Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __NET_SCHED_GENERIC_H |
| 2 | #define __NET_SCHED_GENERIC_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/netdevice.h> |
| 5 | #include <linux/types.h> |
| 6 | #include <linux/rcupdate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/pkt_sched.h> |
| 8 | #include <linux/pkt_cls.h> |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 9 | #include <linux/percpu.h> |
Jesper Dangaard Brouer | 5772e9a | 2014-10-01 22:35:59 +0200 | [diff] [blame] | 10 | #include <linux/dynamic_queue_limits.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <net/gen_stats.h> |
Thomas Graf | be577dd | 2007-03-22 11:55:50 -0700 | [diff] [blame] | 12 | #include <net/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | struct Qdisc_ops; |
| 15 | struct qdisc_walker; |
| 16 | struct tcf_walker; |
| 17 | struct module; |
| 18 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 19 | struct qdisc_rate_table { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | struct tc_ratespec rate; |
| 21 | u32 data[256]; |
| 22 | struct qdisc_rate_table *next; |
| 23 | int refcnt; |
| 24 | }; |
| 25 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 26 | enum qdisc_state_t { |
David S. Miller | 37437bb | 2008-07-16 02:15:04 -0700 | [diff] [blame] | 27 | __QDISC_STATE_SCHED, |
David S. Miller | a9312ae | 2008-08-17 21:51:03 -0700 | [diff] [blame] | 28 | __QDISC_STATE_DEACTIVATED, |
Eric Dumazet | ef352e7 | 2011-03-24 00:13:14 -0700 | [diff] [blame] | 29 | __QDISC_STATE_THROTTLED, |
David S. Miller | e2627c8 | 2008-07-16 00:56:32 -0700 | [diff] [blame] | 30 | }; |
| 31 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 32 | struct qdisc_size_table { |
Eric Dumazet | a2da570 | 2011-01-20 03:48:19 +0000 | [diff] [blame] | 33 | struct rcu_head rcu; |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 34 | struct list_head list; |
| 35 | struct tc_sizespec szopts; |
| 36 | int refcnt; |
| 37 | u16 data[]; |
| 38 | }; |
| 39 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 40 | struct Qdisc { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); |
| 42 | struct sk_buff * (*dequeue)(struct Qdisc *dev); |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 43 | unsigned int flags; |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 44 | #define TCQ_F_BUILTIN 1 |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 45 | #define TCQ_F_INGRESS 2 |
| 46 | #define TCQ_F_CAN_BYPASS 4 |
| 47 | #define TCQ_F_MQROOT 8 |
Eric Dumazet | 1abbe13 | 2012-12-11 15:54:33 +0000 | [diff] [blame] | 48 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
| 49 | * q->dev_queue : It can test |
| 50 | * netif_xmit_frozen_or_stopped() before |
| 51 | * dequeueing next packet. |
| 52 | * Its true for MQ/MQPRIO slaves, or non |
| 53 | * multiqueue device. |
| 54 | */ |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 55 | #define TCQ_F_WARN_NONWC (1 << 16) |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 56 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
Eric Dumazet | 4eaf3b8 | 2015-12-01 20:08:51 -0800 | [diff] [blame] | 57 | #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : |
| 58 | * qdisc_tree_decrease_qlen() should stop. |
| 59 | */ |
Eric Dumazet | 45203a3 | 2013-06-06 08:43:22 -0700 | [diff] [blame] | 60 | u32 limit; |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 61 | const struct Qdisc_ops *ops; |
Eric Dumazet | a2da570 | 2011-01-20 03:48:19 +0000 | [diff] [blame] | 62 | struct qdisc_size_table __rcu *stab; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 63 | struct list_head list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | u32 handle; |
| 65 | u32 parent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | int (*reshape_fail)(struct sk_buff *skb, |
| 67 | struct Qdisc *q); |
| 68 | |
David S. Miller | 72b25a9 | 2008-07-18 20:54:17 -0700 | [diff] [blame] | 69 | void *u32_node; |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* This field is deprecated, but it is still used by CBQ |
| 72 | * and it will live until better solution will be invented. |
| 73 | */ |
| 74 | struct Qdisc *__parent; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 75 | struct netdev_queue *dev_queue; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 76 | |
Eric Dumazet | 45203a3 | 2013-06-06 08:43:22 -0700 | [diff] [blame] | 77 | struct gnet_stats_rate_est64 rate_est; |
Eric Dumazet | 0d32ef8 | 2015-01-29 17:30:12 -0800 | [diff] [blame] | 78 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
| 79 | struct gnet_stats_queue __percpu *cpu_qstats; |
| 80 | |
Eric Dumazet | 45203a3 | 2013-06-06 08:43:22 -0700 | [diff] [blame] | 81 | struct Qdisc *next_sched; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 82 | struct sk_buff *gso_skb; |
| 83 | /* |
| 84 | * For performance sake on SMP, we put highly modified fields at the end |
| 85 | */ |
| 86 | unsigned long state; |
| 87 | struct sk_buff_head q; |
Eric Dumazet | 0d32ef8 | 2015-01-29 17:30:12 -0800 | [diff] [blame] | 88 | struct gnet_stats_basic_packed bstats; |
Eric Dumazet | f9eb8ae | 2016-06-06 09:37:15 -0700 | [diff] [blame] | 89 | seqcount_t running; |
Eric Dumazet | 0d32ef8 | 2015-01-29 17:30:12 -0800 | [diff] [blame] | 90 | struct gnet_stats_queue qstats; |
Eric Dumazet | 79640a4 | 2010-06-02 05:09:29 -0700 | [diff] [blame] | 91 | struct rcu_head rcu_head; |
Eric Dumazet | 45203a3 | 2013-06-06 08:43:22 -0700 | [diff] [blame] | 92 | int padded; |
