jbd: Add fixed tracepoints

This commit adds fixed tracepoint for jbd. It has been based on fixed
tracepoints for jbd2, however there are missing those for collecting
statistics, since I think that it will require more intrusive patch so I
should have its own commit, if someone decide that it is needed. Also
there are new tracepoints in __journal_drop_transaction() and
journal_update_superblock().

The list of jbd tracepoints:

jbd_checkpoint
jbd_start_commit
jbd_commit_locking
jbd_commit_flushing
jbd_commit_logging
jbd_drop_transaction
jbd_end_commit
jbd_do_submit_data
jbd_cleanup_journal_tail
jbd_update_superblock_end

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 203 insertions, 0 deletions

diff --git a/include/trace/events/jbd.h b/include/trace/events/jbd.h
new file mode 100644
index 000000000000..aff64d82d713
--- /dev/null
+++ b/include/trace/events/jbd.h
@@ -0,0 +1,203 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM jbd
+
+#if !defined(_TRACE_JBD_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_JBD_H
+
+#include <linux/jbd.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(jbd_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 %d,%d result %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->result)
+);
+
+DECLARE_EVENT_CLASS(jbd_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 %d,%d transaction %d sync %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->transaction, __entry->sync_commit)
+);
+
+DEFINE_EVENT(jbd_commit, jbd_start_commit,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction)
+);
+
+DEFINE_EVENT(jbd_commit, jbd_commit_locking,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction)
+);
+
+DEFINE_EVENT(jbd_commit, jbd_commit_flushing,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction)
+);
+
+DEFINE_EVENT(jbd_commit, jbd_commit_logging,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction)
+);
+
+TRACE_EVENT(jbd_drop_transaction,
+
+        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 %d,%d transaction %d sync %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->transaction, __entry->sync_commit)
+);
+
+TRACE_EVENT(jbd_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 %d,%d transaction %d sync %d head %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->transaction, __entry->sync_commit, __entry->head)
+);
+
+TRACE_EVENT(jbd_do_submit_data,
+        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 %d,%d transaction %d sync %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                   __entry->transaction, __entry->sync_commit)
+);
+
+TRACE_EVENT(jbd_cleanup_journal_tail,
+
+        TP_PROTO(journal_t *journal, tid_t first_tid,
+                 unsigned long block_nr, unsigned long freed),
+
+        TP_ARGS(journal, first_tid, block_nr, freed),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        tid_t,  tail_sequence           )
+                __field(        tid_t,  first_tid               )
+                __field(unsigned long,  block_nr                )
+                __field(unsigned long,  freed                   )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->tail_sequence  = journal->j_tail_sequence;
+                __entry->first_tid      = first_tid;
+                __entry->block_nr       = block_nr;
+                __entry->freed          = freed;
+        ),
+
+        TP_printk("dev %d,%d from %u to %u offset %lu freed %lu",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->tail_sequence, __entry->first_tid,
+                  __entry->block_nr, __entry->freed)
+);
+
+TRACE_EVENT(jbd_update_superblock_end,
+        TP_PROTO(journal_t *journal, int wait),
+
+        TP_ARGS(journal, wait),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(        int,    wait                    )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->wait           = wait;
+        ),
+
+        TP_printk("dev %d,%d wait %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                   __entry->wait)
+);
+
+#endif /* _TRACE_JBD_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>