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Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* net/sched/sch_dsmark.c - Differentiated Services field marker */ |
3 | ||
4 | /* Written 1998-2000 by Werner Almesberger, EPFL ICA */ | |
5 | ||
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/init.h> | |
5a0e3ad6 | 9 | #include <linux/slab.h> |
1da177e4 LT |
10 | #include <linux/types.h> |
11 | #include <linux/string.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/skbuff.h> | |
1da177e4 | 14 | #include <linux/rtnetlink.h> |
5b0ac72b | 15 | #include <linux/bitops.h> |
1da177e4 | 16 | #include <net/pkt_sched.h> |
cf1facda | 17 | #include <net/pkt_cls.h> |
1da177e4 LT |
18 | #include <net/dsfield.h> |
19 | #include <net/inet_ecn.h> | |
20 | #include <asm/byteorder.h> | |
21 | ||
1da177e4 LT |
22 | /* |
23 | * classid class marking | |
24 | * ------- ----- ------- | |
25 | * n/a 0 n/a | |
26 | * x:0 1 use entry [0] | |
27 | * ... ... ... | |
28 | * x:y y>0 y+1 use entry [y] | |
29 | * ... ... ... | |
30 | * x:indices-1 indices use entry [indices-1] | |
31 | * ... ... ... | |
32 | * x:y y+1 use entry [y & (indices-1)] | |
33 | * ... ... ... | |
34 | * 0xffff 0x10000 use entry [indices-1] | |
35 | */ | |
36 | ||
37 | ||
38 | #define NO_DEFAULT_INDEX (1 << 16) | |
39 | ||
47bbbb30 ED |
40 | struct mask_value { |
41 | u8 mask; | |
42 | u8 value; | |
43 | }; | |
44 | ||
1da177e4 LT |
45 | struct dsmark_qdisc_data { |
46 | struct Qdisc *q; | |
25d8c0d5 | 47 | struct tcf_proto __rcu *filter_list; |
6529eaba | 48 | struct tcf_block *block; |
47bbbb30 | 49 | struct mask_value *mv; |
af0d1141 | 50 | u16 indices; |
47bbbb30 | 51 | u8 set_tc_index; |
af0d1141 | 52 | u32 default_index; /* index range is 0...0xffff */ |
47bbbb30 ED |
53 | #define DSMARK_EMBEDDED_SZ 16 |
54 | struct mask_value embedded[DSMARK_EMBEDDED_SZ]; | |
1da177e4 LT |
55 | }; |
56 | ||
758cc43c TG |
57 | static inline int dsmark_valid_index(struct dsmark_qdisc_data *p, u16 index) |
58 | { | |
17569fae | 59 | return index <= p->indices && index > 0; |
758cc43c | 60 | } |
1da177e4 LT |
61 | |
62 | /* ------------------------- Class/flow operations ------------------------- */ | |
63 | ||
af0d1141 | 64 | static int dsmark_graft(struct Qdisc *sch, unsigned long arg, |
653d6fd6 AA |
65 | struct Qdisc *new, struct Qdisc **old, |
66 | struct netlink_ext_ack *extack) | |
1da177e4 | 67 | { |
81da99ed | 68 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1da177e4 | 69 | |
c76f2a2c YY |
70 | pr_debug("%s(sch %p,[qdisc %p],new %p,old %p)\n", |
71 | __func__, sch, p, new, old); | |
486b53e5 TG |
72 | |
73 | if (new == NULL) { | |
3511c913 | 74 | new = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, |
a38a9882 | 75 | sch->handle, NULL); |
486b53e5 TG |
76 | if (new == NULL) |
77 | new = &noop_qdisc; | |
