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)
173 	bh->b_end_io = end_io ? end_io : end_buffer_read_sync;  in __ext4_read_bh()
204 	return -EIO;  in ext4_read_bh()
232 		return ERR_PTR(-ENOMEM);  in __ext4_sb_bread_gfp()
268 				 struct ext4_super_block *es)  in ext4_verify_csum_type()  argument
273 	return es->s_checksum_type == EXT4_CRC32C_CHKSUM;  in ext4_verify_csum_type()
277 			    struct ext4_super_block *es)  in ext4_superblock_csum()  argument
283 	csum = ext4_chksum(sbi, ~0, (char *)es, offset);  in ext4_superblock_csum()
289 				       struct ext4_super_block *es)  in ext4_superblock_csum_verify()  argument
294 	return es->s_checksum == ext4_superblock_csum(sb, es);  in ext4_superblock_csum_verify()
299 	struct ext4_super_block *es = EXT4_SB(sb)->s_es;  in ext4_superblock_csum_set()  local
304 	es->s_checksum = ext4_superblock_csum(sb, es);  in ext4_superblock_csum_set()
310 	return le32_to_cpu(bg->bg_block_bitmap_lo) |  in ext4_block_bitmap()
312 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);  in ext4_block_bitmap()
318 	return le32_to_cpu(bg->bg_inode_bitmap_lo) |  in ext4_inode_bitmap()
320 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);  in ext4_inode_bitmap()
326 	return le32_to_cpu(bg->bg_inode_table_lo) |  in ext4_inode_table()
328 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);  in ext4_inode_table()
334 	return le16_to_cpu(bg->bg_free_blocks_count_lo) |  in ext4_free_group_clusters()
336 		 (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0);  in ext4_free_group_clusters()
342 	return le16_to_cpu(bg->bg_free_inodes_count_lo) |  in ext4_free_inodes_count()
344 		 (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0);  in ext4_free_inodes_count()
350 	return le16_to_cpu(bg->bg_used_dirs_count_lo) |  in ext4_used_dirs_count()
352 		 (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0);  in ext4_used_dirs_count()
358 	return le16_to_cpu(bg->bg_itable_unused_lo) |  in ext4_itable_unused_count()
360 		 (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0);  in ext4_itable_unused_count()
366 	bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk);  in ext4_block_bitmap_set()
368 		bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);  in ext4_block_bitmap_set()
374 	bg->bg_inode_bitmap_lo  = cpu_to_le32((u32)blk);  in ext4_inode_bitmap_set()
376 		bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32);  in ext4_inode_bitmap_set()
382 	bg->bg_inode_table_lo = cpu_to_le32((u32)blk);  in ext4_inode_table_set()
384 		bg->bg_inode_table_hi = cpu_to_le32(blk >> 32);  in ext4_inode_table_set()
390 	bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count);  in ext4_free_group_clusters_set()
392 		bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16);  in ext4_free_group_clusters_set()
398 	bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count);  in ext4_free_inodes_set()
400 		bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16);  in ext4_free_inodes_set()
406 	bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count);  in ext4_used_dirs_set()
408 		bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16);  in ext4_used_dirs_set()
414 	bg->bg_itable_unused_lo = cpu_to_le16((__u16)count);  in ext4_itable_unused_set()
416 		bg->bg_itable_unused_hi = cpu_to_le16(count >> 16);  in ext4_itable_unused_set()
421 	now = clamp_val(now, 0, (1ull << 40) - 1);  in __ext4_update_tstamp()
431 #define ext4_update_tstamp(es, tstamp) \  argument
432 	__ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \
434 #define ext4_get_tstamp(es, tstamp) \  argument
435 	__ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi)
444  * This function is designed to update the on-disk superblock only under
455 	struct ext4_super_block *es = sbi->s_es;  in ext4_maybe_update_superblock()  local
456 	journal_t *journal = sbi->s_journal;  in ext4_maybe_update_superblock()
462 	if (sb_rdonly(sb) || !(sb->s_flags & SB_ACTIVE) ||  in ext4_maybe_update_superblock()
463 	    !journal || (journal->j_flags & JBD2_UNMOUNT))  in ext4_maybe_update_superblock()
467 	last_update = ext4_get_tstamp(es, s_wtime);  in ext4_maybe_update_superblock()
469 	if (likely(now - last_update < EXT4_SB_REFRESH_INTERVAL_SEC))  in ext4_maybe_update_superblock()
472 	lifetime_write_kbytes = sbi->s_kbytes_written +  in ext4_maybe_update_superblock()
473 		((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -  in ext4_maybe_update_superblock()
474 		  sbi->s_sectors_written_start) >> 1);  in ext4_maybe_update_superblock()
482 	diff_size = lifetime_write_kbytes - le64_to_cpu(es->s_kbytes_written);  in ext4_maybe_update_superblock()
485 		schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in ext4_maybe_update_superblock()
489  * The del_gendisk() function uninitializes the disk-specific data
498 	struct inode *bd_inode = sb->s_bdev->bd_inode;  in block_device_ejected()
501 	return bdi->dev == NULL;  in block_device_ejected()
506 	struct super_block		*sb = journal->j_private;  in ext4_journal_commit_callback()
511 	BUG_ON(txn->t_state == T_FINISHED);  in ext4_journal_commit_callback()
513 	ext4_process_freed_data(sb, txn->t_tid);  in ext4_journal_commit_callback()
516 	spin_lock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
517 	while (!list_empty(&txn->t_private_list)) {  in ext4_journal_commit_callback()
518 		jce = list_entry(txn->t_private_list.next,  in ext4_journal_commit_callback()
520 		list_del_init(&jce->jce_list);  in ext4_journal_commit_callback()
521 		spin_unlock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
522 		jce->jce_func(sb, jce, error);  in ext4_journal_commit_callback()
523 		spin_lock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
525 	spin_unlock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
563 		    (jh && (jh->b_transaction != transaction ||  in ext4_journalled_writepage_callback()
564 			    jh->b_next_transaction))) {  in ext4_journalled_writepage_callback()
568 	} while ((bh = bh->b_this_page) != head);  in ext4_journalled_writepage_callback()
576 	struct address_space *mapping = jinode->i_vfs_inode->i_mapping;  in ext4_journalled_submit_inode_data_buffers()
580 		.range_start = jinode->i_dirty_start,  in ext4_journalled_submit_inode_data_buffers()
581 		.range_end = jinode->i_dirty_end,  in ext4_journalled_submit_inode_data_buffers()
586 				 jinode->i_transaction);  in ext4_journalled_submit_inode_data_buffers()
593 	if (ext4_should_journal_data(jinode->i_vfs_inode))  in ext4_journal_submit_inode_data_buffers()
604 	if (!ext4_should_journal_data(jinode->i_vfs_inode))  in ext4_journal_finish_inode_data_buffers()
662 	spin_lock(&sbi->s_error_lock);  in save_error_info()
663 	sbi->s_add_error_count++;  in save_error_info()
664 	sbi->s_last_error_code = error;  in save_error_info()
665 	sbi->s_last_error_line = line;  in save_error_info()
666 	sbi->s_last_error_ino = ino;  in save_error_info()
667 	sbi->s_last_error_block = block;  in save_error_info()
668 	sbi->s_last_error_func = func;  in save_error_info()
669 	sbi->s_last_error_time = ktime_get_real_seconds();  in save_error_info()
670 	if (!sbi->s_first_error_time) {  in save_error_info()
671 		sbi->s_first_error_code = error;  in save_error_info()
672 		sbi->s_first_error_line = line;  in save_error_info()
673 		sbi->s_first_error_ino = ino;  in save_error_info()
674 		sbi->s_first_error_block = block;  in save_error_info()
675 		sbi->s_first_error_func = func;  in save_error_info()
676 		sbi->s_first_error_time = sbi->s_last_error_time;  in save_error_info()
678 	spin_unlock(&sbi->s_error_lock);  in save_error_info()
705 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_handle_error()
708 	EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in ext4_handle_error()
713 		set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags);  in ext4_handle_error()
715 			jbd2_journal_abort(journal, -EIO);  in ext4_handle_error()
718 	if (!bdev_read_only(sb->s_bdev)) {  in ext4_handle_error()
727 			schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in ext4_handle_error()
734 	 * could panic during 'reboot -f' as the underlying device got already  in ext4_handle_error()
738 		panic("EXT4-fs (device %s): panic forced after error\n",  in ext4_handle_error()
739 			sb->s_id);  in ext4_handle_error()
745 	ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");  in ext4_handle_error()
747 	 * Make sure updated value of ->s_mount_flags will be visible before  in ext4_handle_error()
748 	 * ->s_flags update  in ext4_handle_error()
751 	sb->s_flags |= SB_RDONLY;  in ext4_handle_error()
758 	journal_t *journal = sbi->s_journal;  in update_super_work()
769 	if (!sb_rdonly(sbi->s_sb) && journal) {  in update_super_work()
770 		struct buffer_head *sbh = sbi->s_sbh;  in update_super_work()
781 		if (sbi->s_add_error_count > 0)  in update_super_work()
784 		ext4_update_super(sbi->s_sb);  in update_super_work()
786 			ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "  in update_super_work()
808 	ext4_commit_super(sbi->s_sb);  in update_super_work()
813 		___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state),	\
814 			     "EXT4-fs error")
832 		       "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",  in __ext4_error()
833 		       sb->s_id, function, line, current->comm, &vaf);  in __ext4_error()
848 	if (unlikely(ext4_forced_shutdown(inode->i_sb)))  in __ext4_error_inode()
851 	trace_ext4_error(inode->i_sb, function, line);  in __ext4_error_inode()
852 	if (ext4_error_ratelimit(inode->i_sb)) {  in __ext4_error_inode()
857 			printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "  in __ext4_error_inode()
859 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_inode()
860 			       block, current->comm, &vaf);  in __ext4_error_inode()
862 			printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "  in __ext4_error_inode()
864 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_inode()
865 			       current->comm, &vaf);  in __ext4_error_inode()
868 	fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED);  in __ext4_error_inode()
870 	ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block,  in __ext4_error_inode()
883 	if (unlikely(ext4_forced_shutdown(inode->i_sb)))  in __ext4_error_file()
886 	trace_ext4_error(inode->i_sb, function, line);  in __ext4_error_file()
887 	if (ext4_error_ratelimit(inode->i_sb)) {  in __ext4_error_file()
896 			       "EXT4-fs error (device %s): %s:%d: inode #%lu: "  in __ext4_error_file()
898 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_file()
899 			       block, current->comm, path, &vaf);  in __ext4_error_file()
902 			       "EXT4-fs error (device %s): %s:%d: inode #%lu: "  in __ext4_error_file()
904 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_file()
905 			       current->comm, path, &vaf);  in __ext4_error_file()
908 	fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED);  in __ext4_error_file()
910 	ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block,  in __ext4_error_file()
920 	case -EFSCORRUPTED:  in ext4_decode_error()
923 	case -EFSBADCRC:  in ext4_decode_error()
926 	case -EIO:  in ext4_decode_error()
929 	case -ENOMEM:  in ext4_decode_error()
932 	case -EROFS:  in ext4_decode_error()
933 		if (!sb || (EXT4_SB(sb)->s_journal &&  in ext4_decode_error()
934 			    EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT))  in ext4_decode_error()
945 			if (snprintf(nbuf, 16, "error %d", -errno) >= 0)  in ext4_decode_error()
969 	if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb))  in __ext4_std_error()
974 		printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n",  in __ext4_std_error()
975 		       sb->s_id, function, line, errstr);  in __ext4_std_error()
979 	ext4_handle_error(sb, false, -errno, 0, 0, function, line);  in __ext4_std_error()
989 		atomic_inc(&EXT4_SB(sb)->s_msg_count);  in __ext4_msg()
990 		if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state),  in __ext4_msg()
991 				  "EXT4-fs"))  in __ext4_msg()
999 		printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);  in __ext4_msg()
1001 		printk("%sEXT4-fs: %pV\n", prefix, &vaf);  in __ext4_msg()
1007 	atomic_inc(&EXT4_SB(sb)->s_warning_count);  in ext4_warning_ratelimit()
1008 	return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state),  in ext4_warning_ratelimit()
1009 			    "EXT4-fs warning");  in ext4_warning_ratelimit()
1024 	printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n",  in __ext4_warning()
1025 	       sb->s_id, function, line, &vaf);  in __ext4_warning()
1035 	if (!ext4_warning_ratelimit(inode->i_sb))  in __ext4_warning_inode()
1041 	printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: "  in __ext4_warning_inode()
1042 	       "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id,  in __ext4_warning_inode()
1043 	       function, line, inode->i_ino, current->comm, &vaf);  in __ext4_warning_inode()
1065 		printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ",  in __ext4_grp_locked_error()
1066 		       sb->s_id, function, line, grp);  in __ext4_grp_locked_error()
1079 		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in __ext4_grp_locked_error()
1080 		if (!bdev_read_only(sb->s_bdev)) {  in __ext4_grp_locked_error()
1083 			schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in __ext4_grp_locked_error()
1117 					    &grp->bb_state);  in ext4_mark_group_bitmap_corrupted()
1119 			percpu_counter_sub(&sbi->s_freeclusters_counter,  in ext4_mark_group_bitmap_corrupted()
1120 					   grp->bb_free);  in ext4_mark_group_bitmap_corrupted()
1125 					    &grp->bb_state);  in ext4_mark_group_bitmap_corrupted()
1130 			percpu_counter_sub(&sbi->s_freeinodes_counter,  in ext4_mark_group_bitmap_corrupted()
1138 	struct ext4_super_block *es = EXT4_SB(sb)->s_es;  in ext4_update_dynamic_rev()  local
1140 	if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV)  in ext4_update_dynamic_rev()
1148 	es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO);  in ext4_update_dynamic_rev()
1149 	es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE);  in ext4_update_dynamic_rev()
1150 	es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV);  in ext4_update_dynamic_rev()
1151 	/* leave es->s_feature_*compat flags alone */  in ext4_update_dynamic_rev()
1152 	/* es->s_uuid will be set by e2fsck if empty */  in ext4_update_dynamic_rev()
1163 	return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode;  in orphan_list_entry()
1171 		 le32_to_cpu(sbi->s_es->s_last_orphan));  in dump_orphan_list()
1174 	list_for_each(l, &sbi->s_orphan) {  in dump_orphan_list()
1178 		       inode->i_sb->s_id, inode->i_ino, inode,  in dump_orphan_list()
1179 		       inode->i_mode, inode->i_nlink,  in dump_orphan_list()
1192 	for (type--; type >= 0; type--)  in ext4_quotas_off()
