[libvirt] PATCH: 13/28: Reduce return points in network driver
Daniel P. Berrange
berrange at redhat.com
Sun Nov 30 23:55:03 UTC 2008
This patch reduces the number of return points in the network driver
methods
network_driver.c | 275 +++++++++++++++++++++++++++++++------------------------
1 file changed, 159 insertions(+), 116 deletions(-)
Daniel
diff --git a/src/network_driver.c b/src/network_driver.c
--- a/src/network_driver.c
+++ b/src/network_driver.c
@@ -118,7 +118,7 @@ networkStartup(void) {
char *base = NULL;
if (VIR_ALLOC(driverState) < 0)
- return -1;
+ goto error;
if (!uid) {
if (asprintf(&driverState->logDir,
@@ -160,19 +160,20 @@ networkStartup(void) {
if (virNetworkLoadAllConfigs(NULL,
&driverState->networks,
driverState->networkConfigDir,
- driverState->networkAutostartDir) < 0) {
- networkShutdown();
- return -1;
- }
+ driverState->networkAutostartDir) < 0)
+ goto error;
+
networkAutostartConfigs(driverState);
return 0;
- out_of_memory:
+out_of_memory:
networkLog (NETWORK_ERR,
"%s", _("networkStartup: out of memory\n"));
+
+error:
VIR_FREE(base);
- VIR_FREE(driverState);
+ networkShutdown();
return -1;
}
@@ -214,16 +215,18 @@ static int
static int
networkActive(void) {
unsigned int i;
+ int active = 0;
if (!driverState)
return 0;
- for (i = 0 ; i < driverState->networks.count ; i++)
- if (virNetworkIsActive(driverState->networks.objs[i]))
- return 1;
+ for (i = 0 ; i < driverState->networks.count ; i++) {
+ virNetworkObjPtr net = driverState->networks.objs[i];
+ if (virNetworkIsActive(net))
+ active = 1;
+ }
- /* Otherwise we're happy to deal with a shutdown */
- return 0;
+ return active;
}
/**
@@ -239,10 +242,12 @@ networkShutdown(void) {
return -1;
/* shutdown active networks */
- for (i = 0 ; i < driverState->networks.count ; i++)
- if (virNetworkIsActive(driverState->networks.objs[i]))
+ for (i = 0 ; i < driverState->networks.count ; i++) {
+ virNetworkObjPtr net = driverState->networks.objs[i];
+ if (virNetworkIsActive(net))
networkShutdownNetworkDaemon(NULL, driverState,
driverState->networks.objs[i]);
+ }
/* free inactive networks */
virNetworkObjListFree(&driverState->networks);
@@ -804,35 +809,42 @@ static int networkShutdownNetworkDaemon(
}
-static virNetworkPtr networkLookupByUUID(virConnectPtr conn ATTRIBUTE_UNUSED,
- const unsigned char *uuid) {
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, uuid);
- virNetworkPtr net;
+static virNetworkPtr networkLookupByUUID(virConnectPtr conn,
+ const unsigned char *uuid) {
+ struct network_driver *driver = conn->networkPrivateData;
+ virNetworkObjPtr network;
+ virNetworkPtr ret = NULL;
+ network = virNetworkFindByUUID(&driver->networks, uuid);
if (!network) {
networkReportError(conn, NULL, NULL, VIR_ERR_NO_NETWORK,
"%s", _("no network with matching uuid"));
- return NULL;
+ goto cleanup;
}
- net = virGetNetwork(conn, network->def->name, network->def->uuid);
- return net;
+ ret = virGetNetwork(conn, network->def->name, network->def->uuid);
+
+cleanup:
+ return ret;
}
-static virNetworkPtr networkLookupByName(virConnectPtr conn ATTRIBUTE_UNUSED,
- const char *name) {
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByName(&driver->networks, name);
- virNetworkPtr net;
+static virNetworkPtr networkLookupByName(virConnectPtr conn,
+ const char *name) {
+ struct network_driver *driver = conn->networkPrivateData;
+ virNetworkObjPtr network;
+ virNetworkPtr ret = NULL;
+
+ network = virNetworkFindByName(&driver->networks, name);
if (!network) {
networkReportError(conn, NULL, NULL, VIR_ERR_NO_NETWORK,
"%s", _("no network with matching name"));
- return NULL;
+ goto cleanup;
}
- net = virGetNetwork(conn, network->def->name, network->def->uuid);
- return net;
+ ret = virGetNetwork(conn, network->def->name, network->def->uuid);
+
+cleanup:
+ return ret;
}
static virDrvOpenStatus networkOpenNetwork(virConnectPtr conn,
@@ -852,7 +864,7 @@ static int networkCloseNetwork(virConnec
static int networkNumNetworks(virConnectPtr conn) {
int nactive = 0, i;
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
+ struct network_driver *driver = conn->networkPrivateData;
for (i = 0 ; i < driver->networks.count ; i++)
if (virNetworkIsActive(driver->networks.objs[i]))
