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1/*
2 FUSE: Filesystem in Userspace
3 Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
4
5 This program can be distributed under the terms of the GNU LGPLv2.
6 See the file COPYING.LIB
7*/
8
9#include "config.h"
10#include "fuse_lowlevel.h"
11#include "fuse_kernel.h"
12#include "fuse_opt.h"
13#include "fuse_i.h"
14#include "fuse_misc.h"
15#include "fuse_lowlevel_compat.h"
16
17#include <stdio.h>
18#include <stdlib.h>
19#include <stddef.h>
20#include <string.h>
21#include <unistd.h>
22#include <limits.h>
23#include <errno.h>
24
25#define PARAM(inarg) (((const char *)(inarg)) + sizeof(*(inarg)))
26#define OFFSET_MAX 0x7fffffffffffffffLL
27
28struct fuse_ll;
29
30struct fuse_req {
31 struct fuse_ll *f;
32 uint64_t unique;
33 int ctr;
34 pthread_mutex_t lock;
35 struct fuse_ctx ctx;
36 struct fuse_chan *ch;
37 int interrupted;
38 union {
39 struct {
40 uint64_t unique;
41 } i;
42 struct {
43 fuse_interrupt_func_t func;
44 void *data;
45 } ni;
46 } u;
47 struct fuse_req *next;
48 struct fuse_req *prev;
49};
50
51struct fuse_ll {
52 int debug;
53 int allow_root;
54 struct fuse_lowlevel_ops op;
55 int got_init;
56 void *userdata;
57 uid_t owner;
58 struct fuse_conn_info conn;
59 struct fuse_req list;
60 struct fuse_req interrupts;
61 pthread_mutex_t lock;
62 int got_destroy;
63};
64
65static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr)
66{
67 attr->ino = stbuf->st_ino;
68 attr->mode = stbuf->st_mode;
69 attr->nlink = stbuf->st_nlink;
70 attr->uid = stbuf->st_uid;
71 attr->gid = stbuf->st_gid;
72 attr->rdev = stbuf->st_rdev;
73 attr->size = stbuf->st_size;
74 attr->blocks = stbuf->st_blocks;
75 attr->atime = stbuf->st_atime;
76 attr->mtime = stbuf->st_mtime;
77 attr->ctime = stbuf->st_ctime;
78 attr->atimensec = ST_ATIM_NSEC(stbuf);
79 attr->mtimensec = ST_MTIM_NSEC(stbuf);
80 attr->ctimensec = ST_CTIM_NSEC(stbuf);
81#ifdef POSIXACLS
82 attr->filling = 0; /* JPA trying to be safe */
83#endif
84}
85
86static void convert_attr(const struct fuse_setattr_in *attr, struct stat *stbuf)
87{
88 stbuf->st_mode = attr->mode;
89 stbuf->st_uid = attr->uid;
90 stbuf->st_gid = attr->gid;
91 stbuf->st_size = attr->size;
92 stbuf->st_atime = attr->atime;
93 stbuf->st_mtime = attr->mtime;
94 ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
95 ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
96}
97
98static size_t iov_length(const struct iovec *iov, size_t count)
99{
100 size_t seg;
101 size_t ret = 0;
102
103 for (seg = 0; seg < count; seg++)
104 ret += iov[seg].iov_len;
105 return ret;
106}
107
108static void list_init_req(struct fuse_req *req)
109{
110 req->next = req;
111 req->prev = req;
112}
113
114static void list_del_req(struct fuse_req *req)
115{
116 struct fuse_req *prev = req->prev;
117 struct fuse_req *next = req->next;
118 prev->next = next;
119 next->prev = prev;
120}
121
122static void list_add_req(struct fuse_req *req, struct fuse_req *next)
123{
124 struct fuse_req *prev = next->prev;
125 req->next = next;
126 req->prev = prev;
127 prev->next = req;
128 next->prev = req;
129}
130
131static void destroy_req(fuse_req_t req)
132{
133 pthread_mutex_destroy(&req->lock);
134 free(req);
135}
136
137static void free_req(fuse_req_t req)
138{
139 int ctr;
140 struct fuse_ll *f = req->f;
141
142 pthread_mutex_lock(&req->lock);
143 req->u.ni.func = NULL;
144 req->u.ni.data = NULL;
145 pthread_mutex_unlock(&req->lock);
146
147 pthread_mutex_lock(&f->lock);
148 list_del_req(req);
149 ctr = --req->ctr;
150 pthread_mutex_unlock(&f->lock);
151 if (!ctr)
152 destroy_req(req);
153}
154
155static int send_reply_iov(fuse_req_t req, int error, struct iovec *iov,
156 int count)
157{
158 struct fuse_out_header out;
159 int res;
160
161 if (error <= -1000 || error > 0) {
162 fprintf(stderr, "fuse: bad error value: %i\n", error);
163 error = -ERANGE;
164 }
165
166 out.unique = req->unique;
167 out.error = error;
168 iov[0].iov_base = &out;
169 iov[0].iov_len = sizeof(struct fuse_out_header);
170 out.len = iov_length(iov, count);
171
172 if (req->f->debug)
173 fprintf(stderr, " unique: %llu, error: %i (%s), outsize: %i\n",
174 (unsigned long long) out.unique, out.error,
175 strerror(-out.error), out.len);
176 res = fuse_chan_send(req->ch, iov, count);
177 free_req(req);
178
179 return res;
180}
181
182static int send_reply(fuse_req_t req, int error, const void *arg,
183 size_t argsize)
184{
185 struct iovec iov[2];
186 int count = 1;
187 if (argsize) {
188 iov[1].iov_base = (void *) arg;
189 iov[1].iov_len = argsize;
190 count++;
191 }
192 return send_reply_iov(req, error, iov, count);
193}
194
195int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
196{
197 int res;
198 struct iovec *padded_iov;
199
200 padded_iov = malloc((count + 1) * sizeof(struct iovec));
201 if (padded_iov == NULL)
202 return fuse_reply_err(req, -ENOMEM);
203
204 memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
205 count++;
206
207 res = send_reply_iov(req, 0, padded_iov, count);
208 free(padded_iov);
209
