| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| /*** |
| Copyright © 2010-2017 Canonical |
| Copyright © 2018 Dell Inc. |
| ***/ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <linux/fiemap.h> |
| #include <poll.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/timerfd.h> |
| #include <unistd.h> |
| |
| #include "sd-messages.h" |
| |
| #include "btrfs-util.h" |
| #include "bus-error.h" |
| #include "def.h" |
| #include "exec-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "format-util.h" |
| #include "io-util.h" |
| #include "log.h" |
| #include "main-func.h" |
| #include "parse-util.h" |
| #include "pretty-print.h" |
| #include "sleep-config.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "time-util.h" |
| #include "util.h" |
| |
| static SleepOperation arg_operation = _SLEEP_OPERATION_INVALID; |
| |
| static int write_hibernate_location_info(const HibernateLocation *hibernate_location) { |
| char offset_str[DECIMAL_STR_MAX(uint64_t)]; |
| char resume_str[DECIMAL_STR_MAX(unsigned) * 2 + STRLEN(":")]; |
| int r; |
| |
| assert(hibernate_location); |
| assert(hibernate_location->swap); |
| |
| xsprintf(resume_str, "%u:%u", major(hibernate_location->devno), minor(hibernate_location->devno)); |
| r = write_string_file("/sys/power/resume", resume_str, WRITE_STRING_FILE_DISABLE_BUFFER); |
| if (r < 0) |
| return log_debug_errno(r, "Failed to write partition device to /sys/power/resume for '%s': '%s': %m", |
| hibernate_location->swap->device, resume_str); |
| |
| log_debug("Wrote resume= value for %s to /sys/power/resume: %s", hibernate_location->swap->device, resume_str); |
| |
| /* if it's a swap partition, we're done */ |
| if (streq(hibernate_location->swap->type, "partition")) |
| return r; |
| |
| if (!streq(hibernate_location->swap->type, "file")) |
| return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), |
| "Invalid hibernate type: %s", hibernate_location->swap->type); |
| |
| /* Only available in 4.17+ */ |
| if (hibernate_location->offset > 0 && access("/sys/power/resume_offset", W_OK) < 0) { |
| if (errno == ENOENT) { |
| log_debug("Kernel too old, can't configure resume_offset for %s, ignoring: %" PRIu64, |
| hibernate_location->swap->device, hibernate_location->offset); |
| return 0; |
| } |
| |
| return log_debug_errno(errno, "/sys/power/resume_offset not writable: %m"); |
| } |
| |
| xsprintf(offset_str, "%" PRIu64, hibernate_location->offset); |
| r = write_string_file("/sys/power/resume_offset", offset_str, WRITE_STRING_FILE_DISABLE_BUFFER); |
| if (r < 0) |
| return log_debug_errno(r, "Failed to write swap file offset to /sys/power/resume_offset for '%s': '%s': %m", |
| hibernate_location->swap->device, offset_str); |
| |
| log_debug("Wrote resume_offset= value for %s to /sys/power/resume_offset: %s", hibernate_location->swap->device, offset_str); |
| |
| return 0; |
| } |
| |
| static int write_mode(char **modes) { |
| int r = 0; |
| char **mode; |
| |
| STRV_FOREACH(mode, modes) { |
| int k; |
| |
| k = write_string_file("/sys/power/disk", *mode, WRITE_STRING_FILE_DISABLE_BUFFER); |
| if (k >= 0) |
| return 0; |
| |
| log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", *mode); |
| if (r >= 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static int write_state(FILE **f, char **states) { |
| char **state; |
| int r = 0; |
| |
| assert(f); |
| assert(*f); |
| |
| STRV_FOREACH(state, states) { |
| int k; |
| |
| k = write_string_stream(*f, *state, WRITE_STRING_FILE_DISABLE_BUFFER); |
| if (k >= 0) |
| return 0; |
| log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", *state); |
| if (r >= 0) |
| r = k; |
| |
| fclose(*f); |
| *f = fopen("/sys/power/state", "we"); |
| if (!*f) |
| return -errno; |
| } |
| |
| return r; |
| } |
| |
| static int lock_all_homes(void) { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
| _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; |
| int r; |
| |
| /* Let's synchronously lock all home directories managed by homed that have been marked for it. This |
| * way the key material required to access these volumes is hopefully removed from memory. */ |
| |
| r = sd_bus_open_system(&bus); |
| if (r < 0) |
| return log_warning_errno(r, "Failed to connect to system bus, ignoring: %m"); |
| |
| r = sd_bus_message_new_method_call( |
| bus, |
| &m, |
| "org.freedesktop.home1", |
