[libvirt] [PATCH 1/6] conf: test backing chain lookup
John Ferlan
jferlan at redhat.com
Fri Apr 11 19:11:14 UTC 2014
On 04/11/2014 12:21 AM, Eric Blake wrote:
> I realized that we had no good test coverage of looking up a
> name from within a backing chain, even though code like
> block-commit is relying on it.
>
> * tests/virstoragetest.c (testStorageLookup): New function.
> (mymain): New tests.
>
> Signed-off-by: Eric Blake <eblake at redhat.com>
> ---
> tests/virstoragetest.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 167 insertions(+)
>
> diff --git a/tests/virstoragetest.c b/tests/virstoragetest.c
> index 029561c..2f181a2 100644
> --- a/tests/virstoragetest.c
> +++ b/tests/virstoragetest.c
> @@ -378,12 +378,81 @@ testStorageChain(const void *args)
> return ret;
> }
>
> +struct testLookupData
> +{
> + virStorageFileMetadataPtr chain;
> + const char *start;
> + const char *name;
> + const char *expResult;
> + virStorageFileMetadataPtr expMeta;
> + const char *expParent;
> +};
> +
> +static int
> +testStorageLookup(const void *args)
> +{
> + const struct testLookupData *data = args;
> + int ret = 0;
> + const char *actualResult;
> + virStorageFileMetadataPtr actualMeta;
> + const char *actualParent;
> +
> + /* This function is documented as giving results within chain, but
> + * as the same string may be duplicated into more than one field,
> + * we rely on STREQ rather than pointer equality. Test twice to
> + * ensure optional parameters don't cause NULL deref. */
> + actualResult = virStorageFileChainLookup(data->chain, data->start,
> + data->name, NULL, NULL);
> +
> + if (!data->expResult) {
> + if (!virGetLastError()) {
> + fprintf(stderr, "call should have failed\n");
> + ret = -1;
> + }
> + virResetLastError();
> + } else {
> + if (virGetLastError()) {
> + fprintf(stderr, "call should not have warned\n");
> + ret = -1;
Should ResetLast be called here? So as to not generate future false
positive/failure scenario. Only when running the test directly (e.g.
not via make check or make -C tests ...) with VIR_TEST_DEBUG (or
VERBOSE) did I see the error messages printed (for 0, 8, 16, & 21)
> + }
> + }
> +
> + if (STRNEQ_NULLABLE(data->expResult, actualResult)) {
> + fprintf(stderr, "result 1: expected %s, got %s\n",
> + NULLSTR(data->expResult), NULLSTR(actualResult));
> + ret = -1;
> + }
> +
> + actualResult = virStorageFileChainLookup(data->chain, data->start,
> + data->name, &actualMeta,
> + &actualParent);
So no LastError checking/clearing here? Just checking... I haven't
followed all the functionality changes before this that closely.
> + if (STRNEQ_NULLABLE(data->expResult, actualResult)) {
> + fprintf(stderr, "result 2: expected %s, got %s\n",
> + NULLSTR(data->expResult), NULLSTR(actualResult));
> + ret = -1;
> + }
> + if (data->expMeta != actualMeta) {
> + fprintf(stderr, "meta: expected %p, got %p\n",
> + data->expMeta, actualMeta);
> + ret = -1;
> + }
> + if (STRNEQ_NULLABLE(data->expParent, actualParent)) {
> + fprintf(stderr, "parent: expected %s, got %s\n",
> + NULLSTR(data->expParent), NULLSTR(actualParent));
> + ret = -1;
> + }
> +
> + return ret;
> +}
> +
> static int
> mymain(void)
> {
> int ret;
> virCommandPtr cmd = NULL;
> struct testChainData data;
> + virStorageFileMetadataPtr chain = NULL;
> + const char *start = NULL;
>
> /* Prep some files with qemu-img; if that is not found on PATH, or
> * if it lacks support for qcow2 and qed, skip this test. */
> @@ -771,7 +840,105 @@ mymain(void)
> (&wrap, &qcow2), EXP_WARN,
> (&wrap, &qcow2), ALLOW_PROBE | EXP_WARN);
>
> + /* Rewrite wrap and qcow2 back to 3-deep chain, absolute backing */
> + virCommandFree(cmd);
> + cmd = virCommandNewArgList(qemuimg, "rebase", "-u", "-f", "qcow2",
> + "-F", "qcow2", "-b", absraw, "qcow2", NULL);
> + if (virCommandRun(cmd, NULL) < 0)
> + ret = -1;
> +
> + /* Test behavior of chain lookups, absolute backing */
> + start = "wrap";
> + chain = virStorageFileGetMetadata("wrap", VIR_STORAGE_FILE_QCOW2,
> + -1, -1, false);
> + if (!chain)
> + return EXIT_FAILURE;
Whether it matters or not cmd is leaked...
