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 inode->i_mtime = inode->i_atime = inode_set_ctime_current(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);
208 generic_set_encrypted_ci_d_ops(dentry);
210 return d_splice_alias(NULL, dentry);
214 if (fname_len(&nm) > UBIFS_MAX_NLEN) {
215 inode = ERR_PTR(-ENAMETOOLONG);
219 dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
221 inode = ERR_PTR(-ENOMEM);
225 if (fname_name(&nm) == NULL) {
226 if (nm.hash & ~UBIFS_S_KEY_HASH_MASK)
227 goto done; /* ENOENT */
228 dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
229 err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
231 dent_key_init(c, &key, dir->i_ino, &nm);
232 err = ubifs_tnc_lookup_nm(c, &key, dent, &nm);
237 dbg_gen("not found");
239 inode = ERR_PTR(err);
243 if (dbg_check_name(c, dent, &nm)) {
244 inode = ERR_PTR(-EINVAL);
248 inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
251 * This should not happen. Probably the file-system needs
254 err = PTR_ERR(inode);
255 ubifs_err(c, "dead directory entry '%pd', error %d",
257 ubifs_ro_mode(c, err);
261 if (IS_ENCRYPTED(dir) &&
262 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
263 !fscrypt_has_permitted_context(dir, inode)) {
264 ubifs_warn(c, "Inconsistent encryption contexts: %lu/%lu",
265 dir->i_ino, inode->i_ino);
267 inode = ERR_PTR(-EPERM);
272 fscrypt_free_filename(&nm);
273 return d_splice_alias(inode, dentry);
276 static int ubifs_prepare_create(struct inode *dir, struct dentry *dentry,
277 struct fscrypt_name *nm)
279 if (fscrypt_is_nokey_name(dentry))
282 return fscrypt_setup_filename(dir, &dentry->d_name, 0, nm);
285 static int ubifs_create(struct mnt_idmap *idmap, struct inode *dir,
286 struct dentry *dentry, umode_t mode, bool excl)
289 struct ubifs_info *c = dir->i_sb->s_fs_info;
290 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
292 struct ubifs_inode *dir_ui = ubifs_inode(dir);
293 struct fscrypt_name nm;
297 * Budget request settings: new inode, new direntry, changing the
298 * parent directory inode.
301 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
302 dentry, mode, dir->i_ino);
304 err = ubifs_budget_space(c, &req);
308 err = ubifs_prepare_create(dir, dentry, &nm);
312 sz_change = CALC_DENT_SIZE(fname_len(&nm));
314 inode = ubifs_new_inode(c, dir, mode, false);
316 err = PTR_ERR(inode);
320 err = ubifs_init_security(dir, inode, &dentry->d_name);
324 mutex_lock(&dir_ui->ui_mutex);
325 dir->i_size += sz_change;
326 dir_ui->ui_size = dir->i_size;
327 dir->i_mtime = 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);
727 int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
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 err = dbg_check_synced_i_size(c, inode);
755 err = ubifs_budget_space(c, &req);
759 lock_2_inodes(dir, inode);
761 /* Handle O_TMPFILE corner case, it is allowed to link a O_TMPFILE. */
762 if (inode->i_nlink == 0)
763 ubifs_delete_orphan(c, inode->i_ino);
767 inode_set_ctime_current(inode);
768 dir->i_size += sz_change;
769 dir_ui->ui_size = dir->i_size;
770 dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
771 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
774 unlock_2_inodes(dir, inode);
776 ubifs_release_budget(c, &req);
777 d_instantiate(dentry, inode);
778 fscrypt_free_filename(&nm);
782 dir->i_size -= sz_change;
783 dir_ui->ui_size = dir->i_size;
785 if (inode->i_nlink == 0)
786 ubifs_add_orphan(c, inode->i_ino);
787 unlock_2_inodes(dir, inode);
788 ubifs_release_budget(c, &req);
791 fscrypt_free_filename(&nm);
795 static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
797 struct ubifs_info *c = dir->i_sb->s_fs_info;
798 struct inode *inode = d_inode(dentry);
799 struct ubifs_inode *dir_ui = ubifs_inode(dir);
800 int err, sz_change, budgeted = 1;
801 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
802 unsigned int saved_nlink = inode->i_nlink;
803 struct fscrypt_name nm;
806 * Budget request settings: deletion direntry, deletion inode (+1 for
807 * @dirtied_ino), changing the parent directory inode. If budgeting
808 * fails, go ahead anyway because we have extra space reserved for
812 dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
813 dentry, inode->i_ino,
814 inode->i_nlink, dir->i_ino);
816 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
820 err = ubifs_purge_xattrs(inode);
824 sz_change = CALC_DENT_SIZE(fname_len(&nm));
826 ubifs_assert(c, inode_is_locked(dir));
827 ubifs_assert(c, inode_is_locked(inode));
828 err = dbg_check_synced_i_size(c, inode);
832 err = ubifs_budget_space(c, &req);
839 lock_2_inodes(dir, inode);
840 inode_set_ctime_current(inode);
842 dir->i_size -= sz_change;
843 dir_ui->ui_size = dir->i_size;
844 dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
845 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
848 unlock_2_inodes(dir, inode);
851 ubifs_release_budget(c, &req);
853 /* We've deleted something - clean the "no space" flags */
854 c->bi.nospace = c->bi.nospace_rp = 0;
857 fscrypt_free_filename(&nm);
861 dir->i_size += sz_change;
862 dir_ui->ui_size = dir->i_size;
863 set_nlink(inode, saved_nlink);
864 unlock_2_inodes(dir, inode);
866 ubifs_release_budget(c, &req);
868 fscrypt_free_filename(&nm);
873 * ubifs_check_dir_empty - check if a directory is empty or not.
