#include <sys/mman.h>
#include <sys/socket.h>
-#include <systemd/sd-messages.h>
+#include "systemd/sd-messages.h"
#include <libudev.h>
-#include "journald.h"
+#include "journald-server.h"
#include "journald-kmsg.h"
#include "journald-syslog.h"
int priority,
const char *identifier,
const char *message,
- struct ucred *ucred) {
+ const struct ucred *ucred) {
struct iovec iovec[5];
- char header_priority[6], header_pid[16];
+ char header_priority[DECIMAL_STR_MAX(priority) + 3],
+ header_pid[sizeof("[]: ")-1 + DECIMAL_STR_MAX(pid_t) + 1];
int n = 0;
char *ident_buf = NULL;
priority = syslog_fixup_facility(priority);
/* First: priority field */
- snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
- char_array_0(header_priority);
+ xsprintf(header_priority, "<%i>", priority);
IOVEC_SET_STRING(iovec[n++], header_priority);
/* Second: identifier and PID */
identifier = ident_buf;
}
- snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
- char_array_0(header_pid);
+ xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid);
if (identifier)
IOVEC_SET_STRING(iovec[n++], identifier);
IOVEC_SET_STRING(iovec[n++], "\n");
if (writev(s->dev_kmsg_fd, iovec, n) < 0)
- log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno));
+ log_debug_errno(errno, "Failed to write to /dev/kmsg for logging: %m");
free(ident_buf);
}
return t == getpid();
}
-static void dev_kmsg_record(Server *s, char *p, size_t l) {
+static void dev_kmsg_record(Server *s, const char *p, size_t l) {
struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS + 2 + N_IOVEC_UDEV_FIELDS];
char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL;
int priority, r;
unsigned n = 0, z = 0, j;
- usec_t usec;
+ unsigned long long usec;
char *identifier = NULL, *pid = NULL, *e, *f, *k;
uint64_t serial;
size_t pl;
/* Did we lose any? */
if (serial > *s->kernel_seqnum)
- server_driver_message(s, SD_MESSAGE_JOURNAL_MISSED, "Missed %llu kernel messages", (unsigned long long) serial - *s->kernel_seqnum - 1);
+ server_driver_message(s, SD_MESSAGE_JOURNAL_MISSED, "Missed %"PRIu64" kernel messages",
+ serial - *s->kernel_seqnum);
/* Make sure we never read this one again. Note that
* we always store the next message serial we expect
e = f;
*e = 0;
- r = parse_usec(p, &usec);
+ r = safe_atollu(p, &usec);
if (r < 0)
return;
break;
g = udev_list_entry_get_name(ll);
- b = strappend("_UDEV_DEVLINK=", g);
if (g) {
- IOVEC_SET_STRING(iovec[n++], b);
- z++;
+ b = strappend("_UDEV_DEVLINK=", g);
+ if (b) {
+ IOVEC_SET_STRING(iovec[n++], b);
+ z++;
+ }
}
j++;
}
}
- if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu",
- (unsigned long long) usec) >= 0)
+ if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu", 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 (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+
if ((priority & LOG_FACMASK) == LOG_KERN)
IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=kernel");
else {
- syslog_parse_identifier((const char**) &p, &identifier, &pid);
+ pl -= syslog_parse_identifier((const char**) &p, &identifier, &pid);
/* Avoid any messages we generated ourselves via
* log_info() and friends. */
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 = cunescape_length_with_prefix(p, pl, "MESSAGE=");
if (message)
IOVEC_SET_STRING(iovec[n++], message);
- server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, NULL, priority);
+ server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, NULL, priority, 0);
finish:
for (j = 0; j < z; j++)
