diff options
| author | Kay Sievers <kay@vrfy.org> | 2012-04-11 12:59:52 +0200 |
|---|---|---|
| committer | Kay Sievers <kay@vrfy.org> | 2012-04-11 16:03:51 +0200 |
| commit | b30e2f4c18ad81b04e4314fd191a5d458553773c (patch) | |
| tree | de15b901a08d681a7a1e95c7a2d692b0ec181708 /src/manager.c | |
| parent | 9543ad166338a7bef8718070f11465df4b9badd7 (diff) | |
move libsystemd_core.la sources into core/
Diffstat (limited to 'src/manager.c')
| -rw-r--r-- | src/manager.c | 3235 |
1 files changed, 0 insertions, 3235 deletions
diff --git a/src/manager.c b/src/manager.c deleted file mode 100644 index 312527aa9c..0000000000 --- a/src/manager.c +++ /dev/null @@ -1,3235 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 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 - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <assert.h> -#include <errno.h> -#include <string.h> -#include <sys/epoll.h> -#include <signal.h> -#include <sys/signalfd.h> -#include <sys/wait.h> -#include <unistd.h> -#include <sys/poll.h> -#include <sys/reboot.h> -#include <sys/ioctl.h> -#include <linux/kd.h> -#include <termios.h> -#include <fcntl.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <dirent.h> - -#ifdef HAVE_AUDIT -#include <libaudit.h> -#endif - -#include <systemd/sd-daemon.h> - -#include "manager.h" -#include "hashmap.h" -#include "macro.h" -#include "strv.h" -#include "log.h" -#include "util.h" -#include "mkdir.h" -#include "ratelimit.h" -#include "cgroup.h" -#include "mount-setup.h" -#include "unit-name.h" -#include "dbus-unit.h" -#include "dbus-job.h" -#include "missing.h" -#include "path-lookup.h" -#include "special.h" -#include "bus-errors.h" -#include "exit-status.h" -#include "virt.h" -#include "watchdog.h" - -/* As soon as 16 units are in our GC queue, make sure to run a gc sweep */ -#define GC_QUEUE_ENTRIES_MAX 16 - -/* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */ -#define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC) - -/* Where clients shall send notification messages to */ -#define NOTIFY_SOCKET_SYSTEM "/run/systemd/notify" -#define NOTIFY_SOCKET_USER "@/org/freedesktop/systemd1/notify" - -static int manager_setup_notify(Manager *m) { - union { - struct sockaddr sa; - struct sockaddr_un un; - } sa; - struct epoll_event ev; - int one = 1, r; - mode_t u; - - assert(m); - - m->notify_watch.type = WATCH_NOTIFY; - if ((m->notify_watch.fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) { - log_error("Failed to allocate notification socket: %m"); - return -errno; - } - - zero(sa); - sa.sa.sa_family = AF_UNIX; - - if (getpid() != 1) - snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET_USER "/%llu", random_ull()); - else { - unlink(NOTIFY_SOCKET_SYSTEM); - strncpy(sa.un.sun_path, NOTIFY_SOCKET_SYSTEM, sizeof(sa.un.sun_path)); - } - - if (sa.un.sun_path[0] == '@') - sa.un.sun_path[0] = 0; - - u = umask(0111); - r = bind(m->notify_watch.fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)); - umask(u); - - if (r < 0) { - log_error("bind() failed: %m"); - return -errno; - } - - if (setsockopt(m->notify_watch.fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) { - log_error("SO_PASSCRED failed: %m"); - return -errno; - } - - zero(ev); - ev.events = EPOLLIN; - ev.data.ptr = &m->notify_watch; - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->notify_watch.fd, &ev) < 0) - return -errno; - - if (sa.un.sun_path[0] == 0) - sa.un.sun_path[0] = '@'; - - if (!(m->notify_socket = strdup(sa.un.sun_path))) - return -ENOMEM; - - log_debug("Using notification socket %s", m->notify_socket); - - return 0; -} - -static int enable_special_signals(Manager *m) { - int fd; - - assert(m); - - /* Enable that we get SIGINT on control-alt-del */ - if (reboot(RB_DISABLE_CAD) < 0) - log_warning("Failed to enable ctrl-alt-del handling: %m"); - - if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0) - log_warning("Failed to open /dev/tty0: %m"); - else { - /* Enable that we get SIGWINCH on kbrequest */ - if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0) - log_warning("Failed to enable kbrequest handling: %s", strerror(errno)); - - close_nointr_nofail(fd); - } - - return 0; -} - -static int manager_setup_signals(Manager *m) { - sigset_t mask; - struct epoll_event ev; - struct sigaction sa; - - assert(m); - - /* We are not interested in SIGSTOP and friends. */ - zero(sa); - sa.sa_handler = SIG_DFL; - sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; - assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); - - assert_se(sigemptyset(&mask) == 0); - - sigset_add_many(&mask, - SIGCHLD, /* Child died */ - SIGTERM, /* Reexecute daemon */ - SIGHUP, /* Reload configuration */ - SIGUSR1, /* systemd/upstart: reconnect to D-Bus */ - SIGUSR2, /* systemd: dump status */ - SIGINT, /* Kernel sends us this on control-alt-del */ - SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */ - SIGPWR, /* Some kernel drivers and upsd send us this on power failure */ - SIGRTMIN+0, /* systemd: start default.target */ - SIGRTMIN+1, /* systemd: isolate rescue.target */ - SIGRTMIN+2, /* systemd: isolate emergency.target */ - SIGRTMIN+3, /* systemd: start halt.target */ - SIGRTMIN+4, /* systemd: start poweroff.target */ - SIGRTMIN+5, /* systemd: start reboot.target */ - SIGRTMIN+6, /* systemd: start kexec.target */ - SIGRTMIN+13, /* systemd: Immediate halt */ - SIGRTMIN+14, /* systemd: Immediate poweroff */ - SIGRTMIN+15, /* systemd: Immediate reboot */ - SIGRTMIN+16, /* systemd: Immediate kexec */ - SIGRTMIN+20, /* systemd: enable status messages */ - SIGRTMIN+21, /* systemd: disable status messages */ - SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */ - SIGRTMIN+23, /* systemd: set log level to LOG_INFO */ - SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */ - SIGRTMIN+27, /* systemd: set log target to console */ - SIGRTMIN+28, /* systemd: set log target to kmsg */ - SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */ - -1); - assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); - - m->signal_watch.type = WATCH_SIGNAL; - if ((m->signal_watch.fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) - return -errno; - - zero(ev); - ev.events = EPOLLIN; - ev.data.ptr = &m->signal_watch; - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0) - return -errno; - - if (m->running_as == MANAGER_SYSTEM) - return enable_special_signals(m); - - return 0; -} - -static void manager_strip_environment(Manager *m) { - assert(m); - - /* Remove variables from the inherited set that are part of - * the container interface: - * http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface */ - strv_remove_prefix(m->environment, "container="); - strv_remove_prefix(m->environment, "container_"); - - /* Remove variables from the inherited set that are part of - * the initrd interface: - * http://www.freedesktop.org/wiki/Software/systemd/InitrdInterface */ - strv_remove_prefix(m->environment, "RD_"); -} - -int manager_new(ManagerRunningAs running_as, Manager **_m) { - Manager *m; - int r = -ENOMEM; - - assert(_m); - assert(running_as >= 0); - assert(running_as < _MANAGER_RUNNING_AS_MAX); - - if (!(m = new0(Manager, 1))) - return -ENOMEM; - - dual_timestamp_get(&m->startup_timestamp); - - m->running_as = running_as; - m->name_data_slot = m->conn_data_slot = m->subscribed_data_slot = -1; - m->exit_code = _MANAGER_EXIT_CODE_INVALID; - m->pin_cgroupfs_fd = -1; - -#ifdef HAVE_AUDIT - m->audit_fd = -1; -#endif - - m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = m->swap_watch.fd = -1; - m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */ - - m->environment = strv_copy(environ); - if (!m->environment) - goto fail; - - manager_strip_environment(m); - - if (running_as == MANAGER_SYSTEM) { - m->default_controllers = strv_new("cpu", NULL); - if (!m->default_controllers) - goto fail; - } - - if (!