874 * @dir: VFS inode object of the directory to check
876 * This function checks if directory @dir is empty. Returns zero if the
877 * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
880 int ubifs_check_dir_empty(struct inode *dir)
882 struct ubifs_info *c = dir->i_sb->s_fs_info;
883 struct fscrypt_name nm = { 0 };
884 struct ubifs_dent_node *dent;
888 lowest_dent_key(c, &key, dir->i_ino);
889 dent = ubifs_tnc_next_ent(c, &key, &nm);
901 static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
903 struct ubifs_info *c = dir->i_sb->s_fs_info;
904 struct inode *inode = d_inode(dentry);
905 int err, sz_change, budgeted = 1;
906 struct ubifs_inode *dir_ui = ubifs_inode(dir);
907 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
908 struct fscrypt_name nm;
911 * Budget request settings: deletion direntry, deletion inode and
912 * changing the parent inode. If budgeting fails, go ahead anyway
913 * because we have extra space reserved for deletions.
916 dbg_gen("directory '%pd', ino %lu in dir ino %lu", dentry,
917 inode->i_ino, dir->i_ino);
918 ubifs_assert(c, inode_is_locked(dir));
919 ubifs_assert(c, inode_is_locked(inode));
920 err = ubifs_check_dir_empty(d_inode(dentry));
924 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
928 err = ubifs_purge_xattrs(inode);
932 sz_change = CALC_DENT_SIZE(fname_len(&nm));
934 err = ubifs_budget_space(c, &req);
941 lock_2_inodes(dir, inode);
942 inode_set_ctime_current(inode);
945 dir->i_size -= sz_change;
946 dir_ui->ui_size = dir->i_size;
947 dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
948 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
951 unlock_2_inodes(dir, inode);
954 ubifs_release_budget(c, &req);
956 /* We've deleted something - clean the "no space" flags */
957 c->bi.nospace = c->bi.nospace_rp = 0;
960 fscrypt_free_filename(&nm);
964 dir->i_size += sz_change;
965 dir_ui->ui_size = dir->i_size;
968 unlock_2_inodes(dir, inode);
970 ubifs_release_budget(c, &req);
972 fscrypt_free_filename(&nm);
976 static int ubifs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
977 struct dentry *dentry, umode_t mode)
980 struct ubifs_inode *dir_ui = ubifs_inode(dir);
981 struct ubifs_info *c = dir->i_sb->s_fs_info;
983 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
985 struct fscrypt_name nm;
988 * Budget request settings: new inode, new direntry and changing parent
992 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
993 dentry, mode, dir->i_ino);
995 err = ubifs_budget_space(c, &req);
999 err = ubifs_prepare_create(dir, dentry, &nm);
1003 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1005 inode = ubifs_new_inode(c, dir, S_IFDIR | mode, false);
1006 if (IS_ERR(inode)) {
1007 err = PTR_ERR(inode);
1011 err = ubifs_init_security(dir, inode, &dentry->d_name);
1015 mutex_lock(&dir_ui->ui_mutex);
1016 insert_inode_hash(inode);
1019 dir->i_size += sz_change;
1020 dir_ui->ui_size = dir->i_size;
1021 dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
1022 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1024 ubifs_err(c, "cannot create directory, error %d", err);
1027 mutex_unlock(&dir_ui->ui_mutex);
1029 ubifs_release_budget(c, &req);
1030 d_instantiate(dentry, inode);
1031 fscrypt_free_filename(&nm);
1035 dir->i_size -= sz_change;
1036 dir_ui->ui_size = dir->i_size;
1038 mutex_unlock(&dir_ui->ui_mutex);
1040 make_bad_inode(inode);
1043 fscrypt_free_filename(&nm);
