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);
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 inode_set_mtime_to_ts(dir,
328 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
329 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
332 mutex_unlock(&dir_ui->ui_mutex);
334 ubifs_release_budget(c, &req);
335 fscrypt_free_filename(&nm);
336 insert_inode_hash(inode);
337 d_instantiate(dentry, inode);
341 dir->i_size -= sz_change;
342 dir_ui->ui_size = dir->i_size;
343 mutex_unlock(&dir_ui->ui_mutex);
345 make_bad_inode(inode);
348 fscrypt_free_filename(&nm);
350 ubifs_release_budget(c, &req);
351 ubifs_err(c, "cannot create regular file, error %d", err);
355 static struct inode *create_whiteout(struct inode *dir, struct dentry *dentry)
358 umode_t mode = S_IFCHR | WHITEOUT_MODE;
360 struct ubifs_info *c = dir->i_sb->s_fs_info;
363 * Create an inode('nlink = 1') for whiteout without updating journal,
364 * let ubifs_jnl_rename() store it on flash to complete rename whiteout
368 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
369 dentry, mode, dir->i_ino);
371 inode = ubifs_new_inode(c, dir, mode, false);
373 err = PTR_ERR(inode);
377 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
378 ubifs_assert(c, inode->i_op == &ubifs_file_inode_operations);
380 err = ubifs_init_security(dir, inode, &dentry->d_name);
384 /* The dir size is updated by do_rename. */
385 insert_inode_hash(inode);
390 make_bad_inode(inode);
393 ubifs_err(c, "cannot create whiteout file, error %d", err);
398 * lock_2_inodes - a wrapper for locking two UBIFS inodes.
399 * @inode1: first inode
400 * @inode2: second inode
402 * We do not implement any tricks to guarantee strict lock ordering, because
403 * VFS has already done it for us on the @i_mutex. So this is just a simple
406 static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
408 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
409 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
413 * unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
414 * @inode1: first inode
415 * @inode2: second inode
417 static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
419 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
420 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
423 static int ubifs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
424 struct file *file, umode_t mode)
426 struct dentry *dentry = file->f_path.dentry;
428 struct ubifs_info *c = dir->i_sb->s_fs_info;
429 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
431 struct ubifs_budget_req ino_req = { .dirtied_ino = 1 };
432 struct ubifs_inode *ui;
433 int err, instantiated = 0;
434 struct fscrypt_name nm;
437 * Budget request settings: new inode, new direntry, changing the
438 * parent directory inode.
439 * Allocate budget separately for new dirtied inode, the budget will
440 * be released via writeback.
443 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
444 dentry, mode, dir->i_ino);
446 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
450 err = ubifs_budget_space(c, &req);
452 fscrypt_free_filename(&nm);
456 err = ubifs_budget_space(c, &ino_req);
458 ubifs_release_budget(c, &req);
459 fscrypt_free_filename(&nm);
463 inode = ubifs_new_inode(c, dir, mode, false);
465 err = PTR_ERR(inode);
468 ui = ubifs_inode(inode);
470 err = ubifs_init_security(dir, inode, &dentry->d_name);
474 mutex_lock(&ui->ui_mutex);
475 insert_inode_hash(inode);
476 d_tmpfile(file, inode);
477 ubifs_assert(c, ui->dirty);
480 mutex_unlock(&ui->ui_mutex);
482 lock_2_inodes(dir, inode);
483 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
486 unlock_2_inodes(dir, inode);
488 ubifs_release_budget(c, &req);
489 fscrypt_free_filename(&nm);
491 return finish_open_simple(file, 0);
494 unlock_2_inodes(dir, inode);
496 make_bad_inode(inode);
500 ubifs_release_budget(c, &req);
502 ubifs_release_budget(c, &ino_req);
503 fscrypt_free_filename(&nm);
504 ubifs_err(c, "cannot create temporary file, error %d", err);
509 * vfs_dent_type - get VFS directory entry type.
510 * @type: UBIFS directory entry type
512 * This function converts UBIFS directory entry type into VFS directory entry
515 static unsigned int vfs_dent_type(uint8_t type)
518 case UBIFS_ITYPE_REG:
520 case UBIFS_ITYPE_DIR:
522 case UBIFS_ITYPE_LNK:
524 case UBIFS_ITYPE_BLK:
526 case UBIFS_ITYPE_CHR:
528 case UBIFS_ITYPE_FIFO:
530 case UBIFS_ITYPE_SOCK:
539 * The classical Unix view for directory is that it is a linear array of
540 * (name, inode number) entries. Linux/VFS assumes this model as well.
541 * Particularly, 'readdir()' call wants us to return a directory entry offset
542 * which later may be used to continue 'readdir()'ing the directory or to
543 * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
544 * model because directory entries are identified by keys, which may collide.
546 * UBIFS uses directory entry hash value for directory offsets, so
547 * 'seekdir()'/'telldir()' may not always work because of possible key
548 * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
549 * properly by means of saving full directory entry name in the private field
550 * of the file description object.
552 * This means that UBIFS cannot support NFS which requires full
553 * 'seekdir()'/'telldir()' support.
555 static int ubifs_readdir(struct file *file, struct dir_context *ctx)
557 int fstr_real_len = 0, err = 0;
558 struct fscrypt_name nm;
559 struct fscrypt_str fstr = {0};
561 struct ubifs_dent_node *dent;
562 struct inode *dir = file_inode(file);
563 struct ubifs_info *c = dir->i_sb->s_fs_info;
564 bool encrypted = IS_ENCRYPTED(dir);
566 dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
568 if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
570 * The directory was seek'ed to a senseless position or there
571 * are no more entries.
576 err = fscrypt_prepare_readdir(dir);
580 err = fscrypt_fname_alloc_buffer(UBIFS_MAX_NLEN, &fstr);
584 fstr_real_len = fstr.len;
587 if (file->f_version == 0) {
589 * The file was seek'ed, which means that @file->private_data
590 * is now invalid. This may also be just the first
591 * 'ubifs_readdir()' invocation, in which case
592 * @file->private_data is NULL, and the below code is
595 kfree(file->private_data);
596 file->private_data = NULL;
600 * 'generic_file_llseek()' unconditionally sets @file->f_version to
601 * zero, and we use this for detecting whether the file was seek'ed.
605 /* File positions 0 and 1 correspond to "." and ".." */
607 ubifs_assert(c, !file->private_data);
608 if (!dir_emit_dots(file, ctx)) {
610 fscrypt_fname_free_buffer(&fstr);
614 /* Find the first entry in TNC and save it */
615 lowest_dent_key(c, &key, dir->i_ino);
617 dent = ubifs_tnc_next_ent(c, &key, &nm);
623 ctx->pos = key_hash_flash(c, &dent->key);
624 file->private_data = dent;
627 dent = file->private_data;
630 * The directory was seek'ed to and is now readdir'ed.
631 * Find the entry corresponding to @ctx->pos or the closest one.
633 dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
635 dent = ubifs_tnc_next_ent(c, &key, &nm);
640 ctx->pos = key_hash_flash(c, &dent->key);
641 file->private_data = dent;
645 dbg_gen("ino %llu, new f_pos %#x",
646 (unsigned long long)le64_to_cpu(dent->inum),
647 key_hash_flash(c, &dent->key));
648 ubifs_assert(c, le64_to_cpu(dent->ch.sqnum) >
649 ubifs_inode(dir)->creat_sqnum);
651 fname_len(&nm) = le16_to_cpu(dent->nlen);
652 fname_name(&nm) = dent->name;
655 fstr.len = fstr_real_len;
657 err = fscrypt_fname_disk_to_usr(dir, key_hash_flash(c,
659 le32_to_cpu(dent->cookie),
660 &nm.disk_name, &fstr);
664 fstr.len = fname_len(&nm);
665 fstr.name = fname_name(&nm);
668 if (!dir_emit(ctx, fstr.name, fstr.len,
669 le64_to_cpu(dent->inum),
670 vfs_dent_type(dent->type))) {
672 fscrypt_fname_free_buffer(&fstr);
676 /* Switch to the next entry */
677 key_read(c, &dent->key, &key);
678 dent = ubifs_tnc_next_ent(c, &key, &nm);
684 kfree(file->private_data);
685 ctx->pos = key_hash_flash(c, &dent->key);
686 file->private_data = dent;
691 kfree(file->private_data);
692 file->private_data = NULL;
695 fscrypt_fname_free_buffer(&fstr);
698 ubifs_err(c, "cannot find next direntry, error %d", err);
701 * -ENOENT is a non-fatal error in this context, the TNC uses
702 * it to indicate that the cursor moved past the current directory
703 * and readdir() has to stop.
