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,
395 struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
396 struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir);
397 int err, instantiated = 0;
398 struct fscrypt_name nm;
401 * Budget request settings: new inode, new direntry, changing the
402 * parent directory inode.
403 * Allocate budget separately for new dirtied inode, the budget will
404 * be released via writeback.
407 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
408 dentry, mode, dir->i_ino);
410 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
414 err = ubifs_budget_space(c, &req);
416 fscrypt_free_filename(&nm);
420 err = ubifs_budget_space(c, &ino_req);
422 ubifs_release_budget(c, &req);
423 fscrypt_free_filename(&nm);
427 inode = ubifs_new_inode(c, dir, mode);
429 err = PTR_ERR(inode);
432 ui = ubifs_inode(inode);
435 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
436 ubifs_assert(inode->i_op == &ubifs_file_inode_operations);
439 err = ubifs_init_security(dir, inode, &dentry->d_name);
443 mutex_lock(&ui->ui_mutex);
444 insert_inode_hash(inode);
447 mark_inode_dirty(inode);
451 d_tmpfile(dentry, inode);
453 ubifs_assert(ui->dirty);
456 mutex_unlock(&ui->ui_mutex);
458 mutex_lock(&dir_ui->ui_mutex);
459 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
462 mutex_unlock(&dir_ui->ui_mutex);
464 ubifs_release_budget(c, &req);
469 mutex_unlock(&dir_ui->ui_mutex);
471 make_bad_inode(inode);
477 ubifs_release_budget(c, &req);
479 ubifs_release_budget(c, &ino_req);
480 fscrypt_free_filename(&nm);
481 ubifs_err(c, "cannot create temporary file, error %d", err);
485 static int ubifs_tmpfile(struct inode *dir, struct dentry *dentry,
488 return do_tmpfile(dir, dentry, mode, NULL);
492 * vfs_dent_type - get VFS directory entry type.
493 * @type: UBIFS directory entry type
495 * This function converts UBIFS directory entry type into VFS directory entry
498 static unsigned int vfs_dent_type(uint8_t type)
501 case UBIFS_ITYPE_REG:
503 case UBIFS_ITYPE_DIR:
505 case UBIFS_ITYPE_LNK:
507 case UBIFS_ITYPE_BLK:
509 case UBIFS_ITYPE_CHR:
511 case UBIFS_ITYPE_FIFO:
513 case UBIFS_ITYPE_SOCK:
522 * The classical Unix view for directory is that it is a linear array of
523 * (name, inode number) entries. Linux/VFS assumes this model as well.
524 * Particularly, 'readdir()' call wants us to return a directory entry offset
525 * which later may be used to continue 'readdir()'ing the directory or to
526 * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
527 * model because directory entries are identified by keys, which may collide.
529 * UBIFS uses directory entry hash value for directory offsets, so
530 * 'seekdir()'/'telldir()' may not always work because of possible key
531 * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
532 * properly by means of saving full directory entry name in the private field
533 * of the file description object.
535 * This means that UBIFS cannot support NFS which requires full
536 * 'seekdir()'/'telldir()' support.
538 static int ubifs_readdir(struct file *file, struct dir_context *ctx)
540 int fstr_real_len = 0, err = 0;
541 struct fscrypt_name nm;
542 struct fscrypt_str fstr = {0};
544 struct ubifs_dent_node *dent;
545 struct inode *dir = file_inode(file);
546 struct ubifs_info *c = dir->i_sb->s_fs_info;
547 bool encrypted = ubifs_crypt_is_encrypted(dir);
549 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
551 if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
553 * The directory was seek'ed to a senseless position or there
554 * are no more entries.
559 err = fscrypt_get_encryption_info(dir);
560 if (err && err != -ENOKEY)
563 err = fscrypt_fname_alloc_buffer(dir, UBIFS_MAX_NLEN, &fstr);
567 fstr_real_len = fstr.len;
570 if (file->f_version == 0) {
572 * The file was seek'ed, which means that @file->private_data
573 * is now invalid. This may also be just the first
574 * 'ubifs_readdir()' invocation, in which case
575 * @file->private_data is NULL, and the below code is
578 kfree(file->private_data);
579 file->private_data = NULL;
583 * 'generic_file_llseek()' unconditionally sets @file->f_version to
584 * zero, and we use this for detecting whether the file was seek'ed.
