[libvirt] [PATCH] lib: Use more of VIR_STEAL_PTR()

From: Your Name <you(a)example.com&gt; We have this very handy macro called VIR_STEAL_PTR() which steals one pointer into the other and sets the other to NULL. The following coccinelle patch was used to create this commit: @ rule1 @ identifier a, b; @@ - b = a; ... - a = NULL; + VIR_STEAL_PTR(b, a); Some places were clean up afterwards to make syntax-check happy (e.g. some curly braces were removed where the body become a one liner). Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/conf/domain_addr.c | 6 ++---- src/conf/domain_conf.c | 21 +++++++-------------- src/conf/secret_conf.c | 3 +-- src/conf/storage_conf.c | 3 +-- src/conf/virnetworkobj.c | 3 +-- src/conf/virsecretobj.c | 3 +-- src/libvirt-domain.c | 12 ++++-------- src/phyp/phyp_driver.c | 3 +-- src/qemu/qemu_domain.c | 6 ++---- src/qemu/qemu_driver.c | 12 ++++-------- src/qemu/qemu_migration.c | 12 ++++-------- src/security/virt-aa-helper.c | 3 +-- src/storage/storage_driver.c | 6 ++---- src/test/test_driver.c | 3 +-- src/util/virdbus.c | 18 ++++++------------ src/util/virrotatingfile.c | 3 +-- src/util/virstoragefile.c | 6 ++---- src/vz/vz_driver.c | 14 ++++---------- src/vz/vz_sdk.c | 6 ++---- tests/networkxml2conftest.c | 3 +-- tools/virsh-domain.c | 3 +-- tools/virsh-snapshot.c | 3 +-- 22 files changed, 50 insertions(+), 102 deletions(-) diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c index 618fce44f0..04c4e6d7e1 100644 --- a/src/conf/domain_addr.c +++ b/src/conf/domain_addr.c @@ -1757,8 +1757,7 @@ virDomainVirtioSerialAddrSetCreateFromDomain(virDomainDefPtr def) addrs) < 0) goto cleanup; - ret = addrs; - addrs = NULL; + VIR_STEAL_PTR(ret, addrs); cleanup: virDomainVirtioSerialAddrSetFree(addrs); return ret; @@ -2095,8 +2094,7 @@ virDomainUSBAddressHubNew(size_t nports) goto cleanup; hub->nports = nports; - ret = hub; - hub = NULL; + VIR_STEAL_PTR(ret, hub); cleanup: virDomainUSBAddressHubFree(hub); return ret; diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 22979e6c4e..9409d93c23 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -7900,8 +7900,7 @@ virDomainNetIPParseXML(xmlNodePtr node) goto cleanup; } - ret = ip; - ip = NULL; + VIR_STEAL_PTR(ret, ip); cleanup: VIR_FREE(prefixStr); @@ -13482,10 +13481,8 @@ virDomainGraphicsListenDefParseXML(virDomainGraphicsListenDefPtr def, goto error; } - if (!address) { - address = addressCompat; - addressCompat = NULL; - } + if (!address) + VIR_STEAL_PTR(address, addressCompat); } if (def->type == VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_SOCKET) { @@ -13497,10 +13494,8 @@ virDomainGraphicsListenDefParseXML(virDomainGraphicsListenDefPtr def, goto error; } - if (!socketPath) { - socketPath = socketCompat; - socketCompat = NULL; - } + if (!socketPath) + VIR_STEAL_PTR(socketPath, socketCompat); } if (address && address[0] && @@ -14747,8 +14742,7 @@ virDomainShmemDefParseXML(virDomainXMLOptionPtr xmlopt, goto cleanup; - ret = def; - def = NULL; + VIR_STEAL_PTR(ret, def); cleanup: ctxt->node = save; VIR_FREE(tmp); @@ -16187,8 +16181,7 @@ virDomainIOMMUDefParseXML(xmlNodePtr node, } } - ret = iommu; - iommu = NULL; + VIR_STEAL_PTR(ret, iommu); cleanup: ctxt->node = save; diff --git a/src/conf/secret_conf.c b/src/conf/secret_conf.c index 3a5aa72563..ca6cc194a2 100644 --- a/src/conf/secret_conf.c +++ b/src/conf/secret_conf.c @@ -193,8 +193,7 @@ secretXMLParseNode(xmlDocPtr xml, xmlNodePtr root) if (virXPathNode("./usage", ctxt) != NULL && virSecretDefParseUsage(ctxt, def) < 0) goto cleanup; - ret = def; - def = NULL; + VIR_STEAL_PTR(ret, def); cleanup: VIR_FREE(prop); diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c index 55db7a96f5..ba5b1f1783 100644 --- a/src/conf/storage_conf.c +++ b/src/conf/storage_conf.c @@ -587,8 +587,7 @@ virStoragePoolDefParseSourceString(const char *srcSpec, node) < 0) goto cleanup; - ret = def; - def = NULL; + VIR_STEAL_PTR(ret, def); cleanup: virStoragePoolSourceFree(def); xmlFreeDoc(doc); diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index e6b01388f5..3749dda751 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -602,8 +602,7 @@ virNetworkObjAssignDefLocked(virNetworkObjListPtr nets, obj->persistent = !(flags & VIR_NETWORK_OBJ_LIST_ADD_LIVE); } - ret = obj; - obj = NULL; + VIR_STEAL_PTR(ret, obj); cleanup: virNetworkObjEndAPI(&obj); diff --git a/src/conf/virsecretobj.c b/src/conf/virsecretobj.c index 78911c0908..c4e7b06eca 100644 --- a/src/conf/virsecretobj.c +++ b/src/conf/virsecretobj.c @@ -394,8 +394,7 @@ virSecretObjListAdd(virSecretObjListPtr secrets, virObjectRef(obj); } - ret = obj; - obj = NULL; + VIR_STEAL_PTR(ret, obj); cleanup: virSecretObjEndAPI(&obj); diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c index 75c9014c0e..d919a44803 100644 --- a/src/libvirt-domain.c +++ b/src/libvirt-domain.c @@ -3046,9 +3046,8 @@ virDomainMigrateVersion3Full(virDomainPtr domain, VIR_MIGRATE_AUTO_CONVERGE); VIR_DEBUG("Prepare3 %p flags=0x%x", dconn, destflags); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (useParams) { if (virTypedParamsReplaceString(&params, &nparams, @@ -3111,9 +3110,8 @@ virDomainMigrateVersion3Full(virDomainPtr domain, */ VIR_DEBUG("Perform3 %p uri=%s", domain->conn, uri); VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; /* dconnuri not relevant in non-P2P modes, so left NULL here */ if (useParams) { @@ -3150,9 +3148,8 @@ virDomainMigrateVersion3Full(virDomainPtr domain, */ VIR_DEBUG("Finish3 %p ret=%d", dconn, ret); VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (useParams) { if (virTypedParamsGetString(params, nparams, @@ -3227,9 +3224,8 @@ virDomainMigrateVersion3Full(virDomainPtr domain, if (notify_source) { VIR_DEBUG("Confirm3 %p ret=%d domain=%p", domain->conn, ret, domain); VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (useParams) { ret = domain->conn->driver->domainMigrateConfirm3Params diff --git a/src/phyp/phyp_driver.c b/src/phyp/phyp_driver.c index 4acc6ce734..4ffa08ff43 100644 --- a/src/phyp/phyp_driver.c +++ b/src/phyp/phyp_driver.c @@ -1468,8 +1468,7 @@ phypGetBackingDevice(virConnectPtr conn, const char *managed_system, if (VIR_STRDUP(backing_device, char_ptr) < 0) goto cleanup; } else { - backing_device = ret; - ret = NULL; + VIR_STEAL_PTR(backing_device, ret); } char_ptr = strchr(backing_device, '\n'); diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index f42903a343..6eeabe0df1 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -11645,8 +11645,7 @@ qemuDomainCreateDeviceRecursive(const char *device, } VIR_FREE(devTmp); VIR_FREE(target); - target = tmp; - tmp = NULL; + VIR_STEAL_PTR(target, tmp); } if (qemuDomainCreateDeviceRecursive(target, data, @@ -12601,8 +12600,7 @@ qemuDomainAttachDeviceMknodRecursive(virQEMUDriverPtr driver, } VIR_FREE(fileTmp); VIR_FREE(target); - target = tmp; - tmp = NULL; + VIR_STEAL_PTR(target, tmp); } data.target = target; diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 2d8e4618bd..5387150bbd 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6655,11 +6655,9 @@ qemuDomainSaveImageUpdateDef(virQEMUDriverPtr driver, virFreeError(err); /* use the user provided XML */ - ret = newdef; - newdef = NULL; + VIR_STEAL_PTR(ret, newdef); } else { - ret = newdef_migr; - newdef_migr = NULL; + VIR_STEAL_PTR(ret, newdef_migr); } cleanup: @@ -12705,10 +12703,8 @@ qemuDomainMigratePerform(virDomainPtr dom, goto cleanup; } - if (flags & VIR_MIGRATE_PEER2PEER) { - dconnuri = uri; - uri = NULL; - } + if (flags & VIR_MIGRATE_PEER2PEER) + VIR_STEAL_PTR(dconnuri, uri); /* Do not output cookies in v2 protocol, since the cookie * length was not sufficiently large, causing failures diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 950d9cd615..6c66ff6648 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -4170,9 +4170,8 @@ qemuMigrationSrcPerformPeer2Peer3(virQEMUDriverPtr driver, VIR_MIGRATE_AUTO_CONVERGE); VIR_DEBUG("Prepare3 %p", dconn); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (flags & VIR_MIGRATE_TUNNELLED) { if (!(st = virStreamNew(dconn, 0))) @@ -4239,9 +4238,8 @@ qemuMigrationSrcPerformPeer2Peer3(virQEMUDriverPtr driver, VIR_DEBUG("Perform3 %p uri=%s", sconn, NULLSTR(uri)); qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_PERFORM3); VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (flags & VIR_MIGRATE_TUNNELLED) { ret = qemuMigrationSrcPerformTunnel(driver, vm, st, persist_xml, @@ -4281,9 +4279,8 @@ qemuMigrationSrcPerformPeer2Peer3(virQEMUDriverPtr driver, */ VIR_DEBUG("Finish3 %p ret=%d", dconn, ret); VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (useParams) { @@ -4362,9 +4359,8 @@ qemuMigrationSrcPerformPeer2Peer3(virQEMUDriverPtr driver, */ VIR_DEBUG("Confirm3 %p cancelled=%d vm=%p", sconn, cancelled, vm); VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; ret = qemuMigrationSrcConfirmPhase(driver, vm, cookiein, cookieinlen, diff --git a/src/security/virt-aa-helper.c b/src/security/virt-aa-helper.c index 56d7cfadf1..8e22e9978a 100644 --- a/src/security/virt-aa-helper.c +++ b/src/security/virt-aa-helper.c @@ -355,8 +355,7 @@ create_profile(const char *profile, const char *profile_name, if (!