NFSv4: Add a tracepoint to document open stateid updates

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index cec4bcba65e8..aa8ea518ec6f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1481,6 +1481,7 @@ static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
         if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
                 nfs4_stateid_copy(&state->stateid, stateid);
         nfs4_stateid_copy(&state->open_stateid, stateid);
+        trace_nfs4_open_stateid_update(state->inode, stateid, 0);
 out:
         nfs_state_log_update_open_stateid(state);
 }
@@ -1524,6 +1525,7 @@ static void nfs_set_open_stateid_locked(struct nfs4_state *state,
                 write_sequnlock(&state->seqlock);
                 spin_unlock(&state->owner->so_lock);
                 rcu_read_unlock();
+                trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
                 if (!signal_pending(current)) {
                         if (schedule_timeout(5*HZ) == 0)
                                 status = -EAGAIN;
@@ -1545,6 +1547,7 @@ static void nfs_set_open_stateid_locked(struct nfs4_state *state,
         if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
                 nfs4_stateid_copy(&state->stateid, stateid);
         nfs4_stateid_copy(&state->open_stateid, stateid);
+        trace_nfs4_open_stateid_update(state->inode, stateid, status);
         nfs_state_log_update_open_stateid(state);
 }
 
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 7a5588c25f70..06ac7156c44b 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -1061,6 +1061,8 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_event,
 
 DEFINE_NFS4_INODE_STATEID_EVENT(nfs4_setattr);
 DEFINE_NFS4_INODE_STATEID_EVENT(nfs4_delegreturn);
+DEFINE_NFS4_INODE_STATEID_EVENT(nfs4_open_stateid_update);
+DEFINE_NFS4_INODE_STATEID_EVENT(nfs4_open_stateid_update_wait);
 
 DECLARE_EVENT_CLASS(nfs4_getattr_event,
                 TP_PROTO(