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Add support for iSCSI target auto-discovery

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Since the previous patch added support for parsing the output of
the 'sendtargets' command, it is now trivial to support the
storage pool discovery API.

Given a hostname and optional portnumber and initiator IQN,
the code can return a full list of storage pool source docs,
each one representing a iSCSI target.

* src/storage/storage_backend_iscsi.c: Wire up target
  auto-discovery
This commit is contained in:
Daniel P. Berrange 2010-11-12 15:41:16 +00:00
parent 3c12b6542c
commit 1da8c5672f
1 changed files with 66 additions and 0 deletions
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66
src/storage/storage_backend_iscsi.c
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@ -568,6 +568,71 @@ virStorageBackendISCSIScanTargets(const char *portal,
}
static char *
virStorageBackendISCSIFindPoolSources(virConnectPtr conn ATTRIBUTE_UNUSED,
const char *srcSpec,
unsigned int flags ATTRIBUTE_UNUSED)
{
virStoragePoolSourcePtr source = NULL;
size_t ntargets = 0;
char **targets = NULL;
char *ret = NULL;
int i;
virStoragePoolSourceList list = {
.type = VIR_STORAGE_POOL_ISCSI,
.nsources = 0,
.sources = NULL
};
char *portal = NULL;
if (!(source = virStoragePoolDefParseSourceString(srcSpec,
list.type)))
return NULL;
if (!(portal = virStorageBackendISCSIPortal(source)))
goto cleanup;
if (virStorageBackendISCSIScanTargets(portal,
source->initiator.iqn,
&ntargets, &targets) < 0)
goto cleanup;
if (VIR_ALLOC_N(list.sources, ntargets) < 0) {
virReportOOMError();
goto cleanup;
}
for (i = 0 ; i < ntargets ; i++) {
if (VIR_ALLOC_N(list.sources[i].devices, 1) < 0) {
virReportOOMError();
goto cleanup;
}
list.sources[i].host = source->host;
list.sources[i].initiator = source->initiator;
list.sources[i].ndevice = 1;
list.sources[i].devices[0].path = targets[i];
list.nsources++;
}
if (!(ret = virStoragePoolSourceListFormat(&list))) {
virReportOOMError();
goto cleanup;
}
cleanup:
if (list.sources) {
for (i = 0 ; i < ntargets ; i++)
VIR_FREE(list.sources[i].devices);
VIR_FREE(list.sources);
}
for (i = 0 ; i < ntargets ; i++)
VIR_FREE(targets[i]);
VIR_FREE(targets);
VIR_FREE(portal);
virStoragePoolSourceFree(source);
return ret;
}
static int
virStorageBackendISCSIStartPool(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool)
@ -668,4 +733,5 @@ virStorageBackend virStorageBackendISCSI = {
.startPool = virStorageBackendISCSIStartPool,
.refreshPool = virStorageBackendISCSIRefreshPool,
.stopPool = virStorageBackendISCSIStopPool,
.findPoolSources = virStorageBackendISCSIFindPoolSources,
};