(tmp = virStringReplace(pcontent, template_end, replace_files))) goto clean_all; VIR_FREE(pcontent); - pcontent = tmp; - tmp = NULL; + VIR_STEAL_PTR(pcontent, tmp); } /* write the file */ diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c index 4a13e90481..878a40cac5 100644 --- a/src/storage/storage_driver.c +++ b/src/storage/storage_driver.c @@ -1936,8 +1936,7 @@ storageVolCreateXML(virStoragePoolPtr pool, VIR_INFO("Creating volume '%s' in storage pool '%s'", newvol->name, def->name); - vol = newvol; - newvol = NULL; + VIR_STEAL_PTR(vol, newvol); voldef = NULL; cleanup: @@ -2130,8 +2129,7 @@ storageVolCreateXMLFrom(virStoragePoolPtr pool, VIR_INFO("Creating volume '%s' in storage pool '%s'", newvol->name, def->name); - vol = newvol; - newvol = NULL; + VIR_STEAL_PTR(vol, newvol); voldef = NULL; cleanup: diff --git a/src/test/test_driver.c b/src/test/test_driver.c index 1d81772a46..568c52aa28 100644 --- a/src/test/test_driver.c +++ b/src/test/test_driver.c @@ -5595,8 +5595,7 @@ testNodeDeviceCreateXML(virConnectPtr conn, if (VIR_STRDUP(dev->parentName, def->parent) < 0) goto cleanup; - ret = dev; - dev = NULL; + VIR_STEAL_PTR(ret, dev); cleanup: virNodeDeviceObjEndAPI(&obj); diff --git a/src/util/virdbus.c b/src/util/virdbus.c index 691f182387..6725e0edb0 100644 --- a/src/util/virdbus.c +++ b/src/util/virdbus.c @@ -762,8 +762,7 @@ virDBusMessageIterEncode(DBusMessageIter *rootiter, goto cleanup; } VIR_FREE(contsig); - iter = newiter; - newiter = NULL; + VIR_STEAL_PTR(iter, newiter); types = t + 1; nstruct = skiplen; narray = (size_t)va_arg(args, int); @@ -789,8 +788,7 @@ virDBusMessageIterEncode(DBusMessageIter *rootiter, VIR_FREE(newiter); goto cleanup; } - iter = newiter; - newiter = NULL; + VIR_STEAL_PTR(iter, newiter); types = vsig; nstruct = strlen(types); narray = (size_t)-1; @@ -821,8 +819,7 @@ virDBusMessageIterEncode(DBusMessageIter *rootiter, goto cleanup; } VIR_FREE(contsig); - iter = newiter; - newiter = NULL; + VIR_STEAL_PTR(iter, newiter); types = t + 1; nstruct = skiplen - 2; narray = (size_t)-1; @@ -1059,8 +1056,7 @@ virDBusMessageIterDecode(DBusMessageIter *rootiter, nstruct, narray) < 0) goto cleanup; VIR_FREE(contsig); - iter = newiter; - newiter = NULL; + VIR_STEAL_PTR(iter, newiter); types = t + 1; nstruct = skiplen; if (arrayref) { @@ -1090,8 +1086,7 @@ virDBusMessageIterDecode(DBusMessageIter *rootiter, VIR_DEBUG("Push failed"); goto cleanup; } - iter = newiter; - newiter = NULL; + VIR_STEAL_PTR(iter, newiter); types = vsig; nstruct = strlen(types); narray = (size_t)-1; @@ -1118,8 +1113,7 @@ virDBusMessageIterDecode(DBusMessageIter *rootiter, nstruct, narray) < 0) goto cleanup; VIR_FREE(contsig); - iter = newiter; - newiter = NULL; + VIR_STEAL_PTR(iter, newiter); types = t + 1; nstruct = skiplen - 2; narray = (size_t)-1; diff --git a/src/util/virrotatingfile.c b/src/util/virrotatingfile.c index d7dc3bd1ce..7a268319a6 100644 --- a/src/util/virrotatingfile.c +++ b/src/util/virrotatingfile.c @@ -406,8 +406,7 @@ virRotatingFileWriterRollover(virRotatingFileWriterPtr file) } VIR_FREE(nextpath); - nextpath = thispath; - thispath = NULL; + VIR_STEAL_PTR(nextpath, thispath); } } diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c index bd4b0274df..70fe551e5f 100644 --- a/src/util/virstoragefile.c +++ b/src/util/virstoragefile.c @@ -1233,8 +1233,7 @@ virStorageFileGetMetadataFromFD(const char *path, * update the metadata.