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Commit d6e24788 authored by David Teigland's avatar David Teigland
Browse files

dlm: limit rcom debug messages 



Unify the checking for both types of ignored
rcom messages, and replace the two log_debug
statements with a single, rate limited debug
message.

Signed-off-by: default avatarDavid Teigland <teigland@redhat.com>
parent 13ef1111

fs/dlm/dlm_internal.h

+8 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/miscdevice.h>

#include <linux/mutex.h>

#include <linux/idr.h>

#include <linux/ratelimit.h>

#include <asm/uaccess.h>



#include <linux/dlm.h>
@@ -74,6 +75,13 @@ do { \ 
		       (ls)->ls_name , ##args); \

} while (0)



#define log_limit(ls, fmt, args...) \

do { \

	if (dlm_config.ci_log_debug) \

		printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \

			(ls)->ls_name , ##args); \

} while (0)



#define DLM_ASSERT(x, do) \

{ \

  if (!(x)) \

fs/dlm/rcom.c

+20 −28
Original line number Diff line number Diff line
@@ -486,47 +486,39 @@ int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in) 
	return 0;

}



static int is_old_reply(struct dlm_ls *ls, struct dlm_rcom *rc)

/* Called by dlm_recv; corresponds to dlm_receive_message() but special

   recovery-only comms are sent through here. */



void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)

{

	int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);

	int stop, reply = 0;

	uint64_t seq;

	int rv = 0;



	switch (rc->rc_type) {

	case DLM_RCOM_STATUS_REPLY:

	case DLM_RCOM_NAMES_REPLY:

	case DLM_RCOM_LOOKUP_REPLY:

	case DLM_RCOM_LOCK_REPLY:

		reply = 1;

	};



	spin_lock(&ls->ls_recover_lock);

	stop = test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);

	seq = ls->ls_recover_seq;

	spin_unlock(&ls->ls_recover_lock);

		if (rc->rc_seq_reply != seq) {

			log_debug(ls, "ignoring old reply %x from %d "

				      "seq_reply %llx expect %llx",

				      rc->rc_type, rc->rc_header.h_nodeid,



	if ((stop && (rc->rc_type != DLM_RCOM_STATUS)) ||

	    (reply && (rc->rc_seq_reply != seq))) {

		log_limit(ls, "dlm_receive_rcom ignore msg %d "

			  "from %d %llu %llu seq %llu",

			   rc->rc_type, nodeid,

			   (unsigned long long)rc->rc_seq,

			   (unsigned long long)rc->rc_seq_reply,

			   (unsigned long long)seq);

			rv = 1;

		}

	}

	return rv;

}



/* Called by dlm_recv; corresponds to dlm_receive_message() but special

   recovery-only comms are sent through here. */



void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)

{

	int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);



	if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) {

		log_debug(ls, "ignoring recovery message %x from %d",

			  rc->rc_type, nodeid);

		goto out;

	}



	if (is_old_reply(ls, rc))

		goto out;



	switch (rc->rc_type) {

	case DLM_RCOM_STATUS:

		receive_rcom_status(ls, rc);