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 dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
257 err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
259 dent_key_init(c, &key, dir->i_ino, &nm);
260 err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
264 if (err == -ENOENT) {
265 dbg_gen("not found");
271 if (dbg_check_name(c, dent, &nm)) {
276 inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
279 * This should not happen. Probably the file-system needs
282 err = PTR_ERR(inode);
283 ubifs_err(c, "dead directory entry '%pd', error %d",
285 ubifs_ro_mode(c, err);
289 if (ubifs_crypt_is_encrypted(dir) &&
290 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
291 !fscrypt_has_permitted_context(dir, inode)) {
292 ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
293 dir->i_ino, inode->i_ino);
300 fscrypt_free_filename(&nm);
302 * Note, d_splice_alias() would be required instead if we supported
305 d_add(dentry, inode);
313 fscrypt_free_filename(&nm);
317 static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
321 struct ubifs_info *c = dir->i_sb->s_fs_info;
322 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
324 struct ubifs_inode *dir_ui = ubifs_inode(dir);
325 struct fscrypt_name nm;
329 * Budget request settings: new inode, new direntry, changing the
330 * parent directory inode.
333 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
334 dentry, mode, dir->i_ino);
336 err = ubifs_budget_space(c, &req);
340 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
344 sz_change = CALC_DENT_SIZE(fname_len(&nm));
346 inode = ubifs_new_inode(c, dir, mode);
348 err = PTR_ERR(inode);
352 err = ubifs_init_security(dir, inode, &dentry->d_name);
356 mutex_lock(&dir_ui->ui_mutex);
357 dir->i_size += sz_change;
358 dir_ui->ui_size = dir->i_size;
359 dir->i_mtime = dir->i_ctime = inode->i_ctime;
360 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
363 mutex_unlock(&dir_ui->ui_mutex);
365 ubifs_release_budget(c, &req);
366 fscrypt_free_filename(&nm);
367 insert_inode_hash(inode);
368 d_instantiate(dentry, inode);
372 dir->i_size -= sz_change;
373 dir_ui->ui_size = dir->i_size;
374 mutex_unlock(&dir_ui->ui_mutex);
376 make_bad_inode(inode);
379 fscrypt_free_filename(&nm);
381 ubifs_release_budget(c, &req);
382 ubifs_err(c, "cannot create regular file, error %d", err);
386 static int do_tmpfile(struct inode *dir, struct dentry *dentry,
387 umode_t mode, struct inode **whiteout)
390 struct ubifs_info *c = dir->i_sb->s_fs_info;
391 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1};
392 struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
393 struct ubifs_inode *ui, *dir_ui = ubifs_inode(dir);
394 int err, instantiated = 0;
395 struct fscrypt_name nm;
398 * Budget request settings: new dirty inode, new direntry,
399 * budget for dirtied inode will be released via writeback.
402 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
403 dentry, mode, dir->i_ino);
405 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
409 err = ubifs_budget_space(c, &req);
411 fscrypt_free_filename(&nm);
415 err = ubifs_budget_space(c, &ino_req);
417 ubifs_release_budget(c, &req);
418 fscrypt_free_filename(&nm);
422 inode = ubifs_new_inode(c, dir, mode);
424 err = PTR_ERR(inode);
427 ui = ubifs_inode(inode);
430 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
431 ubifs_assert(inode->i_op == &ubifs_file_inode_operations);
434 err = ubifs_init_security(dir, inode, &dentry->d_name);
438 mutex_lock(&ui->ui_mutex);
439 insert_inode_hash(inode);
442 mark_inode_dirty(inode);
446 d_tmpfile(dentry, inode);
448 ubifs_assert(ui->dirty);
451 mutex_unlock(&ui->ui_mutex);
453 mutex_lock(&dir_ui->ui_mutex);
454 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
457 mutex_unlock(&dir_ui->ui_mutex);
459 ubifs_release_budget(c, &req);
464 mutex_unlock(&dir_ui->ui_mutex);
466 make_bad_inode(inode);
470 ubifs_release_budget(c, &req);
472 ubifs_release_budget(c, &ino_req);
473 fscrypt_free_filename(&nm);
474 ubifs_err(c, "cannot create temporary file, error %d", err);
478 static int ubifs_tmpfile(struct inode *dir, struct dentry *dentry,
481 return do_tmpfile(dir, dentry, mode, NULL);
485 * vfs_dent_type - get VFS directory entry type.
486 * @type: UBIFS directory entry type
488 * This function converts UBIFS directory entry type into VFS directory entry
491 static unsigned int vfs_dent_type(uint8_t type)
494 case UBIFS_ITYPE_REG:
496 case UBIFS_ITYPE_DIR:
498 case UBIFS_ITYPE_LNK:
500 case UBIFS_ITYPE_BLK:
502 case UBIFS_ITYPE_CHR:
504 case UBIFS_ITYPE_FIFO:
506 case UBIFS_ITYPE_SOCK:
515 * The classical Unix view for directory is that it is a linear array of
516 * (name, inode number) entries. Linux/VFS assumes this model as well.
517 * Particularly, 'readdir()' call wants us to return a directory entry offset
518 * which later may be used to continue 'readdir()'ing the directory or to
519 * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
520 * model because directory entries are identified by keys, which may collide.
522 * UBIFS uses directory entry hash value for directory offsets, so
523 * 'seekdir()'/'telldir()' may not always work because of possible key
524 * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
525 * properly by means of saving full directory entry name in the private field
526 * of the file description object.
528 * This means that UBIFS cannot support NFS which requires full
529 * 'seekdir()'/'telldir()' support.
531 static int ubifs_readdir(struct file *file, struct dir_context *ctx)
533 int fstr_real_len = 0, err = 0;
534 struct fscrypt_name nm;
535 struct fscrypt_str fstr = {0};
537 struct ubifs_dent_node *dent;
538 struct inode *dir = file_inode(file);
539 struct ubifs_info *c = dir->i_sb->s_fs_info;
540 bool encrypted = ubifs_crypt_is_encrypted(dir);
542 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
544 if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
546 * The directory was seek'ed to a senseless position or there
547 * are no more entries.
552 err = fscrypt_get_encryption_info(dir);
553 if (err && err != -ENOKEY)
556 err = fscrypt_fname_alloc_buffer(dir, UBIFS_MAX_NLEN, &fstr);
560 fstr_real_len = fstr.len;
563 if (file->f_version == 0) {
565 * The file was seek'ed, which means that @file->private_data
566 * is now invalid. This may also be just the first
567 * 'ubifs_readdir()' invocation, in which case
568 * @file->private_data is NULL, and the below code is
571 kfree(file->private_data);
572 file->private_data = NULL;
576 * 'generic_file_llseek()' unconditionally sets @file->f_version to
577 * zero, and we use this for detecting whether the file was seek'ed.
581 /* File positions 0 and 1 correspond to "." and ".." */
583 ubifs_assert(!file->private_data);
584 if (!dir_emit_dots(file, ctx)) {
586 fscrypt_fname_free_buffer(&fstr);
590 /* Find the first entry in TNC and save it */
591 lowest_dent_key(c, &key, dir->i_ino);
593 dent = ubifs_tnc_next_ent(c, &key, &nm);
599 ctx->pos = key_hash_flash(c, &dent->key);
600 file->private_data = dent;
603 dent = file->private_data;
606 * The directory was seek'ed to and is now readdir'ed.
607 * Find the entry corresponding to @ctx->pos or the closest one.
609 dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
611 dent = ubifs_tnc_next_ent(c, &key, &nm);
616 ctx->pos = key_hash_flash(c, &dent->key);
617 file->private_data = dent;
621 dbg_gen("ino %llu, new f_pos %#x",
622 (unsigned long long)le64_to_cpu(dent->inum),
623 key_hash_flash(c, &dent->key));
624 ubifs_assert(le64_to_cpu(dent->ch.sqnum) >
625 ubifs_inode(dir)->creat_sqnum);
627 fname_len(&nm) = le16_to_cpu(dent->nlen);
628 fname_name(&nm) = dent->name;
631 fstr.len = fstr_real_len;
633 err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c,
635 le32_to_cpu(dent->cookie),
636 &nm.disk_name, &fstr);
640 fstr.len = fname_len(&nm);
641 fstr.name = fname_name(&nm);
644 if (!dir_emit(ctx, fstr.name, fstr.len,
645 le64_to_cpu(dent->inum),
646 vfs_dent_type(dent->type))) {
648 fscrypt_fname_free_buffer(&fstr);
652 /* Switch to the next entry */
653 key_read(c, &dent->key, &key);
654 dent = ubifs_tnc_next_ent(c, &key, &nm);
660 kfree(file->private_data);
661 ctx->pos = key_hash_flash(c, &dent->key);
662 file->private_data = dent;
667 kfree(file->private_data);
668 file->private_data = NULL;
671 fscrypt_fname_free_buffer(&fstr);
674 ubifs_err(c, "cannot find next direntry, error %d", err);
677 * -ENOENT is a non-fatal error in this context, the TNC uses
678 * it to indicate that the cursor moved past the current directory
679 * and readdir() has to stop.
