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>
#define HIBERNATION_SWAP_THRESHOLD 0.98
-int find_hibernate_location(char **device, char **type, size_t *size, size_t *used) {
+static int hibernation_partition_size(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_field = NULL, *type_field = NULL;
+ _cleanup_free_ char *dev = NULL, *type = NULL;
size_t size_field, used_field;
int k;
"%zu " /* swap size */
"%zu " /* used */
"%*i\n", /* priority */
- &dev_field, &type_field, &size_field, &used_field);
+ &dev, &type, &size_field, &used_field);
if (k != 4) {
if (k == EOF)
break;
continue;
}
- if (streq(type_field, "partition") && endswith(dev_field, "\\040(deleted)")) {
- log_warning("Ignoring deleted swapfile '%s'.", dev_field);
+ if (streq(type, "partition") && endswith(dev, "\\040(deleted)")) {
+ log_warning("Ignoring deleted swapfile '%s'.", dev);
continue;
}
- if (device)
- *device = TAKE_PTR(dev_field);
- if (type)
- *type = TAKE_PTR(type_field);
- if (size)
- *size = size_field;
- if (used)
- *used = used_field;
+
+ *size = size_field;
+ *used = used_field;
return 0;
}
return true;
#endif // 0
- r = find_hibernate_location(NULL, NULL, &size, &used);
+ r = hibernation_partition_size(&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;
-}
#if 0 /// elogind has to do, or better, *can* do it differently
static bool can_s2h(void) {
~ianmdlvl / elogind.git / blobdiff