708 /* 2 is a special value indicating that there are no more direntries */
713 /* Free saved readdir() state when the directory is closed */
714 static int ubifs_dir_release(struct inode *dir, struct file *file)
716 kfree(file->private_data);
717 file->private_data = NULL;
721 static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
722 struct dentry *dentry)
724 struct ubifs_info *c = dir->i_sb->s_fs_info;
725 struct inode *inode = d_inode(old_dentry);
726 struct ubifs_inode *ui = ubifs_inode(inode);
727 struct ubifs_inode *dir_ui = ubifs_inode(dir);
729 struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
730 .dirtied_ino_d = ALIGN(ui->data_len, 8) };
731 struct fscrypt_name nm;
734 * Budget request settings: new direntry, changing the target inode,
735 * changing the parent inode.
738 dbg_gen("dent '%pd' to ino %lu (nlink %d) in dir ino %lu",
739 dentry, inode->i_ino,
740 inode->i_nlink, dir->i_ino);
741 ubifs_assert(c, inode_is_locked(dir));
742 ubifs_assert(c, inode_is_locked(inode));
744 err = fscrypt_prepare_link(old_dentry, dir, dentry);
748 err = fscrypt_setup_filename(dir, &dentry->d_name, 0, &nm);
752 sz_change = CALC_DENT_SIZE(fname_len(&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_set_ctime_current(inode);
771 dir->i_size += sz_change;
772 dir_ui->ui_size = dir->i_size;
773 inode_set_mtime_to_ts(dir,
774 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
775 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
778 unlock_2_inodes(dir, inode);
780 ubifs_release_budget(c, &req);
781 d_instantiate(dentry, inode);
782 fscrypt_free_filename(&nm);
786 dir->i_size -= sz_change;
787 dir_ui->ui_size = dir->i_size;
789 if (inode->i_nlink == 0)
790 ubifs_add_orphan(c, inode->i_ino);
791 unlock_2_inodes(dir, inode);
792 ubifs_release_budget(c, &req);
795 fscrypt_free_filename(&nm);
799 static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
801 struct ubifs_info *c = dir->i_sb->s_fs_info;
802 struct inode *inode = d_inode(dentry);
803 struct ubifs_inode *dir_ui = ubifs_inode(dir);
804 int err, sz_change, budgeted = 1;
805 struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
806 unsigned int saved_nlink = inode->i_nlink;
807 struct fscrypt_name nm;
810 * Budget request settings: deletion direntry, deletion inode (+1 for
811 * @dirtied_ino), changing the parent directory inode. If budgeting
812 * fails, go ahead anyway because we have extra space reserved for
816 dbg_gen("dent '%pd' from ino %lu (nlink %d) in dir ino %lu",
817 dentry, inode->i_ino,
818 inode->i_nlink, dir->i_ino);
820 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
824 err = ubifs_purge_xattrs(inode);
828 sz_change = CALC_DENT_SIZE(fname_len(&nm));
830 ubifs_assert(c, inode_is_locked(dir));
831 ubifs_assert(c, inode_is_locked(inode));
832 err = dbg_check_synced_i_size(c, inode);
836 err = ubifs_budget_space(c, &req);
843 lock_2_inodes(dir, inode);
844 inode_set_ctime_current(inode);
846 dir->i_size -= sz_change;
847 dir_ui->ui_size = dir->i_size;
848 inode_set_mtime_to_ts(dir,
849 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
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 * ubifs_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
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(c, inode_is_locked(dir));
924 ubifs_assert(c, inode_is_locked(inode));
925 err = ubifs_check_dir_empty(d_inode(dentry));
929 err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
933 err = ubifs_purge_xattrs(inode);
937 sz_change = CALC_DENT_SIZE(fname_len(&nm));
939 err = ubifs_budget_space(c, &req);
946 lock_2_inodes(dir, inode);
