diff options
Diffstat (limited to 'src/core/socket.c')
| -rw-r--r-- | src/core/socket.c | 2289 |
1 files changed, 0 insertions, 2289 deletions
diff --git a/src/core/socket.c b/src/core/socket.c deleted file mode 100644 index c0959815c1..0000000000 --- a/src/core/socket.c +++ /dev/null @@ -1,2289 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU 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/types.h> -#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 <mqueue.h> -#include <attr/xattr.h> - -#include "unit.h" -#include "socket.h" -#include "netinet/tcp.h" -#include "log.h" -#include "load-dropin.h" -#include "load-fragment.h" -#include "strv.h" -#include "mkdir.h" -#include "path-util.h" -#include "unit-name.h" -#include "unit-printf.h" -#include "dbus-socket.h" -#include "missing.h" -#include "special.h" -#include "bus-errors.h" -#include "label.h" -#include "exit-status.h" -#include "def.h" - -static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { - [SOCKET_DEAD] = UNIT_INACTIVE, - [SOCKET_START_PRE] = 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 void socket_init(Unit *u) { - Socket *s = SOCKET(u); - - assert(u); - assert(u->load_state == UNIT_STUB); - - s->backlog = SOMAXCONN; - s->timeout_usec = DEFAULT_TIMEOUT_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; - - exec_context_init(&s->exec_context); - s->exec_context.std_output = u->manager->default_std_output; - s->exec_context.std_error = u->manager->default_std_error; - kill_context_init(&s->kill_context); - - 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; -} - -static void socket_done(Unit *u) { - Socket *s = SOCKET(u); - SocketPort *p; - - assert(s); - - while ((p = s->ports)) { - LIST_REMOVE(SocketPort, port, s->ports, p); - - if (p->fd >= 0) { - unit_unwatch_fd(UNIT(s), &p->fd_watch); - close_nointr_nofail(p->fd); - } - - free(p->path); - free(p); - } - - exec_context_done(&s->exec_context); - 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); - - unit_unwatch_timer(u, &s->timer_watch); -} - -static int socket_instantiate_service(Socket *s) { - char *prefix, *name; - 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; - - assert(s->accept); - - if (!(prefix = unit_name_to_prefix(UNIT(s)->id))) - return -ENOMEM; - - r = asprintf(&name, "%s@%u.service", prefix, s->n_accepted); - free(prefix); - - if (r < 0) - return -ENOMEM; - - r = manager_load_unit(UNIT(s)->manager, name, NULL, NULL, &u); - free(name); - - if (r < 0) - return r; - -#ifdef HAVE_SYSV_COMPAT - if (SERVICE(u)->is_sysv) { - log_error("Using SysV services for socket activation is not supported. Refusing."); - return -ENOENT; - } -#endif - - 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_verify(Socket *s) { - assert(s); - - if (UNIT(s)->load_state != UNIT_LOADED) - return 0; - - if (!s->ports) { - log_error("%s lacks Listen setting. Refusing.", UNIT(s)->id); - return -EINVAL; - } - - if (s->accept && have_non_accept_socket(s)) { - log_error("%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("%s's MaxConnection setting too small. Refusing.", UNIT(s)->id); - return -EINVAL; - } - - if (s->accept && UNIT_DEREF(s->service)) { - log_error("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("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id); - return -EINVAL; - } - - return 0; -} - -static bool socket_needs_mount(Socket *s, const char *prefix) { - SocketPort *p; - - assert(s); - - LIST_FOREACH(port, p, s->ports) { - - if (p->type == SOCKET_SOCKET) { - if (socket_address_needs_mount(&p->address, prefix)) - return true; - } else if (p->type == SOCKET_FIFO || p->type == SOCKET_SPECIAL) { - if (path_startswith(p->path, prefix)) - return true; - } - } - - return false; -} - -int socket_add_one_mount_link(Socket *s, Mount *m) { - int r; - - assert(s); - assert(m); - - if (UNIT(s)->load_state != UNIT_LOADED || - UNIT(m)->load_state != UNIT_LOADED) - return 0; - - if (!socket_needs_mount(s, m->where)) - return 0; - - r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); - if (r < 0) - return r; - - return 0; -} - -static int socket_add_mount_links(Socket *s) { - Unit *other; - int r; - - assert(s); - - LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT]) { - r = socket_add_one_mount_link(s, MOUNT(other)); - if (r < 