2 * FUSE: Filesystem in Userspace
3 * Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
5 * Implementation of (most of) the low-level FUSE API. The session loop
6 * functions are implemented in separate files.
8 * This program can be distributed under the terms of the GNU LGPLv2.
9 * See the file COPYING.LIB
12 #include "qemu/osdep.h"
14 #include "standard-headers/linux/fuse.h"
15 #include "fuse_misc.h"
17 #include "fuse_virtio.h"
21 #define THREAD_POOL_SIZE 0
23 #define OFFSET_MAX 0x7fffffffffffffffLL
25 struct fuse_pollhandle
{
27 struct fuse_session
*se
;
30 static size_t pagesize
;
32 static __attribute__((constructor
)) void fuse_ll_init_pagesize(void)
34 pagesize
= getpagesize();
37 static void convert_stat(const struct stat
*stbuf
, struct fuse_attr
*attr
)
39 *attr
= (struct fuse_attr
){
41 .mode
= stbuf
->st_mode
,
42 .nlink
= stbuf
->st_nlink
,
45 .rdev
= stbuf
->st_rdev
,
46 .size
= stbuf
->st_size
,
47 .blksize
= stbuf
->st_blksize
,
48 .blocks
= stbuf
->st_blocks
,
49 .atime
= stbuf
->st_atime
,
50 .mtime
= stbuf
->st_mtime
,
51 .ctime
= stbuf
->st_ctime
,
52 .atimensec
= ST_ATIM_NSEC(stbuf
),
53 .mtimensec
= ST_MTIM_NSEC(stbuf
),
54 .ctimensec
= ST_CTIM_NSEC(stbuf
),
58 static void convert_attr(const struct fuse_setattr_in
*attr
, struct stat
*stbuf
)
60 stbuf
->st_mode
= attr
->mode
;
61 stbuf
->st_uid
= attr
->uid
;
62 stbuf
->st_gid
= attr
->gid
;
63 stbuf
->st_size
= attr
->size
;
64 stbuf
->st_atime
= attr
->atime
;
65 stbuf
->st_mtime
= attr
->mtime
;
66 stbuf
->st_ctime
= attr
->ctime
;
67 ST_ATIM_NSEC_SET(stbuf
, attr
->atimensec
);
68 ST_MTIM_NSEC_SET(stbuf
, attr
->mtimensec
);
69 ST_CTIM_NSEC_SET(stbuf
, attr
->ctimensec
);
72 static size_t iov_length(const struct iovec
*iov
, size_t count
)
77 for (seg
= 0; seg
< count
; seg
++) {
78 ret
+= iov
[seg
].iov_len
;
83 static void list_init_req(struct fuse_req
*req
)
89 static void list_del_req(struct fuse_req
*req
)
91 struct fuse_req
*prev
= req
->prev
;
92 struct fuse_req
*next
= req
->next
;
97 static void list_add_req(struct fuse_req
*req
, struct fuse_req
*next
)
99 struct fuse_req
*prev
= next
->prev
;
106 static void destroy_req(fuse_req_t req
)
108 pthread_mutex_destroy(&req
->lock
);
112 void fuse_free_req(fuse_req_t req
)
115 struct fuse_session
*se
= req
->se
;
117 pthread_mutex_lock(&se
->lock
);
118 req
->u
.ni
.func
= NULL
;
119 req
->u
.ni
.data
= NULL
;
123 pthread_mutex_unlock(&se
->lock
);
129 static struct fuse_req
*fuse_ll_alloc_req(struct fuse_session
*se
)
131 struct fuse_req
*req
;
133 req
= g_try_new0(struct fuse_req
, 1);
135 fuse_log(FUSE_LOG_ERR
, "fuse: failed to allocate request\n");
140 fuse_mutex_init(&req
->lock
);
146 /* Send data. If *ch* is NULL, send via session master fd */
147 static int fuse_send_msg(struct fuse_session
*se
, struct fuse_chan
*ch
,
148 struct iovec
*iov
, int count
)
150 struct fuse_out_header
*out
= iov
[0].iov_base
;
152 out
->len
= iov_length(iov
, count
);
153 if (out
->unique
== 0) {
154 fuse_log(FUSE_LOG_DEBUG
, "NOTIFY: code=%d length=%u\n", out
->error
,
156 } else if (out
->error
) {
157 fuse_log(FUSE_LOG_DEBUG
,
158 " unique: %llu, error: %i (%s), outsize: %i\n",
159 (unsigned long long)out
->unique
, out
->error
,
160 strerror(-out
->error
), out
->len
);
162 fuse_log(FUSE_LOG_DEBUG
, " unique: %llu, success, outsize: %i\n",
163 (unsigned long long)out
->unique
, out
->len
);
166 if (fuse_lowlevel_is_virtio(se
)) {
167 return virtio_send_msg(se
, ch
, iov
, count
);
170 abort(); /* virtio should have taken it before here */
175 int fuse_send_reply_iov_nofree(fuse_req_t req
, int error
, struct iovec
*iov
,
178 struct fuse_out_header out
= {
179 .unique
= req
->unique
,
183 if (error
<= -1000 || error
> 0) {
184 fuse_log(FUSE_LOG_ERR
, "fuse: bad error value: %i\n", error
);
188 iov
[0].iov_base
= &out
;
189 iov
[0].iov_len
= sizeof(struct fuse_out_header
);
191 return fuse_send_msg(req
->se
, req
->ch
, iov
, count
);
194 static int send_reply_iov(fuse_req_t req
, int error
, struct iovec
*iov
,
199 res
= fuse_send_reply_iov_nofree(req
, error
, iov
, count
);
204 static int send_reply(fuse_req_t req
, int error
, const void *arg
,
210 iov
[1].iov_base
= (void *)arg
;
211 iov
[1].iov_len
= argsize
;
214 return send_reply_iov(req
, error
, iov
, count
);
217 int fuse_reply_iov(fuse_req_t req
, const struct iovec
*iov
, int count
)
220 g_autofree
struct iovec
*padded_iov
= NULL
;
222 padded_iov
= g_try_new(struct iovec
, count
+ 1);
223 if (padded_iov
== NULL
) {
224 return fuse_reply_err(req
, ENOMEM
);
227 memcpy(padded_iov
+ 1, iov
, count
* sizeof(struct iovec
));
230 res
= send_reply_iov(req
, 0, padded_iov
, count
);
237 * 'buf` is allowed to be empty so that the proper size may be
238 * allocated by the caller
240 size_t fuse_add_direntry(fuse_req_t req
, char *buf
, size_t bufsize
,
241 const char *name
, const struct stat
*stbuf
, off_t off
)
246 size_t entlen_padded
;
247 struct fuse_dirent
*dirent
;
249 namelen
= strlen(name
);
250 entlen
= FUSE_NAME_OFFSET
+ namelen
;
251 entlen_padded
= FUSE_DIRENT_ALIGN(entlen
);
253 if ((buf
== NULL
) || (entlen_padded
> bufsize
)) {
254 return entlen_padded
;
257 dirent
= (struct fuse_dirent
*)buf
;
258 dirent
->ino
= stbuf
->st_ino
;
260 dirent
->namelen
= namelen
;
261 dirent
->type
= (stbuf
->st_mode
& S_IFMT
) >> 12;
262 memcpy(dirent
->name
, name
, namelen
);
263 memset(dirent
->name
+ namelen
, 0, entlen_padded
- entlen
);
265 return entlen_padded
;
268 static void convert_statfs(const struct statvfs
*stbuf
,
269 struct fuse_kstatfs
*kstatfs
)
271 *kstatfs
= (struct fuse_kstatfs
){
272 .bsize
= stbuf
->f_bsize
,
273 .frsize
= stbuf
->f_frsize
,
274 .blocks
= stbuf
->f_blocks
,
275 .bfree
= stbuf
->f_bfree
,
276 .bavail
= stbuf
->f_bavail
,
277 .files
= stbuf
->f_files
,
278 .ffree
= stbuf
->f_ffree
,
279 .namelen
= stbuf
->f_namemax
,
283 static int send_reply_ok(fuse_req_t req
, const void *arg
, size_t argsize
)
285 return send_reply(req
, 0, arg
, argsize
);
288 int fuse_reply_err(fuse_req_t req
, int err
)
290 return send_reply(req
, -err
, NULL
, 0);
293 void fuse_reply_none(fuse_req_t req
)
298 static unsigned long calc_timeout_sec(double t
)
300 if (t
> (double)ULONG_MAX
) {
302 } else if (t
< 0.0) {
305 return (unsigned long)t
;
309 static unsigned int calc_timeout_nsec(double t
)
311 double f
= t
- (double)calc_timeout_sec(t
);
314 } else if (f
>= 0.999999999) {
317 return (unsigned int)(f
* 1.0e9
);
321 static void fill_entry(struct fuse_entry_out
*arg
,
322 const struct fuse_entry_param
*e
)
324 *arg
= (struct fuse_entry_out
){
326 .generation
= e
->generation
,
327 .entry_valid
= calc_timeout_sec(e
->entry_timeout
),
328 .entry_valid_nsec
= calc_timeout_nsec(e
->entry_timeout
),
329 .attr_valid
= calc_timeout_sec(e
->attr_timeout
),
330 .attr_valid_nsec
= calc_timeout_nsec(e
->attr_timeout
),
332 convert_stat(&e
->attr
, &arg
->attr
);
334 arg
->attr
.flags
= e
->attr_flags
;
338 * `buf` is allowed to be empty so that the proper size may be
339 * allocated by the caller
341 size_t fuse_add_direntry_plus(fuse_req_t req
, char *buf
, size_t bufsize
,
343 const struct fuse_entry_param
*e
, off_t off
)
348 size_t entlen_padded
;
350 namelen
= strlen(name
);
351 entlen
= FUSE_NAME_OFFSET_DIRENTPLUS
+ namelen
;
352 entlen_padded
