Create virStorageSourceGetBackingStore function in preparation for quorum: Actually, if we want to get a backing store inside a virStorageSource we have to do it manually(src->backingStore = backingStore). The problem is that with a quorum, a virStorageSource can contain multiple backing stores, and src->backingStore can be treated as a virStorageSourcePtr or a virStorageSourcePtrPtr. Due to these reason, we need to simplify the manipulation of virStorageSource, and create a function to get the asked backingStore in a virStorageSource For now, this function only return the backingStore field Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/libvirt_private.syms | 1 + src/util/virstoragefile.c | 8 ++++++++ src/util/virstoragefile.h | 3 +++ 3 files changed, 12 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 4b7e165..8854b26 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2163,6 +2163,7 @@ virStorageSourceClear; virStorageSourceCopy; virStorageSourceFree; virStorageSourceGetActualType; +virStorageSourceGetBackingStore; virStorageSourceGetSecurityLabelDef; virStorageSourceInitChainElement; virStorageSourceIsEmpty; diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c index 2aa1d90..3fad323 100644 --- a/src/util/virstoragefile.c +++ b/src/util/virstoragefile.c @@ -1809,6 +1809,14 @@ virStorageSourcePoolDefCopy(const virStorageSourcePoolDef *src) } +virStorageSourcePtr +virStorageSourceGetBackingStore(const virStorageSource *src, + size_t pos ATTRIBUTE_UNUSED) +{ + return src->backingStore; +} + + /** * virStorageSourcePtr: * diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h index b98fe25..8cd4854 100644 --- a/src/util/virstoragefile.h +++ b/src/util/virstoragefile.h @@ -289,6 +289,9 @@ struct _virStorageSource { # define DEV_BSIZE 512 # endif +virStorageSourcePtr virStorageSourceGetBackingStore(const virStorageSource *src, + size_t pos); + int virStorageFileProbeFormat(const char *path, uid_t uid, gid_t gid); int virStorageFileProbeFormatFromBuf(const char *path, char *buf, -- 2.6.1

Uniformize backing store usage by calling virStorageSourceGetBackingStore instead of setting backing store manually. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- src/conf/domain_conf.c | 7 ++++--- src/conf/storage_conf.c | 6 +++--- src/qemu/qemu_cgroup.c | 4 ++-- src/qemu/qemu_domain.c | 2 +- src/qemu/qemu_driver.c | 18 ++++++++++-------- src/qemu/qemu_monitor_json.c | 4 +++- src/security/security_dac.c | 2 +- src/security/security_selinux.c | 4 ++-- src/security/virt-aa-helper.c | 2 +- src/storage/storage_backend.c | 20 ++++++++++++-------- src/storage/storage_backend_fs.c | 31 +++++++++++++++++-------------- src/storage/storage_backend_gluster.c | 8 +++++--- src/storage/storage_backend_logical.c | 10 ++++++---- src/util/virstoragefile.c | 20 ++++++++++---------- tests/virstoragetest.c | 14 +++++++------- 15 files changed, 84 insertions(+), 68 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 9a0c7fc..e0befc3 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -18897,7 +18897,7 @@ virDomainDiskBackingStoreFormat(virBufferPtr buf, /* We currently don't output seclabels for backing chain element */ if (virDomainDiskSourceFormatInternal(buf, backingStore, 0, 0, true) < 0 || virDomainDiskBackingStoreFormat(buf, - backingStore->backingStore, + virStorageSourceGetBackingStore(backingStore, 0), backingStore->backingStoreRaw, idx + 1) < 0) return -1; @@ -19018,7 +19018,8 @@ virDomainDiskDefFormat(virBufferPtr buf, /* Don't format backingStore to inactive XMLs until the code for * persistent storage of backing chains is ready. */ if (!(flags & VIR_DOMAIN_DEF_FORMAT_INACTIVE) && - virDomainDiskBackingStoreFormat(buf, def->src->backingStore, + virDomainDiskBackingStoreFormat(buf, + virStorageSourceGetBackingStore(def->src, 0), def->src->backingStoreRaw, 1) < 0) return -1; @@ -23317,7 +23318,7 @@ virDomainDiskDefForeachPath(virDomainDiskDefPtr disk, } } - for (tmp = disk->src; tmp; tmp = tmp->backingStore) { + for (tmp = disk->src; tmp; tmp = virStorageSourceGetBackingStore(tmp, 0)) { int actualType = virStorageSourceGetActualType(tmp); /* execute the callback only for local storage */ if (actualType != VIR_STORAGE_TYPE_NETWORK && diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c index 9b8abea..d048e39 100644 --- a/src/conf/storage_conf.c +++ b/src/conf/storage_conf.c @@ -1330,7 +1330,7 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool, if (virStorageSize(unit, capacity, &ret->target.capacity) < 0) goto error; } else if (!(flags & VIR_VOL_XML_PARSE_NO_CAPACITY) && - !((flags & VIR_VOL_XML_PARSE_OPT_CAPACITY) && ret->target.backingStore)) { + !((flags & VIR_VOL_XML_PARSE_OPT_CAPACITY) && virStorageSourceGetBackingStore(&ret->target, 0))) { virReportError(VIR_ERR_XML_ERROR, "%s", _("missing capacity element")); goto error; } @@ -1644,9 +1644,9 @@ virStorageVolDefFormat(virStoragePoolDefPtr pool, &def->target, "target") < 0) goto cleanup; - if (def->target.backingStore && + if (virStorageSourceGetBackingStore(&def->target, 0) && virStorageVolTargetDefFormat(options, &buf, - def->target.backingStore, + virStorageSourceGetBackingStore(&def->target, 0), "backingStore") < 0) goto cleanup; diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c index a8e0b8c..f93782b 100644 --- a/src/qemu/qemu_cgroup.c +++ b/src/qemu/qemu_cgroup.c @@ -121,7 +121,7 @@ qemuSetupDiskCgroup(virDomainObjPtr vm, virStorageSourcePtr next; bool forceReadonly = false; - for (next = disk->src; next; next = next->backingStore) { + for (next = disk->src; next; next = virStorageSourceGetBackingStore(next, 0)) { if (qemuSetImageCgroupInternal(vm, next, false, forceReadonly) < 0) return -1; @@ -139,7 +139,7 @@ qemuTeardownDiskCgroup(virDomainObjPtr vm, { virStorageSourcePtr next; - for (next = disk->src; next; next = next->backingStore) { + for (next = disk->src; next; next = virStorageSourceGetBackingStore(next, 0)) { if (qemuSetImageCgroup(vm, next, true) < 0) return -1; } diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 890d8ed..1298e44 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -2968,7 +2968,7 @@ qemuDomainDetermineDiskChain(virQEMUDriverPtr driver, if (virStorageSourceIsEmpty(disk->src)) goto cleanup; - if (disk->src->backingStore) { + if (virStorageSourceGetBackingStore(disk->src, 0)) { if (force_probe) virStorageSourceBackingStoreClear(disk->src); else diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index a2cc002..ac45d56 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -14301,13 +14301,13 @@ qemuDomainSnapshotUndoSingleDiskActive(virQEMUDriverPtr driver, /* Update vm in place to match changes. */ tmp = disk->src; - disk->src = tmp->backingStore; + disk->src = virStorageSourceGetBackingStore(tmp, 0); tmp->backingStore = NULL; virStorageSourceFree(tmp); if (persistDisk) { tmp = persistDisk->src; - persistDisk->src = tmp->backingStore; + persistDisk->src = virStorageSourceGetBackingStore(tmp, 0); tmp->backingStore = NULL; virStorageSourceFree(tmp); } @@ -16298,7 +16298,7 @@ qemuDomainBlockPullCommon(virQEMUDriverPtr driver, goto endjob; } - if (virStorageFileGetRelativeBackingPath(disk->src->backingStore, + if (virStorageFileGetRelativeBackingPath(virStorageSourceGetBackingStore(disk->src, 0), baseSource, &backingPath) < 0) goto endjob; @@ -16651,6 +16651,7 @@ qemuDomainBlockCopyCommon(virDomainObjPtr vm, virQEMUDriverConfigPtr cfg = NULL; const char *format = NULL; int desttype = virStorageSourceGetActualType(mirror); + virStorageSourcePtr backingStore; /* Preliminaries: find the disk we are editing, sanity checks */ virCheckFlags(VIR_DOMAIN_BLOCK_COPY_SHALLOW | @@ -16694,8 +16695,9 @@ qemuDomainBlockCopyCommon(virDomainObjPtr vm, if (qemuDomainDetermineDiskChain(driver, vm, disk, false, true) < 0) goto endjob; + backingStore = virStorageSourceGetBackingStore(disk->src, 0); /* clear the _SHALLOW flag if there is only one layer */ - if (!disk->src->backingStore) + if (!backingStore) flags &= ~VIR_DOMAIN_BLOCK_COPY_SHALLOW; /* unless the user provides a pre-created file, shallow copy into a raw @@ -17102,7 +17104,7 @@ qemuDomainBlockCommit(virDomainPtr dom, goto endjob; } - if (!topSource->backingStore) { + if (!virStorageSourceGetBackingStore(topSource, 0)) { virReportError(VIR_ERR_INVALID_ARG, _("top '%s' in chain for '%s' has no backing file"), topSource->path, path); @@ -17110,14 +17112,14 @@ qemuDomainBlockCommit(virDomainPtr dom, } if (!base && (flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW)) - baseSource = topSource->backingStore; + baseSource = virStorageSourceGetBackingStore(topSource, 0); else if (virStorageFileParseChainIndex(disk->dst, base, &baseIndex) < 0 || !(baseSource = virStorageFileChainLookup(disk->src, topSource, base, baseIndex, NULL))) goto endjob; if ((flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW) && - baseSource != topSource->backingStore) { + baseSource != virStorageSourceGetBackingStore(topSource, 0)) { virReportError(VIR_ERR_INVALID_ARG, _("base '%s' is not immediately below '%s' in chain " "for '%s'"), @@ -19395,7 +19397,7 @@ qemuDomainGetStatsBlock(virQEMUDriverPtr driver, goto cleanup; visited++; backing_idx++; - src = src->backingStore; + src = virStorageSourceGetBackingStore(src, 0); } } diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index b39b29b..9834130 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -3785,7 +3785,9 @@ qemuMonitorJSONDiskNameLookupOne(virJSONValuePtr image, return NULL; if (top != target) { backing = virJSONValueObjectGetObject(image, "backing-image"); - return qemuMonitorJSONDiskNameLookupOne(backing, top->backingStore, + virStorageSourcePtr backingStore = + virStorageSourceGetBackingStore(top, 0); + return qemuMonitorJSONDiskNameLookupOne(backing, backingStore, target); } if (VIR_STRDUP(ret, virJSONValueObjectGetString(image, "filename")) < 0) diff --git a/src/security/security_dac.c b/src/security/security_dac.c index 7200a1a..dbdcaa1 100644 --- a/src/security/security_dac.c +++ b/src/security/security_dac.c @@ -454,7 +454,7 @@ virSecurityDACSetSecurityDiskLabel(virSecurityManagerPtr mgr, { virStorageSourcePtr next; - for (next = disk->src; next; next = next->backingStore) { + for (next = disk->src; next; next = virStorageSourceGetBackingStore(next, 0)) { if (virSecurityDACSetSecurityImageLabel(mgr, def, next) < 0) return -1; } diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c index 80b0886..23f8e8a 100644 --- a/src/security/security_selinux.c +++ b/src/security/security_selinux.c @@ -1158,7 +1158,7 @@ virSecuritySELinuxRestoreSecurityImageLabelInt(virSecurityManagerPtr mgr, * be tracked in domain XML, at which point labelskip should be a * per-file attribute instead of a disk attribute. */ if (disk_seclabel && disk_seclabel->labelskip && - !src->backingStore) + !virStorageSourceGetBackingStore(src, 0)) return 0; /* Don't restore labels on readonly/shared disks, because other VMs may @@ -1292,7 +1292,7 @@ virSecuritySELinuxSetSecurityDiskLabel(virSecurityManagerPtr mgr, bool first = true; virStorageSourcePtr next; - for (next = disk->src; next; next = next->backingStore) { + for (next = disk->src; next; next = virStorageSourceGetBackingStore(next, 0)) { if (virSecuritySELinuxSetSecurityImageLabelInternal(mgr, def, next, first) < 0) return -1; diff --git a/src/security/virt-aa-helper.c b/src/security/virt-aa-helper.c index 5de56e5..dddde1c 100644 --- a/src/security/virt-aa-helper.c +++ b/src/security/virt-aa-helper.c @@ -967,7 +967,7 @@ get_files(vahControl * ctl) /* XXX - if we knew the qemu user:group here we could send it in * so that the open could be re-tried as that user:group. */ - if (!disk->src->backingStore) { + if (!virStorageSourceGetBackingStore(disk->src, 0)) { bool probe = ctl->allowDiskFormatProbing; virStorageFileGetMetadata(disk->src, -1, -1, probe, false); } diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index a375fe0..3b504e9 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -907,6 +907,7 @@ virStorageBackendCreateQemuImgCmdFromVol(virConnectPtr conn, .features = vol->target.features, .nocow = vol->target.nocow, }; + virStorageSourcePtr backingStore; virCheckFlags(VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA, NULL); @@ -955,12 +956,13 @@ virStorageBackendCreateQemuImgCmdFromVol(virConnectPtr conn, } } - if (vol->target.backingStore) { + backingStore = virStorageSourceGetBackingStore(&vol->target, 0); + if (backingStore) { int accessRetCode = -1; char *absolutePath = NULL; - info.backingFormat = vol->target.backingStore->format; - info.backingPath = vol->target.backingStore->path; + info.backingFormat = backingStore->format; + info.backingPath = backingStore->path; if (info.preallocate) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", @@ -973,8 +975,10 @@ virStorageBackendCreateQemuImgCmdFromVol(virConnectPtr conn, * backing store, not really sure what use it serves though, and it * may cause issues with lvm. Untested essentially. */ - if (inputvol && inputvol->target.backingStore && - STRNEQ_NULLABLE(inputvol->target.backingStore->path, info.backingPath)) { + if (inputvol && + virStorageSourceGetBackingStore(&inputvol->target, 0) && + STRNEQ_NULLABLE(virStorageSourceGetBackingStore(&inputvol->target, 0)->path, + info.backingPath)) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("a different backing store cannot be specified.")); return NULL; @@ -1164,7 +1168,7 @@ virStorageBackendCreateQcowCreate(virConnectPtr conn ATTRIBUTE_UNUSED, vol->target.format); return -1; } - if (vol->target.backingStore != NULL) { + if (virStorageSourceGetBackingStore(&vol->target, 0) != NULL) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("copy-on-write image not supported with " "qcow-create")); @@ -1603,8 +1607,8 @@ virStorageBackendUpdateVolInfo(virStorageVolDefPtr vol, openflags)) < 0) return ret; - if (vol->target.backingStore && - (ret = virStorageBackendUpdateVolTargetInfo(vol->target.backingStore, + if (virStorageSourceGetBackingStore(&vol->target, 0) && + (ret = virStorageBackendUpdateVolTargetInfo(virStorageSourceGetBackingStore(&vol->target, 0), withBlockVolFormat, VIR_STORAGE_VOL_OPEN_DEFAULT | VIR_STORAGE_VOL_OPEN_NOERROR) < 0)) diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c index 99ea394..cb33ac0 100644 --- a/src/storage/storage_backend_fs.c +++ b/src/storage/storage_backend_fs.c @@ -70,6 +70,7 @@ virStorageBackendProbeTarget(virStorageSourcePtr target, int ret = -1; int rc; virStorageSourcePtr meta = NULL; + virStorageSourcePtr backingStore; struct stat sb; if (encryption) @@ -99,37 +100,39 @@ virStorageBackendProbeTarget(virStorageSourcePtr target, if (!(target->backingStore = virStorageSourceNewFromBacking(meta))) goto cleanup; - target->backingStore->format = backingStoreFormat; + backingStore = virStorageSourceGetBackingStore(target, 0); + backingStore->format = backingStoreFormat; /* XXX: Remote storage doesn't play nicely with volumes backed by * remote storage. To avoid trouble, just fake the backing store is RAW * and put the string from the metadata as the path of the target. */ - if (!virStorageSourceIsLocalStorage(target->backingStore)) { - virStorageSourceFree(target->backingStore); + if (!virStorageSourceIsLocalStorage(backingStore)) { + virStorageSourceFree(backingStore); - if (VIR_ALLOC(target->backingStore) < 0) + if (VIR_ALLOC(backingStore) < 0) goto cleanup; - target->backingStore->type = VIR_STORAGE_TYPE_NETWORK; - target->backingStore->path = meta->backingStoreRaw; + target->backingStore = backingStore; + backingStore->type = VIR_STORAGE_TYPE_NETWORK; + backingStore->path = meta->backingStoreRaw; meta->backingStoreRaw = NULL; - target->backingStore->format = VIR_STORAGE_FILE_RAW; + backingStore->format = VIR_STORAGE_FILE_RAW; } - if (target->backingStore->format == VIR_STORAGE_FILE_AUTO) { - if ((rc = virStorageFileProbeFormat(target->backingStore->path, + if (backingStore->format == VIR_STORAGE_FILE_AUTO) { + if ((rc = virStorageFileProbeFormat(backingStore->path, -1, -1)) < 0) { /* If the backing file is currently unavailable or is * accessed via remote protocol only log an error, fake the * format as RAW and continue. Returning -1 here would * disable the whole storage pool, making it unavailable for * even maintenance. */ - target->backingStore->format = VIR_STORAGE_FILE_RAW; + backingStore->format = VIR_STORAGE_FILE_RAW; virReportError(VIR_ERR_INTERNAL_ERROR, _("cannot probe backing volume format: %s"), - target->backingStore->path); + backingStore->path); } else { - target->backingStore->format = rc; + backingStore->format = rc; } } } @@ -918,8 +921,8 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn ATTRIBUTE_UNUSED, if (vol->target.format == VIR_STORAGE_FILE_DIR) vol->type = VIR_STORAGE_VOL_DIR; - if (vol->target.backingStore) { - ignore_value(virStorageBackendUpdateVolTargetInfo(vol->target.backingStore, + if (virStorageSourceGetBackingStore(&vol->target, 0)) { + ignore_value(virStorageBackendUpdateVolTargetInfo(virStorageSourceGetBackingStore(&vol->target, 0), false, VIR_STORAGE_VOL_OPEN_DEFAULT)); /* If this failed, the backing file is currently unavailable, diff --git a/src/storage/storage_backend_gluster.c b/src/storage/storage_backend_gluster.c index d2e79bc..9bddb3b 100644 --- a/src/storage/storage_backend_gluster.c +++ b/src/storage/storage_backend_gluster.c @@ -247,6 +247,7 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state, char *header = NULL; ssize_t len = VIR_STORAGE_MAX_HEADER; int backingFormat; + virStorageSourcePtr backingStore; *volptr = NULL; @@ -302,13 +303,14 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state, if (meta->backingStoreRaw) { if (VIR_ALLOC(vol->target.backingStore) < 0) goto cleanup; + backingStore = virStorageSourceGetBackingStore(&vol->target, 0); - vol->target.backingStore->path = meta->backingStoreRaw; + backingStore->path = meta->backingStoreRaw; if (backingFormat < 0) - vol->target.backingStore->format = VIR_STORAGE_FILE_RAW; + backingStore->format = VIR_STORAGE_FILE_RAW; else - vol->target.backingStore->format = backingFormat; + backingStore->format = backingFormat; meta->backingStoreRaw = NULL; } diff --git a/src/storage/storage_backend_logical.c b/src/storage/storage_backend_logical.c index 536e617..e7e4e1d 100644 --- a/src/storage/storage_backend_logical.c +++ b/src/storage/storage_backend_logical.c @@ -151,11 +151,11 @@ virStorageBackendLogicalMakeVol(char **const groups, if (VIR_ALLOC(vol->target.backingStore) < 0) goto cleanup; - if (virAsprintf(&vol->target.backingStore->path, "%s/%s", + if (virAsprintf(&virStorageSourceGetBackingStore(&vol->target, 0)->path, "%s/%s", pool->def->target.path, groups[1]) < 0) goto cleanup; - vol->target.backingStore->format = VIR_STORAGE_POOL_LOGICAL_LVM2; + virStorageSourceGetBackingStore(&vol->target, 0)->format = VIR_STORAGE_POOL_LOGICAL_LVM2; } if (!vol->key && VIR_STRDUP(vol->key, groups[2]) < 0) @@ -732,6 +732,7 @@ virStorageBackendLogicalCreateVol(virConnectPtr conn, virErrorPtr err; struct stat sb; bool created = false; + virStorageSourcePtr backingStore; if (vol->target.encryption != NULL) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, @@ -764,8 +765,9 @@ virStorageBackendLogicalCreateVol(virConnectPtr conn, } virCommandAddArgFormat(cmd, "%lluK", VIR_DIV_UP(vol->target.capacity, 1024)); - if (vol->target.backingStore) - virCommandAddArgList(cmd, "-s", vol->target.backingStore->path, NULL); + backingStore = virStorageSourceGetBackingStore(&vol->target, 0); + if (backingStore) + virCommandAddArgList(cmd, "-s", backingStore->path, NULL); else virCommandAddArg(cmd, pool->def->source.name); diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c index 3fad323..cb8e248 100644 --- a/src/util/virstoragefile.c +++ b/src/util/virstoragefile.c @@ -1076,10 +1076,10 @@ virStorageFileChainGetBroken(virStorageSourcePtr chain, if (!chain) return 0; - for (tmp = chain; tmp; tmp = tmp->backingStore) { + for (tmp = chain; tmp; tmp = virStorageSourceGetBackingStore(tmp, 0)) { /* Break when we hit end of chain; report error if we detected * a missing backing file, infinite loop, or other error */ - if (!tmp->backingStore && tmp->backingStoreRaw) { + if (!virStorageSourceGetBackingStore(tmp, 0) && tmp->backingStoreRaw) { if (VIR_STRDUP(*brokenFile, tmp->backingStoreRaw) < 0) return -1; @@ -1334,8 +1334,8 @@ virStorageFileChainLookup(virStorageSourcePtr chain, *parent = NULL; if (startFrom) { - while (chain && chain != startFrom->backingStore) { - chain = chain->backingStore; + while (chain && chain != virStorageSourceGetBackingStore(startFrom, 0)) { + chain = virStorageSourceGetBackingStore(chain, 0); i++; } @@ -1352,7 +1352,7 @@ virStorageFileChainLookup(virStorageSourcePtr chain, while (chain) { if (!name && !idx) { - if (!chain->backingStore) + if (!virStorageSourceGetBackingStore(chain, 0)) break; } else if (idx) { VIR_DEBUG("%zu: %s", i, chain->path); @@ -1387,7 +1387,7 @@ virStorageFileChainLookup(virStorageSourcePtr chain, } } *parent = chain; - chain = chain->backingStore; + chain = virStorageSourceGetBackingStore(chain, 0); i++; } @@ -1891,8 +1891,8 @@ virStorageSourceCopy(const virStorageSource *src, !(ret->auth = virStorageAuthDefCopy(src->auth))) goto error; - if (backingChain && src->backingStore) { - if (!(ret->backingStore = virStorageSourceCopy(src->backingStore, + if (backingChain && virStorageSourceGetBackingStore(src, 0)) { + if (!(ret->backingStore = virStorageSourceCopy(virStorageSourceGetBackingStore(src, 0), true))) goto error; } @@ -2033,7 +2033,7 @@ virStorageSourceBackingStoreClear(virStorageSourcePtr def) VIR_FREE(def->backingStoreRaw); /* recursively free backing chain */ - virStorageSourceFree(def->backingStore); + virStorageSourceFree(virStorageSourceGetBackingStore(def, 0)); def->backingStore = NULL; } @@ -2896,7 +2896,7 @@ virStorageFileGetRelativeBackingPath(virStorageSourcePtr top, *relpath = NULL; - for (next = top; next; next = next->backingStore) { + for (next = top; next; next = virStorageSourceGetBackingStore(next, 0)) { if (!next->relPath) { ret = 1; goto cleanup; diff --git a/tests/virstoragetest.c b/tests/virstoragetest.c index 38ce09e..5bd4637 100644 --- a/tests/virstoragetest.c +++ b/tests/virstoragetest.c @@ -403,7 +403,7 @@ testStorageChain(const void *args) } VIR_FREE(expect); VIR_FREE(actual); - elt = elt->backingStore; + elt = virStorageSourceGetBackingStore(elt, 0); i++; } if (i != data->nfiles) { @@ -1044,8 +1044,8 @@ mymain(void) ret = -1; goto cleanup; } - chain2 = chain->backingStore; - chain3 = chain2->backingStore; + chain2 = virStorageSourceGetBackingStore(chain, 0); + chain3 = virStorageSourceGetBackingStore(chain2, 0); #define TEST_LOOKUP_TARGET(id, target, from, name, index, result, \ meta, parent) \ @@ -1110,8 +1110,8 @@ mymain(void) ret = -1; goto cleanup; } - chain2 = chain->backingStore; - chain3 = chain2->backingStore; + chain2 = virStorageSourceGetBackingStore(chain, 0); + chain3 = virStorageSourceGetBackingStore(chain2, 0); TEST_LOOKUP(28, NULL, "bogus", NULL, NULL, NULL); TEST_LOOKUP(29, chain, "bogus", NULL, NULL, NULL); @@ -1157,8 +1157,8 @@ mymain(void) ret = -1; goto cleanup; } - chain2 = chain->backingStore; - chain3 = chain2->backingStore; + chain2 = virStorageSourceGetBackingStore(chain, 0); + chain3 = virStorageSourceGetBackingStore(chain2, 0); TEST_LOOKUP(56, NULL, "bogus", NULL, NULL, NULL); TEST_LOOKUP(57, NULL, "sub/link2", chain->path, chain, NULL); -- 2.6.1

On Mon, Nov 2, 2015 at 8:42 AM, Peter Krempa <pkrempa(a)redhat.com&gt; wrote: I do it here. Still, you have a good point about temp variables, and long line, I'm working on this now. Thank you for the review.

On Thu, Oct 29, 2015 at 14:43:10 +0100, Matthias Gatto wrote: Again, this needs to do bounds checking once you are passing the size in. This return value is rather unhelpful. If this function is going to reallocate the array, please use the -1/0 return values as usual. Otherwise this function might as well be declared as void, since the caller knows whether 'backingStore' was passed in or not. Peter

The backingStore field was a virStorageSourcePtr. Because a quorum can contain more that one backingStore at the same level, it's now an array of 'virStorageSourcePtr'. This patch rename src->backingStore to src->backingStores, Made the necessary changes to virStorageSourceSetBackingStore and virStorageSourceGetBackingStore. virStorageSourceSetBackingStore can now expand the size of src->backingStores. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/storage/storage_backend.c | 2 +- src/storage/storage_backend_fs.c | 2 +- src/util/virstoragefile.c | 48 +++++++++++++++++++++++++++++++++------- src/util/virstoragefile.h | 3 ++- 4 files changed, 44 insertions(+), 11 deletions(-) diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c index 3b504e9..f6ed91a 100644 --- a/src/storage/storage_backend.c +++ b/src/storage/storage_backend.c @@ -497,7 +497,7 @@ virStorageBackendCreateRaw(virConnectPtr conn ATTRIBUTE_UNUSED, goto cleanup; } - if (vol->target.backingStore) { + if (vol->target.backingStores) { virReportError(VIR_ERR_NO_SUPPORT, "%s", _("backing storage not supported for raw volumes")); goto cleanup; diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c index d065a5f..ef86ecd 100644 --- a/src/storage/storage_backend_fs.c +++ b/src/storage/storage_backend_fs.c @@ -1097,7 +1097,7 @@ static int createFileDir(virConnectPtr conn ATTRIBUTE_UNUSED, return -1; } - if (vol->target.backingStore) { + if (vol->target.backingStores) { virReportError(VIR_ERR_NO_SUPPORT, "%s", _("backing storage not supported for directories volumes")); return -1; diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c index cb96c5b..44bce91 100644 --- a/src/util/virstoragefile.c +++ b/src/util/virstoragefile.c @@ -1809,21 +1809,48 @@ virStorageSourcePoolDefCopy(const virStorageSourcePoolDef *src) } +/** + * virStorageSourceGetBackingStore: + * @src: virStorageSourcePtr containing the backing stores + * @pos: position of the backing store to get + * + * return the backingStore at the position of @pos + */ virStorageSourcePtr -virStorageSourceGetBackingStore(const virStorageSource *src, - size_t pos ATTRIBUTE_UNUSED) +virStorageSourceGetBackingStore(const virStorageSource *src, size_t pos) { - return src->backingStore; + if (!src || !src->backingStores || pos >= src->nBackingStores) + return NULL; + return src->backingStores[pos]; } +/** + * virStorageSourceSetBackingStore: + * @src: virStorageSourcePtr to hold @backingStore + * @backingStore: backingStore to store + * @pos: position of the backing store to store + * + * Set @backingStore at @pos in src->backingStores. + * If src->backingStores don't have the space to contain + * @backingStore, we expand src->backingStores + */ bool virStorageSourceSetBackingStore(virStorageSourcePtr src, virStorageSourcePtr backingStore, - size_t pos ATTRIBUTE_UNUSED) + size_t pos) { - src->backingStore = backingStore; - return !!src->backingStore; + if (!src) + return false; + + if (pos >= src->nBackingStores) { + int nbr = pos - src->nBackingStores + 1; + if (VIR_EXPAND_N(src->backingStores, src->nBackingStores, nbr) < 0) + return false; + } + + src->backingStores[pos] = backingStore; + return true; } @@ -2038,6 +2065,8 @@ virStorageSourceIsEmpty(virStorageSourcePtr src) void virStorageSourceBackingStoreClear(virStorageSourcePtr def) { + size_t i; + if (!def) return; @@ -2045,8 +2074,11 @@ virStorageSourceBackingStoreClear(virStorageSourcePtr def) VIR_FREE(def->backingStoreRaw); /* recursively free backing chain */ - virStorageSourceFree(virStorageSourceGetBackingStore(def, 0)); - virStorageSourceSetBackingStore(def, NULL, 0); + for (i = 0; i < def->nBackingStores; ++i) + virStorageSourceFree(virStorageSourceGetBackingStore(def, i)); + if (def->nBackingStores > 0) + VIR_FREE(def->backingStores); + def->nBackingStores = 0; } diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h index 5c5c29d..5f76b4b 100644 --- a/src/util/virstoragefile.h +++ b/src/util/virstoragefile.h @@ -270,7 +270,8 @@ struct _virStorageSource { bool shared; /* backing chain of the storage source */ - virStorageSourcePtr backingStore; + virStorageSourcePtr *backingStores; + size_t nBackingStores; /* metadata for storage driver access to remote and local volumes */ virStorageDriverDataPtr drv; -- 2.6.1

Add a new function which return true if a virStorageSourcePtr is a RAID. For now, quorum is the only RAID we have. This function is usefull, because, a lot of code access directly to a virStorageSource internal member (like path) with some functions like "virDomainDiskGetSource". This beavious won't work with Quorum, and so we need to add exeptions for these functions, but I'm not convinced by the idea to add a lot of "disk->format == QUORUM" in all the code that deserve exeption for Quorum, so I've add a generic function for this. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/libvirt_private.syms | 1 + src/util/virstoragefile.c | 27 +++++++++++++++++++++++++++ src/util/virstoragefile.h | 2 ++ 3 files changed, 30 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 4aa923a..efcea49 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2168,6 +2168,7 @@ virStorageSourceGetSecurityLabelDef; virStorageSourceInitChainElement; virStorageSourceIsEmpty; virStorageSourceIsLocalStorage; +virStorageSourceIsRAID; virStorageSourceNewFromBacking; virStorageSourceParseRBDColonString; virStorageSourcePoolDefFree; diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c index 44bce91..a9cc0c8 100644 --- a/src/util/virstoragefile.c +++ b/src/util/virstoragefile.c @@ -1808,6 +1808,33 @@ virStorageSourcePoolDefCopy(const virStorageSourcePoolDef *src) return NULL; } +/** + * virStorageSourceIsRAID: + * return true if the backingStores field inside @src is use + * as a child of a contener + */ +bool virStorageSourceIsRAID(virStorageSourcePtr src) +{ + virStorageType type; + + if (!src) + return false; + type = virStorageSourceGetActualType(src); + switch (type) { + case VIR_STORAGE_TYPE_NONE: + case VIR_STORAGE_TYPE_FILE: + case VIR_STORAGE_TYPE_BLOCK: + case VIR_STORAGE_TYPE_DIR: + case VIR_STORAGE_TYPE_NETWORK: + case VIR_STORAGE_TYPE_VOLUME: + case VIR_STORAGE_TYPE_LAST: + return false; + + case VIR_STORAGE_TYPE_QUORUM: + return true; + } + return false; +} /** * virStorageSourceGetBackingStore: diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h index 5f76b4b..c9f2afa 100644 --- a/src/util/virstoragefile.h +++ b/src/util/virstoragefile.h @@ -290,6 +290,8 @@ struct _virStorageSource { # define DEV_BSIZE 512 # endif +bool virStorageSourceIsRAID(virStorageSourcePtr src); + bool virStorageSourceSetBackingStore(virStorageSourcePtr src, virStorageSourcePtr backingStore, size_t pos); -- 2.6.1

Add the capabiltty to libvirt to parse and format the quorum syntax as described here: http://www.redhat.com/archives/libvir-list/2014-May/msg00533.html As explain Peter Krempa in the V5, we need a different index for each child to manipulate individually each child of a quorum, this tack is done in this patch. Sadly this versions is a little buggy: if one day we allow a quorum child to have a backing store, we would be unable to made a difference between a quorum child and a backing store, worst than that, if we have a quorum, with a quorum as a child, we have no way to use the index for quorum child manipulation. For now, this serie of patch forbid all actions which need to use indexes with quorum. Therefore even if the index manipulation is buggy, this should not be a problem because the buggy code should never be call. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/conf/domain_conf.c | 178 ++++++++++++++++++++++++++++++++++--------------- 1 file changed, 126 insertions(+), 52 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index ce8edef..363ef5d 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -6607,20 +6607,56 @@ virDomainDiskSourceParse(xmlNodePtr node, } +static bool +virDomainDiskThresholdParse(virStorageSourcePtr src, + xmlNodePtr node) +{ + char *threshold = virXMLPropString(node, "threshold"); + int ret; + + if (!threshold) { + virReportError(VIR_ERR_XML_ERROR, + "%s", _("missing threshold in quorum")); + return false; + } + ret = virStrToLong_ul(threshold, NULL, 10, &src->threshold); + if (ret < 0 || src->threshold < 2) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("unexpected threshold %s"), + "threshold must be a decimal number superior to 2 " + "and inferior to the number of children"); + VIR_FREE(threshold); + return false; + } + VIR_FREE(threshold); + return true; +} + + static int virDomainDiskBackingStoreParse(xmlXPathContextPtr ctxt, - virStorageSourcePtr src) + virStorageSourcePtr src, + xmlNodePtr node, + size_t pos) { virStorageSourcePtr backingStore = NULL; xmlNodePtr save_ctxt = ctxt->node; - xmlNodePtr source; + xmlNodePtr source = NULL; char *type = NULL; char *format = NULL; int ret = -1; - if (!(ctxt->node = virXPathNode("./backingStore[*]", ctxt))) { - ret = 0; - goto cleanup; + if (virStorageSourceIsRAID(src)) { + if (!node) { + ret = 0; + goto cleanup; + } + ctxt->node = node; + } else { + if (!(ctxt->node = virXPathNode("./backingStore[*]", ctxt))) { + ret = 0; + goto cleanup; + } } if (VIR_ALLOC(backingStore) < 0) @@ -6652,17 +6688,36 @@ virDomainDiskBackingStoreParse(xmlXPathContextPtr ctxt, goto cleanup; } - if (!(source = virXPathNode("./source", ctxt))) { - virReportError(VIR_ERR_XML_ERROR, "%s", - _("missing disk backing store source")); - goto cleanup; - } + if (virStorageSourceIsRAID(backingStore)) { + xmlNodePtr cur = NULL; - if (virDomainDiskSourceParse(source, ctxt, backingStore) < 0 || - virDomainDiskBackingStoreParse(ctxt, backingStore) < 0) - goto cleanup; + if (!virDomainDiskThresholdParse(backingStore, node)) + goto cleanup; - if (!virStorageSourceSetBackingStore(src, backingStore, 0)) + for (cur = node->children; cur != NULL; cur = cur->next) { + if (xmlStrEqual(cur->name, BAD_CAST "backingStore")) { + if ((virDomainDiskBackingStoreParse(ctxt, + backingStore, + cur, + backingStore->nBackingStores) < 0)) { + goto cleanup; + } + } + } + } else { + + if (!(source = virXPathNode("./source", ctxt))) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("missing disk backing store source")); + goto cleanup; + } + + if (virDomainDiskSourceParse(source, ctxt, backingStore) < 0 || + virDomainDiskBackingStoreParse(ctxt, backingStore, NULL, 0) < 0) + goto cleanup; + } + + if (!virStorageSourceSetBackingStore(src, backingStore, pos)) goto cleanup; ret = 0; @@ -7177,6 +7232,10 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt, } } else if (xmlStrEqual(cur->name, BAD_CAST "boot")) { /* boot is parsed as part of virDomainDeviceInfoParseXML */ + } else if (xmlStrEqual(cur->name, BAD_CAST "backingStore")) { + if (virDomainDiskBackingStoreParse(ctxt, def->src, cur, + def->src->nBackingStores) < 0) + goto error; } } cur = cur->next; @@ -7204,12 +7263,19 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt, def->device = VIR_DOMAIN_DISK_DEVICE_DISK; } + if (def->src->type == VIR_STORAGE_TYPE_QUORUM && + !virDomainDiskThresholdParse(def->src, node)) + goto error; + + snapshot = virXMLPropString(node, "snapshot"); + /* Only CDROM and Floppy devices are allowed missing source path * to indicate no media present. LUN is for raw access CD-ROMs * that are not attached to a physical device presently */ if (virStorageSourceIsEmpty(def->src) && (def->device == VIR_DOMAIN_DISK_DEVICE_DISK || - (flags & VIR_DOMAIN_DEF_PARSE_DISK_SOURCE))) { + (flags & VIR_DOMAIN_DEF_PARSE_DISK_SOURCE)) && + !(virStorageSourceIsRAID(def->src))) { virReportError(VIR_ERR_NO_SOURCE, target ? "%s" : NULL, target); goto error; @@ -7552,10 +7618,6 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt, } } - if (!(flags & VIR_DOMAIN_DEF_PARSE_DISK_SOURCE)) { - if (virDomainDiskBackingStoreParse(ctxt, def->src) < 0) - goto error; - } cleanup: VIR_FREE(bus); @@ -18863,12 +18925,14 @@ virDomainDiskSourceFormat(virBufferPtr buf, static int virDomainDiskBackingStoreFormat(virBufferPtr buf, - virStorageSourcePtr backingStore, - const char *backingStoreRaw, + virStorageSourcePtr src, unsigned int idx) { + const char *backingStoreRaw = src->backingStoreRaw; + virStorageSourcePtr backingStore = virStorageSourceGetBackingStore(src, 0); const char *type; const char *format; + size_t i = 0; if (!backingStore) { if (!backingStoreRaw) @@ -18876,37 +18940,44 @@ virDomainDiskBackingStoreFormat(virBufferPtr buf, return 0; } - if (!backingStore->type || - !(type = virStorageTypeToString(backingStore->type))) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("unexpected disk backing store type %d"), - backingStore->type); - return -1; - } + do { + backingStore = virStorageSourceGetBackingStore(src, i); + if (!backingStore->type || + !(type = virStorageTypeToString(backingStore->type))) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("unexpected disk backing store type %d"), + backingStore->type); + return -1; + } - if (backingStore->format <= 0 || - !(format = virStorageFileFormatTypeToString(backingStore->format))) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("unexpected disk backing store format %d"), - backingStore->format); - return -1; - } + if (backingStore->format <= 0 || + !(format = virStorageFileFormatTypeToString(backingStore->format))) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("unexpected disk backing store format %d"), + backingStore->format); + return -1; + } - virBufferAsprintf(buf, "<backingStore type='%s' index='%u'>\n", - type, idx); - virBufferAdjustIndent(buf, 2); + virBufferAsprintf(buf, "<backingStore type='%s' index='%u'", + type, idx); + if (backingStore->threshold) + virBufferAsprintf(buf, " threshold='%lu'", backingStore->threshold); + virBufferAddLit(buf, ">\n"); + virBufferAdjustIndent(buf, 2); - virBufferAsprintf(buf, "<format type='%s'/>\n", format); - /* We currently don't output seclabels for backing chain element */ - if (virDomainDiskSourceFormatInternal(buf, backingStore, 0, 0, true) < 0 || - virDomainDiskBackingStoreFormat(buf, - virStorageSourceGetBackingStore(backingStore, 0), - backingStore->backingStoreRaw, - idx + 1) < 0) - return -1; + virBufferAsprintf(buf, "<format type='%s'/>\n", format); + /* We currently don't output seclabels for backing chain element */ + if (virDomainDiskSourceFormatInternal(buf, backingStore, 0, 0, true) < 0 || + virDomainDiskBackingStoreFormat(buf, + backingStore, + idx + 1) < 0) + return -1; - virBufferAdjustIndent(buf, -2); - virBufferAddLit(buf, "</backingStore>\n"); + virBufferAdjustIndent(buf, -2); + virBufferAddLit(buf, "</backingStore>\n"); + ++i; + ++idx; + } while (i < src->nBackingStores); return 0; } @@ -18976,6 +19047,10 @@ virDomainDiskDefFormat(virBufferPtr buf, def->src->readonly)) virBufferAsprintf(buf, " snapshot='%s'", virDomainSnapshotLocationTypeToString(def->snapshot)); + if (def->src->threshold) { + virBufferAsprintf(buf, " threshold='%lu'", + def->src->threshold); + } virBufferAddLit(buf, ">\n"); virBufferAdjustIndent(buf, 2); @@ -19020,10 +19095,9 @@ virDomainDiskDefFormat(virBufferPtr buf, /* Don't format backingStore to inactive XMLs until the code for * persistent storage of backing chains is ready. */ - if (!(flags & VIR_DOMAIN_DEF_FORMAT_INACTIVE) && - virDomainDiskBackingStoreFormat(buf, - virStorageSourceGetBackingStore(def->src, 0), - def->src->backingStoreRaw, 1) < 0) + if ((!(flags & VIR_DOMAIN_DEF_FORMAT_INACTIVE) || + def->src->type == VIR_STORAGE_TYPE_QUORUM) && + virDomainDiskBackingStoreFormat(buf, def->src, 0) < 0) return -1; virBufferEscapeString(buf, "<backenddomain name='%s'/>\n", def->domain_name); -- 2.6.1

Allow libvirt to build the quorum string used by quemu. Add 2 static functions: qemuBuildRAIDStr and qemuBuildRAIDFileSourceStr. qemuBuildRAIDStr is made because a quorum can have another quorum as a child, so we may need to call qemuBuildRAIDStr recursively. qemuBuildRAIDFileSourceStr was basically made to share the code use to build the source between qemuBuildRAIDStr and qemuBuildDriveStr, but there is some difference betwin the syntax use by libvirt to declare a disk and the one qemu need to build a quorum: a quorum need a syntaxe like: "domaine_name.children.X.file.filename=filename" where libvirt don't use "file.filename=" but directly "file=". Therfore I use this function only for quorum. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/qemu/qemu_command.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 50cf8cc..4ca0011 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3612,6 +3612,93 @@ qemuCheckDiskConfig(virDomainDiskDefPtr disk) return -1; } +static bool +qemuBuildRAIDFileSourceStr(virConnectPtr conn, + virStorageSourcePtr src, + virBuffer *opt, + const char *toAppend) +{ + char *source = NULL; + int actualType = virStorageSourceGetActualType(src); + + if (qemuGetDriveSourceString(src, conn, &source) < 0) + return false; + + if (source) { + virBufferStrcat(opt, ",", toAppend, "filename=", NULL); + + if (actualType == VIR_STORAGE_TYPE_DIR) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("unsupported disk driver type for '%s'"), + virStorageFileFormatTypeToString(src->format)); + return false; + } + virBufferAdd(opt, source, -1); + } + + return true; +} + + +static bool +qemuBuildRAIDStr(virConnectPtr conn, + virDomainDiskDefPtr disk, + virStorageSourcePtr src, + virBuffer *opt, + const char *toAppend) +{ + char *tmp = NULL; + int ret; + virStorageSourcePtr backingStore; + size_t i; + + if (virStorageSourceGetActualType(src) == VIR_STORAGE_TYPE_QUORUM) { + if (!src->threshold) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("threshold missing in the quorum configuration")); + return false; + } + if (src->nBackingStores < 2) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("a quorum must have at last 2 children")); + return false; + } + if (src->threshold > src->nBackingStores) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("threshold must not exceed the number of children")); + return false; + } + virBufferAsprintf(opt, ",%svote-threshold=%lu", + toAppend, src->threshold); + } + + for (i = 0; i < src->nBackingStores; ++i) { + backingStore = virStorageSourceGetBackingStore(src, i); + ret = virAsprintf(&tmp, "%schildren.%lu.file.", toAppend, i); + if (ret < 0) + return false; + + virBufferAsprintf(opt, ",%schildren.%lu.driver=%s", + toAppend, i, + virStorageFileFormatTypeToString(backingStore->format)); + + if (qemuBuildRAIDFileSourceStr(conn, backingStore, opt, tmp) == false) + goto error; + + /* This operation avoid us to made another copy */ + tmp[ret - sizeof("file")] = '\0'; + if (virStorageSourceIsRAID(backingStore)) { + if (!qemuBuildRAIDStr(conn, disk, backingStore, opt, tmp)) + goto error; + } + VIR_FREE(tmp); + } + return true; + error: + VIR_FREE(tmp); + return false; +} + /* Check whether the device address is using either 'ccw' or default s390 * address format and whether that's "legal" for the current qemu and/or @@ -3781,6 +3868,7 @@ qemuBuildDriveStr(virConnectPtr conn, goto error; if (source && + !virStorageSourceIsRAID(disk->src) && !((disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY || disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM) && disk->tray_status == VIR_DOMAIN_DISK_TRAY_OPEN)) { @@ -4132,6 +4220,11 @@ qemuBuildDriveStr(virConnectPtr conn, disk->blkdeviotune.size_iops_sec); } + if (virStorageSourceIsRAID(disk->src)) { + if (!qemuBuildRAIDStr(conn, disk, disk->src, &opt, "")) + goto error; + } + if (virBufferCheckError(&opt) < 0) goto error; -- 2.6.1

This function check if a domain has a RAID as a disk. This function is useful to block snapshot operation on domain which contain quorum. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/conf/domain_conf.c | 13 +++++++++++++ src/conf/domain_conf.h | 1 + src/libvirt_private.syms | 1 + 3 files changed, 15 insertions(+) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 363ef5d..9b947a6 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -2711,6 +2711,19 @@ virDomainDefNewFull(const char *name, } +bool +virDomainDefHasRAID(virDomainDefPtr def) +{ + size_t i; + + for (i = 0; i < def->ndisks; ++i) { + if (virStorageSourceIsRAID(def->disks[i]->src)) + return true; + } + return true; +} + + void virDomainObjAssignDef(virDomainObjPtr domain, virDomainDefPtr def, bool live, diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index fd4ef82..bf768d8 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -2556,6 +2556,7 @@ void virDomainDefClearPCIAddresses(virDomainDefPtr def); void virDomainDefClearCCWAddresses(virDomainDefPtr def); void virDomainDefClearDeviceAliases(virDomainDefPtr def); void virDomainTPMDefFree(virDomainTPMDefPtr def); +bool virDomainDefHasRAID(virDomainDefPtr def); typedef int (*virDomainDeviceInfoCallback)(virDomainDefPtr def, virDomainDeviceDefPtr dev, diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index efcea49..1f5b106 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -218,6 +218,7 @@ virDomainDefGetMemoryInitial; virDomainDefGetSecurityLabelDef; virDomainDefHasDeviceAddress; virDomainDefHasMemoryHotplug; +virDomainDefHasRAID; virDomainDefMaybeAddController; virDomainDefMaybeAddInput; virDomainDefNeedsPlacementAdvice; -- 2.6.1

For now we block all snapshot operations with quorum, because it would require a lot more code, espacially because Qemu doesn't really suport it. I guess, we can use node-name, and manually snapshoot all qcow from a virStorageSource and use this as a quorum's snapshot, but libvirt doesn't support node-name, and we don't need node-name anymore to use a quorum in qemu. I actually have some patchs which could partially support quorum snapshot on my computer, but nothing suitable to be upstream, so I prefer to have a stable versions of quorum inside libvirt before dealling with snapshot. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/qemu/qemu_driver.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 25be0d9..0e43966 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -14674,6 +14674,12 @@ qemuDomainSnapshotCreateXML(virDomainPtr domain, if (!(caps = virQEMUDriverGetCapabilities(driver, false))) goto cleanup; + if (virDomainDefHasRAID(vm->def)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("Snapshot does not support domain with RAID(like quorum) yet")); + goto cleanup; + } + if (qemuProcessAutoDestroyActive(driver, vm)) { virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("domain is marked for auto destroy")); -- 2.6.1

By adding quorum support to qemuDiskPathToAlias, we're adding support to qemuDomainGetBlkioParameters, which was returning an error when the domain was active. Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com&gt; --- src/qemu/qemu_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f70f1dd..50d90b5 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -16115,7 +16115,7 @@ qemuDiskPathToAlias(virDomainObjPtr vm, const char *path, int *idxret) if (idxret) *idxret = idx; - if (virDomainDiskGetSource(disk)) { + if (virDomainDiskGetSource(disk) || virStorageSourceIsRAID(disk->src)) { if (virAsprintf(&ret, "drive-%s", disk->info.alias) < 0) return NULL; } -- 2.6.1