[libvirt] [PATCH v2 18/32] util: Use VIR_AUTOFREE for virstoragefile
John Ferlan
jferlan at redhat.com
Fri Feb 8 18:37:12 UTC 2019
Let's make use of the auto __cleanup capabilities cleaning up any
now unnecessary goto paths.
Signed-off-by: John Ferlan <jferlan at redhat.com>
Reviewed-by: Erik Skultety <eskultet at redhat.com>
---
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
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