dpdk: remove rte_mbuf modifications at many places in the code

[vpp.git] / vlib / vlib / unix / util.c

diff --git a/vlib/vlib/unix/util.c b/vlib/vlib/unix/util.c
index f4a2c81..edc3e59 100644 (file)
--- a/vlib/vlib/unix/util.c
+++ b/vlib/vlib/unix/util.c
@@ -103,6 +103,7 @@ vlib_sysfs_write (char *file_name, char *fmt, ...)
 {
   u8 *s;
   int fd;
+  clib_error_t *error = 0;
 
   fd = open (file_name, O_WRONLY);
   if (fd < 0)
@@ -114,11 +115,11 @@ vlib_sysfs_write (char *file_name, char *fmt, ...)
   va_end (va);
 
   if (write (fd, s, vec_len (s)) < 0)
-    return clib_error_return_unix (0, "write `%s'", file_name);
+    error = clib_error_return_unix (0, "write `%s'", file_name);
 
   vec_free (s);
   close (fd);
-  return 0;
+  return error;
 }
 
 clib_error_t *
@@ -181,12 +182,46 @@ vlib_sysfs_link_to_name (char *link)
     return 0;
 
   unformat_init_string (&in, p + 1, strlen (p + 1));
-  unformat (&in, "%s", &s);
+  if (unformat (&in, "%s", &s) != 1)
+    clib_unix_warning ("no string?");
   unformat_free (&in);
 
   return s;
 }
 
+int
+vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size)
+{
+  struct stat sb;
+  u8 *p = 0;
+  int r = -1;
+
+  p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0);
+
+  if (stat ((char *) p, &sb) == 0)
+    {
+      if (S_ISDIR (sb.st_mode) == 0)
+       goto done;
+    }
+  else if (numa_node == 0)
+    {
+      vec_reset_length (p);
+      p = format (p, "/sys/kernel/mm%c", 0);
+      if (stat ((char *) p, &sb) < 0 || S_ISDIR (sb.st_mode) == 0)
+       goto done;
+    }
+  else
+    goto done;
+
+  _vec_len (p) -= 1;
+  p = format (p, "/hugepages/hugepages-%ukB/free_hugepages%c", page_size, 0);
+  vlib_sysfs_read ((char *) p, "%d", &r);
+
+done:
+  vec_free (p);
+  return r;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *