381 lines
10 KiB
C
381 lines
10 KiB
C
|
|
#include <lighttpd/angel_base.h>
|
|
|
|
#define CATCH_SIGNAL(loop, cb, n) do { \
|
|
ev_init(&srv->sig_w_##n, cb); \
|
|
ev_signal_set(&srv->sig_w_##n, SIG##n); \
|
|
ev_signal_start(loop, &srv->sig_w_##n); \
|
|
srv->sig_w_##n.data = srv; \
|
|
/* Signal watchers shouldn't keep loop alive */ \
|
|
ev_unref(loop); \
|
|
} while (0)
|
|
|
|
#define UNCATCH_SIGNAL(loop, n) li_ev_safe_ref_and_stop(ev_signal_stop, loop, &srv->sig_w_##n)
|
|
|
|
static void sigint_cb(struct ev_loop *loop, struct ev_signal *w, int revents) {
|
|
liServer *srv = (liServer*) w->data;
|
|
UNUSED(loop);
|
|
UNUSED(revents);
|
|
|
|
li_server_stop(srv);
|
|
}
|
|
|
|
static void sigpipe_cb(struct ev_loop *loop, struct ev_signal *w, int revents) {
|
|
/* ignore */
|
|
UNUSED(loop); UNUSED(w); UNUSED(revents);
|
|
}
|
|
|
|
liServer* li_server_new(const gchar *module_dir) {
|
|
liServer *srv = g_slice_new0(liServer);
|
|
|
|
srv->loop = ev_default_loop(0);
|
|
|
|
CATCH_SIGNAL(srv->loop, sigint_cb, INT);
|
|
CATCH_SIGNAL(srv->loop, sigint_cb, TERM);
|
|
CATCH_SIGNAL(srv->loop, sigpipe_cb, PIPE);
|
|
|
|
log_init(srv);
|
|
plugins_init(srv, module_dir);
|
|
return srv;
|
|
}
|
|
|
|
void li_server_free(liServer* srv) {
|
|
plugins_clear(srv);
|
|
|
|
log_clean(srv);
|
|
|
|
UNCATCH_SIGNAL(srv->loop, INT);
|
|
UNCATCH_SIGNAL(srv->loop, TERM);
|
|
UNCATCH_SIGNAL(srv->loop, PIPE);
|
|
|
|
g_slice_free(liServer, srv);
|
|
}
|
|
|
|
void li_server_stop(liServer *srv) {
|
|
UNCATCH_SIGNAL(srv->loop, INT);
|
|
UNCATCH_SIGNAL(srv->loop, TERM);
|
|
|
|
plugins_config_load(srv, NULL);
|
|
}
|
|
|
|
static void instance_angel_call_cb(liAngelConnection *acon,
|
|
const gchar *mod, gsize mod_len, const gchar *action, gsize action_len,
|
|
gint32 id,
|
|
GString *data) {
|
|
|
|
liInstance *i = (liInstance*) acon->data;
|
|
liServer *srv = i->srv;
|
|
liPlugins *ps = &srv->plugins;
|
|
liPlugin *p;
|
|
liPluginHandleCallCB cb;
|
|
UNUSED(mod_len);
|
|
UNUSED(action_len);
|
|
|
|
p = g_hash_table_lookup(ps->ht_plugins, mod);
|
|
if (!p) {
|
|
GString *errstr = g_string_sized_new(0);
|
|
GError *err = NULL;
|
|
g_string_printf(errstr, "Plugin '%s' not available in lighttpd-angel", mod);
|
|
if (!li_angel_send_result(acon, id, errstr, NULL, NULL, &err)) {
|
|
ERROR(srv, "Couldn't send result: %s", err->message);
|
|
g_error_free(err);
|
|
}
|
|
return;
|
|
}
|
|
|
|
cb = (liPluginHandleCallCB)(intptr_t) g_hash_table_lookup(p->angel_callbacks, action);
|
|
if (!cb) {
|
|
GString *errstr = g_string_sized_new(0);
|
|
GError *err = NULL;
|
|
g_string_printf(errstr, "Action '%s' not available in plugin '%s' of lighttpd-angel", action, mod);
|
|
if (!li_angel_send_result(acon, id, errstr, NULL, NULL, &err)) {
|
|
ERROR(srv, "Couldn't send result: %s", err->message);
|
|
g_error_free(err);
|
|
}
|
|
return;
|
|
}
|
|
|
|
cb(srv, i, p, id, data);
|
|
}
|
|
|
|
static void instance_angel_close_cb(liAngelConnection *acon, GError *err) {
|
|
liInstance *i = (liInstance*) acon->data;
|
|
liServer *srv = i->srv;
|
|
gboolean hide_error = FALSE;
|
|
|
|
if (err) {
|
|
if (LI_INSTANCE_FINISHED == i->s_dest &&
|
|
LI_ANGEL_CONNECTION_RESET == err->code &&
|
|
LI_ANGEL_CONNECTION_ERROR == err->domain) hide_error = TRUE;
|
|
}
|
|
if (!hide_error)
|
|
ERROR(srv, "angel connection closed: %s", err ? err->message : g_strerror(errno));
|
|
if (err) g_error_free(err);
|
|
|
|
i->acon = NULL;
|
|
li_angel_connection_free(acon);
|
|
}
|
|
|
|
static void instance_child_cb(struct ev_loop *loop, ev_child *w, int revents) {
|
|
liInstance *i = (liInstance*) w->data;
|
|
liInstanceState news;
|
|
UNUSED(revents);
|
|
|
|
if (i->s_dest == LI_INSTANCE_FINISHED) {
|
|
if (WIFEXITED(w->rstatus)) {
|
|
if (0 != WEXITSTATUS(w->rstatus)) {
|
|
ERROR(i->srv, "child %i died with exit status %i", i->proc->child_pid, WEXITSTATUS(w->rstatus));
|
|
} /* exit status 0 is ok, no message */
|
|
} else if (WIFSIGNALED(w->rstatus)) {
|
|
ERROR(i->srv, "child %i died: killed by %s", i->proc->child_pid, g_strsignal(WTERMSIG(w->rstatus)));
|
|
} else {
|
|
ERROR(i->srv, "child %i died with unexpected stat_val %i", i->proc->child_pid, w->rstatus);
|
|
}
|
|
news = LI_INSTANCE_FINISHED;
|
|
} else {
|
|
if (WIFEXITED(w->rstatus)) {
|
|
ERROR(i->srv, "child %i died with exit status %i", i->proc->child_pid, WEXITSTATUS(w->rstatus));
|
|
} else if (WIFSIGNALED(w->rstatus)) {
|
|
ERROR(i->srv, "child %i died: killed by %s", i->proc->child_pid, g_strsignal(WTERMSIG(w->rstatus)));
|
|
} else {
|
|
ERROR(i->srv, "child %i died with unexpected stat_val %i", i->proc->child_pid, w->rstatus);
|
|
}
|
|
if (i->s_cur == LI_INSTANCE_DOWN) {
|
|
ERROR(i->srv, "spawning child %i failed, not restarting", i->proc->child_pid);
|
|
news = i->s_dest = LI_INSTANCE_FINISHED; /* TODO: retry spawn later? */
|
|
} else {
|
|
news = LI_INSTANCE_DOWN;
|
|
}
|
|
}
|
|
li_proc_free(i->proc);
|
|
i->proc = NULL;
|
|
li_angel_connection_free(i->acon);
|
|
i->acon = NULL;
|
|
ev_child_stop(loop, w);
|
|
li_instance_state_reached(i, news);
|
|
li_instance_release(i);
|
|
}
|
|
|
|
static void instance_spawn_setup(gpointer ctx) {
|
|
int *confd = ctx;
|
|
|
|
if (confd[1] != 0) {
|
|
dup2(confd[1], 0);
|
|
close(confd[1]);
|
|
}
|
|
|
|
dup2(STDERR_FILENO, STDOUT_FILENO);
|
|
}
|
|
|
|
static void instance_spawn(liInstance *i) {
|
|
int confd[2];
|
|
if (-1 == socketpair(AF_UNIX, SOCK_STREAM, 0, confd)) {
|
|
ERROR(i->srv, "socketpair error, cannot spawn instance: %s", g_strerror(errno));
|
|
return;
|
|
}
|
|
li_fd_init(confd[0]);
|
|
li_fd_no_block(confd[1]);
|
|
|
|
i->acon = li_angel_connection_new(i->srv->loop, confd[0], i, instance_angel_call_cb, instance_angel_close_cb);
|
|
i->proc = li_proc_new(i->srv, i->ic->cmd, i->ic->env, i->ic->uid, i->ic->gid, i->ic->username->str, i->ic->rlim_core, i->ic->rlim_nofile, instance_spawn_setup, confd);