684 /* 2 is a special value indicating that there are no more direntries */
689 /* Free saved readdir() state when the directory is closed */
690 static int ubifs_dir_release(struct inode *dir, struct file *file)
692 kfree(file->private_data);
693 file->private_data = NULL;
698 * lock_2_inodes - a wrapper for locking two UBIFS inodes.
699 * @inode1: first inode
700 * @inode2: second inode
702 * We do not implement any tricks to guarantee strict lock ordering, because
703 * VFS has already done it for us on the @i_mutex. So this is just a simple
706 static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
708 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
709 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
713 * unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
714 * @inode1: first inode
715 * @inode2: second inode
717 static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
719 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
720 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
723 static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
724 struct dentry *dentry)
726 struct ubifs_info *c = dir->i_sb->s_fs_info;
727 struct inode *inode = d_inode(old_dentry);
728 struct ubifs_inode *ui = ubifs_inode(inode);
729 struct ubifs_inode *dir_ui = ubifs_inode(dir);
730 int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
731 struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
732 .dirtied_ino_d = ALIGN(ui->data_len, 8) };
733 struct fscrypt_name nm;
736 * Budget request settings: new direntry, changing the target inode,
737 * changing the parent inode.
740 dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
741 dentry, inode->i_ino,
742 inode->i_nlink, dir->i_ino);
743 ubifs_assert(inode_is_locked(dir));
744 ubifs_assert(inode_is_locked(inode));
746 if (ubifs_crypt_is_encrypted(dir) &&
747 !fscrypt_has_permitted_context(dir, inode))
750 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
754 err = dbg_check_synced_i_size(c, inode);
758 err = ubifs_budget_space(c, &req);
762 lock_2_inodes(dir, inode);
764 /* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
765 if (inode->i_nlink == 0)
766 ubifs_delete_orphan(c, inode->i_ino);
770 inode->i_ctime = current_time(inode);
771 dir->i_size += sz_change;
772 dir_ui->ui_size = dir->i_size;
773 dir->i_mtime = dir->i_ctime = inode->i_ctime;
774 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
777 unlock_2_inodes(dir, inode);
779 ubifs_release_budget(c, &req);
780 d_instantiate(dentry, inode);
781 fscrypt_free_filename(&nm);
785 dir->i_size -= sz_change;
786 dir_ui->ui_size = dir->i_size;
788 if (inode->i_nlink == 0)
789 ubifs_add_orphan(c, inode->i_ino);
790 unlock_2_inodes(dir, inode);
791 ubifs_release_budget(c, &req);
794 fscrypt_free_filename(&nm);
798 static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
800 struct ubifs_info *c = dir->i_sb->s_fs_info;
801 struct inode *inode = d_inode(dentry);
802 struct ubifs_inode *dir_ui = ubifs_inode(dir);
803 int err, sz_change, budgeted = 1;
804 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
805 unsigned int saved_nlink = inode->i_nlink;
806 struct fscrypt_name nm;
809 * Budget request settings: deletion direntry, deletion inode (+1 for
810 * @dirtied_ino), changing the parent directory inode. If budgeting
811 * fails, go ahead anyway because we have extra space reserved for
815 dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
816 dentry, inode->i_ino,
817 inode->i_nlink, dir->i_ino);
819 if (ubifs_crypt_is_encrypted(dir)) {
820 err = fscrypt_get_encryption_info(dir);
821 if (err && err != -ENOKEY)
825 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
829 sz_change = CALC_DENT_SIZE(fname_len(&nm));
831 ubifs_assert(inode_is_locked(dir));
832 ubifs_assert(inode_is_locked(inode));
833 err = dbg_check_synced_i_size(c, inode);
837 err = ubifs_budget_space(c, &req);
844 lock_2_inodes(dir, inode);
845 inode->i_ctime = current_time(dir);
847 dir->i_size -= sz_change;
848 dir_ui->ui_size = dir->i_size;
849 dir->i_mtime = dir->i_ctime = inode->i_ctime;
850 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
853 unlock_2_inodes(dir, inode);
856 ubifs_release_budget(c, &req);
858 /* We've deleted something - clean the "no space" flags */
859 c->bi.nospace = c->bi.nospace_rp = 0;
862 fscrypt_free_filename(&nm);
866 dir->i_size += sz_change;
867 dir_ui->ui_size = dir->i_size;
868 set_nlink(inode, saved_nlink);
869 unlock_2_inodes(dir, inode);
871 ubifs_release_budget(c, &req);
873 fscrypt_free_filename(&nm);
878 * check_dir_empty - check if a directory is empty or not.