1204 	return rcu_dereference_protected(sbi->s_qf_names[type],  in get_qf_name()
1205 					 lockdep_is_held(&sb->s_umount));  in get_qf_name()
1218 	block = ext4_count_free_clusters(sbi->s_sb);  in ext4_percpu_param_init()
1219 	ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block));  in ext4_percpu_param_init()
1220 	err = percpu_counter_init(&sbi->s_freeclusters_counter, block,  in ext4_percpu_param_init()
1223 		unsigned long freei = ext4_count_free_inodes(sbi->s_sb);  in ext4_percpu_param_init()
1224 		sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);  in ext4_percpu_param_init()
1225 		err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,  in ext4_percpu_param_init()
1229 		err = percpu_counter_init(&sbi->s_dirs_counter,  in ext4_percpu_param_init()
1230 					  ext4_count_dirs(sbi->s_sb), GFP_KERNEL);  in ext4_percpu_param_init()
1232 		err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,  in ext4_percpu_param_init()
1235 		err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0,  in ext4_percpu_param_init()
1238 		err = percpu_init_rwsem(&sbi->s_writepages_rwsem);  in ext4_percpu_param_init()
1241 		ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory");  in ext4_percpu_param_init()
1248 	percpu_counter_destroy(&sbi->s_freeclusters_counter);  in ext4_percpu_param_destroy()
1249 	percpu_counter_destroy(&sbi->s_freeinodes_counter);  in ext4_percpu_param_destroy()
1250 	percpu_counter_destroy(&sbi->s_dirs_counter);  in ext4_percpu_param_destroy()
1251 	percpu_counter_destroy(&sbi->s_dirtyclusters_counter);  in ext4_percpu_param_destroy()
1252 	percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);  in ext4_percpu_param_destroy()
1253 	percpu_free_rwsem(&sbi->s_writepages_rwsem);  in ext4_percpu_param_destroy()
1262 	group_desc = rcu_dereference(sbi->s_group_desc);  in ext4_group_desc_free()
1263 	for (i = 0; i < sbi->s_gdb_count; i++)  in ext4_group_desc_free()
1275 	flex_groups = rcu_dereference(sbi->s_flex_groups);  in ext4_flex_groups_free()
1277 		for (i = 0; i < sbi->s_flex_groups_allocated; i++)  in ext4_flex_groups_free()
1287 	struct ext4_super_block *es = sbi->s_es;  in ext4_put_super()  local
1294 	 * path which could have sbi->s_journal->j_task as NULL  in ext4_put_super()
1295 	 * Unregister sysfs before flush sbi->s_sb_upd_work.  in ext4_put_super()
1303 	if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount"))  in ext4_put_super()
1305 			 &sb->s_uuid);  in ext4_put_super()
1310 	flush_work(&sbi->s_sb_upd_work);  in ext4_put_super()
1311 	destroy_workqueue(sbi->rsv_conversion_wq);  in ext4_put_super()
1314 	if (sbi->s_journal) {  in ext4_put_super()
1315 		aborted = is_journal_aborted(sbi->s_journal);  in ext4_put_super()
1316 		err = jbd2_journal_destroy(sbi->s_journal);  in ext4_put_super()
1317 		sbi->s_journal = NULL;  in ext4_put_super()
1319 			ext4_abort(sb, -err, "Couldn't clean up the journal");  in ext4_put_super()
1324 	timer_shutdown_sync(&sbi->s_err_report);  in ext4_put_super()
1332 		es->s_state = cpu_to_le16(sbi->s_mount_state);  in ext4_put_super()
1345 	/* Debugging code just in case the in-memory inode orphan list  in ext4_put_super()
1346 	 * isn't empty.  The on-disk one can be non-empty if we've  in ext4_put_super()
1348 	 * in-memory list had better be clean by this point. */  in ext4_put_super()
1349 	if (!list_empty(&sbi->s_orphan))  in ext4_put_super()
1351 	ASSERT(list_empty(&sbi->s_orphan));  in ext4_put_super()
1353 	sync_blockdev(sb->s_bdev);  in ext4_put_super()
1354 	invalidate_bdev(sb->s_bdev);  in ext4_put_super()
1355 	if (sbi->s_journal_bdev) {  in ext4_put_super()
1358 		 * floating about in memory - the physical journal device may  in ext4_put_super()
1359 		 * hotswapped, and it breaks the `ro-after' testing code.  in ext4_put_super()
1361 		sync_blockdev(sbi->s_journal_bdev);  in ext4_put_super()
1362 		invalidate_bdev(sbi->s_journal_bdev);  in ext4_put_super()
1365 	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);  in ext4_put_super()
1366 	sbi->s_ea_inode_cache = NULL;  in ext4_put_super()
1368 	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);  in ext4_put_super()
1369 	sbi->s_ea_block_cache = NULL;  in ext4_put_super()
1373 	brelse(sbi->s_sbh);  in ext4_put_super()
1374 	sb->s_fs_info = NULL;  in ext4_put_super()
1379 	kobject_put(&sbi->s_kobj);  in ext4_put_super()
1380 	wait_for_completion(&sbi->s_kobj_unregister);  in ext4_put_super()
1381 	if (sbi->s_chksum_driver)  in ext4_put_super()
1382 		crypto_free_shash(sbi->s_chksum_driver);  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_I(inode)->i_reserved_data_blocks)  in ext4_destroy_inode()
1470 		ext4_msg(inode->i_sb, KERN_ERR,  in ext4_destroy_inode()
1472 			 inode->i_ino, EXT4_I(inode),  in ext4_destroy_inode()
1473 			 EXT4_I(inode)->i_reserved_data_blocks);  in ext4_destroy_inode()
1485 	INIT_LIST_HEAD(&ei->i_orphan);  in init_once()
1486 	init_rwsem(&ei->xattr_sem);  in init_once()
1487 	init_rwsem(&ei->i_data_sem);  in init_once()
1488 	inode_init_once(&ei->vfs_inode);  in init_once()
1489 	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()
1688 	{"remount-ro",	EXT4_MOUNT_ERRORS_RO},
1933 ext4_sb_read_encoding(const struct ext4_super_block *es)  in ext4_sb_read_encoding()  argument
1935 	__u16 magic = le16_to_cpu(es->s_encoding);  in ext4_sb_read_encoding()
1999 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_fc_free()
2006 		kfree(ctx->s_qf_names[i]);  in ext4_fc_free()
2008 	fscrypt_free_dummy_policy(&ctx->dummy_enc_policy);  in ext4_fc_free()
2018 		return -ENOMEM;  in ext4_init_fs_context()
2020 	fc->fs_private = ctx;  in ext4_init_fs_context()
2021 	fc->ops = &ext4_context_ops;  in ext4_init_fs_context()
2033 	struct ext4_fs_context *ctx = fc->fs_private;  in note_qf_name()
2036 	if (param->size < 1) {  in note_qf_name()
2038 		return -EINVAL;  in note_qf_name()
2040 	if (strchr(param->string, '/')) {  in note_qf_name()
2043 		return -EINVAL;  in note_qf_name()
2045 	if (ctx->s_qf_names[qtype]) {  in note_qf_name()
2046 		if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) {  in note_qf_name()
2050 			return -EINVAL;  in note_qf_name()
2055 	qname = kmemdup_nul(param->string, param->size, GFP_KERNEL);  in note_qf_name()
2059 		return -ENOMEM;  in note_qf_name()
2061 	ctx->s_qf_names[qtype] = qname;  in note_qf_name()
2062 	ctx->qname_spec |= 1 << qtype;  in note_qf_name()
2063 	ctx->spec |= EXT4_SPEC_JQUOTA;  in note_qf_name()
2072 	struct ext4_fs_context *ctx = fc->fs_private;  in unnote_qf_name()
2074 	if (ctx->s_qf_names[qtype])  in unnote_qf_name()
2075 		kfree(ctx->s_qf_names[qtype]);  in unnote_qf_name()
2077 	ctx->s_qf_names[qtype] = NULL;  in unnote_qf_name()
2078 	ctx->qname_spec |= 1 << qtype;  in unnote_qf_name()
2079 	ctx->spec |= EXT4_SPEC_JQUOTA;  in unnote_qf_name()
2092 		return -EINVAL;  in ext4_parse_test_dummy_encryption()
2095 						  &ctx->dummy_enc_policy);  in ext4_parse_test_dummy_encryption()
2096 	if (err == -EINVAL) {  in ext4_parse_test_dummy_encryption()
2098 			 "Value of option \"%s\" is unrecognized", param->key);  in ext4_parse_test_dummy_encryption()
2099 	} else if (err == -EEXIST) {  in ext4_parse_test_dummy_encryption()
2102 		return -EINVAL;  in ext4_parse_test_dummy_encryption()
2111 	ctx->mask_s_##name |= flag;					\
2112 	ctx->vals_s_##name |= flag;					\
2119 	ctx->mask_s_##name |= flag;					\
2120 	ctx->vals_s_##name &= ~flag;					\
2127 	return (ctx->vals_s_##name & flag);				\
2140 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_parse_param()
2151 	is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;  in ext4_parse_param()
2153 	for (m = ext4_mount_opts; m->token != Opt_err; m++)  in ext4_parse_param()
2154 		if (token == m->token)  in ext4_parse_param()
2157 	ctx->opt_flags |= m->flags;  in ext4_parse_param()
2159 	if (m->flags & MOPT_EXPLICIT) {  in ext4_parse_param()
2160 		if (m->mount_opt & EXT4_MOUNT_DELALLOC) {  in ext4_parse_param()
2162 		} else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) {  in ext4_parse_param()
2166 			return -EINVAL;  in ext4_parse_param()
2169 	if (m->flags & MOPT_NOSUPPORT) {  in ext4_parse_param()
2171 			 param->key);  in ext4_parse_param()
2178 		if (!*param->string)  in ext4_parse_param()
2183 		if (!*param->string)  in ext4_parse_param()
2189 		if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ext4_parse_param()
2191 				 "Ignoring %s option on remount", param->key);  in ext4_parse_param()
2193 			ctx->s_sb_block = result.uint_32;  in ext4_parse_param()
2194 			ctx->spec |= EXT4_SPEC_s_sb_block;  in ext4_parse_param()
2199 			 param->key);  in ext4_parse_param()
2214 		ctx->s_jquota_fmt = result.uint_32;  in ext4_parse_param()
2215 		ctx->spec |= EXT4_SPEC_JQFMT;  in ext4_parse_param()
2221 		ctx->spec |= EXT4_SPEC_DATAJ;  in ext4_parse_param()
2231 			return -EINVAL;  in ext4_parse_param()
2233 		ctx->s_commit_interval = HZ * result.uint_32;  in ext4_parse_param()
2234 		ctx->spec |= EXT4_SPEC_s_commit_interval;  in ext4_parse_param()
2240 			return -EINVAL;  in ext4_parse_param()
2242 		ctx->s_want_extra_isize = result.uint_32;  in ext4_parse_param()
2243 		ctx->spec |= EXT4_SPEC_s_want_extra_isize;  in ext4_parse_param()
2246 		ctx->s_max_batch_time = result.uint_32;  in ext4_parse_param()
2247 		ctx->spec |= EXT4_SPEC_s_max_batch_time;  in ext4_parse_param()
2250 		ctx->s_min_batch_time = result.uint_32;  in ext4_parse_param()
2251 		ctx->spec |= EXT4_SPEC_s_min_batch_time;  in ext4_parse_param()
2258 				 "EXT4-fs: inode_readahead_blks must be "  in ext4_parse_param()
2260 			return -EINVAL;  in ext4_parse_param()
2262 		ctx->s_inode_readahead_blks = result.uint_32;  in ext4_parse_param()
2263 		ctx->spec |= EXT4_SPEC_s_inode_readahead_blks;  in ext4_parse_param()
2267 		ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;  in ext4_parse_param()
2268 		if (param->type == fs_value_is_string)  in ext4_parse_param()
2269 			ctx->s_li_wait_mult = result.uint_32;  in ext4_parse_param()
2270 		ctx->spec |= EXT4_SPEC_s_li_wait_mult;  in ext4_parse_param()
2273 		ctx->s_max_dir_size_kb = result.uint_32;  in ext4_parse_param()
2274 		ctx->spec |= EXT4_SPEC_s_max_dir_size_kb;  in ext4_parse_param()
2278 		ctx->s_fc_debug_max_replay = result.uint_32;  in ext4_parse_param()
2279 		ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay;  in ext4_parse_param()
2283 		ctx->s_stripe = result.uint_32;  in ext4_parse_param()
2284 		ctx->spec |= EXT4_SPEC_s_stripe;  in ext4_parse_param()
2291 			return -EINVAL;  in ext4_parse_param()
2293 		ctx->s_resuid = uid;  in ext4_parse_param()
2294 		ctx->spec |= EXT4_SPEC_s_resuid;  in ext4_parse_param()
2301 			return -EINVAL;  in ext4_parse_param()
2303 		ctx->s_resgid = gid;  in ext4_parse_param()
2304 		ctx->spec |= EXT4_SPEC_s_resgid;  in ext4_parse_param()
2310 			return -EINVAL;  in ext4_parse_param()
2312 		ctx->journal_devnum = result.uint_32;  in ext4_parse_param()
2313 		ctx->spec |= EXT4_SPEC_JOURNAL_DEV;  in ext4_parse_param()
2324 			return -EINVAL;  in ext4_parse_param()
2331 			return -EINVAL;  in ext4_parse_param()
2335 		ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev);  in ext4_parse_param()
2336 		ctx->spec |= EXT4_SPEC_JOURNAL_DEV;  in ext4_parse_param()
2343 				 " (must be 0-7)");  in ext4_parse_param()
2344 			return -EINVAL;  in ext4_parse_param()
2346 		ctx->journal_ioprio =  in ext4_parse_param()
2348 		ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO;  in ext4_parse_param()
2380 		return -EINVAL;  in ext4_parse_param()
2384 			ctx_set_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2386 			ctx_clear_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2391 			ctx->spec |= EXT4_SPEC_mb_optimize_scan;  in ext4_parse_param()
2394 			ctx->spec |= EXT4_SPEC_mb_optimize_scan;  in ext4_parse_param()
2398 			return -EINVAL;  in ext4_parse_param()
2407 	if (m->token == Opt_err) {  in ext4_parse_param()
2409 			 param->key);  in ext4_parse_param()
2411 		return -EINVAL;  in ext4_parse_param()
2417 		if ((param->type == fs_value_is_flag) ||  in ext4_parse_param()
2421 		if (m->flags & MOPT_CLEAR)  in ext4_parse_param()
2423 		else if (unlikely(!(m->flags & MOPT_SET))) {  in ext4_parse_param()
2426 				 param->key);  in ext4_parse_param()
2428 			return -EINVAL;  in ext4_parse_param()
2430 		if (m->flags & MOPT_2) {  in ext4_parse_param()
2432 				ctx_set_mount_opt2(ctx, m->mount_opt);  in ext4_parse_param()
2434 				ctx_clear_mount_opt2(ctx, m->mount_opt);  in ext4_parse_param()
2437 				ctx_set_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2439 				ctx_clear_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2472 					return -ENOMEM;  in parse_options()
2501 	int ret = -ENOMEM;  in parse_apply_sb_mount_options()
2503 	if (!sbi->s_es->s_mount_opts[0])  in parse_apply_sb_mount_options()
2506 	s_mount_opts = kstrndup(sbi->s_es->s_mount_opts,  in parse_apply_sb_mount_options()
2507 				sizeof(sbi->s_es->s_mount_opts),  in parse_apply_sb_mount_options()
2520 	fc->fs_private = s_ctx;  in parse_apply_sb_mount_options()
2521 	fc->s_fs_info = sbi;  in parse_apply_sb_mount_options()
2537 	if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV)  in parse_apply_sb_mount_options()
2538 		m_ctx->journal_devnum = s_ctx->journal_devnum;  in parse_apply_sb_mount_options()
2539 	if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)  in parse_apply_sb_mount_options()
2540 		m_ctx->journal_ioprio = s_ctx->journal_ioprio;  in parse_apply_sb_mount_options()
2559 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_apply_quota_options()
2567 	if (ctx->spec & EXT4_SPEC_JQUOTA) {  in ext4_apply_quota_options()
2569 			if (!(ctx->qname_spec & (1 << i)))  in ext4_apply_quota_options()
2572 			qname = ctx->s_qf_names[i]; /* May be NULL */  in ext4_apply_quota_options()
2575 			ctx->s_qf_names[i] = NULL;  in ext4_apply_quota_options()
2576 			qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,  in ext4_apply_quota_options()
2577 						lockdep_is_held(&sb->s_umount));  in ext4_apply_quota_options()
2583 	if (ctx->spec & EXT4_SPEC_JQFMT)  in ext4_apply_quota_options()
2584 		sbi->s_jquota_fmt = ctx->s_jquota_fmt;  in ext4_apply_quota_options()
2595 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_quota_consistency()
2610 			 "Cannot enable project quota enforcement.");  in ext4_check_quota_consistency()
2611 		return -EINVAL;  in ext4_check_quota_consistency()
2617 	    ctx->mask_s_mount_opt & quota_flags &&  in ext4_check_quota_consistency()
2621 	if (ctx->spec & EXT4_SPEC_JQUOTA) {  in ext4_check_quota_consistency()
2624 			if (!(ctx->qname_spec & (1 << i)))  in ext4_check_quota_consistency()
2628 			    !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i])  in ext4_check_quota_consistency()
