Lines Matching refs:tun
135 struct tun_struct __rcu *tun; member
161 struct tun_struct *tun; member
262 static void tun_napi_init(struct tun_struct *tun, struct tun_file *tfile, in tun_napi_init() argument
268 netif_tx_napi_add(tun->dev, &tfile->napi, tun_napi_poll, in tun_napi_init()
292 static inline bool tun_legacy_is_little_endian(struct tun_struct *tun) in tun_legacy_is_little_endian() argument
294 return tun->flags & TUN_VNET_BE ? false : in tun_legacy_is_little_endian()
298 static long tun_get_vnet_be(struct tun_struct *tun, int __user *argp) in tun_get_vnet_be() argument
300 int be = !!(tun->flags & TUN_VNET_BE); in tun_get_vnet_be()
308 static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) in tun_set_vnet_be() argument
316 tun->flags |= TUN_VNET_BE; in tun_set_vnet_be()
318 tun->flags &= ~TUN_VNET_BE; in tun_set_vnet_be()
323 static inline bool tun_legacy_is_little_endian(struct tun_struct *tun) in tun_legacy_is_little_endian() argument
328 static long tun_get_vnet_be(struct tun_struct *tun, int __user *argp) in tun_get_vnet_be() argument
333 static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) in tun_set_vnet_be() argument
339 static inline bool tun_is_little_endian(struct tun_struct *tun) in tun_is_little_endian() argument
341 return tun->flags & TUN_VNET_LE || in tun_is_little_endian()
342 tun_legacy_is_little_endian(tun); in tun_is_little_endian()
345 static inline u16 tun16_to_cpu(struct tun_struct *tun, __virtio16 val) in tun16_to_cpu() argument
347 return __virtio16_to_cpu(tun_is_little_endian(tun), val); in tun16_to_cpu()
350 static inline __virtio16 cpu_to_tun16(struct tun_struct *tun, u16 val) in cpu_to_tun16() argument
352 return __cpu_to_virtio16(tun_is_little_endian(tun), val); in cpu_to_tun16()
371 static struct tun_flow_entry *tun_flow_create(struct tun_struct *tun, in tun_flow_create() argument
378 netif_info(tun, tx_queued, tun->dev, in tun_flow_create()
385 e->tun = tun; in tun_flow_create()
387 ++tun->flow_count; in tun_flow_create()
392 static void tun_flow_delete(struct tun_struct *tun, struct tun_flow_entry *e) in tun_flow_delete() argument
394 netif_info(tun, tx_queued, tun->dev, "delete flow: hash %u index %u\n", in tun_flow_delete()
398 --tun->flow_count; in tun_flow_delete()
401 static void tun_flow_flush(struct tun_struct *tun) in tun_flow_flush() argument
405 spin_lock_bh(&tun->lock); in tun_flow_flush()
410 hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) in tun_flow_flush()
411 tun_flow_delete(tun, e); in tun_flow_flush()
413 spin_unlock_bh(&tun->lock); in tun_flow_flush()
416 static void tun_flow_delete_by_queue(struct tun_struct *tun, u16 queue_index) in tun_flow_delete_by_queue() argument
420 spin_lock_bh(&tun->lock); in tun_flow_delete_by_queue()
425 hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) { in tun_flow_delete_by_queue()
427 tun_flow_delete(tun, e); in tun_flow_delete_by_queue()
430 spin_unlock_bh(&tun->lock); in tun_flow_delete_by_queue()
435 struct tun_struct *tun = from_timer(tun, t, flow_gc_timer); in tun_flow_cleanup() local
436 unsigned long delay = tun->ageing_time; in tun_flow_cleanup()
441 spin_lock(&tun->lock); in tun_flow_cleanup()
446 hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) { in tun_flow_cleanup()
451 tun_flow_delete(tun, e); in tun_flow_cleanup()
461 mod_timer(&tun->flow_gc_timer, round_jiffies_up(next_timer)); in tun_flow_cleanup()
462 spin_unlock(&tun->lock); in tun_flow_cleanup()
465 static void tun_flow_update(struct tun_struct *tun, u32 rxhash, in tun_flow_update() argument
470 unsigned long delay = tun->ageing_time; in tun_flow_update()
473 head = &tun->flows[tun_hashfn(rxhash)]; in tun_flow_update()
486 spin_lock_bh(&tun->lock); in tun_flow_update()
488 tun->flow_count < MAX_TAP_FLOWS) in tun_flow_update()
489 tun_flow_create(tun, head, rxhash, queue_index); in tun_flow_update()
491 if (!timer_pending(&tun->flow_gc_timer)) in tun_flow_update()
492 mod_timer(&tun->flow_gc_timer, in tun_flow_update()