879 * @dir: VFS inode object of the directory to check
881 * This function checks if directory @dir is empty. Returns zero if the
882 * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
883 * in case of of errors.
885 int ubifs_check_dir_empty(struct inode *dir)
887 struct ubifs_info *c = dir->i_sb->s_fs_info;
888 struct fscrypt_name nm = { 0 };
889 struct ubifs_dent_node *dent;
893 lowest_dent_key(c, &key, dir->i_ino);
894 dent = ubifs_tnc_next_ent(c, &key, &nm);
906 static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
908 struct ubifs_info *c = dir->i_sb->s_fs_info;
909 struct inode *inode = d_inode(dentry);
910 int err, sz_change, budgeted = 1;
911 struct ubifs_inode *dir_ui = ubifs_inode(dir);
912 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
913 struct fscrypt_name nm;
916 * Budget request settings: deletion direntry, deletion inode and
917 * changing the parent inode. If budgeting fails, go ahead anyway
918 * because we have extra space reserved for deletions.
921 dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
922 inode->i_ino, dir->i_ino);
923 ubifs_assert(inode_is_locked(dir));
924 ubifs_assert(inode_is_locked(inode));
925 err = ubifs_check_dir_empty(d_inode(dentry));
929 if (ubifs_crypt_is_encrypted(dir)) {
930 err = fscrypt_get_encryption_info(dir);
931 if (err && err != -ENOKEY)
935 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
939 sz_change = CALC_DENT_SIZE(fname_len(&nm));
941 err = ubifs_budget_space(c, &req);
948 lock_2_inodes(dir, inode);
949 inode->i_ctime = current_time(dir);
952 dir->i_size -= sz_change;
953 dir_ui->ui_size = dir->i_size;
954 dir->i_mtime = dir->i_ctime = inode->i_ctime;
955 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
958 unlock_2_inodes(dir, inode);
961 ubifs_release_budget(c, &req);
963 /* We've deleted something - clean the "no space" flags */
964 c->bi.nospace = c->bi.nospace_rp = 0;
967 fscrypt_free_filename(&nm);
971 dir->i_size += sz_change;
972 dir_ui->ui_size = dir->i_size;
975 unlock_2_inodes(dir, inode);
977 ubifs_release_budget(c, &req);
979 fscrypt_free_filename(&nm);
983 static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
986 struct ubifs_inode *dir_ui = ubifs_inode(dir);
987 struct ubifs_info *c = dir->i_sb->s_fs_info;
989 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
990 struct fscrypt_name nm;
993 * Budget request settings: new inode, new direntry and changing parent
997 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
998 dentry, mode, dir->i_ino);
1000 err = ubifs_budget_space(c, &req);
1004 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1008 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1010 inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
1011 if (IS_ERR(inode)) {
1012 err = PTR_ERR(inode);
1016 err = ubifs_init_security(dir, inode, &dentry->d_name);
1020 mutex_lock(&dir_ui->ui_mutex);
1021 insert_inode_hash(inode);
1024 dir->i_size += sz_change;
1025 dir_ui->ui_size = dir->i_size;
1026 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1027 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1029 ubifs_err(c, "cannot create directory, error %d", err);
1032 mutex_unlock(&dir_ui->ui_mutex);
1034 ubifs_release_budget(c, &req);
1035 d_instantiate(dentry, inode);
1036 fscrypt_free_filename(&nm);
1040 dir->i_size -= sz_change;
1041 dir_ui->ui_size = dir->i_size;
1043 mutex_unlock(&dir_ui->ui_mutex);
1045 make_bad_inode(inode);
1048 fscrypt_free_filename(&nm);
1050 ubifs_release_budget(c, &req);
1054 static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
1055 umode_t mode, dev_t rdev)
1057 struct inode *inode;
1058 struct ubifs_inode *ui;