2631 			if (sbi->s_qf_names[i] && ctx->s_qf_names[i] &&  in ext4_check_quota_consistency()
2633 				   ctx->s_qf_names[i]) != 0)  in ext4_check_quota_consistency()
2645 	if (ctx->spec & EXT4_SPEC_JQFMT) {  in ext4_check_quota_consistency()
2646 		if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded)  in ext4_check_quota_consistency()
2657 		       ctx->s_qf_names[USRQUOTA]);  in ext4_check_quota_consistency()
2659 		       ctx->s_qf_names[GRPQUOTA]);  in ext4_check_quota_consistency()
2680 			return -EINVAL;  in ext4_check_quota_consistency()
2683 		if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) {  in ext4_check_quota_consistency()
2686 			return -EINVAL;  in ext4_check_quota_consistency()
2695 	return -EINVAL;  in ext4_check_quota_consistency()
2699 	return -EINVAL;  in ext4_check_quota_consistency()
2703 	return -EINVAL;  in ext4_check_quota_consistency()
2712 	const struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_test_dummy_encryption()
2715 	if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2721 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2729 	if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ext4_check_test_dummy_encryption()
2730 		if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,  in ext4_check_test_dummy_encryption()
2731 						 &ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2735 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2738 	if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) {  in ext4_check_test_dummy_encryption()
2739 		if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,  in ext4_check_test_dummy_encryption()
2740 						 &ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2744 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2752 	if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) ||  in ext4_apply_test_dummy_encryption()
2754 	    fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy))  in ext4_apply_test_dummy_encryption()
2756 	EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy;  in ext4_apply_test_dummy_encryption()
2757 	memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy));  in ext4_apply_test_dummy_encryption()
2764 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_opt_consistency()
2765 	struct ext4_sb_info *sbi = fc->s_fs_info;  in ext4_check_opt_consistency()
2766 	int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;  in ext4_check_opt_consistency()
2769 	if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) {  in ext4_check_opt_consistency()
2772 		return -EINVAL;  in ext4_check_opt_consistency()
2774 	if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) {  in ext4_check_opt_consistency()
2777 		return -EINVAL;  in ext4_check_opt_consistency()
2780 	if (ctx->s_want_extra_isize >  in ext4_check_opt_consistency()
2781 	    (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) {  in ext4_check_opt_consistency()
2784 			 ctx->s_want_extra_isize);  in ext4_check_opt_consistency()
2785 		return -EINVAL;  in ext4_check_opt_consistency()
2790 			BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);  in ext4_check_opt_consistency()
2801 	if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) {  in ext4_check_opt_consistency()
2802 		if (!sbi->s_journal) {  in ext4_check_opt_consistency()
2811 			return -EINVAL;  in ext4_check_opt_consistency()
2820 			return -EINVAL;  in ext4_check_opt_consistency()
2824 		    (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||  in ext4_check_opt_consistency()
2825 		     (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) {  in ext4_check_opt_consistency()
2829 			return -EINVAL;  in ext4_check_opt_consistency()
2831 			 (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||  in ext4_check_opt_consistency()
2832 			  (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) {  in ext4_check_opt_consistency()
2835 			   ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||  in ext4_check_opt_consistency()
2836 			    (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||  in ext4_check_opt_consistency()
2837 			    !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) {  in ext4_check_opt_consistency()
2847 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_apply_options()
2848 	struct ext4_sb_info *sbi = fc->s_fs_info;  in ext4_apply_options()
2850 	sbi->s_mount_opt &= ~ctx->mask_s_mount_opt;  in ext4_apply_options()
2851 	sbi->s_mount_opt |= ctx->vals_s_mount_opt;  in ext4_apply_options()
2852 	sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2;  in ext4_apply_options()
2853 	sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2;  in ext4_apply_options()
2854 	sb->s_flags &= ~ctx->mask_s_flags;  in ext4_apply_options()
2855 	sb->s_flags |= ctx->vals_s_flags;  in ext4_apply_options()
2857 #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; })  in ext4_apply_options()
2881 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_validate_options()
2884 	usr_qf_name = ctx->s_qf_names[USRQUOTA];  in ext4_validate_options()
2885 	grp_qf_name = ctx->s_qf_names[GRPQUOTA];  in ext4_validate_options()
2898 			return -EINVAL;  in ext4_validate_options()
2912 	if (sbi->s_jquota_fmt) {  in ext4_show_quota_options()
2915 		switch (sbi->s_jquota_fmt) {  in ext4_show_quota_options()
2930 	usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]);  in ext4_show_quota_options()
2931 	grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]);  in ext4_show_quota_options()
2944 	for (spec = ext4_param_specs; spec->name != NULL; spec++)  in token2str()
2945 		if (spec->opt == token && !spec->type)  in token2str()
2947 	return spec->name;  in token2str()
2952  *  - it's set to a non-default value OR
2953  *  - if the per-sb default is different from the global default
2959 	struct ext4_super_block *es = sbi->s_es;  in _ext4_show_options()  local
2967 	if (sbi->s_sb_block != 1)  in _ext4_show_options()
2968 		SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block);  in _ext4_show_options()
2970 	for (m = ext4_mount_opts; m->token != Opt_err; m++) {  in _ext4_show_options()
2971 		int want_set = m->flags & MOPT_SET;  in _ext4_show_options()
2972 		int opt_2 = m->flags & MOPT_2;  in _ext4_show_options()
2975 		if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) ||  in _ext4_show_options()
2976 		    m->flags & MOPT_SKIP)  in _ext4_show_options()
2980 			mount_opt = sbi->s_mount_opt2;  in _ext4_show_options()
2981 			def_mount_opt = sbi->s_def_mount_opt2;  in _ext4_show_options()
2983 			mount_opt = sbi->s_mount_opt;  in _ext4_show_options()
2984 			def_mount_opt = sbi->s_def_mount_opt;  in _ext4_show_options()
2987 		if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt)))  in _ext4_show_options()
2991 		     (mount_opt & m->mount_opt) != m->mount_opt) ||  in _ext4_show_options()
2992 		    (!want_set && (mount_opt & m->mount_opt)))  in _ext4_show_options()
2994 		SEQ_OPTS_PRINT("%s", token2str(m->token));  in _ext4_show_options()
2997 	if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) ||  in _ext4_show_options()
2998 	    le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID)  in _ext4_show_options()
3000 				from_kuid_munged(&init_user_ns, sbi->s_resuid));  in _ext4_show_options()
3001 	if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) ||  in _ext4_show_options()
3002 	    le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID)  in _ext4_show_options()
3004 				from_kgid_munged(&init_user_ns, sbi->s_resgid));  in _ext4_show_options()
3005 	def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors);  in _ext4_show_options()
3007 		SEQ_OPTS_PUTS("errors=remount-ro");  in _ext4_show_options()
3012 	if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ)  in _ext4_show_options()
3013 		SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ);  in _ext4_show_options()
3014 	if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME)  in _ext4_show_options()
3015 		SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time);  in _ext4_show_options()
3016 	if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME)  in _ext4_show_options()
3017 		SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time);  in _ext4_show_options()
3018 	if (nodefs || sbi->s_stripe)  in _ext4_show_options()
3019 		SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe);  in _ext4_show_options()
3021 			(sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {  in _ext4_show_options()
3030 	    sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS)  in _ext4_show_options()
3032 			       sbi->s_inode_readahead_blks);  in _ext4_show_options()
3035 		       (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT)))  in _ext4_show_options()
3036 		SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult);  in _ext4_show_options()
3037 	if (nodefs || sbi->s_max_dir_size_kb)  in _ext4_show_options()
3038 		SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);  in _ext4_show_options()
3044 	if (sb->s_flags & SB_INLINECRYPT)  in _ext4_show_options()
3058 	if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&  in _ext4_show_options()
3061 	} else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&  in _ext4_show_options()
3072 	return _ext4_show_options(seq, root->d_sb, 0);  in ext4_show_options()
3077 	struct super_block *sb = seq->private;  in ext4_seq_options_show()
3086 static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,  in ext4_setup_super()  argument
3092 	if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) {  in ext4_setup_super()
3094 			 "forcing read-only mode");  in ext4_setup_super()
3095 		err = -EROFS;  in ext4_setup_super()
3100 	if (!(sbi->s_mount_state & EXT4_VALID_FS))  in ext4_setup_super()
3103 	else if (sbi->s_mount_state & EXT4_ERROR_FS)  in ext4_setup_super()
3107 	else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 &&  in ext4_setup_super()
3108 		 le16_to_cpu(es->s_mnt_count) >=  in ext4_setup_super()
3109 		 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))  in ext4_setup_super()
3113 	else if (le32_to_cpu(es->s_checkinterval) &&  in ext4_setup_super()
3114 		 (ext4_get_tstamp(es, s_lastcheck) +  in ext4_setup_super()
3115 		  le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds()))  in ext4_setup_super()
3119 	if (!sbi->s_journal)  in ext4_setup_super()
3120 		es->s_state &= cpu_to_le16(~EXT4_VALID_FS);  in ext4_setup_super()
3121 	if (!(__s16) le16_to_cpu(es->s_max_mnt_count))  in ext4_setup_super()
3122 		es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT);  in ext4_setup_super()
3123 	le16_add_cpu(&es->s_mnt_count, 1);  in ext4_setup_super()
3124 	ext4_update_tstamp(es, s_mtime);  in ext4_setup_super()
3125 	if (sbi->s_journal) {  in ext4_setup_super()
3136 			sb->s_blocksize,  in ext4_setup_super()
3137 			sbi->s_groups_count,  in ext4_setup_super()
3140 			sbi->s_mount_opt, sbi->s_mount_opt2);  in ext4_setup_super()
3150 	if (!sbi->s_log_groups_per_flex)  in ext4_alloc_flex_bg_array()
3153 	size = ext4_flex_group(sbi, ngroup - 1) + 1;  in ext4_alloc_flex_bg_array()
3154 	if (size <= sbi->s_flex_groups_allocated)  in ext4_alloc_flex_bg_array()
3158 			      sizeof(*sbi->s_flex_groups)), GFP_KERNEL);  in ext4_alloc_flex_bg_array()
3162 		return -ENOMEM;  in ext4_alloc_flex_bg_array()
3164 	for (i = sbi->s_flex_groups_allocated; i < size; i++) {  in ext4_alloc_flex_bg_array()
3169 			for (j = sbi->s_flex_groups_allocated; j < i; j++)  in ext4_alloc_flex_bg_array()
3174 			return -ENOMEM;  in ext4_alloc_flex_bg_array()
3178 	old_groups = rcu_dereference(sbi->s_flex_groups);  in ext4_alloc_flex_bg_array()
3181 		       (sbi->s_flex_groups_allocated *  in ext4_alloc_flex_bg_array()
3184 	rcu_assign_pointer(sbi->s_flex_groups, new_groups);  in ext4_alloc_flex_bg_array()
3185 	sbi->s_flex_groups_allocated = size;  in ext4_alloc_flex_bg_array()
3199 	sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;  in ext4_fill_flex_info()
3200 	if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) {  in ext4_fill_flex_info()
3201 		sbi->s_log_groups_per_flex = 0;  in ext4_fill_flex_info()
3205 	err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);  in ext4_fill_flex_info()
3209 	for (i = 0; i < sbi->s_groups_count; i++) {  in ext4_fill_flex_info()
3214 		atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes);  in ext4_fill_flex_info()
3216 			     &fg->free_clusters);  in ext4_fill_flex_info()
3217 		atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs);  in ext4_fill_flex_info()
3233 	if (ext4_has_metadata_csum(sbi->s_sb)) {  in ext4_group_desc_csum()
3238 		csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group,  in ext4_group_desc_csum()
3244 		if (offset < sbi->s_desc_size)  in ext4_group_desc_csum()
3246 					     sbi->s_desc_size - offset);  in ext4_group_desc_csum()
3256 	crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));  in ext4_group_desc_csum()
3259 	offset += sizeof(gdp->bg_checksum); /* skip checksum */  in ext4_group_desc_csum()
3261 	if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size)  in ext4_group_desc_csum()
3263 			    sbi->s_desc_size - offset);  in ext4_group_desc_csum()
3273 	    (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp)))  in ext4_group_desc_csum_verify()
3284 	gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp);  in ext4_group_desc_csum_set()
3287 /* Called at mount-time, super-block is locked */
3293 	ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);  in ext4_check_descriptors()
3300 	ext4_group_t i, grp = sbi->s_groups_count;  in ext4_check_descriptors()
3307 	for (i = 0; i < sbi->s_groups_count; i++) {  in ext4_check_descriptors()
3310 		if (i == sbi->s_groups_count - 1 || flexbg_flag)  in ext4_check_descriptors()
3311 			last_block = ext4_blocks_count(sbi->s_es) - 1;  in ext4_check_descriptors()
3314 				(EXT4_BLOCKS_PER_GROUP(sb) - 1);  in ext4_check_descriptors()
3316 		if ((grp == sbi->s_groups_count) &&  in ext4_check_descriptors()
3317 		   !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_check_descriptors()
3381 		    inode_table + sbi->s_itb_per_group - 1 > last_block) {  in ext4_check_descriptors()
3392 				     gdp)), le16_to_cpu(gdp->bg_checksum));  in ext4_check_descriptors()
3409  * Resulting logical blkno at s_maxbytes must fit in our on-disk
3416  * covering maximum file size must fit into on-disk format containers as
3430 		upper_limit = (1LL << 32) - 1;  in ext4_max_size()
3433 		upper_limit >>= (blkbits - 9);  in ext4_max_size()
3438 	 * 32-bit extent-start container, ee_block. We lower the maxbytes  in ext4_max_size()
3442 	res = (1LL << 32) - 1;  in ext4_max_size()
3445 	/* Sanity check against vm- & vfs- imposed limits */  in ext4_max_size()
3453  * Maximal bitmap file size.  There is a direct, and {,double-,triple-}indirect
3454  * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks.
