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net/sched/cls_bpf.c
16.9 KB
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// SPDX-License-Identifier: GPL-2.0-only |
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/* * Berkeley Packet Filter based traffic classifier * * Might be used to classify traffic through flexible, user-defined and * possibly JIT-ed BPF filters for traffic control as an alternative to * ematches. * * (C) 2013 Daniel Borkmann <dborkman@redhat.com> |
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*/ #include <linux/module.h> #include <linux/types.h> #include <linux/skbuff.h> #include <linux/filter.h> |
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#include <linux/bpf.h> |
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#include <linux/idr.h> |
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|
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#include <net/rtnetlink.h> #include <net/pkt_cls.h> #include <net/sock.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Daniel Borkmann <dborkman@redhat.com>"); MODULE_DESCRIPTION("TC BPF based classifier"); |
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#define CLS_BPF_NAME_LEN 256 |
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#define CLS_BPF_SUPPORTED_GEN_FLAGS \ |
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(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW) |
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|
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struct cls_bpf_head { struct list_head plist; |
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struct idr handle_idr; |
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struct rcu_head rcu; |
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}; struct cls_bpf_prog { |
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struct bpf_prog *filter; |
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struct list_head link; |
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struct tcf_result res; |
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bool exts_integrated; |
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u32 gen_flags; |
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unsigned int in_hw_count; |
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struct tcf_exts exts; |
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u32 handle; |
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u16 bpf_num_ops; |
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struct sock_filter *bpf_ops; const char *bpf_name; |
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struct tcf_proto *tp; |
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struct rcu_work rwork; |
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}; static const struct nla_policy bpf_policy[TCA_BPF_MAX + 1] = { [TCA_BPF_CLASSID] = { .type = NLA_U32 }, |
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[TCA_BPF_FLAGS] = { .type = NLA_U32 }, |
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[TCA_BPF_FLAGS_GEN] = { .type = NLA_U32 }, |
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[TCA_BPF_FD] = { .type = NLA_U32 }, |
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[TCA_BPF_NAME] = { .type = NLA_NUL_STRING, .len = CLS_BPF_NAME_LEN }, |
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[TCA_BPF_OPS_LEN] = { .type = NLA_U16 }, [TCA_BPF_OPS] = { .type = NLA_BINARY, .len = sizeof(struct sock_filter) * BPF_MAXINSNS }, }; |
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static int cls_bpf_exec_opcode(int code) { switch (code) { case TC_ACT_OK: |
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case TC_ACT_SHOT: |
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case TC_ACT_STOLEN: |
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case TC_ACT_TRAP: |
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case TC_ACT_REDIRECT: |
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case TC_ACT_UNSPEC: return code; default: return TC_ACT_UNSPEC; } } |
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static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res) { |
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struct cls_bpf_head *head = rcu_dereference_bh(tp->root); |
