16 #include "fuse_kernel.h" 18 #include "fuse_misc.h" 19 #include "mount_util.h" 31 #ifndef F_LINUX_SPECIFIC_BASE 32 #define F_LINUX_SPECIFIC_BASE 1024 35 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7) 39 #define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg))) 40 #define OFFSET_MAX 0x7fffffffffffffffLL 42 #define container_of(ptr, type, member) ({ \ 43 const typeof( ((type *)0)->member ) *__mptr = (ptr); \ 44 (type *)( (char *)__mptr - offsetof(type,member) );}) 46 struct fuse_pollhandle {
48 struct fuse_session *se;
51 static size_t pagesize;
53 static __attribute__((constructor))
void fuse_ll_init_pagesize(
void)
55 pagesize = getpagesize();
58 static void convert_stat(
const struct stat *stbuf,
struct fuse_attr *attr)
60 attr->ino = stbuf->st_ino;
61 attr->mode = stbuf->st_mode;
62 attr->nlink = stbuf->st_nlink;
63 attr->uid = stbuf->st_uid;
64 attr->gid = stbuf->st_gid;
65 attr->rdev = stbuf->st_rdev;
66 attr->size = stbuf->st_size;
67 attr->blksize = stbuf->st_blksize;
68 attr->blocks = stbuf->st_blocks;
69 attr->atime = stbuf->st_atime;
70 attr->mtime = stbuf->st_mtime;
71 attr->ctime = stbuf->st_ctime;
72 attr->atimensec = ST_ATIM_NSEC(stbuf);
73 attr->mtimensec = ST_MTIM_NSEC(stbuf);
74 attr->ctimensec = ST_CTIM_NSEC(stbuf);
77 static void convert_attr(
const struct fuse_setattr_in *attr,
struct stat *stbuf)
79 stbuf->st_mode = attr->mode;
80 stbuf->st_uid = attr->uid;
81 stbuf->st_gid = attr->gid;
82 stbuf->st_size = attr->size;
83 stbuf->st_atime = attr->atime;
84 stbuf->st_mtime = attr->mtime;
85 stbuf->st_ctime = attr->ctime;
86 ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
87 ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
88 ST_CTIM_NSEC_SET(stbuf, attr->ctimensec);
91 static size_t iov_length(
const struct iovec *iov,
size_t count)
96 for (seg = 0; seg < count; seg++)
97 ret += iov[seg].iov_len;
101 static void list_init_req(
struct fuse_req *req)
107 static void list_del_req(
struct fuse_req *req)
109 struct fuse_req *prev = req->prev;
110 struct fuse_req *next = req->next;
115 static void list_add_req(
struct fuse_req *req,
struct fuse_req *next)
117 struct fuse_req *prev = next->prev;
126 pthread_mutex_destroy(&req->lock);
133 struct fuse_session *se = req->se;
135 pthread_mutex_lock(&se->lock);
136 req->u.ni.func = NULL;
137 req->u.ni.data = NULL;
140 fuse_chan_put(req->ch);
142 pthread_mutex_unlock(&se->lock);
147 static struct fuse_req *fuse_ll_alloc_req(
struct fuse_session *se)
149 struct fuse_req *req;
151 req = (
struct fuse_req *) calloc(1,
sizeof(
struct fuse_req));
153 fuse_log(FUSE_LOG_ERR,
"fuse: failed to allocate request\n");
158 fuse_mutex_init(&req->lock);
165 static int fuse_send_msg(
struct fuse_session *se,
struct fuse_chan *ch,
166 struct iovec *iov,
int count)
168 struct fuse_out_header *out = iov[0].iov_base;
171 out->len = iov_length(iov, count);
173 if (out->unique == 0) {
174 fuse_log(FUSE_LOG_DEBUG,
"NOTIFY: code=%d length=%u\n",
175 out->error, out->len);
176 }
else if (out->error) {
178 " unique: %llu, error: %i (%s), outsize: %i\n",
179 (
unsigned long long) out->unique, out->error,
180 strerror(-out->error), out->len);
183 " unique: %llu, success, outsize: %i\n",
184 (
unsigned long long) out->unique, out->len);
188 ssize_t res = writev(ch ? ch->fd : se->fd,
195 perror(
"fuse: writing device");
203 int fuse_send_reply_iov_nofree(
fuse_req_t req,
int error,
struct iovec *iov,
206 struct fuse_out_header out;
208 if (error <= -1000 || error > 0) {
209 fuse_log(FUSE_LOG_ERR,
"fuse: bad error value: %i\n", error);
213 out.unique = req->unique;
216 iov[0].iov_base = &out;
217 iov[0].iov_len =
sizeof(
struct fuse_out_header);
219 return fuse_send_msg(req->se, req->ch, iov, count);
222 static int send_reply_iov(
fuse_req_t req,
int error,
struct iovec *iov,
227 res = fuse_send_reply_iov_nofree(req, error, iov, count);
232 static int send_reply(
fuse_req_t req,
int error,
const void *arg,
238 iov[1].iov_base = (
void *) arg;
239 iov[1].iov_len = argsize;
242 return send_reply_iov(req, error, iov, count);
248 struct iovec *padded_iov;
250 padded_iov = malloc((count + 1) *
sizeof(
struct iovec));
251 if (padded_iov == NULL)
254 memcpy(padded_iov + 1, iov, count *
sizeof(
struct iovec));
257 res = send_reply_iov(req, 0, padded_iov, count);
267 const char *name,
const struct stat *stbuf, off_t off)
272 size_t entlen_padded;
273 struct fuse_dirent *dirent;
275 namelen = strlen(name);
276 entlen = FUSE_NAME_OFFSET + namelen;
277 entlen_padded = FUSE_DIRENT_ALIGN(entlen);
279 if ((buf == NULL) || (entlen_padded > bufsize))
280 return entlen_padded;
282 dirent = (
struct fuse_dirent*) buf;
283 dirent->ino = stbuf->st_ino;
285 dirent->namelen = namelen;
286 dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
287 memcpy(dirent->name, name, namelen);
288 memset(dirent->name + namelen, 0, entlen_padded - entlen);
290 return entlen_padded;
293 static void convert_statfs(
const struct statvfs *stbuf,
294 struct fuse_kstatfs *kstatfs)
296 kstatfs->bsize = stbuf->f_bsize;
297 kstatfs->frsize = stbuf->f_frsize;
298 kstatfs->blocks = stbuf->f_blocks;
299 kstatfs->bfree = stbuf->f_bfree;
300 kstatfs->bavail = stbuf->f_bavail;
301 kstatfs->files = stbuf->f_files;
302 kstatfs->ffree = stbuf->f_ffree;
303 kstatfs->namelen = stbuf->f_namemax;
306 static int send_reply_ok(
fuse_req_t req,
const void *arg,
size_t argsize)
308 return send_reply(req, 0, arg, argsize);
313 return send_reply(req, -err, NULL, 0);
321 static unsigned long calc_timeout_sec(
double t)
323 if (t > (
double) ULONG_MAX)
328 return (
unsigned long) t;
331 static unsigned int calc_timeout_nsec(
double t)
333 double f = t - (double) calc_timeout_sec(t);
336 else if (f >= 0.999999999)
339 return (
unsigned int) (f * 1.0e9);
342 static void fill_entry(
struct fuse_entry_out *arg,
345 arg->nodeid = e->
ino;
350 arg->attr_valid_nsec = calc_timeout_nsec(e->
attr_timeout);
351 convert_stat(&e->
attr, &arg->attr);
363 size_t entlen_padded;
365 namelen = strlen(name);
366 entlen = FUSE_NAME_OFFSET_DIRENTPLUS + namelen;
367 entlen_padded = FUSE_DIRENT_ALIGN(entlen);
368 if ((buf == NULL) || (entlen_padded > bufsize))
369 return entlen_padded;
371 struct fuse_direntplus *dp = (
struct fuse_direntplus *) buf;
372 memset(&dp->entry_out, 0,
sizeof(dp->entry_out));
373 fill_entry(&dp->entry_out, e);
375 struct fuse_dirent *dirent = &dp->dirent;
376 dirent->ino = e->
attr.st_ino;
378 dirent->namelen = namelen;
379 dirent->type = (e->
attr.st_mode & S_IFMT) >> 12;
380 memcpy(dirent->name, name, namelen);
381 memset(dirent->name + namelen, 0, entlen_padded - entlen);
383 return entlen_padded;
386 static void fill_open(
struct fuse_open_out *arg,
391 arg->open_flags |= FOPEN_DIRECT_IO;
393 arg->open_flags |= FOPEN_KEEP_CACHE;
395 arg->open_flags |= FOPEN_CACHE_DIR;
397 arg->open_flags |= FOPEN_NONSEEKABLE;
402 struct fuse_entry_out arg;
403 size_t size = req->se->conn.proto_minor < 9 ?
