1 // SPDX-License-Identifier: GPL-2.0-only
2 /* * This file is part of UBIFS.
4 * Copyright (C) 2006-2008 Nokia Corporation.
5 * Copyright (C) 2006, 2007 University of Szeged, Hungary
7 * Authors: Artem Bityutskiy (Битюцкий Артём)
13 * This file implements directory operations.
15 * All FS operations in this file allocate budget before writing anything to the
16 * media. If they fail to allocate it, the error is returned. The only
17 * exceptions are 'ubifs_unlink()' and 'ubifs_rmdir()' which keep working even
18 * if they unable to allocate the budget, because deletion %-ENOSPC failure is
19 * not what users are usually ready to get. UBIFS budgeting subsystem has some
20 * space reserved for these purposes.
22 * All operations in this file write all inodes which they change straight
23 * away, instead of marking them dirty. For example, 'ubifs_link()' changes
24 * @i_size of the parent inode and writes the parent inode together with the
25 * target inode. This was done to simplify file-system recovery which would
26 * otherwise be very difficult to do. The only exception is rename which marks
27 * the re-named inode dirty (because its @i_ctime is updated) but does not
28 * write it, but just marks it as dirty.
34 * inherit_flags - inherit flags of the parent inode.
36 * @mode: new inode mode flags
38 * This is a helper function for 'ubifs_new_inode()' which inherits flag of the
39 * parent directory inode @dir. UBIFS inodes inherit the following flags:
40 * o %UBIFS_COMPR_FL, which is useful to switch compression on/of on
41 * sub-directory basis;
42 * o %UBIFS_SYNC_FL - useful for the same reasons;
43 * o %UBIFS_DIRSYNC_FL - similar, but relevant only to directories.
45 * This function returns the inherited flags.
47 static int inherit_flags(const struct inode *dir, umode_t mode)
50 const struct ubifs_inode *ui = ubifs_inode(dir);
52 if (!S_ISDIR(dir->i_mode))
54 * The parent is not a directory, which means that an extended
55 * attribute inode is being created. No flags.
59 flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL);
61 /* The "DIRSYNC" flag only applies to directories */
62 flags &= ~UBIFS_DIRSYNC_FL;
67 * ubifs_new_inode - allocate new UBIFS inode object.
68 * @c: UBIFS file-system description object
69 * @dir: parent directory inode
70 * @mode: inode mode flags
71 * @is_xattr: whether the inode is xattr inode
73 * This function finds an unused inode number, allocates new inode and
74 * initializes it. Returns new inode in case of success and an error code in
77 struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
78 umode_t mode, bool is_xattr)
82 struct ubifs_inode *ui;
83 bool encrypted = false;
85 inode = new_inode(c->vfs_sb);
86 ui = ubifs_inode(inode);
88 return ERR_PTR(-ENOMEM);
91 * Set 'S_NOCMTIME' to prevent VFS form updating [mc]time of inodes and
92 * marking them dirty in file write path (see 'file_update_time()').
93 * UBIFS has to fully control "clean <-> dirty" transitions of inodes
94 * to make budgeting work.
96 inode->i_flags |= S_NOCMTIME;
98 inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
99 simple_inode_init_ts(inode);
100 inode->i_mapping->nrpages = 0;
103 err = fscrypt_prepare_new_inode(dir, inode, &encrypted);
105 ubifs_err(c, "fscrypt_prepare_new_inode failed: %i", err);
110 switch (mode & S_IFMT) {
112 inode->i_mapping->a_ops = &ubifs_file_address_operations;
113 inode->i_op = &ubifs_file_inode_operations;
114 inode->i_fop = &ubifs_file_operations;
117 inode->i_op = &ubifs_dir_inode_operations;
118 inode->i_fop = &ubifs_dir_operations;
119 inode->i_size = ui->ui_size = UBIFS_INO_NODE_SZ;
122 inode->i_op = &ubifs_symlink_inode_operations;
128 inode->i_op = &ubifs_file_inode_operations;
134 ui->flags = inherit_flags(dir, mode);
135 ubifs_set_inode_flags(inode);
137 ui->compr_type = c->default_compr;
139 ui->compr_type = UBIFS_COMPR_NONE;
140 ui->synced_i_size = 0;
142 spin_lock(&c->cnt_lock);
143 /* Inode number overflow is currently not supported */
144 if (c->highest_inum >= INUM_WARN_WATERMARK) {
145 if (c->highest_inum >= INUM_WATERMARK) {
146 spin_unlock(&c->cnt_lock);
147 ubifs_err(c, "out of inode numbers");
151 ubifs_warn(c, "running out of inode numbers (current %lu, max %u)",
152 (unsigned long)c->highest_inum, INUM_WATERMARK);
155 inode->i_ino = ++c->highest_inum;
157 * The creation sequence number remains with this inode for its
158 * lifetime. All nodes for this inode have a greater sequence number,
159 * and so it is possible to distinguish obsolete nodes belonging to a
160 * previous incarnation of the same inode number - for example, for the
161 * purpose of rebuilding the index.
