Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/sch_prio.c Simple 3-band priority "scheduler". |
| 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> |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 10 | * Fixes: 19990609: J Hadi Salim <hadi@nortelnetworks.com>: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Init -- EINVAL when opt undefined |
| 12 | */ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/types.h> |
| 16 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/skbuff.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 20 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <net/pkt_sched.h> |
| 22 | |
| 23 | |
| 24 | struct prio_sched_data |
| 25 | { |
| 26 | int bands; |
| 27 | struct tcf_proto *filter_list; |
| 28 | u8 prio2band[TC_PRIO_MAX+1]; |
| 29 | struct Qdisc *queues[TCQ_PRIO_BANDS]; |
| 30 | }; |
| 31 | |
| 32 | |
| 33 | static struct Qdisc * |
| 34 | prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) |
| 35 | { |
| 36 | struct prio_sched_data *q = qdisc_priv(sch); |
| 37 | u32 band = skb->priority; |
| 38 | struct tcf_result res; |
Patrick McHardy | bdba91e | 2007-07-30 17:07:14 -0700 | [diff] [blame] | 39 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 41 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | if (TC_H_MAJ(skb->priority) != sch->handle) { |
Patrick McHardy | bdba91e | 2007-07-30 17:07:14 -0700 | [diff] [blame] | 43 | err = tc_classify(skb, q->filter_list, &res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #ifdef CONFIG_NET_CLS_ACT |
Lucas Nussbaum | dbaaa07 | 2007-08-30 22:35:46 -0700 | [diff] [blame] | 45 | switch (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | case TC_ACT_STOLEN: |
| 47 | case TC_ACT_QUEUED: |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 48 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | case TC_ACT_SHOT: |
| 50 | return NULL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 51 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #endif |
Patrick McHardy | bdba91e | 2007-07-30 17:07:14 -0700 | [diff] [blame] | 53 | if (!q->filter_list || err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | if (TC_H_MAJ(band)) |
| 55 | band = 0; |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 56 | return q->queues[q->prio2band[band&TC_PRIO_MAX]]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | } |
| 58 | band = res.classid; |
| 59 | } |
| 60 | band = TC_H_MIN(band) - 1; |
Jamal Hadi Salim | 3e5c2d3 | 2007-05-14 02:57:19 -0700 | [diff] [blame] | 61 | if (band >= q->bands) |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 62 | return q->queues[q->prio2band[0]]; |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | return q->queues[band]; |
| 65 | } |
| 66 | |
| 67 | static int |
| 68 | prio_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
| 69 | { |
| 70 | struct Qdisc *qdisc; |
| 71 | int ret; |
| 72 | |
| 73 | qdisc = prio_classify(skb, sch, &ret); |
| 74 | #ifdef CONFIG_NET_CLS_ACT |
| 75 | if (qdisc == NULL) { |
Jamal Hadi Salim | 29f1df6 | 2006-01-08 22:35:55 -0800 | [diff] [blame] | 76 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 77 | if (ret & __NET_XMIT_BYPASS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | sch->qstats.drops++; |
| 79 | kfree_skb(skb); |
| 80 | return ret; |
| 81 | } |
| 82 | #endif |
| 83 | |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 84 | ret = qdisc_enqueue(skb, qdisc); |
| 85 | if (ret == NET_XMIT_SUCCESS) { |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 86 | sch->bstats.bytes += qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | sch->bstats.packets++; |
| 88 | sch->q.qlen++; |
| 89 | return NET_XMIT_SUCCESS; |
| 90 | } |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 91 | if (net_xmit_drop_count(ret)) |
| 92 | sch->qstats.drops++; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 93 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | |
| 97 | static int |
| 98 | prio_requeue(struct sk_buff *skb, struct Qdisc* sch) |
| 99 | { |
| 100 | struct Qdisc *qdisc; |
| 101 | int ret; |
| 102 | |
| 103 | qdisc = prio_classify(skb, sch, &ret); |
| 104 | #ifdef CONFIG_NET_CLS_ACT |
| 105 | if (qdisc == NULL) { |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 106 | if (ret & __NET_XMIT_BYPASS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | sch->qstats.drops++; |
| 108 | kfree_skb(skb); |