1059 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1060 struct ubifs_info *c = dir->i_sb->s_fs_info;
1061 union ubifs_dev_desc *dev = NULL;
1063 int err, devlen = 0;
1064 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1066 struct fscrypt_name nm;
1069 * Budget request settings: new inode, new direntry and changing parent
1073 dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
1075 if (S_ISBLK(mode) || S_ISCHR(mode)) {
1076 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1079 devlen = ubifs_encode_dev(dev, rdev);
1082 req.new_ino_d = ALIGN(devlen, 8);
1083 err = ubifs_budget_space(c, &req);
1089 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1095 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1097 inode = ubifs_new_inode(c, dir, mode);
1098 if (IS_ERR(inode)) {
1100 err = PTR_ERR(inode);
1104 init_special_inode(inode, inode->i_mode, rdev);
1105 inode->i_size = ubifs_inode(inode)->ui_size = devlen;
1106 ui = ubifs_inode(inode);
1108 ui->data_len = devlen;
1110 err = ubifs_init_security(dir, inode, &dentry->d_name);
1114 mutex_lock(&dir_ui->ui_mutex);
1115 dir->i_size += sz_change;
1116 dir_ui->ui_size = dir->i_size;
1117 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1118 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1121 mutex_unlock(&dir_ui->ui_mutex);
1123 ubifs_release_budget(c, &req);
1124 insert_inode_hash(inode);
1125 d_instantiate(dentry, inode);
1126 fscrypt_free_filename(&nm);
1130 dir->i_size -= sz_change;
1131 dir_ui->ui_size = dir->i_size;
1132 mutex_unlock(&dir_ui->ui_mutex);
1134 make_bad_inode(inode);
1137 fscrypt_free_filename(&nm);
1139 ubifs_release_budget(c, &req);
1143 static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
1144 const char *symname)
1146 struct inode *inode;
1147 struct ubifs_inode *ui;
1148 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1149 struct ubifs_info *c = dir->i_sb->s_fs_info;
1150 int err, len = strlen(symname);
1151 int sz_change = CALC_DENT_SIZE(len);
1152 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
1153 struct fscrypt_symlink_data *sd = NULL;
1154 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1155 .new_ino_d = ALIGN(len, 8),
1157 struct fscrypt_name nm;
1159 if (ubifs_crypt_is_encrypted(dir)) {
1160 err = fscrypt_get_encryption_info(dir);
1164 if (!fscrypt_has_encryption_key(dir)) {
1169 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
1170 sizeof(struct fscrypt_symlink_data));
1174 * Budget request settings: new inode, new direntry and changing parent
1178 dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
1179 symname, dir->i_ino);
1181 if (disk_link.len > UBIFS_MAX_INO_DATA)
1182 return -ENAMETOOLONG;
1184 err = ubifs_budget_space(c, &req);
1188 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
1192 inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
1193 if (IS_ERR(inode)) {
1194 err = PTR_ERR(inode);
1198 ui = ubifs_inode(inode);
1199 ui->data = kmalloc(disk_link.len, GFP_NOFS);
1205 if (ubifs_crypt_is_encrypted(dir)) {
1206 struct qstr istr = QSTR_INIT(symname, len);
1207 struct fscrypt_str ostr;
1209 sd = kzalloc(disk_link.len, GFP_NOFS);
1215 ostr.name = sd->encrypted_path;
1216 ostr.len = disk_link.len;
1218 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
1222 sd->len = cpu_to_le16(ostr.len);
1223 disk_link.name = (char *)sd;
1225 inode->i_link = ui->data;
1228 memcpy(ui->data, disk_link.name, disk_link.len);
1229 ((char *)ui->data)[disk_link.len - 1] = '\0';
1232 * The terminating zero byte is not written to the flash media and it
1233 * is put just to make later in-memory string processing simpler. Thus,
1234 * data length is @len, not @len + %1.
