1 /* * This file is part of UBIFS.
3 * Copyright (C) 2006-2008 Nokia Corporation.
4 * Copyright (C) 2006, 2007 University of Szeged, Hungary
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 51
17 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Authors: Artem Bityutskiy (Битюцкий Артём)
25 * This file implements directory operations.
27 * All FS operations in this file allocate budget before writing anything to the
28 * media. If they fail to allocate it, the error is returned. The only
29 * exceptions are 'ubifs_unlink()' and 'ubifs_rmdir()' which keep working even
30 * if they unable to allocate the budget, because deletion %-ENOSPC failure is
31 * not what users are usually ready to get. UBIFS budgeting subsystem has some
32 * space reserved for these purposes.
34 * All operations in this file write all inodes which they change straight
35 * away, instead of marking them dirty. For example, 'ubifs_link()' changes
36 * @i_size of the parent inode and writes the parent inode together with the
37 * target inode. This was done to simplify file-system recovery which would
38 * otherwise be very difficult to do. The only exception is rename which marks
39 * the re-named inode dirty (because its @i_ctime is updated) but does not
40 * write it, but just marks it as dirty.
46 * inherit_flags - inherit flags of the parent inode.
48 * @mode: new inode mode flags
50 * This is a helper function for 'ubifs_new_inode()' which inherits flag of the
51 * parent directory inode @dir. UBIFS inodes inherit the following flags:
52 * o %UBIFS_COMPR_FL, which is useful to switch compression on/of on
53 * sub-directory basis;
54 * o %UBIFS_SYNC_FL - useful for the same reasons;
55 * o %UBIFS_DIRSYNC_FL - similar, but relevant only to directories.
57 * This function returns the inherited flags.
59 static int inherit_flags(const struct inode *dir, umode_t mode)
62 const struct ubifs_inode *ui = ubifs_inode(dir);
64 if (!S_ISDIR(dir->i_mode))
66 * The parent is not a directory, which means that an extended
67 * attribute inode is being created. No flags.
71 flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL);
73 /* The "DIRSYNC" flag only applies to directories */
74 flags &= ~UBIFS_DIRSYNC_FL;
79 * ubifs_new_inode - allocate new UBIFS inode object.
80 * @c: UBIFS file-system description object
81 * @dir: parent directory inode
82 * @mode: inode mode flags
84 * This function finds an unused inode number, allocates new inode and
85 * initializes it. Returns new inode in case of success and an error code in
88 struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
93 struct ubifs_inode *ui;
94 bool encrypted = false;
96 if (ubifs_crypt_is_encrypted(dir)) {
97 err = fscrypt_get_encryption_info(dir);
99 ubifs_err(c, "fscrypt_get_encryption_info failed: %i", err);
103 if (!fscrypt_has_encryption_key(dir))
104 return ERR_PTR(-EPERM);
109 inode = new_inode(c->vfs_sb);
110 ui = ubifs_inode(inode);
112 return ERR_PTR(-ENOMEM);
115 * Set 'S_NOCMTIME' to prevent VFS form updating [mc]time of inodes and
116 * marking them dirty in file write path (see 'file_update_time()').
117 * UBIFS has to fully control "clean <-> dirty" transitions of inodes
118 * to make budgeting work.
120 inode->i_flags |= S_NOCMTIME;
122 inode_init_owner(inode, dir, mode);
123 inode->i_mtime = inode->i_atime = inode->i_ctime =
125 inode->i_mapping->nrpages = 0;
127 switch (mode & S_IFMT) {
129 inode->i_mapping->a_ops = &ubifs_file_address_operations;
130 inode->i_op = &ubifs_file_inode_operations;
131 inode->i_fop = &ubifs_file_operations;
134 inode->i_op = &ubifs_dir_inode_operations;
135 inode->i_fop = &ubifs_dir_operations;
136 inode->i_size = ui->ui_size = UBIFS_INO_NODE_SZ;
139 inode->i_op = &ubifs_symlink_inode_operations;
145 inode->i_op = &ubifs_file_inode_operations;
152 ui->flags = inherit_flags(dir, mode);
153 ubifs_set_inode_flags(inode);
155 ui->compr_type = c->default_compr;
157 ui->compr_type = UBIFS_COMPR_NONE;
158 ui->synced_i_size = 0;
160 spin_lock(&c->cnt_lock);
161 /* Inode number overflow is currently not supported */
162 if (c->highest_inum >= INUM_WARN_WATERMARK) {
163 if (c->highest_inum >= INUM_WATERMARK) {
164 spin_unlock(&c->cnt_lock);
165 ubifs_err(c, "out of inode numbers");
166 make_bad_inode(inode);
168 return ERR_PTR(-EINVAL);
170 ubifs_warn(c, "running out of inode numbers (current %lu, max %u)",
171 (unsigned long)c->highest_inum, INUM_WATERMARK);
174 inode->i_ino = ++c->highest_inum;
176 * The creation sequence number remains with this inode for its
177 * lifetime. All nodes for this inode have a greater sequence number,
178 * and so it is possible to distinguish obsolete nodes belonging to a
179 * previous incarnation of the same inode number - for example, for the
180 * purpose of rebuilding the index.
