Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

fs/cifs/trace.h

+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 */

fs/cifs/transport.c

+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;