404 FUSE_COMPAT_ENTRY_OUT_SIZE :
sizeof(arg);
408 if (!e->
ino && req->se->conn.proto_minor < 4)
411 memset(&arg, 0,
sizeof(arg));
413 return send_reply_ok(req, &arg, size);
419 char buf[
sizeof(
struct fuse_entry_out) + sizeof(struct fuse_open_out)];
420 size_t entrysize = req->se->conn.proto_minor < 9 ?
421 FUSE_COMPAT_ENTRY_OUT_SIZE :
sizeof(
struct fuse_entry_out);
422 struct fuse_entry_out *earg = (
struct fuse_entry_out *) buf;
423 struct fuse_open_out *oarg = (
struct fuse_open_out *) (buf + entrysize);
425 memset(buf, 0,
sizeof(buf));
428 return send_reply_ok(req, buf,
429 entrysize +
sizeof(
struct fuse_open_out));
435 struct fuse_attr_out arg;
436 size_t size = req->se->conn.proto_minor < 9 ?
437 FUSE_COMPAT_ATTR_OUT_SIZE :
sizeof(arg);
439 memset(&arg, 0,
sizeof(arg));
440 arg.attr_valid = calc_timeout_sec(attr_timeout);
441 arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
442 convert_stat(attr, &arg.attr);
444 return send_reply_ok(req, &arg, size);
449 return send_reply_ok(req, linkname, strlen(linkname));
454 struct fuse_open_out arg;
456 memset(&arg, 0,
sizeof(arg));
458 return send_reply_ok(req, &arg,
sizeof(arg));
463 struct fuse_write_out arg;
465 memset(&arg, 0,
sizeof(arg));
468 return send_reply_ok(req, &arg,
sizeof(arg));
473 return send_reply_ok(req, buf, size);
476 static int fuse_send_data_iov_fallback(
struct fuse_session *se,
477 struct fuse_chan *ch,
478 struct iovec *iov,
int iov_count,
482 struct fuse_bufvec mem_buf = FUSE_BUFVEC_INIT(len);
487 if (buf->
count == 1 && buf->
idx == 0 && buf->
off == 0 &&
492 iov[iov_count].iov_base = buf->
buf[0].
mem;
493 iov[iov_count].iov_len = len;
495 return fuse_send_msg(se, ch, iov, iov_count);
498 res = posix_memalign(&mbuf, pagesize, len);
502 mem_buf.
buf[0].
mem = mbuf;
510 iov[iov_count].iov_base = mbuf;
511 iov[iov_count].iov_len = len;
513 res = fuse_send_msg(se, ch, iov, iov_count);
519 struct fuse_ll_pipe {
525 static void fuse_ll_pipe_free(
struct fuse_ll_pipe *llp)
533 #if !defined(HAVE_PIPE2) || !defined(O_CLOEXEC) 534 static int fuse_pipe(
int fds[2])
541 if (fcntl(fds[0], F_SETFL, O_NONBLOCK) == -1 ||
542 fcntl(fds[1], F_SETFL, O_NONBLOCK) == -1 ||
543 fcntl(fds[0], F_SETFD, FD_CLOEXEC) == -1 ||
544 fcntl(fds[1], F_SETFD, FD_CLOEXEC) == -1) {
552 static int fuse_pipe(
int fds[2])
554 return pipe2(fds, O_CLOEXEC | O_NONBLOCK);
558 static struct fuse_ll_pipe *fuse_ll_get_pipe(
struct fuse_session *se)
560 struct fuse_ll_pipe *llp = pthread_getspecific(se->pipe_key);
564 llp = malloc(
sizeof(
struct fuse_ll_pipe));
568 res = fuse_pipe(llp->pipe);
577 llp->size = pagesize * 16;
580 pthread_setspecific(se->pipe_key, llp);
587 static void fuse_ll_clear_pipe(
struct fuse_session *se)
589 struct fuse_ll_pipe *llp = pthread_getspecific(se->pipe_key);
591 pthread_setspecific(se->pipe_key, NULL);
592 fuse_ll_pipe_free(llp);
596 #if defined(HAVE_SPLICE) && defined(HAVE_VMSPLICE) 597 static int read_back(
int fd,
char *buf,
size_t len)
601 res = read(fd, buf, len);
603 fuse_log(FUSE_LOG_ERR,
"fuse: internal error: failed to read back from pipe: %s\n", strerror(errno));
607 fuse_log(FUSE_LOG_ERR,
"fuse: internal error: short read back from pipe: %i from %zi\n", res, len);
613 static int grow_pipe_to_max(
int pipefd)
620 maxfd = open(
"/proc/sys/fs/pipe-max-size", O_RDONLY);
624 res = read(maxfd, buf,
sizeof(buf) - 1);
636 res = fcntl(pipefd, F_SETPIPE_SZ, max);
642 static int fuse_send_data_iov(
struct fuse_session *se,
struct fuse_chan *ch,
643 struct iovec *iov,
int iov_count,
648 struct fuse_out_header *out = iov[0].iov_base;
649 struct fuse_ll_pipe *llp;
652 size_t total_buf_size;
655 struct fuse_bufvec pipe_buf = FUSE_BUFVEC_INIT(len);
657 if (se->broken_splice_nonblock)
664 for (idx = buf->
idx; idx < buf->count; idx++) {
667 total_buf_size -= buf->
off;
669 if (total_buf_size < 2 * pagesize)
672 if (se->conn.proto_minor < 14 ||
676 llp = fuse_ll_get_pipe(se);
681 headerlen = iov_length(iov, iov_count);
683 out->len = headerlen + len;
689 pipesize = pagesize * (iov_count + buf->
count + 1) + out->len;
691 if (llp->size < pipesize) {
693 res = fcntl(llp->pipe[0], F_SETPIPE_SZ, pipesize);
695 res = grow_pipe_to_max(llp->pipe[0]);
703 if (llp->size < pipesize)
708 res = vmsplice(llp->pipe[1], iov, iov_count, SPLICE_F_NONBLOCK);
712 if (res != headerlen) {
714 fuse_log(FUSE_LOG_ERR,
"fuse: short vmsplice to pipe: %u/%zu\n", res,
720 pipe_buf.
buf[0].
fd = llp->pipe[1];
725 if (res == -EAGAIN || res == -EINVAL) {
737 se->broken_splice_nonblock = 1;
739 pthread_setspecific(se->pipe_key, NULL);
740 fuse_ll_pipe_free(llp);
747 if (res != 0 && res < len) {
748 struct fuse_bufvec mem_buf = FUSE_BUFVEC_INIT(len);
750 size_t now_len = res;
760 res = posix_memalign(&mbuf, pagesize, len);
764 mem_buf.
buf[0].
mem = mbuf;
765 mem_buf.
off = now_len;
769 size_t extra_len = res;
775 tmpbuf = malloc(headerlen);
776 if (tmpbuf == NULL) {
781 res = read_back(llp->pipe[0], tmpbuf, headerlen);
787 res = read_back(llp->pipe[0], mbuf, now_len);
792 len = now_len + extra_len;
793 iov[iov_count].iov_base = mbuf;
794 iov[iov_count].iov_len = len;
796 res = fuse_send_msg(se, ch, iov, iov_count);
804 out->len = headerlen + len;
808 " unique: %llu, success, outsize: %i (splice)\n",
809 (
unsigned long long) out->unique, out->len);
815 splice_flags |= SPLICE_F_MOVE;
817 res = splice(llp->pipe[0], NULL, ch ? ch->fd : se->fd,
818 NULL, out->len, splice_flags);
821 perror(
"fuse: splice from pipe");
824 if (res != out->len) {
826 fuse_log(FUSE_LOG_ERR,
"fuse: short splice from pipe: %u/%u\n",
833 fuse_ll_clear_pipe(se);
837 return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
840 static int fuse_send_data_iov(
struct fuse_session *se,
struct fuse_chan *ch,
841 struct iovec *iov,
int iov_count,
847 return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
855 struct fuse_out_header out;
858 iov[0].iov_base = &out;
859 iov[0].iov_len =
sizeof(
struct fuse_out_header);
861 out.unique = req->unique;
864 res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv, flags);
875 struct fuse_statfs_out arg;
876 size_t size = req->se->conn.proto_minor < 4 ?
