[libvirt] [PATCH v2 21/41] util: pci: use VIR_AUTOPTR for aggregate types
Sukrit Bhatnagar
skrtbhtngr at gmail.com
Tue Jul 24 15:52:22 UTC 2018
By making use of GNU C's cleanup attribute handled by the
VIR_AUTOPTR macro for declaring aggregate pointer variables,
majority of the calls to *Free functions can be dropped, which
in turn leads to getting rid of most of our cleanup sections.
Signed-off-by: Sukrit Bhatnagar <skrtbhtngr at gmail.com>
---
src/util/virpci.c | 78 +++++++++++++++++++++----------------------------------
1 file changed, 29 insertions(+), 49 deletions(-)
diff --git a/src/util/virpci.c b/src/util/virpci.c
index 1b3e52f..634df8d 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -490,8 +490,6 @@ virPCIDeviceIterDevices(virPCIDeviceIterPredicate predicate,
ret = 1;
break;
}
-
- virPCIDeviceFree(check);
}
VIR_DIR_CLOSE(dir);
return ret;
@@ -781,7 +779,8 @@ virPCIDeviceTrySecondaryBusReset(virPCIDevicePtr dev,
int cfgfd,
virPCIDeviceList *inactiveDevs)
{
- virPCIDevicePtr parent, conflict;
+ VIR_AUTOPTR(virPCIDevice) parent = NULL;
+ VIR_AUTOPTR(virPCIDevice) conflict = NULL;
uint8_t config_space[PCI_CONF_LEN];
uint16_t ctl;
int ret = -1;
@@ -795,7 +794,6 @@ virPCIDeviceTrySecondaryBusReset(virPCIDevicePtr dev,
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Active %s devices on bus with %s, not doing bus reset"),
conflict->name, dev->name);
- virPCIDeviceFree(conflict);
return -1;
}
@@ -848,7 +846,6 @@ virPCIDeviceTrySecondaryBusReset(virPCIDevicePtr dev,
out:
virPCIDeviceConfigClose(parent, parentfd);
- virPCIDeviceFree(parent);
return ret;
}
@@ -1270,8 +1267,8 @@ virPCIDeviceBindToStubWithNewid(virPCIDevicePtr dev)
VIR_AUTOFREE(char *) stubDriverPath = NULL;
VIR_AUTOFREE(char *) driverLink = NULL;
VIR_AUTOFREE(char *) path = NULL; /* reused for different purposes */
+ VIR_AUTOPTR(virError) err = NULL;
const char *stubDriverName = NULL;
- virErrorPtr err = NULL;
/* Check the device is configured to use one of the known stub drivers */
if (dev->stubDriver == VIR_PCI_STUB_DRIVER_NONE) {
@@ -1406,7 +1403,6 @@ virPCIDeviceBindToStubWithNewid(virPCIDevicePtr dev)
if (err)
virSetError(err);
- virFreeError(err);
return result;
}
@@ -1679,19 +1675,13 @@ virPCIGetAddrString(unsigned int domain,
unsigned int function,
char **pciConfigAddr)
{
- virPCIDevicePtr dev = NULL;
- int ret = -1;
+ VIR_AUTOPTR(virPCIDevice) dev = NULL;
dev = virPCIDeviceNew(domain, bus, slot, function);
- if (dev != NULL) {
- if (VIR_STRDUP(*pciConfigAddr, dev->name) < 0)
- goto cleanup;
- ret = 0;
- }
+ if (!dev || VIR_STRDUP(*pciConfigAddr, dev->name) < 0)
+ return -1;
- cleanup:
- virPCIDeviceFree(dev);
- return ret;
+ return 0;
}
virPCIDevicePtr
@@ -1700,7 +1690,8 @@ virPCIDeviceNew(unsigned int domain,
unsigned int slot,
unsigned int function)
{
- virPCIDevicePtr dev;
+ virPCIDevicePtr ret = NULL;
+ VIR_AUTOPTR(virPCIDevice) dev = NULL;
VIR_AUTOFREE(char *) vendor = NULL;
VIR_AUTOFREE(char *) product = NULL;
@@ -1717,17 +1708,17 @@ virPCIDeviceNew(unsigned int domain,
virReportError(VIR_ERR_INTERNAL_ERROR,
_("dev->name buffer overflow: %.4x:%.2x:%.2x.%.1x"),
domain, bus, slot, function);
- goto error;
+ goto cleanup;
}
if (virAsprintf(&dev->path, PCI_SYSFS "devices/%s/config",
dev->name) < 0)
- goto error;
+ goto cleanup;
if (!virFileExists(dev->path)) {
virReportSystemError(errno,
_("Device %s not found: could not access %s"),
dev->name, dev->path);
- goto error;