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bool at_ingress = skb_at_tc_ingress(skb); |
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struct cls_bpf_prog *prog; |
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int ret = -1; |
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|
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/* Needed here for accessing maps. */ rcu_read_lock(); |
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list_for_each_entry_rcu(prog, &head->plist, link) { |
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int filter_res; |
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qdisc_skb_cb(skb)->tc_classid = prog->res.classid; |
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if (tc_skip_sw(prog->gen_flags)) { filter_res = prog->exts_integrated ? TC_ACT_UNSPEC : 0; } else if (at_ingress) { |
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/* It is safe to push/pull even if skb_shared() */ __skb_push(skb, skb->mac_len); |
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bpf_compute_data_pointers(skb); |
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filter_res = BPF_PROG_RUN(prog->filter, skb); __skb_pull(skb, skb->mac_len); } else { |
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bpf_compute_data_pointers(skb); |
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filter_res = BPF_PROG_RUN(prog->filter, skb); } |
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|
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if (prog->exts_integrated) { |
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res->class = 0; res->classid = TC_H_MAJ(prog->res.classid) | qdisc_skb_cb(skb)->tc_classid; |
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ret = cls_bpf_exec_opcode(filter_res); if (ret == TC_ACT_UNSPEC) continue; break; } |
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if (filter_res == 0) continue; |
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if (filter_res != -1) { res->class = 0; |
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res->classid = filter_res; |
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} else { *res = prog->res; } |
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ret = tcf_exts_exec(skb, &prog->exts, res); if (ret < 0) continue; |
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break; |
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} |
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rcu_read_unlock(); |
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|
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return ret; |
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} |
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static bool cls_bpf_is_ebpf(const struct cls_bpf_prog *prog) { return !prog->bpf_ops; } |
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static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog, |
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struct cls_bpf_prog *oldprog, struct netlink_ext_ack *extack) |
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{ |
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struct tcf_block *block = tp->chain->block; |
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struct tc_cls_bpf_offload cls_bpf = {}; |
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struct cls_bpf_prog *obj; bool skip_sw; |
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int err; |
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|
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skip_sw = prog && tc_skip_sw(prog->gen_flags); obj = prog ?: oldprog; |
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tc_cls_common_offload_init(&cls_bpf.common, tp, obj->gen_flags, extack); |
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cls_bpf.command = TC_CLSBPF_OFFLOAD; cls_bpf.exts = &obj->exts; cls_bpf.prog = prog ? prog->filter : NULL; cls_bpf.oldprog = oldprog ? oldprog->filter : NULL; cls_bpf.name = obj->bpf_name; cls_bpf.exts_integrated = obj->exts_integrated; |
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|
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if (oldprog && prog) |
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err = tc_setup_cb_replace(block, tp, TC_SETUP_CLSBPF, &cls_bpf, skip_sw, &oldprog->gen_flags, &oldprog->in_hw_count, &prog->gen_flags, &prog->in_hw_count, true); |
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else if (prog) |
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err = tc_setup_cb_add(block, tp, TC_SETUP_CLSBPF, &cls_bpf, skip_sw, &prog->gen_flags, &prog->in_hw_count, true); |
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else err = tc_setup_cb_destroy(block, tp, TC_SETUP_CLSBPF, &cls_bpf, skip_sw, &oldprog->gen_flags, &oldprog->in_hw_count, true); |
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|
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if (prog && err) { cls_bpf_offload_cmd(tp, oldprog, prog, extack); return err; |
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} |
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if (prog && skip_sw && !(prog->gen_flags & TCA_CLS_FLAGS_IN_HW)) |
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return -EINVAL; |
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|
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return 0; |
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} |
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static u32 cls_bpf_flags(u32 flags) { return flags & CLS_BPF_SUPPORTED_GEN_FLAGS; } |
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static int cls_bpf_offload(struct tcf_proto *tp, struct cls_bpf_prog *prog, |
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struct cls_bpf_prog *oldprog, struct netlink_ext_ack *extack) |
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{ |
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if (prog && oldprog && cls_bpf_flags(prog->gen_flags) != cls_bpf_flags(oldprog->gen_flags)) |
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return -EINVAL; |
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|
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if (prog && tc_skip_hw(prog->gen_flags)) prog = NULL; if (oldprog && tc_skip_hw(oldprog->gen_flags)) oldprog = NULL; if (!prog && !oldprog) return 0; |
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|
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return cls_bpf_offload_cmd(tp, prog, oldprog, extack); |
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} static void cls_bpf_stop_offload(struct tcf_proto *tp, |
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struct cls_bpf_prog *prog, struct netlink_ext_ack *extack) |
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{ int err; |
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err = cls_bpf_offload_cmd(tp, NULL, prog, extack); |
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if (err) |
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pr_err("Stopping hardware offload failed: %d ", err); |
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} |
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static void cls_bpf_offload_update_stats(struct tcf_proto *tp, struct cls_bpf_prog *prog) { |
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struct tcf_block *block = tp->chain->block; struct tc_cls_bpf_offload cls_bpf = {}; |
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tc_cls_common_offload_init(&cls_bpf.common, tp, prog->gen_flags, NULL); |
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cls_bpf.command = TC_CLSBPF_STATS; cls_bpf.exts = &prog->exts; cls_bpf.prog = prog->filter; cls_bpf.name = prog->bpf_name; cls_bpf.exts_integrated = prog->exts_integrated; |
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|
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tc_setup_cb_call(block, TC_SETUP_CLSBPF, &cls_bpf, false, true); |
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} |
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static int cls_bpf_init(struct tcf_proto *tp) { struct cls_bpf_head *head; head = kzalloc(sizeof(*head), GFP_KERNEL); if (head == NULL) return -ENOBUFS; |
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INIT_LIST_HEAD_RCU(&head->plist); |
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idr_init(&head->handle_idr); |
