ocfs2: Add helper function in uptodate.c for removing xattr clusters

The old uptodate only handles the issue of removing one buffer_head from
ocfs2 inode's buffer cache. With xattr clusters, we may need to remove
multiple buffer_head's at a time.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index 4da8851..e26459e 100644 (file)
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -511,14 +511,10 @@ static void ocfs2_remove_metadata_tree(struct ocfs2_caching_info *ci,
        ci->ci_num_cached--;
 }
 
-/* Called when we remove a chunk of metadata from an inode. We don't
- * bother reverting things to an inlined array in the case of a remove
- * which moves us back under the limit. */
-void ocfs2_remove_from_cache(struct inode *inode,
-                            struct buffer_head *bh)
+static void ocfs2_remove_block_from_cache(struct inode *inode,
+                                         sector_t block)
 {
        int index;
-       sector_t block = bh->b_blocknr;
        struct ocfs2_meta_cache_item *item = NULL;
        struct ocfs2_inode_info *oi = OCFS2_I(inode);
        struct ocfs2_caching_info *ci = &oi->ip_metadata_cache;
@@ -544,6 +540,30 @@ void ocfs2_remove_from_cache(struct inode *inode,
                kmem_cache_free(ocfs2_uptodate_cachep, item);
 }
 
+/*
+ * Called when we remove a chunk of metadata from an inode. We don't
+ * bother reverting things to an inlined array in the case of a remove
+ * which moves us back under the limit.
+ */
+void ocfs2_remove_from_cache(struct inode *inode,
+                            struct buffer_head *bh)
+{
+       sector_t block = bh->b_blocknr;
+
+       ocfs2_remove_block_from_cache(inode, block);
+}
+
+/* Called when we remove xattr clusters from an inode. */
+void ocfs2_remove_xattr_clusters_from_cache(struct inode *inode,
+                                           sector_t block,
+                                           u32 c_len)
+{
+       u64 i, b_len = ocfs2_clusters_to_blocks(inode->i_sb, 1) * c_len;
+
+       for (i = 0; i < b_len; i++, block++)
+               ocfs2_remove_block_from_cache(inode, block);
+}
+
 int __init init_ocfs2_uptodate_cache(void)
 {
        ocfs2_uptodate_cachep = kmem_cache_create("ocfs2_uptodate",

diff --git a/fs/ocfs2/uptodate.h b/fs/ocfs2/uptodate.h
index 2e73206..531b4b3 100644 (file)
--- a/fs/ocfs2/uptodate.h
+++ b/fs/ocfs2/uptodate.h
@@ -40,6 +40,9 @@ void ocfs2_set_new_buffer_uptodate(struct inode *inode,
                                   struct buffer_head *bh);
 void ocfs2_remove_from_cache(struct inode *inode,
                             struct buffer_head *bh);
+void ocfs2_remove_xattr_clusters_from_cache(struct inode *inode,
+                                           sector_t block,
+                                           u32 c_len);
 int ocfs2_buffer_read_ahead(struct inode *inode,
                            struct buffer_head *bh);