tests: refactor pcap file deletion to improve robustness

[vpp.git] / src / vlib / linux / vmbus.c

diff --git a/src/vlib/linux/vmbus.c b/src/vlib/linux/vmbus.c
index 2fc438b..b066381 100644 (file)
--- a/src/vlib/linux/vmbus.c
+++ b/src/vlib/linux/vmbus.c
@@ -31,8 +31,6 @@
 #include <linux/ethtool.h>
 #include <linux/sockios.h>
 
-#include <uuid/uuid.h>
-
 static const char sysfs_vmbus_dev_path[] = "/sys/bus/vmbus/devices";
 static const char sysfs_vmbus_drv_path[] = "/sys/bus/vmbus/drivers";
 static const char sysfs_class_net_path[] = "/sys/class/net";
@@ -118,33 +116,70 @@ linux_vmbus_main_t linux_vmbus_main;
  * "f2c086b2-ff2e-11e8-88de-7bad0a57de05" and convert
  * it to u8[16]
  */
-static uword
-unformat_vlib_vmbus_addr (unformat_input_t * input, va_list * args)
+uword
+unformat_vlib_vmbus_addr (unformat_input_t *input, va_list *args)
 {
   vlib_vmbus_addr_t *addr = va_arg (*args, vlib_vmbus_addr_t *);
   uword ret = 0;
-  u8 *s;
+  u8 *s = 0;
 
-  if (!unformat (input, "%s", &s))
+  if (!unformat (input, "%U", unformat_token, "a-zA-Z0-9-", &s))
     return 0;
 
-  if (uuid_parse ((char *) s, addr->guid) == 0)
-    ret = 1;
+  if (vec_len (s) != 36)
+    goto fail;
 
-  vec_free (s);
+  if (s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-')
+    goto fail;
+
+  clib_memmove (s + 8, s + 9, 4);
+  clib_memmove (s + 12, s + 14, 4);
+  clib_memmove (s + 16, s + 19, 4);
+  clib_memmove (s + 20, s + 24, 12);
 
+  for (int i = 0; i < 32; i++)
+    if (s[i] >= '0' && s[i] <= '9')
+      s[i] -= '0';
+    else if (s[i] >= 'A' && s[i] <= 'F')
+      s[i] -= 'A' - 10;
+    else if (s[i] >= 'a' && s[i] <= 'f')
+      s[i] -= 'a' - 10;
+    else
+      goto fail;
+
+  for (int i = 0; i < 16; i++)
+    addr->guid[i] = s[2 * i] * 16 + s[2 * i + 1];
+
+  ret = 1;
+
+fail:
+  vec_free (s);
   return ret;
 }
 
 /* Convert bus address to standard UUID string */
-static u8 *
-format_vlib_vmbus_addr (u8 * s, va_list * va)
+u8 *
+format_vlib_vmbus_addr (u8 *s, va_list *va)
 {
   vlib_vmbus_addr_t *addr = va_arg (*va, vlib_vmbus_addr_t *);
-  char tmp[40];
-
-  uuid_unparse (addr->guid, tmp);
-  return format (s, "%s", tmp);
+  u8 *bytes = addr->guid;
+
+  for (int i = 0; i < 4; i++)
+    s = format (s, "%02X", bytes++[0]);
+  vec_add1 (s, '-');
+  for (int i = 0; i < 2; i++)
+    s = format (s, "%02X", bytes++[0]);
+  vec_add1 (s, '-');
+  for (int i = 0; i < 2; i++)
+    s = format (s, "%02X", bytes++[0]);
+  vec_add1 (s, '-');
+  for (int i = 0; i < 2; i++)
+    s = format (s, "%02X", bytes++[0]);
+  vec_add1 (s, '-');
+  for (int i = 0; i < 6; i++)
+    s = format (s, "%02X", bytes++[0]);
+
+  return s;
 }
 
 /* workaround for mlx bug, bring lower device up before unbind */
@@ -218,16 +253,14 @@ vlib_vmbus_bind_to_uio (vlib_vmbus_addr_t * addr)
   static int uio_new_id_needed = 1;
   struct dirent *e;
   struct ifreq ifr;
-  u8 *s, *driver_name;
+  u8 *s = 0, *driver_name;
   DIR *dir;
   int fd;
 
   dev_dir_name = format (0, "%s/%U", sysfs_vmbus_dev_path,
                         format_vlib_vmbus_addr, addr);
-  s = format (0, "%v/driver%c", dev_dir_name, 0);
 
-  driver_name = clib_sysfs_link_to_name ((char *) s);
-  vec_reset_length (s);
+  driver_name = clib_file_get_resolved_basename ("%v/driver", dev_dir_name);
 
   /* skip if not using the Linux kernel netvsc driver */
   if (!driver_name || strcmp ("hv_netvsc", (char *) driver_name) != 0)
@@ -284,9 +317,9 @@ vlib_vmbus_bind_to_uio (vlib_vmbus_addr_t * addr)
 
   if (ifr.ifr_flags & IFF_UP)
     {
-      error = clib_error_return (0,
-                                "Skipping VMBUS device %U as host interface %s is up",
-                                format_vlib_vmbus_addr, addr, e->d_name);
+      error = clib_error_return (
+       0, "Skipping VMBUS device %U as host interface %s is up",
+       format_vlib_vmbus_addr, addr, ifname);
       close (fd);
       goto done;
     }
@@ -297,15 +330,21 @@ vlib_vmbus_bind_to_uio (vlib_vmbus_addr_t * addr)
       vec_reset_length (s);
       s = format (s, "%s/%s/new_id%c", sysfs_vmbus_drv_path, uio_drv_name, 0);
       error = clib_sysfs_write ((char *) s, "%s", netvsc_uuid);
-
+      /* If device already exists, we can bind/unbind/override driver */
       if (error)
        {
-         close (fd);
-         goto done;
+         if (error->code == EEXIST)
+           {
+             clib_error_free (error);
+           }
+         else
+           {
+             close (fd);
+             goto done;
+           }
        }
 
       uio_new_id_needed = 0;
-
     }
 
   error = vlib_vmbus_raise_lower (fd, ifname);
@@ -377,7 +416,13 @@ vmbus_addr_cmp (void *v1, void *v2)
   vlib_vmbus_addr_t *a1 = v1;
   vlib_vmbus_addr_t *a2 = v2;
 
-  return uuid_compare (a1->guid, a2->guid);
+  for (int i = 0; i < ARRAY_LEN (a1->guid); i++)
+    if (a1->guid[i] > a2->guid[i])
+      return 1;
+    else if (a1->guid[i] < a2->guid[i])
+      return -1;
+
+  return 0;
 }
 
 vlib_vmbus_addr_t *