0) - return r; - } - - return 0; -} - -static int socket_add_device_link(Socket *s) { - char *t; - int r; - - assert(s); - - if (!s->bind_to_device) - 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; -} - -static int socket_add_default_dependencies(Socket *s) { - int r; - assert(s); - - if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) { - if ((r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0) - return r; - - if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0) - return r; - } - - return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); -} - -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_load(Unit *u) { - Socket *s = SOCKET(u); - 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; - - 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; - } - - if ((r = socket_add_mount_links(s)) < 0) - return r; - - if ((r = socket_add_device_link(s)) < 0) - return r; - - if (socket_has_exec(s)) - if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) - return r; - - if ((r = unit_add_default_cgroups(u)) < 0) - return r; - - if (UNIT(s)->default_dependencies) - if ((r = socket_add_default_dependencies(s)) < 0) - return r; - - r = unit_exec_context_defaults(u, &s->exec_context); - if (r < 0) - return r; - } - - return socket_verify(s); -} - -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) { - - 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; - - fprintf(f, - "%sSocket State: %s\n" - "%sResult: %s\n" - "%sBindIPv6Only: %s\n" - "%sBacklog: %u\n" - "%sSocketMode: %04o\n" - "%sDirectoryMode: %04o\n" - "%sKeepAlive: %s\n" - "%sFreeBind: %s\n" - "%sTransparent: %s\n" - "%sBroadcast: %s\n" - "%sPassCredentials: %s\n" - "%sPassSecurity: %s\n" - "%sTCPCongestion: %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->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)); - - if (s->control_pid > 0) - fprintf(f, - "%sControl PID: %lu\n", - prefix, (unsigned long) 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->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); - - 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); - } - - free(p2); -} - -static int instance_from_socket(int fd, unsigned nr, char **instance) { - socklen_t l; - char *r; - union { - struct sockaddr sa; - struct sockaddr_un un; - struct sockaddr_in in; - struct sockaddr_in6 in6; - struct sockaddr_storage storage; - } 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; - - l = sizeof(ucred); - if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0) - return -errno; - - if (asprintf(&r, - "%u-%lu-%lu", - nr, - (unsigned long) ucred.pid, - (unsigned long) ucred.uid) < 0) - return -ENOMEM; - - break; - } - - default: - assert_not_reached("Unhandled socket type."); - } - - *instance = r; - return 0; -} - -static void socket_close_fds(Socket *s) { - SocketPort *p; - - assert(s); - - LIST_FOREACH(port, p, s->ports) { - if (p->fd < 0) - continue; - - unit_unwatch_fd(UNIT(s), &p->fd_watch); - close_nointr_nofail(p->fd); - - /* One little note: we should never 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! */ - - p->fd = -1; - } -} - -static void socket_apply_socket_options(Socket *s, int fd) { - 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_warning("SO_KEEPALIVE failed: %m"); - } - - if (s->broadcast) { - int one = 1; - if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0) - log_warning("SO_BROADCAST failed: %m"); - } - - if (s->pass_cred) { - int one = 1; - if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) - log_warning("SO_PASSCRED failed: %m"); - } - - if (s->pass_sec) { - int one = 1; - if (setsockopt(fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)) < 0) - log_warning("SO_PASSSEC failed: %m"); - } - - if (s->priority >= 0) - if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &s->priority, sizeof(s->priority)) < 0) - log_warning("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_warning("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_warning("SO_SNDBUF failed: %m"); - } - - if (s->mark >= 0) - if (setsockopt(fd, SOL_SOCKET, SO_MARK, &s->mark, sizeof(s->mark)) < 0) - log_warning("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_warning("IP_TOS failed: %m"); - - if (s->ip_ttl >= 0) { - int r, 