588 /* File positions 0 and 1 correspond to "." and ".." */
590 ubifs_assert(!file->private_data);
591 if (!dir_emit_dots(file, ctx)) {
593 fscrypt_fname_free_buffer(&fstr);
597 /* Find the first entry in TNC and save it */
598 lowest_dent_key(c, &key, dir->i_ino);
600 dent = ubifs_tnc_next_ent(c, &key, &nm);
606 ctx->pos = key_hash_flash(c, &dent->key);
607 file->private_data = dent;
610 dent = file->private_data;
613 * The directory was seek'ed to and is now readdir'ed.
614 * Find the entry corresponding to @ctx->pos or the closest one.
616 dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
618 dent = ubifs_tnc_next_ent(c, &key, &nm);
623 ctx->pos = key_hash_flash(c, &dent->key);
624 file->private_data = dent;
628 dbg_gen("ino %llu, new f_pos %#x",
629 (unsigned long long)le64_to_cpu(dent->inum),
630 key_hash_flash(c, &dent->key));
631 ubifs_assert(le64_to_cpu(dent->ch.sqnum) >
632 ubifs_inode(dir)->creat_sqnum);
634 fname_len(&nm) = le16_to_cpu(dent->nlen);
635 fname_name(&nm) = dent->name;
638 fstr.len = fstr_real_len;
640 err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c,
642 le32_to_cpu(dent->cookie),
643 &nm.disk_name, &fstr);
647 fstr.len = fname_len(&nm);
648 fstr.name = fname_name(&nm);
651 if (!dir_emit(ctx, fstr.name, fstr.len,
652 le64_to_cpu(dent->inum),
653 vfs_dent_type(dent->type))) {
655 fscrypt_fname_free_buffer(&fstr);
659 /* Switch to the next entry */
660 key_read(c, &dent->key, &key);
661 dent = ubifs_tnc_next_ent(c, &key, &nm);
667 kfree(file->private_data);
668 ctx->pos = key_hash_flash(c, &dent->key);
669 file->private_data = dent;
674 kfree(file->private_data);
675 file->private_data = NULL;
678 fscrypt_fname_free_buffer(&fstr);
681 ubifs_err(c, "cannot find next direntry, error %d", err);
684 * -ENOENT is a non-fatal error in this context, the TNC uses
685 * it to indicate that the cursor moved past the current directory
686 * and readdir() has to stop.
691 /* 2 is a special value indicating that there are no more direntries */
696 /* Free saved readdir() state when the directory is closed */
697 static int ubifs_dir_release(struct inode *dir, struct file *file)
699 kfree(file->private_data);
700 file->private_data = NULL;
705 * lock_2_inodes - a wrapper for locking two UBIFS inodes.
706 * @inode1: first inode
707 * @inode2: second inode
709 * We do not implement any tricks to guarantee strict lock ordering, because
710 * VFS has already done it for us on the @i_mutex. So this is just a simple
713 static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
715 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
716 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
720 * unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
721 * @inode1: first inode
722 * @inode2: second inode
724 static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
726 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
727 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
730 static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
731 struct dentry *dentry)
733 struct ubifs_info *c = dir->i_sb->s_fs_info;
734 struct inode *inode = d_inode(old_dentry);
735 struct ubifs_inode *ui = ubifs_inode(inode);
736 struct ubifs_inode *dir_ui = ubifs_inode(dir);
737 int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
738 struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
739 .dirtied_ino_d = ALIGN(ui->data_len, 8) };
740 struct fscrypt_name nm;
743 * Budget request settings: new direntry, changing the target inode,
744 * changing the parent inode.
