1 // SPDX-License-Identifier: GPL-2.0
7  * Laboratoire MASI - Institut Blaise Pascal
16  *  Big-endian to little-endian byte-swapping/bitmaps by
28 #include <linux/backing-dev.h>
73 					struct ext4_super_block *es);
75 				  struct ext4_super_block *es);
103  * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start
104  *   -> page lock -> i_data_sem (rw)
107  * sb_start_write -> i_mutex -> mmap_lock
108  * sb_start_write -> i_mutex -> transaction start -> page lock ->
112  * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) ->
114  * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start ->
118  * sb_start_write -> i_mutex -> mmap_lock
119  * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw)
122  * transaction start -> page lock(s) -> i_data_sem (rw)
144 #define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type)
160 #define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type)
179 	bh->b_end_io = end_io ? end_io : end_buffer_read_sync;  in __ext4_read_bh()
211 	return -EIO;  in ext4_read_bh()
239 		return ERR_PTR(-ENOMEM);  in __ext4_sb_bread_gfp()
254 	gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_mapping,  in ext4_sb_bread()
263 	gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_mapping,  in ext4_sb_bread_unmovable()
271 	struct buffer_head *bh = bdev_getblk(sb->s_bdev, block,  in ext4_sb_breadahead_unmovable()
272 			sb->s_blocksize, GFP_NOWAIT | __GFP_NOWARN);  in ext4_sb_breadahead_unmovable()
282 				 struct ext4_super_block *es)  in ext4_verify_csum_type()  argument
287 	return es->s_checksum_type == EXT4_CRC32C_CHKSUM;  in ext4_verify_csum_type()
291 			    struct ext4_super_block *es)  in ext4_superblock_csum()  argument
297 	csum = ext4_chksum(sbi, ~0, (char *)es, offset);  in ext4_superblock_csum()
303 				       struct ext4_super_block *es)  in ext4_superblock_csum_verify()  argument
308 	return es->s_checksum == ext4_superblock_csum(sb, es);  in ext4_superblock_csum_verify()
313 	struct ext4_super_block *es = EXT4_SB(sb)->s_es;  in ext4_superblock_csum_set()  local
318 	es->s_checksum = ext4_superblock_csum(sb, es);  in ext4_superblock_csum_set()
324 	return le32_to_cpu(bg->bg_block_bitmap_lo) |  in ext4_block_bitmap()
326 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);  in ext4_block_bitmap()
332 	return le32_to_cpu(bg->bg_inode_bitmap_lo) |  in ext4_inode_bitmap()
334 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);  in ext4_inode_bitmap()
340 	return le32_to_cpu(bg->bg_inode_table_lo) |  in ext4_inode_table()
342 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);  in ext4_inode_table()
348 	return le16_to_cpu(bg->bg_free_blocks_count_lo) |  in ext4_free_group_clusters()
350 		 (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0);  in ext4_free_group_clusters()
356 	return le16_to_cpu(READ_ONCE(bg->bg_free_inodes_count_lo)) |  in ext4_free_inodes_count()
358 		 (__u32)le16_to_cpu(READ_ONCE(bg->bg_free_inodes_count_hi)) << 16 : 0);  in ext4_free_inodes_count()
364 	return le16_to_cpu(bg->bg_used_dirs_count_lo) |  in ext4_used_dirs_count()
366 		 (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0);  in ext4_used_dirs_count()
372 	return le16_to_cpu(bg->bg_itable_unused_lo) |  in ext4_itable_unused_count()
374 		 (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0);  in ext4_itable_unused_count()
380 	bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk);  in ext4_block_bitmap_set()
382 		bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);  in ext4_block_bitmap_set()
388 	bg->bg_inode_bitmap_lo  = cpu_to_le32((u32)blk);  in ext4_inode_bitmap_set()
390 		bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32);  in ext4_inode_bitmap_set()
396 	bg->bg_inode_table_lo = cpu_to_le32((u32)blk);  in ext4_inode_table_set()
398 		bg->bg_inode_table_hi = cpu_to_le32(blk >> 32);  in ext4_inode_table_set()
404 	bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count);  in ext4_free_group_clusters_set()
406 		bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16);  in ext4_free_group_clusters_set()
412 	WRITE_ONCE(bg->bg_free_inodes_count_lo, cpu_to_le16((__u16)count));  in ext4_free_inodes_set()
414 		WRITE_ONCE(bg->bg_free_inodes_count_hi, cpu_to_le16(count >> 16));  in ext4_free_inodes_set()
420 	bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count);  in ext4_used_dirs_set()
422 		bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16);  in ext4_used_dirs_set()
428 	bg->bg_itable_unused_lo = cpu_to_le16((__u16)count);  in ext4_itable_unused_set()
430 		bg->bg_itable_unused_hi = cpu_to_le16(count >> 16);  in ext4_itable_unused_set()
435 	now = clamp_val(now, 0, (1ull << 40) - 1);  in __ext4_update_tstamp()
445 #define ext4_update_tstamp(es, tstamp) \  argument
446 	__ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \
448 #define ext4_get_tstamp(es, tstamp) \  argument
449 	__ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi)
458  * This function is designed to update the on-disk superblock only under
469 	struct ext4_super_block *es = sbi->s_es;  in ext4_maybe_update_superblock()  local
470 	journal_t *journal = sbi->s_journal;  in ext4_maybe_update_superblock()
476 	if (sb_rdonly(sb) || !(sb->s_flags & SB_ACTIVE) ||  in ext4_maybe_update_superblock()
477 	    !journal || (journal->j_flags & JBD2_UNMOUNT))  in ext4_maybe_update_superblock()
481 	last_update = ext4_get_tstamp(es, s_wtime);  in ext4_maybe_update_superblock()
483 	if (likely(now - last_update < EXT4_SB_REFRESH_INTERVAL_SEC))  in ext4_maybe_update_superblock()
486 	lifetime_write_kbytes = sbi->s_kbytes_written +  in ext4_maybe_update_superblock()
487 		((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -  in ext4_maybe_update_superblock()
488 		  sbi->s_sectors_written_start) >> 1);  in ext4_maybe_update_superblock()
496 	diff_size = lifetime_write_kbytes - le64_to_cpu(es->s_kbytes_written);  in ext4_maybe_update_superblock()
499 		schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in ext4_maybe_update_superblock()
504 	struct super_block		*sb = journal->j_private;  in ext4_journal_commit_callback()
509 	BUG_ON(txn->t_state == T_FINISHED);  in ext4_journal_commit_callback()
511 	ext4_process_freed_data(sb, txn->t_tid);  in ext4_journal_commit_callback()
514 	spin_lock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
515 	while (!list_empty(&txn->t_private_list)) {  in ext4_journal_commit_callback()
516 		jce = list_entry(txn->t_private_list.next,  in ext4_journal_commit_callback()
518 		list_del_init(&jce->jce_list);  in ext4_journal_commit_callback()
519 		spin_unlock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
520 		jce->jce_func(sb, jce, error);  in ext4_journal_commit_callback()
521 		spin_lock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
523 	spin_unlock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
561 		    (jh && (jh->b_transaction != transaction ||  in ext4_journalled_writepage_callback()
562 			    jh->b_next_transaction))) {  in ext4_journalled_writepage_callback()
566 	} while ((bh = bh->b_this_page) != head);  in ext4_journalled_writepage_callback()
574 	struct address_space *mapping = jinode->i_vfs_inode->i_mapping;  in ext4_journalled_submit_inode_data_buffers()
578 		.range_start = jinode->i_dirty_start,  in ext4_journalled_submit_inode_data_buffers()
579 		.range_end = jinode->i_dirty_end,  in ext4_journalled_submit_inode_data_buffers()
584 				 jinode->i_transaction);  in ext4_journalled_submit_inode_data_buffers()
591 	if (ext4_should_journal_data(jinode->i_vfs_inode))  in ext4_journal_submit_inode_data_buffers()
602 	if (!ext4_should_journal_data(jinode->i_vfs_inode))  in ext4_journal_finish_inode_data_buffers()
660 	spin_lock(&sbi->s_error_lock);  in save_error_info()
661 	sbi->s_add_error_count++;  in save_error_info()
662 	sbi->s_last_error_code = error;  in save_error_info()
663 	sbi->s_last_error_line = line;  in save_error_info()
664 	sbi->s_last_error_ino = ino;  in save_error_info()
665 	sbi->s_last_error_block = block;  in save_error_info()
666 	sbi->s_last_error_func = func;  in save_error_info()
667 	sbi->s_last_error_time = ktime_get_real_seconds();  in save_error_info()
668 	if (!sbi->s_first_error_time) {  in save_error_info()
669 		sbi->s_first_error_code = error;  in save_error_info()
670 		sbi->s_first_error_line = line;  in save_error_info()
671 		sbi->s_first_error_ino = ino;  in save_error_info()
672 		sbi->s_first_error_block = block;  in save_error_info()
673 		sbi->s_first_error_func = func;  in save_error_info()
674 		sbi->s_first_error_time = sbi->s_last_error_time;  in save_error_info()
676 	spin_unlock(&sbi->s_error_lock);  in save_error_info()
703 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_handle_error()
706 	EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in ext4_handle_error()
711 		set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags);  in ext4_handle_error()
713 			jbd2_journal_abort(journal, -EIO);  in ext4_handle_error()
716 	if (!bdev_read_only(sb->s_bdev)) {  in ext4_handle_error()
725 			schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in ext4_handle_error()
732 	 * could panic during 'reboot -f' as the underlying device got already  in ext4_handle_error()
736 		panic("EXT4-fs (device %s): panic forced after error\n",  in ext4_handle_error()
737 			sb->s_id);  in ext4_handle_error()
743 	ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");  in ext4_handle_error()
747 	 * sb->s_umount semaphore and setting it without proper remount  in ext4_handle_error()
757 	journal_t *journal = sbi->s_journal;  in update_super_work()
768 	if (!sb_rdonly(sbi->s_sb) && journal) {  in update_super_work()
769 		struct buffer_head *sbh = sbi->s_sbh;  in update_super_work()
780 		if (sbi->s_add_error_count > 0)  in update_super_work()
783 		ext4_update_super(sbi->s_sb);  in update_super_work()
785 			ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "  in update_super_work()
807 	ext4_commit_super(sbi->s_sb);  in update_super_work()
812 		___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state),	\
813 			     "EXT4-fs error")
831 		       "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",  in __ext4_error()
832 		       sb->s_id, function, line, current->comm, &vaf);  in __ext4_error()
847 	if (unlikely(ext4_forced_shutdown(inode->i_sb)))  in __ext4_error_inode()
850 	trace_ext4_error(inode->i_sb, function, line);  in __ext4_error_inode()
851 	if (ext4_error_ratelimit(inode->i_sb)) {  in __ext4_error_inode()
856 			printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "  in __ext4_error_inode()
858 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_inode()
859 			       block, current->comm, &vaf);  in __ext4_error_inode()
861 			printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "  in __ext4_error_inode()
863 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_inode()
864 			       current->comm, &vaf);  in __ext4_error_inode()
867 	fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED);  in __ext4_error_inode()
869 	ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block,  in __ext4_error_inode()
882 	if (unlikely(ext4_forced_shutdown(inode->i_sb)))  in __ext4_error_file()
885 	trace_ext4_error(inode->i_sb, function, line);  in __ext4_error_file()
886 	if (ext4_error_ratelimit(inode->i_sb)) {  in __ext4_error_file()
895 			       "EXT4-fs error (device %s): %s:%d: inode #%lu: "  in __ext4_error_file()
897 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_file()
898 			       block, current->comm, path, &vaf);  in __ext4_error_file()
901 			       "EXT4-fs error (device %s): %s:%d: inode #%lu: "  in __ext4_error_file()
903 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_file()
904 			       current->comm, path, &vaf);  in __ext4_error_file()
907 	fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED);  in __ext4_error_file()
909 	ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block,  in __ext4_error_file()
919 	case -EFSCORRUPTED:  in ext4_decode_error()
922 	case -EFSBADCRC:  in ext4_decode_error()
925 	case -EIO:  in ext4_decode_error()
928 	case -ENOMEM:  in ext4_decode_error()
931 	case -EROFS:  in ext4_decode_error()
932 		if (!sb || (EXT4_SB(sb)->s_journal &&  in ext4_decode_error()
933 			    EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT))  in ext4_decode_error()
944 			if (snprintf(nbuf, 16, "error %d", -errno) >= 0)  in ext4_decode_error()
968 	if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb))  in __ext4_std_error()
973 		printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n",  in __ext4_std_error()
974 		       sb->s_id, function, line, errstr);  in __ext4_std_error()
978 	ext4_handle_error(sb, false, -errno, 0, 0, function, line);  in __ext4_std_error()
988 		atomic_inc(&EXT4_SB(sb)->s_msg_count);  in __ext4_msg()
989 		if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state),  in __ext4_msg()
990 				  "EXT4-fs"))  in __ext4_msg()
998 		printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);  in __ext4_msg()
1000 		printk("%sEXT4-fs: %pV\n", prefix, &vaf);  in __ext4_msg()
1006 	atomic_inc(&EXT4_SB(sb)->s_warning_count);  in ext4_warning_ratelimit()
1007 	return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state),  in ext4_warning_ratelimit()
1008 			    "EXT4-fs warning");  in ext4_warning_ratelimit()
1023 	printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n",  in __ext4_warning()
1024 	       sb->s_id, function, line, &vaf);  in __ext4_warning()
1034 	if (!ext4_warning_ratelimit(inode->i_sb))  in __ext4_warning_inode()
1040 	printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: "  in __ext4_warning_inode()
1041 	       "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id,  in __ext4_warning_inode()
1042 	       function, line, inode->i_ino, current->comm, &vaf);  in __ext4_warning_inode()
1064 		printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ",  in __ext4_grp_locked_error()
1065 		       sb->s_id, function, line, grp);  in __ext4_grp_locked_error()
1078 		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in __ext4_grp_locked_error()
1079 		if (!bdev_read_only(sb->s_bdev)) {  in __ext4_grp_locked_error()
1082 			schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in __ext4_grp_locked_error()
1116 					    &grp->bb_state);  in ext4_mark_group_bitmap_corrupted()
1118 			percpu_counter_sub(&sbi->s_freeclusters_counter,  in ext4_mark_group_bitmap_corrupted()
1119 					   grp->bb_free);  in ext4_mark_group_bitmap_corrupted()
1124 					    &grp->bb_state);  in ext4_mark_group_bitmap_corrupted()
