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725 lines
16 KiB
725 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* net/sched/cls_flow.c Generic flow classifier |
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* |
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* Copyright (c) 2007, 2008 Patrick McHardy <[email protected]> |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/list.h> |
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#include <linux/jhash.h> |
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#include <linux/random.h> |
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#include <linux/pkt_cls.h> |
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#include <linux/skbuff.h> |
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#include <linux/in.h> |
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#include <linux/ip.h> |
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#include <linux/ipv6.h> |
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#include <linux/if_vlan.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <net/inet_sock.h> |
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#include <net/pkt_cls.h> |
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#include <net/ip.h> |
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#include <net/route.h> |
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#include <net/flow_dissector.h> |
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#if IS_ENABLED(CONFIG_NF_CONNTRACK) |
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#include <net/netfilter/nf_conntrack.h> |
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#endif |
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struct flow_head { |
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struct list_head filters; |
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struct rcu_head rcu; |
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}; |
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struct flow_filter { |
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struct list_head list; |
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struct tcf_exts exts; |
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struct tcf_ematch_tree ematches; |
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struct tcf_proto *tp; |
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struct timer_list perturb_timer; |
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u32 perturb_period; |
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u32 handle; |
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u32 nkeys; |
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u32 keymask; |
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u32 mode; |
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u32 mask; |
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u32 xor; |
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u32 rshift; |
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u32 addend; |
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u32 divisor; |
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u32 baseclass; |
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u32 hashrnd; |
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struct rcu_work rwork; |
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}; |
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static inline u32 addr_fold(void *addr) |
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{ |
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unsigned long a = (unsigned long)addr; |
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return (a & 0xFFFFFFFF) ^ (BITS_PER_LONG > 32 ? a >> 32 : 0); |
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} |
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static u32 flow_get_src(const struct sk_buff *skb, const struct flow_keys *flow) |
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{ |
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__be32 src = flow_get_u32_src(flow); |
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if (src) |
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return ntohl(src); |
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return addr_fold(skb->sk); |
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} |
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static u32 flow_get_dst(const struct sk_buff *skb, const struct flow_keys *flow) |
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{ |
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__be32 dst = flow_get_u32_dst(flow); |
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if (dst) |
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return ntohl(dst); |
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return addr_fold(skb_dst(skb)) ^ (__force u16)skb_protocol(skb, true); |
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} |
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static u32 flow_get_proto(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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return flow->basic.ip_proto; |
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} |
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static u32 flow_get_proto_src(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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if (flow->ports.ports) |
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return ntohs(flow->ports.src); |
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return addr_fold(skb->sk); |
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} |
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static u32 flow_get_proto_dst(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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if (flow->ports.ports) |
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return ntohs(flow->ports.dst); |
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return addr_fold(skb_dst(skb)) ^ (__force u16)skb_protocol(skb, true); |
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} |
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static u32 flow_get_iif(const struct sk_buff *skb) |
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{ |
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return skb->skb_iif; |
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} |
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static u32 flow_get_priority(const struct sk_buff *skb) |
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{ |
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return skb->priority; |
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} |
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static u32 flow_get_mark(const struct sk_buff *skb) |