@@ -862,7 +874,7 @@ static int networkNumNetworks(virConnect
}
static int networkListNetworks(virConnectPtr conn, char **const names, int nnames) {
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
+ struct network_driver *driver = conn->networkPrivateData;
int got = 0, i;
for (i = 0 ; i < driver->networks.count && got < nnames ; i++) {
@@ -885,7 +897,7 @@ static int networkListNetworks(virConnec
static int networkNumDefinedNetworks(virConnectPtr conn) {
int ninactive = 0, i;
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
+ struct network_driver *driver = conn->networkPrivateData;
for (i = 0 ; i < driver->networks.count ; i++)
if (!virNetworkIsActive(driver->networks.objs[i]))
@@ -895,7 +907,7 @@ static int networkNumDefinedNetworks(vir
}
static int networkListDefinedNetworks(virConnectPtr conn, char **const names, int nnames) {
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
+ struct network_driver *driver = conn->networkPrivateData;
int got = 0, i;
for (i = 0 ; i < driver->networks.count && got < nnames ; i++) {
@@ -917,45 +929,47 @@ static int networkListDefinedNetworks(vi
}
static virNetworkPtr networkCreate(virConnectPtr conn, const char *xml) {
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
+ struct network_driver *driver = conn->networkPrivateData;
virNetworkDefPtr def;
virNetworkObjPtr network;
- virNetworkPtr net;
+ virNetworkPtr ret = NULL;
if (!(def = virNetworkDefParseString(conn, xml)))
- return NULL;
+ goto cleanup;
if (!(network = virNetworkAssignDef(conn,
&driver->networks,
- def))) {
- virNetworkDefFree(def);
- return NULL;
- }
+ def)))
+ goto cleanup;
+ def = NULL;
if (networkStartNetworkDaemon(conn, driver, network) < 0) {
virNetworkRemoveInactive(&driver->networks,
network);
- return NULL;
+ goto cleanup;
}
- net = virGetNetwork(conn, network->def->name, network->def->uuid);
- return net;
+ ret = virGetNetwork(conn, network->def->name, network->def->uuid);
+
+cleanup:
+ virNetworkDefFree(def);
+ return ret;
}
static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
- struct network_driver *driver = (struct network_driver *)conn->networkPrivateData;
+ struct network_driver *driver = conn->networkPrivateData;
virNetworkDefPtr def;
virNetworkObjPtr network;
+ virNetworkPtr ret = NULL;
if (!(def = virNetworkDefParseString(conn, xml)))
- return NULL;
+ goto cleanup;
if (!(network = virNetworkAssignDef(conn,
&driver->networks,
- def))) {
- virNetworkDefFree(def);
- return NULL;
- }
+ def)))
+ goto cleanup;
+ def = NULL;
if (virNetworkSaveConfig(conn,
driver->networkConfigDir,
@@ -963,158 +977,187 @@ static virNetworkPtr networkDefine(virCo
network) < 0) {
virNetworkRemoveInactive(&driver->networks,
network);
- return NULL;
+ goto cleanup;
}
- return virGetNetwork(conn, network->def->name, network->def->uuid);
+ ret = virGetNetwork(conn, network->def->name, network->def->uuid);
+
+cleanup:
+ virNetworkDefFree(def);
+ return ret;
}
static int networkUndefine(virNetworkPtr net) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ int ret = -1;
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_DOMAIN,
- "%s", _("no network with matching uuid"));
- return -1;
+ "%s", _("no network with matching uuid"));
+ goto cleanup;
}
if (virNetworkIsActive(network)) {
networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
- "%s", _("network is still active"));
- return -1;
+ "%s", _("network is still active"));
+ goto cleanup;
}
if (virNetworkDeleteConfig(net->conn, network) < 0)
- return -1;
+ goto cleanup;
virNetworkRemoveInactive(&driver->networks,
network);
+ ret = 0;
- return 0;
+cleanup:
+ return ret;
}
static int networkStart(virNetworkPtr net) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ int ret = -1;
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
- "%s", _("no network with matching uuid"));
- return -1;
+ "%s", _("no network with matching uuid"));
+ goto cleanup;
}
- return networkStartNetworkDaemon(net->conn, driver, network);
+ ret = networkStartNetworkDaemon(net->conn, driver, network);
+
+cleanup:
+ return ret;
}
static int networkDestroy(virNetworkPtr net) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
- int ret;
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ int ret = -1;
