ocfs2/hb: Expose the list of heartbeating nodes via debugfs

[safe/jmp/linux-2.6] / fs / ocfs2 / buffer_head_io.h

diff --git a/fs/ocfs2/buffer_head_io.h b/fs/ocfs2/buffer_head_io.h
index 71646b4..c75d682 100644 (file)
--- a/fs/ocfs2/buffer_head_io.h
+++ b/fs/ocfs2/buffer_head_io.h
@@ -31,33 +31,34 @@
 void ocfs2_end_buffer_io_sync(struct buffer_head *bh,
                             int uptodate);
 
-static inline int ocfs2_read_block(struct ocfs2_super          *osb,
-                                  u64                  off,
-                                  struct buffer_head **bh,
-                                  int                  flags,
-                                  struct inode        *inode);
-
 int ocfs2_write_block(struct ocfs2_super          *osb,
                      struct buffer_head  *bh,
                      struct inode        *inode);
-int ocfs2_read_blocks(struct ocfs2_super          *osb,
-                     u64                  block,
-                     int                  nr,
-                     struct buffer_head  *bhs[],
-                     int                  flags,
-                     struct inode        *inode);
 int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
                           unsigned int nr, struct buffer_head *bhs[]);
 
+/*
+ * If not NULL, validate() will be called on a buffer that is freshly
+ * read from disk.  It will not be called if the buffer was in cache.
+ * Note that if validate() is being used for this buffer, it needs to
+ * be set even for a READAHEAD call, as it marks the buffer for later
+ * validation.
+ */
+int ocfs2_read_blocks(struct inode *inode, u64 block, int nr,
+                     struct buffer_head *bhs[], int flags,
+                     int (*validate)(struct super_block *sb,
+                                     struct buffer_head *bh));
+
 int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
                                struct buffer_head *bh);
 
-#define OCFS2_BH_CACHED            1
+#define OCFS2_BH_IGNORE_CACHE      1
 #define OCFS2_BH_READAHEAD         8
 
-static inline int ocfs2_read_block(struct ocfs2_super * osb, u64 off,
-                                  struct buffer_head **bh, int flags,
-                                  struct inode *inode)
+static inline int ocfs2_read_block(struct inode *inode, u64 off,
+                                  struct buffer_head **bh,
+                                  int (*validate)(struct super_block *sb,
+                                                  struct buffer_head *bh))
 {
        int status = 0;
 
@@ -67,8 +68,7 @@ static inline int ocfs2_read_block(struct ocfs2_super * osb, u64 off,
                goto bail;
        }
 
-       status = ocfs2_read_blocks(osb, off, 1, bh,
-                                  flags, inode);
+       status = ocfs2_read_blocks(inode, off, 1, bh, 0, validate);
 
 bail:
        return status;