= FUSE_DIRENT_ALIGN(entlen
);
353 if ((buf
== NULL
) || (entlen_padded
> bufsize
)) {
354 return entlen_padded
;
357 struct fuse_direntplus
*dp
= (struct fuse_direntplus
*)buf
;
358 memset(&dp
->entry_out
, 0, sizeof(dp
->entry_out
));
359 fill_entry(&dp
->entry_out
, e
);
361 struct fuse_dirent
*dirent
= &dp
->dirent
;
362 *dirent
= (struct fuse_dirent
){
363 .ino
= e
->attr
.st_ino
,
366 .type
= (e
->attr
.st_mode
& S_IFMT
) >> 12,
368 memcpy(dirent
->name
, name
, namelen
);
369 memset(dirent
->name
+ namelen
, 0, entlen_padded
- entlen
);
371 return entlen_padded
;
374 static void fill_open(struct fuse_open_out
*arg
, const struct fuse_file_info
*f
)
378 arg
->open_flags
|= FOPEN_DIRECT_IO
;
381 arg
->open_flags
|= FOPEN_KEEP_CACHE
;
383 if (f
->cache_readdir
) {
384 arg
->open_flags
|= FOPEN_CACHE_DIR
;
386 if (f
->nonseekable
) {
387 arg
->open_flags
|= FOPEN_NONSEEKABLE
;
391 int fuse_reply_entry(fuse_req_t req
, const struct fuse_entry_param
*e
)
393 struct fuse_entry_out arg
;
394 size_t size
= sizeof(arg
);
396 memset(&arg
, 0, sizeof(arg
));
398 return send_reply_ok(req
, &arg
, size
);
401 int fuse_reply_create(fuse_req_t req
, const struct fuse_entry_param
*e
,
402 const struct fuse_file_info
*f
)
404 char buf
[sizeof(struct fuse_entry_out
) + sizeof(struct fuse_open_out
)];
405 size_t entrysize
= sizeof(struct fuse_entry_out
);
406 struct fuse_entry_out
*earg
= (struct fuse_entry_out
*)buf
;
407 struct fuse_open_out
*oarg
= (struct fuse_open_out
*)(buf
+ entrysize
);
409 memset(buf
, 0, sizeof(buf
));
412 return send_reply_ok(req
, buf
, entrysize
+ sizeof(struct fuse_open_out
));
415 int fuse_reply_attr(fuse_req_t req
, const struct stat
*attr
,
418 struct fuse_attr_out arg
;
419 size_t size
= sizeof(arg
);
421 memset(&arg
, 0, sizeof(arg
));
422 arg
.attr_valid
= calc_timeout_sec(attr_timeout
);
423 arg
.attr_valid_nsec
= calc_timeout_nsec(attr_timeout
);
424 convert_stat(attr
, &arg
.attr
);
426 return send_reply_ok(req
, &arg
, size
);
429 int fuse_reply_readlink(fuse_req_t req
, const char *linkname
)
431 return send_reply_ok(req
, linkname
, strlen(linkname
));
434 int fuse_reply_open(fuse_req_t req
, const struct fuse_file_info
*f
)
436 struct fuse_open_out arg
;
438 memset(&arg
, 0, sizeof(arg
));
440 return send_reply_ok(req
, &arg
, sizeof(arg
));
443 int fuse_reply_write(fuse_req_t req
, size_t count
)
445 struct fuse_write_out arg
;
447 memset(&arg
, 0, sizeof(arg
));
450 return send_reply_ok(req
, &arg
, sizeof(arg
));
453 int fuse_reply_buf(fuse_req_t req
, const char *buf
, size_t size
)
455 return send_reply_ok(req
, buf
, size
);
458 static int fuse_send_data_iov_fallback(struct fuse_session
*se
,
459 struct fuse_chan
*ch
, struct iovec
*iov
,
460 int iov_count
, struct fuse_bufvec
*buf
,
463 /* Optimize common case */
464 if (buf
->count
== 1 && buf
->idx
== 0 && buf
->off
== 0 &&
465 !(buf
->buf
[0].flags
& FUSE_BUF_IS_FD
)) {
467 * FIXME: also avoid memory copy if there are multiple buffers
468 * but none of them contain an fd
471 iov
[iov_count
].iov_base
= buf
->buf
[0].mem
;
472 iov
[iov_count
].iov_len
= len
;
474 return fuse_send_msg(se
, ch
, iov
, iov_count
);
477 if (fuse_lowlevel_is_virtio(se
) && buf
->count
== 1 &&
478 buf
->buf
[0].flags
== (FUSE_BUF_IS_FD
| FUSE_BUF_FD_SEEK
)) {
479 return virtio_send_data_iov(se
, ch
, iov
, iov_count
, buf
, len
);
482 abort(); /* Will have taken vhost path */
486 static int fuse_send_data_iov(struct fuse_session
*se
, struct fuse_chan
*ch
,
487 struct iovec
*iov
, int iov_count
,
488 struct fuse_bufvec
*buf
)
490 size_t len
= fuse_buf_size(buf
);
492 return fuse_send_data_iov_fallback(se
, ch
, iov
, iov_count
, buf
, len
);
495 int fuse_reply_data(fuse_req_t req
, struct fuse_bufvec
*bufv
)
498 struct fuse_out_header out
= {
499 .unique
= req
->unique
,
503 iov
[0].iov_base
= &out
;
504 iov
[0].iov_len
= sizeof(struct fuse_out_header
);
506 res
= fuse_send_data_iov(req
->se
, req
->ch
, iov
, 1, bufv
);
511 return fuse_reply_err(req
, res
);
515 int fuse_reply_statfs(fuse_req_t req
, const struct statvfs
*stbuf
)
517 struct fuse_statfs_out arg
;
518 size_t size
= sizeof(arg
);
520 memset(&arg
, 0, sizeof(arg
));
521 convert_statfs(stbuf
, &arg
.st
);
523 return send_reply_ok(req
, &arg
, size
);
526 int fuse_reply_xattr(fuse_req_t req
, size_t count
)
528 struct fuse_getxattr_out arg
;
530 memset(&arg
, 0, sizeof(arg
));
533 return send_reply_ok(req
, &arg
, sizeof(arg
));
536 int fuse_reply_lock(fuse_req_t req
, const struct flock
*lock
)
538 struct fuse_lk_out arg
;
540 memset(&arg
, 0, sizeof(arg
));
541 arg
.lk
.type
= lock
->l_type
;
542 if (lock
->l_type
!= F_UNLCK
) {
543 arg
.lk
.start
= lock
->l_start
;
544 if (lock
->l_len
== 0) {
545 arg
.lk
.end
= OFFSET_MAX
;
547 arg
.lk
.end
= lock
->l_start
+ lock
->l_len
- 1;
550 arg
.lk
.pid
= lock
->l_pid
;
551 return send_reply_ok(req
, &arg
, sizeof(arg
));
554 int fuse_reply_bmap(fuse_req_t req
, uint64_t idx
)
556 struct fuse_bmap_out arg
;
558 memset(&arg
, 0, sizeof(arg
));
561 return send_reply_ok(req
, &arg
, sizeof(arg
));
564 static struct fuse_ioctl_iovec
*fuse_ioctl_iovec_copy(const struct iovec
*iov
,
567 struct fuse_ioctl_iovec
*fiov
;
570 fiov
= g_try_new(struct fuse_ioctl_iovec
, count
);
575 for (i
= 0; i
< count
; i
++) {
576 fiov
[i
].base
= (uintptr_t)iov
[i
].iov_base
;
577 fiov
[i
].len
= iov
[i
].iov_len
;
583 int fuse_reply_ioctl_retry(fuse_req_t req
, const struct iovec
*in_iov
,
584 size_t in_count
, const struct iovec
*out_iov
,
587 struct fuse_ioctl_out arg
;
588 g_autofree
struct fuse_ioctl_iovec
*in_fiov
= NULL
;
589 g_autofree
struct fuse_ioctl_iovec
*out_fiov
= NULL
;
594 memset(&arg
, 0, sizeof(arg
));
595 arg
.flags
|= FUSE_IOCTL_RETRY
;
596 arg
.in_iovs
= in_count
;
597 arg
.out_iovs
= out_count
;
598 iov
[count
].iov_base
= &arg
;
599 iov
[count
].iov_len
= sizeof(arg
);
602 /* Can't handle non-compat 64bit ioctls on 32bit */
603 if (sizeof(void *) == 4 && req
->ioctl_64bit
) {
604 res
= fuse_reply_err(req
, EINVAL
);
609 in_fiov
= fuse_ioctl_iovec_copy(in_iov
, in_count
);
611 res
= fuse_reply_err(req
, ENOMEM
);
615 iov
[count
].iov_base
= (void *)in_fiov
;
616 iov
[count
].iov_len
= sizeof(in_fiov
[0]) * in_count
;
620 out_fiov
= fuse_ioctl_iovec_copy(out_iov
, out_count
);
622 res
= fuse_reply_err(req
, ENOMEM
);
626 iov
[count
].iov_base
= (void *)out_fiov
;
627 iov
[count
].iov_len
= sizeof(out_fiov
[0]) * out_count
;
631 res
= send_reply_iov(req
, 0, iov
, count
);
636 int fuse_reply_ioctl(fuse_req_t req
, int result
, const void *buf
, size_t size
)
638 struct fuse_ioctl_out arg
;
642 memset(&arg
, 0, sizeof(arg
));
644 iov
[count
].iov_base
= &arg
;
645 iov
[count
].iov_len
= sizeof(arg
);
649 iov
[count
].iov_base
= (char *)buf
;
650 iov
[count
].iov_len
= size
;
654 return send_reply_iov(req
, 0, iov
, count
);
657 int fuse_reply_ioctl_iov(fuse_req_t req
, int result
, const struct iovec
*iov
,
660 g_autofree
struct iovec
*padded_iov
= NULL
;
661 struct fuse_ioctl_out arg
;
664 padded_iov
= g_try_new(struct iovec
, count
+ 2);
665 if (padded_iov
== NULL
) {
666 return fuse_reply_err(req
, ENOMEM
);
669 memset(&arg
, 0, sizeof(arg
));
671 padded_iov
[1].iov_base
= &arg
;
672 padded_iov
[1].iov_len
= sizeof(arg
);
674 memcpy(&padded_iov
[2], iov
, count