1236 ui->data_len = disk_link.len - 1;
1237 inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
1239 err = ubifs_init_security(dir, inode, &dentry->d_name);
1243 mutex_lock(&dir_ui->ui_mutex);
1244 dir->i_size += sz_change;
1245 dir_ui->ui_size = dir->i_size;
1246 dir->i_mtime = dir->i_ctime = inode->i_ctime;
1247 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1250 mutex_unlock(&dir_ui->ui_mutex);
1252 insert_inode_hash(inode);
1253 d_instantiate(dentry, inode);
1258 dir->i_size -= sz_change;
1259 dir_ui->ui_size = dir->i_size;
1260 mutex_unlock(&dir_ui->ui_mutex);
1262 make_bad_inode(inode);
1265 fscrypt_free_filename(&nm);
1267 ubifs_release_budget(c, &req);
1273 * lock_4_inodes - a wrapper for locking three UBIFS inodes.
1274 * @inode1: first inode
1275 * @inode2: second inode
1276 * @inode3: third inode
1277 * @inode4: fouth inode
1279 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
1280 * @inode2 whereas @inode3 and @inode4 may be %NULL.
1282 * We do not implement any tricks to guarantee strict lock ordering, because
1283 * VFS has already done it for us on the @i_mutex. So this is just a simple
1286 static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
1287 struct inode *inode3, struct inode *inode4)
1289 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
1290 if (inode2 != inode1)
1291 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
1293 mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
1295 mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
1299 * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
1300 * @inode1: first inode
1301 * @inode2: second inode
1302 * @inode3: third inode
1303 * @inode4: fouth inode
1305 static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
1306 struct inode *inode3, struct inode *inode4)
1309 mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
1311 mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
1312 if (inode1 != inode2)
1313 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
1314 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
1317 static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
1318 struct inode *new_dir, struct dentry *new_dentry,
1321 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1322 struct inode *old_inode = d_inode(old_dentry);
1323 struct inode *new_inode = d_inode(new_dentry);
1324 struct inode *whiteout = NULL;
1325 struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
1326 struct ubifs_inode *whiteout_ui = NULL;
1327 int err, release, sync = 0, move = (new_dir != old_dir);
1328 int is_dir = S_ISDIR(old_inode->i_mode);
1329 int unlink = !!new_inode, new_sz, old_sz;
1330 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1332 struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
1333 .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
1334 struct timespec time;
1335 unsigned int uninitialized_var(saved_nlink);
1336 struct fscrypt_name old_nm, new_nm;
1339 * Budget request settings: deletion direntry, new direntry, removing
1340 * the old inode, and changing old and new parent directory inodes.
1342 * However, this operation also marks the target inode as dirty and
1343 * does not write it, so we allocate budget for the target inode
1347 dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
1348 old_dentry, old_inode->i_ino, old_dir->i_ino,
1349 new_dentry, new_dir->i_ino, flags);
1352 ubifs_assert(inode_is_locked(new_inode));
1354 if (old_dir != new_dir) {
1355 if (ubifs_crypt_is_encrypted(new_dir) &&
1356 !fscrypt_has_permitted_context(new_dir, old_inode))
1360 if (unlink && is_dir) {
1361 err = ubifs_check_dir_empty(new_inode);
1366 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
1370 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
1372 fscrypt_free_filename(&old_nm);
1376 new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
1377 old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
1379 err = ubifs_budget_space(c, &req);
1381 fscrypt_free_filename(&old_nm);
1382 fscrypt_free_filename(&new_nm);
1385 err = ubifs_budget_space(c, &ino_req);
1387 fscrypt_free_filename(&old_nm);
1388 fscrypt_free_filename(&new_nm);
1389 ubifs_release_budget(c, &req);
1393 if (flags & RENAME_WHITEOUT) {
1394 union ubifs_dev_desc *dev = NULL;
1396 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1402 err = do_tmpfile(old_dir, old_dentry, S_IFCHR | WHITEOUT_MODE, &whiteout);
1408 whiteout->i_state |= I_LINKABLE;
1409 whiteout_ui = ubifs_inode(whiteout);
1410 whiteout_ui->data = dev;
1411 whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
1412 ubifs_assert(!whiteout_ui->dirty);
1415 lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1418 * Like most other Unix systems, set the @i_ctime for inodes on a
1421 time = current_time(old_dir);
1422 old_inode->i_ctime = time;
1424 /* We must adjust parent link count when renaming directories */
1428 * @old_dir loses a link because we are moving
1429 * @old_inode to a different directory.