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{ |
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return skb->mark; |
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} |
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static u32 flow_get_nfct(const struct sk_buff *skb) |
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{ |
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#if IS_ENABLED(CONFIG_NF_CONNTRACK) |
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return addr_fold(skb_nfct(skb)); |
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#else |
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return 0; |
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#endif |
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} |
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#if IS_ENABLED(CONFIG_NF_CONNTRACK) |
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#define CTTUPLE(skb, member) \ |
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({ \ |
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enum ip_conntrack_info ctinfo; \ |
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const struct nf_conn *ct = nf_ct_get(skb, &ctinfo); \ |
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if (ct == NULL) \ |
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goto fallback; \ |
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ct->tuplehash[CTINFO2DIR(ctinfo)].tuple.member; \ |
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}) |
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#else |
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#define CTTUPLE(skb, member) \ |
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({ \ |
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goto fallback; \ |
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0; \ |
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}) |
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#endif |
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static u32 flow_get_nfct_src(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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switch (skb_protocol(skb, true)) { |
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case htons(ETH_P_IP): |
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return ntohl(CTTUPLE(skb, src.u3.ip)); |
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case htons(ETH_P_IPV6): |
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return ntohl(CTTUPLE(skb, src.u3.ip6[3])); |
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} |
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fallback: |
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return flow_get_src(skb, flow); |
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} |
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static u32 flow_get_nfct_dst(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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switch (skb_protocol(skb, true)) { |
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case htons(ETH_P_IP): |
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return ntohl(CTTUPLE(skb, dst.u3.ip)); |
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case htons(ETH_P_IPV6): |
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return ntohl(CTTUPLE(skb, dst.u3.ip6[3])); |
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} |
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fallback: |
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return flow_get_dst(skb, flow); |
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} |
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static u32 flow_get_nfct_proto_src(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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return ntohs(CTTUPLE(skb, src.u.all)); |
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fallback: |
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return flow_get_proto_src(skb, flow); |
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} |
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static u32 flow_get_nfct_proto_dst(const struct sk_buff *skb, |
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const struct flow_keys *flow) |
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{ |
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return ntohs(CTTUPLE(skb, dst.u.all)); |
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fallback: |
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return flow_get_proto_dst(skb, flow); |
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} |
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static u32 flow_get_rtclassid(const struct sk_buff *skb) |
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{ |
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#ifdef CONFIG_IP_ROUTE_CLASSID |
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if (skb_dst(skb)) |
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return skb_dst(skb)->tclassid; |
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#endif |
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return 0; |
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} |
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static u32 flow_get_skuid(const struct sk_buff *skb) |
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{ |
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struct sock *sk = skb_to_full_sk(skb); |
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if (sk && sk->sk_socket && sk->sk_socket->file) { |
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kuid_t skuid = sk->sk_socket->file->f_cred->fsuid; |
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return from_kuid(&init_user_ns, skuid); |
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} |
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return 0; |
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} |
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static u32 flow_get_skgid(const struct sk_buff *skb) |
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{ |
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struct sock *sk = skb_to_full_sk(skb); |
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if (sk && sk->sk_socket && sk->sk_socket->file) { |
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kgid_t skgid = sk->sk_socket->file->f_cred->fsgid; |
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return from_kgid(&init_user_ns, skgid); |
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} |
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return 0; |
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} |
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static u32 flow_get_vlan_tag(const struct sk_buff *skb) |
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{ |