| 93 | atomic_t refcnt; |
| 94 | |
| 95 | spinlock_t busylock ____cacheline_aligned_in_smp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | }; |
| 97 | |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 98 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
Eric Dumazet | bc135b2 | 2010-06-02 03:23:51 -0700 | [diff] [blame] | 99 | { |
Eric Dumazet | f9eb8ae | 2016-06-06 09:37:15 -0700 | [diff] [blame] | 100 | return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; |
Eric Dumazet | bc135b2 | 2010-06-02 03:23:51 -0700 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) |
| 104 | { |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 105 | if (qdisc_is_running(qdisc)) |
| 106 | return false; |
Eric Dumazet | f9eb8ae | 2016-06-06 09:37:15 -0700 | [diff] [blame] | 107 | write_seqcount_begin(&qdisc->running); |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 108 | return true; |
Eric Dumazet | bc135b2 | 2010-06-02 03:23:51 -0700 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | static inline void qdisc_run_end(struct Qdisc *qdisc) |
| 112 | { |
Eric Dumazet | f9eb8ae | 2016-06-06 09:37:15 -0700 | [diff] [blame] | 113 | write_seqcount_end(&qdisc->running); |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 114 | } |
| 115 | |
Jesper Dangaard Brouer | 5772e9a | 2014-10-01 22:35:59 +0200 | [diff] [blame] | 116 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
| 117 | { |
| 118 | return qdisc->flags & TCQ_F_ONETXQUEUE; |
| 119 | } |
| 120 | |
| 121 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) |
| 122 | { |
| 123 | #ifdef CONFIG_BQL |
| 124 | /* Non-BQL migrated drivers will return 0, too. */ |
| 125 | return dql_avail(&txq->dql); |
| 126 | #else |
| 127 | return 0; |
| 128 | #endif |
| 129 | } |
| 130 | |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 131 | static inline bool qdisc_is_throttled(const struct Qdisc *qdisc) |
| 132 | { |
Eric Dumazet | ef352e7 | 2011-03-24 00:13:14 -0700 | [diff] [blame] | 133 | return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false; |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | static inline void qdisc_throttled(struct Qdisc *qdisc) |
| 137 | { |
Eric Dumazet | ef352e7 | 2011-03-24 00:13:14 -0700 | [diff] [blame] | 138 | set_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | static inline void qdisc_unthrottled(struct Qdisc *qdisc) |
| 142 | { |
Eric Dumazet | ef352e7 | 2011-03-24 00:13:14 -0700 | [diff] [blame] | 143 | clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
Eric Dumazet | bc135b2 | 2010-06-02 03:23:51 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 146 | struct Qdisc_class_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | /* Child qdisc manipulation */ |
Jarek Poplawski | 926e61b | 2009-09-15 02:53:07 -0700 | [diff] [blame] | 148 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | int (*graft)(struct Qdisc *, unsigned long cl, |
| 150 | struct Qdisc *, struct Qdisc **); |
| 151 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 152 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | /* Class manipulation routines */ |
| 155 | unsigned long (*get)(struct Qdisc *, u32 classid); |
| 156 | void (*put)(struct Qdisc *, unsigned long); |
| 157 | int (*change)(struct Qdisc *, u32, u32, |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 158 | struct nlattr **, unsigned long *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | int (*delete)(struct Qdisc *, unsigned long); |
| 160 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); |
| 161 | |
| 162 | /* Filter manipulation */ |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 163 | struct tcf_proto __rcu ** (*tcf_chain)(struct Qdisc *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
| 165 | u32 classid); |
| 166 | void (*unbind_tcf)(struct Qdisc *, unsigned long); |
| 167 | |
| 168 | /* rtnetlink specific */ |
| 169 | int (*dump)(struct Qdisc *, unsigned long, |
| 170 | struct sk_buff *skb, struct tcmsg*); |
| 171 | int (*dump_stats)(struct Qdisc *, unsigned long, |
| 172 | struct gnet_dump *); |
| 173 | }; |
| 174 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 175 | struct Qdisc_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | struct Qdisc_ops *next; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 177 | const struct Qdisc_class_ops *cl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | char id[IFNAMSIZ]; |
| 179 | int priv_size; |
| 180 | |
| 181 | int (*enqueue)(struct sk_buff *, struct Qdisc *); |
| 182 | struct sk_buff * (*dequeue)(struct Qdisc *); |
Jarek Poplawski | 90d841fd | 2008-10-31 00:43:45 -0700 | [diff] [blame] | 183 | struct sk_buff * (*peek)(struct Qdisc *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | unsigned int (*drop)(struct Qdisc *); |
| 185 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 186 | int (*init)(struct Qdisc *, struct nlattr *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | void (*reset)(struct Qdisc *); |
| 188 | void (*destroy)(struct Qdisc *); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 189 | int (*change)(struct Qdisc *, struct nlattr *arg); |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 190 | void (*attach)(struct Qdisc *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | int (*dump)(struct Qdisc *, struct sk_buff *); |
| 193 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); |
| 194 | |
| 195 | struct module *owner; |
| 196 | }; |
| 197 | |
| 198 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 199 | struct tcf_result { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | unsigned long class; |
| 201 | u32 classid; |
| 202 | }; |
| 203 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 204 | struct tcf_proto_ops { |
WANG Cong | 3627287 | 2013-12-15 20:15:11 -0800 | [diff] [blame] | 205 | struct list_head head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | char kind[IFNAMSIZ]; |
| 207 | |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 208 | int (*classify)(struct sk_buff *, |
| 209 | const struct tcf_proto *, |
| 210 | struct tcf_result *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | int (*init)(struct tcf_proto*); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 212 | bool (*destroy)(struct tcf_proto*, bool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | unsigned long (*get)(struct tcf_proto*, u32 handle); |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 215 | int (*change)(struct net *net, struct sk_buff *, |
Eric W. Biederman | af4c664 | 2012-05-25 13:42:45 -0600 | [diff] [blame] | 216 | struct tcf_proto*, unsigned long, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 217 | u32 handle, struct nlattr **, |
Cong Wang | 2f7ef2f | 2014-04-25 13:54:06 -0700 | [diff] [blame] | 218 | unsigned long *, bool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | int (*delete)(struct tcf_proto*, unsigned long); |
| 220 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); |
| 221 | |
| 222 | /* rtnetlink specific */ |
WANG Cong | 832d1d5 | 2014-01-09 16:14:01 -0800 | [diff] [blame] | 223 | int (*dump)(struct net*, struct tcf_proto*, unsigned long, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | struct sk_buff *skb, struct tcmsg*); |
| 225 | |
| 226 | struct module *owner; |
| 227 | }; |
| 228 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 229 | struct tcf_proto { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | /* Fast access part */ |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 231 | struct tcf_proto __rcu *next; |
| 232 | void __rcu *root; |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 233 | int (*classify)(struct sk_buff *, |
| 234 | const struct tcf_proto *, |
| 235 | struct tcf_result *); |
Al Viro | 66c6f52 | 2006-11-20 18:07:51 -0800 | [diff] [blame] | 236 | __be16 protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
| 238 | /* All the rest */ |
| 239 | u32 prio; |
| 240 | u32 classid; |
| 241 | struct Qdisc *q; |
| 242 | void *data; |
Eric Dumazet | dc7f9f6 | 2011-07-05 23:25:42 +0000 | [diff] [blame] | 243 | const struct tcf_proto_ops *ops; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 244 | struct rcu_head rcu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | }; |
| 246 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 247 | struct qdisc_skb_cb { |
| 248 | unsigned int pkt_len; |
Jiri Pirko | df4ab5b | 2012-07-20 02:28:49 +0000 | [diff] [blame] | 249 | u16 slave_dev_queue_mapping; |
Daniel Borkmann | 045efa8 | 2015-09-15 23:05:42 -0700 | [diff] [blame] | 250 | u16 tc_classid; |
Eric Dumazet | 2571178 | 2014-09-18 08:02:05 -0700 | [diff] [blame] | 251 | #define QDISC_CB_PRIV_LEN 20 |
| 252 | unsigned char data[QDISC_CB_PRIV_LEN]; |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 253 | }; |
| 254 | |
David S. Miller | 16bda13 | 2012-02-06 15:14:37 -0500 | [diff] [blame] | 255 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
| 256 | { |
| 257 | struct qdisc_skb_cb *qcb; |
Eric Dumazet | 5ee31c68 | 2012-06-12 06:03:51 +0000 | [diff] [blame] | 258 | |
| 259 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); |
David S. Miller | 16bda13 | 2012-02-06 15:14:37 -0500 | [diff] [blame] | 260 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
| 261 | } |
| 262 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 263 | static inline int qdisc_qlen(const struct Qdisc *q) |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 264 | { |
| 265 | return q->q.qlen; |
| 266 | } |
| 267 | |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 268 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 269 | { |
| 270 | return (struct qdisc_skb_cb *)skb->cb; |
| 271 | } |
| 272 | |
David S. Miller | 8387400 | 2008-07-17 00:53:03 -0700 | [diff] [blame] | 273 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
| 274 | { |
| 275 | return &qdisc->q.lock; |
| 276 | } |
| 277 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 278 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 279 | { |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 280 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
| 281 | |
| 282 | return q; |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 285 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
Jarek Poplawski | 2540e05 | 2008-08-21 05:11:14 -0700 | [diff] [blame] | 286 | { |
| 287 | return qdisc->dev_queue->qdisc_sleeping; |
| 288 | } |
| 289 | |
David S. Miller | 7e43f11 | 2008-08-02 23:27:37 -0700 | [diff] [blame] | 290 | /* The qdisc root lock is a mechanism by which to top level |
| 291 | * of a qdisc tree can be locked from any qdisc node in the |
| 292 | * forest. This allows changing the configuration of some |
| 293 | * aspect of the qdisc tree while blocking out asynchronous |
| 294 | * qdisc access in the packet processing paths. |
| 295 | * |
