/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
- Copyright 2013 Zbigniew Jędrzejewski-Szmek
- Copyright 2018 Dell Inc.
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ Copyright © 2013 Zbigniew Jędrzejewski-Szmek
+ Copyright © 2010-2017 Canonical
+ Copyright © 2018 Dell Inc.
***/
//#include <errno.h>
//#include <getopt.h>
+//#include <linux/fiemap.h>
//#include <stdio.h>
#include "sd-messages.h"
static char* arg_verb = NULL;
+static int write_hibernate_location_info(void) {
+ _cleanup_free_ char *device = NULL, *type = NULL;
+ _cleanup_free_ struct fiemap *fiemap = NULL;
+ char offset_str[DECIMAL_STR_MAX(uint64_t)];
+ char device_str[DECIMAL_STR_MAX(uint64_t)];
+ _cleanup_close_ int fd = -1;
+ struct stat stb;
+ uint64_t offset;
+ int r;
+
+ r = find_hibernate_location(&device, &type, NULL, NULL);
+ if (r < 0)
+ return log_debug_errno(r, "Unable to find hibernation location: %m");
+
+ /* if it's a swap partition, we just write the disk to /sys/power/resume */
+ if (streq(type, "partition"))
+ return write_string_file("/sys/power/resume", device, 0);
+ else if (!streq(type, "file"))
+ return log_debug_errno(EINVAL, "Invalid hibernate type %s: %m",
+ type);
+
+ /* Only available in 4.17+ */
+ if (access("/sys/power/resume_offset", F_OK) < 0) {
+ if (errno == ENOENT)
+ return 0;
+ return log_debug_errno(errno, "/sys/power/resume_offset unavailable: %m");
+ }
+
+ r = access("/sys/power/resume_offset", W_OK);
+ if (r < 0)
+ return log_debug_errno(errno, "/sys/power/resume_offset not writeable: %m");
+
+ fd = open(device, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
+ if (fd < 0)
+ return log_debug_errno(errno, "Unable to open '%s': %m", device);
+ r = fstat(fd, &stb);
+ if (r < 0)
+ return log_debug_errno(errno, "Unable to stat %s: %m", device);
+ r = read_fiemap(fd, &fiemap);
+ if (r < 0)
+ return log_debug_errno(r, "Unable to read extent map for '%s': %m",
+ device);
+ if (fiemap->fm_mapped_extents == 0) {
+ log_debug("No extents found in '%s'", device);
+ return -EINVAL;
+ }
+ offset = fiemap->fm_extents[0].fe_physical / page_size();
+ xsprintf(offset_str, "%" PRIu64, offset);
+ r = write_string_file("/sys/power/resume_offset", offset_str, 0);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to write offset '%s': %m",
+ offset_str);
+
+ xsprintf(device_str, "%lx", (unsigned long)stb.st_dev);
+ r = write_string_file("/sys/power/resume", device_str, 0);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to write device '%s': %m",
+ device_str);
+ return 0;
+}
+
static int write_mode(char **modes) {
int r = 0;
char **mode;
r = k;
}
- if (r < 0)
- log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
-
return r;
}
fclose(*f);
*f = fopen("/sys/power/state", "we");
if (!*f)
- return log_error_errno(errno, "Failed to open /sys/power/state: %m");
+ return -errno;
}
return r;
return log_error_errno(errno, "Failed to open /sys/power/state: %m");
/* Configure the hibernation mode */
- r = write_mode(modes);
- if (r < 0)
- return r;
+ if (!strv_isempty(modes)) {
+ r = write_hibernate_location_info();
+ if (r < 0)
+ return log_error_errno(r, "Failed to write hibernation disk offset: %m");
+ r = write_mode(modes);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");;
+ }
execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments);
log_struct(LOG_INFO,
"MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
LOG_MESSAGE("Suspending system..."),
- "SLEEP=%s", arg_verb,
- NULL);
+ "SLEEP=%s", arg_verb);
r = write_state(&f, states);
if (r < 0)
- return r;
+ return log_error_errno(r, "Failed to write /sys/power/state: %m");
log_struct(LOG_INFO,
"MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR,
LOG_MESSAGE("System resumed."),
- "SLEEP=%s", arg_verb,
- NULL);
+ "SLEEP=%s", arg_verb);
arguments[1] = (char*) "post";
execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments);
~ianmdlvl / elogind.git / blobdiff