Use the db_check field of ocfs2_dir_block_trailer to crc/ecc the
dirblocks.
Signed-off-by: Joel Becker <[EMAIL PROTECTED]>
---
fs/ocfs2/dir.c | 33 +++++++++++++++++++++++++++++++--
fs/ocfs2/dir.h | 2 ++
fs/ocfs2/journal.c | 31 +++++++++++++++++++++++++++++--
fs/ocfs2/ocfs2_fs.h | 2 +-
4 files changed, 63 insertions(+), 5 deletions(-)
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 06077d0..e03c4ed 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -48,6 +48,7 @@
#include "ocfs2.h"
#include "alloc.h"
+#include "blockcheck.h"
#include "dir.h"
#include "dlmglue.h"
#include "extent_map.h"
@@ -104,6 +105,17 @@ static inline unsigned int
ocfs2_dir_trailer_blk_off(struct super_block *sb)
#define ocfs2_trailer_from_bh(_bh, _sb) ((struct ocfs2_dir_block_trailer *)
((_bh)->b_data + ocfs2_dir_trailer_blk_off((_sb))))
+/* XXX ocfs2_block_dqtrailer() is similar but not quite - can we make
+ * them more consistent? */
+struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
+ void *data)
+{
+ char *p = data;
+
+ p += blocksize - sizeof(struct ocfs2_dir_block_trailer);
+ return (struct ocfs2_dir_block_trailer *)p;
+}
+
/*
* XXX: This is executed once on every dirent. We should consider optimizing
* it.
@@ -263,14 +275,31 @@ out:
static int ocfs2_validate_dir_block(struct super_block *sb,
struct buffer_head *bh)
{
+ int rc;
+ struct ocfs2_dir_block_trailer *trailer =
+ ocfs2_trailer_from_bh(bh, sb);
+
+
/*
- * Nothing yet. We don't validate dirents here, that's handled
+ * We don't validate dirents here, that's handled
* in-place when the code walks them.
*/
mlog(0, "Validating dirblock %llu\n",
(unsigned long long)bh->b_blocknr);
- return 0;
+ BUG_ON(!buffer_uptodate(bh));
+
+ /*
+ * If the ecc fails, we return the error but otherwise
+ * leave the filesystem running. We know any error is
+ * local to this block.
+ */
+ rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &trailer->db_check);
+ if (rc)
+ mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
+ (unsigned long long)bh->b_blocknr);
+
+ return rc;
}
/*
diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h
index ce48b90..c511e2e 100644
--- a/fs/ocfs2/dir.h
+++ b/fs/ocfs2/dir.h
@@ -83,4 +83,6 @@ int ocfs2_fill_new_dir(struct ocfs2_super *osb,
struct buffer_head *fe_bh,
struct ocfs2_alloc_context *data_ac);
+struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
+ void *data);
#endif /* OCFS2_DIR_H */
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 3b54dba..57d7d25 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,
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index e6e7cb0..1d92806 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -767,7 +767,7 @@ struct ocfs2_dir_block_trailer {
__u8 db_signature[8]; /* Signature for verification */
__le64 db_reserved2;
__le64 db_free_next; /* Next block in list (unused)
*/
- __le64 db_check; /* Error checking */
+ struct ocfs2_block_check db_check; /* Error checking */
};
/*
--
1.5.6.5
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