^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Checksum updating actions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2010 Gregoire Baron <baronchon@n7mm.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <net/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <net/icmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/icmpv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/igmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <net/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <net/udp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <net/ip6_checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <net/sctp/checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <net/act_api.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <net/pkt_cls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/tc_act/tc_csum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <net/tc_act/tc_csum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static const struct nla_policy csum_policy[TCA_CSUM_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) [TCA_CSUM_PARMS] = { .len = sizeof(struct tc_csum), },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static unsigned int csum_net_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static struct tc_action_ops act_csum_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int tcf_csum_init(struct net *net, struct nlattr *nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct nlattr *est, struct tc_action **a, int ovr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int bind, bool rtnl_held, struct tcf_proto *tp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u32 flags, struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct tc_action_net *tn = net_generic(net, csum_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct tcf_csum_params *params_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct nlattr *tb[TCA_CSUM_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct tcf_chain *goto_ch = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct tc_csum *parm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct tcf_csum *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int ret = 0, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) u32 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (nla == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) err = nla_parse_nested_deprecated(tb, TCA_CSUM_MAX, nla, csum_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (tb[TCA_CSUM_PARMS] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) parm = nla_data(tb[TCA_CSUM_PARMS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) index = parm->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) err = tcf_idr_check_alloc(tn, &index, a, bind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret = tcf_idr_create_from_flags(tn, index, est, a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) &act_csum_ops, bind, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) tcf_idr_cleanup(tn, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = ACT_P_CREATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } else if (err > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (bind)/* dont override defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (!ovr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) tcf_idr_release(*a, bind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) goto release_idr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) p = to_tcf_csum(*a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (unlikely(!params_new)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) goto put_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) params_new->update_flags = parm->update_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) spin_lock_bh(&p->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) params_new = rcu_replace_pointer(p->params, params_new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) lockdep_is_held(&p->tcf_lock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) spin_unlock_bh(&p->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (goto_ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) tcf_chain_put_by_act(goto_ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (params_new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) kfree_rcu(params_new, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) put_chain:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (goto_ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) tcf_chain_put_by_act(goto_ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) release_idr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) tcf_idr_release(*a, bind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * tcf_csum_skb_nextlayer - Get next layer pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * @skb: sk_buff to use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * @ihl: previous summed headers length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * @ipl: complete packet length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * @jhl: next header length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * Check the expected next layer availability in the specified sk_buff.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * Return the next layer pointer if pass, NULL otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static void *tcf_csum_skb_nextlayer(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned int ihl, unsigned int ipl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) unsigned int jhl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) int ntkoff = skb_network_offset(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int hl = ihl + jhl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (!pskb_may_pull(skb, ipl + ntkoff) || (ipl < hl) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) skb_try_make_writable(skb, hl + ntkoff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return (void *)(skb_network_header(skb) + ihl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int tcf_csum_ipv4_icmp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) unsigned int ipl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct icmphdr *icmph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) icmph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*icmph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (icmph == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) icmph->checksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) skb->csum = csum_partial(icmph, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) icmph->checksum = csum_fold(skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int tcf_csum_ipv4_igmp(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) unsigned int ihl, unsigned int ipl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct igmphdr *igmph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) igmph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*igmph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (igmph == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) igmph->csum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) skb->csum = csum_partial(igmph, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) igmph->csum = csum_fold(skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static int tcf_csum_ipv6_icmp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) unsigned int ipl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct icmp6hdr *icmp6h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) const struct ipv6hdr *ip6h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) icmp6h = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*icmp6h));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (icmp6h == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) ip6h = ipv6_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) icmp6h->icmp6_cksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) skb->csum = csum_partial(icmp6h, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) icmp6h->icmp6_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) ipl - ihl, IPPROTO_ICMPV6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int tcf_csum_ipv4_tcp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) unsigned int ipl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct tcphdr *tcph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) const struct iphdr *iph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) tcph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*tcph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (tcph == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) iph = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) tcph->check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) skb->csum = csum_partial(tcph, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) tcph->check = tcp_v4_check(ipl - ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) iph->saddr, iph->daddr, skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static int tcf_csum_ipv6_tcp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) unsigned int ipl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct tcphdr *tcph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) const struct ipv6hdr *ip6h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) tcph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*tcph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (tcph == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) ip6h = ipv6_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) tcph->check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) skb->csum = csum_partial(tcph, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) tcph->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) ipl - ihl, IPPROTO_TCP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static int tcf_csum_ipv4_udp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) unsigned int ipl, int udplite)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) struct udphdr *udph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) const struct iphdr *iph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) u16 ul;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * Support both UDP and UDPLITE checksum algorithms, Don't use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * udph->len to get the real length without any protocol check,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * UDPLITE uses udph->len for another thing,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * Use iph->tot_len, or just ipl.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) udph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*udph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (udph == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) iph = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) ul = ntohs(udph->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (udplite || udph->check) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) udph->check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (udplite) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (ul == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) skb->csum = csum_partial(udph, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) else if ((ul >= sizeof(*udph)) && (ul <= ipl - ihl))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) skb->csum = csum_partial(udph, ul, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) goto ignore_obscure_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (ul != ipl - ihl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) goto ignore_obscure_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) skb->csum = csum_partial(udph, ul, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) ul, iph->protocol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (!udph->check)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) udph->check = CSUM_MANGLED_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) ignore_obscure_skb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static int tcf_csum_ipv6_udp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) unsigned int ipl, int udplite)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct udphdr *udph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) const struct ipv6hdr *ip6h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) u16 ul;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * Support both UDP and UDPLITE checksum algorithms, Don't use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * udph->len to get the real length without any protocol check,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * UDPLITE uses udph->len for another thing,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * Use ip6h->payload_len + sizeof(*ip6h) ... , or just ipl.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) udph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*udph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (udph == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) ip6h = ipv6_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ul = ntohs(udph->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) udph->check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (udplite) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (ul == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) skb->csum = csum_partial(udph, ipl - ihl, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) else if ((ul >= sizeof(*udph)) && (ul <= ipl - ihl))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) skb->csum = csum_partial(udph, ul, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) goto ignore_obscure_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (ul != ipl - ihl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) goto ignore_obscure_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) skb->csum = csum_partial(udph, ul, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) udph->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, ul,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) udplite ? IPPROTO_UDPLITE : IPPROTO_UDP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) skb->csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (!udph->check)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) udph->check = CSUM_MANGLED_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ignore_obscure_skb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static int tcf_csum_sctp(struct sk_buff *skb, unsigned int ihl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) unsigned int ipl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct sctphdr *sctph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (skb_is_gso(skb) && skb_is_gso_sctp(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) sctph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*sctph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!sctph)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) sctph->checksum = sctp_compute_cksum(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) skb_network_offset(skb) + ihl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) skb->ip_summed = CHECKSUM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) skb->csum_not_inet = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) static int tcf_csum_ipv4(struct sk_buff *skb, u32 update_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) const struct iphdr *iph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int ntkoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) ntkoff = skb_network_offset(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (!pskb_may_pull(skb, sizeof(*iph) + ntkoff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) iph = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) switch (iph->frag_off & htons(IP_OFFSET) ? 