summaryrefslogtreecommitdiff
path: root/src/journal/journald.c
diff options
context:
space:
mode:
authorLennart Poettering <lennart@poettering.net>2012-01-07 04:09:59 +0100
committerLennart Poettering <lennart@poettering.net>2012-01-07 04:10:21 +0100
commit6c1e6b98bde8288d65d7cddf87ff9bedf94a3e1c (patch)
tree1dbafbfac62dc374edccc1e5153fbb1c71e5f132 /src/journal/journald.c
parentaaf53376aaac326b700fd3f8e28bbd842f0a9ed1 (diff)
journald: add kmsg source
Diffstat (limited to 'src/journal/journald.c')
-rw-r--r--src/journal/journald.c281
1 files changed, 270 insertions, 11 deletions
diff --git a/src/journal/journald.c b/src/journal/journald.c
index 1ec1542a14..d02030939a 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -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");