Merge remote-tracking branch 'kwolf/for-anthony' into staging

# By Stefan Hajnoczi (2) and others
# Via Kevin Wolf
* kwolf/for-anthony:
  virtio-blk: Do not segfault fault if failed to initialize dataplane
  qemu-iotests: add 052 BDRV_O_SNAPSHOT test
  block: fix BDRV_O_SNAPSHOT protocol detection
  qcow2: Fix segfault in qcow2_invalidate_cache
  sheepdog: show error message for halt status

block.c

@@ -830,7 +830,6 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
     if (flags & BDRV_O_SNAPSHOT) {
         BlockDriverState *bs1;
         int64_t total_size;
-        int is_protocol = 0;
         BlockDriver *bdrv_qcow2;
         QEMUOptionParameter *options;
         char backing_filename[PATH_MAX];
@@ -847,9 +846,6 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
         }
         total_size = bdrv_getlength(bs1) & BDRV_SECTOR_MASK;
 
-        if (bs1->drv && bs1->drv->protocol_name)
-            is_protocol = 1;
-
         bdrv_delete(bs1);
 
         ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));
@@ -858,7 +854,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
         }
 
         /* Real path is meaningless for protocols */
-        if (is_protocol) {
+        if (path_has_protocol(filename)) {
             snprintf(backing_filename, sizeof(backing_filename),
                      "%s", filename);
         } else if (!realpath(filename, backing_filename)) {

block/qcow2.c

@@ -29,6 +29,7 @@
 #include "block/qcow2.h"
 #include "qemu/error-report.h"
 #include "qapi/qmp/qerror.h"
+#include "qapi/qmp/qbool.h"
 #include "trace.h"
 
 /*
@@ -520,7 +521,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags)
         goto fail;
     }
 
-    s->use_lazy_refcounts = qemu_opt_get_bool(opts, "lazy_refcounts",
+    s->use_lazy_refcounts = qemu_opt_get_bool(opts, QCOW2_OPT_LAZY_REFCOUNTS,
         (s->compatible_features & QCOW2_COMPAT_LAZY_REFCOUNTS));
 
     qemu_opts_del(opts);
@@ -930,6 +931,7 @@ static void qcow2_invalidate_cache(BlockDriverState *bs)
     AES_KEY aes_encrypt_key;
     AES_KEY aes_decrypt_key;
     uint32_t crypt_method = 0;
+    QDict *options;
 
     /*
      * Backing files are read-only which makes all of their metadata immutable,
@@ -944,8 +946,14 @@ static void qcow2_invalidate_cache(BlockDriverState *bs)
 
     qcow2_close(bs);
 
+    options = qdict_new();
+    qdict_put(options, QCOW2_OPT_LAZY_REFCOUNTS,
+              qbool_from_int(s->use_lazy_refcounts));
+
     memset(s, 0, sizeof(BDRVQcowState));
-    qcow2_open(bs, NULL, flags);
+    qcow2_open(bs, options, flags);
+
+    QDECREF(options);
 
     if (crypt_method) {
         s->crypt_method = crypt_method;

block/qcow2.h

@@ -58,6 +58,9 @@
 
 #define DEFAULT_CLUSTER_SIZE 65536
 
+
+#define QCOW2_OPT_LAZY_REFCOUNTS "lazy_refcounts"
+
 typedef struct QCowHeader {
     uint32_t magic;
     uint32_t version;

block/sheepdog.c

@@ -65,6 +65,7 @@
 #define SD_RES_WAIT_FOR_FORMAT  0x16 /* Waiting for a format operation */
 #define SD_RES_WAIT_FOR_JOIN    0x17 /* Waiting for other nodes joining */
 #define SD_RES_JOIN_FAILED   0x18 /* Target node had failed to join sheepdog */
+#define SD_RES_HALT          0x19 /* Sheepdog is stopped serving IO request */
 
 /*
  * Object ID rules
@@ -344,6 +345,7 @@ static const char * sd_strerror(int err)
         {SD_RES_WAIT_FOR_FORMAT, "Sheepdog is waiting for a format operation"},
         {SD_RES_WAIT_FOR_JOIN, "Sheepdog is waiting for other nodes joining"},
         {SD_RES_JOIN_FAILED, "Target node had failed to join sheepdog"},
+        {SD_RES_HALT, "Sheepdog is stopped serving IO request"},
     };
 
     for (i = 0; i < ARRAY_SIZE(errors); ++i) {

hw/virtio-blk.c

@@ -663,7 +663,7 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
     s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
     if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) {
-        virtio_cleanup(vdev);
+        virtio_common_cleanup(vdev);
         return -1;
     }
 #endif

tests/qemu-iotests/052

+#!/bin/bash
+#
+# Test bdrv_read/bdrv_write using BDRV_O_SNAPSHOT
+#
+# Copyright (C) 2013 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=stefanha@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+
+_cleanup()
+{
+	_cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fmt generic
+_supported_proto generic
+_supported_os Linux
+
+
+size=128M
+_make_test_img $size
+
+echo
+echo "== reading whole image =="
+$QEMU_IO -s -c "read 0 $size" $TEST_IMG | _filter_qemu_io
+
+echo
+echo "== writing whole image does not modify image =="
+$QEMU_IO -s -c "write -P 0xa 0 $size" $TEST_IMG | _filter_qemu_io
+$QEMU_IO -c "read -P 0 0 $size" $TEST_IMG | _filter_qemu_io
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0

tests/qemu-iotests/052.out

+QA output created by 052
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 
+
+== reading whole image ==
+read 134217728/134217728 bytes at offset 0
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== writing whole image does not modify image ==
+wrote 134217728/134217728 bytes at offset 0
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 134217728/134217728 bytes at offset 0
+128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+*** done

tests/qemu-iotests/group

@@ -57,3 +57,4 @@
 048 img auto quick
 049 rw auto
 050 rw auto backing quick
+052 rw auto backing