/
master-service.c
1177 lines (1007 loc) · 33.4 KB
/
master-service.c
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/* Copyright (c) 2005-2016 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "lib-signals.h"
#include "ioloop.h"
#include "abspath.h"
#include "array.h"
#include "strescape.h"
#include "env-util.h"
#include "home-expand.h"
#include "process-title.h"
#include "restrict-access.h"
#include "fd-close-on-exec.h"
#include "settings-parser.h"
#include "syslog-util.h"
#include "master-instance.h"
#include "master-login.h"
#include "master-service-ssl.h"
#include "master-service-private.h"
#include "master-service-settings.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <syslog.h>
#define DEFAULT_CONFIG_FILE_PATH SYSCONFDIR"/dovecot.conf"
/* getenv(MASTER_CONFIG_FILE_ENV) provides path to configuration file/socket */
#define MASTER_CONFIG_FILE_ENV "CONFIG_FILE"
/* getenv(MASTER_DOVECOT_VERSION_ENV) provides master's version number */
#define MASTER_DOVECOT_VERSION_ENV "DOVECOT_VERSION"
/* when we're full of connections, how often to check if login state has
changed. we normally notice it immediately because of a signal, so this is
just a fallback against race conditions. */
#define MASTER_SERVICE_STATE_CHECK_MSECS 1000
/* If die callback hasn't managed to stop the service for this many seconds,
force it. */
#define MASTER_SERVICE_DIE_TIMEOUT_MSECS (30*1000)
struct master_service *master_service;
static void master_service_io_listeners_close(struct master_service *service);
static void master_service_refresh_login_state(struct master_service *service);
static void
master_status_send(struct master_service *service, bool important_update);
const char *master_service_getopt_string(void)
{
return "c:i:ko:OL";
}
static void sig_die(const siginfo_t *si, void *context)
{
struct master_service *service = context;
/* SIGINT comes either from master process or from keyboard. we don't
want to log it in either case.*/
if (si->si_signo != SIGINT) {
i_warning("Killed with signal %d (by pid=%s uid=%s code=%s)",
si->si_signo, dec2str(si->si_pid),
dec2str(si->si_uid),
lib_signal_code_to_str(si->si_signo, si->si_code));
} else if ((service->flags & MASTER_SERVICE_FLAG_NO_IDLE_DIE) != 0) {
/* never die when idling */
return;
} else if ((service->flags & MASTER_SERVICE_FLAG_STANDALONE) == 0) {
/* SIGINT came from master. die only if we're not handling
any clients currently. */
if (service->master_status.available_count !=
service->total_available_count)
return;
if (service->idle_die_callback != NULL &&
!service->idle_die_callback()) {
/* we don't want to die - send a notification to master
so it doesn't think we're ignoring it completely. */
master_status_send(service, FALSE);
return;
}
}
service->killed = TRUE;
io_loop_stop(service->ioloop);
}
static void
sig_state_changed(const siginfo_t *si ATTR_UNUSED, void *context)
{
struct master_service *service = context;
master_service_refresh_login_state(service);
}
static void master_service_verify_version_string(struct master_service *service)
{
if (service->version_string != NULL &&
strcmp(service->version_string, PACKAGE_VERSION) != 0) {
i_fatal("Dovecot version mismatch: "
"Master is v%s, %s is v"PACKAGE_VERSION" "
"(if you don't care, set version_ignore=yes)",
service->version_string, service->name);
}
}
static void master_service_init_socket_listeners(struct master_service *service)
{
unsigned int i;
const char *value;
bool have_ssl_sockets = FALSE;
if (service->socket_count == 0)
return;
service->listeners =
i_new(struct master_service_listener, service->socket_count);
for (i = 0; i < service->socket_count; i++) {
struct master_service_listener *l = &service->listeners[i];
l->service = service;
l->fd = MASTER_LISTEN_FD_FIRST + i;
value = getenv(t_strdup_printf("SOCKET%u_SETTINGS", i));
if (value != NULL) {
const char *const *settings =
t_strsplit_tabescaped(value);
if (*settings != NULL) {
l->name = i_strdup_empty(*settings);
settings++;
}
while (*settings != NULL) {
if (strcmp(*settings, "ssl") == 0) {
l->ssl = TRUE;
have_ssl_sockets = TRUE;
} else if (strcmp(*settings, "haproxy") == 0) {
l->haproxy = TRUE;
}
settings++;
}
}
}
service->want_ssl_settings = have_ssl_sockets ||
(service->flags & MASTER_SERVICE_FLAG_USE_SSL_SETTINGS) != 0;
}
struct master_service *
master_service_init(const char *name, enum master_service_flags flags,
int *argc, char **argv[], const char *getopt_str)
{
struct master_service *service;
data_stack_frame_t datastack_frame_id = 0;
unsigned int count;
const char *value;
i_assert(name != NULL);
#ifdef DEBUG
if (getenv("GDB") == NULL &&
(flags & MASTER_SERVICE_FLAG_STANDALONE) == 0) {
value = getenv("SOCKET_COUNT");
if (value == NULL || str_to_uint(value, &count) < 0)
count = 0;
fd_debug_verify_leaks(MASTER_LISTEN_FD_FIRST + count, 1024);
}
#endif
/* Make sure stdin, stdout and stderr fds exist. We especially rely on
stderr being available and a lot of code doesn't like fd being 0.
We'll open /dev/null as write-only also for stdin, since if any
reads are attempted from it we'll want them to fail. */
for (int fd = 0; fd <= 2; fd++) {
struct stat st;
if (fstat(fd, &st) < 0 && errno == EBADF) {
int null_fd = open("/dev/null", O_WRONLY);
if (null_fd == -1)
i_fatal("Can't open /dev/null: %m");
else if (null_fd != fd) {
/* we don't really expect this to happen.
POSIX guarantees that open() returns the
lowest numbered fd. So this would only mean
that fstat() returned EBADF for a fd that
actually existed. */
if (close(null_fd) < 0)
i_error("close(/dev/null) failed: %m");
}
}
}
if ((flags & MASTER_SERVICE_FLAG_STANDALONE) == 0) {
/* make sure we can dump core, at least until
privileges are dropped. (i'm not really sure why this
is needed, because doing the same just before exec
doesn't help, and exec shouldn't affect this with
non-setuid/gid binaries..) */
restrict_access_allow_coredumps(TRUE);
}
/* NOTE: we start rooted, so keep the code minimal until
restrict_access_by_env() is called */
lib_init();
/* Set a logging prefix temporarily. This will be ignored once the log
is properly initialized */
i_set_failure_prefix("%s(init): ", name);
/* make sure all the data stack allocations during init will be freed
before we get to ioloop. the corresponding t_pop() is in
master_service_init_finish(). */
if ((flags & MASTER_SERVICE_FLAG_NO_INIT_DATASTACK_FRAME) == 0)
datastack_frame_id = t_push(NULL);
/* ignore these signals as early as possible */
lib_signals_init();
lib_signals_ignore(SIGPIPE, TRUE);
lib_signals_ignore(SIGALRM, FALSE);
if (getenv(MASTER_UID_ENV) == NULL)
flags |= MASTER_SERVICE_FLAG_STANDALONE;
process_title_init(*argc, argv);
service = i_new(struct master_service, 1);
service->argc = *argc;
service->argv = *argv;
service->name = i_strdup(name);
/* keep getopt_str first in case it contains "+" */
service->getopt_str = *getopt_str == '\0' ?
i_strdup(master_service_getopt_string()) :
i_strconcat(getopt_str, master_service_getopt_string(), NULL);
service->flags = flags;
service->ioloop = io_loop_create();
service->service_count_left = UINT_MAX;
service->config_fd = -1;
service->datastack_frame_id = datastack_frame_id;
service->config_path = i_strdup(getenv(MASTER_CONFIG_FILE_ENV));
if (service->config_path == NULL)
service->config_path = i_strdup(DEFAULT_CONFIG_FILE_PATH);
else
service->config_path_from_master = TRUE;
if ((flags & MASTER_SERVICE_FLAG_STANDALONE) == 0) {
service->version_string = getenv(MASTER_DOVECOT_VERSION_ENV);
service->socket_count = 1;
} else {
service->version_string = PACKAGE_VERSION;
}
/* listener configuration */
value = getenv("SOCKET_COUNT");
if (value != NULL && str_to_uint(value, &service->socket_count) < 0)
i_fatal("Invalid SOCKET_COUNT environment");
T_BEGIN {
master_service_init_socket_listeners(service);
} T_END;
/* set up some kind of logging until we know exactly how and where
we want to log */
if (getenv("LOG_SERVICE") != NULL)
i_set_failure_internal();
if (getenv("USER") != NULL)
i_set_failure_prefix("%s(%s): ", name, getenv("USER"));
else
i_set_failure_prefix("%s: ", name);
if ((flags & MASTER_SERVICE_FLAG_STANDALONE) == 0) {
/* initialize master_status structure */
value = getenv(MASTER_UID_ENV);
if (value == NULL ||
str_to_uint(value, &service->master_status.uid) < 0)
i_fatal(MASTER_UID_ENV" missing");
service->master_status.pid = getpid();
/* set the default limit */
value = getenv(MASTER_CLIENT_LIMIT_ENV);
if (value == NULL || str_to_uint(value, &count) < 0 ||
count == 0)
i_fatal(MASTER_CLIENT_LIMIT_ENV" missing");
master_service_set_client_limit(service, count);
/* seve the process limit */
value = getenv(MASTER_PROCESS_LIMIT_ENV);
if (value != NULL && str_to_uint(value, &count) == 0 &&
count > 0)
service->process_limit = count;
value = getenv(MASTER_PROCESS_MIN_AVAIL_ENV);
if (value != NULL && str_to_uint(value, &count) == 0 &&
count > 0)
service->process_min_avail = count;
/* set the default service count */
value = getenv(MASTER_SERVICE_COUNT_ENV);
if (value != NULL && str_to_uint(value, &count) == 0 &&
count > 0)
master_service_set_service_count(service, count);
/* set the idle kill timeout */
value = getenv(MASTER_SERVICE_IDLE_KILL_ENV);
if (value != NULL && str_to_uint(value, &count) == 0)
service->idle_kill_secs = count;
} else {
master_service_set_client_limit(service, 1);
master_service_set_service_count(service, 1);
}
if ((flags & MASTER_SERVICE_FLAG_KEEP_CONFIG_OPEN) != 0) {
/* since we're going to keep the config socket open anyway,
open it now so we can read settings even after privileges
are dropped. */
master_service_config_socket_try_open(service);
}
master_service_verify_version_string(service);
return service;
}
int master_getopt(struct master_service *service)
{
int c;
i_assert(master_getopt_str_is_valid(service->getopt_str));
while ((c = getopt(service->argc, service->argv,
service->getopt_str)) > 0) {
if (!master_service_parse_option(service, c, optarg))
break;
}
return c;
}
bool master_getopt_str_is_valid(const char *str)
{
unsigned int i, j;
/* make sure there are no duplicates. there are few enough characters
that this should be fast enough. */
for (i = 0; str[i] != '\0'; i++) {
if (str[i] == ':' || str[i] == '+' || str[i] == '-')
continue;
for (j = i+1; str[j] != '\0'; j++) {
if (str[i] == str[j])
return FALSE;
}
}
return TRUE;
}
void master_service_init_log(struct master_service *service,
const char *prefix)
{
const char *path, *timestamp;
if ((service->flags & MASTER_SERVICE_FLAG_STANDALONE) != 0 &&
(service->flags & MASTER_SERVICE_FLAG_DONT_LOG_TO_STDERR) == 0) {
timestamp = getenv("LOG_STDERR_TIMESTAMP");
if (timestamp != NULL)
i_set_failure_timestamp_format(timestamp);
i_set_failure_file("/dev/stderr", "");
return;
}
if (getenv("LOG_SERVICE") != NULL && !service->log_directly) {
