jbd2: convert instrumentation from markers to tracepoints

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2 files changed, 174 insertions, 0 deletions

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index cc02393bfce8..d97eb652d6ca 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1315,6 +1315,12 @@ extern int jbd_blocks_per_page(struct inode *inode);
 #define BUFFER_TRACE2(bh, bh2, info)    do {} while (0)
 #define JBUFFER_TRACE(jh, info) do {} while (0)
 
+/* 
+ * jbd2_dev_to_name is a utility function used by the jbd2 and ext4 
+ * tracing infrastructure to map a dev_t to a device name.
+ */
+extern const char *jbd2_dev_to_name(dev_t device);
+
 #endif  /* __KERNEL__ */
 
 #endif  /* _LINUX_JBD2_H */
diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h
new file mode 100644
index 000000000000..845b0b4b48fd
--- /dev/null
+++ b/include/trace/events/jbd2.h
@@ -0,0 +1,168 @@
+#if !defined(_TRACE_JBD2_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_JBD2_H
+
+#include <linux/jbd2.h>
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM jbd2
+
+TRACE_EVENT(jbd2_checkpoint,
+
+        TP_PROTO(journal_t *journal, int result),
+
+        TP_ARGS(journal, result),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        int,    result                  )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->result         = result;
+        ),
+
+        TP_printk("dev %s result %d",
+                  jbd2_dev_to_name(__entry->dev), __entry->result)
+);
+
+TRACE_EVENT(jbd2_start_commit,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        char,   sync_commit               )
+                __field(        int,    transaction               )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->sync_commit = commit_transaction->t_synchronous_commit;
+                __entry->transaction    = commit_transaction->t_tid;
+        ),
+
+        TP_printk("dev %s transaction %d sync %d",
+                  jbd2_dev_to_name(__entry->dev), __entry->transaction,
+                  __entry->sync_commit)
+);
+
+TRACE_EVENT(jbd2_commit_locking,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        char,   sync_commit               )
+                __field(        int,    transaction               )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->sync_commit = commit_transaction->t_synchronous_commit;
+                __entry->transaction    = commit_transaction->t_tid;
+        ),
+
+        TP_printk("dev %s transaction %d sync %d",
+                  jbd2_dev_to_name(__entry->dev), __entry->transaction,
+                  __entry->sync_commit)
+);
+
+TRACE_EVENT(jbd2_commit_flushing,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        char,   sync_commit               )
+                __field(        int,    transaction               )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->sync_commit = commit_transaction->t_synchronous_commit;
+                __entry->transaction    = commit_transaction->t_tid;
+        ),
+
+        TP_printk("dev %s transaction %d sync %d",
+                  jbd2_dev_to_name(__entry->dev), __entry->transaction,
+                  __entry->sync_commit)
+);
+
+TRACE_EVENT(jbd2_commit_logging,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        char,   sync_commit               )
+                __field(        int,    transaction               )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->sync_commit = commit_transaction->t_synchronous_commit;
+                __entry->transaction    = commit_transaction->t_tid;
+        ),
+
+        TP_printk("dev %s transaction %d sync %d",
+                  jbd2_dev_to_name(__entry->dev), __entry->transaction,
+                  __entry->sync_commit)
+);
+
+TRACE_EVENT(jbd2_end_commit,
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        char,   sync_commit               )
+                __field(        int,    transaction               )
+                __field(        int,    head                      )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->sync_commit = commit_transaction->t_synchronous_commit;
+                __entry->transaction    = commit_transaction->t_tid;
+                __entry->head           = journal->j_tail_sequence;
+        ),
+
+        TP_printk("dev %s transaction %d sync %d head %d",
+                  jbd2_dev_to_name(__entry->dev), __entry->transaction,
+                  __entry->sync_commit, __entry->head)
+);
+
+TRACE_EVENT(jbd2_submit_inode_data,
+        TP_PROTO(struct inode *inode),
+
+        TP_ARGS(inode),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        ino_t,  ino                     )
+        ),
+
+        TP_fast_assign(
+                __entry->dev    = inode->i_sb->s_dev;
+                __entry->ino    = inode->i_ino;
+        ),
+
+        TP_printk("dev %s ino %lu",
+                  jbd2_dev_to_name(__entry->dev), __entry->ino)
+);
+
+#endif /* _TRACE_JBD2_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>