163 ui->creat_sqnum = ++c->max_sqnum;
164 spin_unlock(&c->cnt_lock);
167 err = fscrypt_set_context(inode, NULL);
169 ubifs_err(c, "fscrypt_set_context failed: %i", err);
177 make_bad_inode(inode);
182 static int dbg_check_name(const struct ubifs_info *c,
183 const struct ubifs_dent_node *dent,
184 const struct fscrypt_name *nm)
186 if (!dbg_is_chk_gen(c))
188 if (le16_to_cpu(dent->nlen) != fname_len(nm))
190 if (memcmp(dent->name, fname_name(nm), fname_len(nm)))
195 static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
200 struct inode *inode = NULL;
201 struct ubifs_dent_node *dent = NULL;
202 struct ubifs_info *c = dir->i_sb->s_fs_info;
203 struct fscrypt_name nm;
205 dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);
207 err = fscrypt_prepare_lookup(dir, dentry, &nm);
209 return d_splice_alias(NULL, dentry);
213 if (fname_len(&nm) > UBIFS_MAX_NLEN) {
214 inode = ERR_PTR(-ENAMETOOLONG);
218 dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
220 inode = ERR_PTR(-ENOMEM);
224 if (fname_name(&nm) == NULL) {
225 if (nm.hash & ~UBIFS_S_KEY_HASH_MASK)
226 goto done; /* ENOENT */
227 dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
228 err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
230 dent_key_init(c, &key, dir->i_ino, &nm);
231 err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
236 dbg_gen("not found");
238 inode = ERR_PTR(err);
242 if (dbg_check_name(c, dent, &nm)) {
243 inode = ERR_PTR(-EINVAL);
247 inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
250 * This should not happen. Probably the file-system needs
253 err = PTR_ERR(inode);
254 ubifs_err(c, "dead directory entry '%pd', error %d",
256 ubifs_ro_mode(c, err);
260 if (IS_ENCRYPTED(dir) &&
261 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
262 !fscrypt_has_permitted_context(dir, inode)) {
263 ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
264 dir->i_ino, inode->i_ino);
266 inode = ERR_PTR(-EPERM);
271 fscrypt_free_filename(&nm);
272 return d_splice_alias(inode, dentry);
275 static int ubifs_prepare_create(struct inode *dir, struct dentry *dentry,
276 struct fscrypt_name *nm)
278 if (fscrypt_is_nokey_name(dentry))
281 return fscrypt_setup_filename(dir, &dentry->d_name, 0, nm);
284 static int ubifs_create(struct mnt_idmap *idmap, struct inode *dir,
285 struct dentry *dentry, umode_t mode, bool excl)
288 struct ubifs_info *c = dir->i_sb->s_fs_info;
289 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
291 struct ubifs_inode *dir_ui = ubifs_inode(dir);
292 struct fscrypt_name nm;
296 * Budget request settings: new inode, new direntry, changing the
297 * parent directory inode.
300 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
301 dentry, mode, dir->i_ino);
303 err = ubifs_budget_space(c, &req);
307 err = ubifs_prepare_create(dir, dentry, &nm);
311 sz_change = CALC_DENT_SIZE(fname_len(&nm));
313 inode = ubifs_new_inode(c, dir, mode, false);
315 err = PTR_ERR(inode);
319 err = ubifs_init_security(dir, inode, &dentry->d_name);
323 mutex_lock(&dir_ui->ui_mutex);
324 dir->i_size += sz_change;
325 dir_ui->ui_size = dir->i_size;
326 inode_set_mtime_to_ts(dir,
327 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
328 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
331 mutex_unlock(&dir_ui->ui_mutex);
333 ubifs_release_budget(c, &req);
334 fscrypt_free_filename(&nm);
335 insert_inode_hash(inode);
336 d_instantiate(dentry, inode);
340 dir->i_size -= sz_change;
341 dir_ui->ui_size = dir->i_size;
342 mutex_unlock(&dir_ui->ui_mutex);
344 make_bad_inode(inode);
347 fscrypt_free_filename(&nm);
349 ubifs_release_budget(c, &req);
350 ubifs_err(c, "cannot create regular file, error %d", err);
354 static struct inode *create_whiteout(struct inode *dir, struct dentry *dentry)
357 umode_t mode = S_IFCHR | WHITEOUT_MODE;
359 struct ubifs_info *c = dir->i_sb->s_fs_info;
362 * Create an inode('nlink = 1') for whiteout without updating journal,
363 * let ubifs_jnl_rename() store it on flash to complete rename whiteout
367 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
368 dentry, mode, dir->i_ino);
370 inode = ubifs_new_inode(c, dir, mode, false);
372 err = PTR_ERR(inode);
376 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
377 ubifs_assert(c, inode->i_op == &ubifs_file_inode_operations);
379 err = ubifs_init_security(dir, inode, &dentry->d_name);
383 /* The dir size is updated by do_rename. */
384 insert_inode_hash(inode);
389 make_bad_inode(inode);
392 ubifs_err(c, "cannot create whiteout file, error %d", err);
397 * lock_2_inodes - a wrapper for locking two UBIFS inodes.
