Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 2 | /* |
| 3 | * net/sched/act_skbmod.c skb data modifier |
| 4 | * |
| 5 | * Copyright (c) 2016 Jamal Hadi Salim <jhs@mojatatu.com> |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
Peilin Ye | 727d6a8 | 2021-07-19 16:41:24 -0700 | [diff] [blame] | 9 | #include <linux/if_arp.h> |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 10 | #include <linux/init.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/skbuff.h> |
| 13 | #include <linux/rtnetlink.h> |
Peilin Ye | 56af5e7 | 2021-07-27 18:33:15 -0700 | [diff] [blame] | 14 | #include <net/inet_ecn.h> |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 15 | #include <net/netlink.h> |
| 16 | #include <net/pkt_sched.h> |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 17 | #include <net/pkt_cls.h> |
Pedro Tammela | 871cf38 | 2022-12-06 10:55:12 -0300 | [diff] [blame] | 18 | #include <net/tc_wrapper.h> |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 19 | |
| 20 | #include <linux/tc_act/tc_skbmod.h> |
| 21 | #include <net/tc_act/tc_skbmod.h> |
| 22 | |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 23 | static struct tc_action_ops act_skbmod_ops; |
| 24 | |
Pedro Tammela | 871cf38 | 2022-12-06 10:55:12 -0300 | [diff] [blame] | 25 | TC_INDIRECT_SCOPE int tcf_skbmod_act(struct sk_buff *skb, |
| 26 | const struct tc_action *a, |
| 27 | struct tcf_result *res) |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 28 | { |
| 29 | struct tcf_skbmod *d = to_skbmod(a); |
Peilin Ye | 56af5e7 | 2021-07-27 18:33:15 -0700 | [diff] [blame] | 30 | int action, max_edit_len, err; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 31 | struct tcf_skbmod_params *p; |
| 32 | u64 flags; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 33 | |
| 34 | tcf_lastuse_update(&d->tcf_tm); |
Ahmed S. Darwish | 50dc9a8 | 2021-10-16 10:49:09 +0200 | [diff] [blame] | 35 | bstats_update(this_cpu_ptr(d->common.cpu_bstats), skb); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 36 | |
Peilin Ye | 727d6a8 | 2021-07-19 16:41:24 -0700 | [diff] [blame] | 37 | action = READ_ONCE(d->tcf_action); |
| 38 | if (unlikely(action == TC_ACT_SHOT)) |
| 39 | goto drop; |
| 40 | |
Peilin Ye | 56af5e7 | 2021-07-27 18:33:15 -0700 | [diff] [blame] | 41 | max_edit_len = skb_mac_header_len(skb); |
| 42 | p = rcu_dereference_bh(d->skbmod_p); |
| 43 | flags = p->flags; |
Peilin Ye | 727d6a8 | 2021-07-19 16:41:24 -0700 | [diff] [blame] | 44 | |
Peilin Ye | 56af5e7 | 2021-07-27 18:33:15 -0700 | [diff] [blame] | 45 | /* tcf_skbmod_init() guarantees "flags" to be one of the following: |
| 46 | * 1. a combination of SKBMOD_F_{DMAC,SMAC,ETYPE} |
| 47 | * 2. SKBMOD_F_SWAPMAC |
| 48 | * 3. SKBMOD_F_ECN |
| 49 | * SKBMOD_F_ECN only works with IP packets; all other flags only work with Ethernet |
| 50 | * packets. |
| 51 | */ |
| 52 | if (flags == SKBMOD_F_ECN) { |
| 53 | switch (skb_protocol(skb, true)) { |
| 54 | case cpu_to_be16(ETH_P_IP): |
| 55 | case cpu_to_be16(ETH_P_IPV6): |
| 56 | max_edit_len += skb_network_header_len(skb); |
| 57 | break; |
| 58 | default: |
| 59 | goto out; |
| 60 | } |
| 61 | } else if (!skb->dev || skb->dev->type != ARPHRD_ETHER) { |
| 62 | goto out; |
| 63 | } |
| 64 | |
| 65 | err = skb_ensure_writable(skb, max_edit_len); |
Paolo Abeni | 7fd4b28 | 2018-07-30 14:30:43 +0200 | [diff] [blame] | 66 | if (unlikely(err)) /* best policy is to drop on the floor */ |
