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> |
| 7 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/pkt_sched.h> |
| 9 | #include <linux/pkt_cls.h> |
| 10 | #include <net/gen_stats.h> |
Thomas Graf | be577dd | 2007-03-22 11:55:50 -0700 | [diff] [blame] | 11 | #include <net/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | struct Qdisc_ops; |
| 14 | struct qdisc_walker; |
| 15 | struct tcf_walker; |
| 16 | struct module; |
| 17 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 18 | struct qdisc_rate_table { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | struct tc_ratespec rate; |
| 20 | u32 data[256]; |
| 21 | struct qdisc_rate_table *next; |
| 22 | int refcnt; |
| 23 | }; |
| 24 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 25 | enum qdisc_state_t { |
David S. Miller | e2627c8 | 2008-07-16 00:56:32 -0700 | [diff] [blame] | 26 | __QDISC_STATE_RUNNING, |
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, |
David S. Miller | e2627c8 | 2008-07-16 00:56:32 -0700 | [diff] [blame] | 29 | }; |
| 30 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 31 | struct qdisc_size_table { |
| 32 | struct list_head list; |
| 33 | struct tc_sizespec szopts; |
| 34 | int refcnt; |
| 35 | u16 data[]; |
| 36 | }; |
| 37 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 38 | struct Qdisc { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); |
| 40 | struct sk_buff * (*dequeue)(struct Qdisc *dev); |
| 41 | unsigned flags; |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 42 | #define TCQ_F_BUILTIN 1 |
| 43 | #define TCQ_F_THROTTLED 2 |
| 44 | #define TCQ_F_INGRESS 4 |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 45 | #define TCQ_F_CAN_BYPASS 8 |
Patrick McHardy | 23bcf63 | 2009-09-09 18:11:23 -0700 | [diff] [blame] | 46 | #define TCQ_F_MQROOT 16 |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 47 | #define TCQ_F_WARN_NONWC (1 << 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | int padded; |
| 49 | struct Qdisc_ops *ops; |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 50 | struct qdisc_size_table *stab; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 51 | struct list_head list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | u32 handle; |
| 53 | u32 parent; |
| 54 | atomic_t refcnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | struct gnet_stats_rate_est rate_est; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int (*reshape_fail)(struct sk_buff *skb, |
| 57 | struct Qdisc *q); |
| 58 | |
David S. Miller | 72b25a9 | 2008-07-18 20:54:17 -0700 | [diff] [blame] | 59 | void *u32_node; |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | /* This field is deprecated, but it is still used by CBQ |
| 62 | * and it will live until better solution will be invented. |
| 63 | */ |
| 64 | struct Qdisc *__parent; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 65 | struct netdev_queue *dev_queue; |
| 66 | struct Qdisc *next_sched; |
| 67 | |
| 68 | struct sk_buff *gso_skb; |
| 69 | /* |
| 70 | * For performance sake on SMP, we put highly modified fields at the end |
| 71 | */ |
| 72 | unsigned long state; |
| 73 | struct sk_buff_head q; |
Eric Dumazet | c1a8f1f | 2009-08-16 09:36:49 +0000 | [diff] [blame] | 74 | struct gnet_stats_basic_packed bstats; |
Eric Dumazet | 5e140df | 2009-03-20 01:33:32 -0700 | [diff] [blame] | 75 | struct gnet_stats_queue qstats; |
Eric Dumazet | 5d944c6 | 2010-03-31 07:06:04 +0000 | [diff] [blame] | 76 | struct rcu_head rcu_head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | }; |
| 78 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 79 | struct Qdisc_class_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | /* Child qdisc manipulation */ |
Jarek Poplawski | 926e61b | 2009-09-15 02:53:07 -0700 | [diff] [blame] | 81 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | int (*graft)(struct Qdisc *, unsigned long cl, |
| 83 | struct Qdisc *, struct Qdisc **); |
| 84 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 85 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | /* Class manipulation routines */ |
| 88 | unsigned long (*get)(struct Qdisc *, u32 classid); |
| 89 | void (*put)(struct Qdisc *, unsigned long); |
| 90 | int (*change)(struct Qdisc *, u32, u32, |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 91 | struct nlattr **, unsigned long *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | int (*delete)(struct Qdisc *, unsigned long); |
| 93 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); |
| 94 | |