(m->units = hashmap_new(string_hash_func, string_compare_func))) - goto fail; - - if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func))) - goto fail; - - if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func))) - goto fail; - - if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func))) - goto fail; - - if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func))) - goto fail; - - if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func))) - goto fail; - - if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0) - goto fail; - - if ((r = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0) - goto fail; - - if ((r = manager_setup_signals(m)) < 0) - goto fail; - - if ((r = manager_setup_cgroup(m)) < 0) - goto fail; - - if ((r = manager_setup_notify(m)) < 0) - goto fail; - - /* Try to connect to the busses, if possible. */ - if ((r = bus_init(m, running_as != MANAGER_SYSTEM)) < 0) - goto fail; - -#ifdef HAVE_AUDIT - if ((m->audit_fd = audit_open()) < 0 && - /* If the kernel lacks netlink or audit support, - * don't worry about it. */ - errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT) - log_error("Failed to connect to audit log: %m"); -#endif - - m->taint_usr = dir_is_empty("/usr") > 0; - - *_m = m; - return 0; - -fail: - manager_free(m); - return r; -} - -static unsigned manager_dispatch_cleanup_queue(Manager *m) { - Unit *u; - unsigned n = 0; - - assert(m); - - while ((u = m->cleanup_queue)) { - assert(u->in_cleanup_queue); - - unit_free(u); - n++; - } - - return n; -} - -enum { - GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */ - GC_OFFSET_UNSURE, /* No clue */ - GC_OFFSET_GOOD, /* We still need this unit */ - GC_OFFSET_BAD, /* We don't need this unit anymore */ - _GC_OFFSET_MAX -}; - -static void unit_gc_sweep(Unit *u, unsigned gc_marker) { - Iterator i; - Unit *other; - bool is_bad; - - assert(u); - - if (u->gc_marker == gc_marker + GC_OFFSET_GOOD || - u->gc_marker == gc_marker + GC_OFFSET_BAD || - u->gc_marker == gc_marker + GC_OFFSET_IN_PATH) - return; - - if (u->in_cleanup_queue) - goto bad; - - if (unit_check_gc(u)) - goto good; - - u->gc_marker = gc_marker + GC_OFFSET_IN_PATH; - - is_bad = true; - - SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) { - unit_gc_sweep(other, gc_marker); - - if (other->gc_marker == gc_marker + GC_OFFSET_GOOD) - goto good; - - if (other->gc_marker != gc_marker + GC_OFFSET_BAD) - is_bad = false; - } - - if (is_bad) - goto bad; - - /* We were unable to find anything out about this entry, so - * let's investigate it later */ - u->gc_marker = gc_marker + GC_OFFSET_UNSURE; - unit_add_to_gc_queue(u); - return; - -bad: - /* We definitely know that this one is not useful anymore, so - * let's mark it for deletion */ - u->gc_marker = gc_marker + GC_OFFSET_BAD; - unit_add_to_cleanup_queue(u); - return; - -good: - u->gc_marker = gc_marker + GC_OFFSET_GOOD; -} - -static unsigned manager_dispatch_gc_queue(Manager *m) { - Unit *u; - unsigned n = 0; - unsigned gc_marker; - - assert(m); - - if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) && - (m->gc_queue_timestamp <= 0 || - (m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC))) - return 0; - - log_debug("Running GC..."); - - m->gc_marker += _GC_OFFSET_MAX; - if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX) - m->gc_marker = 1; - - gc_marker = m->gc_marker; - - while ((u = m->gc_queue)) { - assert(u->in_gc_queue); - - unit_gc_sweep(u, gc_marker); - - LIST_REMOVE(Unit, gc_queue, m->gc_queue, u); - u->in_gc_queue = false; - - n++; - - if (u->gc_marker == gc_marker + GC_OFFSET_BAD || - u->gc_marker == gc_marker + GC_OFFSET_UNSURE) { - log_debug("Collecting %s", u->id); - u->gc_marker = gc_marker + GC_OFFSET_BAD; - unit_add_to_cleanup_queue(u); - } - } - - m->n_in_gc_queue = 0; - m->gc_queue_timestamp = 0; - - return n; -} - -static void manager_clear_jobs_and_units(Manager *m) { - Job *j; - Unit *u; - - assert(m); - - while ((j = hashmap_first(m->transaction_jobs))) - job_free(j); - - while ((u = hashmap_first(m->units))) - unit_free(u); - - manager_dispatch_cleanup_queue(m); - - assert(!m->load_queue); - assert(!m->run_queue); - assert(!m->dbus_unit_queue); - assert(!m->dbus_job_queue); - assert(!m->cleanup_queue); - assert(!m->gc_queue); - - assert(hashmap_isempty(m->transaction_jobs)); - assert(hashmap_isempty(m->jobs)); - assert(hashmap_isempty(m->units)); -} - -void manager_free(Manager *m) { - UnitType c; - - assert(m); - - manager_clear_jobs_and_units(m); - - for (c = 0; c < _UNIT_TYPE_MAX; c++) - if (unit_vtable[c]->shutdown) - unit_vtable[c]->shutdown(m); - - /* If we reexecute ourselves, we keep the root cgroup - * around */ - manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE); - - manager_undo_generators(m); - - bus_done(m); - - hashmap_free(m->units); - hashmap_free(m->jobs); - hashmap_free(m->transaction_jobs); - hashmap_free(m->watch_pids); - hashmap_free(m->watch_bus); - - if (m->epoll_fd >= 0) - close_nointr_nofail(m->epoll_fd); - if (m->signal_watch.fd >= 0) - close_nointr_nofail(m->signal_watch.fd); - if (m->notify_watch.fd >= 0) - close_nointr_nofail(m->notify_watch.fd); - -#ifdef HAVE_AUDIT - if (m->audit_fd >= 0) - audit_close(m->audit_fd); -#endif - - free(m->notify_socket); - - lookup_paths_free(&m->lookup_paths); - strv_free(m->environment); - - strv_free(m->default_controllers); - - hashmap_free(m->cgroup_bondings); - set_free_free(m->unit_path_cache); - - free(m); -} - -int manager_enumerate(Manager *m) { - int r = 0, q; - UnitType c; - - assert(m); - - /* Let's ask every type to load all units from disk/kernel - * that it might know */ - for (c = 0; c < _UNIT_TYPE_MAX; c++) - if (unit_vtable[c]->enumerate) - if ((q = unit_vtable[c]->enumerate(m)) < 0) - r = q; - - manager_dispatch_load_queue(m); - return r; -} - -int manager_coldplug(Manager *m) { - int r = 0, q; - Iterator i; - Unit *u; - char *k; - - assert(m); - - /* Then, let's set up their initial state. */ - HASHMAP_FOREACH_KEY(u, k, m->units, i) { - - /* ignore aliases */ - if (u->id != k) - continue; - - if ((q = unit_coldplug(u)) < 0) - r = q; - } - - return r; -} - -static void manager_build_unit_path_cache(Manager *m) { - char **i; - DIR *d = NULL; - int r; - - assert(m); - - set_free_free(m->unit_path_cache); - - if (!(m->unit_path_cache = set_new(string_hash_func, string_compare_func))) { - log_error("Failed to allocate unit path cache."); - return; - } - - /* This simply builds a list of files we know exist, so that - * we don't always have to go to disk */ - - STRV_FOREACH(i, m->lookup_paths.unit_path) { - struct dirent *de; - - if (!(d = opendir(*i))) { - log_error("Failed to open directory: %m"); - continue; - } - - while ((de = readdir(d))) { - char *p; - - if (ignore_file(de->d_name)) - continue; - - p = join(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL); - if (!p) { - r = -ENOMEM; - goto fail; - } - - if ((r = set_put(m->unit_path_cache, p)) < 0) { - free(p); - goto fail; - } - } - - closedir(d); - d = NULL; - } - - return; - -fail: - log_error("Failed to build unit path cache: %s", strerror(-r)); - - set_free_free(m->unit_path_cache); - m->unit_path_cache = NULL; - - if (d) - closedir(d); -} - -int manager_startup(Manager *m, FILE *serialization, FDSet *fds) { - int r, q; - - assert(m); - - manager_run_generators(m); - - manager_build_unit_path_cache(m); - - /* If we will deserialize make sure that during enumeration - * this is already known, so we increase the counter here - * already */ - if (serialization) - m->n_reloading ++; - - /* First, enumerate what we can from all config files */ - r = manager_enumerate(m); - - /* Second, deserialize if there is something to deserialize */ - if (serialization) - if ((q = manager_deserialize(m, serialization, fds)) < 0) - r = q; - - /* Third, fire things up! */ - if ((q = manager_coldplug(m)) < 0) - r = q; - - if (serialization) { - assert(m->n_reloading > 0); - m->n_reloading --; - } - - return r; -} - -static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) { - assert(m); - assert(j); - - /* Deletes one job from the transaction */ - - manager_transaction_unlink_job(m, j, delete_dependencies); - - if (!j->installed) - job_free(j); -} - -static void transaction_delete_unit(Manager *m, Unit *u) { - Job *j; - - /* Deletes all jobs associated with a certain unit from the - * transaction */ - - while ((j = hashmap_get(m->transaction_jobs, u))) - transaction_delete_job(m, j, true); -} - -static void transaction_clean_dependencies(Manager *m) { - Iterator i; - Job *j; - - assert(m); - - /* Drops all dependencies of all installed jobs */ - - HASHMAP_FOREACH(j, m->jobs, i) { - while (j->subject_list) - job_dependency_free(j->subject_list); - while (j->object_list) - job_dependency_free(j->object_list); - } - - assert(!m->transaction_anchor); -} - -static void transaction_abort(Manager *m) { - Job *j; - - assert(m); - - while ((j = hashmap_first(m->transaction_jobs))) - if (j->installed) - transaction_delete_job(m, j, true); - else - job_free(j); - - assert(hashmap_isempty(m->transaction_jobs)); - - transaction_clean_dependencies(m); -} - -static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) { - JobDependency *l; - - assert(m); - - /* A recursive sweep through the graph that marks all units - * that matter to the anchor job, i.e. are directly or - * indirectly a dependency of the anchor job via paths that - * are fully marked as mattering. */ - - if (j) - l = j->subject_list; - else - l = m->transaction_anchor; - - LIST_FOREACH(subject, l, l) { - - /* This link does not matter */ - if (!l->matters) - continue; - - /* This unit has already been marked */ - if (l->object->generation == generation) - continue; - - l->object->matters_to_anchor = true; - l->object->generation = generation; - - transaction_find_jobs_that_matter_to_anchor(m, l->object, generation); - } -} - -static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) { - JobDependency *l, *last; - - assert(j); - assert(other); - assert(j->unit == other->unit); - assert(!j->installed); - - /* Merges 'other' into 'j' and