Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
| 11 | * Changes: |
| 12 | * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one |
| 13 | * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel). |
| 14 | * Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension |
| 15 | * |
| 16 | * JHS: We should remove the CONFIG_NET_CLS_IND from here |
| 17 | * eventually when the meta match extension is made available |
| 18 | * |
| 19 | */ |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/types.h> |
| 24 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/skbuff.h> |
Patrick McHardy | 0ba4805 | 2007-07-02 22:49:07 -0700 | [diff] [blame] | 28 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <net/act_api.h> |
| 30 | #include <net/pkt_cls.h> |
| 31 | |
Eric Dumazet | d37d8ac | 2014-03-17 20:20:49 -0700 | [diff] [blame] | 32 | #define HTSIZE 256 |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 33 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 34 | struct fw_head { |
Eric Dumazet | d37d8ac | 2014-03-17 20:20:49 -0700 | [diff] [blame] | 35 | u32 mask; |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 36 | struct fw_filter __rcu *ht[HTSIZE]; |
| 37 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | }; |
| 39 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 40 | struct fw_filter { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 41 | struct fw_filter __rcu *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | u32 id; |
| 43 | struct tcf_result res; |
| 44 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 45 | int ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #endif /* CONFIG_NET_CLS_IND */ |
| 47 | struct tcf_exts exts; |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 48 | struct tcf_proto *tp; |
| 49 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | }; |
| 51 | |
Eric Dumazet | d37d8ac | 2014-03-17 20:20:49 -0700 | [diff] [blame] | 52 | static u32 fw_hash(u32 handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | { |
Eric Dumazet | d37d8ac | 2014-03-17 20:20:49 -0700 | [diff] [blame] | 54 | handle ^= (handle >> 16); |
| 55 | handle ^= (handle >> 8); |
| 56 | return handle % HTSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | } |
| 58 | |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 59 | static int fw_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | struct tcf_result *res) |
| 61 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 62 | struct fw_head *head = rcu_dereference_bh(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | struct fw_filter *f; |
| 64 | int r; |
Patrick McHardy | 5c804bf | 2006-12-05 13:46:13 -0800 | [diff] [blame] | 65 | u32 id = skb->mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | if (head != NULL) { |
Patrick McHardy | 5c804bf | 2006-12-05 13:46:13 -0800 | [diff] [blame] | 68 | id &= head->mask; |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 69 | |
| 70 | for (f = rcu_dereference_bh(head->ht[fw_hash(id)]); f; |
| 71 | f = rcu_dereference_bh(f->next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | if (f->id == id) { |
| 73 | *res = f->res; |
| 74 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 75 | if (!tcf_match_indev(skb, f->ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | continue; |
| 77 | #endif /* CONFIG_NET_CLS_IND */ |
| 78 | r = tcf_exts_exec(skb, &f->exts, res); |
| 79 | if (r < 0) |
| 80 | continue; |
| 81 | |
| 82 | return r; |
| 83 | } |
| 84 | } |
| 85 | } else { |
WANG Cong | d8aecb1 | 2015-09-22 17:01:11 -0700 | [diff] [blame^] | 86 | /* Old method: classify the packet using its skb mark. */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 87 | if (id && (TC_H_MAJ(id) == 0 || |
| 88 | !(TC_H_MAJ(id ^ tp->q->handle)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | res->classid = id; |
| 90 | res->class = 0; |
| 91 | return 0; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | return -1; |
| 96 | } |
| 97 | |
| 98 | static unsigned long fw_get(struct tcf_proto *tp, u32 handle) |
| 99 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 100 | struct fw_head *head = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | struct fw_filter *f; |
| 102 | |
| 103 | if (head == NULL) |
| 104 | return 0; |
| 105 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 106 | f = rtnl_dereference(head->ht[fw_hash(handle)]); |
| 107 | for (; f; f = rtnl_dereference(f->next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | if (f->id == handle) |
| 109 | return (unsigned long)f; |
| 110 | } |
| 111 | return 0; |
| 112 | } |
| 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | static int fw_init(struct tcf_proto *tp) |
| 115 | { |
WANG Cong | d8aecb1 | 2015-09-22 17:01:11 -0700 | [diff] [blame^] | 116 | /* We don't allocate fw_head here, because in the old method |
| 117 | * we don't need it at all. |
| 118 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | return 0; |
| 120 | } |
| 121 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 122 | static void fw_delete_filter(struct rcu_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 124 | struct fw_filter *f = container_of(head, struct fw_filter, rcu); |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 125 | |
WANG Cong | 18d0264 | 2014-09-25 10:26:37 -0700 | [diff] [blame] | 126 | tcf_exts_destroy(&f->exts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | kfree(f); |
| 128 | } |
| 129 | |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 130 | static bool fw_destroy(struct tcf_proto *tp, bool force) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 132 | struct fw_head *head = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | struct fw_filter *f; |
| 134 | int h; |
| 135 | |
| 136 | if (head == NULL) |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 137 | return true; |
| 138 | |
| 139 | if (!force) { |
| 140 | for (h = 0; h < HTSIZE; h++) |
| 141 | if (rcu_access_pointer(head->ht[h])) |
| 142 | return false; |
| 143 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 145 | for (h = 0; h < HTSIZE; h++) { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 146 | while ((f = rtnl_dereference(head->ht[h])) != NULL) { |
| 147 | RCU_INIT_POINTER(head->ht[h], |
| 148 | rtnl_dereference(f->next)); |
John Fastabend | 18cdb37 | 2014-10-05 21:28:52 -0700 | [diff] [blame] | 149 | tcf_unbind_filter(tp, &f->res); |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 150 | call_rcu(&f->rcu, fw_delete_filter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | } |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 153 | RCU_INIT_POINTER(tp->root, NULL); |
| 154 | kfree_rcu(head, rcu); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 155 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | static int fw_delete(struct tcf_proto *tp, unsigned long arg) |
| 159 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 160 | struct fw_head *head = rtnl_dereference(tp->root); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 161 | struct fw_filter *f = (struct fw_filter *)arg; |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 162 | struct fw_filter __rcu **fp; |
| 163 | struct fw_filter *pfp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | if (head == NULL || f == NULL) |
| 166 | goto out; |
| 167 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 168 | fp = &head->ht[fw_hash(f->id)]; |
| 169 | |
| 170 | for (pfp = rtnl_dereference(*fp); pfp; |
| 171 | fp = &pfp->next, pfp = rtnl_dereference(*fp)) { |
| 172 | if (pfp == f) { |
| 173 | RCU_INIT_POINTER(*fp, rtnl_dereference(f->next)); |
John Fastabend | 18cdb37 | 2014-10-05 21:28:52 -0700 | [diff] [blame] | 174 | tcf_unbind_filter(tp, &f->res); |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 175 | call_rcu(&f->rcu, fw_delete_filter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return 0; |
| 177 | } |
| 178 | } |
| 179 | out: |
| 180 | return -EINVAL; |
| 181 | } |
| 182 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 183 | static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = { |
| 184 | [TCA_FW_CLASSID] = { .type = NLA_U32 }, |
| 185 | [TCA_FW_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, |
| 186 | [TCA_FW_MASK] = { .type = NLA_U32 }, |
| 187 | }; |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | static int |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 190 | fw_change_attrs(struct net *net, struct tcf_proto *tp, struct fw_filter *f, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 191 | struct nlattr **tb, struct nlattr **tca, unsigned long base, bool ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 193 | struct fw_head *head = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | struct tcf_exts e; |
Patrick McHardy | b4e9b52 | 2006-08-25 16:11:42 -0700 | [diff] [blame] | 195 | u32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | int err; |
| 197 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 198 | tcf_exts_init(&e, TCA_FW_ACT, TCA_FW_POLICE); |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 199 | err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (err < 0) |
| 201 | return err; |
| 202 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 203 | if (tb[TCA_FW_CLASSID]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 204 | f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | tcf_bind_filter(tp, &f->res, base); |
| 206 | } |
| 207 | |
| 208 | #ifdef CONFIG_NET_CLS_IND |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 209 | if (tb[TCA_FW_INDEV]) { |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 210 | int ret; |
| 211 | ret = tcf_change_indev(net, tb[TCA_FW_INDEV]); |
Wei Yongjun | 722e47d | 2014-01-17 09:53:20 +0800 | [diff] [blame] | 212 | if (ret < 0) { |