947 inode_set_ctime_current(inode);
950 dir->i_size -= sz_change;
951 dir_ui->ui_size = dir->i_size;
952 inode_set_mtime_to_ts(dir,
953 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
954 err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
957 unlock_2_inodes(dir, inode);
960 ubifs_release_budget(c, &req);
962 /* We've deleted something - clean the "no space" flags */
963 c->bi.nospace = c->bi.nospace_rp = 0;
966 fscrypt_free_filename(&nm);
970 dir->i_size += sz_change;
971 dir_ui->ui_size = dir->i_size;
974 unlock_2_inodes(dir, inode);
976 ubifs_release_budget(c, &req);
978 fscrypt_free_filename(&nm);
982 static int ubifs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
983 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,
991 struct fscrypt_name nm;
994 * Budget request settings: new inode, new direntry and changing parent
998 dbg_gen("dent '%pd', mode %#hx in dir ino %lu",
999 dentry, mode, dir->i_ino);
1001 err = ubifs_budget_space(c, &req);
1005 err = ubifs_prepare_create(dir, dentry, &nm);
1009 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1011 inode = ubifs_new_inode(c, dir, S_IFDIR | mode, false);
1012 if (IS_ERR(inode)) {
1013 err = PTR_ERR(inode);
1017 err = ubifs_init_security(dir, inode, &dentry->d_name);
1021 mutex_lock(&dir_ui->ui_mutex);
1022 insert_inode_hash(inode);
1025 dir->i_size += sz_change;
1026 dir_ui->ui_size = dir->i_size;
1027 inode_set_mtime_to_ts(dir,
1028 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
1029 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1031 ubifs_err(c, "cannot create directory, error %d", err);
1034 mutex_unlock(&dir_ui->ui_mutex);
1036 ubifs_release_budget(c, &req);
1037 d_instantiate(dentry, inode);
1038 fscrypt_free_filename(&nm);
1042 dir->i_size -= sz_change;
1043 dir_ui->ui_size = dir->i_size;
1045 mutex_unlock(&dir_ui->ui_mutex);
1047 make_bad_inode(inode);
1050 fscrypt_free_filename(&nm);
1052 ubifs_release_budget(c, &req);
1056 static int ubifs_mknod(struct mnt_idmap *idmap, struct inode *dir,
1057 struct dentry *dentry, umode_t mode, dev_t rdev)
1059 struct inode *inode;
1060 struct ubifs_inode *ui;
1061 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1062 struct ubifs_info *c = dir->i_sb->s_fs_info;
1063 union ubifs_dev_desc *dev = NULL;
1065 int err, devlen = 0;
1066 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1068 struct fscrypt_name nm;
1071 * Budget request settings: new inode, new direntry and changing parent
1075 dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
1077 if (S_ISBLK(mode) || S_ISCHR(mode)) {
1078 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1081 devlen = ubifs_encode_dev(dev, rdev);
1084 req.new_ino_d = ALIGN(devlen, 8);
1085 err = ubifs_budget_space(c, &req);
1091 err = ubifs_prepare_create(dir, dentry, &nm);
1097 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1099 inode = ubifs_new_inode(c, dir, mode, false);
1100 if (IS_ERR(inode)) {
1102 err = PTR_ERR(inode);
1106 init_special_inode(inode, inode->i_mode, rdev);
1107 inode->i_size = ubifs_inode(inode)->ui_size = devlen;
1108 ui = ubifs_inode(inode);
1110 ui->data_len = devlen;
1112 err = ubifs_init_security(dir, inode, &dentry->d_name);
1116 mutex_lock(&dir_ui->ui_mutex);
1117 dir->i_size += sz_change;
1118 dir_ui->ui_size = dir->i_size;
1119 inode_set_mtime_to_ts(dir,
1120 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
1121 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1124 mutex_unlock(&dir_ui->ui_mutex);
1126 ubifs_release_budget(c, &req);
1127 insert_inode_hash(inode);
1128 d_instantiate(dentry, inode);
1129 fscrypt_free_filename(&nm);