0 : iph->protocol) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) case IPPROTO_ICMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (update_flags & TCA_CSUM_UPDATE_FLAG_ICMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (!tcf_csum_ipv4_icmp(skb, iph->ihl * 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) ntohs(iph->tot_len)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) case IPPROTO_IGMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (update_flags & TCA_CSUM_UPDATE_FLAG_IGMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (!tcf_csum_ipv4_igmp(skb, iph->ihl * 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) ntohs(iph->tot_len)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) case IPPROTO_TCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (update_flags & TCA_CSUM_UPDATE_FLAG_TCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (!tcf_csum_ipv4_tcp(skb, iph->ihl * 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ntohs(iph->tot_len)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) case IPPROTO_UDP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (update_flags & TCA_CSUM_UPDATE_FLAG_UDP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (!tcf_csum_ipv4_udp(skb, iph->ihl * 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) ntohs(iph->tot_len), 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) case IPPROTO_UDPLITE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (update_flags & TCA_CSUM_UPDATE_FLAG_UDPLITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (!tcf_csum_ipv4_udp(skb, iph->ihl * 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) ntohs(iph->tot_len), 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) case IPPROTO_SCTP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if ((update_flags & TCA_CSUM_UPDATE_FLAG_SCTP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) !tcf_csum_sctp(skb, iph->ihl * 4, ntohs(iph->tot_len)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (update_flags & TCA_CSUM_UPDATE_FLAG_IPV4HDR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (skb_try_make_writable(skb, sizeof(*iph) + ntkoff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) ip_send_check(ip_hdr(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) static int tcf_csum_ipv6_hopopts(struct ipv6_opt_hdr *ip6xh, unsigned int ixhl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) unsigned int *pl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int off, len, optlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) unsigned char *xh = (void *)ip6xh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) off = sizeof(*ip6xh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) len = ixhl - off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) while (len > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) switch (xh[off]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) case IPV6_TLV_PAD1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) optlen = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) case IPV6_TLV_JUMBO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) optlen = xh[off + 1] + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (optlen != 6 || len < 6 || (off & 3) != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) /* wrong jumbo option length/alignment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) *pl = ntohl(*(__be32 *)(xh + off + 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) optlen = xh[off + 1] + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (optlen > len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) /* ignore obscure options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) off += optlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) len -= optlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) static int tcf_csum_ipv6(struct sk_buff *skb, u32 update_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) struct ipv6hdr *ip6h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) struct ipv6_opt_hdr *ip6xh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) unsigned int hl, ixhl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) unsigned int pl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) int ntkoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) u8 nexthdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ntkoff = skb_network_offset(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) hl = sizeof(*ip6h);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (!pskb_may_pull(skb, hl + ntkoff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ip6h = ipv6_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) pl = ntohs(ip6h->payload_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) nexthdr = ip6h->nexthdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) switch (nexthdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) case NEXTHDR_FRAGMENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) goto ignore_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) case NEXTHDR_ROUTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) case NEXTHDR_HOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) case NEXTHDR_DEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) if (!pskb_may_pull(skb, hl + sizeof(*ip6xh) + ntkoff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) ip6xh = (void *)(skb_network_header(skb) + hl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) ixhl = ipv6_optlen(ip6xh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (!pskb_may_pull(skb, hl + ixhl + ntkoff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) ip6xh = (void *)(skb_network_header(skb) + hl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if ((nexthdr == NEXTHDR_HOP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) !(tcf_csum_ipv6_hopopts(ip6xh, ixhl, &pl)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) nexthdr = ip6xh->nexthdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) hl += ixhl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) case IPPROTO_ICMPV6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (update_flags & TCA_CSUM_UPDATE_FLAG_ICMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (!tcf_csum_ipv6_icmp(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) hl, pl + sizeof(*ip6h)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) case IPPROTO_TCP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (update_flags & TCA_CSUM_UPDATE_FLAG_TCP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (!tcf_csum_ipv6_tcp(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) hl, pl + sizeof(*ip6h)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) case IPPROTO_UDP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (update_flags & TCA_CSUM_UPDATE_FLAG_UDP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (!tcf_csum_ipv6_udp(skb, hl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) pl + sizeof(*ip6h), 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) case IPPROTO_UDPLITE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (update_flags & TCA_CSUM_UPDATE_FLAG_UDPLITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (!tcf_csum_ipv6_udp(skb, hl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) pl + sizeof(*ip6h), 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) case IPPROTO_SCTP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if ((update_flags & TCA_CSUM_UPDATE_FLAG_SCTP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) !tcf_csum_sctp(skb, hl, pl + sizeof(*ip6h)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) goto ignore_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) } while (pskb_may_pull(skb, hl + 1 + ntkoff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) ignore_skb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) static int tcf_csum_act(struct sk_buff *skb, const struct tc_action *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) struct tcf_result *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct tcf_csum *p = to_tcf_csum(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) bool orig_vlan_tag_present = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) unsigned int vlan_hdr_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct tcf_csum_params *params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) u32 