mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 16:59:03 +03:00
279 lines
8.8 KiB
C
279 lines
8.8 KiB
C
/***
|
|
This file is part of systemd.
|
|
|
|
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/>.
|
|
***/
|
|
|
|
#include <errno.h>
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <unistd.h>
|
|
|
|
#include "alloc-util.h"
|
|
#include "conf-parser.h"
|
|
#include "def.h"
|
|
#include "env-util.h"
|
|
#include "fd-util.h"
|
|
#include "fileio.h"
|
|
#include "log.h"
|
|
#include "macro.h"
|
|
#include "parse-util.h"
|
|
#include "sleep-config.h"
|
|
#include "string-util.h"
|
|
#include "strv.h"
|
|
|
|
#define USE(x, y) do { (x) = (y); (y) = NULL; } while (0)
|
|
|
|
int parse_sleep_config(const char *verb, char ***_modes, char ***_states) {
|
|
|
|
_cleanup_strv_free_ char
|
|
**suspend_mode = NULL, **suspend_state = NULL,
|
|
**hibernate_mode = NULL, **hibernate_state = NULL,
|
|
**hybrid_mode = NULL, **hybrid_state = NULL;
|
|
char **modes, **states;
|
|
|
|
const ConfigTableItem items[] = {
|
|
{ "Sleep", "SuspendMode", config_parse_strv, 0, &suspend_mode },
|
|
{ "Sleep", "SuspendState", config_parse_strv, 0, &suspend_state },
|
|
{ "Sleep", "HibernateMode", config_parse_strv, 0, &hibernate_mode },
|
|
{ "Sleep", "HibernateState", config_parse_strv, 0, &hibernate_state },
|
|
{ "Sleep", "HybridSleepMode", config_parse_strv, 0, &hybrid_mode },
|
|
{ "Sleep", "HybridSleepState", config_parse_strv, 0, &hybrid_state },
|
|
{}
|
|
};
|
|
|
|
config_parse_many_nulstr(PKGSYSCONFDIR "/sleep.conf",
|
|
CONF_PATHS_NULSTR("systemd/sleep.conf.d"),
|
|
"Sleep\0", config_item_table_lookup, items,
|
|
false, NULL);
|
|
|
|
if (streq(verb, "suspend")) {
|
|
/* empty by default */
|
|
USE(modes, suspend_mode);
|
|
|
|
if (suspend_state)
|
|
USE(states, suspend_state);
|
|
else
|
|
states = strv_new("mem", "standby", "freeze", NULL);
|
|
|
|
} else if (streq(verb, "hibernate")) {
|
|
if (hibernate_mode)
|
|
USE(modes, hibernate_mode);
|
|
else
|
|
modes = strv_new("platform", "shutdown", NULL);
|
|
|
|
if (hibernate_state)
|
|
USE(states, hibernate_state);
|
|
else
|
|
states = strv_new("disk", NULL);
|
|
|
|
} else if (streq(verb, "hybrid-sleep")) {
|
|
if (hybrid_mode)
|
|
USE(modes, hybrid_mode);
|
|
else
|
|
modes = strv_new("suspend", "platform", "shutdown", NULL);
|
|
|
|
if (hybrid_state)
|
|
USE(states, hybrid_state);
|
|
else
|
|
states = strv_new("disk", NULL);
|
|
|
|
} else
|
|
assert_not_reached("what verb");
|
|
|
|
if ((!modes && !streq(verb, "suspend")) || !states) {
|
|
strv_free(modes);
|
|
strv_free(states);
|
|
return log_oom();
|
|
}
|
|
|
|
*_modes = modes;
|
|
*_states = states;
|
|
return 0;
|
|
}
|
|
|
|
int can_sleep_state(char **types) {
|
|
char **type;
|
|
int r;
|
|
_cleanup_free_ char *p = NULL;
|
|
|
|
if (strv_isempty(types))
|
|
return true;
|
|
|
|
/* If /sys is read-only we cannot sleep */
|
|
if (access("/sys/power/state", W_OK) < 0)
|
|
return false;
|
|
|
|
r = read_one_line_file("/sys/power/state", &p);
|
|
if (r < 0)
|
|
return false;
|
|
|
|
STRV_FOREACH(type, types) {
|
|
const char *word, *state;
|
|
size_t l, k;
|
|
|
|
k = strlen(*type);
|
|
FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state)
|
|
if (l == k && memcmp(word, *type, l) == 0)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int can_sleep_disk(char **types) {
|
|
char **type;
|
|
int r;
|
|