494 spin_unlock_bh(&tun->lock); in tun_flow_update()
515 static u16 tun_automq_select_queue(struct tun_struct *tun, struct sk_buff *skb) in tun_automq_select_queue() argument
521 numqueues = READ_ONCE(tun->numqueues); in tun_automq_select_queue()
524 e = tun_flow_find(&tun->flows[tun_hashfn(txq)], txq); in tun_automq_select_queue()
536 static u16 tun_ebpf_select_queue(struct tun_struct *tun, struct sk_buff *skb) in tun_ebpf_select_queue() argument
542 numqueues = READ_ONCE(tun->numqueues); in tun_ebpf_select_queue()
546 prog = rcu_dereference(tun->steering_prog); in tun_ebpf_select_queue()
556 struct tun_struct *tun = netdev_priv(dev); in tun_select_queue() local
560 if (rcu_dereference(tun->steering_prog)) in tun_select_queue()
561 ret = tun_ebpf_select_queue(tun, skb); in tun_select_queue()
563 ret = tun_automq_select_queue(tun, skb); in tun_select_queue()
569 static inline bool tun_not_capable(struct tun_struct *tun) in tun_not_capable() argument
572 struct net *net = dev_net(tun->dev); in tun_not_capable()
574 return ((uid_valid(tun->owner) && !uid_eq(cred->euid, tun->owner)) || in tun_not_capable()
575 (gid_valid(tun->group) && !in_egroup_p(tun->group))) && in tun_not_capable()
579 static void tun_set_real_num_queues(struct tun_struct *tun) in tun_set_real_num_queues() argument
581 netif_set_real_num_tx_queues(tun->dev, tun->numqueues); in tun_set_real_num_queues()
582 netif_set_real_num_rx_queues(tun->dev, tun->numqueues); in tun_set_real_num_queues()
585 static void tun_disable_queue(struct tun_struct *tun, struct tun_file *tfile) in tun_disable_queue() argument
587 tfile->detached = tun; in tun_disable_queue()
588 list_add_tail(&tfile->next, &tun->disabled); in tun_disable_queue()
589 ++tun->numdisabled; in tun_disable_queue()
594 struct tun_struct *tun = tfile->detached; in tun_enable_queue() local
598 --tun->numdisabled; in tun_enable_queue()
599 return tun; in tun_enable_queue()
630 struct tun_struct *tun; in __tun_detach() local
632 tun = rtnl_dereference(tfile->tun); in __tun_detach()
634 if (tun && clean) { in __tun_detach()
639 if (tun && !tfile->detached) { in __tun_detach()
641 BUG_ON(index >= tun->numqueues); in __tun_detach()
643 rcu_assign_pointer(tun->tfiles[index], in __tun_detach()
644 tun->tfiles[tun->numqueues - 1]); in __tun_detach()
645 ntfile = rtnl_dereference(tun->tfiles[index]); in __tun_detach()
647 rcu_assign_pointer(tun->tfiles[tun->numqueues - 1], in __tun_detach()
650 --tun->numqueues; in __tun_detach()
652 RCU_INIT_POINTER(tfile->tun, NULL); in __tun_detach()
655 tun_disable_queue(tun, tfile); in __tun_detach()
658 tun_flow_delete_by_queue(tun, tun->numqueues + 1); in __tun_detach()
661 tun_set_real_num_queues(tun); in __tun_detach()
663 tun = tun_enable_queue(tfile); in __tun_detach()
668 if (tun && tun->numqueues == 0 && tun->numdisabled == 0) { in __tun_detach()
669 netif_carrier_off(tun->dev); in __tun_detach()
671 if (!(tun->flags & IFF_PERSIST) && in __tun_detach()
672 tun->dev->reg_state == NETREG_REGISTERED) in __tun_detach()
673 unregister_netdevice(tun->dev); in __tun_detach()
675 if (tun) in __tun_detach()
684 struct tun_struct *tun; in tun_detach() local
688 tun = rtnl_dereference(tfile->tun); in tun_detach()
689 dev = tun ? tun->dev : NULL; in tun_detach()
698 struct tun_struct *tun = netdev_priv(dev); in tun_detach_all() local
700 int i, n = tun->numqueues; in tun_detach_all()
703 tfile = rtnl_dereference(tun->tfiles[i]); in tun_detach_all()
708 RCU_INIT_POINTER(tfile->tun, NULL); in tun_detach_all()
709 --tun->numqueues; in tun_detach_all()
711 list_for_each_entry(tfile, &tun->disabled, next) { in tun_detach_all()
714 RCU_INIT_POINTER(tfile->tun, NULL); in tun_detach_all()
716 BUG_ON(tun->numqueues != 0); in tun_detach_all()
720 tfile = rtnl_dereference(tun->tfiles[i]); in tun_detach_all()
727 list_for_each_entry_safe(tfile, tmp, &tun->disabled, next) { in tun_detach_all()
733 BUG_ON(tun->numdisabled != 0); in tun_detach_all()
735 if (tun->flags & IFF_PERSIST) in tun_detach_all()
