[libvirt] [PATCH 9/9] Allow creating volumes with a backing store but no capacity
Ján Tomko
jtomko at redhat.com
Thu Feb 19 14:59:17 UTC 2015
The tool creating the image can get the capacity from the backing
storage. Just refresh the volume afterwards.
https://bugzilla.redhat.com/show_bug.cgi?id=958510
---
src/storage/storage_backend.c | 6 ++++++
src/storage/storage_backend_fs.c | 7 +++++++
src/storage/storage_backend_rbd.c | 6 ++++++
src/storage/storage_backend_sheepdog.c | 6 ++++++
src/storage/storage_driver.c | 14 ++++++++++++-
tests/storagevolxml2argvdata/qcow2-nocapacity.argv | 5 +++++
tests/storagevolxml2argvtest.c | 20 +++++++++++--------
.../vol-qcow2-nocapacity-backing.xml | 23 ++++++++++++++++++++++
8 files changed, 78 insertions(+), 9 deletions(-)
create mode 100644 tests/storagevolxml2argvdata/qcow2-nocapacity.argv
create mode 100644 tests/storagevolxml2xmlin/vol-qcow2-nocapacity-backing.xml
diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index ea5cabe..a4e75f5a5 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -487,6 +487,12 @@ virStorageBackendCreateRaw(virConnectPtr conn ATTRIBUTE_UNUSED,
goto cleanup;
}
+ if (vol->target.backingStore) {
+ virReportError(VIR_ERR_NO_SUPPORT, "%s",
+ _("backing storage not supported for raw volumes"));
+ goto cleanup;
+ }
+
if (flags & VIR_STORAGE_VOL_CREATE_REFLINK)
reflink_copy = true;
diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 77d894c..35385db 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -1037,6 +1037,13 @@ static int createFileDir(virConnectPtr conn ATTRIBUTE_UNUSED,
return -1;
}
+ if (vol->target.backingStore) {
+ virReportError(VIR_ERR_NO_SUPPORT, "%s",
+ _("backing storage not supported for directories volumes"));
+ return -1;
+ }
+
+
if ((err = virDirCreate(vol->target.path, vol->target.perms->mode,
vol->target.perms->uid,
vol->target.perms->gid,
diff --git a/src/storage/storage_backend_rbd.c b/src/storage/storage_backend_rbd.c
index 57182de..ae4bcb3 100644
--- a/src/storage/storage_backend_rbd.c
+++ b/src/storage/storage_backend_rbd.c
@@ -509,6 +509,12 @@ virStorageBackendRBDBuildVol(virConnectPtr conn,
virCheckFlags(0, -1);
+ if (!vol->target.capacity) {
+ virReportError(VIR_ERR_NO_SUPPORT, "%s",
+ _("volume capacity required for this storage pool"));
+ goto cleanup;
+ }
+
if (virStorageBackendRBDOpenRADOSConn(&ptr, conn, &pool->def->source) < 0)
goto cleanup;
diff --git a/src/storage/storage_backend_sheepdog.c b/src/storage/storage_backend_sheepdog.c
index 9419859..f389d9b 100644
--- a/src/storage/storage_backend_sheepdog.c
+++ b/src/storage/storage_backend_sheepdog.c
@@ -266,6 +266,12 @@ virStorageBackendSheepdogBuildVol(virConnectPtr conn,
virCheckFlags(0, -1);
+ if (!vol->target.capacity) {
+ virReportError(VIR_ERR_NO_SUPPORT, "%s",
+ _("volume capacity required for this pool"));
+ goto cleanup;
+ }
+
virCommandPtr cmd = virCommandNewArgList(COLLIE, "vdi", "create", vol->name, NULL);
virCommandAddArgFormat(cmd, "%llu", vol->target.capacity);
virStorageBackendSheepdogAddHostArg(cmd, pool);
diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
index 409b486..e8af90f 100644
--- a/src/storage/storage_driver.c
+++ b/src/storage/storage_driver.c
@@ -1649,10 +1649,18 @@ storageVolCreateXML(virStoragePoolPtr obj,
if ((backend = virStorageBackendForType(pool->def->type)) == NULL)
goto cleanup;
- voldef = virStorageVolDefParseString(pool->def, xmldesc, 0);
+ voldef = virStorageVolDefParseString(pool->def, xmldesc,
+ VIR_VOL_XML_PARSE_OPT_CAPACITY);
if (voldef == NULL)
goto cleanup;
+ if (!voldef->target.capacity && !backend->buildVol) {
+ virReportError(VIR_ERR_NO_SUPPORT,
+ "%s", _("volume capacity required for this "
+ "storage pool"));
+ goto cleanup;
+ }
+
if (virStorageVolCreateXMLEnsureACL(obj->conn, pool->def, voldef) < 0)
goto cleanup;
@@ -1725,6 +1733,10 @@ storageVolCreateXML(virStoragePoolPtr obj,
