Lines Matching refs:pch
276 static void ppp_channel_push(struct channel *pch);
278 struct channel *pch);
285 struct channel *pch);
300 static int ppp_connect_channel(struct channel *pch, int unit);
301 static int ppp_disconnect_channel(struct channel *pch);
302 static void ppp_destroy_channel(struct channel *pch);
653 static int ppp_bridge_channels(struct channel *pch, struct channel *pchb) in ppp_bridge_channels() argument
655 write_lock_bh(&pch->upl); in ppp_bridge_channels()
656 if (pch->ppp || in ppp_bridge_channels()
657 rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl))) { in ppp_bridge_channels()
658 write_unlock_bh(&pch->upl); in ppp_bridge_channels()
662 rcu_assign_pointer(pch->bridge, pchb); in ppp_bridge_channels()
663 write_unlock_bh(&pch->upl); in ppp_bridge_channels()
671 refcount_inc(&pch->file.refcnt); in ppp_bridge_channels()
672 rcu_assign_pointer(pchb->bridge, pch); in ppp_bridge_channels()
678 write_lock_bh(&pch->upl); in ppp_bridge_channels()
680 pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl)); in ppp_bridge_channels()
681 RCU_INIT_POINTER(pch->bridge, NULL); in ppp_bridge_channels()
682 write_unlock_bh(&pch->upl); in ppp_bridge_channels()
692 static int ppp_unbridge_channels(struct channel *pch) in ppp_unbridge_channels() argument
696 write_lock_bh(&pch->upl); in ppp_unbridge_channels()
697 pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl)); in ppp_unbridge_channels()
699 write_unlock_bh(&pch->upl); in ppp_unbridge_channels()
702 RCU_INIT_POINTER(pch->bridge, NULL); in ppp_unbridge_channels()
703 write_unlock_bh(&pch->upl); in ppp_unbridge_channels()
712 if (pchbb == pch) in ppp_unbridge_channels()
718 if (pchbb == pch) in ppp_unbridge_channels()
719 if (refcount_dec_and_test(&pch->file.refcnt)) in ppp_unbridge_channels()
720 ppp_destroy_channel(pch); in ppp_unbridge_channels()
763 struct channel *pch, *pchb; in ppp_ioctl() local
767 pch = PF_TO_CHANNEL(pf); in ppp_ioctl()
773 err = ppp_connect_channel(pch, unit); in ppp_ioctl()
777 err = ppp_disconnect_channel(pch); in ppp_ioctl()
795 err = ppp_bridge_channels(pch, pchb); in ppp_ioctl()
802 err = ppp_unbridge_channels(pch); in ppp_ioctl()
806 down_read(&pch->chan_sem); in ppp_ioctl()
807 chan = pch->chan; in ppp_ioctl()
811 up_read(&pch->chan_sem); in ppp_ioctl()
1615 struct channel *pch; in ppp_fill_forward_path() local
1623 pch = list_first_entry(&ppp->channels, struct channel, clist); in ppp_fill_forward_path()
1624 chan = pch->chan; in ppp_fill_forward_path()
1892 struct channel *pch; in ppp_push() local
1909 pch = list_entry(list, struct channel, clist); in ppp_push()
1911 spin_lock(&pch->downl); in ppp_push()
1912 if (pch->chan) { in ppp_push()
1913 if (pch->chan->ops->start_xmit(pch->chan, skb)) in ppp_push()
1920 spin_unlock(&pch->downl); in ppp_push()
1956 struct channel *pch; in ppp_mp_explode() local
1970 list_for_each_entry(pch, &ppp->channels, clist) { in ppp_mp_explode()
1971 if (pch->chan) { in ppp_mp_explode()
1972 pch->avail = 1; in ppp_mp_explode()
1974 pch->speed = pch->chan->speed; in ppp_mp_explode()
1976 pch->avail = 0; in ppp_mp_explode()
1978 if (pch->avail) { in ppp_mp_explode()
1979 if (skb_queue_empty(&pch->file.xq) || in ppp_mp_explode()