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_warning("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_warning("TCP_CONGESTION failed: %m"); - - if (s->smack_ip_in) - if (fsetxattr(fd, "security.SMACK64IPIN", s->smack_ip_in, strlen(s->smack_ip_in), 0) < 0) - log_error("fsetxattr(\"security.SMACK64IPIN\"): %m"); - - if (s->smack_ip_out) - if (fsetxattr(fd, "security.SMACK64IPOUT", s->smack_ip_out, strlen(s->smack_ip_out), 0) < 0) - log_error("fsetxattr(\"security.SMACK64IPOUT\"): %m"); -} - -static void socket_apply_fifo_options(Socket *s, int fd) { - assert(s); - assert(fd >= 0); - - if (s->pipe_size > 0) - if (fcntl(fd, F_SETPIPE_SZ, s->pipe_size) < 0) - log_warning("F_SETPIPE_SZ: %m"); - - if (s->smack) - if (fsetxattr(fd, "security.SMACK64", s->smack, strlen(s->smack), 0) < 0) - log_error("fsetxattr(\"security.SMACK64\"): %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 = label_context_set(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; - } - - label_context_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: - label_context_clear(); - - if (fd >= 0) - close_nointr_nofail(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); - - if ((fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 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: - if (fd >= 0) - close_nointr_nofail(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: - if (fd >= 0) - close_nointr_nofail(fd); - - return r; -} - -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) { - - if ((r = socket_instantiate_service(s)) < 0) - return r; - - if (UNIT_DEREF(s->service) && - SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]) { - r = label_get_create_label_from_exe(SERVICE(UNIT_DEREF(s->service))->exec_command[SERVICE_EXEC_START]->path, &label); - - if (r < 0) { - if (r != -EPERM) - return r; - } - } - - know_label = true; - } - - if ((r = socket_address_listen( - &p->address, - s->backlog, - s->bind_ipv6_only, - s->bind_to_device, - s->free_bind, - s->transparent, - s->directory_mode, - s->socket_mode, - label, - &p->fd)) < 0) - goto rollback; - - socket_apply_socket_options(s, p->fd); - - } else if (p->type == SOCKET_SPECIAL) { - - if ((r = special_address_create( - p->path, - &p->fd)) < 0) - goto rollback; - - } else if (p->type == SOCKET_FIFO) { - - if ((r = fifo_address_create( - p->path, - s->directory_mode, - s->socket_mode, - &p->fd)) < 0) - goto rollback; - - socket_apply_fifo_options(s, p->fd); - } else if (p->type == SOCKET_MQUEUE) { - - if ((r = mq_address_create( - p->path, - s->socket_mode, - s->mq_maxmsg, - s->mq_msgsize, - &p->fd)) < 0) - goto rollback; - } else - assert_not_reached("Unknown port type"); - } - - label_free(label); - return 0; - -rollback: - socket_close_fds(s); - label_free(label); - return r; -} - -static void socket_unwatch_fds(Socket *s) { - SocketPort *p; - - assert(s); - - LIST_FOREACH(port, p, s->ports) { - if (p->fd < 0) - continue; - - unit_unwatch_fd(UNIT(s), &p->fd_watch); - } -} - -static int socket_watch_fds(Socket *s) { - SocketPort *p; - int r; - - assert(s); - - LIST_FOREACH(port, p, s->ports) { - if (p->fd < 0) - continue; - - p->fd_watch.socket_accept = - s->accept && - p->type == SOCKET_SOCKET && - socket_address_can_accept(&p->address); - - if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0) - goto fail; - } - - return 0; - -fail: - 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 (state != SOCKET_START_PRE && - state != SOCKET_START_POST && - state != SOCKET_STOP_PRE && - state != SOCKET_STOP_PRE_SIGTERM && - state != SOCKET_STOP_PRE_SIGKILL && - state != SOCKET_STOP_POST && - state != SOCKET_FINAL_SIGTERM && - state != SOCKET_FINAL_SIGKILL) { - unit_unwatch_timer(UNIT(s), &s->timer_watch); - 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 (state != SOCKET_START_POST && - state != SOCKET_LISTENING && - state != SOCKET_RUNNING && - state != SOCKET_STOP_PRE && - state != SOCKET_STOP_PRE_SIGTERM && - state != SOCKET_STOP_PRE_SIGKILL) - socket_close_fds(s); - - if (state != old_state) - log_debug("%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); -} - -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) { - - 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->control_pid <= 0) - return -EBADMSG; - - if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0) - return r; - - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 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) - if ((r = socket_open_fds(s)) < 0) - return r; - - if (s->deserialized_state == SOCKET_LISTENING) - if ((r = socket_watch_fds(s)) < 0) - return r; - - socket_set_state(s, s->deserialized_state); - } - - return 0; -} - -static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { - pid_t pid; - int r; - char **argv; - - assert(s); - assert(c); - assert(_pid); - - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) - goto fail; - - if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) { - r = -ENOMEM; - goto fail; - } - - r = exec_spawn(c, - argv, - &s->exec_context, - NULL, 0, - UNIT(s)->manager->environment, - true, - true, - true, - UNIT(s)->manager->confirm_spawn, - UNIT(s)->cgroup_bondings, - UNIT(s)->cgroup_attributes, - NULL, - UNIT(s)->id, - NULL, - &pid); - - strv_free(argv); - if (r < 0) - goto fail; - - if ((r = unit_watch_pid(UNIT(s), pid)) < 0) - /* FIXME: we need to do something here */ - goto fail; - - *_pid = pid; - - return 0; - -fail: - unit_unwatch_timer(UNIT(s), &s->timer_watch); - - return r; -} - -static void socket_enter_dead(Socket *s, SocketResult f) { - assert(s); - - if (f != SOCKET_SUCCESS) - s->result = f; - - 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; - - if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) { - if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) - goto fail; - - socket_set_state(s, SOCKET_STOP_POST); - } else - socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_SUCCESS); - - return; - -fail: - log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r)); - socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_RESOURCES); -} - -static void socket_enter_signal(Socket *s, SocketState state, SocketResult f) { - int r; - Set *pid_set = NULL; - bool wait_for_exit = false; - - assert(s); - - if (f != SOCKET_SUCCESS) - s->result = f; - - if (s->kill_context.kill_mode != KILL_NONE) { - int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->kill_context.kill_signal : SIGKILL; - - if (s->control_pid > 0) { - if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH) - - log_warning("Failed to kill control process %li: %m", (long) s->control_pid); - else - wait_for_exit = true; - } - - if (s->kill_context.kill_mode == KILL_CONTROL_GROUP) { - - if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) { - r = -ENOMEM; - goto fail; - } - - /* Exclude the control pid from being killed via the cgroup */ - if (s->control_pid > 0) - if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) - goto fail; - - r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, false, pid_set, NULL); - if (r < 0) { - if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) - log_warning("Failed to kill control group: %s", strerror(-r)); - } else if (r > 0) - wait_for_exit = true; - - set_free(pid_set); - pid_set = NULL; - } - } - - if (wait_for_exit) { - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) - goto fail; - - socket_set_state(s, state); - } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) - socket_enter_stop_post(s, SOCKET_SUCCESS); - else - socket_enter_dead(s, SOCKET_SUCCESS); - - return; - -fail: - log_warning("%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); - else - socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); - - if (pid_set) - set_free(pid_set); -} - -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; - - if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) { - if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) - goto fail; - - socket_set_state(s, SOCKET_STOP_PRE); - } else - socket_enter_stop_post(s, SOCKET_SUCCESS); - - return; - -fail: - log_warning("%s failed to run 'stop-pre' task: %s", UNIT(s)->id, strerror(-r)); - 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_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r)); - 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); - - r = socket_open_fds(s); - if (r < 0) { - log_warning("%s failed to listen on sockets: %s", UNIT(s)->id, strerror(-r)); - goto fail; - } - - socket_unwatch_control_pid(s); - - s->control_command_id = SOCKET_EXEC_START_POST; - - 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("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r)); - 