File 0013-0022-PLESK-missed-kill.patch of Package scl-php73

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File 0013-0022-PLESK-missed-kill.patch of Package scl-php73 (Revision 998170c92713372cb957e73b8c57831d)

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Julian Brown <julian.brown@cpanel.net>
Date: Tue, 7 May 2019 12:18:27 -0500
Subject: [PATCH 13/14] 0022-PLESK-missed-kill

Third of 3 patches for signal management.
---
 sapi/fpm/fpm/fpm_process_ctl.c      |   2 +-
 sapi/fpm/fpm/fpm_process_ctl.c.orig | 540 ++++++++++++++++++++++++++++
 2 files changed, 541 insertions(+), 1 deletion(-)
 create mode 100644 sapi/fpm/fpm/fpm_process_ctl.c.orig

diff --git a/sapi/fpm/fpm/fpm_process_ctl.c b/sapi/fpm/fpm/fpm_process_ctl.c
index 2bc0017..d3b5fa3 100644
--- a/sapi/fpm/fpm/fpm_process_ctl.c
+++ b/sapi/fpm/fpm/fpm_process_ctl.c
@@ -57,7 +57,7 @@ static void fpm_pctl_action(struct fpm_event_s *ev, short which, void *arg) /* {
 
 static int fpm_pctl_timeout_set(int sec) /* {{{ */
 {
-	fpm_event_set_timer(&pctl_event, 0, &fpm_pctl_action, NULL);
+	fpm_event_set_timer(&pctl_event, FPM_EV_PERSIST, &fpm_pctl_action, NULL);
 	fpm_event_add(&pctl_event, sec * 1000);
 	return 0;
 }
diff --git a/sapi/fpm/fpm/fpm_process_ctl.c.orig b/sapi/fpm/fpm/fpm_process_ctl.c.orig
new file mode 100644
index 0000000..28b59b3
--- /dev/null
+++ b/sapi/fpm/fpm/fpm_process_ctl.c.orig
@@ -0,0 +1,540 @@
+	/* (c) 2007,2008 Andrei Nigmatulin */
+
+#include "fpm_config.h"
+
+#include <sys/types.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "fpm.h"
+#include "fpm_clock.h"
+#include "fpm_children.h"
+#include "fpm_signals.h"
+#include "fpm_events.h"
+#include "fpm_process_ctl.h"
+#include "fpm_cleanup.h"
+#include "fpm_request.h"
+#include "fpm_worker_pool.h"
+#include "fpm_scoreboard.h"
+#include "fpm_sockets.h"
+#include "zlog.h"
+
+
+static int fpm_state = FPM_PCTL_STATE_NORMAL;
+static int fpm_signal_sent = 0;
+
+
+static const char *fpm_state_names[] = {
+	[FPM_PCTL_STATE_NORMAL] = "normal",
+	[FPM_PCTL_STATE_RELOADING] = "reloading",
+	[FPM_PCTL_STATE_TERMINATING] = "terminating",
+	[FPM_PCTL_STATE_FINISHING] = "finishing"
+};
+
+static int saved_argc;
+static char **saved_argv;
+
+static void fpm_pctl_cleanup(int which, void *arg) /* {{{ */
+{
+	int i;
+	if (which != FPM_CLEANUP_PARENT_EXEC) {
+		for (i = 0; i < saved_argc; i++) {
+			free(saved_argv[i]);
+		}
+		free(saved_argv);
+	}
+}
+/* }}} */
+
+static struct fpm_event_s pctl_event;
+
+static void fpm_pctl_action(struct fpm_event_s *ev, short which, void *arg) /* {{{ */
+{
+	fpm_pctl(FPM_PCTL_STATE_UNSPECIFIED, FPM_PCTL_ACTION_TIMEOUT);
+}
+/* }}} */
+
+static int fpm_pctl_timeout_set(int sec) /* {{{ */
+{
+	fpm_event_set_timer(&pctl_event, 0, &fpm_pctl_action, NULL);
+	fpm_event_add(&pctl_event, sec * 1000);
+	return 0;
+}
+/* }}} */
+
+static void fpm_pctl_exit() /* {{{ */
+{
+	zlog(ZLOG_NOTICE, "exiting, bye-bye!");
+
+	fpm_conf_unlink_pid();
+	fpm_cleanups_run(FPM_CLEANUP_PARENT_EXIT_MAIN);
+	exit(FPM_EXIT_OK);
+}
+/* }}} */
+
+#define optional_arg(c) (saved_argc > c ? ", \"" : ""), (saved_argc > c ? saved_argv[c] : ""), (saved_argc > c ? "\"" : "")
+
+static void fpm_pctl_exec() /* {{{ */
+{
+	zlog(ZLOG_DEBUG, "Blocking some signals before reexec");
+	if (0 > fpm_signals_block()) {
+		zlog(ZLOG_WARNING, "concurrent reloads may be unstable");
+	}
+
+	zlog(ZLOG_NOTICE, "reloading: execvp(\"%s\", {\"%s\""
+			"%s%s%s" "%s%s%s" "%s%s%s" "%s%s%s" "%s%s%s"
+			"%s%s%s" "%s%s%s" "%s%s%s" "%s%s%s" "%s%s%s"
+		"})",
+		saved_argv[0], saved_argv[0],
+		optional_arg(1),
+		optional_arg(2),
+		optional_arg(3),
+		optional_arg(4),
+		optional_arg(5),
+		optional_arg(6),
+		optional_arg(7),
+		optional_arg(8),
+		optional_arg(9),
+		optional_arg(10)
+	);
+
+	fpm_cleanups_run(FPM_CLEANUP_PARENT_EXEC);
+	execvp(saved_argv[0], saved_argv);
+	zlog(ZLOG_SYSERROR, "failed to reload: execvp() failed");
+	exit(FPM_EXIT_SOFTWARE);
+}
+/* }}} */
+
+static void fpm_pctl_action_last() /* {{{ */
+{
+	switch (fpm_state) {
+		case FPM_PCTL_STATE_RELOADING:
+			fpm_pctl_exec();
+			break;
+
+		case FPM_PCTL_STATE_FINISHING:
+		case FPM_PCTL_STATE_TERMINATING:
+			fpm_pctl_exit();
+			break;
+	}
+}
+/* }}} */
+
+int fpm_pctl_kill(pid_t pid, int how) /* {{{ */
+{
+	int s = 0;
+
+	switch (how) {
+		case FPM_PCTL_TERM :
+			s = SIGTERM;
+			break;
+		case FPM_PCTL_STOP :
+			s = SIGSTOP;
+			break;
+		case FPM_PCTL_CONT :
+			s = SIGCONT;
+			break;
+		case FPM_PCTL_QUIT :
+			s = SIGQUIT;
+			break;
+		default :
+			break;
+	}
+	return kill(pid, s);
+}
+/* }}} */
+
+void fpm_pctl_kill_all(int signo) /* {{{ */
+{
+	struct fpm_worker_pool_s *wp;
+	int alive_children = 0;
+
+	for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
+		struct fpm_child_s *child;
+
+		for (child = wp->children; child; child = child->next) {
+			int res = kill(child->pid, signo);
+
+			zlog(ZLOG_DEBUG, "[pool %s] sending signal %d %s to child %d",
+				child->wp->config->name, signo,
+				fpm_signal_names[signo] ? fpm_signal_names[signo] : "", (int) child->pid);
+
+			if (res == 0) {
+				++alive_children;
+			}
+		}
+	}
+
+	if (alive_children) {
+		zlog(ZLOG_DEBUG, "%d child(ren) still alive", alive_children);
+	}
+}
+/* }}} */
+
+static void fpm_pctl_action_next() /* {{{ */
+{
+	int sig, timeout;
+
+	if (!fpm_globals.running_children) {
+		fpm_pctl_action_last();
+	}
+
+	if (fpm_signal_sent == 0) {
+		if (fpm_state == FPM_PCTL_STATE_TERMINATING) {
+			sig = SIGTERM;
+		} else {
+			sig = SIGQUIT;
+		}
+		timeout = fpm_global_config.process_control_timeout;
+	} else {
+		if (fpm_signal_sent == SIGQUIT) {
+			sig = SIGTERM;
+		} else {
+			sig = SIGKILL;
+		}
+		timeout = 1;
+	}
+
+	fpm_pctl_kill_all(sig);
+	fpm_signal_sent = sig;
+	fpm_pctl_timeout_set(timeout);
+}
+/* }}} */
+
+void fpm_pctl(int new_state, int action) /* {{{ */
+{
+	switch (action) {
+		case FPM_PCTL_ACTION_SET :
+			if (fpm_state == new_state) { /* already in progress - just ignore duplicate signal */
+				return;
+			}
+
+			switch (fpm_state) { /* check which states can be overridden */
+				case FPM_PCTL_STATE_NORMAL :
+					/* 'normal' can be overridden by any other state */
+					break;
+				case FPM_PCTL_STATE_RELOADING :
+					/* 'reloading' can be overridden by 'finishing' */
+					if (new_state == FPM_PCTL_STATE_FINISHING) break;
+				case FPM_PCTL_STATE_FINISHING :
+					/* 'reloading' and 'finishing' can be overridden by 'terminating' */
+					if (new_state == FPM_PCTL_STATE_TERMINATING) break;