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rcu_assign_pointer(tp->root, head); |
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return 0; } |
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static void cls_bpf_free_parms(struct cls_bpf_prog *prog) |
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{ |
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if (cls_bpf_is_ebpf(prog)) bpf_prog_put(prog->filter); else bpf_prog_destroy(prog->filter); |
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|
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kfree(prog->bpf_name); |
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kfree(prog->bpf_ops); |
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} static void __cls_bpf_delete_prog(struct cls_bpf_prog *prog) { tcf_exts_destroy(&prog->exts); tcf_exts_put_net(&prog->exts); cls_bpf_free_parms(prog); |
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kfree(prog); } |
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static void cls_bpf_delete_prog_work(struct work_struct *work) { |
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struct cls_bpf_prog *prog = container_of(to_rcu_work(work), struct cls_bpf_prog, rwork); |
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rtnl_lock(); __cls_bpf_delete_prog(prog); rtnl_unlock(); } |
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static void __cls_bpf_delete(struct tcf_proto *tp, struct cls_bpf_prog *prog, struct netlink_ext_ack *extack) |
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{ |
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struct cls_bpf_head *head = rtnl_dereference(tp->root); |
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idr_remove(&head->handle_idr, prog->handle); |
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cls_bpf_stop_offload(tp, prog, extack); |
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list_del_rcu(&prog->link); tcf_unbind_filter(tp, &prog->res); |
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if (tcf_exts_get_net(&prog->exts)) |
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tcf_queue_work(&prog->rwork, cls_bpf_delete_prog_work); |
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else __cls_bpf_delete_prog(prog); |
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} |
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|
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static int cls_bpf_delete(struct tcf_proto *tp, void *arg, bool *last, |
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bool rtnl_held, struct netlink_ext_ack *extack) |
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{ |
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struct cls_bpf_head *head = rtnl_dereference(tp->root); |
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__cls_bpf_delete(tp, arg, extack); |
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*last = list_empty(&head->plist); |
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return 0; |
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} |
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static void cls_bpf_destroy(struct tcf_proto *tp, bool rtnl_held, |
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struct netlink_ext_ack *extack) |
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{ |
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struct cls_bpf_head *head = rtnl_dereference(tp->root); |
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struct cls_bpf_prog *prog, *tmp; |
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list_for_each_entry_safe(prog, tmp, &head->plist, link) |
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__cls_bpf_delete(tp, prog, extack); |
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|
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idr_destroy(&head->handle_idr); |
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kfree_rcu(head, rcu); |
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} |
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static void *cls_bpf_get(struct tcf_proto *tp, u32 handle) |
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{ |
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struct cls_bpf_head *head = rtnl_dereference(tp->root); |
