2 FUSE: Filesystem in Userspace
3 Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu>
5 This program can be distributed under the terms of the GNU GPL.
11 #include <linux/pagemap.h>
12 #include <linux/file.h>
13 #include <linux/gfp.h>
14 #include <linux/sched.h>
15 #include <linux/namei.h>
17 static inline unsigned long time_to_jiffies(unsigned long sec,
20 struct timespec ts = {sec, nsec};
21 return jiffies + timespec_to_jiffies(&ts);
24 static void fuse_lookup_init(struct fuse_req *req, struct inode *dir,
26 struct fuse_entry_out *outarg)
28 req->in.h.opcode = FUSE_LOOKUP;
29 req->in.h.nodeid = get_node_id(dir);
32 req->in.args[0].size = entry->d_name.len + 1;
33 req->in.args[0].value = entry->d_name.name;
35 req->out.args[0].size = sizeof(struct fuse_entry_out);
36 req->out.args[0].value = outarg;
39 static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
41 if (!entry->d_inode || is_bad_inode(entry->d_inode))
43 else if (time_after(jiffies, entry->d_time)) {
45 struct fuse_entry_out outarg;
46 struct inode *inode = entry->d_inode;
47 struct fuse_inode *fi = get_fuse_inode(inode);
48 struct fuse_conn *fc = get_fuse_conn(inode);
49 struct fuse_req *req = fuse_get_request(fc);
53 fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg);
54 request_send(fc, req);
55 err = req->out.h.error;
57 if (outarg.nodeid != get_node_id(inode)) {
58 fuse_send_forget(fc, req, outarg.nodeid, 1);
63 fuse_put_request(fc, req);
64 if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
67 fuse_change_attributes(inode, &outarg.attr);
68 entry->d_time = time_to_jiffies(outarg.entry_valid,
69 outarg.entry_valid_nsec);
70 fi->i_time = time_to_jiffies(outarg.attr_valid,
71 outarg.attr_valid_nsec);
76 static struct dentry_operations fuse_dentry_operations = {
77 .d_revalidate = fuse_dentry_revalidate,
80 static int fuse_lookup_iget(struct inode *dir, struct dentry *entry,
81 struct inode **inodep)
84 struct fuse_entry_out outarg;
85 struct inode *inode = NULL;
86 struct fuse_conn *fc = get_fuse_conn(dir);
89 if (entry->d_name.len > FUSE_NAME_MAX)
92 req = fuse_get_request(fc);
96 fuse_lookup_init(req, dir, entry, &outarg);
97 request_send(fc, req);
98 err = req->out.h.error;
99 if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID))
102 inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
105 fuse_send_forget(fc, req, outarg.nodeid, 1);
109 fuse_put_request(fc, req);
110 if (err && err != -ENOENT)
114 struct fuse_inode *fi = get_fuse_inode(inode);
115 entry->d_time = time_to_jiffies(outarg.entry_valid,
116 outarg.entry_valid_nsec);
117 fi->i_time = time_to_jiffies(outarg.attr_valid,
118 outarg.attr_valid_nsec);
121 entry->d_op = &fuse_dentry_operations;
126 void fuse_invalidate_attr(struct inode *inode)
128 get_fuse_inode(inode)->i_time = jiffies - 1;
131 static void fuse_invalidate_entry(struct dentry *entry)
134 entry->d_time = jiffies - 1;
137 static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
138 struct inode *dir, struct dentry *entry,
141 struct fuse_entry_out outarg;
143 struct fuse_inode *fi;
146 req->in.h.nodeid = get_node_id(dir);
148 req->out.numargs = 1;
149 req->out.args[0].size = sizeof(outarg);
150 req->out.args[0].value = &outarg;
151 request_send(fc, req);
152 err = req->out.h.error;
154 fuse_put_request(fc, req);
157 if (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID) {
158 fuse_put_request(fc, req);
161 inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
164 fuse_send_forget(fc, req, outarg.nodeid, 1);
