1 // SPDX-License-Identifier: GPL-2.0
7  * Laboratoire MASI - Institut Blaise Pascal
16  *  Big-endian to little-endian byte-swapping/bitmaps by
28 #include <linux/backing-dev.h>
73 					struct ext4_super_block *es);
75 				  struct ext4_super_block *es);
103  * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start
104  *   -> page lock -> i_data_sem (rw)
107  * sb_start_write -> i_mutex -> mmap_lock
108  * sb_start_write -> i_mutex -> transaction start -> page lock ->
112  * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) ->
114  * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start ->
118  * sb_start_write -> i_mutex -> mmap_lock
119  * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw)
122  * transaction start -> page lock(s) -> i_data_sem (rw)
144 #define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type)
160 #define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type)
179 	bh->b_end_io = end_io ? end_io : end_buffer_read_sync;  in __ext4_read_bh()
211 	return -EIO;  in ext4_read_bh()
239 		return ERR_PTR(-ENOMEM);  in __ext4_sb_bread_gfp()
275 				 struct ext4_super_block *es)  in ext4_verify_csum_type()  argument
280 	return es->s_checksum_type == EXT4_CRC32C_CHKSUM;  in ext4_verify_csum_type()
284 			    struct ext4_super_block *es)  in ext4_superblock_csum()  argument
290 	csum = ext4_chksum(sbi, ~0, (char *)es, offset);  in ext4_superblock_csum()
296 				       struct ext4_super_block *es)  in ext4_superblock_csum_verify()  argument
301 	return es->s_checksum == ext4_superblock_csum(sb, es);  in ext4_superblock_csum_verify()
306 	struct ext4_super_block *es = EXT4_SB(sb)->s_es;  in ext4_superblock_csum_set()  local
311 	es->s_checksum = ext4_superblock_csum(sb, es);  in ext4_superblock_csum_set()
317 	return le32_to_cpu(bg->bg_block_bitmap_lo) |  in ext4_block_bitmap()
319 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);  in ext4_block_bitmap()
325 	return le32_to_cpu(bg->bg_inode_bitmap_lo) |  in ext4_inode_bitmap()
327 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);  in ext4_inode_bitmap()
333 	return le32_to_cpu(bg->bg_inode_table_lo) |  in ext4_inode_table()
335 		 (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);  in ext4_inode_table()
341 	return le16_to_cpu(bg->bg_free_blocks_count_lo) |  in ext4_free_group_clusters()
343 		 (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0);  in ext4_free_group_clusters()
349 	return le16_to_cpu(READ_ONCE(bg->bg_free_inodes_count_lo)) |  in ext4_free_inodes_count()
351 		 (__u32)le16_to_cpu(READ_ONCE(bg->bg_free_inodes_count_hi)) << 16 : 0);  in ext4_free_inodes_count()
357 	return le16_to_cpu(bg->bg_used_dirs_count_lo) |  in ext4_used_dirs_count()
359 		 (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0);  in ext4_used_dirs_count()
365 	return le16_to_cpu(bg->bg_itable_unused_lo) |  in ext4_itable_unused_count()
367 		 (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0);  in ext4_itable_unused_count()
373 	bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk);  in ext4_block_bitmap_set()
375 		bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);  in ext4_block_bitmap_set()
381 	bg->bg_inode_bitmap_lo  = cpu_to_le32((u32)blk);  in ext4_inode_bitmap_set()
383 		bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32);  in ext4_inode_bitmap_set()
389 	bg->bg_inode_table_lo = cpu_to_le32((u32)blk);  in ext4_inode_table_set()
391 		bg->bg_inode_table_hi = cpu_to_le32(blk >> 32);  in ext4_inode_table_set()
397 	bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count);  in ext4_free_group_clusters_set()
399 		bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16);  in ext4_free_group_clusters_set()
405 	WRITE_ONCE(bg->bg_free_inodes_count_lo, cpu_to_le16((__u16)count));  in ext4_free_inodes_set()
407 		WRITE_ONCE(bg->bg_free_inodes_count_hi, cpu_to_le16(count >> 16));  in ext4_free_inodes_set()
413 	bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count);  in ext4_used_dirs_set()
415 		bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16);  in ext4_used_dirs_set()
421 	bg->bg_itable_unused_lo = cpu_to_le16((__u16)count);  in ext4_itable_unused_set()
423 		bg->bg_itable_unused_hi = cpu_to_le16(count >> 16);  in ext4_itable_unused_set()
428 	now = clamp_val(now, 0, (1ull << 40) - 1);  in __ext4_update_tstamp()
438 #define ext4_update_tstamp(es, tstamp) \  argument
439 	__ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \
441 #define ext4_get_tstamp(es, tstamp) \  argument
442 	__ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi)
451  * This function is designed to update the on-disk superblock only under
462 	struct ext4_super_block *es = sbi->s_es;  in ext4_maybe_update_superblock()  local
463 	journal_t *journal = sbi->s_journal;  in ext4_maybe_update_superblock()
469 	if (sb_rdonly(sb) || !(sb->s_flags & SB_ACTIVE) ||  in ext4_maybe_update_superblock()
470 	    !journal || (journal->j_flags & JBD2_UNMOUNT))  in ext4_maybe_update_superblock()
474 	last_update = ext4_get_tstamp(es, s_wtime);  in ext4_maybe_update_superblock()
476 	if (likely(now - last_update < EXT4_SB_REFRESH_INTERVAL_SEC))  in ext4_maybe_update_superblock()
479 	lifetime_write_kbytes = sbi->s_kbytes_written +  in ext4_maybe_update_superblock()
480 		((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -  in ext4_maybe_update_superblock()
481 		  sbi->s_sectors_written_start) >> 1);  in ext4_maybe_update_superblock()
489 	diff_size = lifetime_write_kbytes - le64_to_cpu(es->s_kbytes_written);  in ext4_maybe_update_superblock()
492 		schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in ext4_maybe_update_superblock()
496  * The del_gendisk() function uninitializes the disk-specific data
505 	struct inode *bd_inode = sb->s_bdev->bd_inode;  in block_device_ejected()
508 	return bdi->dev == NULL;  in block_device_ejected()
513 	struct super_block		*sb = journal->j_private;  in ext4_journal_commit_callback()
518 	BUG_ON(txn->t_state == T_FINISHED);  in ext4_journal_commit_callback()
520 	ext4_process_freed_data(sb, txn->t_tid);  in ext4_journal_commit_callback()
523 	spin_lock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
524 	while (!list_empty(&txn->t_private_list)) {  in ext4_journal_commit_callback()
525 		jce = list_entry(txn->t_private_list.next,  in ext4_journal_commit_callback()
527 		list_del_init(&jce->jce_list);  in ext4_journal_commit_callback()
528 		spin_unlock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
529 		jce->jce_func(sb, jce, error);  in ext4_journal_commit_callback()
530 		spin_lock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
532 	spin_unlock(&sbi->s_md_lock);  in ext4_journal_commit_callback()
570 		    (jh && (jh->b_transaction != transaction ||  in ext4_journalled_writepage_callback()
571 			    jh->b_next_transaction))) {  in ext4_journalled_writepage_callback()
575 	} while ((bh = bh->b_this_page) != head);  in ext4_journalled_writepage_callback()
583 	struct address_space *mapping = jinode->i_vfs_inode->i_mapping;  in ext4_journalled_submit_inode_data_buffers()
587 		.range_start = jinode->i_dirty_start,  in ext4_journalled_submit_inode_data_buffers()
588 		.range_end = jinode->i_dirty_end,  in ext4_journalled_submit_inode_data_buffers()
593 				 jinode->i_transaction);  in ext4_journalled_submit_inode_data_buffers()
600 	if (ext4_should_journal_data(jinode->i_vfs_inode))  in ext4_journal_submit_inode_data_buffers()
611 	if (!ext4_should_journal_data(jinode->i_vfs_inode))  in ext4_journal_finish_inode_data_buffers()
669 	spin_lock(&sbi->s_error_lock);  in save_error_info()
670 	sbi->s_add_error_count++;  in save_error_info()
671 	sbi->s_last_error_code = error;  in save_error_info()
672 	sbi->s_last_error_line = line;  in save_error_info()
673 	sbi->s_last_error_ino = ino;  in save_error_info()
674 	sbi->s_last_error_block = block;  in save_error_info()
675 	sbi->s_last_error_func = func;  in save_error_info()
676 	sbi->s_last_error_time = ktime_get_real_seconds();  in save_error_info()
677 	if (!sbi->s_first_error_time) {  in save_error_info()
678 		sbi->s_first_error_code = error;  in save_error_info()
679 		sbi->s_first_error_line = line;  in save_error_info()
680 		sbi->s_first_error_ino = ino;  in save_error_info()
681 		sbi->s_first_error_block = block;  in save_error_info()
682 		sbi->s_first_error_func = func;  in save_error_info()
683 		sbi->s_first_error_time = sbi->s_last_error_time;  in save_error_info()
685 	spin_unlock(&sbi->s_error_lock);  in save_error_info()
712 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_handle_error()
715 	EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in ext4_handle_error()
720 		set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags);  in ext4_handle_error()
722 			jbd2_journal_abort(journal, -EIO);  in ext4_handle_error()
725 	if (!bdev_read_only(sb->s_bdev)) {  in ext4_handle_error()
734 			schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in ext4_handle_error()
741 	 * could panic during 'reboot -f' as the underlying device got already  in ext4_handle_error()
745 		panic("EXT4-fs (device %s): panic forced after error\n",  in ext4_handle_error()
746 			sb->s_id);  in ext4_handle_error()
752 	ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");  in ext4_handle_error()
756 	 * sb->s_umount semaphore and setting it without proper remount  in ext4_handle_error()
766 	journal_t *journal = sbi->s_journal;  in update_super_work()
777 	if (!sb_rdonly(sbi->s_sb) && journal) {  in update_super_work()
778 		struct buffer_head *sbh = sbi->s_sbh;  in update_super_work()
789 		if (sbi->s_add_error_count > 0)  in update_super_work()
792 		ext4_update_super(sbi->s_sb);  in update_super_work()
794 			ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "  in update_super_work()
816 	ext4_commit_super(sbi->s_sb);  in update_super_work()
821 		___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state),	\
822 			     "EXT4-fs error")
840 		       "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",  in __ext4_error()
841 		       sb->s_id, function, line, current->comm, &vaf);  in __ext4_error()
856 	if (unlikely(ext4_forced_shutdown(inode->i_sb)))  in __ext4_error_inode()
859 	trace_ext4_error(inode->i_sb, function, line);  in __ext4_error_inode()
860 	if (ext4_error_ratelimit(inode->i_sb)) {  in __ext4_error_inode()
865 			printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "  in __ext4_error_inode()
867 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_inode()
868 			       block, current->comm, &vaf);  in __ext4_error_inode()
870 			printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "  in __ext4_error_inode()
872 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_inode()
873 			       current->comm, &vaf);  in __ext4_error_inode()
876 	fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED);  in __ext4_error_inode()
878 	ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block,  in __ext4_error_inode()
891 	if (unlikely(ext4_forced_shutdown(inode->i_sb)))  in __ext4_error_file()
894 	trace_ext4_error(inode->i_sb, function, line);  in __ext4_error_file()
895 	if (ext4_error_ratelimit(inode->i_sb)) {  in __ext4_error_file()
904 			       "EXT4-fs error (device %s): %s:%d: inode #%lu: "  in __ext4_error_file()
906 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_file()
907 			       block, current->comm, path, &vaf);  in __ext4_error_file()
910 			       "EXT4-fs error (device %s): %s:%d: inode #%lu: "  in __ext4_error_file()
912 			       inode->i_sb->s_id, function, line, inode->i_ino,  in __ext4_error_file()
913 			       current->comm, path, &vaf);  in __ext4_error_file()
916 	fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED);  in __ext4_error_file()
918 	ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block,  in __ext4_error_file()
928 	case -EFSCORRUPTED:  in ext4_decode_error()
931 	case -EFSBADCRC:  in ext4_decode_error()
934 	case -EIO:  in ext4_decode_error()
937 	case -ENOMEM:  in ext4_decode_error()
940 	case -EROFS:  in ext4_decode_error()
941 		if (!sb || (EXT4_SB(sb)->s_journal &&  in ext4_decode_error()
942 			    EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT))  in ext4_decode_error()
953 			if (snprintf(nbuf, 16, "error %d", -errno) >= 0)  in ext4_decode_error()
977 	if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb))  in __ext4_std_error()
982 		printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n",  in __ext4_std_error()
983 		       sb->s_id, function, line, errstr);  in __ext4_std_error()
987 	ext4_handle_error(sb, false, -errno, 0, 0, function, line);  in __ext4_std_error()
997 		atomic_inc(&EXT4_SB(sb)->s_msg_count);  in __ext4_msg()
998 		if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state),  in __ext4_msg()
999 				  "EXT4-fs"))  in __ext4_msg()
1007 		printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);  in __ext4_msg()
1009 		printk("%sEXT4-fs: %pV\n", prefix, &vaf);  in __ext4_msg()
1015 	atomic_inc(&EXT4_SB(sb)->s_warning_count);  in ext4_warning_ratelimit()
1016 	return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state),  in ext4_warning_ratelimit()
1017 			    "EXT4-fs warning");  in ext4_warning_ratelimit()
1032 	printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n",  in __ext4_warning()
1033 	       sb->s_id, function, line, &vaf);  in __ext4_warning()
1043 	if (!ext4_warning_ratelimit(inode->i_sb))  in __ext4_warning_inode()
1049 	printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: "  in __ext4_warning_inode()
1050 	       "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id,  in __ext4_warning_inode()
1051 	       function, line, inode->i_ino, current->comm, &vaf);  in __ext4_warning_inode()
1073 		printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ",  in __ext4_grp_locked_error()
1074 		       sb->s_id, function, line, grp);  in __ext4_grp_locked_error()
1087 		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in __ext4_grp_locked_error()
1088 		if (!bdev_read_only(sb->s_bdev)) {  in __ext4_grp_locked_error()
1091 			schedule_work(&EXT4_SB(sb)->s_sb_upd_work);  in __ext4_grp_locked_error()
1125 					    &grp->bb_state);  in ext4_mark_group_bitmap_corrupted()
1127 			percpu_counter_sub(&sbi->s_freeclusters_counter,  in ext4_mark_group_bitmap_corrupted()
1128 					   grp->bb_free);  in ext4_mark_group_bitmap_corrupted()
1133 					    &grp->bb_state);  in ext4_mark_group_bitmap_corrupted()
1138 			percpu_counter_sub(&sbi->s_freeinodes_counter,  in ext4_mark_group_bitmap_corrupted()
1146 	struct ext4_super_block *es = EXT4_SB(sb)->s_es;  in ext4_update_dynamic_rev()  local
