Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/sch_cbq.c Class-Based Queueing discipline. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
| 11 | */ |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/types.h> |
| 16 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/skbuff.h> |
Patrick McHardy | 0ba4805 | 2007-07-02 22:49:07 -0700 | [diff] [blame] | 20 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <net/pkt_sched.h> |
| 22 | |
| 23 | |
| 24 | /* Class-Based Queueing (CBQ) algorithm. |
| 25 | ======================================= |
| 26 | |
| 27 | Sources: [1] Sally Floyd and Van Jacobson, "Link-sharing and Resource |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 28 | Management Models for Packet Networks", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | IEEE/ACM Transactions on Networking, Vol.3, No.4, 1995 |
| 30 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 31 | [2] Sally Floyd, "Notes on CBQ and Guaranteed Service", 1995 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 33 | [3] Sally Floyd, "Notes on Class-Based Queueing: Setting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | Parameters", 1996 |
| 35 | |
| 36 | [4] Sally Floyd and Michael Speer, "Experimental Results |
| 37 | for Class-Based Queueing", 1998, not published. |
| 38 | |
| 39 | ----------------------------------------------------------------------- |
| 40 | |
| 41 | Algorithm skeleton was taken from NS simulator cbq.cc. |
| 42 | If someone wants to check this code against the LBL version, |
| 43 | he should take into account that ONLY the skeleton was borrowed, |
| 44 | the implementation is different. Particularly: |
| 45 | |
| 46 | --- The WRR algorithm is different. Our version looks more |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 47 | reasonable (I hope) and works when quanta are allowed to be |
| 48 | less than MTU, which is always the case when real time classes |
| 49 | have small rates. Note, that the statement of [3] is |
| 50 | incomplete, delay may actually be estimated even if class |
| 51 | per-round allotment is less than MTU. Namely, if per-round |
| 52 | allotment is W*r_i, and r_1+...+r_k = r < 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | delay_i <= ([MTU/(W*r_i)]*W*r + W*r + k*MTU)/B |
| 55 | |
| 56 | In the worst case we have IntServ estimate with D = W*r+k*MTU |
| 57 | and C = MTU*r. The proof (if correct at all) is trivial. |
| 58 | |
| 59 | |
| 60 | --- It seems that cbq-2.0 is not very accurate. At least, I cannot |
| 61 | interpret some places, which look like wrong translations |
| 62 | from NS. Anyone is advised to find these differences |
| 63 | and explain to me, why I am wrong 8). |
| 64 | |
| 65 | --- Linux has no EOI event, so that we cannot estimate true class |
| 66 | idle time. Workaround is to consider the next dequeue event |
| 67 | as sign that previous packet is finished. This is wrong because of |
| 68 | internal device queueing, but on a permanently loaded link it is true. |
| 69 | Moreover, combined with clock integrator, this scheme looks |
| 70 | very close to an ideal solution. */ |
| 71 | |
| 72 | struct cbq_sched_data; |
| 73 | |
| 74 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 75 | struct cbq_class { |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 76 | struct Qdisc_class_common common; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | struct cbq_class *next_alive; /* next class with backlog in this priority band */ |
| 78 | |
| 79 | /* Parameters */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | unsigned char priority; /* class priority */ |
| 81 | unsigned char priority2; /* priority to be used after overlimit */ |
| 82 | unsigned char ewma_log; /* time constant for idle time calculation */ |
| 83 | unsigned char ovl_strategy; |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 84 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | unsigned char police; |
| 86 | #endif |
| 87 | |
| 88 | u32 defmap; |
| 89 | |
| 90 | /* Link-sharing scheduler parameters */ |
| 91 | long maxidle; /* Class parameters: see below. */ |
| 92 | long offtime; |
| 93 | long minidle; |
| 94 | u32 avpkt; |
| 95 | struct qdisc_rate_table *R_tab; |
| 96 | |
| 97 | /* Overlimit strategy parameters */ |
| 98 | void (*overlimit)(struct cbq_class *cl); |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 99 | psched_tdiff_t penalty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | /* General scheduler (WRR) parameters */ |
| 102 | long allot; |
| 103 | long quantum; /* Allotment per WRR round */ |
| 104 | long weight; /* Relative allotment: see below */ |
| 105 | |
| 106 | struct Qdisc *qdisc; /* Ptr to CBQ discipline */ |
| 107 | struct cbq_class *split; /* Ptr to split node */ |
| 108 | struct cbq_class *share; /* Ptr to LS parent in the class tree */ |
| 109 | struct cbq_class *tparent; /* Ptr to tree parent in the class tree */ |
| 110 | struct cbq_class *borrow; /* NULL if class is bandwidth limited; |
| 111 | parent otherwise */ |
| 112 | struct cbq_class *sibling; /* Sibling chain */ |
| 113 | struct cbq_class *children; /* Pointer to children chain */ |
| 114 | |
| 115 | struct Qdisc *q; /* Elementary queueing discipline */ |
| 116 | |
| 117 | |
| 118 | /* Variables */ |
| 119 | unsigned char cpriority; /* Effective priority */ |
| 120 | unsigned char delayed; |
| 121 | unsigned char level; /* level of the class in hierarchy: |
| 122 | 0 for leaf classes, and maximal |
| 123 | level of children + 1 for nodes. |
| 124 | */ |
| 125 | |
| 126 | psched_time_t last; /* Last end of service */ |
| 127 | psched_time_t undertime; |
| 128 | long avgidle; |
| 129 | long deficit; /* Saved deficit for WRR */ |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 130 | psched_time_t penalized; |
Eric Dumazet | c1a8f1f | 2009-08-16 09:36:49 +0000 | [diff] [blame] | 131 | struct gnet_stats_basic_packed bstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | struct gnet_stats_queue qstats; |
| 133 | struct gnet_stats_rate_est rate_est; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | struct tc_cbq_xstats xstats; |
| 135 | |
| 136 | struct tcf_proto *filter_list; |
| 137 | |
| 138 | int refcnt; |
| 139 | int filters; |
| 140 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 141 | struct cbq_class *defaults[TC_PRIO_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | }; |
| 143 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 144 | struct cbq_sched_data { |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 145 | struct Qdisc_class_hash clhash; /* Hash table of all classes */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 146 | int nclasses[TC_CBQ_MAXPRIO + 1]; |
| 147 | unsigned int quanta[TC_CBQ_MAXPRIO + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | struct cbq_class link; |
| 150 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 151 | unsigned int activemask; |
| 152 | struct cbq_class *active[TC_CBQ_MAXPRIO + 1]; /* List of all classes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | with backlog */ |
| 154 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 155 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | struct cbq_class *rx_class; |
| 157 | #endif |
| 158 | struct cbq_class *tx_class; |
| 159 | struct cbq_class *tx_borrowed; |
| 160 | int tx_len; |
| 161 | psched_time_t now; /* Cached timestamp */ |
| 162 | psched_time_t now_rt; /* Cached real time */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 163 | unsigned int pmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 165 | struct hrtimer delay_timer; |
Patrick McHardy | 88a9935 | 2007-03-16 01:21:11 -0700 | [diff] [blame] | 166 | struct qdisc_watchdog watchdog; /* Watchdog timer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | started when CBQ has |
| 168 | backlog, but cannot |
| 169 | transmit just now */ |
Patrick McHardy | 88a9935 | 2007-03-16 01:21:11 -0700 | [diff] [blame] | 170 | psched_tdiff_t wd_expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | int toplevel; |
| 172 | u32 hgenerator; |
| 173 | }; |
| 174 | |
| 175 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 176 | #define L2T(cl, len) qdisc_l2t((cl)->R_tab, len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 178 | static inline struct cbq_class * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | cbq_class_lookup(struct cbq_sched_data *q, u32 classid) |
| 180 | { |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 181 | struct Qdisc_class_common *clc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 183 | clc = qdisc_class_find(&q->clhash, classid); |
| 184 | if (clc == NULL) |
| 185 | return NULL; |
| 186 | return container_of(clc, struct cbq_class, common); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 189 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | static struct cbq_class * |
| 192 | cbq_reclassify(struct sk_buff *skb, struct cbq_class *this) |
| 193 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 194 | struct cbq_class *cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 196 | for (cl = this->tparent; cl; cl = cl->tparent) { |
| 197 | struct cbq_class *new = cl->defaults[TC_PRIO_BESTEFFORT]; |
| 198 | |
| 199 | if (new != NULL && new != this) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | return new; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | return NULL; |
| 203 | } |
| 204 | |
| 205 | #endif |
| 206 | |
| 207 | /* Classify packet. The procedure is pretty complicated, but |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 208 | * it allows us to combine link sharing and priority scheduling |
| 209 | * transparently. |
| 210 | * |
| 211 | * Namely, you can put link sharing rules (f.e. route based) at root of CBQ, |
| 212 | * so that it resolves to split nodes. Then packets are classified |
| 213 | * by logical priority, or a more specific classifier may be attached |
| 214 | * to the split node. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | */ |
| 216 | |
| 217 | static struct cbq_class * |
| 218 | cbq_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) |
| 219 | { |
| 220 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 221 | struct cbq_class *head = &q->link; |
| 222 | struct cbq_class **defmap; |
| 223 | struct cbq_class *cl = NULL; |
| 224 | u32 prio = skb->priority; |
| 225 | struct tcf_result res; |
| 226 | |
| 227 | /* |
| 228 | * Step 1. If skb->priority points to one of our classes, use it. |
| 229 | */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 230 | if (TC_H_MAJ(prio ^ sch->handle) == 0 && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | (cl = cbq_class_lookup(q, prio)) != NULL) |
| 232 | return cl; |
| 233 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 234 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | for (;;) { |
| 236 | int result = 0; |
| 237 | defmap = head->defaults; |
| 238 | |
| 239 | /* |
| 240 | * Step 2+n. Apply classifier. |
| 241 | */ |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 242 | if (!head->filter_list || |
| 243 | (result = tc_classify_compat(skb, head->filter_list, &res)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | goto fallback; |
| 245 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 246 | cl = (void *)res.class; |
| 247 | if (!cl) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (TC_H_MAJ(res.classid)) |
| 249 | cl = cbq_class_lookup(q, res.classid); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 250 | else if ((cl = defmap[res.classid & TC_PRIO_MAX]) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | cl = defmap[TC_PRIO_BESTEFFORT]; |