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u16 tag; |
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if (vlan_get_tag(skb, &tag) < 0) |
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return 0; |
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return tag & VLAN_VID_MASK; |
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} |
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static u32 flow_get_rxhash(struct sk_buff *skb) |
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{ |
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return skb_get_hash(skb); |
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} |
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static u32 flow_key_get(struct sk_buff *skb, int key, struct flow_keys *flow) |
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{ |
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switch (key) { |
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case FLOW_KEY_SRC: |
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return flow_get_src(skb, flow); |
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case FLOW_KEY_DST: |
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return flow_get_dst(skb, flow); |
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case FLOW_KEY_PROTO: |
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return flow_get_proto(skb, flow); |
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case FLOW_KEY_PROTO_SRC: |
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return flow_get_proto_src(skb, flow); |
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case FLOW_KEY_PROTO_DST: |
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return flow_get_proto_dst(skb, flow); |
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case FLOW_KEY_IIF: |
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return flow_get_iif(skb); |
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case FLOW_KEY_PRIORITY: |
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return flow_get_priority(skb); |
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case FLOW_KEY_MARK: |
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return flow_get_mark(skb); |
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case FLOW_KEY_NFCT: |
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return flow_get_nfct(skb); |
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case FLOW_KEY_NFCT_SRC: |
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return flow_get_nfct_src(skb, flow); |
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case FLOW_KEY_NFCT_DST: |
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return flow_get_nfct_dst(skb, flow); |
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case FLOW_KEY_NFCT_PROTO_SRC: |
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return flow_get_nfct_proto_src(skb, flow); |
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case FLOW_KEY_NFCT_PROTO_DST: |
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return flow_get_nfct_proto_dst(skb, flow); |
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case FLOW_KEY_RTCLASSID: |
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return flow_get_rtclassid(skb); |
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case FLOW_KEY_SKUID: |
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return flow_get_skuid(skb); |
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case FLOW_KEY_SKGID: |
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return flow_get_skgid(skb); |
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case FLOW_KEY_VLAN_TAG: |
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return flow_get_vlan_tag(skb); |
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case FLOW_KEY_RXHASH: |
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return flow_get_rxhash(skb); |
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default: |
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WARN_ON(1); |
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return 0; |
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} |
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} |
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#define FLOW_KEYS_NEEDED ((1 << FLOW_KEY_SRC) | \ |
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(1 << FLOW_KEY_DST) | \ |
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(1 << FLOW_KEY_PROTO) | \ |
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(1 << FLOW_KEY_PROTO_SRC) | \ |
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(1 << FLOW_KEY_PROTO_DST) | \ |
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(1 << FLOW_KEY_NFCT_SRC) | \ |
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(1 << FLOW_KEY_NFCT_DST) | \ |
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(1 << FLOW_KEY_NFCT_PROTO_SRC) | \ |
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(1 << FLOW_KEY_NFCT_PROTO_DST)) |
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static int flow_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
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struct tcf_result *res) |
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{ |
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struct flow_head *head = rcu_dereference_bh(tp->root); |
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struct flow_filter *f; |
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u32 keymask; |
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u32 classid; |
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unsigned int n, key; |
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int r; |
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list_for_each_entry_rcu(f, &head->filters, list) { |
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u32 keys[FLOW_KEY_MAX + 1]; |
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struct flow_keys flow_keys; |
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if (!tcf_em_tree_match(skb, &f->ematches, NULL)) |
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continue; |
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keymask = f->keymask; |
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if (keymask & FLOW_KEYS_NEEDED) |
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skb_flow_dissect_flow_keys(skb, &flow_keys, 0); |
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for (n = 0; n < f->nkeys; n++) { |
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key = ffs(keymask) - 1; |
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keymask &= ~(1 << key); |
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keys[n] = flow_key_get(skb, key, &flow_keys); |
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} |
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if (f->mode == FLOW_MODE_HASH) |
