ÿØÿà JFIF    ÿÛ „  ( %"1!%)+...383,7(-.+  -+++--++++---+-+-----+---------------+---+-++7-----ÿÀ  ß â" ÿÄ     ÿÄ H    !1AQaq"‘¡2B±ÁÑð#R“Ò Tbr‚²á3csƒ’ÂñDS¢³$CÿÄ   ÿÄ %  !1AQa"23‘ÿÚ   ? ôÿ ¨pŸªáÿ —åYõõ\?àÒü©ŠÄï¨pŸªáÿ —åYõõ\?àÓü©ŠÄá 0Ÿªáÿ Ÿå[úƒ ú®ði~TÁbqÐ8OÕpÿ ƒOò¤Oè`–RÂáœá™êi€ßÉ< FtŸI“öÌ8úDf´°å}“¾œ6  öFá°y¥jñÇh†ˆ¢ã/ÃÐ:ªcÈ "Y¡ðÑl>ÿ ”ÏËte:qž\oäŠe÷󲍷˜HT4&ÿ ÓÐü6ö®¿øþßèô Ÿ•7Ñi’•j|“ñì>b…þS?*Óôÿ ÓÐü*h¥£ír¶ü UãSç‚Ÿ[AÐaè[ûª•õ&õj?†Éö+EzP—WeÒírJFt ‘BŒ†Ï‡%#tE Øz ¥OÛ«!1›üä±Í™%ºÍãö]°î(–:@<‹ŒÊö×òÆt¦ãº+‡¦%ÌÁ²h´OƒJŒtMÜ>ÀÜÊw3Y´•牋4ǍýʏTì>œú=Íwhyë,¾Ôò×õ¿ßÊa»«þˆѪQ|%6ž™A õ%:øj<>É—ÿ Å_ˆCbõ¥š±ý¯Ýƒï…¶|RëócÍf溪“t.СøTÿ *Ä¿-{†çàczůŽ_–^XþŒ±miB[X±d 1,é”zEù»& î9gœf™9Ð'.;—™i}!ôšåîqêÛ٤ёý£½ÆA–àôe"A$˝Úsäÿ ÷Û #°xŸëí(l »ý3—¥5m! rt`†0~'j2(]S¦¦kv,ÚÇ l¦øJA£Šƒ J3E8ÙiŽ:cÉžúeZ°€¯\®kÖ(79«Ž:¯X”¾³Š&¡* ….‰Ž(ÜíŸ2¥ª‡×Hi²TF¤ò[¨íÈRëÉ䢍mgÑ.Ÿ<öäS0í„ǹÁU´f#Vß;Õ–…P@3ío<ä-±»Ž.L|kªÀê›fÂ6@»eu‚|ÓaÞÆŸ…¨ááå>åŠ?cKü6ùTÍÆ”†sĤÚ;H2RÚ†õ\Ö·Ÿn'¾ ñ#ºI¤Å´%çÁ­‚â7›‹qT3Iï¨ÖÚ5I7Ë!ÅOóŸ¶øÝñØôת¦$Tcö‘[«Ö³šÒ';Aþ ¸èíg A2Z"i¸vdÄ÷.iõ®§)¿]¤À†–‡É&ä{V¶iŽ”.Ó×Õÿ û?h¬Mt–íª[ÿ Ñÿ ÌV(í}=ibÔ¡›¥¢±b Lô¥‡piη_Z<‡z§èŒ)iÖwiÇ 2hÙ3·=’d÷8éŽ1¦¸c¤µ€7›7Ø ð\á)} ¹fËí›pAÃL%âc2 í§æQz¿;T8sæ°qø)QFMð‰XŒÂ±N¢aF¨…8¯!U  Z©RÊ ÖPVÄÀÍin™Ì-GˆªÅËŠ›•zË}º±ŽÍFò¹}Uw×#ä5B¤{î}Ð<ÙD é©¤&‡ïDbàÁôMÁ." ¤‡ú*õ'VŽ|¼´Úgllº¼klz[Æüï÷Aób‡Eÿ dÑ»Xx9ÃÜ£ÁT/`¼¸vI±Ýµ·Ë‚“G³þ*Ÿû´r|*}<¨îºœ @¦mÄ’M¹”.œ«Y–|6ÏU¤jç¥ÕÞqO ˜kDÆÁ¨5ÿ š;Њ¦¦€GÙk \ –Þ=â¼=SͧµªS°ÚÍpÜãQűÀõ¬?ÃÁ1Ñ•õZà?hóœ€ L¦l{Y*K˜Ù›zc˜–ˆâ ø+¾ ­-Ök¥%ùEÜA'}ˆ><ÊIè“bpÍ/qÞâvoX€w,\úªò6Z[XdÒæ­@Ö—€$òJí#é>'°Ú ôª˜<)4ryÙ£|óAÅn5žêŸyÒäMÝ2{"}‰–¤l÷ûWX\l¾Á¸góÉOÔ /óñB¤f¸çñ[.P˜ZsÊË*ßT܈§QN¢’¡¨§V¼(Üù*eÕ“”5T¨‹Âê¥FŒã½Dü[8'Ò¥a…Ú¶k7a *•›¼'Ò·\8¨ª\@\õ¢¦íq+DÙrmÎ…_ªæ»ŠÓœ¡¯’Ré9MÅ×D™lælffc+ŒÑ,ý™ÿ ¯þǤ=Å’Á7µ÷ÚÛ/“Ü€ñýã¼àí¾ÕÑ+ƒ,uµMâÀÄbm:ÒÎPæ{˜Gz[ƒ¯«® KHà`ßØŠéí¯P8Aq.C‰ à€kòpj´kN¶qô€…Õ,ÜNŠª-­{Zö’æû44‰sŽè‰îVíRœÕm" 6?³D9¡ÇTíÅꋇ`4«¸ÝÁô ï’ýorqКÇZ«x4Žâéþuïf¹µö[P ,Q£éaX±`PÉÍZ ¸äYúg üAx ’6Lê‚xÝÓ*äQ  Ï’¨hÍ =²,6ï#rÃ<¯–£»ƒ‹,–ê•€ aÛsñ'%Æ"®ÛüìBᝠHÚ3ß°©$“XnœÖ’î2ËTeûìxîß ¦å¿çÉ ðK§þ{‘t‚Ϋ¬jéîZ[ ”š7L¥4VÚCE×]m¤Øy”ä4-dz£œ§¸x.*ãÊÊ b÷•h:©‡¦s`BTÁRû¾g⻩‹jø sF¢àJøFl‘È•Xᓁà~*j¯ +(ÚÕ6-£¯÷GŠØy‚<Ç’.F‹Hœw(+)ÜÜâÈzÄäT§FߘãÏ;DmVœ3Àu@mÚüXÝü•3B¨òÌÁÛ<·ÃÜ z,Ì@õÅ·d2]ü8s÷IôÞ¯^Ç9¢u„~ëAŸï4«M? 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tin->backlog_bytes -= skb->len; tin->backlog_packets--; flow->backlog -= skb->len; fq->backlog--; fq->memory_usage -= skb->truesize; } static void fq_rejigger_backlog(struct fq *fq, struct fq_flow *flow) { struct fq_flow *i; if (flow->backlog == 0) { list_del_init(&flow->backlogchain); } else { i = flow; list_for_each_entry_continue(i, &fq->backlogs, backlogchain) if (i->backlog < flow->backlog) break; list_move_tail(&flow->backlogchain, &i->backlogchain); } } static struct sk_buff *fq_flow_dequeue(struct fq *fq, struct fq_flow *flow) { struct sk_buff *skb; lockdep_assert_held(&fq->lock); skb = __skb_dequeue(&flow->queue); if (!skb) return