167 fuse_put_request(fc, req);
169 /* Don't allow userspace to do really stupid things... */
170 if ((inode->i_mode ^ mode) & S_IFMT) {
175 entry->d_time = time_to_jiffies(outarg.entry_valid,
176 outarg.entry_valid_nsec);
178 fi = get_fuse_inode(inode);
179 fi->i_time = time_to_jiffies(outarg.attr_valid,
180 outarg.attr_valid_nsec);
182 d_instantiate(entry, inode);
183 fuse_invalidate_attr(dir);
187 static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
190 struct fuse_mknod_in inarg;
191 struct fuse_conn *fc = get_fuse_conn(dir);
192 struct fuse_req *req = fuse_get_request(fc);
196 memset(&inarg, 0, sizeof(inarg));
198 inarg.rdev = new_encode_dev(rdev);
199 req->in.h.opcode = FUSE_MKNOD;
201 req->in.args[0].size = sizeof(inarg);
202 req->in.args[0].value = &inarg;
203 req->in.args[1].size = entry->d_name.len + 1;
204 req->in.args[1].value = entry->d_name.name;
205 return create_new_entry(fc, req, dir, entry, mode);
208 static int fuse_create(struct inode *dir, struct dentry *entry, int mode,
209 struct nameidata *nd)
211 return fuse_mknod(dir, entry, mode, 0);
214 static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode)
216 struct fuse_mkdir_in inarg;
217 struct fuse_conn *fc = get_fuse_conn(dir);
218 struct fuse_req *req = fuse_get_request(fc);
222 memset(&inarg, 0, sizeof(inarg));
224 req->in.h.opcode = FUSE_MKDIR;
226 req->in.args[0].size = sizeof(inarg);
227 req->in.args[0].value = &inarg;
228 req->in.args[1].size = entry->d_name.len + 1;
229 req->in.args[1].value = entry->d_name.name;
230 return create_new_entry(fc, req, dir, entry, S_IFDIR);
233 static int fuse_symlink(struct inode *dir, struct dentry *entry,
236 struct fuse_conn *fc = get_fuse_conn(dir);
237 unsigned len = strlen(link) + 1;
238 struct fuse_req *req;
240 if (len > FUSE_SYMLINK_MAX)
241 return -ENAMETOOLONG;
243 req = fuse_get_request(fc);
247 req->in.h.opcode = FUSE_SYMLINK;
249 req->in.args[0].size = entry->d_name.len + 1;
250 req->in.args[0].value = entry->d_name.name;
251 req->in.args[1].size = len;
252 req->in.args[1].value = link;
253 return create_new_entry(fc, req, dir, entry, S_IFLNK);
256 static int fuse_unlink(struct inode *dir, struct dentry *entry)
259 struct fuse_conn *fc = get_fuse_conn(dir);
260 struct fuse_req *req = fuse_get_request(fc);
264 req->in.h.opcode = FUSE_UNLINK;
265 req->in.h.nodeid = get_node_id(dir);
268 req->in.args[0].size = entry->d_name.len + 1;
269 req->in.args[0].value = entry->d_name.name;
270 request_send(fc, req);
271 err = req->out.h.error;
272 fuse_put_request(fc, req);
274 struct inode *inode = entry->d_inode;
276 /* Set nlink to zero so the inode can be cleared, if
277 the inode does have more links this will be
278 discovered at the next lookup/getattr */
280 fuse_invalidate_attr(inode);
281 fuse_invalidate_attr(dir);
282 } else if (err == -EINTR)
283 fuse_invalidate_entry(entry);
287 static int fuse_rmdir(struct inode *dir, struct dentry *entry)
290 struct fuse_conn *fc = get_fuse_conn(dir);
291 struct fuse_req *req = fuse_get_request(fc);
295 req->in.h.opcode = FUSE_RMDIR;
296 req->in.h.nodeid = get_node_id(dir);
299 req->in.args[0].size = entry->d_name.len + 1;
300 req->in.args[0].value = entry->d_name.name;
301 request_send(fc, req);
302 err = req->out.h.error;
303 fuse_put_request(fc, req);
305 entry->d_inode->i_nlink = 0;
306 fuse_invalidate_attr(dir);
307 } else if (err == -EINTR)
308 fuse_invalidate_entry(entry);
312 static int fuse_rename(struct inode *olddir, struct dentry *oldent,
