X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=socket.c;h=3b74b5e9f82ab15279b7589331d35f44963023ec;hp=926a0fb646d8dddfefc53458c46a792a4bfcde2c;hb=40531a555ae313543c0fbb80137edbae71eee773;hpb=d46de8a1a249e179687361dcaeba27e1c586253a diff --git a/socket.c b/socket.c index 926a0fb64..3b74b5e9f 100644 --- a/socket.c +++ b/socket.c @@ -1,16 +1,37 @@ /*-*- Mode: C; c-basic-offset: 8 -*-*/ +/*** + 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 . +***/ + #include #include #include #include #include -#include +#include #include #include "unit.h" #include "socket.h" #include "log.h" +#include "load-dropin.h" +#include "load-fragment.h" static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { [SOCKET_DEAD] = UNIT_INACTIVE, @@ -22,8 +43,8 @@ static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING, [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING, [SOCKET_STOP_POST] = UNIT_DEACTIVATING, - [SOCKET_STOP_POST_SIGTERM] = UNIT_DEACTIVATING, - [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING, + [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING, + [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING, [SOCKET_MAINTAINANCE] = UNIT_INACTIVE, }; @@ -37,11 +58,21 @@ static const char* const state_string_table[_SOCKET_STATE_MAX] = { [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm", [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill", [SOCKET_STOP_POST] = "stop-post", - [SOCKET_STOP_POST_SIGTERM] = "stop-post-sigterm", - [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill", + [SOCKET_FINAL_SIGTERM] = "final-sigterm", + [SOCKET_FINAL_SIGKILL] = "final-sigkill", [SOCKET_MAINTAINANCE] = "maintainance" }; +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; @@ -58,61 +89,66 @@ static void socket_done(Unit *u) { } exec_context_done(&s->exec_context); - exec_command_free_array(s->exec_command, _SOCKET_EXEC_MAX); + exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX); s->control_command = NULL; - if (s->control_pid > 0) { - unit_unwatch_pid(u, s->control_pid); - s->control_pid = 0; - } + socket_unwatch_control_pid(s); s->service = NULL; free(s->bind_to_device); + s->bind_to_device = NULL; unit_unwatch_timer(u, &s->timer_watch); } -static int socket_init(Unit *u) { +static void socket_init(Unit *u) { Socket *s = SOCKET(u); - char *t; - int r; - /* First, reset everything to the defaults, in case this is a - * reload */ + assert(u); + assert(u->meta.load_state == UNIT_STUB); s->state = 0; s->timer_watch.type = WATCH_INVALID; s->bind_ipv6_only = false; s->backlog = SOMAXCONN; s->timeout_usec = DEFAULT_TIMEOUT_USEC; + s->directory_mode = 0755; + s->socket_mode = 0666; + s->kill_mode = 0; + s->failure = false; + s->control_pid = 0; + s->service = NULL; exec_context_init(&s->exec_context); +} - if ((r = unit_load_fragment_and_dropin(u)) <= 0) { - if (r == 0) - r = -ENOENT; - goto fail; - } +static int socket_load(Unit *u) { + Socket *s = SOCKET(u); + int r; - if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) { - r = -ENOMEM; - goto fail; - } + assert(u); + assert(u->meta.load_state == UNIT_STUB); - r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service); - free(t); + if ((r = unit_load_fragment_and_dropin(u)) < 0) + return r; - if (r < 0) - goto fail; + /* This is a new unit? Then let's add in some extras */ + if (u->meta.load_state == UNIT_LOADED) { - if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0) - goto fail; + if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service))) + return r; - return 0; + if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0) + return r; -fail: - socket_done(u); - return r; + if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) + return r; + + if ((r = unit_add_default_cgroup(u)) < 0) + return r; + } + + return 0; } static const char* listen_lookup(int type) { @@ -130,7 +166,7 @@ static const char* listen_lookup(int type) { static void socket_dump(Unit *u, FILE *f, const char *prefix) { - static const char* const command_table[_SOCKET_EXEC_MAX] = { + static const char* const command_table[_SOCKET_EXEC_COMMAND_MAX] = { [SOCKET_EXEC_START_PRE] = "StartPre", [SOCKET_EXEC_START_POST] = "StartPost", [SOCKET_EXEC_STOP_PRE] = "StopPre", @@ -140,22 +176,33 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) { SocketExecCommand