| /*-*- 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 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/stat.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/epoll.h> |
| #include <signal.h> |
| #include <arpa/inet.h> |
| #include <netinet/tcp.h> |
| #include <mqueue.h> |
| |
| #include "sd-event.h" |
| #include "log.h" |
| #include "strv.h" |
| #include "mkdir.h" |
| #include "path-util.h" |
| #include "unit-name.h" |
| #include "unit-printf.h" |
| #include "missing.h" |
| #include "special.h" |
| #include "label.h" |
| #include "exit-status.h" |
| #include "def.h" |
| #include "smack-util.h" |
| #include "bus-util.h" |
| #include "bus-error.h" |
| #include "selinux-util.h" |
| #include "dbus-socket.h" |
| #include "unit.h" |
| #include "formats-util.h" |
| #include "signal-util.h" |
| #include "socket.h" |
| |
| static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { |
| [SOCKET_DEAD] = UNIT_INACTIVE, |
| [SOCKET_START_PRE] = UNIT_ACTIVATING, |
| [SOCKET_START_CHOWN] = UNIT_ACTIVATING, |
| [SOCKET_START_POST] = UNIT_ACTIVATING, |
| [SOCKET_LISTENING] = UNIT_ACTIVE, |
| [SOCKET_RUNNING] = UNIT_ACTIVE, |
| [SOCKET_STOP_PRE] = UNIT_DEACTIVATING, |
| [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, |
| [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, |
| [SOCKET_STOP_POST] = UNIT_DEACTIVATING, |
| [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, |
| [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, |
| [SOCKET_FAILED] = UNIT_FAILED |
| }; |
| |
| static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
| static int socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
| |
| static void socket_init(Unit *u) { |
| Socket *s = SOCKET(u); |
| |
| assert(u); |
| assert(u->load_state == UNIT_STUB); |
| |
| s->backlog = SOMAXCONN; |
| s->timeout_usec = u->manager->default_timeout_start_usec; |
| s->directory_mode = 0755; |
| s->socket_mode = 0666; |
| |
| s->max_connections = 64; |
| |
| s->priority = -1; |
| s->ip_tos = -1; |
| s->ip_ttl = -1; |
| s->mark = -1; |
| |
| s->exec_context.std_output = u->manager->default_std_output; |
| s->exec_context.std_error = u->manager->default_std_error; |
| |
| s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
| } |
| |
| static void socket_unwatch_control_pid(Socket *s) { |
| assert(s); |
| |
| if (s->control_pid <= 0) |
| return; |
| |
| unit_unwatch_pid(UNIT(s), s->control_pid); |
| s->control_pid = 0; |
| } |
| |
| void socket_free_ports(Socket *s) { |
| SocketPort *p; |
| |
| assert(s); |
| |
| while ((p = s->ports)) { |
| LIST_REMOVE(port, s->ports, p); |
| |
| sd_event_source_unref(p->event_source); |
| |
| safe_close(p->fd); |
| free(p->path); |
| free(p); |
| } |
| } |
| |
| static void socket_done(Unit *u) { |
| Socket *s = SOCKET(u); |
| |
| assert(s); |
| |
| socket_free_ports(s); |
| |
| s->exec_runtime = exec_runtime_unref(s->exec_runtime); |
| exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); |
| s->control_command = NULL; |
| |
| socket_unwatch_control_pid(s); |
| |
| unit_ref_unset(&s->service); |
| |
| free(s->tcp_congestion); |
| s->tcp_congestion = NULL; |
| |
| free(s->bind_to_device); |
| s->bind_to_device = NULL; |
| |
| free(s->smack); |
| free(s->smack_ip_in); |
| free(s->smack_ip_out); |
| |
| strv_free(s->symlinks); |
| |
| free(s->user); |
| free(s->group); |
| |
| s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
| } |
| |
| static int socket_arm_timer(Socket *s) { |
| int r; |
| |
| assert(s); |
| |
| if (s->timeout_usec <= 0) { |
| s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
| return 0; |
| } |
| |
| if (s->timer_event_source) { |
| r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec); |
| if (r < 0) |
| return r; |
| |
| return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); |
| } |
| |
| r = sd_event_add_time( |
| UNIT(s)->manager->event, |
| &s->timer_event_source, |
| CLOCK_MONOTONIC, |
| now(CLOCK_MONOTONIC) + s->timeout_usec, 0, |
| socket_dispatch_timer, s); |
| if (r < 0) |
| return r; |
| |
| (void) sd_event_source_set_description(s->timer_event_source, "socket-timer"); |
| |
| return 0; |
| } |
| |
| int socket_instantiate_service(Socket *s) { |
| _cleanup_free_ char *prefix = NULL, *name = NULL; |
| int r; |
| Unit *u; |
| |
| assert(s); |
| |
| /* This fills in s->service if it isn't filled in yet. For |
| * Accept=yes sockets we create the next connection service |
| * here. For Accept=no this is mostly a NOP since the service |
| * is figured out at load time anyway. */ |
| |
| if (UNIT_DEREF(s->service)) |
| return 0; |
| |
| if (!s->accept) |
| return 0; |
| |
| r = unit_name_to_prefix(UNIT(s)->id, &prefix); |
| if (r < 0) |
| return r; |
| |
| if (asprintf(&name, "%s@%u.service", prefix, s->n_accepted) < 0) |
| return -ENOMEM; |
| |
| r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u); |
| if (r < 0) |
| return r; |
| |
| u->no_gc = true; |
| unit_ref_set(&s->service, u); |
| |
| return unit_add_two_dependencies(UNIT(s), UNIT_BEFORE, UNIT_TRIGGERS, u, false); |
| } |
| |
| static bool have_non_accept_socket(Socket *s) { |
| SocketPort *p; |
| |
| assert(s); |
| |
| if (!s->accept) |
| return true; |
| |
| LIST_FOREACH(port, p, s->ports) { |
| |
| if (p->type != SOCKET_SOCKET) |
| return true; |
| |
| if (!socket_address_can_accept(&p->address)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int socket_add_mount_links(Socket *s) { |
| SocketPort *p; |
| int r; |
| |
| assert(s); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| const char *path = NULL; |
| |
| if (p->type == SOCKET_SOCKET) |
| path = socket_address_get_path(&p->address); |
| else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) |
| path = p->path; |
| |
| if (!path) |
| continue; |
| |
| r = unit_require_mounts_for(UNIT(s), path); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int socket_add_device_link(Socket *s) { |
| char *t; |
| |
| assert(s); |
| |
| if (!s->bind_to_device || streq(s->bind_to_device, "lo")) |
| return 0; |
| |
| t = strjoina("/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) { |
| int r; |
| assert(s); |
| |
| r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true); |
| if (r < 0) |
| return r; |
| |
| if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) { |
| r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); |
| if (r < 0) |
| return r; |
| } |
| |
| return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); |
| } |
| |
| _pure_ static bool socket_has_exec(Socket *s) { |
| unsigned i; |
| assert(s); |
| |
| for (i = 0; i < _SOCKET_EXEC_COMMAND_MAX; i++) |
| if (s->exec_command[i]) |
| return true; |
| |
| return false; |
| } |
| |
| static int socket_add_extras(Socket *s) { |
| Unit *u = UNIT(s); |
| int r; |
| |
| assert(s); |
| |
| if (have_non_accept_socket(s)) { |
| |
| if (!UNIT_DEREF(s->service)) { |
| Unit *x; |
| |
| r = unit_load_related_unit(u, ".service", &x); |
| if (r < 0) |
| return r; |
| |
| unit_ref_set(&s->service, x); |
| } |
| |
| r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(s->service), true); |
| if (r < 0) |
| return r; |
| } |
| |
| r = socket_add_mount_links(s); |
| if (r < 0) |
| return r; |
| |
| r = socket_add_device_link(s); |
| if (r < 0) |
| return r; |
| |
| r = unit_patch_contexts(u); |
| 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_set_default_slice(u); |
| if (r < 0) |
| return r; |
| } |
| |
| if (u->default_dependencies) { |
| r = socket_add_default_dependencies(s); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static const char *socket_find_symlink_target(Socket *s) { |
| const char *found = NULL; |
| SocketPort *p; |
| |
| LIST_FOREACH(port, p, s->ports) { |
| const char *f = NULL; |
| |
| switch (p->type) { |
| |
| case SOCKET_FIFO: |
| f = p->path; |
| break; |
| |
| case SOCKET_SOCKET: |
| if (p->address.sockaddr.un.sun_path[0] != 0) |
| f = p->address.sockaddr.un.sun_path; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (f) { |
| if (found) |
| return NULL; |
| |
| found = f; |
| } |
| } |
| |
| return found; |
| } |
| |
| static int socket_verify(Socket *s) { |
| assert(s); |
| |
| if (UNIT(s)->load_state != UNIT_LOADED) |
| return 0; |
| |
| if (!s->ports) { |
| log_unit_error(UNIT(s), "Unit lacks Listen setting. Refusing."); |
| return -EINVAL; |
| } |
| |
| if (s->accept && have_non_accept_socket(s)) { |
| log_unit_error(UNIT(s), "Unit configured for accepting sockets, but sockets are non-accepting. Refusing."); |
| return -EINVAL; |
| } |
| |
| if (s->accept && s->max_connections <= 0) { |
| log_unit_error(UNIT(s), "MaxConnection= setting too small. Refusing."); |
| return -EINVAL; |
| } |
| |
| if (s->accept && UNIT_DEREF(s->service)) { |
| log_unit_error(UNIT(s), "Explicit service configuration for accepting socket units not supported. Refusing."); |
| return -EINVAL; |
| } |
| |
| if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
| log_unit_error(UNIT(s), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing."); |
| return -EINVAL; |
| } |
| |
| if (!strv_isempty(s->symlinks) && !socket_find_symlink_target(s)) { |
| log_unit_error(UNIT(s), "Unit has symlinks set but none or more than one node in the file system. Refusing."); |
| 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; |
| } |
| |
| return socket_verify(s); |
| } |
| |
| _const_ static const char* listen_lookup(int family, int type) { |
| |
| if (family == AF_NETLINK) |
| return "ListenNetlink"; |
| |
| if (type == SOCK_STREAM) |
| return "ListenStream"; |
| else if (type == SOCK_DGRAM) |
| return "ListenDatagram"; |
| else if (type == SOCK_SEQPACKET) |
| return "ListenSequentialPacket"; |
| |
| assert_not_reached("Unknown socket type"); |
| return NULL; |
| } |
| |
| static void socket_dump(Unit *u, FILE *f, const char *prefix) { |
| char time_string[FORMAT_TIMESPAN_MAX]; |
| SocketExecCommand c; |
| Socket *s = SOCKET(u); |
| SocketPort *p; |
| const char *prefix2; |
| |
| assert(s); |
| assert(f); |
| |
| prefix = strempty(prefix); |
| prefix2 = strjoina(prefix, "\t"); |
| |
| fprintf(f, |
| "%sSocket State: %s\n" |
| "%sResult: %s\n" |
| "%sBindIPv6Only: %s\n" |
| "%sBacklog: %u\n" |
| "%sSocketMode: %04o\n" |
| "%sDirectoryMode: %04o\n" |
| "%sKeepAlive: %s\n" |
| "%sNoDelay: %s\n" |
| "%sFreeBind: %s\n" |
| "%sTransparent: %s\n" |
| "%sBroadcast: %s\n" |
| "%sPassCredentials: %s\n" |
| "%sPassSecurity: %s\n" |
| "%sTCPCongestion: %s\n" |
| "%sRemoveOnStop: %s\n" |
| "%sSELinuxContextFromNet: %s\n", |
| prefix, socket_state_to_string(s->state), |
| prefix, socket_result_to_string(s->result), |
| prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only), |
| prefix, s->backlog, |
| prefix, s->socket_mode, |
| prefix, s->directory_mode, |
| prefix, yes_no(s->keep_alive), |
| prefix, yes_no(s->no_delay), |
| prefix, yes_no(s->free_bind), |
| prefix, yes_no(s->transparent), |
| prefix, yes_no(s->broadcast), |
| prefix, yes_no(s->pass_cred), |
| prefix, yes_no(s->pass_sec), |
| prefix, strna(s->tcp_congestion), |
| prefix, yes_no(s->remove_on_stop), |
| prefix, yes_no(s->selinux_context_from_net)); |
| |
| if (s->control_pid > 0) |
| fprintf(f, |
| "%sControl PID: "PID_FMT"\n", |
| prefix, s->control_pid); |
| |
| if (s->bind_to_device) |
| fprintf(f, |
| "%sBindToDevice: %s\n", |
| prefix, s->bind_to_device); |
| |
| if (s->accept) |
| fprintf(f, |
| "%sAccepted: %u\n" |
| "%sNConnections: %u\n" |
| "%sMaxConnections: %u\n", |
| prefix, s->n_accepted, |
| prefix, s->n_connections, |
| prefix, s->max_connections); |
| |
| if (s->priority >= 0) |
| fprintf(f, |
| "%sPriority: %i\n", |
| prefix, s->priority); |
| |
| if (s->receive_buffer > 0) |
| fprintf(f, |
| "%sReceiveBuffer: %zu\n", |
| prefix, s->receive_buffer); |
| |
| if (s->send_buffer > 0) |
| fprintf(f, |
| "%sSendBuffer: %zu\n", |
| prefix, s->send_buffer); |
| |
| if (s->ip_tos >= 0) |
| fprintf(f, |
| "%sIPTOS: %i\n", |
| prefix, s->ip_tos); |
| |
| if (s->ip_ttl >= 0) |
| fprintf(f, |
| "%sIPTTL: %i\n", |
| prefix, s->ip_ttl); |
| |
| if (s->pipe_size > 0) |
| fprintf(f, |
| "%sPipeSize: %zu\n", |
| prefix, s->pipe_size); |
| |
| if (s->mark >= 0) |
| fprintf(f, |
| "%sMark: %i\n", |
| prefix, s->mark); |
| |
| if (s->mq_maxmsg > 0) |
| fprintf(f, |
| "%sMessageQueueMaxMessages: %li\n", |
| prefix, s->mq_maxmsg); |
| |
| if (s->mq_msgsize > 0) |
| fprintf(f, |
| "%sMessageQueueMessageSize: %li\n", |
| prefix, s->mq_msgsize); |
| |
| if (s->reuse_port) |
| fprintf(f, |
| "%sReusePort: %s\n", |
| prefix, yes_no(s->reuse_port)); |
| |
| if (s->smack) |
| fprintf(f, |
| "%sSmackLabel: %s\n", |
| prefix, s->smack); |
| |
| if (s->smack_ip_in) |
| fprintf(f, |
| "%sSmackLabelIPIn: %s\n", |
| prefix, s->smack_ip_in); |
| |
| if (s->smack_ip_out) |
| fprintf(f, |
| "%sSmackLabelIPOut: %s\n", |
| prefix, s->smack_ip_out); |
| |
| if (!isempty(s->user) || !isempty(s->group)) |
| fprintf(f, |
| "%sOwnerUser: %s\n" |
| "%sOwnerGroup: %s\n", |
| prefix, strna(s->user), |
| prefix, strna(s->group)); |
| |
| if (s->keep_alive_time > 0) |
| fprintf(f, |
| "%sKeepAliveTimeSec: %s\n", |
| prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_time, USEC_PER_SEC)); |
| |
| if (s->keep_alive_interval) |
| fprintf(f, |
| "%sKeepAliveIntervalSec: %s\n", |
| prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->keep_alive_interval, USEC_PER_SEC)); |
| |
| if (s->keep_alive_cnt) |
| fprintf(f, |
| "%sKeepAliveProbes: %u\n", |
| prefix, s->keep_alive_cnt); |
| |
| if (s->defer_accept) |
| fprintf(f, |
| "%sDeferAcceptSec: %s\n", |
| prefix, format_timespan(time_string, FORMAT_TIMESPAN_MAX, s->defer_accept, USEC_PER_SEC)); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| |
| if (p->type == SOCKET_SOCKET) { |
| const char *t; |
| int r; |
| char *k = NULL; |
| |
| if ((r = socket_address_print(&p->address, &k)) < 0) |
| t = strerror(-r); |
| else |
| t = k; |
| |
| fprintf(f, "%s%s: %s\n", prefix, listen_lookup(socket_address_family(&p->address), p->address.type), t); |
| free(k); |
| } else if (p->type == SOCKET_SPECIAL) |
| fprintf(f, "%sListenSpecial: %s\n", prefix, p->path); |
| else if (p->type == SOCKET_MQUEUE) |
| fprintf(f, "%sListenMessageQueue: %s\n", prefix, p->path); |
| else |
| fprintf(f, "%sListenFIFO: %s\n", prefix, p->path); |
| } |
| |
| exec_context_dump(&s->exec_context, f, prefix); |
| kill_context_dump(&s->kill_context, f, prefix); |
| |
| for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { |
| if (!s->exec_command[c]) |
| continue; |
| |
| fprintf(f, "%s-> %s:\n", |
| prefix, socket_exec_command_to_string(c)); |
| |
| exec_command_dump_list(s->exec_command[c], f, prefix2); |
| } |
| } |
| |
| static int instance_from_socket(int fd, unsigned nr, char **instance) { |
| socklen_t l; |
| char *r; |
| union sockaddr_union local, remote; |
| |
| assert(fd >= 0); |
| assert(instance); |
| |
| l = sizeof(local); |
| if (getsockname(fd, &local.sa, &l) < 0) |
| return -errno; |
| |
| l = sizeof(remote); |
| if (getpeername(fd, &remote.sa, &l) < 0) |
| return -errno; |
| |
| switch (local.sa.sa_family) { |
| |
| case AF_INET: { |
| uint32_t |
| a = ntohl(local.in.sin_addr.s_addr), |
| b = ntohl(remote.in.sin_addr.s_addr); |
| |
| if (asprintf(&r, |
| "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
| nr, |
| a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF, |
| ntohs(local.in.sin_port), |
| b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF, |
| ntohs(remote.in.sin_port)) < 0) |
| return -ENOMEM; |
| |
| break; |
| } |
| |
| case AF_INET6: { |
| static const unsigned char ipv4_prefix[] = { |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF |
| }; |
| |
| if (memcmp(&local.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0 && |
| memcmp(&remote.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) { |
| const uint8_t |
| *a = local.in6.sin6_addr.s6_addr+12, |
| *b = remote.in6.sin6_addr.s6_addr+12; |
| |
| if (asprintf(&r, |
| "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u", |
| nr, |
| a[0], a[1], a[2], a[3], |
| ntohs(local.in6.sin6_port), |
| b[0], b[1], b[2], b[3], |
| ntohs(remote.in6.sin6_port)) < 0) |
| return -ENOMEM; |
| } else { |
| char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN]; |
| |
| if (asprintf(&r, |
| "%u-%s:%u-%s:%u", |
| nr, |
| inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)), |
| ntohs(local.in6.sin6_port), |
| inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)), |
| ntohs(remote.in6.sin6_port)) < 0) |
| return -ENOMEM; |
| } |
| |
| break; |
| } |
| |
| case AF_UNIX: { |
| struct ucred ucred; |
| int k; |
| |
| k = getpeercred(fd, &ucred); |
| if (k >= 0) { |
| if (asprintf(&r, |
| "%u-"PID_FMT"-"UID_FMT, |
| nr, ucred.pid, ucred.uid) < 0) |
| return -ENOMEM; |
| } else if (k == -ENODATA) { |
| /* This handles the case where somebody is |
| * connecting from another pid/uid namespace |
| * (e.g. from outside of our container). */ |
| if (asprintf(&r, |
| "%u-unknown", |
| nr) < 0) |
| return -ENOMEM; |
| } else |
| return k; |
| |
| break; |
| } |
| |
| default: |
| assert_not_reached("Unhandled socket type."); |
| } |
| |
| *instance = r; |
| return 0; |
| } |
| |
| static void socket_close_fds(Socket *s) { |
| SocketPort *p; |
| char **i; |
| |
| assert(s); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| |
| p->event_source = sd_event_source_unref(p->event_source); |
| |
| if (p->fd < 0) |
| continue; |
| |
| p->fd = safe_close(p->fd); |
| |
| /* One little note: we should normally not delete any |
| * sockets in the file system here! After all some |
| * other process we spawned might still have a |
| * reference of this fd and wants to continue to use |
| * it. Therefore we delete sockets in the file system |
| * before we create a new one, not after we stopped |
| * using one! */ |
| |
| if (s->remove_on_stop) { |
| switch (p->type) { |
| |
| case SOCKET_FIFO: |
| unlink(p->path); |
| break; |
| |
| case SOCKET_MQUEUE: |
| mq_unlink(p->path); |
| break; |
| |
| case SOCKET_SOCKET: |
| socket_address_unlink(&p->address); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| } |
| |
| if (s->remove_on_stop) |
| STRV_FOREACH(i, s->symlinks) |
| unlink(*i); |
| } |
| |
| static void socket_apply_socket_options(Socket *s, int fd) { |
| int r; |
| |
| assert(s); |
| assert(fd >= 0); |
| |
| if (s->keep_alive) { |
| int b = s->keep_alive; |
| if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &b, sizeof(b)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_KEEPALIVE failed: %m"); |
| } |
| |
| if (s->keep_alive_time) { |
| int value = s->keep_alive_time / USEC_PER_SEC; |
| if (setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &value, sizeof(value)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPIDLE failed: %m"); |
| } |
| |
| if (s->keep_alive_interval) { |
| int value = s->keep_alive_interval / USEC_PER_SEC; |
| if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &value, sizeof(value)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPINTVL failed: %m"); |
| } |
| |
| if (s->keep_alive_cnt) { |
| int value = s->keep_alive_cnt; |
| if (setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &value, sizeof(value)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "TCP_KEEPCNT failed: %m"); |
| } |
| |
| if (s->defer_accept) { |
| int value = s->defer_accept / USEC_PER_SEC; |
| if (setsockopt(fd, SOL_TCP, TCP_DEFER_ACCEPT, &value, sizeof(value)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "TCP_DEFER_ACCEPT failed: %m"); |
| } |
| |
| if (s->no_delay) { |
| int b = s->no_delay; |
| if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &b, sizeof(b)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "TCP_NODELAY failed: %m"); |
| } |
| |
| if (s->broadcast) { |
| int one = 1; |
| if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_BROADCAST failed: %m"); |
| } |
| |
| if (s->pass_cred) { |
| int one = 1; |
| if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_PASSCRED failed: %m"); |
| } |
| |
| if (s->pass_sec) { |
| int one = 1; |
| if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_PASSSEC failed: %m"); |
| } |
| |
| if (s->priority >= 0) |
| if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_PRIORITY failed: %m"); |
| |
| if (s->receive_buffer > 0) { |
| int value = (int) s->receive_buffer; |
| |
| /* We first try with SO_RCVBUFFORCE, in case we have the perms for that */ |
| |
| if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0) |
| if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_RCVBUF failed: %m"); |
| } |
| |
| if (s->send_buffer > 0) { |
| int value = (int) s->send_buffer; |
| if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0) |
| if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_SNDBUF failed: %m"); |
| } |
| |
| if (s->mark >= 0) |
| if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "SO_MARK failed: %m"); |
| |
| if (s->ip_tos >= 0) |
| if (setsockopt(fd, IPPROTO_IP, IP_TOS, &s->ip_tos, sizeof(s->ip_tos)) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "IP_TOS failed: %m"); |
| |
| if (s->ip_ttl >= 0) { |
| int x; |
| |
| r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl)); |
| |
| if (socket_ipv6_is_supported()) |
| x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl)); |
| else { |
| x = -1; |
| errno = EAFNOSUPPORT; |
| } |
| |
| if (r < 0 && x < 0) |
| log_unit_warning_errno(UNIT(s), errno, "IP_TTL/IPV6_UNICAST_HOPS failed: %m"); |
| } |
| |
| if (s->tcp_congestion) |
| if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "TCP_CONGESTION failed: %m"); |
| |
| if (s->smack_ip_in) { |
| r = mac_smack_apply_fd(fd, SMACK_ATTR_IPIN, s->smack_ip_in); |
| if (r < 0) |
| log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_in_fd: %m"); |
| } |
| |
| if (s->smack_ip_out) { |
| r = mac_smack_apply_fd(fd, SMACK_ATTR_IPOUT, s->smack_ip_out); |
| if (r < 0) |
| log_unit_error_errno(UNIT(s), r, "mac_smack_apply_ip_out_fd: %m"); |
| } |
| } |
| |
| static void socket_apply_fifo_options(Socket *s, int fd) { |
| int r; |
| |
| assert(s); |
| assert(fd >= 0); |
| |
| if (s->pipe_size > 0) |
| if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) |
| log_unit_warning_errno(UNIT(s), errno, "F_SETPIPE_SZ: %m"); |
| |
| if (s->smack) { |
| r = mac_smack_apply_fd(fd, SMACK_ATTR_ACCESS, s->smack); |
| if (r < 0) |
| log_unit_error_errno(UNIT(s), r, "mac_smack_apply_fd: %m"); |
| } |
| } |
| |
| static int fifo_address_create( |
| const char *path, |
| mode_t directory_mode, |
| mode_t socket_mode, |
| int *_fd) { |
| |
| int fd = -1, r = 0; |
| struct stat st; |
| mode_t old_mask; |
| |
| assert(path); |
| assert(_fd); |
| |
| mkdir_parents_label(path, directory_mode); |
| |
| r = mac_selinux_create_file_prepare(path, S_IFIFO); |
| if (r < 0) |
| goto fail; |
| |
| /* Enforce the right access mode for the fifo */ |
| old_mask = umask(~ socket_mode); |
| |
| /* Include the original umask in our mask */ |
| umask(~socket_mode | old_mask); |
| |
| r = mkfifo(path, socket_mode); |
| umask(old_mask); |
| |
| if (r < 0 && errno != EEXIST) { |
| r = -errno; |
| goto fail; |
| } |
| |
| if ((fd = open(path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| mac_selinux_create_file_clear(); |
| |
| if (fstat(fd, &st) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| if (!S_ISFIFO(st.st_mode) || |
| (st.st_mode & 0777) != (socket_mode & ~old_mask) || |
| st.st_uid != getuid() || |
| st.st_gid != getgid()) { |
| |
| r = -EEXIST; |
| goto fail; |
| } |
| |
| *_fd = fd; |
| return 0; |
| |
| fail: |
| mac_selinux_create_file_clear(); |
| safe_close(fd); |
| |
| return r; |
| } |
| |
| static int special_address_create( |
| const char *path, |
| int *_fd) { |
| |
| int fd = -1, r = 0; |
| struct stat st; |
| |
| assert(path); |
| assert(_fd); |
| |
| fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW); |
