From e821075a23fdfa3ca7738fc30bb2d4c430fe10c0 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 2 Dec 2013 23:30:19 +0100 Subject: [PATCH] bus: add .busname unit type to implement kdbus-style bus activation --- Makefile.am | 36 +- TODO | 2 - src/core/busname.c | 600 ++++++++++++++++++++++++++++++++++ src/core/busname.h | 65 ++++ src/core/dbus-busname.c | 40 +++ src/core/dbus-busname.h | 28 ++ src/core/load-fragment-gperf.gperf.m4 | 3 + src/core/load-fragment.c | 45 +++ src/core/load-fragment.h | 1 + src/core/mount.c | 36 +- src/core/socket.c | 399 ++++++++++------------ src/core/unit.c | 5 +- src/core/unit.h | 12 +- src/libsystemd-bus/bus-kernel.c | 50 +++ src/libsystemd-bus/bus-kernel.h | 1 + src/shared/special.h | 1 + src/shared/unit-name.c | 12 +- src/shared/unit-name.h | 5 +- 18 files changed, 1067 insertions(+), 274 deletions(-) create mode 100644 src/core/busname.c create mode 100644 src/core/busname.h create mode 100644 src/core/dbus-busname.c create mode 100644 src/core/dbus-busname.h diff --git a/Makefile.am b/Makefile.am index 0de03fe..ab0a15c 100644 --- a/Makefile.am +++ b/Makefile.am @@ -880,20 +880,22 @@ libsystemd_core_la_SOURCES = \ src/core/load-fragment.h \ src/core/service.c \ src/core/service.h \ - src/core/automount.c \ - src/core/automount.h \ - src/core/mount.c \ - src/core/mount.h \ - src/core/swap.c \ - src/core/swap.h \ - src/core/device.c \ - src/core/device.h \ + src/core/socket.c \ + src/core/socket.h \ + src/core/busname.c \ + src/core/busname.h \ src/core/target.c \ src/core/target.h \ src/core/snapshot.c \ src/core/snapshot.h \ - src/core/socket.c \ - src/core/socket.h \ + src/core/device.c \ + src/core/device.h \ + src/core/mount.c \ + src/core/mount.h \ + src/core/automount.c \ + src/core/automount.h \ + src/core/swap.c \ + src/core/swap.h \ src/core/timer.c \ src/core/timer.h \ src/core/path.c \ @@ -920,20 +922,22 @@ libsystemd_core_la_SOURCES = \ src/core/dbus-service.h \ src/core/dbus-socket.c \ src/core/dbus-socket.h \ - src/core/dbus-timer.c \ - src/core/dbus-timer.h \ + src/core/dbus-busname.c \ + src/core/dbus-busname.h \ src/core/dbus-target.c \ src/core/dbus-target.h \ + src/core/dbus-snapshot.c \ + src/core/dbus-snapshot.h \ + src/core/dbus-device.c \ + src/core/dbus-device.h \ src/core/dbus-mount.c \ src/core/dbus-mount.h \ src/core/dbus-automount.c \ src/core/dbus-automount.h \ src/core/dbus-swap.c \ src/core/dbus-swap.h \ - src/core/dbus-snapshot.c \ - src/core/dbus-snapshot.h \ - src/core/dbus-device.c \ - src/core/dbus-device.h \ + src/core/dbus-timer.c \ + src/core/dbus-timer.h \ src/core/dbus-path.c \ src/core/dbus-path.h \ src/core/dbus-slice.c \ diff --git a/TODO b/TODO index d5b31c2..20a9a07 100644 --- a/TODO +++ b/TODO @@ -116,10 +116,8 @@ Features: * libsystemd-bus: - default policy (allow uid == 0 and our own uid) - access policy as vtable flag - - enforce alignment of pointers passed in - when kdbus doesn't take our message without memfds, try again with memfds - implement translator service - - implement busname unit type in systemd - move to gvariant - implement monitor logic - properly map matches with well-known names against messages with unique names diff --git a/src/core/busname.c b/src/core/busname.c new file mode 100644 index 0000000..c452656 --- /dev/null +++ b/src/core/busname.c @@ -0,0 +1,600 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + 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 . +***/ + +#include "special.h" +#include "bus-kernel.h" +#include "bus-internal.h" +#include "bus-util.h" +#include "service.h" +#include "dbus-busname.h" +#include "busname.h" + +static const UnitActiveState state_translation_table[_BUSNAME_STATE_MAX] = { + [BUSNAME_DEAD] = UNIT_INACTIVE, + [BUSNAME_LISTENING] = UNIT_ACTIVE, + [BUSNAME_RUNNING] = UNIT_ACTIVE, + [BUSNAME_FAILED] = UNIT_FAILED +}; + +static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); + +static void busname_init(Unit *u) { + BusName *n = BUSNAME(u); + + assert(u); + assert(u->load_state == UNIT_STUB); + + n->starter_fd = -1; +} + +static void busname_done(Unit *u) { + BusName *n = BUSNAME(u); + + assert(u); + + free(n->name); + n->name = NULL; + + unit_ref_unset(&n->service); + + n->event_source = sd_event_source_unref(n->event_source); + + if (n->starter_fd >= 0) { + close_nointr_nofail(n->starter_fd); + n->starter_fd = -1; + } +} + +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 (UNIT(n)->manager->running_as == SYSTEMD_SYSTEM) { + 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) { + n->name = unit_name_to_prefix(u->id); + if (!n->name) + return -ENOMEM; + } + + if (!u->description) { + r = unit_set_description(u, n->name); + if (r < 0) + return r; + } + + 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_error_unit(UNIT(n)->id, "%s's Name= setting is not a valid service name Refusing.", UNIT(n)->id); + return -EINVAL; + } + + e = strappenda(n->name, ".busname"); + if (!unit_has_name(UNIT(n), e)) { + log_error_unit(UNIT(n)->id, "%s's Name= setting doesn't match unit name. Refusing.", UNIT(n)->id); + 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", + prefix, busname_state_to_string(n->state), + prefix, busname_result_to_string(n->result), + prefix, n->name); +} + +static void busname_unwatch_fd(BusName *n) { + int r; + + assert(n); + + if (n->event_source) { + r = sd_event_source_set_enabled(n->event_source, SD_EVENT_OFF); + if (r < 0) + log_debug_unit(UNIT(n)->id, "Failed to disable event source."); + } +} + +static void busname_close_fd(BusName *n) { + assert(n); + + if (n->starter_fd <= 0) + return; + + close_nointr_nofail(n->starter_fd); + n->starter_fd = -1; +} + +static int busname_watch_fd(BusName *n) { + int r; + + assert(n); + + if (n->starter_fd < 0) + return 0; + + if (n->event_source) + r = sd_event_source_set_enabled(n->event_source, SD_EVENT_ON); + else + r = sd_event_add_io(UNIT(n)->manager->event, n->starter_fd, EPOLLIN, busname_dispatch_io, n, &n->event_source); + if (r < 0) { + log_warning_unit(UNIT(n)->id, "Failed to watch starter fd: %s", strerror(-r)); + busname_unwatch_fd(n); + return r; + } + + return 0; +} + +static int busname_open_fd(BusName *n) { + assert(n); + + if (n->starter_fd >= 0) + return 0; + + n->starter_fd = bus_kernel_create_starter(UNIT(n)->manager->running_as == SYSTEMD_SYSTEM ? "system" : "user", n->name); + if (n->starter_fd < 0) { + log_warning_unit(UNIT(n)->id, "Failed to create starter fd: %s", strerror(-n->starter_fd)); + return n->starter_fd; + } + + return 0; +} + +static void busname_set_state(BusName *n, BusNameState state) { + BusNameState old_state; + assert(n); + + old_state = n->state; + n->state = state; + + if (state != BUSNAME_LISTENING) + busname_unwatch_fd(n); + + if (!IN_SET(state, BUSNAME_LISTENING, BUSNAME_RUNNING)) + busname_close_fd(n); + + if (state != old_state) + log_debug_unit(UNIT(n)->id, "%s changed %s -> %s", + UNIT(n)->id, 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 (IN_SET(n->deserialized_state, BUSNAME_LISTENING, 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 void busname_enter_dead(BusName *n, BusNameResult f) { + assert(n); + + if (f != BUSNAME_SUCCESS) + n->result = f; + + busname_set_state(n, n->result != BUSNAME_SUCCESS ? BUSNAME_FAILED : BUSNAME_DEAD); +} + +static void busname_enter_listening(BusName *n) { + int r; + + assert(n); + + r = busname_open_fd(n); + if (r < 0) { + log_warning_unit(UNIT(n)->id, "%s failed to listen on bus names: %s", UNIT(n)->id, strerror(-r)); + goto fail; + } + + r = busname_watch_fd(n); + if (r < 0) { + log_warning_unit(UNIT(n)->id, "%s failed to watch names: %s", UNIT(n)->id, strerror(-r)); + goto fail; + } + + busname_set_state(n, BUSNAME_LISTENING); + return; + +fail: + busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); +} + +static void busname_enter_running(BusName *n) { + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + bool pending = false; + Unit *other; + Iterator i; + int r; + + assert(n); + + /* We don't take conenctions anymore if we are supposed to + * shut down anyway */ + + if (unit_stop_pending(UNIT(n))) { + log_debug_unit(UNIT(n)->id, "Suppressing activation request on %s since unit stop is scheduled.", UNIT(n)->id); + 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) { + r = manager_add_job(UNIT(n)->manager, JOB_START, UNIT_DEREF(n->service), JOB_REPLACE, true, &error, NULL); + if (r < 0) + goto fail; + } + + busname_set_state(n, BUSNAME_RUNNING); + return; + +fail: + log_warning_unit(UNIT(n)->id, "%s failed to queue service startup job: %s", UNIT(n)->id, bus_error_message(&error, r)); + busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); +} + +static int busname_start(Unit *u) { + BusName *n = BUSNAME(u); + + assert(n); + + if (UNIT_ISSET(n->service)) { + Service *service; + + service = SERVICE(UNIT_DEREF(n->service)); + + if (UNIT(service)->load_state != UNIT_LOADED) { + log_error_unit(u->id, "Bus service %s not loaded, refusing.", UNIT(service)->id); + return -ENOENT; + } + } + + assert(IN_SET(n->state, BUSNAME_DEAD, BUSNAME_FAILED)); + + n->result = BUSNAME_SUCCESS; + busname_enter_listening(n); + + return 0; +} + +static int busname_stop(Unit *u) { + BusName *n = BUSNAME(u); + + assert(n); + assert(n->state == BUSNAME_LISTENING || n->state == BUSNAME_RUNNING); + + busname_enter_dead(n, BUSNAME_SUCCESS); + return 0; +} + +static int busname_serialize(Unit *u, FILE *f, FDSet *fds) { + BusName *n = BUSNAME(u); + + 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->starter_fd >= 0) { + int copy; + + copy = fdset_put_dup(fds, n->starter_fd); + if (copy < 0) + return copy; + + unit_serialize_item_format(u, f, "starter-fd", "%i", copy); + } + + 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_debug_unit(u->id, "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_debug_unit(u->id, "Failed to parse result value %s", value); + else if (f != BUSNAME_SUCCESS) + n->result = f; + + } else if (streq(key, "starter-fd")) { + int fd; + + if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) + log_debug_unit(u->id, "Failed to parse starter fd value %s", value); + else { + if (n->starter_fd >= 0) + close_nointr_nofail(n->starter_fd); + n->starter_fd = fdset_remove(fds, fd); + } + } else + log_debug_unit(u->id, "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_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_debug_unit(UNIT(n)->id, "Activation request on %s", UNIT(n)->id); + + if (revents != EPOLLIN) { + log_error_unit(UNIT(n)->id, "%s: Got unexpected poll event (0x%x) on starter fd.", + UNIT(n)->id, revents); + goto fail; + } + + busname_enter_running(n); + return 0; +fail: + + busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); + 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); + Service *s; + + assert(n); + assert(other); + + if (!IN_SET(n->state, BUSNAME_RUNNING, BUSNAME_LISTENING)) + return; + + if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE) + return; + + s = SERVICE(other); + + if (s->state == SERVICE_FAILED) { + if (s->result == SERVICE_FAILURE_START_LIMIT) + busname_enter_dead(n, BUSNAME_FAILURE_SERVICE_FAILED_PERMANENT); + else + busname_enter_listening(n); + } + + if (IN_SET(n->state, + SERVICE_DEAD, + SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, + SERVICE_STOP_POST, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, + SERVICE_AUTO_RESTART)) + busname_enter_listening(n); +} + +static const char* const busname_state_table[_BUSNAME_STATE_MAX] = { + [BUSNAME_DEAD] = "dead", + [BUSNAME_LISTENING] = "listening", + [BUSNAME_RUNNING] = "running", + [BUSNAME_FAILED] = "failed" +}; + +DEFINE_STRING_TABLE_LOOKUP(busname_state, BusNameState); + +static const char* const busname_result_table[_BUSNAME_RESULT_MAX] = { + [BUSNAME_SUCCESS] = "success", + [BUSNAME_FAILURE_RESOURCES] = "resources", +}; + +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, + + .serialize = busname_serialize, + .deserialize_item = busname_deserialize_item, + + .active_state = busname_active_state, + .sub_state_to_string = busname_sub_state_to_string, + + .trigger_notify = busname_trigger_notify, + + .reset_failed = busname_reset_failed, + + .bus_interface = "org.freedesktop.systemd1.BusName", + .bus_vtable = bus_busname_vtable, + .bus_changing_properties = bus_busname_changing_properties, + + .status_message_formats = { + .finished_start_job = { + [JOB_DONE] = "Listening on %s.", + [JOB_FAILED] = "Failed to listen on %s.", + [JOB_DEPENDENCY] = "Dependency failed for %s.", + [JOB_TIMEOUT] = "Timed out starting %s.", + }, + .finished_stop_job = { + [JOB_DONE] = "Closed %s.", + [JOB_FAILED] = "Failed stopping %s.", + [JOB_TIMEOUT] = "Timed out stopping %s.", + }, + }, +}; diff --git a/src/core/busname.h b/src/core/busname.h new file mode 100644 index 0000000..6debd48 --- /dev/null +++ b/src/core/busname.h @@ -0,0 +1,65 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#pragma once + +/*** + 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 . +***/ + +typedef struct BusName BusName; + +#include "unit.h" + +typedef enum BusNameState { + BUSNAME_DEAD, + BUSNAME_LISTENING, + BUSNAME_RUNNING, + BUSNAME_FAILED, + _BUSNAME_STATE_MAX, + _BUSNAME_STATE_INVALID = -1 +} BusNameState; + +typedef enum BusNameResult { + BUSNAME_SUCCESS, + BUSNAME_FAILURE_RESOURCES, + BUSNAME_FAILURE_SERVICE_FAILED_PERMANENT, + _BUSNAME_RESULT_MAX, + _BUSNAME_RESULT_INVALID = -1 +} BusNameResult; + +struct BusName { + Unit meta; + + char *name; + int starter_fd; + + UnitRef service; + + BusNameState state, deserialized_state; + BusNameResult result; + + sd_event_source *event_source; +}; + +extern const UnitVTable busname_vtable; + +const char* busname_state_to_string(BusNameState i) _const_; +BusNameState busname_state_from_string(const char *s) _pure_; + +const char* busname_result_to_string(BusNameResult i) _const_; +BusNameResult busname_result_from_string(const char *s) _pure_; diff --git a/src/core/dbus-busname.c b/src/core/dbus-busname.c new file mode 100644 index 0000000..f9511a9 --- /dev/null +++ b/src/core/dbus-busname.c @@ -0,0 +1,40 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + 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 . +***/ + +#include "unit.h" +#include "busname.h" +#include "dbus-unit.h" +#include "dbus-busname.h" +#include "bus-util.h" + +static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, busname_result, BusNameResult); + +const sd_bus_vtable bus_busname_vtable[] = { + SD_BUS_VTABLE_START(0), + SD_BUS_PROPERTY("Name", "s", NULL, offsetof(BusName, name), 0), + SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(BusName, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_VTABLE_END +}; + +const char* const bus_busname_changing_properties[] = { + "Result", + NULL +}; diff --git a/src/core/dbus-busname.h b/src/core/dbus-busname.h new file mode 100644 index 0000000..3a29317 --- /dev/null +++ b/src/core/dbus-busname.h @@ -0,0 +1,28 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#pragma once + +/*** + 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 . +***/ + +#include "sd-bus.h" +#include "unit.h" + +extern const sd_bus_vtable bus_busname_vtable[]; +extern const char* const bus_busname_changing_properties[]; diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4 index 663deae..a5033b2 100644 --- a/src/core/load-fragment-gperf.gperf.m4 +++ b/src/core/load-fragment-gperf.gperf.m4 @@ -223,6 +223,9 @@ EXEC_CONTEXT_CONFIG_ITEMS(Socket)m4_dnl CGROUP_CONTEXT_CONFIG_ITEMS(Socket)m4_dnl KILL_CONTEXT_CONFIG_ITEMS(Socket)m4_dnl m4_dnl +BusName.Name, config_parse_string, 0, offsetof(BusName, name) +BusName.Service, config_parse_busname_service, 0, 0 +m4_dnl Mount.What, config_parse_string, 0, offsetof(Mount, parameters_fragment.what) Mount.Where, config_parse_path, 0, offsetof(Mount, where) Mount.Options, config_parse_string, 0, offsetof(Mount, parameters_fragment.options) diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c index 8a42e73..d43d1b4 100644 --- a/src/core/load-fragment.c +++ b/src/core/load-fragment.c @@ -1457,6 +1457,51 @@ int config_parse_service_timeout(const char *unit, return 0; } +int config_parse_busname_service( + const char *unit, + const char *filename, + unsigned line, + const char *section, + unsigned section_line, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + BusName *n = data; + int r; + Unit *x; + _cleanup_free_ char *p = NULL; + + assert(filename); + assert(lvalue); + assert(rvalue); + assert(data); + + r = unit_name_printf(UNIT(n), rvalue, &p); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, -r, "Failed to resolve specifiers, ignoring: %s", rvalue); + return 0; + } + + if (!endswith(p, ".service")) { + log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Unit must be of type service, ignoring: %s", rvalue); + return 0; + } + + r = manager_load_unit(UNIT(n)->manager, p, NULL, &error, &x); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "Failed to load unit %s, ignoring: %s", rvalue, bus_error_message(&error, r)); + return 0; + } + + unit_ref_set(&n->service, x); + + return 0; +} + int config_parse_unit_env_file(const char *unit, const char *filename, unsigned line, diff --git a/src/core/load-fragment.h b/src/core/load-fragment.h index 31e30e3..dcd09ad 100644 --- a/src/core/load-fragment.h +++ b/src/core/load-fragment.h @@ -63,6 +63,7 @@ int config_parse_trigger_unit(const char *unit, const char *filename, unsigned l int config_parse_path_spec(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); int config_parse_socket_service(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); int config_parse_service_sockets(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); +int config_parse_busname_service(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); int