747 dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
748 dentry, inode->i_ino,
749 inode->i_nlink, dir->i_ino);
750 ubifs_assert(inode_is_locked(dir));
751 ubifs_assert(inode_is_locked(inode));
753 if (ubifs_crypt_is_encrypted(dir) &&
754 !fscrypt_has_permitted_context(dir, inode))
757 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
761 err = dbg_check_synced_i_size(c, inode);
765 err = ubifs_budget_space(c, &req);
769 lock_2_inodes(dir, inode);
771 /* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
772 if (inode->i_nlink == 0)
773 ubifs_delete_orphan(c, inode->i_ino);
777 inode->i_ctime = current_time(inode);
778 dir->i_size += sz_change;
779 dir_ui->ui_size = dir->i_size;
780 dir->i_mtime = dir->i_ctime = inode->i_ctime;
781 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
784 unlock_2_inodes(dir, inode);
786 ubifs_release_budget(c, &req);
787 d_instantiate(dentry, inode);
788 fscrypt_free_filename(&nm);
792 dir->i_size -= sz_change;
793 dir_ui->ui_size = dir->i_size;
795 if (inode->i_nlink == 0)
796 ubifs_add_orphan(c, inode->i_ino);
797 unlock_2_inodes(dir, inode);
798 ubifs_release_budget(c, &req);
801 fscrypt_free_filename(&nm);
805 static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
807 struct ubifs_info *c = dir->i_sb->s_fs_info;
808 struct inode *inode = d_inode(dentry);
809 struct ubifs_inode *dir_ui = ubifs_inode(dir);
810 int err, sz_change, budgeted = 1;
811 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
812 unsigned int saved_nlink = inode->i_nlink;
813 struct fscrypt_name nm;
816 * Budget request settings: deletion direntry, deletion inode (+1 for
817 * @dirtied_ino), changing the parent directory inode. If budgeting
818 * fails, go ahead anyway because we have extra space reserved for
822 dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
823 dentry, inode->i_ino,
824 inode->i_nlink, dir->i_ino);
826 if (ubifs_crypt_is_encrypted(dir)) {
827 err = fscrypt_get_encryption_info(dir);
828 if (err && err != -ENOKEY)
832 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
836 sz_change = CALC_DENT_SIZE(fname_len(&nm));
838 ubifs_assert(inode_is_locked(dir));
839 ubifs_assert(inode_is_locked(inode));
840 err = dbg_check_synced_i_size(c, inode);
844 err = ubifs_budget_space(c, &req);
851 lock_2_inodes(dir, inode);
852 inode->i_ctime = current_time(dir);
854 dir->i_size -= sz_change;
855 dir_ui->ui_size = dir->i_size;
856 dir->i_mtime = dir->i_ctime = inode->i_ctime;
857 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
860 unlock_2_inodes(dir, inode);
863 ubifs_release_budget(c, &req);
865 /* We've deleted something - clean the "no space" flags */
866 c->bi.nospace = c->bi.nospace_rp = 0;
869 fscrypt_free_filename(&nm);
873 dir->i_size += sz_change;
874 dir_ui->ui_size = dir->i_size;
875 set_nlink(inode, saved_nlink);
876 unlock_2_inodes(dir, inode);
878 ubifs_release_budget(c, &req);
880 fscrypt_free_filename(&nm);
885 * check_dir_empty - check if a directory is empty or not.
886 * @dir: VFS inode object of the directory to check
888 * This function checks if directory @dir is empty. Returns zero if the
889 * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
890 * in case of of errors.
892 int ubifs_check_dir_empty(struct inode *dir)
894 struct ubifs_info *c = dir->i_sb->s_fs_info;
895 struct fscrypt_name nm = { 0 };
896 struct ubifs_dent_node *dent;
900 lowest_dent_key(c, &key, dir->i_ino);
901 dent = ubifs_tnc_next_ent(c, &key, &nm);
913 static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
915 struct ubifs_info *c = dir->i_sb->s_fs_info;
916 struct inode *inode = d_inode(dentry);
917 int err, sz_change, budgeted = 1;
918 struct ubifs_inode *dir_ui = ubifs_inode(dir);
919 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
920 struct fscrypt_name nm;
923 * Budget request settings: deletion direntry, deletion inode and
924 * changing the parent inode. If budgeting fails, go ahead anyway
925 * because we have extra space reserved for deletions.
