ocfs2: Provide a wrapper to brelse() xattr bucket buffers.

A common theme is walking all the buffer heads on an ocfs2_xattr_bucket
and releasing them.  Let's wrap that.

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

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 1b77302..3478ad1 100644 (file)
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -157,6 +157,17 @@ static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
 #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
 #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
 
+static void ocfs2_xattr_bucket_relse(struct inode *inode,
+                                    struct ocfs2_xattr_bucket *bucket)
+{
+       int i, blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
+
+       for (i = 0; i < blks; i++) {
+               brelse(bucket->bu_bhs[i]);
+               bucket->bu_bhs[i] = NULL;
+       }
+}
+
 static inline const char *ocfs2_xattr_prefix(int name_index)
 {
        struct xattr_handler *handler = NULL;
@@ -820,8 +831,7 @@ static int ocfs2_xattr_block_get(struct inode *inode,
        }
        ret = size;
 cleanup:
-       for (i = 0; i < OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET; i++)
-               brelse(xs->bucket.bu_bhs[i]);
+       ocfs2_xattr_bucket_relse(inode, &xs->bucket);
        memset(&xs->bucket, 0, sizeof(xs->bucket));
 
        brelse(xs->xattr_bh);
@@ -1932,7 +1942,6 @@ int ocfs2_xattr_set(struct inode *inode,
        struct buffer_head *di_bh = NULL;
        struct ocfs2_dinode *di;
        int ret;
-       u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
 
        struct ocfs2_xattr_info xi = {
                .name_index = name_index,
@@ -2034,8 +2043,7 @@ cleanup:
        ocfs2_inode_unlock(inode, 1);
        brelse(di_bh);
        brelse(xbs.xattr_bh);
-       for (i = 0; i < blk_per_bucket; i++)
-               brelse(xbs.bucket.bu_bhs[i]);
+       ocfs2_xattr_bucket_relse(inode, &xbs.bucket);
 
        return ret;
 }
@@ -2358,7 +2366,7 @@ static int ocfs2_iterate_xattr_buckets(struct inode *inode,
                                       xattr_bucket_func *func,
                                       void *para)
 {
-       int i, j, ret = 0;
+       int i, ret = 0;
        int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
        u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
        u32 num_buckets = clusters * bpc;
@@ -2395,14 +2403,12 @@ static int ocfs2_iterate_xattr_buckets(struct inode *inode,
                        }
                }
 
-               for (j = 0; j < blk_per_bucket; j++)
-                       brelse(bucket.bu_bhs[j]);
+               ocfs2_xattr_bucket_relse(inode, &bucket);
                memset(&bucket, 0, sizeof(bucket));
        }
 
 out:
-       for (j = 0; j < blk_per_bucket; j++)
-               brelse(bucket.bu_bhs[j]);
+       ocfs2_xattr_bucket_relse(inode, &bucket);
 
        return ret;
 }
@@ -4554,11 +4560,10 @@ static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
        struct ocfs2_xattr_header *xh;
        struct ocfs2_xattr_entry *xe;
        u16 count, header_size, xh_free_start;
-       int i, free, max_free, need, old;
+       int free, max_free, need, old;
        size_t value_size = 0, name_len = strlen(xi->name);
        size_t blocksize = inode->i_sb->s_blocksize;
        int ret, allocation = 0;
-       u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
 
        mlog_entry("Set xattr %s in xattr index block\n", xi->name);
 
@@ -4672,9 +4677,7 @@ try_again:
                        goto out;
                }
 
-               for (i = 0; i < blk_per_bucket; i++)
-                       brelse(xs->bucket.bu_bhs[i]);
-
+               ocfs2_xattr_bucket_relse(inode, &xs->bucket);
                memset(&xs->bucket, 0, sizeof(xs->bucket));
 
                ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,