210 return res;
211}
212
213size_t fuse_dirent_size(size_t namelen)
214{
215 return FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + namelen);
216}
217
218char *fuse_add_dirent(char *buf, const char *name, const struct stat *stbuf,
219 off_t off)
220{
221 unsigned namelen = strlen(name);
222 unsigned entlen = FUSE_NAME_OFFSET + namelen;
223 unsigned entsize = fuse_dirent_size(namelen);
224 unsigned padlen = entsize - entlen;
225 struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
226
227 dirent->ino = stbuf->st_ino;
228 dirent->off = off;
229 dirent->namelen = namelen;
230 dirent->type = (stbuf->st_mode & 0170000) >> 12;
231 strncpy(dirent->name, name, namelen);
232 if (padlen)
233 memset(buf + entlen, 0, padlen);
234
235 return buf + entsize;
236}
237
238size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
239 const char *name, const struct stat *stbuf, off_t off)
240{
241 size_t entsize;
242
243 (void) req;
244 entsize = fuse_dirent_size(strlen(name));
245 if (entsize <= bufsize && buf)
246 fuse_add_dirent(buf, name, stbuf, off);
247 return entsize;
248}
249
250#if HAVE_SYS_STATVFS_H
251
252static void convert_statfs(const struct statvfs *stbuf,
253 struct fuse_kstatfs *kstatfs)
254{
255 kstatfs->bsize = stbuf->f_bsize;
256 kstatfs->frsize = stbuf->f_frsize;
257 kstatfs->blocks = stbuf->f_blocks;
258 kstatfs->bfree = stbuf->f_bfree;
259 kstatfs->bavail = stbuf->f_bavail;
260 kstatfs->files = stbuf->f_files;
261 kstatfs->ffree = stbuf->f_ffree;
262 kstatfs->namelen = stbuf->f_namemax;
263}
264#endif
265
266
267static int send_reply_ok(fuse_req_t req, const void *arg, size_t argsize)
268{
269 return send_reply(req, 0, arg, argsize);
270}
271
272int fuse_reply_err(fuse_req_t req, int err)
273{
274 return send_reply(req, -err, NULL, 0);
275}
276
277void fuse_reply_none(fuse_req_t req)
278{
279 fuse_chan_send(req->ch, NULL, 0);
280 free_req(req);
281}
282
283static unsigned long calc_timeout_sec(double t)
284{
285 if (t > (double) ULONG_MAX)
286 return ULONG_MAX;
287 else if (t < 0.0)
288 return 0;
289 else
290 return (unsigned long) t;
291}
292
293static unsigned int calc_timeout_nsec(double t)
294{
295 unsigned long secs = calc_timeout_sec(t);
296 double f = t - (double)secs;
297 if (f < 0.0)
298 return 0;
299 else if (f >= 0.999999999)
300 return 999999999;
301 else
302 return (unsigned int) (f * 1.0e9);
303}
304
305static void fill_entry(struct fuse_entry_out *arg,
306 const struct fuse_entry_param *e)
307{
308 arg->nodeid = e->ino;
309 arg->generation = e->generation;
310 arg->entry_valid = calc_timeout_sec(e->entry_timeout);
311 arg->entry_valid_nsec = calc_timeout_nsec(e->entry_timeout);
312 arg->attr_valid = calc_timeout_sec(e->attr_timeout);
313 arg->attr_valid_nsec = calc_timeout_nsec(e->attr_timeout);
314 convert_stat(&e->attr, &arg->attr);
315}
316
317static void fill_open(struct fuse_open_out *arg,
318 const struct fuse_file_info *f)
319{
320 arg->fh = f->fh;
321 if (f->direct_io)
322 arg->open_flags |= FOPEN_DIRECT_IO;
323 if (f->keep_cache)
324 arg->open_flags |= FOPEN_KEEP_CACHE;
325}
326
327int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
328{
329 struct fuse_entry_out arg;
330
331 /* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
332 negative entry */
333 if (!e->ino && req->f->conn.proto_minor < 4)
334 return fuse_reply_err(req, ENOENT);
335
336 memset(&arg, 0, sizeof(arg));
337 fill_entry(&arg, e);
338#ifdef POSIXACLS
339 return send_reply_ok(req, &arg, (req->f->conn.proto_minor >= 12
340 ? sizeof(arg) : FUSE_COMPAT_ENTRY_OUT_SIZE));
341#else
342 return send_reply_ok(req, &arg, sizeof(arg));
343#endif
344}
345
346int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
347 const struct fuse_file_info *f)
348{
349 struct {
350 struct fuse_entry_out e;
351 struct fuse_open_out o;
352 } arg;
353
354 memset(&arg, 0, sizeof(arg));
355 fill_entry(&arg.e, e);
356#ifdef POSIXACLS
357 if (req->f->conn.proto_minor < 12) {
358 fill_open((struct fuse_open_out*)
359 ((char*)&arg + FUSE_COMPAT_ENTRY_OUT_SIZE), f);
360 return send_reply_ok(req, &arg,
361 FUSE_COMPAT_ENTRY_OUT_SIZE + sizeof(struct fuse_open_out));
362 } else {
363 fill_open(&arg.o, f);
364 return send_reply_ok(req, &arg, sizeof(arg));
365 }
366#else
367 fill_open(&arg.o, f);
368 return send_reply_ok(req, &arg, sizeof(arg));
369#endif
370}
371
372int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
373 double attr_timeout)
374{
375 struct fuse_attr_out arg;
376
377 memset(&arg, 0, sizeof(arg));
378 arg.attr_valid = calc_timeout_sec(attr_timeout);
379 arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
380 convert_stat(attr, &arg.attr);
381
382#ifdef POSIXACLS
383 return send_reply_ok(req, &arg, (req->f->conn.proto_minor >= 12
384 ? sizeof(arg) : FUSE_COMPAT_FUSE_ATTR_OUT_SIZE));
385#else
386 return send_reply_ok(req, &arg, sizeof(arg));
387#endif
388}
389
390int fuse_reply_readlink(fuse_req_t req, const char *linkname)
391{
392 return send_reply_ok(req, linkname, strlen(linkname));
393}
394
395int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f)