1133 dir->i_size -= sz_change;
1134 dir_ui->ui_size = dir->i_size;
1135 mutex_unlock(&dir_ui->ui_mutex);
1137 /* Free inode->i_link before inode is marked as bad. */
1138 fscrypt_free_inode(inode);
1139 make_bad_inode(inode);
1142 fscrypt_free_filename(&nm);
1144 ubifs_release_budget(c, &req);
1148 static int ubifs_symlink(struct mnt_idmap *idmap, struct inode *dir,
1149 struct dentry *dentry, const char *symname)
1151 struct inode *inode;
1152 struct ubifs_inode *ui;
1153 struct ubifs_inode *dir_ui = ubifs_inode(dir);
1154 struct ubifs_info *c = dir->i_sb->s_fs_info;
1155 int err, sz_change, len = strlen(symname);
1156 struct fscrypt_str disk_link;
1157 struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
1159 struct fscrypt_name nm;
1161 dbg_gen("dent '%pd', target '%s' in dir ino %lu", dentry,
1162 symname, dir->i_ino);
1164 err = fscrypt_prepare_symlink(dir, symname, len, UBIFS_MAX_INO_DATA,
1170 * Budget request settings: new inode, new direntry and changing parent
1173 req.new_ino_d = ALIGN(disk_link.len - 1, 8);
1174 err = ubifs_budget_space(c, &req);
1178 err = ubifs_prepare_create(dir, dentry, &nm);
1182 sz_change = CALC_DENT_SIZE(fname_len(&nm));
1184 inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO, false);
1185 if (IS_ERR(inode)) {
1186 err = PTR_ERR(inode);
1190 ui = ubifs_inode(inode);
1191 ui->data = kmalloc(disk_link.len, GFP_NOFS);
1197 if (IS_ENCRYPTED(inode)) {
1198 disk_link.name = ui->data; /* encrypt directly into ui->data */
1199 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
1203 memcpy(ui->data, disk_link.name, disk_link.len);
1204 inode->i_link = ui->data;
1208 * The terminating zero byte is not written to the flash media and it
1209 * is put just to make later in-memory string processing simpler. Thus,
1210 * data length is @disk_link.len - 1, not @disk_link.len.
1212 ui->data_len = disk_link.len - 1;
1213 inode->i_size = ubifs_inode(inode)->ui_size = disk_link.len - 1;
1215 err = ubifs_init_security(dir, inode, &dentry->d_name);
1219 mutex_lock(&dir_ui->ui_mutex);
1220 dir->i_size += sz_change;
1221 dir_ui->ui_size = dir->i_size;
1222 inode_set_mtime_to_ts(dir,
1223 inode_set_ctime_to_ts(dir, inode_get_ctime(inode)));
1224 err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
1227 mutex_unlock(&dir_ui->ui_mutex);
1229 insert_inode_hash(inode);
1230 d_instantiate(dentry, inode);
1235 dir->i_size -= sz_change;
1236 dir_ui->ui_size = dir->i_size;
1237 mutex_unlock(&dir_ui->ui_mutex);
1239 /* Free inode->i_link before inode is marked as bad. */
1240 fscrypt_free_inode(inode);
1241 make_bad_inode(inode);
1244 fscrypt_free_filename(&nm);
1246 ubifs_release_budget(c, &req);
1251 * lock_4_inodes - a wrapper for locking three UBIFS inodes.
1252 * @inode1: first inode
1253 * @inode2: second inode
1254 * @inode3: third inode
1255 * @inode4: fourth inode
1257 * This function is used for 'ubifs_rename()' and @inode1 may be the same as
1258 * @inode2 whereas @inode3 and @inode4 may be %NULL.
1260 * We do not implement any tricks to guarantee strict lock ordering, because
1261 * VFS has already done it for us on the @i_mutex. So this is just a simple
1264 static void lock_4_inodes(struct inode *inode1, struct inode *inode2,
1265 struct inode *inode3, struct inode *inode4)
1267 mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
1268 if (inode2 != inode1)
1269 mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
1271 mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
1273 mutex_lock_nested(&ubifs_inode(inode4)->ui_mutex, WB_MUTEX_4);
1277 * unlock_4_inodes - a wrapper for unlocking three UBIFS inodes for rename.
