2 * FUSE: Filesystem in Userspace
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 THREAD_POOL_SIZE 64
33 #define OFFSET_MAX 0x7fffffffffffffffLL
35 struct fuse_pollhandle {
37 struct fuse_session *se;
40 static size_t pagesize;
42 static __attribute__((constructor)) void fuse_ll_init_pagesize(void)
44 pagesize = getpagesize();
47 static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr)
49 *attr = (struct fuse_attr){
51 .mode = stbuf->st_mode,
52 .nlink = stbuf->st_nlink,
55 .rdev = stbuf->st_rdev,
56 .size = stbuf->st_size,
57 .blksize = stbuf->st_blksize,
58 .blocks = stbuf->st_blocks,
59 .atime = stbuf->st_atime,
60 .mtime = stbuf->st_mtime,
61 .ctime = stbuf->st_ctime,
62 .atimensec = ST_ATIM_NSEC(stbuf),
63 .mtimensec = ST_MTIM_NSEC(stbuf),
64 .ctimensec = ST_CTIM_NSEC(stbuf),
68 static void convert_attr(const struct fuse_setattr_in *attr, struct stat *stbuf)
70 stbuf->st_mode = attr->mode;
71 stbuf->st_uid = attr->uid;
72 stbuf->st_gid = attr->gid;
73 stbuf->st_size = attr->size;
74 stbuf->st_atime = attr->atime;
75 stbuf->st_mtime = attr->mtime;
76 stbuf->st_ctime = attr->ctime;
77 ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
78 ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
79 ST_CTIM_NSEC_SET(stbuf, attr->ctimensec);
82 static size_t iov_length(const struct iovec *iov, size_t count)
87 for (seg = 0; seg < count; seg++) {
88 ret += iov[seg].iov_len;
93 static void list_init_req(struct fuse_req *req)
99 static void list_del_req(struct fuse_req *req)
101 struct fuse_req *prev = req->prev;
102 struct fuse_req *next = req->next;
107 static void list_add_req(struct fuse_req *req, struct fuse_req *next)
109 struct fuse_req *prev = next->prev;
116 static void destroy_req(fuse_req_t req)
118 pthread_mutex_destroy(&req->lock);
122 void fuse_free_req(fuse_req_t req)
125 struct fuse_session *se = req->se;
127 pthread_mutex_lock(&se->lock);
128 req->u.ni.func = NULL;
129 req->u.ni.data = NULL;
133 pthread_mutex_unlock(&se->lock);
139 static struct fuse_req *fuse_ll_alloc_req(struct fuse_session *se)
141 struct fuse_req *req;
143 req = (struct fuse_req *)calloc(1, sizeof(struct fuse_req));
145 fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate request\n");
150 fuse_mutex_init(&req->lock);
156 /* Send data. If *ch* is NULL, send via session master fd */
157 static int fuse_send_msg(struct fuse_session *se, struct fuse_chan *ch,
158 struct iovec *iov, int count)
160 struct fuse_out_header *out = iov[0].iov_base;
162 out->len = iov_length(iov, count);
163 if (out->unique == 0) {
164 fuse_log(FUSE_LOG_DEBUG, "NOTIFY: code=%d length=%u\n", out->error,
166 } else if (out->error) {
167 fuse_log(FUSE_LOG_DEBUG,
168 " unique: %llu, error: %i (%s), outsize: %i\n",
169 (unsigned long long)out->unique, out->error,
170 strerror(-out->error), out->len);
172 fuse_log(FUSE_LOG_DEBUG, " unique: %llu, success, outsize: %i\n",
173 (unsigned long long)out->unique, out->len);
176 if (fuse_lowlevel_is_virtio(se)) {
177 return virtio_send_msg(se, ch, iov, count);
180 abort(); /* virtio should have taken it before here */
185 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
188 struct fuse_out_header out = {
189 .unique = req->unique,
193 if (error <= -1000 || error > 0) {
194 fuse_log(FUSE_LOG_ERR, "fuse: bad error value: %i\n", error);
198 iov[0].iov_base = &out;
199 iov[0].iov_len = sizeof(struct fuse_out_header);
201 return fuse_send_msg(req->se, req->ch, iov, count);
204 static int send_reply_iov(fuse_req_t req, int error, struct iovec *iov,
209 res = fuse_send_reply_iov_nofree(req, error, iov, count);
214 static int send_reply(fuse_req_t req, int error, const void *arg,
220 iov[1].iov_base = (void *)arg;
221 iov[1].iov_len = argsize;
224 return send_reply_iov(req, error, iov, count);
227 int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
230 struct iovec *padded_iov;
232 padded_iov = malloc((count + 1) * sizeof(struct iovec));
233 if (padded_iov == NULL) {
234 return fuse_reply_err(req, ENOMEM);
237 memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
240 res = send_reply_iov(req, 0, padded_iov, count);
248 * 'buf` is allowed to be empty so that the proper size may be
249 * allocated by the caller
251 size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
252 const char *name, const struct stat *stbuf, off_t off)
257 size_t entlen_padded;
258 struct fuse_dirent *dirent;
260 namelen = strlen(name);
261 entlen = FUSE_NAME_OFFSET + namelen;
262 entlen_padded = FUSE_DIRENT_ALIGN(entlen);
264 if ((buf == NULL) || (entlen_padded > bufsize)) {
265 return entlen_padded;
268 dirent = (struct fuse_dirent *)buf;
269 dirent->ino = stbuf->st_ino;
271 dirent->namelen = namelen;
272 dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
273 memcpy(dirent->name, name, namelen);
274 memset(dirent->name + namelen, 0, entlen_padded - entlen);
276 return entlen_padded;
279 static void convert_statfs(const struct statvfs *stbuf,
280 struct fuse_kstatfs *kstatfs)
282 *kstatfs = (struct fuse_kstatfs){
283 .bsize = stbuf->f_bsize,
284 .frsize = stbuf->f_frsize,
285 .blocks = stbuf->f_blocks,
286 .bfree = stbuf->f_bfree,
287 .bavail = stbuf->f_bavail,
288 .files = stbuf->f_files,
289 .ffree = stbuf->f_ffree,
290 .namelen = stbuf->f_namemax,
294 static int send_reply_ok(fuse_req_t req, const void *arg, size_t argsize)
296 return send_reply(req, 0, arg, argsize);
299 int fuse_reply_err(fuse_req_t req, int err)
301 return send_reply(req, -err, NULL, 0);
304 void fuse_reply_none(fuse_req_t req)
309 static unsigned long calc_timeout_sec(double t)
311 if (t > (double)ULONG_MAX) {
313 } else if (t < 0.0) {
316 return (unsigned long)t;
320 static unsigned int calc_timeout_nsec(double t)
322 double f = t - (double)calc_timeout_sec(t);
325 } else if (f >= 0.999999999) {
328 return (unsigned int)(f * 1.0e9);
332 static void fill_entry(struct fuse_entry_out *arg,
333 const struct fuse_entry_param *e)
335 *arg = (struct fuse_entry_out){
337 .generation = e->generation,
338 .entry_valid = calc_timeout_sec(e->entry_timeout),
339 .entry_valid_nsec = calc_timeout_nsec(e->entry_timeout),
340 .attr_valid = calc_timeout_sec(e->attr_timeout),
341 .attr_valid_nsec = calc_timeout_nsec(e->attr_timeout),
343 convert_stat(&e->attr, &arg->attr);
347 * `buf` is allowed to be empty so that the proper size may be
348 * allocated by the caller
350 size_t fuse_add_direntry_plus(fuse_req_t req, char *buf, size_t bufsize,
352 const struct fuse_entry_param *e, off_t off)
357 size_t entlen_padded;
359 namelen = strlen(name);
360 entlen = FUSE_NAME_OFFSET_DIRENTPLUS + namelen;
361 entlen_padded = FUSE_DIRENT_ALIGN(entlen);
362 if ((buf == NULL) || (entlen_padded > bufsize)) {
363 return entlen_padded;
366 struct fuse_direntplus *dp = (struct fuse_direntplus *)buf;
367 memset(&dp->entry_out, 0, sizeof(dp->entry_out));
368 fill_entry(&dp->entry_out, e);
370 struct fuse_dirent *dirent = &dp->dirent;
371 *dirent = (struct fuse_dirent){
372 .ino = e->attr.st_ino,
375 .type = (e->attr.st_mode & S_IFMT) >> 12,
377 memcpy(dirent->name, name, namelen);
378 memset(dirent->name + namelen, 0, entlen_padded - entlen);
380 return entlen_padded;
383 static void fill_open(struct fuse_open_out *arg, const struct fuse_file_info *f)
387 arg->open_flags |= FOPEN_DIRECT_IO;
390 arg->open_flags |= FOPEN_KEEP_CACHE;
392 if (f->cache_readdir) {
393 arg->open_flags |= FOPEN_CACHE_DIR;
395 if (f->nonseekable) {
396 arg->open_flags |= FOPEN_NONSEEKABLE;
400 int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
402 struct fuse_entry_out arg;
403 size_t size = sizeof(arg);
405 memset(&arg, 0, sizeof(arg));
407 return send_reply_ok(req, &arg, size);
410 int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
411 const struct fuse_file_info *f)
413 char buf[sizeof(struct fuse_entry_out) + sizeof(struct fuse_open_out)];
414 size_t entrysize = sizeof(struct fuse_entry_out);
415 struct fuse_entry_out *earg = (struct fuse_entry_out *)buf;
416 struct fuse_open_out *oarg = (struct fuse_open_out *)(buf + entrysize);
418 memset(buf, 0, sizeof(buf));
421 return send_reply_ok(req, buf, entrysize + sizeof(struct fuse_open_out));
424 int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
427 struct fuse_attr_out arg;
428 size_t size = sizeof(arg);
430 memset(&arg, 0, sizeof(arg));
431 arg.attr_valid = calc_timeout_sec(attr_timeout);
432 arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
433 convert_stat(attr, &arg.attr);
435 return send_reply_ok(req, &arg, size);
438 int fuse_reply_readlink(fuse_req_t req, const char *linkname)
440 return send_reply_ok(req, linkname, strlen(linkname));
443 int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f)
445 struct fuse_open_out arg;
447 memset(&arg, 0, sizeof(arg));
449 return send_reply_ok(req, &arg, sizeof(arg));
452 int fuse_reply_write(fuse_req_t req, size_t count)
454 struct fuse_write_out arg;
456 memset(&arg, 0, sizeof(arg));
459 return send_reply_ok(req, &arg, sizeof(arg));
462 int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
464 return send_reply_ok(req, buf, size);
467 static int fuse_send_data_iov_fallback(struct fuse_session *se,
468 struct fuse_chan *ch, struct iovec *iov,
469 int iov_count, struct fuse_bufvec *buf,
472 /* Optimize common case */
473 if (buf->count == 1 && buf->idx == 0 && buf->off == 0 &&
474 !(buf->buf[0].flags & FUSE_BUF_IS_FD)) {
476 * FIXME: also avoid memory copy if there are multiple buffers
477 * but none of them contain an fd
480 iov[iov_count].iov_base = buf->buf[0].mem;
481 iov[iov_count].iov_len = len;
483 return fuse_send_msg(se, ch, iov, iov_count);
486 if (fuse_lowlevel_is_virtio(se) && buf->count == 1 &&
487 buf->buf[0].flags == (FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK)) {
488 return virtio_send_data_iov(se, ch, iov, iov_count, buf, len);
491 abort(); /* Will have taken vhost path */
495 static int fuse_send_data_iov(struct fuse_session *se, struct fuse_chan *ch,
496 struct iovec *iov, int iov_count,
497 struct fuse_bufvec *buf)
499 size_t len = fuse_buf_size(buf);
501 return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
504 int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv)
507 struct fuse_out_header out = {
508 .unique = req->unique,
512 iov[0].iov_base = &out;
513 iov[0].iov_len = sizeof(struct fuse_out_header);
515 res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv);
520 return fuse_reply_err(req, res);
524 int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
526 struct fuse_statfs_out arg;
527 size_t size = sizeof(arg);
529 memset(&arg, 0, sizeof(arg));
530 convert_statfs(stbuf, &arg.st);
532 return send_reply_ok(req, &arg, size);
535 int fuse_reply_xattr(fuse_req_t req, size_t count)
537 struct fuse_getxattr_out arg;
539 memset(&arg, 0, sizeof(arg));
542 return send_reply_ok(req, &arg, sizeof(arg));
545 int fuse_reply_lock(fuse_req_t req, const struct flock *lock)
547 struct fuse_lk_out arg;
549 memset(&arg, 0, sizeof(arg));
550 arg.lk.type = lock->l_type;
551 if (lock->l_type != F_UNLCK) {
552 arg.lk.start = lock->l_start;
553 if (lock->l_len == 0) {
554 arg.lk.end = OFFSET_MAX;
556 arg.lk.end = lock->l_start + lock->l_len - 1;
559 arg.lk.pid = lock->l_pid;
560 return send_reply_ok(req, &arg, sizeof(arg));
563 int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
565 struct fuse_bmap_out arg;
567 memset(&arg, 0, sizeof(arg));
570 return send_reply_ok(req, &arg, sizeof(arg));
573 static struct fuse_ioctl_iovec *fuse_ioctl_iovec_copy(const struct iovec *iov,
576 struct fuse_ioctl_iovec *fiov;
579 fiov = malloc(sizeof(fiov[0]) * count);
584 for (i = 0; i < count; i++) {
585 fiov[i].base = (uintptr_t)iov[i].iov_base;
586 fiov[i].len = iov[i].iov_len;
592 int fuse_reply_ioctl_retry(fuse_req_t req, const struct iovec *in_iov,
593 size_t in_count, const struct iovec *out_iov,
596 struct fuse_ioctl_out arg;
597 struct fuse_ioctl_iovec *in_fiov = NULL;
598 struct fuse_ioctl_iovec *out_fiov = NULL;
603 memset(&arg, 0, sizeof(arg));
604 arg.flags |= FUSE_IOCTL_RETRY;
605 arg.in_iovs = in_count;
606 arg.out_iovs = out_count;
607 iov[count].iov_base = &arg;
608 iov[count].iov_len = sizeof(arg);
611 /* Can't handle non-compat 64bit ioctls on 32bit */
612 if (sizeof(void *) == 4 && req->ioctl_64bit) {
613 res = fuse_reply_err(req, EINVAL);
618 in_fiov = fuse_ioctl_iovec_copy(in_iov, in_count);
623 iov[count].iov_base = (void *)in_fiov;
624 iov[count].iov_len = sizeof(in_fiov[0]) * in_count;
628 out_fiov = fuse_ioctl_iovec_copy(out_iov, out_count);
633 iov[count].iov_base = (void *)out_fiov;
634 iov[count].iov_len = sizeof(out_fiov[0]) * out_count;
638 res = send_reply_iov(req, 0, iov, count);
646 res = fuse_reply_err(req, ENOMEM);
650 int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size)
652 struct fuse_ioctl_out arg;
656 memset(&arg, 0, sizeof(arg));
658 iov[count].iov_base = &arg;
659 iov[count].iov_len = sizeof(arg);
663 iov[count].iov_base = (char *)buf;
664 iov[count].iov_len = size;
668 return send_reply_iov(req, 0, iov, count);
671 int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
674 struct iovec *padded_iov;
675 struct fuse_ioctl_out arg;
678 padded_iov = malloc((count + 2) * sizeof(struct iovec));
679 if (padded_iov == NULL) {
680 return fuse_reply_err(req, ENOMEM);
683 memset(&arg, 0, sizeof(arg));
685 padded_iov[1].iov_base = &arg;
686 padded_iov[1].iov_len = sizeof(arg);
688 memcpy(&padded_iov[2], iov, count * sizeof(struct iovec));
690 res = send_reply_iov(req, 0, padded_iov, count + 2);
696 int fuse_reply_poll(fuse_req_t req, unsigned revents)
698 struct fuse_poll_out arg;
700 memset(&arg, 0, sizeof(arg));
701 arg.revents = revents;
703 return send_reply_ok(req, &arg, sizeof(arg));
706 int fuse_reply_lseek(fuse_req_t req, off_t off)
708 struct fuse_lseek_out arg;
710 memset(&arg, 0, sizeof(arg));
713 return send_reply_ok(req, &arg, sizeof(arg));
716 static void do_lookup(fuse_req_t req, fuse_ino_t nodeid,
717 struct fuse_mbuf_iter *iter)
719 const char *name = fuse_mbuf_iter_advance_str(iter);
721 fuse_reply_err(req, EINVAL);
725 if (req->se->op.lookup) {
726 req->se->op.lookup(req, nodeid, name);
728 fuse_reply_err(req, ENOSYS);
732 static void do_forget(fuse_req_t req, fuse_ino_t nodeid,
733 struct fuse_mbuf_iter *iter)
735 struct fuse_forget_in *arg;
737 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
739 fuse_reply_err(req, EINVAL);
743 if (req->se->op.forget) {
744 req->se->op.forget(req, nodeid, arg->nlookup);
746 fuse_reply_none(req);
750 static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
751 struct fuse_mbuf_iter *iter)
753 struct fuse_batch_forget_in *arg;
754 struct fuse_forget_data *forgets;
759 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
761 fuse_reply_none(req);
766 * Prevent integer overflow. The compiler emits the following warning
767 * unless we use the scount local variable:
769 * error: comparison is always false due to limited range of data type
770 * [-Werror=type-limits]
772 * This may be true on 64-bit hosts but we need this check for 32-bit
776 if (scount > SIZE_MAX / sizeof(forgets[0])) {
777 fuse_reply_none(req);
781 forgets = fuse_mbuf_iter_advance(iter, arg->count * sizeof(forgets[0]));
783 fuse_reply_none(req);
787 if (req->se->op.forget_multi) {
788 req->se->op.forget_multi(req, arg->count, forgets);
789 } else if (req->se->op.forget) {
792 for (i = 0; i < arg->count; i++) {
793 struct fuse_req *dummy_req;
795 dummy_req = fuse_ll_alloc_req(req->se);
796 if (dummy_req == NULL) {
800 dummy_req->unique = req->unique;
801 dummy_req->ctx = req->ctx;
802 dummy_req->ch = NULL;
804 req->se->op.forget(dummy_req, forgets[i].ino, forgets[i].nlookup);
806 fuse_reply_none(req);
808 fuse_reply_none(req);
812 static void do_getattr(fuse_req_t req, fuse_ino_t nodeid,
813 struct fuse_mbuf_iter *iter)
815 struct fuse_file_info *fip = NULL;
816 struct fuse_file_info fi;
818 struct fuse_getattr_in *arg;
820 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
822 fuse_reply_err(req, EINVAL);
826 if (arg->getattr_flags & FUSE_GETATTR_FH) {
827 memset(&fi, 0, sizeof(fi));
832 if (req->se->op.getattr) {
833 req->se->op.getattr(req, nodeid, fip);
835 fuse_reply_err(req, ENOSYS);
839 static void do_setattr(fuse_req_t req, fuse_ino_t nodeid,
840 struct fuse_mbuf_iter *iter)
842 if (req->se->op.setattr) {
843 struct fuse_setattr_in *arg;
844 struct fuse_file_info *fi = NULL;
845 struct fuse_file_info fi_store;
848 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
850 fuse_reply_err(req, EINVAL);
854 memset(&stbuf, 0, sizeof(stbuf));
855 convert_attr(arg, &stbuf);
856 if (arg->valid & FATTR_FH) {
857 arg->valid &= ~FATTR_FH;
858 memset(&fi_store, 0, sizeof(fi_store));
862 arg->valid &= FUSE_SET_ATTR_MODE | FUSE_SET_ATTR_UID |
863 FUSE_SET_ATTR_GID | FUSE_SET_ATTR_SIZE |
864 FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME |
865 FUSE_SET_ATTR_ATIME_NOW | FUSE_SET_ATTR_MTIME_NOW |
868 req->se->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
870 fuse_reply_err(req, ENOSYS);
874 static void do_access(fuse_req_t req, fuse_ino_t nodeid,
875 struct fuse_mbuf_iter *iter)
877 struct fuse_access_in *arg;
879 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
881 fuse_reply_err(req, EINVAL);
885 if (req->se->op.access) {
886 req->se->op.access(req, nodeid, arg->mask);
888 fuse_reply_err(req, ENOSYS);
892 static void do_readlink(fuse_req_t req, fuse_ino_t nodeid,
893 struct fuse_mbuf_iter *iter)
897 if (req->se->op.readlink) {
898 req->se->op.readlink(req, nodeid);
900 fuse_reply_err(req, ENOSYS);
904 static void do_mknod(fuse_req_t req, fuse_ino_t nodeid,
905 struct fuse_mbuf_iter *iter)
907 struct fuse_mknod_in *arg;
910 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
911 name = fuse_mbuf_iter_advance_str(iter);
913 fuse_reply_err(req, EINVAL);
917 req->ctx.umask = arg->umask;
919 if (req->se->op.mknod) {
920 req->se->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
922 fuse_reply_err(req, ENOSYS);
926 static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid,
927 struct fuse_mbuf_iter *iter)
929 struct fuse_mkdir_in *arg;
932 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
933 name = fuse_mbuf_iter_advance_str(iter);
935 fuse_reply_err(req, EINVAL);
939 req->ctx.umask = arg->umask;
941 if (req->se->op.mkdir) {
942 req->se->op.mkdir(req, nodeid, name, arg->mode);
944 fuse_reply_err(req, ENOSYS);
948 static void do_unlink(fuse_req_t req, fuse_ino_t nodeid,
949 struct fuse_mbuf_iter *iter)
951 const char *name = fuse_mbuf_iter_advance_str(iter);
954 fuse_reply_err(req, EINVAL);
958 if (req->se->op.unlink) {
959 req->se->op.unlink(req, nodeid, name);
961 fuse_reply_err(req, ENOSYS);
965 static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid,
966 struct fuse_mbuf_iter *iter)
968 const char *name = fuse_mbuf_iter_advance_str(iter);
971 fuse_reply_err(req, EINVAL);
975 if (req->se->op.rmdir) {
976 req->se->op.rmdir(req, nodeid, name);
978 fuse_reply_err(req, ENOSYS);
982 static void do_symlink(fuse_req_t req, fuse_ino_t nodeid,
983 struct fuse_mbuf_iter *iter)
985 const char *name = fuse_mbuf_iter_advance_str(iter);
986 const char *linkname = fuse_mbuf_iter_advance_str(iter);
988 if (!name || !linkname) {
989 fuse_reply_err(req, EINVAL);
993 if (req->se->op.symlink) {
994 req->se->op.symlink(req, linkname, nodeid, name);
996 fuse_reply_err(req, ENOSYS);
1000 static void do_rename(fuse_req_t req, fuse_ino_t nodeid,
1001 struct fuse_mbuf_iter *iter)
1003 struct fuse_rename_in *arg;
1004 const char *oldname;
1005 const char *newname;
1007 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1008 oldname = fuse_mbuf_iter_advance_str(iter);
1009 newname = fuse_mbuf_iter_advance_str(iter);
1010 if (!arg || !oldname || !newname) {
1011 fuse_reply_err(req, EINVAL);
1015 if (req->se->op.rename) {
1016 req->se->op.rename(req, nodeid, oldname, arg->newdir, newname, 0);
1018 fuse_reply_err(req, ENOSYS);
1022 static void do_rename2(fuse_req_t req, fuse_ino_t nodeid,
1023 struct fuse_mbuf_iter *iter)
1025 struct fuse_rename2_in *arg;
1026 const char *oldname;
1027 const char *newname;
1029 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1030 oldname = fuse_mbuf_iter_advance_str(iter);
1031 newname = fuse_mbuf_iter_advance_str(iter);
1032 if (!arg || !oldname || !newname) {
1033 fuse_reply_err(req, EINVAL);
1037 if (req->se->op.rename) {
1038 req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
1041 fuse_reply_err(req, ENOSYS);
1045 static void do_link(fuse_req_t req, fuse_ino_t nodeid,
1046 struct fuse_mbuf_iter *iter)
1048 struct fuse_link_in *arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1049 const char *name = fuse_mbuf_iter_advance_str(iter);
1051 if (!arg || !name) {
1052 fuse_reply_err(req, EINVAL);
1056 if (req->se->op.link) {
1057 req->se->op.link(req, arg->oldnodeid, nodeid, name);
1059 fuse_reply_err(req, ENOSYS);
1063 static void do_create(fuse_req_t req, fuse_ino_t nodeid,
1064 struct fuse_mbuf_iter *iter)
1066 if (req->se->op.create) {
1067 struct fuse_create_in *arg;
1068 struct fuse_file_info fi;
1071 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1072 name = fuse_mbuf_iter_advance_str(iter);
1073 if (!arg || !name) {
1074 fuse_reply_err(req, EINVAL);
1078 memset(&fi, 0, sizeof(fi));
1079 fi.flags = arg->flags;
1081 req->ctx.umask = arg->umask;
1083 req->se->op.create(req, nodeid, name, arg->mode, &fi);
1085 fuse_reply_err(req, ENOSYS);
1089 static void do_open(fuse_req_t req, fuse_ino_t nodeid,
1090 struct fuse_mbuf_iter *iter)
1092 struct fuse_open_in *arg;
1093 struct fuse_file_info fi;
1095 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1097 fuse_reply_err(req, EINVAL);
1101 memset(&fi, 0, sizeof(fi));
1102 fi.flags = arg->flags;
1104 if (req->se->op.open) {
1105 req->se->op.open(req, nodeid, &fi);
1107 fuse_reply_open(req, &fi);
1111 static void do_read(fuse_req_t req, fuse_ino_t nodeid,
1112 struct fuse_mbuf_iter *iter)
1114 if (req->se->op.read) {
1115 struct fuse_read_in *arg;
1116 struct fuse_file_info fi;
1118 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1120 fuse_reply_err(req, EINVAL);
1124 memset(&fi, 0, sizeof(fi));
1126 fi.lock_owner = arg->lock_owner;
1127 fi.flags = arg->flags;
1128 req->se->op.read(req, nodeid, arg->size, arg->offset, &fi);
1130 fuse_reply_err(req, ENOSYS);
1134 static void do_write(fuse_req_t req, fuse_ino_t nodeid,
1135 struct fuse_mbuf_iter *iter)
1137 struct fuse_write_in *arg;
1138 struct fuse_file_info fi;
1141 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1143 fuse_reply_err(req, EINVAL);
1147 param = fuse_mbuf_iter_advance(iter, arg->size);
1149 fuse_reply_err(req, EINVAL);
1153 memset(&fi, 0, sizeof(fi));
1155 fi.writepage = (arg->write_flags & FUSE_WRITE_CACHE) != 0;
1156 fi.kill_priv = !!(arg->write_flags & FUSE_WRITE_KILL_PRIV);
1158 fi.lock_owner = arg->lock_owner;
1159 fi.flags = arg->flags;
1161 if (req->se->op.write) {
1162 req->se->op.write(req, nodeid, param, arg->size, arg->offset, &fi);
1164 fuse_reply_err(req, ENOSYS);
1168 static void do_write_buf(fuse_req_t req, fuse_ino_t nodeid,
1169 struct fuse_mbuf_iter *iter, struct fuse_bufvec *ibufv)
1171 struct fuse_session *se = req->se;
1172 struct fuse_bufvec *pbufv = ibufv;
1173 struct fuse_bufvec tmpbufv = {
1174 .buf[0] = ibufv->buf[0],
1177 struct fuse_write_in *arg;
1178 size_t arg_size = sizeof(*arg);
1179 struct fuse_file_info fi;
1181 memset(&fi, 0, sizeof(fi));
1183 arg = fuse_mbuf_iter_advance(iter, arg_size);
1185 fuse_reply_err(req, EINVAL);
1189 fi.lock_owner = arg->lock_owner;
1190 fi.flags = arg->flags;
1192 fi.writepage = !!(arg->write_flags & FUSE_WRITE_CACHE);
1193 fi.kill_priv = !!(arg->write_flags & FUSE_WRITE_KILL_PRIV);
1195 if (ibufv->count == 1) {
1196 assert(!(tmpbufv.buf[0].flags & FUSE_BUF_IS_FD));
1197 tmpbufv.buf[0].mem = ((char *)arg) + arg_size;
1198 tmpbufv.buf[0].size -= sizeof(struct fuse_in_header) + arg_size;
1202 * Input bufv contains the headers in the first element
1203 * and the data in the rest, we need to skip that first element
1205 ibufv->buf[0].size = 0;
1208 if (fuse_buf_size(pbufv) != arg->size) {
1209 fuse_log(FUSE_LOG_ERR,
1210 "fuse: do_write_buf: buffer size doesn't match arg->size\n");
1211 fuse_reply_err(req, EIO);
1215 se->op.write_buf(req, nodeid, pbufv, arg->offset, &fi);
1218 static void do_flush(fuse_req_t req, fuse_ino_t nodeid,
1219 struct fuse_mbuf_iter *iter)
1221 struct fuse_flush_in *arg;
1222 struct fuse_file_info fi;
1224 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1226 fuse_reply_err(req, EINVAL);
1230 memset(&fi, 0, sizeof(fi));
1233 fi.lock_owner = arg->lock_owner;
1235 if (req->se->op.flush) {
1236 req->se->op.flush(req, nodeid, &fi);
1238 fuse_reply_err(req, ENOSYS);
1242 static void do_release(fuse_req_t req, fuse_ino_t nodeid,
1243 struct fuse_mbuf_iter *iter)
1245 struct fuse_release_in *arg;
1246 struct fuse_file_info fi;
1248 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1250 fuse_reply_err(req, EINVAL);
1254 memset(&fi, 0, sizeof(fi));
1255 fi.flags = arg->flags;
1257 fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
1258 fi.lock_owner = arg->lock_owner;
1260 if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
1261 fi.flock_release = 1;
1264 if (req->se->op.release) {
1265 req->se->op.release(req, nodeid, &fi);
1267 fuse_reply_err(req, 0);
1271 static void do_fsync(fuse_req_t req, fuse_ino_t nodeid,
1272 struct fuse_mbuf_iter *iter)
1274 struct fuse_fsync_in *arg;
1275 struct fuse_file_info fi;
1278 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1280 fuse_reply_err(req, EINVAL);
1283 datasync = arg->fsync_flags & 1;
1285 memset(&fi, 0, sizeof(fi));
1288 if (req->se->op.fsync) {
1289 if (fi.fh == (uint64_t)-1) {
1290 req->se->op.fsync(req, nodeid, datasync, NULL);
1292 req->se->op.fsync(req, nodeid, datasync, &fi);
1295 fuse_reply_err(req, ENOSYS);
1299 static void do_opendir(fuse_req_t req, fuse_ino_t nodeid,
1300 struct fuse_mbuf_iter *iter)
1302 struct fuse_open_in *arg;
1303 struct fuse_file_info fi;
1305 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1307 fuse_reply_err(req, EINVAL);
1311 memset(&fi, 0, sizeof(fi));
1312 fi.flags = arg->flags;
1314 if (req->se->op.opendir) {
1315 req->se->op.opendir(req, nodeid, &fi);
1317 fuse_reply_open(req, &fi);
1321 static void do_readdir(fuse_req_t req, fuse_ino_t nodeid,
1322 struct fuse_mbuf_iter *iter)
1324 struct fuse_read_in *arg;
1325 struct fuse_file_info fi;
1327 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1329 fuse_reply_err(req, EINVAL);
1333 memset(&fi, 0, sizeof(fi));
1336 if (req->se->op.readdir) {
1337 req->se->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
1339 fuse_reply_err(req, ENOSYS);
1343 static void do_readdirplus(fuse_req_t req, fuse_ino_t nodeid,
1344 struct fuse_mbuf_iter *iter)
1346 struct fuse_read_in *arg;
1347 struct fuse_file_info fi;
1349 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1351 fuse_reply_err(req, EINVAL);
1355 memset(&fi, 0, sizeof(fi));
1358 if (req->se->op.readdirplus) {
1359 req->se->op.readdirplus(req, nodeid, arg->size, arg->offset, &fi);
1361 fuse_reply_err(req, ENOSYS);
1365 static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid,
1366 struct fuse_mbuf_iter *iter)
1368 struct fuse_release_in *arg;
1369 struct fuse_file_info fi;
1371 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1373 fuse_reply_err(req, EINVAL);
1377 memset(&fi, 0, sizeof(fi));
1378 fi.flags = arg->flags;
1381 if (req->se->op.releasedir) {
1382 req->se->op.releasedir(req, nodeid, &fi);
1384 fuse_reply_err(req, 0);
1388 static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid,
1389 struct fuse_mbuf_iter *iter)
1391 struct fuse_fsync_in *arg;
1392 struct fuse_file_info fi;
1395 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1397 fuse_reply_err(req, EINVAL);
1400 datasync = arg->fsync_flags & 1;
1402 memset(&fi, 0, sizeof(fi));
1405 if (req->se->op.fsyncdir) {
1406 req->se->op.fsyncdir(req, nodeid, datasync, &fi);
1408 fuse_reply_err(req, ENOSYS);
1412 static void do_statfs(fuse_req_t req, fuse_ino_t nodeid,
1413 struct fuse_mbuf_iter *iter)
1418 if (req->se->op.statfs) {
1419 req->se->op.statfs(req, nodeid);
1421 struct statvfs buf = {
1425 fuse_reply_statfs(req, &buf);
1429 static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid,
1430 struct fuse_mbuf_iter *iter)
1432 struct fuse_setxattr_in *arg;
1436 arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
1437 name = fuse_mbuf_iter_advance_str(iter);
1438 if (!arg || !name) {
1439 fuse_reply_err(req, EINVAL);
1443 value = fuse_mbuf_iter_advance(iter, arg->size);
1445 fuse_reply_err(req, EINVAL);
1449 if (req->se->op.setxattr) {
1450 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;
1992 #ifdef HAVE_VMSPLICE
1993 se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
1995 se->conn.capable |= FUSE_CAP_SPLICE_READ;
1997 se->conn.capable |= FUSE_CAP_IOCTL_DIR;
2000 * Default settings for modern filesystems.
2002 * Most of these capabilities were disabled by default in
2003 * libfuse2 for backwards compatibility reasons. In libfuse3,
2004 * we can finally enable them by default (as long as they're
2005 * supported by the kernel).