1148 	if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV)  in ext4_update_dynamic_rev()
1156 	es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO);  in ext4_update_dynamic_rev()
1157 	es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE);  in ext4_update_dynamic_rev()
1158 	es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV);  in ext4_update_dynamic_rev()
1159 	/* leave es->s_feature_*compat flags alone */  in ext4_update_dynamic_rev()
1160 	/* es->s_uuid will be set by e2fsck if empty */  in ext4_update_dynamic_rev()
1171 	return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode;  in orphan_list_entry()
1179 		 le32_to_cpu(sbi->s_es->s_last_orphan));  in dump_orphan_list()
1182 	list_for_each(l, &sbi->s_orphan) {  in dump_orphan_list()
1186 		       inode->i_sb->s_id, inode->i_ino, inode,  in dump_orphan_list()
1187 		       inode->i_mode, inode->i_nlink,  in dump_orphan_list()
1200 	for (type--; type >= 0; type--)  in ext4_quotas_off()
1212 	return rcu_dereference_protected(sbi->s_qf_names[type],  in get_qf_name()
1213 					 lockdep_is_held(&sb->s_umount));  in get_qf_name()
1226 	block = ext4_count_free_clusters(sbi->s_sb);  in ext4_percpu_param_init()
1227 	ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block));  in ext4_percpu_param_init()
1228 	err = percpu_counter_init(&sbi->s_freeclusters_counter, block,  in ext4_percpu_param_init()
1231 		unsigned long freei = ext4_count_free_inodes(sbi->s_sb);  in ext4_percpu_param_init()
1232 		sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);  in ext4_percpu_param_init()
1233 		err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,  in ext4_percpu_param_init()
1237 		err = percpu_counter_init(&sbi->s_dirs_counter,  in ext4_percpu_param_init()
1238 					  ext4_count_dirs(sbi->s_sb), GFP_KERNEL);  in ext4_percpu_param_init()
1240 		err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,  in ext4_percpu_param_init()
1243 		err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0,  in ext4_percpu_param_init()
1246 		err = percpu_init_rwsem(&sbi->s_writepages_rwsem);  in ext4_percpu_param_init()
1249 		ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory");  in ext4_percpu_param_init()
1256 	percpu_counter_destroy(&sbi->s_freeclusters_counter);  in ext4_percpu_param_destroy()
1257 	percpu_counter_destroy(&sbi->s_freeinodes_counter);  in ext4_percpu_param_destroy()
1258 	percpu_counter_destroy(&sbi->s_dirs_counter);  in ext4_percpu_param_destroy()
1259 	percpu_counter_destroy(&sbi->s_dirtyclusters_counter);  in ext4_percpu_param_destroy()
1260 	percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);  in ext4_percpu_param_destroy()
1261 	percpu_free_rwsem(&sbi->s_writepages_rwsem);  in ext4_percpu_param_destroy()
1270 	group_desc = rcu_dereference(sbi->s_group_desc);  in ext4_group_desc_free()
1271 	for (i = 0; i < sbi->s_gdb_count; i++)  in ext4_group_desc_free()
1283 	flex_groups = rcu_dereference(sbi->s_flex_groups);  in ext4_flex_groups_free()
1285 		for (i = 0; i < sbi->s_flex_groups_allocated; i++)  in ext4_flex_groups_free()
1295 	struct ext4_super_block *es = sbi->s_es;  in ext4_put_super()  local
1302 	 * path which could have sbi->s_journal->j_task as NULL  in ext4_put_super()
1303 	 * Unregister sysfs before flush sbi->s_sb_upd_work.  in ext4_put_super()
1311 	if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount"))  in ext4_put_super()
1313 			 &sb->s_uuid);  in ext4_put_super()
1318 	flush_work(&sbi->s_sb_upd_work);  in ext4_put_super()
1319 	destroy_workqueue(sbi->rsv_conversion_wq);  in ext4_put_super()
1322 	if (sbi->s_journal) {  in ext4_put_super()
1323 		aborted = is_journal_aborted(sbi->s_journal);  in ext4_put_super()
1324 		err = jbd2_journal_destroy(sbi->s_journal);  in ext4_put_super()
1325 		sbi->s_journal = NULL;  in ext4_put_super()
1327 			ext4_abort(sb, -err, "Couldn't clean up the journal");  in ext4_put_super()
1332 	timer_shutdown_sync(&sbi->s_err_report);  in ext4_put_super()
1340 		es->s_state = cpu_to_le16(sbi->s_mount_state);  in ext4_put_super()
1353 	/* Debugging code just in case the in-memory inode orphan list  in ext4_put_super()
1354 	 * isn't empty.  The on-disk one can be non-empty if we've  in ext4_put_super()
1356 	 * in-memory list had better be clean by this point. */  in ext4_put_super()
1357 	if (!list_empty(&sbi->s_orphan))  in ext4_put_super()
1359 	ASSERT(list_empty(&sbi->s_orphan));  in ext4_put_super()
1361 	sync_blockdev(sb->s_bdev);  in ext4_put_super()
1362 	invalidate_bdev(sb->s_bdev);  in ext4_put_super()
1363 	if (sbi->s_journal_bdev) {  in ext4_put_super()
1366 		 * floating about in memory - the physical journal device may  in ext4_put_super()
1367 		 * hotswapped, and it breaks the `ro-after' testing code.  in ext4_put_super()
1369 		sync_blockdev(sbi->s_journal_bdev);  in ext4_put_super()
1370 		invalidate_bdev(sbi->s_journal_bdev);  in ext4_put_super()
1373 	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);  in ext4_put_super()
1374 	sbi->s_ea_inode_cache = NULL;  in ext4_put_super()
1376 	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);  in ext4_put_super()
1377 	sbi->s_ea_block_cache = NULL;  in ext4_put_super()
1381 	brelse(sbi->s_sbh);  in ext4_put_super()
1382 	sb->s_fs_info = NULL;  in ext4_put_super()
1387 	kobject_put(&sbi->s_kobj);  in ext4_put_super()
1388 	wait_for_completion(&sbi->s_kobj_unregister);  in ext4_put_super()
1389 	if (sbi->s_chksum_driver)  in ext4_put_super()
1390 		crypto_free_shash(sbi->s_chksum_driver);  in ext4_put_super()
1391 	kfree(sbi->s_blockgroup_lock);  in ext4_put_super()
1392 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_put_super()
1393 	fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);  in ext4_put_super()
1395 	utf8_unload(sb->s_encoding);  in ext4_put_super()
1413 	inode_set_iversion(&ei->vfs_inode, 1);  in ext4_alloc_inode()
1414 	ei->i_flags = 0;  in ext4_alloc_inode()
1415 	spin_lock_init(&ei->i_raw_lock);  in ext4_alloc_inode()
1416 	ei->i_prealloc_node = RB_ROOT;  in ext4_alloc_inode()
1417 	atomic_set(&ei->i_prealloc_active, 0);  in ext4_alloc_inode()
1418 	rwlock_init(&ei->i_prealloc_lock);  in ext4_alloc_inode()
1419 	ext4_es_init_tree(&ei->i_es_tree);  in ext4_alloc_inode()
1420 	rwlock_init(&ei->i_es_lock);  in ext4_alloc_inode()
1421 	INIT_LIST_HEAD(&ei->i_es_list);  in ext4_alloc_inode()
1422 	ei->i_es_all_nr = 0;  in ext4_alloc_inode()
1423 	ei->i_es_shk_nr = 0;  in ext4_alloc_inode()
1424 	ei->i_es_shrink_lblk = 0;  in ext4_alloc_inode()
1425 	ei->i_reserved_data_blocks = 0;  in ext4_alloc_inode()
1426 	spin_lock_init(&(ei->i_block_reservation_lock));  in ext4_alloc_inode()
1427 	ext4_init_pending_tree(&ei->i_pending_tree);  in ext4_alloc_inode()
1429 	ei->i_reserved_quota = 0;  in ext4_alloc_inode()
1430 	memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));  in ext4_alloc_inode()
1432 	ei->jinode = NULL;  in ext4_alloc_inode()
1433 	INIT_LIST_HEAD(&ei->i_rsv_conversion_list);  in ext4_alloc_inode()
1434 	spin_lock_init(&ei->i_completed_io_lock);  in ext4_alloc_inode()
1435 	ei->i_sync_tid = 0;  in ext4_alloc_inode()
1436 	ei->i_datasync_tid = 0;  in ext4_alloc_inode()
1437 	atomic_set(&ei->i_unwritten, 0);  in ext4_alloc_inode()
1438 	INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);  in ext4_alloc_inode()
1439 	ext4_fc_init_inode(&ei->vfs_inode);  in ext4_alloc_inode()
1440 	mutex_init(&ei->i_fc_lock);  in ext4_alloc_inode()
1441 	return &ei->vfs_inode;  in ext4_alloc_inode()
1458 	if (!list_empty(&(EXT4_I(inode)->i_fc_list))) {  in ext4_free_in_core_inode()
1460 			__func__, inode->i_ino);  in ext4_free_in_core_inode()
1467 	if (!list_empty(&(EXT4_I(inode)->i_orphan))) {  in ext4_destroy_inode()
1468 		ext4_msg(inode->i_sb, KERN_ERR,  in ext4_destroy_inode()
1470 			 inode->i_ino, EXT4_I(inode));  in ext4_destroy_inode()
1477 	if (EXT4_I(inode)->i_reserved_data_blocks)  in ext4_destroy_inode()
1478 		ext4_msg(inode->i_sb, KERN_ERR,  in ext4_destroy_inode()
1480 			 inode->i_ino, EXT4_I(inode),  in ext4_destroy_inode()
1481 			 EXT4_I(inode)->i_reserved_data_blocks);  in ext4_destroy_inode()
1493 	INIT_LIST_HEAD(&ei->i_orphan);  in init_once()
1494 	init_rwsem(&ei->xattr_sem);  in init_once()
1495 	init_rwsem(&ei->i_data_sem);  in init_once()
1496 	inode_init_once(&ei->vfs_inode);  in init_once()
1497 	ext4_fc_init_inode(&ei->vfs_inode);  in init_once()
1510 		return -ENOMEM;  in init_inodecache()
1532 	if (EXT4_I(inode)->jinode) {  in ext4_clear_inode()
1534 					       EXT4_I(inode)->jinode);  in ext4_clear_inode()
1535 		jbd2_free_inode(EXT4_I(inode)->jinode);  in ext4_clear_inode()
1536 		EXT4_I(inode)->jinode = NULL;  in ext4_clear_inode()
1554 	if (generation && inode->i_generation != generation) {  in ext4_nfs_get_inode()
1556 		return ERR_PTR(-ESTALE);  in ext4_nfs_get_inode()
1606 	return EXT4_I(inode)->i_dquot;  in ext4_get_dquots()
1696 	{"remount-ro",	EXT4_MOUNT_ERRORS_RO},
1941 ext4_sb_read_encoding(const struct ext4_super_block *es)  in ext4_sb_read_encoding()  argument
1943 	__u16 magic = le16_to_cpu(es->s_encoding);  in ext4_sb_read_encoding()
2007 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_fc_free()
2014 		kfree(ctx->s_qf_names[i]);  in ext4_fc_free()
2016 	fscrypt_free_dummy_policy(&ctx->dummy_enc_policy);  in ext4_fc_free()
2026 		return -ENOMEM;  in ext4_init_fs_context()
2028 	fc->fs_private = ctx;  in ext4_init_fs_context()
2029 	fc->ops = &ext4_context_ops;  in ext4_init_fs_context()
2041 	struct ext4_fs_context *ctx = fc->fs_private;  in note_qf_name()
2044 	if (param->size < 1) {  in note_qf_name()
2046 		return -EINVAL;  in note_qf_name()
2048 	if (strchr(param->string, '/')) {  in note_qf_name()
2051 		return -EINVAL;  in note_qf_name()
2053 	if (ctx->s_qf_names[qtype]) {  in note_qf_name()
2054 		if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) {  in note_qf_name()
2058 			return -EINVAL;  in note_qf_name()
2063 	qname = kmemdup_nul(param->string, param->size, GFP_KERNEL);  in note_qf_name()
2067 		return -ENOMEM;  in note_qf_name()
2069 	ctx->s_qf_names[qtype] = qname;  in note_qf_name()
2070 	ctx->qname_spec |= 1 << qtype;  in note_qf_name()
2071 	ctx->spec |= EXT4_SPEC_JQUOTA;  in note_qf_name()
2080 	struct ext4_fs_context *ctx = fc->fs_private;  in unnote_qf_name()
2082 	if (ctx->s_qf_names[qtype])  in unnote_qf_name()
2083 		kfree(ctx->s_qf_names[qtype]);  in unnote_qf_name()
2085 	ctx->s_qf_names[qtype] = NULL;  in unnote_qf_name()
2086 	ctx->qname_spec |= 1 << qtype;  in unnote_qf_name()
2087 	ctx->spec |= EXT4_SPEC_JQUOTA;  in unnote_qf_name()
2100 		return -EINVAL;  in ext4_parse_test_dummy_encryption()
2103 						  &ctx->dummy_enc_policy);  in ext4_parse_test_dummy_encryption()
2104 	if (err == -EINVAL) {  in ext4_parse_test_dummy_encryption()
2106 			 "Value of option \"%s\" is unrecognized", param->key);  in ext4_parse_test_dummy_encryption()
2107 	} else if (err == -EEXIST) {  in ext4_parse_test_dummy_encryption()
2110 		return -EINVAL;  in ext4_parse_test_dummy_encryption()
2119 	ctx->mask_s_##name |= flag;					\
2120 	ctx->vals_s_##name |= flag;					\
2127 	ctx->mask_s_##name |= flag;					\
2128 	ctx->vals_s_##name &= ~flag;					\
2135 	return (ctx->vals_s_##name & flag);				\
2148 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_parse_param()
2159 	is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;  in ext4_parse_param()
2161 	for (m = ext4_mount_opts; m->token != Opt_err; m++)  in ext4_parse_param()
2162 		if (token == m->token)  in ext4_parse_param()
2165 	ctx->opt_flags |= m->flags;  in ext4_parse_param()
2167 	if (m->flags & MOPT_EXPLICIT) {  in ext4_parse_param()
2168 		if (m->mount_opt & EXT4_MOUNT_DELALLOC) {  in ext4_parse_param()
2170 		} else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) {  in ext4_parse_param()
2174 			return -EINVAL;  in ext4_parse_param()
2177 	if (m->flags & MOPT_NOSUPPORT) {  in ext4_parse_param()
2179 			 param->key);  in ext4_parse_param()
2186 		if (!*param->string)  in ext4_parse_param()
2191 		if (!*param->string)  in ext4_parse_param()
2197 		if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ext4_parse_param()
2199 				 "Ignoring %s option on remount", param->key);  in ext4_parse_param()
2201 			ctx->s_sb_block = result.uint_32;  in ext4_parse_param()
2202 			ctx->spec |= EXT4_SPEC_s_sb_block;  in ext4_parse_param()
2207 			 param->key);  in ext4_parse_param()
2222 		ctx->s_jquota_fmt = result.uint_32;  in ext4_parse_param()
2223 		ctx->spec |= EXT4_SPEC_JQFMT;  in ext4_parse_param()
2229 		ctx->spec |= EXT4_SPEC_DATAJ;  in ext4_parse_param()
2239 			return -EINVAL;  in ext4_parse_param()
2241 		ctx->s_commit_interval = HZ * result.uint_32;  in ext4_parse_param()
2242 		ctx->spec |= EXT4_SPEC_s_commit_interval;  in ext4_parse_param()
2248 			return -EINVAL;  in ext4_parse_param()
2250 		ctx->s_want_extra_isize = result.uint_32;  in ext4_parse_param()
2251 		ctx->spec |= EXT4_SPEC_s_want_extra_isize;  in ext4_parse_param()
2254 		ctx->s_max_batch_time = result.uint_32;  in ext4_parse_param()
2255 		ctx->spec |= EXT4_SPEC_s_max_batch_time;  in ext4_parse_param()
2258 		ctx->s_min_batch_time = result.uint_32;  in ext4_parse_param()
2259 		ctx->spec |= EXT4_SPEC_s_min_batch_time;  in ext4_parse_param()
2266 				 "EXT4-fs: inode_readahead_blks must be "  in ext4_parse_param()
2268 			return -EINVAL;  in ext4_parse_param()
2270 		ctx->s_inode_readahead_blks = result.uint_32;  in ext4_parse_param()
2271 		ctx->spec |= EXT4_SPEC_s_inode_readahead_blks;  in ext4_parse_param()
2275 		ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;  in ext4_parse_param()
2276 		if (param->type == fs_value_is_string)  in ext4_parse_param()
2277 			ctx->s_li_wait_mult = result.uint_32;  in ext4_parse_param()
2278 		ctx->spec |= EXT4_SPEC_s_li_wait_mult;  in ext4_parse_param()
2281 		ctx->s_max_dir_size_kb = result.uint_32;  in ext4_parse_param()
2282 		ctx->spec |= EXT4_SPEC_s_max_dir_size_kb;  in ext4_parse_param()
2286 		ctx->s_fc_debug_max_replay = result.uint_32;  in ext4_parse_param()
2287 		ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay;  in ext4_parse_param()
2291 		ctx->s_stripe = result.uint_32;  in ext4_parse_param()
2292 		ctx->spec |= EXT4_SPEC_s_stripe;  in ext4_parse_param()
2299 			return -EINVAL;  in ext4_parse_param()
2301 		ctx->s_resuid = uid;  in ext4_parse_param()
2302 		ctx->spec |= EXT4_SPEC_s_resuid;  in ext4_parse_param()
2309 			return -EINVAL;  in ext4_parse_param()
2311 		ctx->s_resgid = gid;  in ext4_parse_param()
2312 		ctx->spec |= EXT4_SPEC_s_resgid;  in ext4_parse_param()
