net: introduce and use netdev_features_t for device features sets

v2:	add couple missing conversions in drivers
	split unexporting netdev_fix_features()
	implemented %pNF
	convert sock::sk_route_(no?)caps

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 993599e66e5a..8e75003d62f6 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -777,6 +777,18 @@ char *uuid_string(char *buf, char *end, const u8 *addr,
         return string(buf, end, uuid, spec);
 }
 
+static
+char *netdev_feature_string(char *buf, char *end, const u8 *addr,
+                      struct printf_spec spec)
+{
+        spec.flags |= SPECIAL | SMALL | ZEROPAD;
+        if (spec.field_width == -1)
+                spec.field_width = 2 + 2 * sizeof(netdev_features_t);
+        spec.base = 16;
+
+        return number(buf, end, *(const netdev_features_t *)addr, spec);
+}
+
 int kptr_restrict __read_mostly;
 
 /*
@@ -824,6 +836,7 @@ int kptr_restrict __read_mostly;
  *       Do not use this feature without some mechanism to verify the
  *       correctness of the format string and va_list arguments.
  * - 'K' For a kernel pointer that should be hidden from unprivileged users
+ * - 'NF' For a netdev_features_t
  *
  * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
  * function pointers are really function descriptors, which contain a
@@ -896,6 +909,12 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
                        has_capability_noaudit(current, CAP_SYSLOG))))
                         ptr = NULL;
                 break;
+        case 'N':
+                switch (fmt[1]) {
+                case 'F':
+                        return netdev_feature_string(buf, end, ptr, spec);
+                }
+                break;
         }
         spec.flags |= SMALL;
         if (spec.field_width == -1) {