2007 #define LL_SET_DEFAULT(cond, cap) \
2008 if ((cond) && (se->conn.capable & (cap))) \
2009 se->conn.want |= (cap)
2010 LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ);
2011 LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS);
2012 LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA);
2013 LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV);
2014 LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO);
2015 LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR);
2016 LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC);
2017 LL_SET_DEFAULT(se->op.write_buf, FUSE_CAP_SPLICE_READ);
2018 LL_SET_DEFAULT(se->op.getlk && se->op.setlk, FUSE_CAP_POSIX_LOCKS);
2019 LL_SET_DEFAULT(se->op.flock, FUSE_CAP_FLOCK_LOCKS);
2020 LL_SET_DEFAULT(se->op.readdirplus, FUSE_CAP_READDIRPLUS);
2021 LL_SET_DEFAULT(se->op.readdirplus && se->op.readdir,
2022 FUSE_CAP_READDIRPLUS_AUTO);
2023 se->conn.time_gran = 1;
2025 if (bufsize < FUSE_MIN_READ_BUFFER) {
2026 fuse_log(FUSE_LOG_ERR, "fuse: warning: buffer size too small: %zu\n",
2028 bufsize = FUSE_MIN_READ_BUFFER;
2030 se->bufsize = bufsize;
2032 if (se->conn.max_write > bufsize - FUSE_BUFFER_HEADER_SIZE) {
2033 se->conn.max_write = bufsize - FUSE_BUFFER_HEADER_SIZE;
2037 se->got_destroy = 0;
2039 se->op.init(se->userdata, &se->conn);
2042 if (se->conn.want & (~se->conn.capable)) {
2043 fuse_log(FUSE_LOG_ERR,
2044 "fuse: error: filesystem requested capabilities "
2045 "0x%x that are not supported by kernel, aborting.\n",
2046 se->conn.want & (~se->conn.capable));
2047 fuse_reply_err(req, EPROTO);
2048 se->error = -EPROTO;
2049 fuse_session_exit(se);
2053 if (se->conn.max_write < bufsize - FUSE_BUFFER_HEADER_SIZE) {
2054 se->bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
2056 if (arg->flags & FUSE_MAX_PAGES) {
2057 outarg.flags |= FUSE_MAX_PAGES;
2058 outarg.max_pages = (se->conn.max_write - 1) / getpagesize() + 1;
2062 * Always enable big writes, this is superseded
2063 * by the max_write option
2065 outarg.flags |= FUSE_BIG_WRITES;
2067 if (se->conn.want & FUSE_CAP_ASYNC_READ) {
2068 outarg.flags |= FUSE_ASYNC_READ;
2070 if (se->conn.want & FUSE_CAP_PARALLEL_DIROPS) {
2071 outarg.flags |= FUSE_PARALLEL_DIROPS;
2073 if (se->conn.want & FUSE_CAP_POSIX_LOCKS) {
2074 outarg.flags |= FUSE_POSIX_LOCKS;
2076 if (se->conn.want & FUSE_CAP_ATOMIC_O_TRUNC) {
2077 outarg.flags |= FUSE_ATOMIC_O_TRUNC;
2079 if (se->conn.want & FUSE_CAP_EXPORT_SUPPORT) {
2080 outarg.flags |= FUSE_EXPORT_SUPPORT;
2082 if (se->conn.want & FUSE_CAP_DONT_MASK) {
2083 outarg.flags |= FUSE_DONT_MASK;
2085 if (se->conn.want & FUSE_CAP_FLOCK_LOCKS) {
2086 outarg.flags |= FUSE_FLOCK_LOCKS;
2088 if (se->conn.want & FUSE_CAP_AUTO_INVAL_DATA) {
2089 outarg.flags |= FUSE_AUTO_INVAL_DATA;
2091 if (se->conn.want & FUSE_CAP_READDIRPLUS) {
2092 outarg.flags |= FUSE_DO_READDIRPLUS;
2094 if (se->conn.want & FUSE_CAP_READDIRPLUS_AUTO) {
2095 outarg.flags |= FUSE_READDIRPLUS_AUTO;
2097 if (se->conn.want & FUSE_CAP_ASYNC_DIO) {
2098 outarg.flags |= FUSE_ASYNC_DIO;
2100 if (se->conn.want & FUSE_CAP_WRITEBACK_CACHE) {
2101 outarg.flags |= FUSE_WRITEBACK_CACHE;
2103 if (se->conn.want & FUSE_CAP_POSIX_ACL) {
2104 outarg.flags |= FUSE_POSIX_ACL;
2106 outarg.max_readahead = se->conn.max_readahead;
2107 outarg.max_write = se->conn.max_write;
2108 if (se->conn.max_background >= (1 << 16)) {
2109 se->conn.max_background = (1 << 16) - 1;
2111 if (se->conn.congestion_threshold > se->conn.max_background) {
2112 se->conn.congestion_threshold = se->conn.max_background;
2114 if (!se->conn.congestion_threshold) {
2115 se->conn.congestion_threshold = se->conn.max_background * 3 / 4;
2118 outarg.max_background = se->conn.max_background;
2119 outarg.congestion_threshold = se->conn.congestion_threshold;
2120 outarg.time_gran = se->conn.time_gran;
2122 fuse_log(FUSE_LOG_DEBUG, " INIT: %u.%u\n", outarg.major, outarg.minor);
2123 fuse_log(FUSE_LOG_DEBUG, " flags=0x%08x\n", outarg.flags);
2124 fuse_log(FUSE_LOG_DEBUG, " max_readahead=0x%08x\n", outarg.max_readahead);
2125 fuse_log(FUSE_LOG_DEBUG, " max_write=0x%08x\n", outarg.max_write);
2126 fuse_log(FUSE_LOG_DEBUG, " max_background=%i\n", outarg.max_background);
2127 fuse_log(FUSE_LOG_DEBUG, " congestion_threshold=%i\n",
2128 outarg.congestion_threshold);
2129 fuse_log(FUSE_LOG_DEBUG, " time_gran=%u\n", outarg.time_gran);
2131 send_reply_ok(req, &outarg, outargsize);
2134 static void do_destroy(fuse_req_t req, fuse_ino_t nodeid,
2135 struct fuse_mbuf_iter *iter)
2137 struct fuse_session *se = req->se;
2142 se->got_destroy = 1;
2144 if (se->op.destroy) {
2145 se->op.destroy(se->userdata);
2148 send_reply_ok(req, NULL, 0);
2151 static int send_notify_iov(struct fuse_session *se, int notify_code,
2152 struct iovec *iov, int count)
2154 struct fuse_out_header out = {
2155 .error = notify_code,
2158 if (!se->got_init) {
2162 iov[0].iov_base = &out;
2163 iov[0].iov_len = sizeof(struct fuse_out_header);
2165 return fuse_send_msg(se, NULL, iov, count);
2168 int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
2171 struct fuse_notify_poll_wakeup_out outarg = {
2174 struct iovec iov[2];
2176 iov[1].iov_base = &outarg;
2177 iov[1].iov_len = sizeof(outarg);
2179 return send_notify_iov(ph->se, FUSE_NOTIFY_POLL, iov, 2);
2185 int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino,
2186 off_t off, off_t len)
2188 struct fuse_notify_inval_inode_out outarg = {
2193 struct iovec iov[2];
2199 iov[1].iov_base = &outarg;
2200 iov[1].iov_len = sizeof(outarg);
2202 return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2);
2205 int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent,
2206 const char *name, size_t namelen)
2208 struct fuse_notify_inval_entry_out outarg = {
2212 struct iovec iov[3];
2218 iov[1].iov_base = &outarg;
2219 iov[1].iov_len = sizeof(outarg);
2220 iov[2].iov_base = (void *)name;
2221 iov[2].iov_len = namelen + 1;
