2012-08-22 03:09:44 +02:00
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <fcntl.h>
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2015-10-23 18:52:53 +02:00
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#include <sys/epoll.h>
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2012-08-22 03:09:44 +02:00
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#include <sys/mman.h>
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2012-08-24 01:46:38 +02:00
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#include <sys/socket.h>
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2015-10-23 18:52:53 +02:00
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#include <unistd.h>
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2012-08-22 03:09:44 +02:00
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2015-11-17 06:52:45 +01:00
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#include "libudev.h"
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2015-10-23 18:52:53 +02:00
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#include "sd-messages.h"
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2012-08-22 03:09:44 +02:00
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2017-09-21 13:52:34 +02:00
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#include "alloc-util.h"
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2015-10-23 18:52:53 +02:00
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#include "escape.h"
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2015-10-25 13:14:12 +01:00
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#include "fd-util.h"
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2016-11-07 16:14:59 +01:00
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#include "format-util.h"
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2015-10-27 01:02:30 +01:00
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#include "io-util.h"
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2015-10-25 13:14:12 +01:00
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#include "journald-kmsg.h"
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2012-11-12 17:29:07 +01:00
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#include "journald-server.h"
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2012-08-22 03:21:03 +02:00
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#include "journald-syslog.h"
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2015-10-26 16:18:16 +01:00
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#include "parse-util.h"
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2015-04-10 19:10:00 +02:00
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#include "process-util.h"
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2015-10-27 01:26:31 +01:00
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#include "stdio-util.h"
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2015-10-24 22:58:24 +02:00
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#include "string-util.h"
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2012-08-22 03:09:44 +02:00
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void server_forward_kmsg(
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Server *s,
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int priority,
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const char *identifier,
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const char *message,
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2014-11-02 21:46:42 +01:00
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const struct ucred *ucred) {
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2012-08-22 03:09:44 +02:00
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2017-09-21 13:52:34 +02:00
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_cleanup_free_ char *ident_buf = NULL;
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2012-08-22 03:09:44 +02:00
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struct iovec iovec[5];
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2015-02-03 18:17:00 +01:00
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char header_priority[DECIMAL_STR_MAX(priority) + 3],
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2015-01-27 14:00:11 +01:00
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header_pid[sizeof("[]: ")-1 + DECIMAL_STR_MAX(pid_t) + 1];
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2012-08-22 03:09:44 +02:00
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int n = 0;
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assert(s);
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assert(priority >= 0);
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assert(priority <= 999);
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assert(message);
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if (_unlikely_(LOG_PRI(priority) > s->max_level_kmsg))
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return;
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if (_unlikely_(s->dev_kmsg_fd < 0))
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return;
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/* Never allow messages with kernel facility to be written to
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* kmsg, regardless where the data comes from. */
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priority = syslog_fixup_facility(priority);
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/* First: priority field */
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2015-01-27 14:00:11 +01:00
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xsprintf(header_priority, "<%i>", priority);
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(header_priority);
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2012-08-22 03:09:44 +02:00
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/* Second: identifier and PID */
