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authorDaniel Axtens <dja@axtens.net>2018-03-01 17:13:40 +1100
committerDavid S. Miller <davem@davemloft.net>2018-03-04 17:49:17 -0500
commita4a77718ee4053a44aa40fe67247c1afb5ce2f1e (patch)
tree7b62a1bae82408a1ba43822d2364ad36f02f4f69 /net
parent80f5974d15ea96c7112604c7999a83a502d15b9f (diff)
net: make skb_gso_*_seglen functions private
They're very hard to use properly as they do not consider the GSO_BY_FRAGS case. Code should use skb_gso_validate_network_len and skb_gso_validate_mac_len as they do consider this case. Make the seglen functions static, which stops people using them outside of skbuff.c Signed-off-by: Daniel Axtens <dja@axtens.net> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/skbuff.c37
1 files changed, 35 insertions, 2 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b63767008824..0bb0d8877954 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4891,7 +4891,7 @@ EXPORT_SYMBOL_GPL(skb_scrub_packet);
*
* The MAC/L2 or network (IP, IPv6) headers are not accounted for.
*/
-unsigned int skb_gso_transport_seglen(const struct sk_buff *skb)
+static unsigned int skb_gso_transport_seglen(const struct sk_buff *skb)
{
const struct skb_shared_info *shinfo = skb_shinfo(skb);
unsigned int thlen = 0;
@@ -4913,7 +4913,40 @@ unsigned int skb_gso_transport_seglen(const struct sk_buff *skb)
*/
return thlen + shinfo->gso_size;
}
-EXPORT_SYMBOL_GPL(skb_gso_transport_seglen);
+
+/**
+ * skb_gso_network_seglen - Return length of individual segments of a gso packet
+ *
+ * @skb: GSO skb
+ *
+ * skb_gso_network_seglen is used to determine the real size of the
+ * individual segments, including Layer3 (IP, IPv6) and L4 headers (TCP/UDP).
+ *
+ * The MAC/L2 header is not accounted for.
+ */
+static unsigned int skb_gso_network_seglen(const struct sk_buff *skb)
+{
+ unsigned int hdr_len = skb_transport_header(skb) -
+ skb_network_header(skb);
+
+ return hdr_len + skb_gso_transport_seglen(skb);
+}
+
+/**
+ * skb_gso_mac_seglen - Return length of individual segments of a gso packet
+ *
+ * @skb: GSO skb
+ *
+ * skb_gso_mac_seglen is used to determine the real size of the
+ * individual segments, including MAC/L2, Layer3 (IP, IPv6) and L4
+ * headers (TCP/UDP).
+ */
+static unsigned int skb_gso_mac_seglen(const struct sk_buff *skb)
+{
+ unsigned int hdr_len = skb_transport_header(skb) - skb_mac_header(skb);
+
+ return hdr_len + skb_gso_transport_seglen(skb);
+}
/**
* skb_gso_size_check - check the skb size, considering GSO_BY_FRAGS