313 struct inode *newdir, struct dentry *newent)
316 struct fuse_rename_in inarg;
317 struct fuse_conn *fc = get_fuse_conn(olddir);
318 struct fuse_req *req = fuse_get_request(fc);
322 memset(&inarg, 0, sizeof(inarg));
323 inarg.newdir = get_node_id(newdir);
324 req->in.h.opcode = FUSE_RENAME;
325 req->in.h.nodeid = get_node_id(olddir);
327 req->inode2 = newdir;
329 req->in.args[0].size = sizeof(inarg);
330 req->in.args[0].value = &inarg;
331 req->in.args[1].size = oldent->d_name.len + 1;
332 req->in.args[1].value = oldent->d_name.name;
333 req->in.args[2].size = newent->d_name.len + 1;
334 req->in.args[2].value = newent->d_name.name;
335 request_send(fc, req);
336 err = req->out.h.error;
337 fuse_put_request(fc, req);
339 fuse_invalidate_attr(olddir);
340 if (olddir != newdir)
341 fuse_invalidate_attr(newdir);
342 } else if (err == -EINTR) {
343 /* If request was interrupted, DEITY only knows if the
344 rename actually took place. If the invalidation
345 fails (e.g. some process has CWD under the renamed
346 directory), then there can be inconsistency between
347 the dcache and the real filesystem. Tough luck. */
348 fuse_invalidate_entry(oldent);
350 fuse_invalidate_entry(newent);
356 static int fuse_link(struct dentry *entry, struct inode *newdir,
357 struct dentry *newent)
360 struct fuse_link_in inarg;
361 struct inode *inode = entry->d_inode;
362 struct fuse_conn *fc = get_fuse_conn(inode);
363 struct fuse_req *req = fuse_get_request(fc);
367 memset(&inarg, 0, sizeof(inarg));
368 inarg.oldnodeid = get_node_id(inode);
369 req->in.h.opcode = FUSE_LINK;
372 req->in.args[0].size = sizeof(inarg);
373 req->in.args[0].value = &inarg;
374 req->in.args[1].size = newent->d_name.len + 1;
375 req->in.args[1].value = newent->d_name.name;
376 err = create_new_entry(fc, req, newdir, newent, inode->i_mode);
377 /* Contrary to "normal" filesystems it can happen that link
378 makes two "logical" inodes point to the same "physical"
379 inode. We invalidate the attributes of the old one, so it
380 will reflect changes in the backing inode (link count,
383 if (!err || err == -EINTR)
384 fuse_invalidate_attr(inode);
388 int fuse_do_getattr(struct inode *inode)
391 struct fuse_attr_out arg;
392 struct fuse_conn *fc = get_fuse_conn(inode);
393 struct fuse_req *req = fuse_get_request(fc);
397 req->in.h.opcode = FUSE_GETATTR;
398 req->in.h.nodeid = get_node_id(inode);
400 req->out.numargs = 1;
401 req->out.args[0].size = sizeof(arg);
402 req->out.args[0].value = &arg;
403 request_send(fc, req);
404 err = req->out.h.error;
405 fuse_put_request(fc, req);
407 if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) {
408 make_bad_inode(inode);
411 struct fuse_inode *fi = get_fuse_inode(inode);
412 fuse_change_attributes(inode, &arg.attr);
413 fi->i_time = time_to_jiffies(arg.attr_valid,
414 arg.attr_valid_nsec);
421 * Calling into a user-controlled filesystem gives the filesystem
422 * daemon ptrace-like capabilities over the requester process. This
423 * means, that the filesystem daemon is able to record the exact
424 * filesystem operations performed, and can also control the behavior
425 * of the requester process in otherwise impossible ways. For example
426 * it can delay the operation for arbitrary length of time allowing
427 * DoS against the requester.
429 * For this reason only those processes can call into the filesystem,
430 * for which the owner of the mount has ptrace privilege. This
431 * excludes processes started by other users, suid or sgid processes.