739 static int tun_attach(struct tun_struct *tun, struct file *file, in tun_attach() argument
744 struct net_device *dev = tun->dev; in tun_attach()
747 err = security_tun_dev_attach(tfile->socket.sk, tun->security); in tun_attach()
752 if (rtnl_dereference(tfile->tun) && !tfile->detached) in tun_attach()
756 if (!(tun->flags & IFF_MULTI_QUEUE) && tun->numqueues == 1) in tun_attach()
761 tun->numqueues + tun->numdisabled == MAX_TAP_QUEUES) in tun_attach()
767 if (!skip_filter && (tun->filter_attached == true)) { in tun_attach()
769 err = sk_attach_filter(&tun->fprog, tfile->socket.sk); in tun_attach()
782 tfile->queue_index = tun->numqueues; in tun_attach()
794 tun->dev, tfile->queue_index); in tun_attach()
810 tun_napi_init(tun, tfile, napi, napi_frags); in tun_attach()
813 if (rtnl_dereference(tun->xdp_prog)) in tun_attach()
825 rcu_assign_pointer(tfile->tun, tun); in tun_attach()
826 rcu_assign_pointer(tun->tfiles[tun->numqueues], tfile); in tun_attach()
827 tun->numqueues++; in tun_attach()
828 tun_set_real_num_queues(tun); in tun_attach()
835 struct tun_struct *tun; in tun_get() local
838 tun = rcu_dereference(tfile->tun); in tun_get()
839 if (tun) in tun_get()
840 dev_hold(tun->dev); in tun_get()
843 return tun; in tun_get()
846 static void tun_put(struct tun_struct *tun) in tun_put() argument
848 dev_put(tun->dev); in tun_put()
981 static void tun_automq_xmit(struct tun_struct *tun, struct sk_buff *skb) in tun_automq_xmit() argument
984 if (tun->numqueues == 1 && static_branch_unlikely(&rps_needed)) { in tun_automq_xmit()
992 e = tun_flow_find(&tun->flows[tun_hashfn(rxhash)], rxhash); in tun_automq_xmit()
999 static unsigned int run_ebpf_filter(struct tun_struct *tun, in run_ebpf_filter() argument
1003 struct tun_prog *prog = rcu_dereference(tun->filter_prog); in run_ebpf_filter()
1014 struct tun_struct *tun = netdev_priv(dev); in tun_net_xmit() local
1020 tfile = rcu_dereference(tun->tfiles[txq]); in tun_net_xmit()
1026 if (!rcu_dereference(tun->steering_prog)) in tun_net_xmit()
1027 tun_automq_xmit(tun, skb); in tun_net_xmit()
1029 netif_info(tun, tx_queued, tun->dev, "%s %d\n", __func__, skb->len); in tun_net_xmit()
1034 if (!check_filter(&tun->txflt, skb)) in tun_net_xmit()
1041 len = run_ebpf_filter(tun, skb, len); in tun_net_xmit()
1069 this_cpu_inc(tun->pcpu_stats->tx_dropped); in tun_net_xmit()
1088 struct tun_struct *tun = netdev_priv(dev); in tun_net_fix_features() local
1090 return (features & tun->set_features) | (features & ~TUN_USER_FEATURES); in tun_net_fix_features()
1095 struct tun_struct *tun = netdev_priv(dev); in tun_set_headroom() local
1100 tun->align = new_hr; in tun_set_headroom()
1107 struct tun_struct *tun = netdev_priv(dev); in tun_net_get_stats64() local
1115 p = per_cpu_ptr(tun->pcpu_stats, i); in tun_net_get_stats64()
1142 struct tun_struct *tun = netdev_priv(dev); in tun_xdp_set() local
1147 old_prog = rtnl_dereference(tun->xdp_prog); in tun_xdp_set()
1148 rcu_assign_pointer(tun->xdp_prog, prog); in tun_xdp_set()
1152 for (i = 0; i < tun->numqueues; i++) { in tun_xdp_set()
1153 tfile = rtnl_dereference(tun->tfiles[i]); in tun_xdp_set()
1159 list_for_each_entry(tfile, &tun->disabled, next) { in tun_xdp_set()
1182 struct tun_struct *tun = netdev_priv(dev); in tun_net_change_carrier() local
1184 if (!tun->numqueues) in tun_net_change_carrier()
1217 struct tun_struct *tun = netdev_priv(dev); in tun_xdp_xmit() local
1230 numqueues = READ_ONCE(tun->numqueues); in tun_xdp_xmit()
1236 tfile = rcu_dereference(tun->tfiles[smp_processor_id() % in tun_xdp_xmit()
1250 this_cpu_inc(tun->pcpu_stats->tx_dropped); in tun_xdp_xmit()
1292 static void tun_flow_init(struct tun_struct *tun) in tun_flow_init() argument
1297 INIT_HLIST_HEAD(&tun->flows[i]); in tun_flow_init()
1299 tun->ageing_time = TUN_FLOW_EXPIRE; in tun_flow_init()
1300 timer_setup(&tun->flow_gc_timer, tun_flow_cleanup, 0); in tun_flow_init()
1301 mod_timer(&tun->flow_gc_timer, in tun_flow_init()
