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"
31 #define OFFSET_MAX 0x7fffffffffffffffLL
33 struct fuse_pollhandle
{
35 struct fuse_session
*se
;
38 static size_t pagesize
;
40 static __attribute__((constructor
)) void fuse_ll_init_pagesize(void)
42 pagesize
= getpagesize();
45 static void convert_stat(const struct stat
*stbuf
, struct fuse_attr
*attr
)
47 *attr
= (struct fuse_attr
){
49 .mode
= stbuf
->st_mode
,
50 .nlink
= stbuf
->st_nlink
,
53 .rdev
= stbuf
->st_rdev
,
54 .size
= stbuf
->st_size
,
55 .blksize
= stbuf
->st_blksize
,
56 .blocks
= stbuf
->st_blocks
,
57 .atime
= stbuf
->st_atime
,
58 .mtime
= stbuf
->st_mtime
,
59 .ctime
= stbuf
->st_ctime
,
60 .atimensec
= ST_ATIM_NSEC(stbuf
),
61 .mtimensec
= ST_MTIM_NSEC(stbuf
),
62 .ctimensec
= ST_CTIM_NSEC(stbuf
),
66 static void convert_attr(const struct fuse_setattr_in
*attr
, struct stat
*stbuf
)
68 stbuf
->st_mode
= attr
->mode
;
69 stbuf
->st_uid
= attr
->uid
;
70 stbuf
->st_gid
= attr
->gid
;
71 stbuf
->st_size
= attr
->size
;
72 stbuf
->st_atime
= attr
->atime
;
73 stbuf
->st_mtime
= attr
->mtime
;
74 stbuf
->st_ctime
= attr
->ctime
;
75 ST_ATIM_NSEC_SET(stbuf
, attr
->atimensec
);
76 ST_MTIM_NSEC_SET(stbuf
, attr
->mtimensec
);
77 ST_CTIM_NSEC_SET(stbuf
, attr
->ctimensec
);
80 static size_t iov_length(const struct iovec
*iov
, size_t count
)
85 for (seg
= 0; seg
< count
; seg
++) {
86 ret
+= iov
[seg
].iov_len
;
91 static void list_init_req(struct fuse_req
*req
)
97 static void list_del_req(struct fuse_req
*req
)
99 struct fuse_req
*prev
= req
->prev
;
100 struct fuse_req
*next
= req
->next
;
105 static void list_add_req(struct fuse_req
*req
, struct fuse_req
*next
)
107 struct fuse_req
*prev
= next
->prev
;
114 static void destroy_req(fuse_req_t req
)
116 pthread_mutex_destroy(&req
->lock
);
120 void fuse_free_req(fuse_req_t req
)
123 struct fuse_session
*se
= req
->se
;
125 pthread_mutex_lock(&se
->lock
);
126 req
->u
.ni
.func
= NULL
;
127 req
->u
.ni
.data
= NULL
;
131 pthread_mutex_unlock(&se
->lock
);
137 static struct fuse_req
*fuse_ll_alloc_req(struct fuse_session
*se
)
139 struct fuse_req
*req
;
141 req
= (struct fuse_req
*)calloc(1, sizeof(struct fuse_req
));
143 fuse_log(FUSE_LOG_ERR
, "fuse: failed to allocate request\n");
148 fuse_mutex_init(&req
->lock
);
154 /* Send data. If *ch* is NULL, send via session master fd */
155 static int fuse_send_msg(struct fuse_session
*se
, struct fuse_chan
*ch
,
156 struct iovec
*iov
, int count
)
158 struct fuse_out_header
*out
= iov
[0].iov_base
;
160 out
->len
= iov_length(iov
, count
);
161 if (out
->unique
== 0) {
162 fuse_log(FUSE_LOG_DEBUG
, "NOTIFY: code=%d length=%u\n", out
->error
,
164 } else if (out
->error
) {
165 fuse_log(FUSE_LOG_DEBUG
,
166 " unique: %llu, error: %i (%s), outsize: %i\n",
167 (unsigned long long)out
->unique
, out
->error
,
168 strerror(-out
->error
), out
->len
);
170 fuse_log(FUSE_LOG_DEBUG
, " unique: %llu, success, outsize: %i\n",
171 (unsigned long long)out
->unique
, out
->len
);
174 if (fuse_lowlevel_is_virtio(se
)) {
175 return virtio_send_msg(se
, ch
, iov
, count
);
178 abort(); /* virtio should have taken it before here */
183 int fuse_send_reply_iov_nofree(fuse_req_t req
, int error
, struct iovec
*iov
,
186 struct fuse_out_header out
= {
187 .unique
= req
->unique
,
191 if (error
<= -1000 || error
> 0) {
192 fuse_log(FUSE_LOG_ERR
, "fuse: bad error value: %i\n", error
);
196 iov
[0].iov_base
= &out
;
197 iov
[0].iov_len
= sizeof(struct fuse_out_header
);
199 return fuse_send_msg(req
->se
, req
->ch
, iov
, count
);
202 static int send_reply_iov(fuse_req_t req
, int error
, struct iovec
*iov
,
207 res
= fuse_send_reply_iov_nofree(req
, error
, iov
, count
);
212 static int send_reply(fuse_req_t req
, int error
, const void *arg
,
218 iov
[1].iov_base
= (void *)arg
;
219 iov
[1].iov_len
= argsize
;
222 return send_reply_iov(req
, error
, iov
, count
);
225 int fuse_reply_iov(fuse_req_t req
, const struct iovec
*iov
, int count
)
228 struct iovec
*padded_iov
;
230 padded_iov
= malloc((count
+ 1) * sizeof(struct iovec
));
231 if (padded_iov
== NULL
) {
232 return fuse_reply_err(req
, ENOMEM
);
235 memcpy(padded_iov
+ 1, iov
, count
* sizeof(struct iovec
));
238 res
= send_reply_iov(req
, 0, padded_iov
, count
);
246 * 'buf` is allowed to be empty so that the proper size may be
247 * allocated by the caller
249 size_t fuse_add_direntry(fuse_req_t req
, char *buf
, size_t bufsize
,
250 const char *name
, const struct stat
*stbuf
, off_t off
)
255 size_t entlen_padded
;
256 struct fuse_dirent
*dirent
;
258 namelen
= strlen(name
);
259 entlen
= FUSE_NAME_OFFSET
+ namelen
;
260 entlen_padded
= FUSE_DIRENT_ALIGN(entlen
);
262 if ((buf
== NULL
) || (entlen_padded
> bufsize
)) {
263 return entlen_padded
;
266 dirent
= (struct fuse_dirent
*)buf
;
267 dirent
->ino
= stbuf
->st_ino
;
269 dirent
->namelen
= namelen
;
270 dirent
->type
= (stbuf
->st_mode
& S_IFMT
) >> 12;
271 memcpy(dirent
->name
, name
, namelen
);
272 memset(dirent
->name
+ namelen
, 0, entlen_padded
- entlen
);
274 return entlen_padded
;
277 static void convert_statfs(const struct statvfs
*stbuf
,
278 struct fuse_kstatfs
*kstatfs
)
280 *kstatfs
= (struct fuse_kstatfs
){
281 .bsize
= stbuf
->f_bsize
,
282 .frsize
= stbuf
->f_frsize
,
283 .blocks
= stbuf
->f_blocks
,
284 .bfree
= stbuf
->f_bfree
,
285 .bavail
= stbuf
->f_bavail
,
286 .files
= stbuf
->f_files
,
287 .ffree
= stbuf
->f_ffree
,
288 .namelen
= stbuf
->f_namemax
,
292 static int send_reply_ok(fuse_req_t req
, const void *arg
, size_t argsize
)
294 return send_reply(req
, 0, arg
, argsize
);
297 int fuse_reply_err(fuse_req_t req
, int err
)
299 return send_reply(req
, -err
, NULL
, 0);
302 void fuse_reply_none(fuse_req_t req
)
307 static unsigned long calc_timeout_sec(double t
)
309 if (t
> (double)ULONG_MAX
) {
311 } else if (t
< 0.0) {
314 return (unsigned long)t
;
318 static unsigned int calc_timeout_nsec(double t
)
320 double f
= t
- (double)calc_timeout_sec(t
);
323 } else if (f
>= 0.999999999) {
326 return (unsigned int)(f
* 1.0e9
);
330 static void fill_entry(struct fuse_entry_out
*arg
,
331 const struct fuse_entry_param
*e
)
333 *arg
= (struct fuse_entry_out
){
335 .generation
= e
->generation
,
336 .entry_valid
= calc_timeout_sec(e
->entry_timeout
),
337 .entry_valid_nsec
= calc_timeout_nsec(e
->entry_timeout
),
338 .attr_valid
= calc_timeout_sec(e
->attr_timeout
),
339 .attr_valid_nsec
= calc_timeout_nsec(e
->attr_timeout
),
341 convert_stat(&e
->attr
, &arg
->attr
);
345 * `buf` is allowed to be empty so that the proper size may be
346 * allocated by the caller
348 size_t fuse_add_direntry_plus(fuse_req_t req
, char *buf
, size_t bufsize
,
350 const struct fuse_entry_param
*e
, off_t off
)
355 size_t entlen_padded
;
357 namelen
= strlen(name
);
358 entlen
= FUSE_NAME_OFFSET_DIRENTPLUS
+ namelen
;
359 entlen_padded
= FUSE_DIRENT_ALIGN(entlen
);
360 if ((buf
== NULL
) || (entlen_padded
> bufsize
)) {
361 return entlen_padded
;
364 struct fuse_direntplus
*dp
= (struct fuse_direntplus
*)buf
;
365 memset(&dp
->entry_out
, 0, sizeof(dp
->entry_out
));
366 fill_entry(&dp
->entry_out
, e
);
368 struct fuse_dirent
*dirent
= &dp
->dirent
;
369 *dirent
= (struct fuse_dirent
){
370 .ino
= e
->attr
.st_ino
,
373 .type
= (e
->attr
.st_mode
& S_IFMT
) >> 12,
375 memcpy(dirent
->name
, name
, namelen
);
376 memset(dirent
->name
+ namelen
, 0, entlen_padded
- entlen
);
378 return entlen_padded
;
381 static void fill_open(struct fuse_open_out
*arg
, const struct fuse_file_info
*f
)
385 arg
->open_flags
|= FOPEN_DIRECT_IO
;
388 arg
->open_flags
|= FOPEN_KEEP_CACHE
;
390 if (f
->cache_readdir
) {
391 arg
->open_flags
|= FOPEN_CACHE_DIR
;
393 if (f
->nonseekable
) {
394 arg
->open_flags
|= FOPEN_NONSEEKABLE
;
398 int fuse_reply_entry(fuse_req_t req
, const struct fuse_entry_param
*e
)
400 struct fuse_entry_out arg
;
401 size_t size
= sizeof(arg
);
403 memset(&arg
, 0, sizeof(arg
));
405 return send_reply_ok(req
, &arg
, size
);
408 int fuse_reply_create(fuse_req_t req
, const struct fuse_entry_param
*e
,
409 const struct fuse_file_info
*f
)
411 char buf
[sizeof(struct fuse_entry_out
) + sizeof(struct fuse_open_out
)];
412 size_t entrysize
= sizeof(struct fuse_entry_out
);
413 struct fuse_entry_out
*earg
= (struct fuse_entry_out
*)buf
;
414 struct fuse_open_out
*oarg
= (struct fuse_open_out
*)(buf
+ entrysize
);
416 memset(buf
, 0, sizeof(buf
));
419 return send_reply_ok(req
, buf
, entrysize
+ sizeof(struct fuse_open_out
));
422 int fuse_reply_attr(fuse_req_t req
, const struct stat
*attr
,
425 struct fuse_attr_out arg
;
426 size_t size
= sizeof(arg
);
428 memset(&arg
, 0, sizeof(arg
));
429 arg
.attr_valid
= calc_timeout_sec(attr_timeout
);
430 arg
.attr_valid_nsec
= calc_timeout_nsec(attr_timeout
);
431 convert_stat(attr
, &arg
.attr
);
433 return send_reply_ok(req
, &arg
, size
);
436 int fuse_reply_readlink(fuse_req_t req
, const char *linkname
)
438 return send_reply_ok(req
, linkname
, strlen(linkname
));
441 int fuse_reply_open(fuse_req_t req
, const struct fuse_file_info
*f
)
443 struct fuse_open_out arg
;
445 memset(&arg
, 0, sizeof(arg
));
447 return send_reply_ok(req
, &arg
, sizeof(arg
));
450 int fuse_reply_write(fuse_req_t req
, size_t count
)
452 struct fuse_write_out arg
;
454 memset(&arg
, 0, sizeof(arg
));
457 return send_reply_ok(req
, &arg
, sizeof(arg
));
460 int fuse_reply_buf(fuse_req_t req
, const char *buf
, size_t size
)
462 return send_reply_ok(req
, buf
, size
);
465 static int fuse_send_data_iov_fallback(struct fuse_session
*se
,
466 struct fuse_chan
*ch
, struct iovec
*iov
,
467 int iov_count
, struct fuse_bufvec
*buf
,
470 /* Optimize common case */
471 if (buf
->count
== 1 && buf
->idx
== 0 && buf
->off
== 0 &&
472 !(buf
->buf
[0].flags
& FUSE_BUF_IS_FD
)) {
474 * FIXME: also avoid memory copy if there are multiple buffers
475 * but none of them contain an fd
478 iov
[iov_count
].iov_base
= buf
->buf
[0].mem
;
479 iov
[iov_count
].iov_len
= len
;
481 return fuse_send_msg(se
, ch
, iov
, iov_count
);
484 if (fuse_lowlevel_is_virtio(se
) && buf
->count
== 1 &&
485 buf
->buf
[0].flags
== (FUSE_BUF_IS_FD
| FUSE_BUF_FD_SEEK
)) {
486 return virtio_send_data_iov(se
, ch
, iov
, iov_count
, buf
, len
);
489 abort(); /* Will have taken vhost path */
493 static int fuse_send_data_iov(struct fuse_session
*se
, struct fuse_chan
*ch
,
494 struct iovec
*iov
, int iov_count
,
495 struct fuse_bufvec
*buf
)
497 size_t len
= fuse_buf_size(buf
);
499 return fuse_send_data_iov_fallback(se
, ch
, iov
, iov_count
, buf
, len
);
502 int fuse_reply_data(fuse_req_t req
, struct fuse_bufvec
*bufv
)
505 struct fuse_out_header out
= {
506 .unique
= req
->unique
,
510 iov
[0].iov_base
= &out
;
511 iov
[0].iov_len
= sizeof(struct fuse_out_header
);
513 res
= fuse_send_data_iov(req
->se
, req
->ch
, iov
, 1, bufv
);
518 return fuse_reply_err(req
, res
);
522 int fuse_reply_statfs(fuse_req_t req
, const struct statvfs
*stbuf
)
524 struct fuse_statfs_out arg
;
525 size_t size
= sizeof(arg
);
527 memset(&arg
, 0, sizeof(arg
));
528 convert_statfs(stbuf
, &arg
.st
);
530 return send_reply_ok(req
, &arg
, size
);
533 int fuse_reply_xattr(fuse_req_t req
, size_t count
)
535 struct fuse_getxattr_out arg
;
537 memset(&arg
, 0, sizeof(arg
));
540 return send_reply_ok(req
, &arg
, sizeof(arg
));
543 int fuse_reply_lock(fuse_req_t req
, const struct flock
*lock
)
545 struct fuse_lk_out arg
;
547 memset(&arg
, 0, sizeof(arg
));
548 arg
.lk
.type
= lock
->l_type
;
549 if (lock
->l_type
!= F_UNLCK
) {
550 arg
.lk
.start
= lock
->l_start
;
551 if (lock
->l_len
== 0) {
552 arg
.lk
.end
= OFFSET_MAX
;
554 arg
.lk
.end
= lock
->l_start
+ lock
->l_len
- 1;
557 arg
.lk
.pid
= lock
->l_pid
;
558 return send_reply_ok(req
, &arg
, sizeof(arg
));
561 int fuse_reply_bmap(fuse_req_t req
, uint64_t idx
)
563 struct fuse_bmap_out arg
;
565 memset(&arg
, 0, sizeof(arg
));
568 return send_reply_ok(req
, &arg
, sizeof(arg
));
571 static struct fuse_ioctl_iovec
*fuse_ioctl_iovec_copy(const struct iovec
*iov
,
574 struct fuse_ioctl_iovec
*fiov
;
577 fiov
= malloc(sizeof(fiov
[0]) * count
);
582 for (i
= 0; i
< count
; i
++) {
583 fiov
[i
].base
= (uintptr_t)iov
[i
].iov_base
;
584 fiov
[i
].len
= iov
[i
].iov_len
;
590 int fuse_reply_ioctl_retry(fuse_req_t req
, const struct iovec
*in_iov
,
591 size_t in_count
, const struct iovec
*out_iov
,
594 struct fuse_ioctl_out arg
;
595 struct fuse_ioctl_iovec
*in_fiov
= NULL
;
596 struct fuse_ioctl_iovec
*out_fiov
= NULL
;
601 memset(&arg
, 0, sizeof(arg
));
602 arg
.flags
|= FUSE_IOCTL_RETRY
;
603 arg
.in_iovs
= in_count
;
604 arg
.out_iovs
= out_count
;
605 iov
[count
].iov_base
= &arg
;
606 iov
[count
].iov_len
= sizeof(arg
);
609 /* Can't handle non-compat 64bit ioctls on 32bit */
610 if (sizeof(void *) == 4 && req
->ioctl_64bit
) {
611 res
= fuse_reply_err(req
, EINVAL
);
616 in_fiov
= fuse_ioctl_iovec_copy(in_iov
, in_count
);
621 iov
[count
].iov_base
= (void *)in_fiov
;
622 iov
[count
].iov_len
= sizeof(in_fiov
[0]) * in_count
;
626 out_fiov
= fuse_ioctl_iovec_copy(out_iov
, out_count
);
631 iov
[count
].iov_base
= (void *)out_fiov
;
632 iov
[count
].iov_len
= sizeof(out_fiov
[0]) * out_count
;
636 res
= send_reply_iov(req
, 0, iov
, count
);
644 res
= fuse_reply_err(req
, ENOMEM
);
648 int fuse_reply_ioctl(fuse_req_t req
, int result
, const void *buf
, size_t size
)
650 struct fuse_ioctl_out arg
;
654 memset(&arg
, 0, sizeof(arg
));
656 iov
[count
].iov_base
= &arg
;
657 iov
[count
].iov_len
= sizeof(arg
);
661 iov
[count
].iov_base
= (char *)buf
;
662 iov
[count
].iov_len
= size
;
666 return send_reply_iov(req
, 0, iov
, count
);
669 int fuse_reply_ioctl_iov(fuse_req_t req
, int result
, const struct iovec
*iov
,
672 struct iovec
*padded_iov
;
673 struct fuse_ioctl_out arg
;
676 padded_iov
= malloc((count
+ 2) * sizeof(struct iovec
));
677 if (padded_iov
== NULL
) {
678 return fuse_reply_err(req
, ENOMEM
);
681 memset(&arg
, 0, sizeof(arg
));
683 padded_iov
[1].iov_base
= &arg
;
684 padded_iov
[1].iov_len
= sizeof(arg
);
686 memcpy(&padded_iov
[2], iov
, count
* sizeof(struct iovec
));
688 res
= send_reply_iov(req
, 0, padded_iov
, count
+ 2);
694 int fuse_reply_poll(fuse_req_t req
, unsigned revents
)
696 struct fuse_poll_out arg
;
698 memset(&arg
, 0, sizeof(arg
));
699 arg
.revents
= revents
;
701 return send_reply_ok(req
, &arg
, sizeof(arg
));
704 int fuse_reply_lseek(fuse_req_t req
, off_t off
)
706 struct fuse_lseek_out arg
;
708 memset(&arg
, 0, sizeof(arg
));
711 return send_reply_ok(req
, &arg
, sizeof(arg
));
714 static void do_lookup(fuse_req_t req
, fuse_ino_t nodeid
,
715 struct fuse_mbuf_iter
*iter
)
717 const char *name
= fuse_mbuf_iter_advance_str(iter
);
719 fuse_reply_err(req
, EINVAL
);
723 if (req
->se
->op
.lookup
) {
724 req
->se
->op
.lookup(req
, nodeid
, name
);
726 fuse_reply_err(req
, ENOSYS
);
730 static void do_forget(fuse_req_t req
, fuse_ino_t nodeid
,
731 struct fuse_mbuf_iter
*iter
)
733 struct fuse_forget_in
*arg
;
735 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
737 fuse_reply_err(req
, EINVAL
);
741 if (req
->se
->op
.forget
) {
742 req
->se
->op
.forget(req
, nodeid
, arg
->nlookup
);
744 fuse_reply_none(req
);
748 static void do_batch_forget(fuse_req_t req
