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virutil: Introduce virGetSCSIHostNameByParentaddr

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Create the function from the code in getAdapterName() in order to return
the "host#" name for the provided parentaddr values.
This commit is contained in:
John Ferlan 2014-10-06 16:18:23 -04:00
parent 55f439599c
commit beff5d4e1b
4 changed files with 63 additions and 13 deletions
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1
src/libvirt_private.syms
View File

@ -2160,6 +2160,7 @@ virGetGroupList;
virGetGroupName;
virGetHostname;
virGetListenFDs;
virGetSCSIHostNameByParentaddr;
virGetSCSIHostNumber;
virGetSelfLastChanged;
virGetUnprivSGIOSysfsPath;

19
src/storage/storage_backend_scsi.c
View File

@ -519,22 +519,15 @@ getAdapterName(virStoragePoolSourceAdapter adapter)
if (adapter.type == VIR_STORAGE_POOL_SOURCE_ADAPTER_TYPE_SCSI_HOST) {
if (adapter.data.scsi_host.has_parent) {
virDevicePCIAddress addr = adapter.data.scsi_host.parentaddr;
unsigned int unique_id = adapter.data.scsi_host.unique_id;
if (virAsprintf(&parentaddr, "%04x:%02x:%02x.%01x",
adapter.data.scsi_host.parentaddr.domain,
adapter.data.scsi_host.parentaddr.bus,
adapter.data.scsi_host.parentaddr.slot,
adapter.data.scsi_host.parentaddr.function) < 0)
if (!(name = virGetSCSIHostNameByParentaddr(addr.domain,
addr.bus,
addr.slot,
addr.function,
unique_id)))
goto cleanup;
if (!(name = virFindSCSIHostByPCI(NULL, parentaddr,
unique_id))) {
virReportError(VIR_ERR_XML_ERROR,
_("Failed to find scsi_host using PCI '%s' "
"and unique_id='%u'"),
parentaddr, unique_id);
goto cleanup;
}
} else {
ignore_value(VIR_STRDUP(name, adapter.data.scsi_host.name));
}

50
src/util/virutil.c
View File

@ -1884,6 +1884,45 @@ virGetSCSIHostNumber(const char *adapter_name,
return 0;
}
/* virGetSCSIHostNameByParentaddr:
* @domain: The domain from the scsi_host parentaddr
* @bus: The bus from the scsi_host parentaddr
* @slot: The slot from the scsi_host parentaddr
* @function: The function from the scsi_host parentaddr
* @unique_id: The unique id value for parentaddr
*
* Generate a parentaddr and find the scsi_host host# for
* the provided parentaddr PCI address fields.
*
* Returns the "host#" string which must be free'd by
* the caller or NULL on error
*/
char *
virGetSCSIHostNameByParentaddr(unsigned int domain,
unsigned int bus,
unsigned int slot,
unsigned int function,
unsigned int unique_id)
{
char *name = NULL;
char *parentaddr = NULL;
if (virAsprintf(&parentaddr, "%04x:%02x:%02x.%01x",
domain, bus, slot, function) < 0)
goto cleanup;
if (!(name = virFindSCSIHostByPCI(NULL, parentaddr, unique_id))) {
virReportError(VIR_ERR_XML_ERROR,
_("Failed to find scsi_host using PCI '%s' "
"and unique_id='%u'"),
parentaddr, unique_id);
goto cleanup;
}
cleanup:
VIR_FREE(parentaddr);
return name;
}
/* virReadFCHost:
* @sysfs_prefix: "fc_host" sysfs path, defaults to SYSFS_FC_HOST_PATH
* @host: Host number, E.g. 5 of "fc_host/host5"
@ -2262,6 +2301,17 @@ virGetSCSIHostNumber(const char *adapter_name ATTRIBUTE_UNUSED,
return NULL;
}
char *
virGetSCSIHostNameByParentaddr(unsigned int domain ATTRIBUTE_UNUSED,
unsigned int bus ATTRIBUTE_UNUSED,
unsigned int slot ATTRIBUTE_UNUSED,
unsigned int function ATTRIBUTE_UNUSED,
unsigned int unique_id ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s", _("Not supported on this platform"));
return NULL;
}
int
virReadFCHost(const char *sysfs_prefix ATTRIBUTE_UNUSED,
int host ATTRIBUTE_UNUSED,

6
src/util/virutil.h
View File

@ -177,6 +177,12 @@ int
virGetSCSIHostNumber(const char *adapter_name,
unsigned int *result)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
char *
virGetSCSIHostNameByParentaddr(unsigned int domain,
unsigned int bus,
unsigned int slot,
unsigned int function,
unsigned int unique_id);
int virReadFCHost(const char *sysfs_prefix,
int host,
const char *entry,