Contributors: 18
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Marcelo Ricardo Leitner |
313 |
68.49% |
3 |
8.33% |
| Xin Long |
36 |
7.88% |
4 |
11.11% |
| Linus Torvalds (pre-git) |
25 |
5.47% |
11 |
30.56% |
| Jon Grimm |
25 |
5.47% |
2 |
5.56% |
| Davide Caratti |
10 |
2.19% |
2 |
5.56% |
| Willem de Bruijn |
10 |
2.19% |
1 |
2.78% |
| Joe Perches |
7 |
1.53% |
1 |
2.78% |
| Jiri Pirko |
6 |
1.31% |
1 |
2.78% |
| David S. Miller |
5 |
1.09% |
2 |
5.56% |
| Eric Dumazet |
3 |
0.66% |
1 |
2.78% |
| Arnaldo Carvalho de Melo |
3 |
0.66% |
1 |
2.78% |
| Eric W. Biedermann |
3 |
0.66% |
1 |
2.78% |
| Andy King |
3 |
0.66% |
1 |
2.78% |
| Herbert Xu |
2 |
0.44% |
1 |
2.78% |
| Linus Torvalds |
2 |
0.44% |
1 |
2.78% |
| Thomas Gleixner |
2 |
0.44% |
1 |
2.78% |
| Daniel Axtens |
1 |
0.22% |
1 |
2.78% |
| Matteo Croce |
1 |
0.22% |
1 |
2.78% |
| Total |
457 |
|
36 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* sctp_offload - GRO/GSO Offloading for SCTP
*
* Copyright (C) 2015, Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/kprobes.h>
#include <linux/socket.h>
#include <linux/sctp.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/kfifo.h>
#include <linux/time.h>
#include <net/net_namespace.h>
#include <linux/skbuff.h>
#include <net/sctp/sctp.h>
#include <net/sctp/checksum.h>
#include <net/protocol.h>
#include <net/gso.h>
static __le32 sctp_gso_make_checksum(struct sk_buff *skb)
{
skb->ip_summed = CHECKSUM_NONE;
skb->csum_not_inet = 0;
/* csum and csum_start in GSO CB may be needed to do the UDP
* checksum when it's a UDP tunneling packet.
*/
SKB_GSO_CB(skb)->csum = (__force __wsum)~0;
SKB_GSO_CB(skb)->csum_start = skb_headroom(skb) + skb->len;
return sctp_compute_cksum(skb, skb_transport_offset(skb));
}
static struct sk_buff *sctp_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
struct sk_buff *segs = ERR_PTR(-EINVAL);
struct sctphdr *sh;
if (!skb_is_gso_sctp(skb))
goto out;
sh = sctp_hdr(skb);
if (!pskb_may_pull(skb, sizeof(*sh)))
goto out;
__skb_pull(skb, sizeof(*sh));
if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
/* Packet is from an untrusted source, reset gso_segs. */
struct skb_shared_info *pinfo = skb_shinfo(skb);
struct sk_buff *frag_iter;
pinfo->gso_segs = 0;
if (skb->len != skb->data_len) {
/* Means we have chunks in here too */
pinfo->gso_segs++;
}
skb_walk_frags(skb, frag_iter)
pinfo->gso_segs++;
segs = NULL;
goto out;
}
segs = skb_segment(skb, (features | NETIF_F_HW_CSUM) & ~NETIF_F_SG);
if (IS_ERR(segs))
goto out;
/* All that is left is update SCTP CRC if necessary */
if (!(features & NETIF_F_SCTP_CRC)) {
for (skb = segs; skb; skb = skb->next) {
if (skb->ip_summed == CHECKSUM_PARTIAL) {
sh = sctp_hdr(skb);
sh->checksum = sctp_gso_make_checksum(skb);
}
}
}
out:
return segs;
}
static const struct net_offload sctp_offload = {
.callbacks = {
.gso_segment = sctp_gso_segment,
},
};
static const struct net_offload sctp6_offload = {
.callbacks = {
.gso_segment = sctp_gso_segment,
},
};
int __init sctp_offload_init(void)
{
int ret;
ret = inet_add_offload(&sctp_offload, IPPROTO_SCTP);
if (ret)
goto out;
ret = inet6_add_offload(&sctp6_offload, IPPROTO_SCTP);
if (ret)
goto ipv4;
crc32c_csum_stub = &sctp_csum_ops;
return ret;
ipv4:
inet_del_offload(&sctp_offload, IPPROTO_SCTP);
out:
return ret;
}