ocfs2: Prefix the extent tree operations structure.

[karo-tx-linux.git] / fs / ocfs2 / uptodate.c

diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index b8a00a79332676dd8956a10180926a2b580a7213..e26459e7d554577e502d897e53052e91278a7b83 100644 (file)
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -69,7 +69,7 @@ struct ocfs2_meta_cache_item {
        sector_t        c_block;
 };
 
-static kmem_cache_t *ocfs2_uptodate_cachep = NULL;
+static struct kmem_cache *ocfs2_uptodate_cachep = NULL;
 
 void ocfs2_metadata_cache_init(struct inode *inode)
 {
@@ -206,7 +206,10 @@ static int ocfs2_buffer_cached(struct ocfs2_inode_info *oi,
 }
 
 /* Warning: even if it returns true, this does *not* guarantee that
- * the block is stored in our inode metadata cache. */
+ * the block is stored in our inode metadata cache. 
+ * 
+ * This can be called under lock_buffer()
+ */
 int ocfs2_buffer_uptodate(struct inode *inode,
                          struct buffer_head *bh)
 {
@@ -226,6 +229,16 @@ int ocfs2_buffer_uptodate(struct inode *inode,
        return ocfs2_buffer_cached(OCFS2_I(inode), bh);
 }
 
+/* 
+ * Determine whether a buffer is currently out on a read-ahead request.
+ * ip_io_sem should be held to serialize submitters with the logic here.
+ */
+int ocfs2_buffer_read_ahead(struct inode *inode,
+                           struct buffer_head *bh)
+{
+       return buffer_locked(bh) && ocfs2_buffer_cached(OCFS2_I(inode), bh);
+}
+
 /* Requires ip_lock */
 static void ocfs2_append_cache_array(struct ocfs2_caching_info *ci,
                                     sector_t block)
@@ -403,7 +416,11 @@ out_free:
  *
  * Note that this function may actually fail to insert the block if
  * memory cannot be allocated. This is not fatal however (but may
- * result in a performance penalty) */
+ * result in a performance penalty)
+ *
+ * Readahead buffers can be passed in here before the I/O request is
+ * completed.
+ */
 void ocfs2_set_buffer_uptodate(struct inode *inode,
                               struct buffer_head *bh)
 {
@@ -494,14 +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;
@@ -527,11 +540,35 @@ 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",
                                  sizeof(struct ocfs2_meta_cache_item),
-                                 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+                                 0, SLAB_HWCACHE_ALIGN, NULL);
        if (!ocfs2_uptodate_cachep)
                return -ENOMEM;