[libvirt] [PATCH v2 1/3] storage: Adjust qemu-img switches check

Since we support QEMU 0.12 and later, checking for support of specific flags added prior to that isn't necessary. Thus start with the base of having the "-o options" available for the qemu-img create option and then determine whether we have the compat option for qcow2 files (which would be necessary up through qemu 2.0 where the default changes to compat 0.11). Adjust test to no long check for NONE and FLAG options as well was removing results of tests that would use that option. Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- src/storage/storage_backend.c | 91 +++++++--------------- tests/storagevolxml2argvdata/qcow2-flag.argv | 2 - .../qcow2-nobacking-convert-flag.argv | 2 - .../qcow2-nobacking-convert-none.argv | 2 - .../qcow2-nobacking-flag.argv | 1 - .../qcow2-nobacking-none.argv | 1 - tests/storagevolxml2argvdata/qcow2-none.argv | 1 - tests/storagevolxml2argvtest.c | 22 +----- 8 files changed, 29 insertions(+), 93 deletions(-) delete mode 100644 tests/storagevolxml2argvdata/qcow2-flag.argv delete mode 100644 tests/storagevolxml2argvdata/qcow2-nobacking-convert-flag.argv delete mode 100644 tests/storagevolxml2argvdata/qcow2-nobacking-convert-none.argv delete mode 100644 tests/storagevolxml2argvdata/qcow2-nobacking-flag.argv delete mode 100644 tests/storagevolxml2argvdata/qcow2-nobacking-none.argv delete mode 100644 tests/storagevolxml2argvdata/qcow2-none.argv diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index 8f03a6e..ff3f8c1 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -869,10 +869,15 @@ virStoragePloopResize(virStorageVolDefPtr vol, return ret; } +/* Flag values shared w/ storagevolxml2argvtest.c. + * + * QEMU_IMG_BACKING_FORMAT_OPTIONS (added in qemu 0.11) + * QEMU_IMG_BACKING_FORMAT_OPTIONS_COMPAT + * was made necessary due to 2.0 change to change the default + * qcow2 file format from 0.10 to 1.1. + */ enum { - QEMU_IMG_BACKING_FORMAT_NONE = 0, - QEMU_IMG_BACKING_FORMAT_FLAG, - QEMU_IMG_BACKING_FORMAT_OPTIONS, + QEMU_IMG_BACKING_FORMAT_OPTIONS = 0, QEMU_IMG_BACKING_FORMAT_OPTIONS_COMPAT, }; @@ -904,46 +909,18 @@ virStorageBackendQemuImgSupportsCompat(const char *qemuimg) static int virStorageBackendQEMUImgBackingFormat(const char *qemuimg) { - char *help = NULL; - char *start; - char *end; - char *tmp; - int ret = -1; - int exitstatus; - virCommandPtr cmd = virCommandNewArgList(qemuimg, "-h", NULL); - - virCommandAddEnvString(cmd, "LC_ALL=C"); - virCommandSetOutputBuffer(cmd, &help); - virCommandClearCaps(cmd); - - /* qemuimg doesn't return zero exit status on -h, - * therefore we need to provide pointer for storing - * exit status, although we don't parse it any later */ - if (virCommandRun(cmd, &exitstatus) < 0) - goto cleanup; - - if ((start = strstr(help, " create ")) == NULL || - (end = strstr(start, "\n")) == NULL) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("unable to parse qemu-img output '%s'"), - help); - goto cleanup; - } - if (((tmp = strstr(start, "-F fmt")) && tmp < end) || - ((tmp = strstr(start, "-F backing_fmt")) && tmp < end)) { - ret = QEMU_IMG_BACKING_FORMAT_FLAG; - } else if ((tmp = strstr(start, "[-o options]")) && tmp < end) { - if (virStorageBackendQemuImgSupportsCompat(qemuimg)) - ret = QEMU_IMG_BACKING_FORMAT_OPTIONS_COMPAT; - else - ret = QEMU_IMG_BACKING_FORMAT_OPTIONS; - } else { - ret = QEMU_IMG_BACKING_FORMAT_NONE; - } + /* As of QEMU 0.11 the [-o options] support was added via qemu + * commit id '9ea2ea71', so we start with that base and figure + * out what else we have */ + int ret = QEMU_IMG_BACKING_FORMAT_OPTIONS; + + /* QEMU 2.0 changed to using a format that only QEMU 1.1 and newer + * understands. Since we still support QEMU 0.12 and newer, we need + * to be able to handle the previous format as can be set via a + * compat=0.10 option. */ + if (virStorageBackendQemuImgSupportsCompat(qemuimg)) + ret = QEMU_IMG_BACKING_FORMAT_OPTIONS_COMPAT; - cleanup: - virCommandFree(cmd); - VIR_FREE(help); return ret; } @@ -1218,29 +1195,17 @@ virStorageBackendCreateQemuImgCmdFromVol(virConnectPtr conn, if (info.backingPath) virCommandAddArgList(cmd, "-b", info.backingPath, NULL); - if (imgformat >= QEMU_IMG_BACKING_FORMAT_OPTIONS) { - if (info.format == VIR_STORAGE_FILE_QCOW2 && !info.compat && - imgformat == QEMU_IMG_BACKING_FORMAT_OPTIONS_COMPAT) - info.compat = "0.10"; + if (info.format == VIR_STORAGE_FILE_QCOW2 && !info.compat && + imgformat == QEMU_IMG_BACKING_FORMAT_OPTIONS_COMPAT) + info.compat = "0.10"; - if (virStorageBackendCreateQemuImgOpts(&opts, info) < 0) { - virCommandFree(cmd); - return NULL; - } - if (opts) - virCommandAddArgList(cmd, "-o", opts, NULL); - VIR_FREE(opts); - } else { - if (info.backingPath) { - if (imgformat == QEMU_IMG_BACKING_FORMAT_FLAG) - virCommandAddArgList(cmd, "-F", backingType, NULL); - else - VIR_DEBUG("Unable to set backing store format for %s with %s", - info.path, create_tool); - } - if (info.encryption) - virCommandAddArg(cmd, "-e"); + if (virStorageBackendCreateQemuImgOpts(&opts, info) < 0) { + virCommandFree(cmd); + return NULL; } + if (opts) + virCommandAddArgList(cmd, "-o", opts, NULL); + VIR_FREE(opts); if (info.inputPath) virCommandAddArg(cmd, info.inputPath); diff --git a/tests/storagevolxml2argvdata/qcow2-flag.argv b/tests/storagevolxml2argvdata/qcow2-flag.argv deleted file mode 100644 index 5f87ad5..0000000 --- a/tests/storagevolxml2argvdata/qcow2-flag.argv +++ /dev/null @@ -1,2 +0,0 @@ -qemu-img create -f qcow2 -b /dev/null -F raw \ --e /var/lib/libvirt/images/OtherDemo.img 5242880K diff --git a/tests/storagevolxml2argvdata/qcow2-nobacking-convert-flag.argv b/tests/storagevolxml2argvdata/qcow2-nobacking-convert-flag.argv deleted file mode 100644 index 57bdd4a..0000000 --- a/tests/storagevolxml2argvdata/qcow2-nobacking-convert-flag.argv +++ /dev/null @@ -1,2 +0,0 @@ -qemu-img convert -f raw -O qcow2 -e /var/lib/libvirt/images/sparse.img \ -/var/lib/libvirt/images/OtherDemo.img diff --git a/tests/storagevolxml2argvdata/qcow2-nobacking-convert-none.argv b/tests/storagevolxml2argvdata/qcow2-nobacking-convert-none.argv deleted file mode 100644 index 57bdd4a..0000000 --- a/tests/storagevolxml2argvdata/qcow2-nobacking-convert-none.argv +++ /dev/null @@ -1,2 +0,0 @@ -qemu-img convert -f raw -O qcow2 -e /var/lib/libvirt/images/sparse.img \ -/var/lib/libvirt/images/OtherDemo.img diff --git a/tests/storagevolxml2argvdata/qcow2-nobacking-flag.argv b/tests/storagevolxml2argvdata/qcow2-nobacking-flag.argv deleted file mode 100644 index 62ad85f..0000000 --- a/tests/storagevolxml2argvdata/qcow2-nobacking-flag.argv +++ /dev/null @@ -1 +0,0 @@ -qemu-img create -f qcow2 -e /var/lib/libvirt/images/OtherDemo.img 5242880K diff --git a/tests/storagevolxml2argvdata/qcow2-nobacking-none.argv b/tests/storagevolxml2argvdata/qcow2-nobacking-none.argv deleted file mode 100644 index 62ad85f..0000000 --- a/tests/storagevolxml2argvdata/qcow2-nobacking-none.argv +++ /dev/null @@ -1 +0,0 @@ -qemu-img create -f qcow2 -e /var/lib/libvirt/images/OtherDemo.img 5242880K diff --git a/tests/storagevolxml2argvdata/qcow2-none.argv b/tests/storagevolxml2argvdata/qcow2-none.argv deleted file mode 100644 index 10b7175..0000000 --- a/tests/storagevolxml2argvdata/qcow2-none.argv +++ /dev/null @@ -1 +0,0 @@ -qemu-img create -f qcow2 -b /dev/null -e /var/lib/libvirt/images/OtherDemo.img 5242880K diff --git a/tests/storagevolxml2argvtest.c b/tests/storagevolxml2argvtest.c index 393123b..af7de0b 100644 --- a/tests/storagevolxml2argvtest.c +++ b/tests/storagevolxml2argvtest.c @@ -168,9 +168,7 @@ testCompareXMLToArgvHelper(const void *data) } enum { - FMT_NONE = 0, - FMT_FLAG, - FMT_OPTIONS, + FMT_OPTIONS = 0, FMT_COMPAT, }; @@ -217,24 +215,6 @@ mymain(void) DO_TEST_FAIL("pool-dir", "vol-qcow2", "pool-dir", "vol-file", "qcow2-convert-prealloc", flags, FMT_OPTIONS); - DO_TEST("pool-dir", "vol-qcow2", - NULL, NULL, - "qcow2-flag", 0, FMT_FLAG); - DO_TEST("pool-dir", "vol-qcow2-nobacking", - NULL, NULL, - "qcow2-nobacking-flag", 0, FMT_FLAG); - DO_TEST("pool-dir", "vol-qcow2-nobacking", - "pool-dir", "vol-file", - "qcow2-nobacking-convert-flag", 0, FMT_FLAG); - DO_TEST("pool-dir", "vol-qcow2", - NULL, NULL, - "qcow2-none", 0, FMT_NONE); - DO_TEST("pool-dir", "vol-qcow2-nobacking", - NULL, NULL, - "qcow2-nobacking-none", 0, FMT_NONE); - DO_TEST("pool-dir", "vol-qcow2-nobacking", - "pool-dir", "vol-file", - "qcow2-nobacking-convert-none", 0, FMT_NONE); DO_TEST("pool-dir", "vol-qcow2-lazy", NULL, NULL, "qcow2-lazy", 0, FMT_OPTIONS); -- 2.5.5