1302 round_jiffies_up(jiffies + tun->ageing_time)); in tun_flow_init()
1305 static void tun_flow_uninit(struct tun_struct *tun) in tun_flow_uninit() argument
1307 del_timer_sync(&tun->flow_gc_timer); in tun_flow_uninit()
1308 tun_flow_flush(tun); in tun_flow_uninit()
1317 struct tun_struct *tun = netdev_priv(dev); in tun_net_init() local
1319 switch (tun->flags & TUN_TYPE_MASK) { in tun_net_init()
1350 static bool tun_sock_writeable(struct tun_struct *tun, struct tun_file *tfile) in tun_sock_writeable() argument
1354 return (tun->dev->flags & IFF_UP) && sock_writeable(sk); in tun_sock_writeable()
1363 struct tun_struct *tun = tun_get(tfile); in tun_chr_poll() local
1367 if (!tun) in tun_chr_poll()
1382 if (tun_sock_writeable(tun, tfile) || in tun_chr_poll()
1384 tun_sock_writeable(tun, tfile))) in tun_chr_poll()
1387 if (tun->dev->reg_state != NETREG_REGISTERED) in tun_chr_poll()
1390 tun_put(tun); in tun_chr_poll()
1474 static void tun_rx_batched(struct tun_struct *tun, struct tun_file *tfile, in tun_rx_batched() argument
1479 u32 rx_batched = tun->rx_batched; in tun_rx_batched()
1514 static bool tun_can_build_skb(struct tun_struct *tun, struct tun_file *tfile, in tun_can_build_skb() argument
1517 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in tun_can_build_skb()
1555 static int tun_xdp_act(struct tun_struct *tun, struct bpf_prog *xdp_prog, in tun_xdp_act() argument
1562 err = xdp_do_redirect(tun->dev, xdp, xdp_prog); in tun_xdp_act()
1567 err = tun_xdp_tx(tun->dev, xdp); in tun_xdp_act()
1577 trace_xdp_exception(tun->dev, xdp_prog, act); in tun_xdp_act()
1580 this_cpu_inc(tun->pcpu_stats->rx_dropped); in tun_xdp_act()
1587 static struct sk_buff *tun_build_skb(struct tun_struct *tun, in tun_build_skb() argument
1602 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_build_skb()
1633 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_build_skb()
1650 err = tun_xdp_act(tun, xdp_prog, &xdp, act); in tun_build_skb()
1677 static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, in tun_get_user() argument
1684 size_t len = total_len, align = tun->align, linear; in tun_get_user()
1695 if (!(tun->flags & IFF_NO_PI)) { in tun_get_user()
1704 if (tun->flags & IFF_VNET_HDR) { in tun_get_user()
1705 int vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz); in tun_get_user()
1715 …tun16_to_cpu(tun, gso.csum_start) + tun16_to_cpu(tun, gso.csum_offset) + 2 > tun16_to_cpu(tun, gso… in tun_get_user()
1716 …gso.hdr_len = cpu_to_tun16(tun, tun16_to_cpu(tun, gso.csum_start) + tun16_to_cpu(tun, gso.csum_off… in tun_get_user()
1718 if (tun16_to_cpu(tun, gso.hdr_len) > len) in tun_get_user()
1723 if ((tun->flags & TUN_TYPE_MASK) == IFF_TAP) { in tun_get_user()
1726 (gso.hdr_len && tun16_to_cpu(tun, gso.hdr_len) < ETH_HLEN))) in tun_get_user()
1739 copylen = gso.hdr_len ? tun16_to_cpu(tun, gso.hdr_len) : GOODCOPY_LEN; in tun_get_user()
1748 if (!frags && tun_can_build_skb(tun, tfile, len, noblock, zerocopy)) { in tun_get_user()
1753 skb = tun_build_skb(tun, tfile, from, &gso, len, &skb_xdp); in tun_get_user()
1755 this_cpu_inc(tun->pcpu_stats->rx_dropped); in tun_get_user()
1763 if (tun16_to_cpu(tun, gso.hdr_len) > good_linear) in tun_get_user()
1766 linear = tun16_to_cpu(tun, gso.hdr_len); in tun_get_user()
1784 this_cpu_inc(tun->pcpu_stats->rx_dropped); in tun_get_user()
1798 this_cpu_inc(tun->pcpu_stats->rx_dropped); in tun_get_user()
1809 if (virtio_net_hdr_to_skb(skb, &gso, tun_is_little_endian(tun))) { in tun_get_user()
1810 this_cpu_inc(tun->pcpu_stats->rx_frame_errors); in tun_get_user()
1820 switch (tun->flags & TUN_TYPE_MASK) { in tun_get_user()
1822 if (tun->flags & IFF_NO_PI) { in tun_get_user()
1833 this_cpu_inc(tun->pcpu_stats->rx_dropped); in tun_get_user()
1841 skb->dev = tun->dev; in tun_get_user()
1848 skb->protocol = eth_type_trans(skb, tun->dev); in tun_get_user()
1872 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_get_user()
1893 if (!rcu_access_pointer(tun->steering_prog) && tun->numqueues > 1 && in tun_get_user()