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classid = jhash2(keys, f->nkeys, f->hashrnd); |
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else { |
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classid = keys[0]; |
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classid = (classid & f->mask) ^ f->xor; |
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classid = (classid >> f->rshift) + f->addend; |
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} |
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if (f->divisor) |
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classid %= f->divisor; |
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res->class = 0; |
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res->classid = TC_H_MAKE(f->baseclass, f->baseclass + classid); |
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r = tcf_exts_exec(skb, &f->exts, res); |
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if (r < 0) |
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continue; |
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return r; |
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} |
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return -1; |
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} |
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static void flow_perturbation(struct timer_list *t) |
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{ |
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struct flow_filter *f = from_timer(f, t, perturb_timer); |
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get_random_bytes(&f->hashrnd, 4); |
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if (f->perturb_period) |
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mod_timer(&f->perturb_timer, jiffies + f->perturb_period); |
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} |
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static const struct nla_policy flow_policy[TCA_FLOW_MAX + 1] = { |
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[TCA_FLOW_KEYS] = { .type = NLA_U32 }, |
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[TCA_FLOW_MODE] = { .type = NLA_U32 }, |
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[TCA_FLOW_BASECLASS] = { .type = NLA_U32 }, |
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[TCA_FLOW_RSHIFT] = { .type = NLA_U32 }, |
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[TCA_FLOW_ADDEND] = { .type = NLA_U32 }, |
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[TCA_FLOW_MASK] = { .type = NLA_U32 }, |
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[TCA_FLOW_XOR] = { .type = NLA_U32 }, |
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[TCA_FLOW_DIVISOR] = { .type = NLA_U32 }, |
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[TCA_FLOW_ACT] = { .type = NLA_NESTED }, |
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[TCA_FLOW_POLICE] = { .type = NLA_NESTED }, |
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[TCA_FLOW_EMATCHES] = { .type = NLA_NESTED }, |
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[TCA_FLOW_PERTURB] = { .type = NLA_U32 }, |
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}; |
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static void __flow_destroy_filter(struct flow_filter *f) |
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{ |
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del_timer_sync(&f->perturb_timer); |
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tcf_exts_destroy(&f->exts); |
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tcf_em_tree_destroy(&f->ematches); |
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tcf_exts_put_net(&f->exts); |
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kfree(f); |
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} |
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static void flow_destroy_filter_work(struct work_struct *work) |
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{ |
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struct flow_filter *f = container_of(to_rcu_work(work), |
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struct flow_filter, |
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rwork); |
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rtnl_lock(); |
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__flow_destroy_filter(f); |
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rtnl_unlock(); |
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} |
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static int flow_change(struct net *net, struct sk_buff *in_skb, |
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struct tcf_proto *tp, unsigned long base, |
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u32 handle, struct nlattr **tca, |
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void **arg, u32 flags, |
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struct netlink_ext_ack *extack) |
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{ |
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struct flow_head *head = rtnl_dereference(tp->root); |
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struct flow_filter *fold, *fnew; |
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struct nlattr *opt = tca[TCA_OPTIONS]; |
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struct nlattr *tb[TCA_FLOW_MAX + 1]; |
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unsigned int nkeys = 0; |
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unsigned int perturb_period = 0; |
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u32 baseclass = 0; |
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u32 keymask = 0; |
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u32 mode; |
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int err; |
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if (opt == NULL) |
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return -EINVAL; |
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err = nla_parse_nested_deprecated(tb, TCA_FLOW_MAX, opt, flow_policy, |
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NULL); |
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if (err < 0) |
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return err; |
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if (tb[TCA_FLOW_BASECLASS]) { |
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baseclass = nla_get_u32(tb[TCA_FLOW_BASECLASS]); |
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if (TC_H_MIN(baseclass) == 0) |
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return -EINVAL; |
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} |
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if (tb[TCA_FLOW_KEYS]) { |
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keymask = nla_get_u32(tb[TCA_FLOW_KEYS]); |