1045 ubifs_release_budget(c, &req);
1049 static int ubifs_mknod(struct mnt_idmap *idmap, struct inode *dir,
1050 struct dentry *dentry, umode_t mode, dev_t rdev)
1052 struct inode *inode;
1053 struct ubifs_inode *ui;
1054 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1055 struct ubifs_info *c = dir->i_sb->s_fs_info;
1056 union ubifs_dev_desc *dev = NULL;
1058 int err, devlen = 0;
1059 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1061 struct fscrypt_name nm;
1064 * Budget request settings: new inode, new direntry and changing parent
1068 dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
1070 if (S_ISBLK(mode) || S_ISCHR(mode)) {
1071 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1074 devlen = ubifs_encode_dev(dev, rdev);
1077 req.new_ino_d = ALIGN(devlen, 8);
1078 err = ubifs_budget_space(c, &req);
1084 err = ubifs_prepare_create(dir, dentry, &nm);
1090 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1092 inode = ubifs_new_inode(c, dir, mode, false);
1093 if (IS_ERR(inode)) {
1095 err = PTR_ERR(inode);
1099 init_special_inode(inode, inode->i_mode, rdev);
1100 inode->i_size = ubifs_inode(inode)->ui_size = devlen;
1101 ui = ubifs_inode(inode);
1103 ui->data_len = devlen;
1105 err = ubifs_init_security(dir, inode, &dentry->d_name);
1109 mutex_lock(&dir_ui->ui_mutex);
1110 dir->i_size += sz_change;
1111 dir_ui->ui_size = dir->i_size;
1112 dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
1113 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1116 mutex_unlock(&dir_ui->ui_mutex);
1118 ubifs_release_budget(c, &req);
1119 insert_inode_hash(inode);
1120 d_instantiate(dentry, inode);
1121 fscrypt_free_filename(&nm);
1125 dir->i_size -= sz_change;
1126 dir_ui->ui_size = dir->i_size;
1127 mutex_unlock(&dir_ui->ui_mutex);
1129 make_bad_inode(inode);
1132 fscrypt_free_filename(&nm);
1134 ubifs_release_budget(c, &req);
1138 static int ubifs_symlink(struct mnt_idmap *idmap, struct inode *dir,
1139 struct dentry *dentry, const char *symname)
1141 struct inode *inode;
1142 struct ubifs_inode *ui;
1143 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1144 struct ubifs_info *c = dir->i_sb->s_fs_info;
1145 int err, sz_change, len = strlen(symname);
1146 struct fscrypt_str disk_link;
1147 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1149 struct fscrypt_name nm;
1151 dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
1152 symname, dir->i_ino);
1154 err = fscrypt_prepare_symlink(dir, symname, len, UBIFS_MAX_INO_DATA,
1160 * Budget request settings: new inode, new direntry and changing parent
1163 req.new_ino_d = ALIGN(disk_link.len - 1, 8);
1164 err = ubifs_budget_space(c, &req);
1168 err = ubifs_prepare_create(dir, dentry, &nm);
1172 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1174 inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO, false);
1175 if (IS_ERR(inode)) {
1176 err = PTR_ERR(inode);
1180 ui = ubifs_inode(inode);
1181 ui->data = kmalloc(disk_link.len, GFP_NOFS);
1187 if (IS_ENCRYPTED(inode)) {
1188 disk_link.name = ui->data; /* encrypt directly into ui->data */
1189 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
1193 memcpy(ui->data, disk_link.name, disk_link.len);
1194 inode->i_link = ui->data;
1198 * The terminating zero byte is not written to the flash media and it
1199 * is put just to make later in-memory string processing simpler. Thus,
1200 * data length is @disk_link.len - 1, not @disk_link.len.