877 FUSE_COMPAT_STATFS_SIZE :
sizeof(arg);
879 memset(&arg, 0,
sizeof(arg));
880 convert_statfs(stbuf, &arg.st);
882 return send_reply_ok(req, &arg, size);
887 struct fuse_getxattr_out arg;
889 memset(&arg, 0,
sizeof(arg));
892 return send_reply_ok(req, &arg,
sizeof(arg));
897 struct fuse_lk_out arg;
899 memset(&arg, 0,
sizeof(arg));
900 arg.lk.type = lock->l_type;
901 if (lock->l_type != F_UNLCK) {
902 arg.lk.start = lock->l_start;
903 if (lock->l_len == 0)
904 arg.lk.end = OFFSET_MAX;
906 arg.lk.end = lock->l_start + lock->l_len - 1;
908 arg.lk.pid = lock->l_pid;
909 return send_reply_ok(req, &arg,
sizeof(arg));
914 struct fuse_bmap_out arg;
916 memset(&arg, 0,
sizeof(arg));
919 return send_reply_ok(req, &arg,
sizeof(arg));
922 static struct fuse_ioctl_iovec *fuse_ioctl_iovec_copy(
const struct iovec *iov,
925 struct fuse_ioctl_iovec *fiov;
928 fiov = malloc(
sizeof(fiov[0]) * count);
932 for (i = 0; i < count; i++) {
933 fiov[i].base = (uintptr_t) iov[i].iov_base;
934 fiov[i].len = iov[i].iov_len;
941 const struct iovec *in_iov,
size_t in_count,
942 const struct iovec *out_iov,
size_t out_count)
944 struct fuse_ioctl_out arg;
945 struct fuse_ioctl_iovec *in_fiov = NULL;
946 struct fuse_ioctl_iovec *out_fiov = NULL;
951 memset(&arg, 0,
sizeof(arg));
952 arg.flags |= FUSE_IOCTL_RETRY;
953 arg.in_iovs = in_count;
954 arg.out_iovs = out_count;
955 iov[count].iov_base = &arg;
956 iov[count].iov_len =
sizeof(arg);
959 if (req->se->conn.proto_minor < 16) {
961 iov[count].iov_base = (
void *)in_iov;
962 iov[count].iov_len =
sizeof(in_iov[0]) * in_count;
967 iov[count].iov_base = (
void *)out_iov;
968 iov[count].iov_len =
sizeof(out_iov[0]) * out_count;
973 if (
sizeof(
void *) == 4 && req->ioctl_64bit) {
979 in_fiov = fuse_ioctl_iovec_copy(in_iov, in_count);
983 iov[count].iov_base = (
void *)in_fiov;
984 iov[count].iov_len =
sizeof(in_fiov[0]) * in_count;
988 out_fiov = fuse_ioctl_iovec_copy(out_iov, out_count);
992 iov[count].iov_base = (
void *)out_fiov;
993 iov[count].iov_len =
sizeof(out_fiov[0]) * out_count;
998 res = send_reply_iov(req, 0, iov, count);
1012 struct fuse_ioctl_out arg;
1013 struct iovec iov[3];
1016 memset(&arg, 0,
sizeof(arg));
1017 arg.result = result;
1018 iov[count].iov_base = &arg;
1019 iov[count].iov_len =
sizeof(arg);
1023 iov[count].iov_base = (
char *) buf;
1024 iov[count].iov_len = size;
1028 return send_reply_iov(req, 0, iov, count);
1034 struct iovec *padded_iov;
1035 struct fuse_ioctl_out arg;
1038 padded_iov = malloc((count + 2) *
sizeof(
struct iovec));
1039 if (padded_iov == NULL)
1042 memset(&arg, 0,
sizeof(arg));
1043 arg.result = result;
1044 padded_iov[1].iov_base = &arg;
1045 padded_iov[1].iov_len =
sizeof(arg);
1047 memcpy(&padded_iov[2], iov, count *
sizeof(
struct iovec));
1049 res = send_reply_iov(req, 0, padded_iov, count + 2);
1057 struct fuse_poll_out arg;
1059 memset(&arg, 0,
sizeof(arg));
1060 arg.revents = revents;
1062 return send_reply_ok(req, &arg,
sizeof(arg));
1067 struct fuse_lseek_out arg;
1069 memset(&arg, 0,
sizeof(arg));
1072 return send_reply_ok(req, &arg,
sizeof(arg));
1077 char *name = (
char *) inarg;
1079 if (req->se->op.lookup)
1080 req->se->op.lookup(req, nodeid, name);
1087 struct fuse_forget_in *arg = (
struct fuse_forget_in *) inarg;
1089 if (req->se->op.forget)
1090 req->se->op.forget(req, nodeid, arg->nlookup);
1098 struct fuse_batch_forget_in *arg = (
void *) inarg;
1099 struct fuse_forget_one *param = (
void *) PARAM(arg);
1104 if (req->se->op.forget_multi) {
1105 req->se->op.forget_multi(req, arg->count,
1106 (
struct fuse_forget_data *) param);
1107 }
else if (req->se->op.forget) {
1108 for (i = 0; i < arg->count; i++) {
1109 struct fuse_forget_one *forget = ¶m[i];
1110 struct fuse_req *dummy_req;
1112 dummy_req = fuse_ll_alloc_req(req->se);
1113 if (dummy_req == NULL)
1116 dummy_req->unique = req->unique;
1117 dummy_req->ctx = req->ctx;
1118 dummy_req->ch = NULL;
1120 req->se->op.forget(dummy_req, forget->nodeid,
1134 if (req->se->conn.proto_minor >= 9) {
1135 struct fuse_getattr_in *arg = (
struct fuse_getattr_in *) inarg;
1137 if (arg->getattr_flags & FUSE_GETATTR_FH) {
1138 memset(&fi, 0,
sizeof(fi));
1144 if (req->se->op.getattr)
1145 req->se->op.getattr(req, nodeid, fip);
1152 struct fuse_setattr_in *arg = (
struct fuse_setattr_in *) inarg;
1154 if (req->se->op.setattr) {
1158 memset(&stbuf, 0,
sizeof(stbuf));
1159 convert_attr(arg, &stbuf);
1160 if (arg->valid & FATTR_FH) {
1161 arg->valid &= ~FATTR_FH;
1162 memset(&fi_store, 0,
sizeof(fi_store));
1167 FUSE_SET_ATTR_MODE |
1170 FUSE_SET_ATTR_SIZE |
1171 FUSE_SET_ATTR_ATIME |
1172 FUSE_SET_ATTR_MTIME |
1173 FUSE_SET_ATTR_ATIME_NOW |
1174 FUSE_SET_ATTR_MTIME_NOW |
1175 FUSE_SET_ATTR_CTIME;
1177 req->se->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
1184 struct fuse_access_in *arg = (
struct fuse_access_in *) inarg;
1186 if (req->se->op.access)
1187 req->se->op.access(req, nodeid, arg->mask);
1196 if (req->se->op.readlink)
1197 req->se->op.readlink(req, nodeid);
1204 struct fuse_mknod_in *arg = (
struct fuse_mknod_in *) inarg;
1205 char *name = PARAM(arg);
1207 if (req->se->conn.proto_minor >= 12)
1208 req->ctx.umask = arg->umask;
1210 name = (
char *) inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
1212 if (req->se->op.mknod)
1213 req->se->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
1220 struct fuse_mkdir_in *arg = (
struct fuse_mkdir_in *) inarg;
1222 if (req->se->conn.proto_minor >= 12)
1223 req->ctx.umask = arg->umask;
1225 if (req->se->op.mkdir)
1226 req->se->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
1233 char *name = (
char *) inarg;
1235 if (req->se->op.unlink)
1236 req->se->op.unlink(req, nodeid, name);
1243 char *name = (
char *) inarg;
1245 if (req->se->op.rmdir)
1246 req->se->op.rmdir(req, nodeid, name);
1253 char *name = (
char *) inarg;
1254 char *linkname = ((
char *) inarg) + strlen((
char *) inarg) + 1;
1256 if (req->se->op.symlink)
1257 req->se->op.symlink(req, linkname, nodeid, name);
1264 struct fuse_rename_in *arg = (
struct fuse_rename_in *) inarg;
1265 char *oldname = PARAM(arg);
1266 char *newname = oldname + strlen(oldname) + 1;
1268 if (req->se->op.rename)
1269 req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
1277 struct fuse_rename2_in *arg = (
struct fuse_rename2_in *) inarg;
1278 char *oldname = PARAM(arg);
1279 char *newname = oldname + strlen(oldname) + 1;
1281 if (req->se->op.rename)
1282 req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
1290 struct fuse_link_in *arg = (
struct fuse_link_in *) inarg;
1292 if (req->se->op.link)
1293 req->se->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
1300 struct fuse_create_in *arg = (
struct fuse_create_in *) inarg;
1302 if (req->se->op.create) {
1304 char *name = PARAM(arg);
1306 memset(&fi, 0,
sizeof(fi));
1307 fi.
flags = arg->flags;
1309 if (req->se->conn.proto_minor >= 12)
1310 req->ctx.umask = arg->umask;
1312 name = (
char *) inarg +
sizeof(
struct fuse_open_in);
1314 req->se->op.create(req, nodeid, name, arg->mode, &fi);
1321 struct fuse_open_in *arg = (
struct fuse_open_in *) inarg;
1324 memset(&fi, 0,
sizeof(fi));
1325 fi.
flags = arg->flags;
1327 if (req->se->op.open)
1328 req->se->op.open(req, nodeid, &fi);
1335 struct fuse_read_in *arg = (
struct fuse_read_in *) inarg;
1337 if (req->se->op.read) {
1340 memset(&fi, 0,
sizeof(fi));
1342 if (req->se->conn.proto_minor >= 9) {
1344 fi.
