Lines Matching full:pch
275 static void ppp_channel_push(struct channel *pch);
277 struct channel *pch);
284 struct channel *pch);
299 static int ppp_connect_channel(struct channel *pch, int unit);
300 static int ppp_disconnect_channel(struct channel *pch);
301 static void ppp_destroy_channel(struct channel *pch);
652 static int ppp_bridge_channels(struct channel *pch, struct channel *pchb) in ppp_bridge_channels() argument
654 write_lock_bh(&pch->upl); in ppp_bridge_channels()
655 if (pch->ppp || in ppp_bridge_channels()
656 rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl))) { in ppp_bridge_channels()
657 write_unlock_bh(&pch->upl); in ppp_bridge_channels()
661 rcu_assign_pointer(pch->bridge, pchb); in ppp_bridge_channels()
662 write_unlock_bh(&pch->upl); in ppp_bridge_channels()
670 refcount_inc(&pch->file.refcnt); in ppp_bridge_channels()
671 rcu_assign_pointer(pchb->bridge, pch); in ppp_bridge_channels()
677 write_lock_bh(&pch->upl); in ppp_bridge_channels()
678 /* Re-read pch->bridge with upl held in case it was modified concurrently */ in ppp_bridge_channels()
679 pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl)); in ppp_bridge_channels()
680 RCU_INIT_POINTER(pch->bridge, NULL); in ppp_bridge_channels()
681 write_unlock_bh(&pch->upl); in ppp_bridge_channels()
691 static int ppp_unbridge_channels(struct channel *pch) in ppp_unbridge_channels() argument
695 write_lock_bh(&pch->upl); in ppp_unbridge_channels()
696 pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl)); in ppp_unbridge_channels()
698 write_unlock_bh(&pch->upl); in ppp_unbridge_channels()
701 RCU_INIT_POINTER(pch->bridge, NULL); in ppp_unbridge_channels()
702 write_unlock_bh(&pch->upl); in ppp_unbridge_channels()
704 /* Only modify pchb if phcb->bridge points back to pch. in ppp_unbridge_channels()
711 if (pchbb == pch) in ppp_unbridge_channels()
717 if (pchbb == pch) in ppp_unbridge_channels()
718 if (refcount_dec_and_test(&pch->file.refcnt)) in ppp_unbridge_channels()
719 ppp_destroy_channel(pch); in ppp_unbridge_channels()
762 struct channel *pch, *pchb; in ppp_ioctl() local
766 pch = PF_TO_CHANNEL(pf); in ppp_ioctl()
772 err = ppp_connect_channel(pch, unit); in ppp_ioctl()
776 err = ppp_disconnect_channel(pch); in ppp_ioctl()
794 err = ppp_bridge_channels(pch, pchb); in ppp_ioctl()
801 err = ppp_unbridge_channels(pch); in ppp_ioctl()
805 down_read(&pch->chan_sem); in ppp_ioctl()
806 chan = pch->chan; in ppp_ioctl()
810 up_read(&pch->chan_sem); in ppp_ioctl()
1611 struct channel *pch; in ppp_fill_forward_path() local
1619 pch = list_first_entry(&ppp->channels, struct channel, clist); in ppp_fill_forward_path()
1620 chan = pch->chan; in ppp_fill_forward_path()
1888 struct channel *pch; in ppp_push() local
1905 pch = list_entry(list, struct channel, clist); in ppp_push()
1907 spin_lock(&pch->downl); in ppp_push()
1908 if (pch->chan) { in ppp_push()
1909 if (pch->chan->ops->start_xmit(pch->chan, skb)) in ppp_push()
1916 spin_unlock(&pch->downl); in ppp_push()
1952 struct channel *pch; in ppp_mp_explode() local
1966 list_for_each_entry(pch, &ppp->channels, clist) { in ppp_mp_explode()
1967 if (pch->chan) { in ppp_mp_explode()
1968 pch->avail = 1; in ppp_mp_explode()
1970 pch->speed = pch->chan->speed; in ppp_mp_explode()