78 | } | |
79 | ||
86a7996c | 80 | *old = qdisc_replace(sch, new, &p->q); |
10297b99 | 81 | return 0; |
1da177e4 LT |
82 | } |
83 | ||
1da177e4 LT |
84 | static struct Qdisc *dsmark_leaf(struct Qdisc *sch, unsigned long arg) |
85 | { | |
81da99ed SH |
86 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
87 | return p->q; | |
1da177e4 LT |
88 | } |
89 | ||
143976ce | 90 | static unsigned long dsmark_find(struct Qdisc *sch, u32 classid) |
1da177e4 | 91 | { |
af0d1141 | 92 | return TC_H_MIN(classid) + 1; |
1da177e4 LT |
93 | } |
94 | ||
1da177e4 | 95 | static unsigned long dsmark_bind_filter(struct Qdisc *sch, |
af0d1141 | 96 | unsigned long parent, u32 classid) |
1da177e4 | 97 | { |
143976ce WC |
98 | pr_debug("%s(sch %p,[qdisc %p],classid %x)\n", |
99 | __func__, sch, qdisc_priv(sch), classid); | |
100 | ||
101 | return dsmark_find(sch, classid); | |
1da177e4 LT |
102 | } |
103 | ||
143976ce | 104 | static void dsmark_unbind_filter(struct Qdisc *sch, unsigned long cl) |
1da177e4 LT |
105 | { |
106 | } | |
107 | ||
27a3421e PM |
108 | static const struct nla_policy dsmark_policy[TCA_DSMARK_MAX + 1] = { |
109 | [TCA_DSMARK_INDICES] = { .type = NLA_U16 }, | |
110 | [TCA_DSMARK_DEFAULT_INDEX] = { .type = NLA_U16 }, | |
111 | [TCA_DSMARK_SET_TC_INDEX] = { .type = NLA_FLAG }, | |
112 | [TCA_DSMARK_MASK] = { .type = NLA_U8 }, | |
113 | [TCA_DSMARK_VALUE] = { .type = NLA_U8 }, | |
114 | }; | |
115 | ||
1da177e4 | 116 | static int dsmark_change(struct Qdisc *sch, u32 classid, u32 parent, |
793d81d6 AA |
117 | struct nlattr **tca, unsigned long *arg, |
118 | struct netlink_ext_ack *extack) | |
1da177e4 | 119 | { |
81da99ed | 120 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1e90474c PM |
121 | struct nlattr *opt = tca[TCA_OPTIONS]; |
122 | struct nlattr *tb[TCA_DSMARK_MAX + 1]; | |
758cc43c | 123 | int err = -EINVAL; |
1da177e4 | 124 | |
c76f2a2c YY |
125 | pr_debug("%s(sch %p,[qdisc %p],classid %x,parent %x), arg 0x%lx\n", |
126 | __func__, sch, p, classid, parent, *arg); | |
758cc43c TG |
127 | |
128 | if (!dsmark_valid_index(p, *arg)) { | |
129 | err = -ENOENT; | |
1e90474c | 130 | goto errout; |
1da177e4 | 131 | } |
1da177e4 | 132 | |
cee63723 | 133 | if (!opt) |
1e90474c | 134 | goto errout; |
758cc43c | 135 | |
8cb08174 JB |
136 | err = nla_parse_nested_deprecated(tb, TCA_DSMARK_MAX, opt, |
137 | dsmark_policy, NULL); | |
cee63723 | 138 | if (err < 0) |
27a3421e | 139 | goto errout; |
cee63723 | 140 | |
27a3421e | 141 | if (tb[TCA_DSMARK_VALUE]) |
47bbbb30 | 142 | p->mv[*arg - 1].value = nla_get_u8(tb[TCA_DSMARK_VALUE]); |
10297b99 | 143 | |
1e90474c | 144 | if (tb[TCA_DSMARK_MASK]) |
47bbbb30 | 145 | p->mv[*arg - 1].mask = nla_get_u8(tb[TCA_DSMARK_MASK]); |
758cc43c TG |
146 | |
147 | err = 0; | |
148 | ||
1e90474c | 149 | errout: |
758cc43c TG |
150 | return err; |