+				case FPM_PCTL_STATE_TERMINATING :
+					/* nothing can override 'terminating' state */
+					zlog(ZLOG_DEBUG, "not switching to '%s' state, because already in '%s' state",
+						fpm_state_names[new_state], fpm_state_names[fpm_state]);
+					return;
+			}
+
+			fpm_signal_sent = 0;
+			fpm_state = new_state;
+
+			zlog(ZLOG_DEBUG, "switching to '%s' state", fpm_state_names[fpm_state]);
+			/* fall down */
+
+		case FPM_PCTL_ACTION_TIMEOUT :
+			fpm_pctl_action_next();
+			break;
+		case FPM_PCTL_ACTION_LAST_CHILD_EXITED :
+			fpm_pctl_action_last();
+			break;
+
+	}
+}
+/* }}} */
+
+int fpm_pctl_can_spawn_children() /* {{{ */
+{
+	return fpm_state == FPM_PCTL_STATE_NORMAL;
+}
+/* }}} */
+
+int fpm_pctl_child_exited() /* {{{ */
+{
+	if (fpm_state == FPM_PCTL_STATE_NORMAL) {
+		return 0;
+	}
+
+	if (!fpm_globals.running_children) {
+		fpm_pctl(FPM_PCTL_STATE_UNSPECIFIED, FPM_PCTL_ACTION_LAST_CHILD_EXITED);
+	}
+	return 0;
+}
+/* }}} */
+
+int fpm_pctl_init_main() /* {{{ */
+{
+	int i;
+
+	saved_argc = fpm_globals.argc;
+	saved_argv = malloc(sizeof(char *) * (saved_argc + 1));
+
+	if (!saved_argv) {
+		return -1;
+	}
+
+	for (i = 0; i < saved_argc; i++) {
+		saved_argv[i] = strdup(fpm_globals.argv[i]);
+
+		if (!saved_argv[i]) {
+			return -1;
+		}
+	}
+
+	saved_argv[i] = 0;
+
+	if (0 > fpm_cleanup_add(FPM_CLEANUP_ALL, fpm_pctl_cleanup, 0)) {
+		return -1;
+	}
+	return 0;
+}
+/* }}} */
+
+static void fpm_pctl_check_request_timeout(struct timeval *now) /* {{{ */
+{
+	struct fpm_worker_pool_s *wp;
+
+	for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
+		int terminate_timeout = wp->config->request_terminate_timeout;
+		int slowlog_timeout = wp->config->request_slowlog_timeout;
+		struct fpm_child_s *child;
+
+		if (terminate_timeout || slowlog_timeout) {
+			for (child = wp->children; child; child = child->next) {
+				fpm_request_check_timed_out(child, now, terminate_timeout, slowlog_timeout);
+			}
+		}
+	}
+}
+/* }}} */
+
+static void fpm_pctl_perform_idle_server_maintenance(struct timeval *now) /* {{{ */
+{
+	struct fpm_worker_pool_s *wp;
+
+	for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
+		struct fpm_child_s *child;
+		struct fpm_child_s *last_idle_child = NULL;
+		int idle = 0;
+		int active = 0;
+		int children_to_fork;
+		unsigned cur_lq = 0;
+
+		if (wp->config == NULL) continue;
+
+		for (child = wp->children; child; child = child->next) {
+			if (fpm_request_is_idle(child)) {
+				if (last_idle_child == NULL) {
+					last_idle_child = child;
+				} else {
+					if (timercmp(&child->started, &last_idle_child->started, <)) {
+						last_idle_child = child;
+					}
+				}
+				idle++;
+			} else {
+				active++;
+			}
+		}
+
+		/* update status structure for all PMs */
+		if (wp->listen_address_domain == FPM_AF_INET) {
+			if (0 > fpm_socket_get_listening_queue(wp->listening_socket, &cur_lq, NULL)) {
+				cur_lq = 0;
+#if 0
+			} else {
+				if (cur_lq > 0) {
+					if (!wp->warn_lq) {
+						zlog(ZLOG_WARNING, "[pool %s] listening queue is not empty, #%d requests are waiting to be served, consider raising pm.max_children setting (%d)", wp->config->name, cur_lq, wp->config->pm_max_children);
+						wp->warn_lq = 1;
+					}
