+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- 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/>.
+ Copyright © 2018 Dell Inc.
***/
#include <errno.h>
+#include <linux/fs.h>
#include <stdbool.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"
-#define USE(x, y) do { (x) = (y); (y) = NULL; } while (0)
-
-int parse_sleep_config(const char *verb, char ***_modes, char ***_states) {
-
+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,
**hybrid_mode = NULL, **hybrid_state = NULL;
- char **modes, **states;
+ _cleanup_strv_free_ char **modes, **states; /* always initialized below */
+ 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", "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 */
- USE(modes, suspend_mode);
+ modes = TAKE_PTR(suspend_mode);
if (suspend_state)
- USE(states, 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)
- USE(modes, hibernate_mode);
+ modes = TAKE_PTR(hibernate_mode);
else
- modes = strv_new("platform", "shutdown", NULL);
+ modes = strv_new("platform", "shutdown");
if (hibernate_state)
- USE(states, 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)
- USE(modes, hybrid_mode);
+ modes = TAKE_PTR(hybrid_mode);
else
- modes = strv_new("suspend", "platform", "shutdown", NULL);
+ modes = strv_new("suspend", "platform", "shutdown");
if (hybrid_state)
- USE(states, 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);
+
+ modes = states = NULL;
} else
assert_not_reached("what verb");
- if ((!modes && !streq(verb, "suspend")) || !states) {
- strv_free(modes);
- strv_free(states);
+ if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) ||
+ (!states && !streq(verb, "suspend-then-hibernate")))
return log_oom();
- }
- *_modes = modes;
- *_states = states;
+ 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;
#define HIBERNATION_SWAP_THRESHOLD 0.98
-static int hibernation_partition_size(size_t *size, size_t *used) {
+int find_hibernate_location(char **device, char **type, 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,
(void) fscanf(f, "%*s %*s %*s %*s %*s\n");
for (i = 1;; i++) {
- _cleanup_free_ char *dev = NULL, *type = NULL;
+ _cleanup_free_ char *dev_field = NULL, *type_field = NULL;
size_t size_field, used_field;
int k;
"%zu " /* swap size */
"%zu " /* used */
"%*i\n", /* priority */
- &dev, &type, &size_field, &used_field);
+ &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, "partition") && endswith(dev, "\\040(deleted)")) {
- log_warning("Ignoring deleted swapfile '%s'.", dev);
- 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;
+ }
}
- *size = size_field;
- *used = used_field;
+ 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;
}
- log_debug("No swap partitions were found.");
- return -ENOSYS;
+ return log_debug_errno(SYNTHETIC_ERRNO(ENOSYS),
+ "No swap partitions were found.");
}
-static bool enough_memory_for_hibernation(void) {
+static bool enough_swap_for_hibernation(void) {
_cleanup_free_ char *active = NULL;
unsigned long long act = 0;
size_t size = 0, used = 0;
if (getenv_bool("SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK") > 0)
return true;
- r = hibernation_partition_size(&size, &used);
+ r = find_hibernate_location(NULL, NULL, &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");
+ 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;
}
-int can_sleep(const char *verb) {
+int read_fiemap(int fd, struct fiemap **ret) {
+ _cleanup_free_ struct fiemap *fiemap = NULL, *result_fiemap = NULL;
+ struct stat statinfo;
+ uint32_t result_extents = 0;
+ uint64_t fiemap_start = 0, fiemap_length;
+ const size_t n_extra = DIV_ROUND_UP(sizeof(struct fiemap), sizeof(struct fiemap_extent));
+ size_t fiemap_allocated = n_extra, result_fiemap_allocated = n_extra;
+
+ if (fstat(fd, &statinfo) < 0)
+ return log_debug_errno(errno, "Cannot determine file size: %m");