| 109 | return ret; |
| 110 | } |
| 111 | #endif |
| 112 | |
| 113 | if ((ret = qdisc->ops->requeue(skb, qdisc)) == NET_XMIT_SUCCESS) { |
| 114 | sch->q.qlen++; |
| 115 | sch->qstats.requeues++; |
David S. Miller | 4cf7cb2 | 2008-08-17 22:45:17 -0700 | [diff] [blame^] | 116 | return NET_XMIT_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 118 | if (net_xmit_drop_count(ret)) |
| 119 | sch->qstats.drops++; |
Jussi Kivilinna | 0d40b6e | 2008-08-17 22:43:56 -0700 | [diff] [blame] | 120 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 124 | static struct sk_buff *prio_dequeue(struct Qdisc* sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | struct prio_sched_data *q = qdisc_priv(sch); |
| 127 | int prio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | for (prio = 0; prio < q->bands; prio++) { |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 130 | struct Qdisc *qdisc = q->queues[prio]; |
| 131 | struct sk_buff *skb = qdisc->dequeue(qdisc); |
| 132 | if (skb) { |
| 133 | sch->q.qlen--; |
| 134 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | } |
| 137 | return NULL; |
| 138 | |
| 139 | } |
| 140 | |
| 141 | static unsigned int prio_drop(struct Qdisc* sch) |
| 142 | { |
| 143 | struct prio_sched_data *q = qdisc_priv(sch); |
| 144 | int prio; |
| 145 | unsigned int len; |
| 146 | struct Qdisc *qdisc; |
| 147 | |
| 148 | for (prio = q->bands-1; prio >= 0; prio--) { |
| 149 | qdisc = q->queues[prio]; |
Patrick McHardy | 6d037a2 | 2006-03-20 19:00:49 -0800 | [diff] [blame] | 150 | if (qdisc->ops->drop && (len = qdisc->ops->drop(qdisc)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | sch->q.qlen--; |
| 152 | return len; |
| 153 | } |
| 154 | } |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | |
| 159 | static void |
| 160 | prio_reset(struct Qdisc* sch) |
| 161 | { |
| 162 | int prio; |
| 163 | struct prio_sched_data *q = qdisc_priv(sch); |
| 164 | |
| 165 | for (prio=0; prio<q->bands; prio++) |
| 166 | qdisc_reset(q->queues[prio]); |
| 167 | sch->q.qlen = 0; |
| 168 | } |
| 169 | |
| 170 | static void |
| 171 | prio_destroy(struct Qdisc* sch) |
| 172 | { |
| 173 | int prio; |
| 174 | struct prio_sched_data *q = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 176 | tcf_destroy_chain(&q->filter_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | for (prio=0; prio<q->bands; prio++) |
| 178 | qdisc_destroy(q->queues[prio]); |
| 179 | } |
| 180 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 181 | static int prio_tune(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | { |
| 183 | struct prio_sched_data *q = qdisc_priv(sch); |
Peter P Waskiewicz Jr | d62733c | 2007-06-28 21:04:31 -0700 | [diff] [blame] | 184 | struct tc_prio_qopt *qopt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | int i; |
| 186 | |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 187 | if (nla_len(opt) < sizeof(*qopt)) |
| 188 | return -EINVAL; |
| 189 | qopt = nla_data(opt); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 190 | |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 191 | if (qopt->bands > TCQ_PRIO_BANDS || qopt->bands < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | return -EINVAL; |
| 193 | |
| 194 | for (i=0; i<=TC_PRIO_MAX; i++) { |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 195 | if (qopt->priomap[i] >= qopt->bands) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | return -EINVAL; |
| 197 | } |
| 198 | |
| 199 | sch_tree_lock(sch); |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 200 | q->bands = qopt->bands; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | memcpy(q->prio2band, qopt->priomap, TC_PRIO_MAX+1); |
| 202 | |
| 203 | for (i=q->bands; i<TCQ_PRIO_BANDS; i++) { |
| 204 | struct Qdisc *child = xchg(&q->queues[i], &noop_qdisc); |
Patrick McHardy | 5e50da0 | 2006-11-29 17:36:20 -0800 | [diff] [blame] | 205 | if (child != &noop_qdisc) { |
| 206 | qdisc_tree_decrease_qlen(child, child->q.qlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | qdisc_destroy(child); |
Patrick McHardy | 5e50da0 | 2006-11-29 17:36:20 -0800 | [diff] [blame] | 208 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | sch_tree_unlock(sch); |
| 211 | |
Amnon Aaronsohn | dd914b4 | 2006-01-17 02:24:26 -0800 | [diff] [blame] | 212 | for (i=0; i<q->bands; i++) { |
