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authorBenoƮt Canet <benoit@irqsave.net>2014-02-21 22:21:15 +0100
committerKevin Wolf <kwolf@redhat.com>2014-02-21 22:29:50 +0100
commit95c6bff3561eedaf7c7de287bc4a002720605a8d (patch)
treed440257f7624db52df1242afb7f2aff718ebe01c /configure
parent7db6982a19f61e3668397b5e31ebfb16a477c414 (diff)
quorum: Add quorum mechanism.
This patchset enables the core of the quorum mechanism. The num_children reads are compared to get the majority version and if this version exists more than threshold times the guest won't see the error at all. If a block is corrupted or if an error occurs during an IO or if the quorum cannot be established QMP events are used to report to the management. Use gnutls's SHA-256 to compare versions. --enable-quorum must be used to enable the feature. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure36
1 files changed, 36 insertions, 0 deletions
diff --git a/configure b/configure
index 39f2a1acd2..6143acbcbf 100755
--- a/configure
+++ b/configure
@@ -264,6 +264,7 @@ gtkabi="2.0"
tpm="no"
libssh2=""
vhdx=""
+quorum="no"
# parse CC options first
for opt do
@@ -1005,6 +1006,10 @@ for opt do
;;
--disable-vhdx) vhdx="no"
;;
+ --disable-quorum) quorum="no"
+ ;;
+ --enable-quorum) quorum="yes"
+ ;;
*) echo "ERROR: unknown option $opt"; show_help="yes"
;;
esac
@@ -1261,6 +1266,8 @@ Advanced options (experts only):
--enable-libssh2 enable ssh block device support
--disable-vhdx disables support for the Microsoft VHDX image format
--enable-vhdx enable support for the Microsoft VHDX image format
+ --disable-quorum disable quorum block filter support
+ --enable-quorum enable quorum block filter support
NOTE: The object files are built at the place where configure is launched
EOF
@@ -1937,6 +1944,30 @@ EOF
fi
##########################################
+# Quorum probe (check for gnutls)
+if test "$quorum" != "no" ; then
+cat > $TMPC <<EOF
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+int main(void) {char data[4096], digest[32];
+gnutls_hash_fast(GNUTLS_DIG_SHA256, data, 4096, digest);
+return 0;
+}
+EOF
+quorum_tls_cflags=`$pkg_config --cflags gnutls 2> /dev/null`
+quorum_tls_libs=`$pkg_config --libs gnutls 2> /dev/null`
+if compile_prog "$quorum_tls_cflags" "$quorum_tls_libs" ; then
+ qcow_tls=yes
+ libs_softmmu="$quorum_tls_libs $libs_softmmu"
+ libs_tools="$quorum_tls_libs $libs_softmmu"
+ QEMU_CFLAGS="$QEMU_CFLAGS $quorum_tls_cflags"
+else
+ echo "gnutls > 2.10.0 required to compile Quorum"
+ exit 1
+fi
+fi
+
+##########################################
# VNC SASL detection
if test "$vnc" = "yes" -a "$vnc_sasl" != "no" ; then
cat > $TMPC <<EOF
@@ -3893,6 +3924,7 @@ echo "libssh2 support $libssh2"
echo "TPM passthrough $tpm_passthrough"
echo "QOM debugging $qom_cast_debug"
echo "vhdx $vhdx"
+echo "Quorum $quorum"
if test "$sdl_too_old" = "yes"; then
echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -4295,6 +4327,10 @@ if test "$libssh2" = "yes" ; then
echo "CONFIG_LIBSSH2=y" >> $config_host_mak
fi
+if test "$quorum" = "yes" ; then
+ echo "CONFIG_QUORUM=y" >> $config_host_mak
+fi
+
if test "$virtio_blk_data_plane" = "yes" ; then
echo 'CONFIG_VIRTIO_BLK_DATA_PLANE=$(CONFIG_VIRTIO)' >> $config_host_mak
fi