12:28 p.m.
From: Roopa Prabhu <roprabhu(a)cisco.com>
This patch adds the following functions to get PF/VF relationship of an SRIOV
network interface:
ifaceIsVirtualFunction: Function to check if a network interface is a SRIOV VF
ifaceGetVirtualFunctionIndex: Function to get VF index if a network interface is a SRIOV
VF
ifaceGetPhysicalFunction: Function to get the PF net interface name of a SRIOV VF net
interface
Signed-off-by: Roopa Prabhu <roprabhu(a)cisco.com>
Signed-off-by: Christian Benvenuti <benve(a)cisco.com>
Signed-off-by: David Wang <dwang2(a)cisco.com>
---
src/util/interface.c | 148 ++++++++++++++++++++++++++++++++++++++++++++++++++
src/util/interface.h | 9 +++
2 files changed, 157 insertions(+), 0 deletions(-)
diff --git a/src/util/interface.c b/src/util/interface.c
index 8b4522b..aec12f5 100644
--- a/src/util/interface.c
+++ b/src/util/interface.c
@@ -45,6 +45,8 @@
#include "virfile.h"
#include "memory.h"
#include "netlink.h"
+#include "pci.h"
+#include "logging.h"
#define VIR_FROM_THIS VIR_FROM_NET
@@ -1196,3 +1198,149 @@ ifaceRestoreMacAddress(const char *linkdev,
return rc;
}
+
+#ifdef __linux__
+static int
+ifaceSysfsFile(char **pf_sysfs_device_link, const char *ifname,
+ const char *file)
+{
+
+ if (virAsprintf(pf_sysfs_device_link, NET_SYSFS "%s/%s",
+ ifname, file) < 0) {
+ virReportOOMError();
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+ifaceSysfsDeviceFile(char **pf_sysfs_device_link, const char *ifname,
+ const char *file)
+{
+
+ if (virAsprintf(pf_sysfs_device_link, NET_SYSFS "%s/device/%s",
+ ifname, file) < 0) {
+ virReportOOMError();
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * ifaceIsVirtualFunction
+ *
+ * @ifname : name of the interface
+ *
+ * Checks if an interface is a SRIOV virtual function.
+ *
+ * Returns 1 if interface is SRIOV virtual function, 0 if not and -1 if error
+ *
+ */
+int
+ifaceIsVirtualFunction(const char *ifname)
+{
+ char *if_sysfs_device_link = NULL;
+ int ret = -1;
+
+ if (ifaceSysfsFile(&if_sysfs_device_link, ifname, "device"))
+ return ret;
+
+ ret = pciDeviceIsVirtualFunction(if_sysfs_device_link);
+
+ VIR_FREE(if_sysfs_device_link);
+
+ return ret;
+}
+
+/**
+ * ifaceGetVirtualFunctionIndex
+ *
+ * @pfname : name of the physical function interface name
+ * @vfname : name of the virtual function interface name
+ * @vf_index : Pointer to int. Contains vf index of interface upon successful
+ * return
+ *
+ * Returns 0 on success, -1 on failure
+ *
+ */
+int
+ifaceGetVirtualFunctionIndex(const char *pfname, const char *vfname,
+ int *vf_index)
+{
+ char *pf_sysfs_device_link = NULL, *vf_sysfs_device_link = NULL;
+ int ret = -1;
+
+ if (ifaceSysfsFile(&pf_sysfs_device_link, pfname, "device"))
+ return ret;
+
+ if (ifaceSysfsFile(&vf_sysfs_device_link, vfname, "device")) {
+ VIR_FREE(pf_sysfs_device_link);
+ return ret;
+ }
+
+ ret = pciGetVirtualFunctionIndex(pf_sysfs_device_link,
+ vf_sysfs_device_link,
+ vf_index);
+
+ VIR_FREE(pf_sysfs_device_link);
+ VIR_FREE(vf_sysfs_device_link);
+
+ return ret;
+}
+
+/**
+ * ifaceGetPhysicalFunction
+ *
+ * @ifname : name of the physical function interface name
+ * @pfname : Contains sriov physical function for interface ifname
+ * upon successful return
+ *
+ * Returns 0 on success, -1 on failure
+ *
+ */
+int
+ifaceGetPhysicalFunction(const char *ifname, char **pfname)
+{
+ char *physfn_sysfs_path = NULL;
+ int ret = -1;
+
+ if (ifaceSysfsDeviceFile(&physfn_sysfs_path, ifname, "physfn"))
+ return ret;
+
+ ret = pciDeviceNetName(physfn_sysfs_path, pfname);
+
+ VIR_FREE(physfn_sysfs_path);
+
+ return ret;
+}
+#else
+int
+ifaceIsVirtualFunction(const char *ifname)
+{
+ ifaceError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("ifaceIsVirtualFunction is not supported on non-linux "
+ "platforms"));
+ return -1;
+}
+
+int
+ifaceGetVirtualFunctionIndex(const char *pfname, const char *vfname,
+ int *vf_index)
+{
+ ifaceError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("ifaceGetVirtualFunctionIndex is not supported on non-linux "
+ "platforms"));
+ return -1;
+}
+
+int
+ifaceGetPhysicalFunction(const char *ifname, char **pfname)
+{
+ ifaceError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("ifaceGetPhysicalFunction is not supported on non-linux "
+ "platforms"));
+ return -1;
+}
+#endif /* __linux__ */
diff --git a/src/util/interface.h b/src/util/interface.h
index 47c0eb0..7be1444 100644
--- a/src/util/interface.h
+++ b/src/util/interface.h
@@ -27,6 +27,8 @@ struct nlattr;
# include "datatypes.h"
# include "network.h"
+# define NET_SYSFS "/sys/class/net/"
+
int ifaceGetFlags(const char *name, short *flags);
int ifaceIsUp(const char *name, bool *up);
@@ -79,4 +81,11 @@ int ifaceReplaceMacAddress(const unsigned char *macaddress,
int ifaceRestoreMacAddress(const char *linkdev,
const char *stateDir);
+int ifaceIsVirtualFunction(const char *ifname);
+
+int ifaceGetVirtualFunctionIndex(const char *pfname, const char *vfname,
+ int *vf_index);
+
+int ifaceGetPhysicalFunction(const char *ifname, char **pfname);
+
#endif /* __VIR_INTERFACE_H__ */