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ras-events.c
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ras-events.c
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/*
* Copyright (C) 2013 Mauro Carvalho Chehab <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/poll.h>
#include <signal.h>
#include <sys/signalfd.h>
#include <linux/version.h>
#include <traceevent/kbuffer.h>
#include <traceevent/event-parse.h>
#include "ras-mc-handler.h"
#include "ras-aer-handler.h"
#include "ras-non-standard-handler.h"
#include "ras-arm-handler.h"
#include "ras-mce-handler.h"
#include "ras-extlog-handler.h"
#include "ras-devlink-handler.h"
#include "ras-diskerror-handler.h"
#include "ras-memory-failure-handler.h"
#include "ras-cxl-handler.h"
#include "ras-record.h"
#include "ras-logger.h"
#include "ras-page-isolation.h"
#include "ras-cpu-isolation.h"
/*
* Polling time, if read() doesn't block. Currently, trace_pipe_raw never
* blocks on read(). So, we need to sleep for a while, to avoid spending
* too much CPU cycles. A fix for it is expected for 3.10.
*/
#define POLLING_TIME 3
/* Test for a little-endian machine */
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define ENDIAN KBUFFER_ENDIAN_LITTLE
#else
#define ENDIAN KBUFFER_ENDIAN_BIG
#endif
extern char *choices_disable;
static int get_debugfs_dir(char *tracing_dir, size_t len)
{
FILE *fp;
char line[MAX_PATH + 1 + 256];
char *p, *type, *dir;
fp = fopen("/proc/mounts", "r");
if (!fp) {
log(ALL, LOG_INFO, "Can't open /proc/mounts");
return errno;
}
do {
if (!fgets(line, sizeof(line), fp))
break;
p = strtok(line, " \t");
if (!p)
break;
dir = strtok(NULL, " \t");
if (!dir)
break;
type = strtok(NULL, " \t");
if (!type)
break;
if (!strcmp(type, "debugfs")) {
fclose(fp);
strncpy(tracing_dir, dir, len - 1);
tracing_dir[len - 1] = '\0';
return 0;
}
} while (1);
fclose(fp);
log(ALL, LOG_INFO, "Can't find debugfs\n");
return ENOENT;
}
static int open_trace(struct ras_events *ras, char *name, int flags)
{
char fname[MAX_PATH + 1];
strcpy(fname, ras->tracing);
strcat(fname, "/");
strcat(fname, name);
return open(fname, flags);
}
static int get_tracing_dir(struct ras_events *ras)
{
char fname[MAX_PATH + 1];
int rc, has_instances = 0;
DIR *dir;
struct dirent *entry;
get_debugfs_dir(ras->debugfs, sizeof(ras->debugfs));
strcpy(fname, ras->debugfs);
strcat(fname, "/tracing");
dir = opendir(fname);
if (!dir)
return -1;
for (entry = readdir(dir); entry; entry = readdir(dir)) {
if (strstr(entry->d_name, "instances")) {
has_instances = 1;
break;
}
}
closedir(dir);
strcpy(ras->tracing, ras->debugfs);
strcat(ras->tracing, "/tracing");
if (has_instances) {
strcat(ras->tracing, "/instances/" TOOL_NAME);
rc = mkdir(ras->tracing, 0700);
if (rc < 0 && errno != EEXIST) {
log(ALL, LOG_INFO,
"Unable to create " TOOL_NAME " instance at %s\n",
ras->tracing);
return -1;
}
}
return 0;
}
static int is_disabled_event(char *group, char *event)
{
char ras_event_name[MAX_PATH + 1];
snprintf(ras_event_name, sizeof(ras_event_name), "%s:%s",
