File xen.976ce01e103fc03bb3336cdbc6c951a709e285fe.patch of Package xen

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File xen.976ce01e103fc03bb3336cdbc6c951a709e285fe.patch of Package xen (Revision 3b077056294bcb49994ea3227248b4ad)

Currently displaying revision 3b077056294bcb49994ea3227248b4ad , Show latest

From: Juergen Gross <jgross@suse.com>
Date: Tue, 2 Aug 2016 18:10:44 +0200
Subject: 976ce01e103fc03bb3336cdbc6c951a709e285fe

tools: remove systemd xenstore socket definitions

On a system with systemd the xenstore sockets are created via systemd.
Remove the related configuration files in order to be able to decide
at runtime whether the sockets should be created or not. This will
enable Xen to start xenstore either via a daemon or via a stub domain.

As the xenstore domain start program will exit after it has done its
job prepare the same behaviour to be tolerated by systemd for the
xenstore daemon by specifying the appropriate flags in the service
file.

A rerun of autogen.sh is required.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: David Scott <dave@recoil.org>
---
 tools/configure.ac                                 |  2 --
 tools/hotplug/Linux/systemd/Makefile               |  5 ----
 tools/hotplug/Linux/systemd/xenstored.service.in   |  5 ++--
 tools/hotplug/Linux/systemd/xenstored.socket.in    | 13 -----------
 tools/hotplug/Linux/systemd/xenstored_ro.socket.in | 13 -----------
 tools/ocaml/xenstored/systemd.ml                   |  2 --
 tools/ocaml/xenstored/systemd.mli                  |  8 -------
 tools/ocaml/xenstored/systemd_stubs.c              | 98 -------------------------------------------------------------------------------
 tools/ocaml/xenstored/utils.ml                     |  9 +-------
 tools/xenstore/xenstored_core.c                    | 91 +++----------------------------------------------------------------------
 10 files changed, 7 insertions(+), 239 deletions(-)
 delete mode 100644 tools/hotplug/Linux/systemd/xenstored.socket.in
 delete mode 100644 tools/hotplug/Linux/systemd/xenstored_ro.socket.in

--- a/tools/configure.ac
+++ b/tools/configure.ac
@@ -11,26 +11,24 @@ hotplug/FreeBSD/rc.d/xencommons
 hotplug/Linux/init.d/sysconfig.xencommons
 hotplug/Linux/init.d/xen-watchdog
 hotplug/Linux/init.d/xencommons
 hotplug/Linux/init.d/xendomains
 hotplug/Linux/systemd/proc-xen.mount
 hotplug/Linux/systemd/var-lib-xenstored.mount
 hotplug/Linux/systemd/xen-init-dom0.service
 hotplug/Linux/systemd/xen-qemu-dom0-disk-backend.service
 hotplug/Linux/systemd/xen-watchdog.service
 hotplug/Linux/systemd/xenconsoled.service
 hotplug/Linux/systemd/xendomains.service
 hotplug/Linux/systemd/xenstored.service
-hotplug/Linux/systemd/xenstored.socket
-hotplug/Linux/systemd/xenstored_ro.socket
 hotplug/Linux/vif-setup
 hotplug/Linux/xen-backend.rules
 hotplug/Linux/xen-hotplug-common.sh
 hotplug/Linux/xendomains
 hotplug/NetBSD/rc.d/xencommons
 ])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR([../])
 
 # Check if CFLAGS, LDFLAGS, LIBS, CPPFLAGS or CPP is set and print a warning
 
 AS_IF([test -n "$CC$CFLAGS$LDFLAGS$LIBS$CPPFLAGS$CPP"], [
--- a/tools/hotplug/Linux/systemd/Makefile
+++ b/tools/hotplug/Linux/systemd/Makefile
@@ -1,47 +1,42 @@
 XEN_ROOT = $(CURDIR)/../../../..
 include $(XEN_ROOT)/tools/Rules.mk
 
 XEN_SYSTEMD_MODULES = xen.conf
 
 XEN_SYSTEMD_MOUNT =  proc-xen.mount
 XEN_SYSTEMD_MOUNT += var-lib-xenstored.mount
 
-XEN_SYSTEMD_SOCKET  = xenstored.socket
-XEN_SYSTEMD_SOCKET += xenstored_ro.socket
-
 XEN_SYSTEMD_SERVICE  = xenstored.service
 XEN_SYSTEMD_SERVICE += xenconsoled.service
 XEN_SYSTEMD_SERVICE += xen-qemu-dom0-disk-backend.service
 XEN_SYSTEMD_SERVICE += xendomains.service
 XEN_SYSTEMD_SERVICE += xen-watchdog.service
 XEN_SYSTEMD_SERVICE += xen-init-dom0.service
 
