[libvirt] [PATCH v2 18/32] util: Use VIR_AUTOFREE for virstoragefile

Let's make use of the auto __cleanup capabilities cleaning up any now unnecessary goto paths. Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; Reviewed-by: Erik Skultety <eskultet(a)redhat.com&gt; --- src/util/virstoragefile.c | 128 ++++++++++++++------------------------ 1 file changed, 46 insertions(+), 82 deletions(-) diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c index c6425308fb..fddfea65db 100644 --- a/src/util/virstoragefile.c +++ b/src/util/virstoragefile.c @@ -595,9 +595,10 @@ vmdk4GetBackingStore(char **res, size_t buf_size) { static const char prefix[] = "parentFileNameHint=\""; - char *desc, *start, *end; + char *start, *end; size_t len; int ret = BACKING_STORE_ERROR; + VIR_AUTOFREE(char *) desc = NULL; if (VIR_ALLOC_N(desc, VIR_STORAGE_MAX_HEADER) < 0) goto cleanup; @@ -645,7 +646,6 @@ vmdk4GetBackingStore(char **res, ret = BACKING_STORE_OK; cleanup: - VIR_FREE(desc); return ret; } @@ -1084,7 +1084,7 @@ virStorageFileProbeFormat(const char *path, uid_t uid, gid_t gid) int ret = -1; struct stat sb; ssize_t len = VIR_STORAGE_MAX_HEADER; - char *header = NULL; + VIR_AUTOFREE(char *) header = NULL; if ((fd = virFileOpenAs(path, O_RDONLY, 0, uid, gid, 0)) < 0) { virReportSystemError(-fd, _("Failed to open file '%s'"), path); @@ -1115,7 +1115,6 @@ virStorageFileProbeFormat(const char *path, uid_t uid, gid_t gid) ret = virStorageFileProbeFormatFromBuf(path, header, len); cleanup: - VIR_FREE(header); VIR_FORCE_CLOSE(fd); return ret; @@ -1215,10 +1214,10 @@ virStorageFileGetMetadataFromFD(const char *path, { virStorageSourcePtr ret = NULL; virStorageSourcePtr meta = NULL; - char *buf = NULL; ssize_t len = VIR_STORAGE_MAX_HEADER; struct stat sb; int dummy; + VIR_AUTOFREE(char *) buf = NULL; if (!backingFormat) backingFormat = &dummy; @@ -1265,7 +1264,6 @@ virStorageFileGetMetadataFromFD(const char *path, cleanup: virStorageSourceFree(meta); - VIR_FREE(buf); return ret; } @@ -1614,8 +1612,7 @@ virStorageFileParseChainIndex(const char *diskTarget, unsigned int *chainIndex) { unsigned int idx = 0; - char *target = NULL; - int ret = 0; + VIR_AUTOFREE(char *) target = NULL; *chainIndex = 0; @@ -1626,21 +1623,18 @@ virStorageFileParseChainIndex(const char *diskTarget, return 0; if (idx == 0) - goto cleanup; + return 0; if (STRNEQ(diskTarget, target)) { virReportError(VIR_ERR_INVALID_ARG, _("requested target '%s' does not match target '%s'"), target, diskTarget); - ret = -1; - goto cleanup; + return -1; } *chainIndex = idx; - cleanup: - VIR_FREE(target); - return ret; + return 0; } @@ -1891,8 +1885,8 @@ virStorageAuthDefParse(xmlNodePtr node, xmlNodePtr saveNode = ctxt->node; virStorageAuthDefPtr ret = NULL; xmlNodePtr secretnode = NULL; - char *authtype = NULL; VIR_AUTOPTR(virStorageAuthDef) authdef = NULL; + VIR_AUTOFREE(char *) authtype = NULL; ctxt->node = node; @@ -1939,7 +1933,6 @@ virStorageAuthDefParse(xmlNodePtr node, VIR_STEAL_PTR(ret, authdef); cleanup: - VIR_FREE(authtype); ctxt->node = saveNode; return ret; @@ -1983,10 +1976,10 @@ virStoragePRDefParseXML(xmlXPathContextPtr ctxt) { virStoragePRDefPtr prd; virStoragePRDefPtr ret = NULL; - char *managed = NULL; - char *type = NULL; - char *path = NULL; - char *mode = NULL; + VIR_AUTOFREE(char *) managed = NULL; + VIR_AUTOFREE(char *) type = NULL; + VIR_AUTOFREE(char *) path = NULL; + VIR_AUTOFREE(char *) mode = NULL; if (VIR_ALLOC(prd) < 0) return NULL; @@ -2045,10 +2038,6 @@ virStoragePRDefParseXML(xmlXPathContextPtr