1972 pch->avail = 0; in ppp_mp_explode()
1974 if (pch->avail) { in ppp_mp_explode()
1975 if (skb_queue_empty(&pch->file.xq) || in ppp_mp_explode()
1976 !pch->had_frag) { in ppp_mp_explode()
1977 if (pch->speed == 0) in ppp_mp_explode()
1980 totspeed += pch->speed; in ppp_mp_explode()
1982 pch->avail = 2; in ppp_mp_explode()
1986 if (!pch->had_frag && i < ppp->nxchan) in ppp_mp_explode()
2029 pch = list_entry(list, struct channel, clist); in ppp_mp_explode()
2031 if (!pch->avail) in ppp_mp_explode()
2038 if (pch->avail == 1) { in ppp_mp_explode()
2042 pch->avail = 1; in ppp_mp_explode()
2046 spin_lock(&pch->downl); in ppp_mp_explode()
2047 if (pch->chan == NULL) { in ppp_mp_explode()
2049 if (pch->speed == 0) in ppp_mp_explode()
2052 totspeed -= pch->speed; in ppp_mp_explode()
2054 spin_unlock(&pch->downl); in ppp_mp_explode()
2055 pch->avail = 0; in ppp_mp_explode()
2072 if (pch->speed == 0) { in ppp_mp_explode()
2080 ((totspeed*totfree)/pch->speed)) - hdrlen; in ppp_mp_explode()
2082 flen += ((totfree - nzero)*pch->speed)/totspeed; in ppp_mp_explode()
2083 nbigger -= ((totfree - nzero)*pch->speed)/ in ppp_mp_explode()
2104 pch->avail = 2; in ppp_mp_explode()
2105 spin_unlock(&pch->downl); in ppp_mp_explode()
2114 mtu = pch->chan->mtu - (hdrlen - 2); in ppp_mp_explode()
2141 chan = pch->chan; in ppp_mp_explode()
2142 if (!skb_queue_empty(&pch->file.xq) || in ppp_mp_explode()
2144 skb_queue_tail(&pch->file.xq, frag); in ppp_mp_explode()
2145 pch->had_frag = 1; in ppp_mp_explode()
2150 spin_unlock(&pch->downl); in ppp_mp_explode()
2157 spin_unlock(&pch->downl); in ppp_mp_explode()
2167 static void __ppp_channel_push(struct channel *pch) in __ppp_channel_push() argument
2172 spin_lock(&pch->downl); in __ppp_channel_push()
2173 if (pch->chan) { in __ppp_channel_push()
2174 while (!skb_queue_empty(&pch->file.xq)) { in __ppp_channel_push()
2175 skb = skb_dequeue(&pch->file.xq); in __ppp_channel_push()
2176 if (!pch->chan->ops->start_xmit(pch->chan, skb)) { in __ppp_channel_push()
2178 skb_queue_head(&pch->file.xq, skb); in __ppp_channel_push()
2184 skb_queue_purge(&pch->file.xq); in __ppp_channel_push()
2186 spin_unlock(&pch->downl); in __ppp_channel_push()
2188 if (skb_queue_empty(&pch->file.xq)) { in __ppp_channel_push()
2189 ppp = pch->ppp; in __ppp_channel_push()
2195 static void ppp_channel_push(struct channel *pch) in ppp_channel_push() argument
2197 read_lock_bh(&pch->upl); in ppp_channel_push()
2198 if (pch->ppp) { in ppp_channel_push()
2199 (*this_cpu_ptr(pch->ppp->xmit_recursion))++; in ppp_channel_push()
2200 __ppp_channel_push(pch); in ppp_channel_push()
2201 (*this_cpu_ptr(pch->ppp->xmit_recursion))--; in ppp_channel_push()
2203 __ppp_channel_push(pch); in ppp_channel_push()
2205 read_unlock_bh(&pch->upl); in ppp_channel_push()
2219 ppp_do_recv(struct ppp *ppp, struct sk_buff *skb, struct channel *pch) in ppp_do_recv() argument
2223 ppp_receive_frame(ppp, skb, pch); in ppp_do_recv()
2274 static bool ppp_channel_bridge_input(struct channel *pch, struct sk_buff *skb) in ppp_channel_bridge_input() argument
2279 pchb = rcu_dereference(pch->bridge); in ppp_channel_bridge_input()
2290 skb_scrub_packet(skb, !net_eq(pch->chan_net, pchb->chan_net)); in ppp_channel_bridge_input()