 ALL_XEN_SYSTEMD =	$(XEN_SYSTEMD_MODULES)  \
 			$(XEN_SYSTEMD_MOUNT)	\
-			$(XEN_SYSTEMD_SOCKET)	\
 			$(XEN_SYSTEMD_SERVICE)
 
 .PHONY: all
 all:	$(ALL_XEN_SYSTEMD)
 
 .PHONY: clean
 clean:
 	rm -f $(XEN_SYSTEMD_MODULES)
 
 .PHONY: install
 install: $(ALL_XEN_SYSTEMD)
 	[ -d $(DESTDIR)$(XEN_SYSTEMD_DIR) ] || \
 		$(INSTALL_DIR) $(DESTDIR)$(XEN_SYSTEMD_DIR)
 	[ -d $(DESTDIR)$(XEN_SYSTEMD_MODULES_LOAD) ] || \
 		$(INSTALL_DIR) $(DESTDIR)$(XEN_SYSTEMD_MODULES_LOAD)
-	$(INSTALL_DATA) *.socket $(DESTDIR)$(XEN_SYSTEMD_DIR)
 	$(INSTALL_DATA) *.service $(DESTDIR)$(XEN_SYSTEMD_DIR)
 	$(INSTALL_DATA) *.mount $(DESTDIR)$(XEN_SYSTEMD_DIR)
 	$(INSTALL_DATA) *.conf $(DESTDIR)$(XEN_SYSTEMD_MODULES_LOAD)
 
 $(XEN_SYSTEMD_MODULES):
 	rm -f $@.tmp
 	for mod in $(LINUX_BACKEND_MODULES) ; do \
 		echo $$mod ; \
 		done > $@.tmp
 	$(call move-if-changed,$@.tmp,$@)
--- a/tools/hotplug/Linux/systemd/xenstored.service.in
+++ b/tools/hotplug/Linux/systemd/xenstored.service.in
@@ -1,24 +1,25 @@
 [Unit]
 Description=The Xen xenstore
-Requires=xenstored_ro.socket xenstored.socket proc-xen.mount var-lib-xenstored.mount
+Requires=proc-xen.mount var-lib-xenstored.mount
 After=proc-xen.mount var-lib-xenstored.mount
 Before=libvirtd.service libvirt-guests.service
 RefuseManualStop=true
 ConditionPathExists=/proc/xen/capabilities
 
 [Service]
 Type=notify
+NotifyAccess=all
+RemainAfterExit=true
 KillMode=none
 Environment=XENSTORED_ARGS=
 Environment=XENSTORED=@XENSTORED@
 EnvironmentFile=-@CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons
 ExecStartPre=/bin/grep -q control_d /proc/xen/capabilities
 ExecStartPre=-/bin/rm -f @XEN_LIB_STORED@/tdb*
 ExecStartPre=/bin/mkdir -p @XEN_RUN_DIR@
 ExecStart=/bin/sh -c "exec $XENSTORED --no-fork $XENSTORED_ARGS"
 
 [Install]
 WantedBy=multi-user.target
-Also=xenstored_ro.socket xenstored.socket
 Also=proc-xen.mount
 Also=var-lib-xenstored.mount
deleted file mode 100644
--- a/tools/hotplug/Linux/systemd/xenstored.socket.in
+++ /dev/null
@@ -1,13 +0,0 @@
-[Unit]
-Description=xenstore socket
-Requires=proc-xen.mount var-lib-xenstored.mount
-After=proc-xen.mount var-lib-xenstored.mount
-ConditionPathExists=/proc/xen/capabilities
-
-[Socket]
-ListenStream=/var/run/xenstored/socket
-SocketMode=0600
-Service=xenstored.service
-
-[Install]
-WantedBy=sockets.target
deleted file mode 100644
--- a/tools/hotplug/Linux/systemd/xenstored_ro.socket.in
+++ /dev/null
@@ -1,13 +0,0 @@
-[Unit]
-Description=xenstore ro socket
-Requires=proc-xen.mount var-lib-xenstored.mount
-After=proc-xen.mount var-lib-xenstored.mount
-ConditionPathExists=/proc/xen/capabilities
-
-[Socket]
-ListenStream=/var/run/xenstored/socket_ro
-SocketMode=0660
-Service=xenstored.service
-
-[Install]
-WantedBy=sockets.target
--- a/tools/ocaml/xenstored/systemd.ml
+++ b/tools/ocaml/xenstored/systemd.ml
@@ -3,15 +3,13 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published
  * by the Free Software Foundation; version 2.1 only. with the special
  * exception on linking described in file LICENSE.
  *
  * This program 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 Lesser General Public License for more details.
  *)
 
-external sd_listen_fds: string -> Unix.file_descr = "ocaml_sd_listen_fds"
-external sd_booted: unit -> bool = "ocaml_sd_booted"
 external sd_notify_ready: unit -> unit = "ocaml_sd_notify_ready"
--- a/tools/ocaml/xenstored/systemd.mli
+++ b/tools/ocaml/xenstored/systemd.mli
@@ -3,22 +3,14 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published
  * by the Free Software Foundation; version 2.1 only. with the special
  * exception on linking described in file LICENSE.
  *
  * This program 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 Lesser General Public License for more details.
  *)
 
-(** Calls the C library sd_listen_fds() function for us. Although
- *  the library doesn't accept argument we send one over to help
- *  us do sanity checks on the expected sockets *)
-val sd_listen_fds: string -> Unix.file_descr
-
-(** Tells us whether or not systemd support was compiled in *)
-val sd_booted: unit -> bool
-
 (** Tells systemd we're ready *)
 external sd_notify_ready: unit -> unit = "ocaml_sd_notify_ready"
--- a/tools/ocaml/xenstored/systemd_stubs.c
+++ b/tools/ocaml/xenstored/systemd_stubs.c
@@ -17,136 +17,38 @@
 #include <stdbool.h>
 #include <errno.h>
 #include <caml/mlvalues.h>
 #include <caml/memory.h>
 #include <caml/alloc.h>
 #include <caml/custom.h>
 #include <caml/signals.h>
 #include <caml/fail.h>
 #include <config.h>
 
 #if defined(HAVE_SYSTEMD)
 
-#include <sys/socket.h>
 #include <systemd/sd-daemon.h>
 
-/* Will work regardless of the order systemd gives them to us */
-static int oxen_get_sd_fd(const char *connect_to)
-{
-	int fd = SD_LISTEN_FDS_START;
-	int r;
-
-	while (fd <= SD_LISTEN_FDS_START + 1) {
-		r = sd_is_socket_unix(fd, SOCK_STREAM, 1, connect_to, 0);
-		if (r > 0)
-			return fd;
-		fd++;
-	}
-
-	return -EBADR;
-}
-
-static int oxen_verify_socket_socket(const char *connect_to)
-{
-	if ((strcmp("/var/run/xenstored/socket_ro", connect_to) != 0) &&
-	    (strcmp("/var/run/xenstored/socket", connect_to) != 0)) {
-		sd_notifyf(0, "STATUS=unexpected socket: %s\n"
-			   "ERRNO=%i",
-			   connect_to,
-			   EBADR);
-		return -EBADR;
-	}
-
-	return oxen_get_sd_fd(connect_to);
-}
-
-CAMLprim value ocaml_sd_listen_fds(value connect_to)
-{
-	CAMLparam1(connect_to);
-	CAMLlocal1(sock_ret);
-	int sock = -EBADR, n;
-
-	n = sd_listen_fds(0);
-	if (n <= 0) {
-		sd_notifyf(0, "STATUS=Failed to get any active sockets: %s\n"
-			   "ERRNO=%i",
-			   strerror(errno),
-			   errno);
-		caml_failwith("ocaml_sd_listen_fds() failed to get any sockets");
-	} else if (n != 2) {
-		fprintf(stderr, SD_ERR "Expected 2 fds but given %d\n", n);
-		sd_notifyf(0, "STATUS=Mismatch on number (2): %s\n"
-			   "ERRNO=%d",
-			   strerror(EBADR),
-			   EBADR);
-		caml_failwith("ocaml_sd_listen_fds() mismatch");
-	}
-
-	sock = oxen_verify_socket_socket(String_val(connect_to));
-	if (sock <= 0) {
-		fprintf(stderr, "failed to verify sock %s\n",
-			String_val(connect_to));
-		caml_failwith("ocaml_sd_listen_fds_init() invalid socket");
-	}
-
-	sock_ret = Val_int(sock);
-
-	CAMLreturn(sock_ret);
-}
-
-CAMLprim value ocaml_sd_booted(value ignore)
-{
-	CAMLparam1(ignore);
-	CAMLlocal1(ret);
-
-	ret = Val_false;
-
-	if (sd_booted())
-		ret = Val_true;
-
-	CAMLreturn(ret);
-}
-
 CAMLprim value ocaml_sd_notify_ready(value ignore)
 {
 	CAMLparam1(ignore);
 	CAMLlocal1(ret);
 
 	ret = Val_int(0);
 
 	sd_notify(1, "READY=1");
 