3461 	unsigned int ppb = 1 << (bits - 2);  in ext4_max_bitmap_size()
3465 	 * mapped file such that the file's total number of 512-byte sectors,  in ext4_max_bitmap_size()
3466 	 * including data and all indirect blocks, does not exceed (2^48 - 1).  in ext4_max_bitmap_size()
3469 	 * number of 512-byte sectors of the file.  in ext4_max_bitmap_size()
3474 		 * represents total file blocks in 2^32 512-byte sectors ==  in ext4_max_bitmap_size()
3477 		upper_limit = (1LL << 32) - 1;  in ext4_max_bitmap_size()
3480 		upper_limit >>= (bits - 9);  in ext4_max_bitmap_size()
3489 		upper_limit = (1LL << 48) - 1;  in ext4_max_bitmap_size()
3507 	upper_limit -= EXT4_NDIR_BLOCKS;  in ext4_max_bitmap_size()
3510 	upper_limit -= ppb;  in ext4_max_bitmap_size()
3514 		res -= meta_blocks;  in ext4_max_bitmap_size()
3518 	upper_limit -= ppb * ppb;  in ext4_max_bitmap_size()
3522 	res -= meta_blocks;  in ext4_max_bitmap_size()
3538 	first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);  in descriptor_loc()
3542 	bg = sbi->s_desc_per_block * nr;  in descriptor_loc()
3552 	if (sb->s_blocksize == 1024 && nr == 0 &&  in descriptor_loc()
3553 	    le32_to_cpu(sbi->s_es->s_first_data_block) == 0)  in descriptor_loc()
3572 	unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride);  in ext4_get_stripe_size()
3574 			le32_to_cpu(sbi->s_es->s_raid_stripe_width);  in ext4_get_stripe_size()
3577 	if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3578 		ret = sbi->s_stripe;  in ext4_get_stripe_size()
3579 	else if (stripe_width && stripe_width <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3581 	else if (stride && stride <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3608 			(le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) &  in ext4_feature_set_ok()
3626 		ext4_msg(sb, KERN_INFO, "filesystem is read-only");  in ext4_feature_set_ok()
3627 		sb->s_flags |= SB_RDONLY;  in ext4_feature_set_ok()
3631 	/* Check that feature set is OK for a read-write mount */  in ext4_feature_set_ok()
3635 			 (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) &  in ext4_feature_set_ok()
3664 	struct super_block *sb = sbi->s_sb;  in print_daily_error_info()
3665 	struct ext4_super_block *es = sbi->s_es;  in print_daily_error_info()  local
3667 	if (es->s_error_count)  in print_daily_error_info()
3670 			 le32_to_cpu(es->s_error_count));  in print_daily_error_info()
3671 	if (es->s_first_error_time) {  in print_daily_error_info()
3672 		printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d",  in print_daily_error_info()
3673 		       sb->s_id,  in print_daily_error_info()
3674 		       ext4_get_tstamp(es, s_first_error_time),  in print_daily_error_info()
3675 		       (int) sizeof(es->s_first_error_func),  in print_daily_error_info()
3676 		       es->s_first_error_func,  in print_daily_error_info()
3677 		       le32_to_cpu(es->s_first_error_line));  in print_daily_error_info()
3678 		if (es->s_first_error_ino)  in print_daily_error_info()
3680 			       le32_to_cpu(es->s_first_error_ino));  in print_daily_error_info()
3681 		if (es->s_first_error_block)  in print_daily_error_info()
3683 			       le64_to_cpu(es->s_first_error_block));  in print_daily_error_info()
3686 	if (es->s_last_error_time) {  in print_daily_error_info()
3687 		printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d",  in print_daily_error_info()
3688 		       sb->s_id,  in print_daily_error_info()
3689 		       ext4_get_tstamp(es, s_last_error_time),  in print_daily_error_info()
3690 		       (int) sizeof(es->s_last_error_func),  in print_daily_error_info()
3691 		       es->s_last_error_func,  in print_daily_error_info()
3692 		       le32_to_cpu(es->s_last_error_line));  in print_daily_error_info()
3693 		if (es->s_last_error_ino)  in print_daily_error_info()
3695 			       le32_to_cpu(es->s_last_error_ino));  in print_daily_error_info()
3696 		if (es->s_last_error_block)  in print_daily_error_info()
3698 			       le64_to_cpu(es->s_last_error_block));  in print_daily_error_info()
3701 	mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);  /* Once a day */  in print_daily_error_info()
3708 	struct super_block *sb = elr->lr_super;  in ext4_run_li_request()
3709 	ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;  in ext4_run_li_request()
3710 	ext4_group_t group = elr->lr_next_group;  in ext4_run_li_request()
3713 	int nr = EXT4_SB(sb)->s_mb_prefetch;  in ext4_run_li_request()
3716 	if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) {  in ext4_run_li_request()
3717 		elr->lr_next_group = ext4_mb_prefetch(sb, group, nr, &prefetch_ios);  in ext4_run_li_request()
3718 		ext4_mb_prefetch_fini(sb, elr->lr_next_group, nr);  in ext4_run_li_request()
3719 		trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, nr);  in ext4_run_li_request()
3720 		if (group >= elr->lr_next_group) {  in ext4_run_li_request()
3722 			if (elr->lr_first_not_zeroed != ngroups &&  in ext4_run_li_request()
3724 				elr->lr_next_group = elr->lr_first_not_zeroed;  in ext4_run_li_request()
3725 				elr->lr_mode = EXT4_LI_MODE_ITABLE;  in ext4_run_li_request()
3739 		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_run_li_request()
3749 					    elr->lr_timeout ? 0 : 1);  in ext4_run_li_request()
3751 		if (elr->lr_timeout == 0) {  in ext4_run_li_request()
3752 			elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) *  in ext4_run_li_request()
3753 				EXT4_SB(elr->lr_super)->s_li_wait_mult);  in ext4_run_li_request()
3755 		elr->lr_next_sched = jiffies + elr->lr_timeout;  in ext4_run_li_request()
3756 		elr->lr_next_group = group + 1;  in ext4_run_li_request()
3770 	list_del(&elr->lr_request);  in ext4_remove_li_request()
3771 	EXT4_SB(elr->lr_super)->s_li_request = NULL;  in ext4_remove_li_request()
3783 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_unregister_li_request()
3784 	ext4_remove_li_request(EXT4_SB(sb)->s_li_request);  in ext4_unregister_li_request()
3785 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_unregister_li_request()
3814 		mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3815 		if (list_empty(&eli->li_request_list)) {  in ext4_lazyinit_thread()
3816 			mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3819 		list_for_each_safe(pos, n, &eli->li_request_list) {  in ext4_lazyinit_thread()
3825 			if (time_before(jiffies, elr->lr_next_sched)) {  in ext4_lazyinit_thread()
3826 				if (time_before(elr->lr_next_sched, next_wakeup))  in ext4_lazyinit_thread()
3827 					next_wakeup = elr->lr_next_sched;  in ext4_lazyinit_thread()
3830 			if (down_read_trylock(&elr->lr_super->s_umount)) {  in ext4_lazyinit_thread()
3831 				if (sb_start_write_trylock(elr->lr_super)) {  in ext4_lazyinit_thread()
3834 					 * We hold sb->s_umount, sb can not  in ext4_lazyinit_thread()
3838 					mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3840 					sb_end_write(elr->lr_super);  in ext4_lazyinit_thread()
3841 					mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3842 					n = pos->next;  in ext4_lazyinit_thread()
3844 				up_read((&elr->lr_super->s_umount));  in ext4_lazyinit_thread()
3852 				elr->lr_next_sched = jiffies +  in ext4_lazyinit_thread()
3855 			if (time_before(elr->lr_next_sched, next_wakeup))  in ext4_lazyinit_thread()
3856 				next_wakeup = elr->lr_next_sched;  in ext4_lazyinit_thread()
3858 		mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3869 		schedule_timeout_interruptible(next_wakeup - cur);  in ext4_lazyinit_thread()
3887 	mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3888 	if (!list_empty(&eli->li_request_list)) {  in ext4_lazyinit_thread()
3889 		mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3893 	mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3906 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_clear_request_list()
3907 	list_for_each_safe(pos, n, &ext4_li_info->li_request_list) {  in ext4_clear_request_list()
3912 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_clear_request_list()
3924 		printk(KERN_CRIT "EXT4-fs: error %d creating inode table "  in ext4_run_lazyinit_thread()
3929 	ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING;  in ext4_run_lazyinit_thread()
3941 	ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count;  in ext4_has_uninit_itable()
3952 		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_has_uninit_itable()
3965 		return -ENOMEM;  in ext4_li_info_new()
3967 	INIT_LIST_HEAD(&eli->li_request_list);  in ext4_li_info_new()
3968 	mutex_init(&eli->li_list_mtx);  in ext4_li_info_new()
3970 	eli->li_state |= EXT4_LAZYINIT_QUIT;  in ext4_li_info_new()
3986 	elr->lr_super = sb;  in ext4_li_request_new()
3987 	elr->lr_first_not_zeroed = start;  in ext4_li_request_new()
3989 		elr->lr_mode = EXT4_LI_MODE_ITABLE;  in ext4_li_request_new()
3990 		elr->lr_next_group = start;  in ext4_li_request_new()
3992 		elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP;  in ext4_li_request_new()
4000 	elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);  in ext4_li_request_new()
4009 	ext4_group_t ngroups = sbi->s_groups_count;  in ext4_register_li_request()
4013 	if (sbi->s_li_request != NULL) {  in ext4_register_li_request()
4018 		sbi->s_li_request->lr_timeout = 0;  in ext4_register_li_request()
4029 		ret = -ENOMEM;  in ext4_register_li_request()
4039 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_register_li_request()
4040 	list_add(&elr->lr_request, &ext4_li_info->li_request_list);  in ext4_register_li_request()
4041 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_register_li_request()
4043 	sbi->s_li_request = elr;  in ext4_register_li_request()
4051 	if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) {  in ext4_register_li_request()
4095 	jbd2_journal_clear_features(sbi->s_journal,  in set_journal_csum_feature_set()
4100 		ret = jbd2_journal_set_features(sbi->s_journal,  in set_journal_csum_feature_set()
4105 		ret = jbd2_journal_set_features(sbi->s_journal,  in set_journal_csum_feature_set()
4108 		jbd2_journal_clear_features(sbi->s_journal, 0, 0,  in set_journal_csum_feature_set()
4111 		jbd2_journal_clear_features(sbi->s_journal, 0, 0,  in set_journal_csum_feature_set()
4126  * older file systems --- and if we come across with a bigalloc file
4128  * correct especially for very large cluster sizes --- but for newer
4131  * present (even for non-bigalloc file systems), we will use it.