flags = arg->flags;
1346 req->se->op.read(req, nodeid, arg->size, arg->offset, &fi);
1353 struct fuse_write_in *arg = (
struct fuse_write_in *) inarg;
1357 memset(&fi, 0,
sizeof(fi));
1359 fi.
writepage = (arg->write_flags & FUSE_WRITE_CACHE) != 0;
1361 if (req->se->conn.proto_minor < 9) {
1362 param = ((
char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
1365 fi.
flags = arg->flags;
1369 if (req->se->op.write)
1370 req->se->op.write(req, nodeid, param, arg->size,
1379 struct fuse_session *se = req->se;
1384 struct fuse_write_in *arg = (
struct fuse_write_in *) inarg;
1387 memset(&fi, 0,
sizeof(fi));
1389 fi.
writepage = arg->write_flags & FUSE_WRITE_CACHE;
1391 if (se->conn.proto_minor < 9) {
1392 bufv.
buf[0].
mem = ((
char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
1393 bufv.
buf[0].
size -=
sizeof(
struct fuse_in_header) +
1394 FUSE_COMPAT_WRITE_IN_SIZE;
1398 fi.
flags = arg->flags;
1400 bufv.
buf[0].
mem = PARAM(arg);
1402 bufv.
buf[0].
size -=
sizeof(
struct fuse_in_header) +
1403 sizeof(struct fuse_write_in);
1405 if (bufv.
buf[0].
size < arg->size) {
1406 fuse_log(FUSE_LOG_ERR,
"fuse: do_write_buf: buffer size too small\n");
1412 se->op.write_buf(req, nodeid, &bufv, arg->offset, &fi);
1417 fuse_ll_clear_pipe(se);
1422 struct fuse_flush_in *arg = (
struct fuse_flush_in *) inarg;
1425 memset(&fi, 0,
sizeof(fi));
1428 if (req->se->conn.proto_minor >= 7)
1431 if (req->se->op.flush)
1432 req->se->op.flush(req, nodeid, &fi);
1439 struct fuse_release_in *arg = (
struct fuse_release_in *) inarg;
1442 memset(&fi, 0,
sizeof(fi));
1443 fi.
flags = arg->flags;
1445 if (req->se->conn.proto_minor >= 8) {
1446 fi.
flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
1449 if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
1450 fi.flock_release = 1;
1454 if (req->se->op.release)
1455 req->se->op.release(req, nodeid, &fi);
1462 struct fuse_fsync_in *arg = (
struct fuse_fsync_in *) inarg;
1464 int datasync = arg->fsync_flags & 1;
1466 memset(&fi, 0,
sizeof(fi));
1469 if (req->se->op.fsync)
1470 req->se->op.fsync(req, nodeid, datasync, &fi);
1477 struct fuse_open_in *arg = (
struct fuse_open_in *) inarg;
1480 memset(&fi, 0,
sizeof(fi));
1481 fi.
flags = arg->flags;
1483 if (req->se->op.opendir)
1484 req->se->op.opendir(req, nodeid, &fi);
1491 struct fuse_read_in *arg = (
struct fuse_read_in *) inarg;
1494 memset(&fi, 0,
sizeof(fi));
1497 if (req->se->op.readdir)
1498 req->se->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
1505 struct fuse_read_in *arg = (
struct fuse_read_in *) inarg;
1508 memset(&fi, 0,
sizeof(fi));
1511 if (req->se->op.readdirplus)
1512 req->se->op.readdirplus(req, nodeid, arg->size, arg->offset, &fi);
1519 struct fuse_release_in *arg = (
struct fuse_release_in *) inarg;
1522 memset(&fi, 0,
sizeof(fi));
1523 fi.
flags = arg->flags;
1526 if (req->se->op.releasedir)
1527 req->se->op.releasedir(req, nodeid, &fi);
1534 struct fuse_fsync_in *arg = (
struct fuse_fsync_in *) inarg;
1536 int datasync = arg->fsync_flags & 1;
1538 memset(&fi, 0,
sizeof(fi));
1541 if (req->se->op.fsyncdir)
1542 req->se->op.fsyncdir(req, nodeid, datasync, &fi);
1552 if (req->se->op.statfs)
1553 req->se->op.statfs(req, nodeid);
1555 struct statvfs buf = {
1565 struct fuse_setxattr_in *arg = (
struct fuse_setxattr_in *) inarg;
1566 char *name = PARAM(arg);
1567 char *value = name + strlen(name) + 1;
1569 if (req->se->op.setxattr)
1570 req->se->op.setxattr(req, nodeid, name, value, arg->size,
1578 struct fuse_getxattr_in *arg = (
struct fuse_getxattr_in *) inarg;
1580 if (req->se->op.getxattr)
1581 req->se->op.getxattr(req, nodeid, PARAM(arg), arg->size);
1588 struct fuse_getxattr_in *arg = (
struct fuse_getxattr_in *) inarg;
1590 if (req->se->op.listxattr)
1591 req->se->op.listxattr(req, nodeid, arg->size);
1598 char *name = (
char *) inarg;
1600 if (req->se->op.removexattr)
1601 req->se->op.removexattr(req, nodeid, name);
1606 static void convert_fuse_file_lock(
struct fuse_file_lock *fl,
1607 struct flock *flock)
1609 memset(flock, 0,
sizeof(
struct flock));
1610 flock->l_type = fl->type;
1611 flock->l_whence = SEEK_SET;
1612 flock->l_start = fl->start;
1613 if (fl->end == OFFSET_MAX)
1616 flock->l_len = fl->end - fl->start + 1;
1617 flock->l_pid = fl->pid;
1622 struct fuse_lk_in *arg = (
struct fuse_lk_in *) inarg;
1626 memset(&fi, 0,
sizeof(fi));
1630 convert_fuse_file_lock(&arg->lk, &flock);
1631 if (req->se->op.getlk)
1632 req->se->op.getlk(req, nodeid, &fi, &flock);
1638 const void *inarg,
int sleep)
1640 struct fuse_lk_in *arg = (
struct fuse_lk_in *) inarg;
1644 memset(&fi, 0,
sizeof(fi));
1648 if (arg->lk_flags & FUSE_LK_FLOCK) {
1651 switch (arg->lk.type) {
1665 if (req->se->op.flock)
1666 req->se->op.flock(req, nodeid, &fi, op);
1670 convert_fuse_file_lock(&arg->lk, &flock);
1671 if (req->se->op.setlk)
1672 req->se->op.setlk(req, nodeid, &fi, &flock, sleep);
1680 do_setlk_common(req, nodeid, inarg, 0);
1685 do_setlk_common(req, nodeid, inarg, 1);
1688 static int find_interrupted(
struct fuse_session *se,
struct fuse_req *req)
1690 struct fuse_req *curr;
1692 for (curr = se->list.next; curr != &se->list; curr = curr->next) {
1693 if (curr->unique == req->u.i.unique) {
1698 pthread_mutex_unlock(&se->lock);
1701 pthread_mutex_lock(&curr->lock);
1702 pthread_mutex_lock(&se->lock);
1703 curr->interrupted = 1;
1704 func = curr->u.ni.func;
1705 data = curr->u.ni.data;
1706 pthread_mutex_unlock(&se->lock);
1709 pthread_mutex_unlock(&curr->lock);
1711 pthread_mutex_lock(&se->lock);
1719 for (curr = se->interrupts.next; curr != &se->interrupts;
1720 curr = curr->next) {
1721 if (curr->u.i.unique == req->u.i.unique)
1729 struct fuse_interrupt_in *arg = (
struct fuse_interrupt_in *) inarg;
1730 struct fuse_session *se = req->se;
1734 fuse_log(FUSE_LOG_DEBUG,
"INTERRUPT: %llu\n",
1735 (
unsigned long long) arg->unique);
1737 req->u.i.unique = arg->unique;
1739 pthread_mutex_lock(&se->lock);
1740 if (find_interrupted(se, req))
1743 list_add_req(req, &se->interrupts);
1744 pthread_mutex_unlock(&se->lock);
1747 static struct fuse_req *check_interrupt(
struct fuse_session *se,
1748 struct fuse_req *req)
1750 struct fuse_req *curr;
1752 for (curr = se->interrupts.next; curr != &se->interrupts;
1753 curr = curr->next) {
1754 if (curr->u.i.unique == req->unique) {
1755 req->interrupted = 1;
1761 curr = se->interrupts.next;
1762 if (curr != &se->interrupts) {
1764 list_init_req(curr);
1772 struct fuse_bmap_in *arg = (
struct fuse_bmap_in *) inarg;
1774 if (req->se->op.bmap)
1775 req->se->op.bmap(req, nodeid, arg->blocksize, arg->block);
1782 struct fuse_ioctl_in *arg = (
struct fuse_ioctl_in *) inarg;
1783 unsigned int flags = arg->flags;
1784 void *in_buf = arg->in_size ? PARAM(arg) : NULL;
1787 if (flags & FUSE_IOCTL_DIR &&
1793 memset(&fi, 0,
sizeof(fi));
1796 if (
sizeof(
void *) == 4 && req->se->conn.proto_minor >= 16 &&
1797 !(flags & FUSE_IOCTL_32BIT)) {
1798 req->ioctl_64bit = 1;
1801 if (req->se->op.ioctl)
1802 req->se->op.ioctl(req, nodeid, arg->cmd,
1803 (
void *)(uintptr_t)arg->arg, &fi, flags,
1804 in_buf, arg->in_size, arg->out_size);
1816 struct fuse_poll_in *arg = (
struct fuse_poll_in *) inarg;
1819 memset(&fi, 0,
sizeof(fi));
1823 if (req->se->op.poll) {
1824 struct fuse_pollhandle *ph = NULL;
1826 if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
1827 ph = malloc(
sizeof(
struct fuse_pollhandle));
1836 req->se->op.poll(req, nodeid, &fi, ph);
1844 struct fuse_fallocate_in *arg = (
struct fuse_fallocate_in *) inarg;
1847 memset(&fi, 0,
sizeof(fi));
1850 if (req->se->op.fallocate)
1851 req->se->op.fallocate(req, nodeid, arg->mode, arg->offset, arg->length, &fi);
1858 struct fuse_copy_file_range_in *arg = (
struct fuse_copy_file_range_in *) inarg;
1861 memset(&fi_in, 0,
sizeof(fi_in));
1862 fi_in.fh = arg->fh_in;
1864 memset(&fi_out, 0,
sizeof(fi_out));
1865 fi_out.fh = arg->fh_out;
1868 if (req->se->op.copy_file_range)
1869 req->se->op.copy_file_range(req, nodeid_in, arg->off_in,
1870 &fi_in, arg->nodeid_out,
1871 arg->off_out, &fi_out, arg->len,
1879 struct fuse_lseek_in *arg = (
struct fuse_lseek_in *) inarg;
1882 memset(&fi, 0,
sizeof(fi));
1885 if (req->se->op.lseek)
1886 req->se->op.lseek(req, nodeid, arg->offset, arg->whence, &fi);
1893 struct fuse_init_in *arg = (
struct fuse_init_in *) inarg;
1894 struct fuse_init_out outarg;
1895 struct fuse_session *se = req->se;
1896 size_t bufsize = se->bufsize;
1897 size_t outargsize =
sizeof(outarg);
1901 fuse_log(FUSE_LOG_DEBUG,
"INIT: %u.%u\n", arg->major, arg->minor);
1902 if (arg->major == 7 && arg->minor >= 6) {
1903 fuse_log(FUSE_LOG_DEBUG,
"flags=0x%08x\n", arg->flags);
1904 fuse_log(FUSE_LOG_DEBUG,
"max_readahead=0x%08x\n",
1905 arg->max_readahead);
1908 se->conn.proto_major = arg->major;
1909 se->conn.proto_minor = arg->minor;
1910 se->conn.capable = 0;
1913 memset(&outarg, 0,
sizeof(outarg));
1914 outarg.major = FUSE_KERNEL_VERSION;
1915 outarg.minor = FUSE_KERNEL_MINOR_VERSION;
1917 if (arg->major < 7) {
1918 fuse_log(FUSE_LOG_ERR,
"fuse: unsupported protocol version: %u.%u\n",
1919 arg->major, arg->minor);
1924 if (arg->major > 7) {
1926 send_reply_ok(req, &outarg,
sizeof(outarg));
1930 if (arg->minor >= 6) {
1931 if (arg->max_readahead < se->conn.max_readahead)
1932 se->conn.max_readahead = arg->max_readahead;
1933 if (arg->flags & FUSE_ASYNC_READ)
1935 if (arg->flags & FUSE_POSIX_LOCKS)
1937 if (arg->flags & FUSE_ATOMIC_O_TRUNC)
1939 if (arg->flags & FUSE_EXPORT_SUPPORT)
1941 if (arg->flags & FUSE_DONT_MASK)
1943 if (arg->flags & FUSE_FLOCK_LOCKS)
1945 if (arg->flags & FUSE_AUTO_INVAL_DATA)
1947 if (arg->flags & FUSE_DO_READDIRPLUS)
1949 if (arg->flags & FUSE_READDIRPLUS_AUTO)
1951 if (arg->flags & FUSE_ASYNC_DIO)
1953 if (arg->flags & FUSE_WRITEBACK_CACHE)
1955 if (arg->flags & FUSE_NO_OPEN_SUPPORT)
1957 if (arg->flags & FUSE_PARALLEL_DIROPS)
1959 if (arg->flags & FUSE_POSIX_ACL)
1961 if (arg->flags & FUSE_HANDLE_KILLPRIV)
1963 if (arg->flags & FUSE_NO_OPENDIR_SUPPORT)
1965 if (arg->flags & FUSE_EXPLICIT_INVAL_DATA)
1967 if (!(arg->flags & FUSE_MAX_PAGES)) {
1968 size_t max_bufsize =
1969 FUSE_DEFAULT_MAX_PAGES_PER_REQ * getpagesize()
1970 + FUSE_BUFFER_HEADER_SIZE;
1971 if (bufsize > max_bufsize) {
1972 bufsize = max_bufsize;
1976 se->conn.max_readahead = 0;
1979 if (se->conn.proto_minor >= 14) {
1981 #ifdef HAVE_VMSPLICE 1987 if (se->conn.proto_minor >= 18)
1997 #define LL_SET_DEFAULT(cond, cap) \ 1998 if ((cond) && (se->conn.capable & (cap))) \ 1999 se->conn.want |= (cap) 2008 LL_SET_DEFAULT(se->op.getlk && se->op.setlk,
2012 LL_SET_DEFAULT(se->op.readdirplus && se->op.readdir,
2014 se->conn.time_gran = 1;
2016 if (bufsize < FUSE_MIN_READ_BUFFER) {
2017 fuse_log(FUSE_LOG_ERR,
"fuse: warning: buffer size too small: %zu\n",
2019 bufsize = FUSE_MIN_READ_BUFFER;
2021 se->bufsize = bufsize;
2023 if (se->conn.max_write > bufsize - FUSE_BUFFER_HEADER_SIZE)
2024 se->conn.max_write = bufsize - FUSE_BUFFER_HEADER_SIZE;
2028 se->op.init(se->userdata, &se->conn);
2030 if (se->conn.want & (~se->conn.capable)) {
2031 fuse_log(FUSE_LOG_ERR,
"fuse: error: filesystem requested capabilities " 2032 "0x%x that are not supported by kernel, aborting.\n",
2033 se->conn.want & (~se->conn.capable));
2035 se->error = -EPROTO;
2040 unsigned max_read_mo = get_max_read(se->mo);
2041 if (se->conn.max_read != max_read_mo) {
2042 fuse_log(FUSE_LOG_ERR,
"fuse: error: init() and fuse_session_new() " 2043 "requested different maximum read size (%u vs %u)\n",
2044 se->conn.max_read, max_read_mo);
2046 se->error = -EPROTO;
2051 if (se->conn.max_write < bufsize - FUSE_BUFFER_HEADER_SIZE) {
2052 se->bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
2054 if (arg->flags & FUSE_MAX_PAGES) {
2055 outarg.flags |= FUSE_MAX_PAGES;
2056 outarg.max_pages = (se->conn.max_write - 1) / getpagesize() + 1;
2061 outarg.flags |= FUSE_BIG_WRITES;
2064 outarg.flags |= FUSE_ASYNC_READ;
2066 outarg.flags |= FUSE_POSIX_LOCKS;
2068 outarg.flags |= FUSE_ATOMIC_O_TRUNC;
2070 outarg.flags |= FUSE_EXPORT_SUPPORT;
2072 outarg.flags |= FUSE_DONT_MASK;
2074 outarg.flags |= FUSE_FLOCK_LOCKS;
2076 outarg.flags |= FUSE_AUTO_INVAL_DATA;
2078 outarg.flags |= FUSE_DO_READDIRPLUS;
2080 outarg.flags |= FUSE_READDIRPLUS_AUTO;
2082 outarg.flags |= FUSE_ASYNC_DIO;
2084 outarg.flags |= FUSE_WRITEBACK_CACHE;
2086 outarg.flags |= FUSE_POSIX_ACL;
2088 outarg.flags |= FUSE_EXPLICIT_INVAL_DATA;
2089 outarg.max_readahead = se->conn.max_readahead;
2090 outarg.max_write = se->conn.max_write;
2091 if (se->conn.proto_minor >= 13) {
2092 if (se->conn.max_background >= (1 << 16))
2093 se->conn.max_background = (1 << 16) - 1;
2094 if (se->conn.congestion_threshold > se->conn.max_background)
2095 se->conn.congestion_threshold = se->conn.max_background;
2096 if (!se->conn.congestion_threshold) {
2097 se->conn.congestion_threshold =
2098 se->conn.max_background * 3 / 4;
2101 outarg.max_background = se->conn.max_background;
2102 outarg.congestion_threshold = se->conn.congestion_threshold;
2104 if (se->conn.proto_minor >= 23)
2105 outarg.time_gran = se->conn.time_gran;
2108 fuse_log(FUSE_LOG_DEBUG,
" INIT: %u.%u\n", outarg.major, outarg.minor);
2109 fuse_log(FUSE_LOG_DEBUG,
" flags=0x%08x\n", outarg.flags);
2110 fuse_log(FUSE_LOG_DEBUG,
" max_readahead=0x%08x\n",
2111 outarg.max_readahead);
2112 fuse_log(FUSE_LOG_DEBUG,
" max_write=0x%08x\n", outarg.max_write);
2113 fuse_log(FUSE_LOG_DEBUG,
" max_background=%i\n",