, fuse_ino_t nodeid
,
749 struct fuse_mbuf_iter
*iter
)
751 struct fuse_batch_forget_in
*arg
;
752 struct fuse_forget_data
*forgets
;
757 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
759 fuse_reply_none(req
);
764 * Prevent integer overflow. The compiler emits the following warning
765 * unless we use the scount local variable:
767 * error: comparison is always false due to limited range of data type
768 * [-Werror=type-limits]
770 * This may be true on 64-bit hosts but we need this check for 32-bit
774 if (scount
> SIZE_MAX
/ sizeof(forgets
[0])) {
775 fuse_reply_none(req
);
779 forgets
= fuse_mbuf_iter_advance(iter
, arg
->count
* sizeof(forgets
[0]));
781 fuse_reply_none(req
);
785 if (req
->se
->op
.forget_multi
) {
786 req
->se
->op
.forget_multi(req
, arg
->count
, forgets
);
787 } else if (req
->se
->op
.forget
) {
790 for (i
= 0; i
< arg
->count
; i
++) {
791 struct fuse_req
*dummy_req
;
793 dummy_req
= fuse_ll_alloc_req(req
->se
);
794 if (dummy_req
== NULL
) {
798 dummy_req
->unique
= req
->unique
;
799 dummy_req
->ctx
= req
->ctx
;
800 dummy_req
->ch
= NULL
;
802 req
->se
->op
.forget(dummy_req
, forgets
[i
].ino
, forgets
[i
].nlookup
);
804 fuse_reply_none(req
);
806 fuse_reply_none(req
);
810 static void do_getattr(fuse_req_t req
, fuse_ino_t nodeid
,
811 struct fuse_mbuf_iter
*iter
)
813 struct fuse_file_info
*fip
= NULL
;
814 struct fuse_file_info fi
;
816 struct fuse_getattr_in
*arg
;
818 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
820 fuse_reply_err(req
, EINVAL
);
824 if (arg
->getattr_flags
& FUSE_GETATTR_FH
) {
825 memset(&fi
, 0, sizeof(fi
));
830 if (req
->se
->op
.getattr
) {
831 req
->se
->op
.getattr(req
, nodeid
, fip
);
833 fuse_reply_err(req
, ENOSYS
);
837 static void do_setattr(fuse_req_t req
, fuse_ino_t nodeid
,
838 struct fuse_mbuf_iter
*iter
)
840 if (req
->se
->op
.setattr
) {
841 struct fuse_setattr_in
*arg
;
842 struct fuse_file_info
*fi
= NULL
;
843 struct fuse_file_info fi_store
;
846 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
848 fuse_reply_err(req
, EINVAL
);
852 memset(&stbuf
, 0, sizeof(stbuf
));
853 convert_attr(arg
, &stbuf
);
854 if (arg
->valid
& FATTR_FH
) {
855 arg
->valid
&= ~FATTR_FH
;
856 memset(&fi_store
, 0, sizeof(fi_store
));
860 arg
->valid
&= FUSE_SET_ATTR_MODE
| FUSE_SET_ATTR_UID
|
861 FUSE_SET_ATTR_GID
| FUSE_SET_ATTR_SIZE
|
862 FUSE_SET_ATTR_ATIME
| FUSE_SET_ATTR_MTIME
|
863 FUSE_SET_ATTR_ATIME_NOW
| FUSE_SET_ATTR_MTIME_NOW
|
866 req
->se
->op
.setattr(req
, nodeid
, &stbuf
, arg
->valid
, fi
);
868 fuse_reply_err(req
, ENOSYS
);
872 static void do_access(fuse_req_t req
, fuse_ino_t nodeid
,
873 struct fuse_mbuf_iter
*iter
)
875 struct fuse_access_in
*arg
;
877 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
879 fuse_reply_err(req
, EINVAL
);
883 if (req
->se
->op
.access
) {
884 req
->se
->op
.access(req
, nodeid
, arg
->mask
);
886 fuse_reply_err(req
, ENOSYS
);
890 static void do_readlink(fuse_req_t req
, fuse_ino_t nodeid
,
891 struct fuse_mbuf_iter
*iter
)
895 if (req
->se
->op
.readlink
) {
896 req
->se
->op
.readlink(req
, nodeid
);
898 fuse_reply_err(req
, ENOSYS
);
902 static void do_mknod(fuse_req_t req
, fuse_ino_t nodeid
,
903 struct fuse_mbuf_iter
*iter
)
905 struct fuse_mknod_in
*arg
;
908 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
909 name
= fuse_mbuf_iter_advance_str(iter
);
911 fuse_reply_err(req
, EINVAL
);
915 req
->ctx
.umask
= arg
->umask
;
917 if (req
->se
->op
.mknod
) {
918 req
->se
->op
.mknod(req
, nodeid
, name
, arg
->mode
, arg
->rdev
);
920 fuse_reply_err(req
, ENOSYS
);
924 static void do_mkdir(fuse_req_t req
, fuse_ino_t nodeid
,
925 struct fuse_mbuf_iter
*iter
)
927 struct fuse_mkdir_in
*arg
;
930 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
931 name
= fuse_mbuf_iter_advance_str(iter
);
933 fuse_reply_err(req
, EINVAL
);
937 req
->ctx
.umask
= arg
->umask
;
939 if (req
->se
->op
.mkdir
) {
940 req
->se
->op
.mkdir(req
, nodeid
, name
, arg
->mode
);
942 fuse_reply_err(req
, ENOSYS
);
946 static void do_unlink(fuse_req_t req
, fuse_ino_t nodeid
,
947 struct fuse_mbuf_iter
*iter
)
949 const char *name
= fuse_mbuf_iter_advance_str(iter
);
952 fuse_reply_err(req
, EINVAL
);
956 if (req
->se
->op
.unlink
) {
957 req
->se
->op
.unlink(req
, nodeid
, name
);
959 fuse_reply_err(req
, ENOSYS
);
963 static void do_rmdir(fuse_req_t req
, fuse_ino_t nodeid
,
964 struct fuse_mbuf_iter
*iter
)
966 const char *name
= fuse_mbuf_iter_advance_str(iter
);
969 fuse_reply_err(req
, EINVAL
);
973 if (req
->se
->op
.rmdir
) {
974 req
->se
->op
.rmdir(req
, nodeid
, name
);
976 fuse_reply_err(req
, ENOSYS
);
980 static void do_symlink(fuse_req_t req
, fuse_ino_t nodeid
,
981 struct fuse_mbuf_iter
*iter
)
983 const char *name
= fuse_mbuf_iter_advance_str(iter
);
984 const char *linkname
= fuse_mbuf_iter_advance_str(iter
);
986 if (!name
|| !linkname
) {
987 fuse_reply_err(req
, EINVAL
);
991 if (req
->se
->op
.symlink
) {
992 req
->se
->op
.symlink(req
, linkname
, nodeid
, name
);
994 fuse_reply_err(req
, ENOSYS
);
998 static void do_rename(fuse_req_t req
, fuse_ino_t nodeid
,
999 struct fuse_mbuf_iter
*iter
)
1001 struct fuse_rename_in
*arg
;
1002 const char *oldname
;
1003 const char *newname
;
1005 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1006 oldname
= fuse_mbuf_iter_advance_str(iter
);
1007 newname
= fuse_mbuf_iter_advance_str(iter
);
1008 if (!arg
|| !oldname
|| !newname
) {
1009 fuse_reply_err(req
, EINVAL
);
1013 if (req
->se
->op
.rename
) {
1014 req
->se
->op
.rename(req
, nodeid
, oldname
, arg
->newdir
, newname
, 0);
1016 fuse_reply_err(req
, ENOSYS
);
1020 static void do_rename2(fuse_req_t req
, fuse_ino_t nodeid
,
1021 struct fuse_mbuf_iter
*iter
)
1023 struct fuse_rename2_in
*arg
;
1024 const char *oldname
;
1025 const char *newname
;
1027 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1028 oldname
= fuse_mbuf_iter_advance_str(iter
);
1029 newname
= fuse_mbuf_iter_advance_str(iter
);
1030 if (!arg
|| !oldname
|| !newname
) {
1031 fuse_reply_err(req
, EINVAL
);
1035 if (req
->se
->op
.rename
) {
1036 req
->se
->op
.rename(req
, nodeid
, oldname
, arg
->newdir
, newname
,
1039 fuse_reply_err(req
, ENOSYS
);
1043 static void do_link(fuse_req_t req
, fuse_ino_t nodeid
,
1044 struct fuse_mbuf_iter
*iter
)
1046 struct fuse_link_in
*arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1047 const char *name
= fuse_mbuf_iter_advance_str(iter
);
1049 if (!arg
|| !name
) {
1050 fuse_reply_err(req
, EINVAL
);
1054 if (req
->se
->op
.link
) {
1055 req
->se
->op
.link(req
, arg
->oldnodeid
, nodeid
, name
);
1057 fuse_reply_err(req
, ENOSYS
);
1061 static void do_create(fuse_req_t req
, fuse_ino_t nodeid
,
1062 struct fuse_mbuf_iter
*iter
)
1064 if (req
->se
->op
.create
) {
1065 struct fuse_create_in
*arg
;
1066 struct fuse_file_info fi
;
1069 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1070 name
= fuse_mbuf_iter_advance_str(iter
);
1071 if (!arg
|| !name
) {
1072 fuse_reply_err(req
, EINVAL
);
1076 memset(&fi
, 0, sizeof(fi
));
1077 fi
.flags
= arg
->flags
;
1079 req
->ctx
.umask
= arg
->umask
;
1081 req
->se
->op
.create(req
, nodeid
, name
, arg
->mode
, &fi
);
1083 fuse_reply_err(req
, ENOSYS
);
1087 static void do_open(fuse_req_t req
, fuse_ino_t nodeid
,
1088 struct fuse_mbuf_iter
*iter
)
1090 struct fuse_open_in
*arg
;
1091 struct fuse_file_info fi
;
1093 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1095 fuse_reply_err(req
, EINVAL
);
1099 memset(&fi
, 0, sizeof(fi
));
1100 fi
.flags
= arg
->flags
;
1102 if (req
->se
->op
.open
) {
1103 req
->se
->op
.open(req
, nodeid
