diff options
Diffstat (limited to 'src/shared/sleep-config.c')
| -rw-r--r-- | src/shared/sleep-config.c | 225 |
1 files changed, 189 insertions, 36 deletions
diff --git a/src/shared/sleep-config.c b/src/shared/sleep-config.c index 77b380ca3..804581666 100644 --- a/src/shared/sleep-config.c +++ b/src/shared/sleep-config.c @@ -13,6 +13,7 @@ //#include <unistd.h> #include "alloc-util.h" +//#include "bootspec.h" //#include "conf-parser.h" //#include "def.h" //#include "env-util.h" @@ -21,13 +22,17 @@ //#include "log.h" //#include "macro.h" #include "parse-util.h" +#include "path-util.h" +#include "proc-cmdline.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) { - +int parse_sleep_config(const char *verb, bool *ret_allow, char ***ret_modes, char ***ret_states, usec_t *ret_delay) { + int allow_suspend = -1, allow_hibernate = -1, + allow_s2h = -1, allow_hybrid_sleep = -1; + bool allow; _cleanup_strv_free_ char **suspend_mode = NULL, **suspend_state = NULL, **hibernate_mode = NULL, **hibernate_state = NULL, @@ -36,13 +41,19 @@ int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t 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}, + { "Sleep", "AllowSuspend", config_parse_tristate, 0, &allow_suspend }, + { "Sleep", "AllowHibernation", config_parse_tristate, 0, &allow_hibernate }, + { "Sleep", "AllowSuspendThenHibernate", config_parse_tristate, 0, &allow_s2h }, + { "Sleep", "AllowHybridSleep", config_parse_tristate, 0, &allow_hybrid_sleep }, + + { "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}, {} }; @@ -52,6 +63,8 @@ int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t CONFIG_PARSE_WARN, NULL); if (streq(verb, "suspend")) { + allow = allow_suspend != 0; + /* empty by default */ modes = TAKE_PTR(suspend_mode); @@ -61,6 +74,8 @@ int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t states = strv_new("mem", "standby", "freeze", NULL); } else if (streq(verb, "hibernate")) { + allow = allow_hibernate != 0; + if (hibernate_mode) modes = TAKE_PTR(hibernate_mode); else @@ -72,6 +87,9 @@ int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t states = strv_new("disk", NULL); } else if (streq(verb, "hybrid-sleep")) { + allow = allow_hybrid_sleep > 0 || + (allow_suspend != 0 && allow_hibernate != 0); + if (hybrid_mode) modes = TAKE_PTR(hybrid_mode); else @@ -82,21 +100,26 @@ int parse_sleep_config(const char *verb, char ***_modes, char ***_states, usec_t else states = strv_new("disk", NULL); - } else if (streq(verb, "suspend-then-hibernate")) + } else if (streq(verb, "suspend-then-hibernate")) { + allow = allow_s2h > 0 || + (allow_suspend != 0 && allow_hibernate != 0); + modes = states = NULL; - else + } 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; + if (ret_allow) + *ret_allow = allow; + if (ret_modes) + *ret_modes = TAKE_PTR(modes); + if (ret_states) + *ret_states = TAKE_PTR(states); + if (ret_delay) + *ret_delay = delay; return 0; } @@ -201,18 +224,30 @@ int find_hibernate_location(char **device, char **type, size_t *size, size_t *us "%zu " /* used */ "%*i\n", /* priority */ &dev_field, &type_field, &size_field, &used_field); + if (k == EOF) + break; 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 (streq(type_field, "file")) { + + if (endswith(dev_field, "\\040(deleted)")) { + log_warning("Ignoring deleted swap file '%s'.", dev_field); + continue; + } + + } else if (streq(type_field, "partition")) { + const char *fn; + + fn = path_startswith(dev_field, "/dev/"); + if (fn && startswith(fn, "zram")) { + log_debug("Ignoring compressed RAM swap device '%s'.", dev_field); + continue; + } } + if (device) *device = TAKE_PTR(dev_field); if (type) @@ -257,12 +292,96 @@ static bool enough_swap_for_hibernation(void) { } 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); + log_debug("%s swap for hibernation, Active(anon)=%llu kB, size=%zu kB, used=%zu kB, threshold=%.2g%%", + r ? "Enough" : "Not enough", act, size, used, 100*HIBERNATION_SWAP_THRESHOLD); return r; } +#if 0 /// elogind is not init and can not check boot devices and partitions. +static int check_resume_keys(const char *key, const char *value, void *data) { + assert_se(key); + assert_se(data); + + int *resume = data; + + if (*resume == 0) + /* Exit if we already know we can't resume. */ + return 0; + + if (streq(key, "noresume")) { + log_debug("Found \"noresume\" on the kernel command line, hibernation is disabled."); + *resume = 0; + + } else if (streq(key, "resume")) { + log_debug("Found resume= option on the kernel command line, hibernation is possible."); + *resume = 1; + } + + return 0; +} + +static int resume_configured_in_options(const char *options) { + int resume = -1, r; + + /* We don't use PROC_CMDLINE_STRIP_RD_PREFIX here, so rd.resume is *not* supported. */ + r = proc_cmdline_parse_given(options, check_resume_keys, &resume, 0); + if (r < 