/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- Copyright 2013 Zbigniew Jędrzejewski-Szmek
- Copyright 2018 Dell Inc.
+ Copyright © 2018 Dell Inc.
***/
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
+#include <sys/ioctl.h>
#include <syslog.h>
#include <unistd.h>
#include "log.h"
#include "macro.h"
#include "parse-util.h"
+#include "path-util.h"
#include "sleep-config.h"
#include "string-util.h"
#include "strv.h"
-int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t *_delay) {
-
+int parse_sleep_config(const char *verb, bool *ret_allow, char ***ret_modes, char ***ret_states, usec_t *ret_delay) {
+ int allow_suspend = -1, allow_hibernate = -1,
+ allow_s2h = -1, allow_hybrid_sleep = -1;
+ bool allow;
_cleanup_strv_free_ char
**suspend_mode = NULL, **suspend_state = NULL,
**hibernate_mode = NULL, **hibernate_state = NULL,
usec_t delay = 180 * USEC_PER_MINUTE;
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 },
- { "Sleep", "HibernateDelaySec", config_parse_sec, 0, &delay},
+ { "Sleep", "AllowSuspend", config_parse_tristate, 0, &allow_suspend },
+ { "Sleep", "AllowHibernation", config_parse_tristate, 0, &allow_hibernate },
+ { "Sleep", "AllowSuspendThenHibernate", config_parse_tristate, 0, &allow_s2h },
+ { "Sleep", "AllowHybridSleep", config_parse_tristate, 0, &allow_hybrid_sleep },
+
+ { "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 },
+
+ { "Sleep", "HibernateDelaySec", config_parse_sec, 0, &delay},
{}
};
CONFIG_PARSE_WARN, NULL);
if (streq(verb, "suspend")) {
+ allow = allow_suspend != 0;
+
/* empty by default */
modes = TAKE_PTR(suspend_mode);
if (suspend_state)
states = TAKE_PTR(suspend_state);
else
- states = strv_new("mem", "standby", "freeze", NULL);
+ states = strv_new("mem", "standby", "freeze");
} else if (streq(verb, "hibernate")) {
+ allow = allow_hibernate != 0;
+
if (hibernate_mode)
modes = TAKE_PTR(hibernate_mode);
else
- modes = strv_new("platform", "shutdown", NULL);
+ modes = strv_new("platform", "shutdown");
if (hibernate_state)
states = TAKE_PTR(hibernate_state);
else
- states = strv_new("disk", NULL);
+ states = strv_new("disk");
} else if (streq(verb, "hybrid-sleep")) {
+ allow = allow_hybrid_sleep > 0 ||
+ (allow_suspend != 0 && allow_hibernate != 0);
+
if (hybrid_mode)
modes = TAKE_PTR(hybrid_mode);
else
- modes = strv_new("suspend", "platform", "shutdown", NULL);
+ modes = strv_new("suspend", "platform", "shutdown");
if (hybrid_state)
states = TAKE_PTR(hybrid_state);
else
- states = strv_new("disk", NULL);
+ states = strv_new("disk");
+
+ } else if (streq(verb, "suspend-then-hibernate")) {
+ allow = allow_s2h > 0 ||
+ (allow_suspend != 0 && allow_hibernate != 0);
- } else if (streq(verb, "suspend-then-hibernate"))
modes = states = NULL;
- else
+ } else
assert_not_reached("what verb");
if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) ||
(!states && !streq(verb, "suspend-then-hibernate")))
return log_oom();
- if (_modes)
- *_modes = TAKE_PTR(modes);
- if (_states)
- *_states = TAKE_PTR(states);
- if (_delay)
- *_delay = delay;
+ if (ret_allow)
+ *ret_allow = allow;
+ if (ret_modes)
+ *ret_modes = TAKE_PTR(modes);
+ if (ret_states)
+ *ret_states = TAKE_PTR(states);
+ if (ret_delay)
+ *ret_delay = delay;
return 0;
}
return true;
/* If /sys is read-only we cannot sleep */
- if (access("/sys/power/disk", W_OK) < 0)
+ if (access("/sys/power/disk", W_OK) < 0) {
+ log_debug_errno(errno, "/sys/power/disk is not writable: %m");
return false;
+ }
r = read_one_line_file("/sys/power/disk", &p);
- if (r < 0)
+ if (r < 0) {
+ log_debug_errno(r, "Couldn't read /sys/power/disk: %m");
return false;
+ }
STRV_FOREACH(type, types) {
const char *word, *state;
"%zu " /* used */
"%*i\n", /* priority */
&dev_field, &type_field, &size_field, &used_field);
+ if (k == EOF)
+ break;
if (k != 4) {
- if (k == EOF)
- break;
-
log_warning("Failed to parse /proc/swaps:%u", i);
continue;
}
- if (streq(type_field, "partition") && endswith(dev_field, "\\040(deleted)")) {
- log_warning("Ignoring deleted swapfile '%s'.", dev_field);
- continue;
+ if (streq(type_field, "file")) {
+
+ if (endswith(dev_field, "\\040(deleted)")) {
+ log_warning("Ignoring deleted swap file '%s'.", dev_field);
+ continue;
+ }
+
+ } else if (streq(type_field, "partition")) {
+ const char *fn;
+
+ fn = path_startswith(dev_field, "/dev/");
+ if (fn && startswith(fn, "zram")) {
+ log_debug("Ignoring compressed RAM swap device '%s'.", dev_field);
+ continue;
+ }
}
+
if (device)
*device = TAKE_PTR(dev_field);
if (type)
return 0;
}
- log_debug("No swap partitions were found.");
- return -ENOSYS;
+ return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS),
+ "No swap partitions were found.");
}
static bool enough_swap_for_hibernation(void) {
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");
+ log_debug_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);
+ log_debug_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);
+ log_debug("%s swap for hibernation, Active(anon)=%llu kB, size=%zu kB, used=%zu kB, threshold=%.2g%%",
+ r ? "Enough" : "Not enough", act, size, used, 100*HIBERNATION_SWAP_THRESHOLD);
return r;
}
return 0;
}
+static int can_sleep_internal(const char *verb, bool check_allowed);
+
static bool can_s2h(void) {
const char *p;
int r;
}
FOREACH_STRING(p, "suspend", "hibernate") {
- r = can_sleep(p);
- if (IN_SET(r, 0, -ENOSPC)) {
+ r = can_sleep_internal(p, false);
+ if (IN_SET(r, 0, -ENOSPC, -EADV)) {
log_debug("Unable to %s system.", p);
return false;
}
return true;
}
-int can_sleep(const char *verb) {
+static int can_sleep_internal(const char *verb, bool check_allowed) {
+ bool allow;
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
int r;
assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"));
- if (streq(verb, "suspend-then-hibernate"))
- return can_s2h();
-
- r = parse_sleep_config(verb, &modes, &states, NULL);
+ r = parse_sleep_config(verb, &allow, &modes, &states, NULL);
if (r < 0)
return false;
+ if (check_allowed && !allow) {
+ log_debug("Sleep mode \"%s\" is disabled by configuration.", verb);
+ return false;
+ }
+
+ if (streq(verb, "suspend-then-hibernate"))
+ return can_s2h();
+
if (!can_sleep_state(states) || !can_sleep_disk(modes))
return false;
return true;
}
+
+int can_sleep(const char *verb) {
+ return can_sleep_internal(verb, true);
+}
projects / thirdparty / systemd.git / blobdiff