NULL; fq_adjust_removal(fq, flow, skb); fq_rejigger_backlog(fq, flow); return skb; } static struct sk_buff *fq_tin_dequeue(struct fq *fq, struct fq_tin *tin, fq_tin_dequeue_t dequeue_func) { struct fq_flow *flow; struct list_head *head; struct sk_buff *skb; lockdep_assert_held(&fq->lock); begin: head = &tin->new_flows; if (list_empty(head)) { head = &tin->old_flows; if (list_empty(head)) return NULL; } flow = list_first_entry(head, struct fq_flow, flowchain); if (flow->deficit <= 0) { flow->deficit += fq->quantum; list_move_tail(&flow->flowchain, &tin->old_flows); goto begin; } skb = dequeue_func(fq, tin, flow); if (!skb) { /* force a pass through old_flows to prevent starvation */ if ((head == &tin->new_flows) && !list_empty(&tin->old_flows)) { list_move_tail(&flow->flowchain, &tin->old_flows); } else { list_del_init(&flow->flowchain); flow->tin = NULL; } goto begin; } flow->deficit -= skb->len; tin->tx_bytes += skb->len; tin->tx_packets++; return skb; } static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb) { u32 hash = skb_get_hash_perturb(skb, &fq->perturbation); return reciprocal_scale(hash, fq->flows_cnt); } static struct fq_flow *fq_flow_classify(struct fq *fq, struct fq_tin *tin, u32 idx, struct sk_buff *skb, fq_flow_get_default_t get_default_func) { struct fq_flow *flow; lockdep_assert_held(&fq->lock); flow = &fq->flows[idx]; if (flow->tin && flow->tin != tin) { flow = get_default_func(fq, tin, idx, skb); tin->collisions++; fq->collisions++; } if (!flow->tin) tin->flows++; return flow; } static void fq_recalc_backlog(struct fq *fq, struct fq_tin *tin, struct fq_flow *flow) { struct fq_flow *i; if (list_empty(&flow->backlogchain)) list_add_tail(&flow->backlogchain, &fq->backlogs); i = flow; list_for_each_entry_continue_reverse(i, &fq->backlogs, backlogchain) if (i->backlog > flow->backlog) break; list_move(&flow->backlogchain, &i->backlogchain); } static void fq_tin_enqueue(struct fq *fq, struct fq_tin *tin, u32 idx, struct sk_buff *skb, fq_skb_free_t free_func, fq_flow_get_default_t get_default_func) { struct fq_flow *flow; bool oom; lockdep_assert_held(&fq->lock); flow = fq_flow_classify(fq, tin, idx, skb, get_default_func); flow->tin = tin; flow->backlog += skb->len; tin->backlog_bytes += skb->len; tin->backlog_packets++; fq->memory_usage += skb->truesize; fq->backlog++; fq_recalc_backlog(fq, tin, flow); if (list_empty(&flow->flowchain)) { flow->deficit = fq->quantum; list_add_tail(&flow->flowchain, &tin->new_flows); } __skb_queue_tail(&flow->queue, skb); oom = (fq->memory_usage > fq->memory_limit); while (fq->backlog > fq->limit || oom) { flow = list_first_entry_or_null(&fq->backlogs, struct fq_flow, backlogchain); if (!flow) return; skb = fq_flow_dequeue(fq, flow); if (!skb) return; free_func(fq, flow->tin, flow, skb); flow->tin->overlimit++; fq->overlimit++; if (oom) { fq->overmemory++; oom = (fq->memory_usage > fq->memory_limit); } } } static void fq_flow_filter(struct fq *fq, struct fq_flow *flow, fq_skb_filter_t filter_func, void *filter_data, fq_skb_free_t free_func) { struct fq_tin *tin = flow->tin; struct sk_buff *skb, *tmp; lockdep_assert_held(&fq->lock); skb_queue_walk_safe(&flow->queue, skb, tmp) { if (!filter_func(fq, tin, flow, skb, filter_data)) continue; __skb_unlink(skb, &flow->queue); fq_adjust_removal(fq, flow, skb); free_func(fq, tin, flow, skb); } fq_rejigger_backlog(fq, flow); } static void fq_tin_filter(struct fq *fq, struct fq_tin *tin, fq_skb_filter_t filter_func, void *filter_data, fq_skb_free_t free_func) { struct fq_flow *flow; lockdep_assert_held(&fq->lock); list_for_each_entry(flow, &tin->new_flows, flowchain) fq_flow_filter(fq, flow, filter_func, filter_data, free_func); list_for_each_entry(flow, &tin->old_flows, flowchain) fq_flow_filter(fq, flow, filter_func, filter_data, free_func); } static void fq_flow_reset(struct fq *fq, struct fq_flow *flow, fq_skb_free_t free_func) { struct sk_buff *skb; while ((skb = fq_flow_dequeue(fq, flow))) free_func(fq, flow->tin, flow, skb); if (!list_empty(&flow->flowchain)) list_del_init(&flow->flowchain); if (!list_empty(&flow->backlogchain)) list_del_init(&flow->backlogchain); flow->tin = NULL; WARN_ON_ONCE(flow->backlog); } static void fq_tin_reset(struct fq *fq, struct fq_tin *tin, fq_skb_free_t free_func) { struct list_head *head; struct fq_flow *flow; for (;;) { head = &tin->new_flows; if (list_empty(head)) { head = &tin->old_flows; if (list_empty(head)) break; } flow = list_first_entry(head, struct fq_flow, flowchain); fq_flow_reset(fq, flow, free_func); } WARN_ON_ONCE(tin->backlog_bytes); WARN_ON_ONCE(tin->backlog_packets); } static void fq_flow_init(struct fq_flow *flow) { INIT_LIST_HEAD(&flow->flowchain); INIT_LIST_HEAD(&flow->backlogchain); __skb_queue_head_init(&flow->queue); } static void fq_tin_init(struct fq_tin *tin) { INIT_LIST_HEAD(&tin->new_flows); INIT_LIST_HEAD(&tin->old_flows); } static int fq_init(struct fq *fq, int flows_cnt) { int i; memset(fq, 0, sizeof(fq[0])); INIT_LIST_HEAD(&fq->backlogs); spin_lock_init(&fq->lock); fq->flows_cnt = max_t(u32, flows_cnt, 1); get_random_bytes(&fq->perturbation, sizeof(fq->perturbation)); fq->quantum = 300; fq->limit = 8192; fq->memory_limit = 16 << 20; /* 16 MBytes */ fq->flows = kvcalloc(fq->flows_cnt, sizeof(fq->flows[0]), GFP_KERNEL); if (!fq->flows) return -ENOMEM; for (i = 0; i < fq->flows_cnt; i++) fq_flow_init(&fq->flows[i]); return 0; } static void fq_reset(struct fq *fq, fq_skb_free_t free_func) { int i; for (i = 0; i < fq->flows_cnt; i++) fq_flow_reset(fq, &fq->flows[i], free_func); kvfree(fq->flows); fq->flows = NULL; } #endif