151 | } | |
1da177e4 | 152 | |
af0d1141 | 153 | static int dsmark_delete(struct Qdisc *sch, unsigned long arg) |
1da177e4 | 154 | { |
81da99ed | 155 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1da177e4 | 156 | |
af0d1141 | 157 | if (!dsmark_valid_index(p, arg)) |
1da177e4 | 158 | return -EINVAL; |
10297b99 | 159 | |
47bbbb30 ED |
160 | p->mv[arg - 1].mask = 0xff; |
161 | p->mv[arg - 1].value = 0; | |
af0d1141 | 162 | |
1da177e4 LT |
163 | return 0; |
164 | } | |
165 | ||
9d127fbd | 166 | static void dsmark_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
1da177e4 | 167 | { |
81da99ed | 168 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1da177e4 LT |
169 | int i; |
170 | ||
c76f2a2c YY |
171 | pr_debug("%s(sch %p,[qdisc %p],walker %p)\n", |
172 | __func__, sch, p, walker); | |
af0d1141 | 173 | |
1da177e4 LT |
174 | if (walker->stop) |
175 | return; | |
af0d1141 | 176 | |
1da177e4 | 177 | for (i = 0; i < p->indices; i++) { |
47bbbb30 | 178 | if (p->mv[i].mask == 0xff && !p->mv[i].value) |
0451eb07 | 179 | goto ignore; |
1da177e4 | 180 | if (walker->count >= walker->skip) { |
cc7ec456 | 181 | if (walker->fn(sch, i + 1, walker) < 0) { |
1da177e4 LT |
182 | walker->stop = 1; |
183 | break; | |
184 | } | |
185 | } | |
10297b99 | 186 | ignore: |
0451eb07 | 187 | walker->count++; |
10297b99 | 188 | } |
1da177e4 LT |
189 | } |
190 | ||
cbaacc4e AA |
191 | static struct tcf_block *dsmark_tcf_block(struct Qdisc *sch, unsigned long cl, |
192 | struct netlink_ext_ack *extack) | |
1da177e4 | 193 | { |
81da99ed | 194 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
6529eaba JP |
195 | |
196 | return p->block; | |
1da177e4 LT |
197 | } |
198 | ||
1da177e4 LT |
199 | /* --------------------------- Qdisc operations ---------------------------- */ |
200 | ||
520ac30f ED |
201 | static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
202 | struct sk_buff **to_free) | |
1da177e4 | 203 | { |
f6bab199 | 204 | unsigned int len = qdisc_pkt_len(skb); |
81da99ed | 205 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
af0d1141 TG |
206 | int err; |
207 | ||
c76f2a2c | 208 | pr_debug("%s(skb %p,sch %p,[qdisc %p])\n", __func__, skb, sch, p); |
1da177e4 | 209 | |
1da177e4 | 210 | if (p->set_tc_index) { |
aea92fb2 ED |
211 | int wlen = skb_network_offset(skb); |
212 | ||
d8b9605d | 213 | switch (tc_skb_protocol(skb)) { |
60678040 | 214 | case htons(ETH_P_IP): |
aea92fb2 ED |
215 | wlen += sizeof(struct iphdr); |
216 | if (!pskb_may_pull(skb, wlen) || | |
217 | skb_try_make_writable(skb, wlen)) | |
9d127fbd | 218 | goto drop; |
4c30719f | 219 | |
9d127fbd SH |
220 | skb->tc_index = ipv4_get_dsfield(ip_hdr(skb)) |
221 | & ~INET_ECN_MASK; | |
222 | break; | |
4c30719f | 223 | |
60678040 | 224 | case htons(ETH_P_IPV6): |
aea92fb2 ED |
225 | wlen += sizeof(struct ipv6hdr); |
