X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=socket.c;h=6b1da016dd4cdb13695f9a914a38ee8b6c04bcb4;hp=23e347d7f4a708a8311dd80302a7103c8ef4902c;hb=a9f5d45466c923442ceb31ab2a4206736133d9d4;hpb=44d8db9e5aa86165c97289f6c78a7e42bac78362 diff --git a/socket.c b/socket.c index 23e347d7f..6b1da016d 100644 --- a/socket.c +++ b/socket.c @@ -1,34 +1,68 @@ /*-*- 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 "name.h" +#include "unit.h" #include "socket.h" #include "log.h" -static const NameActiveState state_table[_SOCKET_STATE_MAX] = { - [SOCKET_DEAD] = NAME_INACTIVE, - [SOCKET_START_PRE] = NAME_ACTIVATING, - [SOCKET_START_POST] = NAME_ACTIVATING, - [SOCKET_LISTENING] = NAME_ACTIVE, - [SOCKET_RUNNING] = NAME_ACTIVE, - [SOCKET_STOP_PRE] = NAME_DEACTIVATING, - [SOCKET_STOP_PRE_SIGTERM] = NAME_DEACTIVATING, - [SOCKET_STOP_PRE_SIGKILL] = NAME_DEACTIVATING, - [SOCKET_STOP_POST] = NAME_DEACTIVATING, - [SOCKET_STOP_POST_SIGTERM] = NAME_DEACTIVATING, - [SOCKET_STOP_POST_SIGKILL] = NAME_DEACTIVATING, - [SOCKET_MAINTAINANCE] = NAME_INACTIVE, +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_STOP_POST_SIGTERM] = UNIT_DEACTIVATING, + [SOCKET_STOP_POST_SIGKILL] = UNIT_DEACTIVATING, + [SOCKET_MAINTAINANCE] = UNIT_INACTIVE, +}; + +static const char* const state_string_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_STOP_POST_SIGTERM] = "stop-post-sigterm", + [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill", + [SOCKET_MAINTAINANCE] = "maintainance" }; -static void socket_done(Name *n) { - Socket *s = SOCKET(n); +static void socket_done(Unit *u) { + Socket *s = SOCKET(u); SocketPort *p; assert(s); @@ -47,17 +81,19 @@ static void socket_done(Name *n) { s->control_command = NULL; if (s->control_pid > 0) { - name_unwatch_pid(n, s->control_pid); + unit_unwatch_pid(u, s->control_pid); s->control_pid = 0; } s->service = NULL; - name_unwatch_timer(n, &s->timer_id); + free(s->bind_to_device); + + unit_unwatch_timer(u, &s->timer_watch); } -static int socket_init(Name *n) { - Socket *s = SOCKET(n); +static int socket_init(Unit *u) { + Socket *s = SOCKET(u); char *t; int r; @@ -65,33 +101,36 @@ static int socket_init(Name *n) { * reload */ s->state = 0; - s->timer_id = -1; + s->timer_watch.type = WATCH_INVALID; s->bind_ipv6_only = false; s->backlog = SOMAXCONN; s->timeout_usec = DEFAULT_TIMEOUT_USEC; exec_context_init(&s->exec_context); - if ((r = name_load_fragment_and_dropin(n)) < 0) + if ((r = unit_load_fragment_and_dropin(u)) <= 0) { + if (r == 0) + r = -ENOENT; goto fail; + } - if (!(t = name_change_suffix(name_id(n), ".service"))) { + if (!(t = unit_name_change_suffix(unit_id(u), ".service"))) { r = -ENOMEM; goto fail; } - r = manager_load_name(n->meta.manager, t, (Name**) &s->service); + r = manager_load_unit(u->meta.manager, t, (Unit**) &s->service); free(t); if (r < 0) goto fail; - if ((r = name_add_dependency(n, NAME_BEFORE, NAME(s->service))) < 0) + if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0) goto fail; return 0; fail: - socket_done(n); + socket_done(u); return r; } @@ -108,22 +147,7 @@ static const char* listen_lookup(int type) { return NULL; } -static void socket_dump(Name *n, FILE *f, const char *prefix) { - - static const char* const 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_STOP_POST_SIGTERM] = "stop-post-sigterm", - [SOCKET_STOP_POST_SIGKILL] = "stop-post-sigkill", - [SOCKET_MAINTAINANCE] = "maintainance" - }; +static void socket_dump(Unit *u, FILE *f, const char *prefix) { static const char* const command_table[_SOCKET_EXEC_MAX] = { [SOCKET_EXEC_START_PRE] = "StartPre", @@ -133,19 +157,30 @@ static void socket_dump(Name *n, FILE *f, const char *prefix) { }; SocketExecCommand c; - Socket *s = SOCKET(n); + 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" "%sBindIPv6Only: %s\n" "%sBacklog: %u\n", - prefix, state_table[s->state], + prefix, state_string_table[s->state], prefix, yes_no(s->bind_ipv6_only), prefix, s->backlog); + if (s->bind_to_device) + fprintf(f, + "%sBindToDevice: %s\n", + prefix, s->bind_to_device); + LIST_FOREACH(port, p, s->ports) { if (p->type == SOCKET_SOCKET) { @@ -167,11 +202,16 @@ static void socket_dump(Name *n, FILE *f, const char *prefix) { exec_context_dump(&s->exec_context, f, prefix); for (c = 0; c < _SOCKET_EXEC_MAX; c++) { - ExecCommand *i; + if (!s->exec_command[c]) + continue; - LIST_FOREACH(command, i, s->exec_command[c]) - fprintf(f, "%s%s: %s\n", prefix, command_table[c], i->path); + fprintf(f, "%s→ %s:\n", + prefix, command_table[c]); + + exec_command_dump_list(s->exec_command[c], f, prefix2); } + + free(p2); } static void socket_close_fds(Socket *s) { @@ -183,7 +223,7 @@ static void socket_close_fds(Socket *s) { if (p->fd < 0) continue; - name_unwatch_fd(NAME(s), p->fd); + unit_unwatch_fd(UNIT(s), &p->fd_watch); assert_se(close_nointr(p->fd) >= 0); p->fd = -1; @@ -203,7 +243,7 @@ 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, &p->fd)) < 0) + if ((r = socket_address_listen(&p->address, s->backlog, s->bind_ipv6_only, s->bind_to_device, &p->fd)) < 0) goto rollback; } else { @@ -250,7 +290,7 @@ static void socket_unwatch_fds(Socket *s) { if (p->fd < 0) continue; - name_unwatch_fd(NAME(s), p->fd); + unit_unwatch_fd(UNIT(s), &p->fd_watch); } } @@ -264,7 +304,7 @@ static int socket_watch_fds(Socket *s) { if (p->fd < 0) continue; - if ((r = name_watch_fd(NAME(s), p->fd, POLLIN)) < 0) + if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0) goto fail; } @@ -290,7 +330,7 @@ static void socket_set_state(Socket *s, SocketState state) { state != SOCKET_STOP_POST && state != SOCKET_STOP_POST_SIGTERM && state != SOCKET_STOP_POST_SIGKILL) - name_unwatch_timer(NAME(s), &s->timer_id); + unit_unwatch_timer(UNIT(s), &s->timer_watch); if (state != SOCKET_START_PRE && state != SOCKET_START_POST && @@ -300,8 +340,8 @@ static void socket_set_state(Socket *s, SocketState state) { state != SOCKET_STOP_POST && state != SOCKET_STOP_POST_SIGTERM && state != SOCKET_STOP_POST_SIGKILL) - if (s->control_pid >= 0) { - name_unwatch_pid(NAME(s), s->control_pid); + if (s->control_pid > 0) { + unit_unwatch_pid(UNIT(s), s->control_pid); s->control_pid = 0; } @@ -322,7 +362,9 @@ static void socket_set_state(Socket *s, SocketState state) { if (state != SOCKET_LISTENING) socket_unwatch_fds(s); - name_notify(NAME(s), state_table[old_state], state_table[s->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) { @@ -334,15 +376,15 @@ static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { assert(_pid); if (timeout) { - if ((r = name_watch_timer(NAME(s), s->timeout_usec, &s->timer_id)) < 0) + if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) goto fail; } else - name_unwatch_timer(NAME(s), &s->timer_id); + unit_unwatch_timer(UNIT(s), &s->timer_watch); if ((r = exec_spawn(c, &s->exec_context, NULL, 0, &pid)) < 0) goto fail; - if ((r = name_watch_pid(NAME(s), pid)) < 0) + if ((r = unit_watch_pid(UNIT(s), pid)) < 0) /* FIXME: we need to do something here */ goto fail; @@ -352,7 +394,7 @@ static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) { fail: if (timeout) - name_unwatch_timer(NAME(s), &s->timer_id); + unit_unwatch_timer(UNIT(s), &s->timer_watch); return r; } @@ -373,19 +415,19 @@ 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 ((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_set_state(s, SOCKET_STOP_POST); - } else + socket_set_state(s, SOCKET_STOP_POST); + + if (!s->control_command) socket_enter_dead(s, true); return; fail: - log_warning("%s failed to run stop-post executable: %s", name_id(NAME(s)), strerror(-r)); + log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r)); socket_enter_dead(s, false); } @@ -406,15 +448,17 @@ static void socket_enter_signal(Socket *s, SocketState state, bool