/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- Copyright 2013 Zbigniew Jędrzejewski-Szmek
- Copyright 2018 Dell Inc.
+ Copyright © 2018 Dell Inc.
***/
#include <errno.h>
+#include <fcntl.h>
#include <linux/fs.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
#include <syslog.h>
#include <unistd.h>
#include "conf-parser.h"
#include "def.h"
#include "env-util.h"
+#include "errno-util.h"
#include "fd-util.h"
#include "fileio.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"
+#include "time-util.h"
-int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t *_delay) {
+int parse_sleep_config(SleepConfig **ret_sleep_config) {
+ _cleanup_(free_sleep_configp) SleepConfig *sc;
+ int allow_suspend = -1, allow_hibernate = -1,
+ allow_s2h = -1, allow_hybrid_sleep = -1;
- _cleanup_strv_free_ char
- **suspend_mode = NULL, **suspend_state = NULL,
- **hibernate_mode = NULL, **hibernate_state = NULL,
- **hybrid_mode = NULL, **hybrid_state = NULL;
- _cleanup_strv_free_ char **modes, **states; /* always initialized below */
- usec_t delay = 180 * USEC_PER_MINUTE;
+ sc = new0(SleepConfig, 1);
+ if (!sc)
+ return log_oom();
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, &sc->suspend_modes },
+ { "Sleep", "SuspendState", config_parse_strv, 0, &sc->suspend_states },
+ { "Sleep", "HibernateMode", config_parse_strv, 0, &sc->hibernate_modes },
+ { "Sleep", "HibernateState", config_parse_strv, 0, &sc->hibernate_states },
+ { "Sleep", "HybridSleepMode", config_parse_strv, 0, &sc->hybrid_modes },
+ { "Sleep", "HybridSleepState", config_parse_strv, 0, &sc->hybrid_states },
+
+ { "Sleep", "HibernateDelaySec", config_parse_sec, 0, &sc->hibernate_delay_sec},
{}
};
"Sleep\0", config_item_table_lookup, items,
CONFIG_PARSE_WARN, NULL);
- if (streq(verb, "suspend")) {
- /* empty by default */
- modes = TAKE_PTR(suspend_mode);
-
- if (suspend_state)
- states = TAKE_PTR(suspend_state);
- else
- states = strv_new("mem", "standby", "freeze", NULL);
-
- } else if (streq(verb, "hibernate")) {
- if (hibernate_mode)
- modes = TAKE_PTR(hibernate_mode);
- else
- modes = strv_new("platform", "shutdown", NULL);
-
- if (hibernate_state)
- states = TAKE_PTR(hibernate_state);
- else
- states = strv_new("disk", NULL);
-
- } else if (streq(verb, "hybrid-sleep")) {
- if (hybrid_mode)
- modes = TAKE_PTR(hybrid_mode);
- else
- modes = strv_new("suspend", "platform", "shutdown", NULL);
-
- if (hybrid_state)
- states = TAKE_PTR(hybrid_state);
- else
- states = strv_new("disk", NULL);
-
- } else if (streq(verb, "suspend-then-hibernate"))
- modes = states = NULL;
- else
- assert_not_reached("what verb");
-
- if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) ||
- (!states && !streq(verb, "suspend-then-hibernate")))
+ /* use default values unless set */
+ sc->allow_suspend = allow_suspend != 0;
+ sc->allow_hibernate = allow_hibernate != 0;
+ sc->allow_hybrid_sleep = allow_hybrid_sleep >= 0 ? allow_hybrid_sleep
+ : (allow_suspend != 0 && allow_hibernate != 0);
+ sc->allow_s2h = allow_s2h >= 0 ? allow_s2h
+ : (allow_suspend != 0 && allow_hibernate != 0);
+
+ if (!sc->suspend_states)
+ sc->suspend_states = strv_new("mem", "standby", "freeze");
+ if (!sc->hibernate_modes)
+ sc->hibernate_modes = strv_new("platform", "shutdown");
+ if (!sc->hibernate_states)
+ sc->hibernate_states = strv_new("disk");
+ if (!sc->hybrid_modes)
+ sc->hybrid_modes = strv_new("suspend", "platform", "shutdown");
+ if (!sc->hybrid_states)
+ sc->hybrid_states = strv_new("disk");
+ if (sc->hibernate_delay_sec == 0)
+ sc->hibernate_delay_sec = 2 * USEC_PER_HOUR;
+
+ /* ensure values set for all required fields */
+ if (!sc->suspend_states || !sc->hibernate_modes