| 296 | * It is only legal to do this when the root will not change |
| 297 | * on us. Otherwise we'll potentially lock the wrong qdisc |
| 298 | * root. This is enforced by holding the RTNL semaphore, which |
| 299 | * all users of this lock accessor must do. |
| 300 | */ |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 301 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 302 | { |
| 303 | struct Qdisc *root = qdisc_root(qdisc); |
| 304 | |
David S. Miller | 7e43f11 | 2008-08-02 23:27:37 -0700 | [diff] [blame] | 305 | ASSERT_RTNL(); |
David S. Miller | 8387400 | 2008-07-17 00:53:03 -0700 | [diff] [blame] | 306 | return qdisc_lock(root); |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 309 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
Jarek Poplawski | f6f9b93 | 2008-08-27 02:25:17 -0700 | [diff] [blame] | 310 | { |
| 311 | struct Qdisc *root = qdisc_root_sleeping(qdisc); |
| 312 | |
| 313 | ASSERT_RTNL(); |
| 314 | return qdisc_lock(root); |
| 315 | } |
| 316 | |
Eric Dumazet | edb09eb | 2016-06-06 09:37:16 -0700 | [diff] [blame^] | 317 | static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) |
| 318 | { |
| 319 | struct Qdisc *root = qdisc_root_sleeping(qdisc); |
| 320 | |
| 321 | ASSERT_RTNL(); |
| 322 | return &root->running; |
| 323 | } |
| 324 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 325 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 326 | { |
| 327 | return qdisc->dev_queue->dev; |
| 328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 330 | static inline void sch_tree_lock(const struct Qdisc *q) |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 331 | { |
Jarek Poplawski | fe439dd | 2008-08-27 02:27:10 -0700 | [diff] [blame] | 332 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 335 | static inline void sch_tree_unlock(const struct Qdisc *q) |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 336 | { |
Jarek Poplawski | fe439dd | 2008-08-27 02:27:10 -0700 | [diff] [blame] | 337 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) |
| 341 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 343 | extern struct Qdisc noop_qdisc; |
| 344 | extern struct Qdisc_ops noop_qdisc_ops; |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 345 | extern struct Qdisc_ops pfifo_fast_ops; |
| 346 | extern struct Qdisc_ops mq_qdisc_ops; |
Phil Sutter | d66d6c3 | 2015-08-27 21:21:38 +0200 | [diff] [blame] | 347 | extern struct Qdisc_ops noqueue_qdisc_ops; |
stephen hemminger | 6da7c8f | 2013-08-27 16:19:08 -0700 | [diff] [blame] | 348 | extern const struct Qdisc_ops *default_qdisc_ops; |
Eric Dumazet | 1f27cde | 2016-03-02 08:21:43 -0800 | [diff] [blame] | 349 | static inline const struct Qdisc_ops * |
| 350 | get_default_qdisc_ops(const struct net_device *dev, int ntx) |
| 351 | { |
| 352 | return ntx < dev->real_num_tx_queues ? |
| 353 | default_qdisc_ops : &pfifo_fast_ops; |
| 354 | } |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 355 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 356 | struct Qdisc_class_common { |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 357 | u32 classid; |
| 358 | struct hlist_node hnode; |
| 359 | }; |
| 360 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 361 | struct Qdisc_class_hash { |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 362 | struct hlist_head *hash; |
| 363 | unsigned int hashsize; |
| 364 | unsigned int hashmask; |
| 365 | unsigned int hashelems; |
| 366 | }; |
| 367 | |
| 368 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) |
| 369 | { |
| 370 | id ^= id >> 8; |
| 371 | id ^= id >> 4; |
| 372 | return id & mask; |
| 373 | } |
| 374 | |
| 375 | static inline struct Qdisc_class_common * |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 376 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 377 | { |
| 378 | struct Qdisc_class_common *cl; |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 379 | unsigned int h; |
| 380 | |
| 381 | h = qdisc_class_hash(id, hash->hashmask); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 382 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 383 | if (cl->classid == id) |
| 384 | return cl; |
| 385 | } |
| 386 | return NULL; |
| 387 | } |
| 388 | |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 389 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
| 390 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, |
| 391 | struct Qdisc_class_common *); |
| 392 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, |
| 393 | struct Qdisc_class_common *); |
| 394 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); |
| 395 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 396 | |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 397 | void dev_init_scheduler(struct net_device *dev); |
| 398 | void dev_shutdown(struct net_device *dev); |
| 399 | void dev_activate(struct net_device *dev); |
| 400 | void dev_deactivate(struct net_device *dev); |
| 401 | void dev_deactivate_many(struct list_head *head); |
| 402 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, |
| 403 | struct Qdisc *qdisc); |
| 404 | void qdisc_reset(struct Qdisc *qdisc); |
| 405 | void qdisc_destroy(struct Qdisc *qdisc); |
WANG Cong | 2ccccf5 | 2016-02-25 14:55:01 -0800 | [diff] [blame] | 406 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n, |
| 407 | unsigned int len); |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 408 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
