zfs-builds-mm/zfs-0.8.4/cmd/zed/agents/fmd_api.c

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2020-07-19 16:21:53 +02:00
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
*
* Copyright (c) 2016, Intel Corporation.
*/
/*
* This file implements the minimal FMD module API required to support the
* fault logic modules in ZED. This support includes module registration,
* memory allocation, module property accessors, basic case management,
* one-shot timers and SERD engines.
*
* In the ZED runtime, the modules are called from a single thread so no
* locking is required in this emulated FMD environment.
*/
#include <sys/types.h>
#include <sys/fm/protocol.h>
#include <uuid/uuid.h>
#include <signal.h>
#include <strings.h>
#include <time.h>
#include "fmd_api.h"
#include "fmd_serd.h"
#include "zfs_agents.h"
#include "../zed_log.h"
typedef struct fmd_modstat {
fmd_stat_t ms_accepted; /* total events accepted by module */
fmd_stat_t ms_caseopen; /* cases currently open */
fmd_stat_t ms_casesolved; /* total cases solved by module */
fmd_stat_t ms_caseclosed; /* total cases closed by module */
} fmd_modstat_t;
typedef struct fmd_module {
const char *mod_name; /* basename of module (ro) */
const fmd_hdl_info_t *mod_info; /* module info registered with handle */
void *mod_spec; /* fmd_hdl_get/setspecific data value */
fmd_stat_t *mod_ustat; /* module specific custom stats */
uint_t mod_ustat_cnt; /* count of ustat stats */
fmd_modstat_t mod_stats; /* fmd built-in per-module statistics */
fmd_serd_hash_t mod_serds; /* hash of serd engs owned by module */
char *mod_vers; /* a copy of module version string */
} fmd_module_t;
/*
* ZED has two FMD hardwired module instances
*/
fmd_module_t zfs_retire_module;
fmd_module_t zfs_diagnosis_module;
/*
* Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
*/
#ifdef DEBUG
const char *
_umem_debug_init(void)
{
return ("default,verbose"); /* $UMEM_DEBUG setting */
}
const char *
_umem_logging_init(void)
{
return ("fail,contents"); /* $UMEM_LOGGING setting */
}
#endif
/*
* Register a module with fmd and finish module initialization.
* Returns an integer indicating whether it succeeded (zero) or
* failed (non-zero).
*/
int
fmd_hdl_register(fmd_hdl_t *hdl, int version, const fmd_hdl_info_t *mip)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
mp->mod_info = mip;
mp->mod_name = mip->fmdi_desc + 4; /* drop 'ZFS ' prefix */
mp->mod_spec = NULL;
/* bare minimum module stats */
(void) strcpy(mp->mod_stats.ms_accepted.fmds_name, "fmd.accepted");
(void) strcpy(mp->mod_stats.ms_caseopen.fmds_name, "fmd.caseopen");
(void) strcpy(mp->mod_stats.ms_casesolved.fmds_name, "fmd.casesolved");
(void) strcpy(mp->mod_stats.ms_caseclosed.fmds_name, "fmd.caseclosed");
fmd_serd_hash_create(&mp->mod_serds);
fmd_hdl_debug(hdl, "register module");
return (0);
}
void
fmd_hdl_unregister(fmd_hdl_t *hdl)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_modstat_t *msp = &mp->mod_stats;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
/* dump generic module stats */
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_accepted.fmds_name,
msp->ms_accepted.fmds_value.ui64);
if (ops->fmdo_close != NULL) {
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_caseopen.fmds_name,
msp->ms_caseopen.fmds_value.ui64);
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_casesolved.fmds_name,
msp->ms_casesolved.fmds_value.ui64);
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_caseclosed.fmds_name,
msp->ms_caseclosed.fmds_value.ui64);
}
/* dump module specific stats */
if (mp->mod_ustat != NULL) {
int i;
for (i = 0; i < mp->mod_ustat_cnt; i++) {
fmd_hdl_debug(hdl, "%s: %llu",
mp->mod_ustat[i].fmds_name,
mp->mod_ustat[i].fmds_value.ui64);
}
}
fmd_serd_hash_destroy(&mp->mod_serds);
fmd_hdl_debug(hdl, "unregister module");
}
/*
* fmd_hdl_setspecific() is used to associate a data pointer with
* the specified handle for the duration of the module's lifetime.
* This pointer can be retrieved using fmd_hdl_getspecific().
*/
void
fmd_hdl_setspecific(fmd_hdl_t *hdl, void *spec)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
mp->mod_spec = spec;
}
/*
* Return the module-specific data pointer previously associated
* with the handle using fmd_hdl_setspecific().