2318 			return -EINVAL;  in ext4_parse_param()
2320 		ctx->journal_devnum = result.uint_32;  in ext4_parse_param()
2321 		ctx->spec |= EXT4_SPEC_JOURNAL_DEV;  in ext4_parse_param()
2332 			return -EINVAL;  in ext4_parse_param()
2339 			return -EINVAL;  in ext4_parse_param()
2343 		ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev);  in ext4_parse_param()
2344 		ctx->spec |= EXT4_SPEC_JOURNAL_DEV;  in ext4_parse_param()
2351 				 " (must be 0-7)");  in ext4_parse_param()
2352 			return -EINVAL;  in ext4_parse_param()
2354 		ctx->journal_ioprio =  in ext4_parse_param()
2356 		ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO;  in ext4_parse_param()
2388 		return -EINVAL;  in ext4_parse_param()
2392 			ctx_set_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2394 			ctx_clear_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2399 			ctx->spec |= EXT4_SPEC_mb_optimize_scan;  in ext4_parse_param()
2402 			ctx->spec |= EXT4_SPEC_mb_optimize_scan;  in ext4_parse_param()
2406 			return -EINVAL;  in ext4_parse_param()
2415 	if (m->token == Opt_err) {  in ext4_parse_param()
2417 			 param->key);  in ext4_parse_param()
2419 		return -EINVAL;  in ext4_parse_param()
2425 		if ((param->type == fs_value_is_flag) ||  in ext4_parse_param()
2429 		if (m->flags & MOPT_CLEAR)  in ext4_parse_param()
2431 		else if (unlikely(!(m->flags & MOPT_SET))) {  in ext4_parse_param()
2434 				 param->key);  in ext4_parse_param()
2436 			return -EINVAL;  in ext4_parse_param()
2438 		if (m->flags & MOPT_2) {  in ext4_parse_param()
2440 				ctx_set_mount_opt2(ctx, m->mount_opt);  in ext4_parse_param()
2442 				ctx_clear_mount_opt2(ctx, m->mount_opt);  in ext4_parse_param()
2445 				ctx_set_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2447 				ctx_clear_mount_opt(ctx, m->mount_opt);  in ext4_parse_param()
2480 					return -ENOMEM;  in parse_options()
2509 	int ret = -ENOMEM;  in parse_apply_sb_mount_options()
2511 	if (!sbi->s_es->s_mount_opts[0])  in parse_apply_sb_mount_options()
2514 	s_mount_opts = kstrndup(sbi->s_es->s_mount_opts,  in parse_apply_sb_mount_options()
2515 				sizeof(sbi->s_es->s_mount_opts),  in parse_apply_sb_mount_options()
2528 	fc->fs_private = s_ctx;  in parse_apply_sb_mount_options()
2529 	fc->s_fs_info = sbi;  in parse_apply_sb_mount_options()
2545 	if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV)  in parse_apply_sb_mount_options()
2546 		m_ctx->journal_devnum = s_ctx->journal_devnum;  in parse_apply_sb_mount_options()
2547 	if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)  in parse_apply_sb_mount_options()
2548 		m_ctx->journal_ioprio = s_ctx->journal_ioprio;  in parse_apply_sb_mount_options()
2567 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_apply_quota_options()
2575 	if (ctx->spec & EXT4_SPEC_JQUOTA) {  in ext4_apply_quota_options()
2577 			if (!(ctx->qname_spec & (1 << i)))  in ext4_apply_quota_options()
2580 			qname = ctx->s_qf_names[i]; /* May be NULL */  in ext4_apply_quota_options()
2583 			ctx->s_qf_names[i] = NULL;  in ext4_apply_quota_options()
2584 			qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,  in ext4_apply_quota_options()
2585 						lockdep_is_held(&sb->s_umount));  in ext4_apply_quota_options()
2591 	if (ctx->spec & EXT4_SPEC_JQFMT)  in ext4_apply_quota_options()
2592 		sbi->s_jquota_fmt = ctx->s_jquota_fmt;  in ext4_apply_quota_options()
2603 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_quota_consistency()
2618 			 "Cannot enable project quota enforcement.");  in ext4_check_quota_consistency()
2619 		return -EINVAL;  in ext4_check_quota_consistency()
2625 	    ctx->mask_s_mount_opt & quota_flags &&  in ext4_check_quota_consistency()
2629 	if (ctx->spec & EXT4_SPEC_JQUOTA) {  in ext4_check_quota_consistency()
2632 			if (!(ctx->qname_spec & (1 << i)))  in ext4_check_quota_consistency()
2636 			    !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i])  in ext4_check_quota_consistency()
2639 			if (sbi->s_qf_names[i] && ctx->s_qf_names[i] &&  in ext4_check_quota_consistency()
2641 				   ctx->s_qf_names[i]) != 0)  in ext4_check_quota_consistency()
2653 	if (ctx->spec & EXT4_SPEC_JQFMT) {  in ext4_check_quota_consistency()
2654 		if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded)  in ext4_check_quota_consistency()
2665 		       ctx->s_qf_names[USRQUOTA]);  in ext4_check_quota_consistency()
2667 		       ctx->s_qf_names[GRPQUOTA]);  in ext4_check_quota_consistency()
2688 			return -EINVAL;  in ext4_check_quota_consistency()
2691 		if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) {  in ext4_check_quota_consistency()
2694 			return -EINVAL;  in ext4_check_quota_consistency()
2703 	return -EINVAL;  in ext4_check_quota_consistency()
2707 	return -EINVAL;  in ext4_check_quota_consistency()
2711 	return -EINVAL;  in ext4_check_quota_consistency()
2720 	const struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_test_dummy_encryption()
2723 	if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2729 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2737 	if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ext4_check_test_dummy_encryption()
2738 		if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,  in ext4_check_test_dummy_encryption()
2739 						 &ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2743 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2746 	if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) {  in ext4_check_test_dummy_encryption()
2747 		if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,  in ext4_check_test_dummy_encryption()
2748 						 &ctx->dummy_enc_policy))  in ext4_check_test_dummy_encryption()
2752 		return -EINVAL;  in ext4_check_test_dummy_encryption()
2760 	if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) ||  in ext4_apply_test_dummy_encryption()
2762 	    fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy))  in ext4_apply_test_dummy_encryption()
2764 	EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy;  in ext4_apply_test_dummy_encryption()
2765 	memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy));  in ext4_apply_test_dummy_encryption()
2772 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_check_opt_consistency()
2773 	struct ext4_sb_info *sbi = fc->s_fs_info;  in ext4_check_opt_consistency()
2774 	int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;  in ext4_check_opt_consistency()
2777 	if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) {  in ext4_check_opt_consistency()
2780 		return -EINVAL;  in ext4_check_opt_consistency()
2782 	if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) {  in ext4_check_opt_consistency()
2785 		return -EINVAL;  in ext4_check_opt_consistency()
2788 	if (ctx->s_want_extra_isize >  in ext4_check_opt_consistency()
2789 	    (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) {  in ext4_check_opt_consistency()
2792 			 ctx->s_want_extra_isize);  in ext4_check_opt_consistency()
2793 		return -EINVAL;  in ext4_check_opt_consistency()
2798 			BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);  in ext4_check_opt_consistency()
2809 	if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) {  in ext4_check_opt_consistency()
2810 		if (!sbi->s_journal) {  in ext4_check_opt_consistency()
2819 			return -EINVAL;  in ext4_check_opt_consistency()
2828 			return -EINVAL;  in ext4_check_opt_consistency()
2832 		    (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||  in ext4_check_opt_consistency()
2833 		     (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) {  in ext4_check_opt_consistency()
2837 			return -EINVAL;  in ext4_check_opt_consistency()
2839 			 (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||  in ext4_check_opt_consistency()
2840 			  (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) {  in ext4_check_opt_consistency()
2843 			   ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||  in ext4_check_opt_consistency()
2844 			    (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||  in ext4_check_opt_consistency()
2845 			    !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) {  in ext4_check_opt_consistency()
2855 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_apply_options()
2856 	struct ext4_sb_info *sbi = fc->s_fs_info;  in ext4_apply_options()
2858 	sbi->s_mount_opt &= ~ctx->mask_s_mount_opt;  in ext4_apply_options()
2859 	sbi->s_mount_opt |= ctx->vals_s_mount_opt;  in ext4_apply_options()
2860 	sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2;  in ext4_apply_options()
2861 	sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2;  in ext4_apply_options()
2862 	sb->s_flags &= ~ctx->mask_s_flags;  in ext4_apply_options()
2863 	sb->s_flags |= ctx->vals_s_flags;  in ext4_apply_options()
2865 #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; })  in ext4_apply_options()
2889 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_validate_options()
2892 	usr_qf_name = ctx->s_qf_names[USRQUOTA];  in ext4_validate_options()
2893 	grp_qf_name = ctx->s_qf_names[GRPQUOTA];  in ext4_validate_options()
2906 			return -EINVAL;  in ext4_validate_options()
2920 	if (sbi->s_jquota_fmt) {  in ext4_show_quota_options()
2923 		switch (sbi->s_jquota_fmt) {  in ext4_show_quota_options()
2938 	usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]);  in ext4_show_quota_options()
2939 	grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]);  in ext4_show_quota_options()
2952 	for (spec = ext4_param_specs; spec->name != NULL; spec++)  in token2str()
2953 		if (spec->opt == token && !spec->type)  in token2str()
2955 	return spec->name;  in token2str()
2960  *  - it's set to a non-default value OR
2961  *  - if the per-sb default is different from the global default
2967 	struct ext4_super_block *es = sbi->s_es;  in _ext4_show_options()  local
2975 	if (sbi->s_sb_block != 1)  in _ext4_show_options()
2976 		SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block);  in _ext4_show_options()
2978 	for (m = ext4_mount_opts; m->token != Opt_err; m++) {  in _ext4_show_options()
2979 		int want_set = m->flags & MOPT_SET;  in _ext4_show_options()
2980 		int opt_2 = m->flags & MOPT_2;  in _ext4_show_options()
2983 		if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) ||  in _ext4_show_options()
2984 		    m->flags & MOPT_SKIP)  in _ext4_show_options()
2988 			mount_opt = sbi->s_mount_opt2;  in _ext4_show_options()
2989 			def_mount_opt = sbi->s_def_mount_opt2;  in _ext4_show_options()
2991 			mount_opt = sbi->s_mount_opt;  in _ext4_show_options()
2992 			def_mount_opt = sbi->s_def_mount_opt;  in _ext4_show_options()
2995 		if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt)))  in _ext4_show_options()
2999 		     (mount_opt & m->mount_opt) != m->mount_opt) ||  in _ext4_show_options()
3000 		    (!want_set && (mount_opt & m->mount_opt)))  in _ext4_show_options()
3002 		SEQ_OPTS_PRINT("%s", token2str(m->token));  in _ext4_show_options()
3005 	if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) ||  in _ext4_show_options()
3006 	    le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID)  in _ext4_show_options()
3008 				from_kuid_munged(&init_user_ns, sbi->s_resuid));  in _ext4_show_options()
3009 	if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) ||  in _ext4_show_options()
3010 	    le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID)  in _ext4_show_options()
3012 				from_kgid_munged(&init_user_ns, sbi->s_resgid));  in _ext4_show_options()
3013 	def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors);  in _ext4_show_options()
3015 		SEQ_OPTS_PUTS("errors=remount-ro");  in _ext4_show_options()
3020 	if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ)  in _ext4_show_options()
3021 		SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ);  in _ext4_show_options()
3022 	if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME)  in _ext4_show_options()
3023 		SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time);  in _ext4_show_options()
3024 	if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME)  in _ext4_show_options()
3025 		SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time);  in _ext4_show_options()
3026 	if (nodefs || sbi->s_stripe)  in _ext4_show_options()
3027 		SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe);  in _ext4_show_options()
3029 			(sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {  in _ext4_show_options()
3038 	    sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS)  in _ext4_show_options()
3040 			       sbi->s_inode_readahead_blks);  in _ext4_show_options()
3043 		       (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT)))  in _ext4_show_options()
3044 		SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult);  in _ext4_show_options()
3045 	if (nodefs || sbi->s_max_dir_size_kb)  in _ext4_show_options()
3046 		SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);  in _ext4_show_options()
3052 	if (sb->s_flags & SB_INLINECRYPT)  in _ext4_show_options()
3066 	if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&  in _ext4_show_options()
3069 	} else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&  in _ext4_show_options()
3080 	return _ext4_show_options(seq, root->d_sb, 0);  in ext4_show_options()
3085 	struct super_block *sb = seq->private;  in ext4_seq_options_show()
3094 static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,  in ext4_setup_super()  argument
3100 	if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) {  in ext4_setup_super()
3102 			 "forcing read-only mode");  in ext4_setup_super()
3103 		err = -EROFS;  in ext4_setup_super()
3108 	if (!(sbi->s_mount_state & EXT4_VALID_FS))  in ext4_setup_super()
3111 	else if (sbi->s_mount_state & EXT4_ERROR_FS)  in ext4_setup_super()
3115 	else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 &&  in ext4_setup_super()
3116 		 le16_to_cpu(es->s_mnt_count) >=  in ext4_setup_super()
3117 		 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))  in ext4_setup_super()
3121 	else if (le32_to_cpu(es->s_checkinterval) &&  in ext4_setup_super()
3122 		 (ext4_get_tstamp(es, s_lastcheck) +  in ext4_setup_super()
3123 		  le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds()))  in ext4_setup_super()
3127 	if (!sbi->s_journal)  in ext4_setup_super()
3128 		es->s_state &= cpu_to_le16(~EXT4_VALID_FS);  in ext4_setup_super()
3129 	if (!(__s16) le16_to_cpu(es->s_max_mnt_count))  in ext4_setup_super()
3130 		es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT);  in ext4_setup_super()
3131 	le16_add_cpu(&es->s_mnt_count, 1);  in ext4_setup_super()
3132 	ext4_update_tstamp(es, s_mtime);  in ext4_setup_super()