1129 			percpu_counter_sub(&sbi->s_freeinodes_counter,  in ext4_mark_group_bitmap_corrupted()
1137 	struct ext4_super_block *es = EXT4_SB(sb)->s_es;  in ext4_update_dynamic_rev()  local
1139 	if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV)  in ext4_update_dynamic_rev()
1147 	es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO);  in ext4_update_dynamic_rev()
1148 	es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE);  in ext4_update_dynamic_rev()
1149 	es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV);  in ext4_update_dynamic_rev()
1150 	/* leave es->s_feature_*compat flags alone */  in ext4_update_dynamic_rev()
1151 	/* es->s_uuid will be set by e2fsck if empty */  in ext4_update_dynamic_rev()
1162 	return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode;  in orphan_list_entry()
1170 		 le32_to_cpu(sbi->s_es->s_last_orphan));  in dump_orphan_list()
1173 	list_for_each(l, &sbi->s_orphan) {  in dump_orphan_list()
1177 		       inode->i_sb->s_id, inode->i_ino, inode,  in dump_orphan_list()
1178 		       inode->i_mode, inode->i_nlink,  in dump_orphan_list()
1191 	for (type--; type >= 0; type--)  in ext4_quotas_off()
1203 	return rcu_dereference_protected(sbi->s_qf_names[type],  in get_qf_name()
1204 					 lockdep_is_held(&sb->s_umount));  in get_qf_name()
1217 	block = ext4_count_free_clusters(sbi->s_sb);  in ext4_percpu_param_init()
1218 	ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block));  in ext4_percpu_param_init()
1219 	err = percpu_counter_init(&sbi->s_freeclusters_counter, block,  in ext4_percpu_param_init()
1222 		unsigned long freei = ext4_count_free_inodes(sbi->s_sb);  in ext4_percpu_param_init()
1223 		sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);  in ext4_percpu_param_init()
1224 		err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,  in ext4_percpu_param_init()
1228 		err = percpu_counter_init(&sbi->s_dirs_counter,  in ext4_percpu_param_init()
1229 					  ext4_count_dirs(sbi->s_sb), GFP_KERNEL);  in ext4_percpu_param_init()
1231 		err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,  in ext4_percpu_param_init()
1234 		err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0,  in ext4_percpu_param_init()
1237 		err = percpu_init_rwsem(&sbi->s_writepages_rwsem);  in ext4_percpu_param_init()
1240 		ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory");  in ext4_percpu_param_init()
1247 	percpu_counter_destroy(&sbi->s_freeclusters_counter);  in ext4_percpu_param_destroy()
1248 	percpu_counter_destroy(&sbi->s_freeinodes_counter);  in ext4_percpu_param_destroy()
1249 	percpu_counter_destroy(&sbi->s_dirs_counter);  in ext4_percpu_param_destroy()
1250 	percpu_counter_destroy(&sbi->s_dirtyclusters_counter);  in ext4_percpu_param_destroy()
1251 	percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);  in ext4_percpu_param_destroy()
1252 	percpu_free_rwsem(&sbi->s_writepages_rwsem);  in ext4_percpu_param_destroy()
1261 	group_desc = rcu_dereference(sbi->s_group_desc);  in ext4_group_desc_free()
1262 	for (i = 0; i < sbi->s_gdb_count; i++)  in ext4_group_desc_free()
1274 	flex_groups = rcu_dereference(sbi->s_flex_groups);  in ext4_flex_groups_free()
1276 		for (i = 0; i < sbi->s_flex_groups_allocated; i++)  in ext4_flex_groups_free()
1286 	struct ext4_super_block *es = sbi->s_es;  in ext4_put_super()  local
1293 	 * path which could have sbi->s_journal->j_task as NULL  in ext4_put_super()
1294 	 * Unregister sysfs before flush sbi->s_sb_upd_work.  in ext4_put_super()
1302 	if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount"))  in ext4_put_super()
1304 			 &sb->s_uuid);  in ext4_put_super()
1309 	flush_work(&sbi->s_sb_upd_work);  in ext4_put_super()
1310 	destroy_workqueue(sbi->rsv_conversion_wq);  in ext4_put_super()
1313 	if (sbi->s_journal) {  in ext4_put_super()
1314 		aborted = is_journal_aborted(sbi->s_journal);  in ext4_put_super()
1315 		err = jbd2_journal_destroy(sbi->s_journal);  in ext4_put_super()
1316 		sbi->s_journal = NULL;  in ext4_put_super()
1318 			ext4_abort(sb, -err, "Couldn't clean up the journal");  in ext4_put_super()
1323 	timer_shutdown_sync(&sbi->s_err_report);  in ext4_put_super()
1331 		es->s_state = cpu_to_le16(sbi->s_mount_state);  in ext4_put_super()
1339 	WARN_ON_ONCE(!(sbi->s_mount_state & EXT4_ERROR_FS) &&  in ext4_put_super()
1340 		     percpu_counter_sum(&sbi->s_dirtyclusters_counter));  in ext4_put_super()
1347 	/* Debugging code just in case the in-memory inode orphan list  in ext4_put_super()
1348 	 * isn't empty.  The on-disk one can be non-empty if we've  in ext4_put_super()
1350 	 * in-memory list had better be clean by this point. */  in ext4_put_super()
1351 	if (!list_empty(&sbi->s_orphan))  in ext4_put_super()
1353 	ASSERT(list_empty(&sbi->s_orphan));  in ext4_put_super()
1355 	sync_blockdev(sb->s_bdev);  in ext4_put_super()
1356 	invalidate_bdev(sb->s_bdev);  in ext4_put_super()
1357 	if (sbi->s_journal_bdev_file) {  in ext4_put_super()
1360 		 * floating about in memory - the physical journal device may  in ext4_put_super()
1361 		 * hotswapped, and it breaks the `ro-after' testing code.  in ext4_put_super()
1363 		sync_blockdev(file_bdev(sbi->s_journal_bdev_file));  in ext4_put_super()
1364 		invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));  in ext4_put_super()
1367 	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);  in ext4_put_super()
1368 	sbi->s_ea_inode_cache = NULL;  in ext4_put_super()
1370 	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);  in ext4_put_super()
1371 	sbi->s_ea_block_cache = NULL;  in ext4_put_super()
1375 	brelse(sbi->s_sbh);  in ext4_put_super()
1376 	sb->s_fs_info = NULL;  in ext4_put_super()
1381 	kobject_put(&sbi->s_kobj);  in ext4_put_super()
1382 	wait_for_completion(&sbi->s_kobj_unregister);  in ext4_put_super()
1383 	kfree(sbi->s_blockgroup_lock);  in ext4_put_super()
1384 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_put_super()
1385 	fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);  in ext4_put_super()
1387 	utf8_unload(sb->s_encoding);  in ext4_put_super()
1405 	inode_set_iversion(&ei->vfs_inode, 1);  in ext4_alloc_inode()
1406 	ei->i_flags = 0;  in ext4_alloc_inode()
1407 	spin_lock_init(&ei->i_raw_lock);  in ext4_alloc_inode()
1408 	ei->i_prealloc_node = RB_ROOT;  in ext4_alloc_inode()
1409 	atomic_set(&ei->i_prealloc_active, 0);  in ext4_alloc_inode()
1410 	rwlock_init(&ei->i_prealloc_lock);  in ext4_alloc_inode()
1411 	ext4_es_init_tree(&ei->i_es_tree);  in ext4_alloc_inode()
1412 	rwlock_init(&ei->i_es_lock);  in ext4_alloc_inode()
1413 	INIT_LIST_HEAD(&ei->i_es_list);  in ext4_alloc_inode()
1414 	ei->i_es_all_nr = 0;  in ext4_alloc_inode()
1415 	ei->i_es_shk_nr = 0;  in ext4_alloc_inode()
1416 	ei->i_es_shrink_lblk = 0;  in ext4_alloc_inode()
1417 	ei->i_reserved_data_blocks = 0;  in ext4_alloc_inode()
1418 	spin_lock_init(&(ei->i_block_reservation_lock));  in ext4_alloc_inode()
1419 	ext4_init_pending_tree(&ei->i_pending_tree);  in ext4_alloc_inode()
1421 	ei->i_reserved_quota = 0;  in ext4_alloc_inode()
1422 	memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));  in ext4_alloc_inode()
1424 	ei->jinode = NULL;  in ext4_alloc_inode()
1425 	INIT_LIST_HEAD(&ei->i_rsv_conversion_list);  in ext4_alloc_inode()
1426 	spin_lock_init(&ei->i_completed_io_lock);  in ext4_alloc_inode()
1427 	ei->i_sync_tid = 0;  in ext4_alloc_inode()
1428 	ei->i_datasync_tid = 0;  in ext4_alloc_inode()
1429 	atomic_set(&ei->i_unwritten, 0);  in ext4_alloc_inode()
1430 	INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);  in ext4_alloc_inode()
1431 	ext4_fc_init_inode(&ei->vfs_inode);  in ext4_alloc_inode()
1432 	mutex_init(&ei->i_fc_lock);  in ext4_alloc_inode()
1433 	return &ei->vfs_inode;  in ext4_alloc_inode()
1450 	if (!list_empty(&(EXT4_I(inode)->i_fc_list))) {  in ext4_free_in_core_inode()
1452 			__func__, inode->i_ino);  in ext4_free_in_core_inode()
1459 	if (!list_empty(&(EXT4_I(inode)->i_orphan))) {  in ext4_destroy_inode()
1460 		ext4_msg(inode->i_sb, KERN_ERR,  in ext4_destroy_inode()
1462 			 inode->i_ino, EXT4_I(inode));  in ext4_destroy_inode()
1469 	if (!(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ERROR_FS) &&  in ext4_destroy_inode()
1470 	    WARN_ON_ONCE(EXT4_I(inode)->i_reserved_data_blocks))  in ext4_destroy_inode()
1471 		ext4_msg(inode->i_sb, KERN_ERR,  in ext4_destroy_inode()
1473 			 inode->i_ino, EXT4_I(inode),  in ext4_destroy_inode()
1474 			 EXT4_I(inode)->i_reserved_data_blocks);  in ext4_destroy_inode()
1486 	INIT_LIST_HEAD(&ei->i_orphan);  in init_once()
1487 	init_rwsem(&ei->xattr_sem);  in init_once()
1488 	init_rwsem(&ei->i_data_sem);  in init_once()
1489 	inode_init_once(&ei->vfs_inode);  in init_once()
1490 	ext4_fc_init_inode(&ei->vfs_inode);  in init_once()
1502 		return -ENOMEM;  in init_inodecache()
1524 	if (EXT4_I(inode)->jinode) {  in ext4_clear_inode()
1526 					       EXT4_I(inode)->jinode);  in ext4_clear_inode()
1527 		jbd2_free_inode(EXT4_I(inode)->jinode);  in ext4_clear_inode()
1528 		EXT4_I(inode)->jinode = NULL;  in ext4_clear_inode()
1546 	if (generation && inode->i_generation != generation) {  in ext4_nfs_get_inode()
1548 		return ERR_PTR(-ESTALE);  in ext4_nfs_get_inode()
1598 	return EXT4_I(inode)->i_dquot;  in ext4_get_dquots()
1689 	{"remount-ro",	EXT4_MOUNT_ERRORS_RO},
1930 ext4_sb_read_encoding(const struct ext4_super_block *es)  in ext4_sb_read_encoding()  argument
1932 	__u16 magic = le16_to_cpu(es->s_encoding);  in ext4_sb_read_encoding()
1996 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_fc_free()
2003 		kfree(ctx->s_qf_names[i]);  in ext4_fc_free()
2005 	fscrypt_free_dummy_policy(&ctx->dummy_enc_policy);  in ext4_fc_free()
2015 		return -ENOMEM;  in ext4_init_fs_context()
2017 	fc->fs_private = ctx;  in ext4_init_fs_context()
2018 	fc->ops = &ext4_context_ops;  in ext4_init_fs_context()
2030 	struct ext4_fs_context *ctx = fc->fs_private;  in note_qf_name()
2033 	if (param->size < 1) {  in note_qf_name()
2035 		return -EINVAL;  in note_qf_name()
2037 	if (strchr(param->string, '/')) {  in note_qf_name()
2040 		return -EINVAL;  in note_qf_name()
2042 	if (ctx->s_qf_names[qtype]) {  in note_qf_name()
2043 		if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) {  in note_qf_name()
2047 			return -EINVAL;  in note_qf_name()
2052 	qname = kmemdup_nul(param->string, param->size, GFP_KERNEL);  in note_qf_name()
2056 		return -ENOMEM;  in note_qf_name()
2058 	ctx->s_qf_names[qtype] = qname;  in note_qf_name()
2059 	ctx->qname_spec |= 1 << qtype;  in note_qf_name()
2060 	ctx->spec |= EXT4_SPEC_JQUOTA;  in note_qf_name()
2069 	struct ext4_fs_context *ctx = fc->fs_private;  in unnote_qf_name()
2071 	kfree(ctx->s_qf_names[qtype]);  in unnote_qf_name()
2073 	ctx->s_qf_names[qtype] = NULL;  in unnote_qf_name()
2074 	ctx->qname_spec |= 1 << qtype;  in unnote_qf_name()
2075 	ctx->spec |= EXT4_SPEC_JQUOTA;  in unnote_qf_name()
2088 		return -EINVAL;  in ext4_parse_test_dummy_encryption()
2091 						  &ctx->dummy_enc_policy);  in ext4_parse_test_dummy_encryption()
2092 	if (err == -EINVAL) {  in ext4_parse_test_dummy_encryption()
2094 			 "Value of option \"%s\" is unrecognized", param->key);  in ext4_parse_test_dummy_encryption()
2095 	} else if (err == -EEXIST) {  in ext4_parse_test_dummy_encryption()
2098 		return -EINVAL;  in ext4_parse_test_dummy_encryption()
2107 	ctx->mask_s_##name |= flag;					\
2108 	ctx->vals_s_##name |= flag;					\
2115 	ctx->mask_s_##name |= flag;					\
2116 	ctx->vals_s_##name &= ~flag;					\
2123 	return (ctx->vals_s_##name & flag);				\
2136 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_parse_param()
2145 	is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;  in ext4_parse_param()
2147 	for (m = ext4_mount_opts; m->token != Opt_err; m++)  in ext4_parse_param()
2148 		if (token == m->token)  in ext4_parse_param()
2151 	ctx->opt_flags |= m->flags;  in ext4_parse_param()
2153 	if (m->flags & MOPT_EXPLICIT) {  in ext4_parse_param()
2154 		if (m->mount_opt & EXT4_MOUNT_DELALLOC) {  in ext4_parse_param()
2156 		} else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) {  in ext4_parse_param()
2160 			return -EINVAL;  in ext4_parse_param()
2163 	if (m->flags & MOPT_NOSUPPORT) {  in ext4_parse_param()
2165 			 param->key);  in ext4_parse_param()
2172 		if (!*param->string)  in ext4_parse_param()
2177 		if (!*param->string)  in ext4_parse_param()
2183 		if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ext4_parse_param()
2185 				 "Ignoring %s option on remount", param->key);  in ext4_parse_param()
2187 			ctx->s_sb_block = result.uint_32;  in ext4_parse_param()
2188 			ctx->spec |= EXT4_SPEC_s_sb_block;  in ext4_parse_param()
2193 			 param->key);  in ext4_parse_param()
2208 		ctx->s_jquota_fmt = result.uint_32;  in ext4_parse_param()
2209 		ctx->spec |= EXT4_SPEC_JQFMT;  in ext4_parse_param()
2215 		ctx->spec |= EXT4_SPEC_DATAJ;  in ext4_parse_param()
2225 			return -EINVAL;  in ext4_parse_param()
2227 		ctx->s_commit_interval = HZ * result.uint_32;  in ext4_parse_param()
2228 		ctx->spec |= EXT4_SPEC_s_commit_interval;  in ext4_parse_param()
2234 			return -EINVAL;  in ext4_parse_param()
2236 		ctx->s_want_extra_isize = result.uint_32;  in ext4_parse_param()
2237 		ctx->spec |= EXT4_SPEC_s_want_extra_isize;  in ext4_parse_param()
2240 		ctx->s_max_batch_time = result.uint_32;  in ext4_parse_param()
2241 		ctx->spec |= EXT4_SPEC_s_max_batch_time;  in ext4_parse_param()
2244 		ctx->s_min_batch_time = result.uint_32;  in ext4_parse_param()
2245 		ctx->spec |= EXT4_SPEC_s_min_batch_time;  in ext4_parse_param()
2252 				 "EXT4-fs: inode_readahead_blks must be "  in ext4_parse_param()
2254 			return -EINVAL;  in ext4_parse_param()
2256 		ctx->s_inode_readahead_blks = result.uint_32;  in ext4_parse_param()
2257 		ctx->spec |= EXT4_SPEC_s_inode_readahead_blks;  in ext4_parse_param()
2261 		ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;  in ext4_parse_param()
2262 		if (param->type == fs_value_is_string)  in ext4_parse_param()
2263 			ctx->s_li_wait_mult = result.uint_32;  in ext4_parse_param()
2264 		ctx->spec |= EXT4_SPEC_s_li_wait_mult;  in ext4_parse_param()
2267 		ctx->s_max_dir_size_kb = result.uint_32;  in ext4_parse_param()
2268 		ctx->spec |= EXT4_SPEC_s_max_dir_size_kb;  in ext4_parse_param()
2272 		ctx->s_fc_debug_max_replay = result.uint_32;  in ext4_parse_param()
2273 		ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay;  in ext4_parse_param()
2277 		ctx->s_stripe = result.uint_32;  in ext4_parse_param()
2278 		ctx->spec |= EXT4_SPEC_s_stripe;  in ext4_parse_param()
2281 		ctx->s_resuid = result.uid;  in ext4_parse_param()