928 dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
929 inode->i_ino, dir->i_ino);
930 ubifs_assert(inode_is_locked(dir));
931 ubifs_assert(inode_is_locked(inode));
932 err = ubifs_check_dir_empty(d_inode(dentry));
936 if (ubifs_crypt_is_encrypted(dir)) {
937 err = fscrypt_get_encryption_info(dir);
938 if (err && err != -ENOKEY)
942 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
946 sz_change = CALC_DENT_SIZE(fname_len(&nm));
948 err = ubifs_budget_space(c, &req);
955 lock_2_inodes(dir, inode);
956 inode->i_ctime = current_time(dir);
959 dir->i_size -= sz_change;
960 dir_ui->ui_size = dir->i_size;
961 dir->i_mtime = dir->i_ctime = inode->i_ctime;
962 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
965 unlock_2_inodes(dir, inode);
968 ubifs_release_budget(c, &req);
970 /* We've deleted something - clean the "no space" flags */
971 c->bi.nospace = c->bi.nospace_rp = 0;
974 fscrypt_free_filename(&nm);
978 dir->i_size += sz_change;
979 dir_ui->ui_size = dir->i_size;
982 unlock_2_inodes(dir, inode);
984 ubifs_release_budget(c, &req);
986 fscrypt_free_filename(&nm);
990 static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
993 struct ubifs_inode *dir_ui = ubifs_inode(dir);
994 struct ubifs_info *c = dir->i_sb->s_fs_info;
996 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
998 struct fscrypt_name nm;
1001 * Budget request settings: new inode, new direntry and changing parent
1005 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
1006 dentry, mode, dir->i_ino);
1008 err = ubifs_budget_space(c, &req);
1012 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1016 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1018 inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
1019 if (IS_ERR(inode)) {
1020 err = PTR_ERR(inode);
1024 err = ubifs_init_security(dir, inode, &dentry->d_name);
1028 mutex_lock(&dir_ui->ui_mutex);
1029 insert_inode_hash(inode);
1032 dir->i_size += sz_change;
1033 dir_ui->ui_size = dir->i_size;
1034 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1035 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1037 ubifs_err(c, "cannot create directory, error %d", err);
1040 mutex_unlock(&dir_ui->ui_mutex);
1042 ubifs_release_budget(c, &req);
1043 d_instantiate(dentry, inode);
1044 fscrypt_free_filename(&nm);
1048 dir->i_size -= sz_change;
1049 dir_ui->ui_size = dir->i_size;
1051 mutex_unlock(&dir_ui->ui_mutex);
1053 make_bad_inode(inode);
1056 fscrypt_free_filename(&nm);
1058 ubifs_release_budget(c, &req);
1062 static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
1063 umode_t mode, dev_t rdev)
1065 struct inode *inode;
1066 struct ubifs_inode *ui;
1067 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1068 struct ubifs_info *c = dir->i_sb->s_fs_info;
1069 union ubifs_dev_desc *dev = NULL;
1071 int err, devlen = 0;
1072 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1074 struct fscrypt_name nm;
1077 * Budget request settings: new inode, new direntry and changing parent
1081 dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
1083 if (S_ISBLK(mode) || S_ISCHR(mode)) {
1084 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1087 devlen = ubifs_encode_dev(dev, rdev);
1090 req.new_ino_d = ALIGN(devlen, 8);
1091 err = ubifs_budget_space(c, &req);
1097 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1103 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1105 inode = ubifs_new_inode(c, dir, mode);
1106 if (IS_ERR(inode)) {
1108 err = PTR_ERR(inode);
1112 init_special_inode(inode, inode->i_mode, rdev);
1113 inode->i_size = ubifs_inode(inode)->ui_size = devlen;
1114 ui = ubifs_inode(inode);
1116 ui->data_len = devlen;
