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/* Copyright (C) 2004,2005,2006 Andi Kleen, SuSE Labs.
Copyright (C) 2008 Intel Corporation
Authors: Andi Kleen, Ying Huang
Decode IA32/x86-64 machine check events in /dev/mcelog.
mcelog 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; version
2.
mcelog 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 find a copy of v2 of the GNU General Public License somewhere
on your Linux system; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#define _GNU_SOURCE 1
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <asm/types.h>
#include <asm/ioctls.h>
#include <linux/limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <syslog.h>
#include <ctype.h>
#include <poll.h>
#include <time.h>
#include <getopt.h>
#include <errno.h>
#include <stddef.h>
#include <assert.h>
#include <signal.h>
#include <pwd.h>
#include "mcelog.h"
#include "paths.h"
#include "k8.h"
#include "intel.h"
#include "p4.h"
#include "dmi.h"
#include "dimm.h"
#include "tsc.h"
#include "version.h"
#include "config.h"
#include "diskdb.h"
#include "memutil.h"
#include "eventloop.h"
#include "memdb.h"
#include "server.h"
#include "trigger.h"
#include "client.h"
#include "msg.h"
#include "yellow.h"
#include "page.h"
enum cputype cputype = CPU_GENERIC;
char *logfn = LOG_DEV_FILENAME;
int ignore_nodev;
int filter_bogus = 1;
int cpu_forced;
static double cpumhz;
static int cpumhz_forced;
int ascii_mode;
int dump_raw_ascii;
int daemon_mode;
static char *inputfile;
char *processor_flags;
static int foreground;
int filter_memory_errors;
static struct config_cred runcred = { .uid = -1U, .gid = -1U };
static int numerrors;
static char pidfile_default[] = PID_FILE;
static char logfile_default[] = LOG_FILE;
static char *pidfile = pidfile_default;
static char *logfile;
static int debug_numerrors;
static void check_cpu(void);
static void disclaimer(void)
{
Wprintf("Hardware event. This is not a software error.\n");
}
static char *extended_bankname(unsigned bank)
{
static char buf[64];
switch (bank) {
case MCE_THERMAL_BANK:
return "THERMAL EVENT";
case MCE_TIMEOUT_BANK:
return "Timeout waiting for exception on other CPUs";
case K8_MCE_THRESHOLD_BASE ... K8_MCE_THRESHOLD_TOP:
return k8_bank_name(bank);
/* add more extended banks here */
default:
sprintf(buf, "Undecoded extended event %x", bank);
return buf;
}
}
static char *bankname(unsigned bank)
{
static char numeric[64];
if (bank >= MCE_EXTENDED_BANK)
return extended_bankname(bank);
switch (cputype) {
case CPU_K8:
return k8_bank_name(bank);
CASE_INTEL_CPUS:
return intel_bank_name(bank);
/* add banks of other cpu types here */
default:
sprintf(numeric, "BANK %d", bank);
return numeric;
}
}
static void resolveaddr(unsigned long long addr)
{
if (addr && do_dmi && dmi_forced)
dmi_decodeaddr(addr);
/* Should check for PCI resources here too */
}
static int mce_filter(struct mce *m, unsigned recordlen)
{
if (!filter_bogus)
return 1;
/* Filter out known broken MCEs */
switch (cputype) {
case CPU_K8:
return mce_filter_k8(m);
/* add more buggy CPUs here */
CASE_INTEL_CPUS:
return mce_filter_intel(m, recordlen);
default:
case CPU_GENERIC:
return 1;
}
}
static void print_tsc(int cpunum, __u64 tsc, unsigned long time)
{
int ret = -1;
char *buf = NULL;
if (cpumhz_forced)
ret = decode_tsc_forced(&buf, cpumhz, tsc);
else if (!time)
ret = decode_tsc_current(&buf, cpunum, cputype, cpumhz, tsc);
Wprintf("TSC %llx %s", tsc, ret >= 0 && buf ? buf : "");
free(buf);
}
struct cpuid1 {
unsigned stepping : 4;
unsigned model : 4;
unsigned family : 4;
unsigned type : 2;
unsigned res1 : 2;
unsigned ext_model : 4;
unsigned ext_family : 8;
unsigned res2 : 4;
};
static void parse_cpuid(u32 cpuid, u32 *family, u32 *model)
{
union {
struct cpuid1 c;
u32 v;
} c;
/* Algorithm from IA32 SDM 2a 3-191 */
c.v = cpuid;
*family = c.c.family;
if (*family == 0xf)
*family += c.c.ext_family;
*model = c.c.model;
if (*family == 6 || *family == 0xf)
*model += c.c.ext_model << 4;
}
static char *cputype_name[] = {
[CPU_GENERIC] = "generic CPU",
[CPU_P6OLD] = "Intel PPro/P2/P3/old Xeon",
[CPU_CORE2] = "Intel Core", /* 65nm and 45nm */
[CPU_K8] = "AMD K8 and derivates",
[CPU_P4] = "Intel P4",
[CPU_NEHALEM] = "Intel Xeon 5500 series / Core i3/5/7 (\"Nehalem/Westmere\")",
[CPU_DUNNINGTON] = "Intel Xeon 7400 series",
[CPU_TULSA] = "Intel Xeon 7100 series",
[CPU_INTEL] = "Intel generic architectural MCA",
[CPU_XEON75XX] = "Intel Xeon 7500 series",
[CPU_SANDY_BRIDGE] = "Sandy Bridge", /* Fill in better name */
[CPU_SANDY_BRIDGE_EP] = "Sandy Bridge EP", /* Fill in better name */
};
static struct config_choice cpu_choices[] = {
{ "generic", CPU_GENERIC },
{ "p6old", CPU_P6OLD },
{ "core2", CPU_CORE2 },
{ "k8", CPU_K8 },
{ "p4", CPU_P4 },
{ "dunnington", CPU_DUNNINGTON },
{ "xeon74xx", CPU_DUNNINGTON },
{ "xeon7400", CPU_DUNNINGTON },
{ "xeon5500", CPU_NEHALEM },
{ "xeon5200", CPU_CORE2 },
{ "xeon5000", CPU_P4 },
{ "xeon5100", CPU_CORE2 },
{ "xeon3100", CPU_CORE2 },
{ "xeon3200", CPU_CORE2 },
{ "core_i7", CPU_NEHALEM },
{ "core_i5", CPU_NEHALEM },
{ "core_i3", CPU_NEHALEM },
{ "nehalem", CPU_NEHALEM },
{ "westmere", CPU_NEHALEM },
{ "xeon71xx", CPU_TULSA },
{ "xeon7100", CPU_TULSA },
{ "tulsa", CPU_TULSA },
{ "intel", CPU_INTEL },
{ "xeon75xx", CPU_XEON75XX },
{ "xeon7500", CPU_XEON75XX },
{ "xeon7200", CPU_CORE2 },
{ "xeon7100", CPU_P4 },
{ "sandybridge", CPU_SANDY_BRIDGE }, /* Fill in better name */
{ "sandybridge-ep", CPU_SANDY_BRIDGE_EP }, /* Fill in better name */
{}
};
static void print_cputypes(void)
{
struct config_choice *c;
fprintf(stderr, "Valid CPUs:");
for (c = cpu_choices; c->name; c++)
fprintf(stderr, " %s", c->name);
fputc('\n', stderr);
}
static enum cputype lookup_cputype(char *name)
{
struct config_choice *c;
for (c = cpu_choices; c->name; c++) {
if (!strcasecmp(name, c->name))
return c->val;
}
fprintf(stderr, "Unknown CPU type `%s' specified\n", name);
print_cputypes();
exit(1);
}
static char *cpuvendor_name(u32 cpuvendor)
{
static char *vendor[] = {
[0] = "Intel",
[1] = "Cyrix",
[2] = "AMD",
[3] = "UMC",
[4] = "vendor 4",
[5] = "Centaur",
[6] = "vendor 6",
[7] = "Transmeta",
[8] = "NSC"
};
return (cpuvendor < NELE(vendor)) ? vendor[cpuvendor] : "Unknown vendor";
}
static enum cputype setup_cpuid(u32 cpuvendor, u32 cpuid)
{
u32 family, model;
parse_cpuid(cpuid, &family, &model);
switch (cpuvendor) {
case X86_VENDOR_INTEL:
return select_intel_cputype(family, model);
case X86_VENDOR_AMD:
if (family >= 15 && family <= 17)
return CPU_K8;
/* FALL THROUGH */
default:
Eprintf("Unknown CPU type vendor %u family %x model %x",
cpuvendor, family, model);
return CPU_GENERIC;
}
}
static void mce_cpuid(struct mce *m)
{
static int warned;
if (m->cpuid) {
enum cputype t = setup_cpuid(m->cpuvendor, m->cpuid);
if (!cpu_forced)
cputype = t;
else if (t != cputype && t != CPU_GENERIC && !warned) {
Eprintf("Forced cputype %s does not match cpu type %s from mcelog\n",
cputype_name[cputype],
cputype_name[t]);
warned = 1;
}
} else if (cputype == CPU_GENERIC && !cpu_forced) {
check_cpu();
}
}
static void mce_prepare(struct mce *m)
{
mce_cpuid(m);
if (!m->time)
m->time = time(NULL);
}
static void dump_mce(struct mce *m, unsigned recordlen)
{
int n;
int ismemerr = 0;
unsigned cpu = m->extcpu ? m->extcpu : m->cpu;
/* should not happen */
if (!m->finished)
Wprintf("not finished?\n");
Wprintf("CPU %d %s ", cpu, bankname(m->bank));
if (m->tsc)
print_tsc(cpu, m->tsc, m->time);
Wprintf("\n");
if (m->ip)
Wprintf("RIP%s %02x:%llx\n",
!(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
m->cs, m->ip);
n = 0;
if (m->status & MCI_STATUS_MISCV)
n += Wprintf("MISC %llx ", m->misc);
if (m->status & MCI_STATUS_ADDRV)
n += Wprintf("ADDR %llx ", m->addr);
if (n > 0)
Wprintf("\n");
if (m->time) {
time_t t = m->time;
Wprintf("TIME %llu %s", m->time, ctime(&t));
}
switch (cputype) {
case CPU_K8:
decode_k8_mc(m, &ismemerr);
break;
CASE_INTEL_CPUS:
decode_intel_mc(m, cputype, &ismemerr, recordlen);
break;
/* add handlers for other CPUs here */
default:
break;
}
/* decode all status bits here */
Wprintf("STATUS %llx MCGSTATUS %llx\n", m->status, m->mcgstatus);
n = 0;
if (recordlen >= offsetof(struct mce, cpuid) && m->mcgcap)
n += Wprintf("MCGCAP %llx ", m->mcgcap);
if (recordlen >= offsetof(struct mce, apicid))
n += Wprintf("APICID %x ", m->apicid);
if (recordlen >= offsetof(struct mce, socketid))
n += Wprintf("SOCKETID %x ", m->socketid);
if (n > 0)
Wprintf("\n");
if (recordlen >= offsetof(struct mce, cpuid) && m->cpuid) {
u32 fam, mod;
parse_cpuid(m->cpuid, &fam, &mod);
Wprintf("CPUID Vendor %s Family %u Model %u\n",
cpuvendor_name(m->cpuvendor),
fam,
mod);
}
resolveaddr(m->addr);
if (!ascii_mode && ismemerr && (m->status & MCI_STATUS_ADDRV)) {
diskdb_resolve_addr(m->addr);
}
}
static void dump_mce_raw_ascii(struct mce *m, unsigned recordlen)
{
/* should not happen */
if (!m->finished)
Wprintf("not finished?\n");
Wprintf("CPU %u\n", m->extcpu ? m->extcpu : m->cpu);
Wprintf("BANK %d\n", m->bank);
Wprintf("TSC %#llx\n", m->tsc);
Wprintf("RIP %#02x:%#llx\n", m->cs, m->ip);
Wprintf("MISC %#llx\n", m->misc);
Wprintf("ADDR %#llx\n", m->addr);
Wprintf("STATUS %#llx\n", m->status);
Wprintf("MCGSTATUS %#llx\n", m->mcgstatus);
if (recordlen >= offsetof(struct mce, cpuid))
Wprintf("PROCESSOR %u:%#x\n", m->cpuvendor, m->cpuid);
#define CPRINT(str, field) \
if (recordlen >= offsetof(struct mce, field)) \
Wprintf(str "\n", m->field)
CPRINT("TIME %llu", time);
CPRINT("SOCKETID %u", socketid);
CPRINT("APICID %u", apicid);
CPRINT("MCGCAP %#llx", mcgcap);
#undef CPRINT
Wprintf("\n");
}
void check_cpu(void)
{
enum {
VENDOR = 1,
FAMILY = 2,
MODEL = 4,
MHZ = 8,
FLAGS = 16,
ALL = 0x1f
} seen = 0;
FILE *f;
static int checked;
if (checked)
return;
checked = 1;
f = fopen("/proc/cpuinfo","r");
if (f != NULL) {
int family = 0;
int model = 0;
char vendor[64] = { 0 };
char *line = NULL;
size_t linelen = 0;
double mhz;
while (getdelim(&line, &linelen, '\n', f) > 0 && seen != ALL) {
if (sscanf(line, "vendor_id : %63[^\n]", vendor) == 1)
seen |= VENDOR;
if (sscanf(line, "cpu family : %d", &family) == 1)
seen |= FAMILY;
if (sscanf(line, "model : %d", &model) == 1)
seen |= MODEL;
/* We use only Mhz of the first CPU, assuming they are the same
(there are more sanity checks later to make this not as wrong
as it sounds) */
if (sscanf(line, "cpu MHz : %lf", &mhz) == 1) {
if (!cpumhz_forced)
cpumhz = mhz;
seen |= MHZ;
}
if (!strncmp(line, "flags", 5) && isspace(line[6])) {
processor_flags = line;
line = NULL;
linelen = 0;
seen |= FLAGS;
}
}
if (seen == ALL) {
if (cpu_forced)
;
else if (!strcmp(vendor,"AuthenticAMD") &&
(family == 15 || family == 16 || family == 17))
cputype = CPU_K8;
else if (!strcmp(vendor,"GenuineIntel"))
cputype = select_intel_cputype(family, model);
/* Add checks for other CPUs here */
} else {
Eprintf("warning: Cannot parse /proc/cpuinfo\n");
}
fclose(f);
free(line);
} else
Eprintf("warning: Cannot open /proc/cpuinfo\n");
}
static char *skipspace(char *s)
{
while (isspace(*s))
++s;
return s;
}
static char *skipgunk(char *s)
{
s = skipspace(s);
if (*s == '<') {
s += strcspn(s, ">");
if (*s == '>')
++s;
}
s = skipspace(s);
if (*s == '[') {
s += strcspn(s, "]");
if (*s == ']')
++s;
}
return skipspace(s);
}
static void dump_mce_final(struct mce *m, char *symbol, int missing, int recordlen,
int dseen)
{
m->finished = 1;
if (!dump_raw_ascii) {
if (!dseen)
disclaimer();
dump_mce(m, recordlen);
if (symbol[0])
Wprintf("RIP: %s\n", symbol);
if (missing)
Wprintf("(Fields were incomplete)\n");
} else
dump_mce_raw_ascii(m, recordlen);
flushlog();
}
#define FIELD(f) \
if (recordlen < endof_field(struct mce, f)) \
recordlen = endof_field(struct mce, f)
/* Decode ASCII input for fatal messages */
static void decodefatal(FILE *inf)
{
struct mce m;
char *line = NULL;
size_t linelen = 0;
int missing;
char symbol[100];
int data;
int next;
char *s = NULL;
unsigned cpuvendor;
unsigned recordlen;
int disclaimer_seen;
ascii_mode = 1;
if (do_dmi && dmi_forced)
Wprintf(
"WARNING: with --dmi mcelog --ascii must run on the same machine with the\n"
" same BIOS/memory configuration as where the machine check occurred.\n");
restart:
missing = 0;
data = 0;
next = 0;
disclaimer_seen = 0;
recordlen = 0;
memset(&m, 0, sizeof(struct mce));
symbol[0] = '\0';
while (next > 0 || getdelim(&line, &linelen, '\n', inf) > 0) {
int n = 0;
s = next > 0 ? s + next : line;
s = skipgunk(s);
next = 0;
if (!strncmp(s, "CPU", 3)) {
unsigned cpu = 0, bank = 0;
n = sscanf(s,
"CPU %u: Machine Check Exception: %16Lx Bank %d: %016Lx%n",
&cpu,
&m.mcgstatus,
&bank,
&m.status,
&next);
if (n == 1) {
n = sscanf(s, "CPU %u BANK %u%n", &cpu, &bank,
&next);
if (n != 2)
n = sscanf(s, "CPU %u %u%n", &cpu,
&bank, &next);
m.cpu = cpu;
if (n < 2)
missing++;
else {
m.bank = bank;
FIELD(bank);
}
} else if (n <= 0) {
missing++;
} else if (n > 1) {
FIELD(mcgstatus);
m.cpu = cpu;
if (n > 2) {
m.bank = bank;
FIELD(bank);
} else if (n > 3)
FIELD(status);
if (n < 4)
missing++;
}
}
else if (!strncmp(s, "STATUS", 6)) {
if ((n = sscanf(s,"STATUS %llx%n", &m.status, &next)) < 1)
missing++;
else
FIELD(status);
}
else if (!strncmp(s, "MCGSTATUS", 6)) {
if ((n = sscanf(s,"MCGSTATUS %llx%n", &m.mcgstatus, &next)) < 1)
missing++;
else
FIELD(mcgstatus);
}
else if (!strncmp(s, "RIP", 3)) {
unsigned cs = 0;
if (!strncmp(s, "RIP !INEXACT!", 13))
s += 13;
else
s += 3;
n = sscanf(s, "%02x:<%016Lx> {%100s}%n",
&cs,
&m.ip,
symbol, &next);
m.cs = cs;
if (n < 2)
missing++;
else
FIELD(ip);
}
else if (!strncmp(s, "TSC",3)) {
if ((n = sscanf(s, "TSC %llx%n", &m.tsc, &next)) < 1)
missing++;
else
FIELD(tsc);
}
else if (!strncmp(s, "ADDR",4)) {
if ((n = sscanf(s, "ADDR %llx%n", &m.addr, &next)) < 1)
missing++;
else
FIELD(addr);
}
else if (!strncmp(s, "MISC",4)) {
if ((n = sscanf(s, "MISC %llx%n", &m.misc, &next)) < 1)
missing++;
else
FIELD(misc);
}
else if (!strncmp(s, "PROCESSOR", 9)) {
if ((n = sscanf(s, "PROCESSOR %u:%x%n", &cpuvendor, &m.cpuid, &next)) < 2)
missing++;
else {
m.cpuvendor = cpuvendor;
FIELD(cpuid);
FIELD(cpuvendor);
}
}
else if (!strncmp(s, "TIME", 4)) {
if ((n = sscanf(s, "TIME %llu%n", &m.time, &next)) < 1)
missing++;
else
FIELD(time);
}
else if (!strncmp(s, "MCGCAP", 6)) {
if ((n = sscanf(s, "MCGCAP %llx%n", &m.mcgcap, &next)) != 1)
missing++;
else
FIELD(mcgcap);
}
else if (!strncmp(s, "APICID", 6)) {
if ((n = sscanf(s, "APICID %x%n", &m.apicid, &next)) != 1)
missing++;
else
FIELD(apicid);
}
else if (!strncmp(s, "SOCKETID", 8)) {
if ((n = sscanf(s, "SOCKETID %u%n", &m.socketid, &next)) != 1)
missing++;
else
FIELD(socketid);
}
else if (strstr(s, "HARDWARE ERROR"))
disclaimer_seen = 1;
else if (!strncmp(s, "(XEN)", 5)) {
char *w;
unsigned bank, cpu;
if (strstr(s, "The hardware reports a non fatal, correctable incident occurred")) {
w = strstr(s, "CPU");
if (w && sscanf(w, "CPU %d", &cpu)) {
m.cpu = cpu;
FIELD(cpu);
}
} else if ((n = sscanf(s, "(XEN) Bank %d: %llx at %llx",
&bank, &m.status, &m.addr) >= 1)) {
m.bank = bank;
FIELD(bank);
if (n >= 2)
FIELD(status);
if (n >= 3)
FIELD(addr);
}
}
else {
s = skipspace(s);
if (*s && data)
dump_mce_final(&m, symbol, missing, recordlen, disclaimer_seen);
if (!dump_raw_ascii)
Wprintf("%s", line);
if (*s && data)
goto restart;
}
if (n > 0)
data = 1;
}
free(line);
if (data)
dump_mce_final(&m, symbol, missing, recordlen, disclaimer_seen);
}
static void remove_pidfile(void)
{
unlink(pidfile);
if (pidfile != pidfile_default)
free(pidfile);
}
static void signal_exit(int sig)
{
remove_pidfile();
_exit(sig);
}
static void setup_pidfile(char *s)
{
char cwd[PATH_MAX];
char *c;
if (*s != '/') {
c = getcwd(cwd, PATH_MAX);
if (!c)
return;
asprintf(&pidfile, "%s/%s", cwd, s);
} else {
asprintf(&pidfile, "%s", s);
}
return;
}
static void write_pidfile(void)
{
FILE *f;
atexit(remove_pidfile);
signal(SIGTERM, signal_exit);
signal(SIGINT, signal_exit);
signal(SIGQUIT, signal_exit);
f = fopen(pidfile, "w");
if (!f) {
Eprintf("Cannot open pidfile `%s'", pidfile);
return;
}
fprintf(f, "%u", getpid());
fclose(f);
}
void usage(void)
{
fprintf(stderr,
"Usage:\n"
" mcelog [options] [mcelogdevice]\n"
"Decode machine check error records from current kernel.\n"
" mcelog [options] --daemon\n"
"Run mcelog in daemon mode, waiting for errors from the kernel.\n"
" mcelog [options] --client\n"
"Query a currently running mcelog daemon for errors\n"
" mcelog [options] --ascii < log\n"
" mcelog [options] --ascii --file log\n"
"Decode machine check ASCII output from kernel logs\n"
"Options:\n"
"--cpu CPU Set CPU type CPU to decode (see below for valid types)\n"
"--cpumhz MHZ Set CPU Mhz to decode time (output unreliable, not needed on new kernels)\n"
"--raw (with --ascii) Dump in raw ASCII format for machine processing\n"
"--daemon Run in background waiting for events (needs newer kernel)\n"
"--ignorenodev Exit silently when the device cannot be opened\n"
"--file filename With --ascii read machine check log from filename instead of stdin\n"
"--syslog Log decoded machine checks in syslog (default stdout or syslog for daemon)\n"
"--syslog-error Log decoded machine checks in syslog with error level\n"
"--no-syslog Never log anything to syslog\n"
"--logfile filename Append log output to logfile instead of stdout\n"
"--dmi Use SMBIOS information to decode DIMMs (needs root)\n"
"--no-dmi Don't use SMBIOS information\n"
"--dmi-verbose Dump SMBIOS information (for debugging)\n"
"--filter Inhibit known bogus events (default on)\n"
"--no-filter Don't inhibit known broken events\n"
"--config-file filename Read config information from config file instead of " CONFIG_FILENAME "\n"
"--foreground Keep in foreground (for debugging)\n"
"--num-errors N Only process N errors (for testing)\n"
"--pidfile file Write pid of daemon into file\n"
);
diskdb_usage();
print_cputypes();
exit(1);
}
enum options {
O_LOGFILE = O_COMMON,
O_K8,
O_P4,
O_GENERIC,
O_CORE2,
O_INTEL_CPU,
O_FILTER,
O_DMI,
O_NO_DMI,
O_DMI_VERBOSE,
O_SYSLOG,
O_NO_SYSLOG,
O_CPUMHZ,
O_SYSLOG_ERROR,
O_RAW,
O_DAEMON,
O_ASCII,
O_CLIENT,
O_VERSION,
O_CONFIG_FILE,
O_CPU,
O_FILE,
O_FOREGROUND,
O_NUMERRORS,
O_PIDFILE,
O_DEBUG_NUMERRORS,
};
static struct option options[] = {
{ "logfile", 1, NULL, O_LOGFILE },
{ "k8", 0, NULL, O_K8 },
{ "p4", 0, NULL, O_P4 },
{ "generic", 0, NULL, O_GENERIC },
{ "core2", 0, NULL, O_CORE2 },
{ "intel-cpu", 1, NULL, O_INTEL_CPU },
{ "ignorenodev", 0, &ignore_nodev, 1 },
{ "filter", 0, &filter_bogus, 1 },
{ "no-filter", 0, &filter_bogus, 0 },
{ "dmi", 0, NULL, O_DMI },
{ "no-dmi", 0, NULL, O_NO_DMI },
{ "dmi-verbose", 1, NULL, O_DMI_VERBOSE },
{ "syslog", 0, NULL, O_SYSLOG },
{ "cpumhz", 1, NULL, O_CPUMHZ },
{ "syslog-error", 0, NULL, O_SYSLOG_ERROR },
{ "dump-raw-ascii", 0, &dump_raw_ascii, 1 },
{ "raw", 0, &dump_raw_ascii, 1 },
{ "no-syslog", 0, NULL, O_NO_SYSLOG },
{ "daemon", 0, NULL, O_DAEMON },
{ "ascii", 0, NULL, O_ASCII },
{ "file", 1, NULL, O_FILE },
{ "version", 0, NULL, O_VERSION },
{ "config-file", 1, NULL, O_CONFIG_FILE },
{ "cpu", 1, NULL, O_CPU },
{ "foreground", 0, NULL, O_FOREGROUND },
{ "client", 0, NULL, O_CLIENT },
{ "num-errors", 1, NULL, O_NUMERRORS },
{ "pidfile", 1, NULL, O_PIDFILE },
{ "debug-numerrors", 0, NULL, O_DEBUG_NUMERRORS }, /* undocumented: for testing */
DISKDB_OPTIONS
{}
};
static int modifier(int opt)
{
int v;
switch (opt) {
case O_LOGFILE:
logfile = optarg;
break;
case O_K8:
cputype = CPU_K8;
cpu_forced = 1;
break;
case O_P4:
cputype = CPU_P4;
cpu_forced = 1;
break;
case O_GENERIC:
cputype = CPU_GENERIC;
cpu_forced = 1;
break;
case O_CORE2:
cputype = CPU_CORE2;
cpu_forced = 1;
break;
case O_INTEL_CPU: {
unsigned fam, mod;
if (sscanf(optarg, "%i,%i", &fam, &mod) != 2)
usage();
cputype = select_intel_cputype(fam, mod);
if (cputype == CPU_GENERIC) {
fprintf(stderr, "Unknown Intel CPU\n");
usage();
}
cpu_forced = 1;
break;
}
case O_CPU:
cputype = lookup_cputype(optarg);
cpu_forced = 1;
intel_cpu_init(cputype);
break;
case O_DMI:
do_dmi = 1;
dmi_forced = 1;
break;
case O_NO_DMI:
dmi_forced = 1;
do_dmi = 0;
break;
case O_DMI_VERBOSE:
if (sscanf(optarg, "%i", &v) != 1)
usage();
dmi_set_verbosity(v);
break;
case O_SYSLOG:
openlog("mcelog", 0, LOG_DAEMON);
syslog_opt = SYSLOG_ALL|SYSLOG_FORCE;
break;
case O_NO_SYSLOG:
syslog_opt = SYSLOG_FORCE;
break;
case O_CPUMHZ:
cpumhz_forced = 1;
if (sscanf(optarg, "%lf", &cpumhz) != 1)
usage();
break;
case O_SYSLOG_ERROR:
syslog_level = LOG_ERR;
syslog_opt = SYSLOG_ALL|SYSLOG_FORCE;
break;
case O_DAEMON:
daemon_mode = 1;
if (!logfile && !foreground)
logfile = logfile_default;
if (!(syslog_opt & SYSLOG_FORCE))
syslog_opt = SYSLOG_REMARK|SYSLOG_ERROR;
break;
case O_FILE:
inputfile = optarg;
break;
case O_FOREGROUND:
foreground = 1;
if (!(syslog_opt & SYSLOG_FORCE))
syslog_opt = SYSLOG_FORCE;
if (logfile == logfile_default)
logfile = NULL;
break;
case O_NUMERRORS:
numerrors = atoi(optarg);
break;
case O_PIDFILE:
setup_pidfile(optarg);
break;
case O_CONFIG_FILE:
/* parsed in config.c */
break;
case O_DEBUG_NUMERRORS:
debug_numerrors = 1;
break;
case 0:
break;
default:
return 0;
}
return 1;
}
static void modifier_finish(void)
{
if (logfile) {
if (open_logfile(logfile) < 0) {
if (daemon_mode && !(syslog_opt & SYSLOG_FORCE))
syslog_opt = SYSLOG_ALL;
SYSERRprintf("Cannot open logfile %s", logfile);
if (!daemon_mode)
exit(1);
}
}
}
void argsleft(int ac, char **av)
{
int opt;
while ((opt = getopt_long(ac, av, "", options, NULL)) != -1) {
if (modifier(opt) != 1)
usage();
}
}
void no_syslog(void)
{
if (!(syslog_opt & SYSLOG_FORCE))
syslog_opt = 0;
}
static int combined_modifier(int opt)
{
int r = modifier(opt);
if (r == 0)
r = diskdb_modifier(opt);
return r;
}
static void general_setup(void)
{
trigger_setup();
yellow_setup();
config_cred("global", "run-credentials", &runcred);
if (config_bool("global", "filter-memory-errors") == 1)
filter_memory_errors = 1;
}
static void drop_cred(void)
{
if (runcred.uid != -1U && runcred.gid == -1U) {
struct passwd *pw = getpwuid(runcred.uid);
if (pw)
runcred.gid = pw->pw_gid;
}
if (runcred.gid != -1U) {
if (setgid(runcred.gid) < 0)
SYSERRprintf("Cannot change group to %d", runcred.gid);
}
if (runcred.uid != -1U) {
if (setuid(runcred.uid) < 0)
SYSERRprintf("Cannot change user to %d", runcred.uid);
}
}
static void process(int fd, unsigned recordlen, unsigned loglen, char *buf)
{
int i;
int len;
int finish = 0;
if (recordlen == 0) {
Wprintf("no data in mce record\n");
return;
}
len = read(fd, buf, recordlen * loglen);
if (len < 0) {
SYSERRprintf("mcelog read");
return;
}
for (i = 0; (i < len / (int)recordlen) && !finish; i++) {
struct mce *mce = (struct mce *)(buf + i*recordlen);
