ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

The per-metadata-type ocfs2_journal_access_*() functions hook up jbd2
commit triggers and allow us to compute metadata ecc right before the
buffers are written out.  This commit provides ecc for inodes, extent
blocks, group descriptors, and quota blocks.  It is not safe to use
extened attributes and metaecc at the same time yet.

The ocfs2_extent_tree and ocfs2_path abstractions in alloc.c both hide
the type of block at their root.  Before, it didn't matter, but now the
root block must use the appropriate ocfs2_journal_access_*() function.
To keep this abstract, the structures now have a pointer to the matching
journal_access function and a wrapper call to call it.

A few places use naked ocfs2_write_block() calls instead of adding the
blocks to the journal.  We make sure to calculate their checksum and ecc
before the write.

Since we pass around the journal_access functions.  Let's typedef them
in ocfs2.h.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 31 insertions, 27 deletions

diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index 78755766c329..a69628603e18 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -261,7 +261,11 @@ int ocfs2_check_group_descriptor(struct super_block *sb,
          * local to this block.
          */
         rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check);
-        if (!rc)
+        if (rc) {
+                mlog(ML_ERROR,
+                     "Checksum failed for group descriptor %llu\n",
+                     (unsigned long long)bh->b_blocknr);
+        } else
                 rc = ocfs2_validate_gd_self(sb, bh, 1);
         if (!rc)
                 rc = ocfs2_validate_gd_parent(sb, di, bh, 1);
@@ -343,10 +347,10 @@ static int ocfs2_block_group_fill(handle_t *handle,
                 goto bail;
         }
 
-        status = ocfs2_journal_access(handle,
-                                      alloc_inode,
-                                      bg_bh,
-                                      OCFS2_JOURNAL_ACCESS_CREATE);
+        status = ocfs2_journal_access_gd(handle,
+                                         alloc_inode,
+                                         bg_bh,
+                                         OCFS2_JOURNAL_ACCESS_CREATE);
         if (status < 0) {
                 mlog_errno(status);
                 goto bail;
@@ -476,8 +480,8 @@ static int ocfs2_block_group_alloc(struct ocfs2_super *osb,
 
         bg = (struct ocfs2_group_desc *) bg_bh->b_data;
 
-        status = ocfs2_journal_access(handle, alloc_inode,
-                                      bh, OCFS2_JOURNAL_ACCESS_WRITE);
+        status = ocfs2_journal_access_di(handle, alloc_inode,
+                                         bh, OCFS2_JOURNAL_ACCESS_WRITE);
         if (status < 0) {
                 mlog_errno(status);
                 goto bail;
@@ -986,10 +990,10 @@ static inline int ocfs2_block_group_set_bits(handle_t *handle,
         if (ocfs2_is_cluster_bitmap(alloc_inode))
                 journal_type = OCFS2_JOURNAL_ACCESS_UNDO;
 
-        status = ocfs2_journal_access(handle,
-                                      alloc_inode,
-                                      group_bh,
-                                      journal_type);
+        status = ocfs2_journal_access_gd(handle,
+                                         alloc_inode,
+                                         group_bh,
+                                         journal_type);
         if (status < 0) {
                 mlog_errno(status);
                 goto bail;
@@ -1060,8 +1064,8 @@ static int ocfs2_relink_block_group(handle_t *handle,
         bg_ptr = le64_to_cpu(bg->bg_next_group);
         prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group);
 
-        status = ocfs2_journal_access(handle, alloc_inode, prev_bg_bh,
-                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        status = ocfs2_journal_access_gd(handle, alloc_inode, prev_bg_bh,
+                                         OCFS2_JOURNAL_ACCESS_WRITE);
         if (status < 0) {
                 mlog_errno(status);
                 goto out_rollback;
@@ -1075,8 +1079,8 @@ static int ocfs2_relink_block_group(handle_t *handle,
                 goto out_rollback;
         }
 
-        status = ocfs2_journal_access(handle, alloc_inode, bg_bh,
-                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        status = ocfs2_journal_access_gd(handle, alloc_inode, bg_bh,
+                                         OCFS2_JOURNAL_ACCESS_WRITE);
         if (status < 0) {
                 mlog_errno(status);
                 goto out_rollback;
@@ -1090,8 +1094,8 @@ static int ocfs2_relink_block_group(handle_t *handle,
                 goto out_rollback;
         }
 
-        status = ocfs2_journal_access(handle, alloc_inode, fe_bh,
-                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        status = ocfs2_journal_access_di(handle, alloc_inode, fe_bh,
+                                         OCFS2_JOURNAL_ACCESS_WRITE);
         if (status < 0) {
                 mlog_errno(status);
                 goto out_rollback;
@@ -1242,8 +1246,8 @@ static int ocfs2_alloc_dinode_update_counts(struct inode *inode,
         struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
         struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain;
 
-        ret = ocfs2_journal_access(handle, inode, di_bh,
-                                   OCFS2_JOURNAL_ACCESS_WRITE);
+        ret = ocfs2_journal_access_di(handle, inode, di_bh,
+                                      OCFS2_JOURNAL_ACCESS_WRITE);
         if (ret < 0) {
                 mlog_errno(ret);
                 goto out;
@@ -1414,10 +1418,10 @@ static int ocfs2_search_chain(struct ocfs2_alloc_context *ac,
 
         /* Ok, claim our bits now: set the info on dinode, chainlist
          * and then the group */
-        status = ocfs2_journal_access(handle,
-                                      alloc_inode,
-                                      ac->ac_bh,
-                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        status = ocfs2_journal_access_di(handle,
+                                         alloc_inode,
+                                         ac->ac_bh,
+                                         OCFS2_JOURNAL_ACCESS_WRITE);
         if (status < 0) {
                 mlog_errno(status);
                 goto bail;
@@ -1824,8 +1828,8 @@ static inline int ocfs2_block_group_clear_bits(handle_t *handle,
         if (ocfs2_is_cluster_bitmap(alloc_inode))
                 journal_type = OCFS2_JOURNAL_ACCESS_UNDO;
 
-        status = ocfs2_journal_access(handle, alloc_inode, group_bh,
-                                      journal_type);
+        status = ocfs2_journal_access_gd(handle, alloc_inode, group_bh,
+                                         journal_type);
         if (status < 0) {
                 mlog_errno(status);
                 goto bail;
@@ -1900,8 +1904,8 @@ int ocfs2_free_suballoc_bits(handle_t *handle,
                 goto bail;
         }
 
-        status = ocfs2_journal_access(handle, alloc_inode, alloc_bh,
-                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        status = ocfs2_journal_access_di(handle, alloc_inode, alloc_bh,
+                                         OCFS2_JOURNAL_ACCESS_WRITE);
         if (status < 0) {
                 mlog_errno(status);
                 goto bail;