2114 outarg.max_background);
2115 fuse_log(FUSE_LOG_DEBUG,
" congestion_threshold=%i\n",
2116 outarg.congestion_threshold);
2117 fuse_log(FUSE_LOG_DEBUG,
" time_gran=%u\n",
2121 outargsize = FUSE_COMPAT_INIT_OUT_SIZE;
2122 else if (arg->minor < 23)
2123 outargsize = FUSE_COMPAT_22_INIT_OUT_SIZE;
2125 send_reply_ok(req, &outarg, outargsize);
2130 struct fuse_session *se = req->se;
2135 se->got_destroy = 1;
2137 se->op.destroy(se->userdata);
2139 send_reply_ok(req, NULL, 0);
2142 static void list_del_nreq(
struct fuse_notify_req *nreq)
2144 struct fuse_notify_req *prev = nreq->prev;
2145 struct fuse_notify_req *next = nreq->next;
2150 static void list_add_nreq(
struct fuse_notify_req *nreq,
2151 struct fuse_notify_req *next)
2153 struct fuse_notify_req *prev = next->prev;
2160 static void list_init_nreq(
struct fuse_notify_req *nreq)
2167 const void *inarg,
const struct fuse_buf *buf)
2169 struct fuse_session *se = req->se;
2170 struct fuse_notify_req *nreq;
2171 struct fuse_notify_req *head;
2173 pthread_mutex_lock(&se->lock);
2174 head = &se->notify_list;
2175 for (nreq = head->next; nreq != head; nreq = nreq->next) {
2176 if (nreq->unique == req->unique) {
2177 list_del_nreq(nreq);
2181 pthread_mutex_unlock(&se->lock);
2184 nreq->reply(nreq, req, nodeid, inarg, buf);
2187 static int send_notify_iov(
struct fuse_session *se,
int notify_code,
2188 struct iovec *iov,
int count)
2190 struct fuse_out_header out;
2196 out.error = notify_code;
2197 iov[0].iov_base = &out;
2198 iov[0].iov_len =
sizeof(
struct fuse_out_header);
2200 return fuse_send_msg(se, NULL, iov, count);
2206 struct fuse_notify_poll_wakeup_out outarg;
2207 struct iovec iov[2];
2211 iov[1].iov_base = &outarg;
2212 iov[1].iov_len =
sizeof(outarg);
2214 return send_notify_iov(ph->se, FUSE_NOTIFY_POLL, iov, 2);
2221 off_t off, off_t len)
2223 struct fuse_notify_inval_inode_out outarg;
2224 struct iovec iov[2];
2229 if (se->conn.proto_minor < 12)
2236 iov[1].iov_base = &outarg;
2237 iov[1].iov_len =
sizeof(outarg);
2239 return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2);
2243 const char *name,
size_t namelen)
2245 struct fuse_notify_inval_entry_out outarg;
2246 struct iovec iov[3];
2251 if (se->conn.proto_minor < 12)
2254 outarg.parent = parent;
2255 outarg.namelen = namelen;
2258 iov[1].iov_base = &outarg;
2259 iov[1].iov_len =
sizeof(outarg);
2260 iov[2].iov_base = (
void *)name;
2261 iov[2].iov_len = namelen + 1;
2263 return send_notify_iov(se, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
2268 const char *name,
size_t namelen)
2270 struct fuse_notify_delete_out outarg;
2271 struct iovec iov[3];
2276 if (se->conn.proto_minor < 18)
2279 outarg.parent = parent;
2280 outarg.child = child;
2281 outarg.namelen = namelen;
2284 iov[1].iov_base = &outarg;
2285 iov[1].iov_len =
sizeof(outarg);
2286 iov[2].iov_base = (
void *)name;
2287 iov[2].iov_len = namelen + 1;
2289 return send_notify_iov(se, FUSE_NOTIFY_DELETE, iov, 3);
2296 struct fuse_out_header out;
2297 struct fuse_notify_store_out outarg;
2298 struct iovec iov[3];
2305 if (se->conn.proto_minor < 15)
2309 out.error = FUSE_NOTIFY_STORE;
2311 outarg.nodeid = ino;
2312 outarg.offset = offset;
2316 iov[0].iov_base = &out;
2317 iov[0].iov_len =
sizeof(out);
2318 iov[1].iov_base = &outarg;
2319 iov[1].iov_len =
sizeof(outarg);
2321 res = fuse_send_data_iov(se, NULL, iov, 2, bufv, flags);
2328 struct fuse_retrieve_req {
2329 struct fuse_notify_req nreq;
2333 static void fuse_ll_retrieve_reply(
struct fuse_notify_req *nreq,
2338 struct fuse_session *se = req->se;
2339 struct fuse_retrieve_req *rreq =
2340 container_of(nreq,
struct fuse_retrieve_req, nreq);
2341 const struct fuse_notify_retrieve_in *arg = inarg;
2348 bufv.
buf[0].
mem = PARAM(arg);
2350 bufv.
buf[0].
size -=
sizeof(
struct fuse_in_header) +
2351 sizeof(struct fuse_notify_retrieve_in);
2353 if (bufv.
buf[0].
size < arg->size) {
2354 fuse_log(FUSE_LOG_ERR,
"fuse: retrieve reply: buffer size too small\n");
2360 if (se->op.retrieve_reply) {
2361 se->op.retrieve_reply(req, rreq->cookie, ino,
2362 arg->offset, &bufv);
2369 fuse_ll_clear_pipe(se);
2373 size_t size, off_t offset,
void *cookie)
2375 struct fuse_notify_retrieve_out outarg;
2376 struct iovec iov[2];
2377 struct fuse_retrieve_req *rreq;
2383 if (se->conn.proto_minor < 15)
2386 rreq = malloc(
sizeof(*rreq));
2390 pthread_mutex_lock(&se->lock);
2391 rreq->cookie = cookie;
2392 rreq->nreq.unique = se->notify_ctr++;
2393 rreq->nreq.reply = fuse_ll_retrieve_reply;
2394 list_add_nreq(&rreq->nreq, &se->notify_list);
2395 pthread_mutex_unlock(&se->lock);
2397 outarg.notify_unique = rreq->nreq.unique;
2398 outarg.nodeid = ino;
2399 outarg.offset = offset;
2403 iov[1].iov_base = &outarg;
2404 iov[1].iov_len =
sizeof(outarg);
2406 err = send_notify_iov(se, FUSE_NOTIFY_RETRIEVE, iov, 2);
2408 pthread_mutex_lock(&se->lock);
2409 list_del_nreq(&rreq->nreq);
2410 pthread_mutex_unlock(&se->lock);
2419 return req->se->userdata;
2430 pthread_mutex_lock(&req->lock);
2431 pthread_mutex_lock(&req->se->lock);
2432 req->u.ni.func = func;
2433 req->u.ni.data = data;
2434 pthread_mutex_unlock(&req->se->lock);
2435 if (req->interrupted && func)
2437 pthread_mutex_unlock(&req->lock);
2444 pthread_mutex_lock(&req->se->lock);
2445 interrupted = req->interrupted;
2446 pthread_mutex_unlock(&req->se->lock);
2455 [FUSE_LOOKUP] = { do_lookup,
"LOOKUP" },
2456 [FUSE_FORGET] = { do_forget,
"FORGET" },
2457 [FUSE_GETATTR] = { do_getattr,
"GETATTR" },
2458 [FUSE_SETATTR] = { do_setattr,
"SETATTR" },
2459 [FUSE_READLINK] = { do_readlink,
"READLINK" },
2460 [FUSE_SYMLINK] = { do_symlink,
"SYMLINK" },
2461 [FUSE_MKNOD] = { do_mknod,
"MKNOD" },
2462 [FUSE_MKDIR] = { do_mkdir,
"MKDIR" },
2463 [FUSE_UNLINK] = { do_unlink,
"UNLINK" },
2464 [FUSE_RMDIR] = { do_rmdir,
"RMDIR" },
2465 [FUSE_RENAME] = { do_rename,
"RENAME" },
2466 [FUSE_LINK] = { do_link,
"LINK" },
2467 [FUSE_OPEN] = { do_open,
"OPEN" },
2468 [FUSE_READ] = { do_read,
"READ" },
2469 [FUSE_WRITE] = { do_write,
"WRITE" },
2470 [FUSE_STATFS] = { do_statfs,
"STATFS" },
2471 [FUSE_RELEASE] = { do_release,
"RELEASE" },
2472 [FUSE_FSYNC] = { do_fsync,
"FSYNC" },
2473 [FUSE_SETXATTR] = { do_setxattr,
"SETXATTR" },
2474 [FUSE_GETXATTR] = { do_getxattr,
"GETXATTR" },
2475 [FUSE_LISTXATTR] = { do_listxattr,
"LISTXATTR" },
2476 [FUSE_REMOVEXATTR] = { do_removexattr,
"REMOVEXATTR" },
2477 [FUSE_FLUSH] = { do_flush,
"FLUSH" },
2478 [FUSE_INIT] = { do_init,
"INIT" },
2479 [FUSE_OPENDIR] = { do_opendir,
"OPENDIR" },
2480 [FUSE_READDIR] = { do_readdir,
"READDIR" },
2481 [FUSE_RELEASEDIR] = { do_releasedir,
"RELEASEDIR" },
2482 [FUSE_FSYNCDIR] = { do_fsyncdir,
"FSYNCDIR" },
2483 [FUSE_GETLK] = { do_getlk,