226 | if (!pskb_may_pull(skb, wlen) || | |
227 | skb_try_make_writable(skb, wlen)) | |
9d127fbd | 228 | goto drop; |
4c30719f | 229 | |
9d127fbd SH |
230 | skb->tc_index = ipv6_get_dsfield(ipv6_hdr(skb)) |
231 | & ~INET_ECN_MASK; | |
232 | break; | |
233 | default: | |
234 | skb->tc_index = 0; | |
235 | break; | |
3ff50b79 | 236 | } |
1da177e4 | 237 | } |
af0d1141 TG |
238 | |
239 | if (TC_H_MAJ(skb->priority) == sch->handle) | |
1da177e4 | 240 | skb->tc_index = TC_H_MIN(skb->priority); |
af0d1141 TG |
241 | else { |
242 | struct tcf_result res; | |
25d8c0d5 | 243 | struct tcf_proto *fl = rcu_dereference_bh(p->filter_list); |
87d83093 | 244 | int result = tcf_classify(skb, fl, &res, false); |
af0d1141 | 245 | |
81da99ed | 246 | pr_debug("result %d class 0x%04x\n", result, res.classid); |
af0d1141 | 247 | |
1da177e4 | 248 | switch (result) { |
f6853e2d PM |
249 | #ifdef CONFIG_NET_CLS_ACT |
250 | case TC_ACT_QUEUED: | |
251 | case TC_ACT_STOLEN: | |
e25ea21f | 252 | case TC_ACT_TRAP: |
520ac30f | 253 | __qdisc_drop(skb, to_free); |
378a2f09 | 254 | return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
4c30719f | 255 | |
f6853e2d | 256 | case TC_ACT_SHOT: |
4c30719f | 257 | goto drop; |
1da177e4 | 258 | #endif |
c3bc7cff | 259 | case TC_ACT_OK: |
f6853e2d PM |
260 | skb->tc_index = TC_H_MIN(res.classid); |
261 | break; | |
4c30719f | 262 | |
f6853e2d PM |
263 | default: |
264 | if (p->default_index != NO_DEFAULT_INDEX) | |
265 | skb->tc_index = p->default_index; | |
266 | break; | |
3ff50b79 | 267 | } |
1da177e4 | 268 | } |
1da177e4 | 269 | |
520ac30f | 270 | err = qdisc_enqueue(skb, p->q, to_free); |
af0d1141 | 271 | if (err != NET_XMIT_SUCCESS) { |
378a2f09 | 272 | if (net_xmit_drop_count(err)) |
25331d6c | 273 | qdisc_qstats_drop(sch); |
af0d1141 | 274 | return err; |
1da177e4 | 275 | } |
af0d1141 | 276 | |
f6bab199 | 277 | sch->qstats.backlog += len; |
1da177e4 | 278 | sch->q.qlen++; |
1da177e4 | 279 | |
af0d1141 | 280 | return NET_XMIT_SUCCESS; |
4c30719f SH |
281 | |
282 | drop: | |
520ac30f | 283 | qdisc_drop(skb, sch, to_free); |
c27f339a | 284 | return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
af0d1141 | 285 | } |
1da177e4 LT |
286 | |
287 | static struct sk_buff *dsmark_dequeue(struct Qdisc *sch) | |
288 | { | |
81da99ed | 289 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1da177e4 | 290 | struct sk_buff *skb; |
af0d1141 TG |
291 | u32 index; |
292 | ||
c76f2a2c | 293 | pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p); |
1da177e4 | 294 | |
f8b33d8e | 295 | skb = qdisc_dequeue_peeked(p->q); |
af0d1141 | 296 | if (skb == NULL) |
1da177e4 | 297 | return NULL; |
af0d1141 | 298 | |
9190b3b3 | 299 | qdisc_bstats_update(sch, skb); |
bdf17661 | 300 | qdisc_qstats_backlog_dec(sch, skb); |
1da177e4 | 301 | sch->q.qlen--; |
af0d1141 TG |
302 | |
