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Commit feb8c6d3 authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Theodore Ts'o
Browse files

jbd2: fix journal checksum feature flag handling 



Clear all three journal checksum feature flags before turning on
whichever journal checksum options we want.  Rearrange the error
checking so that newer flags get complained about first.

Reported-by: default avatarTR Reardon <thomas_reardon@hotmail.com>
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent c7f72543

fs/ext4/super.c

+6 −5
Original line number Diff line number Diff line
@@ -3237,6 +3237,10 @@ static int set_journal_csum_feature_set(struct super_block *sb) 
		incompat = 0;

	}



	jbd2_journal_clear_features(sbi->s_journal,

			JBD2_FEATURE_COMPAT_CHECKSUM, 0,

			JBD2_FEATURE_INCOMPAT_CSUM_V3 |

			JBD2_FEATURE_INCOMPAT_CSUM_V2);

	if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {

		ret = jbd2_journal_set_features(sbi->s_journal,

				compat, 0,
@@ -3249,11 +3253,8 @@ static int set_journal_csum_feature_set(struct super_block *sb) 
		jbd2_journal_clear_features(sbi->s_journal, 0, 0,

				JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);

	} else {

		jbd2_journal_clear_features(sbi->s_journal,

				JBD2_FEATURE_COMPAT_CHECKSUM, 0,

				JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT |

				JBD2_FEATURE_INCOMPAT_CSUM_V3 |

				JBD2_FEATURE_INCOMPAT_CSUM_V2);

		jbd2_journal_clear_features(sbi->s_journal, 0, 0,

				JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);

	}



	return ret;

fs/jbd2/journal.c

+8 −8
Original line number Diff line number Diff line
@@ -1522,14 +1522,6 @@ static int journal_get_superblock(journal_t *journal) 
		goto out;

	}



	if (jbd2_journal_has_csum_v2or3(journal) &&

	    JBD2_HAS_COMPAT_FEATURE(journal, JBD2_FEATURE_COMPAT_CHECKSUM)) {

		/* Can't have checksum v1 and v2 on at the same time! */

		printk(KERN_ERR "JBD2: Can't enable checksumming v1 and v2 "

		       "at the same time!\n");

		goto out;

	}



	if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2) &&

	    JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V3)) {

		/* Can't have checksum v2 and v3 at the same time! */
@@ -1538,6 +1530,14 @@ static int journal_get_superblock(journal_t *journal) 
		goto out;

	}



	if (jbd2_journal_has_csum_v2or3(journal) &&

	    JBD2_HAS_COMPAT_FEATURE(journal, JBD2_FEATURE_COMPAT_CHECKSUM)) {

		/* Can't have checksum v1 and v2 on at the same time! */

		printk(KERN_ERR "JBD2: Can't enable checksumming v1 and v2/3 "

		       "at the same time!\n");

		goto out;

	}



	if (!jbd2_verify_csum_type(journal, sb)) {

		printk(KERN_ERR "JBD2: Unknown checksum type\n");

		goto out;