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struct cls_bpf_prog *prog; |
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|
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list_for_each_entry(prog, &head->plist, link) { |
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if (prog->handle == handle) return prog; |
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} |
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return NULL; |
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} |
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static int cls_bpf_prog_from_ops(struct nlattr **tb, struct cls_bpf_prog *prog) |
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{ |
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struct sock_filter *bpf_ops; |
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struct sock_fprog_kern fprog_tmp; |
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struct bpf_prog *fp; |
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u16 bpf_size, bpf_num_ops; |
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int ret; |
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bpf_num_ops = nla_get_u16(tb[TCA_BPF_OPS_LEN]); |
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if (bpf_num_ops > BPF_MAXINSNS || bpf_num_ops == 0) return -EINVAL; |
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|
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bpf_size = bpf_num_ops * sizeof(*bpf_ops); |
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if (bpf_size != nla_len(tb[TCA_BPF_OPS])) return -EINVAL; |
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|
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bpf_ops = kmemdup(nla_data(tb[TCA_BPF_OPS]), bpf_size, GFP_KERNEL); |
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if (bpf_ops == NULL) return -ENOMEM; |
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|
e2e9b6541 cls_bpf: add init... |
330 331 |
fprog_tmp.len = bpf_num_ops; fprog_tmp.filter = bpf_ops; |
7d1d65cb8 net: sched: cls_b... |
332 |
|
e2e9b6541 cls_bpf: add init... |
333 334 335 336 337 |
ret = bpf_prog_create(&fp, &fprog_tmp); if (ret < 0) { kfree(bpf_ops); return ret; } |
7d1d65cb8 net: sched: cls_b... |
338 |
|
7d1d65cb8 net: sched: cls_b... |
339 |
prog->bpf_ops = bpf_ops; |
e2e9b6541 cls_bpf: add init... |
340 341 |
prog->bpf_num_ops = bpf_num_ops; prog->bpf_name = NULL; |
7d1d65cb8 net: sched: cls_b... |
342 |
prog->filter = fp; |
7d1d65cb8 net: sched: cls_b... |
343 |
|
e2e9b6541 cls_bpf: add init... |
344 345 |
return 0; } |
c46646d04 sched, bpf: add h... |
346 |
static int cls_bpf_prog_from_efd(struct nlattr **tb, struct cls_bpf_prog *prog, |
6c8dfe21c cls_bpf: allow at... |
347 |
u32 gen_flags, const struct tcf_proto *tp) |
e2e9b6541 cls_bpf: add init... |
348 349 350 |
{ struct bpf_prog *fp; char *name = NULL; |
288b3de55 bpf: offload: mov... |
351 |
bool skip_sw; |
e2e9b6541 cls_bpf: add init... |
352 353 354 |
u32 bpf_fd; bpf_fd = nla_get_u32(tb[TCA_BPF_FD]); |
288b3de55 bpf: offload: mov... |
355 |
skip_sw = gen_flags & TCA_CLS_FLAGS_SKIP_SW; |
e2e9b6541 cls_bpf: add init... |
356 |
|
288b3de55 bpf: offload: mov... |
357 |
fp = bpf_prog_get_type_dev(bpf_fd, BPF_PROG_TYPE_SCHED_CLS, skip_sw); |
e2e9b6541 cls_bpf: add init... |
358 359 |
if (IS_ERR(fp)) return PTR_ERR(fp); |
e2e9b6541 cls_bpf: add init... |
360 |
if (tb[TCA_BPF_NAME]) { |
b15ca182e netlink: Add nla_... |
361 |
name = nla_memdup(tb[TCA_BPF_NAME], GFP_KERNEL); |
e2e9b6541 cls_bpf: add init... |
362 363 364 365 366 367 368 |
if (!name) { bpf_prog_put(fp); return -ENOMEM; } } prog->bpf_ops = NULL; |
e2e9b6541 cls_bpf: add init... |
369 |
prog->bpf_name = name; |
e2e9b6541 cls_bpf: add init... |
370 |
prog->filter = fp; |
e2e9b6541 cls_bpf: add init... |
371 |
|
f36fe1c49 net: sched: intro... |
372 373 |
if (fp->dst_needed) tcf_block_netif_keep_dst(tp->chain->block); |
c46646d04 sched, bpf: add h... |
374 |
|
e2e9b6541 cls_bpf: add init... |
375 376 |
return 0; } |
6a725c481 net: sched: cls_b... |
377 378 |
static int cls_bpf_set_parms(struct net *net, struct tcf_proto *tp, struct cls_bpf_prog *prog, unsigned long base, |
50a561900 net: sched: cls: ... |