ctxt) VIR_STEAL_PTR(ret, prd); cleanup: - VIR_FREE(mode); - VIR_FREE(path); - VIR_FREE(type); - VIR_FREE(managed); virStoragePRDefFree(prd); return ret; } @@ -2601,8 +2590,8 @@ static virStorageSourcePtr virStorageSourceNewFromBackingRelative(virStorageSourcePtr parent, const char *rel) { - char *dirname = NULL; virStorageSourcePtr ret; + VIR_AUTOFREE(char *) dirname = NULL; if (VIR_ALLOC(ret) < 0) return NULL; @@ -2645,7 +2634,6 @@ virStorageSourceNewFromBackingRelative(virStorageSourcePtr parent, } cleanup: - VIR_FREE(dirname); return ret; error: @@ -2809,8 +2797,8 @@ int virStorageSourceParseRBDColonString(const char *rbdstr, virStorageSourcePtr src) { - char *options = NULL; char *p, *e, *next; + VIR_AUTOFREE(char *) options = NULL; VIR_AUTOPTR(virStorageAuthDef) authdef = NULL; /* optionally skip the "rbd:" prefix if provided */ @@ -2818,19 +2806,19 @@ virStorageSourceParseRBDColonString(const char *rbdstr, rbdstr += strlen("rbd:"); if (VIR_STRDUP(src->path, rbdstr) < 0) - goto error; + return -1; p = strchr(src->path, ':'); if (p) { if (VIR_STRDUP(options, p + 1) < 0) - goto error; + return -1; *p = '\0'; } /* snapshot name */ if ((p = strchr(src->path, '@'))) { if (VIR_STRDUP(src->snapshot, p + 1) < 0) - goto error; + return -1; *p = '\0'; } @@ -2838,7 +2826,7 @@ virStorageSourceParseRBDColonString(const char *rbdstr, if ((p = strchr(src->path, '/'))) { VIR_STEAL_PTR(src->volume, src->path); if (VIR_STRDUP(src->path, p + 1) < 0) - goto error; + return -1; *p = '\0'; } @@ -2866,14 +2854,14 @@ virStorageSourceParseRBDColonString(const char *rbdstr, if (STRPREFIX(p, "id=")) { /* formulate authdef for src->auth */ if (VIR_ALLOC(authdef) < 0) - goto error; + return -1; if (VIR_STRDUP(authdef->username, p + strlen("id=")) < 0) - goto error; + return -1; if (VIR_STRDUP(authdef->secrettype, virSecretUsageTypeToString(VIR_SECRET_USAGE_TYPE_CEPH)) < 0) - goto error; + return -1; VIR_STEAL_PTR(src->auth, authdef); src->authInherited = true; @@ -2897,7 +2885,7 @@ virStorageSourceParseRBDColonString(const char *rbdstr, } if (virStorageSourceRBDAddHost(src, h) < 0) - goto error; + return -1; h = sep; } @@ -2905,16 +2893,11 @@ virStorageSourceParseRBDColonString(const char *rbdstr, if (STRPREFIX(p, "conf=") && VIR_STRDUP(src->configFile, p + strlen("conf=")) < 0) - goto error; + return -1; p = next; } - VIR_FREE(options); return 0; - - error: - VIR_FREE(options); - return -1; } @@ -2983,36 +2966,35 @@ static int virStorageSourceParseBackingColon(virStorageSourcePtr src, const char *path) { - char *protocol = NULL; const char *p; - int ret = -1; + VIR_AUTOFREE(char *) protocol = NULL; if (!(p = strchr(path, ':'))) { virReportError(VIR_ERR_INTERNAL_ERROR, _("invalid backing protocol string '%s'"), path); - goto cleanup; + return -1; } if (VIR_STRNDUP(protocol, path, p - path) < 0) - goto cleanup; + return -1; if ((src->protocol = virStorageNetProtocolTypeFromString(protocol)) < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("invalid backing protocol '%s'"), protocol); - goto cleanup; + return -1; } switch ((virStorageNetProtocol) src->protocol) { case VIR_STORAGE_NET_PROTOCOL_NBD: if (virStorageSourceParseNBDColonString(path, src) < 0) - goto cleanup; + return -1; break; case VIR_STORAGE_NET_PROTOCOL_RBD: if (virStorageSourceParseRBDColonString(path, src) < 0) - goto cleanup; + return -1; break; case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG: @@ -3021,7 +3003,7 @@ virStorageSourceParseBackingColon(virStorageSourcePtr src, virReportError(VIR_ERR_INTERNAL_ERROR, _("backing store parser is