"GETLK" },
2484 [FUSE_SETLK] = { do_setlk,
"SETLK" },
2485 [FUSE_SETLKW] = { do_setlkw,
"SETLKW" },
2486 [FUSE_ACCESS] = { do_access,
"ACCESS" },
2487 [FUSE_CREATE] = { do_create,
"CREATE" },
2488 [FUSE_INTERRUPT] = { do_interrupt,
"INTERRUPT" },
2489 [FUSE_BMAP] = { do_bmap,
"BMAP" },
2490 [FUSE_IOCTL] = { do_ioctl,
"IOCTL" },
2491 [FUSE_POLL] = { do_poll,
"POLL" },
2492 [FUSE_FALLOCATE] = { do_fallocate,
"FALLOCATE" },
2493 [FUSE_DESTROY] = { do_destroy,
"DESTROY" },
2494 [FUSE_NOTIFY_REPLY] = { (
void *) 1,
"NOTIFY_REPLY" },
2495 [FUSE_BATCH_FORGET] = { do_batch_forget,
"BATCH_FORGET" },
2496 [FUSE_READDIRPLUS] = { do_readdirplus,
"READDIRPLUS"},
2497 [FUSE_RENAME2] = { do_rename2,
"RENAME2" },
2498 [FUSE_COPY_FILE_RANGE] = { do_copy_file_range,
"COPY_FILE_RANGE" },
2499 [FUSE_LSEEK] = { do_lseek,
"LSEEK" },
2500 [CUSE_INIT] = { cuse_lowlevel_init,
"CUSE_INIT" },
2503 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0])) 2505 static const char *opname(
enum fuse_opcode opcode)
2507 if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name)
2510 return fuse_ll_ops[opcode].name;
2513 static int fuse_ll_copy_from_pipe(
struct fuse_bufvec *dst,
2518 fuse_log(FUSE_LOG_ERR,
"fuse: copy from pipe: %s\n", strerror(-res));
2522 fuse_log(FUSE_LOG_ERR,
"fuse: copy from pipe: short read\n");
2531 fuse_session_process_buf_int(se, buf, NULL);
2534 void fuse_session_process_buf_int(
struct fuse_session *se,
2535 const struct fuse_buf *buf,
struct fuse_chan *ch)
2537 const size_t write_header_size =
sizeof(
struct fuse_in_header) +
2538 sizeof(struct fuse_write_in);
2540 struct fuse_bufvec tmpbuf = FUSE_BUFVEC_INIT(write_header_size);
2541 struct fuse_in_header *in;
2543 struct fuse_req *req;
2552 mbuf = malloc(tmpbuf.
buf[0].
size);
2554 fuse_log(FUSE_LOG_ERR,
"fuse: failed to allocate header\n");
2557 tmpbuf.
buf[0].
mem = mbuf;
2559 res = fuse_ll_copy_from_pipe(&tmpbuf, &bufv);
2570 "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
2571 (
unsigned long long) in->unique,
2572 opname((
enum fuse_opcode) in->opcode), in->opcode,
2573 (
unsigned long long) in->nodeid, buf->
size, in->pid);
2576 req = fuse_ll_alloc_req(se);
2578 struct fuse_out_header out = {
2579 .unique = in->unique,
2582 struct iovec iov = {
2584 .iov_len =
sizeof(
struct fuse_out_header),
2587 fuse_send_msg(se, ch, &iov, 1);
2591 req->unique = in->unique;
2592 req->ctx.uid = in->uid;
2593 req->ctx.gid = in->gid;
2594 req->ctx.pid = in->pid;
2595 req->ch = ch ? fuse_chan_get(ch) : NULL;
2598 if (!se->got_init) {
2599 enum fuse_opcode expected;
2601 expected = se->cuse_data ? CUSE_INIT : FUSE_INIT;
2602 if (in->opcode != expected)
2604 }
else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT)
2609 if (se->deny_others && in->uid != se->owner && in->uid != 0 &&
2610 in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
2611 in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
2612 in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
2613 in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR &&
2614 in->opcode != FUSE_NOTIFY_REPLY &&
2615 in->opcode != FUSE_READDIRPLUS)
2619 if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func)
2621 if (in->opcode != FUSE_INTERRUPT) {
2622 struct fuse_req *intr;
2623 pthread_mutex_lock(&se->lock);
2624 intr = check_interrupt(se, req);
2625 list_add_req(req, &se->list);
2626 pthread_mutex_unlock(&se->lock);
2632 (in->opcode != FUSE_WRITE || !se->op.write_buf) &&
2633 in->opcode != FUSE_NOTIFY_REPLY) {
2637 newmbuf = realloc(mbuf, buf->
size);
2638 if (newmbuf == NULL)
2642 tmpbuf = FUSE_BUFVEC_INIT(buf->
size - write_header_size);
2643 tmpbuf.
buf[0].
mem = (
char *)mbuf + write_header_size;
2645 res = fuse_ll_copy_from_pipe(&tmpbuf, &bufv);
2653 inarg = (
void *) &in[1];
2654 if (in->opcode == FUSE_WRITE && se->op.write_buf)
2655 do_write_buf(req, in->nodeid, inarg, buf);
2656 else if (in->opcode == FUSE_NOTIFY_REPLY)
2657 do_notify_reply(req, in->nodeid, inarg, buf);
2659 fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
2669 fuse_ll_clear_pipe(se);
2673 #define LL_OPTION(n,o,v) \ 2674 { n, offsetof(struct fuse_session, o), v } 2676 static const struct fuse_opt fuse_ll_opts[] = {
2677 LL_OPTION(
"debug", debug, 1),
2678 LL_OPTION(
"-d", debug, 1),
2679 LL_OPTION(
"--debug", debug, 1),
2680 LL_OPTION(
"allow_root", deny_others, 1),
2686 printf(
"using FUSE kernel interface version %i.%i\n",
2687 FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
2688 fuse_mount_version();
2696 " -o allow_other allow access by all users\n" 2697 " -o allow_root allow access by root\n" 2698 " -o auto_unmount auto unmount on process termination\n");
2703 struct fuse_ll_pipe *llp;
2705 if (se->got_init && !se->got_destroy) {
2707 se->op.destroy(se->userdata);
2709 llp = pthread_getspecific(se->pipe_key);
2711 fuse_ll_pipe_free(llp);
2712 pthread_key_delete(se->pipe_key);
2713 pthread_mutex_destroy(&se->lock);
2714 free(se->cuse_data);
2717 destroy_mount_opts(se->mo);
2722 static void fuse_ll_pipe_destructor(
void *data)
2724 struct fuse_ll_pipe *llp = data;
2725 fuse_ll_pipe_free(llp);
2730 return fuse_session_receive_buf_int(se, buf, NULL);
2733 int fuse_session_receive_buf_int(
struct fuse_session *se,
struct fuse_buf *buf,
2734 struct fuse_chan *ch)
2739 size_t bufsize = se->bufsize;
2740 struct fuse_ll_pipe *llp;
2746 llp = fuse_ll_get_pipe(se);
2750 if (llp->size < bufsize) {
2751 if (llp->can_grow) {
2752 res = fcntl(llp->pipe[0], F_SETPIPE_SZ, bufsize);
2755 res = grow_pipe_to_max(llp->pipe[0]);
2762 if (llp->size < bufsize)
2766 res = splice(ch ? ch->fd : se->fd,
2767 NULL, llp->pipe[1], NULL, bufsize, 0);
2774 if (err == ENODEV) {
2780 if (err != EINTR && err != EAGAIN)
2781 perror(
"fuse: splice from device");
2785 if (res <
sizeof(
struct fuse_in_header)) {
2786 fuse_log(FUSE_LOG_ERR,
"short splice from fuse device\n");
2801 if (res <
sizeof(
struct fuse_in_header) +
2802 sizeof(
struct fuse_write_in) + pagesize) {
2807 buf->
mem = malloc(se->bufsize);
2810 "fuse: failed to allocate read buffer\n");
2814 buf->
size = se->bufsize;
2820 fuse_log(FUSE_LOG_ERR,
"fuse: copy from pipe: %s\n",
2822 fuse_ll_clear_pipe(se);
2825 if (res < tmpbuf.size) {
2826 fuse_log(FUSE_LOG_ERR,
"fuse: copy from pipe: short read\n");
2827 fuse_ll_clear_pipe(se);
2830 assert(res == tmpbuf.size);
2834 buf->
fd = tmpbuf.fd;
2835 buf->
flags = tmpbuf.flags;
2837 buf->
size = tmpbuf.size;
2844 buf->
mem = malloc(se->bufsize);
2847 "fuse: failed to allocate read buffer\n");
2853 res = read(ch ? ch->fd : se->fd, buf->
mem, se->bufsize);
2864 if (err == ENODEV) {
2873 if (err != EINTR && err != EAGAIN)
2874 perror(
"fuse: reading device");
2877 if ((
size_t) res <
sizeof(