398 * @inode1: first inode
399 * @inode2: second inode
401 * We do not implement any tricks to guarantee strict lock ordering, because
402 * VFS has already done it for us on the @i_mutex. So this is just a simple
405 static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
407 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
408 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
412 * unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
413 * @inode1: first inode
414 * @inode2: second inode
416 static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
418 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
419 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
422 static int ubifs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
423 struct file *file, umode_t mode)
425 struct dentry *dentry = file->f_path.dentry;
427 struct ubifs_info *c = dir->i_sb->s_fs_info;
428 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
430 struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
431 struct ubifs_inode *ui;
432 int err, instantiated = 0;
433 struct fscrypt_name nm;
436 * Budget request settings: new inode, new direntry, changing the
437 * parent directory inode.
438 * Allocate budget separately for new dirtied inode, the budget will
439 * be released via writeback.
442 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
443 dentry, mode, dir->i_ino);
445 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
449 err = ubifs_budget_space(c, &req);
451 fscrypt_free_filename(&nm);
455 err = ubifs_budget_space(c, &ino_req);
457 ubifs_release_budget(c, &req);
458 fscrypt_free_filename(&nm);
462 inode = ubifs_new_inode(c, dir, mode, false);
464 err = PTR_ERR(inode);
467 ui = ubifs_inode(inode);
469 err = ubifs_init_security(dir, inode, &dentry->d_name);
473 mutex_lock(&ui->ui_mutex);
474 insert_inode_hash(inode);
475 d_tmpfile(file, inode);
476 ubifs_assert(c, ui->dirty);
479 mutex_unlock(&ui->ui_mutex);
481 lock_2_inodes(dir, inode);
482 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
485 unlock_2_inodes(dir, inode);
487 ubifs_release_budget(c, &req);
488 fscrypt_free_filename(&nm);
490 return finish_open_simple(file, 0);
493 unlock_2_inodes(dir, inode);
495 make_bad_inode(inode);
499 ubifs_release_budget(c, &req);
501 ubifs_release_budget(c, &ino_req);
502 fscrypt_free_filename(&nm);
503 ubifs_err(c, "cannot create temporary file, error %d", err);
508 * vfs_dent_type - get VFS directory entry type.
509 * @type: UBIFS directory entry type
511 * This function converts UBIFS directory entry type into VFS directory entry
514 static unsigned int vfs_dent_type(uint8_t type)
517 case UBIFS_ITYPE_REG:
519 case UBIFS_ITYPE_DIR:
521 case UBIFS_ITYPE_LNK:
523 case UBIFS_ITYPE_BLK:
525 case UBIFS_ITYPE_CHR:
527 case UBIFS_ITYPE_FIFO:
529 case UBIFS_ITYPE_SOCK:
538 * The classical Unix view for directory is that it is a linear array of
539 * (name, inode number) entries. Linux/VFS assumes this model as well.
540 * Particularly, 'readdir()' call wants us to return a directory entry offset
541 * which later may be used to continue 'readdir()'ing the directory or to
542 * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
543 * model because directory entries are identified by keys, which may collide.
545 * UBIFS uses directory entry hash value for directory offsets, so
546 * 'seekdir()'/'telldir()' may not always work because of possible key
547 * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
548 * properly by means of saving full directory entry name in the private field
549 * of the file description object.
551 * This means that UBIFS cannot support NFS which requires full
552 * 'seekdir()'/'telldir()' support.
554 static int ubifs_readdir(struct file *file, struct dir_context *ctx)
556 int fstr_real_len = 0, err = 0;
557 struct fscrypt_name nm;
558 struct fscrypt_str fstr = {0};
560 struct ubifs_dent_node *dent;
561 struct inode *dir = file_inode(file);
562 struct ubifs_info *c = dir->i_sb->s_fs_info;
563 bool encrypted = IS_ENCRYPTED(dir);
565 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
567 if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
569 * The directory was seek'ed to a senseless position or there
570 * are no more entries.
575 err = fscrypt_prepare_readdir(dir);
579 err = fscrypt_fname_alloc_buffer(UBIFS_MAX_NLEN, &fstr);
583 fstr_real_len = fstr.len;
586 if (file->f_version == 0) {
588 * The file was seek'ed, which means that @file->private_data
589 * is now invalid. This may also be just the first
590 * 'ubifs_readdir()' invocation, in which case
591 * @file->private_data is NULL, and the below code is
594 kfree(file->private_data);
595 file->private_data = NULL;
599 * 'generic_file_llseek()' unconditionally sets @file->f_version to
600 * zero, and we use this for detecting whether the file was seek'ed.
