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Diffstat (limited to 'net/sched/cls_flow.c')
-rw-r--r--net/sched/cls_flow.c188
1 files changed, 96 insertions, 92 deletions
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index 6994214db8f8..9e087d885675 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -65,132 +65,134 @@ static inline u32 addr_fold(void *addr)
return (a & 0xFFFFFFFF) ^ (BITS_PER_LONG > 32 ? a >> 32 : 0);
}
-static u32 flow_get_src(struct sk_buff *skb)
+static u32 flow_get_src(const struct sk_buff *skb, int nhoff)
{
+ __be32 *data = NULL, hdata;
+
switch (skb->protocol) {
case htons(ETH_P_IP):
- if (pskb_network_may_pull(skb, sizeof(struct iphdr)))
- return ntohl(ip_hdr(skb)->saddr);
+ data = skb_header_pointer(skb,
+ nhoff + offsetof(struct iphdr,
+ saddr),
+ 4, &hdata);
break;
case htons(ETH_P_IPV6):
- if (pskb_network_may_pull(skb, sizeof(struct ipv6hdr)))
- return ntohl(ipv6_hdr(skb)->saddr.s6_addr32[3]);
+ data = skb_header_pointer(skb,
+ nhoff + offsetof(struct ipv6hdr,
+ saddr.s6_addr32[3]),
+ 4, &hdata);
break;
}
+ if (data)
+ return ntohl(*data);
return addr_fold(skb->sk);
}
-static u32 flow_get_dst(struct sk_buff *skb)
+static u32 flow_get_dst(const struct sk_buff *skb, int nhoff)
{
+ __be32 *data = NULL, hdata;
+
switch (skb->protocol) {
case htons(ETH_P_IP):
- if (pskb_network_may_pull(skb, sizeof(struct iphdr)))
- return ntohl(ip_hdr(skb)->daddr);
+ data = skb_header_pointer(skb,
+ nhoff + offsetof(struct iphdr,
+ daddr),
+ 4, &hdata);
break;
case htons(ETH_P_IPV6):
- if (pskb_network_may_pull(skb, sizeof(struct ipv6hdr)))
- return ntohl(ipv6_hdr(skb)->daddr.s6_addr32[3]);
+ data = skb_header_pointer(skb,
+ nhoff + offsetof(struct ipv6hdr,
+ daddr.s6_addr32[3]),
+ 4, &hdata);
break;
}
+ if (data)
+ return ntohl(*data);
return addr_fold(skb_dst(skb)) ^ (__force u16)skb->protocol;
}
-static u32 flow_get_proto(struct sk_buff *skb)
+static u32 flow_get_proto(const struct sk_buff *skb, int nhoff)
{
+ __u8 *data = NULL, hdata;
+
switch (skb->protocol) {
case htons(ETH_P_IP):
- return pskb_network_may_pull(skb, sizeof(struct iphdr)) ?
- ip_hdr(skb)->protocol : 0;
+ data = skb_header_pointer(skb,
+ nhoff + offsetof(struct iphdr,
+ protocol),
+ 1, &hdata);
+ break;
case htons(ETH_P_IPV6):
- return pskb_network_may_pull(skb, sizeof(struct ipv6hdr)) ?