+				} else {
+					wp->warn_lq = 0;
+				}
+#endif
+			}
+		}
+		fpm_scoreboard_update(idle, active, cur_lq, -1, -1, -1, 0, FPM_SCOREBOARD_ACTION_SET, wp->scoreboard);
+
+		/* this is specific to PM_STYLE_ONDEMAND */
+		if (wp->config->pm == PM_STYLE_ONDEMAND) {
+			struct timeval last, now;
+
+			zlog(ZLOG_DEBUG, "[pool %s] currently %d active children, %d spare children", wp->config->name, active, idle);
+
+			if (!last_idle_child) continue;
+
+			fpm_request_last_activity(last_idle_child, &last);
+			fpm_clock_get(&now);
+			if (last.tv_sec < now.tv_sec - wp->config->pm_process_idle_timeout) {
+				last_idle_child->idle_kill = 1;
+				fpm_pctl_kill(last_idle_child->pid, FPM_PCTL_QUIT);
+			}
+
+			continue;
+		}
+
+		/* the rest is only used by PM_STYLE_DYNAMIC */
+		if (wp->config->pm != PM_STYLE_DYNAMIC) continue;
+
+		zlog(ZLOG_DEBUG, "[pool %s] currently %d active children, %d spare children, %d running children. Spawning rate %d", wp->config->name, active, idle, wp->running_children, wp->idle_spawn_rate);
+
+		if (idle > wp->config->pm_max_spare_servers && last_idle_child) {
+			last_idle_child->idle_kill = 1;
+			fpm_pctl_kill(last_idle_child->pid, FPM_PCTL_QUIT);
+			wp->idle_spawn_rate = 1;
+			continue;
+		}
+
+		if (idle < wp->config->pm_min_spare_servers) {
+			if (wp->running_children >= wp->config->pm_max_children) {
+				if (!wp->warn_max_children) {
+					fpm_scoreboard_update(0, 0, 0, 0, 0, 1, 0, FPM_SCOREBOARD_ACTION_INC, wp->scoreboard);
+					zlog(ZLOG_WARNING, "[pool %s] server reached pm.max_children setting (%d), consider raising it", wp->config->name, wp->config->pm_max_children);
+					wp->warn_max_children = 1;
+				}
+				wp->idle_spawn_rate = 1;
+				continue;
+			}
+
+			if (wp->idle_spawn_rate >= 8) {
+				zlog(ZLOG_WARNING, "[pool %s] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning %d children, there are %d idle, and %d total children", wp->config->name, wp->idle_spawn_rate, idle, wp->running_children);
+			}
+
+			/* compute the number of idle process to spawn */
+			children_to_fork = MIN(wp->idle_spawn_rate, wp->config->pm_min_spare_servers - idle);
+
+			/* get sure it won't exceed max_children */
+			children_to_fork = MIN(children_to_fork, wp->config->pm_max_children - wp->running_children);
+			if (children_to_fork <= 0) {
+				if (!wp->warn_max_children) {
+					fpm_scoreboard_update(0, 0, 0, 0, 0, 1, 0, FPM_SCOREBOARD_ACTION_INC, wp->scoreboard);
+					zlog(ZLOG_WARNING, "[pool %s] server reached pm.max_children setting (%d), consider raising it", wp->config->name, wp->config->pm_max_children);
+					wp->warn_max_children = 1;
+				}
+				wp->idle_spawn_rate = 1;
+				continue;
+			}
+			wp->warn_max_children = 0;
+
+			fpm_children_make(wp, 1, children_to_fork, 1);
+
+			/* if it's a child, stop here without creating the next event
+			 * this event is reserved to the master process
+			 */
+			if (fpm_globals.is_child) {
+				return;
+			}
+
+			zlog(ZLOG_DEBUG, "[pool %s] %d child(ren) have been created dynamically", wp->config->name, children_to_fork);
+
+			/* Double the spawn rate for the next iteration */
+			if (wp->idle_spawn_rate < FPM_MAX_SPAWN_RATE) {
+				wp->idle_spawn_rate *= 2;
+			}
+			continue;
+		}