*/
void *
fmd_hdl_getspecific(fmd_hdl_t *hdl)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
return (mp->mod_spec);
}
void *
fmd_hdl_alloc(fmd_hdl_t *hdl, size_t size, int flags)
{
return (umem_alloc(size, flags));
}
void *
fmd_hdl_zalloc(fmd_hdl_t *hdl, size_t size, int flags)
{
return (umem_zalloc(size, flags));
}
void
fmd_hdl_free(fmd_hdl_t *hdl, void *data, size_t size)
{
umem_free(data, size);
}
/*
* Record a module debug message using the specified format.
*/
void
fmd_hdl_debug(fmd_hdl_t *hdl, const char *format, ...)
{
char message[256];
va_list vargs;
fmd_module_t *mp = (fmd_module_t *)hdl;
va_start(vargs, format);
(void) vsnprintf(message, sizeof (message), format, vargs);
va_end(vargs);
/* prefix message with module name */
zed_log_msg(LOG_INFO, "%s: %s", mp->mod_name, message);
}
/* Property Retrieval */
int32_t
fmd_prop_get_int32(fmd_hdl_t *hdl, const char *name)
{
/*
* These can be looked up in mp->modinfo->fmdi_props
* For now we just hard code for phase 2. In the
* future, there can be a ZED based override.
*/
if (strcmp(name, "spare_on_remove") == 0)
return (1);
if (strcmp(name, "io_N") == 0 || strcmp(name, "checksum_N") == 0)
return (10); /* N = 10 events */
return (0);
}
int64_t
fmd_prop_get_int64(fmd_hdl_t *hdl, const char *name)
{
/*
* These can be looked up in mp->modinfo->fmdi_props
* For now we just hard code for phase 2. In the
* future, there can be a ZED based override.
*/
if (strcmp(name, "remove_timeout") == 0)
return (15ULL * 1000ULL * 1000ULL * 1000ULL); /* 15 sec */
if (strcmp(name, "io_T") == 0 || strcmp(name, "checksum_T") == 0)
return (1000ULL * 1000ULL * 1000ULL * 600ULL); /* 10 min */
return (0);
}
/* FMD Statistics */
fmd_stat_t *
fmd_stat_create(fmd_hdl_t *hdl, uint_t flags, uint_t nstats, fmd_stat_t *statv)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
if (flags == FMD_STAT_NOALLOC) {
mp->mod_ustat = statv;
mp->mod_ustat_cnt = nstats;
}
return (statv);
}
/* Case Management */
fmd_case_t *
fmd_case_open(fmd_hdl_t *hdl, void *data)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
uuid_t uuid;
fmd_case_t *cp;
cp = fmd_hdl_zalloc(hdl, sizeof (fmd_case_t), FMD_SLEEP);
cp->ci_mod = hdl;
cp->ci_state = FMD_CASE_UNSOLVED;
cp->ci_flags = FMD_CF_DIRTY;
cp->ci_data = data;
cp->ci_bufptr = NULL;
cp->ci_bufsiz = 0;
uuid_generate(uuid);
uuid_unparse(uuid, cp->ci_uuid);
fmd_hdl_debug(hdl, "case opened (%s)", cp->ci_uuid);
mp->mod_stats.ms_caseopen.fmds_value.ui64++;
return (cp);
}
void
fmd_case_solve(fmd_hdl_t *hdl, fmd_case_t *cp)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
/*
* For ZED, the event was already sent from fmd_case_add_suspect()
*/
if (cp->ci_state >= FMD_CASE_SOLVED)
fmd_hdl_debug(hdl, "case is already solved or closed");
cp->ci_state = FMD_CASE_SOLVED;
fmd_hdl_debug(hdl, "case solved (%s)", cp->ci_uuid);
mp->mod_stats.ms_casesolved.fmds_value.ui64++;
}
void
fmd_case_close(fmd_hdl_t *hdl, fmd_case_t *cp)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
fmd_hdl_debug(hdl, "case closed (%s)", cp->ci_uuid);
if (ops->fmdo_close != NULL)
ops->fmdo_close(hdl, cp);
mp->mod_stats.ms_caseopen.fmds_value.ui64--;
mp->mod_stats.ms_caseclosed.fmds_value.ui64++;