1980 !pch->had_frag) { in ppp_mp_explode()
1981 if (pch->speed == 0) in ppp_mp_explode()
1984 totspeed += pch->speed; in ppp_mp_explode()
1986 pch->avail = 2; in ppp_mp_explode()
1990 if (!pch->had_frag && i < ppp->nxchan) in ppp_mp_explode()
2033 pch = list_entry(list, struct channel, clist); in ppp_mp_explode()
2035 if (!pch->avail) in ppp_mp_explode()
2042 if (pch->avail == 1) { in ppp_mp_explode()
2046 pch->avail = 1; in ppp_mp_explode()
2050 spin_lock(&pch->downl); in ppp_mp_explode()
2051 if (pch->chan == NULL) { in ppp_mp_explode()
2053 if (pch->speed == 0) in ppp_mp_explode()
2056 totspeed -= pch->speed; in ppp_mp_explode()
2058 spin_unlock(&pch->downl); in ppp_mp_explode()
2059 pch->avail = 0; in ppp_mp_explode()
2076 if (pch->speed == 0) { in ppp_mp_explode()
2084 ((totspeed*totfree)/pch->speed)) - hdrlen; in ppp_mp_explode()
2086 flen += ((totfree - nzero)*pch->speed)/totspeed; in ppp_mp_explode()
2087 nbigger -= ((totfree - nzero)*pch->speed)/ in ppp_mp_explode()
2108 pch->avail = 2; in ppp_mp_explode()
2109 spin_unlock(&pch->downl); in ppp_mp_explode()
2118 mtu = pch->chan->mtu - (hdrlen - 2); in ppp_mp_explode()
2145 chan = pch->chan; in ppp_mp_explode()
2146 if (!skb_queue_empty(&pch->file.xq) || in ppp_mp_explode()
2148 skb_queue_tail(&pch->file.xq, frag); in ppp_mp_explode()
2149 pch->had_frag = 1; in ppp_mp_explode()
2154 spin_unlock(&pch->downl); in ppp_mp_explode()
2161 spin_unlock(&pch->downl); in ppp_mp_explode()
2171 static void __ppp_channel_push(struct channel *pch) in __ppp_channel_push() argument
2176 spin_lock(&pch->downl); in __ppp_channel_push()
2177 if (pch->chan) { in __ppp_channel_push()
2178 while (!skb_queue_empty(&pch->file.xq)) { in __ppp_channel_push()
2179 skb = skb_dequeue(&pch->file.xq); in __ppp_channel_push()
2180 if (!pch->chan->ops->start_xmit(pch->chan, skb)) { in __ppp_channel_push()
2182 skb_queue_head(&pch->file.xq, skb); in __ppp_channel_push()
2188 skb_queue_purge(&pch->file.xq); in __ppp_channel_push()
2190 spin_unlock(&pch->downl); in __ppp_channel_push()
2192 if (skb_queue_empty(&pch->file.xq)) { in __ppp_channel_push()
2193 ppp = pch->ppp; in __ppp_channel_push()
2199 static void ppp_channel_push(struct channel *pch) in ppp_channel_push() argument
2201 read_lock_bh(&pch->upl); in ppp_channel_push()
2202 if (pch->ppp) { in ppp_channel_push()
2203 (*this_cpu_ptr(pch->ppp->xmit_recursion))++; in ppp_channel_push()
2204 __ppp_channel_push(pch); in ppp_channel_push()
2205 (*this_cpu_ptr(pch->ppp->xmit_recursion))--; in ppp_channel_push()
2207 __ppp_channel_push(pch); in ppp_channel_push()
2209 read_unlock_bh(&pch->upl); in ppp_channel_push()
2223 ppp_do_recv(struct ppp *ppp, struct sk_buff *skb, struct channel *pch) in ppp_do_recv() argument
2227 ppp_receive_frame(ppp, skb, pch); in ppp_do_recv()
2278 static bool ppp_channel_bridge_input(struct channel *pch, struct sk_buff *skb) in ppp_channel_bridge_input() argument
2283 pchb = rcu_dereference(pch->bridge); in ppp_channel_bridge_input()
2294 skb_scrub_packet(skb, !net_eq(pch->chan_net, pchb->chan_net)); in ppp_channel_bridge_input()
2310 struct channel *pch = chan->ppp; in ppp_input() local
2313 if (!pch) { in ppp_input()
2319 if (ppp_channel_bridge_input(pch, skb)) in ppp_input()