, &fi
);
1105 fuse_reply_open(req
, &fi
);
1109 static void do_read(fuse_req_t req
, fuse_ino_t nodeid
,
1110 struct fuse_mbuf_iter
*iter
)
1112 if (req
->se
->op
.read
) {
1113 struct fuse_read_in
*arg
;
1114 struct fuse_file_info fi
;
1116 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1118 memset(&fi
, 0, sizeof(fi
));
1120 fi
.lock_owner
= arg
->lock_owner
;
1121 fi
.flags
= arg
->flags
;
1122 req
->se
->op
.read(req
, nodeid
, arg
->size
, arg
->offset
, &fi
);
1124 fuse_reply_err(req
, ENOSYS
);
1128 static void do_write(fuse_req_t req
, fuse_ino_t nodeid
,
1129 struct fuse_mbuf_iter
*iter
)
1131 struct fuse_write_in
*arg
;
1132 struct fuse_file_info fi
;
1135 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1137 fuse_reply_err(req
, EINVAL
);
1141 param
= fuse_mbuf_iter_advance(iter
, arg
->size
);
1143 fuse_reply_err(req
, EINVAL
);
1147 memset(&fi
, 0, sizeof(fi
));
1149 fi
.writepage
= (arg
->write_flags
& FUSE_WRITE_CACHE
) != 0;
1150 fi
.kill_priv
= !!(arg
->write_flags
& FUSE_WRITE_KILL_PRIV
);
1152 fi
.lock_owner
= arg
->lock_owner
;
1153 fi
.flags
= arg
->flags
;
1155 if (req
->se
->op
.write
) {
1156 req
->se
->op
.write(req
, nodeid
, param
, arg
->size
, arg
->offset
, &fi
);
1158 fuse_reply_err(req
, ENOSYS
);
1162 static void do_write_buf(fuse_req_t req
, fuse_ino_t nodeid
,
1163 struct fuse_mbuf_iter
*iter
, struct fuse_bufvec
*ibufv
)
1165 struct fuse_session
*se
= req
->se
;
1166 struct fuse_bufvec
*pbufv
= ibufv
;
1167 struct fuse_bufvec tmpbufv
= {
1168 .buf
[0] = ibufv
->buf
[0],
1171 struct fuse_write_in
*arg
;
1172 size_t arg_size
= sizeof(*arg
);
1173 struct fuse_file_info fi
;
1175 memset(&fi
, 0, sizeof(fi
));
1177 arg
= fuse_mbuf_iter_advance(iter
, arg_size
);
1179 fuse_reply_err(req
, EINVAL
);
1183 fi
.lock_owner
= arg
->lock_owner
;
1184 fi
.flags
= arg
->flags
;
1186 fi
.writepage
= !!(arg
->write_flags
& FUSE_WRITE_CACHE
);
1187 fi
.kill_priv
= !!(arg
->write_flags
& FUSE_WRITE_KILL_PRIV
);
1189 if (ibufv
->count
== 1) {
1190 assert(!(tmpbufv
.buf
[0].flags
& FUSE_BUF_IS_FD
));
1191 tmpbufv
.buf
[0].mem
= ((char *)arg
) + arg_size
;
1192 tmpbufv
.buf
[0].size
-= sizeof(struct fuse_in_header
) + arg_size
;
1196 * Input bufv contains the headers in the first element
1197 * and the data in the rest, we need to skip that first element
1199 ibufv
->buf
[0].size
= 0;
1202 if (fuse_buf_size(pbufv
) != arg
->size
) {
1203 fuse_log(FUSE_LOG_ERR
,
1204 "fuse: do_write_buf: buffer size doesn't match arg->size\n");
1205 fuse_reply_err(req
, EIO
);
1209 se
->op
.write_buf(req
, nodeid
, pbufv
, arg
->offset
, &fi
);
1212 static void do_flush(fuse_req_t req
, fuse_ino_t nodeid
,
1213 struct fuse_mbuf_iter
*iter
)
1215 struct fuse_flush_in
*arg
;
1216 struct fuse_file_info fi
;
1218 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1220 fuse_reply_err(req
, EINVAL
);
1224 memset(&fi
, 0, sizeof(fi
));
1227 fi
.lock_owner
= arg
->lock_owner
;
1229 if (req
->se
->op
.flush
) {
1230 req
->se
->op
.flush(req
, nodeid
, &fi
);
1232 fuse_reply_err(req
, ENOSYS
);
1236 static void do_release(fuse_req_t req
, fuse_ino_t nodeid
,
1237 struct fuse_mbuf_iter
*iter
)
1239 struct fuse_release_in
*arg
;
1240 struct fuse_file_info fi
;
1242 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1244 fuse_reply_err(req
, EINVAL
);
1248 memset(&fi
, 0, sizeof(fi
));
1249 fi
.flags
= arg
->flags
;
1251 fi
.flush
= (arg
->release_flags
& FUSE_RELEASE_FLUSH
) ? 1 : 0;
1252 fi
.lock_owner
= arg
->lock_owner
;
1254 if (arg
->release_flags
& FUSE_RELEASE_FLOCK_UNLOCK
) {
1255 fi
.flock_release
= 1;
1258 if (req
->se
->op
.release
) {
1259 req
->se
->op
.release(req
, nodeid
, &fi
);
1261 fuse_reply_err(req
, 0);
1265 static void do_fsync(fuse_req_t req
, fuse_ino_t nodeid
,
1266 struct fuse_mbuf_iter
*iter
)
1268 struct fuse_fsync_in
*arg
;
1269 struct fuse_file_info fi
;
1272 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1274 fuse_reply_err(req
, EINVAL
);
1277 datasync
= arg
->fsync_flags
& 1;
1279 memset(&fi
, 0, sizeof(fi
));
1282 if (req
->se
->op
.fsync
) {
1283 if (fi
.fh
== (uint64_t)-1) {
1284 req
->se
->op
.fsync(req
, nodeid
, datasync
, NULL
);
1286 req
->se
->op
.fsync(req
, nodeid
, datasync
, &fi
);
1289 fuse_reply_err(req
, ENOSYS
);
1293 static void do_opendir(fuse_req_t req
, fuse_ino_t nodeid
,
1294 struct fuse_mbuf_iter
*iter
)
1296 struct fuse_open_in
*arg
;
1297 struct fuse_file_info fi
;
1299 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1301 fuse_reply_err(req
, EINVAL
);
1305 memset(&fi
, 0, sizeof(fi
));
1306 fi
.flags
= arg
->flags
;
1308 if (req
->se
->op
.opendir
) {
1309 req
->se
->op
.opendir(req
, nodeid
, &fi
);
1311 fuse_reply_open(req
, &fi
);
1315 static void do_readdir(fuse_req_t req
, fuse_ino_t nodeid
,
1316 struct fuse_mbuf_iter
*iter
)
1318 struct fuse_read_in
*arg
;
1319 struct fuse_file_info fi
;
1321 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1323 fuse_reply_err(req
, EINVAL
);
1327 memset(&fi
, 0, sizeof(fi
));
1330 if (req
->se
->op
.readdir
) {
1331 req
->se
->op
.readdir(req
, nodeid
, arg
->size
, arg
->offset
, &fi
);
1333 fuse_reply_err(req
, ENOSYS
);
1337 static void do_readdirplus(fuse_req_t req
, fuse_ino_t nodeid
,
1338 struct fuse_mbuf_iter
*iter
)
1340 struct fuse_read_in
*arg
;
1341 struct fuse_file_info fi
;
1343 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1345 fuse_reply_err(req
, EINVAL
);
1349 memset(&fi
, 0, sizeof(fi
));
1352 if (req
->se
->op
.readdirplus
) {
1353 req
->se
->op
.readdirplus(req
, nodeid
, arg
->size
, arg
->offset
, &fi
);
1355 fuse_reply_err(req
, ENOSYS
);
1359 static void do_releasedir(fuse_req_t req
, fuse_ino_t nodeid
,
1360 struct fuse_mbuf_iter
*iter
)
1362 struct fuse_release_in
*arg
;
1363 struct fuse_file_info fi
;
1365 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1367 fuse_reply_err(req
, EINVAL
);
1371 memset(&fi
, 0, sizeof(fi
));
1372 fi
.flags
= arg
->flags
;
1375 if (req
->se
->op
.releasedir
) {
1376 req
->se
->op
.releasedir(req
, nodeid
, &fi
);
1378 fuse_reply_err(req
, 0);
1382 static void do_fsyncdir(fuse_req_t req
, fuse_ino_t nodeid
,
1383 struct fuse_mbuf_iter
*iter
)
1385 struct fuse_fsync_in
*arg
;
1386 struct fuse_file_info fi
;
1389 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1391 fuse_reply_err(req
, EINVAL
);
1394 datasync
= arg
->fsync_flags
& 1;
1396 memset(&fi
, 0, sizeof(fi
));
1399 if (req
->se
->op
.fsyncdir
) {
1400 req
->se
->op
.fsyncdir(req
, nodeid
, datasync
, &fi
);
1402 fuse_reply_err(req
, ENOSYS
);
1406 static void do_statfs(fuse_req_t req
, fuse_ino_t nodeid
,
1407 struct fuse_mbuf_iter
*iter
)
1412 if (req
->se
->op
.statfs
) {
1413 req
->se
->op
.statfs(req
, nodeid
);
1415 struct statvfs buf
= {
1419 fuse_reply_statfs(req
, &buf
);
1423 static void do_setxattr(fuse_req_t req
, fuse_ino_t nodeid
,
1424 struct fuse_mbuf_iter
*iter
)
1426 struct fuse_setxattr_in
*arg
;
1430 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1431 name
= fuse_mbuf_iter_advance_str(iter
);
1432 if (!arg
|| !name
) {
1433 fuse_reply_err(req
, EINVAL
);
1437 value
= fuse_mbuf_iter_advance(iter
, arg
->size
);
1439 fuse_reply_err(req
, EINVAL
);
1443 if (req
->se
->op
.setxattr
) {
1444 req
->se
->op
.setxattr(req
, nodeid
, name
, value
, arg
->size
, arg
->flags
);
1446 fuse_reply_err(req
, ENOSYS
);
1450 static void do_getxattr(fuse_req_t req
, fuse_ino_t nodeid
,
1451 struct fuse_mbuf_iter
*iter
)
1453 struct fuse_getxattr_in
*arg
;
1456 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1457 name
= fuse_mbuf_iter_advance_str(iter
);
1458 if (!arg
|| !name
) {
1459 fuse_reply_err(req