1278 * @inode1: first inode
1279 * @inode2: second inode
1280 * @inode3: third inode
1281 * @inode4: fourth inode
1283 static void unlock_4_inodes(struct inode *inode1, struct inode *inode2,
1284 struct inode *inode3, struct inode *inode4)
1287 mutex_unlock(&ubifs_inode(inode4)->ui_mutex);
1289 mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
1290 if (inode1 != inode2)
1291 mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
1292 mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
1295 static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
1296 struct inode *new_dir, struct dentry *new_dentry,
1299 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1300 struct inode *old_inode = d_inode(old_dentry);
1301 struct inode *new_inode = d_inode(new_dentry);
1302 struct inode *whiteout = NULL;
1303 struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
1304 struct ubifs_inode *whiteout_ui = NULL;
1305 int err, release, sync = 0, move = (new_dir != old_dir);
1306 int is_dir = S_ISDIR(old_inode->i_mode);
1307 int unlink = !!new_inode, new_sz, old_sz;
1308 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1310 struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
1311 .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
1312 struct ubifs_budget_req wht_req;
1313 unsigned int saved_nlink;
1314 struct fscrypt_name old_nm, new_nm;
1317 * Budget request settings:
1318 * req: deletion direntry, new direntry, removing the old inode,
1319 * and changing old and new parent directory inodes.
1321 * wht_req: new whiteout inode for RENAME_WHITEOUT.
1323 * ino_req: marks the target inode as dirty and does not write it.
1326 dbg_gen("dent '%pd' ino %lu in dir ino %lu to dent '%pd' in dir ino %lu flags 0x%x",
1327 old_dentry, old_inode->i_ino, old_dir->i_ino,
1328 new_dentry, new_dir->i_ino, flags);
1331 ubifs_assert(c, inode_is_locked(new_inode));
1333 /* Budget for old inode's data when its nlink > 1. */
1334 req.dirtied_ino_d = ALIGN(ubifs_inode(new_inode)->data_len, 8);
1335 err = ubifs_purge_xattrs(new_inode);
1340 if (unlink && is_dir) {
1341 err = ubifs_check_dir_empty(new_inode);
1346 err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &old_nm);
1350 err = fscrypt_setup_filename(new_dir, &new_dentry->d_name, 0, &new_nm);
1352 fscrypt_free_filename(&old_nm);
1356 new_sz = CALC_DENT_SIZE(fname_len(&new_nm));
1357 old_sz = CALC_DENT_SIZE(fname_len(&old_nm));
1359 err = ubifs_budget_space(c, &req);
1361 fscrypt_free_filename(&old_nm);
1362 fscrypt_free_filename(&new_nm);
1365 err = ubifs_budget_space(c, &ino_req);
1367 fscrypt_free_filename(&old_nm);
1368 fscrypt_free_filename(&new_nm);
1369 ubifs_release_budget(c, &req);
1373 if (flags & RENAME_WHITEOUT) {
1374 union ubifs_dev_desc *dev = NULL;
1376 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
1383 * The whiteout inode without dentry is pinned in memory,
1384 * umount won't happen during rename process because we
1385 * got parent dentry.
1387 whiteout = create_whiteout(old_dir, old_dentry);
1388 if (IS_ERR(whiteout)) {
1389 err = PTR_ERR(whiteout);
1394 whiteout_ui = ubifs_inode(whiteout);
1395 whiteout_ui->data = dev;
1396 whiteout_ui->data_len = ubifs_encode_dev(dev, MKDEV(0, 0));
1397 ubifs_assert(c, !whiteout_ui->dirty);
1399 memset(&wht_req, 0, sizeof(struct ubifs_budget_req));
1400 wht_req.new_ino = 1;
1401 wht_req.new_ino_d = ALIGN(whiteout_ui->data_len, 8);
1403 * To avoid deadlock between space budget (holds ui_mutex and
1404 * waits wb work) and writeback work(waits ui_mutex), do space
1405 * budget before ubifs inodes locked.
1407 err = ubifs_budget_space(c, &wht_req);
1410 * Whiteout inode can not be written on flash by
1411 * ubifs_jnl_write_inode(), because it's neither
1412 * dirty nor zero-nlink.