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
- "%s", _("no network with matching uuid"));
- return -1;
+ "%s", _("no network with matching uuid"));
+ goto cleanup;
}
ret = networkShutdownNetworkDaemon(net->conn, driver, network);
+cleanup:
return ret;
}
static char *networkDumpXML(virNetworkPtr net, int flags ATTRIBUTE_UNUSED) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ char *ret = NULL;
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
- "%s", _("no network with matching uuid"));
- return NULL;
+ "%s", _("no network with matching uuid"));
+ goto cleanup;
}
- return virNetworkDefFormat(net->conn, network->def);
+ ret = virNetworkDefFormat(net->conn, network->def);
+
+cleanup:
+ return ret;
}
static char *networkGetBridgeName(virNetworkPtr net) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
- char *bridge;
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ char *bridge = NULL;
+
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
- "%s", _("no network with matching id"));
- return NULL;
+ "%s", _("no network with matching id"));
+ goto cleanup;
}
bridge = strdup(network->def->bridge);
- if (!bridge) {
+ if (!bridge)
networkReportError(net->conn, NULL, net, VIR_ERR_NO_MEMORY,
- "%s", _("failed to allocate space for network bridge string"));
- return NULL;
- }
+ "%s", _("failed to allocate space for network bridge string"));
+
+cleanup:
return bridge;
}
static int networkGetAutostart(virNetworkPtr net,
int *autostart) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ int ret = -1;
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
"%s", _("no network with matching uuid"));
- return -1;
+ goto cleanup;
}
*autostart = network->autostart;
+ ret = 0;
- return 0;
+cleanup:
+ return ret;
}
static int networkSetAutostart(virNetworkPtr net,
int autostart) {
- struct network_driver *driver = (struct network_driver *)net->conn->networkPrivateData;
- virNetworkObjPtr network = virNetworkFindByUUID(&driver->networks, net->uuid);
+ struct network_driver *driver = net->conn->networkPrivateData;
+ virNetworkObjPtr network;
+ int ret = -1;
+ network = virNetworkFindByUUID(&driver->networks, net->uuid);
if (!network) {
networkReportError(net->conn, NULL, net, VIR_ERR_INVALID_NETWORK,
"%s", _("no network with matching uuid"));
- return -1;
+ goto cleanup;
}
autostart = (autostart != 0);
- if (network->autostart == autostart)
- return 0;
+ if (network->autostart != autostart) {
+ if (autostart) {
+ int err;
- if (autostart) {
- int err;
+ if ((err = virFileMakePath(driver->networkAutostartDir))) {
+ networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
+ _("cannot create autostart directory %s: %s"),
+ driver->networkAutostartDir, strerror(err));
+ goto cleanup;
+ }
- if ((err = virFileMakePath(driver->networkAutostartDir))) {
- networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
- _("cannot create autostart directory %s: %s"),
- driver->networkAutostartDir, strerror(err));
- return -1;
+ if (symlink(network->configFile, network->autostartLink) < 0) {
+ networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
+ _("Failed to create symlink '%s' to '%s': %s"),
+ network->autostartLink, network->configFile, strerror(errno));
+ goto cleanup;
+ }
+ } else {
+ if (unlink(network->autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
+ networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
+ _("Failed to delete symlink '%s': %s"),
+ network->autostartLink, strerror(errno));
+ goto cleanup;
+ }
}
- if (symlink(network->configFile, network->autostartLink) < 0) {
- networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
- _("Failed to create symlink '%s' to '%s': %s"),
- network->autostartLink, network->configFile, strerror(errno));
- return -1;
- }
- } else {
- if (unlink(network->autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
- networkReportError(net->conn, NULL, net, VIR_ERR_INTERNAL_ERROR,
- _("Failed to delete symlink '%s': %s"),
- network->autostartLink, strerror(errno));
- return -1;
- }
+ network->autostart = autostart;
}
+ ret = 0;
- network->autostart = autostart;
-
- return 0;
+cleanup:
+ return ret;
}
--
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