^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) * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/filter.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <net/pkt_sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <net/pkt_cls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/tc_act/tc_bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/tc_act/tc_bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define ACT_BPF_NAME_LEN 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct tcf_bpf_cfg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct bpf_prog *filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct sock_filter *bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) const char *bpf_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u16 bpf_num_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) bool is_ebpf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static unsigned int bpf_net_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static struct tc_action_ops act_bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int tcf_bpf_act(struct sk_buff *skb, const struct tc_action *act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct tcf_result *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) bool at_ingress = skb_at_tc_ingress(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct tcf_bpf *prog = to_bpf(act);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct bpf_prog *filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int action, filter_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) tcf_lastuse_update(&prog->tcf_tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) bstats_cpu_update(this_cpu_ptr(prog->common.cpu_bstats), skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) filter = rcu_dereference(prog->filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (at_ingress) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) __skb_push(skb, skb->mac_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) bpf_compute_data_pointers(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) filter_res = BPF_PROG_RUN(filter, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) __skb_pull(skb, skb->mac_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) bpf_compute_data_pointers(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) filter_res = BPF_PROG_RUN(filter, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (skb_sk_is_prefetched(skb) && filter_res != TC_ACT_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) skb_orphan(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* A BPF program may overwrite the default action opcode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Similarly as in cls_bpf, if filter_res == -1 we use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * default action specified from tc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * In case a different well-known TC_ACT opcode has been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * returned, it will overwrite the default one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * For everything else that is unkown, TC_ACT_UNSPEC is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) switch (filter_res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) case TC_ACT_PIPE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) case TC_ACT_RECLASSIFY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) case TC_ACT_OK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) case TC_ACT_REDIRECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) action = filter_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) case TC_ACT_SHOT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) action = filter_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) qstats_drop_inc(this_cpu_ptr(prog->common.cpu_qstats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) case TC_ACT_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) action = prog->tcf_action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) action = TC_ACT_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static bool tcf_bpf_is_ebpf(const struct tcf_bpf *prog)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return !prog->bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static int tcf_bpf_dump_bpf_info(const struct tcf_bpf *prog,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct nlattr *nla;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (nla_put_u16(skb, TCA_ACT_BPF_OPS_LEN, prog->bpf_num_ops))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) nla = nla_reserve(skb, TCA_ACT_BPF_OPS, prog->bpf_num_ops *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) sizeof(struct sock_filter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (nla == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) memcpy(nla_data(nla), prog->bpf_ops, nla_len(nla));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int tcf_bpf_dump_ebpf_info(const struct tcf_bpf *prog,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct nlattr *nla;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (prog->bpf_name &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) nla_put_string(skb, TCA_ACT_BPF_NAME, prog->bpf_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (nla_put_u32(skb, TCA_ACT_BPF_ID, prog->filter->aux->id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) nla = nla_reserve(skb, TCA_ACT_BPF_TAG, sizeof(prog->filter->tag));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (nla == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) memcpy(nla_data(nla), prog->filter->tag, nla_len(nla));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int tcf_bpf_dump(struct sk_buff *skb, struct tc_action *act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int bind, int ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) unsigned char *tp = skb_tail_pointer(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct tcf_bpf *prog = to_bpf(act);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct tc_act_bpf opt = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .index = prog->tcf_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .refcnt = refcount_read(&prog->tcf_refcnt) - ref,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .bindcnt = atomic_read(&prog->tcf_bindcnt) - bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct tcf_t tm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) spin_lock_bh(&prog->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) opt.action = prog->tcf_action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (nla_put(skb, TCA_ACT_BPF_PARMS, sizeof(opt), &opt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (tcf_bpf_is_ebpf(prog))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) ret = tcf_bpf_dump_ebpf_info(prog, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ret = tcf_bpf_dump_bpf_info(prog, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) tcf_tm_dump(&tm, &prog->tcf_tm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (nla_put_64bit(skb, TCA_ACT_BPF_TM, sizeof(tm), &tm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) TCA_ACT_BPF_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) spin_unlock_bh(&prog->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) spin_unlock_bh(&prog->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) nlmsg_trim(skb, tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static const struct nla_policy act_bpf_policy[TCA_ACT_BPF_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) [TCA_ACT_BPF_PARMS] = { .len = sizeof(struct tc_act_bpf) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) [TCA_ACT_BPF_FD] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) [TCA_ACT_BPF_NAME] = { .type = NLA_NUL_STRING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) .len = ACT_BPF_NAME_LEN },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) [TCA_ACT_BPF_OPS_LEN] = { .type = NLA_U16 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) [TCA_ACT_BPF_OPS] = { .type = NLA_BINARY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .len = sizeof(struct sock_filter) * BPF_MAXINSNS },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int tcf_bpf_init_from_ops(struct nlattr **tb, struct tcf_bpf_cfg *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct sock_filter *bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct sock_fprog_kern fprog_tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct bpf_prog *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) u16 bpf_size, bpf_num_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) bpf_num_ops = nla_get_u16(tb[TCA_ACT_BPF_OPS_LEN]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (bpf_num_ops > BPF_MAXINSNS || bpf_num_ops == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) bpf_size = bpf_num_ops * sizeof(*bpf_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (bpf_size != nla_len(tb[TCA_ACT_BPF_OPS]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) bpf_ops = kmemdup(nla_data(tb[TCA_ACT_BPF_OPS]), bpf_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (bpf_ops == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) fprog_tmp.len = bpf_num_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) fprog_tmp.filter = bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) ret = bpf_prog_create(&fp, &fprog_tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) kfree(bpf_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) cfg->bpf_ops = bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) cfg->bpf_num_ops = bpf_num_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) cfg->filter = fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) cfg->is_ebpf = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int tcf_bpf_init_from_efd(struct nlattr **tb, struct tcf_bpf_cfg *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct bpf_prog *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) char *name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) u32 bpf_fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) bpf_fd = nla_get_u32(tb[TCA_ACT_BPF_FD]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) fp = bpf_prog_get_type(bpf_fd, BPF_PROG_TYPE_SCHED_ACT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (IS_ERR(fp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return PTR_ERR(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (tb[TCA_ACT_BPF_NAME]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) name = nla_memdup(tb[TCA_ACT_BPF_NAME], GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (!name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) bpf_prog_put(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) cfg->bpf_name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) cfg->filter = fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) cfg->is_ebpf = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static void tcf_bpf_cfg_cleanup(const struct tcf_bpf_cfg *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct bpf_prog *filter = cfg->filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (filter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (cfg->is_ebpf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) bpf_prog_put(filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) bpf_prog_destroy(filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) kfree(cfg->bpf_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) kfree(cfg->bpf_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static void tcf_bpf_prog_fill_cfg(const struct tcf_bpf *prog,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct tcf_bpf_cfg *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) cfg->is_ebpf = tcf_bpf_is_ebpf(prog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /* updates to prog->filter are prevented, since it's called either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * with tcf lock or during final cleanup in rcu callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) cfg->filter = rcu_dereference_protected(prog->filter, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) cfg->bpf_ops = prog->bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) cfg->bpf_name = prog->bpf_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static int tcf_bpf_init(struct net *net, struct nlattr *nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct nlattr *est, struct tc_action **act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int replace, int bind, bool rtnl_held,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct tcf_proto *tp, u32 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct tc_action_net *tn = net_generic(net, bpf_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct nlattr *tb[TCA_ACT_BPF_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct tcf_chain *goto_ch = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct tcf_bpf_cfg cfg, old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct tc_act_bpf *parm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct tcf_bpf *prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) bool is_bpf, is_ebpf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int ret, res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) u32 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) ret = nla_parse_nested_deprecated(tb, TCA_ACT_BPF_MAX, nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) act_bpf_policy, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!tb[TCA_ACT_BPF_PARMS])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) parm = nla_data(tb[TCA_ACT_BPF_PARMS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) index = parm->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) ret = tcf_idr_check_alloc(tn, &index, act, bind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) ret = tcf_idr_create(tn, index, est, act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) &act_bpf_ops, bind, true, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) tcf_idr_cleanup(tn, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) res = ACT_P_CREATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) } else if (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Don't override defaults. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (bind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (!replace) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) tcf_idr_release(*act, bind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) ret = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) goto release_idr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) is_bpf = tb[TCA_ACT_BPF_OPS_LEN] && tb[TCA_ACT_BPF_OPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) is_ebpf = tb[TCA_ACT_BPF_FD];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if ((!is_bpf && !is_ebpf) || (is_bpf && is_ebpf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) goto put_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) memset(&cfg, 0, sizeof(cfg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) ret = is_bpf ? tcf_bpf_init_from_ops(tb, &cfg) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) tcf_bpf_init_from_efd(tb, &cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) goto put_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) prog = to_bpf(*act);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) spin_lock_bh(&prog->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (res != ACT_P_CREATED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) tcf_bpf_prog_fill_cfg(prog, &old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) prog->bpf_ops = cfg.bpf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) prog->bpf_name = cfg.bpf_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (cfg.bpf_num_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) prog->bpf_num_ops = cfg.bpf_num_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) goto_ch = tcf_action_set_ctrlact(*act, parm->action, goto_ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) rcu_assign_pointer(prog->filter, cfg.filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) spin_unlock_bh(&prog->tcf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (goto_ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) tcf_chain_put_by_act(goto_ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (res != ACT_P_CREATED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /* make sure the program being replaced is no longer executing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) tcf_bpf_cfg_cleanup(&old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) put_chain:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if (goto_ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) tcf_chain_put_by_act(goto_ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) release_idr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) tcf_idr_release(*act, bind);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static void tcf_bpf_cleanup(struct tc_action *act)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct tcf_bpf_cfg tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) tcf_bpf_prog_fill_cfg(to_bpf(act), &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) tcf_bpf_cfg_cleanup(&tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static int tcf_bpf_walker(struct net *net, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct netlink_callback *cb, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) const struct tc_action_ops *ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct tc_action_net *tn = net_generic(net, bpf_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return tcf_generic_walker(tn, skb, cb, type, ops, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static int tcf_bpf_search(struct net *net, struct tc_action **a, u32 index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) struct tc_action_net *tn = net_generic(net, bpf_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return tcf_idr_search(tn, a, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static struct tc_action_ops act_bpf_ops __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) .kind = "bpf",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) .id = TCA_ID_BPF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) .act = tcf_bpf_act,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) .dump = tcf_bpf_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) .cleanup = tcf_bpf_cleanup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) .init = tcf_bpf_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) .walk = tcf_bpf_walker,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) .lookup = tcf_bpf_search,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) .size = sizeof(struct tcf_bpf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static __net_init int bpf_init_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct tc_action_net *tn = net_generic(net, bpf_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return tc_action_net_init(net, tn, &act_bpf_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) static void __net_exit bpf_exit_net(struct list_head *net_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) tc_action_net_exit(net_list, bpf_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) static struct pernet_operations bpf_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) .init = bpf_init_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) .exit_batch = bpf_exit_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) .id = &bpf_net_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) .size = sizeof(struct tc_action_net),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static int __init bpf_init_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) return tcf_register_action(&act_bpf_ops, &bpf_net_ops);
^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 void __exit bpf_cleanup_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) tcf_unregister_action(&act_bpf_ops, &bpf_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) module_init(bpf_init_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) module_exit(bpf_cleanup_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) MODULE_DESCRIPTION("TC BPF based action");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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