3133 	if (sbi->s_journal) {  in ext4_setup_super()
3144 			sb->s_blocksize,  in ext4_setup_super()
3145 			sbi->s_groups_count,  in ext4_setup_super()
3148 			sbi->s_mount_opt, sbi->s_mount_opt2);  in ext4_setup_super()
3158 	if (!sbi->s_log_groups_per_flex)  in ext4_alloc_flex_bg_array()
3161 	size = ext4_flex_group(sbi, ngroup - 1) + 1;  in ext4_alloc_flex_bg_array()
3162 	if (size <= sbi->s_flex_groups_allocated)  in ext4_alloc_flex_bg_array()
3166 			      sizeof(*sbi->s_flex_groups)), GFP_KERNEL);  in ext4_alloc_flex_bg_array()
3170 		return -ENOMEM;  in ext4_alloc_flex_bg_array()
3172 	for (i = sbi->s_flex_groups_allocated; i < size; i++) {  in ext4_alloc_flex_bg_array()
3177 			for (j = sbi->s_flex_groups_allocated; j < i; j++)  in ext4_alloc_flex_bg_array()
3182 			return -ENOMEM;  in ext4_alloc_flex_bg_array()
3186 	old_groups = rcu_dereference(sbi->s_flex_groups);  in ext4_alloc_flex_bg_array()
3189 		       (sbi->s_flex_groups_allocated *  in ext4_alloc_flex_bg_array()
3192 	rcu_assign_pointer(sbi->s_flex_groups, new_groups);  in ext4_alloc_flex_bg_array()
3193 	sbi->s_flex_groups_allocated = size;  in ext4_alloc_flex_bg_array()
3207 	sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;  in ext4_fill_flex_info()
3208 	if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) {  in ext4_fill_flex_info()
3209 		sbi->s_log_groups_per_flex = 0;  in ext4_fill_flex_info()
3213 	err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);  in ext4_fill_flex_info()
3217 	for (i = 0; i < sbi->s_groups_count; i++) {  in ext4_fill_flex_info()
3222 		atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes);  in ext4_fill_flex_info()
3224 			     &fg->free_clusters);  in ext4_fill_flex_info()
3225 		atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs);  in ext4_fill_flex_info()
3241 	if (ext4_has_metadata_csum(sbi->s_sb)) {  in ext4_group_desc_csum()
3246 		csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group,  in ext4_group_desc_csum()
3252 		if (offset < sbi->s_desc_size)  in ext4_group_desc_csum()
3254 					     sbi->s_desc_size - offset);  in ext4_group_desc_csum()
3264 	crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));  in ext4_group_desc_csum()
3267 	offset += sizeof(gdp->bg_checksum); /* skip checksum */  in ext4_group_desc_csum()
3269 	if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size)  in ext4_group_desc_csum()
3271 			    sbi->s_desc_size - offset);  in ext4_group_desc_csum()
3281 	    (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp)))  in ext4_group_desc_csum_verify()
3292 	gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp);  in ext4_group_desc_csum_set()
3295 /* Called at mount-time, super-block is locked */
3301 	ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);  in ext4_check_descriptors()
3308 	ext4_group_t i, grp = sbi->s_groups_count;  in ext4_check_descriptors()
3315 	for (i = 0; i < sbi->s_groups_count; i++) {  in ext4_check_descriptors()
3318 		if (i == sbi->s_groups_count - 1 || flexbg_flag)  in ext4_check_descriptors()
3319 			last_block = ext4_blocks_count(sbi->s_es) - 1;  in ext4_check_descriptors()
3322 				(EXT4_BLOCKS_PER_GROUP(sb) - 1);  in ext4_check_descriptors()
3324 		if ((grp == sbi->s_groups_count) &&  in ext4_check_descriptors()
3325 		   !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_check_descriptors()
3389 		    inode_table + sbi->s_itb_per_group - 1 > last_block) {  in ext4_check_descriptors()
3400 				     gdp)), le16_to_cpu(gdp->bg_checksum));  in ext4_check_descriptors()
3417  * Resulting logical blkno at s_maxbytes must fit in our on-disk
3424  * covering maximum file size must fit into on-disk format containers as
3438 		upper_limit = (1LL << 32) - 1;  in ext4_max_size()
3441 		upper_limit >>= (blkbits - 9);  in ext4_max_size()
3446 	 * 32-bit extent-start container, ee_block. We lower the maxbytes  in ext4_max_size()
3450 	res = (1LL << 32) - 1;  in ext4_max_size()
3453 	/* Sanity check against vm- & vfs- imposed limits */  in ext4_max_size()
3461  * Maximal bitmap file size.  There is a direct, and {,double-,triple-}indirect
3462  * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks.
3469 	unsigned int ppb = 1 << (bits - 2);  in ext4_max_bitmap_size()
3473 	 * mapped file such that the file's total number of 512-byte sectors,  in ext4_max_bitmap_size()
3474 	 * including data and all indirect blocks, does not exceed (2^48 - 1).  in ext4_max_bitmap_size()
3477 	 * number of 512-byte sectors of the file.  in ext4_max_bitmap_size()
3482 		 * represents total file blocks in 2^32 512-byte sectors ==  in ext4_max_bitmap_size()
3485 		upper_limit = (1LL << 32) - 1;  in ext4_max_bitmap_size()
3488 		upper_limit >>= (bits - 9);  in ext4_max_bitmap_size()
3497 		upper_limit = (1LL << 48) - 1;  in ext4_max_bitmap_size()
3515 	upper_limit -= EXT4_NDIR_BLOCKS;  in ext4_max_bitmap_size()
3518 	upper_limit -= ppb;  in ext4_max_bitmap_size()
3522 		res -= meta_blocks;  in ext4_max_bitmap_size()
3526 	upper_limit -= ppb * ppb;  in ext4_max_bitmap_size()
3530 	res -= meta_blocks;  in ext4_max_bitmap_size()
3546 	first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);  in descriptor_loc()
3550 	bg = sbi->s_desc_per_block * nr;  in descriptor_loc()
3560 	if (sb->s_blocksize == 1024 && nr == 0 &&  in descriptor_loc()
3561 	    le32_to_cpu(sbi->s_es->s_first_data_block) == 0)  in descriptor_loc()
3580 	unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride);  in ext4_get_stripe_size()
3582 			le32_to_cpu(sbi->s_es->s_raid_stripe_width);  in ext4_get_stripe_size()
3585 	if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3586 		ret = sbi->s_stripe;  in ext4_get_stripe_size()
3587 	else if (stripe_width && stripe_width <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3589 	else if (stride && stride <= sbi->s_blocks_per_group)  in ext4_get_stripe_size()
3616 			(le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) &  in ext4_feature_set_ok()
3629 	if (EXT4_SB(sb)->s_es->s_def_hash_version == DX_HASH_SIPHASH &&  in ext4_feature_set_ok()
3641 		ext4_msg(sb, KERN_INFO, "filesystem is read-only");  in ext4_feature_set_ok()
3642 		sb->s_flags |= SB_RDONLY;  in ext4_feature_set_ok()
3646 	/* Check that feature set is OK for a read-write mount */  in ext4_feature_set_ok()
3650 			 (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) &  in ext4_feature_set_ok()
3679 	struct super_block *sb = sbi->s_sb;  in print_daily_error_info()
3680 	struct ext4_super_block *es = sbi->s_es;  in print_daily_error_info()  local
3682 	if (es->s_error_count)  in print_daily_error_info()
3685 			 le32_to_cpu(es->s_error_count));  in print_daily_error_info()
3686 	if (es->s_first_error_time) {  in print_daily_error_info()
3687 		printk(KERN_NOTICE "EXT4-fs (%s): initial 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_first_error_time),  in print_daily_error_info()
3690 		       (int) sizeof(es->s_first_error_func),  in print_daily_error_info()
3691 		       es->s_first_error_func,  in print_daily_error_info()
3692 		       le32_to_cpu(es->s_first_error_line));  in print_daily_error_info()
3693 		if (es->s_first_error_ino)  in print_daily_error_info()
3695 			       le32_to_cpu(es->s_first_error_ino));  in print_daily_error_info()
3696 		if (es->s_first_error_block)  in print_daily_error_info()
3698 			       le64_to_cpu(es->s_first_error_block));  in print_daily_error_info()
3701 	if (es->s_last_error_time) {  in print_daily_error_info()
3702 		printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d",  in print_daily_error_info()
3703 		       sb->s_id,  in print_daily_error_info()
3704 		       ext4_get_tstamp(es, s_last_error_time),  in print_daily_error_info()
3705 		       (int) sizeof(es->s_last_error_func),  in print_daily_error_info()
3706 		       es->s_last_error_func,  in print_daily_error_info()
3707 		       le32_to_cpu(es->s_last_error_line));  in print_daily_error_info()
3708 		if (es->s_last_error_ino)  in print_daily_error_info()
3710 			       le32_to_cpu(es->s_last_error_ino));  in print_daily_error_info()
3711 		if (es->s_last_error_block)  in print_daily_error_info()
3713 			       le64_to_cpu(es->s_last_error_block));  in print_daily_error_info()
3716 	mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);  /* Once a day */  in print_daily_error_info()
3723 	struct super_block *sb = elr->lr_super;  in ext4_run_li_request()
3724 	ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;  in ext4_run_li_request()
3725 	ext4_group_t group = elr->lr_next_group;  in ext4_run_li_request()
3728 	int nr = EXT4_SB(sb)->s_mb_prefetch;  in ext4_run_li_request()
3731 	if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) {  in ext4_run_li_request()
3732 		elr->lr_next_group = ext4_mb_prefetch(sb, group, nr, &prefetch_ios);  in ext4_run_li_request()
3733 		ext4_mb_prefetch_fini(sb, elr->lr_next_group, nr);  in ext4_run_li_request()
3734 		trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, nr);  in ext4_run_li_request()
3735 		if (group >= elr->lr_next_group) {  in ext4_run_li_request()
3737 			if (elr->lr_first_not_zeroed != ngroups &&  in ext4_run_li_request()
3739 				elr->lr_next_group = elr->lr_first_not_zeroed;  in ext4_run_li_request()
3740 				elr->lr_mode = EXT4_LI_MODE_ITABLE;  in ext4_run_li_request()
3754 		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_run_li_request()
3764 					    elr->lr_timeout ? 0 : 1);  in ext4_run_li_request()
3766 		if (elr->lr_timeout == 0) {  in ext4_run_li_request()
3767 			elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) *  in ext4_run_li_request()
3768 				EXT4_SB(elr->lr_super)->s_li_wait_mult);  in ext4_run_li_request()
3770 		elr->lr_next_sched = jiffies + elr->lr_timeout;  in ext4_run_li_request()
3771 		elr->lr_next_group = group + 1;  in ext4_run_li_request()
3785 	list_del(&elr->lr_request);  in ext4_remove_li_request()
3786 	EXT4_SB(elr->lr_super)->s_li_request = NULL;  in ext4_remove_li_request()
3798 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_unregister_li_request()
3799 	ext4_remove_li_request(EXT4_SB(sb)->s_li_request);  in ext4_unregister_li_request()
3800 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_unregister_li_request()
3829 		mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3830 		if (list_empty(&eli->li_request_list)) {  in ext4_lazyinit_thread()
3831 			mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3834 		list_for_each_safe(pos, n, &eli->li_request_list) {  in ext4_lazyinit_thread()
3840 			if (time_before(jiffies, elr->lr_next_sched)) {  in ext4_lazyinit_thread()
3841 				if (time_before(elr->lr_next_sched, next_wakeup))  in ext4_lazyinit_thread()
3842 					next_wakeup = elr->lr_next_sched;  in ext4_lazyinit_thread()
3845 			if (down_read_trylock(&elr->lr_super->s_umount)) {  in ext4_lazyinit_thread()
3846 				if (sb_start_write_trylock(elr->lr_super)) {  in ext4_lazyinit_thread()
3849 					 * We hold sb->s_umount, sb can not  in ext4_lazyinit_thread()
3853 					mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3855 					sb_end_write(elr->lr_super);  in ext4_lazyinit_thread()
3856 					mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3857 					n = pos->next;  in ext4_lazyinit_thread()
3859 				up_read((&elr->lr_super->s_umount));  in ext4_lazyinit_thread()
3867 				elr->lr_next_sched = jiffies +  in ext4_lazyinit_thread()
3870 			if (time_before(elr->lr_next_sched, next_wakeup))  in ext4_lazyinit_thread()
3871 				next_wakeup = elr->lr_next_sched;  in ext4_lazyinit_thread()
3873 		mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3884 		schedule_timeout_interruptible(next_wakeup - cur);  in ext4_lazyinit_thread()
3902 	mutex_lock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3903 	if (!list_empty(&eli->li_request_list)) {  in ext4_lazyinit_thread()
3904 		mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3908 	mutex_unlock(&eli->li_list_mtx);  in ext4_lazyinit_thread()
3921 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_clear_request_list()
3922 	list_for_each_safe(pos, n, &ext4_li_info->li_request_list) {  in ext4_clear_request_list()
3927 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_clear_request_list()
3939 		printk(KERN_CRIT "EXT4-fs: error %d creating inode table "  in ext4_run_lazyinit_thread()
3944 	ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING;  in ext4_run_lazyinit_thread()
3956 	ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count;  in ext4_has_uninit_itable()
3967 		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))  in ext4_has_uninit_itable()
3980 		return -ENOMEM;  in ext4_li_info_new()
3982 	INIT_LIST_HEAD(&eli->li_request_list);  in ext4_li_info_new()
3983 	mutex_init(&eli->li_list_mtx);  in ext4_li_info_new()
3985 	eli->li_state |= EXT4_LAZYINIT_QUIT;  in ext4_li_info_new()
4001 	elr->lr_super = sb;  in ext4_li_request_new()
4002 	elr->lr_first_not_zeroed = start;  in ext4_li_request_new()
4004 		elr->lr_mode = EXT4_LI_MODE_ITABLE;  in ext4_li_request_new()
4005 		elr->lr_next_group = start;  in ext4_li_request_new()
4007 		elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP;  in ext4_li_request_new()
4015 	elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);  in ext4_li_request_new()
4024 	ext4_group_t ngroups = sbi->s_groups_count;  in ext4_register_li_request()
4028 	if (sbi->s_li_request != NULL) {  in ext4_register_li_request()
4033 		sbi->s_li_request->lr_timeout = 0;  in ext4_register_li_request()
4044 		ret = -ENOMEM;  in ext4_register_li_request()
4054 	mutex_lock(&ext4_li_info->li_list_mtx);  in ext4_register_li_request()
4055 	list_add(&elr->lr_request, &ext4_li_info->li_request_list);  in ext4_register_li_request()
4056 	mutex_unlock(&ext4_li_info->li_list_mtx);  in ext4_register_li_request()
4058 	sbi->s_li_request = elr;  in ext4_register_li_request()
4066 	if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) {  in ext4_register_li_request()
4110 	jbd2_journal_clear_features(sbi->s_journal,  in set_journal_csum_feature_set()
4115 		ret = jbd2_journal_set_features(sbi->s_journal,  in set_journal_csum_feature_set()
4120 		ret = jbd2_journal_set_features(sbi->s_journal,  in set_journal_csum_feature_set()
4123 		jbd2_journal_clear_features(sbi->s_journal, 0, 0,  in set_journal_csum_feature_set()
4126 		jbd2_journal_clear_features(sbi->s_journal, 0, 0,  in set_journal_csum_feature_set()
4141  * older file systems --- and if we come across with a bigalloc file
4143  * correct especially for very large cluster sizes --- but for newer
4146  * present (even for non-bigalloc file systems), we will use it.