1202 ui->data_len = disk_link.len - 1;
1203 inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
1205 err = ubifs_init_security(dir, inode, &dentry->d_name);
1209 mutex_lock(&dir_ui->ui_mutex);
1210 dir->i_size += sz_change;
1211 dir_ui->ui_size = dir->i_size;
1212 dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
1213 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1216 mutex_unlock(&dir_ui->ui_mutex);
1218 insert_inode_hash(inode);
1219 d_instantiate(dentry, inode);
1224 dir->i_size -= sz_change;
1225 dir_ui->ui_size = dir->i_size;
1226 mutex_unlock(&dir_ui->ui_mutex);
1228 /* Free inode->i_link before inode is marked as bad. */
1229 fscrypt_free_inode(inode);
1230 make_bad_inode(inode);
1233 fscrypt_free_filename(&nm);
1235 ubifs_release_budget(c, &req);
1240 * lock_4_inodes - a wrapper for locking three UBIFS inodes.
1241 * @inode1: first inode
1242 * @inode2: second inode
1243 * @inode3: third inode
1244 * @inode4: fourth inode
1246 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
1247 * @inode2 whereas @inode3 and @inode4 may be %NULL.
1249 * We do not implement any tricks to guarantee strict lock ordering, because
1250 * VFS has already done it for us on the @i_mutex. So this is just a simple
1253 static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
1254 struct inode *inode3, struct inode *inode4)
1256 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
1257 if (inode2 != inode1)
1258 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
1260 mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
1262 mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
1266 * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
1267 * @inode1: first inode
1268 * @inode2: second inode
1269 * @inode3: third inode
1270 * @inode4: fourth inode
1272 static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
1273 struct inode *inode3, struct inode *inode4)
1276 mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
1278 mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
1279 if (inode1 != inode2)
1280 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
1281 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
1284 static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
1285 struct inode *new_dir, struct dentry *new_dentry,
1288 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1289 struct inode *old_inode = d_inode(old_dentry);
1290 struct inode *new_inode = d_inode(new_dentry);
1291 struct inode *whiteout = NULL;
1292 struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
1293 struct ubifs_inode *whiteout_ui = NULL;
1294 int err, release, sync = 0, move = (new_dir != old_dir);
1295 int is_dir = S_ISDIR(old_inode->i_mode);
1296 int unlink = !!new_inode, new_sz, old_sz;
1297 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1299 struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
1300 .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
1301 struct ubifs_budget_req wht_req;
1302 unsigned int saved_nlink;
1303 struct fscrypt_name old_nm, new_nm;
1306 * Budget request settings:
1307 * req: deletion direntry, new direntry, removing the old inode,
1308 * and changing old and new parent directory inodes.
1310 * wht_req: new whiteout inode for RENAME_WHITEOUT.
1312 * ino_req: marks the target inode as dirty and does not write it.
1315 dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
1316 old_dentry, old_inode->i_ino, old_dir->i_ino,
1317 new_dentry, new_dir->i_ino, flags);
1320 ubifs_assert(c, inode_is_locked(new_inode));
1322 /* Budget for old inode's data when its nlink > 1. */
1323 req.dirtied_ino_d = ALIGN(ubifs_inode(new_inode)->data_len, 8);
1324 err = ubifs_purge_xattrs(new_inode);
1329 if (unlink && is_dir) {
1330 err = ubifs_check_dir_empty(new_inode);
1335 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
1339 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
1341 fscrypt_free_filename(&old_nm);
1345 new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
1346 old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
1348 err = ubifs_budget_space(c, &req);
1350 fscrypt_free_filename(&old_nm);
1351 fscrypt_free_filename(&new_nm);
1354 err = ubifs_budget_space(c, &ino_req);
1356 fscrypt_free_filename(&old_nm);
1357 fscrypt_free_filename(&new_nm);
1358 ubifs_release_budget(c, &req);
1362 if (flags & RENAME_WHITEOUT) {
1363 union ubifs_dev_desc *dev = NULL;
1365 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1372 * The whiteout inode without dentry is pinned in memory,
1373 * umount won't happen during rename process because we
1374 * got parent dentry.
1376 whiteout = create_whiteout(old_dir, old_dentry);
1377 if (IS_ERR(whiteout)) {
1378 err = PTR_ERR(whiteout);
1383 whiteout_ui = ubifs_inode(whiteout);
1384 whiteout_ui->data = dev;
1385 whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
1386 ubifs_assert(c, !whiteout_ui->dirty);
1388 memset(&wht_req, 0, sizeof(struct ubifs_budget_req));
1389 wht_req.new_ino = 1;
1390 wht_req.new_ino_d = ALIGN(whiteout_ui->data_len, 8);
1392 * To avoid deadlock between space budget (holds ui_mutex and
1393 * waits wb work) and writeback work(waits ui_mutex), do space
1394 * budget before ubifs inodes locked.