stephen hemminger | d2a7f26 | 2013-08-31 10:15:50 -0700 | [diff] [blame] | 409 | const struct Qdisc_ops *ops); |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 410 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
stephen hemminger | d2a7f26 | 2013-08-31 10:15:50 -0700 | [diff] [blame] | 411 | const struct Qdisc_ops *ops, u32 parentid); |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 412 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
| 413 | const struct qdisc_size_table *stab); |
Cong Wang | 1e052be | 2015-03-06 11:47:59 -0800 | [diff] [blame] | 414 | bool tcf_destroy(struct tcf_proto *tp, bool force); |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 415 | void tcf_destroy_chain(struct tcf_proto __rcu **fl); |
Alexei Starovoitov | 27b29f6 | 2015-09-15 23:05:43 -0700 | [diff] [blame] | 416 | int skb_do_redirect(struct sk_buff *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Daniel Borkmann | fdc5432 | 2016-01-07 15:50:22 +0100 | [diff] [blame] | 418 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
| 419 | { |
| 420 | #ifdef CONFIG_NET_CLS_ACT |
| 421 | return G_TC_AT(skb->tc_verd) & AT_INGRESS; |
| 422 | #else |
| 423 | return false; |
| 424 | #endif |
| 425 | } |
| 426 | |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 427 | /* Reset all TX qdiscs greater then index of a device. */ |
| 428 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) |
David S. Miller | 5aa7099 | 2008-07-08 22:59:10 -0700 | [diff] [blame] | 429 | { |
John Fastabend | 4ef6acf | 2010-07-01 13:21:35 +0000 | [diff] [blame] | 430 | struct Qdisc *qdisc; |
| 431 | |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 432 | for (; i < dev->num_tx_queues; i++) { |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 433 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
John Fastabend | 4ef6acf | 2010-07-01 13:21:35 +0000 | [diff] [blame] | 434 | if (qdisc) { |
| 435 | spin_lock_bh(qdisc_lock(qdisc)); |
| 436 | qdisc_reset(qdisc); |
| 437 | spin_unlock_bh(qdisc_lock(qdisc)); |
| 438 | } |
| 439 | } |
David S. Miller | 5aa7099 | 2008-07-08 22:59:10 -0700 | [diff] [blame] | 440 | } |
| 441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 443 | { |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 444 | qdisc_reset_all_tx_gt(dev, 0); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 445 | } |
| 446 | |
David S. Miller | 3e745dd | 2008-07-08 23:00:25 -0700 | [diff] [blame] | 447 | /* Are all TX queues of the device empty? */ |
| 448 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) |
| 449 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 450 | unsigned int i; |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 451 | |
| 452 | rcu_read_lock(); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 453 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 454 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 455 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
David S. Miller | 3e745dd | 2008-07-08 23:00:25 -0700 | [diff] [blame] | 456 | |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 457 | if (q->q.qlen) { |
| 458 | rcu_read_unlock(); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 459 | return false; |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 460 | } |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 461 | } |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 462 | rcu_read_unlock(); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 463 | return true; |
David S. Miller | 3e745dd | 2008-07-08 23:00:25 -0700 | [diff] [blame] | 464 | } |
| 465 | |
David S. Miller | 6fa9864 | 2008-07-08 23:01:06 -0700 | [diff] [blame] | 466 | /* Are any of the TX qdiscs changing? */ |
Eric Dumazet | 05bdd2f | 2011-10-20 17:45:43 -0400 | [diff] [blame] | 467 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
David S. Miller | 6fa9864 | 2008-07-08 23:01:06 -0700 | [diff] [blame] | 468 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 469 | unsigned int i; |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 470 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 471 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 472 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 473 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 474 | return true; |
| 475 | } |
| 476 | return false; |
David S. Miller | 6fa9864 | 2008-07-08 23:01:06 -0700 | [diff] [blame] | 477 | } |
| 478 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 479 | /* Is the device using the noop qdisc on all queues? */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 480 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
| 481 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 482 | unsigned int i; |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 483 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 484 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 485 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
John Fastabend | 46e5da4 | 2014-09-12 20:04:52 -0700 | [diff] [blame] | 486 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 487 | return false; |
| 488 | } |
| 489 | return true; |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 490 | } |
| 491 | |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 492 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 493 | { |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 494 | return qdisc_skb_cb(skb)->pkt_len; |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 495 | } |