303 | index = skb->tc_index & (p->indices - 1); | |
81da99ed | 304 | pr_debug("index %d->%d\n", skb->tc_index, index); |
af0d1141 | 305 | |
d8b9605d | 306 | switch (tc_skb_protocol(skb)) { |
60678040 | 307 | case htons(ETH_P_IP): |
47bbbb30 ED |
308 | ipv4_change_dsfield(ip_hdr(skb), p->mv[index].mask, |
309 | p->mv[index].value); | |
1da177e4 | 310 | break; |
60678040 | 311 | case htons(ETH_P_IPV6): |
47bbbb30 ED |
312 | ipv6_change_dsfield(ipv6_hdr(skb), p->mv[index].mask, |
313 | p->mv[index].value); | |
1da177e4 | 314 | break; |
9d127fbd SH |
315 | default: |
316 | /* | |
317 | * Only complain if a change was actually attempted. | |
318 | * This way, we can send non-IP traffic through dsmark | |
319 | * and don't need yet another qdisc as a bypass. | |
320 | */ | |
47bbbb30 | 321 | if (p->mv[index].mask != 0xff || p->mv[index].value) |
c76f2a2c | 322 | pr_warn("%s: unsupported protocol %d\n", |
d8b9605d | 323 | __func__, ntohs(tc_skb_protocol(skb))); |
9d127fbd | 324 | break; |
3ff50b79 | 325 | } |
af0d1141 | 326 | |
1da177e4 LT |
327 | return skb; |
328 | } | |
329 | ||
8e3af978 JP |
330 | static struct sk_buff *dsmark_peek(struct Qdisc *sch) |
331 | { | |
332 | struct dsmark_qdisc_data *p = qdisc_priv(sch); | |
333 | ||
c76f2a2c | 334 | pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p); |
8e3af978 JP |
335 | |
336 | return p->q->ops->peek(p->q); | |
337 | } | |
338 | ||
e63d7dfd AA |
339 | static int dsmark_init(struct Qdisc *sch, struct nlattr *opt, |
340 | struct netlink_ext_ack *extack) | |
1da177e4 | 341 | { |
81da99ed | 342 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1e90474c | 343 | struct nlattr *tb[TCA_DSMARK_MAX + 1]; |
9d4f97f9 | 344 | int err = -EINVAL; |
758cc43c TG |
345 | u32 default_index = NO_DEFAULT_INDEX; |
346 | u16 indices; | |
47bbbb30 | 347 | int i; |
758cc43c | 348 | |
c76f2a2c | 349 | pr_debug("%s(sch %p,[qdisc %p],opt %p)\n", __func__, sch, p, opt); |
758cc43c | 350 | |
cee63723 PM |
351 | if (!opt) |
352 | goto errout; | |
353 | ||
8d1a77f9 | 354 | err = tcf_block_get(&p->block, &p->filter_list, sch, extack); |
6529eaba JP |
355 | if (err) |
356 | return err; | |
357 | ||
8cb08174 JB |
358 | err = nla_parse_nested_deprecated(tb, TCA_DSMARK_MAX, opt, |
359 | dsmark_policy, NULL); | |
cee63723 | 360 | if (err < 0) |
758cc43c TG |
361 | goto errout; |
362 | ||
cee63723 | 363 | err = -EINVAL; |
474f0813 ED |
364 | if (!tb[TCA_DSMARK_INDICES]) |
365 | goto errout; | |
1e90474c | 366 | indices = nla_get_u16(tb[TCA_DSMARK_INDICES]); |
5b0ac72b DM |
367 | |
368 | if (hweight32(indices) != 1) | |
758cc43c TG |
369 | goto errout; |
370 | ||
27a3421e | 371 | if (tb[TCA_DSMARK_DEFAULT_INDEX]) |
1e90474c | 372 | default_index = nla_get_u16(tb[TCA_DSMARK_DEFAULT_INDEX]); |
758cc43c | 373 | |
47bbbb30 ED |
374 | if (indices <= DSMARK_EMBEDDED_SZ) |