4160 			(has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) +  in count_overhead()
4161 			sbi->s_itb_per_group + 2);  in count_overhead()
4163 	first_block = le32_to_cpu(sbi->s_es->s_first_data_block) +  in count_overhead()
4165 	last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1;  in count_overhead()
4170 			ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);  in count_overhead()
4175 			ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);  in count_overhead()
4179 		if (b >= first_block && b + sbi->s_itb_per_group <= last_block)  in count_overhead()
4180 			for (j = 0; j < sbi->s_itb_per_group; j++, b++) {  in count_overhead()
4181 				int c = EXT4_B2C(sbi, b - first_block);  in count_overhead()
4196 			j = EXT4_BLOCKS_PER_GROUP(sb) - s;  in count_overhead()
4199 		for (; j > 0; j--)  in count_overhead()
4204 	return EXT4_CLUSTERS_PER_GROUP(sb) -  in count_overhead()
4209  * Compute the overhead and stash it in sbi->s_overhead
4214 	struct ext4_super_block *es = sbi->s_es;  in ext4_calculate_overhead()  local
4216 	unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum);  in ext4_calculate_overhead()
4222 		return -ENOMEM;  in ext4_calculate_overhead()
4233 	overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block));  in ext4_calculate_overhead()
4252 	if (sbi->s_journal && !sbi->s_journal_bdev)  in ext4_calculate_overhead()
4253 		overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len);  in ext4_calculate_overhead()
4254 	else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {  in ext4_calculate_overhead()
4255 		/* j_inum for internal journal is non-zero */  in ext4_calculate_overhead()
4258 			j_blocks = j_inode->i_size >> sb->s_blocksize_bits;  in ext4_calculate_overhead()
4265 	sbi->s_overhead = overhead;  in ext4_calculate_overhead()
4292 	resv_clusters = (ext4_blocks_count(sbi->s_es) >>  in ext4_set_resv_clusters()
4293 			 sbi->s_cluster_bits);  in ext4_set_resv_clusters()
4298 	atomic64_set(&sbi->s_resv_clusters, resv_clusters);  in ext4_set_resv_clusters()
4307 	if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb))  in ext4_quota_mode()
4326 	sbi->s_journal_triggers[type].sb = sb;  in ext4_setup_csum_trigger()
4327 	sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger;  in ext4_setup_csum_trigger()
4335 	kfree(sbi->s_blockgroup_lock);  in ext4_free_sbi()
4336 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_free_sbi()
4348 	sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off,  in ext4_alloc_sbi()
4351 	sbi->s_blockgroup_lock =  in ext4_alloc_sbi()
4354 	if (!sbi->s_blockgroup_lock)  in ext4_alloc_sbi()
4357 	sb->s_fs_info = sbi;  in ext4_alloc_sbi()
4358 	sbi->s_sb = sb;  in ext4_alloc_sbi()
4361 	fs_put_dax(sbi->s_daxdev, NULL);  in ext4_alloc_sbi()
4367 			      struct ext4_super_block *es)  in ext4_set_def_opts()  argument
4372 	def_mount_opts = le32_to_cpu(es->s_default_mount_opts);  in ext4_set_def_opts()
4387 	/* don't forget to enable journal_csum when metadata_csum is enabled. */  in ext4_set_def_opts()
4398 	if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC)  in ext4_set_def_opts()
4400 	else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE)  in ext4_set_def_opts()
4413 	 * enable delayed allocation by default  in ext4_set_def_opts()
4414 	 * Use -o nodelalloc to turn it off  in ext4_set_def_opts()
4420 	if (sb->s_blocksize == PAGE_SIZE)  in ext4_set_def_opts()
4427 	struct ext4_super_block *es = sbi->s_es;  in ext4_handle_clustersize()  local
4431 	clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size);  in ext4_handle_clustersize()
4433 		if (clustersize < sb->s_blocksize) {  in ext4_handle_clustersize()
4436 				 "block size (%lu)", clustersize, sb->s_blocksize);  in ext4_handle_clustersize()
4437 			return -EINVAL;  in ext4_handle_clustersize()
4439 		sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) -  in ext4_handle_clustersize()
4440 			le32_to_cpu(es->s_log_block_size);  in ext4_handle_clustersize()
4441 		sbi->s_clusters_per_group =  in ext4_handle_clustersize()
4442 			le32_to_cpu(es->s_clusters_per_group);  in ext4_handle_clustersize()
4443 		if (sbi->s_clusters_per_group > sb->s_blocksize * 8) {  in ext4_handle_clustersize()
4446 				 sbi->s_clusters_per_group);  in ext4_handle_clustersize()
4447 			return -EINVAL;  in ext4_handle_clustersize()
4449 		if (sbi->s_blocks_per_group !=  in ext4_handle_clustersize()
4450 		    (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) {  in ext4_handle_clustersize()
4453 				 sbi->s_blocks_per_group,  in ext4_handle_clustersize()
4454 				 sbi->s_clusters_per_group);  in ext4_handle_clustersize()
4455 			return -EINVAL;  in ext4_handle_clustersize()
4458 		if (clustersize != sb->s_blocksize) {  in ext4_handle_clustersize()
4461 				 "block size (%lu)", clustersize, sb->s_blocksize);  in ext4_handle_clustersize()
4462 			return -EINVAL;  in ext4_handle_clustersize()
4464 		if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {  in ext4_handle_clustersize()
4467 				 sbi->s_blocks_per_group);  in ext4_handle_clustersize()
4468 			return -EINVAL;  in ext4_handle_clustersize()
4470 		sbi->s_clusters_per_group = sbi->s_blocks_per_group;  in ext4_handle_clustersize()
4471 		sbi->s_cluster_bits = 0;  in ext4_handle_clustersize()
4473 	sbi->s_cluster_ratio = clustersize / sb->s_blocksize;  in ext4_handle_clustersize()
4476 	if (sbi->s_blocks_per_group == clustersize << 3)  in ext4_handle_clustersize()
4487 	atomic_set(&sbi->s_fc_subtid, 0);  in ext4_fast_commit_init()
4488 	INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);  in ext4_fast_commit_init()
4489 	INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);  in ext4_fast_commit_init()
4490 	INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);  in ext4_fast_commit_init()
4491 	INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);  in ext4_fast_commit_init()
4492 	sbi->s_fc_bytes = 0;  in ext4_fast_commit_init()
4494 	sbi->s_fc_ineligible_tid = 0;  in ext4_fast_commit_init()
4495 	spin_lock_init(&sbi->s_fc_lock);  in ext4_fast_commit_init()
4496 	memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats));  in ext4_fast_commit_init()
4497 	sbi->s_fc_replay_state.fc_regions = NULL;  in ext4_fast_commit_init()
4498 	sbi->s_fc_replay_state.fc_regions_size = 0;  in ext4_fast_commit_init()
4499 	sbi->s_fc_replay_state.fc_regions_used = 0;  in ext4_fast_commit_init()
4500 	sbi->s_fc_replay_state.fc_regions_valid = 0;  in ext4_fast_commit_init()
4501 	sbi->s_fc_replay_state.fc_modified_inodes = NULL;  in ext4_fast_commit_init()
4502 	sbi->s_fc_replay_state.fc_modified_inodes_size = 0;  in ext4_fast_commit_init()
4503 	sbi->s_fc_replay_state.fc_modified_inodes_used = 0;  in ext4_fast_commit_init()
4507 				struct ext4_super_block *es)  in ext4_inode_info_init()  argument
4511 	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {  in ext4_inode_info_init()
4512 		sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;  in ext4_inode_info_init()
4513 		sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;  in ext4_inode_info_init()
4515 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);  in ext4_inode_info_init()
4516 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);  in ext4_inode_info_init()
4517 		if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) {  in ext4_inode_info_init()
4519 				 sbi->s_first_ino);  in ext4_inode_info_init()
4520 			return -EINVAL;  in ext4_inode_info_init()
4522 		if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||  in ext4_inode_info_init()
4523 		    (!is_power_of_2(sbi->s_inode_size)) ||  in ext4_inode_info_init()
4524 		    (sbi->s_inode_size > sb->s_blocksize)) {  in ext4_inode_info_init()
4527 			       sbi->s_inode_size);  in ext4_inode_info_init()
4528 			ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize);  in ext4_inode_info_init()
4529 			return -EINVAL;  in ext4_inode_info_init()
4537 		if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +  in ext4_inode_info_init()
4538 			sizeof(((struct ext4_inode *)0)->i_atime_extra)) {  in ext4_inode_info_init()
4539 			sb->s_time_gran = 1;  in ext4_inode_info_init()
4540 			sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;  in ext4_inode_info_init()
4542 			sb->s_time_gran = NSEC_PER_SEC;  in ext4_inode_info_init()
4543 			sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;  in ext4_inode_info_init()
4545 		sb->s_time_min = EXT4_TIMESTAMP_MIN;  in ext4_inode_info_init()
4548 	if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {  in ext4_inode_info_init()
4549 		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -  in ext4_inode_info_init()
4552 			unsigned v, max = (sbi->s_inode_size -  in ext4_inode_info_init()
4555 			v = le16_to_cpu(es->s_want_extra_isize);  in ext4_inode_info_init()
4559 				return -EINVAL;  in ext4_inode_info_init()
4561 			if (sbi->s_want_extra_isize < v)  in ext4_inode_info_init()
4562 				sbi->s_want_extra_isize = v;  in ext4_inode_info_init()
4564 			v = le16_to_cpu(es->s_min_extra_isize);  in ext4_inode_info_init()
4568 				return -EINVAL;  in ext4_inode_info_init()
4570 			if (sbi->s_want_extra_isize < v)  in ext4_inode_info_init()
4571 				sbi->s_want_extra_isize = v;  in ext4_inode_info_init()
4579 static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)  in ext4_encoding_init()  argument
4583 	__u16 encoding_flags = le16_to_cpu(es->s_encoding_flags);  in ext4_encoding_init()
4585 	if (!ext4_has_feature_casefold(sb) || sb->s_encoding)  in ext4_encoding_init()
4588 	encoding_info = ext4_sb_read_encoding(es);  in ext4_encoding_init()
4592 		return -EINVAL;  in ext4_encoding_init()
4595 	encoding = utf8_load(encoding_info->version);  in ext4_encoding_init()
4598 			"can't mount with superblock charset: %s-%u.%u.%u "  in ext4_encoding_init()
4600 			encoding_info->name,  in ext4_encoding_init()
4601 			unicode_major(encoding_info->version),  in ext4_encoding_init()
4602 			unicode_minor(encoding_info->version),  in ext4_encoding_init()
4603 			unicode_rev(encoding_info->version),  in ext4_encoding_init()
4605 		return -EINVAL;  in ext4_encoding_init()
4608 		"%s-%u.%u.%u with flags 0x%hx", encoding_info->name,  in ext4_encoding_init()
4609 		unicode_major(encoding_info->version),  in ext4_encoding_init()
4610 		unicode_minor(encoding_info->version),  in ext4_encoding_init()
4611 		unicode_rev(encoding_info->version),  in ext4_encoding_init()
4614 	sb->s_encoding = encoding;  in ext4_encoding_init()
4615 	sb->s_encoding_flags = encoding_flags;  in ext4_encoding_init()
4620 static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)  in ext4_encoding_init()  argument
4626 static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es)  in ext4_init_metadata_csum()  argument
4637 	if (!ext4_verify_csum_type(sb, es)) {  in ext4_init_metadata_csum()
4640 		return -EINVAL;  in ext4_init_metadata_csum()
4646 	sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);  in ext4_init_metadata_csum()
4647 	if (IS_ERR(sbi->s_chksum_driver)) {  in ext4_init_metadata_csum()
4648 		int ret = PTR_ERR(sbi->s_chksum_driver);  in ext4_init_metadata_csum()
4650 		sbi->s_chksum_driver = NULL;  in ext4_init_metadata_csum()
4655 	if (!ext4_superblock_csum_verify(sb, es)) {  in ext4_init_metadata_csum()
4658 		return -EFSBADCRC;  in ext4_init_metadata_csum()
4663 		sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed);  in ext4_init_metadata_csum()
4665 		sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,  in ext4_init_metadata_csum()
4666 					       sizeof(es->s_uuid));  in ext4_init_metadata_csum()
4671 					    struct ext4_super_block *es,  in ext4_check_feature_compatibility()  argument
4676 	if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV &&  in ext4_check_feature_compatibility()
4684 	if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) {  in ext4_check_feature_compatibility()
4688 				 "The Hurd can't support 64-bit file systems");  in ext4_check_feature_compatibility()
4689 			return -EINVAL;  in ext4_check_feature_compatibility()
4699 			return -EINVAL;  in ext4_check_feature_compatibility()
4713 				return -EINVAL;  in ext4_check_feature_compatibility()
4716 			return -EINVAL;  in ext4_check_feature_compatibility()
4730 				return -EINVAL;  in ext4_check_feature_compatibility()
4733 			return -EINVAL;  in ext4_check_feature_compatibility()
4743 		return -EINVAL;  in ext4_check_feature_compatibility()
4745 	if (sbi->s_daxdev) {  in ext4_check_feature_compatibility()
4746 		if (sb->s_blocksize == PAGE_SIZE)  in ext4_check_feature_compatibility()
4747 			set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);  in ext4_check_feature_compatibility()
4752 	if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {  in ext4_check_feature_compatibility()
4756 			return -EINVAL;  in ext4_check_feature_compatibility()
4758 		if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) {  in ext4_check_feature_compatibility()
4761 			return -EINVAL;  in ext4_check_feature_compatibility()
4765 	if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {  in ext4_check_feature_compatibility()
4767 			 es->s_encryption_level);  in ext4_check_feature_compatibility()
4768 		return -EINVAL;  in ext4_check_feature_compatibility()
4775 			       struct ext4_super_block *es)  in ext4_check_geometry()  argument
4781 	if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) {  in ext4_check_geometry()
4784 			 le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks));  in ext4_check_geometry()
4785 		return -EINVAL;  in ext4_check_geometry()
4791 	err = generic_check_addressable(sb->s_blocksize_bits,  in ext4_check_geometry()
4792 					ext4_blocks_count(es));  in ext4_check_geometry()
4801 	if (blocks_count && ext4_blocks_count(es) > blocks_count) {  in ext4_check_geometry()
4804 		       ext4_blocks_count(es), blocks_count);  in ext4_check_geometry()
4805 		return -EINVAL;  in ext4_check_geometry()
4812 	if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) {  in ext4_check_geometry()
4815 			 le32_to_cpu(es->s_first_data_block),  in ext4_check_geometry()
4816 			 ext4_blocks_count(es));  in ext4_check_geometry()
