Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* net/sched/act_ctinfo.c netfilter ctinfo connmark actions |
| 3 | * |
| 4 | * Copyright (c) 2019 Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk> |
| 5 | */ |
| 6 | |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/init.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/skbuff.h> |
| 11 | #include <linux/rtnetlink.h> |
| 12 | #include <linux/pkt_cls.h> |
| 13 | #include <linux/ip.h> |
| 14 | #include <linux/ipv6.h> |
| 15 | #include <net/netlink.h> |
| 16 | #include <net/pkt_sched.h> |
| 17 | #include <net/act_api.h> |
| 18 | #include <net/pkt_cls.h> |
| 19 | #include <uapi/linux/tc_act/tc_ctinfo.h> |
| 20 | #include <net/tc_act/tc_ctinfo.h> |
| 21 | |
| 22 | #include <net/netfilter/nf_conntrack.h> |
| 23 | #include <net/netfilter/nf_conntrack_core.h> |
| 24 | #include <net/netfilter/nf_conntrack_ecache.h> |
| 25 | #include <net/netfilter/nf_conntrack_zones.h> |
| 26 | |
| 27 | static struct tc_action_ops act_ctinfo_ops; |
| 28 | static unsigned int ctinfo_net_id; |
| 29 | |
| 30 | static void tcf_ctinfo_dscp_set(struct nf_conn *ct, struct tcf_ctinfo *ca, |
| 31 | struct tcf_ctinfo_params *cp, |
| 32 | struct sk_buff *skb, int wlen, int proto) |
| 33 | { |
| 34 | u8 dscp, newdscp; |
| 35 | |
| 36 | newdscp = (((ct->mark & cp->dscpmask) >> cp->dscpmaskshift) << 2) & |
| 37 | ~INET_ECN_MASK; |
| 38 | |
| 39 | switch (proto) { |
| 40 | case NFPROTO_IPV4: |
| 41 | dscp = ipv4_get_dsfield(ip_hdr(skb)) & ~INET_ECN_MASK; |
| 42 | if (dscp != newdscp) { |
| 43 | if (likely(!skb_try_make_writable(skb, wlen))) { |
| 44 | ipv4_change_dsfield(ip_hdr(skb), |
| 45 | INET_ECN_MASK, |
| 46 | newdscp); |
| 47 | ca->stats_dscp_set++; |
| 48 | } else { |
| 49 | ca->stats_dscp_error++; |
| 50 | } |
| 51 | } |
| 52 | break; |
| 53 | case NFPROTO_IPV6: |
| 54 | dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & ~INET_ECN_MASK; |
| 55 | if (dscp != newdscp) { |
| 56 | if (likely(!skb_try_make_writable(skb, wlen))) { |
| 57 | ipv6_change_dsfield(ipv6_hdr(skb), |
| 58 | INET_ECN_MASK, |
| 59 | newdscp); |
| 60 | ca->stats_dscp_set++; |
| 61 | } else { |
| 62 | ca->stats_dscp_error++; |
| 63 | } |
| 64 | } |
| 65 | break; |
| 66 | default: |
| 67 | break; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | static void tcf_ctinfo_cpmark_set(struct nf_conn *ct, struct tcf_ctinfo *ca, |
| 72 | struct tcf_ctinfo_params *cp, |
| 73 | struct sk_buff *skb) |
| 74 | { |
| 75 | ca->stats_cpmark_set++; |
| 76 | skb->mark = ct->mark & cp->cpmarkmask; |
| 77 | } |
| 78 | |
| 79 | static int tcf_ctinfo_act(struct sk_buff *skb, const struct tc_action *a, |
| 80 | struct tcf_result *res) |
| 81 | { |
| 82 | const struct nf_conntrack_tuple_hash *thash = NULL; |
| 83 | struct tcf_ctinfo *ca = to_ctinfo(a); |
| 84 | struct nf_conntrack_tuple tuple; |
| 85 | struct nf_conntrack_zone zone; |
| 86 | enum ip_conntrack_info ctinfo; |
| 87 | struct tcf_ctinfo_params *cp; |
| 88 | struct nf_conn *ct; |
| 89 | int proto, wlen; |
| 90 | int action; |
| 91 | |
| 92 | cp = rcu_dereference_bh(ca->params); |
| 93 | |
| 94 | tcf_lastuse_update(&ca->tcf_tm); |
| 95 | bstats_update(&ca->tcf_bstats, skb); |
| 96 | action = READ_ONCE(ca->tcf_action); |
| 97 | |
| 98 | wlen = skb_network_offset(skb); |
Toke Høiland-Jørgensen | d7bf2eb | 2020-07-03 22:26:43 +0200 | [diff] [blame] | 99 | switch (skb_protocol(skb, true)) { |
| 100 | case htons(ETH_P_IP): |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 101 | wlen += sizeof(struct iphdr); |