not implemented for protocol %s"), protocol); - goto cleanup; + return -1; case VIR_STORAGE_NET_PROTOCOL_HTTP: case VIR_STORAGE_NET_PROTOCOL_HTTPS: @@ -3035,14 +3017,10 @@ virStorageSourceParseBackingColon(virStorageSourcePtr src, virReportError(VIR_ERR_INTERNAL_ERROR, _("malformed backing store path for protocol %s"), protocol); - goto cleanup; + return -1; } - ret = 0; - - cleanup: - VIR_FREE(protocol); - return ret; + return 0; } @@ -3593,9 +3571,9 @@ virStorageSourceParseBackingJSONInternal(virStorageSourcePtr src, virJSONValuePtr deflattened = NULL; virJSONValuePtr file; const char *drvname; - char *str = NULL; size_t i; int ret = -1; + VIR_AUTOFREE(char *) str = NULL; if (!(deflattened = virJSONValueObjectDeflatten(json))) goto cleanup; @@ -3628,7 +3606,6 @@ virStorageSourceParseBackingJSONInternal(virStorageSourcePtr src, "driver '%s'"), drvname); cleanup: - VIR_FREE(str); virJSONValueFree(deflattened); return ret; } @@ -3997,12 +3974,12 @@ virStorageFileCanonicalizePath(const char *path, bool beginDoubleSlash = false; char **components = NULL; size_t ncomponents = 0; - char *linkpath = NULL; - char *currentpath = NULL; size_t i = 0; size_t j = 0; int rc; char *ret = NULL; + VIR_AUTOFREE(char *) linkpath = NULL; + VIR_AUTOFREE(char *) currentpath = NULL; if (path[0] == '/') { beginSlash = true; @@ -4131,8 +4108,6 @@ virStorageFileCanonicalizePath(const char *path, cleanup: virHashFree(cycle); virStringListFreeCount(components, ncomponents); - VIR_FREE(linkpath); - VIR_FREE(currentpath); return ret; } @@ -4175,25 +4150,22 @@ virStorageFileGetRelativeBackingPath(virStorageSourcePtr top, char **relpath) { virStorageSourcePtr next; - char *tmp = NULL; - char *path = NULL; - char ret = -1; + VIR_AUTOFREE(char *) tmp = NULL; + VIR_AUTOFREE(char *) path = NULL; *relpath = NULL; for (next = top; virStorageSourceIsBacking(next); next = next->backingStore) { - if (!next->relPath) { - ret = 1; - goto cleanup; - } + if (!next->relPath) + return 1; if (!(tmp = virStorageFileRemoveLastPathComponent(path))) - goto cleanup; + return -1; VIR_FREE(path); if (virAsprintf(&path, "%s%s", tmp, next->relPath) < 0) - goto cleanup; + return -1; VIR_FREE(tmp); @@ -4205,17 +4177,11 @@ virStorageFileGetRelativeBackingPath(virStorageSourcePtr top, virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("failed to resolve relative backing name: " "base image is not in backing chain")); - goto cleanup; + return -1; } VIR_STEAL_PTR(*relpath, path); - - ret = 0; - - cleanup: - VIR_FREE(path); - VIR_FREE(tmp); - return ret; + return 0; } @@ -4866,11 +4832,11 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src, { int ret = -1; const char *uniqueName; - char *buf = NULL; ssize_t headerLen; virStorageSourcePtr backingStore = NULL; int backingFormat; int rv; + VIR_AUTOFREE(char *) buf = NULL; VIR_DEBUG("path=%s format=%d uid=%u gid=%u", src->path, src->format, @@ -4952,7 +4918,6 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src, cleanup: if (virStorageSourceHasBacking(src)) src->backingStore->id = depth; - VIR_FREE(buf); virStorageFileDeinit(src); virStorageSourceFree(backingStore); return ret; @@ -5024,10 +4989,10 @@ virStorageFileGetBackingStoreStr(virStorageSourcePtr src, char **backing) { virStorageSourcePtr tmp = NULL; - char *buf = NULL; ssize_t headerLen; int ret = -1; int rv; + VIR_AUTOFREE(char *) buf = NULL; *backing = NULL; @@ -5061,7 +5026,6 @@ virStorageFileGetBackingStoreStr(virStorageSourcePtr src, ret = 0; cleanup: - VIR_FREE(buf); virStorageSourceFree(tmp); return ret; -- 2.20.1