Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * net/sched/sch_prio.c Simple 3-band priority "scheduler". |
| 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 6 | * Fixes: 19990609: J Hadi Salim <hadi@nortelnetworks.com>: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Init -- EINVAL when opt undefined |
| 8 | */ |
| 9 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 11 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/types.h> |
| 13 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/skbuff.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 17 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <net/pkt_sched.h> |
Jiri Pirko | cf1facd | 2017-02-09 14:38:56 +0100 | [diff] [blame] | 19 | #include <net/pkt_cls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 21 | struct prio_sched_data { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | int bands; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 23 | struct tcf_proto __rcu *filter_list; |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 24 | struct tcf_block *block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | u8 prio2band[TC_PRIO_MAX+1]; |
| 26 | struct Qdisc *queues[TCQ_PRIO_BANDS]; |
| 27 | }; |
| 28 | |
| 29 | |
| 30 | static struct Qdisc * |
| 31 | prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) |
| 32 | { |
| 33 | struct prio_sched_data *q = qdisc_priv(sch); |
| 34 | u32 band = skb->priority; |
| 35 | struct tcf_result res; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 36 | struct tcf_proto *fl; |
Patrick McHardy | bdba91e | 2007-07-30 17:07:14 -0700 | [diff] [blame] | 37 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 39 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | if (TC_H_MAJ(skb->priority) != sch->handle) { |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 41 | fl = rcu_dereference_bh(q->filter_list); |
Davide Caratti | 3aa2605 | 2021-07-28 20:08:00 +0200 | [diff] [blame] | 42 | err = tcf_classify(skb, NULL, fl, &res, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #ifdef CONFIG_NET_CLS_ACT |
Lucas Nussbaum | dbaaa07 | 2007-08-30 22:35:46 -0700 | [diff] [blame] | 44 | switch (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | case TC_ACT_STOLEN: |
| 46 | case TC_ACT_QUEUED: |
Jiri Pirko | e25ea21 | 2017-06-06 14:12:02 +0200 | [diff] [blame] | 47 | case TC_ACT_TRAP: |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 48 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
Gustavo A. R. Silva | 964201d | 2020-07-07 12:21:38 -0500 | [diff] [blame] | 49 | fallthrough; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | case TC_ACT_SHOT: |
| 51 | return NULL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 52 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #endif |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 54 | if (!fl || err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | if (TC_H_MAJ(band)) |
| 56 | band = 0; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 57 | return q->queues[q->prio2band[band & TC_PRIO_MAX]]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | band = res.classid; |
| 60 | } |
| 61 | band = TC_H_MIN(band) - 1; |
Jamal Hadi Salim | 3e5c2d3 | 2007-05-14 02:57:19 -0700 | [diff] [blame] | 62 | if (band >= q->bands) |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 63 | return q->queues[q->prio2band[0]]; |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | return q->queues[band]; |
| 66 | } |
| 67 | |
Petr Machata | ac5c66f | 2020-07-14 20:03:08 +0300 | [diff] [blame] | 68 | static int |
| 69 | prio_enqueue(struct sk_buff *skb, struct Qdisc *sch, struct sk_buff **to_free) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
Toke Høiland-Jørgensen | f6bab19 | 2019-01-09 17:09:42 +0100 | [diff] [blame] | 71 | unsigned int len = qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | struct Qdisc *qdisc; |
| 73 | int ret; |
| 74 | |
| 75 | qdisc = prio_classify(skb, sch, &ret); |
| 76 | #ifdef CONFIG_NET_CLS_ACT |
| 77 | if (qdisc == NULL) { |
Jamal Hadi Salim | 29f1df6 | 2006-01-08 22:35:55 -0800 | [diff] [blame] | 78 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 79 | if (ret & __NET_XMIT_BYPASS) |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 80 | qdisc_qstats_drop(sch); |
Gao Feng | 39ad129 | 2017-09-04 14:21:12 +0800 | [diff] [blame] | 81 | __qdisc_drop(skb, to_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | return ret; |
| 83 | } |
| 84 | #endif |
| 85 | |