182 ui->creat_sqnum = ++c->max_sqnum;
183 spin_unlock(&c->cnt_lock);
186 err = fscrypt_inherit_context(dir, inode, &encrypted, true);
188 ubifs_err(c, "fscrypt_inherit_context failed: %i", err);
189 make_bad_inode(inode);
198 static int dbg_check_name(const struct ubifs_info *c,
199 const struct ubifs_dent_node *dent,
200 const struct fscrypt_name *nm)
202 if (!dbg_is_chk_gen(c))
204 if (le16_to_cpu(dent->nlen) != fname_len(nm))
206 if (memcmp(dent->name, fname_name(nm), fname_len(nm)))
211 static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
216 struct inode *inode = NULL;
217 struct ubifs_dent_node *dent;
218 struct ubifs_info *c = dir->i_sb->s_fs_info;
219 struct fscrypt_name nm;
221 dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);
223 if (ubifs_crypt_is_encrypted(dir)) {
224 err = fscrypt_get_encryption_info(dir);
227 * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
228 * created while the directory was encrypted and we
229 * have access to the key.
231 if (fscrypt_has_encryption_key(dir))
232 fscrypt_set_encrypted_dentry(dentry);
233 fscrypt_set_d_op(dentry);
234 if (err && err != -ENOKEY)
238 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
242 if (fname_len(&nm) > UBIFS_MAX_NLEN) {
247 dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
254 ubifs_assert(fname_len(&nm) == 0);
255 ubifs_assert(fname_name(&nm) == NULL);
256 if (nm.hash & ~UBIFS_S_KEY_HASH_MASK)
257 goto done; /* ENOENT */
258 dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
259 err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
261 dent_key_init(c, &key, dir->i_ino, &nm);
262 err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
266 if (err == -ENOENT) {
267 dbg_gen("not found");
273 if (dbg_check_name(c, dent, &nm)) {
278 inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
281 * This should not happen. Probably the file-system needs
284 err = PTR_ERR(inode);
285 ubifs_err(c, "dead directory entry '%pd', error %d",
287 ubifs_ro_mode(c, err);
291 if (ubifs_crypt_is_encrypted(dir) &&
292 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
293 !fscrypt_has_permitted_context(dir, inode)) {
294 ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
295 dir->i_ino, inode->i_ino);
302 fscrypt_free_filename(&nm);
304 * Note, d_splice_alias() would be required instead if we supported
307 d_add(dentry, inode);
315 fscrypt_free_filename(&nm);
319 static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
323 struct ubifs_info *c = dir->i_sb->s_fs_info;
324 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
326 struct ubifs_inode *dir_ui = ubifs_inode(dir);
327 struct fscrypt_name nm;
331 * Budget request settings: new inode, new direntry, changing the
332 * parent directory inode.
335 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
336 dentry, mode, dir->i_ino);
338 err = ubifs_budget_space(c, &req);
342 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
346 sz_change = CALC_DENT_SIZE(fname_len(&nm));
348 inode = ubifs_new_inode(c, dir, mode);
350 err = PTR_ERR(inode);
354 err = ubifs_init_security(dir, inode, &dentry->d_name);
358 mutex_lock(&dir_ui->ui_mutex);
359 dir->i_size += sz_change;
360 dir_ui->ui_size = dir->i_size;
361 dir->i_mtime = dir->i_ctime = inode->i_ctime;
362 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
365 mutex_unlock(&dir_ui->ui_mutex);
367 ubifs_release_budget(c, &req);
368 fscrypt_free_filename(&nm);
369 insert_inode_hash(inode);
370 d_instantiate(dentry, inode);
374 dir->i_size -= sz_change;
375 dir_ui->ui_size = dir->i_size;
376 mutex_unlock(&dir_ui->ui_mutex);
378 make_bad_inode(inode);
381 fscrypt_free_filename(&nm);
383 ubifs_release_budget(c, &req);
384 ubifs_err(c, "cannot create regular file, error %d", err);
388 static int do_tmpfile(struct inode *dir, struct dentry *dentry,
389 umode_t mode, struct inode **whiteout)
392 struct ubifs_info *c = dir->i_sb->s_fs_info;
393 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1};
394 struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
395 struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir);
396 int err, instantiated = 0;
397 struct fscrypt_name nm;
400 * Budget request settings: new dirty inode, new direntry,
401 * budget for dirtied inode will be released via writeback.