2322 read_lock_bh(&pch->upl); in ppp_input()
2325 if (pch->ppp) { in ppp_input()
2326 ++pch->ppp->dev->stats.rx_length_errors; in ppp_input()
2327 ppp_receive_error(pch->ppp); in ppp_input()
2333 if (!pch->ppp || proto >= 0xc000 || proto == PPP_CCPFRAG) { in ppp_input()
2335 skb_queue_tail(&pch->file.rq, skb); in ppp_input()
2337 while (pch->file.rq.qlen > PPP_MAX_RQLEN && in ppp_input()
2338 (skb = skb_dequeue(&pch->file.rq))) in ppp_input()
2340 wake_up_interruptible(&pch->file.rwait); in ppp_input()
2342 ppp_do_recv(pch->ppp, skb, pch); in ppp_input()
2346 read_unlock_bh(&pch->upl); in ppp_input()
2353 struct channel *pch = chan->ppp; in ppp_input_error() local
2356 if (!pch) in ppp_input_error()
2359 read_lock_bh(&pch->upl); in ppp_input_error()
2360 if (pch->ppp) { in ppp_input_error()
2365 ppp_do_recv(pch->ppp, skb, pch); in ppp_input_error()
2368 read_unlock_bh(&pch->upl); in ppp_input_error()
2376 ppp_receive_frame(struct ppp *ppp, struct sk_buff *skb, struct channel *pch) in ppp_receive_frame() argument
2384 ppp_receive_mp_frame(ppp, skb, pch); in ppp_receive_frame()
2619 ppp_receive_mp_frame(struct ppp *ppp, struct sk_buff *skb, struct channel *pch) in ppp_receive_mp_frame() argument
2657 pch->lastseq = seq; in ppp_receive_mp_frame()
2908 struct channel *pch; in ppp_register_net_channel() local
2911 pch = kzalloc(sizeof(struct channel), GFP_KERNEL); in ppp_register_net_channel()
2912 if (!pch) in ppp_register_net_channel()
2917 pch->ppp = NULL; in ppp_register_net_channel()
2918 pch->chan = chan; in ppp_register_net_channel()
2919 pch->chan_net = get_net_track(net, &pch->ns_tracker, GFP_KERNEL); in ppp_register_net_channel()
2920 chan->ppp = pch; in ppp_register_net_channel()
2921 init_ppp_file(&pch->file, CHANNEL); in ppp_register_net_channel()
2922 pch->file.hdrlen = chan->hdrlen; in ppp_register_net_channel()
2924 pch->lastseq = -1; in ppp_register_net_channel()
2926 init_rwsem(&pch->chan_sem); in ppp_register_net_channel()
2927 spin_lock_init(&pch->downl); in ppp_register_net_channel()
2928 rwlock_init(&pch->upl); in ppp_register_net_channel()
2931 pch->file.index = ++pn->last_channel_index; in ppp_register_net_channel()
2932 list_add(&pch->list, &pn->new_channels); in ppp_register_net_channel()
2944 struct channel *pch = chan->ppp; in ppp_channel_index() local
2946 if (pch) in ppp_channel_index()
2947 return pch->file.index; in ppp_channel_index()
2956 struct channel *pch = chan->ppp; in ppp_unit_number() local
2959 if (pch) { in ppp_unit_number()
2960 read_lock_bh(&pch->upl); in ppp_unit_number()
2961 if (pch->ppp) in ppp_unit_number()
2962 unit = pch->ppp->file.index; in ppp_unit_number()
2963 read_unlock_bh(&pch->upl); in ppp_unit_number()
2973 struct channel *pch = chan->ppp; in ppp_dev_name() local
2976 if (pch) { in ppp_dev_name()
2977 read_lock_bh(&pch->upl); in ppp_dev_name()
2978 if (pch->ppp && pch->ppp->dev) in ppp_dev_name()
2979 name = pch->ppp->dev->name; in ppp_dev_name()
2980 read_unlock_bh(&pch->upl); in ppp_dev_name()
2993 struct channel *pch = chan->ppp; in ppp_unregister_channel() local
2996 if (!pch) in ppp_unregister_channel()
3005 down_write(&pch->chan_sem); in ppp_unregister_channel()
3006 spin_lock_bh(&pch->downl); in ppp_unregister_channel()