1418 /* Add the old_dentry size to the old_dir size. */
1419 old_sz -= CALC_DENT_SIZE(fname_len(&old_nm));
1422 lock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1425 * Like most other Unix systems, set the @i_ctime for inodes on a
1428 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
1430 /* We must adjust parent link count when renaming directories */
1434 * @old_dir loses a link because we are moving
1435 * @old_inode to a different directory.
1437 drop_nlink(old_dir);
1439 * @new_dir only gains a link if we are not also
1440 * overwriting an existing directory.
1446 * @old_inode is not moving to a different directory,
1447 * but @old_dir still loses a link if we are
1448 * overwriting an existing directory.
1451 drop_nlink(old_dir);
1455 old_dir->i_size -= old_sz;
1456 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1459 * And finally, if we unlinked a direntry which happened to have the
1460 * same name as the moved direntry, we have to decrement @i_nlink of
1461 * the unlinked inode.
1465 * Directories cannot have hard-links, so if this is a
1466 * directory, just clear @i_nlink.
1468 saved_nlink = new_inode->i_nlink;
1470 clear_nlink(new_inode);
1472 drop_nlink(new_inode);
1474 new_dir->i_size += new_sz;
1475 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1479 * Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
1480 * is dirty, because this will be done later on at the end of
1483 if (IS_SYNC(old_inode)) {
1484 sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1485 if (unlink && IS_SYNC(new_inode))
1488 * S_SYNC flag of whiteout inherits from the old_dir, and we
1489 * have already checked the old dir inode. So there is no need
1490 * to check whiteout.
1494 err = ubifs_jnl_rename(c, old_dir, old_inode, &old_nm, new_dir,
1495 new_inode, &new_nm, whiteout, sync);
1499 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1500 ubifs_release_budget(c, &req);
1503 ubifs_release_budget(c, &wht_req);
1507 mutex_lock(&old_inode_ui->ui_mutex);
1508 release = old_inode_ui->dirty;
1509 mark_inode_dirty_sync(old_inode);
1510 mutex_unlock(&old_inode_ui->ui_mutex);
1513 ubifs_release_budget(c, &ino_req);
1514 if (IS_SYNC(old_inode))
1516 * Rename finished here. Although old inode cannot be updated
1517 * on flash, old ctime is not a big problem, don't return err
1518 * code to userspace.
1520 old_inode->i_sb->s_op->write_inode(old_inode, NULL);
1522 fscrypt_free_filename(&old_nm);
1523 fscrypt_free_filename(&new_nm);
1528 set_nlink(new_inode, saved_nlink);
1530 new_dir->i_size -= new_sz;
1531 ubifs_inode(new_dir)->ui_size = new_dir->i_size;
1533 old_dir->i_size += old_sz;
1534 ubifs_inode(old_dir)->ui_size = old_dir->i_size;
1539 drop_nlink(new_dir);
1545 unlock_4_inodes(old_dir, new_dir, new_inode, whiteout);
1547 ubifs_release_budget(c, &wht_req);
1551 ubifs_release_budget(c, &ino_req);
1552 ubifs_release_budget(c, &req);
1553 fscrypt_free_filename(&old_nm);
1554 fscrypt_free_filename(&new_nm);
1558 static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
1559 struct inode *new_dir, struct dentry *new_dentry)
1561 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1562 struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
1564 int sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
1565 struct inode *fst_inode = d_inode(old_dentry);
1566 struct inode *snd_inode = d_inode(new_dentry);
1568 struct fscrypt_name fst_nm, snd_nm;
1570 ubifs_assert(c, fst_inode && snd_inode);
1573 * Budget request settings: changing two direntries, changing the two
1574 * parent directory inodes.
