ocfs2: Make ocfs2_extent_tree the first-class representation of a tree.
We now have three different kinds of extent trees in ocfs2: inode data
(dinode), extended attributes (xattr_tree), and extended attribute
values (xattr_value). There is a nice abstraction for them,
ocfs2_extent_tree, but it is hidden in alloc.c. All the calling
functions have to pick amongst a varied API and pass in type bits and
often extraneous pointers.
A better way is to make ocfs2_extent_tree a first-class object.
Everyone converts their object to an ocfs2_extent_tree() via the
ocfs2_get_*_extent_tree() calls, then uses the ocfs2_extent_tree for all
tree calls to alloc.c.
This simplifies a lot of callers, making for readability. It also
provides an easy way to add additional extent tree types, as they only
need to be defined in alloc.c with a ocfs2_get_<new>_extent_tree()
function.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 5426a02..2cdc553 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -1192,6 +1192,9 @@
struct buffer_head *dirdata_bh = NULL;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
handle_t *handle;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_get_dinode_extent_tree(&et, dir, di_bh);
alloc = ocfs2_clusters_for_bytes(sb, bytes);
@@ -1305,8 +1308,8 @@
* This should never fail as our extent list is empty and all
* related blocks have been journaled already.
*/
- ret = ocfs2_dinode_insert_extent(osb, handle, dir, di_bh, 0, blkno,
- len, 0, NULL);
+ ret = ocfs2_insert_extent(osb, handle, dir, &et, 0, blkno, len,
+ 0, NULL);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -1337,8 +1340,8 @@
}
blkno = ocfs2_clusters_to_blocks(dir->i_sb, bit_off);
- ret = ocfs2_dinode_insert_extent(osb, handle, dir, di_bh, 1,
- blkno, len, 0, NULL);
+ ret = ocfs2_insert_extent(osb, handle, dir, &et, 1,
+ blkno, len, 0, NULL);
if (ret) {
mlog_errno(ret);
goto out_commit;
@@ -1360,6 +1363,7 @@
brelse(dirdata_bh);
+ ocfs2_put_extent_tree(&et);
return ret;
}
@@ -1437,6 +1441,7 @@
struct buffer_head *new_bh = NULL;
struct ocfs2_dir_entry * de;
struct super_block *sb = osb->sb;
+ struct ocfs2_extent_tree et;
mlog_entry_void();
@@ -1480,10 +1485,9 @@
spin_lock(&OCFS2_I(dir)->ip_lock);
if (dir_i_size == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)) {
spin_unlock(&OCFS2_I(dir)->ip_lock);
- num_free_extents = ocfs2_num_free_extents(osb, dir,
- parent_fe_bh,
- OCFS2_DINODE_EXTENT,
- NULL);
+ ocfs2_get_dinode_extent_tree(&et, dir, parent_fe_bh);
+ num_free_extents = ocfs2_num_free_extents(osb, dir, &et);
+ ocfs2_put_extent_tree(&et);
if (num_free_extents < 0) {
status = num_free_extents;
mlog_errno(status);