396{
397 struct fuse_open_out arg;
398
399 memset(&arg, 0, sizeof(arg));
400 fill_open(&arg, f);
401 return send_reply_ok(req, &arg, sizeof(arg));
402}
403
404int fuse_reply_write(fuse_req_t req, size_t count)
405{
406 struct fuse_write_out arg;
407
408 memset(&arg, 0, sizeof(arg));
409 arg.size = count;
410
411 return send_reply_ok(req, &arg, sizeof(arg));
412}
413
414int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
415{
416 return send_reply_ok(req, buf, size);
417}
418
419#if HAVE_SYS_STATVFS_H
420
421int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
422{
423 struct fuse_statfs_out arg;
424 size_t size = req->f->conn.proto_minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(arg);
425
426 memset(&arg, 0, sizeof(arg));
427 convert_statfs(stbuf, &arg.st);
428
429 return send_reply_ok(req, &arg, size);
430}
431#endif
432
433
434int fuse_reply_xattr(fuse_req_t req, size_t count)
435{
436 struct fuse_getxattr_out arg;
437
438 memset(&arg, 0, sizeof(arg));
439 arg.size = count;
440
441 return send_reply_ok(req, &arg, sizeof(arg));
442}
443
444int fuse_reply_lock(fuse_req_t req, struct flock *lock)
445{
446 struct fuse_lk_out arg;
447
448 memset(&arg, 0, sizeof(arg));
449 arg.lk.type = lock->l_type;
450 if (lock->l_type != F_UNLCK) {
451 arg.lk.start = lock->l_start;
452 if (lock->l_len == 0)
453 arg.lk.end = OFFSET_MAX;
454 else
455 arg.lk.end = lock->l_start + lock->l_len - 1;
456 }
457 arg.lk.pid = lock->l_pid;
458 return send_reply_ok(req, &arg, sizeof(arg));
459}
460
461int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
462{
463 struct fuse_bmap_out arg;
464
465 memset(&arg, 0, sizeof(arg));
466 arg.block = idx;
467
468 return send_reply_ok(req, &arg, sizeof(arg));
469}
470
471static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
472{
473 const char *name = (const char *) inarg;
474
475 if (req->f->op.lookup)
476 req->f->op.lookup(req, nodeid, name);
477 else
478 fuse_reply_err(req, ENOSYS);
479}
480
481static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
482{
483 const struct fuse_forget_in *arg = (const struct fuse_forget_in *) inarg;
484
485 if (req->f->op.forget)
486 req->f->op.forget(req, nodeid, arg->nlookup);
487 else
488 fuse_reply_none(req);
489}
490
491static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
492{
493 (void) inarg;
494
495 if (req->f->op.getattr)
496 req->f->op.getattr(req, nodeid, NULL);
497 else
498 fuse_reply_err(req, ENOSYS);
499}
500
501static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
502{
503 const struct fuse_setattr_in *arg = (const struct fuse_setattr_in *) inarg;
504
505 if (req->f->op.setattr) {
506 struct fuse_file_info *fi = NULL;
507 struct fuse_file_info fi_store;
508 struct stat stbuf;
509 memset(&stbuf, 0, sizeof(stbuf));
510 convert_attr(arg, &stbuf);
511 if (arg->valid & FATTR_FH) {
512 memset(&fi_store, 0, sizeof(fi_store));
513 fi = &fi_store;
514 fi->fh = arg->fh;
515 fi->fh_old = fi->fh;
516 }
517 req->f->op.setattr(req, nodeid, &stbuf, arg->valid & ~FATTR_FH, fi);
518 } else
519 fuse_reply_err(req, ENOSYS);
520}
521
522static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
523{
524 const struct fuse_access_in *arg = (const struct fuse_access_in *) inarg;
525
526 if (req->f->op.access)
527 req->f->op.access(req, nodeid, arg->mask);
528 else
529 fuse_reply_err(req, ENOSYS);
530}
531
532static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
533{
534 (void) inarg;
535
536 if (req->f->op.readlink)
537 req->f->op.readlink(req, nodeid);
538 else
539 fuse_reply_err(req, ENOSYS);
540}
541
542static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
543{
544 const struct fuse_mknod_in *arg = (const struct fuse_mknod_in *) inarg;
545 const char *name = PARAM(arg);
546
547#ifdef POSIXACLS
548 if (req->f->conn.proto_minor >= 12)
549 req->ctx.umask = arg->umask;
550 else
551#endif
552 name = (const char *) inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
553
554 if (req->f->op.mknod)
555 req->f->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
556 else
557 fuse_reply_err(req, ENOSYS);
558}
559
560static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
561{
562 const struct fuse_mkdir_in *arg = (const struct fuse_mkdir_in *) inarg;
563
564#ifdef POSIXACLS
565 if (req->f->conn.proto_minor >= 12)
566 req->ctx.umask = arg->umask;
567#endif
568
569 if (req->f->op.mkdir)
570 req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
571 else
572 fuse_reply_err(req, ENOSYS);
573}
574
575static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
576{
577 const char *name = (const char *) inarg;
578
579 if (req->f->op.unlink)
580 req->f->op.unlink(req, nodeid, name);
581 else
582 fuse_reply_err(req, ENOSYS);
583}
584
585static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
586{
587 const char *name = (const char *) inarg;
588
589 if (req->f->op.rmdir)
590 req->f->op.rmdir(req, nodeid, name);
591 else
592 fuse_reply_err(req, ENOSYS);
593}
594
595static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