| if (fd < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| if (fstat(fd, &st) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| /* Check whether this is a /proc, /sys or /dev file or char device */ |
| if (!S_ISREG(st.st_mode) && !S_ISCHR(st.st_mode)) { |
| r = -EEXIST; |
| goto fail; |
| } |
| |
| *_fd = fd; |
| return 0; |
| |
| fail: |
| safe_close(fd); |
| |
| return r; |
| } |
| |
| static int mq_address_create( |
| const char *path, |
| mode_t mq_mode, |
| long maxmsg, |
| long msgsize, |
| int *_fd) { |
| |
| int fd = -1, r = 0; |
| struct stat st; |
| mode_t old_mask; |
| struct mq_attr _attr, *attr = NULL; |
| |
| assert(path); |
| assert(_fd); |
| |
| if (maxmsg > 0 && msgsize > 0) { |
| zero(_attr); |
| _attr.mq_flags = O_NONBLOCK; |
| _attr.mq_maxmsg = maxmsg; |
| _attr.mq_msgsize = msgsize; |
| attr = &_attr; |
| } |
| |
| /* Enforce the right access mode for the mq */ |
| old_mask = umask(~ mq_mode); |
| |
| /* Include the original umask in our mask */ |
| umask(~mq_mode | old_mask); |
| fd = mq_open(path, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_CREAT, mq_mode, attr); |
| umask(old_mask); |
| |
| if (fd < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| if (fstat(fd, &st) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| if ((st.st_mode & 0777) != (mq_mode & ~old_mask) || |
| st.st_uid != getuid() || |
| st.st_gid != getgid()) { |
| |
| r = -EEXIST; |
| goto fail; |
| } |
| |
| *_fd = fd; |
| return 0; |
| |
| fail: |
| safe_close(fd); |
| return r; |
| } |
| |
| static int socket_symlink(Socket *s) { |
| const char *p; |
| char **i; |
| |
| assert(s); |
| |
| p = socket_find_symlink_target(s); |
| if (!p) |
| return 0; |
| |
| STRV_FOREACH(i, s->symlinks) |
| symlink_label(p, *i); |
| |
| return 0; |
| } |
| |
| static int socket_open_fds(Socket *s) { |
| SocketPort *p; |
| int r; |
| char *label = NULL; |
| bool know_label = false; |
| |
| assert(s); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| |
| if (p->fd >= 0) |
| continue; |
| |
| if (p->type == SOCKET_SOCKET) { |
| |
| if (!know_label) { |
| /* Figure out label, if we don't it know |
| * yet. We do it once, for the first |
| * socket where we need this and |
| * remember it for the rest. */ |
| |
| if (s->selinux_context_from_net) { |
| /* Get it from the network label */ |
| |
| r = mac_selinux_get_our_label(&label); |
| if (r < 0 && r != -EOPNOTSUPP) |
| goto rollback; |
| |
| } else { |
| /* Get it from the executable we are about to start */ |
| |
| r = socket_instantiate_service(s); |
| if (r < 0) |
| goto rollback; |
| |
| if (UNIT_ISSET(s->service) && |
| SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) { |
| r = mac_selinux_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label); |
| if (r < 0 && r != -EPERM && r != -EOPNOTSUPP) |
| goto rollback; |
| } |
| } |
| |
| know_label = true; |
| } |
| |
| r = socket_address_listen( |
| &p->address, |
| SOCK_CLOEXEC|SOCK_NONBLOCK, |
| s->backlog, |
| s->bind_ipv6_only, |
| s->bind_to_device, |
| s->reuse_port, |
| s->free_bind, |
| s->transparent, |
| s->directory_mode, |
| s->socket_mode, |
| label); |
| if (r < 0) |
| goto rollback; |
| |
| p->fd = r; |
| socket_apply_socket_options(s, p->fd); |
| socket_symlink(s); |
| |
| } else if (p->type == SOCKET_SPECIAL) { |
| |
| r = special_address_create( |
| p->path, |
| &p->fd); |
| if (r < 0) |
| goto rollback; |
| |
| } else if (p->type == SOCKET_FIFO) { |
| |
| r = fifo_address_create( |
| p->path, |
| s->directory_mode, |
| s->socket_mode, |
| &p->fd); |
| if (r < 0) |
| goto rollback; |
| |
| socket_apply_fifo_options(s, p->fd); |
| socket_symlink(s); |
| |
| } else if (p->type == SOCKET_MQUEUE) { |
| |
| r = mq_address_create( |
| p->path, |
| s->socket_mode, |
| s->mq_maxmsg, |
| s->mq_msgsize, |
| &p->fd); |
| if (r < 0) |
| goto rollback; |
| } else |
| assert_not_reached("Unknown port type"); |
| } |
| |
| mac_selinux_free(label); |
| return 0; |
| |
| rollback: |
| socket_close_fds(s); |
| mac_selinux_free(label); |
| |
| return r; |
| } |
| |
| static void socket_unwatch_fds(Socket *s) { |
| SocketPort *p; |
| int r; |
| |
| assert(s); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| if (p->fd < 0) |
| continue; |
| |
| if (!p->event_source) |
| continue; |
| |
| r = sd_event_source_set_enabled(p->event_source, SD_EVENT_OFF); |
| if (r < 0) |
| log_unit_debug_errno(UNIT(s), r, "Failed to disable event source: %m"); |
| } |
| } |
| |
| static int socket_watch_fds(Socket *s) { |
| SocketPort *p; |
| int r; |
| |
| assert(s); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| if (p->fd < 0) |
| continue; |
| |
| if (p->event_source) { |
| r = sd_event_source_set_enabled(p->event_source, SD_EVENT_ON); |
| if (r < 0) |
| goto fail; |
| } else { |
| r = sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd, EPOLLIN, socket_dispatch_io, p); |
| if (r < 0) |
| goto fail; |
| |
| (void) sd_event_source_set_description(p->event_source, "socket-port-io"); |
| } |
| } |
| |
| return 0; |
| |
| fail: |
| log_unit_warning_errno(UNIT(s), r, "Failed to watch listening fds: %m"); |
| socket_unwatch_fds(s); |
| return r; |
| } |
| |
| static void socket_set_state(Socket *s, SocketState state) { |
| SocketState old_state; |
| assert(s); |
| |
| old_state = s->state; |
| s->state = state; |
| |
| if (!IN_SET(state, |
| SOCKET_START_PRE, |
| SOCKET_START_CHOWN, |
| SOCKET_START_POST, |
| SOCKET_STOP_PRE, |
| SOCKET_STOP_PRE_SIGTERM, |
| SOCKET_STOP_PRE_SIGKILL, |
| SOCKET_STOP_POST, |
| SOCKET_FINAL_SIGTERM, |
| SOCKET_FINAL_SIGKILL)) { |
| |
| s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
| socket_unwatch_control_pid(s); |
| s->control_command = NULL; |
| s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
| } |
| |
| if (state != SOCKET_LISTENING) |
| socket_unwatch_fds(s); |
| |
| if (!IN_SET(state, |
| SOCKET_START_CHOWN, |
| SOCKET_START_POST, |
| SOCKET_LISTENING, |
| SOCKET_RUNNING, |
| SOCKET_STOP_PRE, |
| SOCKET_STOP_PRE_SIGTERM, |
| SOCKET_STOP_PRE_SIGKILL)) |
| socket_close_fds(s); |
| |
| if (state != old_state) |
| log_unit_debug(UNIT(s), "Changed %s -> %s", 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); |
| } |
| |
| static int socket_coldplug(Unit *u) { |
| Socket *s = SOCKET(u); |
| int r; |
| |
| assert(s); |
| assert(s->state == SOCKET_DEAD); |
| |
| if (s->deserialized_state == s->state) |
| return 0; |
| |
| if (IN_SET(s->deserialized_state, |
| SOCKET_START_PRE, |
| SOCKET_START_CHOWN, |
| SOCKET_START_POST, |
| SOCKET_STOP_PRE, |
| SOCKET_STOP_PRE_SIGTERM, |
| SOCKET_STOP_PRE_SIGKILL, |
| SOCKET_STOP_POST, |
| SOCKET_FINAL_SIGTERM, |
| SOCKET_FINAL_SIGKILL)) { |
| |
| if (s->control_pid <= 0) |
| return -EBADMSG; |
| |
| r = unit_watch_pid(UNIT(s), s->control_pid); |
| if (r < 0) |
| return r; |
| |
| r = socket_arm_timer(s); |
| if (r < 0) |
| return r; |
| } |
| |
| if (IN_SET(s->deserialized_state, |
| SOCKET_START_CHOWN, |
| SOCKET_START_POST, |
| SOCKET_LISTENING, |
| SOCKET_RUNNING, |
| SOCKET_STOP_PRE, |
| SOCKET_STOP_PRE_SIGTERM, |
| SOCKET_STOP_PRE_SIGKILL)) { |
| r = socket_open_fds(s); |
| if (r < 0) |
| return r; |
| } |
| |
| 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; |
| } |
| |
| static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { |
| _cleanup_free_ char **argv = NULL; |
| pid_t pid; |
| int r; |
| ExecParameters exec_params = { |
| .apply_permissions = true, |
| .apply_chroot = true, |
| .apply_tty_stdin = true, |
| .bus_endpoint_fd = -1, |
| }; |
| |
| assert(s); |
| assert(c); |
| assert(_pid); |
| |
| (void) unit_realize_cgroup(UNIT(s)); |
| if (s->reset_cpu_usage) { |
| (void) unit_reset_cpu_usage(UNIT(s)); |
| s->reset_cpu_usage = false; |
| } |
| |
| r = unit_setup_exec_runtime(UNIT(s)); |
| if (r < 0) |
| goto fail; |
| |
| r = socket_arm_timer(s); |
| if (r < 0) |
| goto fail; |
| |
| r = unit_full_printf_strv(UNIT(s), c->argv, &argv); |