c; Socket *s = SOCKET(u); SocketPort *p; - char *prefix2; + const char *prefix2; + char *p2; assert(s); assert(f); - prefix2 = strappend(prefix, "\t"); - if (!prefix2) - prefix2 = ""; + p2 = strappend(prefix, "\t"); + prefix2 = p2 ? p2 : prefix; fprintf(f, "%sSocket State: %s\n" "%sBindIPv6Only: %s\n" - "%sBacklog: %u\n", + "%sBacklog: %u\n" + "%sKillMode: %s\n" + "%sSocketMode: %04o\n" + "%sDirectoryMode: %04o\n", prefix, state_string_table[s->state], prefix, yes_no(s->bind_ipv6_only), - prefix, s->backlog); + prefix, s->backlog, + prefix, kill_mode_to_string(s->kill_mode), + prefix, s->socket_mode, + prefix, s->directory_mode); + + if (s->control_pid > 0) + fprintf(f, + "%sControl PID: %llu\n", + prefix, (unsigned long long) s->control_pid); if (s->bind_to_device) fprintf(f, @@ -182,7 +229,7 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) { exec_context_dump(&s->exec_context, f, prefix); - for (c = 0; c < _SOCKET_EXEC_MAX; c++) { + for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) { if (!s->exec_command[c]) continue; @@ -192,7 +239,7 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) { exec_command_dump_list(s->exec_command[c], f, prefix2); } - free(prefix2); + free(p2); } static void socket_close_fds(Socket *s) { @@ -224,14 +271,23 @@ static int socket_open_fds(Socket *s) { if (p->type == SOCKET_SOCKET) { - if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0) + if ((r = socket_address_listen( + &p->address, + s->backlog, + s->bind_ipv6_only, + s->bind_to_device, + s->directory_mode, + s->socket_mode, + &p->fd)) < 0) goto rollback; } else { struct stat st; assert(p->type == SOCKET_FIFO); - if (mkfifo(p->path, 0666 & ~s->exec_context.umask) < 0 && errno != EEXIST) { + mkdir_parents(p->path, s->directory_mode); + + if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) { r = -errno; goto rollback; } @@ -285,7 +341,7 @@ static int socket_watch_fds(Socket *s) { if (p->fd < 0) continue; - if ((r = unit_watch_fd(UNIT(s), p->fd, POLLIN, &p->fd_watch)) < 0) + if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0) goto fail; } @@ -309,28 +365,12 @@ static void socket_set_state(Socket *s, SocketState state) { state != SOCKET_STOP_PRE_SIGTERM && state != SOCKET_STOP_PRE_SIGKILL && state != SOCKET_STOP_POST && - state != SOCKET_STOP_POST_SIGTERM && - state != SOCKET_STOP_POST_SIGKILL) + state != SOCKET_FINAL_SIGTERM && + state != SOCKET_FINAL_SIGKILL) { unit_unwatch_timer(UNIT(s), &s->timer_watch); - - 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_STOP_POST_SIGTERM && - state != SOCKET_STOP_POST_SIGKILL) - if (s->control_pid > 0) { - unit_unwatch_pid(UNIT(s), s->control_pid); - s->control_pid = 0; - } - - if (state != SOCKET_START_PRE && - state != SOCKET_START_POST && - state != SOCKET_STOP_PRE && - state != SOCKET_STOP_POST) + socket_unwatch_control_pid(s); s->control_command = NULL; + } if (state != SOCKET_START_POST && state != SOCKET_LISTENING && @@ -343,12 +383,13 @@ static void socket_set_state(Socket *s, SocketState state) { if (state != SOCKET_LISTENING) socket_unwatch_fds(s); - log_debug("%s changed %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]); + if (state != old_state) + log_debug("%s changed %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]); unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); } -static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { +static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { pid_t pid; int r; @@ -356,13 +397,17 @@ static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { assert(c); assert(_pid); - if (timeout) { - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) - goto fail; - } else - unit_unwatch_timer(UNIT(s), &s->timer_watch); + if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) + goto fail; - if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0) + if ((r = exec_spawn(c, + &s->exec_context, + NULL, 0, + true, + true, + UNIT(s)->meta.manager->confirm_spawn, + UNIT(s)->meta.cgroup_bondings, + &pid)) < 0) goto fail; if ((r = unit_watch_pid(UNIT(s), pid)) < 0) @@ -374,8 +419,7 @@ static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { return 0; fail: - if (timeout) - unit_unwatch_timer(UNIT(s), &s->timer_watch); + unit_unwatch_timer(UNIT(s), &s->timer_watch); return r; } @@ -389,6 +433,8 @@ static void socket_enter_dead(Socket *s, bool success) { socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD); } +static void socket_enter_signal(Socket *s, SocketState state, bool success); + static void socket_enter_stop_post(Socket *s, bool success) { int r; assert(s); @@ -396,44 +442,59 @@ static void socket_enter_stop_post(Socket *s, bool success) { if (!success) s->failure = true; - if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) - if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) - goto fail; + socket_unwatch_control_pid(s); - socket_set_state(s, SOCKET_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; - if (!s->control_command) - socket_enter_dead(s, true); + socket_set_state(s, SOCKET_STOP_POST); + } else + socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true); return; fail: log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r)); - socket_enter_dead(s, false); + socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false); } static void socket_enter_signal(Socket *s, SocketState state, bool success) { int r; + bool sent = false; assert(s); if (!success) s->failure = true; - if (s->control_pid > 0) { - int sig; + if (s->kill_mode != KILL_NONE) { + int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL; - sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL; + if (s->kill_mode == KILL_CONTROL_GROUP) { - if (kill(s->control_pid, sig) < 0 && errno != ESRCH) { - r = -errno; - goto fail; + if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) { + if (r != -EAGAIN && r != -ESRCH) + goto fail; + } else + sent = true; } + + if (!sent && s->control_pid > 0) + if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) { + r = -errno; + goto fail; + } } - socket_set_state(s, state); + if (sent) { + if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) + goto fail; - if (s->control_pid <= 0) + socket_set_state(s, state); + } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) + socket_enter_stop_post(s, true); + else socket_enter_dead(s, true); return; @@ -454,13 +515,14 @@ static void socket_enter_stop_pre(Socket *s, bool success) { if (!success) s->failure = true; - if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) - if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) - goto fail; + socket_unwatch_control_pid(s); - socket_set_state(s, SOCKET_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; - if (!s->control_command) + socket_set_state(s, SOCKET_STOP_PRE); + } else socket_enter_stop_post(s, true); return; @@ -495,15 +557,16 @@ static void socket_enter_start_post(Socket *s) { goto fail; } - if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) - if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) { + socket_unwatch_control_pid(s); + + if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) { + if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) { log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); goto fail; } - socket_set_state(s, SOCKET_START_POST); - - if (!s->control_command) + socket_set_state(s, SOCKET_START_POST); + } else socket_enter_listening(s); return; @@ -516,13 +579,14 @@ static void socket_enter_start_pre(Socket *s) { int r; assert(s); - if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) - if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) - goto fail; + socket_unwatch_control_pid(s); - socket_set_state(s, SOCKET_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; - if (!s->control_command) + socket_set_state(s, SOCKET_START_PRE); + } else socket_enter_start_post(s); return; @@ -545,7 +609,7 @@ static void socket_enter_running(Socket *s) { fail: log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r)); - socket_enter_dead(s, false); + socket_enter_stop_pre(s, false); } static void socket_run_next(Socket *s, bool success) { @@ -558,20 +622,24 @@ static void socket_run_next(Socket *s, bool success) { if (!success) s->failure = true; + socket_unwatch_control_pid(s); + s->control_command = s->control_command->command_next; - if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) + if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) goto fail; return; fail: - if (s->state == SOCKET_STOP_PRE) - socket_enter_stop_post(s, false); + log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); + + if (s->state == SOCKET_START_POST) + socket_enter_stop_pre(s, false); else if (s->state == SOCKET_STOP_POST) socket_enter_dead(s, false); else - socket_enter_stop_pre(s, false); + socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false); } static int socket_start(Unit *u) { @@ -585,8 +653,8 @@ static int socket_start(Unit *u) { s->state == SOCKET_STOP_PRE_SIGKILL || s->state == SOCKET_STOP_PRE_SIGTERM || s->state == SOCKET_STOP_POST || - s->state == SOCKET_STOP_POST_SIGTERM || - s->state == SOCKET_STOP_POST_SIGKILL) + s->state == SOCKET_FINAL_SIGTERM || + s->state == SOCKET_FINAL_SIGKILL) return -EAGAIN; if (s->state == SOCKET_START_PRE || @@ -597,6 +665,13 @@ static int socket_start(Unit *u) { if (s->service->meta.load_state != UNIT_LOADED) return -ENOENT; + /* If the service is alredy actvie we cannot start the + * socket */ + if (s->service->state != SERVICE_DEAD && + s->service->state != SERVICE_MAINTAINANCE && + s->service->state != SERVICE_AUTO_RESTART) + return -EBUSY; + assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE); s->failure = false; @@ -615,6 +690,15 @@ static int socket_stop(Unit *u) { s->state == SOCKET_START_POST) return -EAGAIN; + /* 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_SIGTERM) + return 0; + assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING); socket_enter_stop_pre(s, true); @@ -634,7 +718,7 @@ static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) { log_debug("Incoming traffic on %s", unit_id(u)); - if (events != POLLIN) + if (events != EPOLLIN) socket_enter_stop_pre(s, false); socket_enter_running(s); @@ -656,11 +740,10 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { exec_status_fill(&s->control_command->exec_status, pid, code, status); s->control_pid = 0; - log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); + log_debug("%s control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); - if (s->control_command->command_next && - (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) { - log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]); + if (s->control_command->command_next && success) { + log_debug("%s running next command for state %s", unit_id(u), state_string_table[s->state]); socket_run_next(s, success); } else { /* No further commands for this step, so let's figure @@ -674,7 +757,7 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { if (success) socket_enter_start_post(s); else - socket_enter_stop_pre(s, false); + socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false); break; case SOCKET_START_POST: @@ -691,8 +774,8 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { break; case SOCKET_STOP_POST: - case SOCKET_STOP_POST_SIGTERM: - case SOCKET_STOP_POST_SIGKILL: + case SOCKET_FINAL_SIGTERM: + case SOCKET_FINAL_SIGKILL: socket_enter_dead(s, success); break; @@ -707,14 +790,16 @@ static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) { assert(s); assert(elapsed == 1); - assert(w == &s->timer_watch); switch (s->state) { case SOCKET_START_PRE: + log_warning("%s starting timed out. Terminating.", unit_id(u)); + socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false); + case SOCKET_START_POST: - log_warning("%s operation timed out. Stopping.", unit_id(u)); + log_warning("%s starting timed out. Stopping.", unit_id(u)); socket_enter_stop_pre(s, false); break; @@ -735,15 +820,15 @@ static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) { case SOCKET_STOP_POST: log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); - socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false); + socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false); break; - case SOCKET_STOP_POST_SIGTERM: + case SOCKET_FINAL_SIGTERM: log_warning("%s stopping timed out (2). Killing.", unit_id(u)); - socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false); + socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false); break; - case SOCKET_STOP_POST_SIGKILL: + case SOCKET_FINAL_SIGKILL: log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); socket_enter_dead(s, false); break; @@ -800,6 +885,7 @@ const UnitVTable socket_vtable = { .suffix = ".socket", .init = socket_init, + .load = socket_load, .done = socket_done, .dump = socket_dump,