4817 		return -EINVAL;  in ext4_check_geometry()
4819 	if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) &&  in ext4_check_geometry()
4820 	    (sbi->s_cluster_ratio == 1)) {  in ext4_check_geometry()
4823 		return -EINVAL;  in ext4_check_geometry()
4826 	blocks_count = (ext4_blocks_count(es) -  in ext4_check_geometry()
4827 			le32_to_cpu(es->s_first_data_block) +  in ext4_check_geometry()
4828 			EXT4_BLOCKS_PER_GROUP(sb) - 1);  in ext4_check_geometry()
4830 	if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) {  in ext4_check_geometry()
4834 		       ext4_blocks_count(es),  in ext4_check_geometry()
4835 		       le32_to_cpu(es->s_first_data_block),  in ext4_check_geometry()
4837 		return -EINVAL;  in ext4_check_geometry()
4839 	sbi->s_groups_count = blocks_count;  in ext4_check_geometry()
4840 	sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,  in ext4_check_geometry()
4842 	if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) !=  in ext4_check_geometry()
4843 	    le32_to_cpu(es->s_inodes_count)) {  in ext4_check_geometry()
4845 			 le32_to_cpu(es->s_inodes_count),  in ext4_check_geometry()
4846 			 ((u64)sbi->s_groups_count * sbi->s_inodes_per_group));  in ext4_check_geometry()
4847 		return -EINVAL;  in ext4_check_geometry()
4854 				struct ext4_super_block *es,  in ext4_group_desc_init()  argument
4863 	db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /  in ext4_group_desc_init()
4866 		if (le32_to_cpu(es->s_first_meta_bg) > db_count) {  in ext4_group_desc_init()
4870 				 le32_to_cpu(es->s_first_meta_bg), db_count);  in ext4_group_desc_init()
4871 			return -EINVAL;  in ext4_group_desc_init()
4874 	rcu_assign_pointer(sbi->s_group_desc,  in ext4_group_desc_init()
4878 	if (sbi->s_group_desc == NULL) {  in ext4_group_desc_init()
4880 		return -ENOMEM;  in ext4_group_desc_init()
4883 	bgl_lock_init(sbi->s_blockgroup_lock);  in ext4_group_desc_init()
4885 	/* Pre-read the descriptors into the buffer cache */  in ext4_group_desc_init()
4899 			sbi->s_gdb_count = i;  in ext4_group_desc_init()
4903 		rcu_dereference(sbi->s_group_desc)[i] = bh;  in ext4_group_desc_init()
4906 	sbi->s_gdb_count = db_count;  in ext4_group_desc_init()
4909 		return -EFSCORRUPTED;  in ext4_group_desc_init()
4916 				      struct ext4_super_block *es,  in ext4_load_and_init_journal()  argument
4922 	err = ext4_load_journal(sb, es, ctx->journal_devnum);  in ext4_load_and_init_journal()
4927 	    !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,  in ext4_load_and_init_journal()
4929 		ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");  in ext4_load_and_init_journal()
4940 		!jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,  in ext4_load_and_init_journal()
4956 		    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {  in ext4_load_and_init_journal()
4958 			sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;  in ext4_load_and_init_journal()
4961 			sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;  in ext4_load_and_init_journal()
4968 		    (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {  in ext4_load_and_init_journal()
4985 	set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);  in ext4_load_and_init_journal()
4987 	sbi->s_journal->j_submit_inode_data_buffers =  in ext4_load_and_init_journal()
4989 	sbi->s_journal->j_finish_inode_data_buffers =  in ext4_load_and_init_journal()
4996 	flush_work(&sbi->s_sb_upd_work);  in ext4_load_and_init_journal()
4997 	jbd2_journal_destroy(sbi->s_journal);  in ext4_load_and_init_journal()
4998 	sbi->s_journal = NULL;  in ext4_load_and_init_journal()
4999 	return -EINVAL;  in ext4_load_and_init_journal()
5005 		printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with "  in ext4_check_journal_data_mode()
5014 			return -EINVAL;  in ext4_check_journal_data_mode()
5019 			return -EINVAL;  in ext4_check_journal_data_mode()
5029 		sb->s_iflags |= SB_I_CGROUPWB;  in ext4_check_journal_data_mode()
5039 	struct ext4_super_block *es;  in ext4_load_super()  local
5043 	int ret = -EINVAL;  in ext4_load_super()
5049 		return -EINVAL;  in ext4_load_super()
5057 		logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;  in ext4_load_super()
5060 		logical_sb_block = sbi->s_sb_block;  in ext4_load_super()
5070 	 *       some ext4 macro-instructions depend on its value  in ext4_load_super()
5072 	es = (struct ext4_super_block *) (bh->b_data + offset);  in ext4_load_super()
5073 	sbi->s_es = es;  in ext4_load_super()
5074 	sb->s_magic = le16_to_cpu(es->s_magic);  in ext4_load_super()
5075 	if (sb->s_magic != EXT4_SUPER_MAGIC) {  in ext4_load_super()
5081 	if (le32_to_cpu(es->s_log_block_size) >  in ext4_load_super()
5082 	    (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {  in ext4_load_super()
5085 			 le32_to_cpu(es->s_log_block_size));  in ext4_load_super()
5088 	if (le32_to_cpu(es->s_log_cluster_size) >  in ext4_load_super()
5089 	    (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {  in ext4_load_super()
5092 			 le32_to_cpu(es->s_log_cluster_size));  in ext4_load_super()
5096 	blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);  in ext4_load_super()
5102 	if (sb->s_blocksize == blocksize) {  in ext4_load_super()
5104 		sbi->s_sbh = bh;  in ext4_load_super()
5122 	logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;  in ext4_load_super()
5131 	es = (struct ext4_super_block *)(bh->b_data + offset);  in ext4_load_super()
5132 	sbi->s_es = es;  in ext4_load_super()
5133 	if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {  in ext4_load_super()
5138 	sbi->s_sbh = bh;  in ext4_load_super()
5148 	struct ext4_super_block *es = sbi->s_es;  in ext4_hash_info_init()  local
5152 		sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);  in ext4_hash_info_init()
5154 	sbi->s_def_hash_version = es->s_def_hash_version;  in ext4_hash_info_init()
5156 		i = le32_to_cpu(es->s_flags);  in ext4_hash_info_init()
5158 			sbi->s_hash_unsigned = 3;  in ext4_hash_info_init()
5162 				es->s_flags |=  in ext4_hash_info_init()
5164 			sbi->s_hash_unsigned = 3;  in ext4_hash_info_init()
5167 				es->s_flags |=  in ext4_hash_info_init()
5177 	struct ext4_super_block *es = sbi->s_es;  in ext4_block_group_meta_init()  local
5181 	sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,  in ext4_block_group_meta_init()
5183 	sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);  in ext4_block_group_meta_init()
5185 	sbi->s_desc_size = le16_to_cpu(es->s_desc_size);  in ext4_block_group_meta_init()
5187 		if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||  in ext4_block_group_meta_init()
5188 		    sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||  in ext4_block_group_meta_init()
5189 		    !is_power_of_2(sbi->s_desc_size)) {  in ext4_block_group_meta_init()
5192 			       sbi->s_desc_size);  in ext4_block_group_meta_init()
5193 			return -EINVAL;  in ext4_block_group_meta_init()
5196 		sbi->s_desc_size = EXT4_MIN_DESC_SIZE;  in ext4_block_group_meta_init()
5198 	sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);  in ext4_block_group_meta_init()
5199 	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);  in ext4_block_group_meta_init()
5201 	sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb);  in ext4_block_group_meta_init()
5202 	if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {  in ext4_block_group_meta_init()
5205 		return -EINVAL;  in ext4_block_group_meta_init()
5207 	if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||  in ext4_block_group_meta_init()
5208 	    sbi->s_inodes_per_group > sb->s_blocksize * 8) {  in ext4_block_group_meta_init()
5210 			 sbi->s_inodes_per_group);  in ext4_block_group_meta_init()
5211 		return -EINVAL;  in ext4_block_group_meta_init()
5213 	sbi->s_itb_per_group = sbi->s_inodes_per_group /  in ext4_block_group_meta_init()
5214 					sbi->s_inodes_per_block;  in ext4_block_group_meta_init()
5215 	sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb);  in ext4_block_group_meta_init()
5216 	sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY;  in ext4_block_group_meta_init()
5217 	sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));  in ext4_block_group_meta_init()
5218 	sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));  in ext4_block_group_meta_init()
5231 	return (stripe > 0 && sbi->s_cluster_ratio > 1 &&  in ext4_is_stripe_incompatible()
5232 		stripe % sbi->s_cluster_ratio != 0);  in ext4_is_stripe_incompatible()
5237 	struct ext4_super_block *es = NULL;  in __ext4_fill_super()  local
5244 	struct ext4_fs_context *ctx = fc->fs_private;  in __ext4_fill_super()
5245 	int silent = fc->sb_flags & SB_SILENT;  in __ext4_fill_super()
5248 	if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO))  in __ext4_fill_super()
5249 		ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;  in __ext4_fill_super()
5251 	sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;  in __ext4_fill_super()
5252 	sbi->s_sectors_written_start =  in __ext4_fill_super()
5253 		part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);  in __ext4_fill_super()
5259 	es = sbi->s_es;  in __ext4_fill_super()
5260 	sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);  in __ext4_fill_super()
5262 	err = ext4_init_metadata_csum(sb, es);  in __ext4_fill_super()
5266 	ext4_set_def_opts(sb, es);  in __ext4_fill_super()
5268 	sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));  in __ext4_fill_super()
5269 	sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));  in __ext4_fill_super()
5270 	sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ;  in __ext4_fill_super()
5271 	sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;  in __ext4_fill_super()
5272 	sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;  in __ext4_fill_super()
5278 	sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;  in __ext4_fill_super()
5280 	err = ext4_inode_info_init(sb, es);  in __ext4_fill_super()
5288 	sbi->s_def_mount_opt = sbi->s_mount_opt;  in __ext4_fill_super()
5289 	sbi->s_def_mount_opt2 = sbi->s_mount_opt2;  in __ext4_fill_super()
5297 	err = ext4_encoding_init(sb, es);  in __ext4_fill_super()
5305 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in __ext4_fill_super()
5309 	sb->s_flags |= SB_I_VERSION;  in __ext4_fill_super()
5311 	err = ext4_check_feature_compatibility(sb, es, silent);  in __ext4_fill_super()
5325 	err = ext4_check_geometry(sb, es);  in __ext4_fill_super()
5329 	timer_setup(&sbi->s_err_report, print_daily_error_info, 0);  in __ext4_fill_super()
5330 	spin_lock_init(&sbi->s_error_lock);  in __ext4_fill_super()
5331 	INIT_WORK(&sbi->s_sb_upd_work, update_super_work);  in __ext4_fill_super()
5333 	err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed);  in __ext4_fill_super()
5341 	sbi->s_stripe = ext4_get_stripe_size(sbi);  in __ext4_fill_super()
5342 	if (ext4_is_stripe_incompatible(sb, sbi->s_stripe)) {  in __ext4_fill_super()
5346 			 sbi->s_stripe, sbi->s_cluster_ratio);  in __ext4_fill_super()
5347 		sbi->s_stripe = 0;  in __ext4_fill_super()
5349 	sbi->s_extent_max_zeroout_kb = 32;  in __ext4_fill_super()
5354 	sb->s_op = &ext4_sops;  in __ext4_fill_super()
5355 	sb->s_export_op = &ext4_export_ops;  in __ext4_fill_super()
5356 	sb->s_xattr = ext4_xattr_handlers;  in __ext4_fill_super()
5358 	sb->s_cop = &ext4_cryptops;  in __ext4_fill_super()
5361 	sb->s_vop = &ext4_verityops;  in __ext4_fill_super()
5364 	sb->dq_op = &ext4_quota_operations;  in __ext4_fill_super()
5366 		sb->s_qcop = &dquot_quotactl_sysfile_ops;  in __ext4_fill_super()
5368 		sb->s_qcop = &ext4_qctl_operations;  in __ext4_fill_super()
5369 	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;  in __ext4_fill_super()
5371 	memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));  in __ext4_fill_super()
5373 	INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */  in __ext4_fill_super()
5374 	mutex_init(&sbi->s_orphan_lock);  in __ext4_fill_super()
5376 	spin_lock_init(&sbi->s_bdev_wb_lock);  in __ext4_fill_super()
5380 	sb->s_root = NULL;  in __ext4_fill_super()
5382 	needs_recovery = (es->s_last_orphan != 0 ||  in __ext4_fill_super()
5387 		err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block));  in __ext4_fill_super()
5392 	err = -EINVAL;  in __ext4_fill_super()
5398 		err = ext4_load_and_init_journal(sb, es, ctx);  in __ext4_fill_super()
5404 		       "suppressed and not mounted read-only");  in __ext4_fill_super()
5419 		if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {  in __ext4_fill_super()
5422 				 sbi->s_commit_interval / HZ);  in __ext4_fill_super()
5426 		    (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {  in __ext4_fill_super()
5431 		sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;  in __ext4_fill_super()
5435 		sbi->s_journal = NULL;  in __ext4_fill_super()
5440 		sbi->s_ea_block_cache = ext4_xattr_create_cache();  in __ext4_fill_super()
5441 		if (!sbi->s_ea_block_cache) {  in __ext4_fill_super()
5444 			err = -EINVAL;  in __ext4_fill_super()
5449 			sbi->s_ea_inode_cache = ext4_xattr_create_cache();  in __ext4_fill_super()
5450 			if (!sbi->s_ea_inode_cache) {  in __ext4_fill_super()
5453 				err = -EINVAL;  in __ext4_fill_super()
5463 	sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters);  in __ext4_fill_super()
5465 	if (sbi->s_overhead > ext4_blocks_count(es))  in __ext4_fill_super()
5466 		sbi->s_overhead = 0;  in __ext4_fill_super()
5473 		sbi->s_overhead = 0;  in __ext4_fill_super()
5474 	if (sbi->s_overhead == 0) {  in __ext4_fill_super()
5484 	EXT4_SB(sb)->rsv_conversion_wq =  in __ext4_fill_super()
5485 		alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);  in __ext4_fill_super()
5486 	if (!EXT4_SB(sb)->rsv_conversion_wq) {  in __ext4_fill_super()
5487 		printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");  in __ext4_fill_super()
5488 		err = -ENOMEM;  in __ext4_fill_super()
5504 	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {  in __ext4_fill_super()
5507 		err = -EFSCORRUPTED;  in __ext4_fill_super()
5511 	sb->s_root = d_make_root(root);  in __ext4_fill_super()
5512 	if (!sb->s_root) {  in __ext4_fill_super()