596{
597 const char *name = (const char *) inarg;
598 const char *linkname = ((const char *) inarg) + strlen((const char *) inarg) + 1;
599
600 if (req->f->op.symlink)
601 req->f->op.symlink(req, linkname, nodeid, name);
602 else
603 fuse_reply_err(req, ENOSYS);
604}
605
606static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
607{
608 const struct fuse_rename_in *arg = (const struct fuse_rename_in *) inarg;
609 const char *oldname = PARAM(arg);
610 const char *newname = oldname + strlen(oldname) + 1;
611
612 if (req->f->op.rename)
613 req->f->op.rename(req, nodeid, oldname, arg->newdir, newname);
614 else
615 fuse_reply_err(req, ENOSYS);
616}
617
618static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
619{
620 const struct fuse_link_in *arg = (const struct fuse_link_in *) inarg;
621
622 if (req->f->op.link)
623 req->f->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
624 else
625 fuse_reply_err(req, ENOSYS);
626}
627
628static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
629{
630 const struct fuse_create_in *arg = (const struct fuse_create_in *) inarg;
631
632 if (req->f->op.create) {
633 struct fuse_file_info fi;
634 const char *name = PARAM(arg);
635
636 memset(&fi, 0, sizeof(fi));
637 fi.flags = arg->flags;
638
639#ifdef POSIXACLS
640 if (req->f->conn.proto_minor >= 12)
641 req->ctx.umask = arg->umask;
642 else
643#endif
644 name = (const char *) inarg + sizeof(struct fuse_open_in);
645
646 req->f->op.create(req, nodeid, name, arg->mode, &fi);
647 } else
648 fuse_reply_err(req, ENOSYS);
649}
650
651static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
652{
653 const struct fuse_open_in *arg = (const struct fuse_open_in *) inarg;
654 struct fuse_file_info fi;
655
656 memset(&fi, 0, sizeof(fi));
657 fi.flags = arg->flags;
658
659 if (req->f->op.open)
660 req->f->op.open(req, nodeid, &fi);
661 else
662 fuse_reply_open(req, &fi);
663}
664
665static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
666{
667 const struct fuse_read_in *arg = (const struct fuse_read_in *) inarg;
668
669 if (req->f->op.read) {
670 struct fuse_file_info fi;
671
672 memset(&fi, 0, sizeof(fi));
673 fi.fh = arg->fh;
674 fi.fh_old = fi.fh;
675 req->f->op.read(req, nodeid, arg->size, arg->offset, &fi);
676 } else
677 fuse_reply_err(req, ENOSYS);
678}
679
680static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
681{
682 const struct fuse_write_in *arg = (const struct fuse_write_in *) inarg;
683 struct fuse_file_info fi;
684
685 memset(&fi, 0, sizeof(fi));
686 fi.fh = arg->fh;
687 fi.fh_old = fi.fh;
688 fi.writepage = arg->write_flags & 1;
689
690 if (req->f->op.write) {
691#ifdef POSIXACLS
692 const char *buf;
693
694 if (req->f->conn.proto_minor >= 12)
695 buf = PARAM(arg);
696 else
697 buf = ((const char*)arg) + FUSE_COMPAT_WRITE_IN_SIZE;
698 req->f->op.write(req, nodeid, buf, arg->size, arg->offset, &fi);
699#else
700 req->f->op.write(req, nodeid, PARAM(arg), arg->size, arg->offset, &fi);
701#endif
702 } else
703 fuse_reply_err(req, ENOSYS);
704}
705
706static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
707{
708 const struct fuse_flush_in *arg = (const struct fuse_flush_in *) inarg;
709 struct fuse_file_info fi;
710
711 memset(&fi, 0, sizeof(fi));
712 fi.fh = arg->fh;
713 fi.fh_old = fi.fh;
714 fi.flush = 1;
715 if (req->f->conn.proto_minor >= 7)
716 fi.lock_owner = arg->lock_owner;
717
718 if (req->f->op.flush)
719 req->f->op.flush(req, nodeid, &fi);
720 else
721 fuse_reply_err(req, ENOSYS);
722}
723
724static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
725{
726 const struct fuse_release_in *arg = (const struct fuse_release_in *) inarg;
727 struct fuse_file_info fi;
728
729 memset(&fi, 0, sizeof(fi));
730 fi.flags = arg->flags;
731 fi.fh = arg->fh;
732 fi.fh_old = fi.fh;
733 if (req->f->conn.proto_minor >= 8) {
734 fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
735 fi.lock_owner = arg->lock_owner;
736 }
737
738 if (req->f->op.release)
739 req->f->op.release(req, nodeid, &fi);
740 else
741 fuse_reply_err(req, 0);
742}
743
744static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
745{
746 const struct fuse_fsync_in *arg = (const struct fuse_fsync_in *) inarg;
747 struct fuse_file_info fi;
748
749 memset(&fi, 0, sizeof(fi));
750 fi.fh = arg->fh;
751 fi.fh_old = fi.fh;
752
753 if (req->f->op.fsync)
754 req->f->op.fsync(req, nodeid, arg->fsync_flags & 1, &fi);
755 else
756 fuse_reply_err(req, ENOSYS);
757}
758
759static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
760{
761 const struct fuse_open_in *arg = (const struct fuse_open_in *) inarg;
762 struct fuse_file_info fi;
763
764 memset(&fi, 0, sizeof(fi));
765 fi.flags = arg->flags;
766
767 if (req->f->op.opendir)
768 req->f->op.opendir(req, nodeid, &fi);
769 else
770 fuse_reply_open(req, &fi);
771}
772
773static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
774{
775 const struct fuse_read_in *arg = (const struct fuse_read_in *) inarg;
776 struct fuse_file_info fi;
777
778 memset(&fi, 0, sizeof(fi));
779 fi.fh = arg->fh;