* sizeof(struct iovec
));
676 res
= send_reply_iov(req
, 0, padded_iov
, count
+ 2);
681 int fuse_reply_poll(fuse_req_t req
, unsigned revents
)
683 struct fuse_poll_out arg
;
685 memset(&arg
, 0, sizeof(arg
));
686 arg
.revents
= revents
;
688 return send_reply_ok(req
, &arg
, sizeof(arg
));
691 int fuse_reply_lseek(fuse_req_t req
, off_t off
)
693 struct fuse_lseek_out arg
;
695 memset(&arg
, 0, sizeof(arg
));
698 return send_reply_ok(req
, &arg
, sizeof(arg
));
701 static void do_lookup(fuse_req_t req
, fuse_ino_t nodeid
,
702 struct fuse_mbuf_iter
*iter
)
704 const char *name
= fuse_mbuf_iter_advance_str(iter
);
706 fuse_reply_err(req
, EINVAL
);
710 if (req
->se
->op
.lookup
) {
711 req
->se
->op
.lookup(req
, nodeid
, name
);
713 fuse_reply_err(req
, ENOSYS
);
717 static void do_forget(fuse_req_t req
, fuse_ino_t nodeid
,
718 struct fuse_mbuf_iter
*iter
)
720 struct fuse_forget_in
*arg
;
722 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
724 fuse_reply_err(req
, EINVAL
);
728 if (req
->se
->op
.forget
) {
729 req
->se
->op
.forget(req
, nodeid
, arg
->nlookup
);
731 fuse_reply_none(req
);
735 static void do_batch_forget(fuse_req_t req
, fuse_ino_t nodeid
,
736 struct fuse_mbuf_iter
*iter
)
738 struct fuse_batch_forget_in
*arg
;
739 struct fuse_forget_data
*forgets
;
744 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
746 fuse_reply_none(req
);
751 * Prevent integer overflow. The compiler emits the following warning
752 * unless we use the scount local variable:
754 * error: comparison is always false due to limited range of data type
755 * [-Werror=type-limits]
757 * This may be true on 64-bit hosts but we need this check for 32-bit
761 if (scount
> SIZE_MAX
/ sizeof(forgets
[0])) {
762 fuse_reply_none(req
);
766 forgets
= fuse_mbuf_iter_advance(iter
, arg
->count
* sizeof(forgets
[0]));
768 fuse_reply_none(req
);
772 if (req
->se
->op
.forget_multi
) {
773 req
->se
->op
.forget_multi(req
, arg
->count
, forgets
);
774 } else if (req
->se
->op
.forget
) {
777 for (i
= 0; i
< arg
->count
; i
++) {
778 struct fuse_req
*dummy_req
;
780 dummy_req
= fuse_ll_alloc_req(req
->se
);
781 if (dummy_req
== NULL
) {
785 dummy_req
->unique
= req
->unique
;
786 dummy_req
->ctx
= req
->ctx
;
787 dummy_req
->ch
= NULL
;
789 req
->se
->op
.forget(dummy_req
, forgets
[i
].ino
, forgets
[i
].nlookup
);
791 fuse_reply_none(req
);
793 fuse_reply_none(req
);
797 static void do_getattr(fuse_req_t req
, fuse_ino_t nodeid
,
798 struct fuse_mbuf_iter
*iter
)
800 struct fuse_file_info
*fip
= NULL
;
801 struct fuse_file_info fi
;
803 struct fuse_getattr_in
*arg
;
805 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
807 fuse_reply_err(req
, EINVAL
);
811 if (arg
->getattr_flags
& FUSE_GETATTR_FH
) {
812 memset(&fi
, 0, sizeof(fi
));
817 if (req
->se
->op
.getattr
) {
818 req
->se
->op
.getattr(req
, nodeid
, fip
);
820 fuse_reply_err(req
, ENOSYS
);
824 static void do_setattr(fuse_req_t req
, fuse_ino_t nodeid
,
825 struct fuse_mbuf_iter
*iter
)
827 if (req
->se
->op
.setattr
) {
828 struct fuse_setattr_in
*arg
;
829 struct fuse_file_info
*fi
= NULL
;
830 struct fuse_file_info fi_store
;
833 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
835 fuse_reply_err(req
, EINVAL
);
839 memset(&stbuf
, 0, sizeof(stbuf
));
840 convert_attr(arg
, &stbuf
);
841 if (arg
->valid
& FATTR_FH
) {
842 arg
->valid
&= ~FATTR_FH
;
843 memset(&fi_store
, 0, sizeof(fi_store
));
847 arg
->valid
&= FUSE_SET_ATTR_MODE
| FUSE_SET_ATTR_UID
|
848 FUSE_SET_ATTR_GID
| FUSE_SET_ATTR_SIZE
|
849 FUSE_SET_ATTR_ATIME
| FUSE_SET_ATTR_MTIME
|
850 FUSE_SET_ATTR_ATIME_NOW
| FUSE_SET_ATTR_MTIME_NOW
|
851 FUSE_SET_ATTR_CTIME
| FUSE_SET_ATTR_KILL_SUIDGID
;
853 req
->se
->op
.setattr(req
, nodeid
, &stbuf
, arg
->valid
, fi
);
855 fuse_reply_err(req
, ENOSYS
);
859 static void do_access(fuse_req_t req
, fuse_ino_t nodeid
,
860 struct fuse_mbuf_iter
*iter
)
862 struct fuse_access_in
*arg
;
864 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
866 fuse_reply_err(req
, EINVAL
);
870 if (req
->se
->op
.access
) {
871 req
->se
->op
.access(req
, nodeid
, arg
->mask
);
873 fuse_reply_err(req
, ENOSYS
);
877 static void do_readlink(fuse_req_t req
, fuse_ino_t nodeid
,
878 struct fuse_mbuf_iter
*iter
)
882 if (req
->se
->op
.readlink
) {
883 req
->se
->op
.readlink(req
, nodeid
);
885 fuse_reply_err(req
, ENOSYS
);
889 static void do_mknod(fuse_req_t req
, fuse_ino_t nodeid
,
890 struct fuse_mbuf_iter
*iter
)
892 struct fuse_mknod_in
*arg
;
895 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
896 name
= fuse_mbuf_iter_advance_str(iter
);
898 fuse_reply_err(req
, EINVAL
);
902 req
->ctx
.umask
= arg
->umask
;
904 if (req
->se
->op
.mknod
) {
905 req
->se
->op
.mknod(req
, nodeid
, name
, arg
->mode
, arg
->rdev
);
907 fuse_reply_err(req
, ENOSYS
);
911 static void do_mkdir(fuse_req_t req
, fuse_ino_t nodeid
,
912 struct fuse_mbuf_iter
*iter
)
914 struct fuse_mkdir_in
*arg
;
917 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
918 name
= fuse_mbuf_iter_advance_str(iter
);
920 fuse_reply_err(req
, EINVAL
);
924 req
->ctx
.umask
= arg
->umask
;
926 if (req
->se
->op
.mkdir
) {
927 req
->se
->op
.mkdir(req
, nodeid
, name
, arg
->mode
);
929 fuse_reply_err(req
, ENOSYS
);
933 static void do_unlink(fuse_req_t req
, fuse_ino_t nodeid
,
934 struct fuse_mbuf_iter
*iter
)
936 const char *name
= fuse_mbuf_iter_advance_str(iter
);
939 fuse_reply_err(req
, EINVAL
);
943 if (req
->se
->op
.unlink
) {
944 req
->se
->op
.unlink(req
, nodeid
, name
);
946 fuse_reply_err(req
, ENOSYS
);
950 static void do_rmdir(fuse_req_t req
, fuse_ino_t nodeid
,
951 struct fuse_mbuf_iter
*iter
)
953 const char *name
= fuse_mbuf_iter_advance_str(iter
);
956 fuse_reply_err(req
, EINVAL
);
960 if (req
->se
->op
.rmdir
) {
961 req
->se
->op
.rmdir(req
, nodeid
, name
);
963 fuse_reply_err(req
, ENOSYS
);
967 static void do_symlink(fuse_req_t req
, fuse_ino_t nodeid
,
968 struct fuse_mbuf_iter
*iter
)
970 const char *name
= fuse_mbuf_iter_advance_str(iter
);
971 const char *linkname
= fuse_mbuf_iter_advance_str(iter
);
973 if (!name
|| !linkname
) {
974 fuse_reply_err(req
, EINVAL
);
978 if (req
->se
->op
.symlink
) {
979 req
->se
->op
.symlink(req
, linkname
, nodeid
, name
);
981 fuse_reply_err(req
, ENOSYS
);
985 static void do_rename(fuse_req_t req
, fuse_ino_t nodeid
,
986 struct fuse_mbuf_iter
*iter
)
988 struct fuse_rename_in
*arg
;
992 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
993 oldname
= fuse_mbuf_iter_advance_str(iter
);
994 newname
= fuse_mbuf_iter_advance_str(iter
);
995 if (!arg
|| !oldname
|| !newname
) {
996 fuse_reply_err(req
, EINVAL
);
1000 if (req
->se
->op
.rename
) {
1001 req
->se
->op
.rename(req
, nodeid
, oldname
, arg
->newdir
, newname
, 0);
1003 fuse_reply_err(req
, ENOSYS
);
1007 static void do_rename2(fuse_req_t req
, fuse_ino_t nodeid
,
1008 struct fuse_mbuf_iter
*iter
)
1010 struct fuse_rename2_in
*arg
;
1011 const char *oldname
;
1012 const char *newname
;
1014 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1015 oldname
= fuse_mbuf_iter_advance_str(iter
);
1016 newname
= fuse_mbuf_iter_advance_str(iter
);
1017 if (!arg
|| !oldname
|| !newname
) {
1018 fuse_reply_err(req
, EINVAL
);
1022 if (req
->se
->op
.rename
) {
1023 req
->se
->op
.rename(req
, nodeid
, oldname