group, event);
if (choices_disable && strlen(choices_disable) != 0 && strstr(choices_disable, ras_event_name)) {
return 1;
}
return 0;
}
/*
* Tracing enable/disable code
*/
static int __toggle_ras_mc_event(struct ras_events *ras,
char *group, char *event, int enable)
{
int fd, rc;
char fname[MAX_PATH + 1];
enable = is_disabled_event(group, event) ? 0 : 1;
snprintf(fname, sizeof(fname), "%s%s:%s\n",
enable ? "" : "!",
group, event);
/* Enable RAS events */
fd = open_trace(ras, "set_event", O_RDWR | O_APPEND);
if (fd < 0) {
log(ALL, LOG_WARNING, "Can't open set_event\n");
return errno;
}
rc = write(fd, fname, strlen(fname));
if (rc < 0) {
log(ALL, LOG_WARNING, "Can't write to set_event\n");
close(fd);
return rc;
}
close(fd);
if (!rc) {
log(ALL, LOG_WARNING, "Nothing was written on set_event\n");
return EIO;
}
log(ALL, LOG_INFO, "%s:%s event %s\n",
group, event,
enable ? "enabled" : "disabled");
return 0;
}
int toggle_ras_mc_event(int enable)
{
struct ras_events *ras;
int rc = 0;
ras = calloc(1, sizeof(*ras));
if (!ras) {
log(TERM, LOG_ERR, "Can't allocate memory for ras struct\n");
return errno;
}
rc = get_tracing_dir(ras);
if (rc < 0) {
log(TERM, LOG_ERR, "Can't locate a mounted debugfs\n");
goto free_ras;
}
rc = __toggle_ras_mc_event(ras, "ras", "mc_event", enable);
#ifdef HAVE_AER
rc |= __toggle_ras_mc_event(ras, "ras", "aer_event", enable);
#endif
#ifdef HAVE_MCE
rc |= __toggle_ras_mc_event(ras, "mce", "mce_record", enable);
#endif
#ifdef HAVE_EXTLOG
rc |= __toggle_ras_mc_event(ras, "ras", "extlog_mem_event", enable);
#endif
#ifdef HAVE_NON_STANDARD
rc |= __toggle_ras_mc_event(ras, "ras", "non_standard_event", enable);
#endif
#ifdef HAVE_ARM
rc |= __toggle_ras_mc_event(ras, "ras", "arm_event", enable);
#endif
#ifdef HAVE_DEVLINK
rc |= __toggle_ras_mc_event(ras, "devlink", "devlink_health_report", enable);
#endif
#ifdef HAVE_DISKERROR
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 18, 0)
rc |= __toggle_ras_mc_event(ras, "block", "block_rq_error", enable);
#else
rc |= __toggle_ras_mc_event(ras, "block", "block_rq_complete", enable);
#endif
#endif
#ifdef HAVE_MEMORY_FAILURE
rc |= __toggle_ras_mc_event(ras, "ras", "memory_failure_event", enable);
#endif
#ifdef HAVE_CXL
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_poison", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_aer_uncorrectable_error", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_aer_correctable_error", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_overflow", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_generic_event", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_general_media", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_dram", enable);
rc |= __toggle_ras_mc_event(ras, "cxl", "cxl_memory_module", enable);
#endif
free_ras:
free(ras);
return rc;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 18, 0)
/*
* Set kernel filter. libtrace doesn't provide an API for setting filters
* in kernel, we have to implement it here.
*/
static int filter_ras_mc_event(struct ras_events *ras, char *group, char *event,
const char *filter_str)
{
int fd, rc;
char fname[MAX_PATH + 1];
snprintf(fname, sizeof(fname), "events/%s/%s/filter", group, event);
fd = open_trace(ras, fname, O_RDWR | O_APPEND);
if (fd < 0) {
log(ALL, LOG_WARNING, "Can't open filter file\n");
return errno;
}
rc = write(fd, filter_str, strlen(filter_str));
if (rc < 0) {
log(ALL, LOG_WARNING, "Can't write to filter file\n");
close(fd);
return rc;
}
close(fd);
if (!rc) {
log(ALL, LOG_WARNING, "Nothing was written on filter file\n");
return EIO;
}
return 0;
}
#endif
/*
* Tracing read code
*/
static int get_pagesize(struct ras_events *ras, struct tep_handle *pevent)
{
int fd, len, page_size = 4096;
char buf[page_size];
fd = open_trace(ras, "events/header_page", O_RDONLY);
if (fd < 0)
return page_size;
len = read(fd, buf, page_size);
if (len <= 0)
goto error;
if (tep_parse_header_page(pevent, buf, len, sizeof(long)))
goto error;
error:
close(fd);
return page_size;
}
static void parse_ras_data(struct pthread_data *pdata, struct kbuffer *kbuf,
void *data, unsigned long long time_stamp)
{
struct tep_record record;
struct trace_seq s;
record.ts = time_stamp;
record.size = kbuffer_event_size(kbuf);
record.data = data;
record.offset = kbuffer_curr_offset(kbuf);
record.cpu = pdata->cpu;
/* note offset is just offset in subbuffer */
record.missed_events = kbuffer_missed_events(kbuf);
record.record_size = kbuffer_curr_size(kbuf);
/* TODO - logging */
trace_seq_init(&s);
tep_print_event(pdata->ras->pevent, &s, &record,
"%16s-%-5d [%03d] %s %6.1000d %s %s",
TEP_PRINT_COMM, TEP_PRINT_PID, TEP_PRINT_CPU,
TEP_PRINT_LATENCY, TEP_PRINT_TIME, TEP_PRINT_NAME,
TEP_PRINT_INFO);
trace_seq_do_printf(&s);
printf("\n");
fflush(stdout);
trace_seq_destroy(&s);
}
static int get_num_cpus(struct ras_events *ras)
{
return sysconf(_SC_NPROCESSORS_ONLN);
#if 0
char fname[MAX_PATH + 1];
int num_cpus = 0;
DIR *dir;
struct dirent *entry;
strcpy(fname, ras->debugfs);
strcat(fname, "/tracing/per_cpu/");
dir = opendir(fname);
if (!dir)
return -1;
for (entry = readdir(dir); entry; entry = readdir(dir)) {
if (strstr(entry->d_name, "cpu"))
num_cpus++;
}
closedir(dir);
return num_cpus;
#endif
}
static int set_buffer_percent(struct ras_events *ras, int percent)
{
char buf[16];
ssize_t size;
int res = 0;
int fd;
fd = open_trace(ras, "buffer_percent", O_WRONLY);
if (fd >= 0) {
/* For the backward compatibility to the old kernels, do not return
* if fail to set the buffer_percent.
*/
snprintf(buf, sizeof(buf), "%d", percent);
size = write(fd, buf, strlen(buf));
if (size <= 0) {
log(TERM, LOG_WARNING, "can't write to buffer_percent\n");
res = -1;
}
close(fd);
} else {
log(TERM, LOG_WARNING, "Can't open buffer_percent\n");
res = -1;
}
return res;
}
static int read_ras_event_all_cpus(struct pthread_data *pdata,
unsigned int n_cpus)
{
ssize_t size;
unsigned long long time_stamp;
void *data;
int ready, i, count_nready;
struct kbuffer *kbuf;
void *page;
struct pollfd fds[n_cpus + 1];
struct signalfd_siginfo fdsiginfo;
sigset_t mask;
int warnonce[n_cpus];
char pipe_raw[PATH_MAX];
int legacy_kernel = 0;
#if 0
int need_sleep = 0;
#endif
memset(&warnonce, 0, sizeof(warnonce));
page = malloc(pdata[0].ras->page_size);
if (!page) {
log(TERM, LOG_ERR, "Can't allocate page\n");
return -ENOMEM;
}
kbuf = kbuffer_alloc(KBUFFER_LSIZE_8, ENDIAN);
if (!kbuf) {
log(TERM, LOG_ERR, "Can't allocate kbuf\n");
free(page);
return -ENOMEM;
}
/* Fix for poll() on the per_cpu trace_pipe and trace_pipe_raw blocks
* indefinitely with the default buffer_percent in the kernel trace system,
* which is introduced by the following change in the kernel.
* https://lore.kernel.org/all/[email protected]/T/#u.