| 213 | err = ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | goto errout; |
Wei Yongjun | 722e47d | 2014-01-17 09:53:20 +0800 | [diff] [blame] | 215 | } |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 216 | f->ifindex = ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | #endif /* CONFIG_NET_CLS_IND */ |
| 219 | |
Wei Yongjun | cb95ec6 | 2013-04-17 16:49:10 +0000 | [diff] [blame] | 220 | err = -EINVAL; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 221 | if (tb[TCA_FW_MASK]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 222 | mask = nla_get_u32(tb[TCA_FW_MASK]); |
Patrick McHardy | b4e9b52 | 2006-08-25 16:11:42 -0700 | [diff] [blame] | 223 | if (mask != head->mask) |
| 224 | goto errout; |
| 225 | } else if (head->mask != 0xFFFFFFFF) |
| 226 | goto errout; |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | tcf_exts_change(tp, &f->exts, &e); |
| 229 | |
| 230 | return 0; |
| 231 | errout: |
WANG Cong | 18d0264 | 2014-09-25 10:26:37 -0700 | [diff] [blame] | 232 | tcf_exts_destroy(&e); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | return err; |
| 234 | } |
| 235 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 236 | static int fw_change(struct net *net, struct sk_buff *in_skb, |
Eric W. Biederman | af4c664 | 2012-05-25 13:42:45 -0600 | [diff] [blame] | 237 | struct tcf_proto *tp, unsigned long base, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | u32 handle, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 239 | struct nlattr **tca, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 240 | unsigned long *arg, bool ovr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 242 | struct fw_head *head = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | struct fw_filter *f = (struct fw_filter *) *arg; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 244 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 245 | struct nlattr *tb[TCA_FW_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | int err; |
| 247 | |
| 248 | if (!opt) |
WANG Cong | d8aecb1 | 2015-09-22 17:01:11 -0700 | [diff] [blame^] | 249 | return handle ? -EINVAL : 0; /* Succeed if it is old method. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 251 | err = nla_parse_nested(tb, TCA_FW_MAX, opt, fw_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 252 | if (err < 0) |
| 253 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 255 | if (f) { |
| 256 | struct fw_filter *pfp, *fnew; |
| 257 | struct fw_filter __rcu **fp; |
| 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (f->id != handle && handle) |
| 260 | return -EINVAL; |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 261 | |
| 262 | fnew = kzalloc(sizeof(struct fw_filter), GFP_KERNEL); |
| 263 | if (!fnew) |
| 264 | return -ENOBUFS; |
| 265 | |
| 266 | fnew->id = f->id; |
| 267 | fnew->res = f->res; |
| 268 | #ifdef CONFIG_NET_CLS_IND |
| 269 | fnew->ifindex = f->ifindex; |
| 270 | #endif /* CONFIG_NET_CLS_IND */ |
| 271 | fnew->tp = f->tp; |
| 272 | |
John Fastabend | e1f93eb | 2014-09-15 23:31:42 -0700 | [diff] [blame] | 273 | tcf_exts_init(&fnew->exts, TCA_FW_ACT, TCA_FW_POLICE); |
| 274 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 275 | err = fw_change_attrs(net, tp, fnew, tb, tca, base, ovr); |
| 276 | if (err < 0) { |
| 277 | kfree(fnew); |
| 278 | return err; |
| 279 | } |
| 280 | |
| 281 | fp = &head->ht[fw_hash(fnew->id)]; |
| 282 | for (pfp = rtnl_dereference(*fp); pfp; |
| 283 | fp = &pfp->next, pfp = rtnl_dereference(*fp)) |
| 284 | if (pfp == f) |
| 285 | break; |
| 286 | |
| 287 | RCU_INIT_POINTER(fnew->next, rtnl_dereference(pfp->next)); |
| 288 | rcu_assign_pointer(*fp, fnew); |
John Fastabend | 18cdb37 | 2014-10-05 21:28:52 -0700 | [diff] [blame] | 289 | tcf_unbind_filter(tp, &f->res); |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 290 | call_rcu(&f->rcu, fw_delete_filter); |
| 291 | |
| 292 | *arg = (unsigned long)fnew; |
| 293 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | if (!handle) |
| 297 | return -EINVAL; |
| 298 | |
WANG Cong | d8aecb1 | 2015-09-22 17:01:11 -0700 | [diff] [blame^] | 299 | if (!head) { |
| 300 | u32 mask = 0xFFFFFFFF; |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 301 | if (tb[TCA_FW_MASK]) |
WANG Cong | d8aecb1 | 2015-09-22 17:01:11 -0700 | [diff] [blame^] | 302 | mask = nla_get_u32(tb[TCA_FW_MASK]); |
| 303 | |
| 304 | head = kzalloc(sizeof(*head), GFP_KERNEL); |
| 305 | if (!head) |
| 306 | return -ENOBUFS; |
| 307 | head->mask = mask; |
| 308 | |
| 309 | rcu_assign_pointer(tp->root, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 312 | f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | if (f == NULL) |