| 102 | if (!pskb_may_pull(skb, wlen)) |
| 103 | goto out; |
| 104 | |
| 105 | proto = NFPROTO_IPV4; |
Toke Høiland-Jørgensen | d7bf2eb | 2020-07-03 22:26:43 +0200 | [diff] [blame] | 106 | break; |
| 107 | case htons(ETH_P_IPV6): |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 108 | wlen += sizeof(struct ipv6hdr); |
| 109 | if (!pskb_may_pull(skb, wlen)) |
| 110 | goto out; |
| 111 | |
| 112 | proto = NFPROTO_IPV6; |
Toke Høiland-Jørgensen | d7bf2eb | 2020-07-03 22:26:43 +0200 | [diff] [blame] | 113 | break; |
| 114 | default: |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 115 | goto out; |
| 116 | } |
| 117 | |
| 118 | ct = nf_ct_get(skb, &ctinfo); |
| 119 | if (!ct) { /* look harder, usually ingress */ |
| 120 | if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), |
| 121 | proto, cp->net, &tuple)) |
| 122 | goto out; |
| 123 | zone.id = cp->zone; |
| 124 | zone.dir = NF_CT_DEFAULT_ZONE_DIR; |
| 125 | |
| 126 | thash = nf_conntrack_find_get(cp->net, &zone, &tuple); |
| 127 | if (!thash) |
| 128 | goto out; |
| 129 | |
| 130 | ct = nf_ct_tuplehash_to_ctrack(thash); |
| 131 | } |
| 132 | |
| 133 | if (cp->mode & CTINFO_MODE_DSCP) |
| 134 | if (!cp->dscpstatemask || (ct->mark & cp->dscpstatemask)) |
| 135 | tcf_ctinfo_dscp_set(ct, ca, cp, skb, wlen, proto); |
| 136 | |
| 137 | if (cp->mode & CTINFO_MODE_CPMARK) |
| 138 | tcf_ctinfo_cpmark_set(ct, ca, cp, skb); |
| 139 | |
| 140 | if (thash) |
| 141 | nf_ct_put(ct); |
| 142 | out: |
| 143 | return action; |
| 144 | } |
| 145 | |
| 146 | static const struct nla_policy ctinfo_policy[TCA_CTINFO_MAX + 1] = { |
Johannes Berg | 8140860 | 2020-08-18 10:17:31 +0200 | [diff] [blame] | 147 | [TCA_CTINFO_ACT] = |
| 148 | NLA_POLICY_EXACT_LEN(sizeof(struct tc_ctinfo)), |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 149 | [TCA_CTINFO_ZONE] = { .type = NLA_U16 }, |
| 150 | [TCA_CTINFO_PARMS_DSCP_MASK] = { .type = NLA_U32 }, |
| 151 | [TCA_CTINFO_PARMS_DSCP_STATEMASK] = { .type = NLA_U32 }, |
| 152 | [TCA_CTINFO_PARMS_CPMARK_MASK] = { .type = NLA_U32 }, |
| 153 | }; |
| 154 | |
| 155 | static int tcf_ctinfo_init(struct net *net, struct nlattr *nla, |
| 156 | struct nlattr *est, struct tc_action **a, |
Vlad Buslov | abbb0d3 | 2019-10-30 16:09:05 +0200 | [diff] [blame] | 157 | struct tcf_proto *tp, u32 flags, |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 158 | struct netlink_ext_ack *extack) |
| 159 | { |
| 160 | struct tc_action_net *tn = net_generic(net, ctinfo_net_id); |
Cong Wang | 695176b | 2021-07-29 16:12:14 -0700 | [diff] [blame] | 161 | bool bind = flags & TCA_ACT_FLAGS_BIND; |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 162 | u32 dscpmask = 0, dscpstatemask, index; |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 163 | struct nlattr *tb[TCA_CTINFO_MAX + 1]; |
| 164 | struct tcf_ctinfo_params *cp_new; |
| 165 | struct tcf_chain *goto_ch = NULL; |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 166 | struct tc_ctinfo *actparm; |
| 167 | struct tcf_ctinfo *ci; |
| 168 | u8 dscpmaskshift; |
| 169 | int ret = 0, err; |
| 170 | |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 171 | if (!nla) { |
| 172 | NL_SET_ERR_MSG_MOD(extack, "ctinfo requires attributes to be passed"); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 173 | return -EINVAL; |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 174 | } |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 175 | |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 176 | err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, extack); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 177 | if (err < 0) |