379 380 |
struct nlattr **tb, struct nlattr *est, bool ovr, struct netlink_ext_ack *extack) |
e2e9b6541 cls_bpf: add init... |
381 |
{ |
045efa82f cls_bpf: introduc... |
382 |
bool is_bpf, is_ebpf, have_exts = false; |
0d01d45f1 net: cls_bpf: lim... |
383 |
u32 gen_flags = 0; |
e2e9b6541 cls_bpf: add init... |
384 385 386 387 |
int ret; is_bpf = tb[TCA_BPF_OPS_LEN] && tb[TCA_BPF_OPS]; is_ebpf = tb[TCA_BPF_FD]; |
ef146fa40 cls_bpf: make bin... |
388 |
if ((!is_bpf && !is_ebpf) || (is_bpf && is_ebpf)) |
e2e9b6541 cls_bpf: add init... |
389 |
return -EINVAL; |
ec6743a10 net: sched: track... |
390 391 |
ret = tcf_exts_validate(net, tp, tb, est, &prog->exts, ovr, true, extack); |
e2e9b6541 cls_bpf: add init... |
392 393 |
if (ret < 0) return ret; |
045efa82f cls_bpf: introduc... |
394 395 |
if (tb[TCA_BPF_FLAGS]) { u32 bpf_flags = nla_get_u32(tb[TCA_BPF_FLAGS]); |
6839da326 net: sched: cls_b... |
396 397 |
if (bpf_flags & ~TCA_BPF_FLAG_ACT_DIRECT) return -EINVAL; |
045efa82f cls_bpf: introduc... |
398 399 400 |
have_exts = bpf_flags & TCA_BPF_FLAG_ACT_DIRECT; } |
0d01d45f1 net: cls_bpf: lim... |
401 402 403 |
if (tb[TCA_BPF_FLAGS_GEN]) { gen_flags = nla_get_u32(tb[TCA_BPF_FLAGS_GEN]); if (gen_flags & ~CLS_BPF_SUPPORTED_GEN_FLAGS || |
6839da326 net: sched: cls_b... |
404 405 |
!tc_flags_valid(gen_flags)) return -EINVAL; |
0d01d45f1 net: cls_bpf: lim... |
406 |
} |
045efa82f cls_bpf: introduc... |
407 |
|
045efa82f cls_bpf: introduc... |
408 |
prog->exts_integrated = have_exts; |
0d01d45f1 net: cls_bpf: lim... |
409 |
prog->gen_flags = gen_flags; |
e2e9b6541 cls_bpf: add init... |
410 |
|
045efa82f cls_bpf: introduc... |
411 |
ret = is_bpf ? cls_bpf_prog_from_ops(tb, prog) : |
6c8dfe21c cls_bpf: allow at... |
412 |
cls_bpf_prog_from_efd(tb, prog, gen_flags, tp); |
b9a24bb76 net_sched: proper... |
413 |
if (ret < 0) |
6839da326 net: sched: cls_b... |
414 |
return ret; |
e2e9b6541 cls_bpf: add init... |
415 |
|
ef146fa40 cls_bpf: make bin... |
416 417 418 419 |
if (tb[TCA_BPF_CLASSID]) { prog->res.classid = nla_get_u32(tb[TCA_BPF_CLASSID]); tcf_bind_filter(tp, &prog->res, base); } |
7d1d65cb8 net: sched: cls_b... |
420 |
|
7d1d65cb8 net: sched: cls_b... |
421 |
return 0; |
7d1d65cb8 net: sched: cls_b... |
422 |
} |
7d1d65cb8 net: sched: cls_b... |
423 424 425 |
static int cls_bpf_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, struct nlattr **tca, |
12db03b65 net: sched: exten... |
426 427 |
void **arg, bool ovr, bool rtnl_held, struct netlink_ext_ack *extack) |
7d1d65cb8 net: sched: cls_b... |
428 |
{ |
1f947bf15 net: sched: rcu'i... |
429 |
struct cls_bpf_head *head = rtnl_dereference(tp->root); |
8113c0956 net_sched: use vo... |
430 |
struct cls_bpf_prog *oldprog = *arg; |
7d1d65cb8 net: sched: cls_b... |
431 |
struct nlattr *tb[TCA_BPF_MAX + 1]; |
1f947bf15 net: sched: rcu'i... |
432 |
struct cls_bpf_prog *prog; |
7d1d65cb8 net: sched: cls_b... |
433 434 435 436 |
int ret; if (tca[TCA_OPTIONS] == NULL) return -EINVAL; |
8cb081746 netlink: make val... |
437 438 |
ret = nla_parse_nested_deprecated(tb, TCA_BPF_MAX, tca[TCA_OPTIONS], bpf_policy, NULL); |
7d1d65cb8 net: sched: cls_b... |
439 440 |
if (ret < 0) return ret; |
7d1d65cb8 net: sched: cls_b... |
441 |
prog = kzalloc(sizeof(*prog), GFP_KERNEL); |
1f947bf15 net: sched: rcu'i... |
442 |
if (!prog) |
7d1d65cb8 net: sched: cls_b... |
443 |
return -ENOBUFS; |
14215108a net_sched: initia... |
444 |
ret = tcf_exts_init(&prog->exts, net, TCA_BPF_ACT, TCA_BPF_POLICE); |
b9a24bb76 net_sched: proper... |
445 446 |
if (ret < 0) goto errout; |
1f947bf15 net: sched: rcu'i... |
447 448 449 450 451 452 453 |
if (oldprog) { if (handle && oldprog->handle != handle) { ret = -EINVAL; goto errout; } } |
76cf546c2 net_sched: use id... |
454 |
if (handle == 0) { |
0b4ce8da7 cls_bpf: Convert ... |
455 456 457 458 459 460 |
handle = 1; ret = idr_alloc_u32(&head->handle_idr, prog, &handle, INT_MAX, GFP_KERNEL); } else if (!oldprog) { ret = idr_alloc_u32(&head->handle_idr, prog, &handle, handle, GFP_KERNEL); |
7d1d65cb8 net: sched: cls_b... |
461 |
} |
0b4ce8da7 cls_bpf: Convert ... |
462 463 464 |
if (ret) goto errout; prog->handle = handle; |
50a561900 net: sched: cls: ... |
465 466 |
ret = cls_bpf_set_parms(net, tp, prog, base, tb, tca[TCA_RATE], ovr, extack); |
