summaryrefslogtreecommitdiffstats
path: root/fs/jbd2/journal.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/jbd2/journal.c')
-rw-r--r--fs/jbd2/journal.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 63175f9..f04ab6c 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1438,6 +1438,17 @@ static int journal_get_superblock(journal_t *journal)
goto out;
}
+ /* Load the checksum driver */
+ if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2)) {
+ journal->j_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
+ if (IS_ERR(journal->j_chksum_driver)) {
+ printk(KERN_ERR "JBD: Cannot load crc32c driver.\n");
+ err = PTR_ERR(journal->j_chksum_driver);
+ journal->j_chksum_driver = NULL;
+ goto out;
+ }
+ }
+
set_buffer_verified(bh);
return 0;
@@ -1591,6 +1602,8 @@ int jbd2_journal_destroy(journal_t *journal)
iput(journal->j_inode);
if (journal->j_revoke)
jbd2_journal_destroy_revoke(journal);
+ if (journal->j_chksum_driver)
+ crypto_free_shash(journal->j_chksum_driver);
kfree(journal->j_wbuf);
kfree(journal);
@@ -1707,6 +1720,18 @@ int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
sb->s_checksum_type = JBD2_CRC32C_CHKSUM;
sb->s_feature_compat &=
~cpu_to_be32(JBD2_FEATURE_COMPAT_CHECKSUM);
+
+ /* Load the checksum driver */
+ if (journal->j_chksum_driver == NULL) {
+ journal->j_chksum_driver = crypto_alloc_shash("crc32c",
+ 0, 0);
+ if (IS_ERR(journal->j_chksum_driver)) {
+ printk(KERN_ERR "JBD: Cannot load crc32c "
+ "driver.\n");
+ journal->j_chksum_driver = NULL;
+ return 0;
+ }
+ }
}
/* If enabling v1 checksums, downgrade superblock */
OpenPOWER on IntegriCloud