1118 err = ubifs_init_security(dir, inode, &dentry->d_name);
1122 mutex_lock(&dir_ui->ui_mutex);
1123 dir->i_size += sz_change;
1124 dir_ui->ui_size = dir->i_size;
1125 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1126 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1129 mutex_unlock(&dir_ui->ui_mutex);
1131 ubifs_release_budget(c, &req);
1132 insert_inode_hash(inode);
1133 d_instantiate(dentry, inode);
1134 fscrypt_free_filename(&nm);
1138 dir->i_size -= sz_change;
1139 dir_ui->ui_size = dir->i_size;
1140 mutex_unlock(&dir_ui->ui_mutex);
1142 make_bad_inode(inode);
1145 fscrypt_free_filename(&nm);
1147 ubifs_release_budget(c, &req);
1151 static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
1152 const char *symname)
1154 struct inode *inode;
1155 struct ubifs_inode *ui;
1156 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1157 struct ubifs_info *c = dir->i_sb->s_fs_info;
1158 int err, sz_change, len = strlen(symname);
1159 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
1160 struct fscrypt_symlink_data *sd = NULL;
1161 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1162 .new_ino_d = ALIGN(len, 8),
1164 struct fscrypt_name nm;
1166 if (ubifs_crypt_is_encrypted(dir)) {
1167 err = fscrypt_get_encryption_info(dir);
1171 if (!fscrypt_has_encryption_key(dir)) {
1176 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
1177 sizeof(struct fscrypt_symlink_data));
1181 * Budget request settings: new inode, new direntry and changing parent
1185 dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
1186 symname, dir->i_ino);
1188 if (disk_link.len > UBIFS_MAX_INO_DATA)
1189 return -ENAMETOOLONG;
1191 err = ubifs_budget_space(c, &req);
1195 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1199 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1201 inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
1202 if (IS_ERR(inode)) {
1203 err = PTR_ERR(inode);
1207 ui = ubifs_inode(inode);
1208 ui->data = kmalloc(disk_link.len, GFP_NOFS);
1214 if (ubifs_crypt_is_encrypted(dir)) {
1215 struct qstr istr = QSTR_INIT(symname, len);
1216 struct fscrypt_str ostr;
1218 sd = kzalloc(disk_link.len, GFP_NOFS);
1224 ostr.name = sd->encrypted_path;
1225 ostr.len = disk_link.len;
1227 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
1231 sd->len = cpu_to_le16(ostr.len);
1232 disk_link.name = (char *)sd;
1234 inode->i_link = ui->data;
1237 memcpy(ui->data, disk_link.name, disk_link.len);
1238 ((char *)ui->data)[disk_link.len - 1] = '\0';
1241 * The terminating zero byte is not written to the flash media and it
1242 * is put just to make later in-memory string processing simpler. Thus,
1243 * data length is @len, not @len + %1.
1245 ui->data_len = disk_link.len - 1;
1246 inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
1248 err = ubifs_init_security(dir, inode, &dentry->d_name);
1252 mutex_lock(&dir_ui->ui_mutex);
1253 dir->i_size += sz_change;
1254 dir_ui->ui_size = dir->i_size;
1255 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1256 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1259 mutex_unlock(&dir_ui->ui_mutex);
1261 insert_inode_hash(inode);
1262 d_instantiate(dentry, inode);
1267 dir->i_size -= sz_change;
1268 dir_ui->ui_size = dir->i_size;
1269 mutex_unlock(&dir_ui->ui_mutex);
1271 make_bad_inode(inode);
1274 fscrypt_free_filename(&nm);
1276 ubifs_release_budget(c, &req);
1282 * lock_4_inodes - a wrapper for locking three UBIFS inodes.
1283 * @inode1: first inode
1284 * @inode2: second inode
1285 * @inode3: third inode
1286 * @inode4: fouth inode
1288 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
1289 * @inode2 whereas @inode3 and @inode4 may be %NULL.