2223 return send_notify_iov(se, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
2226 int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
2227 fuse_ino_t child, const char *name,
2230 struct fuse_notify_delete_out outarg = {
2235 struct iovec iov[3];
2241 iov[1].iov_base = &outarg;
2242 iov[1].iov_len = sizeof(outarg);
2243 iov[2].iov_base = (void *)name;
2244 iov[2].iov_len = namelen + 1;
2246 return send_notify_iov(se, FUSE_NOTIFY_DELETE, iov, 3);
2249 int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
2250 off_t offset, struct fuse_bufvec *bufv)
2252 struct fuse_out_header out = {
2253 .error = FUSE_NOTIFY_STORE,
2255 struct fuse_notify_store_out outarg = {
2258 .size = fuse_buf_size(bufv),
2260 struct iovec iov[3];
2267 iov[0].iov_base = &out;
2268 iov[0].iov_len = sizeof(out);
2269 iov[1].iov_base = &outarg;
2270 iov[1].iov_len = sizeof(outarg);
2272 res = fuse_send_data_iov(se, NULL, iov, 2, bufv);
2280 void *fuse_req_userdata(fuse_req_t req)
2282 return req->se->userdata;
2285 const struct fuse_ctx *fuse_req_ctx(fuse_req_t req)
2290 void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
2293 pthread_mutex_lock(&req->lock);
2294 pthread_mutex_lock(&req->se->lock);
2295 req->u.ni.func = func;
2296 req->u.ni.data = data;
2297 pthread_mutex_unlock(&req->se->lock);
2298 if (req->interrupted && func) {
2301 pthread_mutex_unlock(&req->lock);
2304 int fuse_req_interrupted(fuse_req_t req)
2308 pthread_mutex_lock(&req->se->lock);
2309 interrupted = req->interrupted;
2310 pthread_mutex_unlock(&req->se->lock);
2316 void (*func)(fuse_req_t, fuse_ino_t, struct fuse_mbuf_iter *);
2319 [FUSE_LOOKUP] = { do_lookup, "LOOKUP" },
2320 [FUSE_FORGET] = { do_forget, "FORGET" },
2321 [FUSE_GETATTR] = { do_getattr, "GETATTR" },
2322 [FUSE_SETATTR] = { do_setattr, "SETATTR" },
2323 [FUSE_READLINK] = { do_readlink, "READLINK" },
2324 [FUSE_SYMLINK] = { do_symlink, "SYMLINK" },
2325 [FUSE_MKNOD] = { do_mknod, "MKNOD" },
2326 [FUSE_MKDIR] = { do_mkdir, "MKDIR" },
2327 [FUSE_UNLINK] = { do_unlink, "UNLINK" },
2328 [FUSE_RMDIR] = { do_rmdir, "RMDIR" },
2329 [FUSE_RENAME] = { do_rename, "RENAME" },
2330 [FUSE_LINK] = { do_link, "LINK" },
2331 [FUSE_OPEN] = { do_open, "OPEN" },
2332 [FUSE_READ] = { do_read, "READ" },
2333 [FUSE_WRITE] = { do_write, "WRITE" },
2334 [FUSE_STATFS] = { do_statfs, "STATFS" },
2335 [FUSE_RELEASE] = { do_release, "RELEASE" },
2336 [FUSE_FSYNC] = { do_fsync, "FSYNC" },
2337 [FUSE_SETXATTR] = { do_setxattr, "SETXATTR" },
2338 [FUSE_GETXATTR] = { do_getxattr, "GETXATTR" },
2339 [FUSE_LISTXATTR] = { do_listxattr, "LISTXATTR" },
2340 [FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" },
2341 [FUSE_FLUSH] = { do_flush, "FLUSH" },
2342 [FUSE_INIT] = { do_init, "INIT" },
2343 [FUSE_OPENDIR] = { do_opendir, "OPENDIR" },
2344 [FUSE_READDIR] = { do_readdir, "READDIR" },
2345 [FUSE_RELEASEDIR] = { do_releasedir, "RELEASEDIR" },
2346 [FUSE_FSYNCDIR] = { do_fsyncdir, "FSYNCDIR" },
2347 [FUSE_GETLK] = { do_getlk, "GETLK" },
2348 [FUSE_SETLK] = { do_setlk, "SETLK" },
2349 [FUSE_SETLKW] = { do_setlkw, "SETLKW" },
2350 [FUSE_ACCESS] = { do_access, "ACCESS" },
2351 [FUSE_CREATE] = { do_create, "CREATE" },
2352 [FUSE_INTERRUPT] = { do_interrupt, "INTERRUPT" },
2353 [FUSE_BMAP] = { do_bmap, "BMAP" },
2354 [FUSE_IOCTL] = { do_ioctl, "IOCTL" },
2355 [FUSE_POLL] = { do_poll, "POLL" },
2356 [FUSE_FALLOCATE] = { do_fallocate, "FALLOCATE" },
2357 [FUSE_DESTROY] = { do_destroy, "DESTROY" },
2358 [FUSE_NOTIFY_REPLY] = { NULL, "NOTIFY_REPLY" },
2359 [FUSE_BATCH_FORGET] = { do_batch_forget, "BATCH_FORGET" },
2360 [FUSE_READDIRPLUS] = { do_readdirplus, "READDIRPLUS" },
2361 [FUSE_RENAME2] = { do_rename2, "RENAME2" },
2362 [FUSE_COPY_FILE_RANGE] = { do_copy_file_range, "COPY_FILE_RANGE" },
2363 [FUSE_LSEEK] = { do_lseek, "LSEEK" },
2366 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
2368 static const char *opname(enum fuse_opcode opcode)
2370 if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name) {
2373 return fuse_ll_ops[opcode].name;
2377 void fuse_session_process_buf(struct fuse_session *se,
2378 const struct fuse_buf *buf)
2380 struct fuse_bufvec bufv = { .buf[0] = *buf, .count = 1 };
2381 fuse_session_process_buf_int(se, &bufv, NULL);
2386 * bufv is normally a single entry buffer, except for a write
2387 * where (if it's in memory) then the bufv may be multiple entries,
2388 * where the first entry contains all headers and subsequent entries
2390 * bufv shall not use any offsets etc to make the data anything
2391 * other than contiguous starting from 0.
2393 void fuse_session_process_buf_int(struct fuse_session *se,
2394 struct fuse_bufvec *bufv,
2395 struct fuse_chan *ch)
2397 const struct fuse_buf *buf = bufv->buf;
2398 struct fuse_mbuf_iter iter = FUSE_MBUF_ITER_INIT(buf);
2399 struct fuse_in_header *in;
2400 struct fuse_req *req;
2403 /* The first buffer must be a memory buffer */
2404 assert(!(buf->flags & FUSE_BUF_IS_FD));
2406 in = fuse_mbuf_iter_advance(&iter, sizeof(*in));
2407 assert(in); /* caller guarantees the input buffer is large enough */
2411 "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
2412 (unsigned long long)in->unique, opname((enum fuse_opcode)in->opcode),
2413 in->opcode, (unsigned long long)in->nodeid, buf->size, in->pid);
2415 req = fuse_ll_alloc_req(se);
2417 struct fuse_out_header out = {
2418 .unique = in->unique,
2421 struct iovec iov = {
2423 .iov_len = sizeof(struct fuse_out_header),
2426 fuse_send_msg(se, ch, &iov, 1);
2430 req->unique = in->unique;
2431 req->ctx.uid = in->uid;
2432 req->ctx.gid = in->gid;
2433 req->ctx.pid = in->pid;
2437 * INIT and DESTROY requests are serialized, all other request types
2438 * run in parallel. This prevents races between FUSE_INIT and ordinary
2439 * requests, FUSE_INIT and FUSE_INIT, FUSE_INIT and FUSE_DESTROY, and
2440 * FUSE_DESTROY and FUSE_DESTROY.