4145 			(has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) +  in count_overhead()
4146 			sbi->s_itb_per_group + 2);  in count_overhead()
4148 	first_block = le32_to_cpu(sbi->s_es->s_first_data_block) +  in count_overhead()
4150 	last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1;  in count_overhead()
4155 			ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);  in count_overhead()
4160 			ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);  in count_overhead()
4164 		if (b >= first_block && b + sbi->s_itb_per_group <= last_block)  in count_overhead()
4165 			for (j = 0; j < sbi->s_itb_per_group; j++, b++) {  in count_overhead()
4166 				int c = EXT4_B2C(sbi, b - first_block);  in count_overhead()
4181 			j = EXT4_BLOCKS_PER_GROUP(sb) - s;  in count_overhead()
4184 		for (; j > 0; j--)  in count_overhead()
4189 	return EXT4_CLUSTERS_PER_GROUP(sb) -  in count_overhead()
4194  * Compute the overhead and stash it in sbi->s_overhead
4199 	struct ext4_super_block *es = sbi->s_es;  in ext4_calculate_overhead()  local
4201 	unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum);  in ext4_calculate_overhead()
4207 		return -ENOMEM;  in ext4_calculate_overhead()
4218 	overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block));  in ext4_calculate_overhead()
4237 	if (sbi->s_journal && !sbi->s_journal_bdev)  in ext4_calculate_overhead()
4238 		overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len);  in ext4_calculate_overhead()
4239 	else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {  in ext4_calculate_overhead()
4240 		/* j_inum for internal journal is non-zero */  in ext4_calculate_overhead()
4243 			j_blocks = j_inode->i_size >> sb->s_blocksize_bits;  in ext4_calculate_overhead()
4250 	sbi->s_overhead = overhead;  in ext4_calculate_overhead()
4277 	resv_clusters = (ext4_blocks_count(sbi->s_es) >>  in ext4_set_resv_clusters()
4278 			 sbi->s_cluster_bits);  in ext4_set_resv_clusters()
4283 	atomic64_set(&sbi->s_resv_clusters, resv_clusters);  in ext4_set_resv_clusters()
4292 	if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb))  in ext4_quota_mode()
4311 	sbi->s_journal_triggers[type].sb = sb;  in ext4_setup_csum_trigger()
4312 	sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger;  in ext4_setup_csum_trigger()
4320 	kfree(sbi->s_blockgroup_lock);  in ext4_free_sbi()
4321 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_free_sbi()
4333 	sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off,  in ext4_alloc_sbi()
4336 	sbi->s_blockgroup_lock =  in ext4_alloc_sbi()
4339 	if (!sbi->s_blockgroup_lock)  in ext4_alloc_sbi()
4342 	sb->s_fs_info = sbi;  in ext4_alloc_sbi()
4343 	sbi->s_sb = sb;  in ext4_alloc_sbi()
4346 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_alloc_sbi()
4352 			      struct ext4_super_block *es)  in ext4_set_def_opts()  argument
4357 	def_mount_opts = le32_to_cpu(es->s_default_mount_opts);  in ext4_set_def_opts()
4372 	/* don't forget to enable journal_csum when metadata_csum is enabled. */  in ext4_set_def_opts()
4383 	if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC)  in ext4_set_def_opts()
4385 	else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE)  in ext4_set_def_opts()
4398 	 * enable delayed allocation by default  in ext4_set_def_opts()
4399 	 * Use -o nodelalloc to turn it off  in ext4_set_def_opts()
4405 	if (sb->s_blocksize == PAGE_SIZE)  in ext4_set_def_opts()
4412 	struct ext4_super_block *es = sbi->s_es;  in ext4_handle_clustersize()  local
4416 	clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size);  in ext4_handle_clustersize()
4418 		if (clustersize < sb->s_blocksize) {  in ext4_handle_clustersize()
4421 				 "block size (%lu)", clustersize, sb->s_blocksize);  in ext4_handle_clustersize()
4422 			return -EINVAL;  in ext4_handle_clustersize()
4424 		sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) -  in ext4_handle_clustersize()
4425 			le32_to_cpu(es->s_log_block_size);  in ext4_handle_clustersize()
4426 		sbi->s_clusters_per_group =  in ext4_handle_clustersize()
4427 			le32_to_cpu(es->s_clusters_per_group);  in ext4_handle_clustersize()
4428 		if (sbi->s_clusters_per_group > sb->s_blocksize * 8) {  in ext4_handle_clustersize()
4431 				 sbi->s_clusters_per_group);  in ext4_handle_clustersize()
4432 			return -EINVAL;  in ext4_handle_clustersize()
4434 		if (sbi->s_blocks_per_group !=  in ext4_handle_clustersize()
4435 		    (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) {  in ext4_handle_clustersize()
4438 				 sbi->s_blocks_per_group,  in ext4_handle_clustersize()
4439 				 sbi->s_clusters_per_group);  in ext4_handle_clustersize()
4440 			return -EINVAL;  in ext4_handle_clustersize()
4443 		if (clustersize != sb->s_blocksize) {  in ext4_handle_clustersize()
4446 				 "block size (%lu)", clustersize, sb->s_blocksize);  in ext4_handle_clustersize()
4447 			return -EINVAL;  in ext4_handle_clustersize()
4449 		if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {  in ext4_handle_clustersize()
4452 				 sbi->s_blocks_per_group);  in ext4_handle_clustersize()
4453 			return -EINVAL;  in ext4_handle_clustersize()
4455 		sbi->s_clusters_per_group = sbi->s_blocks_per_group;  in ext4_handle_clustersize()
4456 		sbi->s_cluster_bits = 0;  in ext4_handle_clustersize()
4458 	sbi->s_cluster_ratio = clustersize / sb->s_blocksize;  in ext4_handle_clustersize()
4461 	if (sbi->s_blocks_per_group == clustersize << 3)  in ext4_handle_clustersize()
4472 	atomic_set(&sbi->s_fc_subtid, 0);  in ext4_fast_commit_init()
4473 	INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);  in ext4_fast_commit_init()
4474 	INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);  in ext4_fast_commit_init()
4475 	INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);  in ext4_fast_commit_init()
4476 	INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);  in ext4_fast_commit_init()
4477 	sbi->s_fc_bytes = 0;  in ext4_fast_commit_init()
4479 	sbi->s_fc_ineligible_tid = 0;  in ext4_fast_commit_init()
4480 	spin_lock_init(&sbi->s_fc_lock);  in ext4_fast_commit_init()
4481 	memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats));  in ext4_fast_commit_init()
4482 	sbi->s_fc_replay_state.fc_regions = NULL;  in ext4_fast_commit_init()
4483 	sbi->s_fc_replay_state.fc_regions_size = 0;  in ext4_fast_commit_init()
4484 	sbi->s_fc_replay_state.fc_regions_used = 0;  in ext4_fast_commit_init()
4485 	sbi->s_fc_replay_state.fc_regions_valid = 0;  in ext4_fast_commit_init()
4486 	sbi->s_fc_replay_state.fc_modified_inodes = NULL;  in ext4_fast_commit_init()
4487 	sbi->s_fc_replay_state.fc_modified_inodes_size = 0;  in ext4_fast_commit_init()
4488 	sbi->s_fc_replay_state.fc_modified_inodes_used = 0;  in ext4_fast_commit_init()
4492 				struct ext4_super_block *es)  in ext4_inode_info_init()  argument
4496 	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {  in ext4_inode_info_init()
4497 		sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;  in ext4_inode_info_init()
4498 		sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;  in ext4_inode_info_init()
4500 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);  in ext4_inode_info_init()
4501 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);  in ext4_inode_info_init()
4502 		if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) {  in ext4_inode_info_init()
4504 				 sbi->s_first_ino);  in ext4_inode_info_init()
4505 			return -EINVAL;  in ext4_inode_info_init()
4507 		if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||  in ext4_inode_info_init()
4508 		    (!is_power_of_2(sbi->s_inode_size)) ||  in ext4_inode_info_init()
4509 		    (sbi->s_inode_size > sb->s_blocksize)) {  in ext4_inode_info_init()
4512 			       sbi->s_inode_size);  in ext4_inode_info_init()
4513 			ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize);  in ext4_inode_info_init()
4514 			return -EINVAL;  in ext4_inode_info_init()
4522 		if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +  in ext4_inode_info_init()
4523 			sizeof(((struct ext4_inode *)0)->i_atime_extra)) {  in ext4_inode_info_init()
4524 			sb->s_time_gran = 1;  in ext4_inode_info_init()
4525 			sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;  in ext4_inode_info_init()
4527 			sb->s_time_gran = NSEC_PER_SEC;  in ext4_inode_info_init()
4528 			sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;  in ext4_inode_info_init()
4530 		sb->s_time_min = EXT4_TIMESTAMP_MIN;  in ext4_inode_info_init()
4533 	if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {  in ext4_inode_info_init()
4534 		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -  in ext4_inode_info_init()
4537 			unsigned v, max = (sbi->s_inode_size -  in ext4_inode_info_init()
4540 			v = le16_to_cpu(es->s_want_extra_isize);  in ext4_inode_info_init()
4544 				return -EINVAL;  in ext4_inode_info_init()
4546 			if (sbi->s_want_extra_isize < v)  in ext4_inode_info_init()
4547 				sbi->s_want_extra_isize = v;  in ext4_inode_info_init()
4549 			v = le16_to_cpu(es->s_min_extra_isize);  in ext4_inode_info_init()
4553 				return -EINVAL;  in ext4_inode_info_init()
4555 			if (sbi->s_want_extra_isize < v)  in ext4_inode_info_init()
4556 				sbi->s_want_extra_isize = v;  in ext4_inode_info_init()
4564 static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)  in ext4_encoding_init()  argument
4568 	__u16 encoding_flags = le16_to_cpu(es->s_encoding_flags);  in ext4_encoding_init()
4570 	if (!ext4_has_feature_casefold(sb) || sb->s_encoding)  in ext4_encoding_init()
4573 	encoding_info = ext4_sb_read_encoding(es);  in ext4_encoding_init()
4577 		return -EINVAL;  in ext4_encoding_init()
4580 	encoding = utf8_load(encoding_info->version);  in ext4_encoding_init()
4583 			"can't mount with superblock charset: %s-%u.%u.%u "  in ext4_encoding_init()
4585 			encoding_info->name,  in ext4_encoding_init()
4586 			unicode_major(encoding_info->version),  in ext4_encoding_init()
4587 			unicode_minor(encoding_info->version),  in ext4_encoding_init()
4588 			unicode_rev(encoding_info->version),  in ext4_encoding_init()
4590 		return -EINVAL;  in ext4_encoding_init()
4593 		"%s-%u.%u.%u with flags 0x%hx", encoding_info->name,  in ext4_encoding_init()
4594 		unicode_major(encoding_info->version),  in ext4_encoding_init()
4595 		unicode_minor(encoding_info->version),  in ext4_encoding_init()
4596 		unicode_rev(encoding_info->version),  in ext4_encoding_init()
4599 	sb->s_encoding = encoding;  in ext4_encoding_init()
4600 	sb->s_encoding_flags = encoding_flags;  in ext4_encoding_init()
4605 static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)  in ext4_encoding_init()  argument
4611 static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es)  in ext4_init_metadata_csum()  argument
4622 	if (!ext4_verify_csum_type(sb, es)) {  in ext4_init_metadata_csum()
4625 		return -EINVAL;  in ext4_init_metadata_csum()
4631 	sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);  in ext4_init_metadata_csum()
4632 	if (IS_ERR(sbi->s_chksum_driver)) {  in ext4_init_metadata_csum()
4633 		int ret = PTR_ERR(sbi->s_chksum_driver);  in ext4_init_metadata_csum()
4635 		sbi->s_chksum_driver = NULL;  in ext4_init_metadata_csum()
4640 	if (!ext4_superblock_csum_verify(sb, es)) {  in ext4_init_metadata_csum()
4643 		return -EFSBADCRC;  in ext4_init_metadata_csum()
4648 		sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed);  in ext4_init_metadata_csum()
4650 		sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,  in ext4_init_metadata_csum()
4651 					       sizeof(es->s_uuid));  in ext4_init_metadata_csum()
4656 					    struct ext4_super_block *es,  in ext4_check_feature_compatibility()  argument
4661 	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV &&  in ext4_check_feature_compatibility()
4669 	if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) {  in ext4_check_feature_compatibility()
4673 				 "The Hurd can't support 64-bit file systems");  in ext4_check_feature_compatibility()
4674 			return -EINVAL;  in ext4_check_feature_compatibility()
4684 			return -EINVAL;  in ext4_check_feature_compatibility()
4698 				return -EINVAL;  in ext4_check_feature_compatibility()
4701 			return -EINVAL;  in ext4_check_feature_compatibility()
4715 				return -EINVAL;  in ext4_check_feature_compatibility()
4718 			return -EINVAL;  in ext4_check_feature_compatibility()
4728 		return -EINVAL;  in ext4_check_feature_compatibility()
4730 	if (sbi->s_daxdev) {  in ext4_check_feature_compatibility()
4731 		if (sb->s_blocksize == PAGE_SIZE)  in ext4_check_feature_compatibility()
4732 			set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);  in ext4_check_feature_compatibility()
4737 	if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {  in ext4_check_feature_compatibility()
4741 			return -EINVAL;  in ext4_check_feature_compatibility()
4743 		if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) {  in ext4_check_feature_compatibility()
4746 			return -EINVAL;  in ext4_check_feature_compatibility()
4750 	if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {  in ext4_check_feature_compatibility()
4752 			 es->s_encryption_level);  in ext4_check_feature_compatibility()
4753 		return -EINVAL;  in ext4_check_feature_compatibility()
4760 			       struct ext4_super_block *es)  in ext4_check_geometry()  argument
4766 	if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) {  in ext4_check_geometry()
4769 			 le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks));  in ext4_check_geometry()
4770 		return -EINVAL;  in ext4_check_geometry()
4776 	err = generic_check_addressable(sb->s_blocksize_bits,  in ext4_check_geometry()
4777 					ext4_blocks_count(es));  in ext4_check_geometry()
4786 	if (blocks_count && ext4_blocks_count(es) > blocks_count) {  in ext4_check_geometry()
4789 		       ext4_blocks_count(es), blocks_count);  in ext4_check_geometry()
4790 		return -EINVAL;  in ext4_check_geometry()
