diff options
Diffstat (limited to 'src/core/busname.c')
| -rw-r--r-- | src/core/busname.c | 1081 |
1 files changed, 0 insertions, 1081 deletions
diff --git a/src/core/busname.c b/src/core/busname.c deleted file mode 100644 index b96ec09e67..0000000000 --- a/src/core/busname.c +++ /dev/null @@ -1,1081 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2013 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <sys/mman.h> - -#include "alloc-util.h" -#include "bus-internal.h" -#include "bus-kernel.h" -#include "bus-policy.h" -#include "bus-util.h" -#include "busname.h" -#include "dbus-busname.h" -#include "fd-util.h" -#include "formats-util.h" -#include "kdbus.h" -#include "parse-util.h" -#include "process-util.h" -#include "service.h" -#include "signal-util.h" -#include "special.h" -#include "string-table.h" -#include "string-util.h" - -static const UnitActiveState state_translation_table[_BUSNAME_STATE_MAX] = { - [BUSNAME_DEAD] = UNIT_INACTIVE, - [BUSNAME_MAKING] = UNIT_ACTIVATING, - [BUSNAME_REGISTERED] = UNIT_ACTIVE, - [BUSNAME_LISTENING] = UNIT_ACTIVE, - [BUSNAME_RUNNING] = UNIT_ACTIVE, - [BUSNAME_SIGTERM] = UNIT_DEACTIVATING, - [BUSNAME_SIGKILL] = UNIT_DEACTIVATING, - [BUSNAME_FAILED] = UNIT_FAILED -}; - -static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); -static int busname_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); - -static void busname_init(Unit *u) { - BusName *n = BUSNAME(u); - - assert(u); - assert(u->load_state == UNIT_STUB); - - n->starter_fd = -1; - n->accept_fd = true; - n->activating = true; - - n->timeout_usec = u->manager->default_timeout_start_usec; -} - -static void busname_unwatch_control_pid(BusName *n) { - assert(n); - - if (n->control_pid <= 0) - return; - - unit_unwatch_pid(UNIT(n), n->control_pid); - n->control_pid = 0; -} - -static void busname_free_policy(BusName *n) { - BusNamePolicy *p; - - assert(n); - - while ((p = n->policy)) { - LIST_REMOVE(policy, n->policy, p); - - free(p->name); - free(p); - } -} - -static void busname_close_fd(BusName *n) { - assert(n); - - n->starter_event_source = sd_event_source_unref(n->starter_event_source); - n->starter_fd = safe_close(n->starter_fd); -} - -static void busname_done(Unit *u) { - BusName *n = BUSNAME(u); - - assert(n); - - n->name = mfree(n->name); - - busname_free_policy(n); - busname_unwatch_control_pid(n); - busname_close_fd(n); - - unit_ref_unset(&n->service); - - n->timer_event_source = sd_event_source_unref(n->timer_event_source); -} - -static int busname_arm_timer(BusName *n, usec_t usec) { - int r; - - assert(n); - - if (n->timer_event_source) { - r = sd_event_source_set_time(n->timer_event_source, usec); - if (r < 0) - return r; - - return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT); - } - - if (usec == USEC_INFINITY) - return 0; - - r = sd_event_add_time( - UNIT(n)->manager->event, - &n->timer_event_source, - CLOCK_MONOTONIC, - usec, 0, - busname_dispatch_timer, n); - if (r < 0) - return r; - - (void) sd_event_source_set_description(n->timer_event_source, "busname-timer"); - - return 0; -} - -static int busname_add_default_default_dependencies(BusName *n) { - int r; - - assert(n); - - r = unit_add_dependency_by_name(UNIT(n), UNIT_BEFORE, SPECIAL_BUSNAMES_TARGET, NULL, true); - if (r < 0) - return r; - - if (MANAGER_IS_SYSTEM(UNIT(n)->manager)) { - r = unit_add_two_dependencies_by_name(UNIT(n), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); - if (r < 0) - return r; - } - - return unit_add_two_dependencies_by_name(UNIT(n), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); -} - -static int busname_add_extras(BusName *n) { - Unit *u = UNIT(n); - int r; - - assert(n); - - if (!n->name) { - r = unit_name_to_prefix(u->id, &n->name); - if (r < 0) - return r; - } - - if (!u->description) { - r = unit_set_description(u, n->name); - if (r < 0) - return r; - } - - if (n->activating) { - if (!UNIT_DEREF(n->service)) { - Unit *x; - - r = unit_load_related_unit(u, ".service", &x); - if (r < 0) - return r; - - unit_ref_set(&n->service, x); - } - - r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(n->service), true); - if (r < 0) - return r; - } - - if (u->default_dependencies) { - r = busname_add_default_default_dependencies(n); - if (r < 0) - return r; - } - - return 0; -} - -static int busname_verify(BusName *n) { - char *e; - - assert(n); - - if (UNIT(n)->load_state != UNIT_LOADED) - return 0; - - if (!service_name_is_valid(n->name)) { - log_unit_error(UNIT(n), "Name= setting is not a valid service name Refusing."); - return -EINVAL; - } - - e = strjoina(n->name, ".busname"); - if (!unit_has_name(UNIT(n), e)) { - log_unit_error(UNIT(n), "Name= setting doesn't match unit name. Refusing."); - return -EINVAL; - } - - return 0; -} - -static int busname_load(Unit *u) { - BusName *n = BUSNAME(u); - int r; - - assert(u); - assert(u->load_state == UNIT_STUB); - - r = unit_load_fragment_and_dropin(u); - if (r < 0) - return r; - - if (u->load_state == UNIT_LOADED) { - /* This is a new unit? Then let's add in some extras */ - r = busname_add_extras(n); - if (r < 0) - return r; - } - - return busname_verify(n); -} - -static void busname_dump(Unit *u, FILE *f, const char *prefix) { - BusName *n = BUSNAME(u); - - assert(n); - assert(f); - - fprintf(f, - "%sBus Name State: %s\n" - "%sResult: %s\n" - "%sName: %s\n" - "%sActivating: %s\n" - "%sAccept FD: %s\n", - prefix, busname_state_to_string(n->state), - prefix, busname_result_to_string(n->result), - prefix, n->name, - prefix, yes_no(n->activating), - prefix, yes_no(n->accept_fd)); - - if (n->control_pid > 0) - fprintf(f, - "%sControl PID: "PID_FMT"\n", - prefix, n->control_pid); -} - -static void busname_unwatch_fd(BusName *n) { - int r; - - assert(n); - - if (!n->starter_event_source) - return; - - r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_OFF); - if (r < 0) - log_unit_debug_errno(UNIT(n), r, "Failed to disable event source: %m"); -} - -static int busname_watch_fd(BusName *n) { - int r; - - assert(n); - - if (n->starter_fd < 0) - return 0; - - if (n->starter_event_source) { - r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_ON); - if (r < 0) - goto fail; - } else { - r = sd_event_add_io(UNIT(n)->manager->event, &n->starter_event_source, n->starter_fd, EPOLLIN, busname_dispatch_io, n); - if (r < 0) - goto fail; - - (void) sd_event_source_set_description(n->starter_event_source, "busname-starter"); - } - - return 0; - -fail: - log_unit_warning_errno(UNIT(n), r, "Failed to watch starter fd: %m"); - busname_unwatch_fd(n); - return r; -} - -static int busname_open_fd(BusName *n) { - _cleanup_free_ char *path = NULL; - const char *mode; - - assert(n); - - if (n->starter_fd >= 0) - return 0; - - mode = MANAGER_IS_SYSTEM(UNIT(n)->manager) ? "system" : "user"; - n->starter_fd = bus_kernel_open_bus_fd(mode, &path); - if (n->starter_fd < 0) - return log_unit_warning_errno(UNIT(n), n->starter_fd, "Failed to open %s: %m", path ?: "kdbus"); - - return 0; -} - -static void busname_set_state(BusName *n, BusNameState state) { - BusNameState