aboutsummaryrefslogtreecommitdiff
path: root/fs/ocfs2/alloc.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ocfs2/alloc.h')
-rw-r--r--fs/ocfs2/alloc.h27
1 files changed, 26 insertions, 1 deletions
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 0b82e804432..fbcb5934a08 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -31,7 +31,8 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
handle_t *handle,
struct inode *inode,
struct buffer_head *fe_bh,
- u64 blkno,
+ u32 cpos,
+ u64 start_blk,
u32 new_clusters,
struct ocfs2_alloc_context *meta_ac);
int ocfs2_num_free_extents(struct ocfs2_super *osb,
@@ -70,6 +71,8 @@ struct ocfs2_truncate_context {
struct buffer_head *tc_last_eb_bh;
};
+int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
+ u64 new_i_size);
int ocfs2_prepare_truncate(struct ocfs2_super *osb,
struct inode *inode,
struct buffer_head *fe_bh,
@@ -79,4 +82,26 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
struct buffer_head *fe_bh,
struct ocfs2_truncate_context *tc);
+int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el,
+ u32 cpos, struct buffer_head **leaf_bh);
+
+/*
+ * Helper function to look at the # of clusters in an extent record.
+ */
+static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el,
+ struct ocfs2_extent_rec *rec)
+{
+ /*
+ * Cluster count in extent records is slightly different
+ * between interior nodes and leaf nodes. This is to support
+ * unwritten extents which need a flags field in leaf node
+ * records, thus shrinking the available space for a clusters
+ * field.
+ */
+ if (el->l_tree_depth)
+ return le32_to_cpu(rec->e_int_clusters);
+ else
+ return le16_to_cpu(rec->e_leaf_clusters);
+}
+
#endif /* OCFS2_ALLOC_H */