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Commit 7937ca96 authored by Steve French's avatar Steve French
Browse files

smb3: add dynamic tracepoint for timeout waiting for credits



To help debug credit starvation problems where we timeout
waiting for server to grant the client credits.

Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
Reviewed-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: default avatarPavel Shilovsky <pshilov@microsoft.com>
parent ffd1ef1e
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+1 −0
Original line number Diff line number Diff line
@@ -713,6 +713,7 @@ DEFINE_EVENT(smb3_credit_class, smb3_##name, \
	TP_ARGS(currmid, hostname, credits))

DEFINE_SMB3_CREDIT_EVENT(reconnect_with_invalid_credits);
DEFINE_SMB3_CREDIT_EVENT(credit_timeout);

#endif /* _CIFS_TRACE_H */

+5 −0
Original line number Diff line number Diff line
@@ -527,6 +527,8 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
				has_credits(server, credits, num_credits), t);
			cifs_num_waiters_dec(server);
			if (!rc) {
				trace_smb3_credit_timeout(server->CurrentMid,
					server->hostname, num_credits);
				cifs_dbg(VFS, "wait timed out after %d ms\n",
					 timeout);
				return -ENOTSUPP;
@@ -565,6 +567,9 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
					t);
				cifs_num_waiters_dec(server);
				if (!rc) {
					trace_smb3_credit_timeout(
						server->CurrentMid,
						server->hostname, num_credits);
					cifs_dbg(VFS, "wait timed out after %d ms\n",
						 timeout);
					return -ENOTSUPP;