From 3706636ca05982996b16610233df3e303845238e Mon Sep 17 00:00:00 2001
From: Damjan Marion <damarion@cisco.com>
Date: Fri, 28 Jul 2023 20:06:09 +0200
Subject: vlib: remove dependency on libuuid

Type: improvement
Change-Id: I4e2b2e4f227dfcb3df36166db13c8aa5c0b603f5
Signed-off-by: Damjan Marion <damarion@cisco.com>
---
 src/vlib/CMakeLists.txt | 20 ++-------------
 src/vlib/linux/vmbus.c  | 65 ++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 55 insertions(+), 30 deletions(-)

(limited to 'src')

diff --git a/src/vlib/CMakeLists.txt b/src/vlib/CMakeLists.txt
index ca8c27b07f9..76de4edcde2 100644
--- a/src/vlib/CMakeLists.txt
+++ b/src/vlib/CMakeLists.txt
@@ -45,22 +45,6 @@ install(
   COMPONENT vpp-dev
 )
 
-##############################################################################
-# Find lib and include files
-##############################################################################
-message(STATUS "Looking for libuuid")
-vpp_find_path(UUID_INCLUDE_DIR NAMES uuid/uuid.h)
-vpp_find_library(UUID_LIB NAMES uuid)
-
-if(UUID_INCLUDE_DIR AND UUID_LIB)
-  include_directories(${UUID_INCLUDE_DIR})
-  set(VMBUS_SOURCE linux/vmbus.c)
-  set(VMBUS_LIBS uuid)
-  message(STATUS "Found uuid in ${UUID_INCLUDE_DIR}")
-else()
-  message(WARNING "-- libuuid not found - vmbus support disabled")
-endif()
-
 ##############################################################################
 # vlib shared library
 ##############################################################################
@@ -77,6 +61,7 @@ add_vpp_library(vlib
   init.c
   linux/pci.c
   linux/vfio.c
+  linux/vmbus.c
   log.c
   main.c
   node.c
@@ -104,7 +89,6 @@ add_vpp_library(vlib
   unix/plugin.c
   unix/util.c
   vmbus/vmbus.c
-  ${VMBUS_SOURCE}
   dma/dma.c
   dma/cli.c
 
@@ -154,7 +138,7 @@ add_vpp_library(vlib
   API_FILES
   pci/pci_types.api
 
-  LINK_LIBRARIES vppinfra svm ${VMBUS_LIBS} ${CMAKE_DL_LIBS}
+  LINK_LIBRARIES vppinfra svm ${CMAKE_DL_LIBS}
 
   DEPENDS api_headers
 )
diff --git a/src/vlib/linux/vmbus.c b/src/vlib/linux/vmbus.c
index 12813651d4c..aae11a1fefb 100644
--- 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";
@@ -123,16 +121,39 @@ 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;
 }
 
@@ -141,10 +162,24 @@ 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 */
@@ -383,7 +418,13 @@ 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 *
-- 
cgit 1.2.3-korg