2306 struct channel *pch = chan->ppp; in ppp_input() local
2309 if (!pch) { in ppp_input()
2315 if (ppp_channel_bridge_input(pch, skb)) in ppp_input()
2318 read_lock_bh(&pch->upl); in ppp_input()
2321 if (pch->ppp) { in ppp_input()
2322 ++pch->ppp->dev->stats.rx_length_errors; in ppp_input()
2323 ppp_receive_error(pch->ppp); in ppp_input()
2329 if (!pch->ppp || proto >= 0xc000 || proto == PPP_CCPFRAG) { in ppp_input()
2331 skb_queue_tail(&pch->file.rq, skb); in ppp_input()
2333 while (pch->file.rq.qlen > PPP_MAX_RQLEN && in ppp_input()
2334 (skb = skb_dequeue(&pch->file.rq))) in ppp_input()
2336 wake_up_interruptible(&pch->file.rwait); in ppp_input()
2338 ppp_do_recv(pch->ppp, skb, pch); in ppp_input()
2342 read_unlock_bh(&pch->upl); in ppp_input()
2349 struct channel *pch = chan->ppp; in ppp_input_error() local
2352 if (!pch) in ppp_input_error()
2355 read_lock_bh(&pch->upl); in ppp_input_error()
2356 if (pch->ppp) { in ppp_input_error()
2361 ppp_do_recv(pch->ppp, skb, pch); in ppp_input_error()
2364 read_unlock_bh(&pch->upl); in ppp_input_error()
2372 ppp_receive_frame(struct ppp *ppp, struct sk_buff *skb, struct channel *pch) in ppp_receive_frame() argument
2380 ppp_receive_mp_frame(ppp, skb, pch); in ppp_receive_frame()
2615 ppp_receive_mp_frame(struct ppp *ppp, struct sk_buff *skb, struct channel *pch) in ppp_receive_mp_frame() argument
2653 pch->lastseq = seq; in ppp_receive_mp_frame()
2904 struct channel *pch; in ppp_register_net_channel() local
2907 pch = kzalloc(sizeof(struct channel), GFP_KERNEL); in ppp_register_net_channel()
2908 if (!pch) in ppp_register_net_channel()
2913 pch->ppp = NULL; in ppp_register_net_channel()
2914 pch->chan = chan; in ppp_register_net_channel()
2915 pch->chan_net = get_net_track(net, &pch->ns_tracker, GFP_KERNEL); in ppp_register_net_channel()
2916 chan->ppp = pch; in ppp_register_net_channel()
2917 init_ppp_file(&pch->file, CHANNEL); in ppp_register_net_channel()
2918 pch->file.hdrlen = chan->hdrlen; in ppp_register_net_channel()
2920 pch->lastseq = -1; in ppp_register_net_channel()
2922 init_rwsem(&pch->chan_sem); in ppp_register_net_channel()
2923 spin_lock_init(&pch->downl); in ppp_register_net_channel()
2924 rwlock_init(&pch->upl); in ppp_register_net_channel()
2927 pch->file.index = ++pn->last_channel_index; in ppp_register_net_channel()
2928 list_add(&pch->list, &pn->new_channels); in ppp_register_net_channel()
2940 struct channel *pch = chan->ppp; in ppp_channel_index() local
2942 if (pch) in ppp_channel_index()
2943 return pch->file.index; in ppp_channel_index()
2952 struct channel *pch = chan->ppp; in ppp_unit_number() local
2955 if (pch) { in ppp_unit_number()
2956 read_lock_bh(&pch->upl); in ppp_unit_number()
2957 if (pch->ppp) in ppp_unit_number()
2958 unit = pch->ppp->file.index; in ppp_unit_number()
2959 read_unlock_bh(&pch->upl); in ppp_unit_number()
2969 struct channel *pch = chan->ppp; in ppp_dev_name() local
2972 if (pch) { in ppp_dev_name()
2973 read_lock_bh(&pch->upl); in ppp_dev_name()
2974 if (pch->ppp && pch->ppp->dev) in ppp_dev_name()
2975 name = pch->ppp->dev->name; in ppp_dev_name()
2976 read_unlock_bh(&pch->upl); in ppp_dev_name()
2989 struct channel *pch = chan->ppp; in ppp_unregister_channel() local
2992 if (!pch) in ppp_unregister_channel()
3001 down_write(&pch->chan_sem); in ppp_unregister_channel()
3002 spin_lock_bh(&pch->downl); in ppp_unregister_channel()
3003 pch->chan = NULL; in ppp_unregister_channel()
3004 spin_unlock_bh(&pch->downl); in ppp_unregister_channel()
3005 up_write(&pch->chan_sem); in ppp_unregister_channel()
3006 ppp_disconnect_channel(pch); in ppp_unregister_channel()
3008 pn = ppp_pernet(pch->chan_net); in ppp_unregister_channel()
3010 list_del(&pch->list); in ppp_unregister_channel()
3013 ppp_unbridge_channels(pch); in ppp_unregister_channel()
3015 pch->file.dead = 1; in ppp_unregister_channel()
3016 wake_up_interruptible(&pch->file.rwait); in ppp_unregister_channel()
3018 if (refcount_dec_and_test(&pch->file.refcnt)) in ppp_unregister_channel()
3019 ppp_destroy_channel(pch); in ppp_unregister_channel()
3029 struct channel *pch = chan->ppp; in ppp_output_wakeup() local
3031 if (!pch) in ppp_output_wakeup()
3033 ppp_channel_push(pch); in ppp_output_wakeup()
3454 struct channel *pch; in ppp_find_channel() local
3456 list_for_each_entry(pch, &pn->new_channels, list) { in ppp_find_channel()
3457 if (pch->file.index == unit) { in ppp_find_channel()
3458 list_move(&pch->list, &pn->all_channels); in ppp_find_channel()
3459 return pch; in ppp_find_channel()
3463 list_for_each_entry(pch, &pn->all_channels, list) { in ppp_find_channel()
3464 if (pch->file.index == unit) in ppp_find_channel()
3465 return pch; in ppp_find_channel()
3475 ppp_connect_channel(struct channel *pch, int unit) in ppp_connect_channel() argument
3482 pn = ppp_pernet(pch->chan_net); in ppp_connect_channel()
3488 write_lock_bh(&pch->upl); in ppp_connect_channel()
3490 if (pch->ppp || in ppp_connect_channel()
3491 rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl))) in ppp_connect_channel()
3495 spin_lock_bh(&pch->downl); in ppp_connect_channel()
3496 if (!pch->chan) { in ppp_connect_channel()
3498 spin_unlock_bh(&pch->downl); in ppp_connect_channel()
3503 spin_unlock_bh(&pch->downl); in ppp_connect_channel()
3504 if (pch->file.hdrlen > ppp->file.hdrlen) in ppp_connect_channel()
3505 ppp->file.hdrlen = pch->file.hdrlen; in ppp_connect_channel()
3506 hdrlen = pch->file.hdrlen + 2; /* for protocol bytes */ in ppp_connect_channel()
3509 list_add_tail(&pch->clist, &ppp->channels); in ppp_connect_channel()
3511 pch->ppp = ppp; in ppp_connect_channel()
3517 write_unlock_bh(&pch->upl); in ppp_connect_channel()
3527 ppp_disconnect_channel(struct channel *pch) in ppp_disconnect_channel() argument
3532 write_lock_bh(&pch->upl); in ppp_disconnect_channel()
3533 ppp = pch->ppp; in ppp_disconnect_channel()
3534 pch->ppp = NULL; in ppp_disconnect_channel()
3535 write_unlock_bh(&pch->upl); in ppp_disconnect_channel()
3539 list_del(&pch->clist); in ppp_disconnect_channel()
3553 static void ppp_destroy_channel(struct channel *pch) in ppp_destroy_channel() argument
3555 put_net_track(pch->chan_net, &pch->ns_tracker); in ppp_destroy_channel()
3556 pch->chan_net = NULL; in ppp_destroy_channel()
3560 if (!pch->file.dead) { in ppp_destroy_channel()
3562 pr_err("ppp: destroying undead channel %p !\n", pch); in ppp_destroy_channel()
3565 skb_queue_purge(&pch->file.xq); in ppp_destroy_channel()
3566 skb_queue_purge(&pch->file.rq); in ppp_destroy_channel()
3567 kfree(pch); in ppp_destroy_channel()