* Set buffer_percent to 0 so that poll() will return immediately
* when the trace data is available in the ras per_cpu trace pipe_raw
*/
if (set_buffer_percent(pdata[0].ras, 0))
log(TERM, LOG_WARNING, "Set buffer_percent failed\n");
for (i = 0; i < (n_cpus + 1); i++)
fds[i].fd = -1;
for (i = 0; i < n_cpus; i++) {
fds[i].events = POLLIN;
/* FIXME: use select to open for all CPUs */
snprintf(pipe_raw, sizeof(pipe_raw),
"per_cpu/cpu%d/trace_pipe_raw", i);
fds[i].fd = open_trace(pdata[0].ras, pipe_raw, O_RDONLY);
if (fds[i].fd < 0) {
log(TERM, LOG_ERR, "Can't open trace_pipe_raw\n");
goto error;
}
}
sigemptyset(&mask);
sigaddset(&mask, SIGINT);
sigaddset(&mask, SIGTERM);
sigaddset(&mask, SIGHUP);
sigaddset(&mask, SIGQUIT);
if (sigprocmask(SIG_BLOCK, &mask, NULL) == -1)
log(TERM, LOG_WARNING, "sigprocmask\n");
fds[n_cpus].events = POLLIN;
fds[n_cpus].fd = signalfd(-1, &mask, 0);
if (fds[n_cpus].fd < 0) {
log(TERM, LOG_WARNING, "signalfd\n");
goto error;
}
log(TERM, LOG_INFO, "Listening to events for cpus 0 to %d\n", n_cpus - 1);
if (pdata[0].ras->record_events) {
if (ras_mc_event_opendb(pdata[0].cpu, pdata[0].ras))
goto error;
#ifdef HAVE_NON_STANDARD
if (ras_ns_add_vendor_tables(pdata[0].ras))
log(TERM, LOG_ERR, "Can't add vendor table\n");
#endif
}
do {
ready = poll(fds, (n_cpus + 1), -1);
if (ready < 0) {
log(TERM, LOG_WARNING, "poll\n");
}
/* check for the signal */
if (fds[n_cpus].revents & POLLIN) {
size = read(fds[n_cpus].fd, &fdsiginfo,
sizeof(struct signalfd_siginfo));
if (size != sizeof(struct signalfd_siginfo))
log(TERM, LOG_WARNING, "signalfd read\n");
if (fdsiginfo.ssi_signo == SIGINT ||
fdsiginfo.ssi_signo == SIGTERM ||
fdsiginfo.ssi_signo == SIGHUP ||
fdsiginfo.ssi_signo == SIGQUIT) {
log(TERM, LOG_INFO, "Received signal=%d\n",
fdsiginfo.ssi_signo);
goto cleanup;
} else {
log(TERM, LOG_INFO,
"Received unexpected signal=%d\n",
fdsiginfo.ssi_signo);
}
}
count_nready = 0;
for (i = 0; i < n_cpus; i++) {
if (fds[i].revents & POLLERR) {
if (!warnonce[i]) {
log(TERM, LOG_INFO,
"Error on CPU %i\n", i);
warnonce[i]++;
#if 0
need_sleep = 1;
#endif
}
}
if (!(fds[i].revents & POLLIN)) {
count_nready++;
continue;
}
size = read(fds[i].fd, page, pdata[i].ras->page_size);
if (size < 0) {
log(TERM, LOG_WARNING, "read\n");
goto cleanup;
} else if (size > 0) {
kbuffer_load_subbuffer(kbuf, page);
while ((data = kbuffer_read_event(kbuf, &time_stamp))) {
if (kbuffer_curr_size(kbuf) < 0) {
log(TERM, LOG_ERR, "invalid kbuf data, discard\n");
break;
}
parse_ras_data(&pdata[i],
kbuf, data, time_stamp);
/* increment to read next event */
kbuffer_next_event(kbuf, NULL);
}
} else {
count_nready++;
}
}
#if 0
if (need_sleep)
sleep(POLLING_TIME);
#else
/*
* If we enable fallback mode, it will always be used, as
* poll is still not working fine, IMHO
*/
if (count_nready == n_cpus) {
/* Should only happen with legacy kernels */
legacy_kernel = 1;
break;
}
#endif
} while (1);
/* poll() is not supported. We need to fallback to the old way */
log(TERM, LOG_INFO,
"Old kernel detected. Stop listening and fall back to pthread way.\n");
cleanup:
if (pdata[0].ras->record_events) {
#ifdef HAVE_NON_STANDARD
ras_ns_finalize_vendor_tables();
#endif
ras_mc_event_closedb(pdata[0].cpu, pdata[0].ras);
}
error:
kbuffer_free(kbuf);
free(page);
sigprocmask(SIG_UNBLOCK, &mask, NULL);
for (i = 0; i < (n_cpus + 1); i++) {
if (fds[i].fd > 0)
close(fds[i].fd);
}
if (legacy_kernel)
return -255;
else
return -1;
}
static int read_ras_event(int fd,
struct pthread_data *pdata,
struct kbuffer *kbuf,
void *page)
{
int size;
unsigned long long time_stamp;
void *data;
/*
* read() never blocks. We can't call poll() here, as it is
* not supported on kernels below 3.10. So, the better is to just
* sleep for a while, to avoid eating too much CPU here.