433 static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
435 if (fc->flags & FUSE_ALLOW_OTHER)
438 if (task->euid == fc->user_id &&
439 task->suid == fc->user_id &&
440 task->uid == fc->user_id &&
441 task->egid == fc->group_id &&
442 task->sgid == fc->group_id &&
443 task->gid == fc->group_id)
449 static int fuse_revalidate(struct dentry *entry)
451 struct inode *inode = entry->d_inode;
452 struct fuse_inode *fi = get_fuse_inode(inode);
453 struct fuse_conn *fc = get_fuse_conn(inode);
455 if (!fuse_allow_task(fc, current))
457 if (get_node_id(inode) != FUSE_ROOT_ID &&
458 time_before_eq(jiffies, fi->i_time))
461 return fuse_do_getattr(inode);
464 static int fuse_access(struct inode *inode, int mask)
466 struct fuse_conn *fc = get_fuse_conn(inode);
467 struct fuse_req *req;
468 struct fuse_access_in inarg;
474 req = fuse_get_request(fc);
478 memset(&inarg, 0, sizeof(inarg));
480 req->in.h.opcode = FUSE_ACCESS;
481 req->in.h.nodeid = get_node_id(inode);
484 req->in.args[0].size = sizeof(inarg);
485 req->in.args[0].value = &inarg;
486 request_send(fc, req);
487 err = req->out.h.error;
488 fuse_put_request(fc, req);
489 if (err == -ENOSYS) {
496 static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
498 struct fuse_conn *fc = get_fuse_conn(inode);
500 if (!fuse_allow_task(fc, current))
502 else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
503 int err = generic_permission(inode, mask, NULL);
505 /* If permission is denied, try to refresh file
506 attributes. This is also needed, because the root
507 node will at first have no permissions */
508 if (err == -EACCES) {
509 err = fuse_do_getattr(inode);
511 err = generic_permission(inode, mask, NULL);
514 /* FIXME: Need some mechanism to revoke permissions:
515 currently if the filesystem suddenly changes the
516 file mode, we will not be informed about it, and
517 continue to allow access to the file/directory.
519 This is actually not so grave, since the user can
520 simply keep access to the file/directory anyway by
521 keeping it open... */
525 int mode = inode->i_mode;
526 if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO))
529 if (nd && (nd->flags & LOOKUP_ACCESS))
530 return fuse_access(inode, mask);
535 static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
536 void *dstbuf, filldir_t filldir)
538 while (nbytes >= FUSE_NAME_OFFSET) {
539 struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
540 size_t reclen = FUSE_DIRENT_SIZE(dirent);
542 if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX)
547 over = filldir(dstbuf, dirent->name, dirent->namelen,
548 file->f_pos, dirent->ino, dirent->type);
554 file->f_pos = dirent->off;
560 static inline size_t fuse_send_readdir(struct fuse_req *req, struct file *file,
561 struct inode *inode, loff_t pos,
564 return fuse_send_read_common(req, file, inode, pos, count, 1);
567 static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
572 struct inode *inode = file->f_dentry->d_inode;
573 struct fuse_conn *fc = get_fuse_conn(inode);
574 struct fuse_req *req = fuse_get_request(fc);
578 page = alloc_page(GFP_KERNEL);
580 fuse_put_request(fc, req);
584 req->pages[0] = page;
585 nbytes = fuse_send_readdir(req, file, inode, file->f_pos, PAGE_SIZE);
586 err = req->out.h.error;
587 fuse_put_request(fc, req);
589 err = parse_dirfile(page_address(page), nbytes, file, dstbuf,
593 fuse_invalidate_attr(inode); /* atime changed */
597 static char *read_link(struct dentry *dentry)
599 struct inode *inode = dentry->d_inode;
600 struct fuse_conn *fc = get_fuse_conn(inode);
601 struct fuse_req *req = fuse_get_request(fc);
605 return ERR_PTR(-EINTR);
607 link = (char *) __get_free_page(GFP_KERNEL);
609 link = ERR_PTR(-ENOMEM);
612 req->in.h.opcode = FUSE_READLINK;
613 req->in.h.nodeid = get_node_id(inode);
616 req->out.numargs = 1;
617 req->out.args[0].size = PAGE_SIZE - 1;
618 req->out.args[0].value = link;
619 request_send(fc, req);
620 if (req->out.h.error) {
621 free_page((unsigned long) link);
622 link = ERR_PTR(req->out.h.error);
624 link[req->out.args[0].size] = '\0';
626 fuse_put_request(fc, req);
627 fuse_invalidate_attr(inode); /* atime changed */
631 static void free_link(char *link)
634 free_page((unsigned long) link);