| 252 | |
Eric Dumazet | bdfc87f | 2012-09-11 13:11:12 +0000 | [diff] [blame] | 253 | if (cl == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | goto fallback; |
| 255 | } |
Eric Dumazet | bdfc87f | 2012-09-11 13:11:12 +0000 | [diff] [blame] | 256 | if (cl->level >= head->level) |
| 257 | goto fallback; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | #ifdef CONFIG_NET_CLS_ACT |
| 259 | switch (result) { |
| 260 | case TC_ACT_QUEUED: |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 261 | case TC_ACT_STOLEN: |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 262 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | case TC_ACT_SHOT: |
| 264 | return NULL; |
Patrick McHardy | 73ca491 | 2007-07-15 00:02:31 -0700 | [diff] [blame] | 265 | case TC_ACT_RECLASSIFY: |
| 266 | return cbq_reclassify(skb, cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | #endif |
| 269 | if (cl->level == 0) |
| 270 | return cl; |
| 271 | |
| 272 | /* |
| 273 | * Step 3+n. If classifier selected a link sharing class, |
| 274 | * apply agency specific classifier. |
| 275 | * Repeat this procdure until we hit a leaf node. |
| 276 | */ |
| 277 | head = cl; |
| 278 | } |
| 279 | |
| 280 | fallback: |
| 281 | cl = head; |
| 282 | |
| 283 | /* |
| 284 | * Step 4. No success... |
| 285 | */ |
| 286 | if (TC_H_MAJ(prio) == 0 && |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 287 | !(cl = head->defaults[prio & TC_PRIO_MAX]) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | !(cl = head->defaults[TC_PRIO_BESTEFFORT])) |
| 289 | return head; |
| 290 | |
| 291 | return cl; |
| 292 | } |
| 293 | |
| 294 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 295 | * A packet has just been enqueued on the empty class. |
| 296 | * cbq_activate_class adds it to the tail of active class list |
| 297 | * of its priority band. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | */ |
| 299 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 300 | static inline void cbq_activate_class(struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
| 302 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
| 303 | int prio = cl->cpriority; |
| 304 | struct cbq_class *cl_tail; |
| 305 | |
| 306 | cl_tail = q->active[prio]; |
| 307 | q->active[prio] = cl; |
| 308 | |
| 309 | if (cl_tail != NULL) { |
| 310 | cl->next_alive = cl_tail->next_alive; |
| 311 | cl_tail->next_alive = cl; |
| 312 | } else { |
| 313 | cl->next_alive = cl; |
| 314 | q->activemask |= (1<<prio); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 319 | * Unlink class from active chain. |
| 320 | * Note that this same procedure is done directly in cbq_dequeue* |
| 321 | * during round-robin procedure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | */ |
| 323 | |
| 324 | static void cbq_deactivate_class(struct cbq_class *this) |
| 325 | { |
| 326 | struct cbq_sched_data *q = qdisc_priv(this->qdisc); |
| 327 | int prio = this->cpriority; |
| 328 | struct cbq_class *cl; |
| 329 | struct cbq_class *cl_prev = q->active[prio]; |
| 330 | |
| 331 | do { |
| 332 | cl = cl_prev->next_alive; |
| 333 | if (cl == this) { |
| 334 | cl_prev->next_alive = cl->next_alive; |
| 335 | cl->next_alive = NULL; |
| 336 | |
| 337 | if (cl == q->active[prio]) { |
| 338 | q->active[prio] = cl_prev; |
| 339 | if (cl == q->active[prio]) { |
| 340 | q->active[prio] = NULL; |
| 341 | q->activemask &= ~(1<<prio); |
| 342 | return; |
| 343 | } |
| 344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | return; |
| 346 | } |
| 347 | } while ((cl_prev = cl) != q->active[prio]); |
| 348 | } |
| 349 | |
| 350 | static void |
| 351 | cbq_mark_toplevel(struct cbq_sched_data *q, struct cbq_class *cl) |
| 352 | { |
| 353 | int toplevel = q->toplevel; |
| 354 | |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 355 | if (toplevel > cl->level && !(qdisc_is_throttled(cl->q))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | psched_time_t now; |
| 357 | psched_tdiff_t incr; |
| 358 | |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 359 | now = psched_get_time(); |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 360 | incr = now - q->now_rt; |
Patrick McHardy | 7c59e25 | 2007-03-23 11:27:45 -0700 | [diff] [blame] | 361 | now = q->now + incr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
| 363 | do { |
Patrick McHardy | 104e087 | 2007-03-23 11:28:07 -0700 | [diff] [blame] | 364 | if (cl->undertime < now) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | q->toplevel = cl->level; |
| 366 | return; |
| 367 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 368 | } while ((cl = cl->borrow) != NULL && toplevel > cl->level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
| 370 | } |
| 371 | |
| 372 | static int |
| 373 | cbq_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
| 374 | { |
| 375 | struct cbq_sched_data *q = qdisc_priv(sch); |
Satyam Sharma | ddeee3c | 2007-09-16 14:54:05 -0700 | [diff] [blame] | 376 | int uninitialized_var(ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | struct cbq_class *cl = cbq_classify(skb, sch, &ret); |
| 378 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 379 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | q->rx_class = cl; |
| 381 | #endif |
| 382 | if (cl == NULL) { |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 383 | if (ret & __NET_XMIT_BYPASS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | sch->qstats.drops++; |
| 385 | kfree_skb(skb); |
| 386 | return ret; |
| 387 | } |
| 388 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 389 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | cl->q->__parent = sch; |
| 391 | #endif |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 392 | ret = qdisc_enqueue(skb, cl->q); |
| 393 | if (ret == NET_XMIT_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | sch->q.qlen++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | cbq_mark_toplevel(q, cl); |
| 396 | if (!cl->next_alive) |
| 397 | cbq_activate_class(cl); |
| 398 | return ret; |
| 399 | } |
| 400 | |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 401 | if (net_xmit_drop_count(ret)) { |
| 402 | sch->qstats.drops++; |
| 403 | cbq_mark_toplevel(q, cl); |
| 404 | cl->qstats.drops++; |
| 405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | return ret; |
| 407 | } |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | /* Overlimit actions */ |
| 410 | |
| 411 | /* TC_CBQ_OVL_CLASSIC: (default) penalize leaf class by adding offtime */ |
| 412 | |
| 413 | static void cbq_ovl_classic(struct cbq_class *cl) |
| 414 | { |
| 415 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 416 | psched_tdiff_t delay = cl->undertime - q->now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | if (!cl->delayed) { |
| 419 | delay += cl->offtime; |
| 420 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 421 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 422 | * Class goes to sleep, so that it will have no |
| 423 | * chance to work avgidle. Let's forgive it 8) |
| 424 | * |
| 425 | * BTW cbq-2.0 has a crap in this |
| 426 | * place, apparently they forgot to shift it by cl->ewma_log. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | */ |
| 428 | if (cl->avgidle < 0) |
| 429 | delay -= (-cl->avgidle) - ((-cl->avgidle) >> cl->ewma_log); |
| 430 | if (cl->avgidle < cl->minidle) |
| 431 | cl->avgidle = cl->minidle; |
| 432 | if (delay <= 0) |
| 433 | delay = 1; |
Patrick McHardy | 7c59e25 | 2007-03-23 11:27:45 -0700 | [diff] [blame] | 434 | cl->undertime = q->now + delay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | cl->xstats.overactions++; |
| 437 | cl->delayed = 1; |
| 438 | } |
| 439 | if (q->wd_expires == 0 || q->wd_expires > delay) |
| 440 | q->wd_expires = delay; |
| 441 | |
| 442 | /* Dirty work! We must schedule wakeups based on |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 443 | * real available rate, rather than leaf rate, |
| 444 | * which may be tiny (even zero). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | */ |
| 446 | if (q->toplevel == TC_CBQ_MAXLEVEL) { |
| 447 | struct cbq_class *b; |
| 448 | psched_tdiff_t base_delay = q->wd_expires; |
| 449 | |
| 450 | for (b = cl->borrow; b; b = b->borrow) { |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 451 | delay = b->undertime - q->now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (delay < base_delay) { |
| 453 | if (delay <= 0) |
| 454 | delay = 1; |
| 455 | base_delay = delay; |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | q->wd_expires = base_delay; |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | /* TC_CBQ_OVL_RCLASSIC: penalize by offtime classes in hierarchy, when |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 464 | * they go overlimit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | */ |
| 466 | |
| 467 | static void cbq_ovl_rclassic(struct cbq_class *cl) |
| 468 | { |
| 469 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
| 470 | struct cbq_class *this = cl; |
| 471 | |
| 472 | do { |
| 473 | if (cl->level > q->toplevel) { |
| 474 | cl = NULL; |
| 475 | break; |
| 476 | } |
| 477 | } while ((cl = cl->borrow) != NULL); |
| 478 | |
| 479 | if (cl == NULL) |
| 480 | cl = this; |
| 481 | cbq_ovl_classic(cl); |
| 482 | } |
| 483 | |
| 484 | /* TC_CBQ_OVL_DELAY: delay until it will go to underlimit */ |
| 485 | |
| 486 | static void cbq_ovl_delay(struct cbq_class *cl) |
| 487 | { |
| 488 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 489 | psched_tdiff_t delay = cl->undertime - q->now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Jarek Poplawski | 2540e05 | 2008-08-21 05:11:14 -0700 | [diff] [blame] | 491 | if (test_bit(__QDISC_STATE_DEACTIVATED, |
| 492 | &qdisc_root_sleeping(cl->qdisc)->state)) |
| 493 | return; |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | if (!cl->delayed) { |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 496 | psched_time_t sched = q->now; |
| 497 | ktime_t expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
| 499 | delay += cl->offtime; |
| 500 | if (cl->avgidle < 0) |
| 501 | delay -= (-cl->avgidle) - ((-cl->avgidle) >> cl->ewma_log); |
| 502 | if (cl->avgidle < cl->minidle) |
| 503 | cl->avgidle = cl->minidle; |
Patrick McHardy | 7c59e25 | 2007-03-23 11:27:45 -0700 | [diff] [blame] | 504 | cl->undertime = q->now + delay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | if (delay > 0) { |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 507 | sched += delay + cl->penalty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | cl->penalized = sched; |
| 509 | cl->cpriority = TC_CBQ_MAXPRIO; |
| 510 | q->pmask |= (1<<TC_CBQ_MAXPRIO); |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 511 | |
Eric Dumazet | 46baac3 | 2012-10-20 00:40:51 +0000 | [diff] [blame] | 512 | expires = ns_to_ktime(PSCHED_TICKS2NS(sched)); |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 513 | if (hrtimer_try_to_cancel(&q->delay_timer) && |
| 514 | ktime_to_ns(ktime_sub( |
| 515 | hrtimer_get_expires(&q->delay_timer), |
| 516 | expires)) > 0) |
| 517 | hrtimer_set_expires(&q->delay_timer, expires); |
| 518 | hrtimer_restart(&q->delay_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | cl->delayed = 1; |
| 520 | cl->xstats.overactions++; |
| 521 | return; |
| 522 | } |
| 523 | delay = 1; |
| 524 | } |
| 525 | if (q->wd_expires == 0 || q->wd_expires > delay) |
| 526 | q->wd_expires = delay; |
| 527 | } |
| 528 | |
