#include <unistd.h>
#include "alloc-util.h"
+#include "btrfs-util.h"
#include "conf-parser.h"
#include "def.h"
#include "env-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "sleep-config.h"
+#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "time-util.h"
-int parse_sleep_config(const char *verb, bool *ret_allow, char ***ret_modes, char ***ret_states, usec_t *ret_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;
- bool allow;
- _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", "AllowSuspend", config_parse_tristate, 0, &allow_suspend },
{ "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", "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, &delay},
+ { "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")) {
- 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");
-
- } else if (streq(verb, "hibernate")) {
- allow = allow_hibernate != 0;
-
- if (hibernate_mode)
- modes = TAKE_PTR(hibernate_mode);
- else
- modes = strv_new("platform", "shutdown");
-
- if (hibernate_state)
- states = TAKE_PTR(hibernate_state);
- else
- 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");
-
- if (hybrid_state)
- states = TAKE_PTR(hybrid_state);
- else
- states = strv_new("disk");
-
- } else if (streq(verb, "suspend-then-hibernate")) {
- allow = allow_s2h > 0 ||
- (allow_suspend != 0 && allow_hibernate != 0);
-
- 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 (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;
+ *ret_sleep_config = TAKE_PTR(sc);
return 0;
}
#define HIBERNATION_SWAP_THRESHOLD 0.98
-int find_hibernate_location(char **device, char **type, size_t *size, size_t *used) {
- _cleanup_fclose_ FILE *f;
+SwapEntry* swap_entry_free(SwapEntry *se) {
+ if (!se)
+ return NULL;
+
+ free(se->device);
+ free(se->type);
+
+ return mfree(se);
+}
+
+HibernateLocation* hibernate_location_free(HibernateLocation *hl) {
+ if (!hl)
+ return NULL;
+
+ swap_entry_free(hl->swap);
+ free(hl->resume);
+
+ return mfree(hl);
+}
+
+static int swap_device_to_major_minor(const SwapEntry *swap, char **ret) {
+ _cleanup_free_ char *major_minor = NULL;
+ _cleanup_close_ int fd = -1;
+ struct stat sb;
+ dev_t swap_dev;
+ int r;
+
+ assert(swap);
+ assert(swap->device);
+ assert(swap->type);
+
+ fd = open(swap->device, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
+ if (fd < 0)
+ return log_debug_errno(errno, "Unable to open '%s': %m", swap->device);
+
+ r = fstat(fd, &sb);
+ if (r < 0)
+ return log_debug_errno(errno, "Unable to stat %s: %m", swap->device);
+
+ swap_dev = streq(swap->type, "partition") ? sb.st_rdev : sb.st_dev;
+ if (asprintf(&major_minor, "%u:%u", major(swap_dev), minor(swap_dev)) < 0)
+ return log_oom();
+
+ *ret = TAKE_PTR(major_minor);
+
+ return 0;
+}
+
+static int calculate_swap_file_offset(const SwapEntry *swap, uint64_t *ret_offset) {
+ _cleanup_close_ int fd = -1;
+ _cleanup_free_ struct fiemap *fiemap = NULL;
+ struct stat sb;
+ int r, btrfs;
+
+ assert(swap);
+ assert(swap->device);
+ assert(streq(swap->type, "file"));
+
+ fd = open(swap->device, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to open %s: %m", swap->device);
+
+ if (fstat(fd, &sb) < 0)
+ return log_error_errno(errno, "Failed to stat %s: %m", swap->device);
+
+ btrfs = btrfs_is_filesystem(fd);
+ if (btrfs < 0)
+ return log_error_errno(btrfs, "Error checking %s for Btrfs filesystem: %m", swap->device);
+ else if (btrfs > 0) {
+ log_debug("Detection of swap file offset on Btrfs is not supported: %s; skipping", swap->device);
+ *ret_offset = 0;
+ return 0;
+ }
+
+ r = read_fiemap(fd, &fiemap);
+ if (r < 0)
+ return log_debug_errno(r, "Unable to read extent map for '%s': %m", swap->device);
+
+ *ret_offset = fiemap->fm_extents[0].fe_physical / page_size();
+
+ return 0;
+}
+
+static int read_resume_files(char **ret_resume, uint64_t *ret_resume_offset) {
+ _cleanup_free_ char *resume, *resume_offset_str = NULL;
+ uint64_t resume_offset = 0;
+ int r;
+
+ r = read_one_line_file("/sys/power/resume", &resume);
+ if (r < 0)
+ return log_debug_errno(r, "Error reading from /sys/power/resume: %m");