404 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
405 dentry, mode, dir->i_ino);
407 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
411 err = ubifs_budget_space(c, &req);
413 fscrypt_free_filename(&nm);
417 err = ubifs_budget_space(c, &ino_req);
419 ubifs_release_budget(c, &req);
420 fscrypt_free_filename(&nm);
424 inode = ubifs_new_inode(c, dir, mode);
426 err = PTR_ERR(inode);
429 ui = ubifs_inode(inode);
432 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
433 ubifs_assert(inode->i_op == &ubifs_file_inode_operations);
436 err = ubifs_init_security(dir, inode, &dentry->d_name);
440 mutex_lock(&ui->ui_mutex);
441 insert_inode_hash(inode);
444 mark_inode_dirty(inode);
448 d_tmpfile(dentry, inode);
450 ubifs_assert(ui->dirty);
453 mutex_unlock(&ui->ui_mutex);
455 mutex_lock(&dir_ui->ui_mutex);
456 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
459 mutex_unlock(&dir_ui->ui_mutex);
461 ubifs_release_budget(c, &req);
466 mutex_unlock(&dir_ui->ui_mutex);
468 make_bad_inode(inode);
472 ubifs_release_budget(c, &req);
474 ubifs_release_budget(c, &ino_req);
475 fscrypt_free_filename(&nm);
476 ubifs_err(c, "cannot create temporary file, error %d", err);
480 static int ubifs_tmpfile(struct inode *dir, struct dentry *dentry,
483 return do_tmpfile(dir, dentry, mode, NULL);
487 * vfs_dent_type - get VFS directory entry type.
488 * @type: UBIFS directory entry type
490 * This function converts UBIFS directory entry type into VFS directory entry
493 static unsigned int vfs_dent_type(uint8_t type)
496 case UBIFS_ITYPE_REG:
498 case UBIFS_ITYPE_DIR:
500 case UBIFS_ITYPE_LNK:
502 case UBIFS_ITYPE_BLK:
504 case UBIFS_ITYPE_CHR:
506 case UBIFS_ITYPE_FIFO:
508 case UBIFS_ITYPE_SOCK:
517 * The classical Unix view for directory is that it is a linear array of
518 * (name, inode number) entries. Linux/VFS assumes this model as well.
519 * Particularly, 'readdir()' call wants us to return a directory entry offset
520 * which later may be used to continue 'readdir()'ing the directory or to
521 * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
522 * model because directory entries are identified by keys, which may collide.
524 * UBIFS uses directory entry hash value for directory offsets, so
525 * 'seekdir()'/'telldir()' may not always work because of possible key
526 * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
527 * properly by means of saving full directory entry name in the private field
528 * of the file description object.
530 * This means that UBIFS cannot support NFS which requires full
531 * 'seekdir()'/'telldir()' support.
533 static int ubifs_readdir(struct file *file, struct dir_context *ctx)
535 int fstr_real_len = 0, err = 0;
536 struct fscrypt_name nm;
537 struct fscrypt_str fstr = {0};
539 struct ubifs_dent_node *dent;
540 struct inode *dir = file_inode(file);
541 struct ubifs_info *c = dir->i_sb->s_fs_info;
542 bool encrypted = ubifs_crypt_is_encrypted(dir);
544 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
546 if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
548 * The directory was seek'ed to a senseless position or there
549 * are no more entries.
554 err = fscrypt_get_encryption_info(dir);
555 if (err && err != -ENOKEY)
558 err = fscrypt_fname_alloc_buffer(dir, UBIFS_MAX_NLEN, &fstr);
562 fstr_real_len = fstr.len;
565 if (file->f_version == 0) {
567 * The file was seek'ed, which means that @file->private_data
568 * is now invalid. This may also be just the first
569 * 'ubifs_readdir()' invocation, in which case
570 * @file->private_data is NULL, and the below code is
573 kfree(file->private_data);
574 file->private_data = NULL;
578 * 'generic_file_llseek()' unconditionally sets @file->f_version to
579 * zero, and we use this for detecting whether the file was seek'ed.
583 /* File positions 0 and 1 correspond to "." and ".." */
585 ubifs_assert(!file->private_data);
586 if (!dir_emit_dots(file, ctx)) {
588 fscrypt_fname_free_buffer(&fstr);
592 /* Find the first entry in TNC and save it */
593 lowest_dent_key(c, &key, dir->i_ino);
595 dent = ubifs_tnc_next_ent(c, &key, &nm);
601 ctx->pos = key_hash_flash(c, &dent->key);
602 file->private_data = dent;
605 dent = file->private_data;
608 * The directory was seek'ed to and is now readdir'ed.
609 * Find the entry corresponding to @ctx->pos or the closest one.
611 dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
613 dent = ubifs_tnc_next_ent(c, &key, &nm);
618 ctx->pos = key_hash_flash(c, &dent->key);
619 file->private_data = dent;
623 dbg_gen("ino %llu, new f_pos %#x",
624 (unsigned long long)le64_to_cpu(dent->inum),
625 key_hash_flash(c, &dent->key));
626 ubifs_assert(le64_to_cpu(dent->ch.sqnum) >
627 ubifs_inode(dir)->creat_sqnum);
629 fname_len(&nm) = le16_to_cpu(dent->nlen);
630 fname_name(&nm) = dent->name;
633 fstr.len = fstr_real_len;
635 err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c,
637 le32_to_cpu(dent->cookie),
638 &nm.disk_name, &fstr);
642 fstr.len = fname_len(&nm);
643 fstr.name = fname_name(&nm);
646 if (!dir_emit(ctx, fstr.name, fstr.len,
647 le64_to_cpu(dent->inum),
648 vfs_dent_type(dent->type))) {
650 fscrypt_fname_free_buffer(&fstr);
654 /* Switch to the next entry */
655 key_read(c, &dent->key, &key);
656 dent = ubifs_tnc_next_ent(c, &key, &nm);
662 kfree(file->private_data);
663 ctx->pos = key_hash_flash(c, &dent->key);
664 file->private_data = dent;
669 kfree(file->private_data);
670 file->private_data = NULL;
673 fscrypt_fname_free_buffer(&fstr);
676 ubifs_err(c, "cannot find next direntry, error %d", err);
679 * -ENOENT is a non-fatal error in this context, the TNC uses
680 * it to indicate that the cursor moved past the current directory
681 * and readdir() has to stop.
