1 files changed, 42 insertions, 0 deletions

diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index cd5496b7a0a3..044013455621 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -781,6 +781,48 @@ bail:
         return status;
 }
 
+int ocfs2_free_local_alloc_bits(struct ocfs2_super *osb,
+                                handle_t *handle,
+                                struct ocfs2_alloc_context *ac,
+                                u32 bit_off,
+                                u32 num_bits)
+{
+        int status, start;
+        u32 clear_bits;
+        struct inode *local_alloc_inode;
+        void *bitmap;
+        struct ocfs2_dinode *alloc;
+        struct ocfs2_local_alloc *la;
+
+        BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL);
+
+        local_alloc_inode = ac->ac_inode;
+        alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
+        la = OCFS2_LOCAL_ALLOC(alloc);
+
+        bitmap = la->la_bitmap;
+        start = bit_off - le32_to_cpu(la->la_bm_off);
+        clear_bits = num_bits;
+
+        status = ocfs2_journal_access_di(handle,
+                        INODE_CACHE(local_alloc_inode),
+                        osb->local_alloc_bh,
+                        OCFS2_JOURNAL_ACCESS_WRITE);
+        if (status < 0) {
+                mlog_errno(status);
+                goto bail;
+        }
+
+        while (clear_bits--)
+                ocfs2_clear_bit(start++, bitmap);
+
+        le32_add_cpu(&alloc->id1.bitmap1.i_used, -num_bits);
+        ocfs2_journal_dirty(handle, osb->local_alloc_bh);
+
+bail:
+        return status;
+}
+
 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
 {
         u32 count;