780 fi.fh_old = fi.fh;
781
782 if (req->f->op.readdir)
783 req->f->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
784 else
785 fuse_reply_err(req, ENOSYS);
786}
787
788static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
789{
790 const struct fuse_release_in *arg = (const struct fuse_release_in *) inarg;
791 struct fuse_file_info fi;
792
793 memset(&fi, 0, sizeof(fi));
794 fi.flags = arg->flags;
795 fi.fh = arg->fh;
796 fi.fh_old = fi.fh;
797
798 if (req->f->op.releasedir)
799 req->f->op.releasedir(req, nodeid, &fi);
800 else
801 fuse_reply_err(req, 0);
802}
803
804static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
805{
806 const struct fuse_fsync_in *arg = (const struct fuse_fsync_in *) inarg;
807 struct fuse_file_info fi;
808
809 memset(&fi, 0, sizeof(fi));
810 fi.fh = arg->fh;
811 fi.fh_old = fi.fh;
812
813 if (req->f->op.fsyncdir)
814 req->f->op.fsyncdir(req, nodeid, arg->fsync_flags & 1, &fi);
815 else
816 fuse_reply_err(req, ENOSYS);
817}
818
819static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
820{
821 (void) nodeid;
822 (void) inarg;
823
824 if (req->f->op.statfs)
825 req->f->op.statfs(req, nodeid);
826 else {
827#if HAVE_SYS_STATVFS_H
828 struct statvfs buf = {
829 .f_namemax = 255,
830 .f_bsize = 512,
831 };
832 fuse_reply_statfs(req, &buf);
833#endif
834 }
835}
836
837static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
838{
839 const struct fuse_setxattr_in *arg = (const struct fuse_setxattr_in *) inarg;
840 const char *name = PARAM(arg);
841 const char *value = name + strlen(name) + 1;
842
843 if (req->f->op.setxattr)
844 req->f->op.setxattr(req, nodeid, name, value, arg->size, arg->flags);
845 else
846 fuse_reply_err(req, ENOSYS);
847}
848
849static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
850{
851 const struct fuse_getxattr_in *arg = (const struct fuse_getxattr_in *) inarg;
852
853 if (req->f->op.getxattr)
854 req->f->op.getxattr(req, nodeid, PARAM(arg), arg->size);
855 else
856 fuse_reply_err(req, ENOSYS);
857}
858
859static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
860{
861 const struct fuse_getxattr_in *arg = (const struct fuse_getxattr_in *) inarg;
862
863 if (req->f->op.listxattr)
864 req->f->op.listxattr(req, nodeid, arg->size);
865 else
866 fuse_reply_err(req, ENOSYS);
867}
868
869static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
870{
871 const char *name = (const char *) inarg;
872
873 if (req->f->op.removexattr)
874 req->f->op.removexattr(req, nodeid, name);
875 else
876 fuse_reply_err(req, ENOSYS);
877}
878
879static void convert_fuse_file_lock(const struct fuse_file_lock *fl,
880 struct flock *flock)
881{
882 memset(flock, 0, sizeof(struct flock));
883 flock->l_type = fl->type;
884 flock->l_whence = SEEK_SET;
885 flock->l_start = fl->start;
886 if (fl->end == OFFSET_MAX)
887 flock->l_len = 0;
888 else
889 flock->l_len = fl->end - fl->start + 1;
890 flock->l_pid = fl->pid;
891}
892
893static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
894{
895 const struct fuse_lk_in *arg = (const struct fuse_lk_in *) inarg;
896 struct fuse_file_info fi;
897 struct flock flock;
898
899 memset(&fi, 0, sizeof(fi));
900 fi.fh = arg->fh;
901 fi.lock_owner = arg->owner;
902
903 convert_fuse_file_lock(&arg->lk, &flock);
904 if (req->f->op.getlk)
905 req->f->op.getlk(req, nodeid, &fi, &flock);
906 else
907 fuse_reply_err(req, ENOSYS);
908}
909
910static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
911 const void *inarg, int should_sleep)
912{
913 const struct fuse_lk_in *arg = (const struct fuse_lk_in *) inarg;
914 struct fuse_file_info fi;
915 struct flock flock;
916
917 memset(&fi, 0, sizeof(fi));
918 fi.fh = arg->fh;
919 fi.lock_owner = arg->owner;
920
921 convert_fuse_file_lock(&arg->lk, &flock);
922 if (req->f->op.setlk)
923 req->f->op.setlk(req, nodeid, &fi, &flock, should_sleep);
924 else
925 fuse_reply_err(req, ENOSYS);
926}
927
928static void do_setlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
929{
930 do_setlk_common(req, nodeid, inarg, 0);
931}
932
933static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
934{
935 do_setlk_common(req, nodeid, inarg, 1);
936}
937
938static int find_interrupted(struct fuse_ll *f, struct fuse_req *req)
939{
940 struct fuse_req *curr;
941
942 for (curr = f->list.next; curr != &f->list; curr = curr->next) {
943 if (curr->unique == req->u.i.unique) {
944 curr->ctr++;
945 pthread_mutex_unlock(&f->lock);
946
947 /* Ugh, ugly locking */
948 pthread_mutex_lock(&curr->lock);
949 pthread_mutex_lock(&f->lock);
950 curr->interrupted = 1;
951 pthread_mutex_unlock(&f->lock);
952 if (curr->u.ni.func)
953 curr->u.ni.func(curr, curr->u.ni.data);
954 pthread_mutex_unlock(&curr->lock);
955
956 pthread_mutex_lock(&f->lock);
957 curr->ctr--;
958 if (!curr->ctr)
959 destroy_req(curr);
960
961 return 1;
962 }
963 }
964 for (curr = f->interrupts.next; curr != &f->interrupts;
965 curr = curr->next) {
966 if (curr->u.i.unique == req->u.i.unique)
967 return 1;
968 }
969 return 0;
970}
971
972static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