> +
> +#define TEST_LOOKUP(id, name, result, meta, parent) \
> + do { \
> + struct testLookupData data2 = { chain, start, name, \
> + result, meta, parent, }; \
> + if (virtTestRun("Chain lookup " #id, \
> + testStorageLookup, &data2) < 0) \
> + ret = -1; \
> + } while (0)
> +
> + TEST_LOOKUP(0, "bogus", NULL, NULL, NULL);
> + TEST_LOOKUP(1, "wrap", start, chain, NULL);
> + TEST_LOOKUP(2, abswrap, start, chain, NULL);
> + TEST_LOOKUP(3, "qcow2", chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(4, absqcow2, chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(5, "raw", chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> + TEST_LOOKUP(6, absraw, chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> + TEST_LOOKUP(7, NULL, chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> +
> + /* Rewrite wrap and qcow2 back to 3-deep chain, relative backing */
> + virCommandFree(cmd);
> + cmd = virCommandNewArgList(qemuimg, "rebase", "-u", "-f", "qcow2",
> + "-F", "raw", "-b", "raw", "qcow2", NULL);
> + if (virCommandRun(cmd, NULL) < 0)
> + ret = -1;
> +
> + virCommandFree(cmd);
> + cmd = virCommandNewArgList(qemuimg, "rebase", "-u", "-f", "qcow2",
> + "-F", "qcow2", "-b", "qcow2", "wrap", NULL);
> + if (virCommandRun(cmd, NULL) < 0)
> + ret = -1;
> +
> + /* Test behavior of chain lookups, relative backing */
> + start = abswrap;
> + virStorageFileFreeMetadata(chain);
> + chain = virStorageFileGetMetadata(abswrap, VIR_STORAGE_FILE_QCOW2,
> + -1, -1, false);
> + if (!chain)
> + return EXIT_FAILURE;
Whether it matters or not cmd is leaked...
> +
> + TEST_LOOKUP(8, "bogus", NULL, NULL, NULL);
> + TEST_LOOKUP(9, "wrap", start, chain, NULL);
> + TEST_LOOKUP(10, abswrap, start, chain, NULL);
> + TEST_LOOKUP(11, "qcow2", chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(12, absqcow2, chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(13, "raw", chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> + TEST_LOOKUP(14, absraw, chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> + TEST_LOOKUP(15, NULL, chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> +
> + /* Use link to wrap with cross-directory relative backing */
> + virCommandFree(cmd);
> + cmd = virCommandNewArgList(qemuimg, "rebase", "-u", "-f", "qcow2",
> + "-F", "qcow2", "-b", "../qcow2", "wrap", NULL);
> + if (virCommandRun(cmd, NULL) < 0)
> + ret = -1;
> +
> + /* Test behavior of chain lookups, relative backing */
> + start = "sub/link2";
> + virStorageFileFreeMetadata(chain);
> + chain = virStorageFileGetMetadata(start, VIR_STORAGE_FILE_QCOW2,
> + -1, -1, false);
> + if (!chain)
> + return EXIT_FAILURE;
> +
> + TEST_LOOKUP(16, "bogus", NULL, NULL, NULL);
> + TEST_LOOKUP(17, "sub/link2", start, chain, NULL);
> + TEST_LOOKUP(18, "wrap", start, chain, NULL);
> + TEST_LOOKUP(19, abswrap, start, chain, NULL);
> + TEST_LOOKUP(20, "../qcow2", chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(21, "qcow2", chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(22, absqcow2, chain->backingStore, chain->backingMeta, start);
> + TEST_LOOKUP(23, "raw", chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> + TEST_LOOKUP(24, absraw, chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> + TEST_LOOKUP(25, NULL, chain->backingMeta->backingStore,
> + chain->backingMeta->backingMeta, chain->backingStore);
> +
> /* Final cleanup */
> + virStorageFileFreeMetadata(chain);
> testCleanupImages();
> virCommandFree(cmd);
>
ACK - in general
John
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