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if (ucred) {
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if (!identifier) {
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get_process_comm(ucred->pid, &ident_buf);
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identifier = ident_buf;
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}
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2015-01-27 14:00:11 +01:00
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xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid);
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2012-08-22 03:09:44 +02:00
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if (identifier)
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(identifier);
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2012-08-22 03:09:44 +02:00
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(header_pid);
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2012-08-22 03:09:44 +02:00
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} else if (identifier) {
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(identifier);
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iovec[n++] = IOVEC_MAKE_STRING(": ");
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2012-08-22 03:09:44 +02:00
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}
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/* Fourth: message */
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(message);
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iovec[n++] = IOVEC_MAKE_STRING("\n");
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2012-08-22 03:09:44 +02:00
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if (writev(s->dev_kmsg_fd, iovec, n) < 0)
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2014-11-28 19:29:59 +01:00
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log_debug_errno(errno, "Failed to write to /dev/kmsg for logging: %m");
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2012-08-22 03:09:44 +02:00
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}
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static bool is_us(const char *pid) {
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pid_t t;
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assert(pid);
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if (parse_pid(pid, &t) < 0)
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return false;
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2017-07-20 16:19:18 +02:00
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return t == getpid_cached();
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2012-08-22 03:09:44 +02:00
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}
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2014-11-02 21:46:42 +01:00
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static void dev_kmsg_record(Server *s, const char *p, size_t l) {
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2012-08-22 03:09:44 +02:00
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struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS + 2 + N_IOVEC_UDEV_FIELDS];
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2017-09-21 13:52:34 +02:00
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_cleanup_free_ char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL, *identifier = NULL, *pid = NULL;
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2012-08-22 03:09:44 +02:00
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int priority, r;
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unsigned n = 0, z = 0, j;
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2012-10-26 14:55:03 +02:00
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unsigned long long usec;
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2017-09-21 13:52:34 +02:00
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char *e, *f, *k;
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2012-08-22 03:09:44 +02:00
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uint64_t serial;
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size_t pl;
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char *kernel_device = NULL;
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assert(s);
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assert(p);
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if (l <= 0)
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return;
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e = memchr(p, ',', l);
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if (!e)
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return;
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*e = 0;
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r = safe_atoi(p, &priority);
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if (r < 0 || priority < 0 || priority > 999)
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return;
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if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN)
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return;
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l -= (e - p) + 1;
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p = e + 1;
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e = memchr(p, ',', l);
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if (!e)
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return;
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*e = 0;
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r = safe_atou64(p, &serial);
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if (r < 0)
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return;
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if (s->kernel_seqnum) {
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/* We already read this one? */
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if (serial < *s->kernel_seqnum)