if (cp->ci_bufptr != NULL && cp->ci_bufsiz > 0)
fmd_hdl_free(hdl, cp->ci_bufptr, cp->ci_bufsiz);
fmd_hdl_free(hdl, cp, sizeof (fmd_case_t));
}
void
fmd_case_uuresolved(fmd_hdl_t *hdl, const char *uuid)
{
fmd_hdl_debug(hdl, "case resolved by uuid (%s)", uuid);
}
int
fmd_case_solved(fmd_hdl_t *hdl, fmd_case_t *cp)
{
return ((cp->ci_state >= FMD_CASE_SOLVED) ? FMD_B_TRUE : FMD_B_FALSE);
}
void
fmd_case_add_ereport(fmd_hdl_t *hdl, fmd_case_t *cp, fmd_event_t *ep)
{
}
static void
zed_log_fault(nvlist_t *nvl, const char *uuid, const char *code)
{
nvlist_t *rsrc;
char *strval;
uint64_t guid;
uint8_t byte;
zed_log_msg(LOG_INFO, "\nzed_fault_event:");
if (uuid != NULL)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_SUSPECT_UUID, uuid);
if (nvlist_lookup_string(nvl, FM_CLASS, &strval) == 0)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_CLASS, strval);
if (code != NULL)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_SUSPECT_DIAG_CODE, code);
if (nvlist_lookup_uint8(nvl, FM_FAULT_CERTAINTY, &byte) == 0)
zed_log_msg(LOG_INFO, "\t%s: %llu", FM_FAULT_CERTAINTY, byte);
if (nvlist_lookup_nvlist(nvl, FM_FAULT_RESOURCE, &rsrc) == 0) {
if (nvlist_lookup_string(rsrc, FM_FMRI_SCHEME, &strval) == 0)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_FMRI_SCHEME,
strval);
if (nvlist_lookup_uint64(rsrc, FM_FMRI_ZFS_POOL, &guid) == 0)
zed_log_msg(LOG_INFO, "\t%s: %llu", FM_FMRI_ZFS_POOL,
guid);
if (nvlist_lookup_uint64(rsrc, FM_FMRI_ZFS_VDEV, &guid) == 0)
zed_log_msg(LOG_INFO, "\t%s: %llu \n", FM_FMRI_ZFS_VDEV,
guid);
}
}
static const char *
fmd_fault_mkcode(nvlist_t *fault)
{
char *class, *code = "-";
/*
* Note: message codes come from: openzfs/usr/src/cmd/fm/dicts/ZFS.po
*/
if (nvlist_lookup_string(fault, FM_CLASS, &class) == 0) {
if (strcmp(class, "fault.fs.zfs.vdev.io") == 0)
code = "ZFS-8000-FD";
else if (strcmp(class, "fault.fs.zfs.vdev.checksum") == 0)
code = "ZFS-8000-GH";
else if (strcmp(class, "fault.fs.zfs.io_failure_wait") == 0)
code = "ZFS-8000-HC";
else if (strcmp(class, "fault.fs.zfs.io_failure_continue") == 0)
code = "ZFS-8000-JQ";
else if (strcmp(class, "fault.fs.zfs.log_replay") == 0)
code = "ZFS-8000-K4";
else if (strcmp(class, "fault.fs.zfs.pool") == 0)
code = "ZFS-8000-CS";
else if (strcmp(class, "fault.fs.zfs.device") == 0)
code = "ZFS-8000-D3";
}
return (code);
}
void
fmd_case_add_suspect(fmd_hdl_t *hdl, fmd_case_t *cp, nvlist_t *fault)
{
nvlist_t *nvl;
const char *code = fmd_fault_mkcode(fault);
int64_t tod[2];
int err = 0;
/*
* payload derived from fmd_protocol_list()
*/
(void) gettimeofday(&cp->ci_tv, NULL);
tod[0] = cp->ci_tv.tv_sec;
tod[1] = cp->ci_tv.tv_usec;
nvl = fmd_nvl_alloc(hdl, FMD_SLEEP);
err |= nvlist_add_uint8(nvl, FM_VERSION, FM_SUSPECT_VERSION);
err |= nvlist_add_string(nvl, FM_CLASS, FM_LIST_SUSPECT_CLASS);
err |= nvlist_add_string(nvl, FM_SUSPECT_UUID, cp->ci_uuid);
err |= nvlist_add_string(nvl, FM_SUSPECT_DIAG_CODE, code);
err |= nvlist_add_int64_array(nvl, FM_SUSPECT_DIAG_TIME, tod, 2);
err |= nvlist_add_uint32(nvl, FM_SUSPECT_FAULT_SZ, 1);
err |= nvlist_add_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST, &fault, 1);
if (err)
zed_log_die("failed to populate nvlist");