+		wp->idle_spawn_rate = 1;
+	}
+}
+/* }}} */
+
+void fpm_pctl_heartbeat(struct fpm_event_s *ev, short which, void *arg) /* {{{ */
+{
+	static struct fpm_event_s heartbeat;
+	struct timeval now;
+
+	if (fpm_globals.parent_pid != getpid()) {
+		return; /* sanity check */
+	}
+
+	if (which == FPM_EV_TIMEOUT) {
+		fpm_clock_get(&now);
+		fpm_pctl_check_request_timeout(&now);
+		return;
+	}
+
+	/* ensure heartbeat is not lower than FPM_PCTL_MIN_HEARTBEAT */
+	fpm_globals.heartbeat = MAX(fpm_globals.heartbeat, FPM_PCTL_MIN_HEARTBEAT);
+
+	/* first call without setting to initialize the timer */
+	zlog(ZLOG_DEBUG, "heartbeat have been set up with a timeout of %dms", fpm_globals.heartbeat);
+	fpm_event_set_timer(&heartbeat, FPM_EV_PERSIST, &fpm_pctl_heartbeat, NULL);
+	fpm_event_add(&heartbeat, fpm_globals.heartbeat);
+}
+/* }}} */
+
+void fpm_pctl_perform_idle_server_maintenance_heartbeat(struct fpm_event_s *ev, short which, void *arg) /* {{{ */
+{
+	static struct fpm_event_s heartbeat;
+	struct timeval now;
+
+	if (fpm_globals.parent_pid != getpid()) {
+		return; /* sanity check */
+	}
+
+	if (which == FPM_EV_TIMEOUT) {
+		fpm_clock_get(&now);
+		if (fpm_pctl_can_spawn_children()) {
+			fpm_pctl_perform_idle_server_maintenance(&now);
+
+			/* if it's a child, stop here without creating the next event
+			 * this event is reserved to the master process
+			 */
+			if (fpm_globals.is_child) {
+				return;
+			}
+		}
+		return;
+	}
+
+	/* first call without setting which to initialize the timer */
+	fpm_event_set_timer(&heartbeat, FPM_EV_PERSIST, &fpm_pctl_perform_idle_server_maintenance_heartbeat, NULL);
+	fpm_event_add(&heartbeat, FPM_IDLE_SERVER_MAINTENANCE_HEARTBEAT);
+}
+/* }}} */
+
+void fpm_pctl_on_socket_accept(struct fpm_event_s *ev, short which, void *arg) /* {{{ */
+{
+	struct fpm_worker_pool_s *wp = (struct fpm_worker_pool_s *)arg;
+	struct fpm_child_s *child;
+
+
+	if (fpm_globals.parent_pid != getpid()) {
+		/* prevent a event race condition when child process
+		 * have not set up its own event loop */
+		return;
+	}
+
+	wp->socket_event_set = 0;
+
+/*	zlog(ZLOG_DEBUG, "[pool %s] heartbeat running_children=%d", wp->config->name, wp->running_children);*/
+
+	if (wp->running_children >= wp->config->pm_max_children) {
+		if (!wp->warn_max_children) {
+			fpm_scoreboard_update(0, 0, 0, 0, 0, 1, 0, FPM_SCOREBOARD_ACTION_INC, wp->scoreboard);
+			zlog(ZLOG_WARNING, "[pool %s] server reached max_children setting (%d), consider raising it", wp->config->name, wp->config->pm_max_children);
+			wp->warn_max_children = 1;
+		}
+
+		return;
+	}
+
+	for (child = wp->children; child; child = child->next) {
+		/* if there is at least on idle child, it will handle the connection, stop here */
+		if (fpm_request_is_idle(child)) {
+			return;
+		}
+	}
+
+	wp->warn_max_children = 0;
+	fpm_children_make(wp, 1, 1, 1);
+
+	if (fpm_globals.is_child) {
+		return;
+	}
+
+	zlog(ZLOG_DEBUG, "[pool %s] got accept without idle child available .... I forked", wp->config->name);
+}
+/* }}} */

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File 0013-0022-PLESK-missed-kill.patch of Package scl-php73 (Revision 998170c92713372cb957e73b8c57831d)

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