7d1d65cb8 net: sched: cls_b... |
467 |
if (ret < 0) |
76cf546c2 net_sched: use id... |
468 |
goto errout_idr; |
7d1d65cb8 net: sched: cls_b... |
469 |
|
631f65ff2 net: sched: cls_b... |
470 |
ret = cls_bpf_offload(tp, prog, oldprog, extack); |
25415cec5 cls_bpf: don't de... |
471 472 |
if (ret) goto errout_parms; |
332ae8e2f net: cls_bpf: add... |
473 |
|
5cecb6cc0 net/sched: cls_bp... |
474 475 |
if (!tc_in_hw(prog->gen_flags)) prog->gen_flags |= TCA_CLS_FLAGS_NOT_IN_HW; |
1f947bf15 net: sched: rcu'i... |
476 |
if (oldprog) { |
234a4624e idr: Delete idr_r... |
477 |
idr_replace(&head->handle_idr, prog, handle); |
f6bfc46da sched: cls_bpf: f... |
478 |
list_replace_rcu(&oldprog->link, &prog->link); |
18cdb37eb net: sched: do no... |
479 |
tcf_unbind_filter(tp, &oldprog->res); |
aae2c35ec cls_bpf: use tcf_... |
480 |
tcf_exts_get_net(&oldprog->exts); |
aaa908ffb net_sched: switch... |
481 |
tcf_queue_work(&oldprog->rwork, cls_bpf_delete_prog_work); |
1f947bf15 net: sched: rcu'i... |
482 483 484 |
} else { list_add_rcu(&prog->link, &head->plist); } |
7d1d65cb8 net: sched: cls_b... |
485 |
|
8113c0956 net_sched: use vo... |
486 |
*arg = prog; |
7d1d65cb8 net: sched: cls_b... |
487 |
return 0; |
b9a24bb76 net_sched: proper... |
488 |
|
25415cec5 cls_bpf: don't de... |
489 490 |
errout_parms: cls_bpf_free_parms(prog); |
76cf546c2 net_sched: use id... |
491 492 |
errout_idr: if (!oldprog) |
9c1609414 idr: Delete idr_r... |
493 |
idr_remove(&head->handle_idr, prog->handle); |
7d1d65cb8 net: sched: cls_b... |
494 |
errout: |
b9a24bb76 net_sched: proper... |
495 |
tcf_exts_destroy(&prog->exts); |
1f947bf15 net: sched: rcu'i... |
496 |
kfree(prog); |
7d1d65cb8 net: sched: cls_b... |
497 498 |
return ret; } |
e2e9b6541 cls_bpf: add init... |
499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 |
static int cls_bpf_dump_bpf_info(const struct cls_bpf_prog *prog, struct sk_buff *skb) { struct nlattr *nla; if (nla_put_u16(skb, TCA_BPF_OPS_LEN, prog->bpf_num_ops)) return -EMSGSIZE; nla = nla_reserve(skb, TCA_BPF_OPS, prog->bpf_num_ops * sizeof(struct sock_filter)); if (nla == NULL) return -EMSGSIZE; memcpy(nla_data(nla), prog->bpf_ops, nla_len(nla)); return 0; } static int cls_bpf_dump_ebpf_info(const struct cls_bpf_prog *prog, struct sk_buff *skb) { |
7bd509e31 bpf: add prog_dig... |
520 |
struct nlattr *nla; |
e2e9b6541 cls_bpf: add init... |
521 522 523 |
if (prog->bpf_name && nla_put_string(skb, TCA_BPF_NAME, prog->bpf_name)) return -EMSGSIZE; |
e86283071 bpf: expose prog ... |
524 525 |
if (nla_put_u32(skb, TCA_BPF_ID, prog->filter->aux->id)) return -EMSGSIZE; |
f1f7714ea bpf: rework prog_... |
526 |
nla = nla_reserve(skb, TCA_BPF_TAG, sizeof(prog->filter->tag)); |
7bd509e31 bpf: add prog_dig... |
527 528 |
if (nla == NULL) return -EMSGSIZE; |
f1f7714ea bpf: rework prog_... |
529 |
memcpy(nla_data(nla), prog->filter->tag, nla_len(nla)); |
7bd509e31 bpf: add prog_dig... |
530 |
|
e2e9b6541 cls_bpf: add init... |
531 532 |
return 0; } |
8113c0956 net_sched: use vo... |
533 |
static int cls_bpf_dump(struct net *net, struct tcf_proto *tp, void *fh, |
12db03b65 net: sched: exten... |
534 |
struct sk_buff *skb, struct tcmsg *tm, bool rtnl_held) |
7d1d65cb8 net: sched: cls_b... |
535 |
{ |
8113c0956 net_sched: use vo... |
536 |
struct cls_bpf_prog *prog = fh; |
e2e9b6541 cls_bpf: add init... |
537 |
struct nlattr *nest; |
bf007d1c7 cls_bpf: also dum... |
538 |
u32 bpf_flags = 0; |
e2e9b6541 cls_bpf: add init... |
539 |
int ret; |
7d1d65cb8 net: sched: cls_b... |
540 541 542 543 544 |
if (prog == NULL) return skb->len; tm->tcm_handle = prog->handle; |
68d640630 net: cls_bpf: all... |
545 |
cls_bpf_offload_update_stats(tp, prog); |
ae0be8de9 netlink: make nla... |
546 |
nest = nla_nest_start_noflag(skb, TCA_OPTIONS); |
7d1d65cb8 net: sched: cls_b... |
547 548 |
if (nest == NULL) goto nla_put_failure; |
ef146fa40 cls_bpf: make bin... |
549 550 |
if (prog->res.classid && nla_put_u32(skb, TCA_BPF_CLASSID, prog->res.classid)) |
7d1d65cb8 net: sched: cls_b... |
551 |
goto nla_put_failure; |
7d1d65cb8 net: sched: cls_b... |
552 |
|
e2e9b6541 cls_bpf: add init... |
553 554 555 556 557 |
if (cls_bpf_is_ebpf(prog)) ret = cls_bpf_dump_ebpf_info(prog, skb); else ret = cls_bpf_dump_bpf_info(prog, skb); if (ret) |