then deletes j. */ - - j->type = t; - j->state = JOB_WAITING; - j->override = j->override || other->override; - - j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor; - - /* Patch us in as new owner of the JobDependency objects */ - last = NULL; - LIST_FOREACH(subject, l, other->subject_list) { - assert(l->subject == other); - l->subject = j; - last = l; - } - - /* Merge both lists */ - if (last) { - last->subject_next = j->subject_list; - if (j->subject_list) - j->subject_list->subject_prev = last; - j->subject_list = other->subject_list; - } - - /* Patch us in as new owner of the JobDependency objects */ - last = NULL; - LIST_FOREACH(object, l, other->object_list) { - assert(l->object == other); - l->object = j; - last = l; - } - - /* Merge both lists */ - if (last) { - last->object_next = j->object_list; - if (j->object_list) - j->object_list->object_prev = last; - j->object_list = other->object_list; - } - - /* Kill the other job */ - other->subject_list = NULL; - other->object_list = NULL; - transaction_delete_job(m, other, true); -} -static bool job_is_conflicted_by(Job *j) { - JobDependency *l; - - assert(j); - - /* Returns true if this job is pulled in by a least one - * ConflictedBy dependency. */ - - LIST_FOREACH(object, l, j->object_list) - if (l->conflicts) - return true; - - return false; -} - -static int delete_one_unmergeable_job(Manager *m, Job *j) { - Job *k; - - assert(j); - - /* Tries to delete one item in the linked list - * j->transaction_next->transaction_next->... that conflicts - * with another one, in an attempt to make an inconsistent - * transaction work. */ - - /* We rely here on the fact that if a merged with b does not - * merge with c, either a or b merge with c neither */ - LIST_FOREACH(transaction, j, j) - LIST_FOREACH(transaction, k, j->transaction_next) { - Job *d; - - /* Is this one mergeable? Then skip it */ - if (job_type_is_mergeable(j->type, k->type)) - continue; - - /* Ok, we found two that conflict, let's see if we can - * drop one of them */ - if (!j->matters_to_anchor && !k->matters_to_anchor) { - - /* Both jobs don't matter, so let's - * find the one that is smarter to - * remove. Let's think positive and - * rather remove stops then starts -- - * except if something is being - * stopped because it is conflicted by - * another unit in which case we - * rather remove the start. */ - - log_debug("Looking at job %s/%s conflicted_by=%s", j->unit->id, job_type_to_string(j->type), yes_no(j->type == JOB_STOP && job_is_conflicted_by(j))); - log_debug("Looking at job %s/%s conflicted_by=%s", k->unit->id, job_type_to_string(k->type), yes_no(k->type == JOB_STOP && job_is_conflicted_by(k))); - - if (j->type == JOB_STOP) { - - if (job_is_conflicted_by(j)) - d = k; - else - d = j; - - } else if (k->type == JOB_STOP) { - - if (job_is_conflicted_by(k)) - d = j; - else - d = k; - } else - d = j; - - } else if (!j->matters_to_anchor) - d = j; - else if (!k->matters_to_anchor) - d = k; - else - return -ENOEXEC; - - /* Ok, we can drop one, so let's do so. */ - log_debug("Fixing conflicting jobs by deleting job %s/%s", d->unit->id, job_type_to_string(d->type)); - transaction_delete_job(m, d, true); - return 0; - } - - return -EINVAL; -} - -static int transaction_merge_jobs(Manager *m, DBusError *e) { - Job *j; - Iterator i; - int r; - - assert(m); - - /* First step, check whether any of the jobs for one specific - * task conflict. If so, try to drop one of them. */ - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - JobType t; - Job *k; - - t = j->type; - LIST_FOREACH(transaction, k, j->transaction_next) { - if (job_type_merge(&t, k->type) >= 0) - continue; - - /* OK, we could not merge all jobs for this - * action. Let's see if we can get rid of one - * of them */ - - if ((r = delete_one_unmergeable_job(m, j)) >= 0) - /* Ok, we managed to drop one, now - * let's ask our callers to call us - * again after garbage collecting */ - return -EAGAIN; - - /* We couldn't merge anything. Failure */ - dbus_set_error(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.", - job_type_to_string(t), job_type_to_string(k->type), k->unit->id); - return r; - } - } - - /* Second step, merge the jobs. */ - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - JobType t = j->type; - Job *k; - - /* Merge all transactions */ - LIST_FOREACH(transaction, k, j->transaction_next) - assert_se(job_type_merge(&t, k->type) == 0); - - /* If an active job is mergeable, merge it too */ - if (j->unit->job) - job_type_merge(&t, j->unit->job->type); /* Might fail. Which is OK */ - - while ((k = j->transaction_next)) { - if (j->installed) { - transaction_merge_and_delete_job(m, k, j, t); - j = k; - } else - transaction_merge_and_delete_job(m, j, k, t); - } - - if (j->unit->job && !j->installed) - transaction_merge_and_delete_job(m, j, j->unit->job, t); - - assert(!j->transaction_next); - assert(!j->transaction_prev); - } - - return 0; -} - -static void transaction_drop_redundant(Manager *m) { - bool again; - - assert(m); - - /* Goes through the transaction and removes all jobs that are - * a noop */ - - do { - Job *j; - Iterator i; - - again = false; - - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - bool changes_something = false; - Job *k; - - LIST_FOREACH(transaction, k, j) { - - if (!job_is_anchor(k) && - (k->installed || job_type_is_redundant(k->type, unit_active_state(k->unit))) && - (!k->unit->job || !job_type_is_conflicting(k->type, k->unit->job->type))) - continue; - - changes_something = true; - break; - } - - if (changes_something) - continue; - - /* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */ - transaction_delete_job(m, j, false); - again = true; - break; - } - - } while (again); -} - -static bool unit_matters_to_anchor(Unit *u, Job *j) { - assert(u); - assert(!j->transaction_prev); - - /* Checks whether at least one of the jobs for this unit - * matters to the anchor. */ - - LIST_FOREACH(transaction, j, j) - if (j->matters_to_anchor) - return true; - - return false; -} - -static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation, DBusError *e) { - Iterator i; - Unit *u; - int r; - - assert(m); - assert(j); - assert(!j->transaction_prev); - - /* Does a recursive sweep through the ordering graph, looking - * for a cycle. If we find cycle we try to break it. */ - - /* Have we seen this before? */ - if (j->generation == generation) { - Job *k, *delete; - - /* If the marker is NULL we have been here already and - * decided the job was loop-free from here. Hence - * shortcut things and return right-away. */ - if (!j->marker) - return 0; - - /* So, the marker is not NULL and we already have been - * here. We have a cycle. Let's try to break it. We go - * backwards in our path and try to find a suitable - * job to remove. We use the marker to find our way - * back, since smart how we are we stored our way back - * in there. */ - log_warning("Found ordering cycle on %s/%s", j->unit->id, job_type_to_string(j->type)); - - delete = NULL; - for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) { - - log_info("Walked on cycle path to %s/%s", k->unit->id, job_type_to_string(k->type)); - - if (!delete && - !k->installed && - !unit_matters_to_anchor(k->unit, k)) { - /* Ok, we can drop this one, so let's - * do so. */ - delete = k; - } - - /* Check if this in fact was the beginning of - * the cycle */ - if (k == j) - break; - } - - - if (delete) { - log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->id, job_type_to_string(delete->type)); - transaction_delete_unit(m, delete->unit); - return -EAGAIN; - } - - log_error("Unable to break cycle"); - - dbus_set_error(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, "Transaction order is cyclic. See system logs for details."); - return -ENOEXEC; - } - - /* Make the marker point to where we come from, so that we can - * find our way backwards if we want to break a cycle. We use - * a special marker for the beginning: we point to - * ourselves. */ - j->marker = from ? from : j; - j->generation = generation; - - /* We assume that the the dependencies are bidirectional, and - * hence can ignore UNIT_AFTER */ - SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) { - Job *o; - - /* Is there a job for this unit? */ - if (!(o = hashmap_get(m->transaction_jobs, u))) - - /* Ok, there is no job for this in the - * transaction, but maybe there is already one - * running? */ - if (!(o = u->job)) - continue; - - if ((r = transaction_verify_order_one(m, o, j, generation, e)) < 0) - return r; - } - - /* Ok, let's backtrack, and remember that this entry is not on - * our path anymore. */ - j->marker = NULL; - - return 0; -} - -static int transaction_verify_order(Manager *m, unsigned *generation, DBusError *e) { - Job *j; - int r; - Iterator i; - unsigned g; - - assert(m); - assert(generation); - - /* Check if the ordering graph is cyclic. If it is, try to fix - * that up by dropping one of the jobs. */ - - g = (*generation)++; - - HASHMAP_FOREACH(j, m->transaction_jobs, i) - if ((r = transaction_verify_order_one(m, j, NULL, g, e)) < 0) - return r; - - return 0; -} - -static void transaction_collect_garbage(Manager *m) { - bool again; - - assert(m); - - /* Drop jobs that are not required by any other job */ - - do { - Iterator i; - Job *j; - - again = false; - - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - if (j->object_list) { - /* log_debug("Keeping job %s/%s because of %s/%s", */ - /* j->unit->id, job_type_to_string(j->type), */ - /* j->object_list->subject ? j->object_list->subject->unit->id : "root", */ - /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */ - continue; - } - - /* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */ - transaction_delete_job(m, j, true); - again = true; - break; - } - - } while (again); -} - -static int transaction_is_destructive(Manager *m, DBusError *e) { - Iterator i; - Job *j; - - assert(m); - - /* Checks whether applying this transaction means that - * existing jobs would be replaced */ - - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - - /* Assume merged */ - assert(!j->transaction_prev); - assert(!j->transaction_next); - - if (j->unit->job && - j->unit->job != j && - !job_type_is_superset(j->type, j->unit->job->type)) { - - dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive."); - return -EEXIST; - } - } - - return 0; -} - -static void transaction_minimize_impact(Manager *m) { - bool again; - assert(m); - - /* Drops all unnecessary jobs that reverse already active jobs - * or that stop a running service. */ - - do { - Job *j; - Iterator i; - - again = false; - - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - LIST_FOREACH(transaction, j, j) { - bool stops_running_service, changes_existing_job; - - /* If it matters, we shouldn't drop it */ - if (j->matters_to_anchor) - continue; - - /* Would this stop a running service? - * Would this change an existing job? - * If so, let's drop this entry */ - - stops_running_service = - j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit)); - - changes_existing_job = - j->unit->job && - job_type_is_conflicting(j->type, j->unit->job->type); - - if (!stops_running_service && !changes_existing_job) - continue; - - if (stops_running_service) - log_debug("%s/%s would stop a running service.", j->unit->id, job_type_to_string(j->type)); - - if (changes_existing_job) - log_debug("%s/%s would change existing job.", j->unit->id, job_type_to_string(j->type)); - - /* Ok, let's get rid of this */ - log_debug("Deleting %s/%s to minimize impact.", j->unit->id, job_type_to_string(j->type)); - - transaction_delete_job(m, j, true); - again = true; - break; - } - - if (again) - break; - } - - } while (again); -} - -static int transaction_apply(Manager *m, JobMode mode) { - Iterator i; - Job *j; - int r; - - /* Moves the transaction jobs to the set of active jobs */ - - if (mode == JOB_ISOLATE) { - - /* When isolating first kill all installed jobs which - * aren't part of the new transaction */ - rescan: - HASHMAP_FOREACH(j, m->jobs, i) { - assert(j->installed); - - if (hashmap_get(m->transaction_jobs, j->unit)) - continue; - - /* 'j' itself is safe to remove, but if other jobs - are invalidated recursively, our iterator may become - invalid and we need to start over. */ - if (job_finish_and_invalidate(j, JOB_CANCELED) > 0) - goto rescan; - } - } - - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - /* Assume merged */ - assert(!j->transaction_prev); - assert(!j->transaction_next); - - if (j->installed) - continue; - - if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0) - goto rollback; - } - - while ((j = hashmap_steal_first(m->transaction_jobs))) { - if (j->installed) { - /* log_debug("Skipping already installed job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id); */ - continue; - } - - if (j->unit->job) - job_free(j->unit->job); - - j->unit->job = j; - j->installed = true; - m->n_installed_jobs ++; - - /* We're fully installed. Now let's free data we don't - * need anymore. */ - - assert(!j->transaction_next); - assert(!j->transaction_prev); - - job_add_to_run_queue(j); - job_add_to_dbus_queue(j); - job_start_timer(j); - - log_debug("Installed new job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id); - } - - /* As last step, kill all remaining job dependencies. */ - transaction_clean_dependencies(m); - - return 0; - -rollback: - - HASHMAP_FOREACH(j, m->transaction_jobs, i) { - if (j->installed) - continue; - - hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); - } - - return r; -} - -static int transaction_activate(Manager *m, JobMode mode, DBusError *e) { - int r; - unsigned generation = 1; - - assert(m); - - /* This applies the changes recorded in transaction_jobs to - * the actual list of jobs, if possible. */ - - /* First step: figure out which jobs matter */ - transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++); - - /* Second step: Try not to stop any running services if - * we don't have to. Don't try to reverse running - * jobs if we don't have to. */ - if (mode == JOB_FAIL) - transaction_minimize_impact(m); - - /* Third step: Drop redundant jobs */ - transaction_drop_redundant(m); - - for (;;) { - /* Fourth step: Let's remove unneeded jobs that might - * be lurking. */ - if (mode != JOB_ISOLATE) - transaction_collect_garbage(m); - - /* Fifth step: verify order makes sense and correct - * cycles if necessary and possible */ - if ((r = transaction_verify_order(m, &generation, e)) >= 0) - break; - - if (r != -EAGAIN) { - log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r)); - goto rollback; - } - - /* Let's see if the resulting transaction ordering - * graph is still cyclic... */ - } - - for (;;) { - /* Sixth step: let's drop unmergeable entries if - * necessary and possible, merge entries we can - * merge */ - if ((r = transaction_merge_jobs(m, e)) >= 0) - break; - - if (r != -EAGAIN) { - log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r)); - goto rollback; - } - - /* Seventh step: an entry got dropped, let's garbage - * collect its dependencies. */ - if (mode != JOB_ISOLATE) - transaction_collect_garbage(m); - - /* Let's see if the resulting transaction still has - * unmergeable entries ... */ - } - - /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */ - transaction_drop_redundant(m); - - /* Ninth step: check whether we can actually apply this */ - if (mode == JOB_FAIL) - if ((r = transaction_is_destructive(m, e)) < 0) { - log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r)); - goto rollback; - } - - /* Tenth step: apply changes */ - if ((r = transaction_apply(m, mode)) < 0) { - log_warning("Failed to apply transaction: %s", strerror(-r)); - goto rollback; - } - - assert(hashmap_isempty(m->transaction_jobs)); - assert(!m->transaction_anchor); - - return 0; - -rollback: - transaction_abort(m); - return r; -} - -static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) { - Job *j, *f; - - assert(m); - assert(unit); - - /* Looks for an existing prospective job and returns that. If - * it doesn't exist it is created and added to the prospective - * jobs list. */ - - f = hashmap_get(m->transaction_jobs, unit); - - LIST_FOREACH(transaction, j, f) { - assert(j->unit == unit); - - if (j->type == type) { - if (is_new) - *is_new = false; - return j; - } - } - - if (unit->job && unit->job->type == type) - j = unit->job; - else if (!(j = job_new(m, type, unit))) - return NULL; - - j->generation = 0; - j->marker = NULL; - j->matters_to_anchor = false; - j->override = override; - - LIST_PREPEND(Job, transaction, f, j); - - if (hashmap_replace(m->transaction_jobs, unit, f) < 0) { - job_free(j); - return NULL; - } - - if (is_new) - *is_new = true; - - /* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */ - - return j; -} - -void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) { - assert(m); - assert(j); - - if (j->transaction_prev) - j->transaction_prev->transaction_next = j->transaction_next; - else if (j->transaction_next) - hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next); - else - hashmap_remove_value(m->transaction_jobs, j->unit, j); - - if (j->transaction_next) - j->transaction_next->transaction_prev = j->transaction_prev; - - j->transaction_prev = j->transaction_next = NULL; - - while (j->subject_list) - job_dependency_free(j->subject_list); - - while (j->object_list) { - Job *other = j->object_list->matters ? j->object_list->subject : NULL; - - job_dependency_free(j->object_list); - - if (other && delete_dependencies) { - log_debug("Deleting job %s/%s as dependency of job %s/%s", - other->unit->id, job_type_to_string(other->type), - j->unit->id, job_type_to_string(j->type)); - transaction_delete_job(m, other, delete_dependencies); - } - } -} - -static int transaction_add_job_and_dependencies( - Manager *m, - JobType type, - Unit *unit, - Job *by, - bool matters, - bool override, - bool conflicts, - bool