+ || !sc->hibernate_states || !sc->hybrid_modes || !sc->hybrid_states)
return log_oom();
- if (_modes)
- *_modes = TAKE_PTR(modes);
- if (_states)
- *_states = TAKE_PTR(states);
- if (_delay)
- *_delay = delay;
+ *ret_sleep_config = TAKE_PTR(sc);
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;
if (!f) {
log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
"Failed to retrieve open /proc/swaps: %m");
- assert(errno > 0);
- return -errno;
+ return negative_errno();
}
(void) fscanf(f, "%*s %*s %*s %*s %*s\n");
+ // TODO: sort swaps in priority order rather than using first successful option
for (i = 1;; i++) {
_cleanup_free_ char *dev_field = NULL, *type_field = NULL;
size_t size_field, used_field;
"%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 bool can_s2h(void) {
+static int can_sleep_internal(const char *verb, bool check_allowed, const SleepConfig *sleep_config);
+
+static bool can_s2h(const SleepConfig *sleep_config) {
const char *p;
int r;
- r = access("/sys/class/rtc/rtc0/wakealarm", W_OK);
- if (r < 0) {
+ if (!clock_supported(CLOCK_BOOTTIME_ALARM)) {
log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
- "/sys/class/rct/rct0/wakealarm is not writable %m");
+ "CLOCK_BOOTTIME_ALARM is not supported");
return false;
}
FOREACH_STRING(p, "suspend", "hibernate") {
- r = can_sleep(p);
- if (IN_SET(r, 0, -ENOSPC)) {
+ r = can_sleep_internal(p, false, sleep_config);
+ if (IN_SET(r, 0, -ENOSPC, -EADV)) {
log_debug("Unable to %s system.", p);
return false;
}
return true;
}
-int can_sleep(const char *verb) {
- _cleanup_strv_free_ char **modes = NULL, **states = NULL;
+static int can_sleep_internal(const char *verb, bool check_allowed, const SleepConfig *sleep_config) {
+ bool allow;
+ 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 = sleep_settings(verb, sleep_config, &allow, &modes, &states);
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(sleep_config);
+
if (!can_sleep_state(states) || !can_sleep_disk(modes))
return false;
return true;
}
+
+int can_sleep(const char *verb) {
+ _cleanup_(free_sleep_configp) SleepConfig *sleep_config = NULL;
+ int r;
+
+ r = parse_sleep_config(&sleep_config);
+ if (r < 0)
+ return r;
+
+ return can_sleep_internal(verb, true, sleep_config);
+}
+
+int sleep_settings(const char *verb, const SleepConfig *sleep_config, bool *ret_allow, char ***ret_modes, char ***ret_states) {
+
+ assert(verb);
+ assert(sleep_config);
+ assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"));
+
+ if (streq(verb, "suspend")) {
+ *ret_allow = sleep_config->allow_suspend;
+ *ret_modes = sleep_config->suspend_modes;
+ *ret_states = sleep_config->suspend_states;
+ } else if (streq(verb, "hibernate")) {
+ *ret_allow = sleep_config->allow_hibernate;
+ *ret_modes = sleep_config->hibernate_modes;
+ *ret_states = sleep_config->hibernate_states;
+ } else if (streq(verb, "hybrid-sleep")) {
+ *ret_allow = sleep_config->allow_hybrid_sleep;
+ *ret_modes = sleep_config->hybrid_modes;
+ *ret_states = sleep_config->hybrid_states;
+ } else if (streq(verb, "suspend-then-hibernate")) {
+ *ret_allow = sleep_config->allow_s2h;
+ *ret_modes = *ret_states = NULL;
+ }
+
+ /* suspend modes empty by default */
+ if ((!ret_modes && !streq(verb, "suspend")) || !ret_states)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No modes or states set for %s; Check sleep.conf", verb);
+
+ return 0;
+}
+
+void free_sleep_config(SleepConfig *sc) {
+ if (!sc)
+ return;
+
+ strv_free(sc->suspend_modes);
+ strv_free(sc->suspend_states);
+
+ strv_free(sc->hibernate_modes);
+ strv_free(sc->hibernate_states);
+
+ strv_free(sc->hybrid_modes);
+ strv_free(sc->hybrid_states);
+
+ free(sc);
+}
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