 	CAMLreturn(ret);
 }
 
 #else
 
-CAMLprim value ocaml_sd_listen_fds(value connect_to)
-{
-	CAMLparam1(connect_to);
-	CAMLlocal1(sock_ret);
-
-	sock_ret = Val_int(-1);
-
-	CAMLreturn(sock_ret);
-}
-
-CAMLprim value ocaml_sd_booted(value ignore)
-{
-	CAMLparam1(ignore);
-	CAMLlocal1(ret);
-
-	ret = Val_false;
-
-	CAMLreturn(ret);
-}
-
 CAMLprim value ocaml_sd_notify_ready(value ignore)
 {
 	CAMLparam1(ignore);
 	CAMLlocal1(ret);
 
 	ret = Val_int(-1);
 
 	CAMLreturn(ret);
 }
 #endif
--- a/tools/ocaml/xenstored/utils.ml
+++ b/tools/ocaml/xenstored/utils.ml
@@ -64,40 +64,33 @@ let unhexify hs =
 	s
 
 let trim_path path =
 	try
 		let rindex = String.rindex path '/' in
 		String.sub path 0 rindex
 	with
 		Not_found -> ""
 
 let join_by_null ls = String.concat "\000" ls
 
 (* unix utils *)
-let create_regular_unix_socket name =
+let create_unix_socket name =
         Unixext.unlink_safe name;
         Unixext.mkdir_rec (Filename.dirname name) 0o700;
         let sockaddr = Unix.ADDR_UNIX(name) in
         let sock = Unix.socket Unix.PF_UNIX Unix.SOCK_STREAM 0 in
-        Unix.set_close_on_exec sock;
         Unix.bind sock sockaddr;
         Unix.listen sock 1;
         sock
 
-let create_unix_socket name =
-        if Systemd.sd_booted() then
-                Systemd.sd_listen_fds name
-        else
-                create_regular_unix_socket name
-
 let read_file_single_integer filename =
 	let fd = Unix.openfile filename [ Unix.O_RDONLY ] 0o640 in
 	let buf = String.make 20 (char_of_int 0) in
 	let sz = Unix.read fd buf 0 20 in
 	Unix.close fd;
 	int_of_string (String.sub buf 0 sz)
 
 let path_complete path connection_path =
 	if String.get path 0 <> '/' then
 		connection_path ^ path
 	else
 		path
--- a/tools/xenstore/xenstored_core.c
+++ b/tools/xenstore/xenstored_core.c
@@ -1726,93 +1726,24 @@ static void init_sockets(int **psock, int **pro_sock)
 {
 	static int minus_one = -1;
 	*psock = *pro_sock = &minus_one;
 }
 #else
 static int destroy_fd(void *_fd)
 {
 	int *fd = _fd;
 	close(*fd);
 	return 0;
 }
 
-#if defined(XEN_SYSTEMD_ENABLED)
-/* Will work regardless of the order systemd gives them to us */
-static int xs_get_sd_fd(const char *connect_to)
-{
-	int fd = SD_LISTEN_FDS_START;
-	int r;
-
-	while (fd <= SD_LISTEN_FDS_START + 1) {
-		r = sd_is_socket_unix(fd, SOCK_STREAM, 1, connect_to, 0);
-		if (r > 0)
-			return fd;
-		fd++;
-	}
-
-	return -EBADR;
-}
-
-static int xs_validate_active_socket(const char *connect_to)
-{
-	if ((strcmp("/var/run/xenstored/socket_ro", connect_to) != 0) &&
-	    (strcmp("/var/run/xenstored/socket", connect_to) != 0)) {
-		sd_notifyf(0, "STATUS=unexpected socket: %s\n"
-			   "ERRNO=%i",
-			   connect_to,
-			   EBADR);
-		return -EBADR;
-	}
-
-	return xs_get_sd_fd(connect_to);
-}
-
-static void xen_claim_active_sockets(int **psock, int **pro_sock)
-{
-	int *sock, *ro_sock;
-	const char *soc_str = xs_daemon_socket();
-	const char *soc_str_ro = xs_daemon_socket_ro();
-	int n;
-
-	n = sd_listen_fds(0);
-	if (n <= 0) {
-		sd_notifyf(0, "STATUS=Failed to get any active sockets: %s\n"
-			   "ERRNO=%i",
-			   strerror(errno),
-			   errno);
-		barf_perror("sd_listen_fds() failed\n");
-	} else if (n != 2) {
-		fprintf(stderr, SD_ERR "Expected 2 fds but given %d\n", n);
-		sd_notifyf(0, "STATUS=Mismatch on number (2): %s\n"
-			   "ERRNO=%d",
-			   strerror(EBADR),
-			   EBADR);
-		barf_perror("sd_listen_fds() gave too many fds\n");
-	}
-
-	*psock = sock = talloc(talloc_autofree_context(), int);
-	*sock = xs_validate_active_socket(soc_str);
-	if (*sock <= 0)
-		barf_perror("%s", soc_str);
-
-	*pro_sock = ro_sock = talloc(talloc_autofree_context(), int);
-	*ro_sock = xs_validate_active_socket(soc_str_ro);
-	if (*ro_sock <= 0)
-		barf_perror("%s", soc_str_ro);
-
-	talloc_set_destructor(sock, destroy_fd);
-	talloc_set_destructor(ro_sock, destroy_fd);
-}
-#endif
-
 static void init_sockets(int **psock, int **pro_sock)
 {
 	struct sockaddr_un addr;
 	int *sock, *ro_sock;
 	const char *soc_str = xs_daemon_socket();
 	const char *soc_str_ro = xs_daemon_socket_ro();
 