4797 	if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) {  in ext4_check_geometry()
4800 			 le32_to_cpu(es->s_first_data_block),  in ext4_check_geometry()
4801 			 ext4_blocks_count(es));  in ext4_check_geometry()
4802 		return -EINVAL;  in ext4_check_geometry()
4804 	if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) &&  in ext4_check_geometry()
4805 	    (sbi->s_cluster_ratio == 1)) {  in ext4_check_geometry()
4808 		return -EINVAL;  in ext4_check_geometry()
4811 	blocks_count = (ext4_blocks_count(es) -  in ext4_check_geometry()
4812 			le32_to_cpu(es->s_first_data_block) +  in ext4_check_geometry()
4813 			EXT4_BLOCKS_PER_GROUP(sb) - 1);  in ext4_check_geometry()
4815 	if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) {  in ext4_check_geometry()
4819 		       ext4_blocks_count(es),  in ext4_check_geometry()
4820 		       le32_to_cpu(es->s_first_data_block),  in ext4_check_geometry()
4822 		return -EINVAL;  in ext4_check_geometry()
4824 	sbi->s_groups_count = blocks_count;  in ext4_check_geometry()
4825 	sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,  in ext4_check_geometry()
4827 	if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) !=  in ext4_check_geometry()
4828 	    le32_to_cpu(es->s_inodes_count)) {  in ext4_check_geometry()
4830 			 le32_to_cpu(es->s_inodes_count),  in ext4_check_geometry()
4831 			 ((u64)sbi->s_groups_count * sbi->s_inodes_per_group));  in ext4_check_geometry()
4832 		return -EINVAL;  in ext4_check_geometry()
4839 				struct ext4_super_block *es,  in ext4_group_desc_init()  argument
4848 	db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /  in ext4_group_desc_init()
4851 		if (le32_to_cpu(es->s_first_meta_bg) > db_count) {  in ext4_group_desc_init()
4855 				 le32_to_cpu(es->s_first_meta_bg), db_count);  in ext4_group_desc_init()
4856 			return -EINVAL;  in ext4_group_desc_init()
4859 	rcu_assign_pointer(sbi->s_group_desc,  in ext4_group_desc_init()
4863 	if (sbi->s_group_desc == NULL) {  in ext4_group_desc_init()
4865 		return -ENOMEM;  in ext4_group_desc_init()
4868 	bgl_lock_init(sbi->s_blockgroup_lock);  in ext4_group_desc_init()
4870 	/* Pre-read the descriptors into the buffer cache */  in ext4_group_desc_init()
4884 			sbi->s_gdb_count = i;  in ext4_group_desc_init()
4888 		rcu_dereference(sbi->s_group_desc)[i] = bh;  in ext4_group_desc_init()
4891 	sbi->s_gdb_count = db_count;  in ext4_group_desc_init()
4894 		return -EFSCORRUPTED;  in ext4_group_desc_init()
4901 				      struct ext4_super_block *es,  in ext4_load_and_init_journal()  argument
4907 	err = ext4_load_journal(sb, es, ctx->journal_devnum);  in ext4_load_and_init_journal()
4912 	    !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,  in ext4_load_and_init_journal()
4914 		ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");  in ext4_load_and_init_journal()
4925 		!jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,  in ext4_load_and_init_journal()
4941 		    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {  in ext4_load_and_init_journal()
4943 			sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;  in ext4_load_and_init_journal()
4946 			sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;  in ext4_load_and_init_journal()
4953 		    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {  in ext4_load_and_init_journal()
4970 	set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);  in ext4_load_and_init_journal()
4972 	sbi->s_journal->j_submit_inode_data_buffers =  in ext4_load_and_init_journal()
4974 	sbi->s_journal->j_finish_inode_data_buffers =  in ext4_load_and_init_journal()
4981 	flush_work(&sbi->s_sb_upd_work);  in ext4_load_and_init_journal()
4982 	jbd2_journal_destroy(sbi->s_journal);  in ext4_load_and_init_journal()
4983 	sbi->s_journal = NULL;  in ext4_load_and_init_journal()
4984 	return -EINVAL;  in ext4_load_and_init_journal()
4990 		printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with "  in ext4_check_journal_data_mode()
4999 			return -EINVAL;  in ext4_check_journal_data_mode()
5004 			return -EINVAL;  in ext4_check_journal_data_mode()
5014 		sb->s_iflags |= SB_I_CGROUPWB;  in ext4_check_journal_data_mode()
5024 	struct ext4_super_block *es;  in ext4_load_super()  local
5028 	int ret = -EINVAL;  in ext4_load_super()
5034 		return -EINVAL;  in ext4_load_super()
5042 		logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;  in ext4_load_super()
5045 		logical_sb_block = sbi->s_sb_block;  in ext4_load_super()
5055 	 *       some ext4 macro-instructions depend on its value  in ext4_load_super()
5057 	es = (struct ext4_super_block *) (bh->b_data + offset);  in ext4_load_super()
5058 	sbi->s_es = es;  in ext4_load_super()
5059 	sb->s_magic = le16_to_cpu(es->s_magic);  in ext4_load_super()
5060 	if (sb->s_magic != EXT4_SUPER_MAGIC) {  in ext4_load_super()
5066 	if (le32_to_cpu(es->s_log_block_size) >  in ext4_load_super()
5067 	    (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {  in ext4_load_super()
5070 			 le32_to_cpu(es->s_log_block_size));  in ext4_load_super()
5073 	if (le32_to_cpu(es->s_log_cluster_size) >  in ext4_load_super()
5074 	    (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {  in ext4_load_super()
5077 			 le32_to_cpu(es->s_log_cluster_size));  in ext4_load_super()
5081 	blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);  in ext4_load_super()
5087 	if (sb->s_blocksize == blocksize) {  in ext4_load_super()
5089 		sbi->s_sbh = bh;  in ext4_load_super()
5107 	logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;  in ext4_load_super()
5116 	es = (struct ext4_super_block *)(bh->b_data + offset);  in ext4_load_super()
5117 	sbi->s_es = es;  in ext4_load_super()
5118 	if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {  in ext4_load_super()
5123 	sbi->s_sbh = bh;  in ext4_load_super()
5133 	struct ext4_super_block *es = sbi->s_es;  in ext4_hash_info_init()  local
5137 		sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);  in ext4_hash_info_init()
5139 	sbi->s_def_hash_version = es->s_def_hash_version;  in ext4_hash_info_init()
5141 		i = le32_to_cpu(es->s_flags);  in ext4_hash_info_init()
5143 			sbi->s_hash_unsigned = 3;  in ext4_hash_info_init()
5147 				es->s_flags |=  in ext4_hash_info_init()
5149 			sbi->s_hash_unsigned = 3;  in ext4_hash_info_init()
5152 				es->s_flags |=  in ext4_hash_info_init()
5162 	struct ext4_super_block *es = sbi->s_es;  in ext4_block_group_meta_init()  local
5166 	sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,  in ext4_block_group_meta_init()
5168 	sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);  in ext4_block_group_meta_init()
5170 	sbi->s_desc_size = le16_to_cpu(es->s_desc_size);  in ext4_block_group_meta_init()
5172 		if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||  in ext4_block_group_meta_init()
5173 		    sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||  in ext4_block_group_meta_init()
5174 		    !is_power_of_2(sbi->s_desc_size)) {  in ext4_block_group_meta_init()
5177 			       sbi->s_desc_size);  in ext4_block_group_meta_init()
5178 			return -EINVAL;  in ext4_block_group_meta_init()
5181 		sbi->s_desc_size = EXT4_MIN_DESC_SIZE;  in ext4_block_group_meta_init()
5183 	sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);  in ext4_block_group_meta_init()
5184 	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);  in ext4_block_group_meta_init()
5186 	sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb);  in ext4_block_group_meta_init()
5187 	if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {  in ext4_block_group_meta_init()
5190 		return -EINVAL;  in ext4_block_group_meta_init()
5192 	if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||  in ext4_block_group_meta_init()
5193 	    sbi->s_inodes_per_group > sb->s_blocksize * 8) {  in ext4_block_group_meta_init()
5195 			 sbi->s_inodes_per_group);  in ext4_block_group_meta_init()
5196 		return -EINVAL;  in ext4_block_group_meta_init()
5198 	sbi->s_itb_per_group = sbi->s_inodes_per_group /  in ext4_block_group_meta_init()
5199 					sbi->s_inodes_per_block;  in ext4_block_group_meta_init()
5200 	sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb);  in ext4_block_group_meta_init()
5201 	sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY;  in ext4_block_group_meta_init()
5202 	sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));  in ext4_block_group_meta_init()
5203 	sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));  in ext4_block_group_meta_init()
5210 	struct ext4_super_block *es = NULL;  in __ext4_fill_super()  local
5217 	struct ext4_fs_context *ctx = fc->fs_private;  in __ext4_fill_super()
5218 	int silent = fc->sb_flags & SB_SILENT;  in __ext4_fill_super()
5221 	if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO))  in __ext4_fill_super()
5222 		ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;  in __ext4_fill_super()
5224 	sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;  in __ext4_fill_super()
5225 	sbi->s_sectors_written_start =  in __ext4_fill_super()
5226 		part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);  in __ext4_fill_super()
5232 	es = sbi->s_es;  in __ext4_fill_super()
5233 	sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);  in __ext4_fill_super()
5235 	err = ext4_init_metadata_csum(sb, es);  in __ext4_fill_super()
5239 	ext4_set_def_opts(sb, es);  in __ext4_fill_super()
5241 	sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));  in __ext4_fill_super()
5242 	sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));  in __ext4_fill_super()
5243 	sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ;  in __ext4_fill_super()
5244 	sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;  in __ext4_fill_super()
5245 	sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;  in __ext4_fill_super()
5251 	sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;  in __ext4_fill_super()
5253 	err = ext4_inode_info_init(sb, es);  in __ext4_fill_super()
5261 	sbi->s_def_mount_opt = sbi->s_mount_opt;  in __ext4_fill_super()
5262 	sbi->s_def_mount_opt2 = sbi->s_mount_opt2;  in __ext4_fill_super()
5270 	err = ext4_encoding_init(sb, es);  in __ext4_fill_super()
5278 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in __ext4_fill_super()
5282 	sb->s_flags |= SB_I_VERSION;  in __ext4_fill_super()
5284 	err = ext4_check_feature_compatibility(sb, es, silent);  in __ext4_fill_super()
5298 	err = ext4_check_geometry(sb, es);  in __ext4_fill_super()
5302 	timer_setup(&sbi->s_err_report, print_daily_error_info, 0);  in __ext4_fill_super()
5303 	spin_lock_init(&sbi->s_error_lock);  in __ext4_fill_super()
5304 	INIT_WORK(&sbi->s_sb_upd_work, update_super_work);  in __ext4_fill_super()
5306 	err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed);  in __ext4_fill_super()
5314 	sbi->s_stripe = ext4_get_stripe_size(sbi);  in __ext4_fill_super()
5320 	if (sbi->s_stripe > 0 && sbi->s_cluster_ratio > 1 &&  in __ext4_fill_super()
5321 	    sbi->s_stripe % sbi->s_cluster_ratio != 0) {  in __ext4_fill_super()
5325 			 sbi->s_stripe, sbi->s_cluster_ratio);  in __ext4_fill_super()
5326 		sbi->s_stripe = 0;  in __ext4_fill_super()
5328 	sbi->s_extent_max_zeroout_kb = 32;  in __ext4_fill_super()
5333 	sb->s_op = &ext4_sops;  in __ext4_fill_super()
5334 	sb->s_export_op = &ext4_export_ops;  in __ext4_fill_super()
5335 	sb->s_xattr = ext4_xattr_handlers;  in __ext4_fill_super()
5337 	sb->s_cop = &ext4_cryptops;  in __ext4_fill_super()
5340 	sb->s_vop = &ext4_verityops;  in __ext4_fill_super()
5343 	sb->dq_op = &ext4_quota_operations;  in __ext4_fill_super()
5345 		sb->s_qcop = &dquot_quotactl_sysfile_ops;  in __ext4_fill_super()
5347 		sb->s_qcop = &ext4_qctl_operations;  in __ext4_fill_super()
5348 	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;  in __ext4_fill_super()
5350 	memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));  in __ext4_fill_super()
5352 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */  in __ext4_fill_super()
5353 	mutex_init(&sbi->s_orphan_lock);  in __ext4_fill_super()
5357 	sb->s_root = NULL;  in __ext4_fill_super()
5359 	needs_recovery = (es->s_last_orphan != 0 ||  in __ext4_fill_super()
5364 		err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block));  in __ext4_fill_super()
5369 	err = -EINVAL;  in __ext4_fill_super()
5375 		err = ext4_load_and_init_journal(sb, es, ctx);  in __ext4_fill_super()
5381 		       "suppressed and not mounted read-only");  in __ext4_fill_super()
5396 		if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {  in __ext4_fill_super()
5399 				 sbi->s_commit_interval / HZ);  in __ext4_fill_super()
5403 		    (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {  in __ext4_fill_super()
5408 		sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;  in __ext4_fill_super()
5412 		sbi->s_journal = NULL;  in __ext4_fill_super()
5417 		sbi->s_ea_block_cache = ext4_xattr_create_cache();  in __ext4_fill_super()
5418 		if (!sbi->s_ea_block_cache) {  in __ext4_fill_super()
5421 			err = -EINVAL;  in __ext4_fill_super()
5426 			sbi->s_ea_inode_cache = ext4_xattr_create_cache();  in __ext4_fill_super()
5427 			if (!sbi->s_ea_inode_cache) {  in __ext4_fill_super()
5430 				err = -EINVAL;  in __ext4_fill_super()
5440 	sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters);  in __ext4_fill_super()
5442 	if (sbi->s_overhead > ext4_blocks_count(es))  in __ext4_fill_super()
5443 		sbi->s_overhead = 0;  in __ext4_fill_super()
5450 		sbi->s_overhead = 0;  in __ext4_fill_super()
5451 	if (sbi->s_overhead == 0) {  in __ext4_fill_super()
5461 	EXT4_SB(sb)->rsv_conversion_wq =  in __ext4_fill_super()
5462 		alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);  in __ext4_fill_super()
5463 	if (!EXT4_SB(sb)->rsv_conversion_wq) {  in __ext4_fill_super()
5464 		printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");  in __ext4_fill_super()
5465 		err = -ENOMEM;  in __ext4_fill_super()
5481 	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {  in __ext4_fill_super()