| 178 | return err; |
| 179 | |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 180 | if (!tb[TCA_CTINFO_ACT]) { |
| 181 | NL_SET_ERR_MSG_MOD(extack, |
| 182 | "Missing required TCA_CTINFO_ACT attribute"); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 183 | return -EINVAL; |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 184 | } |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 185 | actparm = nla_data(tb[TCA_CTINFO_ACT]); |
| 186 | |
| 187 | /* do some basic validation here before dynamically allocating things */ |
| 188 | /* that we would otherwise have to clean up. */ |
| 189 | if (tb[TCA_CTINFO_PARMS_DSCP_MASK]) { |
| 190 | dscpmask = nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_MASK]); |
| 191 | /* need contiguous 6 bit mask */ |
| 192 | dscpmaskshift = dscpmask ? __ffs(dscpmask) : 0; |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 193 | if ((~0 & (dscpmask >> dscpmaskshift)) != 0x3f) { |
| 194 | NL_SET_ERR_MSG_ATTR(extack, |
| 195 | tb[TCA_CTINFO_PARMS_DSCP_MASK], |
| 196 | "dscp mask must be 6 contiguous bits"); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 197 | return -EINVAL; |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 198 | } |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 199 | dscpstatemask = tb[TCA_CTINFO_PARMS_DSCP_STATEMASK] ? |
| 200 | nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) : 0; |
| 201 | /* mask & statemask must not overlap */ |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 202 | if (dscpmask & dscpstatemask) { |
| 203 | NL_SET_ERR_MSG_ATTR(extack, |
| 204 | tb[TCA_CTINFO_PARMS_DSCP_STATEMASK], |
| 205 | "dscp statemask must not overlap dscp mask"); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 206 | return -EINVAL; |
Kevin Darbyshire-Bryant | 733f076 | 2019-06-14 10:09:44 +0100 | [diff] [blame] | 207 | } |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /* done the validation:now to the actual action allocation */ |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 211 | index = actparm->index; |
| 212 | err = tcf_idr_check_alloc(tn, &index, a, bind); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 213 | if (!err) { |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 214 | ret = tcf_idr_create(tn, index, est, a, |
Baowen Zheng | 40bd094 | 2021-12-17 19:16:17 +0100 | [diff] [blame] | 215 | &act_ctinfo_ops, bind, false, flags); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 216 | if (ret) { |
Dmytro Linkin | 7be8ef2 | 2019-08-01 13:02:51 +0000 | [diff] [blame] | 217 | tcf_idr_cleanup(tn, index); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 218 | return ret; |
| 219 | } |
Kevin Darbyshire-Bryant | a658c2e | 2019-06-17 11:03:26 +0100 | [diff] [blame] | 220 | ret = ACT_P_CREATED; |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 221 | } else if (err > 0) { |
| 222 | if (bind) /* don't override defaults */ |
| 223 | return 0; |
Cong Wang | 695176b | 2021-07-29 16:12:14 -0700 | [diff] [blame] | 224 | if (!(flags & TCA_ACT_FLAGS_REPLACE)) { |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 225 | tcf_idr_release(*a, bind); |
| 226 | return -EEXIST; |
| 227 | } |
| 228 | } else { |
| 229 | return err; |
| 230 | } |
| 231 | |
| 232 | err = tcf_action_check_ctrlact(actparm->action, tp, &goto_ch, extack); |