Petr Machata | ac5c66f | 2020-07-14 20:03:08 +0300 | [diff] [blame] | 86 | ret = qdisc_enqueue(skb, qdisc, to_free); |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 87 | if (ret == NET_XMIT_SUCCESS) { |
Toke Høiland-Jørgensen | f6bab19 | 2019-01-09 17:09:42 +0100 | [diff] [blame] | 88 | sch->qstats.backlog += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | sch->q.qlen++; |
| 90 | return NET_XMIT_SUCCESS; |
| 91 | } |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 92 | if (net_xmit_drop_count(ret)) |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 93 | qdisc_qstats_drop(sch); |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 94 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
Patrick McHardy | 48a8f51 | 2008-10-31 00:44:18 -0700 | [diff] [blame] | 97 | static struct sk_buff *prio_peek(struct Qdisc *sch) |
| 98 | { |
| 99 | struct prio_sched_data *q = qdisc_priv(sch); |
| 100 | int prio; |
| 101 | |
| 102 | for (prio = 0; prio < q->bands; prio++) { |
| 103 | struct Qdisc *qdisc = q->queues[prio]; |
| 104 | struct sk_buff *skb = qdisc->ops->peek(qdisc); |
| 105 | if (skb) |
| 106 | return skb; |
| 107 | } |
| 108 | return NULL; |
| 109 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 111 | static struct sk_buff *prio_dequeue(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | struct prio_sched_data *q = qdisc_priv(sch); |
| 114 | int prio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
| 116 | for (prio = 0; prio < q->bands; prio++) { |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 117 | struct Qdisc *qdisc = q->queues[prio]; |
Florian Westphal | 3557619 | 2011-08-09 02:04:43 +0000 | [diff] [blame] | 118 | struct sk_buff *skb = qdisc_dequeue_peeked(qdisc); |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 119 | if (skb) { |
Eric Dumazet | 9190b3b | 2011-01-20 23:31:33 -0800 | [diff] [blame] | 120 | qdisc_bstats_update(sch, skb); |
WANG Cong | 6529d75 | 2016-06-01 16:15:16 -0700 | [diff] [blame] | 121 | qdisc_qstats_backlog_dec(sch, skb); |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 122 | sch->q.qlen--; |
| 123 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | } |
| 126 | return NULL; |
| 127 | |
| 128 | } |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static void |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 131 | prio_reset(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
| 133 | int prio; |
| 134 | struct prio_sched_data *q = qdisc_priv(sch); |
| 135 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 136 | for (prio = 0; prio < q->bands; prio++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | qdisc_reset(q->queues[prio]); |
WANG Cong | 6529d75 | 2016-06-01 16:15:16 -0700 | [diff] [blame] | 138 | sch->qstats.backlog = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | sch->q.qlen = 0; |
| 140 | } |
| 141 | |
Nogah Frankel | 98ceb7b | 2018-02-28 10:45:05 +0100 | [diff] [blame] | 142 | static int prio_offload(struct Qdisc *sch, struct tc_prio_qopt *qopt) |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 143 | { |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 144 | struct net_device *dev = qdisc_dev(sch); |
| 145 | struct tc_prio_qopt_offload opt = { |
| 146 | .handle = sch->handle, |
| 147 | .parent = sch->parent, |
| 148 | }; |
| 149 | |
| 150 | if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc) |
| 151 | return -EOPNOTSUPP; |
| 152 | |
Nogah Frankel | 98ceb7b | 2018-02-28 10:45:05 +0100 | [diff] [blame] | 153 | if (qopt) { |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 154 | opt.command = TC_PRIO_REPLACE; |
Nogah Frankel | 98ceb7b | 2018-02-28 10:45:05 +0100 | [diff] [blame] | 155 | opt.replace_params.bands = qopt->bands; |
| 156 | memcpy(&opt.replace_params.priomap, qopt->priomap, |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 157 | TC_PRIO_MAX + 1); |
| 158 | opt.replace_params.qstats = &sch->qstats; |
| 159 | } else { |
| 160 | opt.command = TC_PRIO_DESTROY; |
| 161 | } |
| 162 | |
| 163 | return dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_PRIO, &opt); |
| 164 | } |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | static void |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 167 | prio_destroy(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | { |
| 169 | int prio; |
| 170 | struct prio_sched_data *q = qdisc_priv(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 172 | tcf_block_put(q->block); |
Nogah Frankel | 98ceb7b | 2018-02-28 10:45:05 +0100 | [diff] [blame] | 173 | prio_offload(sch, NULL); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 174 | for (prio = 0; prio < q->bands; prio++) |