- ipv6_hdr(skb)->nexthdr : 0;
- default:
- return 0;
+ data = skb_header_pointer(skb,
+ nhoff + offsetof(struct ipv6hdr,
+ nexthdr),
+ 1, &hdata);
+ break;
}
+ if (data)
+ return *data;
+ return 0;
}
-static u32 flow_get_proto_src(struct sk_buff *skb)
+/* helper function to get either src or dst port */
+static __be16 *flow_get_proto_common(const struct sk_buff *skb, int nhoff,
+ __be16 *_port, int dst)
{
+ __be16 *port = NULL;
+ int poff;
+
switch (skb->protocol) {
case htons(ETH_P_IP): {
- struct iphdr *iph;
- int poff;
+ struct iphdr *iph, _iph;
- if (!pskb_network_may_pull(skb, sizeof(*iph)))
+ iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph);
+ if (!iph)
break;
- iph = ip_hdr(skb);
if (ip_is_fragment(iph))
break;
poff = proto_ports_offset(iph->protocol);
- if (poff >= 0 &&
- pskb_network_may_pull(skb, iph->ihl * 4 + 2 + poff)) {
- iph = ip_hdr(skb);
- return ntohs(*(__be16 *)((void *)iph + iph->ihl * 4 +
- poff));
- }
+ if (poff >= 0)
+ port = skb_header_pointer(skb,
+ nhoff + iph->ihl * 4 + poff + dst,
+ sizeof(*_port), _port);
break;
}
case htons(ETH_P_IPV6): {
- struct ipv6hdr *iph;
- int poff;
+ struct ipv6hdr *iph, _iph;
- if (!pskb_network_may_pull(skb, sizeof(*iph)))
+ iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph);
+ if (!iph)
break;
- iph = ipv6_hdr(skb);
poff = proto_ports_offset(iph->nexthdr);
- if (poff >= 0 &&
- pskb_network_may_pull(skb, sizeof(*iph) + poff + 2)) {
- iph = ipv6_hdr(skb);
- return ntohs(*(__be16 *)((void *)iph + sizeof(*iph) +
- poff));
- }
+ if (poff >= 0)
+ port = skb_header_pointer(skb,
+ nhoff + sizeof(*iph) + poff + dst,
+ sizeof(*_port), _port);
break;
}
}
- return addr_fold(skb->sk);
+ return port;
}
-static u32 flow_get_proto_dst(struct sk_buff *skb)
+static u32 flow_get_proto_src(const struct sk_buff *skb, int nhoff)
{
- switch (skb->protocol) {
- case htons(ETH_P_IP): {
- struct iphdr *iph;
- int poff;
+ __be16 _port, *port = flow_get_proto_common(skb, nhoff, &_port, 0);
- if (!pskb_network_may_pull(skb, sizeof(*iph)))
- break;
- iph = ip_hdr(skb);
- if (ip_is_fragment(iph))
- break;
- poff = proto_ports_offset(iph->protocol);
- if (poff >= 0 &&
- pskb_network_may_pull(skb, iph->ihl * 4 + 4 + poff)) {
- iph = ip_hdr(skb);
- return ntohs(*(__be16 *)((void *)iph + iph->ihl * 4 +
- 2 + poff));
- }
- break;
- }
- case htons(ETH_P_IPV6): {
- struct ipv6hdr *iph;
- int poff;
+ if (port)
+ return ntohs(*port);
- if (!pskb_network_may_pull(skb, sizeof(*iph)))
- break;
- iph = ipv6_hdr(skb);
- poff = proto_ports_offset(iph->nexthdr);
- if (poff >= 0 &&
- pskb_network_may_pull(skb, sizeof(*iph) + poff + 4)) {
- iph = ipv6_hdr(skb);
- return ntohs(*(__be16 *)((void *)iph + sizeof(*iph) +
- poff + 2));
- }
- break;
- }
- }
+ return addr_fold(skb->sk);
+}
+
+static u32 flow_get_proto_dst(const struct sk_buff *skb, int nhoff)
+{
+ __be16 _port, *port = flow_get_proto_common(skb, nhoff, &_port, 2);
+
+ if (port)
+ return ntohs(*port);
return addr_fold(skb_dst(skb)) ^ (__force u16)skb->protocol;
}
@@ -223,7 +225,7 @@ static u32 flow_get_nfct(const struct sk_buff *skb)