1898 if (unlikely(!(tun->dev->flags & IFF_UP))) { in tun_get_user()
1909 headlen = eth_get_headlen(tun->dev, skb->data, in tun_get_user()
1913 this_cpu_inc(tun->pcpu_stats->rx_dropped); in tun_get_user()
1939 tun_rx_batched(tun, tfile, skb, more); in tun_get_user()
1945 stats = get_cpu_ptr(tun->pcpu_stats); in tun_get_user()
1953 tun_flow_update(tun, rxhash, tfile); in tun_get_user()
1962 struct tun_struct *tun = tun_get(tfile); in tun_chr_write_iter() local
1966 if (!tun) in tun_chr_write_iter()
1972 result = tun_get_user(tun, tfile, NULL, from, noblock, false); in tun_chr_write_iter()
1974 tun_put(tun); in tun_chr_write_iter()
1978 static ssize_t tun_put_user_xdp(struct tun_struct *tun, in tun_put_user_xdp() argument
1988 if (tun->flags & IFF_VNET_HDR) { in tun_put_user_xdp()
1991 vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz); in tun_put_user_xdp()
2002 stats = get_cpu_ptr(tun->pcpu_stats); in tun_put_user_xdp()
2007 put_cpu_ptr(tun->pcpu_stats); in tun_put_user_xdp()
2013 static ssize_t tun_put_user(struct tun_struct *tun, in tun_put_user() argument
2028 if (tun->flags & IFF_VNET_HDR) in tun_put_user()
2029 vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz); in tun_put_user()
2033 if (!(tun->flags & IFF_NO_PI)) { in tun_put_user()
2054 tun_is_little_endian(tun), true, in tun_put_user()
2059 sinfo->gso_type, tun16_to_cpu(tun, gso.gso_size), in tun_put_user()
2060 tun16_to_cpu(tun, gso.hdr_len)); in tun_put_user()
2064 min((int)tun16_to_cpu(tun, gso.hdr_len), 64), true); in tun_put_user()
2097 stats = get_cpu_ptr(tun->pcpu_stats); in tun_put_user()
2102 put_cpu_ptr(tun->pcpu_stats); in tun_put_user()
2148 static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile, in tun_do_read() argument
2170 ret = tun_put_user_xdp(tun, tfile, xdpf, to); in tun_do_read()
2175 ret = tun_put_user(tun, tfile, skb, to); in tun_do_read()
2189 struct tun_struct *tun = tun_get(tfile); in tun_chr_read_iter() local
2193 if (!tun) in tun_chr_read_iter()
2199 ret = tun_do_read(tun, tfile, to, noblock, NULL); in tun_chr_read_iter()
2203 tun_put(tun); in tun_chr_read_iter()
2215 static int __tun_set_ebpf(struct tun_struct *tun, in __tun_set_ebpf() argument
2228 spin_lock_bh(&tun->lock); in __tun_set_ebpf()
2230 lockdep_is_held(&tun->lock)); in __tun_set_ebpf()
2232 spin_unlock_bh(&tun->lock); in __tun_set_ebpf()
2242 struct tun_struct *tun = netdev_priv(dev); in tun_free_netdev() local
2244 BUG_ON(!(list_empty(&tun->disabled))); in tun_free_netdev()
2246 free_percpu(tun->pcpu_stats); in tun_free_netdev()
2250 tun->pcpu_stats = NULL; in tun_free_netdev()
2252 tun_flow_uninit(tun); in tun_free_netdev()
2253 security_tun_dev_free_security(tun->security); in tun_free_netdev()
2254 __tun_set_ebpf(tun, &tun->steering_prog, NULL); in tun_free_netdev()
2255 __tun_set_ebpf(tun, &tun->filter_prog, NULL); in tun_free_netdev()
2260 struct tun_struct *tun = netdev_priv(dev); in tun_setup() local
2262 tun->owner = INVALID_UID; in tun_setup()
2263 tun->group = INVALID_GID; in tun_setup()
2264 tun_default_link_ksettings(dev, &tun->link_ksettings); in tun_setup()
2303 struct tun_struct *tun = netdev_priv(dev); in tun_fill_info() local
2305 if (nla_put_u8(skb, IFLA_TUN_TYPE, tun->flags & TUN_TYPE_MASK)) in tun_fill_info()
2307 if (uid_valid(tun->owner) && in tun_fill_info()
2309 from_kuid_munged(current_user_ns(), tun->owner))) in tun_fill_info()
2311 if (gid_valid(tun->group) && in tun_fill_info()
2313 from_kgid_munged(current_user_ns(), tun->group))) in tun_fill_info()
2315 if (nla_put_u8(skb, IFLA_TUN_PI, !(tun->flags & IFF_NO_PI))) in tun_fill_info()
2317 if (nla_put_u8(skb, IFLA_TUN_VNET_HDR, !!(tun->flags & IFF_VNET_HDR))) in tun_fill_info()
2319 if (nla_put_u8(skb, IFLA_TUN_PERSIST, !!(tun->flags & IFF_PERSIST))) in tun_fill_info()
2322 !!(tun->flags & IFF_MULTI_QUEUE))) in tun_fill_info()
2324 if (tun->flags & IFF_MULTI_QUEUE) { in tun_fill_info()
2325 if (nla_put_u32(skb, IFLA_TUN_NUM_QUEUES, tun->numqueues)) in tun_fill_info()