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_pre(Socket *s) { - int r; - assert(s); - - socket_unwatch_control_pid(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) - goto fail; - - socket_set_state(s, SOCKET_START_PRE); - } else - socket_enter_start_post(s); - - return; - -fail: - log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r)); - socket_enter_dead(s, SOCKET_FAILURE_RESOURCES); -} - -static void socket_enter_running(Socket *s, int cfd) { - int r; - DBusError error; - - assert(s); - dbus_error_init(&error); - - /* We don't take connections anymore if we are supposed to - * shut down anyway */ - if (unit_pending_inactive(UNIT(s))) { - log_debug("Suppressing connection request on %s since unit stop is scheduled.", UNIT(s)->id); - - if (cfd >= 0) - close_nointr_nofail(cfd); - else { - /* Flush all sockets by closing and reopening them */ - socket_close_fds(s); - - r = socket_watch_fds(s); - if (r < 0) { - log_warning("%s failed to watch sockets: %s", UNIT(s)->id, strerror(-r)); - socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); - } - } - - return; - } - - if (cfd < 0) { - Iterator i; - Unit *u; - 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_pending_active(u)) { - pending = true; - break; - } - - if (!pending) { - 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 { - char *prefix, *instance = NULL, *name; - Service *service; - - if (s->n_connections >= s->max_connections) { - log_warning("Too many incoming connections (%u)", s->n_connections); - close_nointr_nofail(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. */ - close_nointr_nofail(cfd); - return; - } - - prefix = unit_name_to_prefix(UNIT(s)->id); - if (!prefix) { - free(instance); - r = -ENOMEM; - goto fail; - } - - name = unit_name_build(prefix, instance, ".service"); - free(prefix); - free(instance); - - if (!name) { - r = -ENOMEM; - goto fail; - } - - r = unit_add_name(UNIT_DEREF(s->service), name); - if (r < 0) { - free(name); - 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); - free(name); - - r = service_set_socket_fd(service, cfd, s); - 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_warning("%s failed to queue socket startup job: %s", UNIT(s)->id, bus_error(&error, r)); - socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); - - if (cfd >= 0) - close_nointr_nofail(cfd); - - dbus_error_free(&error); -} - -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; - - if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) - goto fail; - - return; - -fail: - log_warning("%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); - 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 (s->state == SOCKET_STOP_PRE || - s->state == SOCKET_STOP_PRE_SIGKILL || - s->state == SOCKET_STOP_PRE_SIGTERM || - s->state == SOCKET_STOP_POST || - s->state == SOCKET_FINAL_SIGTERM || - s->state == SOCKET_FINAL_SIGKILL) - return -EAGAIN; - - if (s->state == SOCKET_START_PRE || - s->state == SOCKET_START_POST) - return 0; - - /* Cannot run this without the service being around */ - if (UNIT_DEREF(s->service)) { - Service *service; - - service = SERVICE(UNIT_DEREF(s->service)); - - if (UNIT(service)->load_state != UNIT_LOADED) { - log_error("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_error("Socket service %s already active, refusing.", UNIT(service)->id); - return -EBUSY; - } - -#ifdef HAVE_SYSV_COMPAT - if (service->is_sysv) { - log_error("Using SysV services for socket activation is not supported. Refusing."); - return -ENOENT; - } -#endif - } - - assert(s->state == SOCKET_DEAD || s->state == SOCKET_FAILED); - - s->result = SOCKET_SUCCESS; - socket_enter_start_pre(s); - return 0; -} - -static int socket_stop(Unit *u) { - Socket *s = SOCKET(u); - - assert(s); - - /* Already on it */ - if (s->state == SOCKET_STOP_PRE || - s->state == SOCKET_STOP_PRE_SIGTERM || - s->state == SOCKET_STOP_PRE_SIGKILL || - s->state == SOCKET_STOP_POST || - s->state == SOCKET_FINAL_SIGTERM || - s->state == SOCKET_FINAL_SIGKILL) - return 0; - - /* If there's already something running we go directly into - * kill mode. */ - if (s->state == SOCKET_START_PRE || - s->state == 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 0; -} - -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", "%lu", (unsigned