604 /* File positions 0 and 1 correspond to "." and ".." */
606 ubifs_assert(c, !file->private_data);
607 if (!dir_emit_dots(file, ctx)) {
609 fscrypt_fname_free_buffer(&fstr);
613 /* Find the first entry in TNC and save it */
614 lowest_dent_key(c, &key, dir->i_ino);
616 dent = ubifs_tnc_next_ent(c, &key, &nm);
622 ctx->pos = key_hash_flash(c, &dent->key);
623 file->private_data = dent;
626 dent = file->private_data;
629 * The directory was seek'ed to and is now readdir'ed.
630 * Find the entry corresponding to @ctx->pos or the closest one.
632 dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
634 dent = ubifs_tnc_next_ent(c, &key, &nm);
639 ctx->pos = key_hash_flash(c, &dent->key);
640 file->private_data = dent;
644 dbg_gen("ino %llu, new f_pos %#x",
645 (unsigned long long)le64_to_cpu(dent->inum),
646 key_hash_flash(c, &dent->key));
647 ubifs_assert(c, le64_to_cpu(dent->ch.sqnum) >
648 ubifs_inode(dir)->creat_sqnum);
650 fname_len(&nm) = le16_to_cpu(dent->nlen);
651 fname_name(&nm) = dent->name;
654 fstr.len = fstr_real_len;
656 err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c,
658 le32_to_cpu(dent->cookie),
659 &nm.disk_name, &fstr);
663 fstr.len = fname_len(&nm);
664 fstr.name = fname_name(&nm);
667 if (!dir_emit(ctx, fstr.name, fstr.len,
668 le64_to_cpu(dent->inum),
669 vfs_dent_type(dent->type))) {
671 fscrypt_fname_free_buffer(&fstr);
675 /* Switch to the next entry */
676 key_read(c, &dent->key, &key);
677 dent = ubifs_tnc_next_ent(c, &key, &nm);
683 kfree(file->private_data);
684 ctx->pos = key_hash_flash(c, &dent->key);
685 file->private_data = dent;
690 kfree(file->private_data);
691 file->private_data = NULL;
694 fscrypt_fname_free_buffer(&fstr);
697 ubifs_err(c, "cannot find next direntry, error %d", err);
700 * -ENOENT is a non-fatal error in this context, the TNC uses
701 * it to indicate that the cursor moved past the current directory
702 * and readdir() has to stop.
707 /* 2 is a special value indicating that there are no more direntries */
712 /* Free saved readdir() state when the directory is closed */
713 static int ubifs_dir_release(struct inode *dir, struct file *file)
715 kfree(file->private_data);
716 file->private_data = NULL;
720 static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
721 struct dentry *dentry)
723 struct ubifs_info *c = dir->i_sb->s_fs_info;
724 struct inode *inode = d_inode(old_dentry);
725 struct ubifs_inode *ui = ubifs_inode(inode);
726 struct ubifs_inode *dir_ui = ubifs_inode(dir);
728 struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
729 .dirtied_ino_d = ALIGN(ui->data_len, 8) };
730 struct fscrypt_name nm;
733 * Budget request settings: new direntry, changing the target inode,
734 * changing the parent inode.
737 dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
738 dentry, inode->i_ino,
739 inode->i_nlink, dir->i_ino);
740 ubifs_assert(c, inode_is_locked(dir));
741 ubifs_assert(c, inode_is_locked(inode));
743 err = fscrypt_prepare_link(old_dentry, dir, dentry);
747 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
751 sz_change = CALC_DENT_SIZE(fname_len(&nm));
753 err = dbg_check_synced_i_size(c, inode);
757 err = ubifs_budget_space(c, &req);
761 lock_2_inodes(dir, inode);
763 /* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
764 if (inode->i_nlink == 0)
765 ubifs_delete_orphan(c, inode->i_ino);
769 inode_set_ctime_current(inode);
770 dir->i_size += sz_change;
771 dir_ui->ui_size = dir->i_size;
772 inode_set_mtime_to_ts(dir,
773 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
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 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
823 err = ubifs_purge_xattrs(inode);
827 sz_change = CALC_DENT_SIZE(fname_len(&nm));
829 ubifs_assert(c, inode_is_locked(dir));
830 ubifs_assert(c, inode_is_locked(inode));
831 err = dbg_check_synced_i_size(c, inode);
835 err = ubifs_budget_space(c, &req);
842 lock_2_inodes(dir, inode);
843 inode_set_ctime_current(inode);
845 dir->i_size -= sz_change;
846 dir_ui->ui_size = dir->i_size;
847 inode_set_mtime_to_ts(dir,
848 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
849 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
852 unlock_2_inodes(dir, inode);
855 ubifs_release_budget(c, &req);
857 /* We've deleted something - clean the "no space" flags */
858 c->bi.nospace = c->bi.nospace_rp = 0;
861 fscrypt_free_filename(&nm);
865 dir->i_size += sz_change;
866 dir_ui->ui_size = dir->i_size;
867 set_nlink(inode, saved_nlink);
868 unlock_2_inodes(dir, inode);
870 ubifs_release_budget(c, &req);
872 fscrypt_free_filename(&nm);
877 * ubifs_check_dir_empty - check if a directory is empty or not.
