Qemu FreeBSD: fix compilation

* Autotools changes:
  - Don't assume Qemu is Linux-only
  - Check Linux headers only on Linux
  - Disable firewalld on FreeBSD
* Initctl:
  Initctl seem to present only on Linux, so stub it on other platforms
* Raw I/O: Linux-only as well
* Headers cleanup

configure.ac

@@ -360,10 +360,11 @@ dnl are also linux specific.  The "network" and storage_fs drivers are known
 dnl to not work on MacOS X presently, so we also make a note if compiling
 dnl for that
 
-with_linux=no with_osx=no
+with_linux=no with_osx=no with_freebsd=no
 case $host in
   *-*-linux*) with_linux=yes ;;
   *-*-darwin*) with_osx=yes ;;
+  *-*-freebsd*) with_freebsd=yes ;;
 esac
 
 if test $with_linux = no; then
@@ -371,14 +372,19 @@ if test $with_linux = no; then
     then
         with_lxc=no
     fi
-    if test "x$with_qemu" != xyes
-    then
-        with_qemu=no
-    fi
     with_dtrace=no
 fi
 
+if test $with_freebsd = yes; then
+   with_firewalld=no
+fi
+
+if test $with_osx = yes; then
+   with_qemu=no
+fi
+
 AM_CONDITIONAL([WITH_LINUX], [test "$with_linux" = "yes"])
+AM_CONDITIONAL([WITH_FREEBSD], [test "$with_freebsd" = "yes"])
 
 dnl Allow to build without Xen, QEMU/KVM, test or remote driver
 AC_ARG_WITH([xen],
@@ -949,9 +955,11 @@ fi
 dnl
 dnl check for kernel headers required by src/bridge.c
 dnl
-if test "$with_qemu" = "yes" || test "$with_lxc" = "yes" ; then
-  AC_CHECK_HEADERS([linux/param.h linux/sockios.h linux/if_bridge.h linux/if_tun.h],,
-                   AC_MSG_ERROR([You must install kernel-headers in order to compile libvirt with QEMU or LXC support]))
+if test "$with_linux" = "yes"; then
+  if test "$with_qemu" = "yes" || test "$with_lxc" = "yes" ; then
+    AC_CHECK_HEADERS([linux/param.h linux/sockios.h linux/if_bridge.h linux/if_tun.h],,
+                     AC_MSG_ERROR([You must install kernel-headers in order to compile libvirt with QEMU or LXC support]))
+  fi
 fi
 
 
@@ -2880,14 +2888,24 @@ if test "x$with_libblkid" = "xyes"; then
 fi
 AM_CONDITIONAL([HAVE_LIBBLKID], [test "x$with_libblkid" = "xyes"])
 
+if test $with_freebsd = yes; then
+  default_qemu_user=root
+  default_qemu_group=wheel
+else
+  default_qemu_user=root
+  default_qemu_group=root
+fi
+
 AC_ARG_WITH([qemu-user],
-  AC_HELP_STRING([--with-qemu-user], [username to run QEMU system instance as @<:@default=root@:>@]),
+  AC_HELP_STRING([--with-qemu-user],
+  [username to run QEMU system instance as @<:@default=platform dependent@:>@]),
   [QEMU_USER=${withval}],
-  [QEMU_USER=root])
+  [QEMU_USER=${default_qemu_user}])
 AC_ARG_WITH([qemu-group],
-  AC_HELP_STRING([--with-qemu-group], [groupname to run QEMU system instance as @<:@default=root@:>@]),
+  AC_HELP_STRING([--with-qemu-group],
+  [groupname to run QEMU system instance as @<:@default=platform dependent@:>@]),
   [QEMU_GROUP=${withval}],
-  [QEMU_GROUP=root])
+  [QEMU_GROUP=${default_qemu_group}])
 AC_DEFINE_UNQUOTED([QEMU_USER], ["$QEMU_USER"], [QEMU user account])
 AC_DEFINE_UNQUOTED([QEMU_GROUP], ["$QEMU_GROUP"], [QEMU group account])
 

src/qemu/qemu_process.c

@@ -27,7 +27,12 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/resource.h>
-#include <linux/capability.h>
+#if defined(__linux__)
+# include <linux/capability.h>
+#elif defined(__FreeBSD__)
+# include <sys/param.h>
+# include <sys/cpuset.h>
+#endif
 