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return;
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/* Did we lose any? */
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if (serial > *s->kernel_seqnum)
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tree-wide: add SD_ID128_MAKE_STR, remove LOG_MESSAGE_ID
Embedding sd_id128_t's in constant strings was rather cumbersome. We had
SD_ID128_CONST_STR which returned a const char[], but it had two problems:
- it wasn't possible to statically concatanate this array with a normal string
- gcc wasn't really able to optimize this, and generated code to perform the
"conversion" at runtime.
Because of this, even our own code in coredumpctl wasn't using
SD_ID128_CONST_STR.
Add a new macro to generate a constant string: SD_ID128_MAKE_STR.
It is not as elegant as SD_ID128_CONST_STR, because it requires a repetition
of the numbers, but in practice it is more convenient to use, and allows gcc
to generate smarter code:
$ size .libs/systemd{,-logind,-journald}{.old,}
text data bss dec hex filename
1265204 149564 4808 1419576 15a938 .libs/systemd.old
1260268 149564 4808 1414640 1595f0 .libs/systemd
246805 13852 209 260866 3fb02 .libs/systemd-logind.old
240973 13852 209 255034 3e43a .libs/systemd-logind
146839 4984 34 151857 25131 .libs/systemd-journald.old
146391 4984 34 151409 24f71 .libs/systemd-journald
It is also much easier to check if a certain binary uses a certain MESSAGE_ID:
$ strings .libs/systemd.old|grep MESSAGE_ID
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
MESSAGE_ID=%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x
$ strings .libs/systemd|grep MESSAGE_ID
MESSAGE_ID=c7a787079b354eaaa9e77b371893cd27
MESSAGE_ID=b07a249cd024414a82dd00cd181378ff
MESSAGE_ID=641257651c1b4ec9a8624d7a40a9e1e7
MESSAGE_ID=de5b426a63be47a7b6ac3eaac82e2f6f
MESSAGE_ID=d34d037fff1847e6ae669a370e694725
MESSAGE_ID=7d4958e842da4a758f6c1cdc7b36dcc5
MESSAGE_ID=1dee0369c7fc4736b7099b38ecb46ee7
MESSAGE_ID=39f53479d3a045ac8e11786248231fbf
MESSAGE_ID=be02cf6855d2428ba40df7e9d022f03d
MESSAGE_ID=7b05ebc668384222baa8881179cfda54
MESSAGE_ID=9d1aaa27d60140bd96365438aad20286
2016-11-06 18:48:23 +01:00
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server_driver_message(s,
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"MESSAGE_ID=" SD_MESSAGE_JOURNAL_MISSED_STR,
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2015-11-08 20:05:55 +01:00
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LOG_MESSAGE("Missed %"PRIu64" kernel messages",
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serial - *s->kernel_seqnum),
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NULL);
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2012-08-22 03:09:44 +02:00
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/* Make sure we never read this one again. Note that
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* we always store the next message serial we expect
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* here, simply because this makes handling the first
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* message with serial 0 easy. */
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*s->kernel_seqnum = serial + 1;
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}
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l -= (e - p) + 1;
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p = e + 1;
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f = memchr(p, ';', l);
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if (!f)
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return;
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/* Kernel 3.6 has the flags field, kernel 3.5 lacks that */
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e = memchr(p, ',', l);
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if (!e || f < e)
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e = f;
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*e = 0;
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2012-10-26 14:55:03 +02:00
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r = safe_atollu(p, &usec);
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2012-08-22 03:09:44 +02:00
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if (r < 0)
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return;
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l -= (f - p) + 1;
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p = f + 1;
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e = memchr(p, '\n', l);
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if (!e)
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return;
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*e = 0;
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pl = e - p;
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l -= (e - p) + 1;
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k = e + 1;
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for (j = 0; l > 0 && j < N_IOVEC_KERNEL_FIELDS; j++) {
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char *m;
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2015-09-08 12:23:18 +02:00
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/* Metadata fields attached */
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2012-08-22 03:09:44 +02:00
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if (*k != ' ')
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break;
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2016-02-23 05:32:04 +01:00
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k++, l--;
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2012-08-22 03:09:44 +02:00
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e = memchr(k, '\n', l);
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if (!e)
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return;
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*e = 0;
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2015-04-06 20:11:41 +02:00