2282 		ctx->spec |= EXT4_SPEC_s_resuid;  in ext4_parse_param()
2285 		ctx->s_resgid = result.gid;  in ext4_parse_param()
2286 		ctx->spec |= EXT4_SPEC_s_resgid;  in ext4_parse_param()
2292 			return -EINVAL;  in ext4_parse_param()
2294 		ctx->journal_devnum = result.uint_32;  in ext4_parse_param()
2295 		ctx->spec |= EXT4_SPEC_JOURNAL_DEV;  in ext4_parse_param()
2306 			return -EINVAL;  in ext4_parse_param()
2313 			return -EINVAL;  in ext4_parse_param()
2317 		ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev);  in ext4_parse_param()
2318 		ctx->spec |= EXT4_SPEC_JOURNAL_DEV;  in ext4_parse_param()
2325 				 " (must be 0-7)");  in ext4_parse_param()
2326 			return -EINVAL;  in ext4_parse_param()
2328 		ctx->journal_ioprio =  in ext4_parse_param()
2330 		ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO;  in ext4_parse_param()
2362 		return -EINVAL;  in ext4_parse_param()
2366 			ctx_set_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2368 			ctx_clear_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2373 			ctx->spec |= EXT4_SPEC_mb_optimize_scan;  in ext4_parse_param()
2376 			ctx->spec |= EXT4_SPEC_mb_optimize_scan;  in ext4_parse_param()
2380 			return -EINVAL;  in ext4_parse_param()
2389 	if (m->token == Opt_err) {  in ext4_parse_param()
2391 			 param->key);  in ext4_parse_param()
2393 		return -EINVAL;  in ext4_parse_param()
2399 		if ((param->type == fs_value_is_flag) ||  in ext4_parse_param()
2403 		if (m->flags & MOPT_CLEAR)  in ext4_parse_param()
2405 		else if (unlikely(!(m->flags & MOPT_SET))) {  in ext4_parse_param()
2408 				 param->key);  in ext4_parse_param()
2410 			return -EINVAL;  in ext4_parse_param()
2412 		if (m->flags & MOPT_2) {  in ext4_parse_param()
2414 				ctx_set_mount_opt2(ctx, m->mount_opt);  in ext4_parse_param()
2416 				ctx_clear_mount_opt2(ctx, m->mount_opt);  in ext4_parse_param()
2419 				ctx_set_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2421 				ctx_clear_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2454 					return -ENOMEM;  in parse_options()
2482 	int ret = -ENOMEM;  in parse_apply_sb_mount_options()
2484 	if (!sbi->s_es->s_mount_opts[0])  in parse_apply_sb_mount_options()
2487 	s_mount_opts = kstrndup(sbi->s_es->s_mount_opts,  in parse_apply_sb_mount_options()
2488 				sizeof(sbi->s_es->s_mount_opts),  in parse_apply_sb_mount_options()
2501 	fc->fs_private = s_ctx;  in parse_apply_sb_mount_options()
2502 	fc->s_fs_info = sbi;  in parse_apply_sb_mount_options()
2518 	if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV)  in parse_apply_sb_mount_options()
2519 		m_ctx->journal_devnum = s_ctx->journal_devnum;  in parse_apply_sb_mount_options()
2520 	if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)  in parse_apply_sb_mount_options()
2521 		m_ctx->journal_ioprio = s_ctx->journal_ioprio;  in parse_apply_sb_mount_options()
2540 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_apply_quota_options()
2548 	if (ctx->spec & EXT4_SPEC_JQUOTA) {  in ext4_apply_quota_options()
2550 			if (!(ctx->qname_spec & (1 << i)))  in ext4_apply_quota_options()
2553 			qname = ctx->s_qf_names[i]; /* May be NULL */  in ext4_apply_quota_options()
2556 			ctx->s_qf_names[i] = NULL;  in ext4_apply_quota_options()
2557 			qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,  in ext4_apply_quota_options()
2558 						lockdep_is_held(&sb->s_umount));  in ext4_apply_quota_options()
2564 	if (ctx->spec & EXT4_SPEC_JQFMT)  in ext4_apply_quota_options()
2565 		sbi->s_jquota_fmt = ctx->s_jquota_fmt;  in ext4_apply_quota_options()
2576 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_quota_consistency()
2591 			 "Cannot enable project quota enforcement.");  in ext4_check_quota_consistency()
2592 		return -EINVAL;  in ext4_check_quota_consistency()
2598 	    ctx->mask_s_mount_opt & quota_flags &&  in ext4_check_quota_consistency()
2602 	if (ctx->spec & EXT4_SPEC_JQUOTA) {  in ext4_check_quota_consistency()
2605 			if (!(ctx->qname_spec & (1 << i)))  in ext4_check_quota_consistency()
2609 			    !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i])  in ext4_check_quota_consistency()
2612 			if (sbi->s_qf_names[i] && ctx->s_qf_names[i] &&  in ext4_check_quota_consistency()
2614 				   ctx->s_qf_names[i]) != 0)  in ext4_check_quota_consistency()
2626 	if (ctx->spec & EXT4_SPEC_JQFMT) {  in ext4_check_quota_consistency()
2627 		if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded)  in ext4_check_quota_consistency()
2638 		       ctx->s_qf_names[USRQUOTA]);  in ext4_check_quota_consistency()
2640 		       ctx->s_qf_names[GRPQUOTA]);  in ext4_check_quota_consistency()
2661 			return -EINVAL;  in ext4_check_quota_consistency()
2664 		if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) {  in ext4_check_quota_consistency()
2667 			return -EINVAL;  in ext4_check_quota_consistency()
2676 	return -EINVAL;  in ext4_check_quota_consistency()
2680 	return -EINVAL;  in ext4_check_quota_consistency()
2684 	return -EINVAL;  in ext4_check_quota_consistency()
2693 	const struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_test_dummy_encryption()
2696 	if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2702 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2710 	if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ext4_check_test_dummy_encryption()
2711 		if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,  in ext4_check_test_dummy_encryption()
2712 						 &ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2716 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2719 	if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) {  in ext4_check_test_dummy_encryption()
2720 		if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,  in ext4_check_test_dummy_encryption()
2721 						 &ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2725 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2733 	if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) ||  in ext4_apply_test_dummy_encryption()
2735 	    fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy))  in ext4_apply_test_dummy_encryption()
2737 	EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy;  in ext4_apply_test_dummy_encryption()
2738 	memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy));  in ext4_apply_test_dummy_encryption()
2745 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_opt_consistency()
2746 	struct ext4_sb_info *sbi = fc->s_fs_info;  in ext4_check_opt_consistency()
2747 	int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;  in ext4_check_opt_consistency()
2750 	if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) {  in ext4_check_opt_consistency()
2753 		return -EINVAL;  in ext4_check_opt_consistency()
2755 	if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) {  in ext4_check_opt_consistency()
2758 		return -EINVAL;  in ext4_check_opt_consistency()
2761 	if (ctx->s_want_extra_isize >  in ext4_check_opt_consistency()
2762 	    (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) {  in ext4_check_opt_consistency()
2765 			 ctx->s_want_extra_isize);  in ext4_check_opt_consistency()
2766 		return -EINVAL;  in ext4_check_opt_consistency()
2773 	if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) {  in ext4_check_opt_consistency()
2774 		if (!sbi->s_journal) {  in ext4_check_opt_consistency()
2783 			return -EINVAL;  in ext4_check_opt_consistency()
2792 			return -EINVAL;  in ext4_check_opt_consistency()
2796 		    (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||  in ext4_check_opt_consistency()
2797 		     (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) {  in ext4_check_opt_consistency()
2801 			return -EINVAL;  in ext4_check_opt_consistency()
2803 			 (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||  in ext4_check_opt_consistency()
2804 			  (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) {  in ext4_check_opt_consistency()
2807 			   ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||  in ext4_check_opt_consistency()
2808 			    (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||  in ext4_check_opt_consistency()
2809 			    !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) {  in ext4_check_opt_consistency()
2819 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_apply_options()
2820 	struct ext4_sb_info *sbi = fc->s_fs_info;  in ext4_apply_options()
2822 	sbi->s_mount_opt &= ~ctx->mask_s_mount_opt;  in ext4_apply_options()
2823 	sbi->s_mount_opt |= ctx->vals_s_mount_opt;  in ext4_apply_options()
2824 	sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2;  in ext4_apply_options()
2825 	sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2;  in ext4_apply_options()
2826 	sb->s_flags &= ~ctx->mask_s_flags;  in ext4_apply_options()
2827 	sb->s_flags |= ctx->vals_s_flags;  in ext4_apply_options()
2829 #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; })  in ext4_apply_options()
2853 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_validate_options()
2856 	usr_qf_name = ctx->s_qf_names[USRQUOTA];  in ext4_validate_options()
2857 	grp_qf_name = ctx->s_qf_names[GRPQUOTA];  in ext4_validate_options()
2870 			return -EINVAL;  in ext4_validate_options()
2884 	if (sbi->s_jquota_fmt) {  in ext4_show_quota_options()
2887 		switch (sbi->s_jquota_fmt) {  in ext4_show_quota_options()
2902 	usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]);  in ext4_show_quota_options()
2903 	grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]);  in ext4_show_quota_options()
2916 	for (spec = ext4_param_specs; spec->name != NULL; spec++)  in token2str()
2917 		if (spec->opt == token && !spec->type)  in token2str()
2919 	return spec->name;  in token2str()
2924  *  - it's set to a non-default value OR
2925  *  - if the per-sb default is different from the global default
2931 	struct ext4_super_block *es = sbi->s_es;  in _ext4_show_options()  local
2939 	if (sbi->s_sb_block != 1)  in _ext4_show_options()
2940 		SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block);  in _ext4_show_options()
2942 	for (m = ext4_mount_opts; m->token != Opt_err; m++) {  in _ext4_show_options()
2943 		int want_set = m->flags & MOPT_SET;  in _ext4_show_options()
2944 		int opt_2 = m->flags & MOPT_2;  in _ext4_show_options()
2947 		if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) ||  in _ext4_show_options()
2948 		    m->flags & MOPT_SKIP)  in _ext4_show_options()
2952 			mount_opt = sbi->s_mount_opt2;  in _ext4_show_options()
2953 			def_mount_opt = sbi->s_def_mount_opt2;  in _ext4_show_options()
2955 			mount_opt = sbi->s_mount_opt;  in _ext4_show_options()
2956 			def_mount_opt = sbi->s_def_mount_opt;  in _ext4_show_options()
2959 		if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt)))  in _ext4_show_options()
2963 		     (mount_opt & m->mount_opt) != m->mount_opt) ||  in _ext4_show_options()
2964 		    (!want_set && (mount_opt & m->mount_opt)))  in _ext4_show_options()
2966 		SEQ_OPTS_PRINT("%s", token2str(m->token));  in _ext4_show_options()
2969 	if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) ||  in _ext4_show_options()
2970 	    le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID)  in _ext4_show_options()
2972 				from_kuid_munged(&init_user_ns, sbi->s_resuid));  in _ext4_show_options()
2973 	if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) ||  in _ext4_show_options()
2974 	    le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID)  in _ext4_show_options()
2976 				from_kgid_munged(&init_user_ns, sbi->s_resgid));  in _ext4_show_options()
2977 	def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors);  in _ext4_show_options()
2979 		SEQ_OPTS_PUTS("errors=remount-ro");  in _ext4_show_options()
2984 	if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ)  in _ext4_show_options()
2985 		SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ);  in _ext4_show_options()
2986 	if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME)  in _ext4_show_options()
2987 		SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time);  in _ext4_show_options()
2988 	if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME)  in _ext4_show_options()
2989 		SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time);  in _ext4_show_options()
2990 	if (nodefs || sbi->s_stripe)  in _ext4_show_options()
2991 		SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe);  in _ext4_show_options()
2993 			(sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {  in _ext4_show_options()
3002 	    sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS)  in _ext4_show_options()
3004 			       sbi->s_inode_readahead_blks);  in _ext4_show_options()
3007 		       (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT)))  in _ext4_show_options()
3008 		SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult);  in _ext4_show_options()
3009 	if (nodefs || sbi->s_max_dir_size_kb)  in _ext4_show_options()
3010 		SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);  in _ext4_show_options()
3016 	if (sb->s_flags & SB_INLINECRYPT)  in _ext4_show_options()
3030 	if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&  in _ext4_show_options()
3033 	} else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&  in _ext4_show_options()
3047 	return _ext4_show_options(seq, root->d_sb, 0);  in ext4_show_options()
3052 	struct super_block *sb = seq->private;  in ext4_seq_options_show()
3061 static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,  in ext4_setup_super()  argument
3067 	if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) {  in ext4_setup_super()
3069 			 "forcing read-only mode");  in ext4_setup_super()
3070 		err = -EROFS;  in ext4_setup_super()
3075 	if (!(sbi->s_mount_state & EXT4_VALID_FS))  in ext4_setup_super()
3078 	else if (sbi->s_mount_state & EXT4_ERROR_FS)  in ext4_setup_super()
3082 	else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 &&  in ext4_setup_super()
3083 		 le16_to_cpu(es->s_mnt_count) >=  in ext4_setup_super()
3084 		 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))  in ext4_setup_super()
3088 	else if (le32_to_cpu(es->s_checkinterval) &&  in ext4_setup_super()
3089 		 (ext4_get_tstamp(es, s_lastcheck) +  in ext4_setup_super()
3090 		  le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds()))  in ext4_setup_super()
3094 	if (!sbi->s_journal)  in ext4_setup_super()
3095 		es->s_state &= cpu_to_le16(~EXT4_VALID_FS);  in ext4_setup_super()
3096 	if (!(__s16) le16_to_cpu(es->s_max_mnt_count))  in ext4_setup_super()
3097 		es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT);  in ext4_setup_super()
3098 	le16_add_cpu(&es->s_mnt_count, 1);  in ext4_setup_super()
