
= v9fs_do_lstat(s
, &vs
->fidp
->path
, &vs
->stbuf
);
2131 v9fs_wstat_post_lstat(s
, vs
, err
);
2135 v9fs_wstat_post_chmod(s
, vs
, err
);
2139 v9fs_stat_free(&vs
->v9stat
);
2140 complete_pdu(s
, vs
->pdu
, err
);
2144 typedef void (pdu_handler_t
)(V9fsState
*s
, V9fsPDU
*pdu
);
2146 static pdu_handler_t
*pdu_handlers
[] = {
2147 [P9_TVERSION
] = v9fs_version
,
2148 [P9_TATTACH
] = v9fs_attach
,
2149 [P9_TSTAT
] = v9fs_stat
,
2150 [P9_TWALK
] = v9fs_walk
,
2151 [P9_TCLUNK
] = v9fs_clunk
,
2152 [P9_TOPEN
] = v9fs_open
,
2153 [P9_TREAD
] = v9fs_read
,
2155 [P9_TAUTH
] = v9fs_auth
,
2157 [P9_TFLUSH
] = v9fs_flush
,
2158 [P9_TCREATE
] = v9fs_create
,
2159 [P9_TWRITE
] = v9fs_write
,
2160 [P9_TWSTAT
] = v9fs_wstat
,
2161 [P9_TREMOVE
] = v9fs_remove
,
2164 static void submit_pdu(V9fsState
*s
, V9fsPDU
*pdu
)
2166 pdu_handler_t
*handler
;
2172 BUG_ON(pdu
->id
>= ARRAY_SIZE(pdu_handlers
));
2174 handler
= pdu_handlers
[pdu
->id
];
2175 BUG_ON(handler
== NULL
);
2180 static void handle_9p_output(VirtIODevice
*vdev
, VirtQueue
*vq
)
2182 V9fsState
*s
= (V9fsState
*)vdev
;
2186 while ((pdu
= alloc_pdu(s
)) &&
2187 (len
= virtqueue_pop(vq
, &pdu
->elem
)) != 0) {
2190 BUG_ON(pdu
->elem
.out_num
== 0 || pdu
->elem
.in_num
== 0);
2191 BUG_ON(pdu
->elem
.out_sg
[0].iov_len
< 7);
2193 ptr
= pdu
->elem
.out_sg
[0].iov_base
;
2195 memcpy(&pdu
->size
, ptr
, 4);
2197 memcpy(&pdu
->tag
, ptr
+ 5, 2);
2205 static uint32_t virtio_9p_get_features(VirtIODevice
*vdev
, uint32_t features
)
2207 features
|= 1 << VIRTIO_9P_MOUNT_TAG
;
2211 static V9fsState
*to_virtio_9p(VirtIODevice
*vdev
)
2213 return (V9fsState
*)vdev
;
2216 static void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
2218 struct virtio_9p_config
*cfg
;
2219 V9fsState
*s
= to_virtio_9p(vdev
);
2221 cfg
= qemu_mallocz(sizeof(struct virtio_9p_config
) +
2223 stw_raw(&cfg
->tag_len
, s
->tag_len
);
2224 memcpy(cfg
->tag
, s
->tag
, s
->tag_len
);
2225 memcpy(config
, cfg
, s
->config_size
);
2229 VirtIODevice
*virtio_9p_init(DeviceState
*dev
, V9fsConf
*conf
)
2237 s
= (V9fsState
*)virtio_common_init("virtio-9p",
2239 sizeof(struct virtio_9p_config
)+
2243 /* initialize pdu allocator */
2244 QLIST_INIT(&s
->free_list
);
2245 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
2246 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
2249 s
->vq
= virtio_add_queue(&s
->vdev
, MAX_REQ
, handle_9p_output
);
2251 fse
= get_fsdev_fsentry(conf
->fsdev_id
);
2254 /* We don't have a fsdev identified by fsdev_id */
2255 fprintf(stderr
, "Virtio-9p device couldn't find fsdev "
2256 "with the id %s\n", conf
->fsdev_id
);
2260 if (!fse
->path
|| !conf
->tag
) {
2261 /* we haven't specified a mount_tag or the path */
2262 fprintf(stderr
, "fsdev with id %s needs path "
2263 "and Virtio-9p device needs mount_tag arguments\n",
2268 if (!strcmp(fse
->security_model
, "passthrough")) {
2269 /* Files on the Fileserver set to client user credentials */
2270 s
->ctx
.fs_sm
= SM_PASSTHROUGH
;
2271 } else if (!strcmp(fse
->security_model
, "mapped")) {
2272 /* Files on the fileserver are set to QEMU credentials.
2273 * Client user credentials are saved in extended attributes.
2275 s
->ctx
.fs_sm
= SM_MAPPED
;
2277 /* user haven't specified a correct security option */
2278 fprintf(stderr
, "one of the following must be specified as the"
2279 "security option:\n\t security_model=passthrough \n\t "
2280 "security_model=mapped\n");
2284 if (lstat(fse
->path
, &stat
)) {
2285 fprintf(stderr
, "share path %s does not exist\n", fse
->path
);
2287 } else if (!S_ISDIR(stat
.st_mode
)) {
2288 fprintf(stderr
, "share path %s is not a directory \n", fse
->path
);
2292 s
->ctx
.fs_root
= qemu_strdup(fse
->path
);
2293 len
= strlen(conf
->tag
);
2294 if (len
> MAX_TAG_LEN
) {
2297 /* s->tag is non-NULL terminated string */
2298 s
->tag
= qemu_malloc(len
);
2299 memcpy(s
->tag
, conf
->tag
, len
);
2304 s
->vdev
.get_features
= virtio_9p_get_features
;
2305 s
->config_size
= sizeof(struct virtio_9p_config
) +
2307 s
->vdev
.get_config
= virtio_9p_get_config
;