_cleanup_free_ char *p = NULL;
|
|
|
|
if (strv_isempty(types))
|
|
return true;
|
|
|
|
/* If /sys is read-only we cannot sleep */
|
|
if (access("/sys/power/disk", W_OK) < 0)
|
|
return false;
|
|
|
|
r = read_one_line_file("/sys/power/disk", &p);
|
|
if (r < 0)
|
|
return false;
|
|
|
|
STRV_FOREACH(type, types) {
|
|
const char *word, *state;
|
|
size_t l, k;
|
|
|
|
k = strlen(*type);
|
|
FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) {
|
|
if (l == k && memcmp(word, *type, l) == 0)
|
|
return true;
|
|
|
|
if (l == k + 2 &&
|
|
word[0] == '[' &&
|
|
memcmp(word + 1, *type, l - 2) == 0 &&
|
|
word[l-1] == ']')
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#define HIBERNATION_SWAP_THRESHOLD 0.98
|
|
|
|
static int hibernation_partition_size(size_t *size, size_t *used) {
|
|
_cleanup_fclose_ FILE *f;
|
|
unsigned i;
|
|
|
|
assert(size);
|
|
assert(used);
|
|
|
|
f = fopen("/proc/swaps", "re");
|
|
if (!f) {
|
|
log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
|
|
"Failed to retrieve open /proc/swaps: %m");
|
|
assert(errno > 0);
|
|
return -errno;
|
|
}
|
|
|
|
(void) fscanf(f, "%*s %*s %*s %*s %*s\n");
|
|
|
|
for (i = 1;; i++) {
|
|
_cleanup_free_ char *dev = NULL, *type = NULL;
|
|
size_t size_field, used_field;
|
|
int k;
|
|
|
|
k = fscanf(f,
|
|
"%ms " /* device/file */
|
|
"%ms " /* type of swap */
|
|
"%zu " /* swap size */
|
|
"%zu " /* used */
|
|
"%*i\n", /* priority */
|
|
&dev, &type, &size_field, &used_field);
|
|
if (k != 4) {
|
|
if (k == EOF)
|
|
break;
|
|
|
|
log_warning("Failed to parse /proc/swaps:%u", i);
|
|
continue;
|
|
}
|
|
|
|
if (streq(type, "partition") && endswith(dev, "\\040(deleted)")) {
|
|
log_warning("Ignoring deleted swapfile '%s'.", dev);
|
|
continue;
|
|
}
|
|
|
|
*size = size_field;
|
|
*used = used_field;
|
|
return 0;
|
|
}
|
|
|
|
log_debug("No swap partitions were found.");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static bool enough_memory_for_hibernation(void) {
|
|
_cleanup_free_ char *active = NULL;
|
|
unsigned long long act = 0;
|
|
size_t size = 0, used = 0;
|
|
int r;
|
|
|
|
if (getenv_bool("SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK") > 0)
|
|
return true;
|
|
|
|
r = hibernation_partition_size(&size, &used);
|
|
if (r < 0)
|
|
return false;
|
|
|
|
r = get_proc_field("/proc/meminfo", "Active(anon)", WHITESPACE, &active);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to retrieve Active(anon) from /proc/meminfo: %m");
|
|
return false;
|
|
}
|
|
|
|
r = safe_atollu(active, &act);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to parse Active(anon) from /proc/meminfo: %s: %m",
|
|
active);
|
|
return false;
|
|
}
|
|
|
|
r = act <= (size - used) * HIBERNATION_SWAP_THRESHOLD;
|
|
log_debug("Hibernation is %spossible, Active(anon)=%llu kB, size=%zu kB, used=%zu kB, threshold=%.2g%%",
|
|
r ? "" : "im", act, size, used, 100*HIBERNATION_SWAP_THRESHOLD);
|
|
|
|
return r;
|
|
}
|
|
|
|
int can_sleep(const char *verb) {
|
|
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
|
|
int r;
|
|
|
|
assert(streq(verb, "suspend") ||
|
|
streq(verb, "hibernate") ||
|
|
streq(verb, "hybrid-sleep"));
|
|
|
|
r = parse_sleep_config(verb, &modes, &states);
|
|
if (r < 0)
|
|
return false;
|
|
|
|
if (!can_sleep_state(states) || !can_sleep_disk(modes))
|
|
return false;
|
|
|
|
return streq(verb, "suspend") || enough_memory_for_hibernation();
|
|
}
|