686 /* 2 is a special value indicating that there are no more direntries */
691 /* Free saved readdir() state when the directory is closed */
692 static int ubifs_dir_release(struct inode *dir, struct file *file)
694 kfree(file->private_data);
695 file->private_data = NULL;
700 * lock_2_inodes - a wrapper for locking two UBIFS inodes.
701 * @inode1: first inode
702 * @inode2: second inode
704 * We do not implement any tricks to guarantee strict lock ordering, because
705 * VFS has already done it for us on the @i_mutex. So this is just a simple
708 static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
710 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
711 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
715 * unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
716 * @inode1: first inode
717 * @inode2: second inode
719 static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
721 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
722 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
725 static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
726 struct dentry *dentry)
728 struct ubifs_info *c = dir->i_sb->s_fs_info;
729 struct inode *inode = d_inode(old_dentry);
730 struct ubifs_inode *ui = ubifs_inode(inode);
731 struct ubifs_inode *dir_ui = ubifs_inode(dir);
732 int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
733 struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
734 .dirtied_ino_d = ALIGN(ui->data_len, 8) };
735 struct fscrypt_name nm;
738 * Budget request settings: new direntry, changing the target inode,
739 * changing the parent inode.
742 dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
743 dentry, inode->i_ino,
744 inode->i_nlink, dir->i_ino);
745 ubifs_assert(inode_is_locked(dir));
746 ubifs_assert(inode_is_locked(inode));
748 if (ubifs_crypt_is_encrypted(dir) &&
749 !fscrypt_has_permitted_context(dir, inode))
752 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
756 err = dbg_check_synced_i_size(c, inode);
760 err = ubifs_budget_space(c, &req);
764 lock_2_inodes(dir, inode);
766 /* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
767 if (inode->i_nlink == 0)
768 ubifs_delete_orphan(c, inode->i_ino);
772 inode->i_ctime = current_time(inode);
773 dir->i_size += sz_change;
774 dir_ui->ui_size = dir->i_size;
775 dir->i_mtime = dir->i_ctime = inode->i_ctime;
776 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
779 unlock_2_inodes(dir, inode);
781 ubifs_release_budget(c, &req);
782 d_instantiate(dentry, inode);
783 fscrypt_free_filename(&nm);
787 dir->i_size -= sz_change;
788 dir_ui->ui_size = dir->i_size;
790 if (inode->i_nlink == 0)
791 ubifs_add_orphan(c, inode->i_ino);
792 unlock_2_inodes(dir, inode);
793 ubifs_release_budget(c, &req);
796 fscrypt_free_filename(&nm);
800 static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
802 struct ubifs_info *c = dir->i_sb->s_fs_info;
803 struct inode *inode = d_inode(dentry);
804 struct ubifs_inode *dir_ui = ubifs_inode(dir);
805 int err, sz_change, budgeted = 1;
806 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
807 unsigned int saved_nlink = inode->i_nlink;
808 struct fscrypt_name nm;
811 * Budget request settings: deletion direntry, deletion inode (+1 for
812 * @dirtied_ino), changing the parent directory inode. If budgeting
813 * fails, go ahead anyway because we have extra space reserved for
817 dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
818 dentry, inode->i_ino,
819 inode->i_nlink, dir->i_ino);
821 if (ubifs_crypt_is_encrypted(dir)) {
822 err = fscrypt_get_encryption_info(dir);
823 if (err && err != -ENOKEY)
827 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
831 sz_change = CALC_DENT_SIZE(fname_len(&nm));
833 ubifs_assert(inode_is_locked(dir));
834 ubifs_assert(inode_is_locked(inode));
835 err = dbg_check_synced_i_size(c, inode);
839 err = ubifs_budget_space(c, &req);
846 lock_2_inodes(dir, inode);
847 inode->i_ctime = current_time(dir);
849 dir->i_size -= sz_change;
850 dir_ui->ui_size = dir->i_size;
851 dir->i_mtime = dir->i_ctime = inode->i_ctime;
852 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
855 unlock_2_inodes(dir, inode);
858 ubifs_release_budget(c, &req);
860 /* We've deleted something - clean the "no space" flags */
861 c->bi.nospace = c->bi.nospace_rp = 0;
864 fscrypt_free_filename(&nm);
868 dir->i_size += sz_change;
869 dir_ui->ui_size = dir->i_size;
870 set_nlink(inode, saved_nlink);
871 unlock_2_inodes(dir, inode);
873 ubifs_release_budget(c, &req);
875 fscrypt_free_filename(&nm);
880 * check_dir_empty - check if a directory is empty or not.
881 * @dir: VFS inode object of the directory to check
883 * This function checks if directory @dir is empty. Returns zero if the
884 * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
885 * in case of of errors.
887 int ubifs_check_dir_empty(struct inode *dir)
889 struct ubifs_info *c = dir->i_sb->s_fs_info;
890 struct fscrypt_name nm = { 0 };
891 struct ubifs_dent_node *dent;
895 lowest_dent_key(c, &key, dir->i_ino);
896 dent = ubifs_tnc_next_ent(c, &key, &nm);
908 static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
910 struct ubifs_info *c = dir->i_sb->s_fs_info;
911 struct inode *inode = d_inode(dentry);
912 int err, sz_change, budgeted = 1;
913 struct ubifs_inode *dir_ui = ubifs_inode(dir);
914 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
915 struct fscrypt_name nm;
918 * Budget request settings: deletion direntry, deletion inode and
919 * changing the parent inode. If budgeting fails, go ahead anyway
920 * because we have extra space reserved for deletions.
923 dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
924 inode->i_ino, dir->i_ino);
925 ubifs_assert(inode_is_locked(dir));
926 ubifs_assert(inode_is_locked(inode));
927 err = ubifs_check_dir_empty(d_inode(dentry));
931 if (ubifs_crypt_is_encrypted(dir)) {
932 err = fscrypt_get_encryption_info(dir);
933 if (err && err != -ENOKEY)
937 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
941 sz_change = CALC_DENT_SIZE(fname_len(&nm));
943 err = ubifs_budget_space(c, &req);
950 lock_2_inodes(dir, inode);
951 inode->i_ctime = current_time(dir);
954 dir->i_size -= sz_change;
955 dir_ui->ui_size = dir->i_size;
956 dir->i_mtime = dir->i_ctime = inode->i_ctime;
957 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
960 unlock_2_inodes(dir, inode);
963 ubifs_release_budget(c, &req);
965 /* We've deleted something - clean the "no space" flags */
966 c->bi.nospace = c->bi.nospace_rp = 0;
969 fscrypt_free_filename(&nm);
973 dir->i_size += sz_change;
974 dir_ui->ui_size = dir->i_size;
977 unlock_2_inodes(dir, inode);
979 ubifs_release_budget(c, &req);
981 fscrypt_free_filename(&nm);
985 static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
988 struct ubifs_inode *dir_ui = ubifs_inode(dir);
989 struct ubifs_info *c = dir->i_sb->s_fs_info;
991 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
992 struct fscrypt_name nm;
995 * Budget request settings: new inode, new direntry and changing parent
999 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
1000 dentry, mode, dir->i_ino);
1002 err = ubifs_budget_space(c, &req);
1006 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1010 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1012 inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
1013 if (IS_ERR(inode)) {
1014 err = PTR_ERR(inode);
1018 err = ubifs_init_security(dir, inode, &dentry->d_name);
1022 mutex_lock(&dir_ui->ui_mutex);
1023 insert_inode_hash(inode);
1026 dir->i_size += sz_change;
1027 dir_ui->ui_size = dir->i_size;
1028 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1029 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1031 ubifs_err(c, "cannot create directory, error %d", err);
1034 mutex_unlock(&dir_ui->ui_mutex);
1036 ubifs_release_budget(c, &req);
1037 d_instantiate(dentry, inode);
1038 fscrypt_free_filename(&nm);
1042 dir->i_size -= sz_change;
1043 dir_ui->ui_size = dir->i_size;
1045 mutex_unlock(&dir_ui->ui_mutex);
1047 make_bad_inode(inode);
1050 fscrypt_free_filename(&nm);
1052 ubifs_release_budget(c, &req);
1056 static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
1057 umode_t mode, dev_t rdev)
1059 struct inode *inode;
1060 struct ubifs_inode *ui;
1061 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1062 struct ubifs_info *c = dir->i_sb->s_fs_info;
1063 union ubifs_dev_desc *dev = NULL;
1065 int err, devlen = 0;
1066 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1068 struct fscrypt_name nm;
1071 * Budget request settings: new inode, new direntry and changing parent
1075 dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
1077 if (S_ISBLK(mode) || S_ISCHR(mode)) {
1078 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1081 devlen = ubifs_encode_dev(dev, rdev);
1084 req.new_ino_d = ALIGN(devlen, 8);
1085 err = ubifs_budget_space(c, &req);
1091 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1097 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1099 inode = ubifs_new_inode(c, dir, mode);
1100 if (IS_ERR(inode)) {
1102 err = PTR_ERR(inode);
1106 init_special_inode(inode, inode->i_mode, rdev);
1107 inode->i_size = ubifs_inode(inode)->ui_size = devlen;
1108 ui = ubifs_inode(inode);
1110 ui->data_len = devlen;
1112 err = ubifs_init_security(dir, inode, &dentry->d_name);
1116 mutex_lock(&dir_ui->ui_mutex);
1117 dir->i_size += sz_change;
1118 dir_ui->ui_size = dir->i_size;
1119 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1120 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1123 mutex_unlock(&dir_ui->ui_mutex);
1125 ubifs_release_budget(c, &req);
1126 insert_inode_hash(inode);
1127 d_instantiate(dentry, inode);
1128 fscrypt_free_filename(&nm);
1132 dir->i_size -= sz_change;
1133 dir_ui->ui_size = dir->i_size;
1134 mutex_unlock(&dir_ui->ui_mutex);
1136 make_bad_inode(inode);
1139 fscrypt_free_filename(&nm);
1141 ubifs_release_budget(c, &req);
1145 static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
1146 const char *symname)
1148 struct inode *inode;
1149 struct ubifs_inode *ui;
1150 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1151 struct ubifs_info *c = dir->i_sb->s_fs_info;
1152 int err, sz_change, len = strlen(symname);
1153 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
1154 struct fscrypt_symlink_data *sd = NULL;
1155 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1156 .new_ino_d = ALIGN(len, 8),
1158 struct fscrypt_name nm;
1160 if (ubifs_crypt_is_encrypted(dir)) {
1161 err = fscrypt_get_encryption_info(dir);
1165 if (!fscrypt_has_encryption_key(dir)) {
1170 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
1171 sizeof(struct fscrypt_symlink_data));
1175 * Budget request settings: new inode, new direntry and changing parent
1179 dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
1180 symname, dir->i_ino);
1182 if (disk_link.len > UBIFS_MAX_INO_DATA)
1183 return -ENAMETOOLONG;
1185 err = ubifs_budget_space(c, &req);
1189 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1193 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1195 inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
1196 if (IS_ERR(inode)) {
1197 err = PTR_ERR(inode);
1201 ui = ubifs_inode(inode);
1202 ui->data = kmalloc(disk_link.len, GFP_NOFS);
1208 if (ubifs_crypt_is_encrypted(dir)) {
1209 struct qstr istr = QSTR_INIT(symname, len);
1210 struct fscrypt_str ostr;
1212 sd = kzalloc(disk_link.len, GFP_NOFS);
1218 ostr.name = sd->encrypted_path;
1219 ostr.len = disk_link.len;
1221 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
1225 sd->len = cpu_to_le16(ostr.len);
1226 disk_link.name = (char *)sd;
1228 inode->i_link = ui->data;
1231 memcpy(ui->data, disk_link.name, disk_link.len);
1232 ((char *)ui->data)[disk_link.len - 1] = '\0';
1235 * The terminating zero byte is not written to the flash media and it
1236 * is put just to make later in-memory string processing simpler. Thus,
1237 * data length is @len, not @len + %1.
1239 ui->data_len = disk_link.len - 1;
1240 inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
1242 err = ubifs_init_security(dir, inode, &dentry->d_name);
1246 mutex_lock(&dir_ui->ui_mutex);
1247 dir->i_size += sz_change;
1248 dir_ui->ui_size = dir->i_size;
1249 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1250 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1253 mutex_unlock(&dir_ui->ui_mutex);
1255 insert_inode_hash(inode);
1256 d_instantiate(dentry, inode);
1261 dir->i_size -= sz_change;
1262 dir_ui->ui_size = dir->i_size;
1263 mutex_unlock(&dir_ui->ui_mutex);
1265 make_bad_inode(inode);
1268 fscrypt_free_filename(&nm);
1270 ubifs_release_budget(c, &req);
1276 * lock_4_inodes - a wrapper for locking three UBIFS inodes.
1277 * @inode1: first inode
1278 * @inode2: second inode
1279 * @inode3: third inode
1280 * @inode4: fouth inode
1282 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
1283 * @inode2 whereas @inode3 and @inode4 may be %NULL.
1285 * We do not implement any tricks to guarantee strict lock ordering, because
1286 * VFS has already done it for us on the @i_mutex. So this is just a simple
1289 static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
1290 struct inode *inode3, struct inode *inode4)
1292 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
1293 if (inode2 != inode1)
1294 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
1296 mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
1298 mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
1302 * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
1303 * @inode1: first inode
1304 * @inode2: second inode
1305 * @inode3: third inode
1306 * @inode4: fouth inode
1308 static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
1309 struct inode *inode3, struct inode *inode4)
1312 mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
1314 mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
1315 if (inode1 != inode2)
1316 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
1317 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
1320 static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
1321 struct inode *new_dir, struct dentry *new_dentry,
1324 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1325 struct inode *old_inode = d_inode(old_dentry);
1326 struct inode *new_inode = d_inode(new_dentry);
1327 struct inode *whiteout = NULL;
1328 struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
1329 struct ubifs_inode *whiteout_ui = NULL;
1330 int err, release, sync = 0, move = (new_dir != old_dir);
1331 int is_dir = S_ISDIR(old_inode->i_mode);
1332 int unlink = !!new_inode, new_sz, old_sz;
1333 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1335 struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
1336 .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
1337 struct timespec time;
1338 unsigned int uninitialized_var(saved_nlink);
1339 struct fscrypt_name old_nm, new_nm;
1342 * Budget request settings: deletion direntry, new direntry, removing
1343 * the old inode, and changing old and new parent directory inodes.