| 67 | goto drop; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 68 | |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 69 | if (flags & SKBMOD_F_DMAC) |
| 70 | ether_addr_copy(eth_hdr(skb)->h_dest, p->eth_dst); |
| 71 | if (flags & SKBMOD_F_SMAC) |
| 72 | ether_addr_copy(eth_hdr(skb)->h_source, p->eth_src); |
| 73 | if (flags & SKBMOD_F_ETYPE) |
| 74 | eth_hdr(skb)->h_proto = p->eth_type; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 75 | |
| 76 | if (flags & SKBMOD_F_SWAPMAC) { |
| 77 | u16 tmpaddr[ETH_ALEN / 2]; /* ether_addr_copy() requirement */ |
| 78 | /*XXX: I am sure we can come up with more efficient swapping*/ |
| 79 | ether_addr_copy((u8 *)tmpaddr, eth_hdr(skb)->h_dest); |
| 80 | ether_addr_copy(eth_hdr(skb)->h_dest, eth_hdr(skb)->h_source); |
| 81 | ether_addr_copy(eth_hdr(skb)->h_source, (u8 *)tmpaddr); |
| 82 | } |
| 83 | |
Peilin Ye | 56af5e7 | 2021-07-27 18:33:15 -0700 | [diff] [blame] | 84 | if (flags & SKBMOD_F_ECN) |
| 85 | INET_ECN_set_ce(skb); |
| 86 | |
| 87 | out: |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 88 | return action; |
Paolo Abeni | 7fd4b28 | 2018-07-30 14:30:43 +0200 | [diff] [blame] | 89 | |
| 90 | drop: |
| 91 | qstats_overlimit_inc(this_cpu_ptr(d->common.cpu_qstats)); |
| 92 | return TC_ACT_SHOT; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static const struct nla_policy skbmod_policy[TCA_SKBMOD_MAX + 1] = { |
| 96 | [TCA_SKBMOD_PARMS] = { .len = sizeof(struct tc_skbmod) }, |
| 97 | [TCA_SKBMOD_DMAC] = { .len = ETH_ALEN }, |
| 98 | [TCA_SKBMOD_SMAC] = { .len = ETH_ALEN }, |
| 99 | [TCA_SKBMOD_ETYPE] = { .type = NLA_U16 }, |
| 100 | }; |
| 101 | |
| 102 | static int tcf_skbmod_init(struct net *net, struct nlattr *nla, |
| 103 | struct nlattr *est, struct tc_action **a, |
Vlad Buslov | abbb0d3 | 2019-10-30 16:09:05 +0200 | [diff] [blame] | 104 | struct tcf_proto *tp, u32 flags, |
Vlad Buslov | 789871b | 2018-07-05 17:24:25 +0300 | [diff] [blame] | 105 | struct netlink_ext_ack *extack) |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 106 | { |
Zhengchao Shao | acd0a7a | 2022-09-08 12:14:33 +0800 | [diff] [blame] | 107 | struct tc_action_net *tn = net_generic(net, act_skbmod_ops.net_id); |
Cong Wang | 695176b | 2021-07-29 16:12:14 -0700 | [diff] [blame] | 108 | bool ovr = flags & TCA_ACT_FLAGS_REPLACE; |
| 109 | bool bind = flags & TCA_ACT_FLAGS_BIND; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 110 | struct nlattr *tb[TCA_SKBMOD_MAX + 1]; |
| 111 | struct tcf_skbmod_params *p, *p_old; |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 112 | struct tcf_chain *goto_ch = NULL; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 113 | struct tc_skbmod *parm; |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 114 | u32 lflags = 0, index; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 115 | struct tcf_skbmod *d; |
| 116 | bool exists = false; |
| 117 | u8 *daddr = NULL; |
| 118 | u8 *saddr = NULL; |
| 119 | u16 eth_type = 0; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 120 | int ret = 0, err; |
| 121 | |
| 122 | if (!nla) |
| 123 | return -EINVAL; |
| 124 | |
Johannes Berg | 8cb0817 | 2019-04-26 14:07:28 +0200 | [diff] [blame] | 125 | err = nla_parse_nested_deprecated(tb, TCA_SKBMOD_MAX, nla, |
| 126 | skbmod_policy, NULL); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 127 | if (err < 0) |
| 128 | return err; |
| 129 | |
| 130 | if (!tb[TCA_SKBMOD_PARMS]) |
| 131 | return -EINVAL; |
