vserver 1.9.5.x5

[linux-2.6.git] / fs / ntfs / lcnalloc.h

diff --git a/fs/ntfs/lcnalloc.h b/fs/ntfs/lcnalloc.h
index f9292e8..4cac1c0 100644 (file)
--- a/fs/ntfs/lcnalloc.h
+++ b/fs/ntfs/lcnalloc.h
@@ -28,6 +28,7 @@
 #include <linux/fs.h>
 
 #include "types.h"
+#include "runlist.h"
 #include "volume.h"
 
 typedef enum {
@@ -78,6 +79,34 @@ static inline s64 ntfs_cluster_free(struct inode *vi, const VCN start_vcn,
        return __ntfs_cluster_free(vi, start_vcn, count, FALSE);
 }
 
+extern int ntfs_cluster_free_from_rl_nolock(ntfs_volume *vol,
+               const runlist_element *rl);
+
+/**
+ * ntfs_cluster_free_from_rl - free clusters from runlist
+ * @vol:       mounted ntfs volume on which to free the clusters
+ * @rl:                runlist describing the clusters to free
+ *
+ * Free all the clusters described by the runlist @rl on the volume @vol.  In
+ * the case of an error being returned, at least some of the clusters were not
+ * freed.
+ *
+ * Return 0 on success and -errno on error.
+ *
+ * Locking: This function takes the volume lcn bitmap lock for writing and
+ *         modifies the bitmap contents.
+ */
+static inline int ntfs_cluster_free_from_rl(ntfs_volume *vol,
+               const runlist_element *rl)
+{
+       int ret;
+
+       down_write(&vol->lcnbmp_lock);
+       ret = ntfs_cluster_free_from_rl_nolock(vol, rl);
+       up_write(&vol->lcnbmp_lock);
+       return ret;
+}
+
 #endif /* NTFS_RW */
 
 #endif /* defined _LINUX_NTFS_LCNALLOC_H */