+
+ r = read_one_line_file("/sys/power/resume_offset", &resume_offset_str);
+ if (r == -ENOENT)
+ log_debug("Kernel does not support resume_offset; swap file offset detection will be skipped.");
+ else if (r < 0)
+ return log_debug_errno(r, "Error reading from /sys/power/resume_offset: %m");
+ else {
+ r = safe_atou64(resume_offset_str, &resume_offset);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse value in /sys/power/resume_offset \"%s\": %m", resume_offset_str);
+ }
+
+ if (resume_offset > 0 && streq(*ret_resume, "0:0")) {
+ log_debug("Found offset in /sys/power/resume_offset: %" PRIu64 "; no device id found in /sys/power/resume; ignoring resume_offset", resume_offset);
+ resume_offset = 0;
+ }
+
+ *ret_resume = TAKE_PTR(resume);
+ *ret_resume_offset = resume_offset;
+
+ return 0;
+}
+
+static bool location_is_resume_device(const HibernateLocation *location, const char *sys_resume, const uint64_t sys_offset) {
+ assert(location);
+ assert(location->resume);
+ assert(sys_resume);
+
+ return streq(sys_resume, location->resume) && sys_offset == location->resume_offset;
+}
+
+/*
+ * Attempt to find the hibernation location by parsing /proc/swaps, /sys/power/resume, and
+ * /sys/power/resume_offset.
+ *
+ * Returns:
+ * 1 - HibernateLocation matches values found in /sys/power/resume & /sys/power/resume_offset
+ * 0 - HibernateLocation is highest priority swap with most remaining space; no valid values exist in /sys/power/resume & /sys/power/resume_offset
+ * negative value in the case of error
+ */
+int find_hibernate_location(HibernateLocation **ret_hibernate_location) {
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_(hibernate_location_freep) HibernateLocation *hibernate_location = NULL;
+ _cleanup_free_ char *sys_resume = NULL;
+ uint64_t sys_offset = 0;
unsigned i;
+ int r;
+
+ /* read the /sys/power/resume & /sys/power/resume_offset values */
+ r = read_resume_files(&sys_resume, &sys_offset);
+ if (r < 0)
+ return r;
f = fopen("/proc/swaps", "re");
if (!f) {
log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
- "Failed to retrieve open /proc/swaps: %m");
+ "Failed to open /proc/swaps: %m");
return negative_errno();
}
(void) fscanf(f, "%*s %*s %*s %*s %*s\n");
-
for (i = 1;; i++) {
- _cleanup_free_ char *dev_field = NULL, *type_field = NULL;
- size_t size_field, used_field;
+ _cleanup_(swap_entry_freep) SwapEntry *swap = NULL;
+ uint64_t swap_offset = 0;
int k;
+ swap = new0(SwapEntry, 1);
+ if (!swap)
+ return log_oom();
+
k = fscanf(f,
- "%ms " /* device/file */
- "%ms " /* type of swap */
- "%zu " /* swap size */
- "%zu " /* used */
- "%*i\n", /* priority */
- &dev_field, &type_field, &size_field, &used_field);
+ "%ms " /* device/file */
+ "%ms " /* type of swap */
+ "%" PRIu64 /* swap size */
+ "%" PRIu64 /* used */
+ "%i\n", /* priority */
+ &swap->device, &swap->type, &swap->size, &swap->used, &swap->priority);
if (k == EOF)
break;
- if (k != 4) {
+ if (k != 5) {
log_warning("Failed to parse /proc/swaps:%u", i);
continue;
}
- if (streq(type_field, "file")) {
-
- if (endswith(dev_field, "\\040(deleted)")) {
- log_warning("Ignoring deleted swap file '%s'.", dev_field);
+ if (streq(swap->type, "file")) {
+ if (endswith(swap->device, "\\040(deleted)")) {
+ log_warning("Ignoring deleted swap file '%s'.", swap->device);
continue;
}
- } else if (streq(type_field, "partition")) {
+ r = calculate_swap_file_offset(swap, &swap_offset);
+ if (r < 0)
+ return r;
+ } else if (streq(swap->type, "partition")) {
const char *fn;
- fn = path_startswith(dev_field, "/dev/");
+ fn = path_startswith(swap->device, "/dev/");
if (fn && startswith(fn, "zram")) {
- log_debug("Ignoring compressed RAM swap device '%s'.", dev_field);
+ log_debug("Ignoring compressed RAM swap device '%s'.", swap->device);
continue;
}
+ } else {
+ log_debug("Swap type %s is unsupported for hibernation: %s; skipping", swap->type, swap->device);
+ continue;
}
- if (device)
- *device = TAKE_PTR(dev_field);
- if (type)
- *type = TAKE_PTR(type_field);
- if (size)
- *size = size_field;
- if (used)
- *used = used_field;
