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: Ben Hutchings <ben@decadent.org.uk>

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index a7e223bbf8df28459aa247818d245f21ce7c362f..ab4f1ce11ed0cf0475e5dba9851203727b3864b2 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,