chiark / gitweb /
core: general cgroup rework
[elogind.git] / src / core / main.c
index 4d21dd97a3e3873dd1d4cf431d0c8c650815a448..3c6fccf527d4adf7f0875b1a75cebce61182efac 100644 (file)
@@ -40,7 +40,7 @@
 #include "fdset.h"
 #include "special.h"
 #include "conf-parser.h"
-#include "bus-errors.h"
+#include "dbus-common.h"
 #include "missing.h"
 #include "label.h"
 #include "build.h"
@@ -55,6 +55,7 @@
 #include "env-util.h"
 #include "hwclock.h"
 #include "sd-daemon.h"
+#include "sd-messages.h"
 
 #include "mount-setup.h"
 #include "loopback-setup.h"
@@ -87,12 +88,12 @@ static int arg_crash_chvt = -1;
 static bool arg_confirm_spawn = false;
 static bool arg_show_status = true;
 static bool arg_switched_root = false;
-static char **arg_default_controllers = NULL;
 static char ***arg_join_controllers = NULL;
 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
 static usec_t arg_runtime_watchdog = 0;
 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
+static char **arg_default_environment = NULL;
 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
 static uint64_t arg_capability_bounding_set_drop = 0;
 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
@@ -104,7 +105,10 @@ static void nop_handler(int sig) {
 
 _noreturn_ static void crash(int sig) {
 
-        if (!arg_dump_core)
+        if (getpid() != 1)
+                /* Pass this on immediately, if this is not PID 1 */
+                raise(sig);
+        else if (!arg_dump_core)
                 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
         else {
                 struct sigaction sa = {
@@ -114,7 +118,7 @@ _noreturn_ static void crash(int sig) {
                 pid_t pid;
 
                 /* We want to wait for the core process, hence let's enable SIGCHLD */
-                assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
+                sigaction(SIGCHLD, &sa, NULL);
 
                 pid = fork();
                 if (pid < 0)
@@ -126,7 +130,7 @@ _noreturn_ static void crash(int sig) {
                         /* Enable default signal handler for core dump */
                         zero(sa);
                         sa.sa_handler = SIG_DFL;
-                        assert_se(sigaction(sig, &sa, NULL) == 0);
+                        sigaction(sig, &sa, NULL);
 
                         /* Don't limit the core dump size */
                         rl.rlim_cur = RLIM_INFINITY;
@@ -134,7 +138,7 @@ _noreturn_ static void crash(int sig) {
                         setrlimit(RLIMIT_CORE, &rl);
 
                         /* Just to be sure... */
-                        assert_se(chdir("/") == 0);
+                        chdir("/");
 
                         /* Raise the signal again */
                         raise(sig);
@@ -409,6 +413,8 @@ static int parse_proc_cmdline_word(const char *word) {
 
         } else if (streq(word, "quiet"))
                 arg_show_status = false;
+        else if (streq(word, "debug"))
+                log_set_max_level(LOG_DEBUG);
         else if (!in_initrd()) {
                 unsigned i;
 
@@ -421,87 +427,47 @@ static int parse_proc_cmdline_word(const char *word) {
         return 0;
 }
 
-static int config_parse_level2(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-
-        log_set_max_level_from_string(rvalue);
-        return 0;
-}
-
-static int config_parse_target(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-
-        log_set_target_from_string(rvalue);
-        return 0;
-}
-
-static int config_parse_color(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
+#define DEFINE_SETTER(name, func, descr)                              \
+        static int name(const char *unit,                             \
+                        const char *filename,                         \
+                        unsigned line,                                \
+                        const char *section,                          \
+                        const char *lvalue,                           \
+                        int ltype,                                    \
+                        const char *rvalue,                           \
+                        void *data,                                   \
+                        void *userdata) {                             \
+                                                                      \
+                int r;                                                \
+                                                                      \
+                assert(filename);                                     \
+                assert(lvalue);                                       \
+                assert(rvalue);                                       \
+                                                                      \
+                r = func(rvalue);                                     \
+                if (r < 0)                                            \
+                        log_syntax(unit, LOG_ERR, filename, line, -r, \
+                                   "Invalid " descr "'%s': %s",       \
+                                   rvalue, strerror(-r));             \
+                                                                      \
+                return 0;                                             \
+        }
 
-        log_show_color_from_string(rvalue);
-        return 0;
-}
+DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
+DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
+DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
+DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
 
-static int config_parse_location(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
 
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-
-        log_show_location_from_string(rvalue);
-        return 0;
-}
-
-static int config_parse_cpu_affinity2(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+static int config_parse_cpu_affinity2(const char *unit,
+                                      const char *filename,
+                                      unsigned line,
+                                      const char *section,
+                                      const char *lvalue,
+                                      int ltype,
+                                      const char *rvalue,
+                                      void *data,
+                                      void *userdata) {
 
         char *w;
         size_t l;
@@ -529,7 +495,8 @@ static int config_parse_cpu_affinity2(
                                 return log_oom();
 
                 if (r < 0 || cpu >= ncpus) {
-                        log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to parse CPU affinity '%s'", rvalue);
                         CPU_FREE(c);
                         return -EBADMSG;
                 }
@@ -539,7 +506,7 @@ static int config_parse_cpu_affinity2(
 
         if (c) {
                 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
-                        log_warning("Failed to set CPU affinity: %m");
+                        log_warning_unit(unit, "Failed to set CPU affinity: %m");
 
