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-rw-r--r--include/net/gro.h1
-rw-r--r--include/net/tcp.h5
-rw-r--r--net/core/gro.c27
-rw-r--r--net/ipv4/tcp_offload.c214
-rw-r--r--net/ipv4/udp_offload.c27
-rw-r--r--net/ipv6/tcpv6_offload.c120
6 files changed, 325 insertions, 69 deletions
diff --git a/include/net/gro.h b/include/net/gro.h
index c1d4ca0463a1..5df8bf318197 100644
--- a/include/net/gro.h
+++ b/include/net/gro.h
@@ -438,6 +438,7 @@ static inline __wsum ip6_gro_compute_pseudo(const struct sk_buff *skb,
}
int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
+int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
/* Pass the currently batched GRO_NORMAL SKBs up to the stack. */
static inline void gro_normal_list(struct napi_struct *napi)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 0a51e6a45bce..8f63a163c7de 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -2191,7 +2191,10 @@ void tcp_v4_destroy_sock(struct sock *sk);
struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
netdev_features_t features);
-struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb);
+struct tcphdr *tcp_gro_pull_header(struct sk_buff *skb);
+struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th);
+struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb,
+ struct tcphdr *th);
INDIRECT_CALLABLE_DECLARE(int tcp4_gro_complete(struct sk_buff *skb, int thoff));
INDIRECT_CALLABLE_DECLARE(struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb));
INDIRECT_CALLABLE_DECLARE(int tcp6_gro_complete(struct sk_buff *skb, int thoff));
diff --git a/net/core/gro.c b/net/core/gro.c
index 99a45a5211c9..e2f84947fb74 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -231,6 +231,33 @@ done:
return 0;
}
+int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
+{
+ if (unlikely(p->len + skb->len >= 65536))
+ return -E2BIG;
+
+ if (NAPI_GRO_CB(p)->last == p)
+ skb_shinfo(p)->frag_list = skb;
+ else
+ NAPI_GRO_CB(p)->last->next = skb;
+
+ skb_pull(skb, skb_gro_offset(skb));
+
+ NAPI_GRO_CB(p)->last = skb;
+ NAPI_GRO_CB(p)->count++;
+ p->data_len += skb->len;
+
+ /* sk ownership - if any - completely transferred to the aggregated packet */
+ skb->destructor = NULL;
+ skb->sk = NULL;
+ p->truesize += skb->truesize;
+ p->len += skb->len;
+
+ NAPI_GRO_CB(skb)->same_flow = 1;
+
+ return 0;
+}
+
static void napi_gro_complete(struct napi_struct *napi, struct sk_buff *skb)
{
diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c
index fab0973f995b..c90704befd7b 100644
--- a/net/ipv4/tcp_offload.c
+++ b/net/ipv4/tcp_offload.c
@@ -28,6 +28,70 @@ static void tcp_gso_tstamp(struct sk_buff *skb, unsigned int ts_seq,
}
}
+static void __tcpv4_gso_segment_csum(struct sk_buff *seg,
+ __be32 *oldip, __be32 newip,
+ __be16 *oldport, __be16 newport)
+{
+ struct tcphdr *th;
+ struct iphdr *iph;
+
+ if (*oldip == newip && *oldport == newport)
+ return;
+
+ th = tcp_hdr(seg);
+ iph = ip_hdr(seg);
+
+ inet_proto_csum_replace4(&th->check, seg, *oldip, newip, true);
+ inet_proto_csum_replace2(&th->check, seg, *oldport, newport, false);
+ *oldport = newport;
+
+ csum_replace4(&iph->check, *oldip, newip);
+ *oldip = newip;
+}
+
+static struct sk_buff *__tcpv4_gso_segment_list_csum(struct sk_buff *segs)
+{
+ const struct tcphdr *th;
+ const struct iphdr *iph;
+ struct sk_buff *seg;
+ struct tcphdr *th2;
+ struct iphdr *iph2;
+
+ seg = segs;
+ th = tcp_hdr(seg);
+ iph = ip_hdr(seg);
+ th2 = tcp_hdr(seg->next);
+ iph2 = ip_hdr(seg->next);
+
+ if (!(*(const u32 *)&th->source ^ *(const u32 *)&th2->source) &&
+ iph->daddr == iph2->daddr && iph->saddr == iph2->saddr)
+ return segs;
+
