From: Michal Privoznik <mprivozn@redhat.com>

A PCI device that is a network interface card also has 'net/'
subdir with interface name it corresponds to. For instance:

  # ls -l /sys/bus/pci/devices/0000\:00\:1f.6/net/
  total 0
  drwxr-xr-x 5 root root 0 Feb 26 16:51 eth0

Allow setting interface name for PCI devices.
Now, in real life the net/$IFNAME/ is a directory, but since our
code opens net/ dir and then just reads dentries creating file
instead of full blown dir is okay.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
---
 tests/virpcimock.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/tests/virpcimock.c b/tests/virpcimock.c
index c59359b889..22d2354ebe 100644
--- a/tests/virpcimock.c
+++ b/tests/virpcimock.c
@@ -144,6 +144,7 @@ struct pciDevice {
     int sriovTotalvfs;
     unsigned int virtfnCount;
     const char *physfn;
+    const char *netName;
     struct pciDriver *driver;   /* Driver attached. NULL if attached to no driver */
     struct pciVPD vpd;
 };
@@ -590,6 +591,18 @@ pci_device_new_from_stub(const struct pciDevice *data)
         register_vf(dev);
     }
 
+    if (dev->netName) {
+        if (g_snprintf(tmp, sizeof(tmp), "%s/net", devpath) < 0) {
+            ABORT("@tmp overflow");
+        }
+
+        if (g_mkdir_with_parents(tmp, 0777) < 0)
+            ABORT("Unable to create: %s", tmp);
+
+        /* In real sysfs this is a dir, but for test purposes a file is okay. */
+        make_file(tmp, dev->netName, dev->netName, -1);
+    }
+
     if (dev->vpd.data && dev->vpd.vpd_len)
         make_file(devpath, "vpd", dev->vpd.data, dev->vpd.vpd_len);
 
@@ -1072,8 +1085,10 @@ init_env(void)
         pci_device_new_from_stub(&dev); \
     } while (0)
 
-    MAKE_PCI_DEVICE("0000:00:00.0", 0x8086, 0x0044, 0);
-    MAKE_PCI_DEVICE("0000:00:01.0", 0x8086, 0x0044, 1);
+    MAKE_PCI_DEVICE("0000:00:00.0", 0x8086, 0x0044, 0,
+                    .netName = "wlan0");
+    MAKE_PCI_DEVICE("0000:00:01.0", 0x8086, 0x0044, 1,
+                    .netName = "wlan1");
     MAKE_PCI_DEVICE("0000:00:02.0", 0x8086, 0x0046, 2);
     MAKE_PCI_DEVICE("0000:00:03.0", 0x8086, 0x0048, 3);
     MAKE_PCI_DEVICE("0001:00:00.0", 0x1014, 0x03b9, 4, .klass = 0x060400);
@@ -1088,15 +1103,18 @@ init_env(void)
     MAKE_PCI_DEVICE("0000:0a:02.0", 0x8286, 0x0048, 8);
     MAKE_PCI_DEVICE("0000:0a:03.0", 0x8386, 0x0048, 8);
     MAKE_PCI_DEVICE("0000:06:12.0", 0x8086, 0x0047, 9,
-                    .sriovTotalvfs = 7);
+                    .sriovTotalvfs = 7, .netName = "enp1s0f0");
     MAKE_PCI_DEVICE("0000:06:12.1", 0x8086, 0x0047, 10,
-                    .physfn = "0000:06:12.0"); /* Virtual Function */
+                    .physfn = "0000:06:12.0", /* Virtual Function */
+                    .netName = "enp1s0f1");
     MAKE_PCI_DEVICE("0000:06:12.2", 0x8086, 0x0047, 11,
-                    .physfn = "0000:06:12.0"); /* Virtual Function */
+                    .physfn = "0000:06:12.0", /* Virtual Function */
+                    .netName = "enp1s0f2");
     MAKE_PCI_DEVICE("0021:de:1f.0", 0x8086, 0x0047, 12,
-                    .sriovTotalvfs = 7);
+                    .sriovTotalvfs = 7, .netName = "enp2s0f0");
     MAKE_PCI_DEVICE("0021:de:1f.1", 0x8086, 0x0047, 13,
-                    .physfn = "0021:de:1f.0"); /* Virtual Function */
+                    .physfn = "0021:de:1f.0", /* Virtual Function */
+                    .netName = "enp2s0f1");
 
     MAKE_PCI_DEVICE("0000:01:00.0", 0x1cc1, 0x8201, 14, .klass = 0x010802);
     MAKE_PCI_DEVICE("0000:02:00.0", 0x1cc1, 0x8201, 15, .klass = 0x010802);
-- 
2.52.0