1291 * We do not implement any tricks to guarantee strict lock ordering, because
1292 * VFS has already done it for us on the @i_mutex. So this is just a simple
1295 static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
1296 struct inode *inode3, struct inode *inode4)
1298 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
1299 if (inode2 != inode1)
1300 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
1302 mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
1304 mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
1308 * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
1309 * @inode1: first inode
1310 * @inode2: second inode
1311 * @inode3: third inode
1312 * @inode4: fouth inode
1314 static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
1315 struct inode *inode3, struct inode *inode4)
1318 mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
1320 mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
1321 if (inode1 != inode2)
1322 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
1323 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
1326 static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
1327 struct inode *new_dir, struct dentry *new_dentry,
1330 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1331 struct inode *old_inode = d_inode(old_dentry);
1332 struct inode *new_inode = d_inode(new_dentry);
1333 struct inode *whiteout = NULL;
1334 struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
1335 struct ubifs_inode *whiteout_ui = NULL;
1336 int err, release, sync = 0, move = (new_dir != old_dir);
1337 int is_dir = S_ISDIR(old_inode->i_mode);
1338 int unlink = !!new_inode, new_sz, old_sz;
1339 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1341 struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
1342 .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
1343 struct timespec time;
1344 unsigned int uninitialized_var(saved_nlink);
1345 struct fscrypt_name old_nm, new_nm;
1348 * Budget request settings: deletion direntry, new direntry, removing
1349 * the old inode, and changing old and new parent directory inodes.
1351 * However, this operation also marks the target inode as dirty and
1352 * does not write it, so we allocate budget for the target inode
1356 dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
1357 old_dentry, old_inode->i_ino, old_dir->i_ino,
1358 new_dentry, new_dir->i_ino, flags);
1361 ubifs_assert(inode_is_locked(new_inode));
1363 if (old_dir != new_dir) {
1364 if (ubifs_crypt_is_encrypted(new_dir) &&
1365 !fscrypt_has_permitted_context(new_dir, old_inode))
1369 if (unlink && is_dir) {
1370 err = ubifs_check_dir_empty(new_inode);
1375 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
1379 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
1381 fscrypt_free_filename(&old_nm);
1385 new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
1386 old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
1388 err = ubifs_budget_space(c, &req);
1390 fscrypt_free_filename(&old_nm);
1391 fscrypt_free_filename(&new_nm);
1394 err = ubifs_budget_space(c, &ino_req);
1396 fscrypt_free_filename(&old_nm);
1397 fscrypt_free_filename(&new_nm);
1398 ubifs_release_budget(c, &req);
1402 if (flags & RENAME_WHITEOUT) {
1403 union ubifs_dev_desc *dev = NULL;
1405 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1411 err = do_tmpfile(old_dir, old_dentry, S_IFCHR | WHITEOUT_MODE, &whiteout);
1417 spin_lock(&whiteout->i_lock);
1418 whiteout->i_state |= I_LINKABLE;
1419 spin_unlock(&whiteout->i_lock);
1421 whiteout_ui = ubifs_inode(whiteout);
1422 whiteout_ui->data = dev;
1423 whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
1424 ubifs_assert(!whiteout_ui->dirty);
1427 lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1430 * Like most other Unix systems, set the @i_ctime for inodes on a
1433 time = current_time(old_dir);
1434 old_inode->i_ctime = time;
1436 /* We must adjust parent link count when renaming directories */
1440 * @old_dir loses a link because we are moving
1441 * @old_inode to a different directory.
1443 drop_nlink(old_dir);
1445 * @new_dir only gains a link if we are not also
1446 * overwriting an existing directory.
1452 * @old_inode is not moving to a different directory,
1453 * but @old_dir still loses a link if we are
1454 * overwriting an existing directory.