|
|
|
|
if (!i->proc) return;
|
|
|
|
close(confd[1]);
|
|
ev_child_set(&i->child_watcher, i->proc->child_pid, 0);
|
|
ev_child_start(i->srv->loop, &i->child_watcher);
|
|
i->s_cur = LI_INSTANCE_DOWN;
|
|
li_instance_acquire(i);
|
|
DEBUG(i->srv, "Instance (%i) spawned: %s", i->proc->child_pid, i->ic->cmd[0]);
|
|
}
|
|
|
|
liInstance* li_server_new_instance(liServer *srv, liInstanceConf *ic) {
|
|
liInstance *i;
|
|
|
|
i = g_slice_new0(liInstance);
|
|
i->refcount = 1;
|
|
i->srv = srv;
|
|
li_instance_conf_acquire(ic);
|
|
i->ic = ic;
|
|
i->s_cur = i->s_dest = LI_INSTANCE_DOWN;
|
|
ev_child_init(&i->child_watcher, instance_child_cb, -1, 0);
|
|
i->child_watcher.data = i;
|
|
|
|
return i;
|
|
}
|
|
|
|
void li_instance_replace(liInstance *oldi, liInstance *newi) {
|
|
/* TODO ??? */
|
|
}
|
|
|
|
void li_instance_set_state(liInstance *i, liInstanceState s) {
|
|
if (i->s_dest == s) return;
|
|
switch (s) {
|
|
case LI_INSTANCE_DOWN:
|
|
case LI_INSTANCE_SUSPENDING:
|
|
ERROR(i->srv, "Invalid destination state %i", s);
|
|
return; /* cannot set this */
|
|
case LI_INSTANCE_WARMUP:
|
|
case LI_INSTANCE_SUSPENDED:
|
|
case LI_INSTANCE_RUNNING:
|
|
case LI_INSTANCE_FINISHED:
|
|
break;
|
|
}
|
|
i->s_dest = s;
|
|
if (!i->proc && LI_INSTANCE_FINISHED != s) {
|
|
instance_spawn(i);
|
|
} else {
|
|
GError *error = NULL;
|
|
|
|
switch (s) {
|
|
case LI_INSTANCE_DOWN:
|
|
case LI_INSTANCE_SUSPENDING:
|
|
break; /* cannot be set */
|
|
case LI_INSTANCE_WARMUP:
|
|
li_angel_send_simple_call(i->acon, CONST_STR_LEN("core"), CONST_STR_LEN("warmup"), NULL, &error);
|
|
break;
|
|
case LI_INSTANCE_SUSPENDED:
|
|
li_angel_send_simple_call(i->acon, CONST_STR_LEN("core"), CONST_STR_LEN("suspend"), NULL, &error);
|
|
break;
|
|
case LI_INSTANCE_RUNNING:
|
|
li_angel_send_simple_call(i->acon, CONST_STR_LEN("core"), CONST_STR_LEN("run"), NULL, &error);
|
|
break;
|
|
case LI_INSTANCE_FINISHED:
|
|
if (i->proc) {
|
|
kill(i->proc->child_pid, SIGTERM);
|
|
} else {
|
|
li_instance_state_reached(i, LI_INSTANCE_FINISHED);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (error) {
|
|
GERROR(i->srv, error, "set state %i failed, killing instance:", s);
|
|
g_error_free(error);
|
|
if (i->proc) {
|
|
kill(i->proc->child_pid, SIGTERM);
|
|
} else {
|
|
li_instance_state_reached(i, LI_INSTANCE_FINISHED);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void li_instance_state_reached(liInstance *i, liInstanceState s) {
|
|
GError *error = NULL;
|
|
|
|
i->s_cur = s;
|
|
switch (s) {
|
|
case LI_INSTANCE_DOWN:
|
|
/* last child died */
|
|
if (i->s_dest == LI_INSTANCE_FINISHED) {
|
|
i->s_cur = LI_INSTANCE_FINISHED;
|
|
} else {
|
|
instance_spawn(i);
|
|
}
|
|
break;
|
|
case LI_INSTANCE_SUSPENDED:
|
|
switch (i->s_dest) {
|
|
case LI_INSTANCE_DOWN:
|
|
break; /* impossible */
|
|
case LI_INSTANCE_SUSPENDED:
|
|
break;
|
|