637 static void *fuse_follow_link(struct dentry *dentry, struct nameidata *nd)
639 nd_set_link(nd, read_link(dentry));
643 static void fuse_put_link(struct dentry *dentry, struct nameidata *nd, void *c)
645 free_link(nd_get_link(nd));
648 static int fuse_dir_open(struct inode *inode, struct file *file)
650 return fuse_open_common(inode, file, 1);
653 static int fuse_dir_release(struct inode *inode, struct file *file)
655 return fuse_release_common(inode, file, 1);
658 static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync)
660 /* nfsd can call this with no file */
661 return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
664 static unsigned iattr_to_fattr(struct iattr *iattr, struct fuse_attr *fattr)
666 unsigned ivalid = iattr->ia_valid;
669 memset(fattr, 0, sizeof(*fattr));
671 if (ivalid & ATTR_MODE)
672 fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode;
673 if (ivalid & ATTR_UID)
674 fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid;
675 if (ivalid & ATTR_GID)
676 fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid;
677 if (ivalid & ATTR_SIZE)
678 fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size;
679 /* You can only _set_ these together (they may change by themselves) */
680 if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) {
681 fvalid |= FATTR_ATIME | FATTR_MTIME;
682 fattr->atime = iattr->ia_atime.tv_sec;
683 fattr->mtime = iattr->ia_mtime.tv_sec;
689 static int fuse_setattr(struct dentry *entry, struct iattr *attr)
691 struct inode *inode = entry->d_inode;
692 struct fuse_conn *fc = get_fuse_conn(inode);
693 struct fuse_inode *fi = get_fuse_inode(inode);
694 struct fuse_req *req;
695 struct fuse_setattr_in inarg;
696 struct fuse_attr_out outarg;
700 if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
701 err = inode_change_ok(inode, attr);
706 if (attr->ia_valid & ATTR_SIZE) {
709 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
710 if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) {
711 send_sig(SIGXFSZ, current, 0);
716 req = fuse_get_request(fc);
720 memset(&inarg, 0, sizeof(inarg));
721 inarg.valid = iattr_to_fattr(attr, &inarg.attr);
722 req->in.h.opcode = FUSE_SETATTR;
723 req->in.h.nodeid = get_node_id(inode);
726 req->in.args[0].size = sizeof(inarg);
727 req->in.args[0].value = &inarg;
728 req->out.numargs = 1;
729 req->out.args[0].size = sizeof(outarg);
730 req->out.args[0].value = &outarg;
731 request_send(fc, req);
732 err = req->out.h.error;
733 fuse_put_request(fc, req);
735 if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
736 make_bad_inode(inode);
740 loff_t origsize = i_size_read(inode);
741 i_size_write(inode, outarg.attr.size);
742 if (origsize > outarg.attr.size)
743 vmtruncate(inode, outarg.attr.size);
745 fuse_change_attributes(inode, &outarg.attr);
746 fi->i_time = time_to_jiffies(outarg.attr_valid,
747 outarg.attr_valid_nsec);
749 } else if (err == -EINTR)
750 fuse_invalidate_attr(inode);
755 static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
758 struct inode *inode = entry->d_inode;
759 int err = fuse_revalidate(entry);
761 generic_fillattr(inode, stat);
766 static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
767 struct nameidata *nd)
770 int err = fuse_lookup_iget(dir, entry, &inode);
773 if (inode && S_ISDIR(inode->i_mode)) {
774 /* Don't allow creating an alias to a directory */
775 struct dentry *alias = d_find_alias(inode);
779 return ERR_PTR(-EIO);
786 static int fuse_setxattr(struct dentry *entry, const char *name,
787 const void *value, size_t size, int flags)
789 struct inode *inode = entry->d_inode;
790 struct fuse_conn *fc = get_fuse_conn(inode);
791 struct fuse_req *req;
792 struct fuse_setxattr_in inarg;
795 if (size > FUSE_XATTR_SIZE_MAX)
801 req = fuse_get_request(fc);
805 memset(&inarg, 0, sizeof(inarg));
808 req->in.h.opcode = FUSE_SETXATTR;
809 req->in.h.nodeid = get_node_id(inode);
812 req->in.args[0].size = sizeof(inarg);
813 req->in.args[0].value = &inarg;
814 req->in.args[1].size = strlen(name) + 1;
815 req->in.args[1].value = name;
816 req->in.args[2].size = size;
817 req->in.args[2].value = value;
818 request_send(fc, req);
819 err = req->out.h.error;