| 95 | /* Filter manipulation */ |
| 96 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); |
| 97 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
| 98 | u32 classid); |
| 99 | void (*unbind_tcf)(struct Qdisc *, unsigned long); |
| 100 | |
| 101 | /* rtnetlink specific */ |
| 102 | int (*dump)(struct Qdisc *, unsigned long, |
| 103 | struct sk_buff *skb, struct tcmsg*); |
| 104 | int (*dump_stats)(struct Qdisc *, unsigned long, |
| 105 | struct gnet_dump *); |
| 106 | }; |
| 107 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 108 | struct Qdisc_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | struct Qdisc_ops *next; |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 110 | const struct Qdisc_class_ops *cl_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | char id[IFNAMSIZ]; |
| 112 | int priv_size; |
| 113 | |
| 114 | int (*enqueue)(struct sk_buff *, struct Qdisc *); |
| 115 | struct sk_buff * (*dequeue)(struct Qdisc *); |
Jarek Poplawski | 90d841fd | 2008-10-31 00:43:45 -0700 | [diff] [blame] | 116 | struct sk_buff * (*peek)(struct Qdisc *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | unsigned int (*drop)(struct Qdisc *); |
| 118 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 119 | int (*init)(struct Qdisc *, struct nlattr *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | void (*reset)(struct Qdisc *); |
| 121 | void (*destroy)(struct Qdisc *); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 122 | int (*change)(struct Qdisc *, struct nlattr *arg); |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 123 | void (*attach)(struct Qdisc *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | int (*dump)(struct Qdisc *, struct sk_buff *); |
| 126 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); |
| 127 | |
| 128 | struct module *owner; |
| 129 | }; |
| 130 | |
| 131 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 132 | struct tcf_result { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | unsigned long class; |
| 134 | u32 classid; |
| 135 | }; |
| 136 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 137 | struct tcf_proto_ops { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | struct tcf_proto_ops *next; |
| 139 | char kind[IFNAMSIZ]; |
| 140 | |
| 141 | int (*classify)(struct sk_buff*, struct tcf_proto*, |
| 142 | struct tcf_result *); |
| 143 | int (*init)(struct tcf_proto*); |
| 144 | void (*destroy)(struct tcf_proto*); |
| 145 | |
| 146 | unsigned long (*get)(struct tcf_proto*, u32 handle); |
| 147 | void (*put)(struct tcf_proto*, unsigned long); |
| 148 | int (*change)(struct tcf_proto*, unsigned long, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 149 | u32 handle, struct nlattr **, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | unsigned long *); |
| 151 | int (*delete)(struct tcf_proto*, unsigned long); |
| 152 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); |
| 153 | |
| 154 | /* rtnetlink specific */ |
| 155 | int (*dump)(struct tcf_proto*, unsigned long, |
| 156 | struct sk_buff *skb, struct tcmsg*); |
| 157 | |
| 158 | struct module *owner; |
| 159 | }; |
| 160 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 161 | struct tcf_proto { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | /* Fast access part */ |
| 163 | struct tcf_proto *next; |
| 164 | void *root; |
| 165 | int (*classify)(struct sk_buff*, struct tcf_proto*, |
| 166 | struct tcf_result *); |
Al Viro | 66c6f52 | 2006-11-20 18:07:51 -0800 | [diff] [blame] | 167 | __be16 protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | /* All the rest */ |
| 170 | u32 prio; |
| 171 | u32 classid; |
| 172 | struct Qdisc *q; |
| 173 | void *data; |
| 174 | struct tcf_proto_ops *ops; |
| 175 | }; |
| 176 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 177 | struct qdisc_skb_cb { |
| 178 | unsigned int pkt_len; |
| 179 | char data[]; |
| 180 | }; |
| 181 | |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 182 | static inline int qdisc_qlen(struct Qdisc *q) |
| 183 | { |
| 184 | return q->q.qlen; |
| 185 | } |
| 186 | |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 187 | static inline struct qdisc_skb_cb *qdisc_skb_cb(struct sk_buff *skb) |
| 188 | { |
| 189 | return (struct qdisc_skb_cb *)skb->cb; |
| 190 | } |
| 191 | |
David S. Miller | 8387400 | 2008-07-17 00:53:03 -0700 | [diff] [blame] | 192 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
| 193 | { |
| 194 | return &qdisc->q.lock; |
| 195 | } |
