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-rw-r--r--src/shared/sleep-config.c80
1 files changed, 63 insertions, 17 deletions
diff --git a/src/shared/sleep-config.c b/src/shared/sleep-config.c
index 148c4dc617..d068bfce3c 100644
--- a/src/shared/sleep-config.c
+++ b/src/shared/sleep-config.c
@@ -165,24 +165,70 @@ int can_sleep_disk(char **types) {
#define HIBERNATION_SWAP_THRESHOLD 0.98
-static bool enough_memory_for_hibernation(void) {
- _cleanup_free_ char *active = NULL, *swapfree = NULL;
- unsigned long long act, swap;
- int r;
+static int hibernation_partition_size(size_t *size, size_t *used) {
+ _cleanup_fclose_ FILE *f;
+ int i;
+
+ assert(size);
+ assert(used);
+
+ f = fopen("/proc/swaps", "r");
+ if (!f) {
+ log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
+ "Failed to retrieve open /proc/swaps: %m");
+ assert(errno > 0);
+ return -errno;
+ }
- r = get_status_field("/proc/meminfo", "\nSwapFree:", &swapfree);
- if (r < 0) {
- log_full(r == -ENOENT ? LOG_DEBUG : LOG_WARNING,
- "Failed to retrieve SwapFree from /proc/meminfo: %s", strerror(-r));
- return false;
+ (void) fscanf(f, "%*s %*s %*s %*s %*s\n");
+
+ for (i = 1;; i++) {
+ _cleanup_free_ char *dev = NULL, *d = NULL, *type = NULL;
+ size_t size_field, used_field;
+ int k;
+
+ k = fscanf(f,
+ "%ms " /* device/file */
+ "%ms " /* type of swap */
+ "%zd " /* swap size */
+ "%zd " /* used */
+ "%*i\n", /* priority */
+ &dev, &type, &size_field, &used_field);
+ if (k != 4) {
+ if (k == EOF)
+ break;
+
+ log_warning("Failed to parse /proc/swaps:%u", i);
+ continue;
+ }
+
+ d = cunescape(dev);
+ if (!d)
+ return -ENOMEM;
+
+ if (!streq(type, "partition")) {
+ log_debug("Partition %s has type %s, ignoring.", d, type);
+ continue;
+ }
+
+ *size = size_field;
+ *used = used_field;
+ return 0;
}
- r = safe_atollu(swapfree, &swap);
- if (r < 0) {
- log_error("Failed to parse SwapFree from /proc/meminfo: %s: %s",
- swapfree, strerror(-r));
+ log_debug("No swap partitions were found.");
+ return -ENOSYS;
+}
+
+static bool enough_memory_for_hibernation(void) {
+ _cleanup_free_ char *active = NULL;
+ unsigned long long act;
+ size_t size, used;
+ int r;
+
+ r = hibernation_partition_size(&size, &used);
+ if (r < 0)
return false;
- }
r = get_status_field("/proc/meminfo", "\nActive(anon):", &active);
if (r < 0) {
@@ -197,9 +243,9 @@ static bool enough_memory_for_hibernation(void) {
return false;
}
- r = act <= swap * HIBERNATION_SWAP_THRESHOLD;
- log_debug("Hibernation is %spossible, Active(anon)=%llu kB, SwapFree=%llu kB, threshold=%.2g%%",
- r ? "" : "im", act, swap, 100*HIBERNATION_SWAP_THRESHOLD);
+ 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);
return r;
}