| if (r < 0) |
| goto fail; |
| |
| exec_params.argv = argv; |
| exec_params.environment = UNIT(s)->manager->environment; |
| exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn; |
| exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported; |
| exec_params.cgroup_path = UNIT(s)->cgroup_path; |
| exec_params.cgroup_delegate = s->cgroup_context.delegate; |
| exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager); |
| |
| r = exec_spawn(UNIT(s), |
| c, |
| &s->exec_context, |
| &exec_params, |
| s->exec_runtime, |
| &pid); |
| if (r < 0) |
| goto fail; |
| |
| r = unit_watch_pid(UNIT(s), pid); |
| if (r < 0) |
| /* FIXME: we need to do something here */ |
| goto fail; |
| |
| *_pid = pid; |
| return 0; |
| |
| fail: |
| s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
| return r; |
| } |
| |
| static int socket_chown(Socket *s, pid_t *_pid) { |
| pid_t pid; |
| int r; |
| |
| r = socket_arm_timer(s); |
| if (r < 0) |
| goto fail; |
| |
| /* We have to resolve the user 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) { |
| SocketPort *p; |
| uid_t uid = UID_INVALID; |
| gid_t gid = GID_INVALID; |
| int ret; |
| |
| (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); |
| (void) ignore_signals(SIGPIPE, -1); |
| log_forget_fds(); |
| |
| if (!isempty(s->user)) { |
| const char *user = s->user; |
| |
| r = get_user_creds(&user, &uid, &gid, NULL, NULL); |
| if (r < 0) { |
| ret = EXIT_USER; |
| goto fail_child; |
| } |
| } |
| |
| if (!isempty(s->group)) { |
| const char *group = s->group; |
| |
| r = get_group_creds(&group, &gid); |
| if (r < 0) { |
| ret = EXIT_GROUP; |
| goto fail_child; |
| } |
| } |
| |
| LIST_FOREACH(port, p, s->ports) { |
| const char *path = NULL; |
| |
| if (p->type == SOCKET_SOCKET) |
| path = socket_address_get_path(&p->address); |
| else if (p->type == SOCKET_FIFO) |
| path = p->path; |
| |
| if (!path) |
| continue; |
| |
| if (chown(path, uid, gid) < 0) { |
| r = -errno; |
| ret = EXIT_CHOWN; |
| goto fail_child; |
| } |
| } |
| |
| _exit(0); |
| |
| fail_child: |
| log_open(); |
| log_error_errno(r, "Failed to chown socket at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD)); |
| |
| _exit(ret); |
| } |
| |
| r = unit_watch_pid(UNIT(s), pid); |
| if (r < 0) |
| goto fail; |
| |
| *_pid = pid; |
| return 0; |
| |
| fail: |
| s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
| return r; |
| } |
| |
| static void socket_enter_dead(Socket *s, SocketResult f) { |
| assert(s); |
| |
| if (f != SOCKET_SUCCESS) |
| s->result = f; |
| |
| exec_runtime_destroy(s->exec_runtime); |
| s->exec_runtime = exec_runtime_unref(s->exec_runtime); |
| |
| exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager)); |
| |
| socket_set_state(s, s->result != SOCKET_SUCCESS ? SOCKET_FAILED : SOCKET_DEAD); |
| } |
| |
| static void socket_enter_signal(Socket *s, SocketState state, SocketResult f); |
| |
| static void socket_enter_stop_post(Socket *s, SocketResult f) { |
| int r; |
| assert(s); |
| |
| if (f != SOCKET_SUCCESS) |
| s->result = f; |
| |
| socket_unwatch_control_pid(s); |
| s->control_command_id = SOCKET_EXEC_STOP_POST; |
| s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]; |
| |
| if (s->control_command) { |
| r = socket_spawn(s, s->control_command, &s->control_pid); |
| if (r < 0) |
| goto fail; |
| |
| socket_set_state(s, SOCKET_STOP_POST); |
| } else |
| socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); |
| |
| return; |
| |
| fail: |
| log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); |
| socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { |
| int r; |
| |
| assert(s); |
| |
| if (f != SOCKET_SUCCESS) |
| s->result = f; |
| |
| r = unit_kill_context( |
| UNIT(s), |
| &s->kill_context, |
| (state != SOCKET_STOP_PRE_SIGTERM && state != SOCKET_FINAL_SIGTERM) ? |
| KILL_KILL : KILL_TERMINATE, |
| -1, |
| s->control_pid, |
| false); |
| if (r < 0) |
| goto fail; |
| |
| if (r > 0) { |
| r = socket_arm_timer(s); |
| if (r < 0) |
| goto fail; |
| |
| socket_set_state(s, state); |
| } else if (state == SOCKET_STOP_PRE_SIGTERM) |
| socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_SUCCESS); |
| else if (state == SOCKET_STOP_PRE_SIGKILL) |
| socket_enter_stop_post(s, SOCKET_SUCCESS); |
| else if (state == SOCKET_FINAL_SIGTERM) |
| socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_SUCCESS); |
| else |
| socket_enter_dead(s, SOCKET_SUCCESS); |
| |
| return; |
| |
| fail: |
| log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); |
| |
| if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) |
| socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
| else |
| socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_stop_pre(Socket *s, SocketResult f) { |
| int r; |
| assert(s); |
| |
| if (f != SOCKET_SUCCESS) |
| s->result = f; |
| |
| socket_unwatch_control_pid(s); |
| s->control_command_id = SOCKET_EXEC_STOP_PRE; |
| s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]; |
| |
| if (s->control_command) { |
| r = socket_spawn(s, s->control_command, &s->control_pid); |
| if (r < 0) |
| goto fail; |
| |
| socket_set_state(s, SOCKET_STOP_PRE); |
| } else |
| socket_enter_stop_post(s, SOCKET_SUCCESS); |
| |
| return; |
| |
| fail: |
| log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-pre' task: %m"); |
| socket_enter_stop_post(s, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_listening(Socket *s) { |
| int r; |
| assert(s); |
| |
| r = socket_watch_fds(s); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
| goto fail; |
| } |
| |
| socket_set_state(s, SOCKET_LISTENING); |
| return; |
| |
| fail: |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_start_post(Socket *s) { |
| int r; |
| assert(s); |
| |
| socket_unwatch_control_pid(s); |
| s->control_command_id = SOCKET_EXEC_START_POST; |
| s->control_command = s->exec_command[SOCKET_EXEC_START_POST]; |
| |
| if (s->control_command) { |
| r = socket_spawn(s, s->control_command, &s->control_pid); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); |
| goto fail; |
| } |
| |
| socket_set_state(s, SOCKET_START_POST); |
| } else |
| socket_enter_listening(s); |
| |
| return; |
| |
| fail: |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_start_chown(Socket *s) { |
| int r; |
| |
| assert(s); |
| |
| r = socket_open_fds(s); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
| goto fail; |
| } |
| |
| if (!isempty(s->user) || !isempty(s->group)) { |
| |
| socket_unwatch_control_pid(s); |
| s->control_command_id = SOCKET_EXEC_START_CHOWN; |
| s->control_command = NULL; |
| |
| r = socket_chown(s, &s->control_pid); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to fork 'start-chown' task: %m"); |
| goto fail; |
| } |
| |
| socket_set_state(s, SOCKET_START_CHOWN); |
| } else |
| socket_enter_start_post(s); |
| |
| return; |
| |
| fail: |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_start_pre(Socket *s) { |
| int r; |
| assert(s); |
| |
| socket_unwatch_control_pid(s); |
| s->control_command_id = SOCKET_EXEC_START_PRE; |
| s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]; |
| |
| if (s->control_command) { |
| r = socket_spawn(s, s->control_command, &s->control_pid); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); |
| goto fail; |
| } |
| |
| socket_set_state(s, SOCKET_START_PRE); |
| } else |
| socket_enter_start_chown(s); |
| |
| return; |
| |
| fail: |
| socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static void socket_enter_running(Socket *s, int cfd) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| int r; |
| |
| assert(s); |
| |
| /* We don't take connections anymore if we are supposed to |
| * shut down anyway */ |
| if (unit_stop_pending(UNIT(s))) { |
| |
| log_unit_debug(UNIT(s), "Suppressing connection request since unit stop is scheduled."); |
| |
| if (cfd >= 0) |
| safe_close(cfd); |
| else { |
| /* Flush all sockets by closing and reopening them */ |