1396 err = ubifs_budget_space(c, &wht_req);
1399 * Whiteout inode can not be written on flash by
1400 * ubifs_jnl_write_inode(), because it's neither
1401 * dirty nor zero-nlink.
1407 /* Add the old_dentry size to the old_dir size. */
1408 old_sz -= CALC_DENT_SIZE(fname_len(&old_nm));
1411 lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1414 * Like most other Unix systems, set the @i_ctime for inodes on a
1417 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
1419 /* We must adjust parent link count when renaming directories */
1423 * @old_dir loses a link because we are moving
1424 * @old_inode to a different directory.
1426 drop_nlink(old_dir);
1428 * @new_dir only gains a link if we are not also
1429 * overwriting an existing directory.
1435 * @old_inode is not moving to a different directory,
1436 * but @old_dir still loses a link if we are
1437 * overwriting an existing directory.
1440 drop_nlink(old_dir);
1444 old_dir->i_size -= old_sz;
1445 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1448 * And finally, if we unlinked a direntry which happened to have the
1449 * same name as the moved direntry, we have to decrement @i_nlink of
1450 * the unlinked inode.
1454 * Directories cannot have hard-links, so if this is a
1455 * directory, just clear @i_nlink.
1457 saved_nlink = new_inode->i_nlink;
1459 clear_nlink(new_inode);
1461 drop_nlink(new_inode);
1463 new_dir->i_size += new_sz;
1464 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1468 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
1469 * is dirty, because this will be done later on at the end of
1472 if (IS_SYNC(old_inode)) {
1473 sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1474 if (unlink && IS_SYNC(new_inode))
1477 * S_SYNC flag of whiteout inherits from the old_dir, and we
1478 * have already checked the old dir inode. So there is no need
1479 * to check whiteout.
1483 err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
1484 new_inode, &new_nm, whiteout, sync);
1488 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1489 ubifs_release_budget(c, &req);
1492 ubifs_release_budget(c, &wht_req);
1496 mutex_lock(&old_inode_ui->ui_mutex);
1497 release = old_inode_ui->dirty;
1498 mark_inode_dirty_sync(old_inode);
1499 mutex_unlock(&old_inode_ui->ui_mutex);
1502 ubifs_release_budget(c, &ino_req);
1503 if (IS_SYNC(old_inode))
1505 * Rename finished here. Although old inode cannot be updated
1506 * on flash, old ctime is not a big problem, don't return err
1507 * code to userspace.
1509 old_inode->i_sb->s_op->write_inode(old_inode, NULL);
1511 fscrypt_free_filename(&old_nm);
1512 fscrypt_free_filename(&new_nm);
1517 set_nlink(new_inode, saved_nlink);
1519 new_dir->i_size -= new_sz;
1520 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1522 old_dir->i_size += old_sz;
1523 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1528 drop_nlink(new_dir);
1534 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1536 ubifs_release_budget(c, &wht_req);
1540 ubifs_release_budget(c, &ino_req);
1541 ubifs_release_budget(c, &req);
1542 fscrypt_free_filename(&old_nm);
1543 fscrypt_free_filename(&new_nm);
1547 static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
1548 struct inode *new_dir, struct dentry *new_dentry)
1550 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1551 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1553 int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1554 struct inode *fst_inode = d_inode(old_dentry);
1555 struct inode *snd_inode = d_inode(new_dentry);
1557 struct fscrypt_name fst_nm, snd_nm;
1559 ubifs_assert(c, fst_inode && snd_inode);
1562 * Budget request settings: changing two direntries, changing the two
1563 * parent directory inodes.