0) + return r; + + if (resume < 0) + log_debug("Couldn't find resume= option, hibernation is disabled."); + return resume > 0; +} + +static int resume_configured(void) { + _cleanup_(boot_config_free) BootConfig config = {}; + const BootEntry *e; + int r; + + /* Check whether a valid resume= option is present. If possible, we query the boot options + * for the default kernel. If the system is not using sd-boot, fall back to checking the + * current kernel command line. This is not perfect, but should suffice for most cases. */ + + r = find_default_boot_entry(NULL, NULL, &config, &e); + if (r == -ENOKEY) + log_debug_errno(r, "Cannot find the ESP partition mount point, falling back to other checks."); + else if (r < 0) + return log_debug_errno(r, "Cannot read boot configuration from ESP, assuming hibernation is not possible."); + else { + _cleanup_free_ char *options = NULL; + + options = strv_join(e->options, " "); + if (!options) + return log_oom(); + + r = resume_configured_in_options(options); + if (r < 0) + return log_error_errno(r, "Failed to parse kernel options in \"%s\": %m", + strnull(e->path)); + return r; + } + + /* If we can't figure out the default boot entry, let's fall back to current kernel cmdline */ + _cleanup_free_ char *line = NULL; + r = proc_cmdline(&line); + if (IN_SET(r, -EPERM, -EACCES, -ENOENT)) + log_debug_errno(r, "Cannot access /proc/cmdline: %m"); + else if (r < 0) + return log_error_errno(r, "Failed to query /proc/cmdline: %m"); + else { + r = resume_configured_in_options(line); + if (r < 0) + return log_error_errno(r, "Failed to parse kernel proc cmdline: %m"); + + return r; + } + + log_debug("Couldn't detect any resume mechanism, hibernation is disabled."); + return false; +} +#endif // 0 + int read_fiemap(int fd, struct fiemap **ret) { _cleanup_free_ struct fiemap *fiemap = NULL, *result_fiemap = NULL; struct stat statinfo; @@ -348,6 +467,12 @@ int read_fiemap(int fd, struct fiemap **ret) { } #if 0 /// elogind has to ask the manager for some stuff +static int can_sleep_internal(const char *verb, bool check_allowed); +#else +static int can_sleep_internal(Manager *m, const char *verb, bool check_allowed); +#endif // 0 + +#if 0 /// elogind has to ask the manager for some stuff static bool can_s2h(void) { #else static bool can_s2h(Manager *m) { @@ -364,11 +489,11 @@ static bool can_s2h(Manager *m) { FOREACH_STRING(p, "suspend", "hibernate") { #if 0 /// elogind must transport a pointer to its managers instance - r = can_sleep(p); + r = can_sleep_internal(p, false); #else r = can_sleep(m, p); #endif // 0 - if (IN_SET(r, 0, -ENOSPC)) { + if (IN_SET(r, 0, -ENOSPC, -EADV)) { log_debug("Unable to %s system.", p); return false; } @@ -381,11 +506,15 @@ static bool can_s2h(Manager *m) { #if 0 /// elogind has to ask the manager for some stuff -int can_sleep(const char *verb) { +static int can_sleep_internal(const char *verb, bool check_allowed) { + bool allow; _cleanup_strv_free_ char **modes = NULL, **states = NULL; int r; + + + assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")); #else -int can_sleep(Manager *m, const char *verb) { +static int can_sleep_internal(Manager *m, const char *verb, bool check_allowed) { assert(m); char **modes = streq(verb, "suspend") ? m->suspend_mode : @@ -396,7 +525,20 @@ int can_sleep(Manager *m, const char *verb) { m->hybrid_sleep_state; #endif // 0 - assert(STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")); + +#if 0 /// already parsed by elogind config + r = parse_sleep_config(verb, &allow, &modes, &states, NULL); + if (r < 0) + return false; + + if (check_allowed && !allow) { +#else + if (check_allowed && !STR_IN_SET(verb, "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate")) { +#endif // 0 + + log_debug("Sleep mode \"%s\" is disabled by configuration.", verb); + return false; + } if (streq(verb, "suspend-then-hibernate")) #if 0 /// elogind must transport a pointer to its managers instance @@ -405,12 +547,6 @@ int can_sleep(Manager *m, const char *verb) { return can_s2h(m); #endif // 0 -#if 0 /// already parsed by elogind config - r = parse_sleep_config(verb, &modes, &states, NULL); - if (r < 0) - return false; -#endif // 0 - if (!can_sleep_state(states) || !can_sleep_disk(modes)) return false; @@ -420,5 +556,22 @@ int can_sleep(Manager *m, const char *verb) { if (!enough_swap_for_hibernation()) return -ENOSPC; +#if 0 /// elogind is not init and can not check this + r = resume_configured(); + if (r <= 0) + /* We squash all errors (e.g. EPERM) into a single value for reporting. */ + return -EADV; +#endif // 0 + return true; } + +#if 0 /// elogind has to ask the manager for some stuff +int can_sleep(const char *verb) { + return can_sleep_internal(verb, true); +} +#else +int can_sleep(Manager *m, const char *verb) { + return can_sleep_internal(m, verb, true); +} +#endif // 0 |