, arg
->newdir
, newname
,
1026 fuse_reply_err(req
, ENOSYS
);
1030 static void do_link(fuse_req_t req
, fuse_ino_t nodeid
,
1031 struct fuse_mbuf_iter
*iter
)
1033 struct fuse_link_in
*arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1034 const char *name
= fuse_mbuf_iter_advance_str(iter
);
1036 if (!arg
|| !name
) {
1037 fuse_reply_err(req
, EINVAL
);
1041 if (req
->se
->op
.link
) {
1042 req
->se
->op
.link(req
, arg
->oldnodeid
, nodeid
, name
);
1044 fuse_reply_err(req
, ENOSYS
);
1048 static void do_create(fuse_req_t req
, fuse_ino_t nodeid
,
1049 struct fuse_mbuf_iter
*iter
)
1051 if (req
->se
->op
.create
) {
1052 struct fuse_create_in
*arg
;
1053 struct fuse_file_info fi
;
1056 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1057 name
= fuse_mbuf_iter_advance_str(iter
);
1058 if (!arg
|| !name
) {
1059 fuse_reply_err(req
, EINVAL
);
1063 memset(&fi
, 0, sizeof(fi
));
1064 fi
.flags
= arg
->flags
;
1065 fi
.kill_priv
= arg
->open_flags
& FUSE_OPEN_KILL_SUIDGID
;
1067 req
->ctx
.umask
= arg
->umask
;
1069 req
->se
->op
.create(req
, nodeid
, name
, arg
->mode
, &fi
);
1071 fuse_reply_err(req
, ENOSYS
);
1075 static void do_open(fuse_req_t req
, fuse_ino_t nodeid
,
1076 struct fuse_mbuf_iter
*iter
)
1078 struct fuse_open_in
*arg
;
1079 struct fuse_file_info fi
;
1081 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1083 fuse_reply_err(req
, EINVAL
);
1087 /* File creation is handled by do_create() or do_mknod() */
1088 if (arg
->flags
& (O_CREAT
| O_TMPFILE
)) {
1089 fuse_reply_err(req
, EINVAL
);
1093 memset(&fi
, 0, sizeof(fi
));
1094 fi
.flags
= arg
->flags
;
1095 fi
.kill_priv
= arg
->open_flags
& FUSE_OPEN_KILL_SUIDGID
;
1097 if (req
->se
->op
.open
) {
1098 req
->se
->op
.open(req
, nodeid
, &fi
);
1100 fuse_reply_open(req
, &fi
);
1104 static void do_read(fuse_req_t req
, fuse_ino_t nodeid
,
1105 struct fuse_mbuf_iter
*iter
)
1107 if (req
->se
->op
.read
) {
1108 struct fuse_read_in
*arg
;
1109 struct fuse_file_info fi
;
1111 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1113 fuse_reply_err(req
, EINVAL
);
1117 memset(&fi
, 0, sizeof(fi
));
1119 fi
.lock_owner
= arg
->lock_owner
;
1120 fi
.flags
= arg
->flags
;
1121 req
->se
->op
.read(req
, nodeid
, arg
->size
, arg
->offset
, &fi
);
1123 fuse_reply_err(req
, ENOSYS
);
1127 static void do_write(fuse_req_t req
, fuse_ino_t nodeid
,
1128 struct fuse_mbuf_iter
*iter
)
1130 struct fuse_write_in
*arg
;
1131 struct fuse_file_info fi
;
1134 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1136 fuse_reply_err(req
, EINVAL
);
1140 param
= fuse_mbuf_iter_advance(iter
, arg
->size
);
1142 fuse_reply_err(req
, EINVAL
);
1146 memset(&fi
, 0, sizeof(fi
));
1148 fi
.writepage
= (arg
->write_flags
& FUSE_WRITE_CACHE
) != 0;
1149 fi
.kill_priv
= !!(arg
->write_flags
& FUSE_WRITE_KILL_PRIV
);
1151 fi
.lock_owner
= arg
->lock_owner
;
1152 fi
.flags
= arg
->flags
;
1154 if (req
->se
->op
.write
) {
1155 req
->se
->op
.write(req
, nodeid
, param
, arg
->size
, arg
->offset
, &fi
);
1157 fuse_reply_err(req
, ENOSYS
);
1161 static void do_write_buf(fuse_req_t req
, fuse_ino_t nodeid
,
1162 struct fuse_mbuf_iter
*iter
, struct fuse_bufvec
*ibufv
)
1164 struct fuse_session
*se
= req
->se
;
1165 struct fuse_bufvec
*pbufv
= ibufv
;
1166 struct fuse_bufvec tmpbufv
= {
1167 .buf
[0] = ibufv
->buf
[0],
1170 struct fuse_write_in
*arg
;
1171 size_t arg_size
= sizeof(*arg
);
1172 struct fuse_file_info fi
;
1174 memset(&fi
, 0, sizeof(fi
));
1176 arg
= fuse_mbuf_iter_advance(iter
, arg_size
);
1178 fuse_reply_err(req
, EINVAL
);
1182 fi
.lock_owner
= arg
->lock_owner
;
1183 fi
.flags
= arg
->flags
;
1185 fi
.writepage
= !!(arg
->write_flags
& FUSE_WRITE_CACHE
);
1186 fi
.kill_priv
= !!(arg
->write_flags
& FUSE_WRITE_KILL_PRIV
);
1188 if (ibufv
->count
== 1) {
1189 assert(!(tmpbufv
.buf
[0].flags
& FUSE_BUF_IS_FD
));
1190 tmpbufv
.buf
[0].mem
= ((char *)arg
) + arg_size
;
1191 tmpbufv
.buf
[0].size
-= sizeof(struct fuse_in_header
) + arg_size
;
1195 * Input bufv contains the headers in the first element
1196 * and the data in the rest, we need to skip that first element
1198 ibufv
->buf
[0].size
= 0;
1201 if (fuse_buf_size(pbufv
) != arg
->size
) {
1202 fuse_log(FUSE_LOG_ERR
,
1203 "fuse: do_write_buf: buffer size doesn't match arg->size\n");
1204 fuse_reply_err(req
, EIO
);
1208 se
->op
.write_buf(req
, nodeid
, pbufv
, arg
->offset
, &fi
);
1211 static void do_flush(fuse_req_t req
, fuse_ino_t nodeid
,
1212 struct fuse_mbuf_iter
*iter
)
1214 struct fuse_flush_in
*arg
;
1215 struct fuse_file_info fi
;
1217 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1219 fuse_reply_err(req
, EINVAL
);
1223 memset(&fi
, 0, sizeof(fi
));
1226 fi
.lock_owner
= arg
->lock_owner
;
1228 if (req
->se
->op
.flush
) {
1229 req
->se
->op
.flush(req
, nodeid
, &fi
);
1231 fuse_reply_err(req
, ENOSYS
);
1235 static void do_release(fuse_req_t req
, fuse_ino_t nodeid
,
1236 struct fuse_mbuf_iter
*iter
)
1238 struct fuse_release_in
*arg
;
1239 struct fuse_file_info fi
;
1241 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1243 fuse_reply_err(req
, EINVAL
);
1247 memset(&fi
, 0, sizeof(fi
));
1248 fi
.flags
= arg
->flags
;
1250 fi
.flush
= (arg
->release_flags
& FUSE_RELEASE_FLUSH
) ? 1 : 0;
1251 fi
.lock_owner
= arg
->lock_owner
;
1253 if (arg
->release_flags
& FUSE_RELEASE_FLOCK_UNLOCK
) {
1254 fi
.flock_release
= 1;
1257 if (req
->se
->op
.release
) {
1258 req
->se
->op
.release(req
, nodeid
, &fi
);
1260 fuse_reply_err(req
, 0);
1264 static void do_fsync(fuse_req_t req
, fuse_ino_t nodeid
,
1265 struct fuse_mbuf_iter
*iter
)
1267 struct fuse_fsync_in
*arg
;
1268 struct fuse_file_info fi
;
1271 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1273 fuse_reply_err(req
, EINVAL
);
1276 datasync
= arg
->fsync_flags
& 1;
1278 memset(&fi
, 0, sizeof(fi
));
1281 if (req
->se
->op
.fsync
) {
1282 if (fi
.fh
== (uint64_t)-1) {
1283 req
->se
->op
.fsync(req
, nodeid
, datasync
, NULL
);
1285 req
->se
->op
.fsync(req
, nodeid
, datasync
, &fi
);
1288 fuse_reply_err(req
, ENOSYS
);
1292 static void do_opendir(fuse_req_t req
, fuse_ino_t nodeid
,
1293 struct fuse_mbuf_iter
*iter
)
1295 struct fuse_open_in
*arg
;
1296 struct fuse_file_info fi
;
1298 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1300 fuse_reply_err(req
, EINVAL
);
1304 memset(&fi
, 0, sizeof(fi
));
1305 fi
.flags
= arg
->flags
;
1307 if (req
->se
->op
.opendir
) {
1308 req
->se
->op
.opendir(req
, nodeid
, &fi
);
1310 fuse_reply_open(req
, &fi
);
1314 static void do_readdir(fuse_req_t req
, fuse_ino_t nodeid
,
1315 struct fuse_mbuf_iter
*iter
)
1317 struct fuse_read_in
*arg
;
1318 struct fuse_file_info fi
;
1320 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1322 fuse_reply_err(req
, EINVAL
);
1326 memset(&fi
, 0, sizeof(fi
));
1329 if (req
->se
->op
.readdir
) {
1330 req
->se
->op
.readdir(req
, nodeid
, arg
->size
, arg
->offset
, &fi
);
1332 fuse_reply_err(req
, ENOSYS
);
1336 static void do_readdirplus(fuse_req_t req
, fuse_ino_t nodeid
,
1337 struct fuse_mbuf_iter
*iter
)
1339 struct fuse_read_in
*arg
;
1340 struct fuse_file_info fi
;
1342 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1344 fuse_reply_err(req
, EINVAL
);
1348 memset(&fi
, 0, sizeof(fi
));
1351 if (req
->se
->op
.readdirplus
) {
1352 req
->se