1431 drop_nlink(old_dir);
1433 * @new_dir only gains a link if we are not also
1434 * overwriting an existing directory.
1440 * @old_inode is not moving to a different directory,
1441 * but @old_dir still loses a link if we are
1442 * overwriting an existing directory.
1445 drop_nlink(old_dir);
1449 old_dir->i_size -= old_sz;
1450 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1451 old_dir->i_mtime = old_dir->i_ctime = time;
1452 new_dir->i_mtime = new_dir->i_ctime = time;
1455 * And finally, if we unlinked a direntry which happened to have the
1456 * same name as the moved direntry, we have to decrement @i_nlink of
1457 * the unlinked inode and change its ctime.
1461 * Directories cannot have hard-links, so if this is a
1462 * directory, just clear @i_nlink.
1464 saved_nlink = new_inode->i_nlink;
1466 clear_nlink(new_inode);
1468 drop_nlink(new_inode);
1469 new_inode->i_ctime = time;
1471 new_dir->i_size += new_sz;
1472 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1476 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
1477 * is dirty, because this will be done later on at the end of
1480 if (IS_SYNC(old_inode)) {
1481 sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1482 if (unlink && IS_SYNC(new_inode))
1487 struct ubifs_budget_req wht_req = { .dirtied_ino = 1,
1489 ALIGN(ubifs_inode(whiteout)->data_len, 8) };
1491 err = ubifs_budget_space(c, &wht_req);
1493 kfree(whiteout_ui->data);
1494 whiteout_ui->data_len = 0;
1499 inc_nlink(whiteout);
1500 mark_inode_dirty(whiteout);
1501 whiteout->i_state &= ~I_LINKABLE;
1505 err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
1506 new_inode, &new_nm, whiteout, sync);
1510 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1511 ubifs_release_budget(c, &req);
1513 mutex_lock(&old_inode_ui->ui_mutex);
1514 release = old_inode_ui->dirty;
1515 mark_inode_dirty_sync(old_inode);
1516 mutex_unlock(&old_inode_ui->ui_mutex);
1519 ubifs_release_budget(c, &ino_req);
1520 if (IS_SYNC(old_inode))
1521 err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
1523 fscrypt_free_filename(&old_nm);
1524 fscrypt_free_filename(&new_nm);
1529 set_nlink(new_inode, saved_nlink);
1531 new_dir->i_size -= new_sz;
1532 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1534 old_dir->i_size += old_sz;
1535 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1540 drop_nlink(new_dir);
1547 drop_nlink(whiteout);
1550 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1552 ubifs_release_budget(c, &ino_req);
1553 ubifs_release_budget(c, &req);
1554 fscrypt_free_filename(&old_nm);
1555 fscrypt_free_filename(&new_nm);
1559 static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
1560 struct inode *new_dir, struct dentry *new_dentry)
1562 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1563 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1565 int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1566 struct inode *fst_inode = d_inode(old_dentry);
1567 struct inode *snd_inode = d_inode(new_dentry);
1568 struct timespec time;
1570 struct fscrypt_name fst_nm, snd_nm;
1572 ubifs_assert(fst_inode && snd_inode);
1574 if ((ubifs_crypt_is_encrypted(old_dir) ||
1575 ubifs_crypt_is_encrypted(new_dir)) &&
1576 (old_dir != new_dir) &&
1577 (!fscrypt_has_permitted_context(new_dir, fst_inode) ||
1578 !fscrypt_has_permitted_context(old_dir, snd_inode)))
1581 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
1585 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
1587 fscrypt_free_filename(&fst_nm);
1591 lock_4_inodes(old_dir, new_dir, NULL, NULL);
1593 time = current_time(old_dir);
1594 fst_inode->i_ctime = time;
1595 snd_inode->i_ctime = time;
1596 old_dir->i_mtime = old_dir->i_ctime = time;
