***/
#include <errno.h>
+#include <fcntl.h>
#include <linux/fs.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
-#include <sys/utsname.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
#include <syslog.h>
#include <unistd.h>
-#include "sd-id128.h"
-
#include "alloc-util.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 "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;
}
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");
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 = 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;
}
-static int kernel_exists(void) {
- struct utsname u;
- sd_id128_t m;
- int i, r;
-
- /* Do some superficial checks whether the kernel we are currently running is still around. If it isn't we
- * shouldn't offer hibernation as we couldn't possible resume from hibernation again. Of course, this check is
- * very superficial, as the kernel's mere existance is hardly enough to know whether the hibernate/resume cycle
- * will succeed. However, the common case of kernel updates can be caught this way, and it's definitely worth
- * covering that. */
-
- for (i = 0;; i++) {
- _cleanup_free_ char *path = NULL;
-
- switch (i) {
-
- case 0:
- /* First, let's look in /lib/modules/`uname -r`/vmlinuz. This is where current Fedora places
- * its RPM-managed kernels. It's a good place, as it means compiled vendor code is monopolized
- * in /usr, and then the kernel image is stored along with its modules in the same
- * hierarchy. It's also what our 'kernel-install' script is written for. */
- if (uname(&u) < 0)
- return log_debug_errno(errno, "Failed to acquire kernel release: %m");
-
- path = strjoin("/lib/modules/", u.release, "/vmlinuz");
- break;
-
- case 1:
- /* Secondly, let's look in /boot/vmlinuz-`uname -r`. This is where older Fedora and other
- * distributions tend to place the kernel. */
- path = strjoin("/boot/vmlinuz-", u.release);
- break;
-
- case 2:
- /* For the other cases, we look in the EFI/boot partition, at the place where our
- * "kernel-install" script copies the kernel on install by default. */
- r = sd_id128_get_machine(&m);
- if (r < 0)
- return log_debug_errno(r, "Failed to read machine ID: %m");
-
- (void) asprintf(&path, "/efi/" SD_ID128_FORMAT_STR "/%s/linux", SD_ID128_FORMAT_VAL(m), u.release);
- break;
- case 3:
- (void) asprintf(&path, "/boot/" SD_ID128_FORMAT_STR "/%s/linux", SD_ID128_FORMAT_VAL(m), u.release);
- break;
- case 4:
- (void) asprintf(&path, "/boot/efi/" SD_ID128_FORMAT_STR "/%s/linux", SD_ID128_FORMAT_VAL(m), u.release);
- break;
-
- default:
- return false;
- }
-
- if (!path)
- return -ENOMEM;
-
- log_debug("Testing whether %s exists.", path);
-
- if (access(path, F_OK) >= 0)
- return true;
-
- if (errno != ENOENT)
- log_debug_errno(errno, "Failed to determine whether '%s' exists, ignoring: %m", path);
- }
-}
-
int read_fiemap(int fd, struct fiemap **ret) {
_cleanup_free_ struct fiemap *fiemap = NULL, *result_fiemap = NULL;
struct stat statinfo;
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, -ENOMEDIUM)) {
+ 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;
if (streq(verb, "suspend"))
return true;
- if (kernel_exists() <= 0) {
- log_debug_errno(errno, "Couldn't find kernel, not offering hibernation.");
- return -ENOMEDIUM;
- }
-
if (!enough_swap_for_hibernation())
return -ENOSPC;
return true;
}
+
+int can_sleep(const char *verb) {
+ return can_sleep_internal(verb, true);
+}
projects / thirdparty / systemd.git / blobdiff