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Commit 327eaf73 authored by Theodore Ts'o's avatar Theodore Ts'o
Browse files

ext4: add warn_on_error mount option 



This is very handy when debugging bugs handling maliciously corrupted
file systems.

Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 4f2f76f7

fs/ext4/ext4.h

+1 −0
Original line number Diff line number Diff line
@@ -1108,6 +1108,7 @@ struct ext4_inode_info { 
#define EXT4_MOUNT_DIOREAD_NOLOCK	0x400000 /* Enable support for dio read nolocking */

#define EXT4_MOUNT_JOURNAL_CHECKSUM	0x800000 /* Journal checksums */

#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT	0x1000000 /* Journal Async Commit */

#define EXT4_MOUNT_WARN_ON_ERROR	0x2000000 /* Trigger WARN_ON on error */

#define EXT4_MOUNT_DELALLOC		0x8000000 /* Delalloc support */

#define EXT4_MOUNT_DATA_ERR_ABORT	0x10000000 /* Abort on file data write */

#define EXT4_MOUNT_BLOCK_VALIDITY	0x20000000 /* Block validity checking */

fs/ext4/super.c

+12 −1
Original line number Diff line number Diff line
@@ -405,6 +405,9 @@ static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 


static void ext4_handle_error(struct super_block *sb)

{

	if (test_opt(sb, WARN_ON_ERROR))

		WARN_ON_ONCE(1);



	if (sb_rdonly(sb))

		return;
@@ -740,6 +743,9 @@ __acquires(bitlock) 
		va_end(args);

	}



	if (test_opt(sb, WARN_ON_ERROR))

		WARN_ON_ONCE(1);



	if (test_opt(sb, ERRORS_CONT)) {

		ext4_commit_super(sb, 0);

		return;
@@ -1377,7 +1383,8 @@ enum { 
	Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,

	Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,

	Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax,

	Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,

	Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error,

	Opt_nowarn_on_error, Opt_mblk_io_submit,

	Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize,

	Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,

	Opt_inode_readahead_blks, Opt_journal_ioprio,
@@ -1444,6 +1451,8 @@ static const match_table_t tokens = { 
	{Opt_dax, "dax"},

	{Opt_stripe, "stripe=%u"},

	{Opt_delalloc, "delalloc"},

	{Opt_warn_on_error, "warn_on_error"},

	{Opt_nowarn_on_error, "nowarn_on_error"},

	{Opt_lazytime, "lazytime"},

	{Opt_nolazytime, "nolazytime"},

	{Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"},
@@ -1608,6 +1617,8 @@ static const struct mount_opts { 
	 MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT},

	{Opt_nodelalloc, EXT4_MOUNT_DELALLOC,

	 MOPT_EXT4_ONLY | MOPT_CLEAR},

	{Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET},

	{Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR},

	{Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM,

	 MOPT_EXT4_ONLY | MOPT_CLEAR},

	{Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM,