journald: add kmsg source

This commit is contained in:
Lennart Poettering 2012-01-07 04:09:59 +01:00
parent aaf53376aa
commit 6c1e6b98bd
5 changed files with 290 additions and 13 deletions

View file

@ -28,3 +28,4 @@ Journal.RuntimeKeepFree, config_parse_bytes, 0, offsetof(Server, runtime_m
Journal.ForwardToSyslog, config_parse_bool, 0, offsetof(Server, forward_to_syslog)
Journal.ForwardToKMsg, config_parse_bool, 0, offsetof(Server, forward_to_kmsg)
Journal.ForwardToConsole, config_parse_bool, 0, offsetof(Server, forward_to_console)
Journal.ImportKernel, config_parse_bool, 0, offsetof(Server, import_proc_kmsg)

View file

@ -902,13 +902,14 @@ finish:
free(ident_buf);
}
static void read_identifier(const char **buf, char **identifier) {
static void read_identifier(const char **buf, char **identifier, char **pid) {
const char *p;
char *t;
size_t l, e;
assert(buf);
assert(identifier);
assert(pid);
p = *buf;
@ -928,6 +929,10 @@ static void read_identifier(const char **buf, char **identifier) {
for (;;) {
if (p[k] == '[') {
t = strndup(p+k+1, l-k-2);
if (t)
*pid = t;
l = k;
break;
}
@ -948,11 +953,11 @@ static void read_identifier(const char **buf, char **identifier) {
}
static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL;
struct iovec iovec[N_IOVEC_META_FIELDS + 5];
char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *syslog_pid = NULL;
struct iovec iovec[N_IOVEC_META_FIELDS + 6];
unsigned n = 0;
int priority = LOG_USER | LOG_INFO;
char *identifier = NULL;
char *identifier = NULL, *pid = NULL;
assert(s);
assert(buf);
@ -962,7 +967,7 @@ static void process_syslog_message(Server *s, const char *buf, struct ucred *ucr
parse_syslog_priority((char**) &buf, &priority);
skip_syslog_date((char**) &buf);
read_identifier(&buf, &identifier);
read_identifier(&buf, &identifier, &pid);
if (s->forward_to_kmsg)
forward_kmsg(s, priority, identifier, buf, ucred);
@ -985,6 +990,12 @@ static void process_syslog_message(Server *s, const char *buf, struct ucred *ucr
IOVEC_SET_STRING(iovec[n++], syslog_identifier);
}
if (pid) {
syslog_pid = strappend("SYSLOG_PID=", pid);
if (syslog_pid)
IOVEC_SET_STRING(iovec[n++], syslog_pid);
}
message = strappend("MESSAGE=", buf);
if (message)
IOVEC_SET_STRING(iovec[n++], message);
@ -993,6 +1004,7 @@ static void process_syslog_message(Server *s, const char *buf, struct ucred *ucr
free(message);
free(identifier);
free(pid);
free(syslog_priority);
free(syslog_facility);
free(syslog_identifier);
@ -1376,7 +1388,7 @@ static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
skip = end - p + 1;
else if (remaining >= sizeof(s->buffer) - 1) {
end = p + sizeof(s->buffer) - 1;
skip = sizeof(s->buffer) - 1;
skip = remaining;
} else
break;
@ -1526,6 +1538,159 @@ fail:
return r;
}
static int parse_kernel_timestamp(char **_p, usec_t *t) {
usec_t r;
int k, i;
char *p;
assert(_p);
assert(*_p);
assert(t);
p = *_p;
if (strlen(p) < 14 || p[0] != '[' || p[13] != ']' || p[6] != '.')
return 0;
r = 0;
for (i = 1; i <= 5; i++) {
r *= 10;
if (p[i] == ' ')
continue;
k = undecchar(p[i]);
if (k < 0)
return 0;
r += k;
}
for (i = 7; i <= 12; i++) {
r *= 10;
k = undecchar(p[i]);
if (k < 0)
return 0;
r += k;
}
*t = r;
*_p += 14;
*_p += strspn(*_p, WHITESPACE);
return 1;
}
static void proc_kmsg_line(Server *s, const char *p) {
struct iovec iovec[N_IOVEC_META_FIELDS + 7];
char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL;
int priority = LOG_KERN | LOG_INFO;
unsigned n = 0;
usec_t usec;
char *identifier = NULL, *pid = NULL;
assert(s);
assert(p);
parse_syslog_priority((char **) &p, &priority);
if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN)
return;
if (parse_kernel_timestamp((char **) &p, &usec) > 0) {
if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu",
(unsigned long long) usec) >= 0)
IOVEC_SET_STRING(iovec[n++], source_time);
}
IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=kernel");
if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
IOVEC_SET_STRING(iovec[n++], syslog_priority);
if ((priority & LOG_FACMASK) == LOG_KERN) {
if (s->forward_to_syslog)
forward_syslog(s, priority, "kernel", p, NULL, NULL);
IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=kernel");
} else {
read_identifier(&p, &identifier, &pid);
if (s->forward_to_syslog)
forward_syslog(s, priority, identifier, p, NULL, NULL);
if (identifier) {
syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
if (syslog_identifier)
IOVEC_SET_STRING(iovec[n++], syslog_identifier);
}
if (pid) {
syslog_pid = strappend("SYSLOG_PID=", pid);
if (syslog_pid)
IOVEC_SET_STRING(iovec[n++], syslog_pid);
}
if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
IOVEC_SET_STRING(iovec[n++], syslog_facility);
}
message = strappend("MESSAGE=", p);
if (message)
IOVEC_SET_STRING(iovec[n++], message);
dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, priority);
free(message);
free(syslog_priority);
free(syslog_identifier);
free(syslog_pid);
free(syslog_facility);
free(source_time);
free(identifier);
free(pid);
}
static void proc_kmsg_scan(Server *s) {
char *p;
size_t remaining;
assert(s);
p = s->proc_kmsg_buffer;
remaining = s->proc_kmsg_length;
for (;;) {
char *end;
size_t skip;
end = memchr(p, '\n', remaining);
if (end)
skip = end - p + 1;
else if (remaining >= sizeof(s->proc_kmsg_buffer) - 1) {
end = p + sizeof(s->proc_kmsg_buffer) - 1;
skip = remaining;
} else
break;
*end = 0;
proc_kmsg_line(s, p);
remaining -= skip;
p += skip;
}
if (p > s->proc_kmsg_buffer) {
memmove(s->proc_kmsg_buffer, p, remaining);
s->proc_kmsg_length = remaining;
}
}
static int system_journal_open(Server *s) {
int r;
char *fn;
@ -1645,6 +1810,8 @@ static int server_flush_to_var(Server *s) {
if (!s->system_journal)
return 0;
log_info("Flushing to /var...");
r = sd_id128_get_machine(&machine);
if (r < 0) {
log_error("Failed to get machine id: %s", strerror(-r));
@ -1700,6 +1867,49 @@ finish:
return r;
}
static int server_read_proc_kmsg(Server *s) {
ssize_t l;
assert(s);
assert(s->proc_kmsg_fd >= 0);
l = read(s->proc_kmsg_fd, s->proc_kmsg_buffer + s->proc_kmsg_length, sizeof(s->proc_kmsg_buffer) - 1 - s->proc_kmsg_length);
if (l < 0) {
if (errno == EAGAIN || errno == EINTR)
return 0;
log_error("Failed to read from kernel: %m");
return -errno;
}
s->proc_kmsg_length += l;
proc_kmsg_scan(s);
return 1;
}
static int server_flush_proc_kmsg(Server *s) {
int r;
assert(s);
if (s->proc_kmsg_fd < 0)
return 0;
log_info("Flushing /proc/kmsg...");
for (;;) {
r = server_read_proc_kmsg(s);
if (r < 0)
return r;
if (r == 0)
break;
}
return 0;
}
static int process_event(Server *s, struct epoll_event *ev) {
assert(s);
@ -1719,7 +1929,7 @@ static int process_event(Server *s, struct epoll_event *ev) {
return -EIO;
if (errno == EINTR || errno == EAGAIN)
return 0;
return 1;
return -errno;
}
@ -1732,6 +1942,20 @@ static int process_event(Server *s, struct epoll_event *ev) {
log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
return 0;
} else if (ev->data.fd == s->proc_kmsg_fd) {
int r;
if (ev->events != EPOLLIN) {
log_info("Got invalid event from epoll.");
return -EIO;
}
r = server_read_proc_kmsg(s);
if (r < 0)
return r;
return 1;
} else if (ev->data.fd == s->native_fd ||
ev->data.fd == s->syslog_fd) {
@ -1874,7 +2098,7 @@ static int open_syslog_socket(Server *s) {
if (s->syslog_fd < 0) {
s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->syslog_fd < 0) {
log_error("socket() failed: %m");
return -errno;
@ -1938,7 +2162,7 @@ static int open_native_socket(Server*s) {
if (s->native_fd < 0) {
s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->native_fd < 0) {
log_error("socket() failed: %m");
return -errno;
@ -1993,7 +2217,7 @@ static int open_stdout_socket(Server *s) {
if (s->stdout_fd < 0) {
s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->stdout_fd < 0) {
log_error("socket() failed: %m");
return -errno;
@ -2030,6 +2254,32 @@ static int open_stdout_socket(Server *s) {
return 0;
}
static int open_proc_kmsg(Server *s) {
struct epoll_event ev;
assert(s);
if (!s->import_proc_kmsg)
return 0;
s->proc_kmsg_fd = open("/proc/kmsg", O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
if (s->proc_kmsg_fd < 0) {
log_warning("Failed to open /proc/kmsg, ignoring: %m");
return 0;
}
zero(ev);
ev.events = EPOLLIN;
ev.data.fd = s->proc_kmsg_fd;
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->proc_kmsg_fd, &ev) < 0) {
log_error("Failed to add /proc/kmsg fd to epoll object: %m");
return -errno;
}
return 0;
}
static int open_signalfd(Server *s) {
sigset_t mask;
struct epoll_event ev;
@ -2143,13 +2393,14 @@ static int server_init(Server *s) {
assert(s);
zero(*s);
s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1;
s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->proc_kmsg_fd = -1;
s->compress = true;
s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
s->forward_to_syslog = true;
s->import_proc_kmsg = true;
memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
@ -2222,6 +2473,10 @@ static int server_init(Server *s) {
if (r < 0)
return r;
r = open_proc_kmsg(s);
if (r < 0)
return r;
r = system_journal_open(s);
if (r < 0)
return r;
@ -2270,6 +2525,9 @@ static void server_done(Server *s) {
if (s->stdout_fd >= 0)
close_nointr_nofail(s->stdout_fd);
if (s->proc_kmsg_fd >= 0)
close_nointr_nofail(s->proc_kmsg_fd);
if (s->rate_limit)
journal_rate_limit_free(s->rate_limit);
@ -2302,6 +2560,7 @@ int main(int argc, char *argv[]) {
server_vacuum(&server);
server_flush_to_var(&server);
server_flush_proc_kmsg(&server);
log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");

View file

@ -40,6 +40,7 @@ typedef struct Server {
int syslog_fd;
int native_fd;
int stdout_fd;
int proc_kmsg_fd;
JournalFile *runtime_journal;
JournalFile *system_journal;
@ -63,6 +64,10 @@ typedef struct Server {
bool forward_to_syslog;
bool forward_to_console;
bool import_proc_kmsg;
char proc_kmsg_buffer[LINE_MAX+1];
size_t proc_kmsg_length;
uint64_t cached_available_space;
usec_t cached_available_space_timestamp;

View file

@ -22,3 +22,4 @@
#ForwardToSyslog=yes
#ForwardToKMsg=no
#ForwardToConsole=no
#ImportKernel=yes

View file

@ -64,6 +64,7 @@ static int parse_field(const void *data, size_t length, const char *field, char
return -ENOMEM;
}
free(*target);
*target = buf;
*target_size = nl;
@ -92,8 +93,8 @@ static int output_short(sd_journal *j, unsigned line, bool show_all) {
const void *data;
size_t length;
size_t n = 0;
char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *message = NULL;
size_t hostname_len = 0, identifier_len = 0, comm_len = 0, pid_len = 0, message_len = 0;
char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *fake_pid = NULL, *message = NULL;
size_t hostname_len = 0, identifier_len = 0, comm_len = 0, pid_len = 0, fake_pid_len = 0, message_len = 0;
assert(j);
@ -123,6 +124,12 @@ static int output_short(sd_journal *j, unsigned line, bool show_all) {
else if (r > 0)
continue;
r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len);
if (r < 0)
goto finish;
else if (r > 0)
continue;
r = parse_field(data, length, "MESSAGE=", &message, &message_len);
if (r < 0)
goto finish;
@ -164,6 +171,9 @@ static int output_short(sd_journal *j, unsigned line, bool show_all) {
if (pid && shall_print(show_all, pid, pid_len)) {
printf("[%.*s]", (int) pid_len, pid);
n += pid_len + 2;
} else if (fake_pid && shall_print(show_all, fake_pid, fake_pid_len)) {
printf("[%.*s]", (int) fake_pid_len, fake_pid);
n += fake_pid_len + 2;
}
if (show_all)
@ -193,6 +203,7 @@ finish:
free(identifier);
free(comm);
free(pid);
free(fake_pid);
free(message);
return r;