| 529 | /* TC_CBQ_OVL_LOWPRIO: penalize class by lowering its priority band */ |
| 530 | |
| 531 | static void cbq_ovl_lowprio(struct cbq_class *cl) |
| 532 | { |
| 533 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
| 534 | |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 535 | cl->penalized = q->now + cl->penalty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
| 537 | if (cl->cpriority != cl->priority2) { |
| 538 | cl->cpriority = cl->priority2; |
| 539 | q->pmask |= (1<<cl->cpriority); |
| 540 | cl->xstats.overactions++; |
| 541 | } |
| 542 | cbq_ovl_classic(cl); |
| 543 | } |
| 544 | |
| 545 | /* TC_CBQ_OVL_DROP: penalize class by dropping */ |
| 546 | |
| 547 | static void cbq_ovl_drop(struct cbq_class *cl) |
| 548 | { |
| 549 | if (cl->q->ops->drop) |
| 550 | if (cl->q->ops->drop(cl->q)) |
| 551 | cl->qdisc->q.qlen--; |
| 552 | cl->xstats.overactions++; |
| 553 | cbq_ovl_classic(cl); |
| 554 | } |
| 555 | |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 556 | static psched_tdiff_t cbq_undelay_prio(struct cbq_sched_data *q, int prio, |
| 557 | psched_time_t now) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | { |
| 559 | struct cbq_class *cl; |
| 560 | struct cbq_class *cl_prev = q->active[prio]; |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 561 | psched_time_t sched = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | if (cl_prev == NULL) |
Patrick McHardy | e9054a3 | 2007-03-16 01:21:40 -0700 | [diff] [blame] | 564 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | do { |
| 567 | cl = cl_prev->next_alive; |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 568 | if (now - cl->penalized > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | cl_prev->next_alive = cl->next_alive; |
| 570 | cl->next_alive = NULL; |
| 571 | cl->cpriority = cl->priority; |
| 572 | cl->delayed = 0; |
| 573 | cbq_activate_class(cl); |
| 574 | |
| 575 | if (cl == q->active[prio]) { |
| 576 | q->active[prio] = cl_prev; |
| 577 | if (cl == q->active[prio]) { |
| 578 | q->active[prio] = NULL; |
| 579 | return 0; |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | cl = cl_prev->next_alive; |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 584 | } else if (sched - cl->penalized > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | sched = cl->penalized; |
| 586 | } while ((cl_prev = cl) != q->active[prio]); |
| 587 | |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 588 | return sched - now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 591 | static enum hrtimer_restart cbq_undelay(struct hrtimer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | { |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 593 | struct cbq_sched_data *q = container_of(timer, struct cbq_sched_data, |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 594 | delay_timer); |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 595 | struct Qdisc *sch = q->watchdog.qdisc; |
| 596 | psched_time_t now; |
| 597 | psched_tdiff_t delay = 0; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 598 | unsigned int pmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 600 | now = psched_get_time(); |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 601 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | pmask = q->pmask; |
| 603 | q->pmask = 0; |
| 604 | |
| 605 | while (pmask) { |
| 606 | int prio = ffz(~pmask); |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 607 | psched_tdiff_t tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
| 609 | pmask &= ~(1<<prio); |
| 610 | |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 611 | tmp = cbq_undelay_prio(q, prio, now); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | if (tmp > 0) { |
| 613 | q->pmask |= 1<<prio; |
| 614 | if (tmp < delay || delay == 0) |
| 615 | delay = tmp; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | if (delay) { |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 620 | ktime_t time; |
| 621 | |
| 622 | time = ktime_set(0, 0); |
Jarek Poplawski | ca44d6e | 2009-06-15 02:31:47 -0700 | [diff] [blame] | 623 | time = ktime_add_ns(time, PSCHED_TICKS2NS(now + delay)); |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 624 | hrtimer_start(&q->delay_timer, time, HRTIMER_MODE_ABS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | } |
| 626 | |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 627 | qdisc_unthrottled(sch); |
David S. Miller | 8608db0 | 2008-08-18 20:51:18 -0700 | [diff] [blame] | 628 | __netif_schedule(qdisc_root(sch)); |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 629 | return HRTIMER_NORESTART; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | } |
| 631 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 632 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | static int cbq_reshape_fail(struct sk_buff *skb, struct Qdisc *child) |
| 634 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | struct Qdisc *sch = child->__parent; |
| 636 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 637 | struct cbq_class *cl = q->rx_class; |
| 638 | |
| 639 | q->rx_class = NULL; |
| 640 | |
| 641 | if (cl && (cl = cbq_reclassify(skb, cl)) != NULL) { |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 642 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
| 644 | cbq_mark_toplevel(q, cl); |
| 645 | |
| 646 | q->rx_class = cl; |
| 647 | cl->q->__parent = sch; |
| 648 | |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 649 | ret = qdisc_enqueue(skb, cl->q); |
| 650 | if (ret == NET_XMIT_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | sch->q.qlen++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | if (!cl->next_alive) |
| 653 | cbq_activate_class(cl); |
| 654 | return 0; |
| 655 | } |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 656 | if (net_xmit_drop_count(ret)) |
| 657 | sch->qstats.drops++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | return 0; |
| 659 | } |
| 660 | |
| 661 | sch->qstats.drops++; |
| 662 | return -1; |
| 663 | } |
| 664 | #endif |
| 665 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 666 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 667 | * It is mission critical procedure. |
| 668 | * |
| 669 | * We "regenerate" toplevel cutoff, if transmitting class |
| 670 | * has backlog and it is not regulated. It is not part of |
| 671 | * original CBQ description, but looks more reasonable. |
| 672 | * Probably, it is wrong. This question needs further investigation. |
| 673 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 675 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | cbq_update_toplevel(struct cbq_sched_data *q, struct cbq_class *cl, |
| 677 | struct cbq_class *borrowed) |
| 678 | { |
| 679 | if (cl && q->toplevel >= borrowed->level) { |
| 680 | if (cl->q->q.qlen > 1) { |
| 681 | do { |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 682 | if (borrowed->undertime == PSCHED_PASTPERFECT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | q->toplevel = borrowed->level; |
| 684 | return; |
| 685 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 686 | } while ((borrowed = borrowed->borrow) != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | } |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 688 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | /* It is not necessary now. Uncommenting it |
| 690 | will save CPU cycles, but decrease fairness. |
| 691 | */ |
| 692 | q->toplevel = TC_CBQ_MAXLEVEL; |
| 693 | #endif |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | static void |
| 698 | cbq_update(struct cbq_sched_data *q) |
| 699 | { |
| 700 | struct cbq_class *this = q->tx_class; |
| 701 | struct cbq_class *cl = this; |
| 702 | int len = q->tx_len; |
| 703 | |
| 704 | q->tx_class = NULL; |
| 705 | |
| 706 | for ( ; cl; cl = cl->share) { |
| 707 | long avgidle = cl->avgidle; |
| 708 | long idle; |
| 709 | |
| 710 | cl->bstats.packets++; |
| 711 | cl->bstats.bytes += len; |
| 712 | |
| 713 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 714 | * (now - last) is total time between packet right edges. |
| 715 | * (last_pktlen/rate) is "virtual" busy time, so that |
| 716 | * |
| 717 | * idle = (now - last) - last_pktlen/rate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | */ |
| 719 | |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 720 | idle = q->now - cl->last; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if ((unsigned long)idle > 128*1024*1024) { |
| 722 | avgidle = cl->maxidle; |
| 723 | } else { |
| 724 | idle -= L2T(cl, len); |
| 725 | |
| 726 | /* true_avgidle := (1-W)*true_avgidle + W*idle, |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 727 | * where W=2^{-ewma_log}. But cl->avgidle is scaled: |
| 728 | * cl->avgidle == true_avgidle/W, |
| 729 | * hence: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | */ |
| 731 | avgidle += idle - (avgidle>>cl->ewma_log); |
| 732 | } |
| 733 | |
| 734 | if (avgidle <= 0) { |
| 735 | /* Overlimit or at-limit */ |
| 736 | |
| 737 | if (avgidle < cl->minidle) |
| 738 | avgidle = cl->minidle; |
| 739 | |
| 740 | cl->avgidle = avgidle; |
| 741 | |
| 742 | /* Calculate expected time, when this class |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 743 | * will be allowed to send. |
| 744 | * It will occur, when: |
| 745 | * (1-W)*true_avgidle + W*delay = 0, i.e. |
| 746 | * idle = (1/W - 1)*(-true_avgidle) |
| 747 | * or |
| 748 | * idle = (1 - W)*(-cl->avgidle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | */ |
| 750 | idle = (-avgidle) - ((-avgidle) >> cl->ewma_log); |
| 751 | |
| 752 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 753 | * That is not all. |
| 754 | * To maintain the rate allocated to the class, |
| 755 | * we add to undertime virtual clock, |
| 756 | * necessary to complete transmitted packet. |
| 757 | * (len/phys_bandwidth has been already passed |
| 758 | * to the moment of cbq_update) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | */ |
| 760 | |
| 761 | idle -= L2T(&q->link, len); |
| 762 | idle += L2T(cl, len); |
| 763 | |
Patrick McHardy | 7c59e25 | 2007-03-23 11:27:45 -0700 | [diff] [blame] | 764 | cl->undertime = q->now + idle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | } else { |
| 766 | /* Underlimit */ |
| 767 | |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 768 | cl->undertime = PSCHED_PASTPERFECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | if (avgidle > cl->maxidle) |
| 770 | cl->avgidle = cl->maxidle; |
| 771 | else |
| 772 | cl->avgidle = avgidle; |
| 773 | } |
| 774 | cl->last = q->now; |
| 775 | } |
| 776 | |
| 777 | cbq_update_toplevel(q, this, q->tx_borrowed); |
| 778 | } |
| 779 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 780 | static inline struct cbq_class * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | cbq_under_limit(struct cbq_class *cl) |
| 782 | { |
| 783 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
| 784 | struct cbq_class *this_cl = cl; |
| 785 | |
| 786 | if (cl->tparent == NULL) |
| 787 | return cl; |
| 788 | |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 789 | if (cl->undertime == PSCHED_PASTPERFECT || q->now >= cl->undertime) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | cl->delayed = 0; |
| 791 | return cl; |
| 792 | } |
| 793 | |
| 794 | do { |
| 795 | /* It is very suspicious place. Now overlimit |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 796 | * action is generated for not bounded classes |
| 797 | * only if link is completely congested. |