973{
974 const struct fuse_interrupt_in *arg = (const struct fuse_interrupt_in *) inarg;
975 struct fuse_ll *f = req->f;
976
977 (void) nodeid;
978 if (f->debug)
979 fprintf(stderr, "INTERRUPT: %llu\n", (unsigned long long) arg->unique);
980
981 req->u.i.unique = arg->unique;
982
983 pthread_mutex_lock(&f->lock);
984 if (find_interrupted(f, req))
985 destroy_req(req);
986 else
987 list_add_req(req, &f->interrupts);
988 pthread_mutex_unlock(&f->lock);
989}
990
991static struct fuse_req *check_interrupt(struct fuse_ll *f, struct fuse_req *req)
992{
993 struct fuse_req *curr;
994
995 for (curr = f->interrupts.next; curr != &f->interrupts; curr = curr->next) {
996 if (curr->u.i.unique == req->unique) {
997 req->interrupted = 1;
998 list_del_req(curr);
999 free(curr);
1000 return NULL;
1001 }
1002 }
1003 curr = f->interrupts.next;
1004 if (curr != &f->interrupts) {
1005 list_del_req(curr);
1006 list_init_req(curr);
1007 return curr;
1008 } else
1009 return NULL;
1010}
1011
1012static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
1013{
1014 const struct fuse_bmap_in *arg = (const struct fuse_bmap_in *) inarg;
1015
1016 if (req->f->op.bmap)
1017 req->f->op.bmap(req, nodeid, arg->blocksize, arg->block);
1018 else
1019 fuse_reply_err(req, ENOSYS);
1020}
1021
1022static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
1023{
1024 const struct fuse_init_in *arg = (const struct fuse_init_in *) inarg;
1025 struct fuse_init_out outarg;
1026 struct fuse_ll *f = req->f;
1027 size_t bufsize = fuse_chan_bufsize(req->ch);
1028
1029 (void) nodeid;
1030 if (f->debug) {
1031 fprintf(stderr, "INIT: %u.%u\n", arg->major, arg->minor);
1032 if (arg->major > 7 || (arg->major == 7 && arg->minor >= 6)) {
1033 fprintf(stderr, "flags=0x%08x\n", arg->flags);
1034 fprintf(stderr, "max_readahead=0x%08x\n", arg->max_readahead);
1035 }
1036 }
1037 f->conn.proto_major = arg->major;
1038 f->conn.proto_minor = arg->minor;
1039
1040 if (arg->major < 7) {
1041 fprintf(stderr, "fuse: unsupported protocol version: %u.%u\n",
1042 arg->major, arg->minor);
1043 fuse_reply_err(req, EPROTO);
1044 return;
1045 }
1046
1047 if (arg->major > 7 || (arg->major == 7 && arg->minor >= 6)) {
1048 if (f->conn.async_read)
1049 f->conn.async_read = arg->flags & FUSE_ASYNC_READ;
1050 if (arg->max_readahead < f->conn.max_readahead)
1051 f->conn.max_readahead = arg->max_readahead;
1052#ifdef POSIXACLS
1053 if (arg->flags & FUSE_DONT_MASK)
1054 f->conn.capable |= FUSE_CAP_DONT_MASK;
1055#endif
1056 } else {
1057 f->conn.async_read = 0;
1058 f->conn.max_readahead = 0;
1059 }
1060
1061 if (bufsize < FUSE_MIN_READ_BUFFER) {
1062 fprintf(stderr, "fuse: warning: buffer size too small: %zu\n",
1063 bufsize);
1064 bufsize = FUSE_MIN_READ_BUFFER;
1065 }
1066
1067 bufsize -= 4096;
1068 if (bufsize < f->conn.max_write)
1069 f->conn.max_write = bufsize;
1070
1071 f->got_init = 1;
1072 if (f->op.init)
1073 f->op.init(f->userdata, &f->conn);
1074
1075 memset(&outarg, 0, sizeof(outarg));
1076 outarg.major = FUSE_KERNEL_VERSION;
1077 /*
1078 * if POSIXACLS is not set, protocol 7.8 provides a good
1079 * compatibility with older kernel modules.
1080 * if POSIXACLS is set, we try to use protocol 7.12 supposed
1081 * to have the ability to process the umask conditionnally,
1082 * but, when using an older kernel module, we fallback to 7.8
1083 */
1084#ifdef POSIXACLS
1085 if (arg->major > 7 || (arg->major == 7 && arg->minor >= 12))
1086 outarg.minor = FUSE_KERNEL_MINOR_VERSION;
1087 else
1088 outarg.minor = FUSE_KERNEL_MINOR_FALLBACK;
1089#else
1090 outarg.minor = FUSE_KERNEL_MINOR_VERSION;
1091#endif
1092 if (f->conn.async_read)
1093 outarg.flags |= FUSE_ASYNC_READ;
1094 if (f->op.getlk && f->op.setlk)
1095 outarg.flags |= FUSE_POSIX_LOCKS;
1096#ifdef POSIXACLS
1097 if (f->conn.want & FUSE_CAP_DONT_MASK)
1098 outarg.flags |= FUSE_DONT_MASK;
1099#endif
1100 outarg.flags |= FUSE_BIG_WRITES ;
1101 outarg.max_readahead = f->conn.max_readahead;
1102 outarg.max_write = f->conn.max_write;
1103
1104 if (f->debug) {
1105 fprintf(stderr, " INIT: %u.%u\n", outarg.major, outarg.minor);
1106 fprintf(stderr, " flags=0x%08x\n", outarg.flags);
1107 fprintf(stderr, " max_readahead=0x%08x\n", outarg.max_readahead);
1108 fprintf(stderr, " max_write=0x%08x\n", outarg.max_write);
1109 }
1110
1111 send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg));
1112}
1113
1114static void do_destroy(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
1115{
1116 struct fuse_ll *f = req->f;
1117
1118 (void) nodeid;
1119 (void) inarg;
1120
1121 f->got_destroy = 1;
1122 if (f->op.destroy)
1123 f->op.destroy(f->userdata);
1124
1125 send_reply_ok(req, NULL, 0);
1126}
1127
1128void *fuse_req_userdata(fuse_req_t req)
1129{
1130 return req->f->userdata;
1131}
1132
1133const struct fuse_ctx *fuse_req_ctx(fuse_req_t req)
1134{
1135 return &req->ctx;
1136}
1137
1138/*
1139 * The size of fuse_ctx got extended, so need to be careful about
1140 * incompatibility (i.e. a new binary cannot work with an old
1141 * library).