375 | p->mv = p->embedded; | |
376 | else | |
377 | p->mv = kmalloc_array(indices, sizeof(*p->mv), GFP_KERNEL); | |
378 | if (!p->mv) { | |
758cc43c TG |
379 | err = -ENOMEM; |
380 | goto errout; | |
1da177e4 | 381 | } |
47bbbb30 ED |
382 | for (i = 0; i < indices; i++) { |
383 | p->mv[i].mask = 0xff; | |
384 | p->mv[i].value = 0; | |
385 | } | |
758cc43c TG |
386 | p->indices = indices; |
387 | p->default_index = default_index; | |
1e90474c | 388 | p->set_tc_index = nla_get_flag(tb[TCA_DSMARK_SET_TC_INDEX]); |
758cc43c | 389 | |
a38a9882 AA |
390 | p->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, sch->handle, |
391 | NULL); | |
758cc43c | 392 | if (p->q == NULL) |
1da177e4 | 393 | p->q = &noop_qdisc; |
49b49971 JK |
394 | else |
395 | qdisc_hash_add(p->q, true); | |
758cc43c | 396 | |
c76f2a2c | 397 | pr_debug("%s: qdisc %p\n", __func__, p->q); |
758cc43c TG |
398 | |
399 | err = 0; | |
400 | errout: | |
758cc43c | 401 | return err; |
1da177e4 LT |
402 | } |
403 | ||
1da177e4 LT |
404 | static void dsmark_reset(struct Qdisc *sch) |
405 | { | |
81da99ed | 406 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1da177e4 | 407 | |
c76f2a2c | 408 | pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p); |
1da177e4 | 409 | qdisc_reset(p->q); |
bdf17661 | 410 | sch->qstats.backlog = 0; |
1da177e4 LT |
411 | sch->q.qlen = 0; |
412 | } | |
413 | ||
1da177e4 LT |
414 | static void dsmark_destroy(struct Qdisc *sch) |
415 | { | |
81da99ed | 416 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1da177e4 | 417 | |
c76f2a2c | 418 | pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p); |
af0d1141 | 419 | |
6529eaba | 420 | tcf_block_put(p->block); |
86bd446b | 421 | qdisc_put(p->q); |
47bbbb30 ED |
422 | if (p->mv != p->embedded) |
423 | kfree(p->mv); | |
1da177e4 LT |
424 | } |
425 | ||
1da177e4 | 426 | static int dsmark_dump_class(struct Qdisc *sch, unsigned long cl, |
02f23f09 | 427 | struct sk_buff *skb, struct tcmsg *tcm) |
1da177e4 | 428 | { |
81da99ed | 429 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1e90474c | 430 | struct nlattr *opts = NULL; |
1da177e4 | 431 | |
c76f2a2c | 432 | pr_debug("%s(sch %p,[qdisc %p],class %ld\n", __func__, sch, p, cl); |
02f23f09 TG |
433 | |
434 | if (!dsmark_valid_index(p, cl)) | |
1da177e4 | 435 | return -EINVAL; |
02f23f09 | 436 | |
cc7ec456 | 437 | tcm->tcm_handle = TC_H_MAKE(TC_H_MAJ(sch->handle), cl - 1); |
cdc7f8e3 | 438 | tcm->tcm_info = p->q->handle; |
02f23f09 | 439 | |
ae0be8de | 440 | opts = nla_nest_start_noflag(skb, TCA_OPTIONS); |
1e90474c PM |
441 | if (opts == NULL) |
442 | goto nla_put_failure; | |
47bbbb30 ED |
443 | if (nla_put_u8(skb, TCA_DSMARK_MASK, p->mv[cl - 1].mask) || |
444 | nla_put_u8(skb, TCA_DSMARK_VALUE, p->mv[cl - 1].value)) | |
1b34ec43 | 445 | goto nla_put_failure; |
02f23f09 | 446 | |