case LI_INSTANCE_WARMUP:
|
|
/* make sure we move to SILENT after we spawned the instance */
|
|
li_angel_send_simple_call(i->acon, CONST_STR_LEN("core"), CONST_STR_LEN("warmup"), NULL, &error);
|
|
break;
|
|
case LI_INSTANCE_RUNNING:
|
|
/* make sure we move to RUNNING after we spawned the instance */
|
|
li_angel_send_simple_call(i->acon, CONST_STR_LEN("core"), CONST_STR_LEN("run"), NULL, &error);
|
|
break;
|
|
case LI_INSTANCE_SUSPENDING:
|
|
case LI_INSTANCE_FINISHED:
|
|
break; /* nothing to do, instance should already know what to do */
|
|
}
|
|
break;
|
|
case LI_INSTANCE_WARMUP:
|
|
/* TODO: replace another instance? */
|
|
break;
|
|
case LI_INSTANCE_RUNNING:
|
|
/* nothing to do, instance should already know what to do */
|
|
break;
|
|
case LI_INSTANCE_SUSPENDING:
|
|
/* nothing to do, instance should already know what to do */
|
|
break;
|
|
case LI_INSTANCE_FINISHED:
|
|
if (i->s_dest != LI_INSTANCE_FINISHED) {
|
|
/* TODO: replacing another instance failed? */
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (error) {
|
|
GERROR(i->srv, error, "reaching state %i failed, killing instance:", s);
|
|
g_error_free(error);
|
|
if (i->proc) {
|
|
kill(i->proc->child_pid, SIGTERM);
|
|
} else {
|
|
li_instance_state_reached(i, LI_INSTANCE_FINISHED);
|
|
}
|
|
}
|
|
}
|
|
|
|
void li_instance_release(liInstance *i) {
|
|
liServer *srv;
|
|
liInstance *t;
|
|
if (!i) return;
|
|
srv = i->srv;
|
|
|
|
g_assert(g_atomic_int_get(&i->refcount) > 0);
|
|
|
|
if (!g_atomic_int_dec_and_test(&i->refcount)) return;
|
|
g_assert(!i->proc);
|
|
|
|
DEBUG(srv, "%s", "instance released");
|
|
|
|
li_instance_conf_release(i->ic);
|
|
i->ic = NULL;
|
|
|
|
t = i->replace; i->replace = NULL;
|
|
li_instance_release(t);
|
|
|
|
t = i->replace_by; i->replace_by = NULL;
|
|
li_instance_release(t);
|
|
|
|
g_slice_free(liInstance, i);
|
|
}
|
|
|
|
void li_instance_acquire(liInstance *i) {
|
|
assert(g_atomic_int_get(&i->refcount) > 0);
|
|
g_atomic_int_inc(&i->refcount);
|
|
}
|
|
|
|
liInstanceConf* li_instance_conf_new(gchar **cmd, gchar **env, GString *username, uid_t uid, gid_t gid, gint64 rlim_core, gint64 rlim_nofile) {
|
|
liInstanceConf *ic = g_slice_new0(liInstanceConf);
|
|
ic->refcount = 1;
|
|
ic->cmd = cmd;
|
|
ic->env = env;
|
|
if (username) {
|
|
ic->username = g_string_new_len(GSTR_LEN(username));
|
|
}
|
|
ic->uid = uid;
|
|
ic->gid = gid;
|
|
ic->rlim_core = rlim_core;
|
|
ic->rlim_nofile = rlim_nofile;
|
|
return ic;
|
|
}
|
|
|
|
void li_instance_conf_release(liInstanceConf *ic) {
|
|
if (!ic) return;
|
|
assert(g_atomic_int_get(&ic->refcount) > 0);
|
|
if (!g_atomic_int_dec_and_test(&ic->refcount)) return;
|
|
g_strfreev(ic->cmd);
|
|
g_strfreev(ic->env);
|
|
g_slice_free(liInstanceConf, ic);
|
|
}
|
|
|
|
void li_instance_conf_acquire(liInstanceConf *ic) {
|
|
assert(g_atomic_int_get(&ic->refcount) > 0);
|
|
g_atomic_int_inc(&ic->refcount);
|
|
}
|