[libvirt] [PATCH 3/5] Adding functions virNetDevGetVirtualFunctions and virNetDevGetNetName virNetDevGetVirtualFunctions: Gets the BDF of all the Virtual Functions given a physical function virNetDevGetNetName: Gets the interface name of the PCI Device.

[Shradha Shah]

---
 src/util/virnetdev.c |   89 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/util/virnetdev.h |   10 ++++++
 2 files changed, 99 insertions(+), 0 deletions(-)

diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 86196a1..d07d8fa 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -968,6 +968,76 @@ virNetDevSysfsDeviceFile(char **pf_sysfs_device_link, const char *ifname,
 }
 
 /**
+ * virNetDevGetVirtualFunctions:
+ *
+ * @pfname : name of the physical function interface name
+ * @virt_fns: array that will hold the pointers to the virtual_functions
+ * @num_virt_fns: number of virtual functions
+ *
+ * Returns 0 on success and -1 on failure
+ */
+
+int
+virNetDevGetVirtualFunctions(const char *pfname, 
+                         struct pci_config_address ***virt_fns,
+                         unsigned int *num_virt_fns)
+{
+    int ret = -1;
+    char *pf_sysfs_device_link = NULL;
+    
+    
+    if (virNetDevSysfsFile(&pf_sysfs_device_link, pfname, "device") < 0)
+        return ret;
+    
+    if (pciGetVirtualFunctions(pf_sysfs_device_link, virt_fns,
+                               num_virt_fns) < 0) 
+        goto out;
+    ret = 0;
+    
+out:
+    VIR_FREE(pf_sysfs_device_link);
+    return ret;
+}
+
+/**
+ * virNetDevGetNetName:
+ *
+ * @vf : pci address (BDF) of the Virtual Function
+ * @vfname: interface name of the virtual function returned by this function
+ *
+ * Returns 0 on success and -1 on failure
+ */
+
+int 
+virNetDevGetNetName(struct pci_config_address *vf, char **vfname)
+{
+    int ret = -1;
+    pciDevice *dev = NULL;
+    char *pci_sysfs_device_link = NULL;
+    
+    dev = pciGetDevice(vf->domain, vf->bus, vf->slot, vf->function);
+    if (dev != NULL) {
+        if (pciSysfsFile(&pci_sysfs_device_link, dev->name) < 0) {
+            virReportSystemError(ENOSYS, "%s",
+                         _("Failed to get PCI SYSFS file"));
+            goto out;
+        } 
+        
+        if (pciDeviceNetName(pci_sysfs_device_link, vfname) < 0) {
+            virReportSystemError(ENOSYS, "%s",
+                         _("Failed to get interface name of the VF"));
+            goto out;
+        }
+    }
+    ret = 0;
+    
+out:
+    VIR_FREE(pci_sysfs_device_link);
+    pciFreeDevice(dev);
+    return ret;
+}
+
+/**
  * virNetDevIsVirtualFunction:
  * @ifname : name of the interface
  *
@@ -1055,6 +1125,25 @@ virNetDevGetPhysicalFunction(const char *ifname, char **pfname)
 }
 #else /* !__linux__ */
 int
+virNetDevGetVirtualFunctions(const char *pfname ATTRIBUTE_UNUSED, 
+                         struct pci_config_address ***virt_fns ATTRIBUTE_UNUSED,
+                         unsigned int *num_virt_fns ATTRIBUTE_UNUSED)
+{
+    virReportSystemError(ENOSYS, "%s",
+                         _("Unable to get virtual functions on this platfornm"));
+    return -1;
+}
+
+int 
+virNetDevGetNetName(struct pci_config_address *vf ATTRIBUTE_UNUSED,
+                    char **vfname ATTRIBUTE_UNUSED)
+{
+    virReportSystemError(ENOSYS, "%s",
+                         _("Unable to get Device name on this platfornm"));
+    return -1;
+}
+
+int
 virNetDevIsVirtualFunction(const char *ifname ATTRIBUTE_UNUSED)
 {
     virReportSystemError(ENOSYS, "%s",
diff --git a/src/util/virnetdev.h b/src/util/virnetdev.h
index 13ba1da..4d1573a 100644
--- a/src/util/virnetdev.h
+++ b/src/util/virnetdev.h
@@ -24,6 +24,7 @@
 # define __VIR_NETDEV_H__
 
 # include "virsocketaddr.h"
+# include "pci.h"
 
 int virNetDevExists(const char *brname)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
@@ -99,4 +100,13 @@ int virNetDevGetVirtualFunctionIndex(const char *pfname, const char *vfname,
 int virNetDevGetPhysicalFunction(const char *ifname, char **pfname)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
 
+int virNetDevGetVirtualFunctions(const char *pfname, 
+                             struct pci_config_address ***virt_fns,
+                             unsigned int *num_virt_fns)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
+    ATTRIBUTE_RETURN_CHECK;
+
+int virNetDevGetNetName(struct pci_config_address *vf, char **vfname)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
+
 #endif /* __VIR_NETDEV_H__ */
-- 
1.7.4.4