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nkeys = hweight32(keymask); |
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if (nkeys == 0) |
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return -EINVAL; |
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if (fls(keymask) - 1 > FLOW_KEY_MAX) |
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return -EOPNOTSUPP; |
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if ((keymask & (FLOW_KEY_SKUID|FLOW_KEY_SKGID)) && |
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sk_user_ns(NETLINK_CB(in_skb).sk) != &init_user_ns) |
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return -EOPNOTSUPP; |
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} |
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fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); |
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if (!fnew) |
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return -ENOBUFS; |
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err = tcf_em_tree_validate(tp, tb[TCA_FLOW_EMATCHES], &fnew->ematches); |
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if (err < 0) |
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goto err1; |
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err = tcf_exts_init(&fnew->exts, net, TCA_FLOW_ACT, TCA_FLOW_POLICE); |
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if (err < 0) |
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goto err2; |
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err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &fnew->exts, flags, |
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extack); |
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if (err < 0) |
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goto err2; |
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fold = *arg; |
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if (fold) { |
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err = -EINVAL; |
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if (fold->handle != handle && handle) |
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goto err2; |
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/* Copy fold into fnew */ |
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fnew->tp = fold->tp; |
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fnew->handle = fold->handle; |
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fnew->nkeys = fold->nkeys; |
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fnew->keymask = fold->keymask; |
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fnew->mode = fold->mode; |
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fnew->mask = fold->mask; |
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fnew->xor = fold->xor; |
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fnew->rshift = fold->rshift; |
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fnew->addend = fold->addend; |
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fnew->divisor = fold->divisor; |
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fnew->baseclass = fold->baseclass; |
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fnew->hashrnd = fold->hashrnd; |
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mode = fold->mode; |
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if (tb[TCA_FLOW_MODE]) |
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mode = nla_get_u32(tb[TCA_FLOW_MODE]); |
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if (mode != FLOW_MODE_HASH && nkeys > 1) |
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goto err2; |
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if (mode == FLOW_MODE_HASH) |
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perturb_period = fold->perturb_period; |
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if (tb[TCA_FLOW_PERTURB]) { |
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if (mode != FLOW_MODE_HASH) |
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goto err2; |
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perturb_period = nla_get_u32(tb[TCA_FLOW_PERTURB]) * HZ; |
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} |
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} else { |
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err = -EINVAL; |
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if (!handle) |
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goto err2; |
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if (!tb[TCA_FLOW_KEYS]) |
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goto err2; |
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mode = FLOW_MODE_MAP; |
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if (tb[TCA_FLOW_MODE]) |
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mode = nla_get_u32(tb[TCA_FLOW_MODE]); |
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if (mode != FLOW_MODE_HASH && nkeys > 1) |
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goto err2; |
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if (tb[TCA_FLOW_PERTURB]) { |
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if (mode != FLOW_MODE_HASH) |
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goto err2; |
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perturb_period = nla_get_u32(tb[TCA_FLOW_PERTURB]) * HZ; |
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} |
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if (TC_H_MAJ(baseclass) == 0) { |
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struct Qdisc *q = tcf_block_q(tp->chain->block); |
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baseclass = TC_H_MAKE(q->handle, baseclass); |
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} |
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if (TC_H_MIN(baseclass) == 0) |
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baseclass = TC_H_MAKE(baseclass, 1); |
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fnew->handle = handle; |
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fnew->mask = ~0U; |
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fnew->tp = tp; |
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get_random_bytes(&fnew->hashrnd, 4); |
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} |
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timer_setup(&fnew->perturb_timer, flow_perturbation, TIMER_DEFERRABLE); |
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tcf_block_netif_keep_dst(tp->chain->block); |
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if (tb[TCA_FLOW_KEYS]) { |
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fnew->keymask = keymask; |
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fnew->nkeys = nkeys; |
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} |