ignore_requirements, - bool ignore_order, - DBusError *e, - Job **_ret) { - Job *ret; - Iterator i; - Unit *dep; - int r; - bool is_new; - - assert(m); - assert(type < _JOB_TYPE_MAX); - assert(unit); - - /* log_debug("Pulling in %s/%s from %s/%s", */ - /* unit->id, job_type_to_string(type), */ - /* by ? by->unit->id : "NA", */ - /* by ? job_type_to_string(by->type) : "NA"); */ - - if (unit->load_state != UNIT_LOADED && - unit->load_state != UNIT_ERROR && - unit->load_state != UNIT_MASKED) { - dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id); - return -EINVAL; - } - - if (type != JOB_STOP && unit->load_state == UNIT_ERROR) { - dbus_set_error(e, BUS_ERROR_LOAD_FAILED, - "Unit %s failed to load: %s. " - "See system logs and 'systemctl status %s' for details.", - unit->id, - strerror(-unit->load_error), - unit->id); - return -EINVAL; - } - - if (type != JOB_STOP && unit->load_state == UNIT_MASKED) { - dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->id); - return -EINVAL; - } - - if (!unit_job_is_applicable(unit, type)) { - dbus_set_error(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, "Job type %s is not applicable for unit %s.", job_type_to_string(type), unit->id); - return -EBADR; - } - - /* First add the job. */ - if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new))) - return -ENOMEM; - - ret->ignore_order = ret->ignore_order || ignore_order; - - /* Then, add a link to the job. */ - if (!job_dependency_new(by, ret, matters, conflicts)) - return -ENOMEM; - - if (is_new && !ignore_requirements) { - Set *following; - - /* If we are following some other unit, make sure we - * add all dependencies of everybody following. */ - if (unit_following_set(ret->unit, &following) > 0) { - SET_FOREACH(dep, following, i) - if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); - - if (e) - dbus_error_free(e); - } - - set_free(following); - } - - /* Finally, recursively add in all dependencies. */ - if (type == JOB_START || type == JOB_RELOAD_OR_START) { - SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) { - if (r != -EBADR) - goto fail; - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_BIND_TO], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) { - - if (r != -EBADR) - goto fail; - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, false, false, ignore_order, e, NULL)) < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) { - - if (r != -EBADR) - goto fail; - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTS], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e, NULL)) < 0) { - - if (r != -EBADR) - goto fail; - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) { - log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); - - if (e) - dbus_error_free(e); - } - - } - - if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) { - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRED_BY], i) - if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) { - - if (r != -EBADR) - goto fail; - - if (e) - dbus_error_free(e); - } - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_BOUND_BY], i) - if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) { - - if (r != -EBADR) - goto fail; - - if (e) - dbus_error_free(e); - } - } - - if (type == JOB_RELOAD || type == JOB_RELOAD_OR_START) { - - SET_FOREACH(dep, ret->unit->dependencies[UNIT_PROPAGATE_RELOAD_TO], i) { - r = transaction_add_job_and_dependencies(m, JOB_RELOAD, dep, ret, false, override, false, false, ignore_order, e, NULL); - - if (r < 0) { - log_warning("Cannot add dependency reload job for unit %s, ignoring: %s", dep->id, bus_error(e, r)); - - if (e) - dbus_error_free(e); - } - } - } - - /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */ - } - - if (_ret) - *_ret = ret; - - return 0; - -fail: - return r; -} - -static int transaction_add_isolate_jobs(Manager *m) { - Iterator i; - Unit *u; - char *k; - int r; - - assert(m); - - HASHMAP_FOREACH_KEY(u, k, m->units, i) { - - /* ignore aliases */ - if (u->id != k) - continue; - - if (u->ignore_on_isolate) - continue; - - /* No need to stop inactive jobs */ - if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job) - continue; - - /* Is there already something listed for this? */ - if (hashmap_get(m->transaction_jobs, u)) - continue; - - if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, false, false, false, NULL, NULL)) < 0) - log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->id, strerror(-r)); - } - - return 0; -} - -int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) { - int r; - Job *ret; - - assert(m); - assert(type < _JOB_TYPE_MAX); - assert(unit); - assert(mode < _JOB_MODE_MAX); - - if (mode == JOB_ISOLATE && type != JOB_START) { - dbus_set_error(e, BUS_ERROR_INVALID_JOB_MODE, "Isolate is only valid for start."); - return -EINVAL; - } - - if (mode == JOB_ISOLATE && !unit->allow_isolate) { - dbus_set_error(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated."); - return -EPERM; - } - - log_debug("Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode)); - - if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, false, - mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS, - mode == JOB_IGNORE_DEPENDENCIES, e, &ret)) < 0) { - transaction_abort(m); - return r; - } - - if (mode == JOB_ISOLATE) - if ((r = transaction_add_isolate_jobs(m)) < 0) { - transaction_abort(m); - return r; - } - - if ((r = transaction_activate(m, mode, e)) < 0) - return r; - - log_debug("Enqueued job %s/%s as %u", unit->id, job_type_to_string(type), (unsigned) ret->id); - - if (_ret) - *_ret = ret; - - return 0; -} - -int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) { - Unit *unit; - int r; - - assert(m); - assert(type < _JOB_TYPE_MAX); - assert(name); - assert(mode < _JOB_MODE_MAX); - - if ((r = manager_load_unit(m, name, NULL, NULL, &unit)) < 0) - return r; - - return manager_add_job(m, type, unit, mode, override, e, _ret); -} - -Job *manager_get_job(Manager *m, uint32_t id) { - assert(m); - - return hashmap_get(m->jobs, UINT32_TO_PTR(id)); -} - -Unit *manager_get_unit(Manager *m, const char *name) { - assert(m); - assert(name); - - return hashmap_get(m->units, name); -} - -unsigned manager_dispatch_load_queue(Manager *m) { - Unit *u; - unsigned n = 0; - - assert(m); - - /* Make sure we are not run recursively */ - if (m->dispatching_load_queue) - return 0; - - m->dispatching_load_queue = true; - - /* Dispatches the load queue. Takes a unit from the queue and - * tries to load its data until the queue is empty */ - - while ((u = m->load_queue)) { - assert(u->in_load_queue); - - unit_load(u); - n++; - } - - m->dispatching_load_queue = false; - return n; -} - -int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) { - Unit *ret; - UnitType t; - int r; - - assert(m); - assert(name || path); - - /* This will prepare the unit for loading, but not actually - * load anything from disk. */ - - if (path && !is_path(path)) { - dbus_set_error(e, BUS_ERROR_INVALID_PATH, "Path %s is not absolute.", path); - return -EINVAL; - } - - if (!name) - name = file_name_from_path(path); - - t = unit_name_to_type(name); - - if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid_no_type(name, false)) { - dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name); - return -EINVAL; - } - - ret = manager_get_unit(m, name); - if (ret) { - *_ret = ret; - return 1; - } - - ret = unit_new(m, unit_vtable[t]->object_size); - if (!ret) - return -ENOMEM; - - if (path) { - ret->fragment_path = strdup(path); - if (!ret->fragment_path) { - unit_free(ret); - return -ENOMEM; - } - } - - if ((r = unit_add_name(ret, name)) < 0) { - unit_free(ret); - return r; - } - - unit_add_to_load_queue(ret); - unit_add_to_dbus_queue(ret); - unit_add_to_gc_queue(ret); - - if (_ret) - *_ret = ret; - - return 0; -} - -int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) { - int r; - - assert(m); - - /* This will load the service information files, but not actually - * start any services or anything. */ - - if ((r = manager_load_unit_prepare(m, name, path, e, _ret)) != 0) - return r; - - manager_dispatch_load_queue(m); - - if (_ret) - *_ret = unit_follow_merge(*_ret); - - return 0; -} - -void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) { - Iterator i; - Job *j; - - assert(s); - assert(f); - - HASHMAP_FOREACH(j, s->jobs, i) - job_dump(j, f, prefix); -} - -void manager_dump_units(Manager *s, FILE *f, const char *prefix) { - Iterator i; - Unit *u; - const char *t; - - assert(s); - assert(f); - - HASHMAP_FOREACH_KEY(u, t, s->units, i) - if (u->id == t) - unit_dump(u, f, prefix); -} - -void manager_clear_jobs(Manager *m) { - Job *j; - - assert(m); - - transaction_abort(m); - - while ((j = hashmap_first(m->jobs))) - job_finish_and_invalidate(j, JOB_CANCELED); -} - -unsigned manager_dispatch_run_queue(Manager *m) { - Job *j; - unsigned n = 0; - - if (m->dispatching_run_queue) - return 0; - - m->dispatching_run_queue = true; - - while ((j = m->run_queue)) { - assert(j->installed); - assert(j->in_run_queue); - - job_run_and_invalidate(j); - n++; - } - - m->dispatching_run_queue = false; - return n; -} - -unsigned manager_dispatch_dbus_queue(Manager *m) { - Job *j; - Unit *u; - unsigned n = 0; - - assert(m); - - if (m->dispatching_dbus_queue) - return 0; - - m->dispatching_dbus_queue = true; - - while ((u = m->dbus_unit_queue)) { - assert(u->in_dbus_queue); - - bus_unit_send_change_signal(u); - n++; - } - - while ((j = m->dbus_job_queue)) { - assert(j->in_dbus_queue); - - bus_job_send_change_signal(j); - n++; - } - - m->dispatching_dbus_queue = false; - return n; -} - -static int manager_process_notify_fd(Manager *m) { - ssize_t n; - - assert(m); - - for (;;) { - char buf[4096]; - struct msghdr msghdr; - struct iovec iovec; - struct ucred *ucred; - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; - } control; - Unit *u; - char **tags; - - zero(iovec); - iovec.iov_base = buf; - iovec.iov_len = sizeof(buf)-1; - - zero(control); - zero(msghdr); - msghdr.msg_iov = &iovec; - msghdr.msg_iovlen = 1; - msghdr.msg_control = &control; - msghdr.msg_controllen = sizeof(control); - - if ((n = recvmsg(m->notify_watch.fd, &msghdr, MSG_DONTWAIT)) <= 0) { - if (n >= 0) - return -EIO; - - if (errno == EAGAIN || errno == EINTR) - break; - - return -errno; - } - - if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) || - control.cmsghdr.cmsg_level != SOL_SOCKET || - control.cmsghdr.cmsg_type != SCM_CREDENTIALS || - control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) { - log_warning("Received notify message without credentials. Ignoring."); - continue; - } - - ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr); - - if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(ucred->pid)))) - if (!(u = cgroup_unit_by_pid(m, ucred->pid))) { - log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid); - continue; - } - - assert((size_t) n < sizeof(buf)); - buf[n] = 0; - if (!(tags = strv_split(buf, "\n\r"))) - return -ENOMEM; - - log_debug("Got notification message for unit %s", u->id); - - if (UNIT_VTABLE(u)->notify_message) - UNIT_VTABLE(u)->notify_message(u, ucred->pid, tags); - - strv_free(tags); - } - - return 0; -} - -static int manager_dispatch_sigchld(Manager *m) { - assert(m); - - for (;;) { - siginfo_t si; - Unit *u; - int r; - - zero(si); - - /* First we call waitd() for a PID and do not reap the - * zombie. That way we can still access /proc/$PID for - * it while it is a zombie. */ - if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) { - - if (errno == ECHILD) - break; - - if (errno == EINTR) - continue; - - return -errno; - } - - if (si.si_pid <= 0) - break; - - if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) { - char *name = NULL; - - get_process_comm(si.si_pid, &name); - log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name)); - free(name); - } - - /* Let's flush any message the dying child might still - * have queued for us. This ensures that the process - * still exists in /proc so that we can figure out - * which cgroup and hence unit it belongs to. */ - if ((r = manager_process_notify_fd(m)) < 0) - return r; - - /* And now figure out the unit this belongs to */ - if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid)))) - u = cgroup_unit_by_pid(m, si.si_pid); - - /* And now, we actually reap the zombie. */ - if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) { - if (errno == EINTR) - continue; - - return -errno; - } - - if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED) - continue; - - log_debug("Child %lu died (code=%s, status=%i/%s)", - (long unsigned) si.si_pid, - sigchld_code_to_string(si.si_code), - si.si_status, - strna(si.si_code == CLD_EXITED - ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL) - : signal_to_string(si.si_status))); - - if (!u) - continue; - - log_debug("Child %lu belongs to %s", (long unsigned) si.si_pid, u->id); - - hashmap_remove(m->watch_pids, LONG_TO_PTR(si.si_pid)); - UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status); - } - - return 0; -} - -static int manager_start_target(Manager *m, const char *name, JobMode mode) { - int r; - DBusError error; - - dbus_error_init(&error); - - log_debug("Activating special unit %s", name); - - if ((r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL)) < 0) - log_error("Failed to enqueue %s job: %s", name, bus_error(&error, r)); - - dbus_error_free(&error); - - return r; -} - -static int manager_process_signal_fd(Manager *m) { - ssize_t n; - struct signalfd_siginfo sfsi; - bool sigchld = false; - - assert(m); - - for (;;) { - if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) { - - if (n >= 0) - return -EIO; - - if (errno == EINTR || errno == EAGAIN) - break; - - return -errno; - } - - if (sfsi.ssi_pid > 0) { - char *p = NULL; - - get_process_comm(sfsi.ssi_pid, &p); - - log_debug("Received SIG%s from PID %lu (%s).", - signal_to_string(sfsi.ssi_signo), - (unsigned long) sfsi.ssi_pid, strna(p)); - free(p); - } else - log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo)); - - switch (sfsi.ssi_signo) { - - case SIGCHLD: - sigchld = true; - break; - - case SIGTERM: - if (m->running_as == MANAGER_SYSTEM) { - /* This is for compatibility with the - * original sysvinit */ - m->exit_code = MANAGER_REEXECUTE; - break; - } - - /* Fall through */ - - case SIGINT: - if (m->running_as == MANAGER_SYSTEM) { - manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE); - break; - } - - /* Run the exit target if there is one, if not, just exit. */ - if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) { - m->exit_code = MANAGER_EXIT; - return 0; - } - - break; - - case SIGWINCH: - if (m->running_as == MANAGER_SYSTEM) - manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE); - - /* This is a nop on non-init */ - break; - - case SIGPWR: - if (m->running_as == MANAGER_SYSTEM) - manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE); - - /* This is a nop on non-init */ - break; - - case SIGUSR1: { - Unit *u; - - u = manager_get_unit(m, SPECIAL_DBUS_SERVICE); - - if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) { - log_info("Trying to reconnect to bus..."); - bus_init(m, true); - } - - if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) { - log_info("Loading D-Bus service..."); - manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE); - } - - break; - } - - case SIGUSR2: { - FILE *f; - char *dump = NULL; - size_t size; - - if (!(f = open_memstream(&dump, &size))) { - log_warning("Failed to allocate memory stream."); - break; - } - - manager_dump_units(m, f, "\t"); - manager_dump_jobs(m, f, "\t"); - - if (ferror(f)) { - fclose(f); - free(dump); - log_warning("Failed to write status stream"); - break; - } - - fclose(f); - log_dump(LOG_INFO, dump); - free(dump); - - break; - } - - case SIGHUP: - m->exit_code = MANAGER_RELOAD; - break; - - default: { - - /* Starting SIGRTMIN+0 */ - static const char * const target_table[] = { - [0] = SPECIAL_DEFAULT_TARGET, - [1] = SPECIAL_RESCUE_TARGET, - [2] = SPECIAL_EMERGENCY_TARGET, - [3] = SPECIAL_HALT_TARGET, - [4] = SPECIAL_POWEROFF_TARGET, - [5] = SPECIAL_REBOOT_TARGET, - [6] = SPECIAL_KEXEC_TARGET - }; - - /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */ - static const ManagerExitCode code_table[] = { - [0] = MANAGER_HALT, - [1] = MANAGER_POWEROFF, - [2] = MANAGER_REBOOT, - [3] = MANAGER_KEXEC - }; - - if ((int) sfsi.ssi_signo >= SIGRTMIN+0 && - (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) { - int idx = (int) sfsi.ssi_signo - SIGRTMIN; - manager_start_target(m, target_table[idx], - (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE); - break; - } - - if ((int) sfsi.ssi_signo >= SIGRTMIN+13 && - (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) { - m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13]; - break; - } - - switch (sfsi.ssi_signo - SIGRTMIN) { - - case 20: - log_debug("Enabling showing of status."); - manager_set_show_status(m, true); - break; - - case 21: - log_debug("Disabling showing of status."); - manager_set_show_status(m, false); - break; - - case 22: - log_set_max_level(LOG_DEBUG); - log_notice("Setting log level to debug."); - break; - - case 23: - log_set_max_level(LOG_INFO); - log_notice("Setting log level to info."); - break; - - case 26: - log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); - log_notice("Setting log target to journal-or-kmsg."); - break; - - case 27: - log_set_target(LOG_TARGET_CONSOLE); - log_notice("Setting log target to console."); - break; - - case 28: - log_set_target(LOG_TARGET_KMSG); - log_notice("Setting log target to kmsg."); - break; - - case 29: - log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); - log_notice("Setting log target to syslog-or-kmsg."); - break; - - default: - log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo)); - } - } - } - } - - if (sigchld) - return manager_dispatch_sigchld(m); - - return 0; -} - -static int