+ if (!S_ISREG(statinfo.st_mode))
+ return -ENOTTY;
+ fiemap_length = statinfo.st_size;
+
+ /* Zero this out in case we run on a file with no extents */
+ fiemap = calloc(n_extra, sizeof(struct fiemap_extent));
+ if (!fiemap)
+ return -ENOMEM;
+
+ result_fiemap = malloc_multiply(n_extra, sizeof(struct fiemap_extent));
+ if (!result_fiemap)
+ return -ENOMEM;
+
+ /* XFS filesystem has incorrect implementation of fiemap ioctl and
+ * returns extents for only one block-group at a time, so we need
+ * to handle it manually, starting the next fiemap call from the end
+ * of the last extent
+ */
+ while (fiemap_start < fiemap_length) {
+ *fiemap = (struct fiemap) {
+ .fm_start = fiemap_start,
+ .fm_length = fiemap_length,
+ .fm_flags = FIEMAP_FLAG_SYNC,
+ };
+
+ /* Find out how many extents there are */
+ if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0)
+ return log_debug_errno(errno, "Failed to read extents: %m");
+
+ /* Nothing to process */
+ if (fiemap->fm_mapped_extents == 0)
+ break;
+
+ /* Resize fiemap to allow us to read in the extents, result fiemap has to hold all
+ * the extents for the whole file. Add space for the initial struct fiemap. */
+ if (!greedy_realloc0((void**) &fiemap, &fiemap_allocated,
+ n_extra + fiemap->fm_mapped_extents, sizeof(struct fiemap_extent)))
+ return -ENOMEM;
+
+ fiemap->fm_extent_count = fiemap->fm_mapped_extents;
+ fiemap->fm_mapped_extents = 0;
+
+ if (ioctl(fd, FS_IOC_FIEMAP, fiemap) < 0)
+ return log_debug_errno(errno, "Failed to read extents: %m");
+
+ /* Resize result_fiemap to allow us to copy in the extents */
+ if (!greedy_realloc((void**) &result_fiemap, &result_fiemap_allocated,
+ n_extra + result_extents + fiemap->fm_mapped_extents, sizeof(struct fiemap_extent)))
+ return -ENOMEM;
+
+ memcpy(result_fiemap->fm_extents + result_extents,
+ fiemap->fm_extents,
+ sizeof(struct fiemap_extent) * fiemap->fm_mapped_extents);
+
+ result_extents += fiemap->fm_mapped_extents;
+
+ /* Highly unlikely that it is zero */
+ if (_likely_(fiemap->fm_mapped_extents > 0)) {
+ uint32_t i = fiemap->fm_mapped_extents - 1;
+
+ fiemap_start = fiemap->fm_extents[i].fe_logical +
+ fiemap->fm_extents[i].fe_length;
+
+ if (fiemap->fm_extents[i].fe_flags & FIEMAP_EXTENT_LAST)
+ break;
+ }
+ }
+
+ memcpy(result_fiemap, fiemap, sizeof(struct fiemap));
+ result_fiemap->fm_mapped_extents = result_extents;
+ *ret = TAKE_PTR(result_fiemap);
+ return 0;
+}
+
+static int can_sleep_internal(const char *verb, bool check_allowed);
+
+static bool can_s2h(void) {
+ const char *p;
+ int r;
+
+ r = access("/sys/class/rtc/rtc0/wakealarm", W_OK);
+ if (r < 0) {
+ log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
+ "/sys/class/rct/rct0/wakealarm is not writable %m");
+ return false;
+ }
+
+ FOREACH_STRING(p, "suspend", "hibernate") {
+ r = can_sleep_internal(p, false);
+ if (IN_SET(r, 0, -ENOSPC, -EADV)) {
+ log_debug("Unable to %s system.", p);
+ return false;
+ }
+ if (r < 0)
+ return log_debug_errno(r, "Failed to check if %s is possible: %m", p);
+ }
+
+ return true;
+}
+
+static int can_sleep_internal(const char *verb, bool check_allowed) {
+ bool allow;
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
int r;
- assert(streq(verb, "suspend") ||
- streq(verb, "hibernate") ||
- streq(verb, "hybrid-sleep"));
+ assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"));
- r = parse_sleep_config(verb, &modes, &states);
+ 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 streq(verb, "suspend") || enough_memory_for_hibernation();
+ if (streq(verb, "suspend"))
+ return true;
+
+ if (!enough_swap_for_hibernation())
+ return -ENOSPC;
+
+ return true;
+}
+
+int can_sleep(const char *verb) {
+ return can_sleep_internal(verb, true);
}
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