->op
.readdirplus(req
, nodeid
, arg
->size
, arg
->offset
, &fi
);
1354 fuse_reply_err(req
, ENOSYS
);
1358 static void do_releasedir(fuse_req_t req
, fuse_ino_t nodeid
,
1359 struct fuse_mbuf_iter
*iter
)
1361 struct fuse_release_in
*arg
;
1362 struct fuse_file_info fi
;
1364 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1366 fuse_reply_err(req
, EINVAL
);
1370 memset(&fi
, 0, sizeof(fi
));
1371 fi
.flags
= arg
->flags
;
1374 if (req
->se
->op
.releasedir
) {
1375 req
->se
->op
.releasedir(req
, nodeid
, &fi
);
1377 fuse_reply_err(req
, 0);
1381 static void do_fsyncdir(fuse_req_t req
, fuse_ino_t nodeid
,
1382 struct fuse_mbuf_iter
*iter
)
1384 struct fuse_fsync_in
*arg
;
1385 struct fuse_file_info fi
;
1388 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1390 fuse_reply_err(req
, EINVAL
);
1393 datasync
= arg
->fsync_flags
& 1;
1395 memset(&fi
, 0, sizeof(fi
));
1398 if (req
->se
->op
.fsyncdir
) {
1399 req
->se
->op
.fsyncdir(req
, nodeid
, datasync
, &fi
);
1401 fuse_reply_err(req
, ENOSYS
);
1405 static void do_statfs(fuse_req_t req
, fuse_ino_t nodeid
,
1406 struct fuse_mbuf_iter
*iter
)
1411 if (req
->se
->op
.statfs
) {
1412 req
->se
->op
.statfs(req
, nodeid
);
1414 struct statvfs buf
= {
1418 fuse_reply_statfs(req
, &buf
);
1422 static void do_setxattr(fuse_req_t req
, fuse_ino_t nodeid
,
1423 struct fuse_mbuf_iter
*iter
)
1425 struct fuse_setxattr_in
*arg
;
1428 bool setxattr_ext
= req
->se
->conn
.want
& FUSE_CAP_SETXATTR_EXT
;
1431 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1433 arg
= fuse_mbuf_iter_advance(iter
, FUSE_COMPAT_SETXATTR_IN_SIZE
);
1435 name
= fuse_mbuf_iter_advance_str(iter
);
1436 if (!arg
|| !name
) {
1437 fuse_reply_err(req
, EINVAL
);
1441 value
= fuse_mbuf_iter_advance(iter
, arg
->size
);
1443 fuse_reply_err(req
, EINVAL
);
1447 if (req
->se
->op
.setxattr
) {
1448 uint32_t setxattr_flags
= setxattr_ext
? arg
->setxattr_flags
: 0;
1449 req
->se
->op
.setxattr(req
, nodeid
, name
, value
, arg
->size
, arg
->flags
,
1452 fuse_reply_err(req
, ENOSYS
);
1456 static void do_getxattr(fuse_req_t req
, fuse_ino_t nodeid
,
1457 struct fuse_mbuf_iter
*iter
)
1459 struct fuse_getxattr_in
*arg
;
1462 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1463 name
= fuse_mbuf_iter_advance_str(iter
);
1464 if (!arg
|| !name
) {
1465 fuse_reply_err(req
, EINVAL
);
1469 if (req
->se
->op
.getxattr
) {
1470 req
->se
->op
.getxattr(req
, nodeid
, name
, arg
->size
);
1472 fuse_reply_err(req
, ENOSYS
);
1476 static void do_listxattr(fuse_req_t req
, fuse_ino_t nodeid
,
1477 struct fuse_mbuf_iter
*iter
)
1479 struct fuse_getxattr_in
*arg
;
1481 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1483 fuse_reply_err(req
, EINVAL
);
1487 if (req
->se
->op
.listxattr
) {
1488 req
->se
->op
.listxattr(req
, nodeid
, arg
->size
);
1490 fuse_reply_err(req
, ENOSYS
);
1494 static void do_removexattr(fuse_req_t req
, fuse_ino_t nodeid
,
1495 struct fuse_mbuf_iter
*iter
)
1497 const char *name
= fuse_mbuf_iter_advance_str(iter
);
1500 fuse_reply_err(req
, EINVAL
);
1504 if (req
->se
->op
.removexattr
) {
1505 req
->se
->op
.removexattr(req
, nodeid
, name
);
1507 fuse_reply_err(req
, ENOSYS
);
1511 static void convert_fuse_file_lock(struct fuse_file_lock
*fl
,
1512 struct flock
*flock
)
1514 memset(flock
, 0, sizeof(struct flock
));
1515 flock
->l_type
= fl
->type
;
1516 flock
->l_whence
= SEEK_SET
;
1517 flock
->l_start
= fl
->start
;
1518 if (fl
->end
== OFFSET_MAX
) {
1521 flock
->l_len
= fl
->end
- fl
->start
+ 1;
1523 flock
->l_pid
= fl
->pid
;
1526 static void do_getlk(fuse_req_t req
, fuse_ino_t nodeid
,
1527 struct fuse_mbuf_iter
*iter
)
1529 struct fuse_lk_in
*arg
;
1530 struct fuse_file_info fi
;
1533 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1535 fuse_reply_err(req
, EINVAL
);
1539 memset(&fi
, 0, sizeof(fi
));
1541 fi
.lock_owner
= arg
->owner
;
1543 convert_fuse_file_lock(&arg
->lk
, &flock
);
1544 if (req
->se
->op
.getlk
) {
1545 req
->se
->op
.getlk(req
, nodeid
, &fi
, &flock
);
1547 fuse_reply_err(req
, ENOSYS
);
1551 static void do_setlk_common(fuse_req_t req
, fuse_ino_t nodeid
,
1552 struct fuse_mbuf_iter
*iter
, int sleep
)
1554 struct fuse_lk_in
*arg
;
1555 struct fuse_file_info fi
;
1558 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1560 fuse_reply_err(req
, EINVAL
);
1564 memset(&fi
, 0, sizeof(fi
));
1566 fi
.lock_owner
= arg
->owner
;
1568 if (arg
->lk_flags
& FUSE_LK_FLOCK
) {
1571 switch (arg
->lk
.type
) {
1586 if (req
->se
->op
.flock
) {
1587 req
->se
->op
.flock(req
, nodeid
, &fi
, op
);
1589 fuse_reply_err(req
, ENOSYS
);
1592 convert_fuse_file_lock(&arg
->lk
, &flock
);
1593 if (req
->se
->op
.setlk
) {
1594 req
->se
->op
.setlk(req
, nodeid
, &fi
, &flock
, sleep
);
1596 fuse_reply_err(req
, ENOSYS
);
1601 static void do_setlk(fuse_req_t req
, fuse_ino_t nodeid
,
1602 struct fuse_mbuf_iter
*iter
)
1604 do_setlk_common(req
, nodeid
, iter
, 0);
1607 static void do_setlkw(fuse_req_t req
, fuse_ino_t nodeid
,
1608 struct fuse_mbuf_iter
*iter
)
1610 do_setlk_common(req
, nodeid
, iter
, 1);
1613 static int find_interrupted(struct fuse_session
*se
, struct fuse_req
*req
)
1615 struct fuse_req
*curr
;
1617 for (curr
= se
->list
.next
; curr
!= &se
->list
; curr
= curr
->next
) {
1618 if (curr
->unique
== req
->u
.i
.unique
) {
1619 fuse_interrupt_func_t func
;
1623 pthread_mutex_unlock(&se
->lock
);
1625 /* Ugh, ugly locking */
1626 pthread_mutex_lock(&curr
->lock
);
1627 pthread_mutex_lock(&se
->lock
);
1628 curr
->interrupted
= 1;
1629 func
= curr
->u
.ni
.func
;
1630 data
= curr
->u
.ni
.data
;
1631 pthread_mutex_unlock(&se
->lock
);
1635 pthread_mutex_unlock(&curr
->lock
);
1637 pthread_mutex_lock(&se
->lock
);
1646 for (curr
= se
->interrupts
.next
; curr
!= &se
->interrupts
;
1647 curr
= curr
->next
) {
1648 if (curr
->u
.i
.unique
== req
->u
.i
.unique
) {
1655 static void do_interrupt(fuse_req_t req
, fuse_ino_t nodeid
,
1656 struct fuse_mbuf_iter
*iter
)
1658 struct fuse_interrupt_in
*arg
;
1659 struct fuse_session
*se
= req
->se
;
1663 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1665 fuse_reply_err(req
, EINVAL
);
1669 fuse_log(FUSE_LOG_DEBUG
, "INTERRUPT: %llu\n",
1670 (unsigned long long)arg
->unique
);
1672 req
->u
.i
.unique
= arg
->unique
;
1674 pthread_mutex_lock(&se
->lock
);
1675 if (find_interrupted(se
, req
)) {
1678 list_add_req(req
, &se
->interrupts
);
1680 pthread_mutex_unlock(&se
->lock
);
1683 static struct fuse_req
*check_interrupt(struct fuse_session
*se
,
1684 struct fuse_req
*req
)
1686 struct fuse_req
*curr
;
1688 for (curr
= se
->interrupts
.next
; curr
!= &se
->interrupts
;
1689 curr
= curr
->next
) {
1690 if (curr
->u
.i
.unique
== req
->unique
) {
1691 req
->interrupted
= 1;
1697 curr
= se
->interrupts
.next
;
1698 if (curr
!= &se
->interrupts
) {
1700 list_init_req(curr
);
1707 static void do_bmap(fuse_req_t req
, fuse_ino_t nodeid
,
1708 struct fuse_mbuf_iter
*iter
)
1710 struct fuse_bmap_in
*arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1713 fuse_reply_err(req
, EINVAL
);
1717 if (req
->se
->op
.bmap
) {
1718 req
->se
->op
.bmap(req
, nodeid
, arg
->blocksize
, arg
->block
);
1720 fuse_reply_err(req
, ENOSYS
);
1724 static void do_ioctl(fuse_req_t req
, fuse_ino_t nodeid
,
1725 struct fuse_mbuf_iter
*iter
)
1727 struct fuse_ioctl_in
*arg
;
1729 void *in_buf
= NULL
;
1730 struct fuse_file_info fi
;
1732 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1734 fuse_reply_err(req
, EINVAL
);
1739 if (flags
& FUSE_IOCTL_DIR
&& !(req
->se
->conn
.want
& FUSE_CAP_IOCTL_DIR
)) {
1740 fuse_reply_err(req
, ENOTTY
);
1745 in_buf
= fuse_mbuf_iter_advance(iter
, arg
->in_size
);
1747 fuse_reply_err(req
, EINVAL
);
1752 memset(&fi
, 0, sizeof(fi
));
1755 if (sizeof(void *) == 4 && !(flags
& FUSE_IOCTL_32BIT
)) {
1756 req
->ioctl_64bit
= 1;
1759 if (req
->se
->op
.ioctl
) {
1760 req
->se
->op
.ioctl(req
, nodeid
, arg
->cmd
, (void *)(uintptr_t)arg
->arg
,
1761 &fi
, flags
, in_buf
, arg
->in_size
, arg
->out_size
);
1763 fuse_reply_err(req
, ENOSYS
);
1767 void fuse_pollhandle_destroy(struct fuse_pollhandle
*ph
)
1772 static void do_poll(fuse_req_t req
, fuse_ino_t nodeid
,
1773 struct fuse_mbuf_iter
*iter
)
1775 struct fuse_poll_in
*arg
;
1776 struct fuse_file_info fi
;
1778 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1780 fuse_reply_err(req
, EINVAL
);
1784 memset(&fi
, 0, sizeof(fi
));
1786 fi
.poll_events
= arg
->events
;
1788 if (req
->se
->op
.poll
) {
1789 struct fuse_pollhandle
*ph
= NULL
;
1791 if (arg
->flags
& FUSE_POLL_SCHEDULE_NOTIFY
) {
1792 ph
= malloc(sizeof(struct fuse_pollhandle
));
1794 fuse_reply_err(req
, ENOMEM
);
1801 req
->se
->op
.poll(req
, nodeid
, &fi
, ph
);
1803 fuse_reply_err(req
, ENOSYS
);
1807 static void do_fallocate(fuse_req_t req
, fuse_ino_t nodeid
,
1808 struct fuse_mbuf_iter
*iter
)
1810 struct fuse_fallocate_in
*arg
;
1811 struct fuse_file_info fi
;
1813 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1815 fuse_reply_err(req
, EINVAL
);
1819 memset(&fi
, 0, sizeof(fi
));
1822 if (req
->se
->op
.fallocate
) {
1823 req
->se
->op
.fallocate(req
, nodeid
, arg
->mode
, arg
->offset
, arg
->length
,
1826 fuse_reply_err(req
, ENOSYS
);
1830 static void do_copy_file_range(fuse_req_t req
, fuse_ino_t nodeid_in
,
1831 struct fuse_mbuf_iter
*iter
)
1833 struct fuse_copy_file_range_in
*arg
;
1834 struct fuse_file_info fi_in
, fi_out
;
1836 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1838 fuse_reply_err(req
, EINVAL
);
1842 memset(&fi_in
, 0, sizeof(fi_in
));
1843 fi_in
.fh
= arg
->fh_in
;
1845 memset(&fi_out
, 0, sizeof(fi_out
));
1846 fi_out
.fh
= arg
->fh_out
;
1849 if (req
->se
->op
.copy_file_range
) {
1850 req
->se
->op
.copy_file_range(req
, nodeid_in
, arg
->off_in
, &fi_in
,
1851 arg
->nodeid_out
, arg
->off_out
, &fi_out
,
1852 arg
->len
, arg
->flags
);
1854 fuse_reply_err(req
, ENOSYS
);
1858 static void do_lseek(fuse_req_t req
, fuse_ino_t nodeid
,
1859 struct fuse_mbuf_iter
*iter
)
1861 struct fuse_lseek_in
*arg
;
1862 struct fuse_file_info fi
;
1864 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1866 fuse_reply_err(req
, EINVAL
);
1869 memset(&fi
, 0, sizeof(fi
));
1872 if (req
->se
->op
.lseek
) {
1873 req
->se
->op
.lseek(req
, nodeid
, arg
->offset
, arg
->whence
, &fi
);
1875 fuse_reply_err(req
, ENOSYS
);
1879 static void do_init(fuse_req_t req
, fuse_ino_t nodeid
,
1880 struct fuse_mbuf_iter
*iter
)
1882 size_t compat_size
= offsetof(struct fuse_init_in
, max_readahead
);
1883 struct fuse_init_in
*arg
;
1884 struct fuse_init_out outarg
;
1885 struct fuse_session
*se
= req
->se
;
1886 size_t bufsize
= se
->bufsize
;
1887 size_t outargsize
= sizeof(outarg
);
1891 /* First consume the old fields... */
1892 arg
= fuse_mbuf_iter_advance(iter
, compat_size
);
1894 fuse_reply_err(req
, EINVAL
);
1898 /* ...and now consume the new fields. */
1899 if (arg
->major
== 7 && arg
->minor
>= 6) {
1900 if (!fuse_mbuf_iter_advance(iter
, sizeof(*arg
) - compat_size
)) {
1901 fuse_reply_err(req
, EINVAL
);
1906 fuse_log(FUSE_LOG_DEBUG
, "INIT: %u.%u\n", arg
->major
, arg
->minor
);
1907 if (arg
->major
== 7 && arg
->minor
>= 6) {
1908 fuse_log(FUSE_LOG_DEBUG
, "flags=0x%08x\n", arg
->flags
);
1909 fuse_log(FUSE_LOG_DEBUG
, "max_readahead=0x%08x\n", arg
->max_readahead
);
1911 se
->conn
.proto_major
= arg
->major
;
1912 se
->conn
.proto_minor
= arg
->minor
;
1913 se
->conn
.capable
= 0;
1916 memset(&outarg
, 0, sizeof(outarg
));
1917 outarg
.major
= FUSE_KERNEL_VERSION
;
1918 outarg
.minor
= FUSE_KERNEL_MINOR_VERSION
;
1920 if (arg
->major
< 7 || (arg
->major
== 7 && arg
->minor
< 31)) {
1921 fuse_log(FUSE_LOG_ERR
, "fuse: unsupported protocol version: %u.%u\n",
1922 arg
->major
, arg
->minor
);
1923 fuse_reply_err(req
, EPROTO
);
1927 if (arg
->major
> 7) {
1928 /* Wait for a second INIT request with a 7.X version */
1929 send_reply_ok(req
, &outarg
, sizeof(outarg
));
1933 if (arg
->max_readahead
< se
->conn
.max_readahead
) {
1934 se
->conn
.max_readahead
= arg
->max_readahead
;
1936 if (arg
->flags
& FUSE_ASYNC_READ
) {
1937 se
->conn
.capable
|= FUSE_CAP_ASYNC_READ
;
1939 if (arg
->flags
& FUSE_POSIX_LOCKS
) {
1940 se
->conn
.capable
|= FUSE_CAP_POSIX_LOCKS
;
1942 if (arg
->flags
& FUSE_ATOMIC_O_TRUNC
) {
1943 se
->conn
.capable
|= FUSE_CAP_ATOMIC_O_TRUNC
;
1945 if (arg
->flags
& FUSE_EXPORT_SUPPORT
) {
1946 se
->conn
.capable
|= FUSE_CAP_EXPORT_SUPPORT
;
1948 if (arg
->flags
& FUSE_DONT_MASK
) {
1949 se
->conn
.capable
|= FUSE_CAP_DONT_MASK
;
1951 if (arg
->flags
& FUSE_FLOCK_LOCKS
) {
1952 se
->conn
.capable
|= FUSE_CAP_FLOCK_LOCKS
;
1954 if (arg
->flags
& FUSE_AUTO_INVAL_DATA
) {
1955 se
->conn
.capable
|= FUSE_CAP_AUTO_INVAL_DATA
;
1957 if (arg
->flags
& FUSE_DO_READDIRPLUS
) {
1958 se
->conn
.capable
|= FUSE_CAP_READDIRPLUS
;
1960 if (arg
->flags
& FUSE_READDIRPLUS_AUTO
) {
1961 se
->conn
.capable
|= FUSE_CAP_READDIRPLUS_AUTO
;
1963 if (arg
->flags
& FUSE_ASYNC_DIO
) {
1964 se
->conn
.capable
|= FUSE_CAP_ASYNC_DIO
;
1966 if (arg
->flags
& FUSE_WRITEBACK_CACHE
) {
1967 se
->conn
.capable
|= FUSE_CAP_WRITEBACK_CACHE
;
1969 if (arg
->flags
& FUSE_NO_OPEN_SUPPORT
) {
1970 se
->conn
.capable
|= FUSE_CAP_NO_OPEN_SUPPORT
;
1972 if (arg
->flags
& FUSE_PARALLEL_DIROPS
) {
1973 se
->conn
.capable
|= FUSE_CAP_PARALLEL_DIROPS
;
1975 if (arg
->flags
& FUSE_POSIX_ACL
) {
1976 se
->conn
.capable
|= FUSE_CAP_POSIX_ACL
;
1978 if (arg
->flags
& FUSE_HANDLE_KILLPRIV
) {
1979 se
->conn
.capable
|= FUSE_CAP_HANDLE_KILLPRIV
;
1981 if (arg
->flags
& FUSE_NO_OPENDIR_SUPPORT
) {
1982 se
->conn
.capable
|= FUSE_CAP_NO_OPENDIR_SUPPORT
;
1984 if (!(arg
->flags
& FUSE_MAX_PAGES
)) {
1985 size_t max_bufsize
= FUSE_DEFAULT_MAX_PAGES_PER_REQ
* getpagesize() +
1986 FUSE_BUFFER_HEADER_SIZE
;
1987 if (bufsize
> max_bufsize
) {
1988 bufsize
= max_bufsize
;
1991 if (arg
->flags
& FUSE_SUBMOUNTS
) {
1992 se
->conn
.capable
|= FUSE_CAP_SUBMOUNTS
;
1994 if (arg
->flags
& FUSE_HANDLE_KILLPRIV_V2
) {
1995 se
->conn
.capable
|= FUSE_CAP_HANDLE_KILLPRIV_V2
;
1997 if (arg
->flags
& FUSE_SETXATTR_EXT
) {
1998 se
->conn
.capable
|= FUSE_CAP_SETXATTR_EXT
;
2001 #ifdef HAVE_VMSPLICE
2002 se
->conn
.capable
|= FUSE_CAP_SPLICE_WRITE
| FUSE_CAP_SPLICE_MOVE
;
2004 se
->conn
.capable
|= FUSE_CAP_SPLICE_READ
;
2006 se
->conn
.capable
|= FUSE_CAP_IOCTL_DIR
;
2009 * Default settings for modern filesystems.
2011 * Most of these capabilities were disabled by default in
2012 * libfuse2 for backwards compatibility reasons. In libfuse3,
2013 * we can finally enable them by default (as long as they're
2014 * supported by the kernel).
