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-rw-r--r--src/sleep/sleep.c198
1 files changed, 165 insertions, 33 deletions
diff --git a/src/sleep/sleep.c b/src/sleep/sleep.c
index 518032ec69..f26aa453c9 100644
--- a/src/sleep/sleep.c
+++ b/src/sleep/sleep.c
@@ -1,42 +1,91 @@
/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
- Copyright 2013 Zbigniew Jędrzejewski-Szmek
-
- 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 © 2010-2017 Canonical
+ Copyright © 2018 Dell Inc.
***/
#include <errno.h>
#include <getopt.h>
+#include <linux/fiemap.h>
#include <stdio.h>
#include "sd-messages.h"
+#include "parse-util.h"
#include "def.h"
#include "exec-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "sleep-config.h"
+#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "util.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;
@@ -54,9 +103,6 @@ static int write_mode(char **modes) {
r = k;
}
- if (r < 0)
- log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
-
return r;
}
@@ -78,7 +124,7 @@ static int write_state(FILE **f, char **states) {
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;
@@ -107,27 +153,30 @@ static int execute(char **modes, char **states) {
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);
@@ -135,6 +184,83 @@ static int execute(char **modes, char **states) {
return r;
}
+static int read_wakealarm(uint64_t *result) {
+ _cleanup_free_ char *t = NULL;
+
+ if (read_one_line_file("/sys/class/rtc/rtc0/since_epoch", &t) >= 0)
+ return safe_atou64(t, result);
+ return -EBADF;
+}
+
+static int write_wakealarm(const char *str) {
+
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ f = fopen("/sys/class/rtc/rtc0/wakealarm", "we");
+ if (!f)
+ return log_error_errno(errno, "Failed to open /sys/class/rtc/rtc0/wakealarm: %m");
+
+ r = write_string_stream(f, str, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write '%s' to /sys/class/rtc/rtc0/wakealarm: %m", str);
+
+ return 0;
+}
+
+static int execute_s2h(usec_t hibernate_delay_sec) {
+
+ _cleanup_strv_free_ char **hibernate_modes = NULL, **hibernate_states = NULL,
+ **suspend_modes = NULL, **suspend_states = NULL;
+ usec_t orig_time, cmp_time;
+ char time_str[DECIMAL_STR_MAX(uint64_t)];
+ int r;
+
+ r = parse_sleep_config("suspend", &suspend_modes, &suspend_states,
+ NULL);
+ if (r < 0)
+ return r;
+
+ r = parse_sleep_config("hibernate", &hibernate_modes,
+ &hibernate_states, NULL);
+ if (r < 0)
+ return r;
+
+ r = read_wakealarm(&orig_time);
+ if (r < 0)
+ return log_error_errno(errno, "Failed to read time: %d", r);
+
+ orig_time += hibernate_delay_sec / USEC_PER_SEC;
+ xsprintf(time_str, "%" PRIu64, orig_time);
+
+ r = write_wakealarm(time_str);
+ if (r < 0)
+ return r;
+
+ log_debug("Set RTC wake alarm for %s", time_str);
+
+ r = execute(suspend_modes, suspend_states);
+ if (r < 0)
+ return r;
+
+ r = read_wakealarm(&cmp_time);
+ if (r < 0)
+ return log_error_errno(errno, "Failed to read time: %d", r);
+
+ /* reset RTC */
+ r = write_wakealarm("0");
+ if (r < 0)
+ return r;
+
+ log_debug("Woke up at %"PRIu64, cmp_time);
+
+ /* if woken up after alarm time, hibernate */
+ if (cmp_time >= orig_time)
+ r = execute(hibernate_modes, hibernate_states);
+
+ return r;
+}
+
static void help(void) {
printf("%s COMMAND\n\n"
"Suspend the system, hibernate the system, or both.\n\n"
@@ -144,6 +270,8 @@ static void help(void) {
" suspend Suspend the system\n"
" hibernate Hibernate the system\n"
" hybrid-sleep Both hibernate and suspend the system\n"
+ " suspend-then-hibernate Initially suspend and then hibernate\n"
+ " the system after a fixed period of time\n"
, program_invocation_short_name);
}
@@ -189,7 +317,8 @@ static int parse_argv(int argc, char *argv[]) {
if (!streq(arg_verb, "suspend") &&
!streq(arg_verb, "hibernate") &&
- !streq(arg_verb, "hybrid-sleep")) {
+ !streq(arg_verb, "hybrid-sleep") &&
+ !streq(arg_verb, "suspend-then-hibernate")) {
log_error("Unknown command '%s'.", arg_verb);
return -EINVAL;
}
@@ -199,6 +328,7 @@ static int parse_argv(int argc, char *argv[]) {
int main(int argc, char *argv[]) {
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
+ usec_t delay = 0;
int r;
log_set_target(LOG_TARGET_AUTO);
@@ -209,12 +339,14 @@ int main(int argc, char *argv[]) {
if (r <= 0)
goto finish;
- r = parse_sleep_config(arg_verb, &modes, &states);
+ r = parse_sleep_config(arg_verb, &modes, &states, &delay);
if (r < 0)
goto finish;
- r = execute(modes, states);
-
+ if (streq(arg_verb, "suspend-then-hibernate"))
+ r = execute_s2h(delay);
+ else
+ r = execute(modes, states);
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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