update_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) __be16 protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) int action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) params = rcu_dereference_bh(p->params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) tcf_lastuse_update(&p->tcf_tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) tcf_action_update_bstats(&p->common, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) action = READ_ONCE(p->tcf_action);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (unlikely(action == TC_ACT_SHOT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) update_flags = params->update_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) protocol = skb_protocol(skb, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) switch (protocol) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) case cpu_to_be16(ETH_P_IP):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (!tcf_csum_ipv4(skb, update_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) case cpu_to_be16(ETH_P_IPV6):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (!tcf_csum_ipv6(skb, update_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) case cpu_to_be16(ETH_P_8021AD):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) case cpu_to_be16(ETH_P_8021Q):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (skb_vlan_tag_present(skb) && !orig_vlan_tag_present) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) protocol = skb->protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) orig_vlan_tag_present = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) struct vlan_hdr *vlan = (struct vlan_hdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) protocol = vlan->h_vlan_encapsulated_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) skb_pull(skb, VLAN_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) vlan_hdr_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) /* Restore the skb for the pulled VLAN tags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) while (vlan_hdr_count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) skb_push(skb, VLAN_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) tcf_action_inc_drop_qstats(&p->common);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) action = TC_ACT_SHOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) static int tcf_csum_dump(struct sk_buff *skb, struct tc_action *a, int bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) int ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) unsigned char *b = skb_tail_pointer(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) struct tcf_csum *p = to_tcf_csum(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) struct tcf_csum_params *params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) struct tc_csum opt = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) .index = p->tcf_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) .refcnt = refcount_read(&p->tcf_refcnt) - ref,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) .bindcnt = atomic_read(&p->tcf_bindcnt) - bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) struct tcf_t t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) spin_lock_bh(&p->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) params = rcu_dereference_protected(p->params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) lockdep_is_held(&p->tcf_lock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) opt.action = p->tcf_action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) opt.update_flags = params->update_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) if (nla_put(skb, TCA_CSUM_PARMS, sizeof(opt), &opt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) tcf_tm_dump(&t, &p->tcf_tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) if (nla_put_64bit(skb, TCA_CSUM_TM, sizeof(t), &t, TCA_CSUM_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) spin_unlock_bh(&p->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) spin_unlock_bh(&p->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) nlmsg_trim(skb, b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) static void tcf_csum_cleanup(struct tc_action *a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) struct tcf_csum *p = to_tcf_csum(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) struct tcf_csum_params *params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) params = rcu_dereference_protected(p->params, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) kfree_rcu(params, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) static int tcf_csum_walker(struct net *net, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct netlink_callback *cb, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) const struct tc_action_ops *ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) struct tc_action_net *tn = net_generic(net, csum_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return tcf_generic_walker(tn, skb, cb, type, ops, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) static int tcf_csum_search(struct net *net, struct tc_action **a, u32 index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) struct tc_action_net *tn = net_generic(net, csum_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) return tcf_idr_search(tn, a, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) static size_t tcf_csum_get_fill_size(const struct tc_action *act)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) return nla_total_size(sizeof(struct tc_csum));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) static struct tc_action_ops act_csum_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) .kind = "csum",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) .id = TCA_ID_CSUM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) .act = tcf_csum_act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) .dump = tcf_csum_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) .init = tcf_csum_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) .cleanup = tcf_csum_cleanup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) .walk = tcf_csum_walker,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) .lookup = tcf_csum_search,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) .get_fill_size = tcf_csum_get_fill_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) .size = sizeof(struct tcf_csum),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) static __net_init int csum_init_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) struct tc_action_net *tn = net_generic(net, csum_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) return tc_action_net_init(net, tn, &act_csum_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) static void __net_exit csum_exit_net(struct list_head *net_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) tc_action_net_exit(net_list, csum_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) static struct pernet_operations csum_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) .init = csum_init_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) .exit_batch = csum_exit_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) .id = &csum_net_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) .size = sizeof(struct tc_action_net),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) MODULE_DESCRIPTION("Checksum updating actions");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) static int __init csum_init_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) return tcf_register_action(&act_csum_ops, &csum_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) static void __exit csum_cleanup_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) tcf_unregister_action(&act_csum_ops, &csum_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) module_init(csum_init_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) module_exit(csum_cleanup_module);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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