| "/org/freedesktop/home1", |
| "org.freedesktop.home1.Manager", |
| "LockAllHomes"); |
| if (r < 0) |
| return bus_log_create_error(r); |
| |
| /* If homed is not running it can't have any home directories active either. */ |
| r = sd_bus_message_set_auto_start(m, false); |
| if (r < 0) |
| return log_error_errno(r, "Failed to disable auto-start of LockAllHomes() message: %m"); |
| |
| r = sd_bus_call(bus, m, DEFAULT_TIMEOUT_USEC, &error, NULL); |
| if (r < 0) { |
| if (!bus_error_is_unknown_service(&error)) |
| return log_error_errno(r, "Failed to lock home directories: %s", bus_error_message(&error, r)); |
| |
| log_debug("systemd-homed is not running, locking of home directories skipped."); |
| } else |
| log_debug("Successfully requested locking of all home directories."); |
| return 0; |
| } |
| |
| static int execute( |
| const SleepConfig *sleep_config, |
| SleepOperation operation, |
| const char *action) { |
| |
| char *arguments[] = { |
| NULL, |
| (char*) "pre", |
| /* NB: we use 'arg_operation' instead of 'operation' here, as we want to communicate the overall |
| * operation here, not the specific one, in case of s2h. */ |
| (char*) sleep_operation_to_string(arg_operation), |
| NULL |
| }; |
| static const char* const dirs[] = { |
| SYSTEM_SLEEP_PATH, |
| NULL |
| }; |
| |
| _cleanup_(hibernate_location_freep) HibernateLocation *hibernate_location = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| char **modes, **states; |
| int r; |
| |
| assert(sleep_config); |
| assert(operation >= 0); |
| assert(operation < _SLEEP_OPERATION_MAX); |
| assert(operation != SLEEP_SUSPEND_THEN_HIBERNATE); /* Handled by execute_s2h() instead */ |
| |
| states = sleep_config->states[operation]; |
| modes = sleep_config->modes[operation]; |
| |
| if (strv_isempty(states)) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "No sleep states configured for sleep operation %s, can't sleep.", |
| sleep_operation_to_string(operation)); |
| |
| /* This file is opened first, so that if we hit an error, |
| * we can abort before modifying any state. */ |
| f = fopen("/sys/power/state", "we"); |
| if (!f) |
| return log_error_errno(errno, "Failed to open /sys/power/state: %m"); |
| |
| setvbuf(f, NULL, _IONBF, 0); |
| |
| /* Configure hibernation settings if we are supposed to hibernate */ |
| if (!strv_isempty(modes)) { |
| r = find_hibernate_location(&hibernate_location); |
| if (r < 0) |
| return log_error_errno(r, "Failed to find location to hibernate to: %m"); |
| if (r == 0) { /* 0 means: no hibernation location was configured in the kernel so far, let's |
| * do it ourselves then. > 0 means: kernel already had a configured hibernation |
| * location which we shouldn't touch. */ |
| r = write_hibernate_location_info(hibernate_location); |
| if (r < 0) |
| return log_error_errno(r, "Failed to prepare for hibernation: %m"); |
| } |
| |
| r = write_mode(modes); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");; |
| } |
| |
| /* Pass an action string to the call-outs. This is mostly our operation string, except if the |
| * hibernate step of s-t-h fails, in which case we communicate that with a separate action. */ |
| if (!action) |
| action = sleep_operation_to_string(operation); |
| |
| r = setenv("SYSTEMD_SLEEP_ACTION", action, 1); |
| if (r != 0) |
| log_warning_errno(errno, "Error setting SYSTEMD_SLEEP_ACTION=%s, ignoring: %m", action); |
| |
| (void) execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS); |
| (void) lock_all_homes(); |
| |
| log_struct(LOG_INFO, |
| "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR, |
| LOG_MESSAGE("Entering sleep state '%s'...", sleep_operation_to_string(operation)), |
| "SLEEP=%s", sleep_operation_to_string(arg_operation)); |
| |
| r = write_state(&f, states); |
| if (r < 0) |
| log_struct_errno(LOG_ERR, r, |
| "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR, |
| LOG_MESSAGE("Failed to put system to sleep. System resumed again: %m"), |
| "SLEEP=%s", sleep_operation_to_string(arg_operation)); |
| else |
| log_struct(LOG_INFO, |
| "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR, |
| LOG_MESSAGE("System returned from sleep state."), |
| "SLEEP=%s", sleep_operation_to_string(arg_operation)); |
| |
| arguments[1] = (char*) "post"; |
| (void) execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS); |
