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From e0a37e07c5ea6557706cc0840802519b8b3fc563 Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Thu, 12 Apr 2012 13:30:28 +0200
Subject: [PATCH] rpcbind: add support for systemd socket activation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Making rpcbind sockect activated will greatly simplify
its integration in systemd systems. In essence, other services
may now assume that rpcbind is always available, even during very
early boot. This means that we no longer need to worry about any
ordering dependencies.
This is based on a patch originally posted by Lennart Poettering:
<http://permalink.gmane.org/gmane.linux.nfs/33774>.
That patch was not merged due to the lack of a shared library and
as systemd was seen to be too Fedora specific.
Systemd now provides a shared library, and it is shipped by defalt in
OpenSUSE in addition to Fedora, and it is available in Debain, Gentoo,
Arch, and others.
This version of the patch has three changes from the original:
* It uses the shared library.
* It comes with unit files.
* It is rebased on top of master.
A followup patch will sort out the indentation issues, as they are left in
to make review simpler.
Comments welcome.
v2: correctly enable systemd code at compile time
handle the case where not all the required sockets were supplied
listen on udp/tcp port 111 in addition to /var/run/rpcbind.sock
do not daemonize
v3: default to compile without systemd support when systemd is not
installed at compile time.
Original-patch-by: Lennart Poettering <lennart@poettering.net>
Cc: systemd-devel@lists.freedesktop.org
Cc: Steve Dickson <steved@redhat.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Cristian Rodríguez <crrodriguez@opensuse.org>
Signed-off-by: Tom Gundersen <teg@jklm.no>
---
Makefile.am | 15 ++++++++
configure.in | 11 ++++++
src/rpcbind.c | 81 ++++++++++++++++++++++++++++++++++++++++----
systemd/.gitignore | 1 +
systemd/rpcbind.service.in | 9 +++++
systemd/rpcbind.socket | 12 +++++++
6 files changed, 123 insertions(+), 6 deletions(-)
create mode 100644 systemd/.gitignore
create mode 100644 systemd/rpcbind.service.in
create mode 100644 systemd/rpcbind.socket
diff --git a/Makefile.am b/Makefile.am
index 9fa608e..194b467 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -38,6 +38,21 @@ rpcbind_SOURCES = \
src/warmstart.c
rpcbind_LDADD = $(TIRPC_LIBS)
+if SYSTEMD
+AM_CPPFLAGS += $(SYSTEMD_CFLAGS) -DSYSTEMD
+
+rpcbind_LDADD += $(SYSTEMD_LIBS)
+
+systemd/rpcbind.service: systemd/rpcbind.service.in Makefile
+ sed -e 's,@bindir\@,$(bindir),g' \
+ < $< > $@ || rm $@
+
+systemdsystemunit_DATA = \
+ systemd/rpcbind.service \
+ systemd/rpcbind.socket
+
+endif
+
rpcinfo_SOURCES = src/rpcinfo.c
rpcinfo_LDADD = $(TIRPC_LIBS)
diff --git a/configure.in b/configure.in
index 2b67720..e96cab2 100644
--- a/configure.in
+++ b/configure.in
@@ -29,6 +29,17 @@ AC_SUBST([rpcuser], [$with_rpcuser])
PKG_CHECK_MODULES([TIRPC], [libtirpc])
+PKG_PROG_PKG_CONFIG
+AC_ARG_WITH([systemdsystemunitdir],
+ AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [Directory for systemd service files]),
+ [], [with_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)])
+ if test -n "$with_systemdsystemunitdir" -a "x$with_systemdsystemunitdir" != xno; then
+ AC_SUBST([systemdsystemunitdir], [$with_systemdsystemunitdir])
+ PKG_CHECK_MODULES([SYSTEMD], [libsystemd-daemon])
+ fi
+AM_CONDITIONAL(SYSTEMD, [test -n "$with_systemdsystemunitdir" -a "x$with_systemdsystemunitdir" != xno ])
+
+
AS_IF([test x$enable_libwrap = xyes], [
AC_CHECK_LIB([wrap], [hosts_access], ,
AC_MSG_ERROR([libwrap support requested but unable to find libwrap]))
diff --git a/src/rpcbind.c b/src/rpcbind.c