config_parse_unit_env_file(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); int config_parse_ip_tos(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); int config_parse_unit_condition_path(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata); diff --git a/src/core/mount.c b/src/core/mount.c index e46c72a..77493db 100644 --- a/src/core/mount.c +++ b/src/core/mount.c @@ -138,6 +138,8 @@ static void mount_init(Unit *u) { m->directory_mode = 0755; exec_context_init(&m->exec_context); + kill_context_init(&m->kill_context); + cgroup_context_init(&m->cgroup_context); if (unit_has_name(u, "-.mount")) { /* Don't allow start/stop for root directory */ @@ -150,9 +152,6 @@ static void mount_init(Unit *u) { m->exec_context.std_error = u->manager->default_std_error; } - kill_context_init(&m->kill_context); - cgroup_context_init(&m->cgroup_context); - /* We need to make sure that /bin/mount is always called in * the same process group as us, so that the autofs kernel * side doesn't send us another mount request while we are @@ -503,29 +502,22 @@ static int mount_verify(Mount *m) { b = unit_has_name(UNIT(m), e); if (!b) { - log_error_unit(UNIT(m)->id, - "%s's Where setting doesn't match unit name. Refusing.", - UNIT(m)->id); + log_error_unit(UNIT(m)->id, "%s's Where= setting doesn't match unit name. Refusing.", UNIT(m)->id); return -EINVAL; } if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) { - log_error_unit(UNIT(m)->id, - "Cannot create mount unit for API file system %s. Refusing.", - m->where); + log_error_unit(UNIT(m)->id, "Cannot create mount unit for API file system %s. Refusing.", m->where); return -EINVAL; } if (UNIT(m)->fragment_path && !m->parameters_fragment.what) { - log_error_unit(UNIT(m)->id, - "%s's What setting is missing. Refusing.", UNIT(m)->id); + log_error_unit(UNIT(m)->id, "%s's What setting is missing. Refusing.", UNIT(m)->id); return -EBADMSG; } if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) { - log_error_unit(UNIT(m)->id, - "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.", - UNIT(m)->id); + log_error_unit(UNIT(m)->id, "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.",UNIT(m)->id); return -EINVAL; } @@ -536,7 +528,9 @@ static int mount_add_extras(Mount *m) { Unit *u = UNIT(m); int r; - if (UNIT(m)->fragment_path) + assert(m); + + if (u->fragment_path) m->from_fragment = true; if (!m->where) { @@ -551,7 +545,7 @@ static int mount_add_extras(Mount *m) { if (r < 0) return r; - if (!UNIT(m)->description) { + if (!u->description) { r = unit_set_description(u, m->where); if (r < 0) return r; @@ -569,7 +563,7 @@ static int mount_add_extras(Mount *m) { if (r < 0) return r; - if (UNIT(m)->default_dependencies) { + if (u->default_dependencies) { r = mount_add_default_dependencies(m); if (r < 0) return r; @@ -583,6 +577,10 @@ static int mount_add_extras(Mount *m) { if (r < 0) return r; + r = unit_exec_context_defaults(u, &m->exec_context); + if (r < 0) + return r; + return 0; } @@ -606,10 +604,6 @@ static int mount_load(Unit *u) { r = mount_add_extras(m); if (r < 0) return r; - - r = unit_exec_context_defaults(u, &m->exec_context); - if (r < 0) - return r; } return mount_verify(m); diff --git a/src/core/socket.c b/src/core/socket.c index 9e14ffd..aaaa8d6 100644 --- a/src/core/socket.c +++ b/src/core/socket.c @@ -34,8 +34,6 @@ #endif #include "sd-event.h" -#include "unit.h" -#include "socket.h" #include "log.h" #include "load-dropin.h" #include "load-fragment.h" @@ -44,7 +42,6 @@ #include "path-util.h" #include "unit-name.h" #include "unit-printf.h" -#include "dbus-socket.h" #include "missing.h" #include "special.h" #include "label.h" @@ -53,6 +50,9 @@ #include "smack-util.h" #include "bus-util.h" #include "bus-error.h" +#include "dbus-socket.h" +#include "unit.h" +#include "socket.h" static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { [SOCKET_DEAD] = UNIT_INACTIVE, @@ -243,48 +243,6 @@ static bool have_non_accept_socket(Socket *s) { return false; } -static int socket_verify(Socket *s) { - assert(s); - - if (UNIT(s)->load_state != UNIT_LOADED) - return 0; - - if (!s->ports) { - log_error_unit(UNIT(s)->id, - "%s lacks Listen setting. Refusing.", UNIT(s)->id); - return -EINVAL; - } - - if (s->accept && have_non_accept_socket(s)) { - log_error_unit(UNIT(s)->id, - "%s configured for accepting sockets, but sockets are non-accepting. Refusing.", - UNIT(s)->id); - return -EINVAL; - } - - if (s->accept && s->max_connections <= 0) { - log_error_unit(UNIT(s)->id, - "%s's MaxConnection setting too small. Refusing.", UNIT(s)->id); - return -EINVAL; - } - - if (s->accept && UNIT_DEREF(s->service)) { - log_error_unit(UNIT(s)->id, - "Explicit service configuration for accepting sockets not supported on %s. Refusing.", - UNIT(s)->id); - return -EINVAL; - } - - if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { - log_error_unit(UNIT(s)->id, - "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", - UNIT(s)->id); - return -EINVAL; - } - - return 0; -} - static int socket_add_mount_links(Socket *s) { SocketPort *p; int r; @@ -312,20 +270,14 @@ static int socket_add_mount_links(Socket *s) { static int socket_add_device_link(Socket *s) { char *t; - int r; assert(s); if (!s->bind_to_device || streq(s->bind_to_device, "lo")) return 0; - if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0) - return -ENOMEM; - - r = unit_add_node_link(UNIT(s), t, false); - free(t); - - return r; + t = strappenda("/sys/subsystem/net/devices/", s->bind_to_device); + return unit_add_node_link(UNIT(s), t, false); } static int socket_add_default_dependencies(Socket *s) { @@ -356,55 +308,109 @@ _pure_ static bool socket_has_exec(Socket *s) { return false; } -static int socket_load(Unit *u) { - Socket *s = SOCKET(u); +static int socket_add_extras(Socket *s) { + Unit *u = UNIT(s); int r; - assert(u); - assert(u->load_state == UNIT_STUB); - - if ((r = unit_load_fragment_and_dropin(u)) < 0) - return