5484 		err = -EFSCORRUPTED;  in __ext4_fill_super()
5488 	sb->s_root = d_make_root(root);  in __ext4_fill_super()
5489 	if (!sb->s_root) {  in __ext4_fill_super()
5491 		err = -ENOMEM;  in __ext4_fill_super()
5495 	err = ext4_setup_super(sb, es, sb_rdonly(sb));  in __ext4_fill_super()
5496 	if (err == -EROFS) {  in __ext4_fill_super()
5497 		sb->s_flags |= SB_RDONLY;  in __ext4_fill_super()
5516 	 * Enable optimize_scan if number of groups is > threshold. This can be  in __ext4_fill_super()
5520 	if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) {  in __ext4_fill_super()
5521 		if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD)  in __ext4_fill_super()
5538 	if (sbi->s_journal)  in __ext4_fill_super()
5539 		sbi->s_journal->j_commit_callback =  in __ext4_fill_super()
5551 			err = -ENOMEM;  in __ext4_fill_super()
5567 	/* Enable quota usage during mount. */  in __ext4_fill_super()
5579 	spin_lock_init(&sbi->s_bdev_wb_lock);  in __ext4_fill_super()
5580 	errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err,  in __ext4_fill_super()
5581 				 &sbi->s_bdev_wb_err);  in __ext4_fill_super()
5582 	EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;  in __ext4_fill_super()
5583 	ext4_orphan_cleanup(sb, es);  in __ext4_fill_super()
5584 	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;  in __ext4_fill_super()
5595 		err = ext4_mark_recovery_complete(sb, es);  in __ext4_fill_super()
5600 	if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev))  in __ext4_fill_super()
5604 	if (es->s_error_count)  in __ext4_fill_super()
5605 		mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */  in __ext4_fill_super()
5607 	/* Enable message ratelimiting. Default is 10 messages per 5 secs. */  in __ext4_fill_super()
5608 	ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5609 	ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5610 	ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5611 	atomic_set(&sbi->s_warning_count, 0);  in __ext4_fill_super()
5612 	atomic_set(&sbi->s_msg_count, 0);  in __ext4_fill_super()
5622 	kobject_put(&sbi->s_kobj);  in __ext4_fill_super()
5633 	dput(sb->s_root);  in __ext4_fill_super()
5634 	sb->s_root = NULL;  in __ext4_fill_super()
5637 	if (EXT4_SB(sb)->rsv_conversion_wq)  in __ext4_fill_super()
5638 		destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);  in __ext4_fill_super()
5640 	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);  in __ext4_fill_super()
5641 	sbi->s_ea_inode_cache = NULL;  in __ext4_fill_super()
5643 	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);  in __ext4_fill_super()
5644 	sbi->s_ea_block_cache = NULL;  in __ext4_fill_super()
5646 	if (sbi->s_journal) {  in __ext4_fill_super()
5648 		flush_work(&sbi->s_sb_upd_work);  in __ext4_fill_super()
5649 		jbd2_journal_destroy(sbi->s_journal);  in __ext4_fill_super()
5650 		sbi->s_journal = NULL;  in __ext4_fill_super()
5656 	flush_work(&sbi->s_sb_upd_work);  in __ext4_fill_super()
5657 	del_timer_sync(&sbi->s_err_report);  in __ext4_fill_super()
5661 	if (sbi->s_chksum_driver)  in __ext4_fill_super()
5662 		crypto_free_shash(sbi->s_chksum_driver);  in __ext4_fill_super()
5665 	utf8_unload(sb->s_encoding);  in __ext4_fill_super()
5672 	fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);  in __ext4_fill_super()
5673 	brelse(sbi->s_sbh);  in __ext4_fill_super()
5674 	if (sbi->s_journal_bdev) {  in __ext4_fill_super()
5675 		invalidate_bdev(sbi->s_journal_bdev);  in __ext4_fill_super()
5676 		blkdev_put(sbi->s_journal_bdev, sb);  in __ext4_fill_super()
5679 	invalidate_bdev(sb->s_bdev);  in __ext4_fill_super()
5680 	sb->s_fs_info = NULL;  in __ext4_fill_super()
5686 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_fill_super()
5693 		return -ENOMEM;  in ext4_fill_super()
5695 	fc->s_fs_info = sbi;  in ext4_fill_super()
5698 	strreplace(sb->s_id, '/', '!');  in ext4_fill_super()
5700 	sbi->s_sb_block = 1;	/* Default super block location */  in ext4_fill_super()
5701 	if (ctx->spec & EXT4_SPEC_s_sb_block)  in ext4_fill_super()
5702 		sbi->s_sb_block = ctx->s_sb_block;  in ext4_fill_super()
5708 	if (sbi->s_journal) {  in ext4_fill_super()
5718 	if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))  in ext4_fill_super()
5720 			 "Quota mode: %s.", &sb->s_uuid,  in ext4_fill_super()
5730 	fc->s_fs_info = NULL;  in ext4_fill_super()
5740  * Setup any per-fs journal parameters now.  We'll do this both on
5748 	journal->j_commit_interval = sbi->s_commit_interval;  in ext4_init_journal_params()
5749 	journal->j_min_batch_time = sbi->s_min_batch_time;  in ext4_init_journal_params()
5750 	journal->j_max_batch_time = sbi->s_max_batch_time;  in ext4_init_journal_params()
5753 	write_lock(&journal->j_state_lock);  in ext4_init_journal_params()
5755 		journal->j_flags |= JBD2_BARRIER;  in ext4_init_journal_params()
5757 		journal->j_flags &= ~JBD2_BARRIER;  in ext4_init_journal_params()
5759 		journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR;  in ext4_init_journal_params()
5761 		journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR;  in ext4_init_journal_params()
5763 	 * Always enable journal cycle record option, letting the journal  in ext4_init_journal_params()
5766 	journal->j_flags |= JBD2_CYCLE_RECORD;  in ext4_init_journal_params()
5767 	write_unlock(&journal->j_state_lock);  in ext4_init_journal_params()
5785 	if (!journal_inode->i_nlink) {  in ext4_get_journal_inode()
5789 		return ERR_PTR(-EFSCORRUPTED);  in ext4_get_journal_inode()
5791 	if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) {  in ext4_get_journal_inode()
5794 		return ERR_PTR(-EFSCORRUPTED);  in ext4_get_journal_inode()
5798 		  journal_inode, journal_inode->i_size);  in ext4_get_journal_inode()
5807 	if (journal->j_inode == NULL)  in ext4_journal_bmap()
5812 	ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0);  in ext4_journal_bmap()
5814 		ext4_msg(journal->j_inode->i_sb, KERN_CRIT,  in ext4_journal_bmap()
5817 		jbd2_journal_abort(journal, ret ? ret : -EIO);  in ext4_journal_bmap()
5840 	journal->j_private = sb;  in ext4_open_inode_journal()
5841 	journal->j_bmap = ext4_journal_bmap;  in ext4_open_inode_journal()
5855 	struct ext4_super_block *es;  in ext4_get_journal_blkdev()  local
5859 	up_write(&sb->s_umount);  in ext4_get_journal_blkdev()
5862 	down_write(&sb->s_umount);  in ext4_get_journal_blkdev()
5865 			 "failed to open journal device unknown-block(%u,%u) %ld",  in ext4_get_journal_blkdev()
5870 	blocksize = sb->s_blocksize;  in ext4_get_journal_blkdev()
5875 		errno = -EINVAL;  in ext4_get_journal_blkdev()
5886 		errno = -EINVAL;  in ext4_get_journal_blkdev()
5890 	es = (struct ext4_super_block *) (bh->b_data + offset);  in ext4_get_journal_blkdev()
5891 	if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) ||  in ext4_get_journal_blkdev()
5892 	    !(le32_to_cpu(es->s_feature_incompat) &  in ext4_get_journal_blkdev()
5895 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5899 	if ((le32_to_cpu(es->s_feature_ro_compat) &  in ext4_get_journal_blkdev()
5901 	    es->s_checksum != ext4_superblock_csum(sb, es)) {  in ext4_get_journal_blkdev()
5903 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5907 	if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {  in ext4_get_journal_blkdev()
5909 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5914 	*j_len = ext4_blocks_count(es);  in ext4_get_journal_blkdev()
5938 	journal = jbd2_journal_init_dev(journal_bdev, sb->s_bdev, j_start,  in ext4_open_dev_journal()
5939 					j_len, sb->s_blocksize);  in ext4_open_dev_journal()
5945 	if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {  in ext4_open_dev_journal()
5947 					"user (unsupported) - %d",  in ext4_open_dev_journal()
5948 			be32_to_cpu(journal->j_superblock->s_nr_users));  in ext4_open_dev_journal()
5949 		errno = -EINVAL;  in ext4_open_dev_journal()
5952 	journal->j_private = sb;  in ext4_open_dev_journal()
5953 	EXT4_SB(sb)->s_journal_bdev = journal_bdev;  in ext4_open_dev_journal()
5965 			     struct ext4_super_block *es,  in ext4_load_journal()  argument
5969 	unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);  in ext4_load_journal()
5976 		return -EFSCORRUPTED;  in ext4_load_journal()
5979 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {  in ext4_load_journal()
5984 		journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));  in ext4_load_journal()
5989 		return -EINVAL;  in ext4_load_journal()
6002 	journal_dev_ro = bdev_read_only(journal->j_dev);  in ext4_load_journal()
6003 	really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro;  in ext4_load_journal()
6007 			 "journal device read-only, try mounting with '-o ro'");  in ext4_load_journal()
6008 		err = -EROFS;  in ext4_load_journal()
6015 	 * can get read-write access to the device.  in ext4_load_journal()
6025 				err = -EROFS;  in ext4_load_journal()
6033 	if (!(journal->j_flags & JBD2_BARRIER))  in ext4_load_journal()
6044 			memcpy(save, ((char *) es) +  in ext4_load_journal()
6047 		if (save && memcmp(((char *) es) + EXT4_S_ERR_START,  in ext4_load_journal()
6049 			memcpy(((char *) es) + EXT4_S_ERR_START,  in ext4_load_journal()
6054 		orig_state = es->s_state;  in ext4_load_journal()
6055 		es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state &  in ext4_load_journal()
6057 		if (orig_state != es->s_state)  in ext4_load_journal()
6072 	EXT4_SB(sb)->s_journal = journal;  in ext4_load_journal()
6073 	err = ext4_clear_journal_err(sb, es);  in ext4_load_journal()
6075 		EXT4_SB(sb)->s_journal = NULL;  in ext4_load_journal()
6081 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {  in ext4_load_journal()
6082 		es->s_journal_dev = cpu_to_le32(journal_devnum);  in ext4_load_journal()
6086 	    journal_inum != le32_to_cpu(es->s_journal_inum)) {  in ext4_load_journal()
6087 		es->s_journal_inum = cpu_to_le32(journal_inum);  in ext4_load_journal()
6098 /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */
6102 	struct ext4_super_block *es = sbi->s_es;  in ext4_update_super()  local
6103 	struct buffer_head *sbh = sbi->s_sbh;  in ext4_update_super()
6107 	 * If the file system is mounted read-only, don't update the  in ext4_update_super()
6112 	 * tick in localtime for Windows bug-for-bug compatibility,  in ext4_update_super()
6117 		ext4_update_tstamp(es, s_wtime);  in ext4_update_super()
6118 	es->s_kbytes_written =  in ext4_update_super()
6119 		cpu_to_le64(sbi->s_kbytes_written +  in ext4_update_super()
6120 		    ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -  in ext4_update_super()
6121 		      sbi->s_sectors_written_start) >> 1));  in ext4_update_super()
6122 	if (percpu_counter_initialized(&sbi->s_freeclusters_counter))  in ext4_update_super()
6123 		ext4_free_blocks_count_set(es,  in ext4_update_super()
6125 				&sbi->s_freeclusters_counter)));  in ext4_update_super()
6126 	if (percpu_counter_initialized(&sbi->s_freeinodes_counter))  in ext4_update_super()
6127 		es->s_free_inodes_count =  in ext4_update_super()
6129 				&sbi->s_freeinodes_counter));  in ext4_update_super()
6130 	/* Copy error information to the on-disk superblock */  in ext4_update_super()
6131 	spin_lock(&sbi->s_error_lock);  in ext4_update_super()
6132 	if (sbi->s_add_error_count > 0) {  in ext4_update_super()
6133 		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);  in ext4_update_super()
6134 		if (!es->s_first_error_time && !es->s_first_error_time_hi) {  in ext4_update_super()
6135 			__ext4_update_tstamp(&es->s_first_error_time,  in ext4_update_super()
6136 					     &es->s_first_error_time_hi,  in ext4_update_super()
6137 					     sbi->s_first_error_time);  in ext4_update_super()
6138 			strncpy(es->s_first_error_func, sbi->s_first_error_func,  in ext4_update_super()
6139 				sizeof(es->s_first_error_func));  in ext4_update_super()
6140 			es->s_first_error_line =  in ext4_update_super()
6141 				cpu_to_le32(sbi->s_first_error_line);  in ext4_update_super()
6142 			es->s_first_error_ino =  in ext4_update_super()
6143 				cpu_to_le32(sbi->s_first_error_ino);  in ext4_update_super()
6144 			es->s_first_error_block =  in ext4_update_super()
6145 				cpu_to_le64(sbi->s_first_error_block);  in ext4_update_super()
6146 			es->s_first_error_errcode =  in ext4_update_super()
6147 				ext4_errno_to_code(sbi->s_first_error_code);  in ext4_update_super()
6149 		__ext4_update_tstamp(&es->s_last_error_time,  in ext4_update_super()
6150 				     &es->s_last_error_time_hi,  in ext4_update_super()
6151 				     sbi->s_last_error_time);  in ext4_update_super()
6152 		strncpy(es->s_last_error_func, sbi->s_last_error_func,  in ext4_update_super()
6153 			sizeof(es->s_last_error_func));  in ext4_update_super()
6154 		es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line);  in ext4_update_super()
6155 		es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino);  in ext4_update_super()
6156 		es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block);  in ext4_update_super()
6157 		es->s_last_error_errcode =  in ext4_update_super()
6158 				ext4_errno_to_code(sbi->s_last_error_code);  in ext4_update_super()
6163 		if (!es->s_error_count)  in ext4_update_super()
6164 			mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);  in ext4_update_super()
6165 		le32_add_cpu(&es->s_error_count, sbi->s_add_error_count);  in ext4_update_super()
6166 		sbi->s_add_error_count = 0;  in ext4_update_super()
6168 	spin_unlock(&sbi->s_error_lock);  in ext4_update_super()
6176 	struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;  in ext4_commit_super()
6179 		return -EINVAL;  in ext4_commit_super()
6181 		return -ENODEV;  in ext4_commit_super()
6189 		return -EIO;  in ext4_commit_super()
6209 	sbh->b_end_io = end_buffer_write_sync;  in ext4_commit_super()
6218 		return -EIO;  in ext4_commit_super()
6229 				       struct ext4_super_block *es)  in ext4_mark_recovery_complete()  argument
6232 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_mark_recovery_complete()