1142 */
1143const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req);
1144const struct fuse_ctx *fuse_req_ctx_compat24(fuse_req_t req)
1145{
1146 return fuse_req_ctx(req);
1147}
1148//FUSE_SYMVER(".symver fuse_req_ctx_compat24,fuse_req_ctx@FUSE_2.4");
1149
1150void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
1151 void *data)
1152{
1153 pthread_mutex_lock(&req->lock);
1154 req->u.ni.func = func;
1155 req->u.ni.data = data;
1156 if (req->interrupted && func)
1157 func(req, data);
1158 pthread_mutex_unlock(&req->lock);
1159}
1160
1161int fuse_req_interrupted(fuse_req_t req)
1162{
1163 int interrupted;
1164
1165 pthread_mutex_lock(&req->f->lock);
1166 interrupted = req->interrupted;
1167 pthread_mutex_unlock(&req->f->lock);
1168
1169 return interrupted;
1170}
1171
1172static struct {
1173 void (*func)(fuse_req_t, fuse_ino_t, const void *);
1174 const char *name;
1175} fuse_ll_ops[] = {
1176 [FUSE_LOOKUP] = { do_lookup, "LOOKUP" },
1177 [FUSE_FORGET] = { do_forget, "FORGET" },
1178 [FUSE_GETATTR] = { do_getattr, "GETATTR" },
1179 [FUSE_SETATTR] = { do_setattr, "SETATTR" },
1180 [FUSE_READLINK] = { do_readlink, "READLINK" },
1181 [FUSE_SYMLINK] = { do_symlink, "SYMLINK" },
1182 [FUSE_MKNOD] = { do_mknod, "MKNOD" },
1183 [FUSE_MKDIR] = { do_mkdir, "MKDIR" },
1184 [FUSE_UNLINK] = { do_unlink, "UNLINK" },
1185 [FUSE_RMDIR] = { do_rmdir, "RMDIR" },
1186 [FUSE_RENAME] = { do_rename, "RENAME" },
1187 [FUSE_LINK] = { do_link, "LINK" },
1188 [FUSE_OPEN] = { do_open, "OPEN" },
1189 [FUSE_READ] = { do_read, "READ" },
1190 [FUSE_WRITE] = { do_write, "WRITE" },
1191 [FUSE_STATFS] = { do_statfs, "STATFS" },
1192 [FUSE_RELEASE] = { do_release, "RELEASE" },
1193 [FUSE_FSYNC] = { do_fsync, "FSYNC" },
1194 [FUSE_SETXATTR] = { do_setxattr, "SETXATTR" },
1195 [FUSE_GETXATTR] = { do_getxattr, "GETXATTR" },
1196 [FUSE_LISTXATTR] = { do_listxattr, "LISTXATTR" },
1197 [FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" },
1198 [FUSE_FLUSH] = { do_flush, "FLUSH" },
1199 [FUSE_INIT] = { do_init, "INIT" },
1200 [FUSE_OPENDIR] = { do_opendir, "OPENDIR" },
1201 [FUSE_READDIR] = { do_readdir, "READDIR" },
1202 [FUSE_RELEASEDIR] = { do_releasedir, "RELEASEDIR" },
1203 [FUSE_FSYNCDIR] = { do_fsyncdir, "FSYNCDIR" },
1204 [FUSE_GETLK] = { do_getlk, "GETLK" },
1205 [FUSE_SETLK] = { do_setlk, "SETLK" },
1206 [FUSE_SETLKW] = { do_setlkw, "SETLKW" },
1207 [FUSE_ACCESS] = { do_access, "ACCESS" },
1208 [FUSE_CREATE] = { do_create, "CREATE" },
1209 [FUSE_INTERRUPT] = { do_interrupt, "INTERRUPT" },
1210 [FUSE_BMAP] = { do_bmap, "BMAP" },
1211 [FUSE_DESTROY] = { do_destroy, "DESTROY" },
1212};
1213
1214#define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
1215
1216static const char *opname(enum fuse_opcode opcode)
1217{
1218 if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name)
1219 return "???";
1220 else
1221 return fuse_ll_ops[opcode].name;
1222}
1223
1224static void fuse_ll_process(void *data, const char *buf, size_t len,
1225 struct fuse_chan *ch)
1226{
1227 struct fuse_ll *f = (struct fuse_ll *) data;
1228 const struct fuse_in_header *in = (const struct fuse_in_header *) buf;
1229 const void *inarg = buf + sizeof(struct fuse_in_header);
1230 struct fuse_req *req;
1231
1232 if (f->debug)
1233 fprintf(stderr, "unique: %llu, opcode: %s (%i), nodeid: %lu, insize: %zu\n",
1234 (unsigned long long) in->unique,
1235 opname((enum fuse_opcode) in->opcode), in->opcode,
1236 (unsigned long) in->nodeid, len);
1237
1238 req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req));
1239 if (req == NULL) {
1240 fprintf(stderr, "fuse: failed to allocate request\n");
1241 return;
1242 }
1243
1244 req->f = f;
1245 req->unique = in->unique;
1246 req->ctx.uid = in->uid;
1247 req->ctx.gid = in->gid;
1248 req->ctx.pid = in->pid;
1249 req->ch = ch;
1250 req->ctr = 1;
1251 list_init_req(req);
1252 fuse_mutex_init(&req->lock);
1253
1254 if (!f->got_init && in->opcode != FUSE_INIT)
1255 fuse_reply_err(req, EIO);
1256 else if (f->allow_root && in->uid != f->owner && in->uid != 0 &&