1597 new_dir->i_mtime = new_dir->i_ctime = time;
1599 if (old_dir != new_dir) {
1600 if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
1602 drop_nlink(old_dir);
1604 else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
1605 drop_nlink(new_dir);
1610 err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
1611 snd_inode, &snd_nm, sync);
1613 unlock_4_inodes(old_dir, new_dir, NULL, NULL);
1614 ubifs_release_budget(c, &req);
1616 fscrypt_free_filename(&fst_nm);
1617 fscrypt_free_filename(&snd_nm);
1621 static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
1622 struct inode *new_dir, struct dentry *new_dentry,
1625 if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
1628 ubifs_assert(inode_is_locked(old_dir));
1629 ubifs_assert(inode_is_locked(new_dir));
1631 if (flags & RENAME_EXCHANGE)
1632 return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
1634 return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1637 int ubifs_getattr(const struct path *path, struct kstat *stat,
1638 u32 request_mask, unsigned int flags)
1641 struct inode *inode = d_inode(path->dentry);
1642 struct ubifs_inode *ui = ubifs_inode(inode);
1644 mutex_lock(&ui->ui_mutex);
1646 if (ui->flags & UBIFS_APPEND_FL)
1647 stat->attributes |= STATX_ATTR_APPEND;
1648 if (ui->flags & UBIFS_COMPR_FL)
1649 stat->attributes |= STATX_ATTR_COMPRESSED;
1650 if (ui->flags & UBIFS_CRYPT_FL)
1651 stat->attributes |= STATX_ATTR_ENCRYPTED;
1652 if (ui->flags & UBIFS_IMMUTABLE_FL)
1653 stat->attributes |= STATX_ATTR_IMMUTABLE;
1655 stat->attributes_mask |= (STATX_ATTR_APPEND |
1656 STATX_ATTR_COMPRESSED |
1657 STATX_ATTR_ENCRYPTED |
1658 STATX_ATTR_IMMUTABLE);
1660 generic_fillattr(inode, stat);
1661 stat->blksize = UBIFS_BLOCK_SIZE;
1662 stat->size = ui->ui_size;
1665 * Unfortunately, the 'stat()' system call was designed for block
1666 * device based file systems, and it is not appropriate for UBIFS,
1667 * because UBIFS does not have notion of "block". For example, it is
1668 * difficult to tell how many block a directory takes - it actually
1669 * takes less than 300 bytes, but we have to round it to block size,
1670 * which introduces large mistake. This makes utilities like 'du' to
1671 * report completely senseless numbers. This is the reason why UBIFS
1672 * goes the same way as JFFS2 - it reports zero blocks for everything
1673 * but regular files, which makes more sense than reporting completely
1676 if (S_ISREG(inode->i_mode)) {
1677 size = ui->xattr_size;
1679 size = ALIGN(size, UBIFS_BLOCK_SIZE);
1681 * Note, user-space expects 512-byte blocks count irrespectively
1682 * of what was reported in @stat->size.
1684 stat->blocks = size >> 9;
1687 mutex_unlock(&ui->ui_mutex);
1691 static int ubifs_dir_open(struct inode *dir, struct file *file)
1693 if (ubifs_crypt_is_encrypted(dir))
1694 return fscrypt_get_encryption_info(dir) ? -EACCES : 0;
1699 const struct inode_operations ubifs_dir_inode_operations = {
1700 .lookup = ubifs_lookup,
1701 .create = ubifs_create,
1703 .symlink = ubifs_symlink,
1704 .unlink = ubifs_unlink,
1705 .mkdir = ubifs_mkdir,
1706 .rmdir = ubifs_rmdir,
1707 .mknod = ubifs_mknod,
1708 .rename = ubifs_rename,
1709 .setattr = ubifs_setattr,
1710 .getattr = ubifs_getattr,
1711 .listxattr = ubifs_listxattr,
1712 #ifdef CONFIG_UBIFS_ATIME_SUPPORT
1713 .update_time = ubifs_update_time,
1715 .tmpfile = ubifs_tmpfile,
1718 const struct file_operations ubifs_dir_operations = {
1719 .llseek = generic_file_llseek,
1720 .release = ubifs_dir_release,
1721 .read = generic_read_dir,
1722 .iterate_shared = ubifs_readdir,
1723 .fsync = ubifs_fsync,
1724 .unlocked_ioctl = ubifs_ioctl,
1725 .open = ubifs_dir_open,
1726 #ifdef CONFIG_COMPAT
1727 .compat_ioctl = ubifs_compat_ioctl,