diff options
| author | Darrick J. Wong <djwong@us.ibm.com> | 2012-05-27 08:12:12 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-05-27 08:12:12 -0400 |
| commit | c390087591dcbecd244c31d979ccdad49ae83364 (patch) | |
| tree | c3ccbd028cb7970070114a8b0f45adfbebb113cb /fs/jbd2/journal.c | |
| parent | 1f56c5890e3e815c6f4eabfc87a8a81f439b6f3d (diff) | |
| download | linux-c390087591dcbecd244c31d979ccdad49ae83364.tar.gz | |
jbd2: checksum data blocks that are stored in the journal
Calculate and verify checksums of each data block being stored in the journal. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/journal.c')
| -rw-r--r-- | fs/jbd2/journal.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 9072f03d30b5..e9a3c4c85594 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2097,10 +2097,16 @@ int jbd2_journal_blocks_per_page(struct inode *inode) */ size_t journal_tag_bytes(journal_t *journal) { + journal_block_tag_t tag; + size_t x = 0; + + if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2)) + x += sizeof(tag.t_checksum); + if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_64BIT)) - return JBD2_TAG_SIZE64; + return x + JBD2_TAG_SIZE64; else - return JBD2_TAG_SIZE32; + return x + JBD2_TAG_SIZE32; } /* |