| 196 | |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 197 | static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc) |
| 198 | { |
| 199 | return qdisc->dev_queue->qdisc; |
| 200 | } |
| 201 | |
Jarek Poplawski | 2540e05 | 2008-08-21 05:11:14 -0700 | [diff] [blame] | 202 | static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc) |
| 203 | { |
| 204 | return qdisc->dev_queue->qdisc_sleeping; |
| 205 | } |
| 206 | |
David S. Miller | 7e43f11 | 2008-08-02 23:27:37 -0700 | [diff] [blame] | 207 | /* The qdisc root lock is a mechanism by which to top level |
| 208 | * of a qdisc tree can be locked from any qdisc node in the |
| 209 | * forest. This allows changing the configuration of some |
| 210 | * aspect of the qdisc tree while blocking out asynchronous |
| 211 | * qdisc access in the packet processing paths. |
| 212 | * |
| 213 | * It is only legal to do this when the root will not change |
| 214 | * on us. Otherwise we'll potentially lock the wrong qdisc |
| 215 | * root. This is enforced by holding the RTNL semaphore, which |
| 216 | * all users of this lock accessor must do. |
| 217 | */ |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 218 | static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc) |
| 219 | { |
| 220 | struct Qdisc *root = qdisc_root(qdisc); |
| 221 | |
David S. Miller | 7e43f11 | 2008-08-02 23:27:37 -0700 | [diff] [blame] | 222 | ASSERT_RTNL(); |
David S. Miller | 8387400 | 2008-07-17 00:53:03 -0700 | [diff] [blame] | 223 | return qdisc_lock(root); |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 224 | } |
| 225 | |
Jarek Poplawski | f6f9b93 | 2008-08-27 02:25:17 -0700 | [diff] [blame] | 226 | static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc) |
| 227 | { |
| 228 | struct Qdisc *root = qdisc_root_sleeping(qdisc); |
| 229 | |
| 230 | ASSERT_RTNL(); |
| 231 | return qdisc_lock(root); |
| 232 | } |
| 233 | |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 234 | static inline struct net_device *qdisc_dev(struct Qdisc *qdisc) |
| 235 | { |
| 236 | return qdisc->dev_queue->dev; |
| 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 239 | static inline void sch_tree_lock(struct Qdisc *q) |
| 240 | { |
Jarek Poplawski | fe439dd | 2008-08-27 02:27:10 -0700 | [diff] [blame] | 241 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static inline void sch_tree_unlock(struct Qdisc *q) |
| 245 | { |
Jarek Poplawski | fe439dd | 2008-08-27 02:27:10 -0700 | [diff] [blame] | 246 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
David S. Miller | 78a5b30 | 2008-07-16 03:12:24 -0700 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) |
| 250 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 252 | extern struct Qdisc noop_qdisc; |
| 253 | extern struct Qdisc_ops noop_qdisc_ops; |
David S. Miller | 6ec1c69 | 2009-09-06 01:58:51 -0700 | [diff] [blame] | 254 | extern struct Qdisc_ops pfifo_fast_ops; |
| 255 | extern struct Qdisc_ops mq_qdisc_ops; |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 256 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 257 | struct Qdisc_class_common { |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 258 | u32 classid; |
| 259 | struct hlist_node hnode; |
| 260 | }; |
| 261 | |
Eric Dumazet | fd2c3ef | 2009-11-03 03:26:03 +0000 | [diff] [blame] | 262 | struct Qdisc_class_hash { |
Patrick McHardy | 6fe1c7a | 2008-07-05 23:21:31 -0700 | [diff] [blame] | 263 | struct hlist_head *hash; |
| 264 | unsigned int hashsize; |
| 265 | unsigned int hashmask; |
| 266 | unsigned int hashelems; |
| 267 | }; |
| 268 | |
| 269 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) |
| 270 | { |
| 271 | id ^= id >> 8; |
| 272 | id ^= id >> 4; |
| 273 | return id & mask; |
| 274 | } |
| 275 | |
| 276 | static inline struct Qdisc_class_common * |
| 277 | qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) |
| 278 | { |
| 279 | struct Qdisc_class_common *cl; |
| 280 | struct hlist_node *n; |
| 281 | unsigned int h; |
| 282 | |
| 283 | h = qdisc_class_hash(id, hash->hashmask); |
| 284 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { |
| 285 | if (cl->classid == id) |
| 286 | return cl; |
| 287 | } |
| 288 | return NULL; |
| 289 | } |
| 290 | |
| 291 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); |
| 292 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); |
| 293 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); |
| 294 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); |
| 295 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); |