1457 drop_nlink(old_dir);
1460 /* Add the old_dentry size to the old_dir size. */
1461 old_sz -= CALC_DENT_SIZE(fname_len(&old_nm));
1464 old_dir->i_size -= old_sz;
1465 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1466 old_dir->i_mtime = old_dir->i_ctime = time;
1467 new_dir->i_mtime = new_dir->i_ctime = time;
1470 * And finally, if we unlinked a direntry which happened to have the
1471 * same name as the moved direntry, we have to decrement @i_nlink of
1472 * the unlinked inode and change its ctime.
1476 * Directories cannot have hard-links, so if this is a
1477 * directory, just clear @i_nlink.
1479 saved_nlink = new_inode->i_nlink;
1481 clear_nlink(new_inode);
1483 drop_nlink(new_inode);
1484 new_inode->i_ctime = time;
1486 new_dir->i_size += new_sz;
1487 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1491 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
1492 * is dirty, because this will be done later on at the end of
1495 if (IS_SYNC(old_inode)) {
1496 sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1497 if (unlink && IS_SYNC(new_inode))
1502 struct ubifs_budget_req wht_req = { .dirtied_ino = 1,
1504 ALIGN(ubifs_inode(whiteout)->data_len, 8) };
1506 err = ubifs_budget_space(c, &wht_req);
1512 inc_nlink(whiteout);
1513 mark_inode_dirty(whiteout);
1515 spin_lock(&whiteout->i_lock);
1516 whiteout->i_state &= ~I_LINKABLE;
1517 spin_unlock(&whiteout->i_lock);
1522 err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
1523 new_inode, &new_nm, whiteout, sync);
1527 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1528 ubifs_release_budget(c, &req);
1530 mutex_lock(&old_inode_ui->ui_mutex);
1531 release = old_inode_ui->dirty;
1532 mark_inode_dirty_sync(old_inode);
1533 mutex_unlock(&old_inode_ui->ui_mutex);
1536 ubifs_release_budget(c, &ino_req);
1537 if (IS_SYNC(old_inode))
1538 err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
1540 fscrypt_free_filename(&old_nm);
1541 fscrypt_free_filename(&new_nm);
1546 set_nlink(new_inode, saved_nlink);
1548 new_dir->i_size -= new_sz;
1549 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1551 old_dir->i_size += old_sz;
1552 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1557 drop_nlink(new_dir);
1564 drop_nlink(whiteout);
1567 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1569 ubifs_release_budget(c, &ino_req);
1570 ubifs_release_budget(c, &req);
1571 fscrypt_free_filename(&old_nm);
1572 fscrypt_free_filename(&new_nm);
1576 static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
1577 struct inode *new_dir, struct dentry *new_dentry)
1579 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1580 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1582 int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1583 struct inode *fst_inode = d_inode(old_dentry);
1584 struct inode *snd_inode = d_inode(new_dentry);
1585 struct timespec time;
1587 struct fscrypt_name fst_nm, snd_nm;
1589 ubifs_assert(fst_inode && snd_inode);
1591 if ((ubifs_crypt_is_encrypted(old_dir) ||
1592 ubifs_crypt_is_encrypted(new_dir)) &&
1593 (old_dir != new_dir) &&
1594 (!fscrypt_has_permitted_context(new_dir, fst_inode) ||
1595 !fscrypt_has_permitted_context(old_dir, snd_inode)))
1598 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
1602 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
1604 fscrypt_free_filename(&fst_nm);
1608 lock_4_inodes(old_dir, new_dir, NULL, NULL);
1610 time = current_time(old_dir);
1611 fst_inode->i_ctime = time;
1612 snd_inode->i_ctime = time;
1613 old_dir->i_mtime = old_dir->i_ctime = time;
1614 new_dir->i_mtime = new_dir->i_ctime = time;
1616 if (old_dir != new_dir) {