+ goto cleanup;
}
vendor = virPCIDeviceReadID(dev, "vendor");
@@ -1737,7 +1728,7 @@ virPCIDeviceNew(unsigned int domain,
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to read product/vendor ID for %s"),
dev->name);
- goto error;
+ goto cleanup;
}
/* strings contain '0x' prefix */
@@ -1746,18 +1737,15 @@ virPCIDeviceNew(unsigned int domain,
virReportError(VIR_ERR_INTERNAL_ERROR,
_("dev->id buffer overflow: %s %s"),
&vendor[2], &product[2]);
- goto error;
+ goto cleanup;
}
VIR_DEBUG("%s %s: initialized", dev->id, dev->name);
- cleanup:
- return dev;
+ VIR_STEAL_PTR(ret, dev);
- error:
- virPCIDeviceFree(dev);
- dev = NULL;
- goto cleanup;;
+ cleanup:
+ return ret;
}
@@ -1960,14 +1948,14 @@ virPCIDeviceListAdd(virPCIDeviceListPtr list,
int
virPCIDeviceListAddCopy(virPCIDeviceListPtr list, virPCIDevicePtr dev)
{
- virPCIDevicePtr copy = virPCIDeviceCopy(dev);
+ VIR_AUTOPTR(virPCIDevice) copy = virPCIDeviceCopy(dev);
if (!copy)
return -1;
- if (virPCIDeviceListAdd(list, copy) < 0) {
- virPCIDeviceFree(copy);
+ if (virPCIDeviceListAdd(list, copy) < 0)
return -1;
- }
+
+ copy = NULL;
return 0;
}
@@ -2015,8 +2003,7 @@ void
virPCIDeviceListDel(virPCIDeviceListPtr list,
virPCIDevicePtr dev)
{
- virPCIDevicePtr ret = virPCIDeviceListSteal(list, dev);
- virPCIDeviceFree(ret);
+ VIR_AUTOPTR(virPCIDevice) ret = virPCIDeviceListSteal(list, dev);
}
int
@@ -2170,22 +2157,18 @@ virPCIDeviceAddressIOMMUGroupIterate(virPCIDeviceAddressPtr orig,
static int
virPCIDeviceGetIOMMUGroupAddOne(virPCIDeviceAddressPtr newDevAddr, void *opaque)
{
- int ret = -1;
virPCIDeviceListPtr groupList = opaque;
- virPCIDevicePtr newDev;
+ VIR_AUTOPTR(virPCIDevice) newDev = NULL;
if (!(newDev = virPCIDeviceNew(newDevAddr->domain, newDevAddr->bus,
newDevAddr->slot, newDevAddr->function)))
- goto cleanup;
+ return -1;
if (virPCIDeviceListAdd(groupList, newDev) < 0)
- goto cleanup;
+ return -1;
newDev = NULL; /* it's now on the list */
- ret = 0;
- cleanup:
- virPCIDeviceFree(newDev);
- return ret;
+ return 0;
}
@@ -2397,7 +2380,7 @@ virPCIDeviceDownstreamLacksACS(virPCIDevicePtr dev)
static int
virPCIDeviceIsBehindSwitchLackingACS(virPCIDevicePtr dev)
{
- virPCIDevicePtr parent;
+ VIR_AUTOPTR(virPCIDevice) parent = NULL;
if (virPCIDeviceGetParent(dev, &parent) < 0)
return -1;
@@ -2421,14 +2404,13 @@ virPCIDeviceIsBehindSwitchLackingACS(virPCIDevicePtr dev)
* parent can be found
*/
do {
- virPCIDevicePtr tmp;
+ VIR_AUTOPTR(virPCIDevice) tmp = NULL;
int acs;
int ret;
acs = virPCIDeviceDownstreamLacksACS(parent);
if (acs) {
- virPCIDeviceFree(parent);
if (acs < 0)
return -1;
else
@@ -2437,7 +2419,6 @@ virPCIDeviceIsBehindSwitchLackingACS(virPCIDevicePtr dev)
tmp = parent;
ret = virPCIDeviceGetParent(parent, &parent);
- virPCIDeviceFree(tmp);
if (ret < 0)
return -1;
} while (parent);
@@ -2942,7 +2923,7 @@ virPCIGetMdevTypes(const char *sysfspath,
DIR *dir = NULL;
struct dirent *entry;
VIR_AUTOFREE(char *) types_path = NULL;
- virMediatedDeviceTypePtr mdev_type = NULL;
+ VIR_AUTOPTR(virMediatedDeviceType) mdev_type = NULL;
virMediatedDeviceTypePtr *mdev_types = NULL;
size_t ntypes = 0;
size_t i;
@@ -2978,7 +2959,6 @@ virPCIGetMdevTypes(const char *sysfspath,
ret = ntypes;
ntypes = 0;
cleanup:
- virMediatedDeviceTypeFree(mdev_type);
for (i = 0; i < ntypes; i++)
virMediatedDeviceTypeFree(mdev_types[i]);
VIR_FREE(mdev_types);
--
1.8.3.1
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