*/
do {
size = read(fd, page, pdata->ras->page_size);
if (size < 0) {
log(TERM, LOG_WARNING, "read\n");
return -1;
} else if (size > 0) {
kbuffer_load_subbuffer(kbuf, page);
while ((data = kbuffer_read_event(kbuf, &time_stamp))) {
parse_ras_data(pdata, kbuf, data, time_stamp);
/* increment to read next event */
kbuffer_next_event(kbuf, NULL);
}
} else {
sleep(POLLING_TIME);
}
} while (1);
}
static void *handle_ras_events_cpu(void *priv)
{
int fd;
struct kbuffer *kbuf;
void *page;
char pipe_raw[PATH_MAX];
struct pthread_data *pdata = priv;
page = malloc(pdata->ras->page_size);
if (!page) {
log(TERM, LOG_ERR, "Can't allocate page\n");
return NULL;
}
kbuf = kbuffer_alloc(KBUFFER_LSIZE_8, ENDIAN);
if (!kbuf) {
log(TERM, LOG_ERR, "Can't allocate kbuf");
free(page);
return NULL;
}
/* FIXME: use select to open for all CPUs */
snprintf(pipe_raw, sizeof(pipe_raw),
"per_cpu/cpu%d/trace_pipe_raw",
pdata->cpu);
fd = open_trace(pdata->ras, pipe_raw, O_RDONLY);
if (fd < 0) {
log(TERM, LOG_ERR, "Can't open trace_pipe_raw\n");
kbuffer_free(kbuf);
free(page);
return NULL;
}
log(TERM, LOG_INFO, "Listening to events on cpu %d\n", pdata->cpu);
if (pdata->ras->record_events) {
pthread_mutex_lock(&pdata->ras->db_lock);
if (ras_mc_event_opendb(pdata->cpu, pdata->ras)) {
pthread_mutex_unlock(&pdata->ras->db_lock);
log(TERM, LOG_ERR, "Can't open database\n");
close(fd);
kbuffer_free(kbuf);
free(page);
return 0;
}
#ifdef HAVE_NON_STANDARD
if (ras_ns_add_vendor_tables(pdata->ras))
log(TERM, LOG_ERR, "Can't add vendor table\n");
#endif
pthread_mutex_unlock(&pdata->ras->db_lock);
}
read_ras_event(fd, pdata, kbuf, page);
if (pdata->ras->record_events) {
pthread_mutex_lock(&pdata->ras->db_lock);
#ifdef HAVE_NON_STANDARD
ras_ns_finalize_vendor_tables();
#endif
ras_mc_event_closedb(pdata->cpu, pdata->ras);
pthread_mutex_unlock(&pdata->ras->db_lock);
}
close(fd);
kbuffer_free(kbuf);
free(page);
return NULL;
}
#define UPTIME "uptime"
static int select_tracing_timestamp(struct ras_events *ras)
{
FILE *fp;
int fd, rc;
time_t uptime, now;
size_t size;
unsigned int j1;
char buf[4096];
/* Check if uptime is supported (kernel 3.10-rc1 or upper) */
fd = open_trace(ras, "trace_clock", O_RDONLY);
if (fd < 0) {
log(TERM, LOG_ERR, "Can't open trace_clock\n");
return -1;
}
size = read(fd, buf, sizeof(buf));
close(fd);
if (!size) {
log(TERM, LOG_ERR, "trace_clock is empty!\n");
return -1;
}
if (!strstr(buf, UPTIME)) {
log(TERM, LOG_INFO, "Kernel doesn't support uptime clock\n");
return 0;
}
/* Select uptime tracing */
fd = open_trace(ras, "trace_clock", O_WRONLY);
if (!fd) {
log(TERM, LOG_ERR,
"Kernel didn't allow writing to trace_clock\n");
return 0;
}
rc = write(fd, UPTIME, sizeof(UPTIME));
close(fd);
if (rc < 0) {
