smb3: add tracepoint for session expired or deleted

In debugging reconnection problems, want to be able to more easily
trace cases in which the server has marked the SMB3 session
expired or deleted (to distinguish from timeout cases).

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index dad6dc7..314556c 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1483,7 +1483,11 @@ smb2_is_session_expired(char *buf)
            shdr->Status != STATUS_USER_SESSION_DELETED)
                return false;
 
+       trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
+                              le16_to_cpu(shdr->Command),
+                              le64_to_cpu(shdr->MessageId));
        cifs_dbg(FYI, "Session expired or deleted\n");
+
        return true;
 }
 

diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index 67e413f..0fdf2f5 100644 (file)
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -281,6 +281,7 @@ DEFINE_EVENT(smb3_cmd_done_class, smb3_##name,    \
        TP_ARGS(tid, sesid, cmd, mid))
 
 DEFINE_SMB3_CMD_DONE_EVENT(cmd_done);
+DEFINE_SMB3_CMD_DONE_EVENT(ses_expired);
 
 DECLARE_EVENT_CLASS(smb3_exit_err_class,
        TP_PROTO(unsigned int xid,