3099 	ext4_update_tstamp(es, s_mtime);  in ext4_setup_super()
3100 	if (sbi->s_journal) {  in ext4_setup_super()
3111 			sb->s_blocksize,  in ext4_setup_super()
3112 			sbi->s_groups_count,  in ext4_setup_super()
3115 			sbi->s_mount_opt, sbi->s_mount_opt2);  in ext4_setup_super()
3125 	if (!sbi->s_log_groups_per_flex)  in ext4_alloc_flex_bg_array()
3128 	size = ext4_flex_group(sbi, ngroup - 1) + 1;  in ext4_alloc_flex_bg_array()
3129 	if (size <= sbi->s_flex_groups_allocated)  in ext4_alloc_flex_bg_array()
3133 			      sizeof(*sbi->s_flex_groups)), GFP_KERNEL);  in ext4_alloc_flex_bg_array()
3137 		return -ENOMEM;  in ext4_alloc_flex_bg_array()
3139 	for (i = sbi->s_flex_groups_allocated; i < size; i++) {  in ext4_alloc_flex_bg_array()
3144 			for (j = sbi->s_flex_groups_allocated; j < i; j++)  in ext4_alloc_flex_bg_array()
3149 			return -ENOMEM;  in ext4_alloc_flex_bg_array()
3153 	old_groups = rcu_dereference(sbi->s_flex_groups);  in ext4_alloc_flex_bg_array()
3156 		       (sbi->s_flex_groups_allocated *  in ext4_alloc_flex_bg_array()
3159 	rcu_assign_pointer(sbi->s_flex_groups, new_groups);  in ext4_alloc_flex_bg_array()
3160 	sbi->s_flex_groups_allocated = size;  in ext4_alloc_flex_bg_array()
3174 	sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;  in ext4_fill_flex_info()
3175 	if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) {  in ext4_fill_flex_info()
3176 		sbi->s_log_groups_per_flex = 0;  in ext4_fill_flex_info()
3180 	err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);  in ext4_fill_flex_info()
3184 	for (i = 0; i < sbi->s_groups_count; i++) {  in ext4_fill_flex_info()
3189 		atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes);  in ext4_fill_flex_info()
3191 			     &fg->free_clusters);  in ext4_fill_flex_info()
3192 		atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs);  in ext4_fill_flex_info()
3208 	if (ext4_has_metadata_csum(sbi->s_sb)) {  in ext4_group_desc_csum()
3213 		csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group,  in ext4_group_desc_csum()
3219 		if (offset < sbi->s_desc_size)  in ext4_group_desc_csum()
3221 					     sbi->s_desc_size - offset);  in ext4_group_desc_csum()
3231 	crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));  in ext4_group_desc_csum()
3234 	offset += sizeof(gdp->bg_checksum); /* skip checksum */  in ext4_group_desc_csum()
3236 	if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size)  in ext4_group_desc_csum()
3238 			    sbi->s_desc_size - offset);  in ext4_group_desc_csum()
3248 	    (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp)))  in ext4_group_desc_csum_verify()
3259 	gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp);  in ext4_group_desc_csum_set()
3262 /* Called at mount-time, super-block is locked */
3268 	ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);  in ext4_check_descriptors()
3275 	ext4_group_t i, grp = sbi->s_groups_count;  in ext4_check_descriptors()
3282 	for (i = 0; i < sbi->s_groups_count; i++) {  in ext4_check_descriptors()
3285 		if (i == sbi->s_groups_count - 1 || flexbg_flag)  in ext4_check_descriptors()
3286 			last_block = ext4_blocks_count(sbi->s_es) - 1;  in ext4_check_descriptors()
3289 				(EXT4_BLOCKS_PER_GROUP(sb) - 1);  in ext4_check_descriptors()
3291 		if ((grp == sbi->s_groups_count) &&  in ext4_check_descriptors()
3292 		   !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_check_descriptors()
3356 		    inode_table + sbi->s_itb_per_group - 1 > last_block) {  in ext4_check_descriptors()
3367 				     gdp)), le16_to_cpu(gdp->bg_checksum));  in ext4_check_descriptors()
3384  * Resulting logical blkno at s_maxbytes must fit in our on-disk
3391  * covering maximum file size must fit into on-disk format containers as
3405 		upper_limit = (1LL << 32) - 1;  in ext4_max_size()
3408 		upper_limit >>= (blkbits - 9);  in ext4_max_size()
3413 	 * 32-bit extent-start container, ee_block. We lower the maxbytes  in ext4_max_size()
3417 	res = (1LL << 32) - 1;  in ext4_max_size()
3420 	/* Sanity check against vm- & vfs- imposed limits */  in ext4_max_size()
3428  * Maximal bitmap file size.  There is a direct, and {,double-,triple-}indirect
3429  * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks.
3436 	unsigned int ppb = 1 << (bits - 2);  in ext4_max_bitmap_size()
3440 	 * mapped file such that the file's total number of 512-byte sectors,  in ext4_max_bitmap_size()
3441 	 * including data and all indirect blocks, does not exceed (2^48 - 1).  in ext4_max_bitmap_size()
3444 	 * number of 512-byte sectors of the file.  in ext4_max_bitmap_size()
3449 		 * represents total file blocks in 2^32 512-byte sectors ==  in ext4_max_bitmap_size()
3452 		upper_limit = (1LL << 32) - 1;  in ext4_max_bitmap_size()
3455 		upper_limit >>= (bits - 9);  in ext4_max_bitmap_size()
3464 		upper_limit = (1LL << 48) - 1;  in ext4_max_bitmap_size()
3482 	upper_limit -= EXT4_NDIR_BLOCKS;  in ext4_max_bitmap_size()
3485 	upper_limit -= ppb;  in ext4_max_bitmap_size()
3489 		res -= meta_blocks;  in ext4_max_bitmap_size()
3493 	upper_limit -= ppb * ppb;  in ext4_max_bitmap_size()
3497 	res -= meta_blocks;  in ext4_max_bitmap_size()
3513 	first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);  in descriptor_loc()
3517 	bg = sbi->s_desc_per_block * nr;  in descriptor_loc()
3527 	if (sb->s_blocksize == 1024 && nr == 0 &&  in descriptor_loc()
3528 	    le32_to_cpu(sbi->s_es->s_first_data_block) == 0)  in descriptor_loc()
3547 	unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride);  in ext4_get_stripe_size()
3549 			le32_to_cpu(sbi->s_es->s_raid_stripe_width);  in ext4_get_stripe_size()
3552 	if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3553 		ret = sbi->s_stripe;  in ext4_get_stripe_size()
3554 	else if (stripe_width && stripe_width <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3556 	else if (stride && stride <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3583 			(le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) &  in ext4_feature_set_ok()
3599 		ext4_msg(sb, KERN_INFO, "filesystem is read-only");  in ext4_feature_set_ok()
3600 		sb->s_flags |= SB_RDONLY;  in ext4_feature_set_ok()
3604 	/* Check that feature set is OK for a read-write mount */  in ext4_feature_set_ok()
3608 			 (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) &  in ext4_feature_set_ok()
3637 	struct super_block *sb = sbi->s_sb;  in print_daily_error_info()
3638 	struct ext4_super_block *es = sbi->s_es;  in print_daily_error_info()  local
3640 	if (es->s_error_count)  in print_daily_error_info()
3643 			 le32_to_cpu(es->s_error_count));  in print_daily_error_info()
3644 	if (es->s_first_error_time) {  in print_daily_error_info()
3645 		printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d",  in print_daily_error_info()
3646 		       sb->s_id,  in print_daily_error_info()
3647 		       ext4_get_tstamp(es, s_first_error_time),  in print_daily_error_info()
3648 		       (int) sizeof(es->s_first_error_func),  in print_daily_error_info()
3649 		       es->s_first_error_func,  in print_daily_error_info()
3650 		       le32_to_cpu(es->s_first_error_line));  in print_daily_error_info()
3651 		if (es->s_first_error_ino)  in print_daily_error_info()
3653 			       le32_to_cpu(es->s_first_error_ino));  in print_daily_error_info()
3654 		if (es->s_first_error_block)  in print_daily_error_info()
3656 			       le64_to_cpu(es->s_first_error_block));  in print_daily_error_info()
3659 	if (es->s_last_error_time) {  in print_daily_error_info()
3660 		printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d",  in print_daily_error_info()
3661 		       sb->s_id,  in print_daily_error_info()
3662 		       ext4_get_tstamp(es, s_last_error_time),  in print_daily_error_info()
3663 		       (int) sizeof(es->s_last_error_func),  in print_daily_error_info()
3664 		       es->s_last_error_func,  in print_daily_error_info()
3665 		       le32_to_cpu(es->s_last_error_line));  in print_daily_error_info()
3666 		if (es->s_last_error_ino)  in print_daily_error_info()
3668 			       le32_to_cpu(es->s_last_error_ino));  in print_daily_error_info()
3669 		if (es->s_last_error_block)  in print_daily_error_info()
3671 			       le64_to_cpu(es->s_last_error_block));  in print_daily_error_info()
3674 	mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);  /* Once a day */  in print_daily_error_info()
3681 	struct super_block *sb = elr->lr_super;  in ext4_run_li_request()
3682 	ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;  in ext4_run_li_request()
3683 	ext4_group_t group = elr->lr_next_group;  in ext4_run_li_request()
3686 	int nr = EXT4_SB(sb)->s_mb_prefetch;  in ext4_run_li_request()
3689 	if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) {  in ext4_run_li_request()
3690 		elr->lr_next_group = ext4_mb_prefetch(sb, group, nr, &prefetch_ios);  in ext4_run_li_request()
3691 		ext4_mb_prefetch_fini(sb, elr->lr_next_group, nr);  in ext4_run_li_request()
3692 		trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, nr);  in ext4_run_li_request()
3693 		if (group >= elr->lr_next_group) {  in ext4_run_li_request()
3695 			if (elr->lr_first_not_zeroed != ngroups &&  in ext4_run_li_request()
3697 				elr->lr_next_group = elr->lr_first_not_zeroed;  in ext4_run_li_request()
3698 				elr->lr_mode = EXT4_LI_MODE_ITABLE;  in ext4_run_li_request()
3712 		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_run_li_request()
3722 					    elr->lr_timeout ? 0 : 1);  in ext4_run_li_request()
3724 		if (elr->lr_timeout == 0) {  in ext4_run_li_request()
3725 			elr->lr_timeout = nsecs_to_jiffies((ktime_get_ns() - start_time) *  in ext4_run_li_request()
3726 				EXT4_SB(elr->lr_super)->s_li_wait_mult);  in ext4_run_li_request()
3728 		elr->lr_next_sched = jiffies + elr->lr_timeout;  in ext4_run_li_request()
3729 		elr->lr_next_group = group + 1;  in ext4_run_li_request()
3743 	list_del(&elr->lr_request);  in ext4_remove_li_request()
3744 	EXT4_SB(elr->lr_super)->s_li_request = NULL;  in ext4_remove_li_request()
3756 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_unregister_li_request()
3757 	ext4_remove_li_request(EXT4_SB(sb)->s_li_request);  in ext4_unregister_li_request()
3758 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_unregister_li_request()
3788 		mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3789 		if (list_empty(&eli->li_request_list)) {  in ext4_lazyinit_thread()
3790 			mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3793 		list_for_each_safe(pos, n, &eli->li_request_list) {  in ext4_lazyinit_thread()
3799 			if (time_before(jiffies, elr->lr_next_sched)) {  in ext4_lazyinit_thread()
3801 				    time_before(elr->lr_next_sched, next_wakeup)) {  in ext4_lazyinit_thread()
3802 					next_wakeup = elr->lr_next_sched;  in ext4_lazyinit_thread()
3807 			if (down_read_trylock(&elr->lr_super->s_umount)) {  in ext4_lazyinit_thread()
3808 				if (sb_start_write_trylock(elr->lr_super)) {  in ext4_lazyinit_thread()
3811 					 * We hold sb->s_umount, sb can not  in ext4_lazyinit_thread()
3815 					mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3817 					sb_end_write(elr->lr_super);  in ext4_lazyinit_thread()
3818 					mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3819 					n = pos->next;  in ext4_lazyinit_thread()
3821 				up_read((&elr->lr_super->s_umount));  in ext4_lazyinit_thread()
3829 				elr->lr_next_sched = jiffies +  in ext4_lazyinit_thread()
3833 			    time_before(elr->lr_next_sched, next_wakeup)) {  in ext4_lazyinit_thread()
3834 				next_wakeup = elr->lr_next_sched;  in ext4_lazyinit_thread()
3838 		mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3848 		schedule_timeout_interruptible(next_wakeup - cur);  in ext4_lazyinit_thread()
3866 	mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3867 	if (!list_empty(&eli->li_request_list)) {  in ext4_lazyinit_thread()
3868 		mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3872 	mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3885 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_clear_request_list()
3886 	list_for_each_safe(pos, n, &ext4_li_info->li_request_list) {  in ext4_clear_request_list()
3891 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_clear_request_list()
3903 		printk(KERN_CRIT "EXT4-fs: error %d creating inode table "  in ext4_run_lazyinit_thread()
3908 	ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING;  in ext4_run_lazyinit_thread()
3920 	ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count;  in ext4_has_uninit_itable()
3931 		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_has_uninit_itable()
3944 		return -ENOMEM;  in ext4_li_info_new()
3946 	INIT_LIST_HEAD(&eli->li_request_list);  in ext4_li_info_new()
3947 	mutex_init(&eli->li_list_mtx);  in ext4_li_info_new()
3949 	eli->li_state |= EXT4_LAZYINIT_QUIT;  in ext4_li_info_new()
3965 	elr->lr_super = sb;  in ext4_li_request_new()
3966 	elr->lr_first_not_zeroed = start;  in ext4_li_request_new()
3968 		elr->lr_mode = EXT4_LI_MODE_ITABLE;  in ext4_li_request_new()
3969 		elr->lr_next_group = start;  in ext4_li_request_new()
3971 		elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP;  in ext4_li_request_new()
3979 	elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);  in ext4_li_request_new()
3988 	ext4_group_t ngroups = sbi->s_groups_count;  in ext4_register_li_request()
3992 	if (sbi->s_li_request != NULL) {  in ext4_register_li_request()
3997 		sbi->s_li_request->lr_timeout = 0;  in ext4_register_li_request()
4008 		ret = -ENOMEM;  in ext4_register_li_request()
4018 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_register_li_request()
4019 	list_add(&elr->lr_request, &ext4_li_info->li_request_list);  in ext4_register_li_request()
4020 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_register_li_request()
4022 	sbi->s_li_request = elr;  in ext4_register_li_request()
4030 	if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) {  in ext4_register_li_request()
4074 	jbd2_journal_clear_features(sbi->s_journal,  in set_journal_csum_feature_set()
4079 		ret = jbd2_journal_set_features(sbi->s_journal,  in set_journal_csum_feature_set()
4084 		ret = jbd2_journal_set_features(sbi->s_journal,  in set_journal_csum_feature_set()
4087 		jbd2_journal_clear_features(sbi->s_journal, 0, 0,  in set_journal_csum_feature_set()
4090 		jbd2_journal_clear_features(sbi->s_journal, 0, 0,  in set_journal_csum_feature_set()
4105  * older file systems --- and if we come across with a bigalloc file
4107  * correct especially for very large cluster sizes --- but for newer
4110  * present (even for non-bigalloc file systems), we will use it.