| 798 | * Though it is in agree with ancestor-only paradigm, |
| 799 | * it looks very stupid. Particularly, |
| 800 | * it means that this chunk of code will either |
| 801 | * never be called or result in strong amplification |
| 802 | * of burstiness. Dangerous, silly, and, however, |
| 803 | * no another solution exists. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 805 | cl = cl->borrow; |
| 806 | if (!cl) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | this_cl->qstats.overlimits++; |
| 808 | this_cl->overlimit(this_cl); |
| 809 | return NULL; |
| 810 | } |
| 811 | if (cl->level > q->toplevel) |
| 812 | return NULL; |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 813 | } while (cl->undertime != PSCHED_PASTPERFECT && q->now < cl->undertime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | |
| 815 | cl->delayed = 0; |
| 816 | return cl; |
| 817 | } |
| 818 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 819 | static inline struct sk_buff * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | cbq_dequeue_prio(struct Qdisc *sch, int prio) |
| 821 | { |
| 822 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 823 | struct cbq_class *cl_tail, *cl_prev, *cl; |
| 824 | struct sk_buff *skb; |
| 825 | int deficit; |
| 826 | |
| 827 | cl_tail = cl_prev = q->active[prio]; |
| 828 | cl = cl_prev->next_alive; |
| 829 | |
| 830 | do { |
| 831 | deficit = 0; |
| 832 | |
| 833 | /* Start round */ |
| 834 | do { |
| 835 | struct cbq_class *borrow = cl; |
| 836 | |
| 837 | if (cl->q->q.qlen && |
| 838 | (borrow = cbq_under_limit(cl)) == NULL) |
| 839 | goto skip_class; |
| 840 | |
| 841 | if (cl->deficit <= 0) { |
| 842 | /* Class exhausted its allotment per |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 843 | * this round. Switch to the next one. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | */ |
| 845 | deficit = 1; |
| 846 | cl->deficit += cl->quantum; |
| 847 | goto next_class; |
| 848 | } |
| 849 | |
| 850 | skb = cl->q->dequeue(cl->q); |
| 851 | |
| 852 | /* Class did not give us any skb :-( |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 853 | * It could occur even if cl->q->q.qlen != 0 |
| 854 | * f.e. if cl->q == "tbf" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | */ |
| 856 | if (skb == NULL) |
| 857 | goto skip_class; |
| 858 | |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 859 | cl->deficit -= qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | q->tx_class = cl; |
| 861 | q->tx_borrowed = borrow; |
| 862 | if (borrow != cl) { |
| 863 | #ifndef CBQ_XSTATS_BORROWS_BYTES |
| 864 | borrow->xstats.borrows++; |
| 865 | cl->xstats.borrows++; |
| 866 | #else |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 867 | borrow->xstats.borrows += qdisc_pkt_len(skb); |
| 868 | cl->xstats.borrows += qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | #endif |
| 870 | } |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 871 | q->tx_len = qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | if (cl->deficit <= 0) { |
| 874 | q->active[prio] = cl; |
| 875 | cl = cl->next_alive; |
| 876 | cl->deficit += cl->quantum; |
| 877 | } |
| 878 | return skb; |
| 879 | |
| 880 | skip_class: |
| 881 | if (cl->q->q.qlen == 0 || prio != cl->cpriority) { |
| 882 | /* Class is empty or penalized. |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 883 | * Unlink it from active chain. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | */ |
| 885 | cl_prev->next_alive = cl->next_alive; |
| 886 | cl->next_alive = NULL; |
| 887 | |
| 888 | /* Did cl_tail point to it? */ |
| 889 | if (cl == cl_tail) { |
| 890 | /* Repair it! */ |
| 891 | cl_tail = cl_prev; |
| 892 | |
| 893 | /* Was it the last class in this band? */ |
| 894 | if (cl == cl_tail) { |
| 895 | /* Kill the band! */ |
| 896 | q->active[prio] = NULL; |
| 897 | q->activemask &= ~(1<<prio); |
| 898 | if (cl->q->q.qlen) |
| 899 | cbq_activate_class(cl); |
| 900 | return NULL; |
| 901 | } |
| 902 | |
| 903 | q->active[prio] = cl_tail; |
| 904 | } |
| 905 | if (cl->q->q.qlen) |
| 906 | cbq_activate_class(cl); |
| 907 | |
| 908 | cl = cl_prev; |
| 909 | } |
| 910 | |
| 911 | next_class: |
| 912 | cl_prev = cl; |
| 913 | cl = cl->next_alive; |
| 914 | } while (cl_prev != cl_tail); |
| 915 | } while (deficit); |
| 916 | |
| 917 | q->active[prio] = cl_prev; |
| 918 | |
| 919 | return NULL; |
| 920 | } |
| 921 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 922 | static inline struct sk_buff * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | cbq_dequeue_1(struct Qdisc *sch) |
| 924 | { |
| 925 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 926 | struct sk_buff *skb; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 927 | unsigned int activemask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 929 | activemask = q->activemask & 0xFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | while (activemask) { |
| 931 | int prio = ffz(~activemask); |
| 932 | activemask &= ~(1<<prio); |
| 933 | skb = cbq_dequeue_prio(sch, prio); |
| 934 | if (skb) |
| 935 | return skb; |
| 936 | } |
| 937 | return NULL; |
| 938 | } |
| 939 | |
| 940 | static struct sk_buff * |
| 941 | cbq_dequeue(struct Qdisc *sch) |
| 942 | { |
| 943 | struct sk_buff *skb; |
| 944 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 945 | psched_time_t now; |
| 946 | psched_tdiff_t incr; |
| 947 | |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 948 | now = psched_get_time(); |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 949 | incr = now - q->now_rt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
| 951 | if (q->tx_class) { |
| 952 | psched_tdiff_t incr2; |
| 953 | /* Time integrator. We calculate EOS time |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 954 | * by adding expected packet transmission time. |
| 955 | * If real time is greater, we warp artificial clock, |
| 956 | * so that: |
| 957 | * |
| 958 | * cbq_time = max(real_time, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | */ |
| 960 | incr2 = L2T(&q->link, q->tx_len); |
Patrick McHardy | 7c59e25 | 2007-03-23 11:27:45 -0700 | [diff] [blame] | 961 | q->now += incr2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | cbq_update(q); |
| 963 | if ((incr -= incr2) < 0) |
| 964 | incr = 0; |
| 965 | } |
Patrick McHardy | 7c59e25 | 2007-03-23 11:27:45 -0700 | [diff] [blame] | 966 | q->now += incr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | q->now_rt = now; |
| 968 | |
| 969 | for (;;) { |
| 970 | q->wd_expires = 0; |
| 971 | |
| 972 | skb = cbq_dequeue_1(sch); |
| 973 | if (skb) { |
Eric Dumazet | 9190b3b | 2011-01-20 23:31:33 -0800 | [diff] [blame] | 974 | qdisc_bstats_update(sch, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | sch->q.qlen--; |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 976 | qdisc_unthrottled(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | return skb; |
| 978 | } |
| 979 | |
| 980 | /* All the classes are overlimit. |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 981 | * |
| 982 | * It is possible, if: |
| 983 | * |
| 984 | * 1. Scheduler is empty. |
| 985 | * 2. Toplevel cutoff inhibited borrowing. |
| 986 | * 3. Root class is overlimit. |
| 987 | * |
| 988 | * Reset 2d and 3d conditions and retry. |
| 989 | * |
| 990 | * Note, that NS and cbq-2.0 are buggy, peeking |
| 991 | * an arbitrary class is appropriate for ancestor-only |
| 992 | * sharing, but not for toplevel algorithm. |
| 993 | * |
| 994 | * Our version is better, but slower, because it requires |
| 995 | * two passes, but it is unavoidable with top-level sharing. |
| 996 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
| 998 | if (q->toplevel == TC_CBQ_MAXLEVEL && |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 999 | q->link.undertime == PSCHED_PASTPERFECT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | break; |
| 1001 | |
| 1002 | q->toplevel = TC_CBQ_MAXLEVEL; |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 1003 | q->link.undertime = PSCHED_PASTPERFECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | /* No packets in scheduler or nobody wants to give them to us :-( |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1007 | * Sigh... start watchdog timer in the last case. |
| 1008 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | if (sch->q.qlen) { |
| 1011 | sch->qstats.overlimits++; |
Patrick McHardy | 88a9935 | 2007-03-16 01:21:11 -0700 | [diff] [blame] | 1012 | if (q->wd_expires) |
| 1013 | qdisc_watchdog_schedule(&q->watchdog, |
Patrick McHardy | bb239ac | 2007-03-16 12:31:28 -0700 | [diff] [blame] | 1014 | now + q->wd_expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | } |
| 1016 | return NULL; |
| 1017 | } |
| 1018 | |
| 1019 | /* CBQ class maintanance routines */ |
| 1020 | |
| 1021 | static void cbq_adjust_levels(struct cbq_class *this) |
| 1022 | { |
| 1023 | if (this == NULL) |
| 1024 | return; |
| 1025 | |
| 1026 | do { |
| 1027 | int level = 0; |
| 1028 | struct cbq_class *cl; |
| 1029 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1030 | cl = this->children; |
| 1031 | if (cl) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | do { |
| 1033 | if (cl->level > level) |
| 1034 | level = cl->level; |
| 1035 | } while ((cl = cl->sibling) != this->children); |
| 1036 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1037 | this->level = level + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } while ((this = this->tparent) != NULL); |
| 1039 | } |
| 1040 | |
| 1041 | static void cbq_normalize_quanta(struct cbq_sched_data *q, int prio) |
| 1042 | { |
| 1043 | struct cbq_class *cl; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1044 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | |
| 1046 | if (q->quanta[prio] == 0) |
| 1047 | return; |
| 1048 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1049 | for (h = 0; h < q->clhash.hashsize; h++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 1050 | hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | /* BUGGGG... Beware! This expression suffer of |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1052 | * arithmetic overflows! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | */ |
| 1054 | if (cl->priority == prio) { |
| 1055 | cl->quantum = (cl->weight*cl->allot*q->nclasses[prio])/ |
| 1056 | q->quanta[prio]; |
| 1057 | } |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 1058 | if (cl->quantum <= 0 || cl->quantum>32*qdisc_dev(cl->qdisc)->mtu) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1059 | pr_warning("CBQ: class %08x has bad quantum==%ld, repaired.\n", |
| 1060 | cl->common.classid, cl->quantum); |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 1061 | cl->quantum = qdisc_dev(cl->qdisc)->mtu/2 + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | } |
| 1063 | } |
| 1064 | } |
| 1065 | } |
| 1066 | |
| 1067 | static void cbq_sync_defmap(struct cbq_class *cl) |
| 1068 | { |
| 1069 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
| 1070 | struct cbq_class *split = cl->split; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1071 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | int i; |
| 1073 | |
| 1074 | if (split == NULL) |
| 1075 | return; |
| 1076 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1077 | for (i = 0; i <= TC_PRIO_MAX; i++) { |
| 1078 | if (split->defaults[i] == cl && !(cl->defmap & (1<<i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | split->defaults[i] = NULL; |
| 1080 | } |