success) { r = -errno; goto fail; } + } - socket_set_state(s, state); - } else + socket_set_state(s, state); + + if (s->control_pid <= 0) socket_enter_dead(s, true); return; fail: - log_warning("%s failed to kill processes: %s", name_id(NAME(s)), strerror(-r)); + log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL) socket_enter_stop_post(s, false); @@ -429,42 +473,57 @@ 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 ((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_set_state(s, SOCKET_STOP_PRE); - } else + socket_set_state(s, SOCKET_STOP_PRE); + + if (!s->control_command) socket_enter_stop_post(s, true); return; fail: - log_warning("%s failed to run stop-pre executable: %s", name_id(NAME(s)), strerror(-r)); + log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); socket_enter_stop_post(s, false); } -static void socket_enter_start_post(Socket *s) { +static void socket_enter_listening(Socket *s) { int r; assert(s); - if ((r = socket_open_fds(s)) < 0 || - (r = socket_watch_fds(s)) < 0) { - log_warning("%s failed to listen on sockets: %s", name_id(NAME(s)), strerror(-r)); + if ((r = socket_watch_fds(s)) < 0) { + log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r)); goto fail; } - if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) { + socket_set_state(s, SOCKET_LISTENING); + return; + +fail: + socket_enter_stop_pre(s, false); +} + +static void socket_enter_start_post(Socket *s) { + int r; + assert(s); + + if ((r = socket_open_fds(s)) < 0) { + log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r)); + 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) { - log_warning("%s failed to run start-post executable: %s", name_id(NAME(s)), strerror(-r)); + 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); - } else - socket_set_state(s, SOCKET_LISTENING); + socket_set_state(s, SOCKET_START_POST); + + if (!s->control_command) + socket_enter_listening(s); return; @@ -476,19 +535,19 @@ static void socket_enter_start_pre(Socket *s) { int r; assert(s); - if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) { - + 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_set_state(s, SOCKET_START_PRE); - } else + socket_set_state(s, SOCKET_START_PRE); + + if (!s->control_command) socket_enter_start_post(s); return; fail: - log_warning("%s failed to run start-pre exectuable: %s", name_id(NAME(s)), strerror(-r)); + log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r)); socket_enter_dead(s, false); } @@ -497,14 +556,14 @@ static void socket_enter_running(Socket *s) { assert(s); - if ((r = manager_add_job(NAME(s)->meta.manager, JOB_START, NAME(s->service), JOB_REPLACE, true, NULL)) < 0) + if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0) goto fail; socket_set_state(s, SOCKET_RUNNING); return; fail: - log_warning("%s failed to queue socket startup job: %s", name_id(NAME(s)), strerror(-r)); + log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r)); socket_enter_dead(s, false); } @@ -534,8 +593,8 @@ fail: socket_enter_stop_pre(s, false); } -static int socket_start(Name *n) { - Socket *s = SOCKET(n); +static int socket_start(Unit *u) { + Socket *s = SOCKET(u); assert(s); @@ -554,7 +613,7 @@ static int socket_start(Name *n) { return 0; /* Cannot run this without the service being around */ - if (s->service->meta.load_state != NAME_LOADED) + if (s->service->meta.load_state != UNIT_LOADED) return -ENOENT; assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE); @@ -564,8 +623,8 @@ static int socket_start(Name *n) { return 0; } -static int socket_stop(Name *n) { - Socket *s = SOCKET(n); +static int socket_stop(Unit *u) { + Socket *s = SOCKET(u); assert(s); @@ -581,33 +640,33 @@ static int socket_stop(Name *n) { return 0; } -static NameActiveState socket_active_state(Name *n) { - assert(n); +static UnitActiveState socket_active_state(Unit *u) { + assert(u); - return