2442 if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT ||
2443 in->opcode == FUSE_DESTROY) {
2444 pthread_rwlock_wrlock(&se->init_rwlock);
2446 pthread_rwlock_rdlock(&se->init_rwlock);
2450 if (!se->got_init) {
2451 enum fuse_opcode expected;
2453 expected = se->cuse_data ? CUSE_INIT : FUSE_INIT;
2454 if (in->opcode != expected) {
2457 } else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT) {
2458 if (fuse_lowlevel_is_virtio(se)) {
2460 * TODO: This is after a hard reboot typically, we need to do
2461 * a destroy, but we can't reply to this request yet so
2462 * we can't use do_destroy
2464 fuse_log(FUSE_LOG_DEBUG, "%s: reinit\n", __func__);
2465 se->got_destroy = 1;
2467 if (se->op.destroy) {
2468 se->op.destroy(se->userdata);
2476 /* Implement -o allow_root */
2477 if (se->deny_others && in->uid != se->owner && in->uid != 0 &&
2478 in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
2479 in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
2480 in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
2481 in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR &&
2482 in->opcode != FUSE_NOTIFY_REPLY && in->opcode != FUSE_READDIRPLUS) {
2487 if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func) {
2490 if (in->opcode != FUSE_INTERRUPT) {
2491 struct fuse_req *intr;
2492 pthread_mutex_lock(&se->lock);
2493 intr = check_interrupt(se, req);
2494 list_add_req(req, &se->list);
2495 pthread_mutex_unlock(&se->lock);
2497 fuse_reply_err(intr, EAGAIN);
2501 if (in->opcode == FUSE_WRITE && se->op.write_buf) {
2502 do_write_buf(req, in->nodeid, &iter, bufv);
2504 fuse_ll_ops[in->opcode].func(req, in->nodeid, &iter);
2507 pthread_rwlock_unlock(&se->init_rwlock);
2511 fuse_reply_err(req, err);
2512 pthread_rwlock_unlock(&se->init_rwlock);
2515 #define LL_OPTION(n, o, v) \
2517 n, offsetof(struct fuse_session, o), v \
2520 static const struct fuse_opt fuse_ll_opts[] = {
2521 LL_OPTION("debug", debug, 1),
2522 LL_OPTION("-d", debug, 1),
2523 LL_OPTION("--debug", debug, 1),
2524 LL_OPTION("allow_root", deny_others, 1),
2525 LL_OPTION("--socket-path=%s", vu_socket_path, 0),
2526 LL_OPTION("--fd=%d", vu_listen_fd, 0),
2527 LL_OPTION("--thread-pool-size=%d", thread_pool_size, 0),
2531 void fuse_lowlevel_version(void)
2533 printf("using FUSE kernel interface version %i.%i\n", FUSE_KERNEL_VERSION,
2534 FUSE_KERNEL_MINOR_VERSION);
2537 void fuse_lowlevel_help(void)
2540 * These are not all options, but the ones that are
2541 * potentially of interest to an end-user
2544 " -o allow_root allow access by root\n"
2545 " --socket-path=PATH path for the vhost-user socket\n"
2546 " --fd=FDNUM fd number of vhost-user socket\n"
2547 " --thread-pool-size=NUM thread pool size limit (default %d)\n",
2551 void fuse_session_destroy(struct fuse_session *se)
2553 if (se->got_init && !se->got_destroy) {
2554 if (se->op.destroy) {
2555 se->op.destroy(se->userdata);
2558 pthread_rwlock_destroy(&se->init_rwlock);
2559 pthread_mutex_destroy(&se->lock);
2560 free(se->cuse_data);
2565 if (fuse_lowlevel_is_virtio(se)) {
2566 virtio_session_close(se);
2569 free(se->vu_socket_path);
2570 se->vu_socket_path = NULL;
2576 struct fuse_session *fuse_session_new(struct fuse_args *args,
2577 const struct fuse_lowlevel_ops *op,
2578 size_t op_size, void *userdata)
2580 struct fuse_session *se;
2582 if (sizeof(struct fuse_lowlevel_ops) < op_size) {
2585 "fuse: warning: library too old, some operations may not work\n");
2586 op_size = sizeof(struct fuse_lowlevel_ops);
2589 if (args->argc == 0) {
2590 fuse_log(FUSE_LOG_ERR,
2591 "fuse: empty argv passed to fuse_session_new().\n");
2595 se = (struct fuse_session *)calloc(1, sizeof(struct fuse_session));
2597 fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate fuse object\n");
2601 se->vu_listen_fd = -1;
2602 se->thread_pool_size = THREAD_POOL_SIZE;
2603 se->conn.max_write = UINT_MAX;
2604 se->conn.max_readahead = UINT_MAX;
2607 if (fuse_opt_parse(args, se, fuse_ll_opts, NULL) == -1) {
2610 if (args->argc == 1 && args->argv[0][0] == '-') {
2611 fuse_log(FUSE_LOG_ERR,
2612 "fuse: warning: argv[0] looks like an option, but "
2613 "will be ignored\n");
2614 } else if (args->argc != 1) {
2616 fuse_log(FUSE_LOG_ERR, "fuse: unknown option(s): `");
2617 for (i = 1; i < args->argc - 1; i++) {
2618 fuse_log(FUSE_LOG_ERR, "%s ", args->argv[i]);
2620 fuse_log(FUSE_LOG_ERR, "%s'\n", args->argv[i]);
2624 if (!se->vu_socket_path && se->vu_listen_fd < 0) {
2625 fuse_log(FUSE_LOG_ERR, "fuse: missing --socket-path or --fd option\n");
2628 if (se->vu_socket_path && se->vu_listen_fd >= 0) {
2629 fuse_log(FUSE_LOG_ERR,
2630 "fuse: --socket-path and --fd cannot be given together\n");
2634 se->bufsize = FUSE_MAX_MAX_PAGES * getpagesize() + FUSE_BUFFER_HEADER_SIZE;
2636 list_init_req(&se->list);
2637 list_init_req(&se->interrupts);
2638 fuse_mutex_init(&se->lock);
2639 pthread_rwlock_init(&se->init_rwlock, NULL);
2641 memcpy(&se->op, op, op_size);
2642 se->owner = getuid();
2643 se->userdata = userdata;
2648 fuse_opt_free_args(args);
2655 int fuse_session_mount(struct fuse_session *se)
2657 return virtio_session_mount(se);
2660 int fuse_session_fd(struct fuse_session *se)
2665 void fuse_session_unmount(struct fuse_session *se)
2669 int fuse_lowlevel_is_virtio(struct fuse_session *se)
2671 return !!se->virtio_dev;
2674 void fuse_session_exit(struct fuse_session *se)
2679 void fuse_session_reset(struct fuse_session *se)
2685 int fuse_session_exited(struct fuse_session *se)