/* SPDX-License-Identifier: LGPL-2.1+ */ /*** This file is part of systemd. Copyright 2013 Zbigniew Jędrzejewski-Szmek Copyright 2018 Dell Inc. ***/ //#include //#include //#include //#include //#include //#include //#include //#include #include "alloc-util.h" //#include "conf-parser.h" //#include "def.h" //#include "env-util.h" #include "fd-util.h" #include "fileio.h" //#include "log.h" //#include "macro.h" #include "parse-util.h" #include "sleep-config.h" #include "string-util.h" #include "strv.h" #if 0 /// UNNEEDED by elogind int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t *_delay) { _cleanup_strv_free_ char **suspend_mode = NULL, **suspend_state = NULL, **hibernate_mode = NULL, **hibernate_state = NULL, **hybrid_mode = NULL, **hybrid_state = NULL; _cleanup_strv_free_ char **modes, **states; /* always initialized below */ usec_t delay = 180 * USEC_PER_MINUTE; const ConfigTableItem items[] = { { "Sleep", "SuspendMode", config_parse_strv, 0, &suspend_mode }, { "Sleep", "SuspendState", config_parse_strv, 0, &suspend_state }, { "Sleep", "HibernateMode", config_parse_strv, 0, &hibernate_mode }, { "Sleep", "HibernateState", config_parse_strv, 0, &hibernate_state }, { "Sleep", "HybridSleepMode", config_parse_strv, 0, &hybrid_mode }, { "Sleep", "HybridSleepState", config_parse_strv, 0, &hybrid_state }, { "Sleep", "HibernateDelaySec", config_parse_sec, 0, &delay}, {} }; (void) config_parse_many_nulstr(PKGSYSCONFDIR "/sleep.conf", CONF_PATHS_NULSTR("elogind/sleep.conf.d"), "Sleep\0", config_item_table_lookup, items, CONFIG_PARSE_WARN, NULL); if (streq(verb, "suspend")) { /* empty by default */ modes = TAKE_PTR(suspend_mode); if (suspend_state) states = TAKE_PTR(suspend_state); else states = strv_new("mem", "standby", "freeze", NULL); } else if (streq(verb, "hibernate")) { if (hibernate_mode) modes = TAKE_PTR(hibernate_mode); else modes = strv_new("platform", "shutdown", NULL); if (hibernate_state) states = TAKE_PTR(hibernate_state); else states = strv_new("disk", NULL); } else if (streq(verb, "hybrid-sleep")) { if (hybrid_mode) modes = TAKE_PTR(hybrid_mode); else modes = strv_new("suspend", "platform", "shutdown", NULL); if (hybrid_state) states = TAKE_PTR(hybrid_state); else states = strv_new("disk", NULL); } else if (streq(verb, "suspend-then-hibernate")) modes = states = NULL; else assert_not_reached("what verb"); if ((!modes && STR_IN_SET(verb, "hibernate", "hybrid-sleep")) || (!states && !streq(verb, "suspend-then-hibernate"))) return log_oom(); if (_modes) *_modes = TAKE_PTR(modes); if (_states) *_states = TAKE_PTR(states); if (_delay) *_delay = delay; return 0; } #endif // 0 #if 1 /// Only available in this file for elogind static #endif // 1 int can_sleep_state(char **types) { char **type; int r; _cleanup_free_ char *p = NULL; if (strv_isempty(types)) return true; /* If /sys is read-only we cannot sleep */ if (access("/sys/power/state", W_OK) < 0) return false; r = read_one_line_file("/sys/power/state", &p); if (r < 0) return false; STRV_FOREACH(type, types) { const char *word, *state; size_t l, k; k = strlen(*type); FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) if (l == k && memcmp(word, *type, l) == 0) return true; } return false; } #if 1 /// Only available in this file for elogind static #endif // 1 int can_sleep_disk(char **types) { char **type; int r; _cleanup_free_ char *p = NULL; if (strv_isempty(types)) return true; /* If /sys is read-only we cannot sleep */ if (access("/sys/power/disk", W_OK) < 0) return false; r = read_one_line_file("/sys/power/disk", &p); if (r < 0) return false; STRV_FOREACH(type, types) { const char *word, *state; size_t l, k; k = strlen(*type); FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) { if (l == k && memcmp(word, *type, l) == 0) return true; if (l == k + 2 && word[0] == '[' && memcmp(word + 1, *type, l - 2) == 0 && word[l-1] == ']') return true; } } return false; } #define HIBERNATION_SWAP_THRESHOLD 0.98 int find_hibernate_location(char **device, char **type, size_t *size, size_t *used) { _cleanup_fclose_ FILE *f; unsigned i; f = fopen("/proc/swaps", "re"); if (!f) { log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, "Failed to retrieve open /proc/swaps: %m"); assert(errno > 0); return -errno; } (void) fscanf(f, "%*s %*s %*s %*s %*s\n"); for (i = 1;; i++) { _cleanup_free_ char *dev_field = NULL, *type_field = NULL; size_t size_field, used_field; int k; k = fscanf(f, "%ms " /* device/file */ "%ms " /* type of swap */ "%zu " /* swap size */ "%zu " /* used */ "%*i\n", /* priority */ &dev_field, &type_field, &size_field, &used_field); if (k != 4) { if (k == EOF) break; log_warning("Failed to parse /proc/swaps:%u", i); continue; } if (streq(type_field, "partition") && endswith(dev_field, "\\040(deleted)")) { log_warning("Ignoring deleted swapfile '%s'.", dev_field); 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; return 0; } log_debug("No swap partitions were found."); return -ENOSYS; } static bool enough_swap_for_hibernation(void) { _cleanup_free_ char *active = NULL; unsigned long long act = 0; size_t size = 0, used = 0; int r; #if 0 /// elogind does not allow any bypass, we are never init! if (getenv_bool("SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK") > 0) return true; #endif // 0 r = find_hibernate_location(NULL, NULL, &size, &used); if (r < 0) return false; r = get_proc_field("/proc/meminfo", "Active(anon)", WHITESPACE, &active); if (r < 0) { log_error_errno(r, "Failed to retrieve Active(anon) from /proc/meminfo: %m"); return false; } r = safe_atollu(active, &act); if (r < 0) { log_error_errno(r, "Failed to parse Active(anon) from /proc/meminfo: %s: %m", active); return false; } 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; } 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); if (r < 0) { log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, "/sys/class/rct/rct0/wakealarm is not writable %m"); 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; } #else int can_sleep(Manager *m, const char *verb) { assert(streq(verb, "suspend") || streq(verb, "hibernate") || streq(verb, "hybrid-sleep")); int can_sleep(const char *verb) { _cleanup_strv_free_ char **modes = NULL, **states = NULL; int r; if ( streq(verb, "suspend") && ( !can_sleep_state(m->suspend_state) || !can_sleep_disk(m->suspend_mode) ) ) return false; assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-to-hibernate")); assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")); if ( streq(verb, "hibernate") && ( !can_sleep_state(m->hibernate_state) || !can_sleep_disk(m->hibernate_mode) ) ) return false; if (streq(verb, "suspend-to-hibernate")) if (streq(verb, "suspend-then-hibernate")) return can_s2h(); if ( streq(verb, "hybrid-sleep") && ( !can_sleep_state(m->hybrid_sleep_state) || !can_sleep_disk(m->hybrid_sleep_mode) ) ) r = parse_sleep_config(verb, &modes, &states, NULL); if (r < 0) return false; if (!can_sleep_state(states) || !can_sleep_disk(modes)) 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