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authorJoel Becker <joel.becker@oracle.com>2008-11-26 13:18:31 -0800
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:40:29 -0800
commit54ecb6b6df54bf72befb359b21f3759b2952f9d9 (patch)
tree2b11ad3bbc6f049be5829a72850b3b62d70dbd2c /fs/ocfs2
parent874d65af1c8b8f6456a934701e6828d3017be029 (diff)
downloadop-kernel-dev-54ecb6b6df54bf72befb359b21f3759b2952f9d9.zip
op-kernel-dev-54ecb6b6df54bf72befb359b21f3759b2952f9d9.tar.gz
ocfs2: ocfs2_mv_xattr_buckets() can handle a partial cluster now.
If you look at ocfs2_mv_xattr_bucket_cross_cluster(), you'll notice that two-thirds of the code is almost identical to ocfs2_mv_xattr_buckets(). The only difference is that ocfs2_mv_xattr_buckets() moves a whole cluster's worth, while ocfs2_mv_xattr_bucket_cross_cluster() moves half the cluster. We change ocfs2_mv_xattr_buckets() to allow moving partial clusters. The original caller of ocfs2_mv_xattr_buckets() still moves the whole cluster's worth - it just passes a start_bucket of 0. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/xattr.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index c1f2e06..9734094 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -3995,18 +3995,19 @@ out:
/*
* src_blk points to the start of an existing extent. last_blk points to
* last cluster in that extent. to_blk points to a newly allocated
- * extent. We copy the buckets from cluster at last_blk to the new extent,
- * initializing its xh_num_buckets. The old extent's xh_num_buckets
- * shrinks by the same amount.
+ * extent. We copy the buckets from the cluster at last_blk to the new
+ * extent. If start_bucket is non-zero, we skip that many buckets before
+ * we start copying. The new extent's xh_num_buckets gets set to the
+ * number of buckets we copied. The old extent's xh_num_buckets shrinks
+ * by the same amount.
*/
-static int ocfs2_mv_xattr_buckets(struct inode *inode,
- handle_t *handle,
- u64 src_blk, u64 last_blk,
- u64 to_blk, u32 *first_hash)
+static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
+ u64 src_blk, u64 last_blk, u64 to_blk,
+ unsigned int start_bucket,
+ u32 *first_hash)
{
int i, ret, credits;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
- int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
struct ocfs2_xattr_bucket *old_first, *new_first;
@@ -4014,6 +4015,12 @@ static int ocfs2_mv_xattr_buckets(struct inode *inode,
mlog(0, "mv xattrs from cluster %llu to %llu\n",
(unsigned long long)last_blk, (unsigned long long)to_blk);
+ BUG_ON(start_bucket >= num_buckets);
+ if (start_bucket) {
+ num_buckets -= start_bucket;
+ last_blk += (start_bucket * blks_per_bucket);
+ }
+
/* The first bucket of the original extent */
old_first = ocfs2_xattr_bucket_new(inode);
/* The first bucket of the new extent */
@@ -4031,10 +4038,11 @@ static int ocfs2_mv_xattr_buckets(struct inode *inode,
}
/*
- * We need to update the first bucket of the old extent and the
- * entire first cluster of the new extent.
+ * We need to update the first bucket of the old extent and all
+ * the buckets going to the new extent.
*/
- credits = blks_per_bucket + bpc + handle->h_buffer_credits;
+ credits = ((num_buckets + 1) * blks_per_bucket) +
+ handle->h_buffer_credits;
ret = ocfs2_extend_trans(handle, credits);
if (ret) {
mlog_errno(ret);
@@ -4177,8 +4185,7 @@ static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk)
ret = ocfs2_mv_xattr_buckets(inode, handle,
(*first_bh)->b_blocknr,
- last_blk,
- new_blk,
+ last_blk, new_blk, 0,
v_start);
else {
ret = ocfs2_divide_xattr_cluster(inode, handle,
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