, EINVAL
);
1463 if (req
->se
->op
.getxattr
) {
1464 req
->se
->op
.getxattr(req
, nodeid
, name
, arg
->size
);
1466 fuse_reply_err(req
, ENOSYS
);
1470 static void do_listxattr(fuse_req_t req
, fuse_ino_t nodeid
,
1471 struct fuse_mbuf_iter
*iter
)
1473 struct fuse_getxattr_in
*arg
;
1475 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1477 fuse_reply_err(req
, EINVAL
);
1481 if (req
->se
->op
.listxattr
) {
1482 req
->se
->op
.listxattr(req
, nodeid
, arg
->size
);
1484 fuse_reply_err(req
, ENOSYS
);
1488 static void do_removexattr(fuse_req_t req
, fuse_ino_t nodeid
,
1489 struct fuse_mbuf_iter
*iter
)
1491 const char *name
= fuse_mbuf_iter_advance_str(iter
);
1494 fuse_reply_err(req
, EINVAL
);
1498 if (req
->se
->op
.removexattr
) {
1499 req
->se
->op
.removexattr(req
, nodeid
, name
);
1501 fuse_reply_err(req
, ENOSYS
);
1505 static void convert_fuse_file_lock(struct fuse_file_lock
*fl
,
1506 struct flock
*flock
)
1508 memset(flock
, 0, sizeof(struct flock
));
1509 flock
->l_type
= fl
->type
;
1510 flock
->l_whence
= SEEK_SET
;
1511 flock
->l_start
= fl
->start
;
1512 if (fl
->end
== OFFSET_MAX
) {
1515 flock
->l_len
= fl
->end
- fl
->start
+ 1;
1517 flock
->l_pid
= fl
->pid
;
1520 static void do_getlk(fuse_req_t req
, fuse_ino_t nodeid
,
1521 struct fuse_mbuf_iter
*iter
)
1523 struct fuse_lk_in
*arg
;
1524 struct fuse_file_info fi
;
1527 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1529 fuse_reply_err(req
, EINVAL
);
1533 memset(&fi
, 0, sizeof(fi
));
1535 fi
.lock_owner
= arg
->owner
;
1537 convert_fuse_file_lock(&arg
->lk
, &flock
);
1538 if (req
->se
->op
.getlk
) {
1539 req
->se
->op
.getlk(req
, nodeid
, &fi
, &flock
);
1541 fuse_reply_err(req
, ENOSYS
);
1545 static void do_setlk_common(fuse_req_t req
, fuse_ino_t nodeid
,
1546 struct fuse_mbuf_iter
*iter
, int sleep
)
1548 struct fuse_lk_in
*arg
;
1549 struct fuse_file_info fi
;
1552 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1554 fuse_reply_err(req
, EINVAL
);
1558 memset(&fi
, 0, sizeof(fi
));
1560 fi
.lock_owner
= arg
->owner
;
1562 if (arg
->lk_flags
& FUSE_LK_FLOCK
) {
1565 switch (arg
->lk
.type
) {
1580 if (req
->se
->op
.flock
) {
1581 req
->se
->op
.flock(req
, nodeid
, &fi
, op
);
1583 fuse_reply_err(req
, ENOSYS
);
1586 convert_fuse_file_lock(&arg
->lk
, &flock
);
1587 if (req
->se
->op
.setlk
) {
1588 req
->se
->op
.setlk(req
, nodeid
, &fi
, &flock
, sleep
);
1590 fuse_reply_err(req
, ENOSYS
);
1595 static void do_setlk(fuse_req_t req
, fuse_ino_t nodeid
,
1596 struct fuse_mbuf_iter
*iter
)
1598 do_setlk_common(req
, nodeid
, iter
, 0);
1601 static void do_setlkw(fuse_req_t req
, fuse_ino_t nodeid
,
1602 struct fuse_mbuf_iter
*iter
)
1604 do_setlk_common(req
, nodeid
, iter
, 1);
1607 static int find_interrupted(struct fuse_session
*se
, struct fuse_req
*req
)
1609 struct fuse_req
*curr
;
1611 for (curr
= se
->list
.next
; curr
!= &se
->list
; curr
= curr
->next
) {
1612 if (curr
->unique
== req
->u
.i
.unique
) {
1613 fuse_interrupt_func_t func
;
1617 pthread_mutex_unlock(&se
->lock
);
1619 /* Ugh, ugly locking */
1620 pthread_mutex_lock(&curr
->lock
);
1621 pthread_mutex_lock(&se
->lock
);
1622 curr
->interrupted
= 1;
1623 func
= curr
->u
.ni
.func
;
1624 data
= curr
->u
.ni
.data
;
1625 pthread_mutex_unlock(&se
->lock
);
1629 pthread_mutex_unlock(&curr
->lock
);
1631 pthread_mutex_lock(&se
->lock
);
1640 for (curr
= se
->interrupts
.next
; curr
!= &se
->interrupts
;
1641 curr
= curr
->next
) {
1642 if (curr
->u
.i
.unique
== req
->u
.i
.unique
) {
1649 static void do_interrupt(fuse_req_t req
, fuse_ino_t nodeid
,
1650 struct fuse_mbuf_iter
*iter
)
1652 struct fuse_interrupt_in
*arg
;
1653 struct fuse_session
*se
= req
->se
;
1657 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1659 fuse_reply_err(req
, EINVAL
);
1663 fuse_log(FUSE_LOG_DEBUG
, "INTERRUPT: %llu\n",
1664 (unsigned long long)arg
->unique
);
1666 req
->u
.i
.unique
= arg
->unique
;
1668 pthread_mutex_lock(&se
->lock
);
1669 if (find_interrupted(se
, req
)) {
1672 list_add_req(req
, &se
->interrupts
);
1674 pthread_mutex_unlock(&se
->lock
);
1677 static struct fuse_req
*check_interrupt(struct fuse_session
*se
,
1678 struct fuse_req
*req
)
1680 struct fuse_req
*curr
;
1682 for (curr
= se
->interrupts
.next
; curr
!= &se
->interrupts
;
1683 curr
= curr
->next
) {
1684 if (curr
->u
.i
.unique
== req
->unique
) {
1685 req
->interrupted
= 1;
1691 curr
= se
->interrupts
.next
;
1692 if (curr
!= &se
->interrupts
) {
1694 list_init_req(curr
);
1701 static void do_bmap(fuse_req_t req
, fuse_ino_t nodeid
,
1702 struct fuse_mbuf_iter
*iter
)
1704 struct fuse_bmap_in
*arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1707 fuse_reply_err(req
, EINVAL
);
1711 if (req
->se
->op
.bmap
) {
1712 req
->se
->op
.bmap(req
, nodeid
, arg
->blocksize
, arg
->block
);
1714 fuse_reply_err(req
, ENOSYS
);
1718 static void do_ioctl(fuse_req_t req
, fuse_ino_t nodeid
,
1719 struct fuse_mbuf_iter
*iter
)
1721 struct fuse_ioctl_in
*arg
;
1723 void *in_buf
= NULL
;
1724 struct fuse_file_info fi
;
1726 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1728 fuse_reply_err(req
, EINVAL
);
1733 if (flags
& FUSE_IOCTL_DIR
&& !(req
->se
->conn
.want
& FUSE_CAP_IOCTL_DIR
)) {
1734 fuse_reply_err(req
, ENOTTY
);
1739 in_buf
= fuse_mbuf_iter_advance(iter
, arg
->in_size
);
1741 fuse_reply_err(req
, EINVAL
);
1746 memset(&fi
, 0, sizeof(fi
));
1749 if (sizeof(void *) == 4 && !(flags
& FUSE_IOCTL_32BIT
)) {
1750 req
->ioctl_64bit
= 1;
1753 if (req
->se
->op
.ioctl
) {
1754 req
->se
->op
.ioctl(req
, nodeid
, arg
->cmd
, (void *)(uintptr_t)arg
->arg
,
1755 &fi
, flags
, in_buf
, arg
->in_size
, arg
->out_size
);
1757 fuse_reply_err(req
, ENOSYS
);
1761 void fuse_pollhandle_destroy(struct fuse_pollhandle
*ph
)
1766 static void do_poll(fuse_req_t req
, fuse_ino_t nodeid
,
1767 struct fuse_mbuf_iter
*iter
)
1769 struct fuse_poll_in
*arg
;
1770 struct fuse_file_info fi
;
1772 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1774 fuse_reply_err(req
, EINVAL
);
1778 memset(&fi
, 0, sizeof(fi
));
1780 fi
.poll_events
= arg
->events
;
1782 if (req
->se
->op
.poll
) {
1783 struct fuse_pollhandle
*ph
= NULL
;
1785 if (arg
->flags
& FUSE_POLL_SCHEDULE_NOTIFY
) {
1786 ph
= malloc(sizeof(struct fuse_pollhandle
));
1788 fuse_reply_err(req
, ENOMEM
);
1795 req
->se
->op
.poll(req
, nodeid
, &fi
, ph
);
1797 fuse_reply_err(req
, ENOSYS
);
1801 static void do_fallocate(fuse_req_t req
, fuse_ino_t nodeid
,
1802 struct fuse_mbuf_iter
*iter
)
1804 struct fuse_fallocate_in
*arg
;
1805 struct fuse_file_info fi
;
1807 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1809 fuse_reply_err(req
, EINVAL
);
1813 memset(&fi
, 0, sizeof(fi
));
1816 if (req
->se
->op
.fallocate
) {
1817 req
->se
->op
.fallocate(req
, nodeid
, arg
->mode
, arg
->offset
, arg
->length
,
1820 fuse_reply_err(req
, ENOSYS
);
1824 static void do_copy_file_range(fuse_req_t req
, fuse_ino_t nodeid_in
,
1825 struct fuse_mbuf_iter
*iter
)
1827 struct fuse_copy_file_range_in
*arg
;
1828 struct fuse_file_info fi_in
, fi_out
;
1830 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1832 fuse_reply_err(req
, EINVAL
);
1836 memset(&fi_in
, 0, sizeof(fi_in
));
1837 fi_in
.fh
= arg
->fh_in
;
1839 memset(&fi_out
, 0, sizeof(fi_out
));
1840 fi_out
.fh
= arg
->fh_out
;
1843 if (req
->se
->op
.copy_file_range
) {
1844 req
->se
->op
.copy_file_range(req
, nodeid_in
, arg
->off_in
, &fi_in
,
1845 arg
->nodeid_out
, arg
->off_out
, &fi_out
,
1846 arg
->len
, arg
->flags
);
1848 fuse_reply_err(req
, ENOSYS
);
1852 static void do_lseek(fuse_req_t req
, fuse_ino_t nodeid
