Display number of credits available

commit 9742805d6b1bfb45d7f267648c34fb5bcd347397 upstream.

In debugging smb3, it is useful to display the number
of credits available, so we can see when the server has not granted
sufficient operations for the client to make progress, or alternatively
the client has requested too many credits (as we saw in a recent bug)
so we can compare with the number of credits the server thinks
we have.

Add a /proc/fs/cifs/DebugData line to display the client view
on how many credits are available.

Signed-off-by: Steve French <steve.french@primarydata.com>
Reported-by: Germano Percossi <germano.percossi@citrix.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index f3ac4154cbb606707956d9fbbd2a64ec553a9ceb..5a3e796461beb10848b592c304720c590b3a2c31 100644 (file)
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -170,6 +170,7 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
        list_for_each(tmp1, &cifs_tcp_ses_list) {
                server = list_entry(tmp1, struct TCP_Server_Info,
                                    tcp_ses_list);
+               seq_printf(m, "\nNumber of credits: %d", server->credits);
                i++;
                list_for_each(tmp2, &server->smb_ses_list) {
                        ses = list_entry(tmp2, struct cifs_ses,