zfs-builds-mm/zfs-2.0.0-rc4/module/os/freebsd/spl/spl_sysevent.c

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2020-10-22 14:20:35 +02:00
/*
* Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* Copyright (c) 2020 iXsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kmem.h>
#include <sys/list.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/nvpair.h>
#include <sys/sunddi.h>
#include <sys/sysevent.h>
#include <sys/fm/protocol.h>
#include <sys/fm/util.h>
#include <sys/bus.h>
static int
log_sysevent(nvlist_t *event)
{
struct sbuf *sb;
const char *type;
char typestr[128];
nvpair_t *elem = NULL;
sb = sbuf_new_auto();
if (sb == NULL)
return (ENOMEM);
type = NULL;
while ((elem = nvlist_next_nvpair(event, elem)) != NULL) {
switch (nvpair_type(elem)) {
case DATA_TYPE_BOOLEAN:
{
boolean_t value;
(void) nvpair_value_boolean_value(elem, &value);
sbuf_printf(sb, " %s=%s", nvpair_name(elem),
value ? "true" : "false");
break;
}
case DATA_TYPE_UINT8:
{
uint8_t value;
(void) nvpair_value_uint8(elem, &value);
sbuf_printf(sb, " %s=%hhu", nvpair_name(elem), value);
break;
}
case DATA_TYPE_INT32:
{
int32_t value;
(void) nvpair_value_int32(elem, &value);
sbuf_printf(sb, " %s=%jd", nvpair_name(elem),
(intmax_t)value);
break;
}
case DATA_TYPE_UINT32:
{
uint32_t value;
(void) nvpair_value_uint32(elem, &value);
sbuf_printf(sb, " %s=%ju", nvpair_name(elem),
(uintmax_t)value);
break;
}
case DATA_TYPE_INT64:
{
int64_t value;
(void) nvpair_value_int64(elem, &value);
sbuf_printf(sb, " %s=%jd", nvpair_name(elem),
(intmax_t)value);
break;
}
case DATA_TYPE_UINT64:
{
uint64_t value;
(void) nvpair_value_uint64(elem, &value);
sbuf_printf(sb, " %s=%ju", nvpair_name(elem),
(uintmax_t)value);
break;
}
case DATA_TYPE_STRING:
{
char *value;
(void) nvpair_value_string(elem, &value);
sbuf_printf(sb, " %s=%s", nvpair_name(elem), value);
if (strcmp(FM_CLASS, nvpair_name(elem)) == 0)
type = value;
break;
}
case DATA_TYPE_UINT8_ARRAY:
{
uint8_t *value;
uint_t ii, nelem;
(void) nvpair_value_uint8_array(elem, &value, &nelem);
sbuf_printf(sb, " %s=", nvpair_name(elem));
for (ii = 0; ii < nelem; ii++)
sbuf_printf(sb, "%02hhx", value[ii]);
break;
}
case DATA_TYPE_UINT16_ARRAY:
{
uint16_t *value;
uint_t ii, nelem;
(void) nvpair_value_uint16_array(elem, &value, &nelem);
sbuf_printf(sb, " %s=", nvpair_name(elem));
for (ii = 0; ii < nelem; ii++)
sbuf_printf(sb, "%04hx", value[ii]);
break;
}
case DATA_TYPE_UINT32_ARRAY:
{
uint32_t *value;
uint_t ii, nelem;
(void) nvpair_value_uint32_array(elem, &value, &nelem);
sbuf_printf(sb, " %s=", nvpair_name(elem));
for (ii = 0; ii < nelem; ii++)
sbuf_printf(sb, "%08jx", (uintmax_t)value[ii]);
break;
}
case DATA_TYPE_INT64_ARRAY:
{
int64_t *value;
uint_t ii, nelem;
(void) nvpair_value_int64_array(elem, &value, &nelem);
sbuf_printf(sb, " %s=", nvpair_name(elem));
for (ii = 0; ii < nelem; ii++)
sbuf_printf(sb, "%016lld",
(long long)value[ii]);
break;
}
case DATA_TYPE_UINT64_ARRAY:
{
uint64_t *value;
uint_t ii, nelem;
(void) nvpair_value_uint64_array(elem, &value, &nelem);
sbuf_printf(sb, " %s=", nvpair_name(elem));
for (ii = 0; ii < nelem; ii++)
sbuf_printf(sb, "%016jx", (uintmax_t)value[ii]);
break;
}
case DATA_TYPE_STRING_ARRAY:
{
char **strarr;
uint_t ii, nelem;
(void) nvpair_value_string_array(elem, &strarr, &nelem);
for (ii = 0; ii < nelem; ii++) {
if (strarr[ii] == NULL) {
sbuf_printf(sb, " <NULL>");
continue;
}
sbuf_printf(sb, " %s", strarr[ii]);
if (strcmp(FM_CLASS, strarr[ii]) == 0)
type = strarr[ii];
}
break;
}
case DATA_TYPE_NVLIST:
/* XXX - requires recursing in log_sysevent */
break;
default:
printf("%s: type %d is not implemented\n", __func__,
nvpair_type(elem));
break;
}
}
if (sbuf_finish(sb) != 0) {
sbuf_delete(sb);
return (ENOMEM);
}
if (type == NULL)
type = "";
if (strncmp(type, "ESC_ZFS_", 8) == 0) {
snprintf(typestr, sizeof (typestr), "misc.fs.zfs.%s", type + 8);
type = typestr;
}
devctl_notify("ZFS", "ZFS", type, sbuf_data(sb));
sbuf_delete(sb);
return (0);
}
static void
sysevent_worker(void *arg __unused)
{
zfs_zevent_t *ze;
nvlist_t *event;
uint64_t dropped = 0;
uint64_t dst_size;
int error;
zfs_zevent_init(&ze);
for (;;) {
dst_size = 131072;
dropped = 0;
event = NULL;
error = zfs_zevent_next(ze, &event,
&dst_size, &dropped);
if (error) {
error = zfs_zevent_wait(ze);
if (error == ESHUTDOWN)
break;
} else {
VERIFY(event != NULL);
log_sysevent(event);
nvlist_free(event);
}
}
zfs_zevent_destroy(ze);
kthread_exit();
}
void
ddi_sysevent_init(void)
{
kproc_kthread_add(sysevent_worker, NULL, &system_proc, NULL, 0, 0,
"zfskern", "sysevent");
}