| 296 | |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 297 | extern void dev_init_scheduler(struct net_device *dev); |
| 298 | extern void dev_shutdown(struct net_device *dev); |
| 299 | extern void dev_activate(struct net_device *dev); |
| 300 | extern void dev_deactivate(struct net_device *dev); |
Patrick McHardy | 589983c | 2009-09-04 06:41:20 +0000 | [diff] [blame] | 301 | extern struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, |
| 302 | struct Qdisc *qdisc); |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 303 | extern void qdisc_reset(struct Qdisc *qdisc); |
| 304 | extern void qdisc_destroy(struct Qdisc *qdisc); |
Patrick McHardy | 43effa1 | 2006-11-29 17:35:48 -0800 | [diff] [blame] | 305 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 306 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 307 | struct Qdisc_ops *ops); |
Thomas Graf | e41a33e | 2005-07-05 14:14:30 -0700 | [diff] [blame] | 308 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 309 | struct netdev_queue *dev_queue, |
Patrick McHardy | 9f9afec | 2006-11-29 17:35:18 -0800 | [diff] [blame] | 310 | struct Qdisc_ops *ops, u32 parentid); |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 311 | extern void qdisc_calculate_pkt_len(struct sk_buff *skb, |
| 312 | struct qdisc_size_table *stab); |
Patrick McHardy | a48b5a6 | 2007-03-23 11:29:43 -0700 | [diff] [blame] | 313 | extern void tcf_destroy(struct tcf_proto *tp); |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 314 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 316 | /* Reset all TX qdiscs greater then index of a device. */ |
| 317 | 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] | 318 | { |
John Fastabend | 4ef6acf | 2010-07-01 13:21:35 +0000 | [diff] [blame] | 319 | struct Qdisc *qdisc; |
| 320 | |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 321 | for (; i < dev->num_tx_queues; i++) { |
John Fastabend | 4ef6acf | 2010-07-01 13:21:35 +0000 | [diff] [blame] | 322 | qdisc = netdev_get_tx_queue(dev, i)->qdisc; |
| 323 | if (qdisc) { |
| 324 | spin_lock_bh(qdisc_lock(qdisc)); |
| 325 | qdisc_reset(qdisc); |
| 326 | spin_unlock_bh(qdisc_lock(qdisc)); |
| 327 | } |
| 328 | } |
David S. Miller | 5aa7099 | 2008-07-08 22:59:10 -0700 | [diff] [blame] | 329 | } |
| 330 | |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 331 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
| 332 | { |
| 333 | qdisc_reset_all_tx_gt(dev, 0); |
| 334 | } |
| 335 | |
David S. Miller | 3e745dd | 2008-07-08 23:00:25 -0700 | [diff] [blame] | 336 | /* Are all TX queues of the device empty? */ |
| 337 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) |
| 338 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 339 | unsigned int i; |
| 340 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 341 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 342 | const struct Qdisc *q = txq->qdisc; |
David S. Miller | 3e745dd | 2008-07-08 23:00:25 -0700 | [diff] [blame] | 343 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 344 | if (q->q.qlen) |
| 345 | return false; |
| 346 | } |
| 347 | return true; |
David S. Miller | 3e745dd | 2008-07-08 23:00:25 -0700 | [diff] [blame] | 348 | } |
| 349 | |
David S. Miller | 6fa9864 | 2008-07-08 23:01:06 -0700 | [diff] [blame] | 350 | /* Are any of the TX qdiscs changing? */ |
| 351 | static inline bool qdisc_tx_changing(struct net_device *dev) |
| 352 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 353 | unsigned int i; |
| 354 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 355 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 356 | if (txq->qdisc != txq->qdisc_sleeping) |
| 357 | return true; |
| 358 | } |
| 359 | return false; |
David S. Miller | 6fa9864 | 2008-07-08 23:01:06 -0700 | [diff] [blame] | 360 | } |
| 361 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 362 | /* Is the device using the noop qdisc on all queues? */ |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 363 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
| 364 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 365 | unsigned int i; |
| 366 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 367 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 368 | if (txq->qdisc != &noop_qdisc) |
| 369 | return false; |
| 370 | } |
| 371 | return true; |
David S. Miller | 0529794 | 2008-07-08 23:01:27 -0700 | [diff] [blame] | 372 | } |
| 373 | |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 374 | static inline unsigned int qdisc_pkt_len(struct sk_buff *skb) |