+ while ((seg = seg->next)) {
+ th2 = tcp_hdr(seg);
+ iph2 = ip_hdr(seg);
+
+ __tcpv4_gso_segment_csum(seg,
+ &iph2->saddr, iph->saddr,
+ &th2->source, th->source);
+ __tcpv4_gso_segment_csum(seg,
+ &iph2->daddr, iph->daddr,
+ &th2->dest, th->dest);
+ }
+
+ return segs;
+}
+
+static struct sk_buff *__tcp4_gso_segment_list(struct sk_buff *skb,
+ netdev_features_t features)
+{
+ skb = skb_segment_list(skb, features, skb_mac_header_len(skb));
+ if (IS_ERR(skb))
+ return skb;
+
+ return __tcpv4_gso_segment_list_csum(skb);
+}
+
static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
@@ -37,6 +101,9 @@ static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
return ERR_PTR(-EINVAL);
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
+ return __tcp4_gso_segment_list(skb, features);
+
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
const struct iphdr *iph = ip_hdr(skb);
struct tcphdr *th = tcp_hdr(skb);
@@ -178,61 +245,76 @@ out:
return segs;
}
-struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb)
+struct sk_buff *tcp_gro_lookup(struct list_head *head, struct tcphdr *th)
{
- struct sk_buff *pp = NULL;
+ struct tcphdr *th2;
struct sk_buff *p;
+
+ list_for_each_entry(p, head, list) {
+ if (!NAPI_GRO_CB(p)->same_flow)
+ continue;
+
+ th2 = tcp_hdr(p);
+ if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
+ NAPI_GRO_CB(p)->same_flow = 0;
+ continue;
+ }
+
+ return p;
+ }
+
+ return NULL;
+}
+
+struct tcphdr *tcp_gro_pull_header(struct sk_buff *skb)
+{
+ unsigned int thlen, hlen, off;
struct tcphdr *th;
- struct tcphdr *th2;
- unsigned int len;
- unsigned int thlen;
- __be32 flags;
- unsigned int mss = 1;
- unsigned int hlen;
- unsigned int off;
- int flush = 1;
- int i;
off = skb_gro_offset(skb);
hlen = off + sizeof(*th);
th = skb_gro_header(skb, hlen, off);
if (unlikely(!th))
- goto out;
+ return NULL;
thlen = th->doff * 4;
if (thlen < sizeof(*th))
- goto out;
+ return NULL;
hlen = off + thlen;
if (!skb_gro_may_pull(skb, hlen)) {
th = skb_gro_header_slow(skb, hlen, off);
if (unlikely(!th))
- goto out;
+ return NULL;
}
skb_gro_pull(skb, thlen);
- len = skb_gro_len(skb);
- flags = tcp_flag_word(th);
-
- list_for_each_entry(p, head, list) {
- if (!NAPI_GRO_CB(p)->same_flow)
- continue;
+ return th;
+}
- th2 = tcp_hdr(p);
+struct sk_buff *tcp_gro_receive(struct list_head *head, struct sk_buff *skb,
+ struct tcphdr *th)
+{
+ unsigned int thlen = th->doff * 4;
+ struct sk_buff *pp = NULL;
+ struct sk_buff *p;
+ struct tcphdr *th2;
+ unsigned int len;
+ __be32 flags;
+ unsigned int mss = 1;
+ int flush = 1;
+ int i;
- if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
- NAPI_GRO_CB(p)->same_flow = 0;
- continue;
- }
+ len = skb_gro_len(skb);
+ flags = tcp_flag_word(th);
- goto found;
- }
- p = NULL;
- goto out_check_final;
+ p = tcp_gro_lookup(head, th);
+ if (!p)
+ goto out_check_final;
-found:
/* Include the IP ID check below from the inner most IP hdr */
+ th2 = tcp_hdr(p);
flush = NAPI_GRO_CB(p)->flush;
flush |= (__force int)(flags & TCP_FLAG_CWR);
flush |= (__force int)((flags ^ tcp_flag_word(th2)) &
@@ -267,6 +349,18 @@ found:
flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq);
flush |= skb_cmp_decrypted(p, skb);
+ if (unlikely(NAPI_GRO_CB(p)->is_flist)) {
+ flush |= (__force int)(flags ^ tcp_flag_word(th2));
+ flush |= skb->ip_summed != p->ip_summed;
+ flush |= skb->csum_level != p->csum_level;
+ flush |= NAPI_GRO_CB(p)->count >= 64;
+
+ if (flush || skb_gro_receive_list(p, skb))
+ mss = 1;
+
+ goto out_check_final;
+ }
+
if (flush || skb_gro_receive(p, skb)) {
mss = 1;
goto out_check_final;
@@ -288,7 +382,6 @@ out_check_final:
if (p && (!NAPI_GRO_CB(skb)->same_flow || flush))
pp = p;
-out:
NAPI_GRO_CB(skb)->flush |= (flush != 0);
return pp;
@@ -314,18 +407,58 @@ void tcp_gro_complete(struct sk_buff *skb)
}
EXPORT_SYMBOL(tcp_gro_complete);
+static void tcp4_check_fraglist_gro(struct list_head *head, struct sk_buff *skb,
+ struct tcphdr *th)
+{
+ const struct iphdr *iph;
+ struct sk_buff *p;
+ struct sock *sk;
+ struct net *net;
+ int iif, sdif;
+
+ if (likely(!(skb->dev->features & NETIF_F_GRO_FRAGLIST)))
+ return;
+
+ p = tcp_gro_lookup(head, th);
+ if (p) {
+ NAPI_GRO_CB(skb)->is_flist = NAPI_GRO_CB(p)->is_flist;
+ return;
+ }
+
+ inet_get_iif_sdif(skb, &iif, &sdif);
+ iph = skb_gro_network_header(skb);
+ net = dev_net(skb->dev);
+ sk = __inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
+ iph->saddr, th->source,
+ iph->daddr, ntohs(th->dest),
+ iif, sdif);
+ NAPI_GRO_CB(skb)->is_flist = !sk;
+ if (sk)
+ sock_put(sk);
+}
+
INDIRECT_CALLABLE_SCOPE
struct sk_buff *tcp4_gro_receive(struct list_head *head, struct sk_buff *skb)
{
+ struct tcphdr *th;
+
/* Don't bother verifying checksum if we're going to flush anyway. */
if (!NAPI_GRO_CB(skb)->flush &&
skb_gro_checksum_validate(skb, IPPROTO_TCP,
- inet_gro_compute_pseudo)) {
- NAPI_GRO_CB(skb)->flush = 1;
- return NULL;
- }
+ inet_gro_compute_pseudo))
+ goto flush;
+
+ th = tcp_gro_pull_header(skb);
+ if (!th)
+ goto flush;
- return tcp_gro_receive(head, skb);
+ tcp4_check_fraglist_gro(head, skb, th);
+
+ return tcp_gro_receive(head, skb, th);
+
+flush:
+ NAPI_GRO_CB(skb)->flush = 1;
+ return NULL;
}
INDIRECT_CALLABLE_SCOPE int tcp4_gro_complete(struct sk_buff *skb, int thoff)
@@ -333,6 +466,15 @@ INDIRECT_CALLABLE_SCOPE int tcp4_gro_complete(struct sk_buff *skb, int thoff)
const struct iphdr *iph = ip_hdr(skb);
struct tcphdr *th = tcp_hdr(skb);
+ if (unlikely(NAPI_GRO_CB(skb)->is_flist)) {
+ skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV4;
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
+
+ __skb_incr_checksum_unnecessary(skb);
+
+ return 0;
+ }
+
th->check = ~tcp_v4_check(skb->len - thoff, iph->saddr,
iph->daddr, 0);
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index 8721fe5beca2..f6d3c442e260 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -433,33 +433,6 @@ out:
return segs;
}
-static int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
-{
- if (unlikely(p->len + skb->len >= 65536))
- return -E2BIG;
-
- if (NAPI_GRO_CB(p)->last == p)
- skb_shinfo(p)->frag_list = skb;
- else
- NAPI_GRO_CB(p)->last->next = skb;
-
- skb_pull(skb, skb_gro_offset(skb));
-
- NAPI_GRO_CB(p)->last = skb;
- NAPI_GRO_CB(p)->count++;
- p->data_len += skb->len;
-
- /* sk ownership - if any - completely transferred to the aggregated packet */
- skb->destructor = NULL;
- skb->sk = NULL;
- p->truesize += skb->truesize;
- p->len += skb->len;
-
- NAPI_GRO_CB(skb)->same_flow = 1;
-
- return 0;
-}
-
#define UDP_GRO_CNT_MAX 64
static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
diff --git a/net/ipv6/tcpv6_offload.c b/net/ipv6/tcpv6_offload.c
index 4b07d1e6c952..d59f58cbd306 100644
--- a/net/ipv6/tcpv6_offload.c
+++ b/net/ipv6/tcpv6_offload.c
@@ -7,24 +7,67 @@
*/
#include <linux/indirect_call_wrapper.h>
#include <linux/skbuff.h>
+#include <net/inet6_hashtables.h>
#include <net/gro.h>
#include <net/protocol.h>
#include <net/tcp.h>
#include <net/ip6_checksum.h>
#include "ip6_offload.h"
+static void tcp6_check_fraglist_gro(struct list_head *head, struct sk_buff *skb,
+ struct tcphdr *th)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ const struct ipv6hdr *hdr;
+ struct sk_buff *p;
+ struct sock *sk;
+ struct net *net;
+ int iif, sdif;
