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authorJoel Becker <joel.becker@oracle.com>2008-12-10 17:58:22 -0800
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:40:34 -0800
commitc175a518b4a1d514483abf61813ce5d855917164 (patch)
treee437a3d1377fab38c1d8ef6289fd9ea3590d09b2 /fs/ocfs2/journal.c
parent87d35a74b15ec703910a63e0667692fb5e267be0 (diff)
ocfs2: Checksum and ECC for directory blocks.
Use the db_check field of ocfs2_dir_block_trailer to crc/ecc the dirblocks. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/journal.c')
-rw-r--r--fs/ocfs2/journal.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 3b54dba0f74..57d7d25a2b9 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -415,6 +415,26 @@ static void ocfs2_dq_commit_trigger(struct jbd2_buffer_trigger_type *triggers,
ocfs2_block_check_compute(data, size, &dqt->dq_check);
}
+/*
+ * Directory blocks also have their own trigger because the
+ * struct ocfs2_block_check offset depends on the blocksize.
+ */
+static void ocfs2_db_commit_trigger(struct jbd2_buffer_trigger_type *triggers,
+ struct buffer_head *bh,
+ void *data, size_t size)
+{
+ struct ocfs2_dir_block_trailer *trailer =
+ ocfs2_dir_trailer_from_size(size, data);
+
+ /*
+ * We aren't guaranteed to have the superblock here, so we
+ * must unconditionally compute the ecc data.
+ * __ocfs2_journal_access() will only set the triggers if
+ * metaecc is enabled.
+ */
+ ocfs2_block_check_compute(data, size, &trailer->db_check);
+}
+
static void ocfs2_abort_trigger(struct jbd2_buffer_trigger_type *triggers,
struct buffer_head *bh)
{
@@ -454,6 +474,13 @@ static struct ocfs2_triggers gd_triggers = {
.ot_offset = offsetof(struct ocfs2_group_desc, bg_check),
};
+static struct ocfs2_triggers db_triggers = {
+ .ot_triggers = {
+ .t_commit = ocfs2_db_commit_trigger,
+ .t_abort = ocfs2_abort_trigger,
+ },
+};
+
static struct ocfs2_triggers xb_triggers = {
.ot_triggers = {
.t_commit = ocfs2_commit_trigger,
@@ -555,8 +582,8 @@ int ocfs2_journal_access_gd(handle_t *handle, struct inode *inode,
int ocfs2_journal_access_db(handle_t *handle, struct inode *inode,
struct buffer_head *bh, int type)
{
- /* Right now, nothing for dirblocks */
- return __ocfs2_journal_access(handle, inode, bh, NULL, type);
+ return __ocfs2_journal_access(handle, inode, bh, &db_triggers,
+ type);
}
int ocfs2_journal_access_xb(handle_t *handle, struct inode *inode,