6238 			return -EFSCORRUPTED;  in ext4_mark_recovery_complete()
6250 			ext4_error(sb, "Orphan file not empty on read-only fs.");  in ext4_mark_recovery_complete()
6251 			err = -EFSCORRUPTED;  in ext4_mark_recovery_complete()
6264  * If we are mounting (or read-write remounting) a filesystem whose journal
6269 				   struct ext4_super_block *es)  in ext4_clear_journal_err()  argument
6277 		return -EFSCORRUPTED;  in ext4_clear_journal_err()
6280 	journal = EXT4_SB(sb)->s_journal;  in ext4_clear_journal_err()
6295 		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in ext4_clear_journal_err()
6296 		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);  in ext4_clear_journal_err()
6314 	return ext4_journal_force_commit(EXT4_SB(sb)->s_journal);  in ext4_force_commit()
6328 	flush_workqueue(sbi->rsv_conversion_wq);  in ext4_sync_fs()
6330 	 * Writeback quota in non-journalled quota case - journalled quota has  in ext4_sync_fs()
6333 	dquot_writeback_dquots(sb, -1);  in ext4_sync_fs()
6339 	if (sbi->s_journal) {  in ext4_sync_fs()
6340 		target = jbd2_get_latest_transaction(sbi->s_journal);  in ext4_sync_fs()
6341 		if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&  in ext4_sync_fs()
6342 		    !jbd2_trans_will_send_data_barrier(sbi->s_journal, target))  in ext4_sync_fs()
6345 		if (jbd2_journal_start_commit(sbi->s_journal, &target)) {  in ext4_sync_fs()
6347 				ret = jbd2_log_wait_commit(sbi->s_journal,  in ext4_sync_fs()
6354 		err = blkdev_issue_flush(sb->s_bdev);  in ext4_sync_fs()
6363  * LVM calls this function before a (read-only) snapshot is created.  This
6373 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_freeze()
6410 	if (EXT4_SB(sb)->s_journal) {  in ext4_unfreeze()
6439 	struct ext4_fs_context *ctx = fc->fs_private;  in __ext4_remount()
6440 	struct ext4_super_block *es;  in __ext4_remount()  local
6455 	old_sb_flags = sb->s_flags;  in __ext4_remount()
6456 	old_opts.s_mount_opt = sbi->s_mount_opt;  in __ext4_remount()
6457 	old_opts.s_mount_opt2 = sbi->s_mount_opt2;  in __ext4_remount()
6458 	old_opts.s_resuid = sbi->s_resuid;  in __ext4_remount()
6459 	old_opts.s_resgid = sbi->s_resgid;  in __ext4_remount()
6460 	old_opts.s_commit_interval = sbi->s_commit_interval;  in __ext4_remount()
6461 	old_opts.s_min_batch_time = sbi->s_min_batch_time;  in __ext4_remount()
6462 	old_opts.s_max_batch_time = sbi->s_max_batch_time;  in __ext4_remount()
6464 	old_opts.s_jquota_fmt = sbi->s_jquota_fmt;  in __ext4_remount()
6466 		if (sbi->s_qf_names[i]) {  in __ext4_remount()
6473 				return -ENOMEM;  in __ext4_remount()
6478 	if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) {  in __ext4_remount()
6479 		if (sbi->s_journal && sbi->s_journal->j_task->io_context)  in __ext4_remount()
6480 			ctx->journal_ioprio =  in __ext4_remount()
6481 				sbi->s_journal->j_task->io_context->ioprio;  in __ext4_remount()
6483 			ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;  in __ext4_remount()
6502 		sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM;  in __ext4_remount()
6509 			err = -EINVAL;  in __ext4_remount()
6515 			err = -EINVAL;  in __ext4_remount()
6522 			err = -EINVAL;  in __ext4_remount()
6527 	if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) {  in __ext4_remount()
6528 		ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount");  in __ext4_remount()
6529 		err = -EINVAL;  in __ext4_remount()
6536 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in __ext4_remount()
6539 	es = sbi->s_es;  in __ext4_remount()
6541 	if (sbi->s_journal) {  in __ext4_remount()
6542 		ext4_init_journal_params(sb, sbi->s_journal);  in __ext4_remount()
6543 		set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);  in __ext4_remount()
6547 	flush_work(&sbi->s_sb_upd_work);  in __ext4_remount()
6549 	if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {  in __ext4_remount()
6551 			err = -EROFS;  in __ext4_remount()
6555 		if (fc->sb_flags & SB_RDONLY) {  in __ext4_remount()
6559 			err = dquot_suspend(sb, -1);  in __ext4_remount()
6567 			sb->s_flags |= SB_RDONLY;  in __ext4_remount()
6574 			if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) &&  in __ext4_remount()
6575 			    (sbi->s_mount_state & EXT4_VALID_FS))  in __ext4_remount()
6576 				es->s_state = cpu_to_le16(sbi->s_mount_state);  in __ext4_remount()
6578 			if (sbi->s_journal) {  in __ext4_remount()
6580 				 * We let remount-ro finish even if marking fs  in __ext4_remount()
6583 				ext4_mark_recovery_complete(sb, es);  in __ext4_remount()
6589 				err = -EROFS;  in __ext4_remount()
6596 			for (g = 0; g < sbi->s_groups_count; g++) {  in __ext4_remount()
6604 					       le16_to_cpu(gdp->bg_checksum));  in __ext4_remount()
6605 					err = -EFSBADCRC;  in __ext4_remount()
6615 			if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) {  in __ext4_remount()
6620 				err = -EINVAL;  in __ext4_remount()
6625 			 * Mounting a RDONLY partition read-write, so reread  in __ext4_remount()
6630 			if (sbi->s_journal) {  in __ext4_remount()
6631 				err = ext4_clear_journal_err(sb, es);  in __ext4_remount()
6635 			sbi->s_mount_state = (le16_to_cpu(es->s_state) &  in __ext4_remount()
6638 			err = ext4_setup_super(sb, es, 0);  in __ext4_remount()
6642 			sb->s_flags &= ~SB_RDONLY;  in __ext4_remount()
6645 						le64_to_cpu(es->s_mmp_block));  in __ext4_remount()
6660 	if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) {  in __ext4_remount()
6666 	if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) {  in __ext4_remount()
6675 			dquot_resume(sb, -1);  in __ext4_remount()
6686 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)  in __ext4_remount()
6709 	 * re-enable quota  in __ext4_remount()
6713 		dquot_resume(sb, -1);  in __ext4_remount()
6716 	sb->s_flags = old_sb_flags;  in __ext4_remount()
6717 	sbi->s_mount_opt = old_opts.s_mount_opt;  in __ext4_remount()
6718 	sbi->s_mount_opt2 = old_opts.s_mount_opt2;  in __ext4_remount()
6719 	sbi->s_resuid = old_opts.s_resuid;  in __ext4_remount()
6720 	sbi->s_resgid = old_opts.s_resgid;  in __ext4_remount()
6721 	sbi->s_commit_interval = old_opts.s_commit_interval;  in __ext4_remount()
6722 	sbi->s_min_batch_time = old_opts.s_min_batch_time;  in __ext4_remount()
6723 	sbi->s_max_batch_time = old_opts.s_max_batch_time;  in __ext4_remount()
6726 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)  in __ext4_remount()
6729 	sbi->s_jquota_fmt = old_opts.s_jquota_fmt;  in __ext4_remount()
6732 		rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]);  in __ext4_remount()
6745 	struct super_block *sb = fc->root->d_sb;  in ext4_reconfigure()
6748 	fc->s_fs_info = EXT4_SB(sb);  in ext4_reconfigure()
6758 	ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.",  in ext4_reconfigure()
6759 		 &sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w",  in ext4_reconfigure()
6778 	spin_lock(&dquot->dq_dqb_lock);  in ext4_statfs_project()
6780 	limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,  in ext4_statfs_project()
6781 			     dquot->dq_dqb.dqb_bhardlimit);  in ext4_statfs_project()
6782 	limit >>= sb->s_blocksize_bits;  in ext4_statfs_project()
6784 	if (limit && buf->f_blocks > limit) {  in ext4_statfs_project()
6785 		curblock = (dquot->dq_dqb.dqb_curspace +  in ext4_statfs_project()
6786 			    dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;  in ext4_statfs_project()
6787 		buf->f_blocks = limit;  in ext4_statfs_project()
6788 		buf->f_bfree = buf->f_bavail =  in ext4_statfs_project()
6789 			(buf->f_blocks > curblock) ?  in ext4_statfs_project()
6790 			 (buf->f_blocks - curblock) : 0;  in ext4_statfs_project()
6793 	limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,  in ext4_statfs_project()
6794 			     dquot->dq_dqb.dqb_ihardlimit);  in ext4_statfs_project()
6795 	if (limit && buf->f_files > limit) {  in ext4_statfs_project()
6796 		buf->f_files = limit;  in ext4_statfs_project()
6797 		buf->f_ffree =  in ext4_statfs_project()
6798 			(buf->f_files > dquot->dq_dqb.dqb_curinodes) ?  in ext4_statfs_project()
6799 			 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;  in ext4_statfs_project()
6802 	spin_unlock(&dquot->dq_dqb_lock);  in ext4_statfs_project()
6810 	struct super_block *sb = dentry->d_sb;  in ext4_statfs()
6812 	struct ext4_super_block *es = sbi->s_es;  in ext4_statfs()  local
6815 	resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters));  in ext4_statfs()
6818 		overhead = sbi->s_overhead;  in ext4_statfs()
6820 	buf->f_type = EXT4_SUPER_MAGIC;  in ext4_statfs()
6821 	buf->f_bsize = sb->s_blocksize;  in ext4_statfs()
6822 	buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead);  in ext4_statfs()
6823 	bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) -  in ext4_statfs()
6824 		percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter);  in ext4_statfs()
6826 	buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0));  in ext4_statfs()
6827 	buf->f_bavail = buf->f_bfree -  in ext4_statfs()
6828 			(ext4_r_blocks_count(es) + resv_blocks);  in ext4_statfs()
6829 	if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks))  in ext4_statfs()
6830 		buf->f_bavail = 0;  in ext4_statfs()
6831 	buf->f_files = le32_to_cpu(es->s_inodes_count);  in ext4_statfs()
6832 	buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);  in ext4_statfs()
6833 	buf->f_namelen = EXT4_NAME_LEN;  in ext4_statfs()
6834 	buf->f_fsid = uuid_to_fsid(es->s_uuid);  in ext4_statfs()
6837 	if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) &&  in ext4_statfs()
6839 		ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf);  in ext4_statfs()
6853 	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type];  in dquot_to_inode()
6864 				    EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb));  in ext4_write_dquot()
6880 				    EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb));  in ext4_acquire_dquot()
6896 				    EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb));  in ext4_release_dquot()
6911 	struct super_block *sb = dquot->dq_sb;  in ext4_mark_dquot_dirty()
6942 	 * *exactly* the same as the argument to init_rwsem() --- in  in lockdep_set_quota_inode()
6943 	 * this case, in init_once() --- or lockdep gets unhappy  in lockdep_set_quota_inode()
6948 	lockdep_set_subclass(&ei->i_data_sem, subclass);  in lockdep_set_quota_inode()
6960 		return -EINVAL;  in ext4_quota_on()
6963 	if (path->dentry->d_sb != sb)  in ext4_quota_on()
6964 		return -EXDEV;  in ext4_quota_on()
6967 	if (IS_NOQUOTA(d_inode(path->dentry)))  in ext4_quota_on()
6968 		return -EBUSY;  in ext4_quota_on()
6971 	if (EXT4_SB(sb)->s_qf_names[type]) {  in ext4_quota_on()
6973 		if (path->dentry->d_parent != sb->s_root)  in ext4_quota_on()
6977 		sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY;  in ext4_quota_on()
6983 		sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY;  in ext4_quota_on()
6986 	lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);  in ext4_quota_on()
6989 		struct inode *inode = d_inode(path->dentry);  in ext4_quota_on()
7001 		EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL;  in ext4_quota_on()
7012 		lockdep_set_quota_inode(path->dentry->d_inode,  in ext4_quota_on()
7037 		le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),  in ext4_quota_enable()
7038 		le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),  in ext4_quota_enable()
7039 		le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)  in ext4_quota_enable()
7045 		return -EPERM;  in ext4_quota_enable()
7050 		return -EUCLEAN;  in ext4_quota_enable()
7061 	qf_inode->i_flags |= S_NOQUOTA;  in ext4_quota_enable()
7071 /* Enable usage tracking for all quota types. */
7076 		le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),  in ext4_enable_quotas()
7077 		le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),  in ext4_enable_quotas()
7078 		le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)  in ext4_enable_quotas()
7086 	sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY;  in ext4_enable_quotas()
7094 					"Failed to enable quota tracking "  in ext4_enable_quotas()
7109 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_off()
7125 	 * When the filesystem was remounted read-only first, we cannot cleanup  in ext4_quota_off()
7143 	EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL);  in ext4_quota_off()
7145 	inode->i_mtime = inode_set_ctime_current(inode);  in ext4_quota_off()
7158 /* Read data from quotafile - avoid pagecache and such because we cannot afford
7165 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_read()
7167 	int offset = off & (sb->s_blocksize - 1);  in ext4_quota_read()
7176 		len = i_size-off;  in ext4_quota_read()
7179 		tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);  in ext4_quota_read()
7186 			memcpy(data, bh->b_data+offset, tocopy);  in ext4_quota_read()
7189 		toread -= tocopy;  in ext4_quota_read()
7201 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_write()
7203 	int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1);  in ext4_quota_write()
7212 		return -EIO;  in ext4_quota_write()
7218 	if (sb->s_blocksize - offset < len) {  in ext4_quota_write()
7222 		return -EIO;  in ext4_quota_write()
7229 	} while (PTR_ERR(bh) == -ENOSPC &&  in ext4_quota_write()
7230 		 ext4_should_retry_alloc(inode->i_sb, &retries));  in ext4_quota_write()
7242 	memcpy(bh->b_data+offset, data, len);  in ext4_quota_write()
7243 	flush_dcache_page(bh->b_page);  in ext4_quota_write()
7248 	if (inode->i_size < off + len) {  in ext4_quota_write()
7250 		EXT4_I(inode)->i_disksize = inode->i_size;  in ext4_quota_write()
7265 		       "EXT4-fs: Unable to register as ext2 (%d)\n", err);  in register_as_ext2()
7294 		       "EXT4-fs: Unable to register as ext3 (%d)\n", err);  in register_as_ext3()
7318 	struct block_device *journal_bdev = sbi ? sbi->s_journal_bdev : NULL;  in ext4_kill_sb()
7346 	/* Build-time check for flags consistency */  in ext4_init_fs()