7d1d65cb8 net: sched: cls_b... |
558 |
goto nla_put_failure; |
5da57f422 net_sched: cls: r... |
559 |
if (tcf_exts_dump(skb, &prog->exts) < 0) |
7d1d65cb8 net: sched: cls_b... |
560 |
goto nla_put_failure; |
bf007d1c7 cls_bpf: also dum... |
561 562 563 564 |
if (prog->exts_integrated) bpf_flags |= TCA_BPF_FLAG_ACT_DIRECT; if (bpf_flags && nla_put_u32(skb, TCA_BPF_FLAGS, bpf_flags)) goto nla_put_failure; |
0d01d45f1 net: cls_bpf: lim... |
565 566 567 |
if (prog->gen_flags && nla_put_u32(skb, TCA_BPF_FLAGS_GEN, prog->gen_flags)) goto nla_put_failure; |
bf007d1c7 cls_bpf: also dum... |
568 |
|
7d1d65cb8 net: sched: cls_b... |
569 |
nla_nest_end(skb, nest); |
5da57f422 net_sched: cls: r... |
570 |
if (tcf_exts_dump_stats(skb, &prog->exts) < 0) |
7d1d65cb8 net: sched: cls_b... |
571 572 573 574 575 576 577 578 |
goto nla_put_failure; return skb->len; nla_put_failure: nla_nest_cancel(skb, nest); return -1; } |
2e24cd755 net_sched: fix op... |
579 580 |
static void cls_bpf_bind_class(void *fh, u32 classid, unsigned long cl, void *q, unsigned long base) |
07d79fc7d net_sched: add re... |
581 582 |
{ struct cls_bpf_prog *prog = fh; |
2e24cd755 net_sched: fix op... |
583 584 585 586 587 588 |
if (prog && prog->res.classid == classid) { if (cl) __tcf_bind_filter(q, &prog->res, base); else __tcf_unbind_filter(q, &prog->res); } |
07d79fc7d net_sched: add re... |
589 |
} |
12db03b65 net: sched: exten... |
590 591 |
static void cls_bpf_walk(struct tcf_proto *tp, struct tcf_walker *arg, bool rtnl_held) |
7d1d65cb8 net: sched: cls_b... |
592 |
{ |
1f947bf15 net: sched: rcu'i... |
593 |
struct cls_bpf_head *head = rtnl_dereference(tp->root); |
7d1d65cb8 net: sched: cls_b... |
594 |
struct cls_bpf_prog *prog; |
3fe6b49e2 net_sched: cls_bp... |
595 |
list_for_each_entry(prog, &head->plist, link) { |
7d1d65cb8 net: sched: cls_b... |
596 597 |
if (arg->count < arg->skip) goto skip; |
8113c0956 net_sched: use vo... |
598 |
if (arg->fn(tp, prog, arg) < 0) { |
7d1d65cb8 net: sched: cls_b... |
599 600 601 602 603 604 605 |
arg->stop = 1; break; } skip: arg->count++; } } |
a73233115 net: flow_offload... |
606 |
static int cls_bpf_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, |
7e916b768 net: sched: cls_b... |
607 608 609 610 611 612 613 614 615 616 617 618 619 |
void *cb_priv, struct netlink_ext_ack *extack) { struct cls_bpf_head *head = rtnl_dereference(tp->root); struct tcf_block *block = tp->chain->block; struct tc_cls_bpf_offload cls_bpf = {}; struct cls_bpf_prog *prog; int err; list_for_each_entry(prog, &head->plist, link) { if (tc_skip_hw(prog->gen_flags)) continue; tc_cls_common_offload_init(&cls_bpf.common, tp, prog->gen_flags, |
d6787147e net/sched: remove... |
620 |
extack); |
7e916b768 net: sched: cls_b... |
621 622 623 624 625 626 |
cls_bpf.command = TC_CLSBPF_OFFLOAD; cls_bpf.exts = &prog->exts; cls_bpf.prog = add ? prog->filter : NULL; cls_bpf.oldprog = add ? NULL : prog->filter; cls_bpf.name = prog->bpf_name; cls_bpf.exts_integrated = prog->exts_integrated; |
401192113 net: sched: refac... |
627 628 629 630 631 |
err = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSBPF, &cls_bpf, cb_priv, &prog->gen_flags, &prog->in_hw_count); if (err) return err; |
7e916b768 net: sched: cls_b... |
632 633 634 635 |
} return 0; } |
7d1d65cb8 net: sched: cls_b... |
636 637 638 639 640 641 642 |
static struct tcf_proto_ops cls_bpf_ops __read_mostly = { .kind = "bpf", .owner = THIS_MODULE, .classify = cls_bpf_classify, .init = cls_bpf_init, .destroy = cls_bpf_destroy, .get = cls_bpf_get, |
7d1d65cb8 net: sched: cls_b... |
643 644 645 |
.change = cls_bpf_change, .delete = cls_bpf_delete, .walk = cls_bpf_walk, |
7e916b768 net: sched: cls_b... |
646 |
.reoffload = cls_bpf_reoffload, |
7d1d65cb8 net: sched: cls_b... |
647 |
.dump = cls_bpf_dump, |
07d79fc7d net_sched: add re... |
648 |
.bind_class = cls_bpf_bind_class, |
7d1d65cb8 net: sched: cls_b... |
649 650 651 652 653 654 655 656 657 658 659 660 661 662 |
}; static int __init cls_bpf_init_mod(void) { return register_tcf_proto_ops(&cls_bpf_ops); } static void __exit cls_bpf_exit_mod(void) { unregister_tcf_proto_ops(&cls_bpf_ops); } module_init(cls_bpf_init_mod); module_exit(cls_bpf_exit_mod); |