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Commit 2f92ae34 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4.1: Add tracepoints for debugging slot table operations 



Add tracepoints to nfs41_setup_sequence and nfs41_sequence_done
to track session and slot table state changes.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 1037e6ea

fs/nfs/callback_proc.c

+1 −0
Original line number Diff line number Diff line
@@ -464,6 +464,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 
	} else

		res->csr_status = status;



	trace_nfs4_cb_sequence(args, res, status);

	dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,

		ntohl(status), ntohl(res->csr_status));

	return status;

fs/nfs/nfs4proc.c

+2 −0
Original line number Diff line number Diff line
@@ -508,6 +508,7 @@ static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res * 
		interrupted = true;

	}



	trace_nfs4_sequence_done(session, res);

	/* Check the SEQUENCE operation status */

	switch (res->sr_status) {

	case 0:
@@ -660,6 +661,7 @@ int nfs41_setup_sequence(struct nfs4_session *session, 
	 * set to 1 if an rpc level failure occurs.

	 */

	res->sr_status = 1;

	trace_nfs4_setup_sequence(session, args);

out_success:

	rpc_call_start(task);

	return 0;

fs/nfs/nfs4session.h

+10 −0
Original line number Diff line number Diff line
@@ -117,6 +117,16 @@ static inline int nfs4_has_persistent_session(const struct nfs_client *clp) 
	return 0;

}



#ifdef CONFIG_CRC32

/*

 * nfs_session_id_hash - calculate the crc32 hash for the session id

 * @session - pointer to session

 */

#define nfs_session_id_hash(sess_id) \

	(~crc32_le(0xFFFFFFFF, &(sess_id)->data[0], sizeof((sess_id)->data)))

#else

#define nfs_session_id_hash(session) (0)

#endif

#else /* defined(CONFIG_NFS_V4_1) */



static inline int nfs4_init_session(struct nfs_client *clp)

fs/nfs/nfs4trace.c

+2 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 
#include <linux/nfs_fs.h>

#include "nfs4_fs.h"

#include "internal.h"

#include "nfs4session.h"

#include "callback.h"



#define CREATE_TRACE_POINTS

#include "nfs4trace.h"

fs/nfs/nfs4trace.h

+139 −0
Original line number Diff line number Diff line
@@ -240,6 +240,145 @@ DEFINE_NFS4_CLIENTID_EVENT(nfs4_destroy_clientid); 
DEFINE_NFS4_CLIENTID_EVENT(nfs4_bind_conn_to_session);

DEFINE_NFS4_CLIENTID_EVENT(nfs4_sequence);

DEFINE_NFS4_CLIENTID_EVENT(nfs4_reclaim_complete);



TRACE_EVENT(nfs4_setup_sequence,

		TP_PROTO(

			const struct nfs4_session *session,

			const struct nfs4_sequence_args *args

		),

		TP_ARGS(session, args),



		TP_STRUCT__entry(

			__field(unsigned int, session)

			__field(unsigned int, slot_nr)

			__field(unsigned int, seq_nr)

			__field(unsigned int, highest_used_slotid)

		),



		TP_fast_assign(

			const struct nfs4_slot *sa_slot = args->sa_slot;

			__entry->session = nfs_session_id_hash(&session->sess_id);

			__entry->slot_nr = sa_slot->slot_nr;

			__entry->seq_nr = sa_slot->seq_nr;

			__entry->highest_used_slotid =

					sa_slot->table->highest_used_slotid;

		),

		TP_printk(

			"session=0x%08x slot_nr=%u seq_nr=%u "

			"highest_used_slotid=%u",

			__entry->session,

			__entry->slot_nr,

			__entry->seq_nr,

			__entry->highest_used_slotid

		)

);



#define show_nfs4_sequence_status_flags(status) \

	__print_flags((unsigned long)status, "|", \

		{ SEQ4_STATUS_CB_PATH_DOWN, "CB_PATH_DOWN" }, \

		{ SEQ4_STATUS_CB_GSS_CONTEXTS_EXPIRING, \

			"CB_GSS_CONTEXTS_EXPIRING" }, \

		{ SEQ4_STATUS_CB_GSS_CONTEXTS_EXPIRED, \

			"CB_GSS_CONTEXTS_EXPIRED" }, \

		{ SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED, \

			"EXPIRED_ALL_STATE_REVOKED" }, \

		{ SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED, \

			"EXPIRED_SOME_STATE_REVOKED" }, \

		{ SEQ4_STATUS_ADMIN_STATE_REVOKED, \

			"ADMIN_STATE_REVOKED" }, \

		{ SEQ4_STATUS_RECALLABLE_STATE_REVOKED,	 \

			"RECALLABLE_STATE_REVOKED" }, \

		{ SEQ4_STATUS_LEASE_MOVED, "LEASE_MOVED" }, \

		{ SEQ4_STATUS_RESTART_RECLAIM_NEEDED, \

			"RESTART_RECLAIM_NEEDED" }, \

		{ SEQ4_STATUS_CB_PATH_DOWN_SESSION, \

			"CB_PATH_DOWN_SESSION" }, \

		{ SEQ4_STATUS_BACKCHANNEL_FAULT, \

			"BACKCHANNEL_FAULT" })



TRACE_EVENT(nfs4_sequence_done,

		TP_PROTO(

			const struct nfs4_session *session,

			const struct nfs4_sequence_res *res

		),

		TP_ARGS(session, res),



		TP_STRUCT__entry(

			__field(unsigned int, session)

			__field(unsigned int, slot_nr)

			__field(unsigned int, seq_nr)

			__field(unsigned int, highest_slotid)

			__field(unsigned int, target_highest_slotid)

			__field(unsigned int, status_flags)

			__field(int, error)

		),



		TP_fast_assign(

			const struct nfs4_slot *sr_slot = res->sr_slot;

			__entry->session = nfs_session_id_hash(&session->sess_id);

			__entry->slot_nr = sr_slot->slot_nr;

			__entry->seq_nr = sr_slot->seq_nr;

			__entry->highest_slotid = res->sr_highest_slotid;

			__entry->target_highest_slotid =

					res->sr_target_highest_slotid;

			__entry->error = res->sr_status;

		),

		TP_printk(

			"error=%d (%s) session=0x%08x slot_nr=%u seq_nr=%u "

			"highest_slotid=%u target_highest_slotid=%u "

			"status_flags=%u (%s)",

			__entry->error,

			show_nfsv4_errors(__entry->error),

			__entry->session,

			__entry->slot_nr,

			__entry->seq_nr,

			__entry->highest_slotid,

			__entry->target_highest_slotid,

			__entry->status_flags,

			show_nfs4_sequence_status_flags(__entry->status_flags)

		)

);



struct cb_sequenceargs;

struct cb_sequenceres;



TRACE_EVENT(nfs4_cb_sequence,

		TP_PROTO(

			const struct cb_sequenceargs *args,

			const struct cb_sequenceres *res,

			__be32 status

		),

		TP_ARGS(args, res, status),



		TP_STRUCT__entry(

			__field(unsigned int, session)

			__field(unsigned int, slot_nr)

			__field(unsigned int, seq_nr)

			__field(unsigned int, highest_slotid)

			__field(unsigned int, cachethis)

			__field(int, error)

		),



		TP_fast_assign(

			__entry->session = nfs_session_id_hash(&args->csa_sessionid);

			__entry->slot_nr = args->csa_slotid;

			__entry->seq_nr = args->csa_sequenceid;

			__entry->highest_slotid = args->csa_highestslotid;

			__entry->cachethis = args->csa_cachethis;

			__entry->error = -be32_to_cpu(status);

		),



		TP_printk(

			"error=%d (%s) session=0x%08x slot_nr=%u seq_nr=%u "

			"highest_slotid=%u",

			__entry->error,

			show_nfsv4_errors(__entry->error),

			__entry->session,

			__entry->slot_nr,

			__entry->seq_nr,

			__entry->highest_slotid

		)

);

#endif /* CONFIG_NFS_V4_1 */



DECLARE_EVENT_CLASS(nfs4_open_event,