| 375 | { |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 376 | return qdisc_skb_cb(skb)->pkt_len; |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 377 | } |
| 378 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 379 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 380 | enum net_xmit_qdisc_t { |
| 381 | __NET_XMIT_STOLEN = 0x00010000, |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 382 | __NET_XMIT_BYPASS = 0x00020000, |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 383 | }; |
| 384 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 385 | #ifdef CONFIG_NET_CLS_ACT |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 386 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 387 | #else |
| 388 | #define net_xmit_drop_count(e) (1) |
| 389 | #endif |
| 390 | |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 391 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
| 392 | { |
David S. Miller | 3a682fb | 2008-07-20 18:13:01 -0700 | [diff] [blame] | 393 | #ifdef CONFIG_NET_SCHED |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 394 | if (sch->stab) |
| 395 | qdisc_calculate_pkt_len(skb, sch->stab); |
David S. Miller | 3a682fb | 2008-07-20 18:13:01 -0700 | [diff] [blame] | 396 | #endif |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 397 | return sch->enqueue(skb, sch); |
| 398 | } |
| 399 | |
| 400 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) |
| 401 | { |
Jussi Kivilinna | 175f9c1 | 2008-07-20 00:08:47 -0700 | [diff] [blame] | 402 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 403 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 406 | static inline void __qdisc_update_bstats(struct Qdisc *sch, unsigned int len) |
| 407 | { |
| 408 | sch->bstats.bytes += len; |
| 409 | sch->bstats.packets++; |
| 410 | } |
| 411 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 412 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
| 413 | struct sk_buff_head *list) |
| 414 | { |
| 415 | __skb_queue_tail(list, skb); |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 416 | sch->qstats.backlog += qdisc_pkt_len(skb); |
Krishna Kumar | bbd8a0d | 2009-08-06 01:44:21 +0000 | [diff] [blame] | 417 | __qdisc_update_bstats(sch, qdisc_pkt_len(skb)); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 418 | |
| 419 | return NET_XMIT_SUCCESS; |
| 420 | } |
| 421 | |
| 422 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) |
| 423 | { |
| 424 | return __qdisc_enqueue_tail(skb, sch, &sch->q); |
| 425 | } |
| 426 | |
| 427 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, |
| 428 | struct sk_buff_head *list) |
| 429 | { |
| 430 | struct sk_buff *skb = __skb_dequeue(list); |
| 431 | |
| 432 | if (likely(skb != NULL)) |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 433 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 434 | |
| 435 | return skb; |
| 436 | } |
| 437 | |
| 438 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) |
| 439 | { |
| 440 | return __qdisc_dequeue_head(sch, &sch->q); |
| 441 | } |
| 442 | |
Hagen Paul Pfeifer | 57dbb2d | 2010-01-24 12:30:59 +0000 | [diff] [blame] | 443 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
| 444 | struct sk_buff_head *list) |
| 445 | { |
| 446 | struct sk_buff *skb = __qdisc_dequeue_head(sch, list); |
| 447 | |
| 448 | if (likely(skb != NULL)) { |
| 449 | unsigned int len = qdisc_pkt_len(skb); |
| 450 | kfree_skb(skb); |
| 451 | return len; |
| 452 | } |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) |
| 458 | { |
| 459 | return __qdisc_queue_drop_head(sch, &sch->q); |
| 460 | } |
| 461 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 462 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, |
| 463 | struct sk_buff_head *list) |
| 464 | { |
| 465 | struct sk_buff *skb = __skb_dequeue_tail(list); |
| 466 | |
| 467 | if (likely(skb != NULL)) |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 468 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 469 | |
| 470 | return skb; |
| 471 | } |
| 472 | |
| 473 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) |
| 474 | { |
| 475 | return __qdisc_dequeue_tail(sch, &sch->q); |
| 476 | } |
| 477 | |
Patrick McHardy | 48a8f51 | 2008-10-31 00:44:18 -0700 | [diff] [blame] | 478 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
| 479 | { |
| 480 | return skb_peek(&sch->q); |
| 481 | } |
| 482 | |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 483 | /* generic pseudo peek method for non-work-conserving qdisc */ |
| 484 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) |
