summaryrefslogtreecommitdiff
path: root/drivers/net/vxlan
diff options
context:
space:
mode:
authorJiri Benc <jbenc@redhat.com>2023-07-21 16:30:46 +0200
committerDavid S. Miller <davem@davemloft.net>2023-07-24 10:47:09 +0100
commit17a0a64448b568442a101de09575f81ffdc45d15 (patch)
treede5d136c2b49900a57d51f69d3dc94f1577e4c94 /drivers/net/vxlan
parent8d01da0a1db237c44c92859ce3612df7af8d3a53 (diff)
downloadlwn-17a0a64448b568442a101de09575f81ffdc45d15.tar.gz
lwn-17a0a64448b568442a101de09575f81ffdc45d15.zip
vxlan: generalize vxlan_parse_gpe_hdr and remove unused args
The vxlan_parse_gpe_hdr function extracts the next protocol value from the GPE header and marks GPE bits as parsed. In order to be used in the next patch, split the function into protocol extraction and bit marking. The bit marking is meaningful only in vxlan_rcv; move it directly there. Rename the function to vxlan_parse_gpe_proto to reflect what it now does. Remove unused arguments skb and vxflags. Move the function earlier in the file to allow it to be called from more places in the next patch. Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan')
-rw-r--r--drivers/net/vxlan/vxlan_core.c58
1 files changed, 28 insertions, 30 deletions
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 42be8a26c171..6d82adf1f8b3 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -623,6 +623,32 @@ static int vxlan_fdb_append(struct vxlan_fdb *f,
return 1;
}
+static bool vxlan_parse_gpe_proto(struct vxlanhdr *hdr, __be16 *protocol)
+{
+ struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)hdr;
+
+ /* Need to have Next Protocol set for interfaces in GPE mode. */
+ if (!gpe->np_applied)
+ return false;
+ /* "The initial version is 0. If a receiver does not support the
+ * version indicated it MUST drop the packet.
+ */
+ if (gpe->version != 0)
+ return false;
+ /* "When the O bit is set to 1, the packet is an OAM packet and OAM
+ * processing MUST occur." However, we don't implement OAM
+ * processing, thus drop the packet.
+ */
+ if (gpe->oam_flag)
+ return false;
+
+ *protocol = tun_p_to_eth_p(gpe->next_protocol);
+ if (!*protocol)
+ return false;
+
+ return true;
+}
+
static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
unsigned int off,
struct vxlanhdr *vh, size_t hdrlen,
@@ -1525,35 +1551,6 @@ out:
unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
}
-static bool vxlan_parse_gpe_hdr(struct vxlanhdr *unparsed,
- __be16 *protocol,
- struct sk_buff *skb, u32 vxflags)
-{
- struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)unparsed;
-
- /* Need to have Next Protocol set for interfaces in GPE mode. */
- if (!gpe->np_applied)
- return false;
- /* "The initial version is 0. If a receiver does not support the
- * version indicated it MUST drop the packet.
- */
- if (gpe->version != 0)
- return false;
- /* "When the O bit is set to 1, the packet is an OAM packet and OAM
- * processing MUST occur." However, we don't implement OAM
- * processing, thus drop the packet.
- */
- if (gpe->oam_flag)
- return false;
-
- *protocol = tun_p_to_eth_p(gpe->next_protocol);
- if (!*protocol)
- return false;
-
- unparsed->vx_flags &= ~VXLAN_GPE_USED_BITS;
- return true;
-}
-
static bool vxlan_set_mac(struct vxlan_dev *vxlan,
struct vxlan_sock *vs,
struct sk_buff *skb, __be32 vni)
@@ -1655,8 +1652,9 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
* used by VXLAN extensions if explicitly requested.
*/
if (vs->flags & VXLAN_F_GPE) {
- if (!vxlan_parse_gpe_hdr(&unparsed, &protocol, skb, vs->flags))
+ if (!vxlan_parse_gpe_proto(&unparsed, &protocol))
goto drop;
+ unparsed.vx_flags &= ~VXLAN_GPE_USED_BITS;
raw_proto = true;
}