/* logging via log service */
i_set_failure_internal();
i_set_failure_prefix("%s", prefix);
return;
}
if (service->set == NULL) {
i_set_failure_file("/dev/stderr", prefix);
return;
}
if (strcmp(service->set->log_path, "syslog") != 0) {
/* error logging goes to file or stderr */
path = home_expand(service->set->log_path);
i_set_failure_file(path, prefix);
}
if (strcmp(service->set->log_path, "syslog") == 0 ||
strcmp(service->set->info_log_path, "syslog") == 0 ||
strcmp(service->set->debug_log_path, "syslog") == 0) {
/* something gets logged to syslog */
int facility;
if (!syslog_facility_find(service->set->syslog_facility,
&facility))
facility = LOG_MAIL;
i_set_failure_syslog("dovecot", LOG_NDELAY, facility);
i_set_failure_prefix("%s", prefix);
if (strcmp(service->set->log_path, "syslog") != 0) {
/* set error handlers back to file */
i_set_fatal_handler(default_fatal_handler);
i_set_error_handler(default_error_handler);
}
}
if (*service->set->info_log_path != '\0' &&
strcmp(service->set->info_log_path, "syslog") != 0) {
path = home_expand(service->set->info_log_path);
if (*path != '\0')
i_set_info_file(path);
}
if (*service->set->debug_log_path != '\0' &&
strcmp(service->set->debug_log_path, "syslog") != 0) {
path = home_expand(service->set->debug_log_path);
if (*path != '\0')
i_set_debug_file(path);
}
i_set_failure_timestamp_format(service->set->log_timestamp);
}
void master_service_set_die_with_master(struct master_service *service,
bool set)
{
service->die_with_master = set;
}
void master_service_set_die_callback(struct master_service *service,
void (*callback)(void))
{
service->die_callback = callback;
}
void master_service_set_idle_die_callback(struct master_service *service,
bool (*callback)(void))
{
service->idle_die_callback = callback;
}
static bool get_instance_config(const char *name, const char **config_path_r)
{
struct master_instance_list *list;
const struct master_instance *inst;
const char *instance_path, *path;
/* note that we don't have any settings yet. we're just finding out
which dovecot.conf we even want to read! so we must use the
hardcoded state_dir path. */
instance_path = t_strconcat(PKG_STATEDIR"/"MASTER_INSTANCE_FNAME, NULL);
list = master_instance_list_init(instance_path);
inst = master_instance_list_find_by_name(list, name);
if (inst != NULL) {
path = t_strdup_printf("%s/dovecot.conf", inst->base_dir);
if (t_readlink(path, config_path_r) < 0)
i_fatal("readlink(%s) failed: %m", path);
}
master_instance_list_deinit(&list);
return inst != NULL;
}
bool master_service_parse_option(struct master_service *service,
int opt, const char *arg)
{
const char *path;
switch (opt) {
case 'c':
i_free(service->config_path);
service->config_path = i_strdup(arg);
service->config_path_changed_with_param = TRUE;
break;
case 'i':
if (!get_instance_config(arg, &path))
i_fatal("Unknown instance name: %s", arg);
service->config_path = i_strdup(path);
service->config_path_changed_with_param = TRUE;
break;
case 'k':
service->keep_environment = TRUE;
break;
case 'o':
if (!array_is_created(&service->config_overrides))
i_array_init(&service->config_overrides, 16);
array_append(&service->config_overrides, &arg, 1);
break;
case 'O':
service->flags |= MASTER_SERVICE_FLAG_NO_CONFIG_SETTINGS;
break;
case 'L':
service->log_directly = TRUE;
break;
default:
return FALSE;
}
return TRUE;
}
static void master_service_error(struct master_service *service)
{
master_service_stop_new_connections(service);
if (service->master_status.available_count ==
service->total_available_count || service->die_with_master) {
if (service->die_callback == NULL)
master_service_stop(service);
else {
service->to_die =
timeout_add(MASTER_SERVICE_DIE_TIMEOUT_MSECS,
master_service_stop,
service);
service->die_callback();
}
}
}
static void master_status_error(struct master_service *service)
{