state_table[SOCKET(n)->state]; + return state_translation_table[SOCKET(u)->state]; } -static void socket_fd_event(Name *n, int fd, uint32_t events) { - Socket *s = SOCKET(n); +static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) { + Socket *s = SOCKET(u); assert(s); - log_info("Incoming traffic on %s", name_id(n)); + 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); } -static void socket_sigchld_event(Name *n, pid_t pid, int code, int status) { - Socket *s = SOCKET(n); +static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) { + Socket *s = SOCKET(u); bool success; assert(s); assert(pid >= 0); - success = code == CLD_EXITED || status == 0; + success = code == CLD_EXITED && status == 0; s->failure = s->failure || !success; assert(s->control_pid == pid); @@ -616,27 +675,30 @@ static void socket_sigchld_event(Name *n, 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", name_id(n), 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))) + (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]); socket_run_next(s, success); - else { + } else { /* No further commands for this step, so let's figure * out what to do next */ + log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]); + switch (s->state) { case SOCKET_START_PRE: if (success) - socket_enter_start_pre(s); + socket_enter_start_post(s); else socket_enter_stop_pre(s, false); break; case SOCKET_START_POST: if (success) - socket_set_state(s, SOCKET_LISTENING); + socket_enter_listening(s); else socket_enter_stop_pre(s, false); break; @@ -659,49 +721,49 @@ static void socket_sigchld_event(Name *n, pid_t pid, int code, int status) { } } -static void socket_timer_event(Name *n, int id, uint64_t elapsed) { - Socket *s = SOCKET(n); +static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) { + Socket *s = SOCKET(u); assert(s); assert(elapsed == 1); - assert(s->timer_id == id); + assert(w == &s->timer_watch); switch (s->state) { case SOCKET_START_PRE: case SOCKET_START_POST: - log_warning("%s operation timed out. Stopping.", name_id(n)); + log_warning("%s operation timed out. Stopping.", unit_id(u)); socket_enter_stop_pre(s, false); break; case SOCKET_STOP_PRE: - log_warning("%s stopping timed out. Terminating.", name_id(n)); + log_warning("%s stopping timed out. Terminating.", unit_id(u)); socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false); break; case SOCKET_STOP_PRE_SIGTERM: - log_warning("%s stopping timed out. Killing.", name_id(n)); + log_warning("%s stopping timed out. Killing.", unit_id(u)); socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false); break; case SOCKET_STOP_PRE_SIGKILL: - log_warning("%s still around after SIGKILL. Ignoring.", name_id(n)); + log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); socket_enter_stop_post(s, false); break; case SOCKET_STOP_POST: - log_warning("%s stopping timed out (2). Terminating.", name_id(n)); + log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false); break; case SOCKET_STOP_POST_SIGTERM: - log_warning("%s stopping timed out (2). Killing.", name_id(n)); + log_warning("%s stopping timed out (2). Killing.", unit_id(u)); socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false); break; case SOCKET_STOP_POST_SIGKILL: - log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", name_id(n)); + log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); socket_enter_dead(s, false); break; @@ -742,7 +804,18 @@ int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) { return 0; } -const NameVTable socket_vtable = { +void socket_notify_service_dead(Socket *s) { + assert(s); + + /* The service is dead. Dang. */ + + if (s->state == SOCKET_RUNNING) { + log_debug("%s got notified about service death.", unit_id(UNIT(s))); + socket_enter_listening(s); + } +} + +const UnitVTable socket_vtable = { .suffix = ".socket", .init = socket_init,