v4.19.13 snapshot.
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
new file mode 100644
index 0000000..fa6fe2f
--- /dev/null
+++ b/net/sched/cls_bpf.c
@@ -0,0 +1,717 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/filter.h>
+#include <linux/bpf.h>
+#include <linux/idr.h>
+
+#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");
+
+#define CLS_BPF_NAME_LEN 256
+#define CLS_BPF_SUPPORTED_GEN_FLAGS \
+ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)
+
+struct cls_bpf_head {
+ struct list_head plist;
+ struct idr handle_idr;
+ struct rcu_head rcu;
+};
+
+struct cls_bpf_prog {
+ struct bpf_prog *filter;
+ struct list_head link;
+ struct tcf_result res;
+ bool exts_integrated;
+ u32 gen_flags;
+ unsigned int in_hw_count;
+ struct tcf_exts exts;
+ u32 handle;
+ u16 bpf_num_ops;
+ struct sock_filter *bpf_ops;
+ const char *bpf_name;
+ struct tcf_proto *tp;
+ struct rcu_work rwork;
+};
+
+static const struct nla_policy bpf_policy[TCA_BPF_MAX + 1] = {
+ [TCA_BPF_CLASSID] = { .type = NLA_U32 },
+ [TCA_BPF_FLAGS] = { .type = NLA_U32 },
+ [TCA_BPF_FLAGS_GEN] = { .type = NLA_U32 },
+ [TCA_BPF_FD] = { .type = NLA_U32 },
+ [TCA_BPF_NAME] = { .type = NLA_NUL_STRING,
+ .len = CLS_BPF_NAME_LEN },
+ [TCA_BPF_OPS_LEN] = { .type = NLA_U16 },
+ [TCA_BPF_OPS] = { .type = NLA_BINARY,
+ .len = sizeof(struct sock_filter) * BPF_MAXINSNS },
+};
+
+static int cls_bpf_exec_opcode(int code)
+{
+ switch (code) {
+ case TC_ACT_OK:
+ case TC_ACT_SHOT:
+ case TC_ACT_STOLEN:
+ case TC_ACT_TRAP:
+ case TC_ACT_REDIRECT:
+ case TC_ACT_UNSPEC:
+ return code;
+ default:
+ return TC_ACT_UNSPEC;
+ }
+}
+
+static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+ struct tcf_result *res)
+{
+ struct cls_bpf_head *head = rcu_dereference_bh(tp->root);
+ bool at_ingress = skb_at_tc_ingress(skb);
+ struct cls_bpf_prog *prog;
+ int ret = -1;
+
+ /* Needed here for accessing maps. */
+ rcu_read_lock();
+ list_for_each_entry_rcu(prog, &head->plist, link) {
+ int filter_res;
+
+ qdisc_skb_cb(skb)->tc_classid = prog->res.classid;
+
+ if (tc_skip_sw(prog->gen_flags)) {
+ filter_res = prog->exts_integrated ? TC_ACT_UNSPEC : 0;
+ } else if (at_ingress) {
+ /* It is safe to push/pull even if skb_shared() */
+ __skb_push(skb, skb->mac_len);
+ bpf_compute_data_pointers(skb);
+ filter_res = BPF_PROG_RUN(prog->filter, skb);
+ __skb_pull(skb, skb->mac_len);
+ } else {
+ bpf_compute_data_pointers(skb);
+ filter_res = BPF_PROG_RUN(prog->filter, skb);
+ }
+
+ if (prog->exts_integrated) {
+ res->class = 0;
+ res->classid = TC_H_MAJ(prog->res.classid) |
+ qdisc_skb_cb(skb)->tc_classid;
+
+ ret = cls_bpf_exec_opcode(filter_res);
+ if (ret == TC_ACT_UNSPEC)
+ continue;
+ break;
+ }
+
+ if (filter_res == 0)
+ continue;
+ if (filter_res != -1) {
+ res->class = 0;
+ res->classid = filter_res;
+ } else {
+ *res = prog->res;
+ }
+
+ ret = tcf_exts_exec(skb, &prog->exts, res);
+ if (ret < 0)
+ continue;
+
+ break;
+ }
+ rcu_read_unlock();
+
+ return ret;
+}
+
+static bool cls_bpf_is_ebpf(const struct cls_bpf_prog *prog)
+{
+ return !prog->bpf_ops;
+}
+
+static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog,
+ struct cls_bpf_prog *oldprog,
+ struct netlink_ext_ack *extack)
+{
+ struct tcf_block *block = tp->chain->block;
+ struct tc_cls_bpf_offload cls_bpf = {};
+ struct cls_bpf_prog *obj;
+ bool skip_sw;
+ int err;
+
+ skip_sw = prog && tc_skip_sw(prog->gen_flags);
+ obj = prog ?: oldprog;
+
+ tc_cls_common_offload_init(&cls_bpf.common, tp, obj->gen_flags,
+ extack);
+ 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;
+
+ if (oldprog)
+ tcf_block_offload_dec(block, &oldprog->gen_flags);
+
+ err = tc_setup_cb_call(block, NULL, TC_SETUP_CLSBPF, &cls_bpf, skip_sw);
+ if (prog) {
+ if (err < 0) {
+ cls_bpf_offload_cmd(tp, oldprog, prog, extack);
+ return err;
+ } else if (err > 0) {
+ prog->in_hw_count = err;
+ tcf_block_offload_inc(block, &prog->gen_flags);
+ }
+ }
+
+ if (prog && skip_sw && !(prog->gen_flags & TCA_CLS_FLAGS_IN_HW))
+ return -EINVAL;
+
+ return 0;
+}
+
+static u32 cls_bpf_flags(u32 flags)
+{
+ return flags & CLS_BPF_SUPPORTED_GEN_FLAGS;
+}
+
+static int cls_bpf_offload(struct tcf_proto *tp, struct cls_bpf_prog *prog,
+ struct cls_bpf_prog *oldprog,
+ struct netlink_ext_ack *extack)
+{
+ if (prog && oldprog &&
+ cls_bpf_flags(prog->gen_flags) !=
+ cls_bpf_flags(oldprog->gen_flags))
+ return -EINVAL;
+
+ 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;
+
+ return cls_bpf_offload_cmd(tp, prog, oldprog, extack);
+}
+
+static void cls_bpf_stop_offload(struct tcf_proto *tp,
+ struct cls_bpf_prog *prog,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ err = cls_bpf_offload_cmd(tp, NULL, prog, extack);
+ if (err)
+ pr_err("Stopping hardware offload failed: %d\n", err);
+}
+
+static void cls_bpf_offload_update_stats(struct tcf_proto *tp,
+ struct cls_bpf_prog *prog)
+{
+ struct tcf_block *block = tp->chain->block;
+ struct tc_cls_bpf_offload cls_bpf = {};
+
+ tc_cls_common_offload_init(&cls_bpf.common, tp, prog->gen_flags, NULL);
+ 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;
+
+ tc_setup_cb_call(block, NULL, TC_SETUP_CLSBPF, &cls_bpf, false);
+}
+
+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;
+
+ INIT_LIST_HEAD_RCU(&head->plist);
+ idr_init(&head->handle_idr);
+ rcu_assign_pointer(tp->root, head);
+
+ return 0;
+}
+
+static void cls_bpf_free_parms(struct cls_bpf_prog *prog)
+{
+ if (cls_bpf_is_ebpf(prog))
+ bpf_prog_put(prog->filter);
+ else
+ bpf_prog_destroy(prog->filter);
+
+ kfree(prog->bpf_name);
+ kfree(prog->bpf_ops);
+}
+
+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);
+ kfree(prog);
+}
+
+static void cls_bpf_delete_prog_work(struct work_struct *work)
+{
+ struct cls_bpf_prog *prog = container_of(to_rcu_work(work),
+ struct cls_bpf_prog,
+ rwork);
+ rtnl_lock();
+ __cls_bpf_delete_prog(prog);
+ rtnl_unlock();
+}
+
+static void __cls_bpf_delete(struct tcf_proto *tp, struct cls_bpf_prog *prog,
+ struct netlink_ext_ack *extack)
+{
+ struct cls_bpf_head *head = rtnl_dereference(tp->root);
+
+ idr_remove(&head->handle_idr, prog->handle);
+ cls_bpf_stop_offload(tp, prog, extack);
+ list_del_rcu(&prog->link);
+ tcf_unbind_filter(tp, &prog->res);
+ if (tcf_exts_get_net(&prog->exts))
+ tcf_queue_work(&prog->rwork, cls_bpf_delete_prog_work);
+ else
+ __cls_bpf_delete_prog(prog);
+}
+
+static int cls_bpf_delete(struct tcf_proto *tp, void *arg, bool *last,
+ struct netlink_ext_ack *extack)
+{
+ struct cls_bpf_head *head = rtnl_dereference(tp->root);
+
+ __cls_bpf_delete(tp, arg, extack);
+ *last = list_empty(&head->plist);
+ return 0;
+}
+
+static void cls_bpf_destroy(struct tcf_proto *tp,
+ struct netlink_ext_ack *extack)
+{
+ struct cls_bpf_head *head = rtnl_dereference(tp->root);
+ struct cls_bpf_prog *prog, *tmp;
+
+ list_for_each_entry_safe(prog, tmp, &head->plist, link)
+ __cls_bpf_delete(tp, prog, extack);
+
+ idr_destroy(&head->handle_idr);
+ kfree_rcu(head, rcu);
+}
+
+static void *cls_bpf_get(struct tcf_proto *tp, u32 handle)
+{
+ struct cls_bpf_head *head = rtnl_dereference(tp->root);
+ struct cls_bpf_prog *prog;
+
+ list_for_each_entry(prog, &head->plist, link) {
+ if (prog->handle == handle)
+ return prog;
+ }
+
+ return NULL;
+}
+
+static int cls_bpf_prog_from_ops(struct nlattr **tb, struct cls_bpf_prog *prog)
+{
+ struct sock_filter *bpf_ops;
+ struct sock_fprog_kern fprog_tmp;
+ struct bpf_prog *fp;
+ u16 bpf_size, bpf_num_ops;
+ int ret;
+
+ bpf_num_ops = nla_get_u16(tb[TCA_BPF_OPS_LEN]);
+ if (bpf_num_ops > BPF_MAXINSNS || bpf_num_ops == 0)
+ return -EINVAL;
+
+ bpf_size = bpf_num_ops * sizeof(*bpf_ops);
+ if (bpf_size != nla_len(tb[TCA_BPF_OPS]))
+ return -EINVAL;
+
+ bpf_ops = kmemdup(nla_data(tb[TCA_BPF_OPS]), bpf_size, GFP_KERNEL);
+ if (bpf_ops == NULL)
+ return -ENOMEM;
+
+ fprog_tmp.len = bpf_num_ops;
+ fprog_tmp.filter = bpf_ops;
+
+ ret = bpf_prog_create(&fp, &fprog_tmp);
+ if (ret < 0) {
+ kfree(bpf_ops);
+ return ret;
+ }
+
+ prog->bpf_ops = bpf_ops;
+ prog->bpf_num_ops = bpf_num_ops;
+ prog->bpf_name = NULL;
+ prog->filter = fp;
+
+ return 0;
+}
+
+static int cls_bpf_prog_from_efd(struct nlattr **tb, struct cls_bpf_prog *prog,
+ u32 gen_flags, const struct tcf_proto *tp)
+{
+ struct bpf_prog *fp;
+ char *name = NULL;
+ bool skip_sw;
+ u32 bpf_fd;
+
+ bpf_fd = nla_get_u32(tb[TCA_BPF_FD]);
+ skip_sw = gen_flags & TCA_CLS_FLAGS_SKIP_SW;
+
+ fp = bpf_prog_get_type_dev(bpf_fd, BPF_PROG_TYPE_SCHED_CLS, skip_sw);
+ if (IS_ERR(fp))
+ return PTR_ERR(fp);
+
+ if (tb[TCA_BPF_NAME]) {
+ name = nla_memdup(tb[TCA_BPF_NAME], GFP_KERNEL);
+ if (!name) {
+ bpf_prog_put(fp);
+ return -ENOMEM;
+ }
+ }
+
+ prog->bpf_ops = NULL;
+ prog->bpf_name = name;
+ prog->filter = fp;
+
+ if (fp->dst_needed)
+ tcf_block_netif_keep_dst(tp->chain->block);
+
+ return 0;
+}
+
+static int cls_bpf_set_parms(struct net *net, struct tcf_proto *tp,
+ struct cls_bpf_prog *prog, unsigned long base,
+ struct nlattr **tb, struct nlattr *est, bool ovr,
+ struct netlink_ext_ack *extack)
+{
+ bool is_bpf, is_ebpf, have_exts = false;
+ u32 gen_flags = 0;
+ int ret;
+
+ is_bpf = tb[TCA_BPF_OPS_LEN] && tb[TCA_BPF_OPS];
+ is_ebpf = tb[TCA_BPF_FD];
+ if ((!is_bpf && !is_ebpf) || (is_bpf && is_ebpf))
+ return -EINVAL;
+
+ ret = tcf_exts_validate(net, tp, tb, est, &prog->exts, ovr, extack);
+ if (ret < 0)
+ return ret;
+
+ if (tb[TCA_BPF_FLAGS]) {
+ u32 bpf_flags = nla_get_u32(tb[TCA_BPF_FLAGS]);
+
+ if (bpf_flags & ~TCA_BPF_FLAG_ACT_DIRECT)
+ return -EINVAL;
+
+ have_exts = bpf_flags & TCA_BPF_FLAG_ACT_DIRECT;
+ }
+ if (tb[TCA_BPF_FLAGS_GEN]) {
+ gen_flags = nla_get_u32(tb[TCA_BPF_FLAGS_GEN]);
+ if (gen_flags & ~CLS_BPF_SUPPORTED_GEN_FLAGS ||
+ !tc_flags_valid(gen_flags))
+ return -EINVAL;
+ }
+
+ prog->exts_integrated = have_exts;
+ prog->gen_flags = gen_flags;
+
+ ret = is_bpf ? cls_bpf_prog_from_ops(tb, prog) :
+ cls_bpf_prog_from_efd(tb, prog, gen_flags, tp);
+ if (ret < 0)
+ return ret;
+
+ if (tb[TCA_BPF_CLASSID]) {
+ prog->res.classid = nla_get_u32(tb[TCA_BPF_CLASSID]);
+ tcf_bind_filter(tp, &prog->res, base);
+ }
+
+ return 0;
+}
+
+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,
+ void **arg, bool ovr, struct netlink_ext_ack *extack)
+{
+ struct cls_bpf_head *head = rtnl_dereference(tp->root);
+ struct cls_bpf_prog *oldprog = *arg;
+ struct nlattr *tb[TCA_BPF_MAX + 1];
+ struct cls_bpf_prog *prog;
+ int ret;
+
+ if (tca[TCA_OPTIONS] == NULL)
+ return -EINVAL;
+
+ ret = nla_parse_nested(tb, TCA_BPF_MAX, tca[TCA_OPTIONS], bpf_policy,
+ NULL);
+ if (ret < 0)
+ return ret;
+
+ prog = kzalloc(sizeof(*prog), GFP_KERNEL);
+ if (!prog)
+ return -ENOBUFS;
+
+ ret = tcf_exts_init(&prog->exts, TCA_BPF_ACT, TCA_BPF_POLICE);
+ if (ret < 0)
+ goto errout;
+
+ if (oldprog) {
+ if (handle && oldprog->handle != handle) {
+ ret = -EINVAL;
+ goto errout;
+ }
+ }
+
+ if (handle == 0) {
+ 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);
+ }
+
+ if (ret)
+ goto errout;
+ prog->handle = handle;
+
+ ret = cls_bpf_set_parms(net, tp, prog, base, tb, tca[TCA_RATE], ovr,
+ extack);
+ if (ret < 0)
+ goto errout_idr;
+
+ ret = cls_bpf_offload(tp, prog, oldprog, extack);
+ if (ret)
+ goto errout_parms;
+
+ if (!tc_in_hw(prog->gen_flags))
+ prog->gen_flags |= TCA_CLS_FLAGS_NOT_IN_HW;
+
+ if (oldprog) {
+ idr_replace(&head->handle_idr, prog, handle);
+ list_replace_rcu(&oldprog->link, &prog->link);
+ tcf_unbind_filter(tp, &oldprog->res);
+ tcf_exts_get_net(&oldprog->exts);
+ tcf_queue_work(&oldprog->rwork, cls_bpf_delete_prog_work);
+ } else {
+ list_add_rcu(&prog->link, &head->plist);
+ }
+
+ *arg = prog;
+ return 0;
+
+errout_parms:
+ cls_bpf_free_parms(prog);
+errout_idr:
+ if (!oldprog)
+ idr_remove(&head->handle_idr, prog->handle);
+errout:
+ tcf_exts_destroy(&prog->exts);
+ kfree(prog);
+ return ret;
+}
+
+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)
+{
+ struct nlattr *nla;
+
+ if (prog->bpf_name &&
+ nla_put_string(skb, TCA_BPF_NAME, prog->bpf_name))
+ return -EMSGSIZE;
+
+ if (nla_put_u32(skb, TCA_BPF_ID, prog->filter->aux->id))
+ return -EMSGSIZE;
+
+ nla = nla_reserve(skb, TCA_BPF_TAG, sizeof(prog->filter->tag));
+ if (nla == NULL)
+ return -EMSGSIZE;
+
+ memcpy(nla_data(nla), prog->filter->tag, nla_len(nla));
+
+ return 0;
+}
+
+static int cls_bpf_dump(struct net *net, struct tcf_proto *tp, void *fh,
+ struct sk_buff *skb, struct tcmsg *tm)
+{
+ struct cls_bpf_prog *prog = fh;
+ struct nlattr *nest;
+ u32 bpf_flags = 0;
+ int ret;
+
+ if (prog == NULL)
+ return skb->len;
+
+ tm->tcm_handle = prog->handle;
+
+ cls_bpf_offload_update_stats(tp, prog);
+
+ nest = nla_nest_start(skb, TCA_OPTIONS);
+ if (nest == NULL)
+ goto nla_put_failure;
+
+ if (prog->res.classid &&
+ nla_put_u32(skb, TCA_BPF_CLASSID, prog->res.classid))
+ goto nla_put_failure;
+
+ 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)
+ goto nla_put_failure;
+
+ if (tcf_exts_dump(skb, &prog->exts) < 0)
+ goto nla_put_failure;
+
+ 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;
+ if (prog->gen_flags &&
+ nla_put_u32(skb, TCA_BPF_FLAGS_GEN, prog->gen_flags))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, nest);
+
+ if (tcf_exts_dump_stats(skb, &prog->exts) < 0)
+ goto nla_put_failure;
+
+ return skb->len;
+
+nla_put_failure:
+ nla_nest_cancel(skb, nest);
+ return -1;
+}
+
+static void cls_bpf_bind_class(void *fh, u32 classid, unsigned long cl)
+{
+ struct cls_bpf_prog *prog = fh;
+
+ if (prog && prog->res.classid == classid)
+ prog->res.class = cl;
+}
+
+static void cls_bpf_walk(struct tcf_proto *tp, struct tcf_walker *arg)
+{
+ struct cls_bpf_head *head = rtnl_dereference(tp->root);
+ struct cls_bpf_prog *prog;
+
+ list_for_each_entry(prog, &head->plist, link) {
+ if (arg->count < arg->skip)
+ goto skip;
+ if (arg->fn(tp, prog, arg) < 0) {
+ arg->stop = 1;
+ break;
+ }
+skip:
+ arg->count++;
+ }
+}
+
+static int cls_bpf_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
+ 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,
+ extack);
+ 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;
+
+ err = cb(TC_SETUP_CLSBPF, &cls_bpf, cb_priv);
+ if (err) {
+ if (add && tc_skip_sw(prog->gen_flags))
+ return err;
+ continue;
+ }
+
+ tc_cls_offload_cnt_update(block, &prog->in_hw_count,
+ &prog->gen_flags, add);
+ }
+
+ return 0;
+}
+
+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,
+ .change = cls_bpf_change,
+ .delete = cls_bpf_delete,
+ .walk = cls_bpf_walk,
+ .reoffload = cls_bpf_reoffload,
+ .dump = cls_bpf_dump,
+ .bind_class = cls_bpf_bind_class,
+};
+
+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);