ocfs2: support for removing file regions

Provide an internal interface for the removal of arbitrary file regions.

ocfs2_remove_inode_range() takes a byte range within a file and will remove
existing extents within that range. Partial clusters will be zeroed so that
any read from within the region will return zeros.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 10 insertions, 10 deletions

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index df186d2e8248..f5e11f4fa952 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -4373,10 +4373,10 @@ out:
         return ret;
 }
 
-static int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh,
-                               u32 cpos, u32 len, handle_t *handle,
-                               struct ocfs2_alloc_context *meta_ac,
-                               struct ocfs2_cached_dealloc_ctxt *dealloc)
+int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh,
+                        u32 cpos, u32 len, handle_t *handle,
+                        struct ocfs2_alloc_context *meta_ac,
+                        struct ocfs2_cached_dealloc_ctxt *dealloc)
 {
         int ret, index;
         u32 rec_range, trunc_range;
@@ -4506,7 +4506,7 @@ out:
         return ret;
 }
 
-static inline int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
+int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
 {
         struct buffer_head *tl_bh = osb->osb_tl_bh;
         struct ocfs2_dinode *di;
@@ -4539,10 +4539,10 @@ static int ocfs2_truncate_log_can_coalesce(struct ocfs2_truncate_log *tl,
         return current_tail == new_start;
 }
 
-static int ocfs2_truncate_log_append(struct ocfs2_super *osb,
-                                     handle_t *handle,
-                                     u64 start_blk,
-                                     unsigned int num_clusters)
+int ocfs2_truncate_log_append(struct ocfs2_super *osb,
+                              handle_t *handle,
+                              u64 start_blk,
+                              unsigned int num_clusters)
 {
         int status, index;
         unsigned int start_cluster, tl_count;
@@ -4698,7 +4698,7 @@ bail:
 }
 
 /* Expects you to already be holding tl_inode->i_mutex */
-static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
+int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
 {
         int status;
         unsigned int num_to_flush;