| 132 | |
| 133 | if (tb[TCA_SKBMOD_DMAC]) { |
| 134 | daddr = nla_data(tb[TCA_SKBMOD_DMAC]); |
| 135 | lflags |= SKBMOD_F_DMAC; |
| 136 | } |
| 137 | |
| 138 | if (tb[TCA_SKBMOD_SMAC]) { |
| 139 | saddr = nla_data(tb[TCA_SKBMOD_SMAC]); |
| 140 | lflags |= SKBMOD_F_SMAC; |
| 141 | } |
| 142 | |
| 143 | if (tb[TCA_SKBMOD_ETYPE]) { |
| 144 | eth_type = nla_get_u16(tb[TCA_SKBMOD_ETYPE]); |
| 145 | lflags |= SKBMOD_F_ETYPE; |
| 146 | } |
| 147 | |
| 148 | parm = nla_data(tb[TCA_SKBMOD_PARMS]); |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 149 | index = parm->index; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 150 | if (parm->flags & SKBMOD_F_SWAPMAC) |
| 151 | lflags = SKBMOD_F_SWAPMAC; |
Peilin Ye | 56af5e7 | 2021-07-27 18:33:15 -0700 | [diff] [blame] | 152 | if (parm->flags & SKBMOD_F_ECN) |
| 153 | lflags = SKBMOD_F_ECN; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 154 | |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 155 | err = tcf_idr_check_alloc(tn, &index, a, bind); |
Vlad Buslov | 0190c1d | 2018-07-05 17:24:32 +0300 | [diff] [blame] | 156 | if (err < 0) |
| 157 | return err; |
| 158 | exists = err; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 159 | if (exists && bind) |
| 160 | return 0; |
| 161 | |
Roman Mashak | a52956d | 2018-05-11 14:35:33 -0400 | [diff] [blame] | 162 | if (!lflags) { |
| 163 | if (exists) |
| 164 | tcf_idr_release(*a, bind); |
Vlad Buslov | 0190c1d | 2018-07-05 17:24:32 +0300 | [diff] [blame] | 165 | else |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 166 | tcf_idr_cleanup(tn, index); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 167 | return -EINVAL; |
Roman Mashak | a52956d | 2018-05-11 14:35:33 -0400 | [diff] [blame] | 168 | } |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 169 | |
| 170 | if (!exists) { |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 171 | ret = tcf_idr_create(tn, index, est, a, |
Baowen Zheng | 40bd094 | 2021-12-17 19:16:17 +0100 | [diff] [blame] | 172 | &act_skbmod_ops, bind, true, flags); |
Vlad Buslov | 0190c1d | 2018-07-05 17:24:32 +0300 | [diff] [blame] | 173 | if (ret) { |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 174 | tcf_idr_cleanup(tn, index); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 175 | return ret; |
Vlad Buslov | 0190c1d | 2018-07-05 17:24:32 +0300 | [diff] [blame] | 176 | } |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 177 | |
| 178 | ret = ACT_P_CREATED; |
Vlad Buslov | 4e8ddd7 | 2018-07-05 17:24:30 +0300 | [diff] [blame] | 179 | } else if (!ovr) { |
Chris Mi | 65a206c | 2017-08-30 02:31:59 -0400 | [diff] [blame] | 180 | tcf_idr_release(*a, bind); |
Vlad Buslov | 4e8ddd7 | 2018-07-05 17:24:30 +0300 | [diff] [blame] | 181 | return -EEXIST; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 182 | } |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 183 | err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); |
| 184 | if (err < 0) |
| 185 | goto release_idr; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 186 | |
| 187 | d = to_skbmod(*a); |
| 188 | |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 189 | p = kzalloc(sizeof(struct tcf_skbmod_params), GFP_KERNEL); |
| 190 | if (unlikely(!p)) { |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 191 | err = -ENOMEM; |
| 192 | goto put_chain; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | p->flags = lflags; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 196 | |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 197 | if (ovr) |
