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 dad6dc7632004ceafc4034f133e4caf9595ea482..314556c083f320c5e1c0422e4c09bb3ed053ae30 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 67e413f6ee4d8fd1dbd1eede0a7b0a9e6442a9e3..0fdf2f5c07ba997218d49b16cab904cf51b8432b 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,