/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
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>
**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[] = {
assert_not_reached("what verb");
if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) ||
- (!states && !streq(verb, "suspend-then-hibernate"))) {
- strv_free(modes);
- strv_free(states);
+ (!states && !streq(verb, "suspend-then-hibernate")))
return log_oom();
- }
if (_modes)
- *_modes = modes;
+ *_modes = TAKE_PTR(modes);
if (_states)
- *_states = states;
+ *_states = TAKE_PTR(states);
if (_delay)
*_delay = delay;
#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;
}
return -ENOSYS;
}
-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;
return true;
#endif // 0
- 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;
+ 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;
+}
+
#if 0 /// elogind has to do, or better, *can* do it differently
static bool can_s2h(void) {
+ const char *p;
int r;
r = access("/sys/class/rtc/rtc0/wakealarm", W_OK);
return false;
}
- r = can_sleep("suspend");
- if (r < 0) {
- log_debug_errno(r, "Unable to suspend system.");
- return false;
- }
-
- r = can_sleep("hibernate");
- if (r < 0) {
- log_debug_errno(r, "Unable to hibernate system.");
- return false;
+ FOREACH_STRING(p, "suspend", "hibernate") {
+ r = can_sleep(p);
+ if (IN_SET(r, 0, -ENOSPC)) {
+ 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;
return false;
return streq(verb, "suspend") || enough_memory_for_hibernation();
+ if (streq(verb, "suspend"))
+ return true;
+
+ if (!enough_memory_for_hibernation())
+ if (!enough_swap_for_hibernation())
+ return -ENOSPC;
+
+ return true;
}
#endif // 0
~ianmdlvl / elogind.git / blobdiff