1345 * However, this operation also marks the target inode as dirty and
1346 * does not write it, so we allocate budget for the target inode
1350 dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
1351 old_dentry, old_inode->i_ino, old_dir->i_ino,
1352 new_dentry, new_dir->i_ino, flags);
1355 ubifs_assert(inode_is_locked(new_inode));
1357 if (old_dir != new_dir) {
1358 if (ubifs_crypt_is_encrypted(new_dir) &&
1359 !fscrypt_has_permitted_context(new_dir, old_inode))
1363 if (unlink && is_dir) {
1364 err = ubifs_check_dir_empty(new_inode);
1369 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
1373 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
1375 fscrypt_free_filename(&old_nm);
1379 new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
1380 old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
1382 err = ubifs_budget_space(c, &req);
1384 fscrypt_free_filename(&old_nm);
1385 fscrypt_free_filename(&new_nm);
1388 err = ubifs_budget_space(c, &ino_req);
1390 fscrypt_free_filename(&old_nm);
1391 fscrypt_free_filename(&new_nm);
1392 ubifs_release_budget(c, &req);
1396 if (flags & RENAME_WHITEOUT) {
1397 union ubifs_dev_desc *dev = NULL;
1399 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1405 err = do_tmpfile(old_dir, old_dentry, S_IFCHR | WHITEOUT_MODE, &whiteout);
1411 spin_lock(&whiteout->i_lock);
1412 whiteout->i_state |= I_LINKABLE;
1413 spin_unlock(&whiteout->i_lock);
1415 whiteout_ui = ubifs_inode(whiteout);
1416 whiteout_ui->data = dev;
1417 whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
1418 ubifs_assert(!whiteout_ui->dirty);
1421 lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1424 * Like most other Unix systems, set the @i_ctime for inodes on a
1427 time = current_time(old_dir);
1428 old_inode->i_ctime = time;
1430 /* We must adjust parent link count when renaming directories */
1434 * @old_dir loses a link because we are moving
1435 * @old_inode to a different directory.
1437 drop_nlink(old_dir);
1439 * @new_dir only gains a link if we are not also
1440 * overwriting an existing directory.
1446 * @old_inode is not moving to a different directory,
1447 * but @old_dir still loses a link if we are
1448 * overwriting an existing directory.
1451 drop_nlink(old_dir);
1455 old_dir->i_size -= old_sz;
1456 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1457 old_dir->i_mtime = old_dir->i_ctime = time;
1458 new_dir->i_mtime = new_dir->i_ctime = time;
1461 * And finally, if we unlinked a direntry which happened to have the
1462 * same name as the moved direntry, we have to decrement @i_nlink of
1463 * the unlinked inode and change its ctime.
1467 * Directories cannot have hard-links, so if this is a
1468 * directory, just clear @i_nlink.
1470 saved_nlink = new_inode->i_nlink;
1472 clear_nlink(new_inode);
1474 drop_nlink(new_inode);
1475 new_inode->i_ctime = time;
1477 new_dir->i_size += new_sz;
1478 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1482 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
1483 * is dirty, because this will be done later on at the end of
1486 if (IS_SYNC(old_inode)) {
1487 sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1488 if (unlink && IS_SYNC(new_inode))
1493 struct ubifs_budget_req wht_req = { .dirtied_ino = 1,
1495 ALIGN(ubifs_inode(whiteout)->data_len, 8) };
1497 err = ubifs_budget_space(c, &wht_req);
1499 kfree(whiteout_ui->data);
1500 whiteout_ui->data_len = 0;
1505 inc_nlink(whiteout);
1506 mark_inode_dirty(whiteout);
1508 spin_lock(&whiteout->i_lock);
1509 whiteout->i_state &= ~I_LINKABLE;
1510 spin_unlock(&whiteout->i_lock);
1515 err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
1516 new_inode, &new_nm, whiteout, sync);
1520 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1521 ubifs_release_budget(c, &req);
1523 mutex_lock(&old_inode_ui->ui_mutex);
1524 release = old_inode_ui->dirty;
1525 mark_inode_dirty_sync(old_inode);
1526 mutex_unlock(&old_inode_ui->ui_mutex);
1529 ubifs_release_budget(c, &ino_req);
1530 if (IS_SYNC(old_inode))
1531 err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
1533 fscrypt_free_filename(&old_nm);
1534 fscrypt_free_filename(&new_nm);
1539 set_nlink(new_inode, saved_nlink);
1541 new_dir->i_size -= new_sz;
1542 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1544 old_dir->i_size += old_sz;
1545 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1550 drop_nlink(new_dir);
1557 drop_nlink(whiteout);
1560 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1562 ubifs_release_budget(c, &ino_req);
1563 ubifs_release_budget(c, &req);
1564 fscrypt_free_filename(&old_nm);
1565 fscrypt_free_filename(&new_nm);
1569 static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
1570 struct inode *new_dir, struct dentry *new_dentry)