| 1081 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1082 | for (i = 0; i <= TC_PRIO_MAX; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | int level = split->level; |
| 1084 | |
| 1085 | if (split->defaults[i]) |
| 1086 | continue; |
| 1087 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1088 | for (h = 0; h < q->clhash.hashsize; h++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | struct cbq_class *c; |
| 1090 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 1091 | hlist_for_each_entry(c, &q->clhash.hash[h], |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1092 | common.hnode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | if (c->split == split && c->level < level && |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1094 | c->defmap & (1<<i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | split->defaults[i] = c; |
| 1096 | level = c->level; |
| 1097 | } |
| 1098 | } |
| 1099 | } |
| 1100 | } |
| 1101 | } |
| 1102 | |
| 1103 | static void cbq_change_defmap(struct cbq_class *cl, u32 splitid, u32 def, u32 mask) |
| 1104 | { |
| 1105 | struct cbq_class *split = NULL; |
| 1106 | |
| 1107 | if (splitid == 0) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1108 | split = cl->split; |
| 1109 | if (!split) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | return; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1111 | splitid = split->common.classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | } |
| 1113 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1114 | if (split == NULL || split->common.classid != splitid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | for (split = cl->tparent; split; split = split->tparent) |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1116 | if (split->common.classid == splitid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | break; |
| 1118 | } |
| 1119 | |
| 1120 | if (split == NULL) |
| 1121 | return; |
| 1122 | |
| 1123 | if (cl->split != split) { |
| 1124 | cl->defmap = 0; |
| 1125 | cbq_sync_defmap(cl); |
| 1126 | cl->split = split; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1127 | cl->defmap = def & mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | } else |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1129 | cl->defmap = (cl->defmap & ~mask) | (def & mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | |
| 1131 | cbq_sync_defmap(cl); |
| 1132 | } |
| 1133 | |
| 1134 | static void cbq_unlink_class(struct cbq_class *this) |
| 1135 | { |
| 1136 | struct cbq_class *cl, **clp; |
| 1137 | struct cbq_sched_data *q = qdisc_priv(this->qdisc); |
| 1138 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1139 | qdisc_class_hash_remove(&q->clhash, &this->common); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
| 1141 | if (this->tparent) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1142 | clp = &this->sibling; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | cl = *clp; |
| 1144 | do { |
| 1145 | if (cl == this) { |
| 1146 | *clp = cl->sibling; |
| 1147 | break; |
| 1148 | } |
| 1149 | clp = &cl->sibling; |
| 1150 | } while ((cl = *clp) != this->sibling); |
| 1151 | |
| 1152 | if (this->tparent->children == this) { |
| 1153 | this->tparent->children = this->sibling; |
| 1154 | if (this->sibling == this) |
| 1155 | this->tparent->children = NULL; |
| 1156 | } |
| 1157 | } else { |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 1158 | WARN_ON(this->sibling != this); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | static void cbq_link_class(struct cbq_class *this) |
| 1163 | { |
| 1164 | struct cbq_sched_data *q = qdisc_priv(this->qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | struct cbq_class *parent = this->tparent; |
| 1166 | |
| 1167 | this->sibling = this; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1168 | qdisc_class_hash_insert(&q->clhash, &this->common); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | |
| 1170 | if (parent == NULL) |
| 1171 | return; |
| 1172 | |
| 1173 | if (parent->children == NULL) { |
| 1174 | parent->children = this; |
| 1175 | } else { |
| 1176 | this->sibling = parent->children->sibling; |
| 1177 | parent->children->sibling = this; |
| 1178 | } |
| 1179 | } |
| 1180 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1181 | static unsigned int cbq_drop(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | { |
| 1183 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1184 | struct cbq_class *cl, *cl_head; |
| 1185 | int prio; |
| 1186 | unsigned int len; |
| 1187 | |
| 1188 | for (prio = TC_CBQ_MAXPRIO; prio >= 0; prio--) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1189 | cl_head = q->active[prio]; |
| 1190 | if (!cl_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | continue; |
| 1192 | |
| 1193 | cl = cl_head; |
| 1194 | do { |
| 1195 | if (cl->q->ops->drop && (len = cl->q->ops->drop(cl->q))) { |
| 1196 | sch->q.qlen--; |
Jarek Poplawski | a37ef2e | 2006-12-08 00:25:55 -0800 | [diff] [blame] | 1197 | if (!cl->q->q.qlen) |
| 1198 | cbq_deactivate_class(cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | return len; |
| 1200 | } |
| 1201 | } while ((cl = cl->next_alive) != cl_head); |
| 1202 | } |
| 1203 | return 0; |
| 1204 | } |
| 1205 | |
| 1206 | static void |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1207 | cbq_reset(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | { |
| 1209 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1210 | struct cbq_class *cl; |
| 1211 | int prio; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1212 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | |
| 1214 | q->activemask = 0; |
| 1215 | q->pmask = 0; |
| 1216 | q->tx_class = NULL; |
| 1217 | q->tx_borrowed = NULL; |
Patrick McHardy | 88a9935 | 2007-03-16 01:21:11 -0700 | [diff] [blame] | 1218 | qdisc_watchdog_cancel(&q->watchdog); |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 1219 | hrtimer_cancel(&q->delay_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | q->toplevel = TC_CBQ_MAXLEVEL; |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 1221 | q->now = psched_get_time(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | q->now_rt = q->now; |
| 1223 | |
| 1224 | for (prio = 0; prio <= TC_CBQ_MAXPRIO; prio++) |
| 1225 | q->active[prio] = NULL; |
| 1226 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1227 | for (h = 0; h < q->clhash.hashsize; h++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 1228 | hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | qdisc_reset(cl->q); |
| 1230 | |
| 1231 | cl->next_alive = NULL; |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 1232 | cl->undertime = PSCHED_PASTPERFECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | cl->avgidle = cl->maxidle; |
| 1234 | cl->deficit = cl->quantum; |
| 1235 | cl->cpriority = cl->priority; |
| 1236 | } |
| 1237 | } |
| 1238 | sch->q.qlen = 0; |
| 1239 | } |
| 1240 | |
| 1241 | |
| 1242 | static int cbq_set_lss(struct cbq_class *cl, struct tc_cbq_lssopt *lss) |
| 1243 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1244 | if (lss->change & TCF_CBQ_LSS_FLAGS) { |
| 1245 | cl->share = (lss->flags & TCF_CBQ_LSS_ISOLATED) ? NULL : cl->tparent; |
| 1246 | cl->borrow = (lss->flags & TCF_CBQ_LSS_BOUNDED) ? NULL : cl->tparent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1248 | if (lss->change & TCF_CBQ_LSS_EWMA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | cl->ewma_log = lss->ewma_log; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1250 | if (lss->change & TCF_CBQ_LSS_AVPKT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | cl->avpkt = lss->avpkt; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1252 | if (lss->change & TCF_CBQ_LSS_MINIDLE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | cl->minidle = -(long)lss->minidle; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1254 | if (lss->change & TCF_CBQ_LSS_MAXIDLE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | cl->maxidle = lss->maxidle; |
| 1256 | cl->avgidle = lss->maxidle; |
| 1257 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1258 | if (lss->change & TCF_CBQ_LSS_OFFTIME) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | cl->offtime = lss->offtime; |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | static void cbq_rmprio(struct cbq_sched_data *q, struct cbq_class *cl) |
| 1264 | { |
| 1265 | q->nclasses[cl->priority]--; |
| 1266 | q->quanta[cl->priority] -= cl->weight; |
| 1267 | cbq_normalize_quanta(q, cl->priority); |
| 1268 | } |
| 1269 | |
| 1270 | static void cbq_addprio(struct cbq_sched_data *q, struct cbq_class *cl) |
| 1271 | { |
| 1272 | q->nclasses[cl->priority]++; |
| 1273 | q->quanta[cl->priority] += cl->weight; |
| 1274 | cbq_normalize_quanta(q, cl->priority); |
| 1275 | } |
| 1276 | |
| 1277 | static int cbq_set_wrr(struct cbq_class *cl, struct tc_cbq_wrropt *wrr) |
| 1278 | { |
| 1279 | struct cbq_sched_data *q = qdisc_priv(cl->qdisc); |
| 1280 | |
| 1281 | if (wrr->allot) |
| 1282 | cl->allot = wrr->allot; |
| 1283 | if (wrr->weight) |
| 1284 | cl->weight = wrr->weight; |
| 1285 | if (wrr->priority) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1286 | cl->priority = wrr->priority - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | cl->cpriority = cl->priority; |
| 1288 | if (cl->priority >= cl->priority2) |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1289 | cl->priority2 = TC_CBQ_MAXPRIO - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | cbq_addprio(q, cl); |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
| 1296 | static int cbq_set_overlimit(struct cbq_class *cl, struct tc_cbq_ovl *ovl) |
| 1297 | { |
| 1298 | switch (ovl->strategy) { |
| 1299 | case TC_CBQ_OVL_CLASSIC: |
| 1300 | cl->overlimit = cbq_ovl_classic; |
| 1301 | break; |
| 1302 | case TC_CBQ_OVL_DELAY: |
| 1303 | cl->overlimit = cbq_ovl_delay; |
| 1304 | break; |
| 1305 | case TC_CBQ_OVL_LOWPRIO: |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1306 | if (ovl->priority2 - 1 >= TC_CBQ_MAXPRIO || |
| 1307 | ovl->priority2 - 1 <= cl->priority) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | return -EINVAL; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1309 | cl->priority2 = ovl->priority2 - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | cl->overlimit = cbq_ovl_lowprio; |
| 1311 | break; |
| 1312 | case TC_CBQ_OVL_DROP: |
| 1313 | cl->overlimit = cbq_ovl_drop; |
| 1314 | break; |
| 1315 | case TC_CBQ_OVL_RCLASSIC: |
| 1316 | cl->overlimit = cbq_ovl_rclassic; |
| 1317 | break; |
| 1318 | default: |
| 1319 | return -EINVAL; |
| 1320 | } |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 1321 | cl->penalty = ovl->penalty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | return 0; |
| 1323 | } |
| 1324 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1325 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | static int cbq_set_police(struct cbq_class *cl, struct tc_cbq_police *p) |
| 1327 | { |
| 1328 | cl->police = p->police; |
| 1329 | |
| 1330 | if (cl->q->handle) { |
| 1331 | if (p->police == TC_POLICE_RECLASSIFY) |
| 1332 | cl->q->reshape_fail = cbq_reshape_fail; |
| 1333 | else |
| 1334 | cl->q->reshape_fail = NULL; |
| 1335 | } |
| 1336 | return 0; |
| 1337 | } |
| 1338 | #endif |
| 1339 | |
| 1340 | static int cbq_set_fopt(struct cbq_class *cl, struct tc_cbq_fopt *fopt) |
| 1341 | { |
| 1342 | cbq_change_defmap(cl, fopt->split, fopt->defmap, fopt->defchange); |
| 1343 | return 0; |
| 1344 | } |
| 1345 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 1346 | static const struct nla_policy cbq_policy[TCA_CBQ_MAX + 1] = { |
