From feb8c6d3dd0f2cc0e1c3376d099cf298c5f2c2c8 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Thu, 11 Sep 2014 11:38:21 -0400 Subject: [PATCH] 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: TR Reardon Signed-off-by: Darrick J. Wong Signed-off-by: Theodore Ts'o --- fs/ext4/super.c | 11 ++++++----- fs/jbd2/journal.c | 16 ++++++++-------- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 2766b8eba121..fb219b95f8d2 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -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; diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 415041c4c40c..e4dc74713a43 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -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; -- 2.20.1