1257 in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
1258 in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
1259 in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
1260 in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR) {
1261 fuse_reply_err(req, EACCES);
1262 } else if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func)
1263 fuse_reply_err(req, ENOSYS);
1264 else {
1265 if (in->opcode != FUSE_INTERRUPT) {
1266 struct fuse_req *intr;
1267 pthread_mutex_lock(&f->lock);
1268 intr = check_interrupt(f, req);
1269 list_add_req(req, &f->list);
1270 pthread_mutex_unlock(&f->lock);
1271 if (intr)
1272 fuse_reply_err(intr, EAGAIN);
1273 }
1274 fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
1275 }
1276}
1277
1278enum {
1279 KEY_HELP,
1280 KEY_VERSION,
1281};
1282
1283static struct fuse_opt fuse_ll_opts[] = {
1284 { "debug", offsetof(struct fuse_ll, debug), 1 },
1285 { "-d", offsetof(struct fuse_ll, debug), 1 },
1286 { "allow_root", offsetof(struct fuse_ll, allow_root), 1 },
1287 { "max_write=%u", offsetof(struct fuse_ll, conn.max_write), 0 },
1288 { "max_readahead=%u", offsetof(struct fuse_ll, conn.max_readahead), 0 },
1289 { "async_read", offsetof(struct fuse_ll, conn.async_read), 1 },
1290 { "sync_read", offsetof(struct fuse_ll, conn.async_read), 0 },
1291 FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_DISCARD),
1292 FUSE_OPT_KEY("-h", KEY_HELP),
1293 FUSE_OPT_KEY("--help", KEY_HELP),
1294 FUSE_OPT_KEY("-V", KEY_VERSION),
1295 FUSE_OPT_KEY("--version", KEY_VERSION),
1296 FUSE_OPT_END
1297};
1298
1299static void fuse_ll_version(void)
1300{
1301 fprintf(stderr, "using FUSE kernel interface version %i.%i\n",
1302 FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
1303}
1304
1305static void fuse_ll_help(void)
1306{
1307 fprintf(stderr,
1308" -o max_write=N set maximum size of write requests\n"
1309" -o max_readahead=N set maximum readahead\n"
1310" -o async_read perform reads asynchronously (default)\n"
1311" -o sync_read perform reads synchronously\n");
1312}
1313
1314static int fuse_ll_opt_proc(void *data, const char *arg, int key,
1315 struct fuse_args *outargs)
1316{
1317 (void) data; (void) outargs;
1318
1319 switch (key) {
1320 case KEY_HELP:
1321 fuse_ll_help();
1322 break;
1323
1324 case KEY_VERSION:
1325 fuse_ll_version();
1326 break;
1327
1328 default:
1329 fprintf(stderr, "fuse: unknown option `%s'\n", arg);
1330 }
1331
1332 return -1;
1333}
1334
1335static void fuse_ll_destroy(void *data)
1336{
1337 struct fuse_ll *f = (struct fuse_ll *) data;
1338
1339 if (f->got_init && !f->got_destroy) {
1340 if (f->op.destroy)
1341 f->op.destroy(f->userdata);
1342 }
1343
1344 pthread_mutex_destroy(&f->lock);
1345 free(f);
1346}
1347
1348struct fuse_session *fuse_lowlevel_new(struct fuse_args *args,
1349 const struct fuse_lowlevel_ops *op,
1350 size_t op_size, void *userdata)
1351{
1352 struct fuse_ll *f;
1353 struct fuse_session *se;
1354 struct fuse_session_ops sop = {
1355 .process = fuse_ll_process,
1356 .destroy = fuse_ll_destroy,
1357 };
1358
1359 if (sizeof(struct fuse_lowlevel_ops) < op_size) {
1360 fprintf(stderr, "fuse: warning: library too old, some operations may not work\n");
1361 op_size = sizeof(struct fuse_lowlevel_ops);
1362 }
1363
1364 f = (struct fuse_ll *) calloc(1, sizeof(struct fuse_ll));
1365 if (f == NULL) {
1366 fprintf(stderr, "fuse: failed to allocate fuse object\n");
1367 goto out;
1368 }
1369
1370 f->conn.async_read = 1;
1371 f->conn.max_write = UINT_MAX;
1372 f->conn.max_readahead = UINT_MAX;
1373 list_init_req(&f->list);
1374 list_init_req(&f->interrupts);
1375 fuse_mutex_init(&f->lock);
1376
1377 if (fuse_opt_parse(args, f, fuse_ll_opts, fuse_ll_opt_proc) == -1)
1378 goto out_free;
1379
1380 memcpy(&f->op, op, op_size);
1381 f->owner = getuid();
1382 f->userdata = userdata;
1383
1384 se = fuse_session_new(&sop, f);
1385 if (!se)
1386 goto out_free;
1387
1388 return se;
1389
1390 out_free:
1391 free(f);
1392 out:
1393 return NULL;
1394}
1395
1396
generated by cgit at 2024-05-18 20:19:31 (GMT)