| 1347 | [TCA_CBQ_LSSOPT] = { .len = sizeof(struct tc_cbq_lssopt) }, |
| 1348 | [TCA_CBQ_WRROPT] = { .len = sizeof(struct tc_cbq_wrropt) }, |
| 1349 | [TCA_CBQ_FOPT] = { .len = sizeof(struct tc_cbq_fopt) }, |
| 1350 | [TCA_CBQ_OVL_STRATEGY] = { .len = sizeof(struct tc_cbq_ovl) }, |
| 1351 | [TCA_CBQ_RATE] = { .len = sizeof(struct tc_ratespec) }, |
| 1352 | [TCA_CBQ_RTAB] = { .type = NLA_BINARY, .len = TC_RTAB_SIZE }, |
| 1353 | [TCA_CBQ_POLICE] = { .len = sizeof(struct tc_cbq_police) }, |
| 1354 | }; |
| 1355 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1356 | static int cbq_init(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | { |
| 1358 | struct cbq_sched_data *q = qdisc_priv(sch); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1359 | struct nlattr *tb[TCA_CBQ_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | struct tc_ratespec *r; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 1361 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 1363 | err = nla_parse_nested(tb, TCA_CBQ_MAX, opt, cbq_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 1364 | if (err < 0) |
| 1365 | return err; |
| 1366 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 1367 | if (tb[TCA_CBQ_RTAB] == NULL || tb[TCA_CBQ_RATE] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | return -EINVAL; |
| 1369 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1370 | r = nla_data(tb[TCA_CBQ_RATE]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1372 | if ((q->link.R_tab = qdisc_get_rtab(r, tb[TCA_CBQ_RTAB])) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | return -EINVAL; |
| 1374 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1375 | err = qdisc_class_hash_init(&q->clhash); |
| 1376 | if (err < 0) |
| 1377 | goto put_rtab; |
| 1378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | q->link.refcnt = 1; |
| 1380 | q->link.sibling = &q->link; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1381 | q->link.common.classid = sch->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | q->link.qdisc = sch; |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 1383 | q->link.q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, |
| 1384 | sch->handle); |
| 1385 | if (!q->link.q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | q->link.q = &noop_qdisc; |
| 1387 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1388 | q->link.priority = TC_CBQ_MAXPRIO - 1; |
| 1389 | q->link.priority2 = TC_CBQ_MAXPRIO - 1; |
| 1390 | q->link.cpriority = TC_CBQ_MAXPRIO - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | q->link.ovl_strategy = TC_CBQ_OVL_CLASSIC; |
| 1392 | q->link.overlimit = cbq_ovl_classic; |
David S. Miller | 5ce2d48 | 2008-07-08 17:06:30 -0700 | [diff] [blame] | 1393 | q->link.allot = psched_mtu(qdisc_dev(sch)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | q->link.quantum = q->link.allot; |
| 1395 | q->link.weight = q->link.R_tab->rate.rate; |
| 1396 | |
| 1397 | q->link.ewma_log = TC_CBQ_DEF_EWMA; |
| 1398 | q->link.avpkt = q->link.allot/2; |
| 1399 | q->link.minidle = -0x7FFFFFFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
Patrick McHardy | 88a9935 | 2007-03-16 01:21:11 -0700 | [diff] [blame] | 1401 | qdisc_watchdog_init(&q->watchdog, sch); |
David S. Miller | 2fbd3da | 2009-09-01 17:59:25 -0700 | [diff] [blame] | 1402 | hrtimer_init(&q->delay_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | q->delay_timer.function = cbq_undelay; |
| 1404 | q->toplevel = TC_CBQ_MAXLEVEL; |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 1405 | q->now = psched_get_time(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | q->now_rt = q->now; |
| 1407 | |
| 1408 | cbq_link_class(&q->link); |
| 1409 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1410 | if (tb[TCA_CBQ_LSSOPT]) |
| 1411 | cbq_set_lss(&q->link, nla_data(tb[TCA_CBQ_LSSOPT])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | |
| 1413 | cbq_addprio(q, &q->link); |
| 1414 | return 0; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1415 | |
| 1416 | put_rtab: |
| 1417 | qdisc_put_rtab(q->link.R_tab); |
| 1418 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | } |
| 1420 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1421 | static int cbq_dump_rate(struct sk_buff *skb, struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1423 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1425 | if (nla_put(skb, TCA_CBQ_RATE, sizeof(cl->R_tab->rate), &cl->R_tab->rate)) |
| 1426 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | return skb->len; |
| 1428 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1429 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1430 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | return -1; |
| 1432 | } |
| 1433 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1434 | static int cbq_dump_lss(struct sk_buff *skb, struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1436 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | struct tc_cbq_lssopt opt; |
| 1438 | |
| 1439 | opt.flags = 0; |
| 1440 | if (cl->borrow == NULL) |
| 1441 | opt.flags |= TCF_CBQ_LSS_BOUNDED; |
| 1442 | if (cl->share == NULL) |
| 1443 | opt.flags |= TCF_CBQ_LSS_ISOLATED; |
| 1444 | opt.ewma_log = cl->ewma_log; |
| 1445 | opt.level = cl->level; |
| 1446 | opt.avpkt = cl->avpkt; |
| 1447 | opt.maxidle = cl->maxidle; |
| 1448 | opt.minidle = (u32)(-cl->minidle); |
| 1449 | opt.offtime = cl->offtime; |
| 1450 | opt.change = ~0; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1451 | if (nla_put(skb, TCA_CBQ_LSSOPT, sizeof(opt), &opt)) |
| 1452 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | return skb->len; |
| 1454 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1455 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1456 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | return -1; |
| 1458 | } |
| 1459 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1460 | static int cbq_dump_wrr(struct sk_buff *skb, struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1462 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | struct tc_cbq_wrropt opt; |
| 1464 | |
| 1465 | opt.flags = 0; |
| 1466 | opt.allot = cl->allot; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1467 | opt.priority = cl->priority + 1; |
| 1468 | opt.cpriority = cl->cpriority + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | opt.weight = cl->weight; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1470 | if (nla_put(skb, TCA_CBQ_WRROPT, sizeof(opt), &opt)) |
| 1471 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | return skb->len; |
| 1473 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1474 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1475 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | return -1; |
| 1477 | } |
| 1478 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1479 | static int cbq_dump_ovl(struct sk_buff *skb, struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1481 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | struct tc_cbq_ovl opt; |
| 1483 | |
| 1484 | opt.strategy = cl->ovl_strategy; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1485 | opt.priority2 = cl->priority2 + 1; |
Patrick McHardy | 8a47077 | 2005-06-28 12:56:45 -0700 | [diff] [blame] | 1486 | opt.pad = 0; |
Patrick McHardy | 1a13cb6 | 2007-03-16 01:22:20 -0700 | [diff] [blame] | 1487 | opt.penalty = cl->penalty; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1488 | if (nla_put(skb, TCA_CBQ_OVL_STRATEGY, sizeof(opt), &opt)) |
| 1489 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | return skb->len; |
| 1491 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1492 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1493 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | return -1; |
| 1495 | } |
| 1496 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1497 | static int cbq_dump_fopt(struct sk_buff *skb, struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1499 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | struct tc_cbq_fopt opt; |
| 1501 | |
| 1502 | if (cl->split || cl->defmap) { |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1503 | opt.split = cl->split ? cl->split->common.classid : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | opt.defmap = cl->defmap; |
| 1505 | opt.defchange = ~0; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1506 | if (nla_put(skb, TCA_CBQ_FOPT, sizeof(opt), &opt)) |
| 1507 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | } |
| 1509 | return skb->len; |
| 1510 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1511 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1512 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | return -1; |
| 1514 | } |
| 1515 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1516 | #ifdef CONFIG_NET_CLS_ACT |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1517 | static int cbq_dump_police(struct sk_buff *skb, struct cbq_class *cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1519 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | struct tc_cbq_police opt; |
| 1521 | |
| 1522 | if (cl->police) { |
| 1523 | opt.police = cl->police; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 1524 | opt.__res1 = 0; |
| 1525 | opt.__res2 = 0; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1526 | if (nla_put(skb, TCA_CBQ_POLICE, sizeof(opt), &opt)) |
| 1527 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | } |
| 1529 | return skb->len; |
| 1530 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1531 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1532 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | return -1; |
| 1534 | } |
| 1535 | #endif |
| 1536 | |
| 1537 | static int cbq_dump_attr(struct sk_buff *skb, struct cbq_class *cl) |
| 1538 | { |
| 1539 | if (cbq_dump_lss(skb, cl) < 0 || |
| 1540 | cbq_dump_rate(skb, cl) < 0 || |
| 1541 | cbq_dump_wrr(skb, cl) < 0 || |
| 1542 | cbq_dump_ovl(skb, cl) < 0 || |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1543 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | cbq_dump_police(skb, cl) < 0 || |
| 1545 | #endif |
| 1546 | cbq_dump_fopt(skb, cl) < 0) |
| 1547 | return -1; |
| 1548 | return 0; |
| 1549 | } |
| 1550 | |
| 1551 | static int cbq_dump(struct Qdisc *sch, struct sk_buff *skb) |
| 1552 | { |
| 1553 | struct cbq_sched_data *q = qdisc_priv(sch); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1554 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1556 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 1557 | if (nest == NULL) |
| 1558 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | if (cbq_dump_attr(skb, &q->link) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1560 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1561 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | return skb->len; |
| 1563 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1564 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1565 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | return -1; |
| 1567 | } |
| 1568 | |
| 1569 | static int |
| 1570 | cbq_dump_stats(struct Qdisc *sch, struct gnet_dump *d) |
| 1571 | { |
| 1572 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1573 | |
| 1574 | q->link.xstats.avgidle = q->link.avgidle; |
| 1575 | return gnet_stats_copy_app(d, &q->link.xstats, sizeof(q->link.xstats)); |
| 1576 | } |
| 1577 | |
| 1578 | static int |
