if (sleep_verb) {
r = can_sleep(sleep_verb);
if (r == -ENOSPC)
- return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
- "Not enough swap space for hibernation");
+ return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Not enough swap space for hibernation");
+ if (r == -ENOMEDIUM)
+ return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Kernel image has been removed, can't hibernate");
if (r == 0)
- return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED,
- "Sleep verb \"%s\" not supported", sleep_verb);
+ return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb \"%s\" not supported", sleep_verb);
if (r < 0)
return r;
}
if (sleep_verb) {
r = can_sleep(sleep_verb);
- if (IN_SET(r, 0, -ENOSPC))
+ if (IN_SET(r, 0, -ENOSPC, -ENOMEDIUM))
return sd_bus_reply_method_return(message, "s", "na");
if (r < 0)
return r;
#include <stddef.h>
#include <stdio.h>
#include <string.h>
+#include <sys/utsname.h>
#include <syslog.h>
#include <unistd.h>
+#include "sd-id128.h"
+
#include "alloc-util.h"
#include "conf-parser.h"
#include "def.h"
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;
FOREACH_STRING(p, "suspend", "hibernate") {
r = can_sleep(p);
- if (IN_SET(r, 0, -ENOSPC)) {
+ if (IN_SET(r, 0, -ENOSPC, -ENOMEDIUM)) {
log_debug("Unable to %s system.", p);
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;