log(TERM, LOG_ERR,
"Kernel didn't allow selecting uptime on trace_clock\n");
return 0;
}
/* Reference uptime with localtime */
fp = fopen("/proc/uptime", "r");
if (!fp) {
log(TERM, LOG_ERR,
"Couldn't read from /proc/uptime\n");
return 0;
}
rc = fscanf(fp, "%zu.%u ", &uptime, &j1);
fclose(fp);
if (rc <= 0) {
log(TERM, LOG_ERR, "Can't parse /proc/uptime!\n");
return -1;
}
now = time(NULL);
ras->use_uptime = 1;
ras->uptime_diff = now - uptime;
return 0;
}
static int add_event_handler(struct ras_events *ras, struct tep_handle *pevent,
unsigned int page_size, char *group, char *event,
tep_event_handler_func func, char *filter_str, int id)
{
int fd, size, rc;
char *page, fname[MAX_PATH + 1];
struct tep_event_filter *filter = NULL;
snprintf(fname, sizeof(fname), "events/%s/%s/format", group, event);
fd = open_trace(ras, fname, O_RDONLY);
if (fd < 0) {
log(TERM, LOG_ERR,
"Can't get %s:%s traces. Perhaps this feature is not supported on your system.\n",
group, event);
return errno;
}
page = malloc(page_size);
if (!page) {
log(TERM, LOG_ERR, "Can't allocate page to read %s:%s format\n",
group, event);
rc = errno;
close(fd);
return rc;
}
size = read(fd, page, page_size);
close(fd);
if (size < 0) {
log(TERM, LOG_ERR, "Can't get arch page size\n");
free(page);
return size;
}
/* Registers the special event handlers */
rc = tep_register_event_handler(pevent, -1, group, event, func, ras);
if (rc == TEP_ERRNO__MEM_ALLOC_FAILED) {
log(TERM, LOG_ERR, "Can't register event handler for %s:%s\n",
group, event);
free(page);
return EINVAL;
}
rc = tep_parse_event(pevent, page, size, group);
if (rc) {
log(TERM, LOG_ERR, "Can't parse event %s:%s\n", group, event);
free(page);
return EINVAL;
}
if (filter_str) {
char error[255];
filter = tep_filter_alloc(pevent);
if (!filter) {
log(TERM, LOG_ERR,
"Failed to allocate filter for %s/%s.\n", group, event);
free(page);
return EINVAL;
}
rc = tep_filter_add_filter_str(filter, filter_str);
if (rc < 0) {
tep_filter_strerror(filter, rc, error, sizeof(error));
log(TERM, LOG_ERR,
"Failed to install filter for %s/%s: %s\n", group, event, error);
tep_filter_free(filter);
free(page);
return rc;
}
}
ras->filters[id] = filter;
if (is_disabled_event(group, event)) {
log(ALL, LOG_INFO, "Disabled %s:%s tracing from config\n",
group, event);
return -EINVAL;
}
/* Enable RAS events */
rc = __toggle_ras_mc_event(ras, group, event, 1);
free(page);
if (rc < 0) {
log(TERM, LOG_ERR, "Can't enable %s:%s tracing\n",
group, event);
return EINVAL;
}
log(ALL, LOG_INFO, "Enabled event %s:%s\n", group, event);
return 0;
}
int handle_ras_events(int record_events)
{
int rc, page_size, i;
int num_events = 0;
unsigned int cpus;
struct tep_handle *pevent = NULL;
struct pthread_data *data = NULL;
