ocfs2: Add statistics for the checksum and ecc operations.

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

diff --git a/fs/ocfs2/blockcheck.h b/fs/ocfs2/blockcheck.h
index 70ec3fe..d4b69fe 100644 (file)
--- a/fs/ocfs2/blockcheck.h
+++ b/fs/ocfs2/blockcheck.h
@@ -21,6 +21,24 @@
 #define OCFS2_BLOCKCHECK_H
 
 
+/* Count errors and error correction from blockcheck.c */
+struct ocfs2_blockcheck_stats {
+       spinlock_t b_lock;
+       u64 b_check_count;      /* Number of blocks we've checked */
+       u64 b_failure_count;    /* Number of failed checksums */
+       u64 b_recover_count;    /* Number of blocks fixed by ecc */
+
+       /*
+        * debugfs entries, used if this is passed to
+        * ocfs2_blockcheck_stats_debugfs_install()
+        */
+       struct dentry *b_debug_dir;     /* Parent of the debugfs  files */
+       struct dentry *b_debug_check;   /* Exposes b_check_count */
+       struct dentry *b_debug_failure; /* Exposes b_failure_count */
+       struct dentry *b_debug_recover; /* Exposes b_recover_count */
+};
+
+
 /* High level block API */
 void ocfs2_compute_meta_ecc(struct super_block *sb, void *data,
                            struct ocfs2_block_check *bc);
@@ -37,11 +55,18 @@ int ocfs2_validate_meta_ecc_bhs(struct super_block *sb,
 void ocfs2_block_check_compute(void *data, size_t blocksize,
                               struct ocfs2_block_check *bc);
 int ocfs2_block_check_validate(void *data, size_t blocksize,
-                              struct ocfs2_block_check *bc);
+                              struct ocfs2_block_check *bc,
+                              struct ocfs2_blockcheck_stats *stats);
 void ocfs2_block_check_compute_bhs(struct buffer_head **bhs, int nr,
                                   struct ocfs2_block_check *bc);
 int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
-                                  struct ocfs2_block_check *bc);
+                                  struct ocfs2_block_check *bc,
+                                  struct ocfs2_blockcheck_stats *stats);
+
+/* Debug Initialization */
+int ocfs2_blockcheck_stats_debugfs_install(struct ocfs2_blockcheck_stats *stats,
+                                          struct dentry *parent);
+void ocfs2_blockcheck_stats_debugfs_remove(struct ocfs2_blockcheck_stats *stats);
 
 /*
  * Hamming code functions