1572 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1573 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1575 int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1576 struct inode *fst_inode = d_inode(old_dentry);
1577 struct inode *snd_inode = d_inode(new_dentry);
1578 struct timespec time;
1580 struct fscrypt_name fst_nm, snd_nm;
1582 ubifs_assert(fst_inode && snd_inode);
1584 if ((ubifs_crypt_is_encrypted(old_dir) ||
1585 ubifs_crypt_is_encrypted(new_dir)) &&
1586 (old_dir != new_dir) &&
1587 (!fscrypt_has_permitted_context(new_dir, fst_inode) ||
1588 !fscrypt_has_permitted_context(old_dir, snd_inode)))
1591 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
1595 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
1597 fscrypt_free_filename(&fst_nm);
1601 lock_4_inodes(old_dir, new_dir, NULL, NULL);
1603 time = current_time(old_dir);
1604 fst_inode->i_ctime = time;
1605 snd_inode->i_ctime = time;
1606 old_dir->i_mtime = old_dir->i_ctime = time;
1607 new_dir->i_mtime = new_dir->i_ctime = time;
1609 if (old_dir != new_dir) {
1610 if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
1612 drop_nlink(old_dir);
1614 else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
1615 drop_nlink(new_dir);
1620 err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
1621 snd_inode, &snd_nm, sync);
1623 unlock_4_inodes(old_dir, new_dir, NULL, NULL);
1624 ubifs_release_budget(c, &req);
1626 fscrypt_free_filename(&fst_nm);
1627 fscrypt_free_filename(&snd_nm);
1631 static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
1632 struct inode *new_dir, struct dentry *new_dentry,
1635 if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
1638 ubifs_assert(inode_is_locked(old_dir));
1639 ubifs_assert(inode_is_locked(new_dir));
1641 if (flags & RENAME_EXCHANGE)
1642 return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
1644 return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1647 int ubifs_getattr(const struct path *path, struct kstat *stat,
1648 u32 request_mask, unsigned int flags)
1651 struct inode *inode = d_inode(path->dentry);
1652 struct ubifs_inode *ui = ubifs_inode(inode);
1654 mutex_lock(&ui->ui_mutex);
1656 if (ui->flags & UBIFS_APPEND_FL)
1657 stat->attributes |= STATX_ATTR_APPEND;
1658 if (ui->flags & UBIFS_COMPR_FL)
1659 stat->attributes |= STATX_ATTR_COMPRESSED;
1660 if (ui->flags & UBIFS_CRYPT_FL)
1661 stat->attributes |= STATX_ATTR_ENCRYPTED;
1662 if (ui->flags & UBIFS_IMMUTABLE_FL)
1663 stat->attributes |= STATX_ATTR_IMMUTABLE;
1665 stat->attributes_mask |= (STATX_ATTR_APPEND |
1666 STATX_ATTR_COMPRESSED |
1667 STATX_ATTR_ENCRYPTED |
1668 STATX_ATTR_IMMUTABLE);
1670 generic_fillattr(inode, stat);
1671 stat->blksize = UBIFS_BLOCK_SIZE;
1672 stat->size = ui->ui_size;
1675 * Unfortunately, the 'stat()' system call was designed for block
1676 * device based file systems, and it is not appropriate for UBIFS,
1677 * because UBIFS does not have notion of "block". For example, it is
1678 * difficult to tell how many block a directory takes - it actually
1679 * takes less than 300 bytes, but we have to round it to block size,
1680 * which introduces large mistake. This makes utilities like 'du' to
1681 * report completely senseless numbers. This is the reason why UBIFS
1682 * goes the same way as JFFS2 - it reports zero blocks for everything
1683 * but regular files, which makes more sense than reporting completely
1686 if (S_ISREG(inode->i_mode)) {
1687 size = ui->xattr_size;
1689 size = ALIGN(size, UBIFS_BLOCK_SIZE);
1691 * Note, user-space expects 512-byte blocks count irrespectively
1692 * of what was reported in @stat->size.
1694 stat->blocks = size >> 9;
1697 mutex_unlock(&ui->ui_mutex);
1701 static int ubifs_dir_open(struct inode *dir, struct file *file)
1703 if (ubifs_crypt_is_encrypted(dir))
1704 return fscrypt_get_encryption_info(dir) ? -EACCES : 0;
1709 const struct inode_operations ubifs_dir_inode_operations = {
1710 .lookup = ubifs_lookup,
1711 .create = ubifs_create,
1713 .symlink = ubifs_symlink,
1714 .unlink = ubifs_unlink,
1715 .mkdir = ubifs_mkdir,
1716 .rmdir = ubifs_rmdir,
1717 .mknod = ubifs_mknod,
1718 .rename = ubifs_rename,
1719 .setattr = ubifs_setattr,
1720 .getattr = ubifs_getattr,
1721 .listxattr = ubifs_listxattr,
1722 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
1723 .update_time = ubifs_update_time,
1725 .tmpfile = ubifs_tmpfile,
1728 const struct file_operations ubifs_dir_operations = {
1729 .llseek = generic_file_llseek,
1730 .release = ubifs_dir_release,
1731 .read = generic_read_dir,
1732 .iterate_shared = ubifs_readdir,
1733 .fsync = ubifs_fsync,
1734 .unlocked_ioctl = ubifs_ioctl,
1735 .open = ubifs_dir_open,
1736 #ifdef CONFIG_COMPAT
1737 .compat_ioctl = ubifs_compat_ioctl,