old_state; - assert(n); - - old_state = n->state; - n->state = state; - - if (!IN_SET(state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) { - n->timer_event_source = sd_event_source_unref(n->timer_event_source); - busname_unwatch_control_pid(n); - } - - if (state != BUSNAME_LISTENING) - busname_unwatch_fd(n); - - if (!IN_SET(state, BUSNAME_LISTENING, BUSNAME_MAKING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) - busname_close_fd(n); - - if (state != old_state) - log_unit_debug(UNIT(n), "Changed %s -> %s", busname_state_to_string(old_state), busname_state_to_string(state)); - - unit_notify(UNIT(n), state_translation_table[old_state], state_translation_table[state], true); -} - -static int busname_coldplug(Unit *u) { - BusName *n = BUSNAME(u); - int r; - - assert(n); - assert(n->state == BUSNAME_DEAD); - - if (n->deserialized_state == n->state) - return 0; - - if (n->control_pid > 0 && - pid_is_unwaited(n->control_pid) && - IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) { - - r = unit_watch_pid(UNIT(n), n->control_pid); - if (r < 0) - return r; - - r = busname_arm_timer(n, usec_add(u->state_change_timestamp.monotonic, n->timeout_usec)); - if (r < 0) - return r; - } - - if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) { - r = busname_open_fd(n); - if (r < 0) - return r; - } - - if (n->deserialized_state == BUSNAME_LISTENING) { - r = busname_watch_fd(n); - if (r < 0) - return r; - } - - busname_set_state(n, n->deserialized_state); - return 0; -} - -static int busname_make_starter(BusName *n, pid_t *_pid) { - pid_t pid; - int r; - - r = busname_arm_timer(n, usec_add(now(CLOCK_MONOTONIC), n->timeout_usec)); - if (r < 0) - goto fail; - - /* We have to resolve the user/group names out-of-process, - * hence let's fork here. It's messy, but well, what can we - * do? */ - - pid = fork(); - if (pid < 0) - return -errno; - - if (pid == 0) { - int ret; - - (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); - (void) ignore_signals(SIGPIPE, -1); - log_forget_fds(); - - r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, n->policy, n->policy_world); - if (r < 0) { - ret = EXIT_MAKE_STARTER; - goto fail_child; - } - - _exit(0); - - fail_child: - log_open(); - log_error_errno(r, "Failed to create starter connection at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD)); - - _exit(ret); - } - - r = unit_watch_pid(UNIT(n), pid); - if (r < 0) - goto fail; - - *_pid = pid; - return 0; - -fail: - n->timer_event_source = sd_event_source_unref(n->timer_event_source); - return r; -} - -static void busname_enter_dead(BusName *n, BusNameResult f) { - assert(n); - - if (n->result == BUSNAME_SUCCESS) - n->result = f; - - busname_set_state(n, n->result != BUSNAME_SUCCESS ? BUSNAME_FAILED : BUSNAME_DEAD); -} - -static void busname_enter_signal(BusName *n, BusNameState state, BusNameResult f) { - KillContext kill_context = {}; - int r; - - assert(n); - - if (n->result == BUSNAME_SUCCESS) - n->result = f; - - kill_context_init(&kill_context); - - r = unit_kill_context(UNIT(n), - &kill_context, - state != BUSNAME_SIGTERM ? KILL_KILL : KILL_TERMINATE, - -1, - n->control_pid, - false); - if (r < 0) { - log_unit_warning_errno(UNIT(n), r, "Failed to kill control process: %m"); - goto fail; - } - - if (r > 0) { - r = busname_arm_timer(n, usec_add(now(CLOCK_MONOTONIC), n->timeout_usec)); - if (r < 0) { - log_unit_warning_errno(UNIT(n), r, "Failed to arm timer: %m"); - goto fail; - } - - busname_set_state(n, state); - } else if (state == BUSNAME_SIGTERM) - busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_SUCCESS); - else - busname_enter_dead(n, BUSNAME_SUCCESS); - - return; - -fail: - busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); -} - -static void busname_enter_listening(BusName *n) { - int r; - - assert(n); - - if (n->activating) { - r = busname_watch_fd(n); - if (r < 0) { - log_unit_warning_errno(UNIT(n), r, "Failed to watch names: %m"); - goto fail; - } - - busname_set_state(n, BUSNAME_LISTENING); - } else - busname_set_state(n, BUSNAME_REGISTERED); - - return; - -fail: - busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_RESOURCES); -} - -static void busname_enter_making(BusName *n) { - int r; - - assert(n); - - r = busname_open_fd(n); - if (r < 0) - goto fail; - - if (n->policy) { - /* If there is a policy, we need to resolve user/group - * names, which we can't do from PID1, hence let's - * fork. */ - busname_unwatch_control_pid(n); - - r = busname_make_starter(n, &n->control_pid); - if (r < 0) { - log_unit_warning_errno(UNIT(n), r, "Failed to fork 'making' task: %m"); - goto fail; - } - - busname_set_state(n, BUSNAME_MAKING); - } else { - /* If there is no policy, we can do everything - * directly from PID 1, hence do so. */ - - r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, NULL, n->policy_world); - if (r < 0) { - log_unit_warning_errno(UNIT(n), r, "Failed to make starter: %m"); - goto fail; - } - - busname_enter_listening(n); - } - - return; - -fail: - busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); -} - -static void busname_enter_running(BusName *n) { - _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; - bool pending = false; - Unit *other; - Iterator i; - int r; - - assert(n); - - if (!n->activating) - return; - - /* We don't take connections anymore if we are supposed to - * shut down anyway */ - - if (unit_stop_pending(UNIT(n))) { - log_unit_debug(UNIT(n), "Suppressing activation request since unit stop is scheduled."); - - /* Flush all queued activation reqeuest by closing and reopening the connection */ - bus_kernel_drop_one(n->starter_fd); - - busname_enter_listening(n); - return; - } - - /* If there's already a start pending don't bother to do - * anything */ - SET_FOREACH(other, UNIT(n)->dependencies[UNIT_TRIGGERS], i) - if (unit_active_or_pending(other)) { - pending = true; - break; - } - - if (!pending) { - if (!UNIT_ISSET(n->service)) { - log_unit_error(UNIT(n), "Service to activate vanished, refusing activation."); - r = -ENOENT; - goto fail; - } - - r = manager_add_job(UNIT(n)->manager, JOB_START, UNIT_DEREF(n->service), JOB_REPLACE, &error, NULL); - if (r < 0) - goto fail; - } - - busname_set_state(n, BUSNAME_RUNNING); - return; - -fail: - log_unit_warning(UNIT(n), "Failed to queue service startup job: %s", bus_error_message(&error, r)); - busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); -} - -static int busname_start(Unit *u) { - BusName *n = BUSNAME(u); - int r; - - assert(n); - - /* We cannot fulfill this request right now, try again later - * please! */ - if (IN_SET(n->state, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) - return -EAGAIN; - - /* Already on it! */ - if (n->state == BUSNAME_MAKING) - return 0; - - if (n->activating && UNIT_ISSET(n->service)) { - Service *service; - - service = SERVICE(UNIT_DEREF(n->service)); - - if (UNIT(service)->load_state != UNIT_LOADED) { - log_unit_error(u, "Bus service %s not loaded, refusing.", UNIT(service)->id); - return -ENOENT; - } - } - - assert(IN_SET(n->state, BUSNAME_DEAD, BUSNAME_FAILED)); - - r = unit_start_limit_test(u); - if (r < 0) { - busname_enter_dead(n, BUSNAME_FAILURE_START_LIMIT_HIT); - return r; - } - - r = unit_acquire_invocation_id(u); - if (r < 0) - return r; - - n->result = BUSNAME_SUCCESS; - busname_enter_making(n); - - return 1; -} - -static int busname_stop(Unit *u) { - BusName *n = BUSNAME(u); - - assert(n); - - /* Already on it */ - if (IN_SET(n->state, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) - return 0; - - /* If there's already something running, we go directly into - * kill mode. */ - - if (n->state == BUSNAME_MAKING) { - busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_SUCCESS); - return -EAGAIN; - } - - assert(IN_SET(n->state, BUSNAME_REGISTERED, BUSNAME_LISTENING, BUSNAME_RUNNING)); - - busname_enter_dead(n, BUSNAME_SUCCESS); - return 1; -} - -static int busname_serialize(Unit *u, FILE *f, FDSet *fds) { - BusName *n = BUSNAME(u); - int r; - - assert(n); - assert(f); - assert(fds); - - unit_serialize_item(u, f, "state", busname_state_to_string(n->state)); - unit_serialize_item(u, f, "result", busname_result_to_string(n->result)); - - if (n->control_pid > 0) - unit_serialize_item_format(u, f, "control-pid", PID_FMT, n->control_pid); - - r = unit_serialize_item_fd(u, f, fds, "starter-fd", n->starter_fd); - if (r < 0) - return r; - - return 0; -} - -static int busname_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { - BusName *n = BUSNAME(u); - - assert(n); - assert(key); - assert(value); - - if (streq(key, "state")) { - BusNameState state; - - state = busname_state_from_string(value); - if (state < 0) - log_unit_debug(u, "Failed to parse state value: %s", value); - else - n->deserialized_state = state; - - } else if (streq(key, "result")) { - BusNameResult f; - - f = busname_result_from_string(value); - if (f < 0) - log_unit_debug(u, "Failed to parse result value: %s", value); - else if (f != BUSNAME_SUCCESS) - n->result = f; - - } else if (streq(key, "control-pid")) { - pid_t pid; - - if (parse_pid(value, &pid) < 0) - log_unit_debug(u, "Failed to parse control-pid value: %s", value); - else - n->control_pid = pid; - } else if (streq(key, "starter-fd")) { - int fd; - - if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) - log_unit_debug(u, "Failed to parse starter fd value: %s", value); - else { - safe_close(n->starter_fd); - n->starter_fd = fdset_remove(fds, fd); - } - } else - log_unit_debug(u, "Unknown serialization key: %s", key); - - return 0; -} - -_pure_ static UnitActiveState busname_active_state(Unit *u) { - assert(u); - - return state_translation_table[BUSNAME(u)->state]; -} - -_pure_ static const char *busname_sub_state_to_string(Unit *u) { - assert(u); - - return busname_state_to_string(BUSNAME(u)->state); -} - -static int busname_peek_message(BusName *n) { - struct kdbus_cmd_recv cmd_recv = { - .size = sizeof(cmd_recv), - .flags = KDBUS_RECV_PEEK, - }; - struct kdbus_cmd_free cmd_free = { - .size = sizeof(cmd_free), - }; - const char *comm = NULL; - struct kdbus_item *d; - struct kdbus_msg *k; - size_t start, ps, sz, delta; - void *p = NULL; - pid_t pid = 0; - int r; - - /* Generate a friendly debug log message about which process - * caused triggering of this bus name. This simply peeks the - * metadata of the first queued message and logs it. */ - - assert(n); - - /* Let's shortcut things a bit, if debug logging is turned off - * anyway. */ - - if (log_get_max_level() < LOG_DEBUG) - return 0; - - r = ioctl(n->starter_fd, KDBUS_CMD_RECV, &cmd_recv); - if (r < 0) { - if (errno == EINTR || errno == EAGAIN) - return 0; - - return log_unit_error_errno(UNIT(n), errno, "Failed to query activation message: %m"); - } - - /* We map as late as possible, and unmap imemdiately after - * use. On 32bit address space is scarce and we want to be - * able to handle a lot of activator connections at the same - * time, and hence shouldn't keep the mmap()s around for - * longer than necessary. */ - - ps = page_size(); - start = (cmd_recv.msg.offset / ps) * ps; - delta = cmd_recv.msg.offset - start; - sz = PAGE_ALIGN(delta + cmd_recv.msg.msg_size); - - p = mmap(NULL, sz, PROT_READ, MAP_SHARED, n->starter_fd, start); - if (p == MAP_FAILED) { - r = log_unit_error_errno(UNIT(n), errno, "Failed to map activation message: %m"); - goto finish; - } - - k = (struct kdbus_msg *) ((uint8_t *) p + delta); - KDBUS_ITEM_FOREACH(d, k, items) { - switch (d->type) { - - case KDBUS_ITEM_PIDS: - pid = d->pids.pid; - break; - - case KDBUS_ITEM_PID_COMM: - comm = d->str; - break; - } - } - - if (pid > 0) - log_unit_debug(UNIT(n), "Activation triggered by process " PID_FMT " (%s)", pid, strna(comm)); - - r = 0; - -finish: - if (p) - (void) munmap(p, sz); - - cmd_free.offset = cmd_recv.msg.offset; - if (ioctl(n->starter_fd, KDBUS_CMD_FREE, &cmd_free) < 0) - log_unit_warning(UNIT(n), "Failed to free peeked message, ignoring: %m"); - - return r; -} - -static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { - BusName *n = userdata; - - assert(n); - assert(fd >= 0); - - if (n->state != BUSNAME_LISTENING) - return 0; - - log_unit_debug(UNIT(n), "Activation request"); - - if (revents != EPOLLIN) { - log_unit_error(UNIT(n), "Got unexpected poll event (0x%x) on starter fd.", revents); - goto fail; - } - - busname_peek_message(n); - busname_enter_running(n); - return 0; -fail: - - busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); - return 0; -} - -static void busname_sigchld_event(Unit *u, pid_t pid, int code, int status) { - BusName *n = BUSNAME(u); - BusNameResult f; - - assert(n); - assert(pid >= 0); - - if (pid != n->control_pid) - return; - - n->control_pid = 0; - - if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL)) - f = BUSNAME_SUCCESS; - else if (code == CLD_EXITED) - f = BUSNAME_FAILURE_EXIT_CODE; - else if (code == CLD_KILLED) - f = BUSNAME_FAILURE_SIGNAL; - else if (code == CLD_DUMPED) - f = BUSNAME_FAILURE_CORE_DUMP; - else - assert_not_reached("Unknown sigchld code"); - - log_unit_full(u, f == BUSNAME_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, - "Control process exited, code=%s status=%i", sigchld_code_to_string(code), status); - - if (n->result == BUSNAME_SUCCESS) - n->result = f; - - switch (n->state) { - - case BUSNAME_MAKING: - if (f == BUSNAME_SUCCESS) - busname_enter_listening(n); - else - busname_enter_signal(n, BUSNAME_SIGTERM, f); - break; - - case BUSNAME_SIGTERM: - case BUSNAME_SIGKILL: - busname_enter_dead(n, f); - break; - - default: - assert_not_reached("Uh, control process died at wrong time."); - } - - /* Notify clients about changed exit status */ - unit_add_to_dbus_queue(u); -} - -static int busname_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { - BusName *n = BUSNAME(userdata); - - assert(n); - assert(n->timer_event_source == source); - - switch (n->state) { - - case BUSNAME_MAKING: - log_unit_warning(UNIT(n), "Making timed out. Terminating."); - busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_TIMEOUT); - break; - - case BUSNAME_SIGTERM: - log_unit_warning(UNIT(n), "Stopping timed out. Killing."); - busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_FAILURE_TIMEOUT); - break; - - case BUSNAME_SIGKILL: - log_unit_warning(UNIT(n), "Processes still around after SIGKILL. Ignoring."); - busname_enter_dead(n, BUSNAME_FAILURE_TIMEOUT); - break; - - default: - assert_not_reached("Timeout at wrong time."); - } - - return 0; -} - -static void busname_reset_failed(Unit *u) { - BusName *n = BUSNAME(u); - - assert(n); - - if (n->state == BUSNAME_FAILED) - busname_set_state(n, BUSNAME_DEAD); - - n->result = BUSNAME_SUCCESS; -} - -static void busname_trigger_notify(Unit *u, Unit *other) { - BusName *n = BUSNAME(u); - - assert(n); - assert(other); - - if (!IN_SET(n->state, BUSNAME_RUNNING, BUSNAME_LISTENING)) - return; - - if (other->start_limit_hit) { - busname_enter_dead(n, BUSNAME_FAILURE_SERVICE_START_LIMIT_HIT); - return; - } - - if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE) - return; - - if (IN_SET(SERVICE(other)->state, - SERVICE_DEAD, SERVICE_FAILED, - SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, - SERVICE_AUTO_RESTART)) - busname_enter_listening(n); - - if (SERVICE(other)->state == SERVICE_RUNNING) - busname_set_state(n, BUSNAME_RUNNING); -} - -static int busname_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { - return unit_kill_common(u, who, signo, -1, BUSNAME(u)->control_pid, error); -} - -static int busname_get_timeout(Unit *u, usec_t *timeout) { - BusName *n = BUSNAME(u); - usec_t t; - int r; - - if (!n->timer_event_source) - return 0; - - r = sd_event_source_get_time(n->timer_event_source, &t); - if (r < 0) - return r; - if (t == USEC_INFINITY) - return 0; - - *timeout = t; - return 1; -} - -static bool busname_supported(void) { - return false; -} - -static int busname_control_pid(Unit *u) { - BusName *n = BUSNAME(u); - - assert(n); - - return n->control_pid; -} - -static const char* const busname_result_table[_BUSNAME_RESULT_MAX] = { - [BUSNAME_SUCCESS] = "success", - [BUSNAME_FAILURE_RESOURCES] = "resources", - [BUSNAME_FAILURE_TIMEOUT] = "timeout", - [BUSNAME_FAILURE_EXIT_CODE] = "exit-code", - [BUSNAME_FAILURE_SIGNAL] = "signal", - [BUSNAME_FAILURE_CORE_DUMP] = "core-dump", - [BUSNAME_FAILURE_START_LIMIT_HIT] = "start-limit-hit", - [BUSNAME_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit", -}; - -DEFINE_STRING_TABLE_LOOKUP(busname_result, BusNameResult); - -const UnitVTable busname_vtable = { - .object_size = sizeof(BusName), - - .sections = - "Unit\0" - "BusName\0" - "Install\0", - .private_section = "BusName", - - .init = busname_init, - .done = busname_done, - .load = busname_load, - - .coldplug = busname_coldplug, - - .dump = busname_dump, - - .start = busname_start, - .stop = busname_stop, - - .kill = busname_kill, - - .get_timeout = busname_get_timeout, - - .serialize = busname_serialize, - .deserialize_item = busname_deserialize_item, - - .active_state = busname_active_state, - .sub_state_to_string = busname_sub_state_to_string, - - .sigchld_event = busname_sigchld_event, - - .trigger_notify = busname_trigger_notify, - - .reset_failed = busname_reset_failed, - - .supported = busname_supported, - - .control_pid = busname_control_pid, - - .bus_vtable = bus_busname_vtable, - - .status_message_formats = { - .finished_start_job = { - [JOB_DONE] = "Listening on %s.", - [JOB_FAILED] = "Failed to listen on %s.", - }, - .finished_stop_job = { - [JOB_DONE] = "Closed %s.", - [JOB_FAILED] = "Failed stopping %s.", - }, - }, -}; |