3007 pch->chan = NULL; in ppp_unregister_channel()
3008 spin_unlock_bh(&pch->downl); in ppp_unregister_channel()
3009 up_write(&pch->chan_sem); in ppp_unregister_channel()
3010 ppp_disconnect_channel(pch); in ppp_unregister_channel()
3012 pn = ppp_pernet(pch->chan_net); in ppp_unregister_channel()
3014 list_del(&pch->list); in ppp_unregister_channel()
3017 ppp_unbridge_channels(pch); in ppp_unregister_channel()
3019 pch->file.dead = 1; in ppp_unregister_channel()
3020 wake_up_interruptible(&pch->file.rwait); in ppp_unregister_channel()
3022 if (refcount_dec_and_test(&pch->file.refcnt)) in ppp_unregister_channel()
3023 ppp_destroy_channel(pch); in ppp_unregister_channel()
3033 struct channel *pch = chan->ppp; in ppp_output_wakeup() local
3035 if (!pch) in ppp_output_wakeup()
3037 ppp_channel_push(pch); in ppp_output_wakeup()
3458 struct channel *pch; in ppp_find_channel() local
3460 list_for_each_entry(pch, &pn->new_channels, list) { in ppp_find_channel()
3461 if (pch->file.index == unit) { in ppp_find_channel()
3462 list_move(&pch->list, &pn->all_channels); in ppp_find_channel()
3463 return pch; in ppp_find_channel()
3467 list_for_each_entry(pch, &pn->all_channels, list) { in ppp_find_channel()
3468 if (pch->file.index == unit) in ppp_find_channel()
3469 return pch; in ppp_find_channel()
3479 ppp_connect_channel(struct channel *pch, int unit) in ppp_connect_channel() argument
3486 pn = ppp_pernet(pch->chan_net); in ppp_connect_channel()
3492 write_lock_bh(&pch->upl); in ppp_connect_channel()
3494 if (pch->ppp || in ppp_connect_channel()
3495 rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl))) in ppp_connect_channel()
3499 spin_lock_bh(&pch->downl); in ppp_connect_channel()
3500 if (!pch->chan) { in ppp_connect_channel()
3502 spin_unlock_bh(&pch->downl); in ppp_connect_channel()
3507 if (pch->chan->direct_xmit) in ppp_connect_channel()
3511 spin_unlock_bh(&pch->downl); in ppp_connect_channel()
3512 if (pch->file.hdrlen > ppp->file.hdrlen) in ppp_connect_channel()
3513 ppp->file.hdrlen = pch->file.hdrlen; in ppp_connect_channel()
3514 hdrlen = pch->file.hdrlen + 2; /* for protocol bytes */ in ppp_connect_channel()
3517 list_add_tail(&pch->clist, &ppp->channels); in ppp_connect_channel()
3519 pch->ppp = ppp; in ppp_connect_channel()
3525 write_unlock_bh(&pch->upl); in ppp_connect_channel()
3535 ppp_disconnect_channel(struct channel *pch) in ppp_disconnect_channel() argument
3540 write_lock_bh(&pch->upl); in ppp_disconnect_channel()
3541 ppp = pch->ppp; in ppp_disconnect_channel()
3542 pch->ppp = NULL; in ppp_disconnect_channel()
3543 write_unlock_bh(&pch->upl); in ppp_disconnect_channel()
3547 list_del(&pch->clist); in ppp_disconnect_channel()
3561 static void ppp_destroy_channel(struct channel *pch) in ppp_destroy_channel() argument
3563 put_net_track(pch->chan_net, &pch->ns_tracker); in ppp_destroy_channel()
3564 pch->chan_net = NULL; in ppp_destroy_channel()
3568 if (!pch->file.dead) { in ppp_destroy_channel()
3570 pr_err("ppp: destroying undead channel %p !\n", pch); in ppp_destroy_channel()
3573 skb_queue_purge(&pch->file.xq); in ppp_destroy_channel()
3574 skb_queue_purge(&pch->file.rq); in ppp_destroy_channel()
3575 kfree(pch); in ppp_destroy_channel()