| |
| return r; |
| } |
| |
| static int execute_s2h(const SleepConfig *sleep_config) { |
| _cleanup_close_ int tfd = -1; |
| char buf[FORMAT_TIMESPAN_MAX]; |
| struct itimerspec ts = {}; |
| int r; |
| |
| assert(sleep_config); |
| |
| tfd = timerfd_create(CLOCK_BOOTTIME_ALARM, TFD_NONBLOCK|TFD_CLOEXEC); |
| if (tfd < 0) |
| return log_error_errno(errno, "Error creating timerfd: %m"); |
| |
| log_debug("Set timerfd wake alarm for %s", |
| format_timespan(buf, sizeof(buf), sleep_config->hibernate_delay_sec, USEC_PER_SEC)); |
| |
| timespec_store(&ts.it_value, sleep_config->hibernate_delay_sec); |
| |
| r = timerfd_settime(tfd, 0, &ts, NULL); |
| if (r < 0) |
| return log_error_errno(errno, "Error setting hibernate timer: %m"); |
| |
| r = execute(sleep_config, SLEEP_SUSPEND, NULL); |
| if (r < 0) |
| return r; |
| |
| r = fd_wait_for_event(tfd, POLLIN, 0); |
| if (r < 0) |
| return log_error_errno(r, "Error polling timerfd: %m"); |
| if (!FLAGS_SET(r, POLLIN)) /* We woke up before the alarm time, we are done. */ |
| return 0; |
| |
| tfd = safe_close(tfd); |
| |
| /* If woken up after alarm time, hibernate */ |
| log_debug("Attempting to hibernate after waking from %s timer", |
| format_timespan(buf, sizeof(buf), sleep_config->hibernate_delay_sec, USEC_PER_SEC)); |
| |
| r = execute(sleep_config, SLEEP_HIBERNATE, NULL); |
| if (r < 0) { |
| log_notice("Couldn't hibernate, will try to suspend again."); |
| |
| r = execute(sleep_config, SLEEP_SUSPEND, "suspend-after-failed-hibernate"); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int help(void) { |
| _cleanup_free_ char *link = NULL; |
| int r; |
| |
| r = terminal_urlify_man("systemd-suspend.service", "8", &link); |
| if (r < 0) |
| return log_oom(); |
| |
| printf("%s COMMAND\n\n" |
| "Suspend the system, hibernate the system, or both.\n\n" |
| " -h --help Show this help and exit\n" |
| " --version Print version string and exit\n" |
| "\nCommands:\n" |
| " suspend Suspend the system\n" |
| " hibernate Hibernate the system\n" |
| " hybrid-sleep Both hibernate and suspend the system\n" |
| " suspend-then-hibernate Initially suspend and then hibernate\n" |
| " the system after a fixed period of time\n" |
| "\nSee the %s for details.\n", |
| program_invocation_short_name, |
| link); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| enum { |
| ARG_VERSION = 0x100, |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| {} |
| }; |
| |
| int c; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
| switch(c) { |
| case 'h': |
| return help(); |
| |
| case ARG_VERSION: |
| return version(); |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached("Unhandled option"); |
| } |
| |
| if (argc - optind != 1) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "Usage: %s COMMAND", |
| program_invocation_short_name); |
| |
| arg_operation = sleep_operation_from_string(argv[optind]); |
| if (arg_operation < 0) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown command '%s'.", argv[optind]); |
| |
| return 1 /* work to do */; |
| } |
| |
| static int run(int argc, char *argv[]) { |
| _cleanup_(free_sleep_configp) SleepConfig *sleep_config = NULL; |
| int r; |
| |
| log_setup(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| return r; |
| |
| r = parse_sleep_config(&sleep_config); |
| if (r < 0) |
| return r; |
| |
| if (!sleep_config->allow[arg_operation]) |
| return log_error_errno(SYNTHETIC_ERRNO(EACCES), |
| "Sleep operation \"%s\" is disabled by configuration, refusing.", |
| sleep_operation_to_string(arg_operation)); |
| |
| switch (arg_operation) { |
| |
| case SLEEP_SUSPEND_THEN_HIBERNATE: |
| r = execute_s2h(sleep_config); |
| break; |
| |
| case SLEEP_HYBRID_SLEEP: |
| r = execute(sleep_config, SLEEP_HYBRID_SLEEP, NULL); |
| if (r < 0) { |
| /* If we can't hybrid sleep, then let's try to suspend at least. After all, the user |
| * asked us to do both: suspend + hibernate, and it's almost certainly the |
| * hibernation that failed, hence still do the other thing, the suspend. */ |
| |
| log_notice("Couldn't hybrid sleep, will try to suspend instead."); |
| |
| r = execute(sleep_config, SLEEP_SUSPEND, "suspend-after-failed-hybrid-sleep"); |
| } |
| |
| break; |
| |
| default: |
| r = execute(sleep_config, arg_operation, NULL); |
| break; |
| } |
| |
| return r; |
| } |
| |
| DEFINE_MAIN_FUNCTION(run); |