/* status fd is a write-only pipe, so if we're here it means the
master wants us to die (or died itself). don't die until all
service connections are finished. */
io_remove(&service->io_status_error);
/* the log fd may also be closed already, don't die when trying to
log later */
i_set_failure_ignore_errors(TRUE);
master_service_error(service);
}
void master_service_init_finish(struct master_service *service)
{
enum libsig_flags sigint_flags = LIBSIG_FLAG_DELAYED;
struct stat st;
/* set default signal handlers */
if ((service->flags & MASTER_SERVICE_FLAG_STANDALONE) == 0)
sigint_flags |= LIBSIG_FLAG_RESTART;
lib_signals_set_handler(SIGINT, sigint_flags, sig_die, service);
lib_signals_set_handler(SIGTERM, LIBSIG_FLAG_DELAYED, sig_die, service);
if ((service->flags & MASTER_SERVICE_FLAG_TRACK_LOGIN_STATE) != 0) {
lib_signals_set_handler(SIGUSR1, LIBSIG_FLAGS_SAFE,
sig_state_changed, service);
}
if ((service->flags & MASTER_SERVICE_FLAG_STANDALONE) == 0) {
if (fstat(MASTER_STATUS_FD, &st) < 0 || !S_ISFIFO(st.st_mode))
i_fatal("Must be started by dovecot master process");
/* start listening errors for status fd, it means master died */
service->io_status_error = io_add(MASTER_DEAD_FD, IO_ERROR,
master_status_error, service);
}
master_service_io_listeners_add(service);
if (service->want_ssl_settings &&
(service->flags & MASTER_SERVICE_FLAG_NO_SSL_INIT) == 0)
master_service_ssl_ctx_init(service);
if ((service->flags & MASTER_SERVICE_FLAG_STD_CLIENT) != 0) {
/* we already have a connection to be served */
service->master_status.available_count--;
}
master_status_update(service);
/* close data stack frame opened by master_service_init() */
if ((service->flags & MASTER_SERVICE_FLAG_NO_INIT_DATASTACK_FRAME) == 0) {
if (!t_pop(&service->datastack_frame_id))
i_panic("Leaked t_pop() call");
}
}
void master_service_env_clean(void)
{
const char *value = getenv(DOVECOT_PRESERVE_ENVS_ENV);
if (value == NULL || *value == '\0')
env_clean();
else T_BEGIN {
value = t_strconcat(value, " "DOVECOT_PRESERVE_ENVS_ENV, NULL);
env_clean_except(t_strsplit_spaces(value, " "));
} T_END;
}
void master_service_set_client_limit(struct master_service *service,
unsigned int client_limit)
{
unsigned int used;
i_assert(service->master_status.available_count ==
service->total_available_count);
used = service->total_available_count -
service->master_status.available_count;
i_assert(client_limit >= used);
service->total_available_count = client_limit;
service->master_status.available_count = client_limit - used;
}
unsigned int master_service_get_client_limit(struct master_service *service)
{
return service->total_available_count;
}
unsigned int master_service_get_process_limit(struct master_service *service)
{
return service->process_limit;
}
unsigned int master_service_get_process_min_avail(struct master_service *service)
{
return service->process_min_avail;
}
unsigned int master_service_get_idle_kill_secs(struct master_service *service)
{
return service->idle_kill_secs;
}
void master_service_set_service_count(struct master_service *service,
unsigned int count)
{
unsigned int used;
used = service->total_available_count -
service->master_status.available_count;
i_assert(count >= used);
if (service->total_available_count > count) {
service->total_available_count = count;
service->master_status.available_count = count - used;
}
service->service_count_left = count;
}
unsigned int master_service_get_service_count(struct master_service *service)
{
return service->service_count_left;
}
unsigned int master_service_get_socket_count(struct master_service *service)
{
return service->socket_count;
}
const char *master_service_get_socket_name(struct master_service *service,
int listen_fd)
{
unsigned int i;
i_assert(listen_fd >= MASTER_LISTEN_FD_FIRST);
i = listen_fd - MASTER_LISTEN_FD_FIRST;
i_assert(i < service->socket_count);
return service->listeners[i].name != NULL ?
service->listeners[i].name : "";
}
void master_service_set_avail_overflow_callback(struct master_service *service,
void (*callback)(void))
{
service->avail_overflow_callback = callback;
}
const char *master_service_get_config_path(struct master_service *service)
{
return service->config_path;
}
const char *master_service_get_version_string(struct master_service *service)
{
return service->version_string;
}
const char *master_service_get_name(struct master_service *service)
{
return service->name;
}
void master_service_run(struct master_service *service,
master_service_connection_callback_t *callback)
{
service->callback = callback;
io_loop_run(service->ioloop);
service->callback = NULL;
}
void master_service_stop(struct master_service *service)
{
io_loop_stop(service->ioloop);
}
void master_service_stop_new_connections(struct master_service *service)
{
unsigned int current_count;
if (service->stopping)
return;
service->stopping = TRUE;
master_service_io_listeners_remove(service);
master_service_io_listeners_close(service);
/* make sure we stop after servicing current connections */
current_count = service->total_available_count -
service->master_status.available_count;
service->service_count_left = current_count;
service->total_available_count = current_count;
if (current_count == 0)
master_service_stop(service);
else {
/* notify master that we're not accepting any more
connections */
service->master_status.available_count = 0;
master_status_update(service);
}
if (service->login != NULL)
master_login_stop(service->login);
}
bool master_service_is_killed(struct master_service *service)
{
return service->killed;
}
bool master_service_is_master_stopped(struct master_service *service)
{
return service->io_status_error == NULL &&
(service->flags & MASTER_SERVICE_FLAG_STANDALONE) == 0;
}
void master_service_anvil_send(struct master_service *service, const char *cmd)
{
ssize_t ret;
if ((service->flags & MASTER_SERVICE_FLAG_STANDALONE) != 0)
return;
ret = write(MASTER_ANVIL_FD, cmd, strlen(cmd));
if (ret < 0) {
if (errno == EPIPE) {
/* anvil process was probably recreated, don't bother
logging an error about losing connection to it */
return;
}
i_error("write(anvil) failed: %m");
} else if (ret == 0)
i_error("write(anvil) failed: EOF");
else {
i_assert((size_t)ret == strlen(cmd));
}
}
void master_service_client_connection_created(struct master_service *service)
{
i_assert(service->master_status.available_count > 0);
service->master_status.available_count--;
master_status_update(service);
}
void master_service_client_connection_handled(struct master_service *service,
struct master_service_connection *conn)
{
if (!conn->accepted) {
if (close(conn->fd) < 0)
i_error("close(service connection) failed: %m");
master_service_client_connection_destroyed(service);
} else if (conn->fifo) {
/* reading FIFOs stays open forever, don't count them
as real clients */
master_service_client_connection_destroyed(service);
}
if (service->master_status.available_count == 0 &&
service->service_count_left == 1) {
/* we're not going to accept any more connections after this.
go ahead and close the connection early. don't do this
before calling callback, because it may want to access
the listen_fd (e.g. to check socket permissions). */
i_assert(service->listeners != NULL);
master_service_io_listeners_remove(service);
master_service_io_listeners_close(service);
}
}
void master_service_client_connection_callback(struct master_service *service,
struct master_service_connection *conn)
{
service->callback(conn);
master_service_client_connection_handled(service, conn);
}
void master_service_client_connection_accept(struct master_service_connection *conn)
{
conn->accepted = TRUE;
}
void master_service_client_connection_destroyed(struct master_service *service)
{
/* we can listen again */
master_service_io_listeners_add(service);
i_assert(service->total_available_count > 0);
i_assert(service->service_count_left > 0);
if (service->service_count_left == service->total_available_count) {
service->total_available_count--;
service->service_count_left--;
} else {
if (service->service_count_left != UINT_MAX)
service->service_count_left--;
i_assert(service->master_status.available_count <
service->total_available_count);
service->master_status.available_count++;
}
if (service->service_count_left == 0) {
i_assert(service->master_status.available_count ==
service->total_available_count);
master_service_stop(service);
} else if ((service->io_status_error == NULL ||
service->listeners == NULL) &&
service->master_status.available_count ==
service->total_available_count) {
/* we've finished handling all clients, and