Vlad Buslov | 86bd446 | 2018-09-24 19:22:50 +0300 | [diff] [blame] | 175 | qdisc_put(q->queues[prio]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
| 177 | |
Alexander Aring | 2030721 | 2017-12-20 12:35:14 -0500 | [diff] [blame] | 178 | static int prio_tune(struct Qdisc *sch, struct nlattr *opt, |
| 179 | struct netlink_ext_ack *extack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | { |
| 181 | struct prio_sched_data *q = qdisc_priv(sch); |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 182 | struct Qdisc *queues[TCQ_PRIO_BANDS]; |
| 183 | int oldbands = q->bands, i; |
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 | |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 186 | if (nla_len(opt) < sizeof(*qopt)) |
| 187 | return -EINVAL; |
| 188 | qopt = nla_data(opt); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 189 | |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 190 | if (qopt->bands > TCQ_PRIO_BANDS || qopt->bands < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | return -EINVAL; |
| 192 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 193 | for (i = 0; i <= TC_PRIO_MAX; i++) { |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 194 | if (qopt->priomap[i] >= qopt->bands) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | return -EINVAL; |
| 196 | } |
| 197 | |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 198 | /* Before commit, make sure we can allocate all new qdiscs */ |
| 199 | for (i = oldbands; i < qopt->bands; i++) { |
| 200 | queues[i] = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, |
Alexander Aring | a38a9882 | 2017-12-20 12:35:21 -0500 | [diff] [blame] | 201 | TC_H_MAKE(sch->handle, i + 1), |
| 202 | extack); |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 203 | if (!queues[i]) { |
| 204 | while (i > oldbands) |
Vlad Buslov | 86bd446 | 2018-09-24 19:22:50 +0300 | [diff] [blame] | 205 | qdisc_put(queues[--i]); |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 206 | return -ENOMEM; |
| 207 | } |
| 208 | } |
| 209 | |
Nogah Frankel | 98ceb7b | 2018-02-28 10:45:05 +0100 | [diff] [blame] | 210 | prio_offload(sch, qopt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | sch_tree_lock(sch); |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 212 | q->bands = qopt->bands; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | memcpy(q->prio2band, qopt->priomap, TC_PRIO_MAX+1); |
| 214 | |
Paolo Abeni | e5f0e8f | 2019-03-28 16:53:13 +0100 | [diff] [blame] | 215 | for (i = q->bands; i < oldbands; i++) |
| 216 | qdisc_tree_flush_backlog(q->queues[i]); |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 217 | |
Jiri Kosina | 49b4997 | 2017-03-08 16:03:32 +0100 | [diff] [blame] | 218 | for (i = oldbands; i < q->bands; i++) { |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 219 | q->queues[i] = queues[i]; |
Jiri Kosina | 49b4997 | 2017-03-08 16:03:32 +0100 | [diff] [blame] | 220 | if (q->queues[i] != &noop_qdisc) |
| 221 | qdisc_hash_add(q->queues[i], true); |
| 222 | } |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | sch_tree_unlock(sch); |
Jakub Kicinski | 7b8e0b6 | 2018-11-07 17:33:40 -0800 | [diff] [blame] | 225 | |
| 226 | for (i = q->bands; i < oldbands; i++) |
| 227 | qdisc_put(q->queues[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | return 0; |
| 229 | } |
| 230 | |
Alexander Aring | e63d7dfd | 2017-12-20 12:35:13 -0500 | [diff] [blame] | 231 | static int prio_init(struct Qdisc *sch, struct nlattr *opt, |
| 232 | struct netlink_ext_ack *extack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 234 | struct prio_sched_data *q = qdisc_priv(sch); |
| 235 | int err; |
| 236 | |
Eric Dumazet | 3d7c825 | 2016-06-13 11:33:32 -0700 | [diff] [blame] | 237 | if (!opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Alexander Aring | 8d1a77f | 2017-12-20 12:35:19 -0500 | [diff] [blame] | 240 | err = tcf_block_get(&q->block, &q->filter_list, sch, extack); |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 241 | if (err) |
| 242 | return err; |
| 243 | |
Alexander Aring | 2030721 | 2017-12-20 12:35:14 -0500 | [diff] [blame] | 244 | return prio_tune(sch, opt, extack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 247 | static int prio_dump_offload(struct Qdisc *sch) |
| 248 | { |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 249 | struct tc_prio_qopt_offload hw_stats = { |
Andrew Morton | ef58ca3 | 2018-01-18 16:30:49 -0800 | [diff] [blame] | 250 | .command = TC_PRIO_STATS, |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 251 | .handle = sch->handle, |