| 233 | if (err < 0) |
| 234 | goto release_idr; |
| 235 | |
| 236 | ci = to_ctinfo(*a); |
| 237 | |
| 238 | cp_new = kzalloc(sizeof(*cp_new), GFP_KERNEL); |
| 239 | if (unlikely(!cp_new)) { |
| 240 | err = -ENOMEM; |
| 241 | goto put_chain; |
| 242 | } |
| 243 | |
| 244 | cp_new->net = net; |
| 245 | cp_new->zone = tb[TCA_CTINFO_ZONE] ? |
| 246 | nla_get_u16(tb[TCA_CTINFO_ZONE]) : 0; |
| 247 | if (dscpmask) { |
| 248 | cp_new->dscpmask = dscpmask; |
| 249 | cp_new->dscpmaskshift = dscpmaskshift; |
| 250 | cp_new->dscpstatemask = dscpstatemask; |
| 251 | cp_new->mode |= CTINFO_MODE_DSCP; |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | if (tb[TCA_CTINFO_PARMS_CPMARK_MASK]) { |
| 255 | cp_new->cpmarkmask = |
| 256 | nla_get_u32(tb[TCA_CTINFO_PARMS_CPMARK_MASK]); |
| 257 | cp_new->mode |= CTINFO_MODE_CPMARK; |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | spin_lock_bh(&ci->tcf_lock); |
| 261 | goto_ch = tcf_action_set_ctrlact(*a, actparm->action, goto_ch); |
Paul E. McKenney | 445d374 | 2019-09-23 16:09:18 -0700 | [diff] [blame] | 262 | cp_new = rcu_replace_pointer(ci->params, cp_new, |
| 263 | lockdep_is_held(&ci->tcf_lock)); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 264 | spin_unlock_bh(&ci->tcf_lock); |
| 265 | |
| 266 | if (goto_ch) |
| 267 | tcf_chain_put_by_act(goto_ch); |
| 268 | if (cp_new) |
| 269 | kfree_rcu(cp_new, rcu); |
| 270 | |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 271 | return ret; |
| 272 | |
| 273 | put_chain: |
| 274 | if (goto_ch) |
| 275 | tcf_chain_put_by_act(goto_ch); |
| 276 | release_idr: |
| 277 | tcf_idr_release(*a, bind); |
| 278 | return err; |
| 279 | } |
| 280 | |
| 281 | static int tcf_ctinfo_dump(struct sk_buff *skb, struct tc_action *a, |
| 282 | int bind, int ref) |
| 283 | { |
| 284 | struct tcf_ctinfo *ci = to_ctinfo(a); |
| 285 | struct tc_ctinfo opt = { |
| 286 | .index = ci->tcf_index, |
| 287 | .refcnt = refcount_read(&ci->tcf_refcnt) - ref, |
| 288 | .bindcnt = atomic_read(&ci->tcf_bindcnt) - bind, |
| 289 | }; |
| 290 | unsigned char *b = skb_tail_pointer(skb); |
| 291 | struct tcf_ctinfo_params *cp; |
| 292 | struct tcf_t t; |
| 293 | |
| 294 | spin_lock_bh(&ci->tcf_lock); |
| 295 | cp = rcu_dereference_protected(ci->params, |
| 296 | lockdep_is_held(&ci->tcf_lock)); |
| 297 | |
| 298 | tcf_tm_dump(&t, &ci->tcf_tm); |
| 299 | if (nla_put_64bit(skb, TCA_CTINFO_TM, sizeof(t), &t, TCA_CTINFO_PAD)) |
| 300 | goto nla_put_failure; |
| 301 | |
| 302 | opt.action = ci->tcf_action; |
| 303 | if (nla_put(skb, TCA_CTINFO_ACT, sizeof(opt), &opt)) |
| 304 | goto nla_put_failure; |
| 305 | |
| 306 | if (nla_put_u16(skb, TCA_CTINFO_ZONE, cp->zone)) |
| 307 | goto nla_put_failure; |
| 308 | |
| 309 | if (cp->mode & CTINFO_MODE_DSCP) { |
| 310 | if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_MASK, |
| 311 | cp->dscpmask)) |
| 312 | goto nla_put_failure; |
| 313 | if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_STATEMASK, |
| 314 | cp->dscpstatemask)) |
| 315 | goto nla_put_failure; |
| 316 | } |
| 317 | |
| 318 | if (cp->mode & CTINFO_MODE_CPMARK) { |
| 319 | if (nla_put_u32(skb, TCA_CTINFO_PARMS_CPMARK_MASK, |
| 320 | cp->cpmarkmask)) |
| 321 | goto nla_put_failure; |
| 322 | } |
| 323 | |
| 324 | if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_SET, |
| 325 | ci->stats_dscp_set, TCA_CTINFO_PAD)) |
| 326 | goto nla_put_failure; |
| 327 | |
| 328 | if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_ERROR, |