,
1853 struct fuse_mbuf_iter
*iter
)
1855 struct fuse_lseek_in
*arg
;
1856 struct fuse_file_info fi
;
1858 arg
= fuse_mbuf_iter_advance(iter
, sizeof(*arg
));
1860 fuse_reply_err(req
, EINVAL
);
1863 memset(&fi
, 0, sizeof(fi
));
1866 if (req
->se
->op
.lseek
) {
1867 req
->se
->op
.lseek(req
, nodeid
, arg
->offset
, arg
->whence
, &fi
);
1869 fuse_reply_err(req
, ENOSYS
);
1873 static void do_init(fuse_req_t req
, fuse_ino_t nodeid
,
1874 struct fuse_mbuf_iter
*iter
)
1876 size_t compat_size
= offsetof(struct fuse_init_in
, max_readahead
);
1877 struct fuse_init_in
*arg
;
1878 struct fuse_init_out outarg
;
1879 struct fuse_session
*se
= req
->se
;
1880 size_t bufsize
= se
->bufsize
;
1881 size_t outargsize
= sizeof(outarg
);
1885 /* First consume the old fields... */
1886 arg
= fuse_mbuf_iter_advance(iter
, compat_size
);
1888 fuse_reply_err(req
, EINVAL
);
1892 /* ...and now consume the new fields. */
1893 if (arg
->major
== 7 && arg
->minor
>= 6) {
1894 if (!fuse_mbuf_iter_advance(iter
, sizeof(*arg
) - compat_size
)) {
1895 fuse_reply_err(req
, EINVAL
);
1900 fuse_log(FUSE_LOG_DEBUG
, "INIT: %u.%u\n", arg
->major
, arg
->minor
);
1901 if (arg
->major
== 7 && arg
->minor
>= 6) {
1902 fuse_log(FUSE_LOG_DEBUG
, "flags=0x%08x\n", arg
->flags
);
1903 fuse_log(FUSE_LOG_DEBUG
, "max_readahead=0x%08x\n", arg
->max_readahead
);
1905 se
->conn
.proto_major
= arg
->major
;
1906 se
->conn
.proto_minor
= arg
->minor
;
1907 se
->conn
.capable
= 0;
1910 memset(&outarg
, 0, sizeof(outarg
));
1911 outarg
.major
= FUSE_KERNEL_VERSION
;
1912 outarg
.minor
= FUSE_KERNEL_MINOR_VERSION
;
1914 if (arg
->major
< 7 || (arg
->major
== 7 && arg
->minor
< 31)) {
1915 fuse_log(FUSE_LOG_ERR
, "fuse: unsupported protocol version: %u.%u\n",
1916 arg
->major
, arg
->minor
);
1917 fuse_reply_err(req
, EPROTO
);
1921 if (arg
->major
> 7) {
1922 /* Wait for a second INIT request with a 7.X version */
1923 send_reply_ok(req
, &outarg
, sizeof(outarg
));
1927 if (arg
->max_readahead
< se
->conn
.max_readahead
) {
1928 se
->conn
.max_readahead
= arg
->max_readahead
;
1930 if (arg
->flags
& FUSE_ASYNC_READ
) {
1931 se
->conn
.capable
|= FUSE_CAP_ASYNC_READ
;
1933 if (arg
->flags
& FUSE_POSIX_LOCKS
) {
1934 se
->conn
.capable
|= FUSE_CAP_POSIX_LOCKS
;
1936 if (arg
->flags
& FUSE_ATOMIC_O_TRUNC
) {
1937 se
->conn
.capable
|= FUSE_CAP_ATOMIC_O_TRUNC
;
1939 if (arg
->flags
& FUSE_EXPORT_SUPPORT
) {
1940 se
->conn
.capable
|= FUSE_CAP_EXPORT_SUPPORT
;
1942 if (arg
->flags
& FUSE_DONT_MASK
) {
1943 se
->conn
.capable
|= FUSE_CAP_DONT_MASK
;
1945 if (arg
->flags
& FUSE_FLOCK_LOCKS
) {
1946 se
->conn
.capable
|= FUSE_CAP_FLOCK_LOCKS
;
1948 if (arg
->flags
& FUSE_AUTO_INVAL_DATA
) {
1949 se
->conn
.capable
|= FUSE_CAP_AUTO_INVAL_DATA
;
1951 if (arg
->flags
& FUSE_DO_READDIRPLUS
) {
1952 se
->conn
.capable
|= FUSE_CAP_READDIRPLUS
;
1954 if (arg
->flags
& FUSE_READDIRPLUS_AUTO
) {
1955 se
->conn
.capable
|= FUSE_CAP_READDIRPLUS_AUTO
;
1957 if (arg
->flags
& FUSE_ASYNC_DIO
) {
1958 se
->conn
.capable
|= FUSE_CAP_ASYNC_DIO
;
1960 if (arg
->flags
& FUSE_WRITEBACK_CACHE
) {
1961 se
->conn
.capable
|= FUSE_CAP_WRITEBACK_CACHE
;
1963 if (arg
->flags
& FUSE_NO_OPEN_SUPPORT
) {
1964 se
->conn
.capable
|= FUSE_CAP_NO_OPEN_SUPPORT
;
1966 if (arg
->flags
& FUSE_PARALLEL_DIROPS
) {
1967 se
->conn
.capable
|= FUSE_CAP_PARALLEL_DIROPS
;
1969 if (arg
->flags
& FUSE_POSIX_ACL
) {
1970 se
->conn
.capable
|= FUSE_CAP_POSIX_ACL
;
1972 if (arg
->flags
& FUSE_HANDLE_KILLPRIV
) {
1973 se
->conn
.capable
|= FUSE_CAP_HANDLE_KILLPRIV
;
1975 if (arg
->flags
& FUSE_NO_OPENDIR_SUPPORT
) {
1976 se
->conn
.capable
|= FUSE_CAP_NO_OPENDIR_SUPPORT
;
1978 if (!(arg
->flags
& FUSE_MAX_PAGES
)) {
1979 size_t max_bufsize
= FUSE_DEFAULT_MAX_PAGES_PER_REQ
* getpagesize() +
1980 FUSE_BUFFER_HEADER_SIZE
;
1981 if (bufsize
> max_bufsize
) {
1982 bufsize
= max_bufsize
;
1986 #ifdef HAVE_VMSPLICE
1987 se
->conn
.capable
|= FUSE_CAP_SPLICE_WRITE
| FUSE_CAP_SPLICE_MOVE
;
1989 se
->conn
.capable
|= FUSE_CAP_SPLICE_READ
;
1991 se
->conn
.capable
|= FUSE_CAP_IOCTL_DIR
;
1994 * Default settings for modern filesystems.
1996 * Most of these capabilities were disabled by default in
1997 * libfuse2 for backwards compatibility reasons. In libfuse3,
1998 * we can finally enable them by default (as long as they're
1999 * supported by the kernel).
2001 #define LL_SET_DEFAULT(cond, cap) \
2002 if ((cond) && (se->conn.capable & (cap))) \
2003 se->conn.want |= (cap)
2004 LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ
);
2005 LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS
);
2006 LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA
);
2007 LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV
);
2008 LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO
);
2009 LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR
);
2010 LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC
);
2011 LL_SET_DEFAULT(se
->op
.write_buf
, FUSE_CAP_SPLICE_READ
);
2012 LL_SET_DEFAULT(se
->op
.getlk
&& se
->op
.setlk
, FUSE_CAP_POSIX_LOCKS
);
2013 LL_SET_DEFAULT(se
->op
.flock
, FUSE_CAP_FLOCK_LOCKS
);
2014 LL_SET_DEFAULT(se
->op
.readdirplus
, FUSE_CAP_READDIRPLUS
);
2015 LL_SET_DEFAULT(se
->op
.readdirplus
&& se
->op
.readdir
,
2016 FUSE_CAP_READDIRPLUS_AUTO
);
2017 se
->conn
.time_gran
= 1;
2019 if (bufsize
< FUSE_MIN_READ_BUFFER
) {
2020 fuse_log(FUSE_LOG_ERR
, "fuse: warning: buffer size too small: %zu\n",
2022 bufsize
= FUSE_MIN_READ_BUFFER
;
2024 se
->bufsize
= bufsize
;
2026 if (se
->conn
.max_write
> bufsize
- FUSE_BUFFER_HEADER_SIZE
) {
2027 se
->conn
.max_write
= bufsize
- FUSE_BUFFER_HEADER_SIZE
;
2031 se
->got_destroy
= 0;
2033 se
->op
.init(se
->userdata
, &se
->conn
);
2036 if (se
->conn
.want
& (~se
->conn
.capable
)) {
2037 fuse_log(FUSE_LOG_ERR
,
2038 "fuse: error: filesystem requested capabilities "
2039 "0x%x that are not supported by kernel, aborting.\n",
2040 se
->conn
.want
& (~se
->conn
.capable
));
2041 fuse_reply_err(req
, EPROTO
);
2042 se
->error
= -EPROTO
;
2043 fuse_session_exit(se
);
2047 if (se
->conn
.max_write
< bufsize
- FUSE_BUFFER_HEADER_SIZE
) {
2048 se
->bufsize
= se
->conn
.max_write
+ FUSE_BUFFER_HEADER_SIZE
;
2050 if (arg
->flags
& FUSE_MAX_PAGES
) {
2051 outarg
.flags
|= FUSE_MAX_PAGES
;
2052 outarg
.max_pages
= (se
->conn
.max_write
- 1) / getpagesize() + 1;
2056 * Always enable big writes, this is superseded
2057 * by the max_write option
2059 outarg
.flags
|= FUSE_BIG_WRITES
;
2061 if (se
->conn
.want
& FUSE_CAP_ASYNC_READ
) {
2062 outarg
.flags
|= FUSE_ASYNC_READ
;
2064 if (se
->conn
.want
& FUSE_CAP_POSIX_LOCKS
) {
2065 outarg
.flags
|= FUSE_POSIX_LOCKS
;
2067 if (se
->conn
.want
& FUSE_CAP_ATOMIC_O_TRUNC
) {
2068 outarg
.flags
|= FUSE_ATOMIC_O_TRUNC
;
2070 if (se
->conn
.want
& FUSE_CAP_EXPORT_SUPPORT
) {
2071 outarg
.flags
|= FUSE_EXPORT_SUPPORT
;
2073 if (se
->conn
.want
& FUSE_CAP_DONT_MASK
) {
2074 outarg
.flags
|= FUSE_DONT_MASK
;
2076 if (se
->conn
.want
& FUSE_CAP_FLOCK_LOCKS
) {
2077 outarg
.flags
|= FUSE_FLOCK_LOCKS
;
2079 if (se
->conn
.want
& FUSE_CAP_AUTO_INVAL_DATA
) {
2080 outarg
.flags
|= FUSE_AUTO_INVAL_DATA
;
2082 if (se
->conn
.want
& FUSE_CAP_READDIRPLUS
) {
2083 outarg
.flags
|= FUSE_DO_READDIRPLUS
;
2085 if (se
->conn
.want
& FUSE_CAP_READDIRPLUS_AUTO
) {
2086 outarg
.flags
|= FUSE_READDIRPLUS_AUTO
;
2088 if (se
->conn
.want
& FUSE_CAP_ASYNC_DIO
) {
2089 outarg
.flags
|= FUSE_ASYNC_DIO
;
2091 if (se
->conn
.want
& FUSE_CAP_WRITEBACK_CACHE
) {
2092 outarg
.flags
|= FUSE_WRITEBACK_CACHE
;
2094 if (se
->conn
.want
& FUSE_CAP_POSIX_ACL
) {
2095 outarg
.flags
|= FUSE_POSIX_ACL
;
2097 outarg
.max_readahead
= se
->conn
.max_readahead
;
2098 outarg
.max_write
= se
->conn
.max_write
;
2099 if (se
->conn
.max_background
>= (1 << 16)) {
2100 se
->conn
.max_background
= (1 << 16) - 1;
2102 if (se
->conn
.congestion_threshold
> se
->conn
.max_background
) {
2103 se
->conn
.congestion_threshold
= se
->conn
.max_background
;
2105 if (!se
->conn
.congestion_threshold
) {
2106 se
->conn
.congestion_threshold
= se
->conn
.max_background
* 3 / 4;
2109 outarg
.max_background
= se
->conn
.max_background
;
2110 outarg
.congestion_threshold
= se
->conn
.congestion_threshold
;
2111 outarg
.time_gran
= se
->conn
.time_gran
;
2113 fuse_log(FUSE_LOG_DEBUG
, " INIT: %u.%u\n", outarg
.major
, outarg
.minor
);
2114 fuse_log(FUSE_LOG_DEBUG
, " flags=0x%08x\n", outarg
.flags
);
2115 fuse_log(FUSE_LOG_DEBUG
, " max_readahead=0x%08x\n", outarg
.max_readahead
);
2116 fuse_log(FUSE_LOG_DEBUG
, " max_write=0x%08x\n", outarg
.max_write
);
2117 fuse_log(FUSE_LOG_DEBUG
, " max_background=%i\n", outarg
.max_background
);
2118 fuse_log(FUSE_LOG_DEBUG
, " congestion_threshold=%i\n",
2119 outarg
.congestion_threshold
);
2120 fuse_log(FUSE_LOG_DEBUG
, " time_gran=%u\n", outarg
.time_gran
);
2122 send_reply_ok(req
, &outarg
, outargsize
);
2125 static void do_destroy(fuse_req_t req
, fuse_ino_t nodeid
,
2126 struct fuse_mbuf_iter
*iter
)
2128 struct fuse_session
*se
= req
->se
;
2133 se
->got_destroy
= 1;
2135 if (se
->op
.destroy
) {
2136 se
->op
.destroy(se
->userdata
);
2139 send_reply_ok(req
, NULL
, 0);
2142 static int send_notify_iov(struct fuse_session
*se
, int notify_code
,
2143 struct iovec
*iov
, int count
)
2145 struct fuse_out_header out
= {
2146 .error
= notify_code
,
2149 if (!se
->got_init
) {
2153 iov
[0].iov_base
= &out
;
2154 iov
[0].iov_len
= sizeof(struct fuse_out_header
);
2156 return fuse_send_msg(se
, NULL
, iov
, count
);
2159 int fuse_lowlevel_notify_poll(struct fuse_pollhandle
*ph
)
2162 struct fuse_notify_poll_wakeup_out outarg
= {
2165 struct iovec iov
[2];
2167 iov
[1].iov_base
= &outarg
;
2168 iov
[1].iov_len
= sizeof(outarg
);
2170 return send_notify_iov(ph
->se
, FUSE_NOTIFY_POLL
, iov
, 2);
2176 int fuse_lowlevel_notify_inval_inode(struct fuse_session
*se
, fuse_ino_t ino
,
2177 off_t off
, off_t len
)
2179 struct fuse_notify_inval_inode_out outarg
= {
2184 struct iovec iov
[2];
2190 iov
[1].iov_base
= &outarg
;
2191 iov
[1].iov_len
= sizeof(outarg
);
2193 return send_notify_iov(se
, FUSE_NOTIFY_INVAL_INODE
, iov
, 2);
2196 int fuse_lowlevel_notify_inval_entry(struct fuse_session
*se
, fuse_ino_t parent
,
2197 const char *name
, size_t namelen
)
2199 struct fuse_notify_inval_entry_out outarg
= {
2203 struct iovec iov
[3];
2209 iov
[1].iov_base
= &outarg
;
2210 iov
[1].iov_len
= sizeof(outarg
);
2211 iov
[2].iov_base
= (void *)name
;
2212 iov
[2].iov_len
= namelen
+ 1;
2214 return send_notify_iov(se
, FUSE_NOTIFY_INVAL_ENTRY
, iov
, 3);
2217 int fuse_lowlevel_notify_delete(struct fuse_session
*se
, fuse_ino_t parent
,
2218 fuse_ino_t child
, const char *name
,
2221 struct fuse_notify_delete_out outarg
= {
2226 struct iovec iov
[3];
2232 iov
[1].iov_base
= &outarg
;
2233 iov
[1].iov_len
= sizeof(outarg
);
2234 iov
[2].iov_base
= (void *)name
;
2235 iov
[2].iov_len
= namelen
+ 1;
2237 return send_notify_iov(se
, FUSE_NOTIFY_DELETE
, iov
, 3);
2240 int fuse_lowlevel_notify_store(struct fuse_session
*se
, fuse_ino_t ino
,
2241 off_t offset
, struct fuse_bufvec
*bufv
)
2243 struct fuse_out_header out
= {
2244 .error
= FUSE_NOTIFY_STORE
,
2246 struct fuse_notify_store_out outarg
= {
2249 .size
= fuse_buf_size(bufv
),
2251 struct iovec iov
[3];
2258 iov
[0].iov_base
= &out
;
2259 iov
[0].iov_len
= sizeof(out
);
2260 iov
[1].iov_base
= &outarg
;
2261 iov
[1].iov_len
= sizeof(outarg
);
2263 res
= fuse_send_data_iov(se
, NULL
, iov
, 2, bufv
);
2271 void *fuse_req_userdata(fuse_req_t req
)
2273 return req
->se
->userdata
;
2276 const struct fuse_ctx
*fuse_req_ctx(fuse_req_t req
)
2281 void fuse_req_interrupt_func(fuse_req_t req
, fuse_interrupt_func_t func
,
2284 pthread_mutex_lock(&req
->lock
);
2285 pthread_mutex_lock(&req
->se
->lock
);
2286 req
->u
.ni
.func
= func
;
2287 req
->u
.ni
.data
= data
;
2288 pthread_mutex_unlock(&req
->se
->lock
);
2289 if (req
->interrupted
&& func
) {
2292 pthread_mutex_unlock(&req
->lock
);
2295 int fuse_req_interrupted(fuse_req_t req
)
2299 pthread_mutex_lock(&req
->se
->lock
);
2300 interrupted
= req
->interrupted
;
2301 pthread_mutex_unlock(&req
->se
->lock
);
2307 void (*func
)(fuse_req_t
, fuse_ino_t
, struct fuse_mbuf_iter
*);
2310 [FUSE_LOOKUP
] = { do_lookup
, "LOOKUP" },
2311 [FUSE_FORGET
] = { do_forget
, "FORGET" },
2312 [FUSE_GETATTR
] = { do_getattr
, "GETATTR" },
2313 [FUSE_SETATTR
] = { do_setattr
, "SETATTR" },
2314 [FUSE_READLINK
] = { do_readlink
, "READLINK" },
2315 [FUSE_SYMLINK
] = { do_symlink
, "SYMLINK" },
2316 [FUSE_MKNOD
] = { do_mknod
, "MKNOD" },
2317 [FUSE_MKDIR
] = { do_mkdir
, "MKDIR" },
2318 [FUSE_UNLINK
] = { do_unlink
, "UNLINK" },
2319 [FUSE_RMDIR
] = { do_rmdir
, "RMDIR" },
2320 [FUSE_RENAME
] = { do_rename
, "RENAME" },
2321 [FUSE_LINK
] = { do_link
, "LINK" },
2322 [FUSE_OPEN
] = { do_open
, "OPEN" },
2323 [FUSE_READ
] = { do_read
, "READ" },
2324 [FUSE_WRITE
] = { do_write
, "WRITE" },
2325 [FUSE_STATFS
] = { do_statfs
, "STATFS" },
2326 [FUSE_RELEASE
] = { do_release
, "RELEASE" },
2327 [FUSE_FSYNC
] = { do_fsync
, "FSYNC" },
2328 [FUSE_SETXATTR
] = { do_setxattr
, "SETXATTR" },
2329 [FUSE_GETXATTR
] = { do_getxattr
, "GETXATTR" },
2330 [FUSE_LISTXATTR
] = { do_listxattr
, "LISTXATTR" },
2331 [FUSE_REMOVEXATTR
] = { do_removexattr
, "REMOVEXATTR" },
2332 [FUSE_FLUSH
] = { do_flush
, "FLUSH" },
2333 [FUSE_INIT
] = { do_init
, "INIT" },
2334 [FUSE_OPENDIR
] = { do_opendir
, "OPENDIR" },
2335 [FUSE_READDIR
] = { do_readdir
, "READDIR" },
2336 [FUSE_RELEASEDIR
] = { do_releasedir
, "RELEASEDIR" },
2337 [FUSE_FSYNCDIR
] = { do_fsyncdir
, "FSYNCDIR" },
2338 [FUSE_GETLK
] = { do_getlk
, "GETLK" },
2339 [FUSE_SETLK
] = { do_setlk
, "SETLK" },
2340 [FUSE_SETLKW
] = { do_setlkw
, "SETLKW" },
2341 [FUSE_ACCESS
] = { do_access
, "ACCESS" },
2342 [FUSE_CREATE
] = { do_create
, "CREATE" },
2343 [FUSE_INTERRUPT
] = { do_interrupt
, "INTERRUPT" },
2344 [FUSE_BMAP
] = { do_bmap
, "BMAP" },
2345 [FUSE_IOCTL
] = { do_ioctl
, "IOCTL" },
2346 [FUSE_POLL
] = { do_poll
, "POLL" },
2347 [FUSE_FALLOCATE
] = { do_fallocate
, "FALLOCATE" },
2348 [FUSE_DESTROY
] = { do_destroy
, "DESTROY" },
2349 [FUSE_NOTIFY_REPLY
] = { NULL
, "NOTIFY_REPLY" },
2350 [FUSE_BATCH_FORGET
] = { do_batch_forget
, "BATCH_FORGET" },
2351 [FUSE_READDIRPLUS
] = { do_readdirplus
, "READDIRPLUS" },
2352 [FUSE_RENAME2
] = { do_rename2
, "RENAME2" },
2353 [FUSE_COPY_FILE_RANGE
] = { do_copy_file_range
, "COPY_FILE_RANGE" },
2354 [FUSE_LSEEK
] = { do_lseek
, "LSEEK" },
2357 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
2359 static const char *opname(enum fuse_opcode opcode
)
2361 if (opcode
>= FUSE_MAXOP
|| !fuse_ll_ops
[opcode
].name
) {
2364 return fuse_ll_ops
[opcode
].name
;
2368 void fuse_session_process_buf(struct fuse_session
*se
,
2369 const struct fuse_buf
*buf
)
2371 struct fuse_bufvec bufv
= { .buf
[0] = *buf
, .count
= 1 };
2372 fuse_session_process_buf_int(se
, &bufv
, NULL
);
2377 * bufv is normally a single entry buffer, except for a write
2378 * where (if it's in memory) then the bufv may be multiple entries,
2379 * where the first entry contains all headers and subsequent entries
2381 * bufv shall not use any offsets etc to make the data anything
2382 * other than contiguous starting from 0.
