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network: Taint networks that are using hook script

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Basically, the idea is copied from domain code, where tainting
exists for a while. Currently, only one taint reason exists -
VIR_NETWORK_TAINT_HOOK to mark those networks which caused invoking
of hook script.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik 2014-02-04 17:36:54 +01:00
parent f1ab06e43d
commit 9de7309125
4 changed files with 91 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/conf/network_conf.c
View File

@ -72,6 +72,22 @@ VIR_ENUM_IMPL(virNetworkDNSForwardPlainNames,
"yes",
"no")
VIR_ENUM_IMPL(virNetworkTaint, VIR_NETWORK_TAINT_LAST,
"hook-script");
bool
virNetworkObjTaint(virNetworkObjPtr obj,
enum virNetworkTaintFlags taint)
{
unsigned int flag = (1 << taint);
if (obj->taint & flag)
return false;
obj->taint |= flag;
return true;
}
virNetworkObjPtr virNetworkFindByUUID(virNetworkObjListPtr nets,
const unsigned char *uuid)
{
@ -2784,6 +2800,7 @@ virNetworkObjFormat(virNetworkObjPtr net,
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *class_id = virBitmapFormat(net->class_id);
size_t i;
if (!class_id)
goto no_memory;
@ -2793,6 +2810,12 @@ virNetworkObjFormat(virNetworkObjPtr net,
virBufferAsprintf(&buf, " <floor sum='%llu'/>\n", net->floor_sum);
VIR_FREE(class_id);
for (i = 0; i < VIR_NETWORK_TAINT_LAST; i++) {
if (net->taint & (1 << i))
virBufferAsprintf(&buf, " <taint flag='%s'/>\n",
virNetworkTaintTypeToString(i));
}
virBufferAdjustIndent(&buf, 2);
if (virNetworkDefFormatBuf(&buf, net->def, flags) < 0)
goto error;
@ -2903,10 +2926,13 @@ virNetworkLoadState(virNetworkObjListPtr nets,
virNetworkDefPtr def = NULL;
virNetworkObjPtr net = NULL;
xmlDocPtr xml = NULL;
xmlNodePtr node = NULL;
xmlNodePtr node = NULL, *nodes = NULL;
xmlXPathContextPtr ctxt = NULL;
virBitmapPtr class_id_map = NULL;
unsigned long long floor_sum_val = 0;
unsigned int taint = 0;
int n;
size_t i;
if ((configFile = virNetworkConfigFile(stateDir, name)) == NULL)
@ -2962,6 +2988,27 @@ virNetworkLoadState(virNetworkObjListPtr nets,
goto error;
}
VIR_FREE(floor_sum);
if ((n = virXPathNodeSet("./taint", ctxt, &nodes)) < 0)
goto error;
for (i = 0; i < n; i++) {
char *str = virXMLPropString(nodes[i], "flag");
if (str) {
int flag = virNetworkTaintTypeFromString(str);
if (flag < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unknown taint flag %s"), str);
VIR_FREE(str);
goto error;
}
VIR_FREE(str);
/* Compute taint mask here. The network object does not
* exist yet, so we can't use virNetworkObjtTaint. */
taint |= (1 << flag);
}
}
VIR_FREE(nodes);
}
/* create the object */
@ -2978,6 +3025,8 @@ virNetworkLoadState(virNetworkObjListPtr nets,
if (floor_sum_val > 0)
net->floor_sum = floor_sum_val;
net->taint = taint;
cleanup:
VIR_FREE(configFile);
xmlFreeDoc(xml);
@ -2985,6 +3034,7 @@ cleanup:
return net;
error:
VIR_FREE(nodes);
virBitmapFree(class_id_map);
virNetworkDefFree(def);
goto cleanup;

17
src/conf/network_conf.h
View File

@ -287,6 +287,8 @@ struct _virNetworkObj {
virBitmapPtr class_id; /* bitmap of class IDs for QoS */
unsigned long long floor_sum; /* sum of all 'floor'-s of attached NICs */
unsigned int taint;
};
typedef struct _virNetworkObjList virNetworkObjList;
@ -296,12 +298,26 @@ struct _virNetworkObjList {
virNetworkObjPtr *objs;
};
enum virNetworkTaintFlags {
VIR_NETWORK_TAINT_HOOK, /* Hook script was executed over
network. We can't guarantee
connectivity or other settings
as the script may have played
with iptables, tc, you name it.
*/
VIR_NETWORK_TAINT_LAST
};
static inline int
virNetworkObjIsActive(const virNetworkObj *net)
{
return net->active;
}
bool virNetworkObjTaint(virNetworkObjPtr obj,
enum virNetworkTaintFlags taint);
virNetworkObjPtr virNetworkFindByUUID(virNetworkObjListPtr nets,
const unsigned char *uuid);
virNetworkObjPtr virNetworkFindByName(virNetworkObjListPtr nets,
@ -455,4 +471,5 @@ virNetworkDefUpdateSection(virNetworkDefPtr def,
const char *xml,
unsigned int flags); /* virNetworkUpdateFlags */
VIR_ENUM_DECL(virNetworkTaint)
#endif /* __NETWORK_CONF_H__ */

3
src/libvirt_private.syms
View File

@ -529,6 +529,7 @@ virNetworkObjListFree;
virNetworkObjLock;
virNetworkObjReplacePersistentDef;
virNetworkObjSetDefTransient;
virNetworkObjTaint;
virNetworkObjUnlock;
virNetworkObjUnsetDefTransient;
virNetworkObjUpdate;
@ -537,6 +538,8 @@ virNetworkSaveConfig;
virNetworkSaveStatus;
virNetworkSetBridgeMacAddr;
virNetworkSetBridgeName;
virNetworkTaintTypeFromString;
virNetworkTaintTypeToString;
virPortGroupFindByName;

20
src/network/bridge_driver.c
View File

@ -112,6 +112,9 @@ static int networkPlugBandwidth(virNetworkObjPtr net,
static int networkUnplugBandwidth(virNetworkObjPtr net,
virDomainNetDefPtr iface);
static void networkNetworkObjTaint(virNetworkObjPtr net,
enum virNetworkTaintFlags taint);
static virNetworkDriverStatePtr driverState = NULL;
static virNetworkObjPtr
@ -169,6 +172,8 @@ networkRunHook(virNetworkObjPtr network,
*/
if (hookret < 0)
goto cleanup;
networkNetworkObjTaint(network, VIR_NETWORK_TAINT_HOOK);
}
ret = 0;
@ -4344,3 +4349,18 @@ networkUnplugBandwidth(virNetworkObjPtr net,
cleanup:
return ret;
}
static void
networkNetworkObjTaint(virNetworkObjPtr net,
enum virNetworkTaintFlags taint)
{
if (virNetworkObjTaint(net, taint)) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(net->def->uuid, uuidstr);
VIR_WARN("Network name='%s' uuid=%s is tainted: %s",
net->def->name,
uuidstr,
virNetworkTaintTypeToString(taint));
}
}