process_event(Manager *m, struct epoll_event *ev) { - int r; - Watch *w; - - assert(m); - assert(ev); - - assert_se(w = ev->data.ptr); - - if (w->type == WATCH_INVALID) - return 0; - - switch (w->type) { - - case WATCH_SIGNAL: - - /* An incoming signal? */ - if (ev->events != EPOLLIN) - return -EINVAL; - - if ((r = manager_process_signal_fd(m)) < 0) - return r; - - break; - - case WATCH_NOTIFY: - - /* An incoming daemon notification event? */ - if (ev->events != EPOLLIN) - return -EINVAL; - - if ((r = manager_process_notify_fd(m)) < 0) - return r; - - break; - - case WATCH_FD: - - /* Some fd event, to be dispatched to the units */ - UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w); - break; - - case WATCH_UNIT_TIMER: - case WATCH_JOB_TIMER: { - uint64_t v; - ssize_t k; - - /* Some timer event, to be dispatched to the units */ - if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) { - - if (k < 0 && (errno == EINTR || errno == EAGAIN)) - break; - - return k < 0 ? -errno : -EIO; - } - - if (w->type == WATCH_UNIT_TIMER) - UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w); - else - job_timer_event(w->data.job, v, w); - break; - } - - case WATCH_MOUNT: - /* Some mount table change, intended for the mount subsystem */ - mount_fd_event(m, ev->events); - break; - - case WATCH_SWAP: - /* Some swap table change, intended for the swap subsystem */ - swap_fd_event(m, ev->events); - break; - - case WATCH_UDEV: - /* Some notification from udev, intended for the device subsystem */ - device_fd_event(m, ev->events); - break; - - case WATCH_DBUS_WATCH: - bus_watch_event(m, w, ev->events); - break; - - case WATCH_DBUS_TIMEOUT: - bus_timeout_event(m, w, ev->events); - break; - - default: - log_error("event type=%i", w->type); - assert_not_reached("Unknown epoll event type."); - } - - return 0; -} - -int manager_loop(Manager *m) { - int r; - int wait_msec = -1; - - RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000); - - assert(m); - m->exit_code = MANAGER_RUNNING; - - /* Release the path cache */ - set_free_free(m->unit_path_cache); - m->unit_path_cache = NULL; - - manager_check_finished(m); - - /* There might still be some zombies hanging around from - * before we were exec()'ed. Leat's reap them */ - r = manager_dispatch_sigchld(m); - if (r < 0) - return r; - - /* Sleep for half the watchdog time */ - if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM) { - wait_msec = (int) (m->runtime_watchdog / 2 / USEC_PER_MSEC); - if (wait_msec <= 0) - wait_msec = 1; - } - - while (m->exit_code == MANAGER_RUNNING) { - struct epoll_event event; - int n; - - if (wait_msec >= 0) - watchdog_ping(); - - if (!ratelimit_test(&rl)) { - /* Yay, something is going seriously wrong, pause a little */ - log_warning("Looping too fast. Throttling execution a little."); - sleep(1); - continue; - } - - if (manager_dispatch_load_queue(m) > 0) - continue; - - if (manager_dispatch_run_queue(m) > 0) - continue; - - if (bus_dispatch(m) > 0) - continue; - - if (manager_dispatch_cleanup_queue(m) > 0) - continue; - - if (manager_dispatch_gc_queue(m) > 0) - continue; - - if (manager_dispatch_dbus_queue(m) > 0) - continue; - - if (swap_dispatch_reload(m) > 0) - continue; - - n = epoll_wait(m->epoll_fd, &event, 1, wait_msec); - if (n < 0) { - - if (errno == EINTR) - continue; - - return -errno; - } else if (n == 0) - continue; - - assert(n == 1); - - r = process_event(m, &event); - if (r < 0) - return r; - } - - return m->exit_code; -} - -int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) { - char *n; - Unit *u; - - assert(m); - assert(s); - assert(_u); - - if (!startswith(s, "/org/freedesktop/systemd1/unit/")) - return -EINVAL; - - if (!(n = bus_path_unescape(s+31))) - return -ENOMEM; - - u = manager_get_unit(m, n); - free(n); - - if (!u) - return -ENOENT; - - *_u = u; - - return 0; -} - -int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) { - Job *j; - unsigned id; - int r; - - assert(m); - assert(s); - assert(_j); - - if (!startswith(s, "/org/freedesktop/systemd1/job/")) - return -EINVAL; - - if ((r = safe_atou(s + 30, &id)) < 0) - return r; - - if (!(j = manager_get_job(m, id))) - return -ENOENT; - - *_j = j; - - return 0; -} - -void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) { - -#ifdef HAVE_AUDIT - char *p; - - if (m->audit_fd < 0) - return; - - /* Don't generate audit events if the service was already - * started and we're just deserializing */ - if (m->n_reloading > 0) - return; - - if (m->running_as != MANAGER_SYSTEM) - return; - - if (u->type != UNIT_SERVICE) - return; - - if (!(p = unit_name_to_prefix_and_instance(u->id))) { - log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM)); - return; - } - - if (audit_log_user_comm_message(m->audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) { - log_warning("Failed to send audit message: %m"); - - if (errno == EPERM) { - /* We aren't allowed to send audit messages? - * Then let's not retry again, to avoid - * spamming the user with the same and same - * messages over and over. */ - - audit_close(m->audit_fd); - m->audit_fd = -1; - } - } - - free(p); -#endif - -} - -void manager_send_unit_plymouth(Manager *m, Unit *u) { - int fd = -1; - union sockaddr_union sa; - int n = 0; - char *message = NULL; - - /* Don't generate plymouth events if the service was already - * started and we're just deserializing */ - if (m->n_reloading > 0) - return; - - if (m->running_as != MANAGER_SYSTEM) - return; - - if (u->type != UNIT_SERVICE && - u->type != UNIT_MOUNT && - u->type != UNIT_SWAP) - return; - - /* We set SOCK_NONBLOCK here so that we rather drop the - * message then wait for plymouth */ - if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) { - log_error("socket() failed: %m"); - return; - } - - zero(sa); - sa.sa.sa_family = AF_UNIX; - strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1); - if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) { - - if (errno != EPIPE && - errno != EAGAIN && - errno != ENOENT && - errno != ECONNREFUSED && - errno != ECONNRESET && - errno != ECONNABORTED) - log_error("connect() failed: %m"); - - goto finish; - } - - if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) { - log_error("Out of memory"); - goto finish; - } - - errno = 0; - if (write(fd, message, n + 1) != n + 1) { - - if (errno != EPIPE && - errno != EAGAIN && - errno != ENOENT && - errno != ECONNREFUSED && - errno != ECONNRESET && - errno != ECONNABORTED) - log_error("Failed to write Plymouth message: %m"); - - goto finish; - } - -finish: - if (fd >= 0) - close_nointr_nofail(fd); - - free(message); -} - -void manager_dispatch_bus_name_owner_changed( - Manager *m, - const char *name, - const char* old_owner, - const char *new_owner) { - - Unit *u; - - assert(m); - assert(name); - - if (!(u = hashmap_get(m->watch_bus, name))) - return; - - UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); -} - -void manager_dispatch_bus_query_pid_done( - Manager *m, - const char *name, - pid_t pid) { - - Unit *u; - - assert(m); - assert(name); - assert(pid >= 1); - - if (!(u = hashmap_get(m->watch_bus, name))) - return; - - UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid); -} - -int manager_open_serialization(Manager *m, FILE **_f) { - char *path = NULL; - mode_t saved_umask; - int fd; - FILE *f; - - assert(_f); - - if (m->running_as == MANAGER_SYSTEM) - asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid()); - else - asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid()); - - if (!path) - return -ENOMEM; - - saved_umask = umask(0077); - fd = mkostemp(path, O_RDWR|O_CLOEXEC); - umask(saved_umask); - - if (fd < 0) { - free(path); - return -errno; - } - - unlink(path); - - log_debug("Serializing state to %s", path); - free(path); - - if (!(f = fdopen(fd, "w+"))) - return -errno; - - *_f = f; - - return 0; -} - -int manager_serialize(Manager *m, FILE *f, FDSet *fds) { - Iterator i; - Unit *u; - const char *t; - int r; - - assert(m); - assert(f); - assert(fds); - - m->n_reloading ++; - - fprintf(f, "current-job-id=%i\n", m->current_job_id); - fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr)); - - dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp); - dual_timestamp_serialize(f, "startup-timestamp", &m->startup_timestamp); - dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp); - - fputc('\n', f); - - HASHMAP_FOREACH_KEY(u, t, m->units, i) { - if (u->id != t) - continue; - - if (!unit_can_serialize(u)) - continue; - - /* Start marker */ - fputs(u->id, f); - fputc('\n', f); - - if ((r = unit_serialize(u, f, fds)) < 0) { - m->n_reloading --; - return r; - } - } - - assert(m->n_reloading > 0); - m->n_reloading --; - - if (ferror(f)) - return -EIO; - - r = bus_fdset_add_all(m, fds); - if (r < 0) - return r; - - return 0; -} - -int manager_deserialize(Manager *m, FILE *f, FDSet *fds) { - int r = 0; - - assert(m); - assert(f); - - log_debug("Deserializing state..."); - - m->n_reloading ++; - - for (;;) { - char line[LINE_MAX], *l; - - if (!fgets(line, sizeof(line), f)) { - if (feof(f)) - r = 0; - else - r = -errno; - - goto finish; - } - - char_array_0(line); - l = strstrip(line); - - if (l[0] == 0) - break; - - if (startswith(l, "current-job-id=")) { - uint32_t id; - - if (safe_atou32(l+15, &id) < 0) - log_debug("Failed to parse current job id value %s", l+15); - else - m->current_job_id = MAX(m->current_job_id, id); - } else if (startswith(l, "taint-usr=")) { - int b; - - if ((b = parse_boolean(l+10)) < 0) - log_debug("Failed to parse taint /usr flag %s", l+10); - else - m->taint_usr = m->taint_usr || b; - } else if (startswith(l, "initrd-timestamp=")) - dual_timestamp_deserialize(l+17, &m->initrd_timestamp); - else if (startswith(l, "startup-timestamp=")) - dual_timestamp_deserialize(l+18, &m->startup_timestamp); - else if (startswith(l, "finish-timestamp=")) - dual_timestamp_deserialize(l+17, &m->finish_timestamp); - else - log_debug("Unknown serialization item '%s'", l); - } - - for (;;) { - Unit *u; - char name[UNIT_NAME_MAX+2]; - - /* Start marker */ - if (!fgets(name, sizeof(name), f)) { - if (feof(f)) - r = 0; - else - r = -errno; - - goto finish; - } - - char_array_0(name); - - if ((r = manager_load_unit(m, strstrip(name), NULL, NULL, &u)) < 0) - goto finish; - - if ((r = unit_deserialize(u, f, fds)) < 0) - goto finish; - } - -finish: - if (ferror(f)) { - r = -EIO; - goto finish; - } - - assert(m->n_reloading > 0); - m->n_reloading --; - - return r; -} - -int manager_reload(Manager *m) { - int r, q; - FILE *f; - FDSet *fds; - - assert(m); - - if ((r = manager_open_serialization(m, &f)) < 0) - return r; - - m->n_reloading ++; - - if (!(fds = fdset_new())) { - m->n_reloading --; - r = -ENOMEM; - goto finish; - } - - if ((r = manager_serialize(m, f, fds)) < 0) { - m->n_reloading --; - goto finish; - } - - if (fseeko(f, 0, SEEK_SET) < 0) { - m->n_reloading --; - r = -errno; - goto finish; - } - - /* From here on there is no way back. */ - manager_clear_jobs_and_units(m); - manager_undo_generators(m); - - /* Find new unit paths */ - lookup_paths_free(&m->lookup_paths); - if ((q = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0) - r = q; - - manager_run_generators(m); - - manager_build_unit_path_cache(m); - - /* First, enumerate what we can from all config files */ - if ((q = manager_enumerate(m)) < 0) - r = q; - - /* Second, deserialize our stored data */ - if ((q = manager_deserialize(m, f, fds)) < 0) - r = q; - - fclose(f); - f = NULL; - - /* Third, fire things up! */ - if ((q = manager_coldplug(m)) < 0) - r = q; - - assert(m->n_reloading > 0); - m->n_reloading--; - -finish: - if (f) - fclose(f); - - if (fds) - fdset_free(fds); - - return r; -} - -bool manager_is_booting_or_shutting_down(Manager *m) { - Unit *u; - - assert(m); - - /* Is the initial job still around? */ - if (manager_get_job(m, m->default_unit_job_id)) - return true; - - /* Is there a job for the shutdown target? */ - u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET); - if (u) - return !!u->job; - - return false; -} - -void manager_reset_failed(Manager *m) { - Unit *u; - Iterator i; - - assert(m); - - HASHMAP_FOREACH(u, m->units, i) - unit_reset_failed(u); -} - -bool manager_unit_pending_inactive(Manager *m, const char *name) { - Unit *u; - - assert(m); - assert(name); - - /* Returns true if the unit is inactive or going down */ - if (!(u = manager_get_unit(m, name))) - return true; - - return unit_pending_inactive(u); -} - -void manager_check_finished(Manager *m) { - char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX]; - usec_t kernel_usec = 0, initrd_usec = 0, userspace_usec = 0, total_usec = 0; - - assert(m); - - if (dual_timestamp_is_set(&m->finish_timestamp)) - return; - - if (hashmap_size(m->jobs) > 0) - return; - - dual_timestamp_get(&m->finish_timestamp); - - if (m->running_as == MANAGER_SYSTEM && detect_container(NULL) <= 0) { - - userspace_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic; - total_usec = m->finish_timestamp.monotonic; - - if (dual_timestamp_is_set(&m->initrd_timestamp)) { - - kernel_usec = m->initrd_timestamp.monotonic; - initrd_usec = m->startup_timestamp.monotonic - m->initrd_timestamp.monotonic; - - log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.", - format_timespan(kernel, sizeof(kernel), kernel_usec), - format_timespan(initrd, sizeof(initrd), initrd_usec), - format_timespan(userspace, sizeof(userspace), userspace_usec), - format_timespan(sum, sizeof(sum), total_usec)); - } else { - kernel_usec = m->startup_timestamp.monotonic; - initrd_usec = 0; - - log_info("Startup finished in %s (kernel) + %s (userspace) = %s.", - format_timespan(kernel, sizeof(kernel), kernel_usec), - format_timespan(userspace, sizeof(userspace), userspace_usec), - format_timespan(sum, sizeof(sum), total_usec)); - } - } else { - userspace_usec = initrd_usec = kernel_usec = 0; - total_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic; - - log_debug("Startup finished in %s.", - format_timespan(sum, sizeof(sum), total_usec)); - } - - bus_broadcast_finished(m, kernel_usec, initrd_usec, userspace_usec, total_usec); - - sd_notifyf(false, - "READY=1\nSTATUS=Startup finished in %s.", - format_timespan(sum, sizeof(sum), total_usec)); -} - -void manager_run_generators(Manager *m) { - DIR *d = NULL; - const char *generator_path; - const char *argv[3]; - mode_t u; - - assert(m); - - generator_path = m->running_as == MANAGER_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH; - if (!(d = opendir(generator_path))) { - - if (errno == ENOENT) - return; - - log_error("Failed to enumerate generator directory: %m"); - return; - } - - if (!m->generator_unit_path) { - const char *p; - char user_path[] = "/tmp/systemd-generator-XXXXXX"; - - if (m->running_as == MANAGER_SYSTEM && getpid() == 1) { - p = "/run/systemd/generator"; - - if (mkdir_p(p, 0755) < 0) { - log_error("Failed to create generator directory: %m"); - goto finish; - } - - } else { - if (!(p = mkdtemp(user_path))) { - log_error("Failed to create generator directory: %m"); - goto finish; - } - } - - if (!(m->generator_unit_path = strdup(p))) { - log_error("Failed to allocate generator unit path."); - goto finish; - } - } - - argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */ - argv[1] = m->generator_unit_path; - argv[2] = NULL; - - u = umask(0022); - execute_directory(generator_path, d, (char**) argv); - umask(u); - - if (rmdir(m->generator_unit_path) >= 0) { - /* Uh? we were able to remove this dir? I guess that - * means the directory was empty, hence let's shortcut - * this */ - - free(m->generator_unit_path); - m->generator_unit_path = NULL; - goto finish; - } - - if (!strv_find(m->lookup_paths.unit_path, m->generator_unit_path)) { - char **l; - - if (!(l = strv_append(m->lookup_paths.unit_path, m->generator_unit_path))) { - log_error("Failed to add generator directory to unit search path: %m"); - goto finish; - } - - strv_free(m->lookup_paths.unit_path); - m->lookup_paths.unit_path = l; - - log_debug("Added generator unit path %s to search path.", m->generator_unit_path); - } - -finish: - if (d) - closedir(d); -} - -void manager_undo_generators(Manager *m) { - assert(m); - - if (!m->generator_unit_path) - return; - - strv_remove(m->lookup_paths.unit_path, m->generator_unit_path); - rm_rf(m->generator_unit_path, false, true, false); - - free(m->generator_unit_path); - m->generator_unit_path = NULL; -} - -int manager_set_default_controllers(Manager *m, char **controllers) { - char **l; - - assert(m); - - if (!(l = strv_copy(controllers))) - return -ENOMEM; - - strv_free(m->default_controllers); - m->default_controllers = l; - - return 0; -} - -void manager_recheck_journal(Manager *m) { - Unit *u; - - assert(m); - - if (m->running_as != MANAGER_SYSTEM) - return; - - u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET); - if (u && SOCKET(u)->state != SOCKET_RUNNING) { - log_close_journal(); - return; - } - - u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE); - if (u && SERVICE(u)->state != SERVICE_RUNNING) { - log_close_journal(); - return; - } - - /* Hmm, OK, so the socket is fully up and the service is up - * too, then let's make use of the thing. */ - log_open(); -} - -void manager_set_show_status(Manager *m, bool b) { - assert(m); - - if (m->running_as != MANAGER_SYSTEM) - return; - - m->show_status = b; - - if (b) - touch("/run/systemd/show-status"); - else - unlink("/run/systemd/show-status"); -} - -bool manager_get_show_status(Manager *m) { - assert(m); - - if (m->running_as != MANAGER_SYSTEM) - return false; - - if (m->show_status) - return true; - - /* If Plymouth is running make sure we show the status, so - * that there's something nice to see when people press Esc */ - - return plymouth_running(); -} - -static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = { - [MANAGER_SYSTEM] = "system", - [MANAGER_USER] = "user" -}; - -DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs); |