| 1579 | cbq_dump_class(struct Qdisc *sch, unsigned long arg, |
| 1580 | struct sk_buff *skb, struct tcmsg *tcm) |
| 1581 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1582 | struct cbq_class *cl = (struct cbq_class *)arg; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1583 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | |
| 1585 | if (cl->tparent) |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1586 | tcm->tcm_parent = cl->tparent->common.classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | else |
| 1588 | tcm->tcm_parent = TC_H_ROOT; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1589 | tcm->tcm_handle = cl->common.classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | tcm->tcm_info = cl->q->handle; |
| 1591 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1592 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 1593 | if (nest == NULL) |
| 1594 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | if (cbq_dump_attr(skb, cl) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1596 | goto nla_put_failure; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1597 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | return skb->len; |
| 1599 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1600 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1601 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | return -1; |
| 1603 | } |
| 1604 | |
| 1605 | static int |
| 1606 | cbq_dump_class_stats(struct Qdisc *sch, unsigned long arg, |
| 1607 | struct gnet_dump *d) |
| 1608 | { |
| 1609 | struct cbq_sched_data *q = qdisc_priv(sch); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1610 | struct cbq_class *cl = (struct cbq_class *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | |
| 1612 | cl->qstats.qlen = cl->q->q.qlen; |
| 1613 | cl->xstats.avgidle = cl->avgidle; |
| 1614 | cl->xstats.undertime = 0; |
| 1615 | |
Patrick McHardy | a084980 | 2007-03-23 11:28:30 -0700 | [diff] [blame] | 1616 | if (cl->undertime != PSCHED_PASTPERFECT) |
Patrick McHardy | 8edc0c3 | 2007-03-23 11:28:55 -0700 | [diff] [blame] | 1617 | cl->xstats.undertime = cl->undertime - q->now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | |
| 1619 | if (gnet_stats_copy_basic(d, &cl->bstats) < 0 || |
Eric Dumazet | d250a5f | 2009-10-02 10:32:18 +0000 | [diff] [blame] | 1620 | gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | gnet_stats_copy_queue(d, &cl->qstats) < 0) |
| 1622 | return -1; |
| 1623 | |
| 1624 | return gnet_stats_copy_app(d, &cl->xstats, sizeof(cl->xstats)); |
| 1625 | } |
| 1626 | |
| 1627 | static int cbq_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, |
| 1628 | struct Qdisc **old) |
| 1629 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1630 | struct cbq_class *cl = (struct cbq_class *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 1632 | if (new == NULL) { |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 1633 | new = qdisc_create_dflt(sch->dev_queue, |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 1634 | &pfifo_qdisc_ops, cl->common.classid); |
| 1635 | if (new == NULL) |
| 1636 | return -ENOBUFS; |
| 1637 | } else { |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1638 | #ifdef CONFIG_NET_CLS_ACT |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 1639 | if (cl->police == TC_POLICE_RECLASSIFY) |
| 1640 | new->reshape_fail = cbq_reshape_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | } |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 1643 | sch_tree_lock(sch); |
| 1644 | *old = cl->q; |
| 1645 | cl->q = new; |
| 1646 | qdisc_tree_decrease_qlen(*old, (*old)->q.qlen); |
| 1647 | qdisc_reset(*old); |
| 1648 | sch_tree_unlock(sch); |
| 1649 | |
| 1650 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | } |
| 1652 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1653 | static struct Qdisc *cbq_leaf(struct Qdisc *sch, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1655 | struct cbq_class *cl = (struct cbq_class *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 1657 | return cl->q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | } |
| 1659 | |
Jarek Poplawski | a37ef2e | 2006-12-08 00:25:55 -0800 | [diff] [blame] | 1660 | static void cbq_qlen_notify(struct Qdisc *sch, unsigned long arg) |
| 1661 | { |
| 1662 | struct cbq_class *cl = (struct cbq_class *)arg; |
| 1663 | |
| 1664 | if (cl->q->q.qlen == 0) |
| 1665 | cbq_deactivate_class(cl); |
| 1666 | } |
| 1667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | static unsigned long cbq_get(struct Qdisc *sch, u32 classid) |
| 1669 | { |
| 1670 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1671 | struct cbq_class *cl = cbq_class_lookup(q, classid); |
| 1672 | |
| 1673 | if (cl) { |
| 1674 | cl->refcnt++; |
| 1675 | return (unsigned long)cl; |
| 1676 | } |
| 1677 | return 0; |
| 1678 | } |
| 1679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | static void cbq_destroy_class(struct Qdisc *sch, struct cbq_class *cl) |
| 1681 | { |
| 1682 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1683 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 1684 | WARN_ON(cl->filters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 1686 | tcf_destroy_chain(&cl->filter_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | qdisc_destroy(cl->q); |
| 1688 | qdisc_put_rtab(cl->R_tab); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | gen_kill_estimator(&cl->bstats, &cl->rate_est); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | if (cl != &q->link) |
| 1691 | kfree(cl); |
| 1692 | } |
| 1693 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1694 | static void cbq_destroy(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | { |
| 1696 | struct cbq_sched_data *q = qdisc_priv(sch); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 1697 | struct hlist_node *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | struct cbq_class *cl; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1699 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1701 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | q->rx_class = NULL; |
| 1703 | #endif |
| 1704 | /* |
| 1705 | * Filters must be destroyed first because we don't destroy the |
| 1706 | * classes from root to leafs which means that filters can still |
| 1707 | * be bound to classes which have been destroyed already. --TGR '04 |
| 1708 | */ |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1709 | for (h = 0; h < q->clhash.hashsize; h++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 1710 | hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 1711 | tcf_destroy_chain(&cl->filter_list); |
Patrick McHardy | b00b4bf | 2007-06-05 16:06:59 -0700 | [diff] [blame] | 1712 | } |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1713 | for (h = 0; h < q->clhash.hashsize; h++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 1714 | hlist_for_each_entry_safe(cl, next, &q->clhash.hash[h], |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1715 | common.hnode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | cbq_destroy_class(sch, cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | } |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1718 | qdisc_class_hash_destroy(&q->clhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | } |
| 1720 | |
| 1721 | static void cbq_put(struct Qdisc *sch, unsigned long arg) |
| 1722 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1723 | struct cbq_class *cl = (struct cbq_class *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | |
| 1725 | if (--cl->refcnt == 0) { |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1726 | #ifdef CONFIG_NET_CLS_ACT |
Jarek Poplawski | 102396a | 2008-08-29 14:21:52 -0700 | [diff] [blame] | 1727 | spinlock_t *root_lock = qdisc_root_sleeping_lock(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1729 | |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 1730 | spin_lock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | if (q->rx_class == cl) |
| 1732 | q->rx_class = NULL; |
David S. Miller | 7698b4f | 2008-07-16 01:42:40 -0700 | [diff] [blame] | 1733 | spin_unlock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | #endif |
| 1735 | |
| 1736 | cbq_destroy_class(sch, cl); |
| 1737 | } |
| 1738 | } |
| 1739 | |
| 1740 | static int |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1741 | cbq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, struct nlattr **tca, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | unsigned long *arg) |
| 1743 | { |
| 1744 | int err; |
| 1745 | struct cbq_sched_data *q = qdisc_priv(sch); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1746 | struct cbq_class *cl = (struct cbq_class *)*arg; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1747 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 1748 | struct nlattr *tb[TCA_CBQ_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | struct cbq_class *parent; |
| 1750 | struct qdisc_rate_table *rtab = NULL; |
| 1751 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 1752 | if (opt == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | return -EINVAL; |
| 1754 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 1755 | err = nla_parse_nested(tb, TCA_CBQ_MAX, opt, cbq_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 1756 | if (err < 0) |
| 1757 | return err; |
| 1758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | if (cl) { |
| 1760 | /* Check parent */ |
| 1761 | if (parentid) { |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1762 | if (cl->tparent && |
| 1763 | cl->tparent->common.classid != parentid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | return -EINVAL; |
| 1765 | if (!cl->tparent && parentid != TC_H_ROOT) |
| 1766 | return -EINVAL; |
| 1767 | } |
| 1768 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1769 | if (tb[TCA_CBQ_RATE]) { |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1770 | rtab = qdisc_get_rtab(nla_data(tb[TCA_CBQ_RATE]), |
| 1771 | tb[TCA_CBQ_RTAB]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | if (rtab == NULL) |
| 1773 | return -EINVAL; |
| 1774 | } |
| 1775 | |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1776 | if (tca[TCA_RATE]) { |
| 1777 | err = gen_replace_estimator(&cl->bstats, &cl->rate_est, |
| 1778 | qdisc_root_sleeping_lock(sch), |
| 1779 | tca[TCA_RATE]); |
| 1780 | if (err) { |
| 1781 | if (rtab) |
| 1782 | qdisc_put_rtab(rtab); |
| 1783 | return err; |
| 1784 | } |
| 1785 | } |
| 1786 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | /* Change class parameters */ |
| 1788 | sch_tree_lock(sch); |
| 1789 | |
| 1790 | if (cl->next_alive != NULL) |
| 1791 | cbq_deactivate_class(cl); |
| 1792 | |
| 1793 | if (rtab) { |
Patrick McHardy | b94c8af | 2008-11-20 04:11:36 -0800 | [diff] [blame] | 1794 | qdisc_put_rtab(cl->R_tab); |
| 1795 | cl->R_tab = rtab; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | } |
| 1797 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1798 | if (tb[TCA_CBQ_LSSOPT]) |
| 1799 | cbq_set_lss(cl, nla_data(tb[TCA_CBQ_LSSOPT])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1801 | if (tb[TCA_CBQ_WRROPT]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | cbq_rmprio(q, cl); |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1803 | cbq_set_wrr(cl, nla_data(tb[TCA_CBQ_WRROPT])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | } |
| 1805 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1806 | if (tb[TCA_CBQ_OVL_STRATEGY]) |