5514 		err = -ENOMEM;  in __ext4_fill_super()
5518 	err = ext4_setup_super(sb, es, sb_rdonly(sb));  in __ext4_fill_super()
5519 	if (err == -EROFS) {  in __ext4_fill_super()
5520 		sb->s_flags |= SB_RDONLY;  in __ext4_fill_super()
5539 	 * Enable optimize_scan if number of groups is > threshold. This can be  in __ext4_fill_super()
5543 	if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) {  in __ext4_fill_super()
5544 		if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD)  in __ext4_fill_super()
5561 	if (sbi->s_journal)  in __ext4_fill_super()
5562 		sbi->s_journal->j_commit_callback =  in __ext4_fill_super()
5574 			err = -ENOMEM;  in __ext4_fill_super()
5586 	/* Enable quota usage during mount. */  in __ext4_fill_super()
5598 	errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err,  in __ext4_fill_super()
5599 				 &sbi->s_bdev_wb_err);  in __ext4_fill_super()
5600 	EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;  in __ext4_fill_super()
5601 	ext4_orphan_cleanup(sb, es);  in __ext4_fill_super()
5602 	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;  in __ext4_fill_super()
5613 		err = ext4_mark_recovery_complete(sb, es);  in __ext4_fill_super()
5618 	if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev))  in __ext4_fill_super()
5622 	if (es->s_error_count)  in __ext4_fill_super()
5623 		mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */  in __ext4_fill_super()
5625 	/* Enable message ratelimiting. Default is 10 messages per 5 secs. */  in __ext4_fill_super()
5626 	ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5627 	ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5628 	ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);  in __ext4_fill_super()
5629 	atomic_set(&sbi->s_warning_count, 0);  in __ext4_fill_super()
5630 	atomic_set(&sbi->s_msg_count, 0);  in __ext4_fill_super()
5653 	dput(sb->s_root);  in __ext4_fill_super()
5654 	sb->s_root = NULL;  in __ext4_fill_super()
5657 	if (EXT4_SB(sb)->rsv_conversion_wq)  in __ext4_fill_super()
5658 		destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);  in __ext4_fill_super()
5660 	ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);  in __ext4_fill_super()
5661 	sbi->s_ea_inode_cache = NULL;  in __ext4_fill_super()
5663 	ext4_xattr_destroy_cache(sbi->s_ea_block_cache);  in __ext4_fill_super()
5664 	sbi->s_ea_block_cache = NULL;  in __ext4_fill_super()
5666 	if (sbi->s_journal) {  in __ext4_fill_super()
5668 		flush_work(&sbi->s_sb_upd_work);  in __ext4_fill_super()
5669 		jbd2_journal_destroy(sbi->s_journal);  in __ext4_fill_super()
5670 		sbi->s_journal = NULL;  in __ext4_fill_super()
5676 	flush_work(&sbi->s_sb_upd_work);  in __ext4_fill_super()
5678 	del_timer_sync(&sbi->s_err_report);  in __ext4_fill_super()
5681 	if (sbi->s_chksum_driver)  in __ext4_fill_super()
5682 		crypto_free_shash(sbi->s_chksum_driver);  in __ext4_fill_super()
5685 	utf8_unload(sb->s_encoding);  in __ext4_fill_super()
5692 	fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);  in __ext4_fill_super()
5693 	brelse(sbi->s_sbh);  in __ext4_fill_super()
5694 	if (sbi->s_journal_bdev) {  in __ext4_fill_super()
5695 		invalidate_bdev(sbi->s_journal_bdev);  in __ext4_fill_super()
5696 		blkdev_put(sbi->s_journal_bdev, sb);  in __ext4_fill_super()
5699 	invalidate_bdev(sb->s_bdev);  in __ext4_fill_super()
5700 	sb->s_fs_info = NULL;  in __ext4_fill_super()
5706 	struct ext4_fs_context *ctx = fc->fs_private;  in ext4_fill_super()
5713 		return -ENOMEM;  in ext4_fill_super()
5715 	fc->s_fs_info = sbi;  in ext4_fill_super()
5718 	strreplace(sb->s_id, '/', '!');  in ext4_fill_super()
5720 	sbi->s_sb_block = 1;	/* Default super block location */  in ext4_fill_super()
5721 	if (ctx->spec & EXT4_SPEC_s_sb_block)  in ext4_fill_super()
5722 		sbi->s_sb_block = ctx->s_sb_block;  in ext4_fill_super()
5728 	if (sbi->s_journal) {  in ext4_fill_super()
5738 	if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))  in ext4_fill_super()
5740 			 "Quota mode: %s.", &sb->s_uuid,  in ext4_fill_super()
5750 	fc->s_fs_info = NULL;  in ext4_fill_super()
5760  * Setup any per-fs journal parameters now.  We'll do this both on
5768 	journal->j_commit_interval = sbi->s_commit_interval;  in ext4_init_journal_params()
5769 	journal->j_min_batch_time = sbi->s_min_batch_time;  in ext4_init_journal_params()
5770 	journal->j_max_batch_time = sbi->s_max_batch_time;  in ext4_init_journal_params()
5773 	write_lock(&journal->j_state_lock);  in ext4_init_journal_params()
5775 		journal->j_flags |= JBD2_BARRIER;  in ext4_init_journal_params()
5777 		journal->j_flags &= ~JBD2_BARRIER;  in ext4_init_journal_params()
5779 		journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR;  in ext4_init_journal_params()
5781 		journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR;  in ext4_init_journal_params()
5783 	 * Always enable journal cycle record option, letting the journal  in ext4_init_journal_params()
5786 	journal->j_flags |= JBD2_CYCLE_RECORD;  in ext4_init_journal_params()
5787 	write_unlock(&journal->j_state_lock);  in ext4_init_journal_params()
5805 	if (!journal_inode->i_nlink) {  in ext4_get_journal_inode()
5809 		return ERR_PTR(-EFSCORRUPTED);  in ext4_get_journal_inode()
5811 	if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) {  in ext4_get_journal_inode()
5814 		return ERR_PTR(-EFSCORRUPTED);  in ext4_get_journal_inode()
5818 		  journal_inode, journal_inode->i_size);  in ext4_get_journal_inode()
5827 	if (journal->j_inode == NULL)  in ext4_journal_bmap()
5832 	ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0);  in ext4_journal_bmap()
5834 		ext4_msg(journal->j_inode->i_sb, KERN_CRIT,  in ext4_journal_bmap()
5837 		jbd2_journal_abort(journal, ret ? ret : -EIO);  in ext4_journal_bmap()
5860 	journal->j_private = sb;  in ext4_open_inode_journal()
5861 	journal->j_bmap = ext4_journal_bmap;  in ext4_open_inode_journal()
5875 	struct ext4_super_block *es;  in ext4_get_journal_blkdev()  local
5879 	up_write(&sb->s_umount);  in ext4_get_journal_blkdev()
5882 	down_write(&sb->s_umount);  in ext4_get_journal_blkdev()
5885 			 "failed to open journal device unknown-block(%u,%u) %ld",  in ext4_get_journal_blkdev()
5890 	blocksize = sb->s_blocksize;  in ext4_get_journal_blkdev()
5895 		errno = -EINVAL;  in ext4_get_journal_blkdev()
5906 		errno = -EINVAL;  in ext4_get_journal_blkdev()
5910 	es = (struct ext4_super_block *) (bh->b_data + offset);  in ext4_get_journal_blkdev()
5911 	if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) ||  in ext4_get_journal_blkdev()
5912 	    !(le32_to_cpu(es->s_feature_incompat) &  in ext4_get_journal_blkdev()
5915 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5919 	if ((le32_to_cpu(es->s_feature_ro_compat) &  in ext4_get_journal_blkdev()
5921 	    es->s_checksum != ext4_superblock_csum(sb, es)) {  in ext4_get_journal_blkdev()
5923 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5927 	if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {  in ext4_get_journal_blkdev()
5929 		errno = -EFSCORRUPTED;  in ext4_get_journal_blkdev()
5934 	*j_len = ext4_blocks_count(es);  in ext4_get_journal_blkdev()
5958 	journal = jbd2_journal_init_dev(journal_bdev, sb->s_bdev, j_start,  in ext4_open_dev_journal()
5959 					j_len, sb->s_blocksize);  in ext4_open_dev_journal()
5965 	if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {  in ext4_open_dev_journal()
5967 					"user (unsupported) - %d",  in ext4_open_dev_journal()
5968 			be32_to_cpu(journal->j_superblock->s_nr_users));  in ext4_open_dev_journal()
5969 		errno = -EINVAL;  in ext4_open_dev_journal()
5972 	journal->j_private = sb;  in ext4_open_dev_journal()
5973 	EXT4_SB(sb)->s_journal_bdev = journal_bdev;  in ext4_open_dev_journal()
5985 			     struct ext4_super_block *es,  in ext4_load_journal()  argument
5989 	unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);  in ext4_load_journal()
5996 		return -EFSCORRUPTED;  in ext4_load_journal()
5999 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {  in ext4_load_journal()
6004 		journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));  in ext4_load_journal()
6009 		return -EINVAL;  in ext4_load_journal()
6022 	journal_dev_ro = bdev_read_only(journal->j_dev);  in ext4_load_journal()
6023 	really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro;  in ext4_load_journal()
6027 			 "journal device read-only, try mounting with '-o ro'");  in ext4_load_journal()
6028 		err = -EROFS;  in ext4_load_journal()
6035 	 * can get read-write access to the device.  in ext4_load_journal()
6045 				err = -EROFS;  in ext4_load_journal()
6053 	if (!(journal->j_flags & JBD2_BARRIER))  in ext4_load_journal()
6064 			memcpy(save, ((char *) es) +  in ext4_load_journal()
6067 		if (save && memcmp(((char *) es) + EXT4_S_ERR_START,  in ext4_load_journal()
6069 			memcpy(((char *) es) + EXT4_S_ERR_START,  in ext4_load_journal()
6074 		orig_state = es->s_state;  in ext4_load_journal()
6075 		es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state &  in ext4_load_journal()
6077 		if (orig_state != es->s_state)  in ext4_load_journal()
6092 	EXT4_SB(sb)->s_journal = journal;  in ext4_load_journal()
6093 	err = ext4_clear_journal_err(sb, es);  in ext4_load_journal()
6095 		EXT4_SB(sb)->s_journal = NULL;  in ext4_load_journal()
6101 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {  in ext4_load_journal()
6102 		es->s_journal_dev = cpu_to_le32(journal_devnum);  in ext4_load_journal()
6106 	    journal_inum != le32_to_cpu(es->s_journal_inum)) {  in ext4_load_journal()
6107 		es->s_journal_inum = cpu_to_le32(journal_inum);  in ext4_load_journal()
6118 /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */
6122 	struct ext4_super_block *es = sbi->s_es;  in ext4_update_super()  local
6123 	struct buffer_head *sbh = sbi->s_sbh;  in ext4_update_super()
6127 	 * If the file system is mounted read-only, don't update the  in ext4_update_super()
6132 	 * tick in localtime for Windows bug-for-bug compatibility,  in ext4_update_super()
6137 		ext4_update_tstamp(es, s_wtime);  in ext4_update_super()
6138 	es->s_kbytes_written =  in ext4_update_super()
6139 		cpu_to_le64(sbi->s_kbytes_written +  in ext4_update_super()
6140 		    ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -  in ext4_update_super()
6141 		      sbi->s_sectors_written_start) >> 1));  in ext4_update_super()
6142 	if (percpu_counter_initialized(&sbi->s_freeclusters_counter))  in ext4_update_super()
6143 		ext4_free_blocks_count_set(es,  in ext4_update_super()
6145 				&sbi->s_freeclusters_counter)));  in ext4_update_super()
6146 	if (percpu_counter_initialized(&sbi->s_freeinodes_counter))  in ext4_update_super()
6147 		es->s_free_inodes_count =  in ext4_update_super()
6149 				&sbi->s_freeinodes_counter));  in ext4_update_super()
6150 	/* Copy error information to the on-disk superblock */  in ext4_update_super()
6151 	spin_lock(&sbi->s_error_lock);  in ext4_update_super()
6152 	if (sbi->s_add_error_count > 0) {  in ext4_update_super()
6153 		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);  in ext4_update_super()
6154 		if (!es->s_first_error_time && !es->s_first_error_time_hi) {  in ext4_update_super()
6155 			__ext4_update_tstamp(&es->s_first_error_time,  in ext4_update_super()
6156 					     &es->s_first_error_time_hi,  in ext4_update_super()
6157 					     sbi->s_first_error_time);  in ext4_update_super()
6158 			strncpy(es->s_first_error_func, sbi->s_first_error_func,  in ext4_update_super()
6159 				sizeof(es->s_first_error_func));  in ext4_update_super()
6160 			es->s_first_error_line =  in ext4_update_super()
6161 				cpu_to_le32(sbi->s_first_error_line);  in ext4_update_super()
6162 			es->s_first_error_ino =  in ext4_update_super()
6163 				cpu_to_le32(sbi->s_first_error_ino);  in ext4_update_super()
6164 			es->s_first_error_block =  in ext4_update_super()
6165 				cpu_to_le64(sbi->s_first_error_block);  in ext4_update_super()
6166 			es->s_first_error_errcode =  in ext4_update_super()
6167 				ext4_errno_to_code(sbi->s_first_error_code);  in ext4_update_super()
6169 		__ext4_update_tstamp(&es->s_last_error_time,  in ext4_update_super()
6170 				     &es->s_last_error_time_hi,  in ext4_update_super()
6171 				     sbi->s_last_error_time);  in ext4_update_super()
6172 		strncpy(es->s_last_error_func, sbi->s_last_error_func,  in ext4_update_super()
6173 			sizeof(es->s_last_error_func));  in ext4_update_super()
6174 		es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line);  in ext4_update_super()
6175 		es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino);  in ext4_update_super()
6176 		es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block);  in ext4_update_super()
6177 		es->s_last_error_errcode =  in ext4_update_super()
6178 				ext4_errno_to_code(sbi->s_last_error_code);  in ext4_update_super()
6183 		if (!es->s_error_count)  in ext4_update_super()
6184 			mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);  in ext4_update_super()
6185 		le32_add_cpu(&es->s_error_count, sbi->s_add_error_count);  in ext4_update_super()
6186 		sbi->s_add_error_count = 0;  in ext4_update_super()
6188 	spin_unlock(&sbi->s_error_lock);  in ext4_update_super()
6196 	struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;  in ext4_commit_super()
6199 		return -EINVAL;  in ext4_commit_super()
6201 		return -ENODEV;  in ext4_commit_super()
6209 		return -EIO;  in ext4_commit_super()
6229 	sbh->b_end_io = end_buffer_write_sync;  in ext4_commit_super()
6238 		return -EIO;  in ext4_commit_super()
6249 				       struct ext4_super_block *es)  in ext4_mark_recovery_complete()  argument
6252 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_mark_recovery_complete()
6258 			return -EFSCORRUPTED;  in ext4_mark_recovery_complete()
6270 			ext4_error(sb, "Orphan file not empty on read-only fs.");  in ext4_mark_recovery_complete()
6271 			err = -EFSCORRUPTED;  in ext4_mark_recovery_complete()
6284  * If we are mounting (or read-write remounting) a filesystem whose journal
6289 				   struct ext4_super_block *es)  in ext4_clear_journal_err()  argument
6297 		return -EFSCORRUPTED;  in ext4_clear_journal_err()
6300 	journal = EXT4_SB(sb)->s_journal;  in ext4_clear_journal_err()
6315 		EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;  in ext4_clear_journal_err()
6316 		es->s_state |= cpu_to_le16(EXT4_ERROR_FS);  in ext4_clear_journal_err()
6334 	return ext4_journal_force_commit(EXT4_SB(sb)->s_journal);  in ext4_force_commit()
6348 	flush_workqueue(sbi->rsv_conversion_wq);  in ext4_sync_fs()
6350 	 * Writeback quota in non-journalled quota case - journalled quota has  in ext4_sync_fs()
6353 	dquot_writeback_dquots(sb, -1);  in ext4_sync_fs()
6359 	if (sbi->s_journal) {  in ext4_sync_fs()
6360 		target = jbd2_get_latest_transaction(sbi->s_journal);  in ext4_sync_fs()
6361 		if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&  in ext4_sync_fs()
6362 		    !jbd2_trans_will_send_data_barrier(sbi->s_journal, target))  in ext4_sync_fs()
6365 		if (jbd2_journal_start_commit(sbi->s_journal, &target)) {  in ext4_sync_fs()
6367 				ret = jbd2_log_wait_commit(sbi->s_journal,  in ext4_sync_fs()
6374 		err = blkdev_issue_flush(sb->s_bdev);  in ext4_sync_fs()
6383  * LVM calls this function before a (read-only) snapshot is created.  This
6393 	journal_t *journal = EXT4_SB(sb)->s_journal;  in ext4_freeze()
6430 	if (EXT4_SB(sb)->s_journal) {  in ext4_unfreeze()
6459 	struct ext4_fs_context *ctx = fc->fs_private;  in __ext4_remount()
6460 	struct ext4_super_block *es;  in __ext4_remount()  local
6475 	old_sb_flags = sb->s_flags;  in __ext4_remount()
6476 	old_opts.s_mount_opt = sbi->s_mount_opt;  in __ext4_remount()
6477 	old_opts.s_mount_opt2 = sbi->s_mount_opt2;  in __ext4_remount()
6478 	old_opts.s_resuid = sbi->s_resuid;  in __ext4_remount()
6479 	old_opts.s_resgid = sbi->s_resgid;  in __ext4_remount()
6480 	old_opts.s_commit_interval = sbi->s_commit_interval;  in __ext4_remount()
6481 	old_opts.s_min_batch_time = sbi->s_min_batch_time;  in __ext4_remount()
6482 	old_opts.s_max_batch_time = sbi->s_max_batch_time;  in __ext4_remount()
6484 	old_opts.s_jquota_fmt = sbi->s_jquota_fmt;  in __ext4_remount()
6486 		if (sbi->s_qf_names[i]) {  in __ext4_remount()
6493 				return -ENOMEM;  in __ext4_remount()
6498 	if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) {  in __ext4_remount()
6499 		if (sbi->s_journal && sbi->s_journal->j_task->io_context)  in __ext4_remount()
6500 			ctx->journal_ioprio =  in __ext4_remount()
6501 				sbi->s_journal->j_task->io_context->ioprio;  in __ext4_remount()
6503 			ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;  in __ext4_remount()
6507 	if ((ctx->spec & EXT4_SPEC_s_stripe) &&  in __ext4_remount()
6508 	    ext4_is_stripe_incompatible(sb, ctx->s_stripe)) {  in __ext4_remount()
6512 			 ctx->s_stripe, sbi->s_cluster_ratio);  in __ext4_remount()
6513 		ctx->s_stripe = 0;  in __ext4_remount()
6531 		sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM;  in __ext4_remount()
6538 			err = -EINVAL;  in __ext4_remount()
6544 			err = -EINVAL;  in __ext4_remount()
6551 			err = -EINVAL;  in __ext4_remount()
6556 	if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) {  in __ext4_remount()
6557 		ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount");  in __ext4_remount()
6558 		err = -EINVAL;  in __ext4_remount()
6562 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |  in __ext4_remount()
6565 	es = sbi->s_es;  in __ext4_remount()
6567 	if (sbi->s_journal) {  in __ext4_remount()
6568 		ext4_init_journal_params(sb, sbi->s_journal);  in __ext4_remount()
6569 		set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);  in __ext4_remount()
6573 	flush_work(&sbi->s_sb_upd_work);  in __ext4_remount()
6575 	if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {  in __ext4_remount()
6577 			err = -EROFS;  in __ext4_remount()
6581 		if (fc->sb_flags & SB_RDONLY) {  in __ext4_remount()
6585 			err = dquot_suspend(sb, -1);  in __ext4_remount()
6593 			sb->s_flags |= SB_RDONLY;  in __ext4_remount()
6600 			if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) &&  in __ext4_remount()
6601 			    (sbi->s_mount_state & EXT4_VALID_FS))  in __ext4_remount()
6602 				es->s_state = cpu_to_le16(sbi->s_mount_state);  in __ext4_remount()
6604 			if (sbi->s_journal) {  in __ext4_remount()
6606 				 * We let remount-ro finish even if marking fs  in __ext4_remount()
6609 				ext4_mark_recovery_complete(sb, es);  in __ext4_remount()
6615 				err = -EROFS;  in __ext4_remount()
6622 			for (g = 0; g < sbi->s_groups_count; g++) {  in __ext4_remount()
6630 					       le16_to_cpu(gdp->bg_checksum));  in __ext4_remount()
6631 					err = -EFSBADCRC;  in __ext4_remount()
6641 			if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) {  in __ext4_remount()
6646 				err = -EINVAL;  in __ext4_remount()
6651 			 * Mounting a RDONLY partition read-write, so reread  in __ext4_remount()
6656 			if (sbi->s_journal) {  in __ext4_remount()
6657 				err = ext4_clear_journal_err(sb, es);  in __ext4_remount()
6661 			sbi->s_mount_state = (le16_to_cpu(es->s_state) &  in __ext4_remount()
6664 			err = ext4_setup_super(sb, es, 0);  in __ext4_remount()
6668 			sb->s_flags &= ~SB_RDONLY;  in __ext4_remount()
6671 						le64_to_cpu(es->s_mmp_block));  in __ext4_remount()
6686 	if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) {  in __ext4_remount()
6692 	if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) {  in __ext4_remount()
6701 			dquot_resume(sb, -1);  in __ext4_remount()
6712 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)  in __ext4_remount()
6743 	 * re-enable quota  in __ext4_remount()
6747 		dquot_resume(sb, -1);  in __ext4_remount()
6750 	sb->s_flags = old_sb_flags;  in __ext4_remount()
6751 	sbi->s_mount_opt = old_opts.s_mount_opt;  in __ext4_remount()
6752 	sbi->s_mount_opt2 = old_opts.s_mount_opt2;  in __ext4_remount()
6753 	sbi->s_resuid = old_opts.s_resuid;  in __ext4_remount()
6754 	sbi->s_resgid = old_opts.s_resgid;  in __ext4_remount()
6755 	sbi->s_commit_interval = old_opts.s_commit_interval;  in __ext4_remount()
6756 	sbi->s_min_batch_time = old_opts.s_min_batch_time;  in __ext4_remount()
6757 	sbi->s_max_batch_time = old_opts.s_max_batch_time;  in __ext4_remount()
6760 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)  in __ext4_remount()
6763 	sbi->s_jquota_fmt = old_opts.s_jquota_fmt;  in __ext4_remount()
6766 		rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]);  in __ext4_remount()
6779 	struct super_block *sb = fc->root->d_sb;  in ext4_reconfigure()
6782 	fc->s_fs_info = EXT4_SB(sb);  in ext4_reconfigure()
6792 	ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.",  in ext4_reconfigure()
6793 		 &sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w",  in ext4_reconfigure()
6812 	spin_lock(&dquot->dq_dqb_lock);  in ext4_statfs_project()
6814 	limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,  in ext4_statfs_project()
6815 			     dquot->dq_dqb.dqb_bhardlimit);  in ext4_statfs_project()
6816 	limit >>= sb->s_blocksize_bits;  in ext4_statfs_project()
6818 	if (limit && buf->f_blocks > limit) {  in ext4_statfs_project()
6819 		curblock = (dquot->dq_dqb.dqb_curspace +  in ext4_statfs_project()
6820 			    dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;  in ext4_statfs_project()
6821 		buf->f_blocks = limit;  in ext4_statfs_project()
6822 		buf->f_bfree = buf->f_bavail =  in ext4_statfs_project()
6823 			(buf->f_blocks > curblock) ?  in ext4_statfs_project()
6824 			 (buf->f_blocks - curblock) : 0;  in ext4_statfs_project()
6827 	limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,  in ext4_statfs_project()
6828 			     dquot->dq_dqb.dqb_ihardlimit);  in ext4_statfs_project()
6829 	if (limit && buf->f_files > limit) {  in ext4_statfs_project()
6830 		buf->f_files = limit;  in ext4_statfs_project()
6831 		buf->f_ffree =  in ext4_statfs_project()
6832 			(buf->f_files > dquot->dq_dqb.dqb_curinodes) ?  in ext4_statfs_project()
6833 			 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;  in ext4_statfs_project()
6836 	spin_unlock(&dquot->dq_dqb_lock);  in ext4_statfs_project()
6844 	struct super_block *sb = dentry->d_sb;  in ext4_statfs()
6846 	struct ext4_super_block *es = sbi->s_es;  in ext4_statfs()  local
6849 	resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters));  in ext4_statfs()
6852 		overhead = sbi->s_overhead;  in ext4_statfs()
6854 	buf->f_type = EXT4_SUPER_MAGIC;  in ext4_statfs()
6855 	buf->f_bsize = sb->s_blocksize;  in ext4_statfs()
6856 	buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead);  in ext4_statfs()
6857 	bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) -  in ext4_statfs()
6858 		percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter);  in ext4_statfs()
6860 	buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0));  in ext4_statfs()
6861 	buf->f_bavail = buf->f_bfree -  in ext4_statfs()
6862 			(ext4_r_blocks_count(es) + resv_blocks);  in ext4_statfs()
6863 	if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks))  in ext4_statfs()
6864 		buf->f_bavail = 0;  in ext4_statfs()
6865 	buf->f_files = le32_to_cpu(es->s_inodes_count);  in ext4_statfs()
6866 	buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);  in ext4_statfs()
6867 	buf->f_namelen = EXT4_NAME_LEN;  in ext4_statfs()
6868 	buf->f_fsid = uuid_to_fsid(es->s_uuid);  in ext4_statfs()
6871 	if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) &&  in ext4_statfs()
6873 		ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf);  in ext4_statfs()
6887 	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type];  in dquot_to_inode()
6898 				    EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb));  in ext4_write_dquot()
6903 		ext4_error_err(dquot->dq_sb, -ret,  in ext4_write_dquot()
6905 			       dquot->dq_id.type);  in ext4_write_dquot()
6918 				    EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb));  in ext4_acquire_dquot()
6923 		ext4_error_err(dquot->dq_sb, -ret,  in ext4_acquire_dquot()
6925 			      dquot->dq_id.type);  in ext4_acquire_dquot()
6938 				    EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb));  in ext4_release_dquot()
6946 		ext4_error_err(dquot->dq_sb, -ret,  in ext4_release_dquot()
6948 			       dquot->dq_id.type);  in ext4_release_dquot()
6957 	struct super_block *sb = dquot->dq_sb;  in ext4_mark_dquot_dirty()
6988 	 * *exactly* the same as the argument to init_rwsem() --- in  in lockdep_set_quota_inode()
6989 	 * this case, in init_once() --- or lockdep gets unhappy  in lockdep_set_quota_inode()
6994 	lockdep_set_subclass(&ei->i_data_sem, subclass);  in lockdep_set_quota_inode()
7006 		return -EINVAL;  in ext4_quota_on()
7009 	if (path->dentry->d_sb != sb)  in ext4_quota_on()
7010 		return -EXDEV;  in ext4_quota_on()
7013 	if (IS_NOQUOTA(d_inode(path->dentry)))  in ext4_quota_on()
7014 		return -EBUSY;  in ext4_quota_on()
7017 	if (EXT4_SB(sb)->s_qf_names[type]) {  in ext4_quota_on()
7019 		if (path->dentry->d_parent != sb->s_root)  in ext4_quota_on()
7023 		sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY;  in ext4_quota_on()
7029 		sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY;  in ext4_quota_on()
7032 	lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);  in ext4_quota_on()
7035 		struct inode *inode = d_inode(path->dentry);  in ext4_quota_on()
7047 		EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL;  in ext4_quota_on()
7058 		lockdep_set_quota_inode(path->dentry->d_inode,  in ext4_quota_on()
7083 		le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),  in ext4_quota_enable()
7084 		le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),  in ext4_quota_enable()
7085 		le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)  in ext4_quota_enable()
7091 		return -EPERM;  in ext4_quota_enable()
7096 		return -EUCLEAN;  in ext4_quota_enable()
7107 	qf_inode->i_flags |= S_NOQUOTA;  in ext4_quota_enable()
7117 /* Enable usage tracking for all quota types. */
7122 		le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),  in ext4_enable_quotas()
7123 		le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),  in ext4_enable_quotas()
7124 		le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)  in ext4_enable_quotas()
7132 	sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY;  in ext4_enable_quotas()
7140 					"Failed to enable quota tracking "  in ext4_enable_quotas()
7155 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_off()
7171 	 * When the filesystem was remounted read-only first, we cannot cleanup  in ext4_quota_off()
7189 	EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL);  in ext4_quota_off()
7204 /* Read data from quotafile - avoid pagecache and such because we cannot afford
7211 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_read()
7213 	int offset = off & (sb->s_blocksize - 1);  in ext4_quota_read()
7222 		len = i_size-off;  in ext4_quota_read()
7225 		tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);  in ext4_quota_read()
7232 			memcpy(data, bh->b_data+offset, tocopy);  in ext4_quota_read()
7235 		toread -= tocopy;  in ext4_quota_read()
7247 	struct inode *inode = sb_dqopt(sb)->files[type];  in ext4_quota_write()
7249 	int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1);  in ext4_quota_write()
7258 		return -EIO;  in ext4_quota_write()
7264 	if (sb->s_blocksize - offset < len) {  in ext4_quota_write()
7268 		return -EIO;  in ext4_quota_write()
7275 	} while (PTR_ERR(bh) == -ENOSPC &&  in ext4_quota_write()
7276 		 ext4_should_retry_alloc(inode->i_sb, &retries));  in ext4_quota_write()
7288 	memcpy(bh->b_data+offset, data, len);  in ext4_quota_write()
7289 	flush_dcache_page(bh->b_page);  in ext4_quota_write()
7294 	if (inode->i_size < off + len) {  in ext4_quota_write()
7296 		EXT4_I(inode)->i_disksize = inode->i_size;  in ext4_quota_write()
7311 		       "EXT4-fs: Unable to register as ext2 (%d)\n", err);  in register_as_ext2()
7340 		       "EXT4-fs: Unable to register as ext3 (%d)\n", err);  in register_as_ext3()
7364 	struct block_device *journal_bdev = sbi ? sbi->s_journal_bdev : NULL;  in ext4_kill_sb()
7392 	/* Build-time check for flags consistency */  in ext4_init_fs()