Signed-off-by: Benoit Canet <ben...@irqsave.net>
---
block/qcow2-dedup.c | 15 +++++++++++++++
block/qcow2.c | 5 +++++
configure | 35 +++++++++++++++++++++++++++++++++++
3 files changed, 55 insertions(+)
diff --git a/block/qcow2-dedup.c b/block/qcow2-dedup.c
index 599cb2e..606459f 100644
--- a/block/qcow2-dedup.c
+++ b/block/qcow2-dedup.c
@@ -33,6 +33,10 @@
#include <gnutls/crypto.h>
#endif
+#ifdef CONFIG_SKEIN_DEDUP
+#include <skeinApi.h>
+#endif
+
/*
* Prepare a buffer containing everything required to compute cluster
* sized deduplication hashes.
@@ -153,6 +157,17 @@ static int qcow2_compute_cluster_hash(BlockDriverState *bs,
return gnutls_hash_fast(GNUTLS_DIG_SHA256, data,
s->cluster_size, hash->data);
#endif
+#if defined(CONFIG_SKEIN_DEDUP)
+ case QCOW_HASH_SKEIN:
+ {
+ SkeinCtx_t ctx;
+ skeinCtxPrepare(&ctx, Skein256);
+ skeinInit(&ctx, Skein256);
+ skeinUpdate(&ctx, data, s->cluster_size);
+ skeinFinal(&ctx, hash->data);
+ }
+ return 0;
+#endif
default:
error_report("Invalid deduplication hash algorithm %i",
s->dedup_hash_algo);
diff --git a/block/qcow2.c b/block/qcow2.c
index 11c115f..ea2f0f2 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1592,6 +1592,11 @@ static int8_t qcow2_get_dedup_hash_algo(char *value)
if (!value || !strcmp(value, "sha256")) {
return QCOW_HASH_SHA256;
}
+#if defined(CONFIG_SKEIN_DEDUP)
+ if (!strcmp(value, "skein")) {
+ return QCOW_HASH_SKEIN;
+ }
+#endif
error_printf("Unsupported deduplication hash algorithm.\n");
return -EINVAL;
diff --git a/configure b/configure
index 34b26b2..902c3c1 100755
--- a/configure
+++ b/configure
@@ -241,6 +241,7 @@ gtkabi="2.0"
tpm="no"
libssh2=""
sha256_dedup="yes"
+skein_dedup="no"
# parse CC options first
for opt do
@@ -935,6 +936,10 @@ for opt do
;;
--enable-sha256-dedup) sha256_dedup="yes"
;;
+ --disable-skein-dedup) skein_dedup="no"
+ ;;
+ --enable-skein-dedup) skein_dedup="yes"
+ ;;
*) echo "ERROR: unknown option $opt"; show_help="yes"
;;
esac
@@ -1202,6 +1207,7 @@ echo " --gcov=GCOV use specified gcov
[$gcov_tool]"
echo " --enable-tpm enable TPM support"
echo " --disable-libssh2 disable ssh block device support"
echo " --enable-libssh2 enable ssh block device support"
+echo " --enable-skein-dedup enable computing dedup hashes with SKEIN"
echo ""
echo "NOTE: The object files are built at the place where configure is
launched"
exit 1
@@ -2613,6 +2619,30 @@ EOF
fi
fi
+##########################################
+# SKEIN dedup hash function probe
+if test "$skein_dedup" != "no" ; then
+ cat > $TMPC <<EOF
+#include <skeinApi.h>
+int main(void) {
+ SkeinCtx_t ctx;
+ skeinCtxPrepare(&ctx, 512);
+ return 0;
+}
+EOF
+ skein_libs="-lskein3fish"
+ if compile_prog "" "$skein_libs" ; then
+ skein_dedup=yes
+ libs_tools="$skein_libs $libs_tools"
+ libs_softmmu="$skein_libs $libs_softmmu"
+ else
+ if test "$skein_dedup" = "yes" ; then
+ feature_not_found "libskein3fish not found"
+ fi
+ skein_dedup=no
+ fi
+fi
+
#
# Check for xxxat() functions when we are building linux-user
# emulator. This is done because older glibc versions don't
@@ -3603,6 +3633,7 @@ echo "gcov enabled $gcov"
echo "TPM support $tpm"
echo "libssh2 support $libssh2"
echo "TPM passthrough $tpm_passthrough"
+echo "SKEIN support $skein_dedup"
if test "$sdl_too_old" = "yes"; then
echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -3991,6 +4022,10 @@ if test "$sha256_dedup" = "yes" ; then
echo "CONFIG_SHA256_DEDUP=y" >> $config_host_mak
fi
+if test "$skein_dedup" = "yes" ; then
+ echo "CONFIG_SKEIN_DEDUP=y" >> $config_host_mak
+fi
+
# USB host support
case "$usb" in
linux)
--
1.7.10.4