2016 #define LL_SET_DEFAULT(cond, cap) \
2017 if ((cond) && (se->conn.capable & (cap))) \
2018 se->conn.want |= (cap)
2019 LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ
);
2020 LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS
);
2021 LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA
);
2022 LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV
);
2023 LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO
);
2024 LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR
);
2025 LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC
);
2026 LL_SET_DEFAULT(se
->op
.write_buf
, FUSE_CAP_SPLICE_READ
);
2027 LL_SET_DEFAULT(se
->op
.getlk
&& se
->op
.setlk
, FUSE_CAP_POSIX_LOCKS
);
2028 LL_SET_DEFAULT(se
->op
.flock
, FUSE_CAP_FLOCK_LOCKS
);
2029 LL_SET_DEFAULT(se
->op
.readdirplus
, FUSE_CAP_READDIRPLUS
);
2030 LL_SET_DEFAULT(se
->op
.readdirplus
&& se
->op
.readdir
,
2031 FUSE_CAP_READDIRPLUS_AUTO
);
2032 se
->conn
.time_gran
= 1;
2034 if (bufsize
< FUSE_MIN_READ_BUFFER
) {
2035 fuse_log(FUSE_LOG_ERR
, "fuse: warning: buffer size too small: %zu\n",
2037 bufsize
= FUSE_MIN_READ_BUFFER
;
2039 se
->bufsize
= bufsize
;
2041 if (se
->conn
.max_write
> bufsize
- FUSE_BUFFER_HEADER_SIZE
) {
2042 se
->conn
.max_write
= bufsize
- FUSE_BUFFER_HEADER_SIZE
;
2046 se
->got_destroy
= 0;
2048 se
->op
.init(se
->userdata
, &se
->conn
);
2051 if (se
->conn
.want
& (~se
->conn
.capable
)) {
2052 fuse_log(FUSE_LOG_ERR
,
2053 "fuse: error: filesystem requested capabilities "
2054 "0x%x that are not supported by kernel, aborting.\n",
2055 se
->conn
.want
& (~se
->conn
.capable
));
2056 fuse_reply_err(req
, EPROTO
);
2057 se
->error
= -EPROTO
;
2058 fuse_session_exit(se
);
2062 if (se
->conn
.max_write
< bufsize
- FUSE_BUFFER_HEADER_SIZE
) {
2063 se
->bufsize
= se
->conn
.max_write
+ FUSE_BUFFER_HEADER_SIZE
;
2065 if (arg
->flags
& FUSE_MAX_PAGES
) {
2066 outarg
.flags
|= FUSE_MAX_PAGES
;
2067 outarg
.max_pages
= (se
->conn
.max_write
- 1) / getpagesize() + 1;
2071 * Always enable big writes, this is superseded
2072 * by the max_write option
2074 outarg
.flags
|= FUSE_BIG_WRITES
;
2076 if (se
->conn
.want
& FUSE_CAP_ASYNC_READ
) {
2077 outarg
.flags
|= FUSE_ASYNC_READ
;
2079 if (se
->conn
.want
& FUSE_CAP_PARALLEL_DIROPS
) {
2080 outarg
.flags
|= FUSE_PARALLEL_DIROPS
;
2082 if (se
->conn
.want
& FUSE_CAP_POSIX_LOCKS
) {
2083 outarg
.flags
|= FUSE_POSIX_LOCKS
;
2085 if (se
->conn
.want
& FUSE_CAP_ATOMIC_O_TRUNC
) {
2086 outarg
.flags
|= FUSE_ATOMIC_O_TRUNC
;
2088 if (se
->conn
.want
& FUSE_CAP_EXPORT_SUPPORT
) {
2089 outarg
.flags
|= FUSE_EXPORT_SUPPORT
;
2091 if (se
->conn
.want
& FUSE_CAP_DONT_MASK
) {
2092 outarg
.flags
|= FUSE_DONT_MASK
;
2094 if (se
->conn
.want
& FUSE_CAP_FLOCK_LOCKS
) {
2095 outarg
.flags
|= FUSE_FLOCK_LOCKS
;
2097 if (se
->conn
.want
& FUSE_CAP_AUTO_INVAL_DATA
) {
2098 outarg
.flags
|= FUSE_AUTO_INVAL_DATA
;
2100 if (se
->conn
.want
& FUSE_CAP_READDIRPLUS
) {
2101 outarg
.flags
|= FUSE_DO_READDIRPLUS
;
2103 if (se
->conn
.want
& FUSE_CAP_READDIRPLUS_AUTO
) {
2104 outarg
.flags
|= FUSE_READDIRPLUS_AUTO
;
2106 if (se
->conn
.want
& FUSE_CAP_ASYNC_DIO
) {
2107 outarg
.flags
|= FUSE_ASYNC_DIO
;
2109 if (se
->conn
.want
& FUSE_CAP_WRITEBACK_CACHE
) {
2110 outarg
.flags
|= FUSE_WRITEBACK_CACHE
;
2112 if (se
->conn
.want
& FUSE_CAP_POSIX_ACL
) {
2113 outarg
.flags
|= FUSE_POSIX_ACL
;
2115 outarg
.max_readahead
= se
->conn
.max_readahead
;
2116 outarg
.max_write
= se
->conn
.max_write
;
2117 if (se
->conn
.max_background
>= (1 << 16)) {
2118 se
->conn
.max_background
= (1 << 16) - 1;
2120 if (se
->conn
.congestion_threshold
> se
->conn
.max_background
) {
2121 se
->conn
.congestion_threshold
= se
->conn
.max_background
;
2123 if (!se
->conn
.congestion_threshold
) {
2124 se
->conn
.congestion_threshold
= se
->conn
.max_background
* 3 / 4;
2127 outarg
.max_background
= se
->conn
.max_background
;
2128 outarg
.congestion_threshold
= se
->conn
.congestion_threshold
;
2129 outarg
.time_gran
= se
->conn
.time_gran
;
2131 if (se
->conn
.want
& FUSE_CAP_HANDLE_KILLPRIV_V2
) {
2132 outarg
.flags
|= FUSE_HANDLE_KILLPRIV_V2
;
2135 if (se
->conn
.want
& FUSE_CAP_SETXATTR_EXT
) {
2136 outarg
.flags
|= FUSE_SETXATTR_EXT
;
2139 fuse_log(FUSE_LOG_DEBUG
, " INIT: %u.%u\n", outarg
.major
, outarg
.minor
);
2140 fuse_log(FUSE_LOG_DEBUG
, " flags=0x%08x\n", outarg
.flags
);
2141 fuse_log(FUSE_LOG_DEBUG
, " max_readahead=0x%08x\n", outarg
.max_readahead
);
2142 fuse_log(FUSE_LOG_DEBUG
, " max_write=0x%08x\n", outarg
.max_write
);
2143 fuse_log(FUSE_LOG_DEBUG
, " max_background=%i\n", outarg
.max_background
);
2144 fuse_log(FUSE_LOG_DEBUG
, " congestion_threshold=%i\n",
2145 outarg
.congestion_threshold
);
2146 fuse_log(FUSE_LOG_DEBUG
, " time_gran=%u\n", outarg
.time_gran
);
2148 send_reply_ok(req
, &outarg
, outargsize
);
2151 static void do_destroy(fuse_req_t req
, fuse_ino_t nodeid
,
2152 struct fuse_mbuf_iter
*iter
)
2154 struct fuse_session
*se
= req
->se
;
2159 se
->got_destroy
= 1;
2161 if (se
->op
.destroy
) {
2162 se
->op
.destroy(se
->userdata
);
2165 send_reply_ok(req
, NULL
, 0);
2168 int fuse_lowlevel_notify_store(struct fuse_session
*se
, fuse_ino_t ino
,
2169 off_t offset
, struct fuse_bufvec
*bufv
)
2171 struct fuse_out_header out
= {
2172 .error
= FUSE_NOTIFY_STORE
,
2174 struct fuse_notify_store_out outarg
= {
2177 .size
= fuse_buf_size(bufv
),
2179 struct iovec iov
[3];
2186 iov
[0].iov_base
= &out
;
2187 iov
[0].iov_len
= sizeof(out
);
2188 iov
[1].iov_base
= &outarg
;
2189 iov
[1].iov_len
= sizeof(outarg
);
2191 res
= fuse_send_data_iov(se
, NULL
, iov
, 2, bufv
);
2199 void *fuse_req_userdata(fuse_req_t req
)
2201 return req
->se
->userdata
;
2204 const struct fuse_ctx
*fuse_req_ctx(fuse_req_t req
)
2209 void fuse_req_interrupt_func(fuse_req_t req
, fuse_interrupt_func_t func
,
2212 pthread_mutex_lock(&req
->lock
);
2213 pthread_mutex_lock(&req
->se
->lock
);
2214 req
->u
.ni
.func
= func
;
2215 req
->u
.ni
.data
= data
;
2216 pthread_mutex_unlock(&req
->se
->lock
);
2217 if (req
->interrupted
&& func
) {
2220 pthread_mutex_unlock(&req
->lock
);
2223 int fuse_req_interrupted(fuse_req_t req
)
2227 pthread_mutex_lock(&req
->se
->lock
);
2228 interrupted
= req
->interrupted
;
2229 pthread_mutex_unlock(&req
->se
->lock
);
2235 void (*func
)(fuse_req_t
, fuse_ino_t
, struct fuse_mbuf_iter
*);
2238 [FUSE_LOOKUP
] = { do_lookup
, "LOOKUP" },
2239 [FUSE_FORGET
] = { do_forget
, "FORGET" },
2240 [FUSE_GETATTR
] = { do_getattr
, "GETATTR" },
2241 [FUSE_SETATTR
] = { do_setattr
, "SETATTR" },
2242 [FUSE_READLINK
] = { do_readlink
, "READLINK" },
2243 [FUSE_SYMLINK
] = { do_symlink
, "SYMLINK" },
2244 [FUSE_MKNOD
] = { do_mknod
, "MKNOD" },
2245 [FUSE_MKDIR
] = { do_mkdir
, "MKDIR" },
2246 [FUSE_UNLINK
] = { do_unlink
, "UNLINK" },
2247 [FUSE_RMDIR
] = { do_rmdir
, "RMDIR" },
2248 [FUSE_RENAME
] = { do_rename
, "RENAME" },
2249 [FUSE_LINK
] = { do_link
, "LINK" },
2250 [FUSE_OPEN
] = { do_open
, "OPEN" },
2251 [FUSE_READ
] = { do_read
, "READ" },
2252 [FUSE_WRITE
] = { do_write
, "WRITE" },
2253 [FUSE_STATFS
] = { do_statfs
, "STATFS" },
2254 [FUSE_RELEASE
] = { do_release
, "RELEASE" },
2255 [FUSE_FSYNC
] = { do_fsync
, "FSYNC" },
2256 [FUSE_SETXATTR
] = { do_setxattr
, "SETXATTR" },
2257 [FUSE_GETXATTR
] = { do_getxattr
, "GETXATTR" },
2258 [FUSE_LISTXATTR
] = { do_listxattr
, "LISTXATTR" },
2259 [FUSE_REMOVEXATTR
] = { do_removexattr
, "REMOVEXATTR" },
2260 [FUSE_FLUSH
] = { do_flush
, "FLUSH" },
2261 [FUSE_INIT
] = { do_init
, "INIT" },
2262 [FUSE_OPENDIR
] = { do_opendir
, "OPENDIR" },
2263 [FUSE_READDIR
] = { do_readdir
, "READDIR" },
2264 [FUSE_RELEASEDIR
] = { do_releasedir
, "RELEASEDIR" },
2265 [FUSE_FSYNCDIR
] = { do_fsyncdir
, "FSYNCDIR" },
2266 [FUSE_GETLK
] = { do_getlk
, "GETLK" },
2267 [FUSE_SETLK
] = { do_setlk
, "SETLK" },
2268 [FUSE_SETLKW
] = { do_setlkw
, "SETLKW" },
2269 [FUSE_ACCESS
] = { do_access
, "ACCESS" },
2270 [FUSE_CREATE
] = { do_create
, "CREATE" },
2271 [FUSE_INTERRUPT
] = { do_interrupt
, "INTERRUPT" },
2272 [FUSE_BMAP
] = { do_bmap
, "BMAP" },
2273 [FUSE_IOCTL
] = { do_ioctl
, "IOCTL" },
2274 [FUSE_POLL
] = { do_poll
, "POLL" },
2275 [FUSE_FALLOCATE
] = { do_fallocate
, "FALLOCATE" },
2276 [FUSE_DESTROY
] = { do_destroy
, "DESTROY" },
2277 [FUSE_NOTIFY_REPLY
] = { NULL
, "NOTIFY_REPLY" },
2278 [FUSE_BATCH_FORGET
] = { do_batch_forget
, "BATCH_FORGET" },
2279 [FUSE_READDIRPLUS
] = { do_readdirplus
, "READDIRPLUS" },
2280 [FUSE_RENAME2
] = { do_rename2
, "RENAME2" },
2281 [FUSE_COPY_FILE_RANGE
] = { do_copy_file_range
, "COPY_FILE_RANGE" },
2282 [FUSE_LSEEK
] = { do_lseek
, "LSEEK" },
2285 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
2287 static const char *opname(enum fuse_opcode opcode
)
2289 if (opcode
>= FUSE_MAXOP
|| !fuse_ll_ops
[opcode
].name
) {
2292 return fuse_ll_ops
[opcode
].name
;
2296 void fuse_session_process_buf(struct fuse_session
*se
,
2297 const struct fuse_buf
*buf
)
2299 struct fuse_bufvec bufv
= { .buf
[0] = *buf
, .count
= 1 };
2300 fuse_session_process_buf_int(se
, &bufv
, NULL
);
2305 * bufv is normally a single entry buffer, except for a write
2306 * where (if it's in memory) then the bufv may be multiple entries,
2307 * where the first entry contains all headers and subsequent entries
2309 * bufv shall not use any offsets etc to make the data anything
2310 * other than contiguous starting from 0.
