net: sched: fix skb->protocol use in case of accelerated vlan path

tc code implicitly considers skb->protocol even in case of accelerated
vlan paths and expects vlan protocol type here. However, on rx path,
if the vlan header was already stripped, skb->protocol contains value
of next header. Similar situation is on tx path.

So for skbs that use skb->vlan_tci for tagging, use skb->vlan_proto instead.

Reported-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 13 insertions, 13 deletions

diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c
index edbf40dac709..4cd5cf1aedf8 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -509,7 +509,7 @@ static int tcf_csum(struct sk_buff *skb,
         if (unlikely(action == TC_ACT_SHOT))
                 goto drop;
 
-        switch (skb->protocol) {
+        switch (tc_skb_protocol(skb)) {
         case cpu_to_be16(ETH_P_IP):
                 if (!tcf_csum_ipv4(skb, update_flags))
                         goto drop;
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index 15d68f24a521..461410394d08 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -77,7 +77,7 @@ static u32 flow_get_dst(const struct sk_buff *skb, const struct flow_keys *flow)
 {
         if (flow->dst)
                 return ntohl(flow->dst);
-        return addr_fold(skb_dst(skb)) ^ (__force u16)skb->protocol;
+        return addr_fold(skb_dst(skb)) ^ (__force u16) tc_skb_protocol(skb);
 }
 
 static u32 flow_get_proto(const struct sk_buff *skb, const struct flow_keys *flow)
@@ -98,7 +98,7 @@ static u32 flow_get_proto_dst(const struct sk_buff *skb, const struct flow_keys
         if (flow->ports)
                 return ntohs(flow->port16[1]);
 
-        return addr_fold(skb_dst(skb)) ^ (__force u16)skb->protocol;
+        return addr_fold(skb_dst(skb)) ^ (__force u16) tc_skb_protocol(skb);
 }
 
 static u32 flow_get_iif(const struct sk_buff *skb)
@@ -144,7 +144,7 @@ static u32 flow_get_nfct(const struct sk_buff *skb)
 
 static u32 flow_get_nfct_src(const struct sk_buff *skb, const struct flow_keys *flow)
 {
-        switch (skb->protocol) {
+        switch (tc_skb_protocol(skb)) {
         case htons(ETH_P_IP):
                 return ntohl(CTTUPLE(skb, src.u3.ip));
         case htons(ETH_P_IPV6):
@@ -156,7 +156,7 @@ fallback:
 
 static u32 flow_get_nfct_dst(const struct sk_buff *skb, const struct flow_keys *flow)
 {
-        switch (skb->protocol) {
+        switch (tc_skb_protocol(skb)) {
         case htons(ETH_P_IP):
                 return ntohl(CTTUPLE(skb, dst.u3.ip));
         case htons(ETH_P_IPV6):
diff --git a/net/sched/em_ipset.c b/net/sched/em_ipset.c
index 5b4a4efe468c..a3d79c8bf3b8 100644
--- a/net/sched/em_ipset.c
+++ b/net/sched/em_ipset.c
@@ -59,7 +59,7 @@ static int em_ipset_match(struct sk_buff *skb, struct tcf_ematch *em,
         struct net_device *dev, *indev = NULL;
         int ret, network_offset;
 
-        switch (skb->protocol) {
+        switch (tc_skb_protocol(skb)) {
         case htons(ETH_P_IP):
                 acpar.family = NFPROTO_IPV4;
                 if (!pskb_network_may_pull(skb, sizeof(struct iphdr)))
diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index c8f8c399b99a..2159981b604e 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -197,7 +197,7 @@ META_COLLECTOR(int_priority)
 META_COLLECTOR(int_protocol)
 {
         /* Let userspace take care of the byte ordering */
-        dst->value = skb->protocol;
+        dst->value = tc_skb_protocol(skb);
 }
 
 META_COLLECTOR(int_pkttype)
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 76f402e05bd6..243b7d169d61 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1807,7 +1807,7 @@ done:
 int tc_classify_compat(struct sk_buff *skb, const struct tcf_proto *tp,
                        struct tcf_result *res)
 {
-        __be16 protocol = skb->protocol;
+        __be16 protocol = tc_skb_protocol(skb);
         int err;
 
         for (; tp; tp = rcu_dereference_bh(tp->next)) {
diff --git a/net/sched/sch_dsmark.c b/net/sched/sch_dsmark.c
index 227114f27f94..66700a6116aa 100644
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -203,7 +203,7 @@ static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch)
         pr_debug("%s(skb %p,sch %p,[qdisc %p])\n", __func__, skb, sch, p);
 
         if (p->set_tc_index) {
-                switch (skb->protocol) {
+                switch (tc_skb_protocol(skb)) {
                 case htons(ETH_P_IP):
                         if (skb_cow_head(skb, sizeof(struct iphdr)))
                                 goto drop;
@@ -289,7 +289,7 @@ static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
         index = skb->tc_index & (p->indices - 1);
         pr_debug("index %d->%d\n", skb->tc_index, index);
 
-        switch (skb->protocol) {
+        switch (tc_skb_protocol(skb)) {
         case htons(ETH_P_IP):
                 ipv4_change_dsfield(ip_hdr(skb), p->mask[index],
                                     p->value[index]);
@@ -306,7 +306,7 @@ static struct sk_buff *dsmark_dequeue(struct Qdisc *sch)
                  */
                 if (p->mask[index] != 0xff || p->value[index])
                         pr_warn("%s: unsupported protocol %d\n",
-                                __func__, ntohs(skb->protocol));
+                                __func__, ntohs(tc_skb_protocol(skb)));
                 break;
         }
 
diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index 4899d4a18aa5..e02687185a59 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -242,8 +242,8 @@ __teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res,
                 char haddr[MAX_ADDR_LEN];
 
                 neigh_ha_snapshot(haddr, n, dev);
-                err = dev_hard_header(skb, dev, ntohs(skb->protocol), haddr,
-                                      NULL, skb->len);
+                err = dev_hard_header(skb, dev, ntohs(tc_skb_protocol(skb)),
+                                      haddr, NULL, skb->len);
 
                 if (err < 0)
                         err = -EINVAL;