#define CTTUPLE(skb, member) \
({ \
enum ip_conntrack_info ctinfo; \
- struct nf_conn *ct = nf_ct_get(skb, &ctinfo); \
+ const struct nf_conn *ct = nf_ct_get(skb, &ctinfo); \
if (ct == NULL) \
goto fallback; \
ct->tuplehash[CTINFO2DIR(ctinfo)].tuple.member; \
@@ -236,7 +238,7 @@ static u32 flow_get_nfct(const struct sk_buff *skb)
})
#endif
-static u32 flow_get_nfct_src(struct sk_buff *skb)
+static u32 flow_get_nfct_src(const struct sk_buff *skb, int nhoff)
{
switch (skb->protocol) {
case htons(ETH_P_IP):
@@ -245,10 +247,10 @@ static u32 flow_get_nfct_src(struct sk_buff *skb)
return ntohl(CTTUPLE(skb, src.u3.ip6[3]));
}
fallback:
- return flow_get_src(skb);
+ return flow_get_src(skb, nhoff);
}
-static u32 flow_get_nfct_dst(struct sk_buff *skb)
+static u32 flow_get_nfct_dst(const struct sk_buff *skb, int nhoff)
{
switch (skb->protocol) {
case htons(ETH_P_IP):
@@ -257,21 +259,21 @@ static u32 flow_get_nfct_dst(struct sk_buff *skb)
return ntohl(CTTUPLE(skb, dst.u3.ip6[3]));
}
fallback:
- return flow_get_dst(skb);
+ return flow_get_dst(skb, nhoff);
}
-static u32 flow_get_nfct_proto_src(struct sk_buff *skb)
+static u32 flow_get_nfct_proto_src(const struct sk_buff *skb, int nhoff)
{
return ntohs(CTTUPLE(skb, src.u.all));
fallback:
- return flow_get_proto_src(skb);
+ return flow_get_proto_src(skb, nhoff);
}
-static u32 flow_get_nfct_proto_dst(struct sk_buff *skb)
+static u32 flow_get_nfct_proto_dst(const struct sk_buff *skb, int nhoff)
{
return ntohs(CTTUPLE(skb, dst.u.all));
fallback:
- return flow_get_proto_dst(skb);
+ return flow_get_proto_dst(skb, nhoff);
}
static u32 flow_get_rtclassid(const struct sk_buff *skb)
@@ -313,17 +315,19 @@ static u32 flow_get_rxhash(struct sk_buff *skb)
static u32 flow_key_get(struct sk_buff *skb, int key)
{
+ int nhoff = skb_network_offset(skb);
+
switch (key) {
case FLOW_KEY_SRC:
- return flow_get_src(skb);
+ return flow_get_src(skb, nhoff);
case FLOW_KEY_DST:
- return flow_get_dst(skb);
+ return flow_get_dst(skb, nhoff);
case FLOW_KEY_PROTO:
- return flow_get_proto(skb);
+ return flow_get_proto(skb, nhoff);
case FLOW_KEY_PROTO_SRC:
- return flow_get_proto_src(skb);
+ return flow_get_proto_src(skb, nhoff);
case FLOW_KEY_PROTO_DST:
- return flow_get_proto_dst(skb);
+ return flow_get_proto_dst(skb, nhoff);
case FLOW_KEY_IIF:
return flow_get_iif(skb);
case FLOW_KEY_PRIORITY:
@@ -333,13 +337,13 @@ static u32 flow_key_get(struct sk_buff *skb, int key)
case FLOW_KEY_NFCT:
return flow_get_nfct(skb);
case FLOW_KEY_NFCT_SRC:
- return flow_get_nfct_src(skb);
+ return flow_get_nfct_src(skb, nhoff);
case FLOW_KEY_NFCT_DST:
- return flow_get_nfct_dst(skb);
+ return flow_get_nfct_dst(skb, nhoff);
case FLOW_KEY_NFCT_PROTO_SRC:
- return flow_get_nfct_proto_src(skb);
+ return flow_get_nfct_proto_src(skb, nhoff);
case FLOW_KEY_NFCT_PROTO_DST:
- return flow_get_nfct_proto_dst(skb);
+ return flow_get_nfct_proto_dst(skb, nhoff);
case FLOW_KEY_RTCLASSID:
return flow_get_rtclassid(skb);
case FLOW_KEY_SKUID:
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-06 00:16:03 +0000