struct ras_events *ras = NULL;
#ifdef HAVE_DEVLINK
char *filter_str = NULL;
#endif
ras = calloc(1, sizeof(*ras));
if (!ras) {
log(TERM, LOG_ERR, "Can't allocate memory for ras struct\n");
return errno;
}
rc = get_tracing_dir(ras);
if (rc < 0) {
log(TERM, LOG_ERR, "Can't locate a mounted debugfs\n");
goto err;
}
rc = select_tracing_timestamp(ras);
if (rc < 0) {
log(TERM, LOG_ERR, "Can't select a timestamp for tracing\n");
goto err;
}
pevent = tep_alloc();
if (!pevent) {
log(TERM, LOG_ERR, "Can't allocate pevent\n");
rc = errno;
goto err;
}
page_size = get_pagesize(ras, pevent);
ras->pevent = pevent;
ras->page_size = page_size;
ras->record_events = record_events;
#ifdef HAVE_MEMORY_CE_PFA
/* FIXME: enable memory isolation unconditionally */
ras_page_account_init();
#endif
rc = add_event_handler(ras, pevent, page_size, "ras", "mc_event",
ras_mc_event_handler, NULL, MC_EVENT);
if (!rc)
num_events++;
else if (rc != -EINVAL)
log(ALL, LOG_ERR, "Can't get traces from %s:%s\n",
"ras", "mc_event");
#ifdef HAVE_AER
rc = add_event_handler(ras, pevent, page_size, "ras", "aer_event",
ras_aer_event_handler, NULL, AER_EVENT);
if (!rc)
num_events++;
else if (rc != -EINVAL)
log(ALL, LOG_ERR, "Can't get traces from %s:%s\n",
"ras", "aer_event");
#endif
#ifdef HAVE_NON_STANDARD
rc = add_event_handler(ras, pevent, page_size, "ras", "non_standard_event",
ras_non_standard_event_handler, NULL, NON_STANDARD_EVENT);
if (!rc)
num_events++;
else if (rc != -EINVAL)
log(ALL, LOG_ERR, "Can't get traces from %s:%s\n",
"ras", "non_standard_event");
#endif
#ifdef HAVE_ARM
rc = add_event_handler(ras, pevent, page_size, "ras", "arm_event",
ras_arm_event_handler, NULL, ARM_EVENT);
if (!rc)
num_events++;
else if (rc != -EINVAL)
log(ALL, LOG_ERR, "Can't get traces from %s:%s\n",
"ras", "arm_event");
#endif
cpus = get_num_cpus(ras);
#ifdef HAVE_CPU_FAULT_ISOLATION
ras_cpu_isolation_init(cpus);
#endif
#ifdef HAVE_MCE
rc = register_mce_handler(ras, cpus);
if (rc)
log(ALL, LOG_INFO, "Can't register mce handler\n");
if (ras->mce_priv) {
rc = add_event_handler(ras, pevent, page_size,
"mce", "mce_record",
ras_mce_event_handler, NULL, MCE_EVENT);
if (!rc)
num_events++;
else
log(ALL, LOG_ERR, "Can't get traces from %s:%s\n",
"mce", "mce_record");
}
#endif
#ifdef HAVE_EXTLOG
rc = add_event_handler(ras, pevent, page_size, "ras", "extlog_mem_event",
ras_extlog_mem_event_handler, NULL, EXTLOG_EVENT);
if (!rc) {
/* tell kernel we are listening, so don't printk to console */
(void)open("/sys/kernel/debug/ras/daemon_active", 0);
num_events++;
} else if (rc != -EINVAL)
log(ALL, LOG_ERR, "Can't get traces from %s:%s\n",
"ras", "extlog_mem_event");
#endif
#ifdef HAVE_DEVLINK
rc = add_event_handler(ras, pevent, page_size, "net",