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if (cunescape_length_with_prefix(k, e - k, "_KERNEL_", UNESCAPE_RELAX, &m) < 0)
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2012-08-22 03:09:44 +02:00
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break;
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if (startswith(m, "_KERNEL_DEVICE="))
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kernel_device = m + 15;
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(m);
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2012-08-22 03:09:44 +02:00
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z++;
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l -= (e - k) + 1;
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k = e + 1;
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}
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if (kernel_device) {
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struct udev_device *ud;
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ud = udev_device_new_from_device_id(s->udev, kernel_device);
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if (ud) {
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const char *g;
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struct udev_list_entry *ll;
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char *b;
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g = udev_device_get_devnode(ud);
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if (g) {
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b = strappend("_UDEV_DEVNODE=", g);
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if (b) {
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(b);
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2012-08-22 03:09:44 +02:00
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z++;
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}
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}
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g = udev_device_get_sysname(ud);
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if (g) {
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b = strappend("_UDEV_SYSNAME=", g);
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if (b) {
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(b);
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2012-08-22 03:09:44 +02:00
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z++;
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}
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}
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j = 0;
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ll = udev_device_get_devlinks_list_entry(ud);
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udev_list_entry_foreach(ll, ll) {
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if (j > N_IOVEC_UDEV_FIELDS)
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break;
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g = udev_list_entry_get_name(ll);
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if (g) {
|
2013-03-30 22:47:48 +01:00
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b = strappend("_UDEV_DEVLINK=", g);
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if (b) {
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(b);
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2013-03-30 22:47:48 +01:00
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z++;
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}
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2012-08-22 03:09:44 +02:00
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}
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j++;
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}
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udev_device_unref(ud);
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}
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}
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|
2012-10-26 14:55:03 +02:00
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if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu", usec) >= 0)
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(source_time);
|
2012-08-22 03:09:44 +02:00
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=kernel");
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2012-08-22 03:09:44 +02:00
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if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
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2017-09-21 13:52:34 +02:00
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iovec[n++] = IOVEC_MAKE_STRING(syslog_priority);
|
2012-08-22 03:09:44 +02:00
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2014-07-25 14:38:22 +02:00
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|
|
if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
|
2017-09-21 13:52:34 +02:00
|
|
|
iovec[n++] = IOVEC_MAKE_STRING(syslog_facility);
|
2014-07-25 14:38:22 +02:00
|
|
|
|
2012-08-22 03:09:44 +02:00
|
|
|
if ((priority & LOG_FACMASK) == LOG_KERN)
|
2017-09-21 13:52:34 +02:00
|
|
|
iovec[n++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=kernel");
|
2012-08-22 03:09:44 +02:00
|
|
|
else {
|
2012-10-13 11:31:54 +02:00
|
|
|
pl -= syslog_parse_identifier((const char**) &p, &identifier, &pid);
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
/* Avoid any messages we generated ourselves via
|
|
|
|
* log_info() and friends. */
|
|
|
|
if (pid && is_us(pid))
|
|
|
|
goto finish;
|
|
|
|
|
|
|
|
if (identifier) {
|
|
|
|
syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
|
|
|
|
if (syslog_identifier)
|
2017-09-21 13:52:34 +02:00
|
|
|
iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier);
|
2012-08-22 03:09:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (pid) {
|
|
|
|
syslog_pid = strappend("SYSLOG_PID=", pid);
|
|
|
|
if (syslog_pid)
|
2017-09-21 13:52:34 +02:00
|
|
|
iovec[n++] = IOVEC_MAKE_STRING(syslog_pid);