mce_prepare(mce);
if (numerrors > 0 && --numerrors == 0)
finish = 1;
if (!mce_filter(mce, recordlen))
continue;
if (!dump_raw_ascii) {
disclaimer();
Wprintf("MCE %d\n", i);
dump_mce(mce, recordlen);
} else
dump_mce_raw_ascii(mce, recordlen);
flushlog();
}
if (debug_numerrors && numerrors <= 0)
finish = 1;
if (recordlen > sizeof(struct mce)) {
Eprintf("warning: %lu bytes ignored in each record\n",
(unsigned long)recordlen - sizeof(struct mce));
Eprintf("consider an update\n");
}
if (finish)
exit(0);
}
static void noargs(int ac, char **av)
{
if (getopt_long(ac, av, "", options, NULL) != -1)
usage();
}
static void parse_config(char **av)
{
static const char config_fn[] = CONFIG_FILENAME;
const char *fn = config_file(av, config_fn);
if (!fn)
usage();
if (parse_config_file(fn) < 0) {
/* If it's the default file don't complain if it isn't there */
if (fn != config_fn) {
fprintf(stderr, "Cannot open config file %s\n", fn);
exit(1);
}
return;
}
config_options(options, combined_modifier);
}
static void ascii_command(int ac, char **av)
{
FILE *f = stdin;
argsleft(ac, av);
if (inputfile) {
f = fopen(inputfile, "r");
if (!f) {
fprintf(stderr, "Cannot open input file `%s': %s\n",
inputfile, strerror(errno));
exit(1);
}
/* f closed by exit */
}
no_syslog();
checkdmi();
decodefatal(f);
}
static void client_command(int ac, char **av)
{
argsleft(ac, av);
no_syslog();
// XXX modifiers
ask_server("dump all bios\n");
ask_server("pages\n");
}
struct mcefd_data {
unsigned loglen;
unsigned recordlen;
char *buf;
};
static void process_mcefd(struct pollfd *pfd, void *data)
{
struct mcefd_data *d = (struct mcefd_data *)data;
assert((pfd->revents & POLLIN) != 0);
process(pfd->fd, d->recordlen, d->loglen, d->buf);
}
static void handle_sigusr1(int sig)
{
reopenlog();
}
int main(int ac, char **av)
{
struct mcefd_data d = {};
int opt;
int fd;
parse_config(av);
while ((opt = getopt_long(ac, av, "", options, NULL)) != -1) {
if (opt == '?') {
usage();
} else if (combined_modifier(opt) > 0) {
continue;
} else if (opt == O_ASCII) {
ascii_command(ac, av);
exit(0);
} else if (opt == O_CLIENT) {
client_command(ac, av);
exit(0);
} else if (opt == O_VERSION) {
noargs(ac, av);
fprintf(stderr, "mcelog %s\n", MCELOG_VERSION);
exit(0);
} else if (diskdb_cmd(opt, ac, av)) {
exit(0);
} else if (opt == 0)
break;
}
modifier_finish();
if (av[optind])
logfn = av[optind++];
if (av[optind])
usage();
checkdmi();
general_setup();
fd = open(logfn, O_RDONLY);
if (fd < 0) {
if (ignore_nodev)
exit(0);
SYSERRprintf("Cannot open `%s'", logfn);
exit(1);
}
if (ioctl(fd, MCE_GET_RECORD_LEN, &d.recordlen) < 0)
err("MCE_GET_RECORD_LEN");
if (ioctl(fd, MCE_GET_LOG_LEN, &d.loglen) < 0)
err("MCE_GET_LOG_LEN");
d.buf = xalloc(d.recordlen * d.loglen);
if (daemon_mode) {
check_cpu();
prefill_memdb();
if (!do_dmi)
closedmi();
server_setup();
page_setup();
drop_cred();
register_pollcb(fd, POLLIN, process_mcefd, &d);
if (!foreground && daemon(0, need_stdout()) < 0)
err("daemon");
if (pidfile)
write_pidfile();
signal(SIGUSR1, handle_sigusr1);
event_signal(SIGUSR1);
eventloop();
} else {
process(fd, d.recordlen, d.loglen, d.buf);
}
trigger_wait();
exit(0);
}
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