1577 dbg_gen("dent '%pd' ino %lu in dir ino %lu exchange dent '%pd' ino %lu in dir ino %lu",
1578 old_dentry, fst_inode->i_ino, old_dir->i_ino,
1579 new_dentry, snd_inode->i_ino, new_dir->i_ino);
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 err = ubifs_budget_space(c, &req);
1595 lock_4_inodes(old_dir, new_dir, NULL, NULL);
1597 simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
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);
1617 fscrypt_free_filename(&fst_nm);
1618 fscrypt_free_filename(&snd_nm);
1622 static int ubifs_rename(struct mnt_idmap *idmap,
1623 struct inode *old_dir, struct dentry *old_dentry,
1624 struct inode *new_dir, struct dentry *new_dentry,
1628 struct ubifs_info *c = old_dir->i_sb->s_fs_info;
1630 if (flags & ~(RENAME_NOREPLACE | RENAME_WHITEOUT | RENAME_EXCHANGE))
1633 ubifs_assert(c, inode_is_locked(old_dir));
1634 ubifs_assert(c, inode_is_locked(new_dir));
1636 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1641 if (flags & RENAME_EXCHANGE)
1642 return ubifs_xrename(old_dir, old_dentry, new_dir, new_dentry);
1644 return do_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1647 int ubifs_getattr(struct mnt_idmap *idmap, const struct path *path,
1648 struct kstat *stat, u32 request_mask, unsigned int flags)
1651 struct inode *inode = d_inode(path->dentry);
1652 struct ubifs_inode *ui = ubifs_inode(inode);
1654 mutex_lock(&ui->ui_mutex);
1656 if (ui->flags & UBIFS_APPEND_FL)
1657 stat->attributes |= STATX_ATTR_APPEND;
1658 if (ui->flags & UBIFS_COMPR_FL)
1659 stat->attributes |= STATX_ATTR_COMPRESSED;
1660 if (ui->flags & UBIFS_CRYPT_FL)
1661 stat->attributes |= STATX_ATTR_ENCRYPTED;
1662 if (ui->flags & UBIFS_IMMUTABLE_FL)
1663 stat->attributes |= STATX_ATTR_IMMUTABLE;
1665 stat->attributes_mask |= (STATX_ATTR_APPEND |
1666 STATX_ATTR_COMPRESSED |
1667 STATX_ATTR_ENCRYPTED |
1668 STATX_ATTR_IMMUTABLE);
1670 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
1671 stat->blksize = UBIFS_BLOCK_SIZE;
1672 stat->size = ui->ui_size;
1675 * Unfortunately, the 'stat()' system call was designed for block
1676 * device based file systems, and it is not appropriate for UBIFS,
1677 * because UBIFS does not have notion of "block". For example, it is
1678 * difficult to tell how many block a directory takes - it actually
1679 * takes less than 300 bytes, but we have to round it to block size,
1680 * which introduces large mistake. This makes utilities like 'du' to
1681 * report completely senseless numbers. This is the reason why UBIFS
1682 * goes the same way as JFFS2 - it reports zero blocks for everything
1683 * but regular files, which makes more sense than reporting completely
1686 if (S_ISREG(inode->i_mode)) {
1687 size = ui->xattr_size;
1689 size = ALIGN(size, UBIFS_BLOCK_SIZE);
1691 * Note, user-space expects 512-byte blocks count irrespectively
1692 * of what was reported in @stat->size.
1694 stat->blocks = size >> 9;
1697 mutex_unlock(&ui->ui_mutex);
1701 const struct inode_operations ubifs_dir_inode_operations = {
1702 .lookup = ubifs_lookup,
1703 .create = ubifs_create,
1705 .symlink = ubifs_symlink,
1706 .unlink = ubifs_unlink,
1707 .mkdir = ubifs_mkdir,
1708 .rmdir = ubifs_rmdir,
1709 .mknod = ubifs_mknod,
1710 .rename = ubifs_rename,
1711 .setattr = ubifs_setattr,
1712 .getattr = ubifs_getattr,
1713 .listxattr = ubifs_listxattr,
1714 .update_time = ubifs_update_time,
1715 .tmpfile = ubifs_tmpfile,
1716 .fileattr_get = ubifs_fileattr_get,
1717 .fileattr_set = ubifs_fileattr_set,
1720 const struct file_operations ubifs_dir_operations = {
1721 .llseek = generic_file_llseek,
1722 .release = ubifs_dir_release,
1723 .read = generic_read_dir,
1724 .iterate_shared = ubifs_readdir,
1725 .fsync = ubifs_fsync,
1726 .unlocked_ioctl = ubifs_ioctl,
1727 #ifdef CONFIG_COMPAT
1728 .compat_ioctl = ubifs_compat_ioctl,