2328 tun->numdisabled)) in tun_fill_info()
2373 static int tun_xdp_one(struct tun_struct *tun, in tun_xdp_one() argument
2390 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_xdp_one()
2401 err = tun_xdp_act(tun, xdp_prog, xdp, act); in tun_xdp_one()
2438 if (virtio_net_hdr_to_skb(skb, gso, tun_is_little_endian(tun))) { in tun_xdp_one()
2439 this_cpu_inc(tun->pcpu_stats->rx_frame_errors); in tun_xdp_one()
2445 skb->protocol = eth_type_trans(skb, tun->dev); in tun_xdp_one()
2456 if (!rcu_dereference(tun->steering_prog) && tun->numqueues > 1 && in tun_xdp_one()
2465 stats = this_cpu_ptr(tun->pcpu_stats); in tun_xdp_one()
2472 tun_flow_update(tun, rxhash, tfile); in tun_xdp_one()
2482 struct tun_struct *tun = tun_get(tfile); in tun_sendmsg() local
2486 if (!tun) in tun_sendmsg()
2501 tun_xdp_one(tun, tfile, xdp, &flush, &tpage); in tun_sendmsg()
2516 ret = tun_get_user(tun, tfile, ctl ? ctl->ptr : NULL, &m->msg_iter, in tun_sendmsg()
2520 tun_put(tun); in tun_sendmsg()
2528 struct tun_struct *tun = tun_get(tfile); in tun_recvmsg() local
2532 if (!tun) { in tun_recvmsg()
2546 ret = tun_do_read(tun, tfile, &m->msg_iter, flags & MSG_DONTWAIT, ptr); in tun_recvmsg()
2552 tun_put(tun); in tun_recvmsg()
2556 tun_put(tun); in tun_recvmsg()
2579 struct tun_struct *tun; in tun_peek_len() local
2582 tun = tun_get(tfile); in tun_peek_len()
2583 if (!tun) in tun_peek_len()
2587 tun_put(tun); in tun_peek_len()
2605 static int tun_flags(struct tun_struct *tun) in tun_flags() argument
2607 return tun->flags & (TUN_FEATURES | IFF_PERSIST | IFF_TUN | IFF_TAP); in tun_flags()
2613 struct tun_struct *tun = netdev_priv(to_net_dev(dev)); in tun_show_flags() local
2614 return sprintf(buf, "0x%x\n", tun_flags(tun)); in tun_show_flags()
2620 struct tun_struct *tun = netdev_priv(to_net_dev(dev)); in tun_show_owner() local
2621 return uid_valid(tun->owner)? in tun_show_owner()
2623 from_kuid_munged(current_user_ns(), tun->owner)): in tun_show_owner()
2630 struct tun_struct *tun = netdev_priv(to_net_dev(dev)); in tun_show_group() local
2631 return gid_valid(tun->group) ? in tun_show_group()
2633 from_kgid_munged(current_user_ns(), tun->group)): in tun_show_group()
2654 struct tun_struct *tun; in tun_set_iff() local
2676 tun = netdev_priv(dev); in tun_set_iff()
2678 tun = netdev_priv(dev); in tun_set_iff()
2683 !!(tun->flags & IFF_MULTI_QUEUE)) in tun_set_iff()
2686 if (tun_not_capable(tun)) in tun_set_iff()
2688 err = security_tun_dev_open(tun->security); in tun_set_iff()
2692 err = tun_attach(tun, file, ifr->ifr_flags & IFF_NOFILTER, in tun_set_iff()
2698 if (tun->flags & IFF_MULTI_QUEUE && in tun_set_iff()
2699 (tun->numqueues + tun->numdisabled > 1)) { in tun_set_iff()
2707 tun->flags = (tun->flags & ~TUN_FEATURES) | in tun_set_iff()
2750 tun = netdev_priv(dev); in tun_set_iff()
2751 tun->dev = dev; in tun_set_iff()
2752 tun->flags = flags; in tun_set_iff()
2753 tun->txflt.count = 0; in tun_set_iff()
2754 tun->vnet_hdr_sz = sizeof(struct virtio_net_hdr); in tun_set_iff()
2756 tun->align = NET_SKB_PAD; in tun_set_iff()
2757 tun->filter_attached = false; in tun_set_iff()
2758 tun->sndbuf = tfile->socket.sk->sk_sndbuf; in tun_set_iff()
2759 tun->rx_batched = 0; in tun_set_iff()
2760 RCU_INIT_POINTER(tun->steering_prog, NULL); in tun_set_iff()
2762 tun->pcpu_stats = netdev_alloc_pcpu_stats(struct tun_pcpu_stats); in tun_set_iff()
2763 if (!tun->pcpu_stats) { in tun_set_iff()
2768 spin_lock_init(&tun->lock); in tun_set_iff()
2770 err = security_tun_dev_alloc_security(&tun->security); in tun_set_iff()
2775 tun_flow_init(tun); in tun_set_iff()
2785 tun->flags = (tun->flags & ~TUN_FEATURES) | in tun_set_iff()
2788 INIT_LIST_HEAD(&tun->disabled); in tun_set_iff()
2789 err = tun_attach(tun, file, false, ifr->ifr_flags & IFF_NAPI, in tun_set_iff()
2794 err = register_netdevice(tun->dev); in tun_set_iff()
2800 rcu_assign_pointer(tfile->tun, tun); in tun_set_iff()
2803 netif_carrier_on(tun->dev); in tun_set_iff()
2808 if (netif_running(tun->dev)) in tun_set_iff()