 	/* Create sockets for them to listen to. */
 	*psock = sock = talloc(talloc_autofree_context(), int);
 	*sock = socket(PF_UNIX, SOCK_STREAM, 0);
 	if (*sock < 0)
 		barf_perror("Could not create socket");
@@ -1965,60 +1896,46 @@ int main(int argc, char *argv[])
 			break;
 		case 'm':
 			dom0_domid = strtol(optarg, NULL, 10);
 			break;
 		case 'p':
 			priv_domid = strtol(optarg, NULL, 10);
 			break;
 		}
 	}
 	if (optind != argc)
 		barf("%s: No arguments desired", argv[0]);
 
-#if defined(XEN_SYSTEMD_ENABLED)
-	if (sd_booted()) {
-		dofork = false;
-		if (pidfile)
-			barf("%s: PID file not needed on systemd", argv[0]);
-		pidfile = NULL;
-	}
-#endif
-
 	reopen_log();
 
 	/* make sure xenstored directories exist */
 	/* Errors ignored here, will be reported when we open files */
 	mkdir(xs_daemon_rundir(), 0755);
 	mkdir(xs_daemon_rootdir(), 0755);
 
 	if (dofork) {
 		openlog("xenstored", 0, LOG_DAEMON);
 		daemonize();
 	}
 	if (pidfile)
 		write_pidfile(pidfile);
 
 	/* Talloc leak reports go to stderr, which is closed if we fork. */
 	if (!dofork)
 		talloc_enable_leak_report_full();
 
 	/* Don't kill us with SIGPIPE. */
 	signal(SIGPIPE, SIG_IGN);
 
-#if defined(XEN_SYSTEMD_ENABLED)
-	if (sd_booted())
-		xen_claim_active_sockets(&sock, &ro_sock);
-	else
-#endif
-		init_sockets(&sock, &ro_sock);
+	init_sockets(&sock, &ro_sock);
 
 	init_pipe(reopen_log_pipe);
 
 	/* Setup the database */
 	setup_structure();
 
 	/* Listen to hypervisor. */
 	if (!no_domain_init)
 		domain_init();
 
 	/* Restore existing connections. */
 	restore_existing_connections();
@@ -2033,28 +1950,26 @@ int main(int argc, char *argv[])
 		finish_daemonize();
 
 	signal(SIGHUP, trigger_reopen_log);
 
 	/* Get ready to listen to the tools. */
 	initialize_fds(*sock, &sock_pollfd_idx, *ro_sock, &ro_sock_pollfd_idx,
 		       &timeout);
 
 	/* Tell the kernel we're up and running. */
 	xenbus_notify_running();
 
 #if defined(XEN_SYSTEMD_ENABLED)
-	if (sd_booted()) {
-		sd_notify(1, "READY=1");
-		fprintf(stderr, SD_NOTICE "xenstored is ready\n");
-	}
+	sd_notify(1, "READY=1");
+	fprintf(stderr, SD_NOTICE "xenstored is ready\n");
 #endif
 
 	/* Main loop. */
 	for (;;) {
 		struct connection *conn, *next;
 
 		if (poll(fds, nr_fds, timeout) < 0) {
 			if (errno == EINTR)
 				continue;
 			barf_perror("Poll failed");
 		}

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File xen.976ce01e103fc03bb3336cdbc6c951a709e285fe.patch of Package xen (Revision 3b077056294bcb49994ea3227248b4ad)

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