878 * @dir: VFS inode object of the directory to check
880 * This function checks if directory @dir is empty. Returns zero if the
881 * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
884 int ubifs_check_dir_empty(struct inode *dir)
886 struct ubifs_info *c = dir->i_sb->s_fs_info;
887 struct fscrypt_name nm = { 0 };
888 struct ubifs_dent_node *dent;
892 lowest_dent_key(c, &key, dir->i_ino);
893 dent = ubifs_tnc_next_ent(c, &key, &nm);
905 static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
907 struct ubifs_info *c = dir->i_sb->s_fs_info;
908 struct inode *inode = d_inode(dentry);
909 int err, sz_change, budgeted = 1;
910 struct ubifs_inode *dir_ui = ubifs_inode(dir);
911 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
912 struct fscrypt_name nm;
915 * Budget request settings: deletion direntry, deletion inode and
916 * changing the parent inode. If budgeting fails, go ahead anyway
917 * because we have extra space reserved for deletions.
920 dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
921 inode->i_ino, dir->i_ino);
922 ubifs_assert(c, inode_is_locked(dir));
923 ubifs_assert(c, inode_is_locked(inode));
924 err = ubifs_check_dir_empty(d_inode(dentry));
928 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
932 err = ubifs_purge_xattrs(inode);
936 sz_change = CALC_DENT_SIZE(fname_len(&nm));
938 err = ubifs_budget_space(c, &req);
945 lock_2_inodes(dir, inode);
946 inode_set_ctime_current(inode);
949 dir->i_size -= sz_change;
950 dir_ui->ui_size = dir->i_size;
951 inode_set_mtime_to_ts(dir,
952 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
953 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
956 unlock_2_inodes(dir, inode);
959 ubifs_release_budget(c, &req);
961 /* We've deleted something - clean the "no space" flags */
962 c->bi.nospace = c->bi.nospace_rp = 0;
965 fscrypt_free_filename(&nm);
969 dir->i_size += sz_change;
970 dir_ui->ui_size = dir->i_size;
973 unlock_2_inodes(dir, inode);
975 ubifs_release_budget(c, &req);
977 fscrypt_free_filename(&nm);
981 static int ubifs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
982 struct dentry *dentry, umode_t mode)
985 struct ubifs_inode *dir_ui = ubifs_inode(dir);
986 struct ubifs_info *c = dir->i_sb->s_fs_info;
988 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 = ubifs_prepare_create(dir, dentry, &nm);
1008 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1010 inode = ubifs_new_inode(c, dir, S_IFDIR | mode, false);
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 inode_set_mtime_to_ts(dir,
1027 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
1028 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1030 ubifs_err(c, "cannot create directory, error %d", err);
1033 mutex_unlock(&dir_ui->ui_mutex);
1035 ubifs_release_budget(c, &req);
1036 d_instantiate(dentry, inode);
1037 fscrypt_free_filename(&nm);
1041 dir->i_size -= sz_change;
1042 dir_ui->ui_size = dir->i_size;
1044 mutex_unlock(&dir_ui->ui_mutex);
1046 make_bad_inode(inode);
1049 fscrypt_free_filename(&nm);
1051 ubifs_release_budget(c, &req);
1055 static int ubifs_mknod(struct mnt_idmap *idmap, struct inode *dir,
1056 struct dentry *dentry, umode_t mode, dev_t rdev)
1058 struct inode *inode;
1059 struct ubifs_inode *ui;
1060 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1061 struct ubifs_info *c = dir->i_sb->s_fs_info;
1062 union ubifs_dev_desc *dev = NULL;
1064 int err, devlen = 0;
1065 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1067 struct fscrypt_name nm;
1070 * Budget request settings: new inode, new direntry and changing parent
1074 dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
1076 if (S_ISBLK(mode) || S_ISCHR(mode)) {
1077 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1080 devlen = ubifs_encode_dev(dev, rdev);
1083 req.new_ino_d = ALIGN(devlen, 8);
1084 err = ubifs_budget_space(c, &req);
1090 err = ubifs_prepare_create(dir, dentry, &nm);
1096 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1098 inode = ubifs_new_inode(c, dir, mode, false);
1099 if (IS_ERR(inode)) {
1101 err = PTR_ERR(inode);
1105 init_special_inode(inode, inode->i_mode, rdev);
1106 inode->i_size = ubifs_inode(inode)->ui_size = devlen;
1107 ui = ubifs_inode(inode);
1109 ui->data_len = devlen;
1111 err = ubifs_init_security(dir, inode, &dentry->d_name);
1115 mutex_lock(&dir_ui->ui_mutex);
1116 dir->i_size += sz_change;
1117 dir_ui->ui_size = dir->i_size;
1118 inode_set_mtime_to_ts(dir,
1119 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
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 /* Free inode->i_link before inode is marked as bad. */
1137 fscrypt_free_inode(inode);
1138 make_bad_inode(inode);
1141 fscrypt_free_filename(&nm);
1143 ubifs_release_budget(c, &req);
1147 static int ubifs_symlink(struct mnt_idmap *idmap, struct inode *dir,