1566 dbg_gen("dent '%pd' ino %lu in dir ino %lu exchange dent '%pd' ino %lu in dir ino %lu",
1567 old_dentry, fst_inode->i_ino, old_dir->i_ino,
1568 new_dentry, snd_inode->i_ino, new_dir->i_ino);
1570 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
1574 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &snd_nm);
1576 fscrypt_free_filename(&fst_nm);
1580 err = ubifs_budget_space(c, &req);
1584 lock_4_inodes(old_dir, new_dir, NULL, NULL);
1586 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
1588 if (old_dir != new_dir) {
1589 if (S_ISDIR(fst_inode->i_mode) && !S_ISDIR(snd_inode->i_mode)) {
1591 drop_nlink(old_dir);
1593 else if (!S_ISDIR(fst_inode->i_mode) && S_ISDIR(snd_inode->i_mode)) {
1594 drop_nlink(new_dir);
1599 err = ubifs_jnl_xrename(c, old_dir, fst_inode, &fst_nm, new_dir,
1600 snd_inode, &snd_nm, sync);
1602 unlock_4_inodes(old_dir, new_dir, NULL, NULL);
1603 ubifs_release_budget(c, &req);
1606 fscrypt_free_filename(&fst_nm);
1607 fscrypt_free_filename(&snd_nm);
1611 static int ubifs_rename(struct mnt_idmap *idmap,
1612 struct inode *old_dir, struct dentry *old_dentry,
1613 struct inode *new_dir, struct dentry *new_dentry,
1617 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1619 if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
1622 ubifs_assert(c, inode_is_locked(old_dir));
1623 ubifs_assert(c, inode_is_locked(new_dir));
1625 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1630 if (flags & RENAME_EXCHANGE)
1631 return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
1633 return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1636 int ubifs_getattr(struct mnt_idmap *idmap, const struct path *path,
1637 struct kstat *stat, u32 request_mask, unsigned int flags)
1640 struct inode *inode = d_inode(path->dentry);
1641 struct ubifs_inode *ui = ubifs_inode(inode);
1643 mutex_lock(&ui->ui_mutex);
1645 if (ui->flags & UBIFS_APPEND_FL)
1646 stat->attributes |= STATX_ATTR_APPEND;
1647 if (ui->flags & UBIFS_COMPR_FL)
1648 stat->attributes |= STATX_ATTR_COMPRESSED;
1649 if (ui->flags & UBIFS_CRYPT_FL)
1650 stat->attributes |= STATX_ATTR_ENCRYPTED;
1651 if (ui->flags & UBIFS_IMMUTABLE_FL)
1652 stat->attributes |= STATX_ATTR_IMMUTABLE;
1654 stat->attributes_mask |= (STATX_ATTR_APPEND |
1655 STATX_ATTR_COMPRESSED |
1656 STATX_ATTR_ENCRYPTED |
1657 STATX_ATTR_IMMUTABLE);
1659 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
1660 stat->blksize = UBIFS_BLOCK_SIZE;
1661 stat->size = ui->ui_size;
1664 * Unfortunately, the 'stat()' system call was designed for block
1665 * device based file systems, and it is not appropriate for UBIFS,
1666 * because UBIFS does not have notion of "block". For example, it is
1667 * difficult to tell how many block a directory takes - it actually
1668 * takes less than 300 bytes, but we have to round it to block size,
1669 * which introduces large mistake. This makes utilities like 'du' to
1670 * report completely senseless numbers. This is the reason why UBIFS
1671 * goes the same way as JFFS2 - it reports zero blocks for everything
1672 * but regular files, which makes more sense than reporting completely
1675 if (S_ISREG(inode->i_mode)) {
1676 size = ui->xattr_size;
1678 size = ALIGN(size, UBIFS_BLOCK_SIZE);
1680 * Note, user-space expects 512-byte blocks count irrespectively
1681 * of what was reported in @stat->size.
1683 stat->blocks = size >> 9;
1686 mutex_unlock(&ui->ui_mutex);
1690 const struct inode_operations ubifs_dir_inode_operations = {
1691 .lookup = ubifs_lookup,
1692 .create = ubifs_create,
1694 .symlink = ubifs_symlink,
1695 .unlink = ubifs_unlink,
1696 .mkdir = ubifs_mkdir,
1697 .rmdir = ubifs_rmdir,
1698 .mknod = ubifs_mknod,
1699 .rename = ubifs_rename,
1700 .setattr = ubifs_setattr,
1701 .getattr = ubifs_getattr,
1702 .listxattr = ubifs_listxattr,
1703 .update_time = ubifs_update_time,
1704 .tmpfile = ubifs_tmpfile,
1705 .fileattr_get = ubifs_fileattr_get,
1706 .fileattr_set = ubifs_fileattr_set,
1709 const struct file_operations ubifs_dir_operations = {
1710 .llseek = generic_file_llseek,
1711 .release = ubifs_dir_release,
1712 .read = generic_read_dir,
1713 .iterate_shared = ubifs_readdir,
1714 .fsync = ubifs_fsync,
1715 .unlocked_ioctl = ubifs_ioctl,
1716 #ifdef CONFIG_COMPAT
1717 .compat_ioctl = ubifs_compat_ioctl,