}
+ if (backend->refreshVol &&
+ backend->refreshVol(obj->conn, pool, voldef) < 0)
+ goto cleanup;
+
/* Update pool metadata */
pool->def->allocation += buildvoldef->target.allocation;
pool->def->available -= buildvoldef->target.allocation;
diff --git a/tests/storagevolxml2argvdata/qcow2-nocapacity.argv b/tests/storagevolxml2argvdata/qcow2-nocapacity.argv
new file mode 100644
index 0000000..1198cba
--- /dev/null
+++ b/tests/storagevolxml2argvdata/qcow2-nocapacity.argv
@@ -0,0 +1,5 @@
+qemu-img create \
+-f qcow2 \
+-b /dev/null \
+-o backing_fmt=raw,encryption=on \
+/var/lib/libvirt/images/OtherDemo.img
diff --git a/tests/storagevolxml2argvtest.c b/tests/storagevolxml2argvtest.c
index 52bb856..696659c 100644
--- a/tests/storagevolxml2argvtest.c
+++ b/tests/storagevolxml2argvtest.c
@@ -40,7 +40,8 @@ testCompareXMLToArgvFiles(bool shouldFail,
const char *inputvolxml,
const char *cmdline,
unsigned int flags,
- int imgformat)
+ int imgformat,
+ unsigned long parse_flags)
{
char *volXmlData = NULL;
char *poolXmlData = NULL;
@@ -49,7 +50,6 @@ testCompareXMLToArgvFiles(bool shouldFail,
char *expectedCmdline = NULL;
char *actualCmdline = NULL;
int ret = -1;
- unsigned long parse_flags = 0;
int len;
@@ -149,6 +149,7 @@ struct testInfo {
const char *cmdline;
unsigned int flags;
int imgformat;
+ unsigned long parseflags;
};
static int
@@ -183,7 +184,7 @@ testCompareXMLToArgvHelper(const void *data)
result = testCompareXMLToArgvFiles(info->shouldFail, poolxml, volxml,
inputpoolxml, inputvolxml,
cmdline, info->flags,
- info->imgformat);
+ info->imgformat, info->parseflags);
cleanup:
VIR_FREE(poolxml);
@@ -210,11 +211,11 @@ mymain(void)
int ret = 0;
unsigned int flags = VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA;
-#define DO_TEST_FULL(shouldFail, pool, vol, inputpool, inputvol, cmdline, \
- flags, imgformat) \
+#define DO_TEST_FULL(shouldFail, parseflags, pool, vol, inputpool, inputvol, \
+ cmdline, flags, imgformat) \
do { \
struct testInfo info = { shouldFail, pool, vol, inputpool, inputvol, \
- cmdline, flags, imgformat }; \
+ cmdline, flags, imgformat, parseflags }; \
if (virtTestRun("Storage Vol XML-2-argv " cmdline, \
testCompareXMLToArgvHelper, &info) < 0) \
ret = -1; \
@@ -222,10 +223,10 @@ mymain(void)
while (0);
#define DO_TEST(pool, ...) \
- DO_TEST_FULL(false, pool, __VA_ARGS__)
+ DO_TEST_FULL(false, 0, pool, __VA_ARGS__)
#define DO_TEST_FAIL(pool, ...) \
- DO_TEST_FULL(true, pool, __VA_ARGS__)
+ DO_TEST_FULL(true, 0, pool, __VA_ARGS__)
DO_TEST("pool-dir", "vol-qcow2",
NULL, NULL,
@@ -312,6 +313,9 @@ mymain(void)
DO_TEST("pool-dir", "vol-qcow2-nocapacity",
"pool-dir", "vol-file",
"qcow2-nocapacity-convert-prealloc", flags, FMT_OPTIONS);
+ DO_TEST_FULL(false, VIR_VOL_XML_PARSE_OPT_CAPACITY,
+ "pool-dir", "vol-qcow2-nocapacity-backing", NULL, NULL,
+ "qcow2-nocapacity", 0, FMT_OPTIONS);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
diff --git a/tests/storagevolxml2xmlin/vol-qcow2-nocapacity-backing.xml b/tests/storagevolxml2xmlin/vol-qcow2-nocapacity-backing.xml
new file mode 100644
index 0000000..f8e439b
--- /dev/null
+++ b/tests/storagevolxml2xmlin/vol-qcow2-nocapacity-backing.xml
@@ -0,0 +1,23 @@
+<volume>
+ <name>OtherDemo.img</name>
+ <key>/var/lib/libvirt/images/OtherDemo.img</key>
+ <source>
+ </source>
+ <target>
+ <path>/var/lib/libvirt/images/OtherDemo.img</path>
+ <format type='qcow2'/>
+ <permissions>
+ <mode>0644</mode>
+ <owner>0</owner>
+ <group>0</group>
+ <label>unconfined_u:object_r:virt_image_t:s0</label>
+ </permissions>
+ <encryption format='qcow'>
+ <secret type='passphrase' uuid='e78d4b51-a2af-485f-b0f5-afca709a80f4'/>
+ </encryption>
+ </target>
+ <backingStore>
+ <path>/dev/null</path>
+ <format type='raw'/>
+ </backingStore>
+</volume>
--
2.0.5
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