 #include "qemu_process.h"
 #include "qemu_domain.h"
@@ -3716,7 +3721,12 @@ int qemuProcessStart(virConnectPtr conn,
     /* in case a certain disk is desirous of CAP_SYS_RAWIO, add this */
     for (i = 0; i < vm->def->ndisks; i++) {
         if (vm->def->disks[i]->rawio == 1)
+#ifdef CAP_SYS_RAWIO
             virCommandAllowCap(cmd, CAP_SYS_RAWIO);
+#else
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Raw I/O is not supported on this platform"));
+#endif
     }
 
     virCommandSetPreExecHook(cmd, qemuProcessHook, &hookData);

src/util/virinitctl.c

@@ -35,6 +35,8 @@
 
 #define VIR_FROM_THIS VIR_FROM_INITCTL
 
+#if defined(__linux__) || \
+    (defined(__FreeBSD_kernel__) && !(defined(__FreeBSD__)))
 /* These constants & struct definitions are taken from
  * systemd, under terms of LGPLv2+
  *
@@ -43,29 +45,29 @@
  *              Copyright (C) 1995-2004 Miquel van Smoorenburg
  */
 
-#if defined(__FreeBSD_kernel__)
-# define VIR_INITCTL_FIFO  "/etc/.initctl"
-#else
-# define VIR_INITCTL_FIFO  "/dev/initctl"
-#endif
+# if defined(__FreeBSD_kernel__)
+#  define VIR_INITCTL_FIFO  "/etc/.initctl"
+# else
+#  define VIR_INITCTL_FIFO  "/dev/initctl"
+# endif
 
-#define VIR_INITCTL_MAGIC 0x03091969
-#define VIR_INITCTL_CMD_START          0
-#define VIR_INITCTL_CMD_RUNLVL         1
-#define VIR_INITCTL_CMD_POWERFAIL      2
-#define VIR_INITCTL_CMD_POWERFAILNOW   3
-#define VIR_INITCTL_CMD_POWEROK        4
-#define VIR_INITCTL_CMD_BSD            5
-#define VIR_INITCTL_CMD_SETENV         6
-#define VIR_INITCTL_CMD_UNSETENV       7
+# define VIR_INITCTL_MAGIC 0x03091969
+# define VIR_INITCTL_CMD_START          0
+# define VIR_INITCTL_CMD_RUNLVL         1
+# define VIR_INITCTL_CMD_POWERFAIL      2
+# define VIR_INITCTL_CMD_POWERFAILNOW   3
+# define VIR_INITCTL_CMD_POWEROK        4
+# define VIR_INITCTL_CMD_BSD            5
+# define VIR_INITCTL_CMD_SETENV         6
+# define VIR_INITCTL_CMD_UNSETENV       7
 
-#define VIR_INITCTL_CMD_CHANGECONS     12345
+# define VIR_INITCTL_CMD_CHANGECONS     12345
 
-#ifdef MAXHOSTNAMELEN
-# define VIR_INITCTL_RQ_HLEN   MAXHOSTNAMELEN
-#else
-# define VIR_INITCTL_RQ_HLEN   64
-#endif
+# ifdef MAXHOSTNAMELEN
+#  define VIR_INITCTL_RQ_HLEN   MAXHOSTNAMELEN
+# else
+#  define VIR_INITCTL_RQ_HLEN   64
+# endif
 
 /*
 *      This is what BSD 4.4 uses when talking to init.
@@ -161,3 +163,11 @@ cleanup:
     VIR_FORCE_CLOSE(fd);
     return ret;
 }
+#else
+int virInitctlSetRunLevel(virInitctlRunLevel level ATTRIBUTE_UNUSED,
+                          const char *vroot ATTRIBUTE_UNUSED)
+{
+   virReportError(VIR_ERR_NO_SUPPORT, "%s", __FUNCTION__);
+   return -1;
+}
+#endif