1148 struct dentry *dentry, const char *symname)
1150 struct inode *inode;
1151 struct ubifs_inode *ui;
1152 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1153 struct ubifs_info *c = dir->i_sb->s_fs_info;
1154 int err, sz_change, len = strlen(symname);
1155 struct fscrypt_str disk_link;
1156 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1158 struct fscrypt_name nm;
1160 dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
1161 symname, dir->i_ino);
1163 err = fscrypt_prepare_symlink(dir, symname, len, UBIFS_MAX_INO_DATA,
1169 * Budget request settings: new inode, new direntry and changing parent
1172 req.new_ino_d = ALIGN(disk_link.len - 1, 8);
1173 err = ubifs_budget_space(c, &req);
1177 err = ubifs_prepare_create(dir, dentry, &nm);
1181 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1183 inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO, false);
1184 if (IS_ERR(inode)) {
1185 err = PTR_ERR(inode);
1189 ui = ubifs_inode(inode);
1190 ui->data = kmalloc(disk_link.len, GFP_NOFS);
1196 if (IS_ENCRYPTED(inode)) {
1197 disk_link.name = ui->data; /* encrypt directly into ui->data */
1198 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
1202 memcpy(ui->data, disk_link.name, disk_link.len);
1203 inode->i_link = ui->data;
1207 * The terminating zero byte is not written to the flash media and it
1208 * is put just to make later in-memory string processing simpler. Thus,
1209 * data length is @disk_link.len - 1, not @disk_link.len.
1211 ui->data_len = disk_link.len - 1;
1212 inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
1214 err = ubifs_init_security(dir, inode, &dentry->d_name);
1218 mutex_lock(&dir_ui->ui_mutex);
1219 dir->i_size += sz_change;
1220 dir_ui->ui_size = dir->i_size;
1221 inode_set_mtime_to_ts(dir,
1222 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
1223 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1226 mutex_unlock(&dir_ui->ui_mutex);
1228 insert_inode_hash(inode);
1229 d_instantiate(dentry, inode);
1234 dir->i_size -= sz_change;
1235 dir_ui->ui_size = dir->i_size;
1236 mutex_unlock(&dir_ui->ui_mutex);
1238 /* Free inode->i_link before inode is marked as bad. */
1239 fscrypt_free_inode(inode);
1240 make_bad_inode(inode);
1243 fscrypt_free_filename(&nm);
1245 ubifs_release_budget(c, &req);
1250 * lock_4_inodes - a wrapper for locking three UBIFS inodes.
1251 * @inode1: first inode
1252 * @inode2: second inode
1253 * @inode3: third inode
1254 * @inode4: fourth inode
1256 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
1257 * @inode2 whereas @inode3 and @inode4 may be %NULL.
1259 * We do not implement any tricks to guarantee strict lock ordering, because
1260 * VFS has already done it for us on the @i_mutex. So this is just a simple
1263 static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
1264 struct inode *inode3, struct inode *inode4)
1266 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
1267 if (inode2 != inode1)
1268 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
1270 mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
1272 mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
1276 * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
1277 * @inode1: first inode
1278 * @inode2: second inode
1279 * @inode3: third inode
1280 * @inode4: fourth inode
1282 static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
1283 struct inode *inode3, struct inode *inode4)
1286 mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
1288 mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
1289 if (inode1 != inode2)
1290 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
1291 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
1294 static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
1295 struct inode *new_dir, struct dentry *new_dentry,
1298 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1299 struct inode *old_inode = d_inode(old_dentry);
1300 struct inode *new_inode = d_inode(new_dentry);
1301 struct inode *whiteout = NULL;
1302 struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
1303 struct ubifs_inode *whiteout_ui = NULL;
1304 int err, release, sync = 0, move = (new_dir != old_dir);
1305 int is_dir = S_ISDIR(old_inode->i_mode);
1306 int unlink = !!new_inode, new_sz, old_sz;
1307 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1309 struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
1310 .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
1311 struct ubifs_budget_req wht_req;
1312 unsigned int saved_nlink;
1313 struct fscrypt_name old_nm, new_nm;
1316 * Budget request settings:
1317 * req: deletion direntry, new direntry, removing the old inode,
1318 * and changing old and new parent directory inodes.
1320 * wht_req: new whiteout inode for RENAME_WHITEOUT.
1322 * ino_req: marks the target inode as dirty and does not write it.