| 496 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 497 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 498 | enum net_xmit_qdisc_t { |
| 499 | __NET_XMIT_STOLEN = 0x00010000, |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 500 | __NET_XMIT_BYPASS = 0x00020000, |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 501 | }; |
| 502 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 503 | #ifdef CONFIG_NET_CLS_ACT |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 504 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 505 | #else |
| 506 | #define net_xmit_drop_count(e) (1) |
| 507 | #endif |
| 508 | |
Eric Dumazet | a2da570 | 2011-01-20 03:48:19 +0000 | [diff] [blame] | 509 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
| 510 | const struct Qdisc *sch) |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 511 | { |
David S. Miller | 3a682fb | 2008-07-20 18:13:01 -0700 | [diff] [blame] | 512 | #ifdef CONFIG_NET_SCHED |
Eric Dumazet | a2da570 | 2011-01-20 03:48:19 +0000 | [diff] [blame] | 513 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
| 514 | |
| 515 | if (stab) |
| 516 | __qdisc_calculate_pkt_len(skb, stab); |
David S. Miller | 3a682fb | 2008-07-20 18:13:01 -0700 | [diff] [blame] | 517 | #endif |
Eric Dumazet | a2da570 | 2011-01-20 03:48:19 +0000 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
| 521 | { |
| 522 | qdisc_calculate_pkt_len(skb, sch); |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 523 | return sch->enqueue(skb, sch); |
| 524 | } |
| 525 | |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 526 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
| 527 | { |
| 528 | return q->flags & TCQ_F_CPUSTATS; |
| 529 | } |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 530 | |
Amir Vadai | 3804070 | 2016-05-13 12:55:35 +0000 | [diff] [blame] | 531 | static inline void _bstats_update(struct gnet_stats_basic_packed *bstats, |
| 532 | __u64 bytes, __u32 packets) |
| 533 | { |
| 534 | bstats->bytes += bytes; |
| 535 | bstats->packets += packets; |
| 536 | } |
| 537 | |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 538 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, |
| 539 | const struct sk_buff *skb) |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 540 | { |
Amir Vadai | 3804070 | 2016-05-13 12:55:35 +0000 | [diff] [blame] | 541 | _bstats_update(bstats, |
| 542 | qdisc_pkt_len(skb), |
| 543 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); |
| 544 | } |
| 545 | |
| 546 | static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, |
| 547 | __u64 bytes, __u32 packets) |
| 548 | { |
| 549 | u64_stats_update_begin(&bstats->syncp); |
| 550 | _bstats_update(&bstats->bstats, bytes, packets); |
| 551 | u64_stats_update_end(&bstats->syncp); |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 552 | } |
| 553 | |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 554 | static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, |
| 555 | const struct sk_buff *skb) |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 556 | { |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 557 | u64_stats_update_begin(&bstats->syncp); |
| 558 | bstats_update(&bstats->bstats, skb); |
| 559 | u64_stats_update_end(&bstats->syncp); |
| 560 | } |
| 561 | |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 562 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
| 563 | const struct sk_buff *skb) |
| 564 | { |
| 565 | bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb); |
| 566 | } |
| 567 | |
Eric Dumazet | bfe0d02 | 2011-01-09 08:30:54 +0000 | [diff] [blame] | 568 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
| 569 | const struct sk_buff *skb) |
| 570 | { |
| 571 | bstats_update(&sch->bstats, skb); |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 572 | } |
| 573 | |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 574 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
| 575 | const struct sk_buff *skb) |
| 576 | { |
| 577 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
| 578 | } |
| 579 | |
| 580 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
| 581 | const struct sk_buff *skb) |
| 582 | { |
| 583 | sch->qstats.backlog += qdisc_pkt_len(skb); |
| 584 | } |
| 585 | |
| 586 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
| 587 | { |
| 588 | sch->qstats.drops += count; |
| 589 | } |
| 590 | |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 591 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 592 | { |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 593 | qstats->drops++; |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 594 | } |
| 595 | |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 596 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
John Fastabend | b0ab6f9 | 2014-09-28 11:54:24 -0700 | [diff] [blame] | 597 | { |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 598 | qstats->overlimits++; |
| 599 | } |
John Fastabend | b0ab6f9 | 2014-09-28 11:54:24 -0700 | [diff] [blame] | 600 | |
Eric Dumazet | 24ea591 | 2015-07-06 05:18:03 -0700 | [diff] [blame] | 601 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
| 602 | { |
| 603 | qstats_drop_inc(&sch->qstats); |
| 604 | } |
| 605 | |
| 606 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) |
| 607 | { |
| 608 | qstats_drop_inc(this_cpu_ptr(sch->cpu_qstats)); |