| 1807 | cbq_set_overlimit(cl, nla_data(tb[TCA_CBQ_OVL_STRATEGY])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1809 | #ifdef CONFIG_NET_CLS_ACT |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1810 | if (tb[TCA_CBQ_POLICE]) |
| 1811 | cbq_set_police(cl, nla_data(tb[TCA_CBQ_POLICE])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | #endif |
| 1813 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1814 | if (tb[TCA_CBQ_FOPT]) |
| 1815 | cbq_set_fopt(cl, nla_data(tb[TCA_CBQ_FOPT])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | |
| 1817 | if (cl->q->q.qlen) |
| 1818 | cbq_activate_class(cl); |
| 1819 | |
| 1820 | sch_tree_unlock(sch); |
| 1821 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | return 0; |
| 1823 | } |
| 1824 | |
| 1825 | if (parentid == TC_H_ROOT) |
| 1826 | return -EINVAL; |
| 1827 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1828 | if (tb[TCA_CBQ_WRROPT] == NULL || tb[TCA_CBQ_RATE] == NULL || |
| 1829 | tb[TCA_CBQ_LSSOPT] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | return -EINVAL; |
| 1831 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1832 | rtab = qdisc_get_rtab(nla_data(tb[TCA_CBQ_RATE]), tb[TCA_CBQ_RTAB]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | if (rtab == NULL) |
| 1834 | return -EINVAL; |
| 1835 | |
| 1836 | if (classid) { |
| 1837 | err = -EINVAL; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1838 | if (TC_H_MAJ(classid ^ sch->handle) || |
| 1839 | cbq_class_lookup(q, classid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | goto failure; |
| 1841 | } else { |
| 1842 | int i; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1843 | classid = TC_H_MAKE(sch->handle, 0x8000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1845 | for (i = 0; i < 0x8000; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | if (++q->hgenerator >= 0x8000) |
| 1847 | q->hgenerator = 1; |
| 1848 | if (cbq_class_lookup(q, classid|q->hgenerator) == NULL) |
| 1849 | break; |
| 1850 | } |
| 1851 | err = -ENOSR; |
| 1852 | if (i >= 0x8000) |
| 1853 | goto failure; |
| 1854 | classid = classid|q->hgenerator; |
| 1855 | } |
| 1856 | |
| 1857 | parent = &q->link; |
| 1858 | if (parentid) { |
| 1859 | parent = cbq_class_lookup(q, parentid); |
| 1860 | err = -EINVAL; |
| 1861 | if (parent == NULL) |
| 1862 | goto failure; |
| 1863 | } |
| 1864 | |
| 1865 | err = -ENOBUFS; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1866 | cl = kzalloc(sizeof(*cl), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | if (cl == NULL) |
| 1868 | goto failure; |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1869 | |
| 1870 | if (tca[TCA_RATE]) { |
| 1871 | err = gen_new_estimator(&cl->bstats, &cl->rate_est, |
| 1872 | qdisc_root_sleeping_lock(sch), |
| 1873 | tca[TCA_RATE]); |
| 1874 | if (err) { |
| 1875 | kfree(cl); |
| 1876 | goto failure; |
| 1877 | } |
| 1878 | } |
| 1879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | cl->R_tab = rtab; |
| 1881 | rtab = NULL; |
| 1882 | cl->refcnt = 1; |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 1883 | cl->q = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, classid); |
| 1884 | if (!cl->q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | cl->q = &noop_qdisc; |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1886 | cl->common.classid = classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | cl->tparent = parent; |
| 1888 | cl->qdisc = sch; |
| 1889 | cl->allot = parent->allot; |
| 1890 | cl->quantum = cl->allot; |
| 1891 | cl->weight = cl->R_tab->rate.rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | |
| 1893 | sch_tree_lock(sch); |
| 1894 | cbq_link_class(cl); |
| 1895 | cl->borrow = cl->tparent; |
| 1896 | if (cl->tparent != &q->link) |
| 1897 | cl->share = cl->tparent; |
| 1898 | cbq_adjust_levels(parent); |
| 1899 | cl->minidle = -0x7FFFFFFF; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1900 | cbq_set_lss(cl, nla_data(tb[TCA_CBQ_LSSOPT])); |
| 1901 | cbq_set_wrr(cl, nla_data(tb[TCA_CBQ_WRROPT])); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1902 | if (cl->ewma_log == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | cl->ewma_log = q->link.ewma_log; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1904 | if (cl->maxidle == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | cl->maxidle = q->link.maxidle; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1906 | if (cl->avpkt == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | cl->avpkt = q->link.avpkt; |
| 1908 | cl->overlimit = cbq_ovl_classic; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1909 | if (tb[TCA_CBQ_OVL_STRATEGY]) |
| 1910 | cbq_set_overlimit(cl, nla_data(tb[TCA_CBQ_OVL_STRATEGY])); |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1911 | #ifdef CONFIG_NET_CLS_ACT |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1912 | if (tb[TCA_CBQ_POLICE]) |
| 1913 | cbq_set_police(cl, nla_data(tb[TCA_CBQ_POLICE])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | #endif |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1915 | if (tb[TCA_CBQ_FOPT]) |
| 1916 | cbq_set_fopt(cl, nla_data(tb[TCA_CBQ_FOPT])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | sch_tree_unlock(sch); |
| 1918 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 1919 | qdisc_class_hash_grow(sch, &q->clhash); |
| 1920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | *arg = (unsigned long)cl; |
| 1922 | return 0; |
| 1923 | |
| 1924 | failure: |
| 1925 | qdisc_put_rtab(rtab); |
| 1926 | return err; |
| 1927 | } |
| 1928 | |
| 1929 | static int cbq_delete(struct Qdisc *sch, unsigned long arg) |
| 1930 | { |
| 1931 | struct cbq_sched_data *q = qdisc_priv(sch); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1932 | struct cbq_class *cl = (struct cbq_class *)arg; |
Jarek Poplawski | a37ef2e | 2006-12-08 00:25:55 -0800 | [diff] [blame] | 1933 | unsigned int qlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | |
| 1935 | if (cl->filters || cl->children || cl == &q->link) |
| 1936 | return -EBUSY; |
| 1937 | |
| 1938 | sch_tree_lock(sch); |
| 1939 | |
Jarek Poplawski | a37ef2e | 2006-12-08 00:25:55 -0800 | [diff] [blame] | 1940 | qlen = cl->q->q.qlen; |
| 1941 | qdisc_reset(cl->q); |
| 1942 | qdisc_tree_decrease_qlen(cl->q, qlen); |
| 1943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | if (cl->next_alive) |
| 1945 | cbq_deactivate_class(cl); |
| 1946 | |
| 1947 | if (q->tx_borrowed == cl) |
| 1948 | q->tx_borrowed = q->tx_class; |
| 1949 | if (q->tx_class == cl) { |
| 1950 | q->tx_class = NULL; |
| 1951 | q->tx_borrowed = NULL; |
| 1952 | } |
Patrick McHardy | c3bc7cf | 2007-07-15 00:03:05 -0700 | [diff] [blame] | 1953 | #ifdef CONFIG_NET_CLS_ACT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | if (q->rx_class == cl) |
| 1955 | q->rx_class = NULL; |
| 1956 | #endif |
| 1957 | |
| 1958 | cbq_unlink_class(cl); |
| 1959 | cbq_adjust_levels(cl->tparent); |
| 1960 | cl->defmap = 0; |
| 1961 | cbq_sync_defmap(cl); |
| 1962 | |
| 1963 | cbq_rmprio(q, cl); |
| 1964 | sch_tree_unlock(sch); |
| 1965 | |
Jarek Poplawski | 7cd0a63 | 2009-03-15 20:00:19 -0700 | [diff] [blame] | 1966 | BUG_ON(--cl->refcnt == 0); |
| 1967 | /* |
| 1968 | * This shouldn't happen: we "hold" one cops->get() when called |
| 1969 | * from tc_ctl_tclass; the destroy method is done from cops->put(). |
| 1970 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | |
| 1972 | return 0; |
| 1973 | } |
| 1974 | |
| 1975 | static struct tcf_proto **cbq_find_tcf(struct Qdisc *sch, unsigned long arg) |
| 1976 | { |
| 1977 | struct cbq_sched_data *q = qdisc_priv(sch); |
| 1978 | struct cbq_class *cl = (struct cbq_class *)arg; |
| 1979 | |
| 1980 | if (cl == NULL) |
| 1981 | cl = &q->link; |
| 1982 | |
| 1983 | return &cl->filter_list; |
| 1984 | } |
| 1985 | |
| 1986 | static unsigned long cbq_bind_filter(struct Qdisc *sch, unsigned long parent, |
| 1987 | u32 classid) |
| 1988 | { |
| 1989 | struct cbq_sched_data *q = qdisc_priv(sch); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1990 | struct cbq_class *p = (struct cbq_class *)parent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | struct cbq_class *cl = cbq_class_lookup(q, classid); |
| 1992 | |
| 1993 | if (cl) { |
| 1994 | if (p && p->level <= cl->level) |
| 1995 | return 0; |
| 1996 | cl->filters++; |
| 1997 | return (unsigned long)cl; |
| 1998 | } |
| 1999 | return 0; |
| 2000 | } |
| 2001 | |
| 2002 | static void cbq_unbind_filter(struct Qdisc *sch, unsigned long arg) |
| 2003 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 2004 | struct cbq_class *cl = (struct cbq_class *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | |
| 2006 | cl->filters--; |
| 2007 | } |
| 2008 | |
| 2009 | static void cbq_walk(struct Qdisc *sch, struct qdisc_walker *arg) |
| 2010 | { |
| 2011 | struct cbq_sched_data *q = qdisc_priv(sch); |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 2012 | struct cbq_class *cl; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 2013 | unsigned int h; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | |
| 2015 | if (arg->stop) |
| 2016 | return; |
| 2017 | |
Patrick McHardy | d77fea2 | 2008-07-05 23:22:05 -0700 | [diff] [blame] | 2018 | for (h = 0; h < q->clhash.hashsize; h++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame^] | 2019 | hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | if (arg->count < arg->skip) { |
| 2021 | arg->count++; |
| 2022 | continue; |
| 2023 | } |
| 2024 | if (arg->fn(sch, (unsigned long)cl, arg) < 0) { |
| 2025 | arg->stop = 1; |
| 2026 | return; |
| 2027 | } |
| 2028 | arg->count++; |
| 2029 | } |
| 2030 | } |
| 2031 | } |
| 2032 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 2033 | static const struct Qdisc_class_ops cbq_class_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | .graft = cbq_graft, |
| 2035 | .leaf = cbq_leaf, |
Jarek Poplawski | a37ef2e | 2006-12-08 00:25:55 -0800 | [diff] [blame] | 2036 | .qlen_notify = cbq_qlen_notify, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | .get = cbq_get, |
| 2038 | .put = cbq_put, |
| 2039 | .change = cbq_change_class, |
| 2040 | .delete = cbq_delete, |
| 2041 | .walk = cbq_walk, |
| 2042 | .tcf_chain = cbq_find_tcf, |
| 2043 | .bind_tcf = cbq_bind_filter, |
| 2044 | .unbind_tcf = cbq_unbind_filter, |
| 2045 | .dump = cbq_dump_class, |
| 2046 | .dump_stats = cbq_dump_class_stats, |
| 2047 | }; |
| 2048 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 2049 | static struct Qdisc_ops cbq_qdisc_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | .next = NULL, |
| 2051 | .cl_ops = &cbq_class_ops, |
| 2052 | .id = "cbq", |
| 2053 | .priv_size = sizeof(struct cbq_sched_data), |
| 2054 | .enqueue = cbq_enqueue, |
| 2055 | .dequeue = cbq_dequeue, |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 2056 | .peek = qdisc_peek_dequeued, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | .drop = cbq_drop, |
| 2058 | .init = cbq_init, |
| 2059 | .reset = cbq_reset, |
| 2060 | .destroy = cbq_destroy, |
| 2061 | .change = NULL, |
| 2062 | .dump = cbq_dump, |
| 2063 | .dump_stats = cbq_dump_stats, |
| 2064 | .owner = THIS_MODULE, |
| 2065 | }; |
| 2066 | |
| 2067 | static int __init cbq_module_init(void) |
| 2068 | { |
| 2069 | return register_qdisc(&cbq_qdisc_ops); |
| 2070 | } |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 2071 | static void __exit cbq_module_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | { |
| 2073 | unregister_qdisc(&cbq_qdisc_ops); |
| 2074 | } |
| 2075 | module_init(cbq_module_init) |
| 2076 | module_exit(cbq_module_exit) |
| 2077 | MODULE_LICENSE("GPL"); |