free(pid);
}
-int server_read_dev_kmsg(Server *s) {
+static int server_read_dev_kmsg(Server *s) {
char buffer[8192+1]; /* the kernel-side limit per record is 8K currently */
ssize_t l;
* return EINVAL when we try. So handle this cleanly,
* but don' try to ever read from it again. */
if (errno == EINVAL) {
- epoll_ctl(s->epoll_fd, EPOLL_CTL_DEL, s->dev_kmsg_fd, NULL);
+ s->dev_kmsg_event_source = sd_event_source_unref(s->dev_kmsg_event_source);
return 0;
}
if (errno == EAGAIN || errno == EINTR || errno == EPIPE)
return 0;
- log_error("Failed to read from kernel: %m");
+ log_error_errno(errno, "Failed to read from kernel: %m");
return -errno;
}
return 0;
}
+static int dispatch_dev_kmsg(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
+ Server *s = userdata;
+
+ assert(es);
+ assert(fd == s->dev_kmsg_fd);
+ assert(s);
+
+ if (revents & EPOLLERR)
+ log_warning("/dev/kmsg buffer overrun, some messages lost.");
+
+ if (!(revents & EPOLLIN))
+ log_error("Got invalid event from epoll for /dev/kmsg: %"PRIx32, revents);
+
+ return server_read_dev_kmsg(s);
+}
+
int server_open_dev_kmsg(Server *s) {
- struct epoll_event ev;
+ int r;
assert(s);
s->dev_kmsg_fd = open("/dev/kmsg", O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
if (s->dev_kmsg_fd < 0) {
- log_warning("Failed to open /dev/kmsg, ignoring: %m");
+ log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
+ "Failed to open /dev/kmsg, ignoring: %m");
return 0;
}
- zero(ev);
- ev.events = EPOLLIN;
- ev.data.fd = s->dev_kmsg_fd;
- if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->dev_kmsg_fd, &ev) < 0) {
+ r = sd_event_add_io(s->event, &s->dev_kmsg_event_source, s->dev_kmsg_fd, EPOLLIN, dispatch_dev_kmsg, s);
+ if (r < 0) {
/* This will fail with EPERM on older kernels where
* /dev/kmsg is not readable. */
- if (errno == EPERM)
- return 0;
+ if (r == -EPERM) {
+ r = 0;
+ goto fail;
+ }
- log_error("Failed to add /dev/kmsg fd to epoll object: %m");
- return -errno;
+ log_error_errno(r, "Failed to add /dev/kmsg fd to event loop: %m");
+ goto fail;
+ }
+
+ r = sd_event_source_set_priority(s->dev_kmsg_event_source, SD_EVENT_PRIORITY_IMPORTANT+10);
+ if (r < 0) {
+ log_error_errno(r, "Failed to adjust priority of kmsg event source: %m");
+ goto fail;
}
s->dev_kmsg_readable = true;
return 0;
+
+fail:
+ s->dev_kmsg_event_source = sd_event_source_unref(s->dev_kmsg_event_source);
+ s->dev_kmsg_fd = safe_close(s->dev_kmsg_fd);
+
+ return r;
}
int server_open_kernel_seqnum(Server *s) {
- int fd;
+ _cleanup_close_ int fd;
uint64_t *p;
assert(s);
fd = open("/run/systemd/journal/kernel-seqnum", O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0644);
if (fd < 0) {
- log_error("Failed to open /run/systemd/journal/kernel-seqnum, ignoring: %m");
+ log_error_errno(errno, "Failed to open /run/systemd/journal/kernel-seqnum, ignoring: %m");
return 0;
}
if (posix_fallocate(fd, 0, sizeof(uint64_t)) < 0) {
- log_error("Failed to allocate sequential number file, ignoring: %m");
- close_nointr_nofail(fd);
+ log_error_errno(errno, "Failed to allocate sequential number file, ignoring: %m");
return 0;
}
p = mmap(NULL, sizeof(uint64_t), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED) {
- log_error("Failed to map sequential number file, ignoring: %m");
- close_nointr_nofail(fd);
+ log_error_errno(errno, "Failed to map sequential number file, ignoring: %m");
return 0;
}
- close_nointr_nofail(fd);
s->kernel_seqnum = p;
return 0;
~ianmdlvl / elogind.git / blobdiff