4124 			(has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) +  in count_overhead()
4125 			sbi->s_itb_per_group + 2);  in count_overhead()
4127 	first_block = le32_to_cpu(sbi->s_es->s_first_data_block) +  in count_overhead()
4129 	last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1;  in count_overhead()
4134 			ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);  in count_overhead()
4139 			ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);  in count_overhead()
4143 		if (b >= first_block && b + sbi->s_itb_per_group <= last_block)  in count_overhead()
4144 			for (j = 0; j < sbi->s_itb_per_group; j++, b++) {  in count_overhead()
4145 				int c = EXT4_B2C(sbi, b - first_block);  in count_overhead()
4160 			j = EXT4_BLOCKS_PER_GROUP(sb) - s;  in count_overhead()
4163 		for (; j > 0; j--)  in count_overhead()
4168 	return EXT4_CLUSTERS_PER_GROUP(sb) -  in count_overhead()
4173  * Compute the overhead and stash it in sbi->s_overhead
4178 	struct ext4_super_block *es = sbi->s_es;  in ext4_calculate_overhead()  local
4180 	unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum);  in ext4_calculate_overhead()
4186 		return -ENOMEM;  in ext4_calculate_overhead()
4197 	overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block));  in ext4_calculate_overhead()
4216 	if (sbi->s_journal && !sbi->s_journal_bdev_file)  in ext4_calculate_overhead()
4217 		overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len);  in ext4_calculate_overhead()
4218 	else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {  in ext4_calculate_overhead()
4219 		/* j_inum for internal journal is non-zero */  in ext4_calculate_overhead()
4222 			j_blocks = j_inode->i_size >> sb->s_blocksize_bits;  in ext4_calculate_overhead()
4229 	sbi->s_overhead = overhead;  in ext4_calculate_overhead()
4256 	resv_clusters = (ext4_blocks_count(sbi->s_es) >>  in ext4_set_resv_clusters()
4257 			 sbi->s_cluster_bits);  in ext4_set_resv_clusters()
4262 	atomic64_set(&sbi->s_resv_clusters, resv_clusters);  in ext4_set_resv_clusters()
4271 	if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb))  in ext4_quota_mode()
4290 	sbi->s_journal_triggers[type].sb = sb;  in ext4_setup_csum_trigger()
4291 	sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger;  in ext4_setup_csum_trigger()
4299 	kfree(sbi->s_blockgroup_lock);  in ext4_free_sbi()
4300 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_free_sbi()
4312 	sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off,  in ext4_alloc_sbi()
4315 	sbi->s_blockgroup_lock =  in ext4_alloc_sbi()
4318 	if (!sbi->s_blockgroup_lock)  in ext4_alloc_sbi()
4321 	sb->s_fs_info = sbi;  in ext4_alloc_sbi()
4322 	sbi->s_sb = sb;  in ext4_alloc_sbi()
4325 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_alloc_sbi()
4331 			      struct ext4_super_block *es)  in ext4_set_def_opts()  argument
4336 	def_mount_opts = le32_to_cpu(es->s_default_mount_opts);  in ext4_set_def_opts()
4351 	/* don't forget to enable journal_csum when metadata_csum is enabled. */  in ext4_set_def_opts()
4362 	if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC)  in ext4_set_def_opts()
4364 	else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE)  in ext4_set_def_opts()
4377 	 * enable delayed allocation by default  in ext4_set_def_opts()
4378 	 * Use -o nodelalloc to turn it off  in ext4_set_def_opts()
4384 	if (sb->s_blocksize <= PAGE_SIZE)  in ext4_set_def_opts()
4391 	struct ext4_super_block *es = sbi->s_es;  in ext4_handle_clustersize()  local
4395 	clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size);  in ext4_handle_clustersize()
4397 		if (clustersize < sb->s_blocksize) {  in ext4_handle_clustersize()
4400 				 "block size (%lu)", clustersize, sb->s_blocksize);  in ext4_handle_clustersize()
4401 			return -EINVAL;  in ext4_handle_clustersize()
4403 		sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) -  in ext4_handle_clustersize()
4404 			le32_to_cpu(es->s_log_block_size);  in ext4_handle_clustersize()
4406 		if (clustersize != sb->s_blocksize) {  in ext4_handle_clustersize()
4409 				 "block size (%lu)", clustersize, sb->s_blocksize);  in ext4_handle_clustersize()
4410 			return -EINVAL;  in ext4_handle_clustersize()
4412 		if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {  in ext4_handle_clustersize()
4415 				 sbi->s_blocks_per_group);  in ext4_handle_clustersize()
4416 			return -EINVAL;  in ext4_handle_clustersize()
4418 		sbi->s_cluster_bits = 0;  in ext4_handle_clustersize()
4420 	sbi->s_clusters_per_group = le32_to_cpu(es->s_clusters_per_group);  in ext4_handle_clustersize()
4421 	if (sbi->s_clusters_per_group > sb->s_blocksize * 8) {  in ext4_handle_clustersize()
4423 			 sbi->s_clusters_per_group);  in ext4_handle_clustersize()
4424 		return -EINVAL;  in ext4_handle_clustersize()
4426 	if (sbi->s_blocks_per_group !=  in ext4_handle_clustersize()
4427 	    (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) {  in ext4_handle_clustersize()
4430 			 sbi->s_blocks_per_group, sbi->s_clusters_per_group);  in ext4_handle_clustersize()
4431 		return -EINVAL;  in ext4_handle_clustersize()
4433 	sbi->s_cluster_ratio = clustersize / sb->s_blocksize;  in ext4_handle_clustersize()
4436 	if (sbi->s_blocks_per_group == clustersize << 3)  in ext4_handle_clustersize()
4450 	struct block_device *bdev = sb->s_bdev;  in ext4_atomic_write_init()
4458 	sbi->s_awu_min = max(sb->s_blocksize,  in ext4_atomic_write_init()
4460 	sbi->s_awu_max = min(sb->s_blocksize,  in ext4_atomic_write_init()
4462 	if (sbi->s_awu_min && sbi->s_awu_max &&  in ext4_atomic_write_init()
4463 	    sbi->s_awu_min <= sbi->s_awu_max) {  in ext4_atomic_write_init()
4465 			 sbi->s_awu_min, sbi->s_awu_max);  in ext4_atomic_write_init()
4467 		sbi->s_awu_min = 0;  in ext4_atomic_write_init()
4468 		sbi->s_awu_max = 0;  in ext4_atomic_write_init()
4477 	atomic_set(&sbi->s_fc_subtid, 0);  in ext4_fast_commit_init()
4478 	INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);  in ext4_fast_commit_init()
4479 	INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);  in ext4_fast_commit_init()
4480 	INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);  in ext4_fast_commit_init()
4481 	INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);  in ext4_fast_commit_init()
4482 	sbi->s_fc_bytes = 0;  in ext4_fast_commit_init()
4484 	sbi->s_fc_ineligible_tid = 0;  in ext4_fast_commit_init()
4485 	spin_lock_init(&sbi->s_fc_lock);  in ext4_fast_commit_init()
4486 	memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats));  in ext4_fast_commit_init()
4487 	sbi->s_fc_replay_state.fc_regions = NULL;  in ext4_fast_commit_init()
4488 	sbi->s_fc_replay_state.fc_regions_size = 0;  in ext4_fast_commit_init()
4489 	sbi->s_fc_replay_state.fc_regions_used = 0;  in ext4_fast_commit_init()
4490 	sbi->s_fc_replay_state.fc_regions_valid = 0;  in ext4_fast_commit_init()
4491 	sbi->s_fc_replay_state.fc_modified_inodes = NULL;  in ext4_fast_commit_init()
4492 	sbi->s_fc_replay_state.fc_modified_inodes_size = 0;  in ext4_fast_commit_init()
4493 	sbi->s_fc_replay_state.fc_modified_inodes_used = 0;  in ext4_fast_commit_init()
4497 				struct ext4_super_block *es)  in ext4_inode_info_init()  argument
4501 	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {  in ext4_inode_info_init()
4502 		sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;  in ext4_inode_info_init()
4503 		sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;  in ext4_inode_info_init()
4505 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);  in ext4_inode_info_init()
4506 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);  in ext4_inode_info_init()
4507 		if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) {  in ext4_inode_info_init()
4509 				 sbi->s_first_ino);  in ext4_inode_info_init()
4510 			return -EINVAL;  in ext4_inode_info_init()
4512 		if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||  in ext4_inode_info_init()
4513 		    (!is_power_of_2(sbi->s_inode_size)) ||  in ext4_inode_info_init()
4514 		    (sbi->s_inode_size > sb->s_blocksize)) {  in ext4_inode_info_init()
4517 			       sbi->s_inode_size);  in ext4_inode_info_init()
4518 			ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize);  in ext4_inode_info_init()
4519 			return -EINVAL;  in ext4_inode_info_init()
4527 		if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +  in ext4_inode_info_init()
4528 			sizeof(((struct ext4_inode *)0)->i_atime_extra)) {  in ext4_inode_info_init()
4529 			sb->s_time_gran = 1;  in ext4_inode_info_init()
4530 			sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;  in ext4_inode_info_init()
4532 			sb->s_time_gran = NSEC_PER_SEC;  in ext4_inode_info_init()
4533 			sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;  in ext4_inode_info_init()
4535 		sb->s_time_min = EXT4_TIMESTAMP_MIN;  in ext4_inode_info_init()
4538 	if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {  in ext4_inode_info_init()
4539 		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -  in ext4_inode_info_init()
4542 			unsigned v, max = (sbi->s_inode_size -  in ext4_inode_info_init()
4545 			v = le16_to_cpu(es->s_want_extra_isize);  in ext4_inode_info_init()
4549 				return -EINVAL;  in ext4_inode_info_init()
4551 			if (sbi->s_want_extra_isize < v)  in ext4_inode_info_init()
4552 				sbi->s_want_extra_isize = v;  in ext4_inode_info_init()
4554 			v = le16_to_cpu(es->s_min_extra_isize);  in ext4_inode_info_init()
4558 				return -EINVAL;  in ext4_inode_info_init()
4560 			if (sbi->s_want_extra_isize < v)  in ext4_inode_info_init()
4561 				sbi->s_want_extra_isize = v;  in ext4_inode_info_init()
4569 static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)  in ext4_encoding_init()  argument
4573 	__u16 encoding_flags = le16_to_cpu(es->s_encoding_flags);  in ext4_encoding_init()
4575 	if (!ext4_has_feature_casefold(sb) || sb->s_encoding)  in ext4_encoding_init()
4578 	encoding_info = ext4_sb_read_encoding(es);  in ext4_encoding_init()
4582 		return -EINVAL;  in ext4_encoding_init()
4585 	encoding = utf8_load(encoding_info->version);  in ext4_encoding_init()
4588 			"can't mount with superblock charset: %s-%u.%u.%u "  in ext4_encoding_init()
4590 			encoding_info->name,  in ext4_encoding_init()
4591 			unicode_major(encoding_info->version),  in ext4_encoding_init()
4592 			unicode_minor(encoding_info->version),  in ext4_encoding_init()
4593 			unicode_rev(encoding_info->version),  in ext4_encoding_init()
4595 		return -EINVAL;  in ext4_encoding_init()
4598 		"%s-%u.%u.%u with flags 0x%hx", encoding_info->name,  in ext4_encoding_init()
4599 		unicode_major(encoding_info->version),  in ext4_encoding_init()
4600 		unicode_minor(encoding_info->version),  in ext4_encoding_init()
4601 		unicode_rev(encoding_info->version),  in ext4_encoding_init()
4604 	sb->s_encoding = encoding;  in ext4_encoding_init()
4605 	sb->s_encoding_flags = encoding_flags;  in ext4_encoding_init()
4610 static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)  in ext4_encoding_init()  argument
4616 static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es)  in ext4_init_metadata_csum()  argument
4627 	if (!ext4_verify_csum_type(sb, es)) {  in ext4_init_metadata_csum()
4630 		return -EINVAL;  in ext4_init_metadata_csum()
4636 	if (!ext4_superblock_csum_verify(sb, es)) {  in ext4_init_metadata_csum()
4639 		return -EFSBADCRC;  in ext4_init_metadata_csum()
4644 		sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed);  in ext4_init_metadata_csum()
4646 		sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,  in ext4_init_metadata_csum()
4647 					       sizeof(es->s_uuid));  in ext4_init_metadata_csum()
4652 					    struct ext4_super_block *es,  in ext4_check_feature_compatibility()  argument
4657 	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV &&  in ext4_check_feature_compatibility()
4665 	if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) {  in ext4_check_feature_compatibility()
4669 				 "The Hurd can't support 64-bit file systems");  in ext4_check_feature_compatibility()
4670 			return -EINVAL;  in ext4_check_feature_compatibility()
4680 			return -EINVAL;  in ext4_check_feature_compatibility()
4694 				return -EINVAL;  in ext4_check_feature_compatibility()
4697 			return -EINVAL;  in ext4_check_feature_compatibility()
4711 				return -EINVAL;  in ext4_check_feature_compatibility()
4714 			return -EINVAL;  in ext4_check_feature_compatibility()
4724 		return -EINVAL;  in ext4_check_feature_compatibility()
4726 	if (sbi->s_daxdev) {  in ext4_check_feature_compatibility()
4727 		if (sb->s_blocksize == PAGE_SIZE)  in ext4_check_feature_compatibility()
4728 			set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);  in ext4_check_feature_compatibility()
4733 	if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {  in ext4_check_feature_compatibility()
4737 			return -EINVAL;  in ext4_check_feature_compatibility()
4739 		if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) {  in ext4_check_feature_compatibility()
4742 			return -EINVAL;  in ext4_check_feature_compatibility()
4746 	if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {  in ext4_check_feature_compatibility()
4748 			 es->s_encryption_level);  in ext4_check_feature_compatibility()
4749 		return -EINVAL;  in ext4_check_feature_compatibility()
4756 			       struct ext4_super_block *es)  in ext4_check_geometry()  argument
4762 	if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) {  in ext4_check_geometry()
4765 			 le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks));  in ext4_check_geometry()
4766 		return -EINVAL;  in ext4_check_geometry()
4772 	err = generic_check_addressable(sb->s_blocksize_bits,  in ext4_check_geometry()
4773 					ext4_blocks_count(es));  in ext4_check_geometry()
4782 	if (blocks_count && ext4_blocks_count(es) > blocks_count) {  in ext4_check_geometry()
4785 		       ext4_blocks_count(es), blocks_count);  in ext4_check_geometry()
4786 		return -EINVAL;  in ext4_check_geometry()
4793 	if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) {  in ext4_check_geometry()
4796 			 le32_to_cpu(es->s_first_data_block),  in ext4_check_geometry()
4797 			 ext4_blocks_count(es));  in ext4_check_geometry()
4798 		return -EINVAL;  in ext4_check_geometry()
4800 	if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) &&  in ext4_check_geometry()
4801 	    (sbi->s_cluster_ratio == 1)) {  in ext4_check_geometry()
4804 		return -EINVAL;  in ext4_check_geometry()
4807 	blocks_count = (ext4_blocks_count(es) -  in ext4_check_geometry()
4808 			le32_to_cpu(es->s_first_data_block) +  in ext4_check_geometry()
4809 			EXT4_BLOCKS_PER_GROUP(sb) - 1);  in ext4_check_geometry()
4811 	if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) {  in ext4_check_geometry()
4815 		       ext4_blocks_count(es),  in ext4_check_geometry()
4816 		       le32_to_cpu(es->s_first_data_block),  in ext4_check_geometry()
4818 		return -EINVAL;  in ext4_check_geometry()
4820 	sbi->s_groups_count = blocks_count;  in ext4_check_geometry()
4821 	sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,  in ext4_check_geometry()
4823 	if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) !=  in ext4_check_geometry()
4824 	    le32_to_cpu(es->s_inodes_count)) {  in ext4_check_geometry()
4826 			 le32_to_cpu(es->s_inodes_count),  in ext4_check_geometry()
4827 			 ((u64)sbi->s_groups_count * sbi->s_inodes_per_group));  in ext4_check_geometry()
4828 		return -EINVAL;  in ext4_check_geometry()
4835 				struct ext4_super_block *es,  in ext4_group_desc_init()  argument
4844 	db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /  in ext4_group_desc_init()
4847 		if (le32_to_cpu(es->s_first_meta_bg) > db_count) {  in ext4_group_desc_init()
4851 				 le32_to_cpu(es->s_first_meta_bg), db_count);  in ext4_group_desc_init()
4852 			return -EINVAL;  in ext4_group_desc_init()
4855 	rcu_assign_pointer(sbi->s_group_desc,  in ext4_group_desc_init()
4859 	if (sbi->s_group_desc == NULL) {  in ext4_group_desc_init()
4861 		return -ENOMEM;  in ext4_group_desc_init()
4864 	bgl_lock_init(sbi->s_blockgroup_lock);  in ext4_group_desc_init()
4866 	/* Pre-read the descriptors into the buffer cache */  in ext4_group_desc_init()
4880 			sbi->s_gdb_count = i;  in ext4_group_desc_init()
4884 		rcu_dereference(sbi->s_group_desc)[i] = bh;  in ext4_group_desc_init()
4887 	sbi->s_gdb_count = db_count;  in ext4_group_desc_init()
4890 		return -EFSCORRUPTED;  in ext4_group_desc_init()
4897 				      struct ext4_super_block *es,  in ext4_load_and_init_journal()  argument
4903 	err = ext4_load_journal(sb, es, ctx->journal_devnum);  in ext4_load_and_init_journal()
4908 	    !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,  in ext4_load_and_init_journal()
4910 		ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");  in ext4_load_and_init_journal()
4921 		!jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,  in ext4_load_and_init_journal()
4937 		    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {  in ext4_load_and_init_journal()
4939 			sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;  in ext4_load_and_init_journal()
4942 			sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;  in ext4_load_and_init_journal()
4949 		    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {  in ext4_load_and_init_journal()
4966 	set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);  in ext4_load_and_init_journal()
4968 	sbi->s_journal->j_submit_inode_data_buffers =  in ext4_load_and_init_journal()
4970 	sbi->s_journal->j_finish_inode_data_buffers =  in ext4_load_and_init_journal()
4977 	flush_work(&sbi->s_sb_upd_work);  in ext4_load_and_init_journal()
4978 	jbd2_journal_destroy(sbi->s_journal);  in ext4_load_and_init_journal()
4979 	sbi->s_journal = NULL;  in ext4_load_and_init_journal()
4980 	return -EINVAL;  in ext4_load_and_init_journal()
4986 		printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with "  in ext4_check_journal_data_mode()
4995 			return -EINVAL;  in ext4_check_journal_data_mode()
5000 			return -EINVAL;  in ext4_check_journal_data_mode()
5010 		sb->s_iflags |= SB_I_CGROUPWB;  in ext4_check_journal_data_mode()
5020 	struct ext4_super_block *es;  in ext4_load_super()  local
5024 	int ret = -EINVAL;  in ext4_load_super()
5030 		return -EINVAL;  in ext4_load_super()
5038 		logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;  in ext4_load_super()
5041 		logical_sb_block = sbi->s_sb_block;  in ext4_load_super()
5051 	 *       some ext4 macro-instructions depend on its value  in ext4_load_super()
5053 	es = (struct ext4_super_block *) (bh->b_data + offset);  in ext4_load_super()
5054 	sbi->s_es = es;  in ext4_load_super()
5055 	sb->s_magic = le16_to_cpu(es->s_magic);  in ext4_load_super()
5056 	if (sb->s_magic != EXT4_SUPER_MAGIC) {  in ext4_load_super()
5062 	if (le32_to_cpu(es->s_log_block_size) >  in ext4_load_super()
5063 	    (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {  in ext4_load_super()
5066 			 le32_to_cpu(es->s_log_block_size));  in ext4_load_super()
5069 	if (le32_to_cpu(es->s_log_cluster_size) >  in ext4_load_super()
5070 	    (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {  in ext4_load_super()
5073 			 le32_to_cpu(es->s_log_cluster_size));  in ext4_load_super()
5077 	blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);  in ext4_load_super()
5083 	if (sb->s_blocksize == blocksize) {  in ext4_load_super()
5085 		sbi->s_sbh = bh;  in ext4_load_super()
5103 	logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;  in ext4_load_super()
5112 	es = (struct ext4_super_block *)(bh->b_data + offset);  in ext4_load_super()
5113 	sbi->s_es = es;  in ext4_load_super()
5114 	if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {  in ext4_load_super()
5119 	sbi->s_sbh = bh;  in ext4_load_super()
5129 	struct ext4_super_block *es = sbi->s_es;  in ext4_hash_info_init()  local
5132 	sbi->s_def_hash_version = es->s_def_hash_version;  in ext4_hash_info_init()
5134 	if (sbi->s_def_hash_version > DX_HASH_LAST) {  in ext4_hash_info_init()
5137 		return -EINVAL;  in ext4_hash_info_init()
5138 	} else if (sbi->s_def_hash_version == DX_HASH_SIPHASH) {  in ext4_hash_info_init()
5141 		return -EINVAL;  in ext4_hash_info_init()
5145 		sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);  in ext4_hash_info_init()
5148 		i = le32_to_cpu(es->s_flags);  in ext4_hash_info_init()
5150 			sbi->s_hash_unsigned = 3;  in ext4_hash_info_init()
5154 				es->s_flags |=  in ext4_hash_info_init()
5156 			sbi->s_hash_unsigned = 3;  in ext4_hash_info_init()
5159 				es->s_flags |=  in ext4_hash_info_init()
5170 	struct ext4_super_block *es = sbi->s_es;  in ext4_block_group_meta_init()  local
5174 	sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,  in ext4_block_group_meta_init()
5176 	sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);  in ext4_block_group_meta_init()
5178 	sbi->s_desc_size = le16_to_cpu(es->s_desc_size);  in ext4_block_group_meta_init()
5180 		if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||  in ext4_block_group_meta_init()
5181 		    sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||  in ext4_block_group_meta_init()
5182 		    !is_power_of_2(sbi->s_desc_size)) {  in ext4_block_group_meta_init()
5185 			       sbi->s_desc_size);  in ext4_block_group_meta_init()
5186 			return -EINVAL;  in ext4_block_group_meta_init()
5189 		sbi->s_desc_size = EXT4_MIN_DESC_SIZE;  in ext4_block_group_meta_init()
5191 	sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);  in ext4_block_group_meta_init()
5192 	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);  in ext4_block_group_meta_init()
5194 	sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb);  in ext4_block_group_meta_init()
5195 	if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {  in ext4_block_group_meta_init()
5198 		return -EINVAL;  in ext4_block_group_meta_init()
5200 	if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||  in ext4_block_group_meta_init()
5201 	    sbi->s_inodes_per_group > sb->s_blocksize * 8) {  in ext4_block_group_meta_init()
5203 			 sbi->s_inodes_per_group);  in ext4_block_group_meta_init()
5204 		return -EINVAL;  in ext4_block_group_meta_init()
5206 	sbi->s_itb_per_group = sbi->s_inodes_per_group /  in ext4_block_group_meta_init()
5207 					sbi->s_inodes_per_block;  in ext4_block_group_meta_init()
5208 	sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb);  in ext4_block_group_meta_init()
5209 	sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY;  in ext4_block_group_meta_init()
5210 	sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));  in ext4_block_group_meta_init()
5211 	sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));  in ext4_block_group_meta_init()
5224 	return (stripe > 0 && sbi->s_cluster_ratio > 1 &&  in ext4_is_stripe_incompatible()
5225 		stripe % sbi->s_cluster_ratio != 0);  in ext4_is_stripe_incompatible()
5230 	struct ext4_super_block *es = NULL;  in __ext4_fill_super()  local
5237 	struct ext4_fs_context *ctx = fc->fs_private;  in __ext4_fill_super()
5238 	int silent = fc->sb_flags & SB_SILENT;  in __ext4_fill_super()
5241 	if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO))  in __ext4_fill_super()
5242 		ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;  in __ext4_fill_super()
5244 	sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;  in __ext4_fill_super()
5245 	sbi->s_sectors_written_start =  in __ext4_fill_super()
5246 		part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);  in __ext4_fill_super()
5252 	es = sbi->s_es;  in __ext4_fill_super()
5253 	sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);  in __ext4_fill_super()
5255 	err = ext4_init_metadata_csum(sb, es);  in __ext4_fill_super()
5259 	ext4_set_def_opts(sb, es);  in __ext4_fill_super()
5261 	sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));  in __ext4_fill_super()
5262 	sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));  in __ext4_fill_super()
5263 	sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ;  in __ext4_fill_super()
5264 	sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;  in __ext4_fill_super()
5265 	sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;  in __ext4_fill_super()
5271 	sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;  in __ext4_fill_super()
5273 	err = ext4_inode_info_init(sb, es);  in __ext4_fill_super()
5281 	sbi->s_def_mount_opt = sbi->s_mount_opt;  in __ext4_fill_super()
5282 	sbi->s_def_mount_opt2 = sbi->s_mount_opt2;  in __ext4_fill_super()
5290 	err = ext4_encoding_init(sb, es);  in __ext4_fill_super()
5298 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in __ext4_fill_super()
5302 	sb->s_flags |= SB_I_VERSION;  in __ext4_fill_super()
5305 	sb->s_iflags |= SB_I_ALLOW_HSM;  in __ext4_fill_super()
5307 	err = ext4_check_feature_compatibility(sb, es, silent);  in __ext4_fill_super()
5323 	err = ext4_check_geometry(sb, es);  in __ext4_fill_super()
5327 	timer_setup(&sbi->s_err_report, print_daily_error_info, 0);  in __ext4_fill_super()
5328 	spin_lock_init(&sbi->s_error_lock);  in __ext4_fill_super()
5329 	INIT_WORK(&sbi->s_sb_upd_work, update_super_work);  in __ext4_fill_super()
5331 	err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed);  in __ext4_fill_super()
5339 	sbi->s_stripe = ext4_get_stripe_size(sbi);  in __ext4_fill_super()
5340 	if (ext4_is_stripe_incompatible(sb, sbi->s_stripe)) {  in __ext4_fill_super()
5344 			 sbi->s_stripe, sbi->s_cluster_ratio);  in __ext4_fill_super()
5345 		sbi->s_stripe = 0;  in __ext4_fill_super()
5347 	sbi->s_extent_max_zeroout_kb = 32;  in __ext4_fill_super()
5352 	sb->s_op = &ext4_sops;  in __ext4_fill_super()
5353 	sb->s_export_op = &ext4_export_ops;  in __ext4_fill_super()
5354 	sb->s_xattr = ext4_xattr_handlers;  in __ext4_fill_super()
5356 	sb->s_cop = &ext4_cryptops;  in __ext4_fill_super()
5359 	sb->s_vop = &ext4_verityops;  in __ext4_fill_super()
5362 	sb->dq_op = &ext4_quota_operations;  in __ext4_fill_super()
5364 		sb->s_qcop = &dquot_quotactl_sysfile_ops;  in __ext4_fill_super()
5366 		sb->s_qcop = &ext4_qctl_operations;  in __ext4_fill_super()
5367 	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;  in __ext4_fill_super()
5369 	super_set_uuid(sb, es->s_uuid, sizeof(es->s_uuid));  in __ext4_fill_super()
5372 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */  in __ext4_fill_super()
5373 	mutex_init(&sbi->s_orphan_lock);  in __ext4_fill_super()
5375 	spin_lock_init(&sbi->s_bdev_wb_lock);  in __ext4_fill_super()
5380 	sb->s_root = NULL;  in __ext4_fill_super()
5382 	needs_recovery = (es->s_last_orphan != 0 ||  in __ext4_fill_super()
5387 		err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block));  in __ext4_fill_super()
5392 	err = -EINVAL;  in __ext4_fill_super()
5398 		err = ext4_load_and_init_journal(sb, es, ctx);  in __ext4_fill_super()
5404 		       "suppressed and not mounted read-only");  in __ext4_fill_super()
5419 		if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {  in __ext4_fill_super()
5422 				 sbi->s_commit_interval / HZ);  in __ext4_fill_super()
5426 		    (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {  in __ext4_fill_super()
5431 		sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;  in __ext4_fill_super()
5435 		sbi->s_journal = NULL;  in __ext4_fill_super()
5440 		sbi->s_ea_block_cache = ext4_xattr_create_cache();  in __ext4_fill_super()
5441 		if (!sbi->s_ea_block_cache) {  in __ext4_fill_super()
5444 			err = -EINVAL;  in __ext4_fill_super()
5449 			sbi->s_ea_inode_cache = ext4_xattr_create_cache();  in __ext4_fill_super()
5450 			if (!sbi->s_ea_inode_cache) {  in __ext4_fill_super()
5453 				err = -EINVAL;  in __ext4_fill_super()
5463 	sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters);  in __ext4_fill_super()
5465 	if (sbi->s_overhead > ext4_blocks_count(es))  in __ext4_fill_super()
5466 		sbi->s_overhead = 0;  in __ext4_fill_super()
5473 		sbi->s_overhead = 0;  in __ext4_fill_super()
5474 	if (sbi->s_overhead == 0) {  in __ext4_fill_super()
5484 	EXT4_SB(sb)->rsv_conversion_wq =  in __ext4_fill_super()
5485 		alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);  in __ext4_fill_super()
5486 	if (!EXT4_SB(sb)->rsv_conversion_wq) {  in __ext4_fill_super()