+
+ if (likely(!(skb->dev->features & NETIF_F_GRO_FRAGLIST)))
+ return;
+
+ p = tcp_gro_lookup(head, th);
+ if (p) {
+ NAPI_GRO_CB(skb)->is_flist = NAPI_GRO_CB(p)->is_flist;
+ return;
+ }
+
+ inet6_get_iif_sdif(skb, &iif, &sdif);
+ hdr = skb_gro_network_header(skb);
+ net = dev_net(skb->dev);
+ sk = __inet6_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
+ &hdr->saddr, th->source,
+ &hdr->daddr, ntohs(th->dest),
+ iif, sdif);
+ NAPI_GRO_CB(skb)->is_flist = !sk;
+ if (sk)
+ sock_put(sk);
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+}
+
INDIRECT_CALLABLE_SCOPE
struct sk_buff *tcp6_gro_receive(struct list_head *head, struct sk_buff *skb)
{
+ struct tcphdr *th;
+
/* Don't bother verifying checksum if we're going to flush anyway. */
if (!NAPI_GRO_CB(skb)->flush &&
skb_gro_checksum_validate(skb, IPPROTO_TCP,
- ip6_gro_compute_pseudo)) {
- NAPI_GRO_CB(skb)->flush = 1;
- return NULL;
- }
+ ip6_gro_compute_pseudo))
+ goto flush;
- return tcp_gro_receive(head, skb);
+ th = tcp_gro_pull_header(skb);
+ if (!th)
+ goto flush;
+
+ tcp6_check_fraglist_gro(head, skb, th);
+
+ return tcp_gro_receive(head, skb, th);
+
+flush:
+ NAPI_GRO_CB(skb)->flush = 1;
+ return NULL;
}
INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff)
@@ -32,6 +75,15 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff)
const struct ipv6hdr *iph = ipv6_hdr(skb);
struct tcphdr *th = tcp_hdr(skb);
+ if (unlikely(NAPI_GRO_CB(skb)->is_flist)) {
+ skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV6;
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
+
+ __skb_incr_checksum_unnecessary(skb);
+
+ return 0;
+ }
+
th->check = ~tcp_v6_check(skb->len - thoff, &iph->saddr,
&iph->daddr, 0);
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6;
@@ -40,6 +92,61 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff)
return 0;
}
+static void __tcpv6_gso_segment_csum(struct sk_buff *seg,
+ __be16 *oldport, __be16 newport)
+{
+ struct tcphdr *th;
+
+ if (*oldport == newport)
+ return;
+
+ th = tcp_hdr(seg);
+ inet_proto_csum_replace2(&th->check, seg, *oldport, newport, false);
+ *oldport = newport;
+}
+
+static struct sk_buff *__tcpv6_gso_segment_list_csum(struct sk_buff *segs)
+{
+ const struct tcphdr *th;
+ const struct ipv6hdr *iph;
+ struct sk_buff *seg;
+ struct tcphdr *th2;
+ struct ipv6hdr *iph2;
+
+ seg = segs;
+ th = tcp_hdr(seg);
+ iph = ipv6_hdr(seg);
+ th2 = tcp_hdr(seg->next);
+ iph2 = ipv6_hdr(seg->next);
+
+ if (!(*(const u32 *)&th->source ^ *(const u32 *)&th2->source) &&
+ ipv6_addr_equal(&iph->saddr, &iph2->saddr) &&
+ ipv6_addr_equal(&iph->daddr, &iph2->daddr))
+ return segs;
+
+ while ((seg = seg->next)) {
+ th2 = tcp_hdr(seg);
+ iph2 = ipv6_hdr(seg);
+
+ iph2->saddr = iph->saddr;
+ iph2->daddr = iph->daddr;
+ __tcpv6_gso_segment_csum(seg, &th2->source, th->source);
+ __tcpv6_gso_segment_csum(seg, &th2->dest, th->dest);
+ }
+
+ return segs;
+}
+
+static struct sk_buff *__tcp6_gso_segment_list(struct sk_buff *skb,
+ netdev_features_t features)
+{
+ skb = skb_segment_list(skb, features, skb_mac_header_len(skb));
+ if (IS_ERR(skb))
+ return skb;
+
+ return __tcpv6_gso_segment_list_csum(skb);
+}
+
static struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
@@ -51,6 +158,9 @@ static struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
if (!pskb_may_pull(skb, sizeof(*th)))
return ERR_PTR(-EINVAL);
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
+ return __tcp6_gso_segment_list(skb, features);
+
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
struct tcphdr *th = tcp_hdr(skb);
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-26 23:37:56 +0300