1325 dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
1326 old_dentry, old_inode->i_ino, old_dir->i_ino,
1327 new_dentry, new_dir->i_ino, flags);
1330 ubifs_assert(c, inode_is_locked(new_inode));
1332 /* Budget for old inode's data when its nlink > 1. */
1333 req.dirtied_ino_d = ALIGN(ubifs_inode(new_inode)->data_len, 8);
1334 err = ubifs_purge_xattrs(new_inode);
1339 if (unlink && is_dir) {
1340 err = ubifs_check_dir_empty(new_inode);
1345 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
1349 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
1351 fscrypt_free_filename(&old_nm);
1355 new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
1356 old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
1358 err = ubifs_budget_space(c, &req);
1360 fscrypt_free_filename(&old_nm);
1361 fscrypt_free_filename(&new_nm);
1364 err = ubifs_budget_space(c, &ino_req);
1366 fscrypt_free_filename(&old_nm);
1367 fscrypt_free_filename(&new_nm);
1368 ubifs_release_budget(c, &req);
1372 if (flags & RENAME_WHITEOUT) {
1373 union ubifs_dev_desc *dev = NULL;
1375 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1382 * The whiteout inode without dentry is pinned in memory,
1383 * umount won't happen during rename process because we
1384 * got parent dentry.
1386 whiteout = create_whiteout(old_dir, old_dentry);
1387 if (IS_ERR(whiteout)) {
1388 err = PTR_ERR(whiteout);
1393 whiteout_ui = ubifs_inode(whiteout);
1394 whiteout_ui->data = dev;
1395 whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
1396 ubifs_assert(c, !whiteout_ui->dirty);
1398 memset(&wht_req, 0, sizeof(struct ubifs_budget_req));
1399 wht_req.new_ino = 1;
1400 wht_req.new_ino_d = ALIGN(whiteout_ui->data_len, 8);
1402 * To avoid deadlock between space budget (holds ui_mutex and
1403 * waits wb work) and writeback work(waits ui_mutex), do space
1404 * budget before ubifs inodes locked.
1406 err = ubifs_budget_space(c, &wht_req);
1409 * Whiteout inode can not be written on flash by
1410 * ubifs_jnl_write_inode(), because it's neither
1411 * dirty nor zero-nlink.
1417 /* Add the old_dentry size to the old_dir size. */
1418 old_sz -= CALC_DENT_SIZE(fname_len(&old_nm));
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 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
1429 /* We must adjust parent link count when renaming directories */
1433 * @old_dir loses a link because we are moving
1434 * @old_inode to a different directory.
1436 drop_nlink(old_dir);
1438 * @new_dir only gains a link if we are not also
1439 * overwriting an existing directory.
1445 * @old_inode is not moving to a different directory,
1446 * but @old_dir still loses a link if we are
1447 * overwriting an existing directory.
1450 drop_nlink(old_dir);
1454 old_dir->i_size -= old_sz;
1455 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1458 * And finally, if we unlinked a direntry which happened to have the
1459 * same name as the moved direntry, we have to decrement @i_nlink of
1460 * the unlinked inode.
1464 * Directories cannot have hard-links, so if this is a
1465 * directory, just clear @i_nlink.
1467 saved_nlink = new_inode->i_nlink;
1469 clear_nlink(new_inode);
1471 drop_nlink(new_inode);
1473 new_dir->i_size += new_sz;
1474 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1478 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
1479 * is dirty, because this will be done later on at the end of
1482 if (IS_SYNC(old_inode)) {
1483 sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1484 if (unlink && IS_SYNC(new_inode))
1487 * S_SYNC flag of whiteout inherits from the old_dir, and we
1488 * have already checked the old dir inode. So there is no need
1489 * to check whiteout.
1493 err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
1494 new_inode, &new_nm, whiteout, sync);
1498 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1499 ubifs_release_budget(c, &req);
1502 ubifs_release_budget(c, &wht_req);
1506 mutex_lock(&old_inode_ui->ui_mutex);
1507 release = old_inode_ui->dirty;
1508 mark_inode_dirty_sync(old_inode);
1509 mutex_unlock(&old_inode_ui->ui_mutex);
1512 ubifs_release_budget(c, &ino_req);
1513 if (IS_SYNC(old_inode))
1515 * Rename finished here. Although old inode cannot be updated
1516 * on flash, old ctime is not a big problem, don't return err
1517 * code to userspace.
1519 old_inode->i_sb->s_op->write_inode(old_inode, NULL);
1521 fscrypt_free_filename(&old_nm);
1522 fscrypt_free_filename(&new_nm);
1527 set_nlink(new_inode, saved_nlink);
1529 new_dir->i_size -= new_sz;
1530 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1532 old_dir->i_size += old_sz;
1533 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1538 drop_nlink(new_dir);
1544 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1546 ubifs_release_budget(c, &wht_req);
1550 ubifs_release_budget(c, &ino_req);
1551 ubifs_release_budget(c, &req);
1552 fscrypt_free_filename(&old_nm);
1553 fscrypt_free_filename(&new_nm);
1557 static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
1558 struct inode *new_dir, struct dentry *new_dentry)
1560 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1561 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1563 int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1564 struct inode *fst_inode = d_inode(old_dentry);
1565 struct inode *snd_inode = d_inode(new_dentry);
1567 struct fscrypt_name fst_nm, snd_nm;
1569 ubifs_assert(c, fst_inode && snd_inode);
1572 * Budget request settings: changing two direntries, changing the two
1573 * parent directory inodes.
1576 dbg_gen("dent '%pd' ino %lu in dir ino %lu exchange dent '%pd' ino %lu in dir ino %lu",
1577 old_dentry, fst_inode->i_ino, old_dir->i_ino,
1578 new_dentry, snd_inode->i_ino, new_dir->i_ino);
1580 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
1584 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
1586 fscrypt_free_filename(&fst_nm);
1590 err = ubifs_budget_space(c, &req);
1594 lock_4_inodes(old_dir, new_dir, NULL, NULL);
1596 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
1598 if (old_dir != new_dir) {
1599 if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
1601 drop_nlink(old_dir);
1603 else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
1604 drop_nlink(new_dir);
1609 err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
1610 snd_inode, &snd_nm, sync);
1612 unlock_4_inodes(old_dir, new_dir, NULL, NULL);
1613 ubifs_release_budget(c, &req);
1616 fscrypt_free_filename(&fst_nm);
1617 fscrypt_free_filename(&snd_nm);
1621 static int ubifs_rename(struct mnt_idmap *idmap,
1622 struct inode *old_dir, struct dentry *old_dentry,
1623 struct inode *new_dir, struct dentry *new_dentry,
1627 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1629 if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
1632 ubifs_assert(c, inode_is_locked(old_dir));
1633 ubifs_assert(c, inode_is_locked(new_dir));
1635 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1640 if (flags & RENAME_EXCHANGE)
1641 return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
1643 return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1646 int ubifs_getattr(struct mnt_idmap *idmap, const struct path *path,
1647 struct kstat *stat, u32 request_mask, unsigned int flags)
1650 struct inode *inode = d_inode(path->dentry);
1651 struct ubifs_inode *ui = ubifs_inode(inode);
1653 mutex_lock(&ui->ui_mutex);
1655 if (ui->flags & UBIFS_APPEND_FL)
1656 stat->attributes |= STATX_ATTR_APPEND;
1657 if (ui->flags & UBIFS_COMPR_FL)
1658 stat->attributes |= STATX_ATTR_COMPRESSED;
1659 if (ui->flags & UBIFS_CRYPT_FL)
1660 stat->attributes |= STATX_ATTR_ENCRYPTED;
1661 if (ui->flags & UBIFS_IMMUTABLE_FL)
1662 stat->attributes |= STATX_ATTR_IMMUTABLE;
1664 stat->attributes_mask |= (STATX_ATTR_APPEND |
1665 STATX_ATTR_COMPRESSED |
1666 STATX_ATTR_ENCRYPTED |
1667 STATX_ATTR_IMMUTABLE);
1669 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
1670 stat->blksize = UBIFS_BLOCK_SIZE;
1671 stat->size = ui->ui_size;
1674 * Unfortunately, the 'stat()' system call was designed for block
1675 * device based file systems, and it is not appropriate for UBIFS,
1676 * because UBIFS does not have notion of "block". For example, it is
1677 * difficult to tell how many block a directory takes - it actually
1678 * takes less than 300 bytes, but we have to round it to block size,
1679 * which introduces large mistake. This makes utilities like 'du' to
1680 * report completely senseless numbers. This is the reason why UBIFS
1681 * goes the same way as JFFS2 - it reports zero blocks for everything
1682 * but regular files, which makes more sense than reporting completely
1685 if (S_ISREG(inode->i_mode)) {
1686 size = ui->xattr_size;
1688 size = ALIGN(size, UBIFS_BLOCK_SIZE);
1690 * Note, user-space expects 512-byte blocks count irrespectively
1691 * of what was reported in @stat->size.
1693 stat->blocks = size >> 9;
1696 mutex_unlock(&ui->ui_mutex);
1700 const struct inode_operations ubifs_dir_inode_operations = {
1701 .lookup = ubifs_lookup,
1702 .create = ubifs_create,
1704 .symlink = ubifs_symlink,
1705 .unlink = ubifs_unlink,
1706 .mkdir = ubifs_mkdir,
1707 .rmdir = ubifs_rmdir,
1708 .mknod = ubifs_mknod,
1709 .rename = ubifs_rename,
1710 .setattr = ubifs_setattr,
1711 .getattr = ubifs_getattr,
1712 .listxattr = ubifs_listxattr,
1713 .update_time = ubifs_update_time,
1714 .tmpfile = ubifs_tmpfile,
1715 .fileattr_get = ubifs_fileattr_get,
1716 .fileattr_set = ubifs_fileattr_set,
1719 const struct file_operations ubifs_dir_operations = {
1720 .llseek = generic_file_llseek,
1721 .release = ubifs_dir_release,
1722 .read = generic_read_dir,
1723 .iterate_shared = ubifs_readdir,
1724 .fsync = ubifs_fsync,
1725 .unlocked_ioctl = ubifs_ioctl,
1726 #ifdef CONFIG_COMPAT
1727 .compat_ioctl = ubifs_compat_ioctl,