long) 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; - - if ((copy = fdset_put_dup(fds, p->fd)) < 0) - return copy; - - if (p->type == SOCKET_SOCKET) { - char *t; - - if ((r = socket_address_print(&p->address, &t)) < 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); - free(t); - } else if (p->type == SOCKET_SPECIAL) - unit_serialize_item_format(u, f, "special", "%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); - assert(fds); - - if (streq(key, "state")) { - SocketState state; - - if ((state = socket_state_from_string(value)) < 0) - log_debug("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_debug("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_debug("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("Failed to parse control-pid value %s", value); - else - s->control_pid = pid; - } else if (streq(key, "control-command")) { - SocketExecCommand id; - - if ((id = socket_exec_command_from_string(value)) < 0) - log_debug("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_debug("Failed to parse fifo value %s", value); - else { - - LIST_FOREACH(port, p, s->ports) - if (p->type == SOCKET_FIFO && - streq_ptr(p->path, value+skip)) - break; - - if (p) { - if (p->fd >= 0) - close_nointr_nofail(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_debug("Failed to parse special value %s", value); - else { - - LIST_FOREACH(port, p, s->ports) - if (p->type == SOCKET_SPECIAL && - streq_ptr(p->path, value+skip)) - break; - - if (p) { - if (p->fd >= 0) - close_nointr_nofail(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_debug("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) { - if (p->fd >= 0) - close_nointr_nofail(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_debug("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) { - if (p->fd >= 0) - close_nointr_nofail(p->fd); - p->fd = fdset_remove(fds, fd); - } - } - - } else - log_debug("Unknown serialization key '%s'", key); - - return 0; -} - -static UnitActiveState socket_active_state(Unit *u) { - assert(u); - - return state_translation_table[SOCKET(u)->state]; -} - -static const char *socket_sub_state_to_string(Unit *u) { - assert(u); - - return socket_state_to_string(SOCKET(u)->state); -} - -static bool socket_check_gc(Unit *u) { - Socket *s = SOCKET(u); - - assert(u); - - return s->n_connections > 0; -} - -static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) { - Socket *s = SOCKET(u); - int cfd = -1; - - assert(s); - assert(fd >= 0); - - if (s->state != SOCKET_LISTENING) - return; - - log_debug("Incoming traffic on %s", u->id); - - if (events != EPOLLIN) { - - if (events & EPOLLHUP) - log_error("%s: Got POLLHUP on a listening socket. The service probably invoked shutdown() on it, and should better not do that.", u->id); - else - log_error("%s: Got unexpected poll event (0x%x) on socket.", u->id, events); - - goto fail; - } - - if (w->socket_accept) { - for (;;) { - - cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK); - if (cfd < 0) { - - if (errno == EINTR) - continue; - - log_error("Failed to accept socket: %m"); - goto fail; - } - - break; - } - - socket_apply_socket_options(s, cfd); - } - - socket_enter_running(s, cfd); - return; - -fail: - socket_enter_stop_pre(s, SOCKET_FAILURE_RESOURCES); -} - -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 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_full(f == SOCKET_SUCCESS ? LOG_DEBUG : LOG_NOTICE, - "%s control process exited, code=%s status=%i", u->id, 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_debug("%s running next command for state %s", u->id, 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_debug("%s got final SIGCHLD for state %s", u->id, socket_state_to_string(s->state)); - - switch (s->state) { - - case SOCKET_START_PRE: - if (f == SOCKET_SUCCESS) - socket_enter_start_post(s); - else - socket_enter_signal(s, SOCKET_FINAL_SIGTERM, 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 void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) { - Socket *s = SOCKET(u); - - assert(s); - assert(elapsed == 1); - assert(w == &s->timer_watch); - - switch (s->state) { - - case SOCKET_START_PRE: - log_warning("%s starting timed out. Terminating.", u->id); - socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); - break; - - case