zed_log_fault(fault, cp->ci_uuid, code);
zfs_agent_post_event(FM_LIST_SUSPECT_CLASS, NULL, nvl);
nvlist_free(nvl);
nvlist_free(fault);
}
void
fmd_case_setspecific(fmd_hdl_t *hdl, fmd_case_t *cp, void *data)
{
cp->ci_data = data;
}
void *
fmd_case_getspecific(fmd_hdl_t *hdl, fmd_case_t *cp)
{
return (cp->ci_data);
}
void
fmd_buf_create(fmd_hdl_t *hdl, fmd_case_t *cp, const char *name, size_t size)
{
assert(strcmp(name, "data") == 0);
assert(cp->ci_bufptr == NULL);
assert(size < (1024 * 1024));
cp->ci_bufptr = fmd_hdl_alloc(hdl, size, FMD_SLEEP);
cp->ci_bufsiz = size;
}
void
fmd_buf_read(fmd_hdl_t *hdl, fmd_case_t *cp,
const char *name, void *buf, size_t size)
{
assert(strcmp(name, "data") == 0);
assert(cp->ci_bufptr != NULL);
assert(size <= cp->ci_bufsiz);
bcopy(cp->ci_bufptr, buf, size);
}
void
fmd_buf_write(fmd_hdl_t *hdl, fmd_case_t *cp,
const char *name, const void *buf, size_t size)
{
assert(strcmp(name, "data") == 0);
assert(cp->ci_bufptr != NULL);
assert(cp->ci_bufsiz >= size);
bcopy(buf, cp->ci_bufptr, size);
}
/* SERD Engines */
void
fmd_serd_create(fmd_hdl_t *hdl, const char *name, uint_t n, hrtime_t t)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
if (fmd_serd_eng_lookup(&mp->mod_serds, name) != NULL) {
zed_log_msg(LOG_ERR, "failed to create SERD engine '%s': "
" name already exists", name);
return;
}
(void) fmd_serd_eng_insert(&mp->mod_serds, name, n, t);
}
void
fmd_serd_destroy(fmd_hdl_t *hdl, const char *name)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_serd_eng_delete(&mp->mod_serds, name);
fmd_hdl_debug(hdl, "serd_destroy %s", name);
}
int
fmd_serd_exists(fmd_hdl_t *hdl, const char *name)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
return (fmd_serd_eng_lookup(&mp->mod_serds, name) != NULL);
}
void
fmd_serd_reset(fmd_hdl_t *hdl, const char *name)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_serd_eng_t *sgp;
if ((sgp = fmd_serd_eng_lookup(&mp->mod_serds, name)) == NULL) {
zed_log_msg(LOG_ERR, "serd engine '%s' does not exist", name);
return;
}
fmd_serd_eng_reset(sgp);
fmd_hdl_debug(hdl, "serd_reset %s", name);
}
int
fmd_serd_record(fmd_hdl_t *hdl, const char *name, fmd_event_t *ep)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_serd_eng_t *sgp;
int err;
if ((sgp = fmd_serd_eng_lookup(&mp->mod_serds, name)) == NULL) {
zed_log_msg(LOG_ERR, "failed to add record to SERD engine '%s'",
name);
return (FMD_B_FALSE);
}
err = fmd_serd_eng_record(sgp, ep->ev_hrt);
return (err);
}
/* FMD Timers */
static void
_timer_notify(union sigval sv)
{
fmd_timer_t *ftp = sv.sival_ptr;
fmd_hdl_t *hdl = ftp->ft_hdl;
fmd_module_t *mp = (fmd_module_t *)hdl;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
struct itimerspec its;
fmd_hdl_debug(hdl, "timer fired (%p)", ftp->ft_tid);
/* disarm the timer */
bzero(&its, sizeof (struct itimerspec));
timer_settime(ftp->ft_tid, 0, &its, NULL);
/* Note that the fmdo_timeout can remove this timer */
if (ops->fmdo_timeout != NULL)
ops->fmdo_timeout(hdl, ftp, ftp->ft_arg);
}
/*
* Install a new timer which will fire at least delta nanoseconds after the
* current time. After the timeout has expired, the module's fmdo_timeout
* entry point is called.