2809 netif_tx_wake_all_queues(tun->dev); in tun_set_iff()
2811 strcpy(ifr->ifr_name, tun->dev->name); in tun_set_iff()
2820 if (!tun->pcpu_stats) in tun_set_iff()
2824 tun_flow_uninit(tun); in tun_set_iff()
2825 security_tun_dev_free_security(tun->security); in tun_set_iff()
2827 free_percpu(tun->pcpu_stats); in tun_set_iff()
2833 static void tun_get_iff(struct tun_struct *tun, struct ifreq *ifr) in tun_get_iff() argument
2835 strcpy(ifr->ifr_name, tun->dev->name); in tun_get_iff()
2837 ifr->ifr_flags = tun_flags(tun); in tun_get_iff()
2843 static int set_offload(struct tun_struct *tun, unsigned long arg) in set_offload() argument
2871 tun->set_features = features; in set_offload()
2872 tun->dev->wanted_features &= ~TUN_USER_FEATURES; in set_offload()
2873 tun->dev->wanted_features |= features; in set_offload()
2874 netdev_update_features(tun->dev); in set_offload()
2879 static void tun_detach_filter(struct tun_struct *tun, int n) in tun_detach_filter() argument
2885 tfile = rtnl_dereference(tun->tfiles[i]); in tun_detach_filter()
2891 tun->filter_attached = false; in tun_detach_filter()
2894 static int tun_attach_filter(struct tun_struct *tun) in tun_attach_filter() argument
2899 for (i = 0; i < tun->numqueues; i++) { in tun_attach_filter()
2900 tfile = rtnl_dereference(tun->tfiles[i]); in tun_attach_filter()
2902 ret = sk_attach_filter(&tun->fprog, tfile->socket.sk); in tun_attach_filter()
2905 tun_detach_filter(tun, i); in tun_attach_filter()
2910 tun->filter_attached = true; in tun_attach_filter()
2914 static void tun_set_sndbuf(struct tun_struct *tun) in tun_set_sndbuf() argument
2919 for (i = 0; i < tun->numqueues; i++) { in tun_set_sndbuf()
2920 tfile = rtnl_dereference(tun->tfiles[i]); in tun_set_sndbuf()
2921 tfile->socket.sk->sk_sndbuf = tun->sndbuf; in tun_set_sndbuf()
2928 struct tun_struct *tun; in tun_set_queue() local
2934 tun = tfile->detached; in tun_set_queue()
2935 if (!tun) { in tun_set_queue()
2939 ret = security_tun_dev_attach_queue(tun->security); in tun_set_queue()
2942 ret = tun_attach(tun, file, false, tun->flags & IFF_NAPI, in tun_set_queue()
2943 tun->flags & IFF_NAPI_FRAGS, true); in tun_set_queue()
2945 tun = rtnl_dereference(tfile->tun); in tun_set_queue()
2946 if (!tun || !(tun->flags & IFF_MULTI_QUEUE) || tfile->detached) in tun_set_queue()
2954 netdev_state_change(tun->dev); in tun_set_queue()
2961 static int tun_set_ebpf(struct tun_struct *tun, struct tun_prog __rcu **prog_p, in tun_set_ebpf() argument
2978 return __tun_set_ebpf(tun, prog_p, prog); in tun_set_ebpf()
2986 struct tun_struct *tun; in __tun_chr_ioctl() local
3023 tun = tun_get(tfile); in __tun_chr_ioctl()
3026 if (tun) in __tun_chr_ioctl()
3042 if (tun) in __tun_chr_ioctl()
3055 if (!tun) in __tun_chr_ioctl()
3058 netif_info(tun, drv, tun->dev, "tun_chr_ioctl cmd %u\n", cmd); in __tun_chr_ioctl()
3060 net = dev_net(tun->dev); in __tun_chr_ioctl()
3064 tun_get_iff(tun, &ifr); in __tun_chr_ioctl()
3079 netif_info(tun, drv, tun->dev, "ignored: set checksum %s\n", in __tun_chr_ioctl()
3087 if (arg && !(tun->flags & IFF_PERSIST)) { in __tun_chr_ioctl()
3088 tun->flags |= IFF_PERSIST; in __tun_chr_ioctl()
3092 if (!arg && (tun->flags & IFF_PERSIST)) { in __tun_chr_ioctl()
3093 tun->flags &= ~IFF_PERSIST; in __tun_chr_ioctl()
3098 netif_info(tun, drv, tun->dev, "persist %s\n", in __tun_chr_ioctl()
3109 tun->owner = owner; in __tun_chr_ioctl()
3111 netif_info(tun, drv, tun->dev, "owner set to %u\n", in __tun_chr_ioctl()
3112 from_kuid(&init_user_ns, tun->owner)); in __tun_chr_ioctl()
3122 tun->group = group; in __tun_chr_ioctl()
3124 netif_info(tun, drv, tun->dev, "group set to %u\n", in __tun_chr_ioctl()
3125 from_kgid(&init_user_ns, tun->group)); in __tun_chr_ioctl()
3130 if (tun->dev->flags & IFF_UP) { in __tun_chr_ioctl()
3131 netif_info(tun, drv, tun->dev, in __tun_chr_ioctl()
3135 tun->dev->type = (int) arg; in __tun_chr_ioctl()
3136 netif_info(tun, drv, tun->dev, "linktype set to %d\n", in __tun_chr_ioctl()