2312 void fuse_session_process_buf_int(struct fuse_session
*se
,
2313 struct fuse_bufvec
*bufv
,
2314 struct fuse_chan
*ch
)
2316 const struct fuse_buf
*buf
= bufv
->buf
;
2317 struct fuse_mbuf_iter iter
= FUSE_MBUF_ITER_INIT(buf
);
2318 struct fuse_in_header
*in
;
2319 struct fuse_req
*req
;
2322 /* The first buffer must be a memory buffer */
2323 assert(!(buf
->flags
& FUSE_BUF_IS_FD
));
2325 in
= fuse_mbuf_iter_advance(&iter
, sizeof(*in
));
2326 assert(in
); /* caller guarantees the input buffer is large enough */
2330 "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
2331 (unsigned long long)in
->unique
, opname((enum fuse_opcode
)in
->opcode
),
2332 in
->opcode
, (unsigned long long)in
->nodeid
, buf
->size
, in
->pid
);
2334 req
= fuse_ll_alloc_req(se
);
2336 struct fuse_out_header out
= {
2337 .unique
= in
->unique
,
2340 struct iovec iov
= {
2342 .iov_len
= sizeof(struct fuse_out_header
),
2345 fuse_send_msg(se
, ch
, &iov
, 1);
2349 req
->unique
= in
->unique
;
2350 req
->ctx
.uid
= in
->uid
;
2351 req
->ctx
.gid
= in
->gid
;
2352 req
->ctx
.pid
= in
->pid
;
2356 * INIT and DESTROY requests are serialized, all other request types
2357 * run in parallel. This prevents races between FUSE_INIT and ordinary
2358 * requests, FUSE_INIT and FUSE_INIT, FUSE_INIT and FUSE_DESTROY, and
2359 * FUSE_DESTROY and FUSE_DESTROY.
2361 if (in
->opcode
== FUSE_INIT
|| in
->opcode
== CUSE_INIT
||
2362 in
->opcode
== FUSE_DESTROY
) {
2363 pthread_rwlock_wrlock(&se
->init_rwlock
);
2365 pthread_rwlock_rdlock(&se
->init_rwlock
);
2369 if (!se
->got_init
) {
2370 enum fuse_opcode expected
;
2372 expected
= se
->cuse_data
? CUSE_INIT
: FUSE_INIT
;
2373 if (in
->opcode
!= expected
) {
2376 } else if (in
->opcode
== FUSE_INIT
|| in
->opcode
== CUSE_INIT
) {
2377 if (fuse_lowlevel_is_virtio(se
)) {
2379 * TODO: This is after a hard reboot typically, we need to do
2380 * a destroy, but we can't reply to this request yet so
2381 * we can't use do_destroy
2383 fuse_log(FUSE_LOG_DEBUG
, "%s: reinit\n", __func__
);
2384 se
->got_destroy
= 1;
2386 if (se
->op
.destroy
) {
2387 se
->op
.destroy(se
->userdata
);
2395 /* Implement -o allow_root */
2396 if (se
->deny_others
&& in
->uid
!= se
->owner
&& in
->uid
!= 0 &&
2397 in
->opcode
!= FUSE_INIT
&& in
->opcode
!= FUSE_READ
&&
2398 in
->opcode
!= FUSE_WRITE
&& in
->opcode
!= FUSE_FSYNC
&&
2399 in
->opcode
!= FUSE_RELEASE
&& in
->opcode
!= FUSE_READDIR
&&
2400 in
->opcode
!= FUSE_FSYNCDIR
&& in
->opcode
!= FUSE_RELEASEDIR
&&
2401 in
->opcode
!= FUSE_NOTIFY_REPLY
&& in
->opcode
!= FUSE_READDIRPLUS
) {
2406 if (in
->opcode
>= FUSE_MAXOP
|| !fuse_ll_ops
[in
->opcode
].func
) {
2409 if (in
->opcode
!= FUSE_INTERRUPT
) {
2410 struct fuse_req
*intr
;
2411 pthread_mutex_lock(&se
->lock
);
2412 intr
= check_interrupt(se
, req
);
2413 list_add_req(req
, &se
->list
);
2414 pthread_mutex_unlock(&se
->lock
);
2416 fuse_reply_err(intr
, EAGAIN
);
2420 if (in
->opcode
== FUSE_WRITE
&& se
->op
.write_buf
) {
2421 do_write_buf(req
, in
->nodeid
, &iter
, bufv
);
2423 fuse_ll_ops
[in
->opcode
].func(req
, in
->nodeid
, &iter
);
2426 pthread_rwlock_unlock(&se
->init_rwlock
);
2430 fuse_reply_err(req
, err
);
2431 pthread_rwlock_unlock(&se
->init_rwlock
);
2434 #define LL_OPTION(n, o, v) \
2436 n, offsetof(struct fuse_session, o), v \
2439 static const struct fuse_opt fuse_ll_opts
[] = {
2440 LL_OPTION("debug", debug
, 1),
2441 LL_OPTION("-d", debug
, 1),
2442 LL_OPTION("--debug", debug
, 1),
2443 LL_OPTION("allow_root", deny_others
, 1),
2444 LL_OPTION("--socket-path=%s", vu_socket_path
, 0),
2445 LL_OPTION("--socket-group=%s", vu_socket_group
, 0),
2446 LL_OPTION("--fd=%d", vu_listen_fd
, 0),
2447 LL_OPTION("--thread-pool-size=%d", thread_pool_size
, 0),
2451 void fuse_lowlevel_version(void)
2453 printf("using FUSE kernel interface version %i.%i\n", FUSE_KERNEL_VERSION
,
2454 FUSE_KERNEL_MINOR_VERSION
);
2457 void fuse_lowlevel_help(void)
2460 * These are not all options, but the ones that are
2461 * potentially of interest to an end-user
2464 " -o allow_root allow access by root\n"
2465 " --socket-path=PATH path for the vhost-user socket\n"
2466 " --socket-group=GRNAME name of group for the vhost-user socket\n"
2467 " --fd=FDNUM fd number of vhost-user socket\n"
2468 " --thread-pool-size=NUM thread pool size limit (default %d)\n",
2472 void fuse_session_destroy(struct fuse_session
*se
)
2474 if (se
->got_init
&& !se
->got_destroy
) {
2475 if (se
->op
.destroy
) {
2476 se
->op
.destroy(se
->userdata
);
2479 pthread_rwlock_destroy(&se
->init_rwlock
);
2480 pthread_mutex_destroy(&se
->lock
);
2481 free(se
->cuse_data
);
2486 if (fuse_lowlevel_is_virtio(se
)) {
2487 virtio_session_close(se
);
2490 free(se
->vu_socket_path
);
2491 se
->vu_socket_path
= NULL
;
2497 struct fuse_session
*fuse_session_new(struct fuse_args
*args
,
2498 const struct fuse_lowlevel_ops
*op
,
2499 size_t op_size
, void *userdata
)
2501 struct fuse_session
*se
;
2503 if (sizeof(struct fuse_lowlevel_ops
) < op_size
) {
2506 "fuse: warning: library too old, some operations may not work\n");
2507 op_size
= sizeof(struct fuse_lowlevel_ops
);
2510 if (args
->argc
== 0) {
2511 fuse_log(FUSE_LOG_ERR
,
2512 "fuse: empty argv passed to fuse_session_new().\n");
2516 se
= g_try_new0(struct fuse_session
, 1);
2518 fuse_log(FUSE_LOG_ERR
, "fuse: failed to allocate fuse object\n");
2522 se
->vu_listen_fd
= -1;
2523 se
->thread_pool_size
= THREAD_POOL_SIZE
;
2524 se
->conn
.max_write
= UINT_MAX
;
2525 se
->conn
.max_readahead
= UINT_MAX
;
2528 if (fuse_opt_parse(args
, se
, fuse_ll_opts
, NULL
) == -1) {
2531 if (args
->argc
== 1 && args
->argv
[0][0] == '-') {
2532 fuse_log(FUSE_LOG_ERR
,
2533 "fuse: warning: argv[0] looks like an option, but "
2534 "will be ignored\n");
2535 } else if (args
->argc
!= 1) {
2537 fuse_log(FUSE_LOG_ERR
, "fuse: unknown option(s): `");
2538 for (i
= 1; i
< args
->argc
- 1; i
++) {
2539 fuse_log(FUSE_LOG_ERR
, "%s ", args
->argv
[i
]);
2541 fuse_log(FUSE_LOG_ERR
, "%s'\n", args
->argv
[i
]);
2545 if (!se
->vu_socket_path
&& se
->vu_listen_fd
< 0) {
2546 fuse_log(FUSE_LOG_ERR
, "fuse: missing --socket-path or --fd option\n");
2549 if (se
->vu_socket_path
&& se
->vu_listen_fd
>= 0) {
2550 fuse_log(FUSE_LOG_ERR
,
2551 "fuse: --socket-path and --fd cannot be given together\n");
2554 if (se
->vu_socket_group
&& !se
->vu_socket_path
) {
2555 fuse_log(FUSE_LOG_ERR
,
2556 "fuse: --socket-group can only be used with --socket-path\n");
2560 se
->bufsize
= FUSE_MAX_MAX_PAGES
* getpagesize() + FUSE_BUFFER_HEADER_SIZE
;
2562 list_init_req(&se
->list
);
2563 list_init_req(&se
->interrupts
);
2564 fuse_mutex_init(&se
->lock
);
2565 pthread_rwlock_init(&se
->init_rwlock
, NULL
);
2567 memcpy(&se
->op
, op
, op_size
);
2568 se
->owner
= getuid();
2569 se
->userdata
= userdata
;
2574 fuse_opt_free_args(args
);
2581 int fuse_session_mount(struct fuse_session
*se
)
2583 return virtio_session_mount(se
);
2586 int fuse_session_fd(struct fuse_session
*se
)
2591 void fuse_session_unmount(struct fuse_session
*se
)
2595 int fuse_lowlevel_is_virtio(struct fuse_session
*se
)
2597 return !!se
->virtio_dev
;
2600 void fuse_session_exit(struct fuse_session
*se
)
2605 void fuse_session_reset(struct fuse_session
*se
)
2611 int fuse_session_exited(struct fuse_session
*se
)