5487 		printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");  in __ext4_fill_super()
5488 		err = -ENOMEM;  in __ext4_fill_super()
5504 	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {  in __ext4_fill_super()
5507 		err = -EFSCORRUPTED;  in __ext4_fill_super()
5512 	sb->s_root = d_make_root(root);  in __ext4_fill_super()
5513 	if (!sb->s_root) {  in __ext4_fill_super()
5515 		err = -ENOMEM;  in __ext4_fill_super()
5519 	err = ext4_setup_super(sb, es, sb_rdonly(sb));  in __ext4_fill_super()
5520 	if (err == -EROFS) {  in __ext4_fill_super()
5521 		sb->s_flags |= SB_RDONLY;  in __ext4_fill_super()
5540 	 * Enable optimize_scan if number of groups is > threshold. This can be  in __ext4_fill_super()
5544 	if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) {  in __ext4_fill_super()
5545 		if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD)  in __ext4_fill_super()
5562 	if (sbi->s_journal)  in __ext4_fill_super()
5563 		sbi->s_journal->j_commit_callback =  in __ext4_fill_super()
5575 			err = -ENOMEM;  in __ext4_fill_super()
5587 	/* Enable quota usage during mount. */  in __ext4_fill_super()
5599 	errseq_check_and_advance(&sb->s_bdev->bd_mapping->wb_err,  in __ext4_fill_super()
5600 				 &sbi->s_bdev_wb_err);  in __ext4_fill_super()
5601 	EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;  in __ext4_fill_super()
5602 	ext4_orphan_cleanup(sb, es);  in __ext4_fill_super()
5603 	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;  in __ext4_fill_super()
5614 		err = ext4_mark_recovery_complete(sb, es);  in __ext4_fill_super()
5619 	if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev))  in __ext4_fill_super()
5623 	if (es->s_error_count)  in __ext4_fill_super()
5624 		mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */  in __ext4_fill_super()
5626 	/* Enable message ratelimiting. Default is 10 messages per 5 secs. */  in __ext4_fill_super()
5627 	ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5628 	ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5629 	ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5630 	atomic_set(&sbi->s_warning_count, 0);  in __ext4_fill_super()
5631 	atomic_set(&sbi->s_msg_count, 0);  in __ext4_fill_super()
5654 	dput(sb->s_root);  in __ext4_fill_super()
5655 	sb->s_root = NULL;  in __ext4_fill_super()
5658 	if (EXT4_SB(sb)->rsv_conversion_wq)  in __ext4_fill_super()
5659 		destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);  in __ext4_fill_super()
5661 	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);  in __ext4_fill_super()
5662 	sbi->s_ea_inode_cache = NULL;  in __ext4_fill_super()
5664 	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);  in __ext4_fill_super()
5665 	sbi->s_ea_block_cache = NULL;  in __ext4_fill_super()
5667 	if (sbi->s_journal) {  in __ext4_fill_super()
5669 		flush_work(&sbi->s_sb_upd_work);  in __ext4_fill_super()
5670 		jbd2_journal_destroy(sbi->s_journal);  in __ext4_fill_super()
5671 		sbi->s_journal = NULL;  in __ext4_fill_super()
5677 	flush_work(&sbi->s_sb_upd_work);  in __ext4_fill_super()
5679 	del_timer_sync(&sbi->s_err_report);  in __ext4_fill_super()
5683 	utf8_unload(sb->s_encoding);  in __ext4_fill_super()
5690 	fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);  in __ext4_fill_super()
5691 	brelse(sbi->s_sbh);  in __ext4_fill_super()
5692 	if (sbi->s_journal_bdev_file) {  in __ext4_fill_super()
5693 		invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));  in __ext4_fill_super()
5694 		bdev_fput(sbi->s_journal_bdev_file);  in __ext4_fill_super()
5697 	invalidate_bdev(sb->s_bdev);  in __ext4_fill_super()
5698 	sb->s_fs_info = NULL;  in __ext4_fill_super()
5704 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_fill_super()
5711 		return -ENOMEM;  in ext4_fill_super()
5713 	fc->s_fs_info = sbi;  in ext4_fill_super()
5716 	strreplace(sb->s_id, '/', '!');  in ext4_fill_super()
5718 	sbi->s_sb_block = 1;	/* Default super block location */  in ext4_fill_super()
5719 	if (ctx->spec & EXT4_SPEC_s_sb_block)  in ext4_fill_super()
5720 		sbi->s_sb_block = ctx->s_sb_block;  in ext4_fill_super()
5726 	if (sbi->s_journal) {  in ext4_fill_super()
5736 	if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))  in ext4_fill_super()
5738 			 "Quota mode: %s.", &sb->s_uuid,  in ext4_fill_super()
5748 	fc->s_fs_info = NULL;  in ext4_fill_super()
5758  * Setup any per-fs journal parameters now.  We'll do this both on
5766 	journal->j_commit_interval = sbi->s_commit_interval;  in ext4_init_journal_params()
5767 	journal->j_min_batch_time = sbi->s_min_batch_time;  in ext4_init_journal_params()
5768 	journal->j_max_batch_time = sbi->s_max_batch_time;  in ext4_init_journal_params()
5771 	write_lock(&journal->j_state_lock);  in ext4_init_journal_params()
5773 		journal->j_flags |= JBD2_BARRIER;  in ext4_init_journal_params()
5775 		journal->j_flags &= ~JBD2_BARRIER;  in ext4_init_journal_params()
5777 		journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR;  in ext4_init_journal_params()
5779 		journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR;  in ext4_init_journal_params()
5781 	 * Always enable journal cycle record option, letting the journal  in ext4_init_journal_params()
5784 	journal->j_flags |= JBD2_CYCLE_RECORD;  in ext4_init_journal_params()
5785 	write_unlock(&journal->j_state_lock);  in ext4_init_journal_params()
5803 	if (!journal_inode->i_nlink) {  in ext4_get_journal_inode()
5807 		return ERR_PTR(-EFSCORRUPTED);  in ext4_get_journal_inode()
5809 	if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) {  in ext4_get_journal_inode()
5812 		return ERR_PTR(-EFSCORRUPTED);  in ext4_get_journal_inode()
5816 		  journal_inode, journal_inode->i_size);  in ext4_get_journal_inode()
5825 	if (journal->j_inode == NULL)  in ext4_journal_bmap()
5830 	ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0);  in ext4_journal_bmap()
5832 		ext4_msg(journal->j_inode->i_sb, KERN_CRIT,  in ext4_journal_bmap()
5835 		jbd2_journal_abort(journal, ret ? ret : -EIO);  in ext4_journal_bmap()
5858 	journal->j_private = sb;  in ext4_open_inode_journal()
5859 	journal->j_bmap = ext4_journal_bmap;  in ext4_open_inode_journal()
5874 	struct ext4_super_block *es;  in ext4_get_journal_blkdev()  local
5882 			 "failed to open journal device unknown-block(%u,%u) %ld",  in ext4_get_journal_blkdev()
5888 	blocksize = sb->s_blocksize;  in ext4_get_journal_blkdev()
5893 		errno = -EINVAL;  in ext4_get_journal_blkdev()
5904 		errno = -EINVAL;  in ext4_get_journal_blkdev()
5908 	es = (struct ext4_super_block *) (bh->b_data + offset);  in ext4_get_journal_blkdev()
5909 	if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) ||  in ext4_get_journal_blkdev()
5910 	    !(le32_to_cpu(es->s_feature_incompat) &  in ext4_get_journal_blkdev()
5913 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5917 	if ((le32_to_cpu(es->s_feature_ro_compat) &  in ext4_get_journal_blkdev()
5919 	    es->s_checksum != ext4_superblock_csum(sb, es)) {  in ext4_get_journal_blkdev()
5921 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5925 	if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {  in ext4_get_journal_blkdev()
5927 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5932 	*j_len = ext4_blocks_count(es);  in ext4_get_journal_blkdev()
5956 	journal = jbd2_journal_init_dev(file_bdev(bdev_file), sb->s_bdev, j_start,  in ext4_open_dev_journal()
5957 					j_len, sb->s_blocksize);  in ext4_open_dev_journal()
5963 	if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {  in ext4_open_dev_journal()
5965 					"user (unsupported) - %d",  in ext4_open_dev_journal()
5966 			be32_to_cpu(journal->j_superblock->s_nr_users));  in ext4_open_dev_journal()
5967 		errno = -EINVAL;  in ext4_open_dev_journal()
5970 	journal->j_private = sb;  in ext4_open_dev_journal()
5971 	EXT4_SB(sb)->s_journal_bdev_file = bdev_file;  in ext4_open_dev_journal()
5983 			     struct ext4_super_block *es,  in ext4_load_journal()  argument
5987 	unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);  in ext4_load_journal()
5994 		return -EFSCORRUPTED;  in ext4_load_journal()
5997 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {  in ext4_load_journal()
6002 		journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));  in ext4_load_journal()
6007 		return -EINVAL;  in ext4_load_journal()
6020 	journal_dev_ro = bdev_read_only(journal->j_dev);  in ext4_load_journal()
6021 	really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro;  in ext4_load_journal()
6025 			 "journal device read-only, try mounting with '-o ro'");  in ext4_load_journal()
6026 		err = -EROFS;  in ext4_load_journal()
6033 	 * can get read-write access to the device.  in ext4_load_journal()
6043 				err = -EROFS;  in ext4_load_journal()
6051 	if (!(journal->j_flags & JBD2_BARRIER))  in ext4_load_journal()
6062 			memcpy(save, ((char *) es) +  in ext4_load_journal()
6065 		if (save && memcmp(((char *) es) + EXT4_S_ERR_START,  in ext4_load_journal()
6067 			memcpy(((char *) es) + EXT4_S_ERR_START,  in ext4_load_journal()
6072 		orig_state = es->s_state;  in ext4_load_journal()
6073 		es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state &  in ext4_load_journal()
6075 		if (orig_state != es->s_state)  in ext4_load_journal()
6090 	EXT4_SB(sb)->s_journal = journal;  in ext4_load_journal()
6091 	err = ext4_clear_journal_err(sb, es);  in ext4_load_journal()
6093 		EXT4_SB(sb)->s_journal = NULL;  in ext4_load_journal()
6099 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {  in ext4_load_journal()
6100 		es->s_journal_dev = cpu_to_le32(journal_devnum);  in ext4_load_journal()
6104 	    journal_inum != le32_to_cpu(es->s_journal_inum)) {  in ext4_load_journal()
6105 		es->s_journal_inum = cpu_to_le32(journal_inum);  in ext4_load_journal()
6116 /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */
6120 	struct ext4_super_block *es = sbi->s_es;  in ext4_update_super()  local
6121 	struct buffer_head *sbh = sbi->s_sbh;  in ext4_update_super()
6125 	 * If the file system is mounted read-only, don't update the  in ext4_update_super()
6130 	 * tick in localtime for Windows bug-for-bug compatibility,  in ext4_update_super()
6135 		ext4_update_tstamp(es, s_wtime);  in ext4_update_super()
6136 	es->s_kbytes_written =  in ext4_update_super()
6137 		cpu_to_le64(sbi->s_kbytes_written +  in ext4_update_super()
6138 		    ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -  in ext4_update_super()
6139 		      sbi->s_sectors_written_start) >> 1));  in ext4_update_super()
6140 	if (percpu_counter_initialized(&sbi->s_freeclusters_counter))  in ext4_update_super()
6141 		ext4_free_blocks_count_set(es,  in ext4_update_super()
6143 				&sbi->s_freeclusters_counter)));  in ext4_update_super()
6144 	if (percpu_counter_initialized(&sbi->s_freeinodes_counter))  in ext4_update_super()
6145 		es->s_free_inodes_count =  in ext4_update_super()
6147 				&sbi->s_freeinodes_counter));  in ext4_update_super()
6148 	/* Copy error information to the on-disk superblock */  in ext4_update_super()
6149 	spin_lock(&sbi->s_error_lock);  in ext4_update_super()
6150 	if (sbi->s_add_error_count > 0) {  in ext4_update_super()
6151 		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);  in ext4_update_super()
6152 		if (!es->s_first_error_time && !es->s_first_error_time_hi) {  in ext4_update_super()
6153 			__ext4_update_tstamp(&es->s_first_error_time,  in ext4_update_super()
6154 					     &es->s_first_error_time_hi,  in ext4_update_super()
6155 					     sbi->s_first_error_time);  in ext4_update_super()
6156 			strtomem_pad(es->s_first_error_func,  in ext4_update_super()
6157 				     sbi->s_first_error_func, 0);  in ext4_update_super()
6158 			es->s_first_error_line =  in ext4_update_super()
6159 				cpu_to_le32(sbi->s_first_error_line);  in ext4_update_super()
6160 			es->s_first_error_ino =  in ext4_update_super()
6161 				cpu_to_le32(sbi->s_first_error_ino);  in ext4_update_super()
6162 			es->s_first_error_block =  in ext4_update_super()
6163 				cpu_to_le64(sbi->s_first_error_block);  in ext4_update_super()
6164 			es->s_first_error_errcode =  in ext4_update_super()
6165 				ext4_errno_to_code(sbi->s_first_error_code);  in ext4_update_super()
6167 		__ext4_update_tstamp(&es->s_last_error_time,  in ext4_update_super()
6168 				     &es->s_last_error_time_hi,  in ext4_update_super()
6169 				     sbi->s_last_error_time);  in ext4_update_super()
6170 		strtomem_pad(es->s_last_error_func, sbi->s_last_error_func, 0);  in ext4_update_super()
6171 		es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line);  in ext4_update_super()
6172 		es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino);  in ext4_update_super()
6173 		es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block);  in ext4_update_super()
6174 		es->s_last_error_errcode =  in ext4_update_super()
6175 				ext4_errno_to_code(sbi->s_last_error_code);  in ext4_update_super()
6180 		if (!es->s_error_count)  in ext4_update_super()
6181 			mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);  in ext4_update_super()
6182 		le32_add_cpu(&es->s_error_count, sbi->s_add_error_count);  in ext4_update_super()
6183 		sbi->s_add_error_count = 0;  in ext4_update_super()
6185 	spin_unlock(&sbi->s_error_lock);  in ext4_update_super()
6193 	struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;  in ext4_commit_super()
6196 		return -EINVAL;  in ext4_commit_super()
6204 		return -EIO;  in ext4_commit_super()
6224 	sbh->b_end_io = end_buffer_write_sync;  in ext4_commit_super()
6233 		return -EIO;  in ext4_commit_super()
6244 				       struct ext4_super_block *es)  in ext4_mark_recovery_complete()  argument
6247 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_mark_recovery_complete()
6253 			return -EFSCORRUPTED;  in ext4_mark_recovery_complete()
6265 			ext4_error(sb, "Orphan file not empty on read-only fs.");  in ext4_mark_recovery_complete()
6266 			err = -EFSCORRUPTED;  in ext4_mark_recovery_complete()
6279  * If we are mounting (or read-write remounting) a filesystem whose journal
6284 				   struct ext4_super_block *es)  in ext4_clear_journal_err()  argument
6292 		return -EFSCORRUPTED;  in ext4_clear_journal_err()
