Commit 511ba52e authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
Browse files

NFS4: Trace state recovery operation 



Add a trace point in the main state manager loop to observe state
recovery operation. Help track down state recovery bugs.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 4e121fca

fs/nfs/nfs4state.c

+3 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ 
#include "nfs4session.h"

#include "pnfs.h"

#include "netns.h"

#include "nfs4trace.h"



#define NFSDBG_FACILITY		NFSDBG_STATE
@@ -2539,6 +2540,7 @@ static void nfs4_state_manager(struct nfs_client *clp) 


	/* Ensure exclusive access to NFSv4 state */

	do {

		trace_nfs4_state_mgr(clp);

		clear_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state);

		if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {

			section = "purge state";
@@ -2652,6 +2654,7 @@ static void nfs4_state_manager(struct nfs_client *clp) 
out_error:

	if (strlen(section))

		section_sep = ": ";

	trace_nfs4_state_mgr_failed(clp, section, status);

	pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"

			" with error %d\n", section_sep, section,

			clp->cl_hostname, -status);

fs/nfs/nfs4trace.h

+93 −0
Original line number Diff line number Diff line
@@ -562,6 +562,99 @@ TRACE_EVENT(nfs4_setup_sequence, 
		)

);



TRACE_DEFINE_ENUM(NFS4CLNT_MANAGER_RUNNING);

TRACE_DEFINE_ENUM(NFS4CLNT_CHECK_LEASE);

TRACE_DEFINE_ENUM(NFS4CLNT_LEASE_EXPIRED);

TRACE_DEFINE_ENUM(NFS4CLNT_RECLAIM_REBOOT);

TRACE_DEFINE_ENUM(NFS4CLNT_RECLAIM_NOGRACE);

TRACE_DEFINE_ENUM(NFS4CLNT_DELEGRETURN);

TRACE_DEFINE_ENUM(NFS4CLNT_SESSION_RESET);

TRACE_DEFINE_ENUM(NFS4CLNT_LEASE_CONFIRM);

TRACE_DEFINE_ENUM(NFS4CLNT_SERVER_SCOPE_MISMATCH);

TRACE_DEFINE_ENUM(NFS4CLNT_PURGE_STATE);

TRACE_DEFINE_ENUM(NFS4CLNT_BIND_CONN_TO_SESSION);

TRACE_DEFINE_ENUM(NFS4CLNT_MOVED);

TRACE_DEFINE_ENUM(NFS4CLNT_LEASE_MOVED);

TRACE_DEFINE_ENUM(NFS4CLNT_DELEGATION_EXPIRED);

TRACE_DEFINE_ENUM(NFS4CLNT_RUN_MANAGER);

TRACE_DEFINE_ENUM(NFS4CLNT_DELEGRETURN_RUNNING);



#define show_nfs4_clp_state(state) \

	__print_flags(state, "|", \

		{ NFS4CLNT_MANAGER_RUNNING,	"MANAGER_RUNNING" }, \

		{ NFS4CLNT_CHECK_LEASE,		"CHECK_LEASE" }, \

		{ NFS4CLNT_LEASE_EXPIRED,	"LEASE_EXPIRED" }, \

		{ NFS4CLNT_RECLAIM_REBOOT,	"RECLAIM_REBOOT" }, \

		{ NFS4CLNT_RECLAIM_NOGRACE,	"RECLAIM_NOGRACE" }, \

		{ NFS4CLNT_DELEGRETURN,		"DELEGRETURN" }, \

		{ NFS4CLNT_SESSION_RESET,	"SESSION_RESET" }, \

		{ NFS4CLNT_LEASE_CONFIRM,	"LEASE_CONFIRM" }, \

		{ NFS4CLNT_SERVER_SCOPE_MISMATCH, \

						"SERVER_SCOPE_MISMATCH" }, \

		{ NFS4CLNT_PURGE_STATE,		"PURGE_STATE" }, \

		{ NFS4CLNT_BIND_CONN_TO_SESSION, \

						"BIND_CONN_TO_SESSION" }, \

		{ NFS4CLNT_MOVED,		"MOVED" }, \

		{ NFS4CLNT_LEASE_MOVED,		"LEASE_MOVED" }, \

		{ NFS4CLNT_DELEGATION_EXPIRED,	"DELEGATION_EXPIRED" }, \

		{ NFS4CLNT_RUN_MANAGER,		"RUN_MANAGER" }, \

		{ NFS4CLNT_DELEGRETURN_RUNNING,	"DELEGRETURN_RUNNING" })



TRACE_EVENT(nfs4_state_mgr,

		TP_PROTO(

			const struct nfs_client *clp

		),



		TP_ARGS(clp),



		TP_STRUCT__entry(

			__field(unsigned long, state)

			__string(hostname, clp->cl_hostname)

		),



		TP_fast_assign(

			__entry->state = clp->cl_state;

			__assign_str(hostname, clp->cl_hostname)

		),



		TP_printk(

			"hostname=%s clp state=%s", __get_str(hostname),

			show_nfs4_clp_state(__entry->state)

		)

)



TRACE_EVENT(nfs4_state_mgr_failed,

		TP_PROTO(

			const struct nfs_client *clp,

			const char *section,

			int status

		),



		TP_ARGS(clp, section, status),



		TP_STRUCT__entry(

			__field(unsigned long, error)

			__field(unsigned long, state)

			__string(hostname, clp->cl_hostname)

			__string(section, section)

		),



		TP_fast_assign(

			__entry->error = status;

			__entry->state = clp->cl_state;

			__assign_str(hostname, clp->cl_hostname);

			__assign_str(section, section);

		),



		TP_printk(

			"hostname=%s clp state=%s error=%ld (%s) section=%s",

			__get_str(hostname),

			show_nfs4_clp_state(__entry->state), -__entry->error,

			show_nfsv4_errors(__entry->error), __get_str(section)



		)

)



TRACE_EVENT(nfs4_xdr_status,

		TP_PROTO(

			const struct xdr_stream *xdr,