| 198 | spin_lock_bh(&d->tcf_lock); |
Vlad Buslov | c881455 | 2018-08-10 20:51:49 +0300 | [diff] [blame] | 199 | /* Protected by tcf_lock if overwriting existing action. */ |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 200 | goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); |
Vlad Buslov | c881455 | 2018-08-10 20:51:49 +0300 | [diff] [blame] | 201 | p_old = rcu_dereference_protected(d->skbmod_p, 1); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 202 | |
| 203 | if (lflags & SKBMOD_F_DMAC) |
| 204 | ether_addr_copy(p->eth_dst, daddr); |
| 205 | if (lflags & SKBMOD_F_SMAC) |
| 206 | ether_addr_copy(p->eth_src, saddr); |
| 207 | if (lflags & SKBMOD_F_ETYPE) |
| 208 | p->eth_type = htons(eth_type); |
| 209 | |
| 210 | rcu_assign_pointer(d->skbmod_p, p); |
| 211 | if (ovr) |
| 212 | spin_unlock_bh(&d->tcf_lock); |
| 213 | |
| 214 | if (p_old) |
| 215 | kfree_rcu(p_old, rcu); |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 216 | if (goto_ch) |
| 217 | tcf_chain_put_by_act(goto_ch); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 218 | |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 219 | return ret; |
Davide Caratti | 7c3d825 | 2019-03-20 15:00:12 +0100 | [diff] [blame] | 220 | put_chain: |
| 221 | if (goto_ch) |
| 222 | tcf_chain_put_by_act(goto_ch); |
| 223 | release_idr: |
| 224 | tcf_idr_release(*a, bind); |
| 225 | return err; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 226 | } |
| 227 | |
Cong Wang | 9a63b25 | 2017-12-05 12:53:07 -0800 | [diff] [blame] | 228 | static void tcf_skbmod_cleanup(struct tc_action *a) |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 229 | { |
| 230 | struct tcf_skbmod *d = to_skbmod(a); |
| 231 | struct tcf_skbmod_params *p; |
| 232 | |
| 233 | p = rcu_dereference_protected(d->skbmod_p, 1); |
Davide Caratti | 2d43361 | 2018-03-16 00:00:57 +0100 | [diff] [blame] | 234 | if (p) |
| 235 | kfree_rcu(p, rcu); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | static int tcf_skbmod_dump(struct sk_buff *skb, struct tc_action *a, |
| 239 | int bind, int ref) |
| 240 | { |
| 241 | struct tcf_skbmod *d = to_skbmod(a); |
| 242 | unsigned char *b = skb_tail_pointer(skb); |
Vlad Buslov | c881455 | 2018-08-10 20:51:49 +0300 | [diff] [blame] | 243 | struct tcf_skbmod_params *p; |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 244 | struct tc_skbmod opt = { |
| 245 | .index = d->tcf_index, |
Vlad Buslov | 036bb44 | 2018-07-05 17:24:24 +0300 | [diff] [blame] | 246 | .refcnt = refcount_read(&d->tcf_refcnt) - ref, |
| 247 | .bindcnt = atomic_read(&d->tcf_bindcnt) - bind, |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 248 | }; |
| 249 | struct tcf_t t; |
| 250 | |
Vlad Buslov | c881455 | 2018-08-10 20:51:49 +0300 | [diff] [blame] | 251 | spin_lock_bh(&d->tcf_lock); |
| 252 | opt.action = d->tcf_action; |
| 253 | p = rcu_dereference_protected(d->skbmod_p, |
| 254 | lockdep_is_held(&d->tcf_lock)); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 255 | opt.flags = p->flags; |
| 256 | if (nla_put(skb, TCA_SKBMOD_PARMS, sizeof(opt), &opt)) |
| 257 | goto nla_put_failure; |
| 258 | if ((p->flags & SKBMOD_F_DMAC) && |
| 259 | nla_put(skb, TCA_SKBMOD_DMAC, ETH_ALEN, p->eth_dst)) |
| 260 | goto nla_put_failure; |
| 261 | if ((p->flags & SKBMOD_F_SMAC) && |
| 262 | nla_put(skb, TCA_SKBMOD_SMAC, ETH_ALEN, p->eth_src)) |