| 213 | if (q->queues[i] == &noop_qdisc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | struct Qdisc *child; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 215 | child = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 216 | &pfifo_qdisc_ops, |
Patrick McHardy | 9f9afec | 2006-11-29 17:35:18 -0800 | [diff] [blame] | 217 | TC_H_MAKE(sch->handle, i + 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | if (child) { |
| 219 | sch_tree_lock(sch); |
Amnon Aaronsohn | dd914b4 | 2006-01-17 02:24:26 -0800 | [diff] [blame] | 220 | child = xchg(&q->queues[i], child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Patrick McHardy | 5e50da0 | 2006-11-29 17:36:20 -0800 | [diff] [blame] | 222 | if (child != &noop_qdisc) { |
| 223 | qdisc_tree_decrease_qlen(child, |
| 224 | child->q.qlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | qdisc_destroy(child); |
Patrick McHardy | 5e50da0 | 2006-11-29 17:36:20 -0800 | [diff] [blame] | 226 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | sch_tree_unlock(sch); |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | return 0; |
| 232 | } |
| 233 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 234 | static int prio_init(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
| 236 | struct prio_sched_data *q = qdisc_priv(sch); |
| 237 | int i; |
| 238 | |
| 239 | for (i=0; i<TCQ_PRIO_BANDS; i++) |
| 240 | q->queues[i] = &noop_qdisc; |
| 241 | |
| 242 | if (opt == NULL) { |
| 243 | return -EINVAL; |
| 244 | } else { |
| 245 | int err; |
| 246 | |
| 247 | if ((err= prio_tune(sch, opt)) != 0) |
| 248 | return err; |
| 249 | } |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static int prio_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 254 | { |
| 255 | struct prio_sched_data *q = qdisc_priv(sch); |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 256 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 257 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | struct tc_prio_qopt opt; |
| 259 | |
| 260 | opt.bands = q->bands; |
| 261 | memcpy(&opt.priomap, q->prio2band, TC_PRIO_MAX+1); |
Peter P Waskiewicz Jr | d62733c | 2007-06-28 21:04:31 -0700 | [diff] [blame] | 262 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 263 | nest = nla_nest_compat_start(skb, TCA_OPTIONS, sizeof(opt), &opt); |
| 264 | if (nest == NULL) |
| 265 | goto nla_put_failure; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 266 | nla_nest_compat_end(skb, nest); |
Peter P Waskiewicz Jr | d62733c | 2007-06-28 21:04:31 -0700 | [diff] [blame] | 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | return skb->len; |
| 269 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 270 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 271 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | return -1; |
| 273 | } |
| 274 | |
| 275 | static int prio_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, |
| 276 | struct Qdisc **old) |
| 277 | { |
| 278 | struct prio_sched_data *q = qdisc_priv(sch); |
| 279 | unsigned long band = arg - 1; |
| 280 | |
| 281 | if (band >= q->bands) |
| 282 | return -EINVAL; |
| 283 | |
| 284 | if (new == NULL) |
| 285 | new = &noop_qdisc; |
| 286 | |
| 287 | sch_tree_lock(sch); |
| 288 | *old = q->queues[band]; |
| 289 | q->queues[band] = new; |
Patrick McHardy | 5e50da0 | 2006-11-29 17:36:20 -0800 | [diff] [blame] | 290 | qdisc_tree_decrease_qlen(*old, (*old)->q.qlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | qdisc_reset(*old); |
| 292 | sch_tree_unlock(sch); |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | static struct Qdisc * |
| 298 | prio_leaf(struct Qdisc *sch, unsigned long arg) |
| 299 | { |
| 300 | struct prio_sched_data *q = qdisc_priv(sch); |
| 301 | unsigned long band = arg - 1; |
| 302 | |
| 303 | if (band >= q->bands) |
| 304 | return NULL; |
| 305 | |
| 306 | return q->queues[band]; |
| 307 | } |
| 308 | |
| 309 | static unsigned long prio_get(struct Qdisc *sch, u32 classid) |
| 310 | { |
| 311 | struct prio_sched_data *q = qdisc_priv(sch); |
| 312 | unsigned long band = TC_H_MIN(classid); |
| 313 | |
| 314 | if (band - 1 >= q->bands) |
| 315 | return 0; |
| 316 | return band; |
| 317 | } |
| 318 | |
| 319 | static unsigned long prio_bind(struct Qdisc *sch, unsigned long parent, u32 classid) |
| 320 | { |
| 321 | return prio_get(sch, classid); |
| 322 | } |
| 323 | |
| 324 | |
| 325 | static void prio_put(struct Qdisc *q, unsigned long cl) |