SOCKET_START_POST: - log_warning("%s starting timed out. Stopping.", u->id); - socket_enter_stop_pre(s, SOCKET_FAILURE_TIMEOUT); - break; - - case SOCKET_STOP_PRE: - log_warning("%s stopping timed out. Terminating.", u->id); - socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, SOCKET_FAILURE_TIMEOUT); - break; - - case SOCKET_STOP_PRE_SIGTERM: - if (s->kill_context.send_sigkill) { - log_warning("%s stopping timed out. Killing.", u->id); - socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, SOCKET_FAILURE_TIMEOUT); - } else { - log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->id); - socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); - } - break; - - case SOCKET_STOP_PRE_SIGKILL: - log_warning("%s still around after SIGKILL. Ignoring.", u->id); - socket_enter_stop_post(s, SOCKET_FAILURE_TIMEOUT); - break; - - case SOCKET_STOP_POST: - log_warning("%s stopping timed out (2). Terminating.", u->id); - socket_enter_signal(s, SOCKET_FINAL_SIGTERM, SOCKET_FAILURE_TIMEOUT); - break; - - case SOCKET_FINAL_SIGTERM: - if (s->kill_context.send_sigkill) { - log_warning("%s stopping timed out (2). Killing.", u->id); - socket_enter_signal(s, SOCKET_FINAL_SIGKILL, SOCKET_FAILURE_TIMEOUT); - } else { - log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->id); - socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); - } - break; - - case SOCKET_FINAL_SIGKILL: - log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id); - socket_enter_dead(s, SOCKET_FAILURE_TIMEOUT); - break; - - default: - assert_not_reached("Timeout at wrong time."); - } -} - -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; - } - - if (!(rfds = new(int, rn_fds))) - 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; -} - -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_debug("%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 - 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_debug("%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; -} - -static int socket_kill(Unit *u, KillWho who, int signo, DBusError *error) { - Socket *s = SOCKET(u); - int r = 0; - Set *pid_set = NULL; - - assert(s); - - if (who == KILL_MAIN) { - dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Socket units have no main processes"); - return -ESRCH; - } - - if (s->control_pid <= 0 && who == KILL_CONTROL) { - dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); - return -ESRCH; - } - - if (who == KILL_CONTROL || who == KILL_ALL) - if (s->control_pid > 0) - if (kill(s->control_pid, signo) < 0) - r = -errno; - - if (who == KILL_ALL) { - int q; - - pid_set = set_new(trivial_hash_func, trivial_compare_func); - if (!pid_set) - return -ENOMEM; - - /* Exclude the control pid from being killed via the cgroup */ - if (s->control_pid > 0) { - q = set_put(pid_set, LONG_TO_PTR(s->control_pid)); - if (q < 0) { - r = q; - goto finish; - } - } - - q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, false, pid_set, NULL); - if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) - r = q; - } - -finish: - if (pid_set) - set_free(pid_set); - - return r; -} - -static const char* const socket_state_table[_SOCKET_STATE_MAX] = { - [SOCKET_DEAD] = "dead", - [SOCKET_START_PRE] = "start-pre", - [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_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), - - .sections = - "Unit\0" - "Socket\0" - "Install\0", - - .init = socket_init, - .done = socket_done, - .load = socket_load, - - .kill = socket_kill, - - .coldplug = socket_coldplug, - - .dump = socket_dump, - - .start = socket_start, - .stop = socket_stop, - - .serialize = socket_serialize, - .deserialize_item = socket_deserialize_item, - - .active_state = socket_active_state, - .sub_state_to_string = socket_sub_state_to_string, - - .check_gc = socket_check_gc, - - .fd_event = socket_fd_event, - .sigchld_event = socket_sigchld_event, - .timer_event = socket_timer_event, - - .reset_failed = socket_reset_failed, - - .bus_interface = "org.freedesktop.systemd1.Socket", - .bus_message_handler = bus_socket_message_handler, - .bus_invalidating_properties = bus_socket_invalidating_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_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.", - }, - }, -}; |