                 CPU_FREE(c);
         }
@@ -560,22 +527,19 @@ static void strv_free_free(char ***l) {
 }
 
 static void free_join_controllers(void) {
-        if (!arg_join_controllers)
-                return;
-
         strv_free_free(arg_join_controllers);
         arg_join_controllers = NULL;
 }
 
-static int config_parse_join_controllers(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+static int config_parse_join_controllers(const char *unit,
+                                         const char *filename,
+                                         unsigned line,
+                                         const char *section,
+                                         const char *lvalue,
+                                         int ltype,
+                                         const char *rvalue,
+                                         void *data,
+                                         void *userdata) {
 
         unsigned n = 0;
         char *state, *w;
@@ -677,7 +641,6 @@ static int parse_config_file(void) {
                 { "Manager", "ShowStatus",            config_parse_bool,         0, &arg_show_status         },
                 { "Manager", "CrashChVT",             config_parse_int,          0, &arg_crash_chvt          },
                 { "Manager", "CPUAffinity",           config_parse_cpu_affinity2, 0, NULL                    },
-                { "Manager", "DefaultControllers",    config_parse_strv,         0, &arg_default_controllers },
                 { "Manager", "DefaultStandardOutput", config_parse_output,       0, &arg_default_std_output  },
                 { "Manager", "DefaultStandardError",  config_parse_output,       0, &arg_default_std_error   },
                 { "Manager", "JoinControllers",       config_parse_join_controllers, 0, &arg_join_controllers },
@@ -685,6 +648,7 @@ static int parse_config_file(void) {
                 { "Manager", "ShutdownWatchdogSec",   config_parse_sec,          0, &arg_shutdown_watchdog   },
                 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
                 { "Manager", "TimerSlackNSec",        config_parse_nsec,         0, &arg_timer_slack_nsec    },
+                { "Manager", "DefaultEnvironment",    config_parse_environ,      0, &arg_default_environment },
                 { "Manager", "DefaultLimitCPU",       config_parse_limit,        0, &arg_default_rlimit[RLIMIT_CPU]},
                 { "Manager", "DefaultLimitFSIZE",     config_parse_limit,        0, &arg_default_rlimit[RLIMIT_FSIZE]},
                 { "Manager", "DefaultLimitDATA",      config_parse_limit,        0, &arg_default_rlimit[RLIMIT_DATA]},
@@ -704,11 +668,11 @@ static int parse_config_file(void) {
                 { NULL, NULL, NULL, 0, NULL }
         };
 
-        FILE *f;
+        _cleanup_fclose_ FILE *f;
         const char *fn;
         int r;
 
-        fn = arg_running_as == SYSTEMD_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
+        fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
         f = fopen(fn, "re");
         if (!f) {
                 if (errno == ENOENT)
@@ -718,17 +682,16 @@ static int parse_config_file(void) {
                 return 0;
         }
 
-        r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
+        r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
         if (r < 0)
                 log_warning("Failed to parse configuration file: %s", strerror(-r));
 
-        fclose(f);
-
         return 0;
 }
 
 static int parse_proc_cmdline(void) {
-        char *line, *w, *state;
+        _cleanup_free_ char *line = NULL;
+        char *w, *state;
         int r;
         size_t l;
 
@@ -737,34 +700,27 @@ static int parse_proc_cmdline(void) {
         if (detect_container(NULL) > 0)
                 return 0;
 
-        if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
+        r = read_one_line_file("/proc/cmdline", &line);
+        if (r < 0) {
                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
                 return 0;
         }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
-                char *word;
+                _cleanup_free_ char *word;
 
-                if (!(word = strndup(w, l))) {
-                        r = -ENOMEM;
-                        goto finish;
-                }
+                word = strndup(w, l);
+                if (!word)
+                        return log_oom();
 
                 r = parse_proc_cmdline_word(word);
                 if (r < 0) {
                         log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
-                        free(word);
-                        goto finish;
+                        return r;
                 }
-
-                free(word);
         }
 
-        r = 0;
-
-finish:
-        free(line);
-        return r;
+        return 0;
 }
 
 static int parse_argv(int argc, char *argv[]) {
@@ -1090,7 +1046,7 @@ static int version(void) {
         return 0;
 }
 
-static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool serialize_jobs) {
+static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
         FILE *f = NULL;
         FDSet *fds = NULL;
         int r;
@@ -1115,7 +1071,7 @@ static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool serialize
                 goto fail;
         }
 
-        r = manager_serialize(m, f, fds, serialize_jobs);
+        r = manager_serialize(m, f, fds, switching_root);
         if (r < 0) {
                 log_error("Failed to serialize state: %s", strerror(-r));
                 goto fail;
@@ -1265,14 +1221,14 @@ static int initialize_join_controllers(void) {
                 return -ENOMEM;
 
         arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
-        if (!arg_join_controllers[0])
-                return -ENOMEM;
-
         arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
-        if (!arg_join_controllers[1])
+        arg_join_controllers[2] = NULL;
+
+        if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
+                free_join_controllers();
                 return -ENOMEM;
+        }
 
-        arg_join_controllers[2] = NULL;
         return 0;
 }
 
@@ -1285,6 +1241,8 @@ int main(int argc, char *argv[]) {
         bool reexecute = false;
         const char *shutdown_verb = NULL;
         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
+        dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
+        dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
         static char systemd[] = "systemd";
         bool skip_setup = false;
         int j;
@@ -1306,6 +1264,9 @@ int main(int argc, char *argv[]) {
         }
 #endif
 
+        dual_timestamp_from_monotonic(&kernel_timestamp, 0);
+        dual_timestamp_get(&userspace_timestamp);
+
         /* Determine if this is a reexecution or normal bootup. We do
          * the full command line parsing much later, so let's just
          * have a quick peek here. */
@@ -1340,7 +1301,7 @@ int main(int argc, char *argv[]) {
                 if (in_initrd()) {
                         char *rd_timestamp = NULL;
 
-                        dual_timestamp_get(&initrd_timestamp);
+                        initrd_timestamp = userspace_timestamp;
                         asprintf(&rd_timestamp, "%llu %llu",
                                  (unsigned long long) initrd_timestamp.realtime,
                                  (unsigned long long) initrd_timestamp.monotonic);
@@ -1400,7 +1361,6 @@ int main(int argc, char *argv[]) {
                 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
 
         } else if (getpid() == 1) {
-
                 /* Running inside a container, as PID 1 */
                 arg_running_as = SYSTEMD_SYSTEM;
                 log_set_target(LOG_TARGET_CONSOLE);
@@ -1409,12 +1369,21 @@ int main(int argc, char *argv[]) {
                 /* For the later on, see above... */
                 log_set_target(LOG_TARGET_JOURNAL);
 
-        } else {
+                /* clear the kernel timestamp,
+                 * because we are in a container */
+                kernel_timestamp.monotonic = 0ULL;
+                kernel_timestamp.realtime = 0ULL;
 
+        } else {
                 /* Running as user instance */
                 arg_running_as = SYSTEMD_USER;
                 log_set_target(LOG_TARGET_AUTO);
                 log_open();
+
+                /* clear the kernel timestamp,
+                 * because we are not PID 1 */
+                kernel_timestamp.monotonic = 0ULL;
+                kernel_timestamp.realtime = 0ULL;
         }
 
         /* Initialize default unit */
@@ -1439,7 +1408,6 @@ int main(int argc, char *argv[]) {
         /* Reset all signal handlers. */
         assert_se(reset_all_signal_handlers() == 0);
 
-        /* If we are init, we can block sigkill. Yay. */
         ignore_signals(SIGNALS_IGNORE, -1);
 
         if (parse_config_file() < 0)
@@ -1656,14 +1624,14 @@ int main(int argc, char *argv[]) {
         m->default_std_error = arg_default_std_error;
         m->runtime_watchdog = arg_runtime_watchdog;
         m->shutdown_watchdog = arg_shutdown_watchdog;
+        m->userspace_timestamp = userspace_timestamp;
+        m->kernel_timestamp = kernel_timestamp;
+        m->initrd_timestamp = initrd_timestamp;
 
         manager_set_default_rlimits(m, arg_default_rlimit);
 
-        if (dual_timestamp_is_set(&initrd_timestamp))
-                m->initrd_timestamp = initrd_timestamp;
-
-        if (arg_default_controllers)
-                manager_set_default_controllers(m, arg_default_controllers);
+        if (arg_default_environment)
+                manager_set_default_environment(m, arg_default_environment);
 
         manager_set_show_status(m, arg_show_status);
 
@@ -1729,7 +1697,7 @@ int main(int argc, char *argv[]) {
 
                 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
                 if (r == -EPERM) {
-                        log_error("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
+                        log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
                         dbus_error_free(&error);
 
                         r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
@@ -1782,7 +1750,7 @@ int main(int argc, char *argv[]) {
 
                 case MANAGER_REEXECUTE:
 
-                        if (prepare_reexecute(m, &serialization, &fds, true) < 0)
+                        if (prepare_reexecute(m, &serialization, &fds, false) < 0)
                                 goto finish;
 
                         reexecute = true;
@@ -1796,7 +1764,7 @@ int main(int argc, char *argv[]) {
                         m->switch_root = m->switch_root_init = NULL;
 
                         if (!switch_root_init)
-                                if (prepare_reexecute(m, &serialization, &fds, false) < 0)
+                                if (prepare_reexecute(m, &serialization, &fds, true) < 0)
                                         goto finish;
 
                         reexecute = true;
@@ -1834,7 +1802,6 @@ finish:
                 free(arg_default_rlimit[j]);
 
         free(arg_default_unit);
-        strv_free(arg_default_controllers);
         free_join_controllers();
 
         dbus_shutdown();