|
2012-08-22 03:09:44 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-04-06 20:11:41 +02:00
|
|
|
if (cunescape_length_with_prefix(p, pl, "MESSAGE=", UNESCAPE_RELAX, &message) >= 0)
|
2017-09-21 13:52:34 +02:00
|
|
|
iovec[n++] = IOVEC_MAKE_STRING(message);
|
2012-08-22 03:09:44 +02:00
|
|
|
|
2017-07-17 23:36:35 +02:00
|
|
|
server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, priority, 0);
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
finish:
|
|
|
|
for (j = 0; j < z; j++)
|
|
|
|
free(iovec[j].iov_base);
|
|
|
|
}
|
|
|
|
|
2013-12-11 20:13:44 +01:00
|
|
|
static int server_read_dev_kmsg(Server *s) {
|
2012-08-22 03:09:44 +02:00
|
|
|
char buffer[8192+1]; /* the kernel-side limit per record is 8K currently */
|
|
|
|
ssize_t l;
|
|
|
|
|
|
|
|
assert(s);
|
|
|
|
assert(s->dev_kmsg_fd >= 0);
|
|
|
|
|
|
|
|
l = read(s->dev_kmsg_fd, buffer, sizeof(buffer) - 1);
|
|
|
|
if (l == 0)
|
|
|
|
return 0;
|
|
|
|
if (l < 0) {
|
|
|
|
/* Old kernels who don't allow reading from /dev/kmsg
|
|
|
|
* return EINVAL when we try. So handle this cleanly,
|
|
|
|
* but don' try to ever read from it again. */
|
|
|
|
if (errno == EINVAL) {
|
2013-12-11 20:13:44 +01:00
|
|
|
s->dev_kmsg_event_source = sd_event_source_unref(s->dev_kmsg_event_source);
|
2012-08-22 03:09:44 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (errno == EAGAIN || errno == EINTR || errno == EPIPE)
|
|
|
|
return 0;
|
|
|
|
|
2015-11-05 13:44:20 +01:00
|
|
|
return log_error_errno(errno, "Failed to read from kernel: %m");
|
2012-08-22 03:09:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
dev_kmsg_record(s, buffer, l);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
int server_flush_dev_kmsg(Server *s) {
|
|
|
|
int r;
|
|
|
|
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
if (s->dev_kmsg_fd < 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (!s->dev_kmsg_readable)
|
|
|
|
return 0;
|
|
|
|
|
2012-09-06 09:32:51 +02:00
|
|
|
log_debug("Flushing /dev/kmsg...");
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
r = server_read_dev_kmsg(s);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
if (r == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-12-11 20:13:44 +01:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2012-08-22 03:09:44 +02:00
|
|
|
int server_open_dev_kmsg(Server *s) {
|
2017-07-15 13:57:52 +02:00
|
|
|
mode_t mode;
|
2013-12-11 20:13:44 +01:00
|
|
|
int r;
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
assert(s);
|
|
|
|
|
2017-07-15 13:57:52 +02:00
|
|
|
if (s->read_kmsg)
|
|
|
|
mode = O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY;
|
|
|
|
else
|
|
|
|
mode = O_WRONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY;
|
|
|
|
|
|
|
|
s->dev_kmsg_fd = open("/dev/kmsg", mode);
|
2012-08-22 03:09:44 +02:00
|
|
|
if (s->dev_kmsg_fd < 0) {
|
2013-12-17 19:56:06 +01:00
|
|
|
log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
|
|
|
|
"Failed to open /dev/kmsg, ignoring: %m");
|
2012-08-22 03:09:44 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-07-15 13:57:52 +02:00
|
|
|
if (!s->read_kmsg)
|
|
|
|
return 0;
|
|
|
|
|
2014-02-19 23:54:58 +01:00
|
|
|
r = sd_event_add_io(s->event, &s->dev_kmsg_event_source, s->dev_kmsg_fd, EPOLLIN, dispatch_dev_kmsg, s);
|
2013-12-11 20:13:44 +01:00
|
|
|
if (r < 0) {
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
/* This will fail with EPERM on older kernels where
|
|
|
|
* /dev/kmsg is not readable. */
|
2013-12-17 19:57:13 +01:00
|
|
|
if (r == -EPERM) {
|
|
|
|
r = 0;
|
|
|
|
goto fail;
|
|
|
|
}
|
2012-08-22 03:09:44 +02:00
|
|
|
|
2014-11-28 13:19:16 +01:00
|
|
|
log_error_errno(r, "Failed to add /dev/kmsg fd to event loop: %m");
|
2013-12-17 19:57:13 +01:00
|
|
|
goto fail;
|
2013-12-11 20:13:44 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
r = sd_event_source_set_priority(s->dev_kmsg_event_source, SD_EVENT_PRIORITY_IMPORTANT+10);
|
|
|
|
if (r < 0) {
|
2014-11-28 13:19:16 +01:00
|
|
|
log_error_errno(r, "Failed to adjust priority of kmsg event source: %m");
|
2013-12-17 19:57:13 +01:00
|
|
|
goto fail;
|
2012-08-22 03:09:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
s->dev_kmsg_readable = true;
|
|
|
|
|
|
|
|
return 0;
|
2013-12-17 19:57:13 +01:00
|
|
|
|
|
|
|
fail:
|
2014-03-18 19:22:43 +01:00
|
|
|
s->dev_kmsg_event_source = sd_event_source_unref(s->dev_kmsg_event_source);
|
|
|
|
s->dev_kmsg_fd = safe_close(s->dev_kmsg_fd);
|
2013-12-17 19:57:13 +01:00
|
|
|
|
|
|
|
return r;
|
2012-08-22 03:09:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
int server_open_kernel_seqnum(Server *s) {
|
2014-03-18 19:22:43 +01:00
|
|
|
_cleanup_close_ int fd;
|
2012-08-22 03:09:44 +02:00
|
|
|
uint64_t *p;
|
2015-11-05 13:44:07 +01:00
|
|
|
int r;
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
/* We store the seqnum we last read in an mmaped file. That
|
|
|
|
* way we can just use it like a variable, but it is
|
2012-10-02 09:38:37 +02:00
|
|
|
* persistent and automatically flushed at reboot. */
|
2012-08-22 03:09:44 +02:00
|
|
|
|
|
|
|
fd = open("/run/systemd/journal/kernel-seqnum", O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0644);
|
|
|
|
if (fd < 0) {
|
2014-11-28 19:29:59 +01:00
|
|
|
log_error_errno(errno, "Failed to open /run/systemd/journal/kernel-seqnum, ignoring: %m");
|
2012-08-22 03:09:44 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-11-05 13:44:07 +01:00
|
|
|
r = posix_fallocate(fd, 0, sizeof(uint64_t));
|
|
|
|
if (r != 0) {
|
|
|
|
log_error_errno(r, "Failed to allocate sequential number file, ignoring: %m");
|
2012-08-22 03:09:44 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
p = mmap(NULL, sizeof(uint64_t), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
|
|
|
|
if (p == MAP_FAILED) {
|
2014-11-28 19:29:59 +01:00
|
|
|
log_error_errno(errno, "Failed to map sequential number file, ignoring: %m");
|
2012-08-22 03:09:44 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->kernel_seqnum = p;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|