index 9a0504d..eba32ac 100644
--- a/src/rpcbind.c
+++ b/src/rpcbind.c
@@ -56,6 +56,9 @@
#include <netinet/in.h>
#endif
#include <arpa/inet.h>
+#ifdef SYSTEMD
+#include <systemd/sd-daemon.h>
+#endif
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
@@ -285,6 +288,7 @@ init_transport(struct netconfig *nconf)
u_int32_t host_addr[4]; /* IPv4 or IPv6 */
struct sockaddr_un sun;
mode_t oldmask;
+ int n = 0;
res = NULL;
if ((nconf->nc_semantics != NC_TPI_CLTS) &&
@@ -304,6 +308,76 @@ init_transport(struct netconfig *nconf)
}
#endif
+ if (!__rpc_nconf2sockinfo(nconf, &si)) {
+ syslog(LOG_ERR, "cannot get information for %s",
+ nconf->nc_netid);
+ return (1);
+ }
+
+#ifdef SYSTEMD
+ n = sd_listen_fds(0);
+ if (n < 0) {
+ syslog(LOG_ERR, "failed to acquire systemd scokets: %s", strerror(-n));
+ return 1;
+ }
+
+ /* Try to find if one of the systemd sockets we were given match
+ * our netconfig structure. */
+
+ for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
+ struct __rpc_sockinfo si_other;
+ union {
+ struct sockaddr sa;
+ struct sockaddr_un un;
+ struct sockaddr_in in4;
+ struct sockaddr_in6 in6;
+ struct sockaddr_storage storage;
+ } sa;
+ socklen_t addrlen = sizeof(sa);
+
+ if (!__rpc_fd2sockinfo(fd, &si_other)) {
+ syslog(LOG_ERR, "cannot get information for fd %i", fd);
+ return 1;
+ }
+
+ if (si.si_af != si_other.si_af ||
+ si.si_socktype != si_other.si_socktype ||
+ si.si_proto != si_other.si_proto)
+ continue;
+
+ if (getsockname(fd, &sa.sa, &addrlen) < 0) {
+ syslog(LOG_ERR, "failed to query socket name: %s",
+ strerror(errno));
+ goto error;
+ }
+
+ /* Copy the address */
+ taddr.addr.maxlen = taddr.addr.len = addrlen;
+ taddr.addr.buf = malloc(addrlen);
+ if (taddr.addr.buf == NULL) {
+ syslog(LOG_ERR,
+ "cannot allocate memory for %s address",
+ nconf->nc_netid);
+ goto error;
+ }
+ memcpy(taddr.addr.buf, &sa, addrlen);
+
+ my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
+ RPC_MAXDATASIZE, RPC_MAXDATASIZE);
+ if (my_xprt == (SVCXPRT *)NULL) {
+ syslog(LOG_ERR, "%s: could not create service",
+ nconf->nc_netid);
+ goto error;
+ }
+ }
+
+ /* if none of the systemd sockets matched, we set up the socket in
+ * the normal way:
+ */
+#endif
+
+ if(my_xprt == (SVCXPRT *)NULL) {
+
/*
* XXX - using RPC library internal functions. For NC_TPI_CLTS
* we call this later, for each socket we like to bind.
@@ -316,12 +390,6 @@ init_transport(struct netconfig *nconf)
}
}
- if (!__rpc_nconf2sockinfo(nconf, &si)) {
- syslog(LOG_ERR, "cannot get information for %s",
- nconf->nc_netid);
- return (1);
- }
-
if ((strcmp(nconf->nc_netid, "local") == 0) ||
(strcmp(nconf->nc_netid, "unix") == 0)) {
memset(&sun, 0, sizeof sun);
@@ -558,6 +626,7 @@ init_transport(struct netconfig *nconf)
goto error;
}
}
+ }
#ifdef PORTMAP
/*
diff --git a/systemd/.gitignore b/systemd/.gitignore
new file mode 100644
index 0000000..b7b4561
--- /dev/null
+++ b/systemd/.gitignore
@@ -0,0 +1 @@
+rpcbind.service
diff --git a/systemd/rpcbind.service.in b/systemd/rpcbind.service.in
new file mode 100644
index 0000000..58ae5de
--- /dev/null
+++ b/systemd/rpcbind.service.in
@@ -0,0 +1,9 @@
+[Unit]
+Description=RPC Bind
+
+[Service]
+ExecStart=@bindir@/rpcbind -w -f
+
+[Install]
+WantedBy=multi-user.target
+Also=rpcbind.socket
diff --git a/systemd/rpcbind.socket b/systemd/rpcbind.socket
new file mode 100644
index 0000000..ad5fd62
--- /dev/null
+++ b/systemd/rpcbind.socket
@@ -0,0 +1,12 @@
+[Unit]
+Description=RPCbind Server Activation Socket
+Wants=rpcbind.target
+Before=rpcbind.target
+
+[Socket]
+ListenStream=/var/run/rpcbind.sock
+ListenStream=111
+ListenDatagram=111
+
+[Install]
+WantedBy=sockets.target
--
1.7.10
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