*/
fmd_timer_t *
fmd_timer_install(fmd_hdl_t *hdl, void *arg, fmd_event_t *ep, hrtime_t delta)
{
struct sigevent sev;
struct itimerspec its;
fmd_timer_t *ftp;
ftp = fmd_hdl_alloc(hdl, sizeof (fmd_timer_t), FMD_SLEEP);
ftp->ft_arg = arg;
ftp->ft_hdl = hdl;
its.it_value.tv_sec = delta / 1000000000;
its.it_value.tv_nsec = delta % 1000000000;
its.it_interval.tv_sec = its.it_value.tv_sec;
its.it_interval.tv_nsec = its.it_value.tv_nsec;
sev.sigev_notify = SIGEV_THREAD;
sev.sigev_notify_function = _timer_notify;
sev.sigev_notify_attributes = NULL;
sev.sigev_value.sival_ptr = ftp;
timer_create(CLOCK_REALTIME, &sev, &ftp->ft_tid);
timer_settime(ftp->ft_tid, 0, &its, NULL);
fmd_hdl_debug(hdl, "installing timer for %d secs (%p)",
(int)its.it_value.tv_sec, ftp->ft_tid);
return (ftp);
}
void
fmd_timer_remove(fmd_hdl_t *hdl, fmd_timer_t *ftp)
{
fmd_hdl_debug(hdl, "removing timer (%p)", ftp->ft_tid);
timer_delete(ftp->ft_tid);
fmd_hdl_free(hdl, ftp, sizeof (fmd_timer_t));
}
/* Name-Value Pair Lists */
nvlist_t *
fmd_nvl_create_fault(fmd_hdl_t *hdl, const char *class, uint8_t certainty,
nvlist_t *asru, nvlist_t *fru, nvlist_t *resource)
{
nvlist_t *nvl;
int err = 0;
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
zed_log_die("failed to xalloc fault nvlist");
err |= nvlist_add_uint8(nvl, FM_VERSION, FM_FAULT_VERSION);
err |= nvlist_add_string(nvl, FM_CLASS, class);
err |= nvlist_add_uint8(nvl, FM_FAULT_CERTAINTY, certainty);
if (asru != NULL)
err |= nvlist_add_nvlist(nvl, FM_FAULT_ASRU, asru);
if (fru != NULL)
err |= nvlist_add_nvlist(nvl, FM_FAULT_FRU, fru);
if (resource != NULL)
err |= nvlist_add_nvlist(nvl, FM_FAULT_RESOURCE, resource);
if (err)
zed_log_die("failed to populate nvlist: %s\n", strerror(err));
return (nvl);
}
/*
* sourced from fmd_string.c
*/
static int
fmd_strmatch(const char *s, const char *p)
{
char c;
if (p == NULL)
return (0);
if (s == NULL)
s = ""; /* treat NULL string as the empty string */
do {
if ((c = *p++) == '\0')
return (*s == '\0');
if (c == '*') {
while (*p == '*')
p++; /* consecutive *'s can be collapsed */
if (*p == '\0')
return (1);
while (*s != '\0') {
if (fmd_strmatch(s++, p) != 0)
return (1);
}
return (0);
}
} while (c == *s++);
return (0);
}
int
fmd_nvl_class_match(fmd_hdl_t *hdl, nvlist_t *nvl, const char *pattern)
{
char *class;
return (nvl != NULL &&
nvlist_lookup_string(nvl, FM_CLASS, &class) == 0 &&
fmd_strmatch(class, pattern));
}
nvlist_t *
fmd_nvl_alloc(fmd_hdl_t *hdl, int flags)
{
nvlist_t *nvl = NULL;
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
return (NULL);
return (nvl);
}
/*
* ZED Agent specific APIs
*/
fmd_hdl_t *
fmd_module_hdl(const char *name)
{
if (strcmp(name, "zfs-retire") == 0)
return ((fmd_hdl_t *)&zfs_retire_module);
if (strcmp(name, "zfs-diagnosis") == 0)
return ((fmd_hdl_t *)&zfs_diagnosis_module);
return (NULL);
}
boolean_t
fmd_module_initialized(fmd_hdl_t *hdl)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
return (mp->mod_info != NULL);
}
/*
* fmd_module_recv is called for each event that is received by
* the fault manager that has a class that matches one of the
* module's subscriptions.
*/
void
fmd_module_recv(fmd_hdl_t *hdl, nvlist_t *nvl, const char *class)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
fmd_event_t faux_event = {0};
int64_t *tv;
uint_t n;
/*
* Will need to normalized this if we persistently store the case data
*/
if (nvlist_lookup_int64_array(nvl, FM_EREPORT_TIME, &tv, &n) == 0)
faux_event.ev_hrt = tv[0] * NANOSEC + tv[1];
else
faux_event.ev_hrt = 0;
ops->fmdo_recv(hdl, &faux_event, nvl, class);
mp->mod_stats.ms_accepted.fmds_value.ui64++;
/* TBD - should we initiate fm_module_gc() periodically? */
}