820 fuse_put_request(fc, req);
821 if (err == -ENOSYS) {
828 static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
829 void *value, size_t size)
831 struct inode *inode = entry->d_inode;
832 struct fuse_conn *fc = get_fuse_conn(inode);
833 struct fuse_req *req;
834 struct fuse_getxattr_in inarg;
835 struct fuse_getxattr_out outarg;
841 req = fuse_get_request(fc);
845 memset(&inarg, 0, sizeof(inarg));
847 req->in.h.opcode = FUSE_GETXATTR;
848 req->in.h.nodeid = get_node_id(inode);
851 req->in.args[0].size = sizeof(inarg);
852 req->in.args[0].value = &inarg;
853 req->in.args[1].size = strlen(name) + 1;
854 req->in.args[1].value = name;
855 /* This is really two different operations rolled into one */
856 req->out.numargs = 1;
859 req->out.args[0].size = size;
860 req->out.args[0].value = value;
862 req->out.args[0].size = sizeof(outarg);
863 req->out.args[0].value = &outarg;
865 request_send(fc, req);
866 ret = req->out.h.error;
868 ret = size ? req->out.args[0].size : outarg.size;
870 if (ret == -ENOSYS) {
875 fuse_put_request(fc, req);
879 static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
881 struct inode *inode = entry->d_inode;
882 struct fuse_conn *fc = get_fuse_conn(inode);
883 struct fuse_req *req;
884 struct fuse_getxattr_in inarg;
885 struct fuse_getxattr_out outarg;
888 if (fc->no_listxattr)
891 req = fuse_get_request(fc);
895 memset(&inarg, 0, sizeof(inarg));
897 req->in.h.opcode = FUSE_LISTXATTR;
898 req->in.h.nodeid = get_node_id(inode);
901 req->in.args[0].size = sizeof(inarg);
902 req->in.args[0].value = &inarg;
903 /* This is really two different operations rolled into one */
904 req->out.numargs = 1;
907 req->out.args[0].size = size;
908 req->out.args[0].value = list;
910 req->out.args[0].size = sizeof(outarg);
911 req->out.args[0].value = &outarg;
913 request_send(fc, req);
914 ret = req->out.h.error;
916 ret = size ? req->out.args[0].size : outarg.size;
918 if (ret == -ENOSYS) {
919 fc->no_listxattr = 1;
923 fuse_put_request(fc, req);
927 static int fuse_removexattr(struct dentry *entry, const char *name)
929 struct inode *inode = entry->d_inode;
930 struct fuse_conn *fc = get_fuse_conn(inode);
931 struct fuse_req *req;
934 if (fc->no_removexattr)
937 req = fuse_get_request(fc);
941 req->in.h.opcode = FUSE_REMOVEXATTR;
942 req->in.h.nodeid = get_node_id(inode);
945 req->in.args[0].size = strlen(name) + 1;
946 req->in.args[0].value = name;
947 request_send(fc, req);
948 err = req->out.h.error;
949 fuse_put_request(fc, req);
950 if (err == -ENOSYS) {
951 fc->no_removexattr = 1;
957 static struct inode_operations fuse_dir_inode_operations = {
958 .lookup = fuse_lookup,
960 .symlink = fuse_symlink,
961 .unlink = fuse_unlink,
963 .rename = fuse_rename,
965 .setattr = fuse_setattr,
966 .create = fuse_create,
968 .permission = fuse_permission,
969 .getattr = fuse_getattr,
970 .setxattr = fuse_setxattr,
971 .getxattr = fuse_getxattr,
972 .listxattr = fuse_listxattr,
973 .removexattr = fuse_removexattr,
976 static struct file_operations fuse_dir_operations = {
977 .llseek = generic_file_llseek,
978 .read = generic_read_dir,
979 .readdir = fuse_readdir,
980 .open = fuse_dir_open,
981 .release = fuse_dir_release,
982 .fsync = fuse_dir_fsync,
985 static struct inode_operations fuse_common_inode_operations = {
986 .setattr = fuse_setattr,
987 .permission = fuse_permission,
988 .getattr = fuse_getattr,
989 .setxattr = fuse_setxattr,
990 .getxattr = fuse_getxattr,
991 .listxattr = fuse_listxattr,
992 .removexattr = fuse_removexattr,
995 static struct inode_operations fuse_symlink_inode_operations = {
996 .setattr = fuse_setattr,
997 .follow_link = fuse_follow_link,
998 .put_link = fuse_put_link,
999 .readlink = generic_readlink,
1000 .getattr = fuse_getattr,
1001 .setxattr = fuse_setxattr,
1002 .getxattr = fuse_getxattr,
1003 .listxattr = fuse_listxattr,
1004 .removexattr = fuse_removexattr,
1007 void fuse_init_common(struct inode *inode)
1009 inode->i_op = &fuse_common_inode_operations;
1012 void fuse_init_dir(struct inode *inode)
1014 inode->i_op = &fuse_dir_inode_operations;
1015 inode->i_fop = &fuse_dir_operations;
1018 void fuse_init_symlink(struct inode *inode)
1020 inode->i_op = &fuse_symlink_inode_operations;