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 | |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 32 | #define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *)) |
| 33 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 34 | struct fw_head { |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 35 | struct fw_filter *ht[HTSIZE]; |
Patrick McHardy | b4e9b52 | 2006-08-25 16:11:42 -0700 | [diff] [blame] | 36 | u32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | }; |
| 38 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 39 | struct fw_filter { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | struct fw_filter *next; |
| 41 | u32 id; |
| 42 | struct tcf_result res; |
| 43 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 44 | int ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #endif /* CONFIG_NET_CLS_IND */ |
| 46 | struct tcf_exts exts; |
| 47 | }; |
| 48 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 49 | static inline int fw_hash(u32 handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 51 | if (HTSIZE == 4096) |
| 52 | return ((handle >> 24) & 0xFFF) ^ |
| 53 | ((handle >> 12) & 0xFFF) ^ |
| 54 | (handle & 0xFFF); |
| 55 | else if (HTSIZE == 2048) |
| 56 | return ((handle >> 22) & 0x7FF) ^ |
| 57 | ((handle >> 11) & 0x7FF) ^ |
| 58 | (handle & 0x7FF); |
| 59 | else if (HTSIZE == 1024) |
| 60 | return ((handle >> 20) & 0x3FF) ^ |
| 61 | ((handle >> 10) & 0x3FF) ^ |
| 62 | (handle & 0x3FF); |
| 63 | else if (HTSIZE == 512) |
| 64 | return (handle >> 27) ^ |
| 65 | ((handle >> 18) & 0x1FF) ^ |
| 66 | ((handle >> 9) & 0x1FF) ^ |
| 67 | (handle & 0x1FF); |
| 68 | else if (HTSIZE == 256) { |
| 69 | u8 *t = (u8 *) &handle; |
| 70 | return t[0] ^ t[1] ^ t[2] ^ t[3]; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 71 | } else |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 72 | return handle & (HTSIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 75 | 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] | 76 | struct tcf_result *res) |
| 77 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 78 | struct fw_head *head = tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | struct fw_filter *f; |
| 80 | int r; |
Patrick McHardy | 5c804bf | 2006-12-05 13:46:13 -0800 | [diff] [blame] | 81 | u32 id = skb->mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | if (head != NULL) { |
Patrick McHardy | 5c804bf | 2006-12-05 13:46:13 -0800 | [diff] [blame] | 84 | id &= head->mask; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 85 | for (f = head->ht[fw_hash(id)]; f; f = f->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | if (f->id == id) { |
| 87 | *res = f->res; |
| 88 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 89 | if (!tcf_match_indev(skb, f->ifindex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | continue; |
| 91 | #endif /* CONFIG_NET_CLS_IND */ |
| 92 | r = tcf_exts_exec(skb, &f->exts, res); |
| 93 | if (r < 0) |
| 94 | continue; |
| 95 | |
| 96 | return r; |
| 97 | } |
| 98 | } |
| 99 | } else { |
| 100 | /* old method */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 101 | if (id && (TC_H_MAJ(id) == 0 || |
| 102 | !(TC_H_MAJ(id ^ tp->q->handle)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | res->classid = id; |
| 104 | res->class = 0; |
| 105 | return 0; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | return -1; |
| 110 | } |
| 111 | |
| 112 | static unsigned long fw_get(struct tcf_proto *tp, u32 handle) |
| 113 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 114 | struct fw_head *head = tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | struct fw_filter *f; |
| 116 | |
| 117 | if (head == NULL) |
| 118 | return 0; |
| 119 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 120 | for (f = head->ht[fw_hash(handle)]; f; f = f->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | if (f->id == handle) |
| 122 | return (unsigned long)f; |
| 123 | } |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | static void fw_put(struct tcf_proto *tp, unsigned long f) |
| 128 | { |
| 129 | } |
| 130 | |
| 131 | static int fw_init(struct tcf_proto *tp) |
| 132 | { |
| 133 | return 0; |
| 134 | } |
| 135 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 136 | static void fw_delete_filter(struct tcf_proto *tp, struct fw_filter *f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | { |
| 138 | tcf_unbind_filter(tp, &f->res); |
| 139 | tcf_exts_destroy(tp, &f->exts); |
| 140 | kfree(f); |
| 141 | } |
| 142 | |
| 143 | static void fw_destroy(struct tcf_proto *tp) |
| 144 | { |
Patrick McHardy | 47a1a1d | 2008-11-19 08:03:09 +0000 | [diff] [blame] | 145 | struct fw_head *head = tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | struct fw_filter *f; |
| 147 | int h; |
| 148 | |
| 149 | if (head == NULL) |
| 150 | return; |
| 151 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 152 | for (h = 0; h < HTSIZE; h++) { |
| 153 | while ((f = head->ht[h]) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | head->ht[h] = f->next; |
| 155 | fw_delete_filter(tp, f); |
| 156 | } |
| 157 | } |
| 158 | kfree(head); |
| 159 | } |
| 160 | |
| 161 | static int fw_delete(struct tcf_proto *tp, unsigned long arg) |
| 162 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 163 | struct fw_head *head = tp->root; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 164 | struct fw_filter *f = (struct fw_filter *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | struct fw_filter **fp; |
| 166 | |
| 167 | if (head == NULL || f == NULL) |
| 168 | goto out; |
| 169 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 170 | for (fp = &head->ht[fw_hash(f->id)]; *fp; fp = &(*fp)->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | if (*fp == f) { |
| 172 | tcf_tree_lock(tp); |
| 173 | *fp = f->next; |
| 174 | tcf_tree_unlock(tp); |
| 175 | fw_delete_filter(tp, f); |
| 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, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 191 | struct nlattr **tb, struct nlattr **tca, unsigned long base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 193 | struct fw_head *head = 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); |
| 199 | err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e); |
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: |
| 232 | tcf_exts_destroy(tp, &e); |
| 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, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | unsigned long *arg) |
| 241 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 242 | struct fw_head *head = 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) |
| 249 | return handle ? -EINVAL : 0; |
| 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 | |
| 255 | if (f != NULL) { |
| 256 | if (f->id != handle && handle) |
| 257 | return -EINVAL; |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 258 | return fw_change_attrs(net, tp, f, tb, tca, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | if (!handle) |
| 262 | return -EINVAL; |
| 263 | |
| 264 | if (head == NULL) { |
Patrick McHardy | b4e9b52 | 2006-08-25 16:11:42 -0700 | [diff] [blame] | 265 | u32 mask = 0xFFFFFFFF; |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 266 | if (tb[TCA_FW_MASK]) |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 267 | mask = nla_get_u32(tb[TCA_FW_MASK]); |
Patrick McHardy | b4e9b52 | 2006-08-25 16:11:42 -0700 | [diff] [blame] | 268 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 269 | head = kzalloc(sizeof(struct fw_head), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | if (head == NULL) |
| 271 | return -ENOBUFS; |
Patrick McHardy | b4e9b52 | 2006-08-25 16:11:42 -0700 | [diff] [blame] | 272 | head->mask = mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | tcf_tree_lock(tp); |
| 275 | tp->root = head; |
| 276 | tcf_tree_unlock(tp); |
| 277 | } |
| 278 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 279 | f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if (f == NULL) |
| 281 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 283 | tcf_exts_init(&f->exts, TCA_FW_ACT, TCA_FW_POLICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | f->id = handle; |
| 285 | |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 286 | err = fw_change_attrs(net, tp, f, tb, tca, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | if (err < 0) |
| 288 | goto errout; |
| 289 | |
| 290 | f->next = head->ht[fw_hash(handle)]; |
| 291 | tcf_tree_lock(tp); |
| 292 | head->ht[fw_hash(handle)] = f; |
| 293 | tcf_tree_unlock(tp); |
| 294 | |
| 295 | *arg = (unsigned long)f; |
| 296 | return 0; |
| 297 | |
| 298 | errout: |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 299 | kfree(f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | return err; |
| 301 | } |
| 302 | |
| 303 | static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 304 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 305 | struct fw_head *head = tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | int h; |
| 307 | |
| 308 | if (head == NULL) |
| 309 | arg->stop = 1; |
| 310 | |
| 311 | if (arg->stop) |
| 312 | return; |
| 313 | |
Thomas Graf | c5c13fa | 2005-04-24 20:19:54 -0700 | [diff] [blame] | 314 | for (h = 0; h < HTSIZE; h++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | struct fw_filter *f; |
| 316 | |
| 317 | for (f = head->ht[h]; f; f = f->next) { |
| 318 | if (arg->count < arg->skip) { |
| 319 | arg->count++; |
| 320 | continue; |
| 321 | } |
| 322 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { |
| 323 | arg->stop = 1; |
| 324 | return; |
| 325 | } |
| 326 | arg->count++; |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 331 | 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] | 332 | struct sk_buff *skb, struct tcmsg *t) |
| 333 | { |
WANG Cong | a8701a6 | 2014-01-09 16:14:03 -0800 | [diff] [blame] | 334 | struct fw_head *head = tp->root; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 335 | struct fw_filter *f = (struct fw_filter *)fh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 336 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 337 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | if (f == NULL) |
| 340 | return skb->len; |
| 341 | |
| 342 | t->tcm_handle = f->id; |
| 343 | |
| 344 | if (!f->res.classid && !tcf_exts_is_available(&f->exts)) |
| 345 | return skb->len; |
| 346 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 347 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 348 | if (nest == NULL) |
| 349 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 351 | if (f->res.classid && |
| 352 | nla_put_u32(skb, TCA_FW_CLASSID, f->res.classid)) |
| 353 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | #ifdef CONFIG_NET_CLS_IND |
WANG Cong | 2519a60 | 2014-01-09 16:14:02 -0800 | [diff] [blame] | 355 | if (f->ifindex) { |
| 356 | struct net_device *dev; |
| 357 | dev = __dev_get_by_index(net, f->ifindex); |
| 358 | if (dev && nla_put_string(skb, TCA_FW_INDEV, dev->name)) |
| 359 | goto nla_put_failure; |
| 360 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | #endif /* CONFIG_NET_CLS_IND */ |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 362 | if (head->mask != 0xFFFFFFFF && |
| 363 | nla_put_u32(skb, TCA_FW_MASK, head->mask)) |
| 364 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 366 | if (tcf_exts_dump(skb, &f->exts) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 367 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 369 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
WANG Cong | 5da57f4 | 2013-12-15 20:15:07 -0800 | [diff] [blame] | 371 | if (tcf_exts_dump_stats(skb, &f->exts) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 372 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
| 374 | return skb->len; |
| 375 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 376 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 377 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return -1; |
| 379 | } |
| 380 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 381 | static struct tcf_proto_ops cls_fw_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | .kind = "fw", |
| 383 | .classify = fw_classify, |
| 384 | .init = fw_init, |
| 385 | .destroy = fw_destroy, |
| 386 | .get = fw_get, |
| 387 | .put = fw_put, |
| 388 | .change = fw_change, |
| 389 | .delete = fw_delete, |
| 390 | .walk = fw_walk, |
| 391 | .dump = fw_dump, |
| 392 | .owner = THIS_MODULE, |
| 393 | }; |
| 394 | |
| 395 | static int __init init_fw(void) |
| 396 | { |
| 397 | return register_tcf_proto_ops(&cls_fw_ops); |
| 398 | } |
| 399 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 400 | static void __exit exit_fw(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | { |
| 402 | unregister_tcf_proto_ops(&cls_fw_ops); |
| 403 | } |
| 404 | |
| 405 | module_init(init_fw) |
| 406 | module_exit(exit_fw) |
| 407 | MODULE_LICENSE("GPL"); |