| 252 | .parent = sch->parent, |
Andrew Morton | ef58ca3 | 2018-01-18 16:30:49 -0800 | [diff] [blame] | 253 | { |
| 254 | .stats = { |
| 255 | .bstats = &sch->bstats, |
| 256 | .qstats = &sch->qstats, |
| 257 | }, |
| 258 | }, |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 259 | }; |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 260 | |
Jakub Kicinski | b592843 | 2018-11-07 17:33:34 -0800 | [diff] [blame] | 261 | return qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_PRIO, &hw_stats); |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 262 | } |
| 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | static int prio_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 265 | { |
| 266 | struct prio_sched_data *q = qdisc_priv(sch); |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 267 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | struct tc_prio_qopt opt; |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 269 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | opt.bands = q->bands; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 272 | memcpy(&opt.priomap, q->prio2band, TC_PRIO_MAX + 1); |
Peter P Waskiewicz Jr | d62733c | 2007-06-28 21:04:31 -0700 | [diff] [blame] | 273 | |
Nogah Frankel | 7fdb61b | 2018-01-14 12:33:15 +0100 | [diff] [blame] | 274 | err = prio_dump_offload(sch); |
| 275 | if (err) |
| 276 | goto nla_put_failure; |
| 277 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 278 | if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt)) |
| 279 | goto nla_put_failure; |
Peter P Waskiewicz Jr | d62733c | 2007-06-28 21:04:31 -0700 | [diff] [blame] | 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | return skb->len; |
| 282 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 283 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 284 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | return -1; |
| 286 | } |
| 287 | |
| 288 | static int prio_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, |
Alexander Aring | 653d6fd | 2017-12-20 12:35:17 -0500 | [diff] [blame] | 289 | struct Qdisc **old, struct netlink_ext_ack *extack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
| 291 | struct prio_sched_data *q = qdisc_priv(sch); |
Nogah Frankel | b9c7a7a | 2018-02-28 10:45:06 +0100 | [diff] [blame] | 292 | struct tc_prio_qopt_offload graft_offload; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | unsigned long band = arg - 1; |
| 294 | |
Petr Machata | 240ce7f | 2020-01-06 18:01:56 +0000 | [diff] [blame] | 295 | if (!new) { |
| 296 | new = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, |
| 297 | TC_H_MAKE(sch->handle, arg), extack); |
| 298 | if (!new) |
| 299 | new = &noop_qdisc; |
| 300 | else |
| 301 | qdisc_hash_add(new, true); |
| 302 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
WANG Cong | 86a7996 | 2016-02-25 14:55:00 -0800 | [diff] [blame] | 304 | *old = qdisc_replace(sch, new, &q->queues[band]); |
Nogah Frankel | b9c7a7a | 2018-02-28 10:45:06 +0100 | [diff] [blame] | 305 | |
Nogah Frankel | b9c7a7a | 2018-02-28 10:45:06 +0100 | [diff] [blame] | 306 | graft_offload.handle = sch->handle; |
| 307 | graft_offload.parent = sch->parent; |
| 308 | graft_offload.graft_params.band = band; |
| 309 | graft_offload.graft_params.child_handle = new->handle; |
| 310 | graft_offload.command = TC_PRIO_GRAFT; |
| 311 | |
Jakub Kicinski | bfaee91 | 2018-11-07 17:33:37 -0800 | [diff] [blame] | 312 | qdisc_offload_graft_helper(qdisc_dev(sch), sch, new, *old, |
| 313 | TC_SETUP_QDISC_PRIO, &graft_offload, |
| 314 | extack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | static struct Qdisc * |
| 319 | prio_leaf(struct Qdisc *sch, unsigned long arg) |
| 320 | { |
| 321 | struct prio_sched_data *q = qdisc_priv(sch); |
| 322 | unsigned long band = arg - 1; |
| 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | return q->queues[band]; |
| 325 | } |
| 326 | |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 327 | static unsigned long prio_find(struct Qdisc *sch, u32 classid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
| 329 | struct prio_sched_data *q = qdisc_priv(sch); |
| 330 | unsigned long band = TC_H_MIN(classid); |
| 331 | |
| 332 | if (band - 1 >= q->bands) |
| 333 | return 0; |
| 334 | return band; |
| 335 | } |
| 336 | |
| 337 | static unsigned long prio_bind(struct Qdisc *sch, unsigned long parent, u32 classid) |