| socket_close_fds(s); |
| |
| r = socket_open_fds(s); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to listen on sockets: %m"); |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| return; |
| } |
| |
| r = socket_watch_fds(s); |
| if (r < 0) { |
| log_unit_warning_errno(UNIT(s), r, "Failed to watch sockets: %m"); |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| } |
| } |
| |
| return; |
| } |
| |
| if (cfd < 0) { |
| Iterator i; |
| Unit *other; |
| bool pending = false; |
| |
| /* If there's already a start pending don't bother to |
| * do anything */ |
| SET_FOREACH(other, UNIT(s)->dependencies[UNIT_TRIGGERS], i) |
| if (unit_active_or_pending(other)) { |
| pending = true; |
| break; |
| } |
| |
| if (!pending) { |
| if (!UNIT_ISSET(s->service)) { |
| log_unit_error(UNIT(s), "Service to activate vanished, refusing activation."); |
| r = -ENOENT; |
| goto fail; |
| } |
| |
| r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT_DEREF(s->service), JOB_REPLACE, true, &error, NULL); |
| if (r < 0) |
| goto fail; |
| } |
| |
| socket_set_state(s, SOCKET_RUNNING); |
| } else { |
| _cleanup_free_ char *prefix = NULL, *instance = NULL, *name = NULL; |
| Service *service; |
| |
| if (s->n_connections >= s->max_connections) { |
| log_unit_warning(UNIT(s), "Too many incoming connections (%u)", s->n_connections); |
| safe_close(cfd); |
| return; |
| } |
| |
| r = socket_instantiate_service(s); |
| if (r < 0) |
| goto fail; |
| |
| r = instance_from_socket(cfd, s->n_accepted, &instance); |
| if (r < 0) { |
| if (r != -ENOTCONN) |
| goto fail; |
| |
| /* ENOTCONN is legitimate if TCP RST was received. |
| * This connection is over, but the socket unit lives on. */ |
| safe_close(cfd); |
| return; |
| } |
| |
| r = unit_name_to_prefix(UNIT(s)->id, &prefix); |
| if (r < 0) |
| goto fail; |
| |
| r = unit_name_build(prefix, instance, ".service", &name); |
| if (r < 0) |
| goto fail; |
| |
| r = unit_add_name(UNIT_DEREF(s->service), name); |
| if (r < 0) |
| goto fail; |
| |
| service = SERVICE(UNIT_DEREF(s->service)); |
| unit_ref_unset(&s->service); |
| s->n_accepted ++; |
| |
| UNIT(service)->no_gc = false; |
| |
| unit_choose_id(UNIT(service), name); |
| |
| r = service_set_socket_fd(service, cfd, s, s->selinux_context_from_net); |
| if (r < 0) |
| goto fail; |
| |
| cfd = -1; |
| s->n_connections ++; |
| |
| r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(service), JOB_REPLACE, true, &error, NULL); |
| if (r < 0) |
| goto fail; |
| |
| /* Notify clients about changed counters */ |
| unit_add_to_dbus_queue(UNIT(s)); |
| } |
| |
| return; |
| |
| fail: |
| log_unit_warning(UNIT(s), "Failed to queue service startup job (Maybe the service file is missing or not a %s unit?): %s", |
| cfd >= 0 ? "template" : "non-template", |
| bus_error_message(&error, r)); |
| |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| safe_close(cfd); |
| } |
| |
| static void socket_run_next(Socket *s) { |
| int r; |
| |
| assert(s); |
| assert(s->control_command); |
| assert(s->control_command->command_next); |
| |
| socket_unwatch_control_pid(s); |
| |
| s->control_command = s->control_command->command_next; |
| |
| r = socket_spawn(s, s->control_command, &s->control_pid); |
| if (r < 0) |
| goto fail; |
| |
| return; |
| |
| fail: |
| log_unit_warning_errno(UNIT(s), r, "Failed to run next task: %m"); |
| |
| if (s->state == SOCKET_START_POST) |
| socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); |
| else if (s->state == SOCKET_STOP_POST) |
| socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); |
| else |
| socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); |
| } |
| |
| static int socket_start(Unit *u) { |
| Socket *s = SOCKET(u); |
| |
| assert(s); |
| |
| /* We cannot fulfill this request right now, try again later |
| * please! */ |
| if (IN_SET(s->state, |
| SOCKET_STOP_PRE, |
| SOCKET_STOP_PRE_SIGKILL, |
| SOCKET_STOP_PRE_SIGTERM, |
| SOCKET_STOP_POST, |
| SOCKET_FINAL_SIGTERM, |
| SOCKET_FINAL_SIGKILL)) |
| return -EAGAIN; |
| |
| /* Already on it! */ |
| if (IN_SET(s->state, |
| SOCKET_START_PRE, |
| SOCKET_START_CHOWN, |
| SOCKET_START_POST)) |
| return 0; |
| |
| /* Cannot run this without the service being around */ |
| if (UNIT_ISSET(s->service)) { |
| Service *service; |
| |
| service = SERVICE(UNIT_DEREF(s->service)); |
| |
| if (UNIT(service)->load_state != UNIT_LOADED) { |
| log_unit_error(u, "Socket service %s not loaded, refusing.", UNIT(service)->id); |
| return -ENOENT; |
| } |
| |
| /* If the service is already active we cannot start the |
| * socket */ |
| if (service->state != SERVICE_DEAD && |
| service->state != SERVICE_FAILED && |
| service->state != SERVICE_AUTO_RESTART) { |
| log_unit_error(u, "Socket service %s already active, refusing.", UNIT(service)->id); |
| return -EBUSY; |
| } |
| } |
| |
| assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED); |
| |
| s->result = SOCKET_SUCCESS; |
| s->reset_cpu_usage = true; |
| |
| socket_enter_start_pre(s); |
| |
| return 1; |
| } |
| |
| static int socket_stop(Unit *u) { |
| Socket *s = SOCKET(u); |
| |
| assert(s); |
| |
| /* Already on it */ |
| if (IN_SET(s->state, |
| SOCKET_STOP_PRE, |
| SOCKET_STOP_PRE_SIGTERM, |
| SOCKET_STOP_PRE_SIGKILL, |
| SOCKET_STOP_POST, |
| SOCKET_FINAL_SIGTERM, |
| SOCKET_FINAL_SIGKILL)) |
| return 0; |
| |
| /* If there's already something running we go directly into |
| * kill mode. */ |
| if (IN_SET(s->state, |
| SOCKET_START_PRE, |
| SOCKET_START_CHOWN, |
| SOCKET_START_POST)) { |
| socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_SUCCESS); |
| return -EAGAIN; |
| } |
| |
| assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING); |
| |
| socket_enter_stop_pre(s, SOCKET_SUCCESS); |
| return 1; |
| } |
| |
| static int socket_serialize(Unit *u, FILE *f, FDSet *fds) { |
| Socket *s = SOCKET(u); |
| SocketPort *p; |
| int r; |
| |
| assert(u); |
| assert(f); |
| assert(fds); |
| |
| unit_serialize_item(u, f, "state", socket_state_to_string(s->state)); |
| unit_serialize_item(u, f, "result", socket_result_to_string(s->result)); |
| unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted); |
| |
| if (s->control_pid > 0) |
| unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid); |
| |
| if (s->control_command_id >= 0) |
| unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id)); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| int copy; |
| |
| if (p->fd < 0) |
| continue; |
| |
| copy = fdset_put_dup(fds, p->fd); |
| if (copy < 0) |
| return copy; |
| |
| if (p->type == SOCKET_SOCKET) { |
| _cleanup_free_ char *t = NULL; |
| |
| r = socket_address_print(&p->address, &t); |
| if (r < 0) |
| return r; |
| |
| if (socket_address_family(&p->address) == AF_NETLINK) |
| unit_serialize_item_format(u, f, "netlink", "%i %s", copy, t); |
| else |
| unit_serialize_item_format(u, f, "socket", "%i %i %s", copy, p->address.type, t); |
| |
| } else if (p->type == SOCKET_SPECIAL) |
| unit_serialize_item_format(u, f, "special", "%i %s", copy, p->path); |
| else if (p->type == SOCKET_MQUEUE) |
| unit_serialize_item_format(u, f, "mqueue", "%i %s", copy, p->path); |
| else { |
| assert(p->type == SOCKET_FIFO); |
| unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { |
| Socket *s = SOCKET(u); |
| |
| assert(u); |
| assert(key); |
| assert(value); |
| |
| if (streq(key, "state")) { |
| SocketState state; |
| |
| state = socket_state_from_string(value); |
| if (state < 0) |
| log_unit_debug(u, "Failed to parse state value: %s", value); |
| else |
| s->deserialized_state = state; |
| } else if (streq(key, "result")) { |
| SocketResult f; |
| |
| f = socket_result_from_string(value); |
| if (f < 0) |
| log_unit_debug(u, "Failed to parse result value: %s", value); |
| else if (f != SOCKET_SUCCESS) |
| s->result = f; |
| |
| } else if (streq(key, "n-accepted")) { |
| unsigned k; |
| |
| if (safe_atou(value, &k) < 0) |