| 326 | { |
| 327 | return; |
| 328 | } |
| 329 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 330 | static int prio_change(struct Qdisc *sch, u32 handle, u32 parent, struct nlattr **tca, unsigned long *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
| 332 | unsigned long cl = *arg; |
| 333 | struct prio_sched_data *q = qdisc_priv(sch); |
| 334 | |
| 335 | if (cl - 1 > q->bands) |
| 336 | return -ENOENT; |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static int prio_delete(struct Qdisc *sch, unsigned long cl) |
| 341 | { |
| 342 | struct prio_sched_data *q = qdisc_priv(sch); |
| 343 | if (cl - 1 > q->bands) |
| 344 | return -ENOENT; |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | |
| 349 | static int prio_dump_class(struct Qdisc *sch, unsigned long cl, struct sk_buff *skb, |
| 350 | struct tcmsg *tcm) |
| 351 | { |
| 352 | struct prio_sched_data *q = qdisc_priv(sch); |
| 353 | |
| 354 | if (cl - 1 > q->bands) |
| 355 | return -ENOENT; |
| 356 | tcm->tcm_handle |= TC_H_MIN(cl); |
| 357 | if (q->queues[cl-1]) |
| 358 | tcm->tcm_info = q->queues[cl-1]->handle; |
| 359 | return 0; |
| 360 | } |
| 361 | |
Jarek Poplawski | 2cf6c36 | 2007-01-31 12:21:24 -0800 | [diff] [blame] | 362 | static int prio_dump_class_stats(struct Qdisc *sch, unsigned long cl, |
| 363 | struct gnet_dump *d) |
| 364 | { |
| 365 | struct prio_sched_data *q = qdisc_priv(sch); |
| 366 | struct Qdisc *cl_q; |
| 367 | |
| 368 | cl_q = q->queues[cl - 1]; |
| 369 | if (gnet_stats_copy_basic(d, &cl_q->bstats) < 0 || |
| 370 | gnet_stats_copy_queue(d, &cl_q->qstats) < 0) |
| 371 | return -1; |
| 372 | |
| 373 | return 0; |
| 374 | } |
| 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | static void prio_walk(struct Qdisc *sch, struct qdisc_walker *arg) |
| 377 | { |
| 378 | struct prio_sched_data *q = qdisc_priv(sch); |
| 379 | int prio; |
| 380 | |
| 381 | if (arg->stop) |
| 382 | return; |
| 383 | |
| 384 | for (prio = 0; prio < q->bands; prio++) { |
| 385 | if (arg->count < arg->skip) { |
| 386 | arg->count++; |
| 387 | continue; |
| 388 | } |
| 389 | if (arg->fn(sch, prio+1, arg) < 0) { |
| 390 | arg->stop = 1; |
| 391 | break; |
| 392 | } |
| 393 | arg->count++; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | static struct tcf_proto ** prio_find_tcf(struct Qdisc *sch, unsigned long cl) |
| 398 | { |
| 399 | struct prio_sched_data *q = qdisc_priv(sch); |
| 400 | |
| 401 | if (cl) |
| 402 | return NULL; |
| 403 | return &q->filter_list; |
| 404 | } |
| 405 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 406 | static const struct Qdisc_class_ops prio_class_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | .graft = prio_graft, |
| 408 | .leaf = prio_leaf, |
| 409 | .get = prio_get, |
| 410 | .put = prio_put, |
| 411 | .change = prio_change, |
| 412 | .delete = prio_delete, |
| 413 | .walk = prio_walk, |
| 414 | .tcf_chain = prio_find_tcf, |
| 415 | .bind_tcf = prio_bind, |
| 416 | .unbind_tcf = prio_put, |
| 417 | .dump = prio_dump_class, |
Jarek Poplawski | 2cf6c36 | 2007-01-31 12:21:24 -0800 | [diff] [blame] | 418 | .dump_stats = prio_dump_class_stats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | }; |
| 420 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 421 | static struct Qdisc_ops prio_qdisc_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | .next = NULL, |
| 423 | .cl_ops = &prio_class_ops, |
| 424 | .id = "prio", |
| 425 | .priv_size = sizeof(struct prio_sched_data), |
| 426 | .enqueue = prio_enqueue, |
| 427 | .dequeue = prio_dequeue, |
| 428 | .requeue = prio_requeue, |
| 429 | .drop = prio_drop, |
| 430 | .init = prio_init, |
| 431 | .reset = prio_reset, |
| 432 | .destroy = prio_destroy, |
| 433 | .change = prio_tune, |
| 434 | .dump = prio_dump, |
| 435 | .owner = THIS_MODULE, |
| 436 | }; |
| 437 | |
| 438 | static int __init prio_module_init(void) |
| 439 | { |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 440 | return register_qdisc(&prio_qdisc_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
| 442 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 443 | static void __exit prio_module_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | { |
| 445 | unregister_qdisc(&prio_qdisc_ops); |
| 446 | } |
| 447 | |
| 448 | module_init(prio_module_init) |
| 449 | module_exit(prio_module_exit) |
| 450 | |
| 451 | MODULE_LICENSE("GPL"); |