| 329 | ci->stats_dscp_error, TCA_CTINFO_PAD)) |
| 330 | goto nla_put_failure; |
| 331 | |
| 332 | if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_CPMARK_SET, |
| 333 | ci->stats_cpmark_set, TCA_CTINFO_PAD)) |
| 334 | goto nla_put_failure; |
| 335 | |
| 336 | spin_unlock_bh(&ci->tcf_lock); |
| 337 | return skb->len; |
| 338 | |
| 339 | nla_put_failure: |
| 340 | spin_unlock_bh(&ci->tcf_lock); |
| 341 | nlmsg_trim(skb, b); |
| 342 | return -1; |
| 343 | } |
| 344 | |
| 345 | static int tcf_ctinfo_walker(struct net *net, struct sk_buff *skb, |
| 346 | struct netlink_callback *cb, int type, |
| 347 | const struct tc_action_ops *ops, |
| 348 | struct netlink_ext_ack *extack) |
| 349 | { |
| 350 | struct tc_action_net *tn = net_generic(net, ctinfo_net_id); |
| 351 | |
| 352 | return tcf_generic_walker(tn, skb, cb, type, ops, extack); |
| 353 | } |
| 354 | |
| 355 | static int tcf_ctinfo_search(struct net *net, struct tc_action **a, u32 index) |
| 356 | { |
| 357 | struct tc_action_net *tn = net_generic(net, ctinfo_net_id); |
| 358 | |
| 359 | return tcf_idr_search(tn, a, index); |
| 360 | } |
| 361 | |
Eric Dumazet | 09d4f10 | 2020-01-18 20:45:06 -0800 | [diff] [blame] | 362 | static void tcf_ctinfo_cleanup(struct tc_action *a) |
| 363 | { |
| 364 | struct tcf_ctinfo *ci = to_ctinfo(a); |
| 365 | struct tcf_ctinfo_params *cp; |
| 366 | |
| 367 | cp = rcu_dereference_protected(ci->params, 1); |
| 368 | if (cp) |
| 369 | kfree_rcu(cp, rcu); |
| 370 | } |
| 371 | |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 372 | static struct tc_action_ops act_ctinfo_ops = { |
| 373 | .kind = "ctinfo", |
| 374 | .id = TCA_ID_CTINFO, |
| 375 | .owner = THIS_MODULE, |
| 376 | .act = tcf_ctinfo_act, |
| 377 | .dump = tcf_ctinfo_dump, |
| 378 | .init = tcf_ctinfo_init, |
Eric Dumazet | 09d4f10 | 2020-01-18 20:45:06 -0800 | [diff] [blame] | 379 | .cleanup= tcf_ctinfo_cleanup, |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 380 | .walk = tcf_ctinfo_walker, |
| 381 | .lookup = tcf_ctinfo_search, |
| 382 | .size = sizeof(struct tcf_ctinfo), |
| 383 | }; |
| 384 | |
| 385 | static __net_init int ctinfo_init_net(struct net *net) |
| 386 | { |
| 387 | struct tc_action_net *tn = net_generic(net, ctinfo_net_id); |
| 388 | |
Cong Wang | 981471bd | 2019-08-25 10:01:32 -0700 | [diff] [blame] | 389 | return tc_action_net_init(net, tn, &act_ctinfo_ops); |
Kevin 'ldir' Darbyshire-Bryant | 24ec483 | 2019-05-28 17:03:50 +0000 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | static void __net_exit ctinfo_exit_net(struct list_head *net_list) |
| 393 | { |
| 394 | tc_action_net_exit(net_list, ctinfo_net_id); |
| 395 | } |
| 396 | |
| 397 | static struct pernet_operations ctinfo_net_ops = { |
| 398 | .init = ctinfo_init_net, |
| 399 | .exit_batch = ctinfo_exit_net, |
| 400 | .id = &ctinfo_net_id, |
| 401 | .size = sizeof(struct tc_action_net), |
| 402 | }; |
| 403 | |
| 404 | static int __init ctinfo_init_module(void) |
| 405 | { |
| 406 | return tcf_register_action(&act_ctinfo_ops, &ctinfo_net_ops); |
| 407 | } |
| 408 | |
| 409 | static void __exit ctinfo_cleanup_module(void) |
| 410 | { |
| 411 | tcf_unregister_action(&act_ctinfo_ops, &ctinfo_net_ops); |
| 412 | } |
| 413 | |
| 414 | module_init(ctinfo_init_module); |
| 415 | module_exit(ctinfo_cleanup_module); |
| 416 | MODULE_AUTHOR("Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>"); |
| 417 | MODULE_DESCRIPTION("Connection tracking mark actions"); |
| 418 | MODULE_LICENSE("GPL"); |