| log_unit_debug(u, "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_unit_debug(u, "Failed to parse control-pid value: %s", value); |
| else |
| s->control_pid = pid; |
| } else if (streq(key, "control-command")) { |
| SocketExecCommand id; |
| |
| id = socket_exec_command_from_string(value); |
| if (id < 0) |
| log_unit_debug(u, "Failed to parse exec-command value: %s", value); |
| else { |
| s->control_command_id = id; |
| s->control_command = s->exec_command[id]; |
| } |
| } else if (streq(key, "fifo")) { |
| int fd, skip = 0; |
| SocketPort *p; |
| |
| if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) |
| log_unit_debug(u, "Failed to parse fifo value: %s", value); |
| else { |
| |
| LIST_FOREACH(port, p, s->ports) |
| if (p->type == SOCKET_FIFO && |
| path_equal_or_files_same(p->path, value+skip)) |
| break; |
| |
| if (p) { |
| safe_close(p->fd); |
| p->fd = fdset_remove(fds, fd); |
| } |
| } |
| |
| } else if (streq(key, "special")) { |
| int fd, skip = 0; |
| SocketPort *p; |
| |
| if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) |
| log_unit_debug(u, "Failed to parse special value: %s", value); |
| else { |
| |
| LIST_FOREACH(port, p, s->ports) |
| if (p->type == SOCKET_SPECIAL && |
| path_equal_or_files_same(p->path, value+skip)) |
| break; |
| |
| if (p) { |
| safe_close(p->fd); |
| p->fd = fdset_remove(fds, fd); |
| } |
| } |
| |
| } else if (streq(key, "mqueue")) { |
| int fd, skip = 0; |
| SocketPort *p; |
| |
| if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) |
| log_unit_debug(u, "Failed to parse mqueue value: %s", value); |
| else { |
| |
| LIST_FOREACH(port, p, s->ports) |
| if (p->type == SOCKET_MQUEUE && |
| streq(p->path, value+skip)) |
| break; |
| |
| if (p) { |
| safe_close(p->fd); |
| p->fd = fdset_remove(fds, fd); |
| } |
| } |
| |
| } else if (streq(key, "socket")) { |
| int fd, type, skip = 0; |
| SocketPort *p; |
| |
| if (sscanf(value, "%i %i %n", &fd, &type, &skip) < 2 || fd < 0 || type < 0 || !fdset_contains(fds, fd)) |
| log_unit_debug(u, "Failed to parse socket value: %s", value); |
| else { |
| |
| LIST_FOREACH(port, p, s->ports) |
| if (socket_address_is(&p->address, value+skip, type)) |
| break; |
| |
| if (p) { |
| safe_close(p->fd); |
| p->fd = fdset_remove(fds, fd); |
| } |
| } |
| |
| } else if (streq(key, "netlink")) { |
| int fd, skip = 0; |
| SocketPort *p; |
| |
| if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd)) |
| log_unit_debug(u, "Failed to parse socket value: %s", value); |
| else { |
| |
| LIST_FOREACH(port, p, s->ports) |
| if (socket_address_is_netlink(&p->address, value+skip)) |
| break; |
| |
| if (p) { |
| safe_close(p->fd); |
| p->fd = fdset_remove(fds, fd); |
| } |
| } |
| } else |
| log_unit_debug(UNIT(s), "Unknown serialization key: %s", key); |
| |
| return 0; |
| } |
| |
| static int socket_distribute_fds(Unit *u, FDSet *fds) { |
| Socket *s = SOCKET(u); |
| SocketPort *p; |
| |
| assert(u); |
| |
| LIST_FOREACH(port, p, s->ports) { |
| Iterator i; |
| int fd; |
| |
| if (p->type != SOCKET_SOCKET) |
| continue; |
| |
| if (p->fd >= 0) |
| continue; |
| |
| FDSET_FOREACH(fd, fds, i) { |
| if (socket_address_matches_fd(&p->address, fd)) { |
| p->fd = fdset_remove(fds, fd); |
| s->deserialized_state = SOCKET_LISTENING; |
| break; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| _pure_ static UnitActiveState socket_active_state(Unit *u) { |
| assert(u); |
| |
| return state_translation_table[SOCKET(u)->state]; |
| } |
| |
| _pure_ static const char *socket_sub_state_to_string(Unit *u) { |
| assert(u); |
| |
| return socket_state_to_string(SOCKET(u)->state); |
| } |
| |
| const char* socket_port_type_to_string(SocketPort *p) { |
| |
| assert(p); |
| |
| switch (p->type) { |
| |
| case SOCKET_SOCKET: |
| |
| switch (p->address.type) { |
| |
| case SOCK_STREAM: |
| return "Stream"; |
| |
| case SOCK_DGRAM: |
| return "Datagram"; |
| |
| case SOCK_SEQPACKET: |
| return "SequentialPacket"; |
| |
| case SOCK_RAW: |
| if (socket_address_family(&p->address) == AF_NETLINK) |
| return "Netlink"; |
| |
| default: |
| return NULL; |
| } |
| |
| case SOCKET_SPECIAL: |
| return "Special"; |
| |
| case SOCKET_MQUEUE: |
| return "MessageQueue"; |
| |
| case SOCKET_FIFO: |
| return "FIFO"; |
| |
| default: |
| return NULL; |
| } |
| } |
| |
| _pure_ static bool socket_check_gc(Unit *u) { |
| Socket *s = SOCKET(u); |
| |
| assert(u); |
| |
| return s->n_connections > 0; |
| } |
| |
| static int socket_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
| SocketPort *p = userdata; |
| int cfd = -1; |
| |
| assert(p); |
| assert(fd >= 0); |
| |
| if (p->socket->state != SOCKET_LISTENING) |
| return 0; |
| |
| log_unit_debug(UNIT(p->socket), "Incoming traffic"); |
| |
| if (revents != EPOLLIN) { |
| |
| if (revents & EPOLLHUP) |
| log_unit_error(UNIT(p->socket), "Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that."); |
| else |
| log_unit_error(UNIT(p->socket), "Got unexpected poll event (0x%x) on socket.", revents); |
| |
| goto fail; |
| } |
| |
| if (p->socket->accept && |
| p->type == SOCKET_SOCKET && |
| socket_address_can_accept(&p->address)) { |
| |
| for (;;) { |
| |
| cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK); |
| if (cfd < 0) { |
| |
| if (errno == EINTR) |
| continue; |
| |
| log_unit_error_errno(UNIT(p->socket), errno, "Failed to accept socket: %m"); |
| goto fail; |
| } |
| |
| break; |
| } |
| |
| socket_apply_socket_options(p->socket, cfd); |
| } |
| |
| socket_enter_running(p->socket, cfd); |
| return 0; |
| |
| fail: |
| socket_enter_stop_pre(p->socket, SOCKET_FAILURE_RESOURCES); |
| return 0; |
| } |
| |
| static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
| Socket *s = SOCKET(u); |
| SocketResult f; |
| |
| assert(s); |
| assert(pid >= 0); |
| |
| if (pid != s->control_pid) |
| return; |
| |
| s->control_pid = 0; |
| |
| if (is_clean_exit(code, status, NULL)) |
| f = SOCKET_SUCCESS; |
| else if (code == CLD_EXITED) |
| f = SOCKET_FAILURE_EXIT_CODE; |
| else if (code == CLD_KILLED) |
| f = SOCKET_FAILURE_SIGNAL; |
| else if (code == CLD_DUMPED) |
| f = SOCKET_FAILURE_CORE_DUMP; |
| else |
| assert_not_reached("Unknown sigchld code"); |
| |
| if (s->control_command) { |
| exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
| |
| if (s->control_command->ignore) |
| f = SOCKET_SUCCESS; |
| } |
| |
| log_unit_full(u, f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, |
| "Control process exited, code=%s status=%i", |
| sigchld_code_to_string(code), status); |
| |
| if (f != SOCKET_SUCCESS) |
| s->result = f; |
| |
| if (s->control_command && |
| s->control_command->command_next && |
| f == SOCKET_SUCCESS) { |
| |
| log_unit_debug(u, "Running next command for state %s", socket_state_to_string(s->state)); |
| socket_run_next(s); |
| } else { |
| s->control_command = NULL; |
| s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID; |
| |
| /* No further commands for this step, so let's figure |
| * out what to do next */ |
| |
| log_unit_debug(u, "Got final SIGCHLD for state %s", socket_state_to_string(s->state)); |
| |
| switch (s->state) { |
| |
| case SOCKET_START_PRE: |
| if (f == SOCKET_SUCCESS) |
| socket_enter_start_chown(s); |
| else |
| socket_enter_signal(s, SOCKET_FINAL_SIGTERM, f); |
| break; |
| |
| case SOCKET_START_CHOWN: |
| if (f == SOCKET_SUCCESS) |
| socket_enter_start_post(s); |
| else |
| socket_enter_stop_pre(s, f); |
| break; |
| |
| case SOCKET_START_POST: |
| if (f == SOCKET_SUCCESS) |
| socket_enter_listening(s); |
| else |
| socket_enter_stop_pre(s, f); |
| break; |
| |
| case SOCKET_STOP_PRE: |
| case SOCKET_STOP_PRE_SIGTERM: |
| case SOCKET_STOP_PRE_SIGKILL: |
| socket_enter_stop_post(s, f); |
| break; |
| |
| case SOCKET_STOP_POST: |
| case SOCKET_FINAL_SIGTERM: |
| case SOCKET_FINAL_SIGKILL: |
| socket_enter_dead(s, 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 socket_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
