block/file-posix: Simplify the XFS_IOC_DIOINFO handling

The handling for the XFS_IOC_DIOINFO ioctl is currently quite excessive:
This is not a "real" feature like the other features that we provide with
the "--enable-xxx" and "--disable-xxx" switches for the configure script,
since this does not influence lots of code (it's only about one call to
xfsctl() in file-posix.c), so people don't gain much with the ability to
disable this with "--disable-xfsctl".
It's also unfortunate that the ioctl will be disabled on Linux in case
the user did not install the right xfsprogs-devel package before running
configure. Thus let's simplify this by providing the ioctl definition
on our own, so we can completely get rid of the header dependency and
thus the related code in the configure script.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211215125824.250091-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 31 deletions

diff --git a/configure b/configure
index 030728d..3a523a3 100755
--- a/configure
+++ b/configure
@@ -291,7 +291,6 @@ EXTRA_CXXFLAGS=""
 EXTRA_LDFLAGS=""
 
 xen_ctrl_version="$default_feature"
-xfs="$default_feature"
 membarrier="$default_feature"
 vhost_kernel="$default_feature"
 vhost_net="$default_feature"
@@ -1021,10 +1020,6 @@ for opt do
   ;;
   --enable-opengl) opengl="yes"
   ;;
-  --disable-xfsctl) xfs="no"
-  ;;
-  --enable-xfsctl) xfs="yes"
-  ;;
   --disable-zlib-test)
   ;;
   --enable-guest-agent) guest_agent="yes"
@@ -1431,7 +1426,6 @@ cat << EOF
   avx512f         AVX512F optimization support
   replication     replication support
   opengl          opengl support
-  xfsctl          xfsctl support
   qom-cast-debug  cast debugging support
   tools           build qemu-io, qemu-nbd and qemu-img tools
   bochs           bochs image format support
@@ -2324,28 +2318,6 @@ EOF
 fi
 
 ##########################################
-# xfsctl() probe, used for file-posix.c
-if test "$xfs" != "no" ; then
-  cat > $TMPC << EOF
-#include <stddef.h>  /* NULL */
-#include <xfs/xfs.h>
-int main(void)
-{
-    xfsctl(NULL, 0, 0, NULL);
-    return 0;
-}
-EOF
-  if compile_prog "" "" ; then
-    xfs="yes"
-  else
-    if test "$xfs" = "yes" ; then
-      feature_not_found "xfs" "Install xfsprogs/xfslibs devel"
-    fi
-    xfs=no
-  fi
-fi
-
-##########################################
 # plugin linker support probe
 
 if test "$plugins" != "no"; then
@@ -3456,9 +3428,6 @@ echo "CONFIG_BDRV_RO_WHITELIST=$block_drv_ro_whitelist" >> $config_host_mak
 if test "$block_drv_whitelist_tools" = "yes" ; then
   echo "CONFIG_BDRV_WHITELIST_TOOLS=y" >> $config_host_mak
 fi
-if test "$xfs" = "yes" ; then
-  echo "CONFIG_XFS=y" >> $config_host_mak
-fi
 qemu_version=$(head $source_path/VERSION)
 echo "PKGVERSION=$pkgversion" >>$config_host_mak
 echo "SRC_PATH=$source_path" >> $config_host_mak