3137 tun->dev->type); in __tun_chr_ioctl()
3143 tun->msg_enable = (u32)arg; in __tun_chr_ioctl()
3147 ret = set_offload(tun, arg); in __tun_chr_ioctl()
3153 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3155 ret = update_filter(&tun->txflt, (void __user *)arg); in __tun_chr_ioctl()
3160 memcpy(ifr.ifr_hwaddr.sa_data, tun->dev->dev_addr, ETH_ALEN); in __tun_chr_ioctl()
3161 ifr.ifr_hwaddr.sa_family = tun->dev->type; in __tun_chr_ioctl()
3168 ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr, NULL); in __tun_chr_ioctl()
3187 tun->sndbuf = sndbuf; in __tun_chr_ioctl()
3188 tun_set_sndbuf(tun); in __tun_chr_ioctl()
3192 vnet_hdr_sz = tun->vnet_hdr_sz; in __tun_chr_ioctl()
3207 tun->vnet_hdr_sz = vnet_hdr_sz; in __tun_chr_ioctl()
3211 le = !!(tun->flags & TUN_VNET_LE); in __tun_chr_ioctl()
3222 tun->flags |= TUN_VNET_LE; in __tun_chr_ioctl()
3224 tun->flags &= ~TUN_VNET_LE; in __tun_chr_ioctl()
3228 ret = tun_get_vnet_be(tun, argp); in __tun_chr_ioctl()
3232 ret = tun_set_vnet_be(tun, argp); in __tun_chr_ioctl()
3238 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3241 if (copy_from_user(&tun->fprog, argp, sizeof(tun->fprog))) in __tun_chr_ioctl()
3244 ret = tun_attach_filter(tun); in __tun_chr_ioctl()
3250 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3253 tun_detach_filter(tun, tun->numqueues); in __tun_chr_ioctl()
3258 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3261 if (copy_to_user(argp, &tun->fprog, sizeof(tun->fprog))) in __tun_chr_ioctl()
3267 ret = tun_set_ebpf(tun, &tun->steering_prog, argp); in __tun_chr_ioctl()
3271 ret = tun_set_ebpf(tun, &tun->filter_prog, argp); in __tun_chr_ioctl()
3279 ret = tun_net_change_carrier(tun->dev, (bool)carrier); in __tun_chr_ioctl()
3295 netdev_state_change(tun->dev); in __tun_chr_ioctl()
3299 if (tun) in __tun_chr_ioctl()
3300 tun_put(tun); in __tun_chr_ioctl()
3372 RCU_INIT_POINTER(tfile->tun, NULL); in tun_chr_open()
3407 struct tun_struct *tun; in tun_chr_show_fdinfo() local
3413 tun = tun_get(tfile); in tun_chr_show_fdinfo()
3414 if (tun) in tun_chr_show_fdinfo()
3415 tun_get_iff(tun, &ifr); in tun_chr_show_fdinfo()
3418 if (tun) in tun_chr_show_fdinfo()
3419 tun_put(tun); in tun_chr_show_fdinfo()
3467 struct tun_struct *tun = netdev_priv(dev); in tun_get_link_ksettings() local
3469 memcpy(cmd, &tun->link_ksettings, sizeof(*cmd)); in tun_get_link_ksettings()
3476 struct tun_struct *tun = netdev_priv(dev); in tun_set_link_ksettings() local
3478 memcpy(&tun->link_ksettings, cmd, sizeof(*cmd)); in tun_set_link_ksettings()
3484 struct tun_struct *tun = netdev_priv(dev); in tun_get_drvinfo() local
3489 switch (tun->flags & TUN_TYPE_MASK) { in tun_get_drvinfo()
3501 struct tun_struct *tun = netdev_priv(dev); in tun_get_msglevel() local
3503 return tun->msg_enable; in tun_get_msglevel()
3508 struct tun_struct *tun = netdev_priv(dev); in tun_set_msglevel() local
3510 tun->msg_enable = value; in tun_set_msglevel()
3516 struct tun_struct *tun = netdev_priv(dev); in tun_get_coalesce() local
3518 ec->rx_max_coalesced_frames = tun->rx_batched; in tun_get_coalesce()
3526 struct tun_struct *tun = netdev_priv(dev); in tun_set_coalesce() local
3529 tun->rx_batched = NAPI_POLL_WEIGHT; in tun_set_coalesce()
3531 tun->rx_batched = ec->rx_max_coalesced_frames; in tun_set_coalesce()
3549 static int tun_queue_resize(struct tun_struct *tun) in tun_queue_resize() argument
3551 struct net_device *dev = tun->dev; in tun_queue_resize()
3554 int n = tun->numqueues + tun->numdisabled; in tun_queue_resize()
3561 for (i = 0; i < tun->numqueues; i++) { in tun_queue_resize()
3562 tfile = rtnl_dereference(tun->tfiles[i]); in tun_queue_resize()
3565 list_for_each_entry(tfile, &tun->disabled, next) in tun_queue_resize()
3580 struct tun_struct *tun = netdev_priv(dev); in tun_device_event() local
3588 if (tun_queue_resize(tun)) in tun_device_event()
3592 for (i = 0; i < tun->numqueues; i++) { in tun_device_event()
3595 tfile = rtnl_dereference(tun->tfiles[i]); in tun_device_event()