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| author | Jan Kara <jack@suse.cz> | 2016-02-23 05:19:09 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-02-23 05:19:09 +0100 |
| commit | 1101cd4d13ba2f42c5da4c1b9081f35a73b5df31 (patch) | |
| tree | c7808f5f15396fba6e5e3e68209bbe4bf4cd073f /fs/jbd2/journal.c | |
| parent | jbd2: factor out common descriptor block initialization (diff) | |
| download | linux-1101cd4d13ba2f42c5da4c1b9081f35a73b5df31.tar.xz linux-1101cd4d13ba2f42c5da4c1b9081f35a73b5df31.zip | |
jbd2: unify revoke and tag block checksum handling
Revoke and tag descriptor blocks are just different kinds of descriptor
blocks and thus have checksum in the same place. Unify computation and
checking of checksums for these.
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/journal.c')
| -rw-r--r-- | fs/jbd2/journal.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 28d05bd9a588..defa962a8e15 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -834,6 +834,21 @@ jbd2_journal_get_descriptor_buffer(transaction_t *transaction, int type) return bh; } +void jbd2_descriptor_block_csum_set(journal_t *j, struct buffer_head *bh) +{ + struct jbd2_journal_block_tail *tail; + __u32 csum; + + if (!jbd2_journal_has_csum_v2or3(j)) + return; + + tail = (struct jbd2_journal_block_tail *)(bh->b_data + j->j_blocksize - + sizeof(struct jbd2_journal_block_tail)); + tail->t_checksum = 0; + csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); + tail->t_checksum = cpu_to_be32(csum); +} + /* * Return tid of the oldest transaction in the journal and block in the journal * where the transaction starts. |