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From 4d6f00b6dc1d17761ea5bd3656d0e60e2f6cfa61 Mon Sep 17 00:00:00 2001
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Message-Id: <4d6f00b6dc1d17761ea5bd3656d0e60e2f6cfa61@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Wed, 19 Feb 2020 15:10:22 +0100
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Subject: [PATCH] qemu: block: Properly format storage slice into backing store
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strings
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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When creating overlay images e.g. for snapshots or when merging
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snapshots we often specify the backing store string to use. Make the
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formatter aware of backing chain entries which have a <slice>
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configured so that we record it properly. Otherwise such images
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would not work without the XML (when detecting the backing chain).
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit 73ca20146700c82e257b02ff8296e42a92629c58)
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https://bugzilla.redhat.com/show_bug.cgi?id=1791788
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Message-Id: <68328ece6d627b223d5c7f56c5286fc5d0d04502.1582120424.git.pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/qemu/qemu_block.c | 84 ++++++++++++++++++++++++++-----------------
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1 file changed, 51 insertions(+), 33 deletions(-)
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diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
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index 1147f4d3af..387a2db2e6 100644
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--- a/src/qemu/qemu_block.c
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+++ b/src/qemu/qemu_block.c
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@@ -1930,44 +1930,48 @@ qemuBlockGetBackingStoreString(virStorageSourcePtr src)
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{
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int actualType = virStorageSourceGetActualType(src);
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g_autoptr(virJSONValue) backingProps = NULL;
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+ g_autoptr(virJSONValue) sliceProps = NULL;
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+ virJSONValuePtr props = NULL;
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g_autoptr(virURI) uri = NULL;
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g_autofree char *backingJSON = NULL;
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char *ret = NULL;
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- if (virStorageSourceIsLocalStorage(src)) {
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- ret = g_strdup(src->path);
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- return ret;
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- }
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-
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- /* generate simplified URIs for the easy cases */
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- if (actualType == VIR_STORAGE_TYPE_NETWORK &&
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- src->nhosts == 1 &&
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- src->hosts->transport == VIR_STORAGE_NET_HOST_TRANS_TCP) {
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-
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- switch ((virStorageNetProtocol) src->protocol) {
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- case VIR_STORAGE_NET_PROTOCOL_NBD:
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- case VIR_STORAGE_NET_PROTOCOL_HTTP:
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- case VIR_STORAGE_NET_PROTOCOL_HTTPS:
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- case VIR_STORAGE_NET_PROTOCOL_FTP:
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- case VIR_STORAGE_NET_PROTOCOL_FTPS:
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- case VIR_STORAGE_NET_PROTOCOL_TFTP:
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- case VIR_STORAGE_NET_PROTOCOL_ISCSI:
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- case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
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- if (!(uri = qemuBlockStorageSourceGetURI(src)))
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- return NULL;
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-
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- if (!(ret = virURIFormat(uri)))
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- return NULL;
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-
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+ if (!src->sliceStorage) {
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+ if (virStorageSourceIsLocalStorage(src)) {
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+ ret = g_strdup(src->path);
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return ret;
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+ }
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- case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
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- case VIR_STORAGE_NET_PROTOCOL_RBD:
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- case VIR_STORAGE_NET_PROTOCOL_VXHS:
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- case VIR_STORAGE_NET_PROTOCOL_SSH:
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- case VIR_STORAGE_NET_PROTOCOL_LAST:
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- case VIR_STORAGE_NET_PROTOCOL_NONE:
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- break;
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+ /* generate simplified URIs for the easy cases */
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+ if (actualType == VIR_STORAGE_TYPE_NETWORK &&
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+ src->nhosts == 1 &&
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+ src->hosts->transport == VIR_STORAGE_NET_HOST_TRANS_TCP) {
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+
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+ switch ((virStorageNetProtocol) src->protocol) {
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+ case VIR_STORAGE_NET_PROTOCOL_NBD:
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+ case VIR_STORAGE_NET_PROTOCOL_HTTP:
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+ case VIR_STORAGE_NET_PROTOCOL_HTTPS:
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+ case VIR_STORAGE_NET_PROTOCOL_FTP:
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+ case VIR_STORAGE_NET_PROTOCOL_FTPS:
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+ case VIR_STORAGE_NET_PROTOCOL_TFTP:
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+ case VIR_STORAGE_NET_PROTOCOL_ISCSI:
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+ case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
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+ if (!(uri = qemuBlockStorageSourceGetURI(src)))
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+ return NULL;
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+
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+ if (!(ret = virURIFormat(uri)))
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+ return NULL;
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+
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+ return ret;
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+
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+ case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
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+ case VIR_STORAGE_NET_PROTOCOL_RBD:
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+ case VIR_STORAGE_NET_PROTOCOL_VXHS:
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+ case VIR_STORAGE_NET_PROTOCOL_SSH:
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+ case VIR_STORAGE_NET_PROTOCOL_LAST:
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+ case VIR_STORAGE_NET_PROTOCOL_NONE:
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+ break;
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+ }
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}
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}
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@@ -1975,7 +1979,21 @@ qemuBlockGetBackingStoreString(virStorageSourcePtr src)
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if (!(backingProps = qemuBlockStorageSourceGetBackendProps(src, false, true, false)))
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return NULL;
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- if (!(backingJSON = virJSONValueToString(backingProps, false)))
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+ props = backingProps;
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+
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+ if (src->sliceStorage) {
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+ if (virJSONValueObjectCreate(&sliceProps,
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+ "s:driver", "raw",
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+ "U:offset", src->sliceStorage->offset,
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+ "U:size", src->sliceStorage->size,
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+ "a:file", &backingProps,
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+ NULL) < 0)
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+ return NULL;
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+
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+ props = sliceProps;
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+ }
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+
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+ if (!(backingJSON = virJSONValueToString(props, false)))
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return NULL;
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ret = g_strdup_printf("json:%s", backingJSON);
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--
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2.25.0
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