fix multipath qemu-pr-helper

Update patch 1014 for new libmultipath/libmpathpersist API
Force build to fail if multipath is not available

1014-scsi-add-multipath-support-to-qemu-pr-helper.patch

@@ -65,7 +65,7 @@ index becc21a0fe..f6edc2a33f 100755
    xen             xen backend driver support
    xen-pci-passthrough
    brlapi          BrlAPI (Braile)
-@@ -3300,6 +3306,30 @@ else
+@@ -3300,6 +3306,38 @@ else
  fi
  
  ##########################################
@@ -77,9 +77,17 @@ index becc21a0fe..f6edc2a33f 100755
 +#include <mpath_persist.h>
 +unsigned mpath_mx_alloc_len = 1024;
 +int logsink;
++static struct config *multipath_conf;
++extern struct udev *udev;
++extern struct config *get_multipath_config(void);
++extern void put_multipath_config(struct config *conf);
++struct udev *udev;
++struct config *get_multipath_config(void) { return multipath_conf; }
++void put_multipath_config(struct config *conf) { }
++
 +int main(void) {
-+    struct udev *udev = udev_new();
-+    mpath_lib_init(udev);
++    udev = udev_new();
++    multipath_conf = mpath_lib_init();
 +    return 0;
 +}
 +EOF
@@ -225,7 +233,7 @@ index e39efbd529..5f77c873e1 100644
  static int verbose;
  
  #ifdef CONFIG_LIBCAP
-@@ -204,9 +211,316 @@ static int do_sgio(int fd, const uint8_t *cdb, uint8_t *sense,
+@@ -204,9 +211,327 @@ static int do_sgio(int fd, const uint8_t *cdb, uint8_t *sense,
      return r;
  }
  
@@ -294,15 +302,26 @@ index e39efbd529..5f77c873e1 100644
 +
 +/* Variables required by libmultipath and libmpathpersist.  */
 +QEMU_BUILD_BUG_ON(PR_HELPER_DATA_SIZE > MPATH_MAX_PARAM_LEN);
++static struct config *multipath_conf;
 +unsigned mpath_mx_alloc_len = PR_HELPER_DATA_SIZE;
 +int logsink;
++struct udev *udev;
++
++extern struct config *get_multipath_config(void);
++struct config *get_multipath_config(void)
++{
++    return multipath_conf;
++}
++
++extern void put_multipath_config(struct config *conf);
++void put_multipath_config(struct config *conf)
++{
++}
 +
 +static void multipath_pr_init(void)
 +{
-+    static struct udev *udev;
-+
 +    udev = udev_new();
-+    mpath_lib_init(udev);
++    multipath_conf = mpath_lib_init();
 +}
 +
 +static int is_mpath(int fd)

qemu-pr-helper.socket

@@ -3,6 +3,7 @@ Description=Persistent Reservation Daemon for QEMU
 
 [Socket]
 ListenStream=/run/qemu-pr-helper.sock
+SocketMode=0600
 
 [Install]
 WantedBy=multi-user.target

qemu.spec

@@ -107,7 +107,7 @@ Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
 Summary: QEMU is a FAST! processor emulator
 Name: qemu
 Version: 2.10.0
-Release: 4%{?rcrel}%{?dist}
+Release: 5%{?rcrel}%{?dist}
 Epoch: 2
 License: GPLv2+ and LGPLv2+ and BSD
 Group: Development/Tools
@@ -1133,6 +1133,7 @@ run_configure \
     --enable-modules \
     --audio-drv-list=pa,sdl,alsa,oss \
     --tls-priority=@QEMU,SYSTEM \
+    --enable-mpath \
     %{spiceflag} \
     --with-sdlabi="2.0" \
     --with-gtkabi="3.0"
@@ -1173,6 +1174,7 @@ run_configure \
     --disable-nettle \
     --disable-cap-ng \
     --disable-brlapi \
+    --disable-mpath \
     --disable-libnfs
 
 make V=1 %{?_smp_mflags} $buildldflags
@@ -2016,6 +2018,11 @@ getent passwd qemu >/dev/null || \
 
 
 %changelog
+* Tue Oct 17 2017 Paolo Bonzini <pbonzini@redhat.com> - 2:2.10.0-5
+- Update patch 1014 for new libmultipath/libmpathpersist API
+- Force build to fail if multipath is not available
+- Tighten permissions on the qemu-pr-helper socket
+
 * Thu Sep 28 2017 Paolo Bonzini <pbonzini@redhat.com> - 2:2.10.0-4
 - Stop using tcmalloc, glibc got faster