| 485 | { |
| 486 | /* 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] | 487 | if (!sch->gso_skb) { |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 488 | sch->gso_skb = sch->dequeue(sch); |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 489 | if (sch->gso_skb) |
| 490 | /* it's still part of the queue */ |
| 491 | sch->q.qlen++; |
| 492 | } |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 493 | |
| 494 | return sch->gso_skb; |
| 495 | } |
| 496 | |
| 497 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ |
| 498 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) |
| 499 | { |
| 500 | struct sk_buff *skb = sch->gso_skb; |
| 501 | |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 502 | if (skb) { |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 503 | sch->gso_skb = NULL; |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 504 | sch->q.qlen--; |
| 505 | } else { |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 506 | skb = sch->dequeue(sch); |
Jarek Poplawski | 61c9eaf | 2008-11-05 16:02:34 -0800 | [diff] [blame] | 507 | } |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 508 | |
| 509 | return skb; |
| 510 | } |
| 511 | |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 512 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
| 513 | struct sk_buff_head *list) |
| 514 | { |
| 515 | /* |
| 516 | * We do not know the backlog in bytes of this list, it |
| 517 | * is up to the caller to correct it |
| 518 | */ |
David S. Miller | 93245dd | 2008-07-17 04:03:43 -0700 | [diff] [blame] | 519 | __skb_queue_purge(list); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | static inline void qdisc_reset_queue(struct Qdisc *sch) |
| 523 | { |
| 524 | __qdisc_reset_queue(sch, &sch->q); |
| 525 | sch->qstats.backlog = 0; |
| 526 | } |
| 527 | |
| 528 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, |
| 529 | struct sk_buff_head *list) |
| 530 | { |
| 531 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); |
| 532 | |
| 533 | if (likely(skb != NULL)) { |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 534 | unsigned int len = qdisc_pkt_len(skb); |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 535 | kfree_skb(skb); |
| 536 | return len; |
| 537 | } |
| 538 | |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) |
| 543 | { |
| 544 | return __qdisc_queue_drop(sch, &sch->q); |
| 545 | } |
| 546 | |
| 547 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
| 548 | { |
| 549 | kfree_skb(skb); |
| 550 | sch->qstats.drops++; |
| 551 | |
| 552 | return NET_XMIT_DROP; |
| 553 | } |
| 554 | |
| 555 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) |
| 556 | { |
| 557 | sch->qstats.drops++; |
| 558 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 559 | #ifdef CONFIG_NET_CLS_ACT |
Thomas Graf | 9972b25 | 2005-06-18 22:57:26 -0700 | [diff] [blame] | 560 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
| 561 | goto drop; |
| 562 | |
| 563 | return NET_XMIT_SUCCESS; |
| 564 | |
| 565 | drop: |
| 566 | #endif |
| 567 | kfree_skb(skb); |
| 568 | return NET_XMIT_DROP; |
| 569 | } |
| 570 | |
Jesper Dangaard Brouer | e9bef55 | 2007-09-12 16:35:24 +0200 | [diff] [blame] | 571 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
| 572 | long it will take to send a packet given its size. |
| 573 | */ |
| 574 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) |
| 575 | { |
Jesper Dangaard Brouer | e08b099 | 2007-09-12 16:36:28 +0200 | [diff] [blame] | 576 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
| 577 | if (slot < 0) |
| 578 | slot = 0; |
Jesper Dangaard Brouer | e9bef55 | 2007-09-12 16:35:24 +0200 | [diff] [blame] | 579 | slot >>= rtab->rate.cell_log; |
| 580 | if (slot > 255) |
| 581 | return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); |
| 582 | return rtab->data[slot]; |
| 583 | } |
| 584 | |
Jamal Hadi Salim | 12da81d | 2007-10-26 02:47:23 -0700 | [diff] [blame] | 585 | #ifdef CONFIG_NET_CLS_ACT |
| 586 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) |
| 587 | { |
| 588 | struct sk_buff *n = skb_clone(skb, gfp_mask); |
| 589 | |
| 590 | if (n) { |
| 591 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); |
| 592 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); |
| 593 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); |
Jamal Hadi Salim | 12da81d | 2007-10-26 02:47:23 -0700 | [diff] [blame] | 594 | } |
| 595 | return n; |
| 596 | } |
| 597 | #endif |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | #endif |