John Fastabend | b0ab6f9 | 2014-09-28 11:54:24 -0700 | [diff] [blame] | 609 | } |
| 610 | |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 611 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
| 612 | { |
| 613 | sch->qstats.overlimits++; |
| 614 | } |
| 615 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 616 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
| 617 | struct sk_buff_head *list) |
| 618 | { |
| 619 | __skb_queue_tail(list, skb); |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 620 | qdisc_qstats_backlog_inc(sch, skb); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 621 | |
| 622 | return NET_XMIT_SUCCESS; |
| 623 | } |
| 624 | |
| 625 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) |
| 626 | { |
| 627 | return __qdisc_enqueue_tail(skb, sch, &sch->q); |
| 628 | } |
| 629 | |
| 630 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, |
| 631 | struct sk_buff_head *list) |
| 632 | { |
| 633 | struct sk_buff *skb = __skb_dequeue(list); |
| 634 | |
Eric Dumazet | 9190b3b | 2011-01-20 23:31:33 -0800 | [diff] [blame] | 635 | if (likely(skb != NULL)) { |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 636 | qdisc_qstats_backlog_dec(sch, skb); |
Eric Dumazet | 9190b3b | 2011-01-20 23:31:33 -0800 | [diff] [blame] | 637 | qdisc_bstats_update(sch, skb); |
| 638 | } |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 639 | |
| 640 | return skb; |
| 641 | } |
| 642 | |
| 643 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) |
| 644 | { |
| 645 | return __qdisc_dequeue_head(sch, &sch->q); |
| 646 | } |
| 647 | |
Hagen Paul Pfeifer | 57dbb2d | 2010-01-24 12:30:59 +0000 | [diff] [blame] | 648 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
| 649 | struct sk_buff_head *list) |
| 650 | { |
Eric Dumazet | 9190b3b | 2011-01-20 23:31:33 -0800 | [diff] [blame] | 651 | struct sk_buff *skb = __skb_dequeue(list); |
Hagen Paul Pfeifer | 57dbb2d | 2010-01-24 12:30:59 +0000 | [diff] [blame] | 652 | |
| 653 | if (likely(skb != NULL)) { |
| 654 | unsigned int len = qdisc_pkt_len(skb); |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 655 | qdisc_qstats_backlog_dec(sch, skb); |
Hagen Paul Pfeifer | 57dbb2d | 2010-01-24 12:30:59 +0000 | [diff] [blame] | 656 | kfree_skb(skb); |
| 657 | return len; |
| 658 | } |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) |
| 664 | { |
| 665 | return __qdisc_queue_drop_head(sch, &sch->q); |
| 666 | } |
| 667 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 668 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, |
| 669 | struct sk_buff_head *list) |
| 670 | { |
| 671 | struct sk_buff *skb = __skb_dequeue_tail(list); |
| 672 | |
| 673 | if (likely(skb != NULL)) |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 674 | qdisc_qstats_backlog_dec(sch, skb); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 675 | |
| 676 | return skb; |
| 677 | } |
| 678 | |
| 679 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) |
| 680 | { |
| 681 | return __qdisc_dequeue_tail(sch, &sch->q); |
| 682 | } |
| 683 | |
Patrick McHardy | 48a8f51 | 2008-10-31 00:44:18 -0700 | [diff] [blame] | 684 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
| 685 | { |
| 686 | return skb_peek(&sch->q); |
| 687 | } |
| 688 | |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 689 | /* generic pseudo peek method for non-work-conserving qdisc */ |
| 690 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) |
| 691 | { |
| 692 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 693 | if (!sch->gso_skb) { |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 694 | sch->gso_skb = sch->dequeue(sch); |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 695 | if (sch->gso_skb) |
| 696 | /* it's still part of the queue */ |
| 697 | sch->q.qlen++; |
| 698 | } |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 699 | |
| 700 | return sch->gso_skb; |
| 701 | } |
| 702 | |
| 703 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ |
| 704 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) |
| 705 | { |
| 706 | struct sk_buff *skb = sch->gso_skb; |
| 707 | |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 708 | if (skb) { |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 709 | sch->gso_skb = NULL; |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 710 | sch->q.qlen--; |
| 711 | } else { |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 712 | skb = sch->dequeue(sch); |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 713 | } |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 714 | |
| 715 | return skb; |
| 716 | } |
| 717 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 718 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
| 719 | struct sk_buff_head *list) |
| 720 | { |
| 721 | /* |
| 722 | * We do not know the backlog in bytes of this list, it |
| 723 | * is up to the caller to correct it |
| 724 | */ |
David S. Miller | 93245dd | 2008-07-17 04:03:43 -0700 | [diff] [blame] | 725 | __skb_queue_purge(list); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 726 | } |
| 727 | |
| 728 | static inline void qdisc_reset_queue(struct Qdisc *sch) |
| 729 | { |
| 730 | __qdisc_reset_queue(sch, &sch->q); |
| 731 | sch->qstats.backlog = 0; |
| 732 | } |
| 733 | |
WANG Cong | 86a7996 | 2016-02-25 14:55:00 -0800 | [diff] [blame] | 734 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
| 735 | struct Qdisc **pold) |
