vmdk: Reject excess extents in blockdev-create
Clarify that the number of extents provided in BlockdevCreateOptionsVmdk must match the number of extents that will actually be used. Providing more extents will result in an error now. This requires adapting the test case to provide the right number of extents. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Kevin Wolf
parent
1c4e7b640b
commit
4a960ece17
29
block/vmdk.c
29
block/vmdk.c
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@ -1970,6 +1970,7 @@ static int coroutine_fn vmdk_co_do_create(int64_t size,
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{
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int extent_idx;
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BlockBackend *blk = NULL;
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BlockBackend *extent_blk;
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Error *local_err = NULL;
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char *desc = NULL;
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int ret = 0;
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@ -2107,7 +2108,6 @@ static int coroutine_fn vmdk_co_do_create(int64_t size,
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}
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extent_idx = 1;
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while (created_size < size) {
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BlockBackend *extent_blk;
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int64_t cur_size = MIN(size - created_size, extent_size);
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extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress,
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zeroed_grain, opaque, errp);
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@ -2121,6 +2121,17 @@ static int coroutine_fn vmdk_co_do_create(int64_t size,
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extent_idx++;
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blk_unref(extent_blk);
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}
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/* Check whether we got excess extents */
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extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain,
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opaque, NULL);
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if (extent_blk) {
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blk_unref(extent_blk);
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error_setg(errp, "List of extents contains unused extents");
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ret = -EINVAL;
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goto exit;
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}
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/* generate descriptor file */
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desc = g_strdup_printf(desc_template,
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g_random_int(),
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@ -2181,6 +2192,12 @@ static BlockBackend *vmdk_co_create_opts_cb(int64_t size, int idx,
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char *ext_filename = NULL;
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char *rel_filename = NULL;
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/* We're done, don't create excess extents. */
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if (size == -1) {
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assert(errp == NULL);
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return NULL;
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}
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if (idx == 0) {
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rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix);
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} else if (split) {
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@ -2342,10 +2359,12 @@ static BlockBackend *vmdk_co_create_cb(int64_t size, int idx,
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blk_set_allow_write_beyond_eof(blk, true);
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bdrv_unref(bs);
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ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp);
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if (ret) {
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blk_unref(blk);
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blk = NULL;
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if (size != -1) {
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ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp);
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if (ret) {
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blk_unref(blk);
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blk = NULL;
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}
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}
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return blk;
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}
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@ -4184,7 +4184,8 @@
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# twoGbMaxExtentSparse and twoGbMaxExtentFlat formats. For
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# monolithicFlat, only one entry is required; for
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# twoGbMaxExtent* formats, the number of entries required is
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# calculated as extent_number = virtual_size / 2GB.
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# calculated as extent_number = virtual_size / 2GB. Providing
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# more extents than will be used is an error.
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# @subformat The subformat of the VMDK image. Default: "monolithicSparse".
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# @backing-file The path of backing file. Default: no backing file is used.
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# @adapter-type The adapter type used to fill in the descriptor. Default: ide.
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@ -20,6 +20,7 @@
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import math
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import iotests
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from iotests import imgfmt
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@ -222,12 +223,15 @@ with iotests.FilePath('t.vmdk') as disk_path, \
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iotests.log("= %s %d =" % (subfmt, size))
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iotests.log("")
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num_extents = math.ceil(size / 2.0**31)
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extents = [ "ext%d" % (i) for i in range(1, num_extents + 1) ]
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vm.launch()
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blockdev_create(vm, { 'driver': imgfmt,
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'file': 'node0',
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'size': size,
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'subformat': subfmt,
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'extents': ['ext1', 'ext2', 'ext3'] })
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'extents': extents })
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vm.shutdown()
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iotests.img_info_log(disk_path)
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@ -154,6 +154,7 @@ Job failed: Extent [0] not specified
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 512, "subformat": "monolithicFlat"}}}
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{"return": {}}
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Job failed: List of extents contains unused extents
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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@ -161,7 +162,7 @@ Job failed: Extent [0] not specified
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= twoGbMaxExtentFlat 512 =
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 512, "subformat": "twoGbMaxExtentFlat"}}}
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1"], "file": "node0", "size": 512, "subformat": "twoGbMaxExtentFlat"}}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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@ -181,7 +182,7 @@ Format specific information:
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= twoGbMaxExtentSparse 512 =
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 512, "subformat": "twoGbMaxExtentSparse"}}}
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1"], "file": "node0", "size": 512, "subformat": "twoGbMaxExtentSparse"}}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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@ -203,7 +204,7 @@ Format specific information:
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= twoGbMaxExtentFlat 1073741824 =
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 1073741824, "subformat": "twoGbMaxExtentFlat"}}}
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1"], "file": "node0", "size": 1073741824, "subformat": "twoGbMaxExtentFlat"}}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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@ -223,7 +224,7 @@ Format specific information:
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= twoGbMaxExtentSparse 1073741824 =
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 1073741824, "subformat": "twoGbMaxExtentSparse"}}}
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1"], "file": "node0", "size": 1073741824, "subformat": "twoGbMaxExtentSparse"}}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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@ -245,7 +246,7 @@ Format specific information:
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= twoGbMaxExtentFlat 2147483648 =
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 2147483648, "subformat": "twoGbMaxExtentFlat"}}}
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1"], "file": "node0", "size": 2147483648, "subformat": "twoGbMaxExtentFlat"}}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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@ -265,7 +266,7 @@ Format specific information:
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= twoGbMaxExtentSparse 2147483648 =
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1", "ext2", "ext3"], "file": "node0", "size": 2147483648, "subformat": "twoGbMaxExtentSparse"}}}
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{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vmdk", "extents": ["ext1"], "file": "node0", "size": 2147483648, "subformat": "twoGbMaxExtentSparse"}}}
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{"return": {}}
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{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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{"return": {}}
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