1e90474c | 447 | return nla_nest_end(skb, opts); |
1da177e4 | 448 | |
1e90474c | 449 | nla_put_failure: |
bc3ed28c TG |
450 | nla_nest_cancel(skb, opts); |
451 | return -EMSGSIZE; | |
1da177e4 LT |
452 | } |
453 | ||
454 | static int dsmark_dump(struct Qdisc *sch, struct sk_buff *skb) | |
455 | { | |
81da99ed | 456 | struct dsmark_qdisc_data *p = qdisc_priv(sch); |
1e90474c | 457 | struct nlattr *opts = NULL; |
1da177e4 | 458 | |
ae0be8de | 459 | opts = nla_nest_start_noflag(skb, TCA_OPTIONS); |
1e90474c PM |
460 | if (opts == NULL) |
461 | goto nla_put_failure; | |
1b34ec43 DM |
462 | if (nla_put_u16(skb, TCA_DSMARK_INDICES, p->indices)) |
463 | goto nla_put_failure; | |
02f23f09 | 464 | |
1b34ec43 DM |
465 | if (p->default_index != NO_DEFAULT_INDEX && |
466 | nla_put_u16(skb, TCA_DSMARK_DEFAULT_INDEX, p->default_index)) | |
467 | goto nla_put_failure; | |
1da177e4 | 468 | |
1b34ec43 DM |
469 | if (p->set_tc_index && |
470 | nla_put_flag(skb, TCA_DSMARK_SET_TC_INDEX)) | |
471 | goto nla_put_failure; | |
02f23f09 | 472 | |
1e90474c | 473 | return nla_nest_end(skb, opts); |
1da177e4 | 474 | |
1e90474c | 475 | nla_put_failure: |
bc3ed28c TG |
476 | nla_nest_cancel(skb, opts); |
477 | return -EMSGSIZE; | |
1da177e4 LT |
478 | } |
479 | ||
20fea08b | 480 | static const struct Qdisc_class_ops dsmark_class_ops = { |
1da177e4 LT |
481 | .graft = dsmark_graft, |
482 | .leaf = dsmark_leaf, | |
143976ce | 483 | .find = dsmark_find, |
1da177e4 LT |
484 | .change = dsmark_change, |
485 | .delete = dsmark_delete, | |
486 | .walk = dsmark_walk, | |
6529eaba | 487 | .tcf_block = dsmark_tcf_block, |
1da177e4 | 488 | .bind_tcf = dsmark_bind_filter, |
143976ce | 489 | .unbind_tcf = dsmark_unbind_filter, |
1da177e4 LT |
490 | .dump = dsmark_dump_class, |
491 | }; | |
492 | ||
20fea08b | 493 | static struct Qdisc_ops dsmark_qdisc_ops __read_mostly = { |
1da177e4 LT |
494 | .next = NULL, |
495 | .cl_ops = &dsmark_class_ops, | |
496 | .id = "dsmark", | |
497 | .priv_size = sizeof(struct dsmark_qdisc_data), | |
498 | .enqueue = dsmark_enqueue, | |
499 | .dequeue = dsmark_dequeue, | |
8e3af978 | 500 | .peek = dsmark_peek, |
1da177e4 LT |
501 | .init = dsmark_init, |
502 | .reset = dsmark_reset, | |
503 | .destroy = dsmark_destroy, | |
504 | .change = NULL, | |
505 | .dump = dsmark_dump, | |
506 | .owner = THIS_MODULE, | |
507 | }; | |
508 | ||
509 | static int __init dsmark_module_init(void) | |
510 | { | |
511 | return register_qdisc(&dsmark_qdisc_ops); | |
512 | } | |
af0d1141 | 513 | |
10297b99 | 514 | static void __exit dsmark_module_exit(void) |
1da177e4 LT |
515 | { |
516 | unregister_qdisc(&dsmark_qdisc_ops); | |
517 | } | |
af0d1141 | 518 | |
1da177e4 LT |
519 | module_init(dsmark_module_init) |
520 | module_exit(dsmark_module_exit) | |
af0d1141 | 521 | |
1da177e4 | 522 | MODULE_LICENSE("GPL"); |