2384 void fuse_session_process_buf_int(struct fuse_session
*se
,
2385 struct fuse_bufvec
*bufv
,
2386 struct fuse_chan
*ch
)
2388 const struct fuse_buf
*buf
= bufv
->buf
;
2389 struct fuse_mbuf_iter iter
= FUSE_MBUF_ITER_INIT(buf
);
2390 struct fuse_in_header
*in
;
2391 struct fuse_req
*req
;
2394 /* The first buffer must be a memory buffer */
2395 assert(!(buf
->flags
& FUSE_BUF_IS_FD
));
2397 in
= fuse_mbuf_iter_advance(&iter
, sizeof(*in
));
2398 assert(in
); /* caller guarantees the input buffer is large enough */
2402 "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
2403 (unsigned long long)in
->unique
, opname((enum fuse_opcode
)in
->opcode
),
2404 in
->opcode
, (unsigned long long)in
->nodeid
, buf
->size
, in
->pid
);
2406 req
= fuse_ll_alloc_req(se
);
2408 struct fuse_out_header out
= {
2409 .unique
= in
->unique
,
2412 struct iovec iov
= {
2414 .iov_len
= sizeof(struct fuse_out_header
),
2417 fuse_send_msg(se
, ch
, &iov
, 1);
2421 req
->unique
= in
->unique
;
2422 req
->ctx
.uid
= in
->uid
;
2423 req
->ctx
.gid
= in
->gid
;
2424 req
->ctx
.pid
= in
->pid
;
2428 if (!se
->got_init
) {
2429 enum fuse_opcode expected
;
2431 expected
= se
->cuse_data
? CUSE_INIT
: FUSE_INIT
;
2432 if (in
->opcode
!= expected
) {
2435 } else if (in
->opcode
== FUSE_INIT
|| in
->opcode
== CUSE_INIT
) {
2436 if (fuse_lowlevel_is_virtio(se
)) {
2438 * TODO: This is after a hard reboot typically, we need to do
2439 * a destroy, but we can't reply to this request yet so
2440 * we can't use do_destroy
2442 fuse_log(FUSE_LOG_DEBUG
, "%s: reinit\n", __func__
);
2443 se
->got_destroy
= 1;
2445 if (se
->op
.destroy
) {
2446 se
->op
.destroy(se
->userdata
);
2454 /* Implement -o allow_root */
2455 if (se
->deny_others
&& in
->uid
!= se
->owner
&& in
->uid
!= 0 &&
2456 in
->opcode
!= FUSE_INIT
&& in
->opcode
!= FUSE_READ
&&
2457 in
->opcode
!= FUSE_WRITE
&& in
->opcode
!= FUSE_FSYNC
&&
2458 in
->opcode
!= FUSE_RELEASE
&& in
->opcode
!= FUSE_READDIR
&&
2459 in
->opcode
!= FUSE_FSYNCDIR
&& in
->opcode
!= FUSE_RELEASEDIR
&&
2460 in
->opcode
!= FUSE_NOTIFY_REPLY
&& in
->opcode
!= FUSE_READDIRPLUS
) {
2465 if (in
->opcode
>= FUSE_MAXOP
|| !fuse_ll_ops
[in
->opcode
].func
) {
2468 if (in
->opcode
!= FUSE_INTERRUPT
) {
2469 struct fuse_req
*intr
;
2470 pthread_mutex_lock(&se
->lock
);
2471 intr
= check_interrupt(se
, req
);
2472 list_add_req(req
, &se
->list
);
2473 pthread_mutex_unlock(&se
->lock
);
2475 fuse_reply_err(intr
, EAGAIN
);
2479 if (in
->opcode
== FUSE_WRITE
&& se
->op
.write_buf
) {
2480 do_write_buf(req
, in
->nodeid
, &iter
, bufv
);
2482 fuse_ll_ops
[in
->opcode
].func(req
, in
->nodeid
, &iter
);
2487 fuse_reply_err(req
, err
);
2490 #define LL_OPTION(n, o, v) \
2492 n, offsetof(struct fuse_session, o), v \
2495 static const struct fuse_opt fuse_ll_opts
[] = {
2496 LL_OPTION("debug", debug
, 1),
2497 LL_OPTION("-d", debug
, 1),
2498 LL_OPTION("--debug", debug
, 1),
2499 LL_OPTION("allow_root", deny_others
, 1),
2500 LL_OPTION("--socket-path=%s", vu_socket_path
, 0),
2501 LL_OPTION("--fd=%d", vu_listen_fd
, 0),
2505 void fuse_lowlevel_version(void)
2507 printf("using FUSE kernel interface version %i.%i\n", FUSE_KERNEL_VERSION
,
2508 FUSE_KERNEL_MINOR_VERSION
);
2511 void fuse_lowlevel_help(void)
2514 * These are not all options, but the ones that are
2515 * potentially of interest to an end-user
2518 " -o allow_root allow access by root\n"
2519 " --socket-path=PATH path for the vhost-user socket\n"
2520 " --fd=FDNUM fd number of vhost-user socket\n");
2523 void fuse_session_destroy(struct fuse_session
*se
)
2525 if (se
->got_init
&& !se
->got_destroy
) {
2526 if (se
->op
.destroy
) {
2527 se
->op
.destroy(se
->userdata
);
2530 pthread_mutex_destroy(&se
->lock
);
2531 free(se
->cuse_data
);
2539 struct fuse_session
*fuse_session_new(struct fuse_args
*args
,
2540 const struct fuse_lowlevel_ops
*op
,
2541 size_t op_size
, void *userdata
)
2543 struct fuse_session
*se
;
2545 if (sizeof(struct fuse_lowlevel_ops
) < op_size
) {
2548 "fuse: warning: library too old, some operations may not work\n");
2549 op_size
= sizeof(struct fuse_lowlevel_ops
);
2552 if (args
->argc
== 0) {
2553 fuse_log(FUSE_LOG_ERR
,
2554 "fuse: empty argv passed to fuse_session_new().\n");
2558 se
= (struct fuse_session
*)calloc(1, sizeof(struct fuse_session
));
2560 fuse_log(FUSE_LOG_ERR
, "fuse: failed to allocate fuse object\n");
2564 se
->vu_listen_fd
= -1;
2565 se
->conn
.max_write
= UINT_MAX
;
2566 se
->conn
.max_readahead
= UINT_MAX
;
2569 if (fuse_opt_parse(args
, se
, fuse_ll_opts
, NULL
) == -1) {
2572 if (args
->argc
== 1 && args
->argv
[0][0] == '-') {
2573 fuse_log(FUSE_LOG_ERR
,
2574 "fuse: warning: argv[0] looks like an option, but "
2575 "will be ignored\n");
2576 } else if (args
->argc
!= 1) {
2578 fuse_log(FUSE_LOG_ERR
, "fuse: unknown option(s): `");
2579 for (i
= 1; i
< args
->argc
- 1; i
++) {
2580 fuse_log(FUSE_LOG_ERR
, "%s ", args
->argv
[i
]);
2582 fuse_log(FUSE_LOG_ERR
, "%s'\n", args
->argv
[i
]);
2586 if (!se
->vu_socket_path
&& se
->vu_listen_fd
< 0) {
2587 fuse_log(FUSE_LOG_ERR
, "fuse: missing --socket-path or --fd option\n");
2590 if (se
->vu_socket_path
&& se
->vu_listen_fd
>= 0) {
2591 fuse_log(FUSE_LOG_ERR
,
2592 "fuse: --socket-path and --fd cannot be given together\n");
2596 se
->bufsize
= FUSE_MAX_MAX_PAGES
* getpagesize() + FUSE_BUFFER_HEADER_SIZE
;
2598 list_init_req(&se
->list
);
2599 list_init_req(&se
->interrupts
);
2600 fuse_mutex_init(&se
->lock
);
2602 memcpy(&se
->op
, op
, op_size
);
2603 se
->owner
= getuid();
2604 se
->userdata
= userdata
;
2609 fuse_opt_free_args(args
);
2616 int fuse_session_mount(struct fuse_session
*se
)
2618 return virtio_session_mount(se
);
2621 int fuse_session_fd(struct fuse_session
*se
)
2626 void fuse_session_unmount(struct fuse_session
*se
)
2630 int fuse_lowlevel_is_virtio(struct fuse_session
*se
)
2632 return !!se
->virtio_dev
;
2636 int fuse_req_getgroups(fuse_req_t req
, int size
, gid_t list
[])
2639 size_t bufsize
= 1024;
2643 unsigned long pid
= req
->ctx
.pid
;
2646 sprintf(path
, "/proc/%lu/task/%lu/status", pid
, pid
);
2649 buf
= malloc(bufsize
);
2655 fd
= open(path
, O_RDONLY
);
2660 ret
= read(fd
, buf
, bufsize
);
2667 if ((size_t)ret
== bufsize
) {
2674 s
= strstr(buf
, "\nGroups:");
2683 unsigned long val
= strtoul(s
, &end
, 0);
2701 * This is currently not implemented on other than Linux...
2703 int fuse_req_getgroups(fuse_req_t req
, int size
, gid_t list
[])
2712 void fuse_session_exit(struct fuse_session
*se
)
2717 void fuse_session_reset(struct fuse_session
*se
)
2723 int fuse_session_exited(struct fuse_session
*se
)