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fnew->mode = mode; |
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if (tb[TCA_FLOW_MASK]) |
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fnew->mask = nla_get_u32(tb[TCA_FLOW_MASK]); |
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if (tb[TCA_FLOW_XOR]) |
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fnew->xor = nla_get_u32(tb[TCA_FLOW_XOR]); |
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if (tb[TCA_FLOW_RSHIFT]) |
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fnew->rshift = nla_get_u32(tb[TCA_FLOW_RSHIFT]); |
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if (tb[TCA_FLOW_ADDEND]) |
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fnew->addend = nla_get_u32(tb[TCA_FLOW_ADDEND]); |
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if (tb[TCA_FLOW_DIVISOR]) |
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fnew->divisor = nla_get_u32(tb[TCA_FLOW_DIVISOR]); |
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if (baseclass) |
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fnew->baseclass = baseclass; |
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|
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fnew->perturb_period = perturb_period; |
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if (perturb_period) |
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mod_timer(&fnew->perturb_timer, jiffies + perturb_period); |
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|
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if (!*arg) |
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list_add_tail_rcu(&fnew->list, &head->filters); |
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else |
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list_replace_rcu(&fold->list, &fnew->list); |
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|
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*arg = fnew; |
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|
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if (fold) { |
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tcf_exts_get_net(&fold->exts); |
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tcf_queue_work(&fold->rwork, flow_destroy_filter_work); |
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} |
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return 0; |
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|
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err2: |
|
tcf_exts_destroy(&fnew->exts); |
|
tcf_em_tree_destroy(&fnew->ematches); |
|
err1: |
|
kfree(fnew); |
|
return err; |
|
} |
|
|
|
static int flow_delete(struct tcf_proto *tp, void *arg, bool *last, |
|
bool rtnl_held, struct netlink_ext_ack *extack) |
|
{ |
|
struct flow_head *head = rtnl_dereference(tp->root); |
|
struct flow_filter *f = arg; |
|
|
|
list_del_rcu(&f->list); |
|
tcf_exts_get_net(&f->exts); |
|
tcf_queue_work(&f->rwork, flow_destroy_filter_work); |
|
*last = list_empty(&head->filters); |
|
return 0; |
|
} |
|
|
|
static int flow_init(struct tcf_proto *tp) |
|
{ |
|
struct flow_head *head; |
|
|
|
head = kzalloc(sizeof(*head), GFP_KERNEL); |
|
if (head == NULL) |
|
return -ENOBUFS; |
|
INIT_LIST_HEAD(&head->filters); |
|
rcu_assign_pointer(tp->root, head); |
|
return 0; |
|
} |
|
|
|
static void flow_destroy(struct tcf_proto *tp, bool rtnl_held, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct flow_head *head = rtnl_dereference(tp->root); |
|
struct flow_filter *f, *next; |
|
|
|
list_for_each_entry_safe(f, next, &head->filters, list) { |
|
list_del_rcu(&f->list); |
|
if (tcf_exts_get_net(&f->exts)) |
|
tcf_queue_work(&f->rwork, flow_destroy_filter_work); |
|
else |
|
__flow_destroy_filter(f); |
|
} |
|
kfree_rcu(head, rcu); |
|
} |
|
|
|
static void *flow_get(struct tcf_proto *tp, u32 handle) |
|
{ |
|
struct flow_head *head = rtnl_dereference(tp->root); |
|
struct flow_filter *f; |
|
|
|
list_for_each_entry(f, &head->filters, list) |
|
if (f->handle == handle) |
|
return f; |
|
return NULL; |
|
} |
|
|
|
static int flow_dump(struct net *net, struct tcf_proto *tp, void *fh, |
|
struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) |
|
{ |
|
struct flow_filter *f = fh; |
|
struct nlattr *nest; |
|
|
|
if (f == NULL) |
|
return skb->len; |
|
|
|
t->tcm_handle = f->handle; |
|
|
|
nest = nla_nest_start_noflag(skb, TCA_OPTIONS); |
|
if (nest == NULL) |
|
goto nla_put_failure; |
|
|
|
if (nla_put_u32(skb, TCA_FLOW_KEYS, f->keymask) || |
|
nla_put_u32(skb, TCA_FLOW_MODE, f->mode)) |
|
goto nla_put_failure; |
|
|
|
if (f->mask != ~0 || f->xor != 0) { |
|
if (nla_put_u32(skb, TCA_FLOW_MASK, f->mask) || |
|
nla_put_u32(skb, TCA_FLOW_XOR, f->xor)) |
|
goto nla_put_failure; |
|
} |
|
if (f->rshift && |
|
nla_put_u32(skb, TCA_FLOW_RSHIFT, f->rshift)) |
|
goto nla_put_failure; |
|
if (f->addend && |
|
nla_put_u32(skb, TCA_FLOW_ADDEND, f->addend)) |
|
goto nla_put_failure; |
|
|
|
if (f->divisor && |
|
nla_put_u32(skb, TCA_FLOW_DIVISOR, f->divisor)) |
|
goto nla_put_failure; |
|
if (f->baseclass && |
|
nla_put_u32(skb, TCA_FLOW_BASECLASS, f->baseclass)) |
|
goto nla_put_failure; |
|
|
|
if (f->perturb_period && |
|
nla_put_u32(skb, TCA_FLOW_PERTURB, f->perturb_period / HZ)) |
|
goto nla_put_failure; |
|
|
|
if (tcf_exts_dump(skb, &f->exts) < 0) |
|
goto nla_put_failure; |
|
#ifdef CONFIG_NET_EMATCH |
|
if (f->ematches.hdr.nmatches && |
|
tcf_em_tree_dump(skb, &f->ematches, TCA_FLOW_EMATCHES) < 0) |
|
goto nla_put_failure; |
|
#endif |
|
nla_nest_end(skb, nest); |
|
|
|
if (tcf_exts_dump_stats(skb, &f->exts) < 0) |
|
goto nla_put_failure; |
|
|
|
return skb->len; |
|
|
|
nla_put_failure: |
|
nla_nest_cancel(skb, nest); |
|
return -1; |
|
} |
|
|
|
static void flow_walk(struct tcf_proto *tp, struct tcf_walker *arg, |
|
bool rtnl_held) |
|
{ |
|
struct flow_head *head = rtnl_dereference(tp->root); |
|
struct flow_filter *f; |
|
|
|
list_for_each_entry(f, &head->filters, list) { |
|
if (arg->count < arg->skip) |
|
goto skip; |
|
if (arg->fn(tp, f, arg) < 0) { |
|
arg->stop = 1; |
|
break; |
|
} |
|
skip: |
|
arg->count++; |
|
} |
|
} |
|
|
|
static struct tcf_proto_ops cls_flow_ops __read_mostly = { |
|
.kind = "flow", |
|
.classify = flow_classify, |
|
.init = flow_init, |
|
.destroy = flow_destroy, |
|
.change = flow_change, |
|
.delete = flow_delete, |
|
.get = flow_get, |
|
.dump = flow_dump, |
|
.walk = flow_walk, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
static int __init cls_flow_init(void) |
|
{ |
|
return register_tcf_proto_ops(&cls_flow_ops); |
|
} |
|
|
|
static void __exit cls_flow_exit(void) |
|
{ |
|
unregister_tcf_proto_ops(&cls_flow_ops); |
|
} |
|
|
|
module_init(cls_flow_init); |
|
module_exit(cls_flow_exit); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Patrick McHardy <[email protected]>"); |
|
MODULE_DESCRIPTION("TC flow classifier");
|
|
|