summaryrefslogtreecommitdiff
path: root/src/socket.c
diff options
context:
space:
mode:
authorKay Sievers <kay@vrfy.org>2012-04-11 12:59:52 +0200
committerKay Sievers <kay@vrfy.org>2012-04-11 16:03:51 +0200
commitb30e2f4c18ad81b04e4314fd191a5d458553773c (patch)
treede15b901a08d681a7a1e95c7a2d692b0ec181708 /src/socket.c
parent9543ad166338a7bef8718070f11465df4b9badd7 (diff)
move libsystemd_core.la sources into core/
Diffstat (limited to 'src/socket.c')
-rw-r--r--src/socket.c2218
1 files changed, 0 insertions, 2218 deletions
diff --git a/src/socket.c b/src/socket.c
deleted file mode 100644
index 5b24b3422b..0000000000
--- a/src/socket.c
+++ /dev/null
@@ -1,2218 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <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 "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 "unit-name.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;
-
- 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;
-
- 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)->sysv_path) {
- 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->exec_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;
-
- if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 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])
- if ((r = socket_add_one_mount_link(s, MOUNT(other))) < 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 == MANAGER_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;
- }
-
- 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);
-
- 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);
-
- 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 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");
-}
-
-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");
-}
-
-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(path, directory_mode);
-
- if ((r = label_fifofile_set(path)) < 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_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:
- label_file_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,
- &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->exec_context.kill_mode != KILL_NONE) {
- int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? s->exec_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->exec_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;
-
- if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 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->sysv_path) {
- 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 (;;) {
-
- if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 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))
- 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->exec_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->exec_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, KillMode mode, 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 && mode == KILL_CONTROL_GROUP) {
- int q;
-
- if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
- return -ENOMEM;
-
- /* Exclude the control pid from being killed via the cgroup */
- if (s->control_pid > 0)
- if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
- r = q;
- goto finish;
- }
-
- if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
- if (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 = {
- .suffix = ".socket",
- .object_size = sizeof(Socket),
- .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
-};