*/ meta->type = VIR_STORAGE_TYPE_DIR; meta->format = VIR_STORAGE_FILE_DIR; - ret = meta; - meta = NULL; + VIR_STEAL_PTR(ret, meta); goto cleanup; } @@ -1256,8 +1255,7 @@ virStorageFileGetMetadataFromFD(const char *path, else if (S_ISBLK(sb.st_mode)) meta->type = VIR_STORAGE_TYPE_BLOCK; - ret = meta; - meta = NULL; + VIR_STEAL_PTR(ret, meta); cleanup: virStorageSourceFree(meta); diff --git a/src/vz/vz_driver.c b/src/vz/vz_driver.c index 7e9ef932dc..e86a788b09 100644 --- a/src/vz/vz_driver.c +++ b/src/vz/vz_driver.c @@ -182,12 +182,8 @@ vzDestroyDriverConnection(void) vzConnPtr privconn_list; virMutexLock(&vz_driver_lock); - driver = vz_driver; - vz_driver = NULL; - - privconn_list = vz_conn_list; - vz_conn_list = NULL; - + VIR_STEAL_PTR(driver, vz_driver); + VIR_STEAL_PTR(privconn_list, vz_conn_list); virMutexUnlock(&vz_driver_lock); while (privconn_list) { @@ -3203,9 +3199,8 @@ vzDomainMigratePerformP2P(virDomainObjPtr dom, VIR_MIGRATE_PARAM_DEST_XML, dom_xml) < 0) goto done; - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; virObjectUnlock(dom); ret = dconn->driver->domainMigratePrepare3Params @@ -3226,9 +3221,8 @@ vzDomainMigratePerformP2P(virDomainObjPtr dom, } VIR_FREE(cookiein); - cookiein = cookieout; cookieinlen = cookieoutlen; - cookieout = NULL; + VIR_STEAL_PTR(cookiein, cookieout); cookieoutlen = 0; if (vzDomainMigratePerformStep(dom, driver, params, nparams, cookiein, cookieinlen, flags) < 0) { diff --git a/src/vz/vz_sdk.c b/src/vz/vz_sdk.c index 63d013deac..b9fd03c0d2 100644 --- a/src/vz/vz_sdk.c +++ b/src/vz/vz_sdk.c @@ -928,8 +928,7 @@ prlsdkParseNetAddress(char *addr) goto cleanup; ip->prefix = nbits; - ret = ip; - ip = NULL; + VIR_STEAL_PTR(ret, ip); cleanup: if (!ret) @@ -4768,8 +4767,7 @@ prlsdkParseSnapshotTree(const char *treexml) goto cleanup; } - ret = snapshots; - snapshots = NULL; + VIR_STEAL_PTR(ret, snapshots); cleanup: virDomainSnapshotObjListFree(snapshots); diff --git a/tests/networkxml2conftest.c b/tests/networkxml2conftest.c index 367e30b994..c362149c29 100644 --- a/tests/networkxml2conftest.c +++ b/tests/networkxml2conftest.c @@ -51,8 +51,7 @@ testCompareXMLToConfFiles(const char *inxml, const char *outconf, dnsmasqCapsPtr "except-interface=lo\n"))) goto fail; VIR_FREE(actual); - actual = tmp; - tmp = NULL; + VIR_STEAL_PTR(actual, tmp); #endif if (virTestCompareToFile(actual, outconf) < 0) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index e63fc028b9..34f9e6b5c6 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -8423,8 +8423,7 @@ cmdDesc(vshControl *ctl, const vshCmd *cmd) } VIR_FREE(desc); - desc = desc_edited; - desc_edited = NULL; + VIR_STEAL_PTR(desc, desc_edited); } if (virDomainSetMetadata(dom, type, desc, NULL, NULL, flags) < 0) { diff --git a/tools/virsh-snapshot.c b/tools/virsh-snapshot.c index e3d4cda0fc..6d8e2b299b 100644 --- a/tools/virsh-snapshot.c +++ b/tools/virsh-snapshot.c @@ -1356,8 +1356,7 @@ virshSnapshotListCollect(vshControl *ctl, virDomainPtr dom, virshSnapSorter); snaplist->nsnaps -= deleted; - ret = snaplist; - snaplist = NULL; + VIR_STEAL_PTR(ret, snaplist); cleanup: virshSnapshotListFree(snaplist); -- 2.19.2