| 263 | goto nla_put_failure; |
| 264 | if ((p->flags & SKBMOD_F_ETYPE) && |
| 265 | nla_put_u16(skb, TCA_SKBMOD_ETYPE, ntohs(p->eth_type))) |
| 266 | goto nla_put_failure; |
| 267 | |
| 268 | tcf_tm_dump(&t, &d->tcf_tm); |
| 269 | if (nla_put_64bit(skb, TCA_SKBMOD_TM, sizeof(t), &t, TCA_SKBMOD_PAD)) |
| 270 | goto nla_put_failure; |
| 271 | |
Vlad Buslov | c881455 | 2018-08-10 20:51:49 +0300 | [diff] [blame] | 272 | spin_unlock_bh(&d->tcf_lock); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 273 | return skb->len; |
| 274 | nla_put_failure: |
Vlad Buslov | c881455 | 2018-08-10 20:51:49 +0300 | [diff] [blame] | 275 | spin_unlock_bh(&d->tcf_lock); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 276 | nlmsg_trim(skb, b); |
| 277 | return -1; |
| 278 | } |
| 279 | |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 280 | static struct tc_action_ops act_skbmod_ops = { |
| 281 | .kind = "skbmod", |
Eli Cohen | eddd2cf | 2019-02-10 14:25:00 +0200 | [diff] [blame] | 282 | .id = TCA_ACT_SKBMOD, |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 283 | .owner = THIS_MODULE, |
Jamal Hadi Salim | 353d2c2 | 2018-08-12 09:34:59 -0400 | [diff] [blame] | 284 | .act = tcf_skbmod_act, |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 285 | .dump = tcf_skbmod_dump, |
| 286 | .init = tcf_skbmod_init, |
| 287 | .cleanup = tcf_skbmod_cleanup, |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 288 | .size = sizeof(struct tcf_skbmod), |
| 289 | }; |
| 290 | |
| 291 | static __net_init int skbmod_init_net(struct net *net) |
| 292 | { |
Zhengchao Shao | acd0a7a | 2022-09-08 12:14:33 +0800 | [diff] [blame] | 293 | struct tc_action_net *tn = net_generic(net, act_skbmod_ops.net_id); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 294 | |
Cong Wang | 981471bd | 2019-08-25 10:01:32 -0700 | [diff] [blame] | 295 | return tc_action_net_init(net, tn, &act_skbmod_ops); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 296 | } |
| 297 | |
Cong Wang | 039af9c | 2017-12-11 15:35:03 -0800 | [diff] [blame] | 298 | static void __net_exit skbmod_exit_net(struct list_head *net_list) |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 299 | { |
Zhengchao Shao | acd0a7a | 2022-09-08 12:14:33 +0800 | [diff] [blame] | 300 | tc_action_net_exit(net_list, act_skbmod_ops.net_id); |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | static struct pernet_operations skbmod_net_ops = { |
| 304 | .init = skbmod_init_net, |
Cong Wang | 039af9c | 2017-12-11 15:35:03 -0800 | [diff] [blame] | 305 | .exit_batch = skbmod_exit_net, |
Zhengchao Shao | acd0a7a | 2022-09-08 12:14:33 +0800 | [diff] [blame] | 306 | .id = &act_skbmod_ops.net_id, |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 307 | .size = sizeof(struct tc_action_net), |
Jamal Hadi Salim | 86da71b | 2016-09-12 20:13:09 -0400 | [diff] [blame] | 308 | }; |
| 309 | |
| 310 | MODULE_AUTHOR("Jamal Hadi Salim, <jhs@mojatatu.com>"); |
| 311 | MODULE_DESCRIPTION("SKB data mod-ing"); |
| 312 | MODULE_LICENSE("GPL"); |
| 313 | |
| 314 | static int __init skbmod_init_module(void) |
| 315 | { |
| 316 | return tcf_register_action(&act_skbmod_ops, &skbmod_net_ops); |
| 317 | } |
| 318 | |
| 319 | static void __exit skbmod_cleanup_module(void) |
| 320 | { |
| 321 | tcf_unregister_action(&act_skbmod_ops, &skbmod_net_ops); |
| 322 | } |
| 323 | |
| 324 | module_init(skbmod_init_module); |
| 325 | module_exit(skbmod_cleanup_module); |