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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 <thomas_reardon@hotmail.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Darrick J. Wong 2014-09-11 11:38:21 -04:00 коммит произвёл Theodore Ts'o
Родитель c7f725435a
Коммит feb8c6d3dd
2 изменённых файлов: 14 добавлений и 13 удалений
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11
fs/ext4/super.c
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@ -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;

16
fs/jbd2/journal.c
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@ -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;