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Improve CARP logging so that all state transitions are logged.

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sys/netinet/ip_carp.c:
	Add a "reason" string parameter to carp_set_state() and
	carp_master_down_locked() allowing more specific logging
	information to be passed into these apis.

	Refactor existing state transition logging into a single
	log call in carp_set_state().

	Update all calls to carp_set_state() and
	carp_master_down_locked() to pass an appropriate reason
	string.  For state transitions that were previously logged,
	the output should be unchanged.

Submitted by:	gibbs (original), asomers (updated)
MFC after:	1 week
Sponsored by:	Spectra Logic
MFSpectraBSD:	1039697 on 2014/02/11 (original)
		1049992 on 2014/03/21 (updated)
This commit is contained in:
Will Andrews 2015-01-22 17:09:54 +00:00
parent 379694e3d3
commit d01641e2c1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=277530
1 changed files with 23 additions and 34 deletions
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57
sys/netinet/ip_carp.c
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@ -304,11 +304,12 @@ static void carp_destroy(struct carp_softc *);
static struct carp_if
*carp_alloc_if(struct ifnet *);
static void carp_free_if(struct carp_if *);
static void carp_set_state(struct carp_softc *, int);
static void carp_set_state(struct carp_softc *, int, const char* reason);
static void carp_sc_state(struct carp_softc *);
static void carp_setrun(struct carp_softc *, sa_family_t);
static void carp_master_down(void *);
static void carp_master_down_locked(struct carp_softc *);
static void carp_master_down_locked(struct carp_softc *,
const char* reason);
static void carp_send_ad(void *);
static void carp_send_ad_locked(struct carp_softc *);
static void carp_addroute(struct carp_softc *);
@ -654,11 +655,8 @@ carp_input_c(struct mbuf *m, struct carp_header *ch, sa_family_t af)
if (timevalcmp(&sc_tv, &ch_tv, >) ||
timevalcmp(&sc_tv, &ch_tv, ==)) {
callout_stop(&sc->sc_ad_tmo);
CARP_LOG("VHID %u@%s: MASTER -> BACKUP "
"(more frequent advertisement received)\n",
sc->sc_vhid,
sc->sc_carpdev->if_xname);
carp_set_state(sc, BACKUP);
carp_set_state(sc, BACKUP,
"more frequent advertisement received");
carp_setrun(sc, 0);
carp_delroute(sc);
}
@ -669,11 +667,8 @@ carp_input_c(struct mbuf *m, struct carp_header *ch, sa_family_t af)
* and this one claims to be slower, treat him as down.
*/
if (V_carp_preempt && timevalcmp(&sc_tv, &ch_tv, <)) {
CARP_LOG("VHID %u@%s: BACKUP -> MASTER "
"(preempting a slower master)\n",
sc->sc_vhid,
sc->sc_carpdev->if_xname);
carp_master_down_locked(sc);
carp_master_down_locked(sc,
"preempting a slower master");
break;
}
@ -684,11 +679,7 @@ carp_input_c(struct mbuf *m, struct carp_header *ch, sa_family_t af)
*/
sc_tv.tv_sec = sc->sc_advbase * 3;
if (timevalcmp(&sc_tv, &ch_tv, <)) {
CARP_LOG("VHID %u@%s: BACKUP -> MASTER "
"(master timed out)\n",
sc->sc_vhid,
sc->sc_carpdev->if_xname);
carp_master_down_locked(sc);
carp_master_down_locked(sc, "master will time out");
break;
}
@ -1153,10 +1144,7 @@ carp_master_down(void *v)
CURVNET_SET(sc->sc_carpdev->if_vnet);
if (sc->sc_state == BACKUP) {
CARP_LOG("VHID %u@%s: BACKUP -> MASTER (master down)\n",
sc->sc_vhid,
sc->sc_carpdev->if_xname);
carp_master_down_locked(sc);
carp_master_down_locked(sc, "master timed out");
}
CURVNET_RESTORE();
@ -1164,14 +1152,14 @@ carp_master_down(void *v)
}
static void
carp_master_down_locked(struct carp_softc *sc)
carp_master_down_locked(struct carp_softc *sc, const char *reason)
{
CARP_LOCK_ASSERT(sc);
switch (sc->sc_state) {
case BACKUP:
carp_set_state(sc, MASTER);
carp_set_state(sc, MASTER, reason);
carp_send_ad_locked(sc);
#ifdef INET
carp_send_arp(sc);
@ -1212,10 +1200,7 @@ carp_setrun(struct carp_softc *sc, sa_family_t af)
switch (sc->sc_state) {
case INIT:
CARP_LOG("VHID %u@%s: INIT -> BACKUP\n",
sc->sc_vhid,
sc->sc_carpdev->if_xname);
carp_set_state(sc, BACKUP);
carp_set_state(sc, BACKUP, "initialization complete");
carp_setrun(sc, 0);
break;
case BACKUP:
@ -1717,12 +1702,12 @@ carp_ioctl(struct ifreq *ifr, u_long cmd, struct thread *td)
switch (carpr.carpr_state) {
case BACKUP:
callout_stop(&sc->sc_ad_tmo);
carp_set_state(sc, BACKUP);
carp_set_state(sc, BACKUP, "SIOCSVH");
carp_setrun(sc, 0);
carp_delroute(sc);
break;
case MASTER:
carp_master_down_locked(sc);
carp_master_down_locked(sc, "SIOCSVH");
break;
default:
break;
@ -1964,7 +1949,7 @@ carp_detach_locked(struct ifaddr *ifa)
}
static void
carp_set_state(struct carp_softc *sc, int state)
carp_set_state(struct carp_softc *sc, int state, const char *reason)
{
CARP_LOCK_ASSERT(sc);
@ -1973,10 +1958,14 @@ carp_set_state(struct carp_softc *sc, int state)
const char *carp_states[] = { CARP_STATES };
char subsys[IFNAMSIZ+5];
sc->sc_state = state;
snprintf(subsys, IFNAMSIZ+5, "%u@%s", sc->sc_vhid,
sc->sc_carpdev->if_xname);
CARP_LOG("%s: %s -> %s (%s)\n", subsys,
carp_states[sc->sc_state], carp_states[state], reason);
sc->sc_state = state;
devctl_notify("CARP", subsys, carp_states[state], NULL);
}
}
@ -2010,13 +1999,13 @@ carp_sc_state(struct carp_softc *sc)
#ifdef INET6
callout_stop(&sc->sc_md6_tmo);
#endif
carp_set_state(sc, INIT);
carp_set_state(sc, INIT, "hw interface down");
carp_setrun(sc, 0);
if (!sc->sc_suppress)
carp_demote_adj(V_carp_ifdown_adj, "interface down");
sc->sc_suppress = 1;
} else {
carp_set_state(sc, INIT);
carp_set_state(sc, INIT, "hw interface up");
carp_setrun(sc, 0);
if (sc->sc_suppress)
carp_demote_adj(-V_carp_ifdown_adj, "interface up");