| Socket *s = SOCKET(userdata); |
| |
| assert(s); |
| assert(s->timer_event_source == source); |
| |
| switch (s->state) { |
| |
| case SOCKET_START_PRE: |
| log_unit_warning(UNIT(s), "Starting timed out. Terminating."); |
| socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
| break; |
| |
| case SOCKET_START_CHOWN: |
| case SOCKET_START_POST: |
| log_unit_warning(UNIT(s), "Starting timed out. Stopping."); |
| socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); |
| break; |
| |
| case SOCKET_STOP_PRE: |
| log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); |
| socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
| break; |
| |
| case SOCKET_STOP_PRE_SIGTERM: |
| if (s->kill_context.send_sigkill) { |
| log_unit_warning(UNIT(s), "Stopping timed out. Killing."); |
| socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
| } else { |
| log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL. Ignoring."); |
| socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
| } |
| break; |
| |
| case SOCKET_STOP_PRE_SIGKILL: |
| log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); |
| socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); |
| break; |
| |
| case SOCKET_STOP_POST: |
| log_unit_warning(UNIT(s), "Stopping timed out (2). Terminating."); |
| socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); |
| break; |
| |
| case SOCKET_FINAL_SIGTERM: |
| if (s->kill_context.send_sigkill) { |
| log_unit_warning(UNIT(s), "Stopping timed out (2). Killing."); |
| socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); |
| } else { |
| log_unit_warning(UNIT(s), "Stopping timed out (2). Skipping SIGKILL. Ignoring."); |
| socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
| } |
| break; |
| |
| case SOCKET_FINAL_SIGKILL: |
| log_unit_warning(UNIT(s), "Still around after SIGKILL (2). Entering failed mode."); |
| socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); |
| break; |
| |
| default: |
| assert_not_reached("Timeout at wrong time."); |
| } |
| |
| return 0; |
| } |
| |
| int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) { |
| int *rfds; |
| unsigned rn_fds, k; |
| SocketPort *p; |
| |
| assert(s); |
| assert(fds); |
| assert(n_fds); |
| |
| /* Called from the service code for requesting our fds */ |
| |
| rn_fds = 0; |
| LIST_FOREACH(port, p, s->ports) |
| if (p->fd >= 0) |
| rn_fds++; |
| |
| if (rn_fds <= 0) { |
| *fds = NULL; |
| *n_fds = 0; |
| return 0; |
| } |
| |
| rfds = new(int, rn_fds); |
| if (!rfds) |
| return -ENOMEM; |
| |
| k = 0; |
| LIST_FOREACH(port, p, s->ports) |
| if (p->fd >= 0) |
| rfds[k++] = p->fd; |
| |
| assert(k == rn_fds); |
| |
| *fds = rfds; |
| *n_fds = rn_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); |
| |
| /* The service is dead. Dang! |
| * |
| * This is strictly for one-instance-for-all-connections |
| * services. */ |
| |
| if (s->state == SOCKET_RUNNING) { |
| log_unit_debug(UNIT(s), "Got notified about service death (failed permanently: %s)", yes_no(failed_permanent)); |
| if (failed_permanent) |
| socket_enter_stop_pre(s, SOCKET_FAILURE_SERVICE_FAILED_PERMANENT); |
| else |
| socket_enter_listening(s); |
| } |
| } |
| |
| void socket_connection_unref(Socket *s) { |
| assert(s); |
| |
| /* The service is dead. Yay! |
| * |
| * This is strictly for one-instance-per-connection |
| * services. */ |
| |
| assert(s->n_connections > 0); |
| s->n_connections--; |
| |
| log_unit_debug(UNIT(s), "One connection closed, %u left.", s->n_connections); |
| } |
| |
| static void socket_trigger_notify(Unit *u, Unit *other) { |
| Socket *s = SOCKET(u); |
| Service *se; |
| |
| assert(u); |
| assert(other); |
| |
| /* Don't propagate state changes from the service if we are |
| already down or accepting connections */ |
| if ((s->state != SOCKET_RUNNING && |
| s->state != SOCKET_LISTENING) || |
| s->accept) |
| return; |
| |
| if (other->load_state != UNIT_LOADED || |
| other->type != UNIT_SERVICE) |
| return; |
| |
| se = SERVICE(other); |
| |
| if (se->state == SERVICE_FAILED) |
| socket_notify_service_dead(s, se->result == SERVICE_FAILURE_START_LIMIT); |
| |
| if (se->state == SERVICE_DEAD || |
| se->state == SERVICE_FINAL_SIGTERM || |
| se->state == SERVICE_FINAL_SIGKILL || |
| se->state == SERVICE_AUTO_RESTART) |
| socket_notify_service_dead(s, false); |
| |
| if (se->state == SERVICE_RUNNING) |
| socket_set_state(s, SOCKET_RUNNING); |
| } |
| |
| static int socket_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
| return unit_kill_common(u, who, signo, -1, SOCKET(u)->control_pid, error); |
| } |
| |
| static int socket_get_timeout(Unit *u, uint64_t *timeout) { |
| Socket *s = SOCKET(u); |
| int r; |
| |
| if (!s->timer_event_source) |
| return 0; |
| |
| r = sd_event_source_get_time(s->timer_event_source, timeout); |
| if (r < 0) |
| return r; |
| |
| return 1; |
| } |
| |
| static const char* const socket_state_table[_SOCKET_STATE_MAX] = { |
| [SOCKET_DEAD] = "dead", |
| [SOCKET_START_PRE] = "start-pre", |
| [SOCKET_START_CHOWN] = "start-chown", |
| [SOCKET_START_POST] = "start-post", |
| [SOCKET_LISTENING] = "listening", |
| [SOCKET_RUNNING] = "running", |
| [SOCKET_STOP_PRE] = "stop-pre", |
| [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm", |
| [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill", |
| [SOCKET_STOP_POST] = "stop-post", |
| [SOCKET_FINAL_SIGTERM] = "final-sigterm", |
| [SOCKET_FINAL_SIGKILL] = "final-sigkill", |
| [SOCKET_FAILED] = "failed" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState); |
| |
| static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = { |
| [SOCKET_EXEC_START_PRE] = "StartPre", |
| [SOCKET_EXEC_START_CHOWN] = "StartChown", |
| [SOCKET_EXEC_START_POST] = "StartPost", |
| [SOCKET_EXEC_STOP_PRE] = "StopPre", |
| [SOCKET_EXEC_STOP_POST] = "StopPost" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand); |
| |
| static const char* const socket_result_table[_SOCKET_RESULT_MAX] = { |
| [SOCKET_SUCCESS] = "success", |
| [SOCKET_FAILURE_RESOURCES] = "resources", |
| [SOCKET_FAILURE_TIMEOUT] = "timeout", |
| [SOCKET_FAILURE_EXIT_CODE] = "exit-code", |
| [SOCKET_FAILURE_SIGNAL] = "signal", |
| [SOCKET_FAILURE_CORE_DUMP] = "core-dump", |
| [SOCKET_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(socket_result, SocketResult); |
| |
| const UnitVTable socket_vtable = { |
| .object_size = sizeof(Socket), |
| .exec_context_offset = offsetof(Socket, exec_context), |
| .cgroup_context_offset = offsetof(Socket, cgroup_context), |
| .kill_context_offset = offsetof(Socket, kill_context), |
| .exec_runtime_offset = offsetof(Socket, exec_runtime), |
| |
| .sections = |
| "Unit\0" |
| "Socket\0" |
| "Install\0", |
| .private_section = "Socket", |
| |
| .init = socket_init, |
| .done = socket_done, |
| .load = socket_load, |
| |
| .coldplug = socket_coldplug, |
| |
| .dump = socket_dump, |
| |
| .start = socket_start, |
| .stop = socket_stop, |
| |
| .kill = socket_kill, |
| |
| .get_timeout = socket_get_timeout, |
| |
| .serialize = socket_serialize, |
| .deserialize_item = socket_deserialize_item, |
| .distribute_fds = socket_distribute_fds, |
| |
| .active_state = socket_active_state, |
| .sub_state_to_string = socket_sub_state_to_string, |
| |
| .check_gc = socket_check_gc, |
| |
| .sigchld_event = socket_sigchld_event, |
| |
| .trigger_notify = socket_trigger_notify, |
| |
| .reset_failed = socket_reset_failed, |
| |
| .bus_vtable = bus_socket_vtable, |
| .bus_set_property = bus_socket_set_property, |
| .bus_commit_properties = bus_socket_commit_properties, |
| |
| .status_message_formats = { |
| /*.starting_stopping = { |
| [0] = "Starting socket %s...", |
| [1] = "Stopping socket %s...", |
| },*/ |
| .finished_start_job = { |
| [JOB_DONE] = "Listening on %s.", |
| [JOB_FAILED] = "Failed to listen on %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.", |
| }, |
| }, |
| }; |