- return 0;
+ /* prefer resume device or highest priority swap with most remaining space */
+ if (!hibernate_location || swap->priority > hibernate_location->swap->priority
+ || ((swap->priority == hibernate_location->swap->priority)
+ && (swap->size - swap->used) > (hibernate_location->swap->size - hibernate_location->swap->used))) {
+
+ _cleanup_free_ char *swap_device_id = NULL;
+ r = swap_device_to_major_minor(swap, &swap_device_id);
+ if (r < 0)
+ return r;
+
+ hibernate_location = hibernate_location_free(hibernate_location);
+ hibernate_location = new(HibernateLocation, 1);
+ if (!hibernate_location)
+ return log_oom();
+
+ *hibernate_location = (HibernateLocation) {
+ .resume = TAKE_PTR(swap_device_id),
+ .resume_offset = swap_offset,
+ .swap = TAKE_PTR(swap),
+ };
+
+ /* if the swap is the resume device, stop looping swaps */
+ if (location_is_resume_device(hibernate_location, sys_resume, sys_offset))
+ break;
+ }
}
- return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS),
- "No swap partitions were found.");
+ if (!hibernate_location)
+ return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS), "No swap partitions or files were found");
+
+ if (!streq(sys_resume, "0:0") && !location_is_resume_device(hibernate_location, sys_resume, sys_offset))
+ return log_warning_errno(SYNTHETIC_ERRNO(ENOSYS), "/sys/power/resume and /sys/power/resume_offset has no matching entry in /proc/swaps; Hibernation will fail: resume=%s, resume_offset=%" PRIu64,
+ sys_resume, sys_offset);
+
+ log_debug("Hibernation will attempt to use swap entry with path: %s, device: %s, offset: %" PRIu64 ", priority: %i",
+ hibernate_location->swap->device, hibernate_location->resume, hibernate_location->resume_offset, hibernate_location->swap->priority);
+
+ *ret_hibernate_location = TAKE_PTR(hibernate_location);
+
+ if (location_is_resume_device(*ret_hibernate_location, sys_resume, sys_offset))
+ return 1;
+
+ return 0;
}
static bool enough_swap_for_hibernation(void) {
_cleanup_free_ char *active = NULL;
+ _cleanup_(hibernate_location_freep) HibernateLocation *hibernate_location = 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 = find_hibernate_location(NULL, NULL, &size, &used);
+ r = find_hibernate_location(&hibernate_location);
if (r < 0)
return false;
return false;
}
- r = act <= (size - used) * 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);
+ r = act <= (hibernate_location->swap->size - hibernate_location->swap->used) * HIBERNATION_SWAP_THRESHOLD;
+ log_debug("%s swap for hibernation, Active(anon)=%llu kB, size=%" PRIu64 " kB, used=%" PRIu64 " kB, threshold=%.2g%%",
+ r ? "Enough" : "Not enough", act, hibernate_location->swap->size, hibernate_location->swap->used, 100*HIBERNATION_SWAP_THRESHOLD);
return r;
}
return 0;
}
-static int can_sleep_internal(const char *verb, bool check_allowed);
+static int can_sleep_internal(const char *verb, bool check_allowed, const SleepConfig *sleep_config);
-static bool can_s2h(void) {
+static bool can_s2h(const SleepConfig *sleep_config) {
const char *p;
int r;
}
FOREACH_STRING(p, "suspend", "hibernate") {
- r = can_sleep_internal(p, false);
+ 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;
}
-static int can_sleep_internal(const char *verb, bool check_allowed) {
+static int can_sleep_internal(const char *verb, bool check_allowed, const SleepConfig *sleep_config) {
bool allow;
- _cleanup_strv_free_ char **modes = NULL, **states = NULL;
+ char **modes = NULL, **states = NULL;
int r;
assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"));
- r = parse_sleep_config(verb, &allow, &modes, &states, NULL);
+ r = sleep_settings(verb, sleep_config, &allow, &modes, &states);
if (r < 0)
return false;
}
if (streq(verb, "suspend-then-hibernate"))
- return can_s2h();
+ return can_s2h(sleep_config);
if (!can_sleep_state(states) || !can_sleep_disk(modes))
return false;
}
int can_sleep(const char *verb) {
- return can_sleep_internal(verb, true);
+ _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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