6295 	journal = EXT4_SB(sb)->s_journal;  in ext4_clear_journal_err()
6310 		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in ext4_clear_journal_err()
6311 		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);  in ext4_clear_journal_err()
6329 	return ext4_journal_force_commit(EXT4_SB(sb)->s_journal);  in ext4_force_commit()
6340 		return -EIO;  in ext4_sync_fs()
6343 	flush_workqueue(sbi->rsv_conversion_wq);  in ext4_sync_fs()
6345 	 * Writeback quota in non-journalled quota case - journalled quota has  in ext4_sync_fs()
6348 	dquot_writeback_dquots(sb, -1);  in ext4_sync_fs()
6354 	if (sbi->s_journal) {  in ext4_sync_fs()
6355 		target = jbd2_get_latest_transaction(sbi->s_journal);  in ext4_sync_fs()
6356 		if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&  in ext4_sync_fs()
6357 		    !jbd2_trans_will_send_data_barrier(sbi->s_journal, target))  in ext4_sync_fs()
6360 		if (jbd2_journal_start_commit(sbi->s_journal, &target)) {  in ext4_sync_fs()
6362 				ret = jbd2_log_wait_commit(sbi->s_journal,  in ext4_sync_fs()
6369 		err = blkdev_issue_flush(sb->s_bdev);  in ext4_sync_fs()
6378  * LVM calls this function before a (read-only) snapshot is created.  This
6388 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_freeze()
6425 	if (EXT4_SB(sb)->s_journal) {  in ext4_unfreeze()
6454 	struct ext4_fs_context *ctx = fc->fs_private;  in __ext4_remount()
6455 	struct ext4_super_block *es;  in __ext4_remount()  local
6470 	old_sb_flags = sb->s_flags;  in __ext4_remount()
6471 	old_opts.s_mount_opt = sbi->s_mount_opt;  in __ext4_remount()
6472 	old_opts.s_mount_opt2 = sbi->s_mount_opt2;  in __ext4_remount()
6473 	old_opts.s_resuid = sbi->s_resuid;  in __ext4_remount()
6474 	old_opts.s_resgid = sbi->s_resgid;  in __ext4_remount()
6475 	old_opts.s_commit_interval = sbi->s_commit_interval;  in __ext4_remount()
6476 	old_opts.s_min_batch_time = sbi->s_min_batch_time;  in __ext4_remount()
6477 	old_opts.s_max_batch_time = sbi->s_max_batch_time;  in __ext4_remount()
6479 	old_opts.s_jquota_fmt = sbi->s_jquota_fmt;  in __ext4_remount()
6481 		if (sbi->s_qf_names[i]) {  in __ext4_remount()
6488 				return -ENOMEM;  in __ext4_remount()
6493 	if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) {  in __ext4_remount()
6494 		if (sbi->s_journal && sbi->s_journal->j_task->io_context)  in __ext4_remount()
6495 			ctx->journal_ioprio =  in __ext4_remount()
6496 				sbi->s_journal->j_task->io_context->ioprio;  in __ext4_remount()
6498 			ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;  in __ext4_remount()
6502 	if ((ctx->spec & EXT4_SPEC_s_stripe) &&  in __ext4_remount()
6503 	    ext4_is_stripe_incompatible(sb, ctx->s_stripe)) {  in __ext4_remount()
6507 			 ctx->s_stripe, sbi->s_cluster_ratio);  in __ext4_remount()
6508 		ctx->s_stripe = 0;  in __ext4_remount()
6526 		sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM;  in __ext4_remount()
6533 			err = -EINVAL;  in __ext4_remount()
6539 			err = -EINVAL;  in __ext4_remount()
6546 			err = -EINVAL;  in __ext4_remount()
6551 	if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) {  in __ext4_remount()
6552 		ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount");  in __ext4_remount()
6553 		err = -EINVAL;  in __ext4_remount()
6560 		err = -EINVAL;  in __ext4_remount()
6564 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in __ext4_remount()
6567 	es = sbi->s_es;  in __ext4_remount()
6569 	if (sbi->s_journal) {  in __ext4_remount()
6570 		ext4_init_journal_params(sb, sbi->s_journal);  in __ext4_remount()
6571 		set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);  in __ext4_remount()
6575 	flush_work(&sbi->s_sb_upd_work);  in __ext4_remount()
6577 	if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {  in __ext4_remount()
6579 			err = -EROFS;  in __ext4_remount()
6583 		if (fc->sb_flags & SB_RDONLY) {  in __ext4_remount()
6587 			err = dquot_suspend(sb, -1);  in __ext4_remount()
6595 			sb->s_flags |= SB_RDONLY;  in __ext4_remount()
6602 			if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) &&  in __ext4_remount()
6603 			    (sbi->s_mount_state & EXT4_VALID_FS))  in __ext4_remount()
6604 				es->s_state = cpu_to_le16(sbi->s_mount_state);  in __ext4_remount()
6606 			if (sbi->s_journal) {  in __ext4_remount()
6608 				 * We let remount-ro finish even if marking fs  in __ext4_remount()
6611 				ext4_mark_recovery_complete(sb, es);  in __ext4_remount()
6617 				err = -EROFS;  in __ext4_remount()
6624 			for (g = 0; g < sbi->s_groups_count; g++) {  in __ext4_remount()
6632 					       le16_to_cpu(gdp->bg_checksum));  in __ext4_remount()
6633 					err = -EFSBADCRC;  in __ext4_remount()
6643 			if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) {  in __ext4_remount()
6648 				err = -EINVAL;  in __ext4_remount()
6653 			 * Mounting a RDONLY partition read-write, so reread  in __ext4_remount()
6658 			if (sbi->s_journal) {  in __ext4_remount()
6659 				err = ext4_clear_journal_err(sb, es);  in __ext4_remount()
6663 			sbi->s_mount_state = (le16_to_cpu(es->s_state) &  in __ext4_remount()
6666 			err = ext4_setup_super(sb, es, 0);  in __ext4_remount()
6670 			sb->s_flags &= ~SB_RDONLY;  in __ext4_remount()
6673 						le64_to_cpu(es->s_mmp_block));  in __ext4_remount()
6688 	if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) {  in __ext4_remount()
6694 	if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) {  in __ext4_remount()
6703 			dquot_resume(sb, -1);  in __ext4_remount()
6714 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)  in __ext4_remount()
6745 	 * re-enable quota  in __ext4_remount()
6749 		dquot_resume(sb, -1);  in __ext4_remount()
6752 	sb->s_flags = old_sb_flags;  in __ext4_remount()
6753 	sbi->s_mount_opt = old_opts.s_mount_opt;  in __ext4_remount()
6754 	sbi->s_mount_opt2 = old_opts.s_mount_opt2;  in __ext4_remount()
6755 	sbi->s_resuid = old_opts.s_resuid;  in __ext4_remount()
6756 	sbi->s_resgid = old_opts.s_resgid;  in __ext4_remount()
6757 	sbi->s_commit_interval = old_opts.s_commit_interval;  in __ext4_remount()
6758 	sbi->s_min_batch_time = old_opts.s_min_batch_time;  in __ext4_remount()
6759 	sbi->s_max_batch_time = old_opts.s_max_batch_time;  in __ext4_remount()
6762 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)  in __ext4_remount()
6765 	sbi->s_jquota_fmt = old_opts.s_jquota_fmt;  in __ext4_remount()
6768 		rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]);  in __ext4_remount()
6781 	struct super_block *sb = fc->root->d_sb;  in ext4_reconfigure()
6784 	fc->s_fs_info = EXT4_SB(sb);  in ext4_reconfigure()
6794 	ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.",  in ext4_reconfigure()
6795 		 &sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w",  in ext4_reconfigure()
6814 	spin_lock(&dquot->dq_dqb_lock);  in ext4_statfs_project()
6816 	limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,  in ext4_statfs_project()
6817 			     dquot->dq_dqb.dqb_bhardlimit);  in ext4_statfs_project()
6818 	limit >>= sb->s_blocksize_bits;  in ext4_statfs_project()
6820 	if (limit && buf->f_blocks > limit) {  in ext4_statfs_project()
6821 		curblock = (dquot->dq_dqb.dqb_curspace +  in ext4_statfs_project()
6822 			    dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;  in ext4_statfs_project()
6823 		buf->f_blocks = limit;  in ext4_statfs_project()
6824 		buf->f_bfree = buf->f_bavail =  in ext4_statfs_project()
6825 			(buf->f_blocks > curblock) ?  in ext4_statfs_project()
6826 			 (buf->f_blocks - curblock) : 0;  in ext4_statfs_project()
6829 	limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,  in ext4_statfs_project()
6830 			     dquot->dq_dqb.dqb_ihardlimit);  in ext4_statfs_project()
6831 	if (limit && buf->f_files > limit) {  in ext4_statfs_project()
6832 		buf->f_files = limit;  in ext4_statfs_project()
6833 		buf->f_ffree =  in ext4_statfs_project()
6834 			(buf->f_files > dquot->dq_dqb.dqb_curinodes) ?  in ext4_statfs_project()
6835 			 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;  in ext4_statfs_project()
6838 	spin_unlock(&dquot->dq_dqb_lock);  in ext4_statfs_project()
6846 	struct super_block *sb = dentry->d_sb;  in ext4_statfs()
6848 	struct ext4_super_block *es = sbi->s_es;  in ext4_statfs()  local
6851 	resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters));  in ext4_statfs()
6854 		overhead = sbi->s_overhead;  in ext4_statfs()
6856 	buf->f_type = EXT4_SUPER_MAGIC;  in ext4_statfs()
6857 	buf->f_bsize = sb->s_blocksize;  in ext4_statfs()
6858 	buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead);  in ext4_statfs()
6859 	bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) -  in ext4_statfs()
6860 		percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter);  in ext4_statfs()
6862 	buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0));  in ext4_statfs()
6863 	buf->f_bavail = buf->f_bfree -  in ext4_statfs()
6864 			(ext4_r_blocks_count(es) + resv_blocks);  in ext4_statfs()
6865 	if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks))  in ext4_statfs()
6866 		buf->f_bavail = 0;  in ext4_statfs()
6867 	buf->f_files = le32_to_cpu(es->s_inodes_count);  in ext4_statfs()
6868 	buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);  in ext4_statfs()
6869 	buf->f_namelen = EXT4_NAME_LEN;  in ext4_statfs()
6870 	buf->f_fsid = uuid_to_fsid(es->s_uuid);  in ext4_statfs()
6873 	if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) &&  in ext4_statfs()
6875 		ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf);  in ext4_statfs()
6889 	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type];  in dquot_to_inode()
6900 				    EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb));  in ext4_write_dquot()
6905 		ext4_error_err(dquot->dq_sb, -ret,  in ext4_write_dquot()
6907 			       dquot->dq_id.type);  in ext4_write_dquot()
6920 				    EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb));  in ext4_acquire_dquot()
6925 		ext4_error_err(dquot->dq_sb, -ret,  in ext4_acquire_dquot()
6927 			      dquot->dq_id.type);  in ext4_acquire_dquot()
6940 				    EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb));  in ext4_release_dquot()
6948 		ext4_error_err(dquot->dq_sb, -ret,  in ext4_release_dquot()
6950 			       dquot->dq_id.type);  in ext4_release_dquot()
6959 	struct super_block *sb = dquot->dq_sb;  in ext4_mark_dquot_dirty()
6990 	 * *exactly* the same as the argument to init_rwsem() --- in  in lockdep_set_quota_inode()
6991 	 * this case, in init_once() --- or lockdep gets unhappy  in lockdep_set_quota_inode()
6996 	lockdep_set_subclass(&ei->i_data_sem, subclass);  in lockdep_set_quota_inode()
7008 		return -EINVAL;  in ext4_quota_on()
7011 	if (path->dentry->d_sb != sb)  in ext4_quota_on()
7012 		return -EXDEV;  in ext4_quota_on()
7015 	if (IS_NOQUOTA(d_inode(path->dentry)))  in ext4_quota_on()
7016 		return -EBUSY;  in ext4_quota_on()
7019 	if (EXT4_SB(sb)->s_qf_names[type]) {  in ext4_quota_on()
7021 		if (path->dentry->d_parent != sb->s_root)  in ext4_quota_on()
7025 		sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY;  in ext4_quota_on()
7031 		sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY;  in ext4_quota_on()
7034 	lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);  in ext4_quota_on()
7037 		struct inode *inode = d_inode(path->dentry);  in ext4_quota_on()
7049 		EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL;  in ext4_quota_on()
7060 		lockdep_set_quota_inode(path->dentry->d_inode,  in ext4_quota_on()
7085 		le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),  in ext4_quota_enable()
7086 		le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),  in ext4_quota_enable()
7087 		le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)  in ext4_quota_enable()
7093 		return -EPERM;  in ext4_quota_enable()
7098 		return -EUCLEAN;  in ext4_quota_enable()
7109 	qf_inode->i_flags |= S_NOQUOTA;  in ext4_quota_enable()
7119 /* Enable usage tracking for all quota types. */
7124 		le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),  in ext4_enable_quotas()
7125 		le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),  in ext4_enable_quotas()
7126 		le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)  in ext4_enable_quotas()
7134 	sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY;  in ext4_enable_quotas()
7142 					"Failed to enable quota tracking "  in ext4_enable_quotas()
7157 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_off()
7173 	 * When the filesystem was remounted read-only first, we cannot cleanup  in ext4_quota_off()
7191 	EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL);  in ext4_quota_off()
7206 /* Read data from quotafile - avoid pagecache and such because we cannot afford
7213 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_read()
7215 	int offset = off & (sb->s_blocksize - 1);  in ext4_quota_read()
7224 		len = i_size-off;  in ext4_quota_read()
7227 		tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);  in ext4_quota_read()
7234 			memcpy(data, bh->b_data+offset, tocopy);  in ext4_quota_read()
7237 		toread -= tocopy;  in ext4_quota_read()
7249 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_write()
7251 	int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1);  in ext4_quota_write()
7260 		return -EIO;  in ext4_quota_write()
7266 	if (sb->s_blocksize - offset < len) {  in ext4_quota_write()
7270 		return -EIO;  in ext4_quota_write()
7277 	} while (PTR_ERR(bh) == -ENOSPC &&  in ext4_quota_write()
7278 		 ext4_should_retry_alloc(inode->i_sb, &retries));  in ext4_quota_write()
7290 	memcpy(bh->b_data+offset, data, len);  in ext4_quota_write()
7291 	flush_dcache_page(bh->b_page);  in ext4_quota_write()
7296 	if (inode->i_size < off + len) {  in ext4_quota_write()
7298 		EXT4_I(inode)->i_disksize = inode->i_size;  in ext4_quota_write()
7313 		       "EXT4-fs: Unable to register as ext2 (%d)\n", err);  in register_as_ext2()
7342 		       "EXT4-fs: Unable to register as ext3 (%d)\n", err);  in register_as_ext3()
7366 	struct file *bdev_file = sbi ? sbi->s_journal_bdev_file : NULL;  in ext4_kill_sb()
7394 	/* Build-time check for flags consistency */  in ext4_init_fs()