| 736 | { |
| 737 | struct Qdisc *old; |
| 738 | |
| 739 | sch_tree_lock(sch); |
| 740 | old = *pold; |
| 741 | *pold = new; |
| 742 | if (old != NULL) { |
WANG Cong | 2ccccf5 | 2016-02-25 14:55:01 -0800 | [diff] [blame] | 743 | qdisc_tree_reduce_backlog(old, old->q.qlen, old->qstats.backlog); |
WANG Cong | 86a7996 | 2016-02-25 14:55:00 -0800 | [diff] [blame] | 744 | qdisc_reset(old); |
| 745 | } |
| 746 | sch_tree_unlock(sch); |
| 747 | |
| 748 | return old; |
| 749 | } |
| 750 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 751 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, |
| 752 | struct sk_buff_head *list) |
| 753 | { |
| 754 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); |
| 755 | |
| 756 | if (likely(skb != NULL)) { |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 757 | unsigned int len = qdisc_pkt_len(skb); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 758 | kfree_skb(skb); |
| 759 | return len; |
| 760 | } |
| 761 | |
| 762 | return 0; |
| 763 | } |
| 764 | |
| 765 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) |
| 766 | { |
| 767 | return __qdisc_queue_drop(sch, &sch->q); |
| 768 | } |
| 769 | |
| 770 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
| 771 | { |
| 772 | kfree_skb(skb); |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 773 | qdisc_qstats_drop(sch); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 774 | |
| 775 | return NET_XMIT_DROP; |
| 776 | } |
| 777 | |
| 778 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) |
| 779 | { |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 780 | qdisc_qstats_drop(sch); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 781 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 782 | #ifdef CONFIG_NET_CLS_ACT |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 783 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
| 784 | goto drop; |
| 785 | |
| 786 | return NET_XMIT_SUCCESS; |
| 787 | |
| 788 | drop: |
| 789 | #endif |
| 790 | kfree_skb(skb); |
| 791 | return NET_XMIT_DROP; |
| 792 | } |
| 793 | |
Jesper Dangaard Brouer | e9bef55 | 2007-09-12 16:35:24 +0200 | [diff] [blame] | 794 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
| 795 | long it will take to send a packet given its size. |
| 796 | */ |
| 797 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) |
| 798 | { |
Jesper Dangaard Brouer | e08b099 | 2007-09-12 16:36:28 +0200 | [diff] [blame] | 799 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
| 800 | if (slot < 0) |
| 801 | slot = 0; |
Jesper Dangaard Brouer | e9bef55 | 2007-09-12 16:35:24 +0200 | [diff] [blame] | 802 | slot >>= rtab->rate.cell_log; |
| 803 | if (slot > 255) |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 804 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
Jesper Dangaard Brouer | e9bef55 | 2007-09-12 16:35:24 +0200 | [diff] [blame] | 805 | return rtab->data[slot]; |
| 806 | } |
| 807 | |
Jiri Pirko | 292f1c7 | 2013-02-12 00:12:03 +0000 | [diff] [blame] | 808 | struct psched_ratecfg { |
Eric Dumazet | 130d3d6 | 2013-06-06 13:56:19 -0700 | [diff] [blame] | 809 | u64 rate_bytes_ps; /* bytes per second */ |
Eric Dumazet | 01cb71d | 2013-06-02 13:55:05 +0000 | [diff] [blame] | 810 | u32 mult; |
| 811 | u16 overhead; |
Jesper Dangaard Brouer | 8a8e3d8 | 2013-08-14 23:47:11 +0200 | [diff] [blame] | 812 | u8 linklayer; |
Eric Dumazet | 01cb71d | 2013-06-02 13:55:05 +0000 | [diff] [blame] | 813 | u8 shift; |
Jiri Pirko | 292f1c7 | 2013-02-12 00:12:03 +0000 | [diff] [blame] | 814 | }; |
| 815 | |
| 816 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, |
| 817 | unsigned int len) |
| 818 | { |
Jesper Dangaard Brouer | 8a8e3d8 | 2013-08-14 23:47:11 +0200 | [diff] [blame] | 819 | len += r->overhead; |
| 820 | |
| 821 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) |
| 822 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; |
| 823 | |
| 824 | return ((u64)len * r->mult) >> r->shift; |
Jiri Pirko | 292f1c7 | 2013-02-12 00:12:03 +0000 | [diff] [blame] | 825 | } |
| 826 | |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 827 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
Eric Dumazet | 3e1e3aa | 2013-09-19 09:10:03 -0700 | [diff] [blame] | 828 | const struct tc_ratespec *conf, |
| 829 | u64 rate64); |
Jiri Pirko | 292f1c7 | 2013-02-12 00:12:03 +0000 | [diff] [blame] | 830 | |
Eric Dumazet | 01cb71d | 2013-06-02 13:55:05 +0000 | [diff] [blame] | 831 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
| 832 | const struct psched_ratecfg *r) |
Jiri Pirko | 292f1c7 | 2013-02-12 00:12:03 +0000 | [diff] [blame] | 833 | { |
Eric Dumazet | 01cb71d | 2013-06-02 13:55:05 +0000 | [diff] [blame] | 834 | memset(res, 0, sizeof(*res)); |
Eric Dumazet | 3e1e3aa | 2013-09-19 09:10:03 -0700 | [diff] [blame] | 835 | |
| 836 | /* legacy struct tc_ratespec has a 32bit @rate field |
| 837 | * Qdisc using 64bit rate should add new attributes |
| 838 | * in order to maintain compatibility. |
| 839 | */ |
| 840 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); |
| 841 | |
Eric Dumazet | 01cb71d | 2013-06-02 13:55:05 +0000 | [diff] [blame] | 842 | res->overhead = r->overhead; |
Jesper Dangaard Brouer | 8a8e3d8 | 2013-08-14 23:47:11 +0200 | [diff] [blame] | 843 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
Jiri Pirko | 292f1c7 | 2013-02-12 00:12:03 +0000 | [diff] [blame] | 844 | } |
| 845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | #endif |