1617 if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
1619 drop_nlink(old_dir);
1621 else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
1622 drop_nlink(new_dir);
1627 err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
1628 snd_inode, &snd_nm, sync);
1630 unlock_4_inodes(old_dir, new_dir, NULL, NULL);
1631 ubifs_release_budget(c, &req);
1633 fscrypt_free_filename(&fst_nm);
1634 fscrypt_free_filename(&snd_nm);
1638 static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
1639 struct inode *new_dir, struct dentry *new_dentry,
1642 if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
1645 ubifs_assert(inode_is_locked(old_dir));
1646 ubifs_assert(inode_is_locked(new_dir));
1648 if (flags & RENAME_EXCHANGE)
1649 return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
1651 return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1654 int ubifs_getattr(const struct path *path, struct kstat *stat,
1655 u32 request_mask, unsigned int flags)
1658 struct inode *inode = d_inode(path->dentry);
1659 struct ubifs_inode *ui = ubifs_inode(inode);
1661 mutex_lock(&ui->ui_mutex);
1663 if (ui->flags & UBIFS_APPEND_FL)
1664 stat->attributes |= STATX_ATTR_APPEND;
1665 if (ui->flags & UBIFS_COMPR_FL)
1666 stat->attributes |= STATX_ATTR_COMPRESSED;
1667 if (ui->flags & UBIFS_CRYPT_FL)
1668 stat->attributes |= STATX_ATTR_ENCRYPTED;
1669 if (ui->flags & UBIFS_IMMUTABLE_FL)
1670 stat->attributes |= STATX_ATTR_IMMUTABLE;
1672 stat->attributes_mask |= (STATX_ATTR_APPEND |
1673 STATX_ATTR_COMPRESSED |
1674 STATX_ATTR_ENCRYPTED |
1675 STATX_ATTR_IMMUTABLE);
1677 generic_fillattr(inode, stat);
1678 stat->blksize = UBIFS_BLOCK_SIZE;
1679 stat->size = ui->ui_size;
1682 * Unfortunately, the 'stat()' system call was designed for block
1683 * device based file systems, and it is not appropriate for UBIFS,
1684 * because UBIFS does not have notion of "block". For example, it is
1685 * difficult to tell how many block a directory takes - it actually
1686 * takes less than 300 bytes, but we have to round it to block size,
1687 * which introduces large mistake. This makes utilities like 'du' to
1688 * report completely senseless numbers. This is the reason why UBIFS
1689 * goes the same way as JFFS2 - it reports zero blocks for everything
1690 * but regular files, which makes more sense than reporting completely
1693 if (S_ISREG(inode->i_mode)) {
1694 size = ui->xattr_size;
1696 size = ALIGN(size, UBIFS_BLOCK_SIZE);
1698 * Note, user-space expects 512-byte blocks count irrespectively
1699 * of what was reported in @stat->size.
1701 stat->blocks = size >> 9;
1704 mutex_unlock(&ui->ui_mutex);
1708 static int ubifs_dir_open(struct inode *dir, struct file *file)
1710 if (ubifs_crypt_is_encrypted(dir))
1711 return fscrypt_get_encryption_info(dir) ? -EACCES : 0;
1716 const struct inode_operations ubifs_dir_inode_operations = {
1717 .lookup = ubifs_lookup,
1718 .create = ubifs_create,
1720 .symlink = ubifs_symlink,
1721 .unlink = ubifs_unlink,
1722 .mkdir = ubifs_mkdir,
1723 .rmdir = ubifs_rmdir,
1724 .mknod = ubifs_mknod,
1725 .rename = ubifs_rename,
1726 .setattr = ubifs_setattr,
1727 .getattr = ubifs_getattr,
1728 .listxattr = ubifs_listxattr,
1729 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
1730 .update_time = ubifs_update_time,
1732 .tmpfile = ubifs_tmpfile,
1735 const struct file_operations ubifs_dir_operations = {
1736 .llseek = generic_file_llseek,
1737 .release = ubifs_dir_release,
1738 .read = generic_read_dir,
1739 .iterate_shared = ubifs_readdir,
1740 .fsync = ubifs_fsync,
1741 .unlocked_ioctl = ubifs_ioctl,
1742 .open = ubifs_dir_open,
1743 #ifdef CONFIG_COMPAT
1744 .compat_ioctl = ubifs_compat_ioctl,