From c175a518b4a1d514483abf61813ce5d855917164 Mon Sep 17 00:00:00 2001 From: Joel Becker Date: Wed, 10 Dec 2008 17:58:22 -0800 Subject: 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 Signed-off-by: Mark Fasheh --- fs/ocfs2/journal.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-) (limited to 'fs/ocfs2/journal.c') diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c index 3b54dba0f74b..57d7d25a2b9a 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, -- cgit v1.2.3-70-g09d2