struct fuse_in_header)) {
2878 fuse_log(FUSE_LOG_ERR,
"short read on fuse device\n");
2889 size_t op_size,
void *userdata)
2892 struct fuse_session *se;
2893 struct mount_opts *mo;
2896 fuse_log(FUSE_LOG_ERR,
"fuse: warning: library too old, some operations may not work\n");
2900 if (args->
argc == 0) {
2901 fuse_log(FUSE_LOG_ERR,
"fuse: empty argv passed to fuse_session_new().\n");
2905 se = (
struct fuse_session *) calloc(1,
sizeof(
struct fuse_session));
2907 fuse_log(FUSE_LOG_ERR,
"fuse: failed to allocate fuse object\n");
2911 se->conn.max_write = UINT_MAX;
2912 se->conn.max_readahead = UINT_MAX;
2917 if(se->deny_others) {
2927 mo = parse_mount_opts(args);
2931 if(args->
argc == 1 &&
2932 args->
argv[0][0] ==
'-') {
2933 fuse_log(FUSE_LOG_ERR,
"fuse: warning: argv[0] looks like an option, but " 2934 "will be ignored\n");
2935 }
else if (args->
argc != 1) {
2937 fuse_log(FUSE_LOG_ERR,
"fuse: unknown option(s): `");
2938 for(i = 1; i < args->
argc-1; i++)
2945 fuse_log(FUSE_LOG_DEBUG,
"FUSE library version: %s\n", PACKAGE_VERSION);
2947 se->bufsize = FUSE_MAX_MAX_PAGES * getpagesize() +
2948 FUSE_BUFFER_HEADER_SIZE;
2950 list_init_req(&se->list);
2951 list_init_req(&se->interrupts);
2952 list_init_nreq(&se->notify_list);
2954 fuse_mutex_init(&se->lock);
2956 err = pthread_key_create(&se->pipe_key, fuse_ll_pipe_destructor);
2958 fuse_log(FUSE_LOG_ERR,
"fuse: failed to create thread specific key: %s\n",
2963 memcpy(&se->op, op, op_size);
2964 se->owner = getuid();
2965 se->userdata = userdata;
2971 pthread_mutex_destroy(&se->lock);
2976 destroy_mount_opts(mo);
2992 fd = open(
"/dev/null", O_RDWR);
2995 }
while (fd >= 0 && fd <= 2);
3003 fd = fuse_mnt_parse_fuse_fd(mountpoint);
3005 if (fcntl(fd, F_GETFD) == -1) {
3007 "fuse: Invalid file descriptor /dev/fd/%u\n",
3016 fd = fuse_kern_mount(mountpoint, se->mo);
3022 se->mountpoint = strdup(mountpoint);
3023 if (se->mountpoint == NULL)
3029 fuse_kern_unmount(mountpoint, fd);
3040 if (se->mountpoint != NULL) {
3041 fuse_kern_unmount(se->mountpoint, se->fd);
3043 free(se->mountpoint);
3044 se->mountpoint = NULL;
3052 size_t bufsize = 1024;
3056 unsigned long pid = req->ctx.pid;
3059 sprintf(path,
"/proc/%lu/task/%lu/status", pid, pid);
3062 buf = malloc(bufsize);
3067 fd = open(path, O_RDONLY);
3071 ret = read(fd, buf, bufsize);
3078 if ((
size_t)ret == bufsize) {
3085 s = strstr(buf,
"\nGroups:");
3093 unsigned long val = strtoul(s, &end, 0);
3113 (void) req; (void) size; (void) list;
void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func, void *data)
int fuse_opt_parse(struct fuse_args *args, void *data, const struct fuse_opt opts[], fuse_opt_proc_t proc)
int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent, const char *name, size_t namelen)
struct fuse_req * fuse_req_t
#define FUSE_CAP_DONT_MASK
int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov, int count)
int fuse_session_exited(struct fuse_session *se)
#define FUSE_CAP_SPLICE_READ
void fuse_reply_none(fuse_req_t req)
int fuse_session_receive_buf(struct fuse_session *se, struct fuse_buf *buf)
void fuse_session_process_buf(struct fuse_session *se, const struct fuse_buf *buf)
int fuse_reply_attr(fuse_req_t req, const struct stat *attr, double attr_timeout)
#define FUSE_CAP_ASYNC_DIO
#define FUSE_CAP_EXPORT_SUPPORT
#define FUSE_CAP_PARALLEL_DIROPS
#define FUSE_CAP_IOCTL_DIR
#define FUSE_CAP_FLOCK_LOCKS
int fuse_reply_lock(fuse_req_t req, const struct flock *lock)
#define FUSE_CAP_READDIRPLUS_AUTO
int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e, const struct fuse_file_info *fi)
int fuse_reply_xattr(fuse_req_t req, size_t count)
int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino, off_t off, off_t len)
#define FUSE_CAP_NO_OPENDIR_SUPPORT
void fuse_lowlevel_version(void)
int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino, off_t offset, struct fuse_bufvec *bufv, enum fuse_buf_copy_flags flags)
int fuse_reply_write(fuse_req_t req, size_t count)
int fuse_reply_lseek(fuse_req_t req, off_t off)
#define FUSE_CAP_HANDLE_KILLPRIV
int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
int fuse_reply_ioctl_retry(fuse_req_t req, const struct iovec *in_iov, size_t in_count, const struct iovec *out_iov, size_t out_count)
#define FUSE_CAP_EXPLICIT_INVAL_DATA
#define FUSE_CAP_ASYNC_READ
struct fuse_session * fuse_session_new(struct fuse_args *args, const struct fuse_lowlevel_ops *op, size_t op_size, void *userdata)
int fuse_lowlevel_notify_retrieve(struct fuse_session *se, fuse_ino_t ino, size_t size, off_t offset, void *cookie)
int fuse_session_fd(struct fuse_session *se)
enum fuse_buf_flags flags
void fuse_session_unmount(struct fuse_session *se)
#define FUSE_CAP_NO_OPEN_SUPPORT
ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src, enum fuse_buf_copy_flags flags)
int fuse_reply_err(fuse_req_t req, int err)
#define FUSE_CAP_WRITEBACK_CACHE
void fuse_session_reset(struct fuse_session *se)
void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
#define FUSE_CAP_READDIRPLUS
size_t fuse_buf_size(const struct fuse_bufvec *bufv)
int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
#define FUSE_CAP_SPLICE_MOVE
#define FUSE_CAP_POSIX_LOCKS
#define FUSE_CAP_ATOMIC_O_TRUNC
size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize, const char *name, const struct stat *stbuf, off_t off)
void * fuse_req_userdata(fuse_req_t req)
void fuse_opt_free_args(struct fuse_args *args)
int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[])
int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
const struct fuse_ctx * fuse_req_ctx(fuse_req_t req)
void fuse_session_destroy(struct fuse_session *se)
unsigned int cache_readdir
#define FUSE_CAP_SPLICE_WRITE
int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size)
int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv, enum fuse_buf_copy_flags flags)
int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent, fuse_ino_t child, const char *name, size_t namelen)
#define FUSE_CAP_POSIX_ACL
void fuse_lowlevel_help(void)
int fuse_opt_add_arg(struct fuse_args *args, const char *arg)
#define FUSE_CAP_AUTO_INVAL_DATA
void fuse_log(enum fuse_log_level level, const char *fmt,...)
int fuse_req_interrupted(fuse_req_t req)
int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *fi)
void fuse_session_exit(struct fuse_session *se)
int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
size_t fuse_add_direntry_plus(fuse_req_t req, char *buf, size_t bufsize, const char *name, const struct fuse_entry_param *e, off_t off)
int fuse_reply_readlink(fuse_req_t req, const char *link)
int fuse_reply_poll(fuse_req_t req, unsigned revents)
void(* fuse_interrupt_func_t)(fuse_req_t req, void *data)