| 338 | { |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 339 | return prio_find(sch, classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 343 | static void prio_unbind(struct Qdisc *q, unsigned long cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | static int prio_dump_class(struct Qdisc *sch, unsigned long cl, struct sk_buff *skb, |
| 348 | struct tcmsg *tcm) |
| 349 | { |
| 350 | struct prio_sched_data *q = qdisc_priv(sch); |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | tcm->tcm_handle |= TC_H_MIN(cl); |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 353 | tcm->tcm_info = q->queues[cl-1]->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | return 0; |
| 355 | } |
| 356 | |
Jarek Poplawski | 2cf6c36 | 2007-01-31 12:21:24 -0800 | [diff] [blame] | 357 | static int prio_dump_class_stats(struct Qdisc *sch, unsigned long cl, |
| 358 | struct gnet_dump *d) |
| 359 | { |
| 360 | struct prio_sched_data *q = qdisc_priv(sch); |
| 361 | struct Qdisc *cl_q; |
| 362 | |
| 363 | cl_q = q->queues[cl - 1]; |
Ahmed S. Darwish | 29cbcd8 | 2021-10-16 10:49:10 +0200 | [diff] [blame] | 364 | if (gnet_stats_copy_basic(d, cl_q->cpu_bstats, |
| 365 | &cl_q->bstats, true) < 0 || |
Paolo Abeni | 5dd431b | 2019-03-28 16:53:12 +0100 | [diff] [blame] | 366 | qdisc_qstats_copy(d, cl_q) < 0) |
Jarek Poplawski | 2cf6c36 | 2007-01-31 12:21:24 -0800 | [diff] [blame] | 367 | return -1; |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | static void prio_walk(struct Qdisc *sch, struct qdisc_walker *arg) |
| 373 | { |
| 374 | struct prio_sched_data *q = qdisc_priv(sch); |
| 375 | int prio; |
| 376 | |
| 377 | if (arg->stop) |
| 378 | return; |
| 379 | |
| 380 | for (prio = 0; prio < q->bands; prio++) { |
| 381 | if (arg->count < arg->skip) { |
| 382 | arg->count++; |
| 383 | continue; |
| 384 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 385 | if (arg->fn(sch, prio + 1, arg) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | arg->stop = 1; |
| 387 | break; |
| 388 | } |
| 389 | arg->count++; |
| 390 | } |
| 391 | } |
| 392 | |
Alexander Aring | cbaacc4 | 2017-12-20 12:35:16 -0500 | [diff] [blame] | 393 | static struct tcf_block *prio_tcf_block(struct Qdisc *sch, unsigned long cl, |
| 394 | struct netlink_ext_ack *extack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
| 396 | struct prio_sched_data *q = qdisc_priv(sch); |
| 397 | |
| 398 | if (cl) |
| 399 | return NULL; |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 400 | return q->block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 403 | static const struct Qdisc_class_ops prio_class_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | .graft = prio_graft, |
| 405 | .leaf = prio_leaf, |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 406 | .find = prio_find, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | .walk = prio_walk, |
Jiri Pirko | 6529eab | 2017-05-17 11:07:55 +0200 | [diff] [blame] | 408 | .tcf_block = prio_tcf_block, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | .bind_tcf = prio_bind, |
WANG Cong | 143976c | 2017-08-24 16:51:29 -0700 | [diff] [blame] | 410 | .unbind_tcf = prio_unbind, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | .dump = prio_dump_class, |
Jarek Poplawski | 2cf6c36 | 2007-01-31 12:21:24 -0800 | [diff] [blame] | 412 | .dump_stats = prio_dump_class_stats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | }; |
| 414 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 415 | static struct Qdisc_ops prio_qdisc_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | .next = NULL, |
| 417 | .cl_ops = &prio_class_ops, |
| 418 | .id = "prio", |
| 419 | .priv_size = sizeof(struct prio_sched_data), |
| 420 | .enqueue = prio_enqueue, |
| 421 | .dequeue = prio_dequeue, |
Patrick McHardy | 48a8f51 | 2008-10-31 00:44:18 -0700 | [diff] [blame] | 422 | .peek = prio_peek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | .init = prio_init, |
| 424 | .reset = prio_reset, |
| 425 | .destroy = prio_destroy, |
| 426 | .change = prio_tune, |
| 427 | .dump = prio_dump, |
| 428 | .owner = THIS_MODULE, |
| 429 | }; |
| 430 | |
| 431 | static int __init prio_module_init(void) |
| 432 | { |
David S. Miller | 1d8ae3f | 2008-07-15 02:52:19 -0700 | [diff] [blame] | 433 | return register_qdisc(&prio_qdisc_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
| 435 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 436 | static void __exit prio_module_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
| 438 | unregister_qdisc(&prio_qdisc_ops); |
| 439 | } |
| 440 | |
| 441 | module_init(prio_module_init) |
| 442 | module_exit(prio_module_exit) |
| 443 | |
| 444 | MODULE_LICENSE("GPL"); |