mirror of https://gitee.com/openkylin/libvirt.git
Allow cloning volumes with no capacity specified
In virStorageVolCreateXML, add VIR_VOL_XML_PARSE_NO_CAPACITY to the call parsing the XML of the new volume to make the capacity optional. If the capacity is omitted, use the capacity of the old volume. We already do that for values that are less than the original volume capacity.
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@ -1810,7 +1810,8 @@ storageVolCreateXMLFrom(virStoragePoolPtr obj,
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goto cleanup;
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}
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newvol = virStorageVolDefParseString(pool->def, xmldesc, 0);
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newvol = virStorageVolDefParseString(pool->def, xmldesc,
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VIR_VOL_XML_PARSE_NO_CAPACITY);
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if (newvol == NULL)
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goto cleanup;
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@ -1824,7 +1825,8 @@ storageVolCreateXMLFrom(virStoragePoolPtr obj,
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goto cleanup;
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}
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/* Is there ever a valid case for this? */
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/* Use the original volume's capacity in case the new capacity
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* is less than that, or it was omitted */
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if (newvol->target.capacity < origvol->target.capacity)
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newvol->target.capacity = origvol->target.capacity;
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@ -0,0 +1,4 @@
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qemu-img convert -f raw -O qcow2 \
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-o encryption=on,preallocation=metadata \
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/var/lib/libvirt/images/sparse.img \
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/var/lib/libvirt/images/OtherDemo.img
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@ -49,6 +49,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
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char *expectedCmdline = NULL;
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char *actualCmdline = NULL;
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int ret = -1;
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unsigned long parse_flags = 0;
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int len;
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@ -84,7 +85,10 @@ testCompareXMLToArgvFiles(bool shouldFail,
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goto cleanup;
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}
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if (!(vol = virStorageVolDefParseString(pool, volXmlData, 0)))
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if (inputvolxml)
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parse_flags |= VIR_VOL_XML_PARSE_NO_CAPACITY;
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if (!(vol = virStorageVolDefParseString(pool, volXmlData, parse_flags)))
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goto cleanup;
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if (inputvolxml &&
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@ -305,6 +309,9 @@ mymain(void)
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DO_TEST("pool-dir", "vol-qcow2-nocow",
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NULL, NULL,
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"qcow2-nocow-compat", 0, FMT_COMPAT);
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DO_TEST("pool-dir", "vol-qcow2-nocapacity",
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"pool-dir", "vol-file",
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"qcow2-nocapacity-convert-prealloc", flags, FMT_OPTIONS);
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return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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@ -0,0 +1,19 @@
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<volume>
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<name>OtherDemo.img</name>
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<key>/var/lib/libvirt/images/OtherDemo.img</key>
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<source>
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</source>
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<target>
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<path>/var/lib/libvirt/images/OtherDemo.img</path>
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<format type='qcow2'/>
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<permissions>
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<mode>0644</mode>
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<owner>0</owner>
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<group>0</group>
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<label>unconfined_u:object_r:virt_image_t:s0</label>
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</permissions>
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<encryption format='qcow'>
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<secret type='passphrase' uuid='e78d4b51-a2af-485f-b0f5-afca709a80f4'/>
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</encryption>
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</target>
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</volume>
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@ -0,0 +1,21 @@
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<volume type='file'>
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<name>OtherDemo.img</name>
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<key>/var/lib/libvirt/images/OtherDemo.img</key>
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<source>
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</source>
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<capacity unit='bytes'>0</capacity>
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<allocation unit='bytes'>0</allocation>
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<target>
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<path>/var/lib/libvirt/images/OtherDemo.img</path>
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<format type='qcow2'/>
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<permissions>
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<mode>0644</mode>
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<owner>0</owner>
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<group>0</group>
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<label>unconfined_u:object_r:virt_image_t:s0</label>
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</permissions>
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<encryption format='qcow'>
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<secret type='passphrase' uuid='e78d4b51-a2af-485f-b0f5-afca709a80f4'/>
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</encryption>
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</target>
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</volume>
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@ -126,6 +126,8 @@ mymain(void)
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DO_TEST("pool-sheepdog", "vol-sheepdog");
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DO_TEST("pool-gluster", "vol-gluster-dir");
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DO_TEST("pool-gluster", "vol-gluster-dir-neg-uid");
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DO_TEST_FULL("pool-dir", "vol-qcow2-nocapacity",
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VIR_VOL_XML_PARSE_NO_CAPACITY);
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return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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