r; - - /* This is a new unit? Then let's add in some extras */ - if (u->load_state == UNIT_LOADED) { - - if (have_non_accept_socket(s)) { - - if (!UNIT_DEREF(s->service)) { - Unit *x; + assert(s); - r = unit_load_related_unit(u, ".service", &x); - if (r < 0) - return r; + if (have_non_accept_socket(s)) { - unit_ref_set(&s->service, x); - } + if (!UNIT_DEREF(s->service)) { + Unit *x; - r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true); + r = unit_load_related_unit(u, ".service", &x); if (r < 0) return r; + + unit_ref_set(&s->service, x); } - if ((r = socket_add_mount_links(s)) < 0) + r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true); + if (r < 0) return r; + } - if ((r = socket_add_device_link(s)) < 0) - return r; + r = socket_add_mount_links(s); + if (r < 0) + return r; - if (socket_has_exec(s)) - if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) - return r; + r = socket_add_device_link(s); + if (r < 0) + return r; + + r = unit_exec_context_defaults(u, &s->exec_context); + if (r < 0) + return r; + + if (socket_has_exec(s)) { + r = unit_add_exec_dependencies(u, &s->exec_context); + if (r < 0) + return r; r = unit_add_default_slice(u); if (r < 0) return r; + } - if (UNIT(s)->default_dependencies) - if ((r = socket_add_default_dependencies(s)) < 0) - return r; + if (u->default_dependencies) { + r = socket_add_default_dependencies(s); + if (r < 0) + return r; + } + + return 0; +} + +static int socket_verify(Socket *s) { + assert(s); + + if (UNIT(s)->load_state != UNIT_LOADED) + return 0; + + if (!s->ports) { + log_error_unit(UNIT(s)->id, "%s lacks Listen setting. Refusing.", UNIT(s)->id); + return -EINVAL; + } + + if (s->accept && have_non_accept_socket(s)) { + log_error_unit(UNIT(s)->id, "%s configured for accepting sockets, but sockets are non-accepting. Refusing.", + UNIT(s)->id); + return -EINVAL; + } + + if (s->accept && s->max_connections <= 0) { + log_error_unit(UNIT(s)->id, "%s's MaxConnection setting too small. Refusing.", UNIT(s)->id); + return -EINVAL; + } - r = unit_exec_context_defaults(u, &s->exec_context); + if (s->accept && UNIT_DEREF(s->service)) { + log_error_unit(UNIT(s)->id, "Explicit service configuration for accepting sockets not supported on %s. Refusing.", UNIT(s)->id); + return -EINVAL; + } + + if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { + log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id); + return -EINVAL; + } + + return 0; +} + +static int socket_load(Unit *u) { + Socket *s = SOCKET(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 = socket_add_extras(s); if (r < 0) return r; } @@ -429,18 +435,15 @@ _const_ static const char* listen_lookup(int family, int type) { } static void socket_dump(Unit *u, FILE *f, const char *prefix) { - SocketExecCommand c; Socket *s = SOCKET(u); SocketPort *p; const char *prefix2; - char *p2; assert(s); assert(f); - p2 = strappend(prefix, "\t"); - prefix2 = p2 ? p2 : prefix; + prefix2 = strappenda(prefix, "\t"); fprintf(f, "%sSocket State: %s\n" @@ -588,8 +591,6 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) { exec_command_dump_list(s->exec_command[c], f, prefix2); } - - free(p2); } static int instance_from_socket(int fd, unsigned nr, char **instance) { @@ -1160,10 +1161,8 @@ static void socket_set_state(Socket *s, SocketState state) { socket_close_fds(s); if (state != old_state) - log_debug_unit(UNIT(s)->id, - "%s changed %s -> %s", UNIT(s)->id, - socket_state_to_string(old_state), - socket_state_to_string(state)); + log_debug_unit(UNIT(s)->id, "%s changed %s -> %s", + UNIT(s)->id, socket_state_to_string(old_state), socket_state_to_string(state)); unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); } @@ -1175,49 +1174,48 @@ static int socket_coldplug(Unit *u) { assert(s); assert(s->state == SOCKET_DEAD); - if (s->deserialized_state != s->state) { - - if (s->deserialized_state == SOCKET_START_PRE || - s->deserialized_state == SOCKET_START_POST || - s->deserialized_state == SOCKET_STOP_PRE || - s->deserialized_state == SOCKET_STOP_PRE_SIGTERM || - s->deserialized_state == SOCKET_STOP_PRE_SIGKILL || - s->deserialized_state == SOCKET_STOP_POST || - s->deserialized_state == SOCKET_FINAL_SIGTERM || - s->deserialized_state == SOCKET_FINAL_SIGKILL) { + if (s->deserialized_state == s->state) + return 0; - if (s->control_pid <= 0) - return -EBADMSG; + if (s->deserialized_state == SOCKET_START_PRE || + s->deserialized_state == SOCKET_START_POST || + s->deserialized_state == SOCKET_STOP_PRE || + s->deserialized_state == SOCKET_STOP_PRE_SIGTERM || + s->deserialized_state == SOCKET_STOP_PRE_SIGKILL || + s->deserialized_state == SOCKET_STOP_POST || + s->deserialized_state == SOCKET_FINAL_SIGTERM || + s->deserialized_state == SOCKET_FINAL_SIGKILL) { - r = unit_watch_pid(UNIT(s), s->control_pid); - if (r < 0) - return r; + if (s->control_pid <= 0) + return -EBADMSG; - r = socket_arm_timer(s); - if (r < 0) - return r; - } + r = unit_watch_pid(UNIT(s), s->control_pid); + if (r < 0) + return r; - if (s->deserialized_state == SOCKET_START_POST || - s->deserialized_state == SOCKET_LISTENING || - s->deserialized_state == SOCKET_RUNNING || - s->deserialized_state == SOCKET_STOP_PRE || - s->deserialized_state == SOCKET_STOP_PRE_SIGTERM || - s->deserialized_state == SOCKET_STOP_PRE_SIGKILL) { - r = socket_open_fds(s); - if (r < 0) - return r; - } + r = socket_arm_timer(s); + if (r < 0) + return r; + } - if (s->deserialized_state == SOCKET_LISTENING) { - r = socket_watch_fds(s); - if (r < 0) - return r; - } + if (s->deserialized_state == SOCKET_START_POST || + s->deserialized_state == SOCKET_LISTENING || + s->deserialized_state == SOCKET_RUNNING || + s->deserialized_state == SOCKET_STOP_PRE || + s->deserialized_state == SOCKET_STOP_PRE_SIGTERM || + s->deserialized_state == SOCKET_STOP_PRE_SIGKILL) { + r = socket_open_fds(s); + if (r < 0) + return r; + } - socket_set_state(s, s->deserialized_state); + if (s->deserialized_state == SOCKET_LISTENING) { + r = socket_watch_fds(s); + if (r < 0) + return r; } + socket_set_state(s, s->deserialized_state); return 0; } @@ -1353,9 +1351,7 @@ static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { return; fail: - log_warning_unit(UNIT(s)->id, - "%s failed to kill processes: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); @@ -1385,9 +1381,7 @@ static void socket_enter_stop_pre(Socket *s, SocketResult f) { return; fail: - log_warning_unit(UNIT(s)->id, - "%s failed to run 'stop-pre' task: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r)); socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); } @@ -1397,9 +1391,7 @@ static void socket_enter_listening(Socket *s) { r = socket_watch_fds(s); if (r < 0) { - log_warning_unit(UNIT(s)->id, - "%s failed to watch sockets: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r)); goto fail; } @@ -1416,9 +1408,7 @@ static void socket_enter_start_post(Socket *s) { r = socket_open_fds(s); if (r < 0) { - log_warning_unit(UNIT(s)->id, - "%s failed to listen on sockets: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r)); goto fail; } @@ -1429,9 +1419,7 @@ static void socket_enter_start_post(Socket *s) { if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) { r = socket_spawn(s, s->control_command, &s->control_pid); if (r < 0) { - log_warning_unit(UNIT(s)->id, - "%s failed to run 'start-post' task: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r)); goto fail; } @@ -1454,7 +1442,8 @@ static void socket_enter_start_pre(Socket *s) { s->control_command_id = SOCKET_EXEC_START_PRE; if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) { - if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) + r = socket_spawn(s, s->control_command, &s->control_pid); + if (r < 0) goto fail; socket_set_state(s, SOCKET_START_PRE); @@ -1464,9 +1453,7 @@ static void socket_enter_start_pre(Socket *s) { return; fail: - log_warning_unit(UNIT(s)->id, - "%s failed to run 'start-pre' task: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r)); socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); } @@ -1479,9 +1466,8 @@ static void socket_enter_running(Socket *s, int cfd) { /* We don't take connections anymore if we are supposed to * shut down anyway */ if (unit_stop_pending(UNIT(s))) { - log_debug_unit(UNIT(s)->id, - "Suppressing connection request on %s since unit stop is scheduled.", - UNIT(s)->id); + + log_debug_unit(UNIT(s)->id, "Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id); if (cfd >= 0) close_nointr_nofail(cfd); @@ -1491,9 +1477,7 @@ static void socket_enter_running(Socket *s, int cfd) { r = socket_watch_fds(s); if (r < 0) { - log_warning_unit(UNIT(s)->id, - "%s failed to watch sockets: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r)); socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); } } @@ -1503,13 +1487,13 @@ static void socket_enter_running(Socket *s, int cfd) { if (cfd < 0) { Iterator i; - Unit *u; + Unit *other; bool pending = false; /* If there's already a start pending don't bother to * do anything */ - SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERS], i) - if (unit_active_or_pending(u)) { + SET_FOREACH(other, UNIT(s)->dependencies[UNIT_TRIGGERS], i) + if (unit_active_or_pending(other)) { pending = true; break; } @@ -1526,9 +1510,7 @@ static void socket_enter_running(Socket *s, int cfd) { Service *service; if (s->n_connections >= s->max_connections) { - log_warning_unit(UNIT(s)->id, - "%s: Too many incoming connections (%u)", - UNIT(s)->id, s->n_connections); + log_warning_unit(UNIT(s)->id, "%s: Too many incoming connections (%u)", UNIT(s)->id, s->n_connections); close_nointr_nofail(cfd); return; } @@ -1555,7 +1537,6 @@ static void socket_enter_running(Socket *s, int cfd) { } name = unit_name_build(prefix, instance, ".service"); - if (!name) { r = -ENOMEM; goto fail; @@ -1591,11 +1572,10 @@ static void socket_enter_running(Socket *s, int cfd) { return; fail: - log_warning_unit(UNIT(s)->id, - "%s failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", - UNIT(s)->id, - cfd >= 0 ? "template" : "non-template", + log_warning_unit(UNIT(s)->id, "%s failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", + UNIT(s)->id, cfd >= 0 ? "template" : "non-template", bus_error_message(&error, r)); + socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); if (cfd >= 0) @@ -1613,15 +1593,14 @@ static void socket_run_next(Socket *s) { s->control_command = s->control_command->command_next; - if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) + r = socket_spawn(s, s->control_command, &s->control_pid); + if (r < 0) goto fail; return; fail: - log_warning_unit(UNIT(s)->id, - "%s failed to run next task: %s", - UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, "%s failed to run next task: %s", UNIT(s)->id, strerror(-r)); if (s->state == SOCKET_START_POST) socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); @@ -1657,9 +1636,7 @@ static int socket_start(Unit *u) { service = SERVICE(UNIT_DEREF(s->service)); if (UNIT(service)->load_state != UNIT_LOADED) { - log_error_unit(u->id, - "Socket service %s not loaded, refusing.", - UNIT(service)->id); + log_error_unit(u->id, "Socket service %s not loaded, refusing.", UNIT(service)->id); return -ENOENT; } @@ -1668,9 +1645,7 @@ static int socket_start(Unit *u) { if (service->state != SERVICE_DEAD && service->state != SERVICE_FAILED && service->state != SERVICE_AUTO_RESTART) { - log_error_unit(u->id, - "Socket service %s already active, refusing.", - UNIT(service)->id); + log_error_unit(u->id, "Socket service %s already active, refusing.", UNIT(service)->id); return -EBUSY; } @@ -1687,6 +1662,7 @@ static int socket_start(Unit *u) { s->result = SOCKET_SUCCESS; socket_enter_start_pre(s); + return 0; } @@ -1778,15 +1754,13 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, assert(u); assert(key); assert(value); - assert(fds); if (streq(key, "state")) { SocketState state; state = socket_state_from_string(value); if (state < 0) - log_debug_unit(u->id, - "Failed to parse state value %s", value); + log_debug_unit(u->id, "Failed to parse state value %s", value); else s->deserialized_state = state; } else if (streq(key, "result")) { @@ -1794,8 +1768,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, f = socket_result_from_string(value); if (f < 0) - log_debug_unit(u->id, - "Failed to parse result value %s", value); + log_debug_unit(u->id, "Failed to parse result value %s", value); else if (f != SOCKET_SUCCESS) s->result = f; @@ -1803,16 +1776,14 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, unsigned k; if (safe_atou(value, &k) < 0) - log_debug_unit(u->id, - "Failed to parse n-accepted value %s", value); + log_debug_unit(u->id, "Failed to parse n-accepted value %s", value); else s->n_accepted += k; } else if (streq(key, "control-pid")) { pid_t pid; if (parse_pid(value, &pid) < 0) - log_debug_unit(u->id, - "Failed to parse control-pid value %s", value); + log_debug_unit(u->id, "Failed to parse control-pid value %s", value); else s->control_pid = pid; } else if (streq(key, "control-command")) { @@ -1820,8 +1791,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, id = socket_exec_command_from_string(value); if (id < 0) - log_debug_unit(u->id, - "Failed to parse exec-command value %s", value); + log_debug_unit(u->id, "Failed to parse exec-command value %s", value); else { s->control_command_id = id; s->control_command = s->exec_command[id]; @@ -1831,8 +1801,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, SocketPort *p; if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) - log_debug_unit(u->id, - "Failed to parse fifo value %s", value); + log_debug_unit(u->id, "Failed to parse fifo value %s", value); else { LIST_FOREACH(port, p, s->ports) @@ -1852,8 +1821,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, SocketPort *p; if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) - log_debug_unit(u->id, - "Failed to parse special value %s", value); + log_debug_unit(u->id, "Failed to parse special value %s", value); else { LIST_FOREACH(port, p, s->ports) @@ -1873,8 +1841,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, SocketPort *p; if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) - log_debug_unit(u->id, - "Failed to parse mqueue value %s", value); + log_debug_unit(u->id, "Failed to parse mqueue value %s", value); else { LIST_FOREACH(port, p, s->ports) @@ -1894,8 +1861,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, SocketPort *p; if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) - log_debug_unit(u->id, - "Failed to parse socket value %s", value); + log_debug_unit(u->id, "Failed to parse socket value %s", value); else { LIST_FOREACH(port, p, s->ports) @@ -1914,8 +1880,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, SocketPort *p; if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) - log_debug_unit(u->id, - "Failed to parse socket value %s", value); + log_debug_unit(u->id, "Failed to parse socket value %s", value); else { LIST_FOREACH(port, p, s->ports) @@ -1929,8 +1894,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value, } } } else - log_debug_unit(UNIT(s)->id, - "Unknown serialization key '%s'", key); + log_debug_unit(UNIT(s)->id, "Unknown serialization key '%s'", key); return 0; } @@ -2039,12 +2003,10 @@ static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, if (revents != EPOLLIN) { if (revents & EPOLLHUP) - log_error_unit(UNIT(p->socket)->id, - "%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", + log_error_unit(UNIT(p->socket)->id, "%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", UNIT(p->socket)->id); else - log_error_unit(UNIT(p->socket)->id, - "%s: Got unexpected poll event (0x%x) on socket.", + log_error_unit(UNIT(p->socket)->id, "%s: Got unexpected poll event (0x%x) on socket.", UNIT(p->socket)->id, revents); goto fail; @@ -2291,6 +2253,17 @@ int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) { return 0; } +static void socket_reset_failed(Unit *u) { + Socket *s = SOCKET(u); + + assert(s); + + if (s->state == SOCKET_FAILED) + socket_set_state(s, SOCKET_DEAD); + + s->result = SOCKET_SUCCESS; +} + static void socket_notify_service_dead(Socket *s, bool failed_permanent) { assert(s); @@ -2300,9 +2273,7 @@ static void socket_notify_service_dead(Socket *s, bool failed_permanent) { * services. */ if (s->state == SOCKET_RUNNING) { - log_debug_unit(UNIT(s)->id, - "%s got notified about service death (failed permanently: %s)", - UNIT(s)->id, yes_no(failed_permanent)); + log_debug_unit(UNIT(s)->id, "%s got notified about service death (failed permanently: %s)", UNIT(s)->id, yes_no(failed_permanent)); if (failed_permanent) socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT); else @@ -2321,24 +2292,12 @@ void socket_connection_unref(Socket *s) { assert(s->n_connections > 0); s->n_connections--; - log_debug_unit(UNIT(s)->id, - "%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections); -} - -static void socket_reset_failed(Unit *u) { - Socket *s = SOCKET(u); - - assert(s); - - if (s->state == SOCKET_FAILED) - socket_set_state(s, SOCKET_DEAD); - - s->result = SOCKET_SUCCESS; + log_debug_unit(UNIT(s)->id, "%s: One connection closed, %u left.", UNIT(s)->id, s->n_connections); } static void socket_trigger_notify(Unit *u, Unit *other) { Socket *s = SOCKET(u); - Service *se = SERVICE(other); + Service *se; assert(u); assert(other); @@ -2354,6 +2313,8 @@ static void socket_trigger_notify(Unit *u, Unit *other) { other->type != UNIT_SERVICE) return; + se = SERVICE(other); + if (se->state == SERVICE_FAILED) socket_notify_service_dead(s, se->result == SERVICE_FAILURE_START_LIMIT); diff --git a/src/core/unit.c b/src/core/unit.c index 31d5f11..50db86c 100644 --- a/src/core/unit.c +++ b/src/core/unit.c @@ -53,14 +53,15 @@ const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { [UNIT_SERVICE] = &service_vtable, - [UNIT_TIMER] = &timer_vtable, [UNIT_SOCKET] = &socket_vtable, + [UNIT_BUSNAME] = &busname_vtable, [UNIT_TARGET] = &target_vtable, + [UNIT_SNAPSHOT] = &snapshot_vtable, [UNIT_DEVICE] = &device_vtable, [UNIT_MOUNT] = &mount_vtable, [UNIT_AUTOMOUNT] = &automount_vtable, - [UNIT_SNAPSHOT] = &snapshot_vtable, [UNIT_SWAP] = &swap_vtable, + [UNIT_TIMER] = &timer_vtable, [UNIT_PATH] = &path_vtable, [UNIT_SLICE] = &slice_vtable, [UNIT_SCOPE] = &scope_vtable diff --git a/src/core/unit.h b/src/core/unit.h index 299ded6..8ceeece 100644 --- a/src/core/unit.h +++ b/src/core/unit.h @@ -276,14 +276,15 @@ typedef enum UnitSetPropertiesMode { } UnitSetPropertiesMode; #include "service.h" -#include "timer.h" #include "socket.h" +#include "busname.h" #include "target.h" +#include "snapshot.h" #include "device.h" #include "mount.h" #include "automount.h" -#include "snapshot.h" #include "swap.h" +#include "timer.h" #include "path.h" #include "slice.h" #include "scope.h" @@ -462,15 +463,16 @@ extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX]; #define UNIT_TRIGGER(u) ((Unit*) set_first((u)->dependencies[UNIT_TRIGGERS])) -DEFINE_CAST(SOCKET, Socket); -DEFINE_CAST(TIMER, Timer); DEFINE_CAST(SERVICE, Service); +DEFINE_CAST(SOCKET, Socket); +DEFINE_CAST(BUSNAME, BusName); DEFINE_CAST(TARGET, Target); +DEFINE_CAST(SNAPSHOT, Snapshot); DEFINE_CAST(DEVICE, Device); DEFINE_CAST(MOUNT, Mount); DEFINE_CAST(AUTOMOUNT, Automount); -DEFINE_CAST(SNAPSHOT, Snapshot); DEFINE_CAST(SWAP, Swap); +DEFINE_CAST(TIMER, Timer); DEFINE_CAST(PATH, Path); DEFINE_CAST(SLICE, Slice); DEFINE_CAST(SCOPE, Scope); diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c index fb852bd..76a55c7 100644 --- a/src/libsystemd-bus/bus-kernel.c +++ b/src/libsystemd-bus/bus-kernel.c @@ -1096,6 +1096,56 @@ int bus_kernel_create_bus(const char *name, char **s) { return fd; } +int bus_kernel_create_starter(const char *bus, const char *name) { + struct kdbus_cmd_hello *hello; + struct kdbus_item *n; + char *p; + int fd; + + assert(bus); + assert(name); + + p = alloca(sizeof("/dev/kdbus/") - 1 + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + sizeof("/bus")); + sprintf(p, "/dev/kdbus/%lu-%s/bus", (unsigned long) getuid(), bus); + + fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC); + if (fd < 0) + return -errno; + + hello = alloca0(ALIGN8(offsetof(struct kdbus_cmd_hello, items) + + offsetof(struct kdbus_item, str) + + strlen(name) + 1)); + + n = hello->items; + strcpy(n->str, name); + n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1; + n->type = KDBUS_ITEM_STARTER_NAME; + + hello->size = ALIGN8(offsetof(struct kdbus_cmd_hello, items) + n->size); + hello->conn_flags = KDBUS_HELLO_STARTER; + hello->pool_size = KDBUS_POOL_SIZE; + + if (ioctl(fd, KDBUS_CMD_HELLO, hello) < 0) { + close_nointr_nofail(fd); + return -errno; + } + + /* The higher 32bit of both flags fields are considered + * 'incompatible flags'. Refuse them all for now. */ + if (hello->bus_flags > 0xFFFFFFFFULL || + hello->conn_flags > 0xFFFFFFFFULL) { + close_nointr_nofail(fd); + return -ENOTSUP; + } + + if (hello->bloom_size != BLOOM_SIZE) { + close_nointr_nofail(fd); + return -ENOTSUP; + } + + return fd; +} + int bus_kernel_create_namespace(const char *name, char **s) { struct kdbus_cmd_ns_make *make; struct kdbus_item *n; diff --git a/src/libsystemd-bus/bus-kernel.h b/src/libsystemd-bus/bus-kernel.h index 92d3888..a9dddc2 100644 --- a/src/libsystemd-bus/bus-kernel.h +++ b/src/libsystemd-bus/bus-kernel.h @@ -62,6 +62,7 @@ int bus_kernel_read_message(sd_bus *bus); int bus_kernel_create_bus(const char *name, char **s); int bus_kernel_create_namespace(const char *name, char **s); +int bus_kernel_create_starter(const char *bus, const char *name); int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *size); void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t size); diff --git a/src/shared/special.h b/src/shared/special.h index 6d252e7..2fe5db5 100644 --- a/src/shared/special.h +++ b/src/shared/special.h @@ -46,6 +46,7 @@ /* Early boot targets */ #define SPECIAL_SYSINIT_TARGET "sysinit.target" #define SPECIAL_SOCKETS_TARGET "sockets.target" +#define SPECIAL_BUSNAMES_TARGET "busnames.target" #define SPECIAL_TIMERS_TARGET "timers.target" #define SPECIAL_PATHS_TARGET "paths.target" #define SPECIAL_LOCAL_FS_TARGET "local-fs.target" diff --git a/src/shared/unit-name.c b/src/shared/unit-name.c index 2335463..178efef 100644 --- a/src/shared/unit-name.c +++ b/src/shared/unit-name.c @@ -36,13 +36,14 @@ static const char* const unit_type_table[_UNIT_TYPE_MAX] = { [UNIT_SERVICE] = "service", [UNIT_SOCKET] = "socket", + [UNIT_BUSNAME] = "busname", [UNIT_TARGET] = "target", + [UNIT_SNAPSHOT] = "snapshot", [UNIT_DEVICE] = "device", [UNIT_MOUNT] = "mount", [UNIT_AUTOMOUNT] = "automount", - [UNIT_SNAPSHOT] = "snapshot", - [UNIT_TIMER] = "timer", [UNIT_SWAP] = "swap", + [UNIT_TIMER] = "timer", [UNIT_PATH] = "path", [UNIT_SLICE] = "slice", [UNIT_SCOPE] = "scope" @@ -441,7 +442,7 @@ char *unit_name_from_path_instance(const char *prefix, const char *path, const c } char *unit_name_to_path(const char *name) { - char *w, *e; + _cleanup_free_ char *w = NULL; assert(name); @@ -449,10 +450,7 @@ char *unit_name_to_path(const char *name) { if (!w) return NULL; - e = unit_name_path_unescape(w); - free(w); - - return e; + return unit_name_path_unescape(w); } char *unit_dbus_path_from_name(const char *name) { diff --git a/src/shared/unit-name.h b/src/shared/unit-name.h index 20138df..57719d5 100644 --- a/src/shared/unit-name.h +++ b/src/shared/unit-name.h @@ -33,13 +33,14 @@ typedef enum UnitLoadState UnitLoadState; enum UnitType { UNIT_SERVICE = 0, UNIT_SOCKET, + UNIT_BUSNAME, UNIT_TARGET, + UNIT_SNAPSHOT, UNIT_DEVICE, UNIT_MOUNT, UNIT_AUTOMOUNT, - UNIT_SNAPSHOT, - UNIT_TIMER, UNIT_SWAP, + UNIT_TIMER, UNIT_PATH, UNIT_SLICE, UNIT_SCOPE, -- 2.7.4