Copyright 2013 Zbigniew Jędrzejewski-Szmek
Copyright 2018 Dell Inc.
-
- 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/>.
***/
#include <errno.h>
+#include <linux/fs.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.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, usec_t *_delay) {
_cleanup_strv_free_ char
**hibernate_mode = NULL, **hibernate_state = NULL,
**hybrid_mode = NULL, **hybrid_state = NULL;
char **modes, **states;
- usec_t delay;
+ usec_t delay = 180 * USEC_PER_MINUTE;
const ConfigTableItem items[] = {
{ "Sleep", "SuspendMode", config_parse_strv, 0, &suspend_mode },
if (streq(verb, "suspend")) {
/* 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);
} else if (streq(verb, "hibernate")) {
if (hibernate_mode)
- USE(modes, hibernate_mode);
+ modes = TAKE_PTR(hibernate_mode);
else
modes = strv_new("platform", "shutdown", NULL);
if (hibernate_state)
- USE(states, hibernate_state);
+ states = TAKE_PTR(hibernate_state);
else
states = strv_new("disk", NULL);
} else if (streq(verb, "hybrid-sleep")) {
if (hybrid_mode)
- USE(modes, hybrid_mode);
+ modes = TAKE_PTR(hybrid_mode);
else
modes = strv_new("suspend", "platform", "shutdown", NULL);
if (hybrid_state)
- USE(states, hybrid_state);
+ states = TAKE_PTR(hybrid_state);
else
states = strv_new("disk", NULL);
- } else if (streq(verb, "suspend-to-hibernate")) {
- if (delay == 0)
- delay = 180 * USEC_PER_MINUTE;
- } else
+
+ } else if (streq(verb, "suspend-then-hibernate"))
+ modes = states = NULL;
+ else
assert_not_reached("what verb");
- if ((!modes && (streq(verb, "hibernate") || streq(verb, "hybrid-sleep"))) ||
- (!states && !streq(verb, "suspend-to-hibernate"))) {
+ if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) ||
+ (!states && !streq(verb, "suspend-then-hibernate"))) {
strv_free(modes);
strv_free(states);
return log_oom();
#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 != 4) {
if (k == EOF)
break;
continue;
}
- if (streq(type, "partition") && endswith(dev, "\\040(deleted)")) {
- log_warning("Ignoring deleted swapfile '%s'.", dev);
+ if (streq(type_field, "partition") && endswith(dev_field, "\\040(deleted)")) {
+ log_warning("Ignoring deleted swapfile '%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;
}
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;
return r;
}
+int read_fiemap(int fd, struct fiemap **ret) {
+ _cleanup_free_ struct fiemap *fiemap = NULL, *result_fiemap = NULL;
+ int extents_size;
+ struct stat statinfo;
+ uint32_t result_extents = 0;
+ uint64_t fiemap_start = 0, fiemap_length;
+ size_t fiemap_size = 1, result_fiemap_size = 1;
+
+ 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 = new0(struct fiemap, 1);
+ if (!fiemap)
+ return -ENOMEM;
+
+ result_fiemap = new(struct fiemap, 1);
+ 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;
+
+ /* Result fiemap has to hold all the extents for the whole file */
+ extents_size = DIV_ROUND_UP(sizeof(struct fiemap_extent) * fiemap->fm_mapped_extents,
+ sizeof(struct fiemap));
+
+ /* Resize fiemap to allow us to read in the extents */
+ if (!GREEDY_REALLOC0(fiemap, fiemap_size, extents_size))
+ 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");
+
+ extents_size = DIV_ROUND_UP(sizeof(struct fiemap_extent) * (result_extents + fiemap->fm_mapped_extents),
+ sizeof(struct fiemap));
+
+ /* Resize result_fiemap to allow us to read in the extents */
+ if (!GREEDY_REALLOC(result_fiemap, result_fiemap_size,
+ extents_size))
+ 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 (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 bool can_s2h(void) {
int r;
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
int r;
- assert(streq(verb, "suspend") ||
- streq(verb, "hibernate") ||
- streq(verb, "hybrid-sleep") ||
- streq(verb, "suspend-to-hibernate"));
+ assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate"));
- if (streq(verb, "suspend-to-hibernate"))
+ if (streq(verb, "suspend-then-hibernate"))
return can_s2h();
r = parse_sleep_config(verb, &modes, &states, NULL);
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