a) master has closed the connection
b) there are no listeners (std-client?) */
master_service_stop(service);
} else {
master_status_update(service);
}
}
static void master_service_set_login_state(struct master_service *service,
enum master_login_state state)
{
if (service->to_overflow_state != NULL)
timeout_remove(&service->to_overflow_state);
switch (state) {
case MASTER_LOGIN_STATE_NONFULL:
service->call_avail_overflow = FALSE;
if (service->master_status.available_count > 0)
return;
/* some processes should now be able to handle new connections,
although we can't. but there may be race conditions, so
make sure that we'll check again soon if the state has
changed to "full" without our knowledge. */
service->to_overflow_state =
timeout_add(MASTER_SERVICE_STATE_CHECK_MSECS,
master_service_refresh_login_state,
service);
return;
case MASTER_LOGIN_STATE_FULL:
/* make sure we're listening for more connections */
service->call_avail_overflow = TRUE;
master_service_io_listeners_add(service);
return;
}
i_error("Invalid master login state: %d", state);
}
static void master_service_refresh_login_state(struct master_service *service)
{
int ret;
ret = lseek(MASTER_LOGIN_NOTIFY_FD, 0, SEEK_CUR);
if (ret < 0)
i_error("lseek(login notify fd) failed: %m");
else
master_service_set_login_state(service, ret);
}
void master_service_close_config_fd(struct master_service *service)
{
if (service->config_fd != -1) {
if (close(service->config_fd) < 0)
i_error("close(master config fd) failed: %m");
service->config_fd = -1;
}
}
void master_service_deinit(struct master_service **_service)
{
struct master_service *service = *_service;
unsigned int i;
*_service = NULL;
master_service_haproxy_abort(service);
master_service_io_listeners_remove(service);
master_service_ssl_ctx_deinit(service);
master_service_close_config_fd(service);
if (service->to_die != NULL)
timeout_remove(&service->to_die);
if (service->to_overflow_state != NULL)
timeout_remove(&service->to_overflow_state);
if (service->to_status != NULL)
timeout_remove(&service->to_status);
if (service->io_status_error != NULL)
io_remove(&service->io_status_error);
if (service->io_status_write != NULL)
io_remove(&service->io_status_write);
if (array_is_created(&service->config_overrides))
array_free(&service->config_overrides);
if (service->set_parser != NULL) {
settings_parser_deinit(&service->set_parser);
pool_unref(&service->set_pool);
}
lib_signals_deinit();
/* run atexit callbacks before destroying ioloop */
lib_atexit_run();
io_loop_destroy(&service->ioloop);
for (i = 0; i < service->socket_count; i++)
i_free(service->listeners[i].name);
i_free(service->listeners);
i_free(service->getopt_str);
i_free(service->name);
i_free(service->config_path);
i_free(service);
lib_deinit();
}
static void master_service_listen(struct master_service_listener *l)
{
struct master_service *service = l->service;
struct master_service_connection conn;
if (service->master_status.available_count == 0) {
/* we are full. stop listening for now, unless overflow
callback destroys one of the existing connections */
if (service->call_avail_overflow &&
service->avail_overflow_callback != NULL)
service->avail_overflow_callback();
if (service->master_status.available_count == 0) {
master_service_io_listeners_remove(service);
return;
}
}
memset(&conn, 0, sizeof(conn));
conn.listen_fd = l->fd;
conn.fd = net_accept(l->fd, &conn.remote_ip, &conn.remote_port);
if (conn.fd < 0) {
struct stat st;
int orig_errno = errno;
if (conn.fd == -1)
return;
if (errno == ENOTSOCK) {
/* it's not a socket. should be a fifo. */
} else if (errno == EINVAL &&
(fstat(l->fd, &st) == 0 && S_ISFIFO(st.st_mode))) {
/* BSDI fails accept(fifo) with EINVAL. */
} else {
errno = orig_errno;
i_error("net_accept() failed: %m");
/* try again later after one of the existing
connections has died */
master_service_io_listeners_remove(service);
return;
}
/* use the "listener" as the connection fd and stop the
listener. */
conn.fd = l->fd;
conn.listen_fd = l->fd;
conn.fifo = TRUE;
io_remove(&l->io);
l->fd = -1;
}
conn.ssl = l->ssl;
conn.name = master_service_get_socket_name(service, conn.listen_fd);
(void)net_getsockname(conn.fd, &conn.local_ip, &conn.local_port);
conn.real_remote_ip = conn.remote_ip;
conn.real_remote_port = conn.remote_port;
conn.real_local_ip = conn.local_ip;
conn.real_local_port = conn.local_port;
net_set_nonblock(conn.fd, TRUE);
master_service_client_connection_created(service);
if (l->haproxy)
master_service_haproxy_new(service, &conn);
else
master_service_client_connection_callback(service, &conn);
}
void master_service_io_listeners_add(struct master_service *service)
{
unsigned int i;
if (service->stopping)
return;