| 314 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 316 | tcf_exts_init(&f->exts, TCA_FW_ACT, TCA_FW_POLICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | f->id = handle; |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 318 | f->tp = tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 320 | err = fw_change_attrs(net, tp, f, tb, tca, base, ovr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | if (err < 0) |
| 322 | goto errout; |
| 323 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 324 | RCU_INIT_POINTER(f->next, head->ht[fw_hash(handle)]); |
| 325 | rcu_assign_pointer(head->ht[fw_hash(handle)], f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | *arg = (unsigned long)f; |
| 328 | return 0; |
| 329 | |
| 330 | errout: |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 331 | kfree(f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | return err; |
| 333 | } |
| 334 | |
| 335 | static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 336 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 337 | struct fw_head *head = rtnl_dereference(tp->root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | int h; |
| 339 | |
| 340 | if (head == NULL) |
| 341 | arg->stop = 1; |
| 342 | |
| 343 | if (arg->stop) |
| 344 | return; |
| 345 | |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 346 | for (h = 0; h < HTSIZE; h++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | struct fw_filter *f; |
| 348 | |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 349 | for (f = rtnl_dereference(head->ht[h]); f; |
| 350 | f = rtnl_dereference(f->next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | if (arg->count < arg->skip) { |
| 352 | arg->count++; |
| 353 | continue; |
| 354 | } |
| 355 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { |
| 356 | arg->stop = 1; |
| 357 | return; |
| 358 | } |
| 359 | arg->count++; |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 364 | static int fw_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | struct sk_buff *skb, struct tcmsg *t) |
| 366 | { |
John Fastabend | e35a8ee | 2014-09-12 20:07:22 -0700 | [diff] [blame] | 367 | struct fw_head *head = rtnl_dereference(tp->root); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 368 | struct fw_filter *f = (struct fw_filter *)fh; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 369 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
| 371 | if (f == NULL) |
| 372 | return skb->len; |
| 373 | |
| 374 | t->tcm_handle = f->id; |
| 375 | |
| 376 | if (!f->res.classid && !tcf_exts_is_available(&f->exts)) |
| 377 | return skb->len; |
| 378 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 379 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 380 | if (nest == NULL) |
| 381 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 383 | if (f->res.classid && |
| 384 | nla_put_u32(skb, TCA_FW_CLASSID, f->res.classid)) |
| 385 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 387 | if (f->ifindex) { |
| 388 | struct net_device *dev; |
| 389 | dev = __dev_get_by_index(net, f->ifindex); |
| 390 | if (dev && nla_put_string(skb, TCA_FW_INDEV, dev->name)) |
| 391 | goto nla_put_failure; |
| 392 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | #endif /* CONFIG_NET_CLS_IND */ |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 394 | if (head->mask != 0xFFFFFFFF && |
| 395 | nla_put_u32(skb, TCA_FW_MASK, head->mask)) |
| 396 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 398 | if (tcf_exts_dump(skb, &f->exts) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 399 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 401 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 403 | if (tcf_exts_dump_stats(skb, &f->exts) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 404 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | return skb->len; |
| 407 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 408 | nla_put_failure: |
Jiri Pirko | 6ea3b44 | 2014-12-09 22:23:29 +0100 | [diff] [blame] | 409 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | return -1; |
| 411 | } |
| 412 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 413 | static struct tcf_proto_ops cls_fw_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | .kind = "fw", |
| 415 | .classify = fw_classify, |
| 416 | .init = fw_init, |
| 417 | .destroy = fw_destroy, |
| 418 | .get = fw_get, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | .change = fw_change, |
| 420 | .delete = fw_delete, |
| 421 | .walk = fw_walk, |
| 422 | .dump = fw_dump, |
| 423 | .owner = THIS_MODULE, |
| 424 | }; |
| 425 | |
| 426 | static int __init init_fw(void) |
| 427 | { |
| 428 | return register_tcf_proto_ops(&cls_fw_ops); |
| 429 | } |
| 430 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 431 | static void __exit exit_fw(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | { |
| 433 | unregister_tcf_proto_ops(&cls_fw_ops); |
| 434 | } |
| 435 | |
| 436 | module_init(init_fw) |
| 437 | module_exit(exit_fw) |
| 438 | MODULE_LICENSE("GPL"); |