Lines Matching refs:tun
132 struct tun_struct __rcu *tun; member
158 struct tun_struct *tun; member
222 static void tun_flow_init(struct tun_struct *tun);
223 static void tun_flow_uninit(struct tun_struct *tun);
265 static void tun_napi_init(struct tun_struct *tun, struct tun_file *tfile, in tun_napi_init() argument
271 netif_napi_add_tx(tun->dev, &tfile->napi, tun_napi_poll); in tun_napi_init()
300 static inline bool tun_legacy_is_little_endian(struct tun_struct *tun) in tun_legacy_is_little_endian() argument
302 return tun->flags & TUN_VNET_BE ? false : in tun_legacy_is_little_endian()
306 static long tun_get_vnet_be(struct tun_struct *tun, int __user *argp) in tun_get_vnet_be() argument
308 int be = !!(tun->flags & TUN_VNET_BE); in tun_get_vnet_be()
316 static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) in tun_set_vnet_be() argument
324 tun->flags |= TUN_VNET_BE; in tun_set_vnet_be()
326 tun->flags &= ~TUN_VNET_BE; in tun_set_vnet_be()
331 static inline bool tun_legacy_is_little_endian(struct tun_struct *tun) in tun_legacy_is_little_endian() argument
336 static long tun_get_vnet_be(struct tun_struct *tun, int __user *argp) in tun_get_vnet_be() argument
341 static long tun_set_vnet_be(struct tun_struct *tun, int __user *argp) in tun_set_vnet_be() argument
347 static inline bool tun_is_little_endian(struct tun_struct *tun) in tun_is_little_endian() argument
349 return tun->flags & TUN_VNET_LE || in tun_is_little_endian()
350 tun_legacy_is_little_endian(tun); in tun_is_little_endian()
353 static inline u16 tun16_to_cpu(struct tun_struct *tun, __virtio16 val) in tun16_to_cpu() argument
355 return __virtio16_to_cpu(tun_is_little_endian(tun), val); in tun16_to_cpu()
358 static inline __virtio16 cpu_to_tun16(struct tun_struct *tun, u16 val) in cpu_to_tun16() argument
360 return __cpu_to_virtio16(tun_is_little_endian(tun), val); in cpu_to_tun16()
379 static struct tun_flow_entry *tun_flow_create(struct tun_struct *tun, in tun_flow_create() argument
386 netif_info(tun, tx_queued, tun->dev, in tun_flow_create()
393 e->tun = tun; in tun_flow_create()
395 ++tun->flow_count; in tun_flow_create()
400 static void tun_flow_delete(struct tun_struct *tun, struct tun_flow_entry *e) in tun_flow_delete() argument
402 netif_info(tun, tx_queued, tun->dev, "delete flow: hash %u index %u\n", in tun_flow_delete()
406 --tun->flow_count; in tun_flow_delete()
409 static void tun_flow_flush(struct tun_struct *tun) in tun_flow_flush() argument
413 spin_lock_bh(&tun->lock); in tun_flow_flush()
418 hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) in tun_flow_flush()
419 tun_flow_delete(tun, e); in tun_flow_flush()
421 spin_unlock_bh(&tun->lock); in tun_flow_flush()
424 static void tun_flow_delete_by_queue(struct tun_struct *tun, u16 queue_index) in tun_flow_delete_by_queue() argument
428 spin_lock_bh(&tun->lock); in tun_flow_delete_by_queue()
433 hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) { in tun_flow_delete_by_queue()
435 tun_flow_delete(tun, e); in tun_flow_delete_by_queue()
438 spin_unlock_bh(&tun->lock); in tun_flow_delete_by_queue()
443 struct tun_struct *tun = from_timer(tun, t, flow_gc_timer); in tun_flow_cleanup() local
444 unsigned long delay = tun->ageing_time; in tun_flow_cleanup()
449 spin_lock(&tun->lock); in tun_flow_cleanup()
454 hlist_for_each_entry_safe(e, n, &tun->flows[i], hash_link) { in tun_flow_cleanup()
459 tun_flow_delete(tun, e); in tun_flow_cleanup()
469 mod_timer(&tun->flow_gc_timer, round_jiffies_up(next_timer)); in tun_flow_cleanup()
470 spin_unlock(&tun->lock); in tun_flow_cleanup()
473 static void tun_flow_update(struct tun_struct *tun, u32 rxhash, in tun_flow_update() argument
478 unsigned long delay = tun->ageing_time; in tun_flow_update()
481 head = &tun->flows[tun_hashfn(rxhash)]; in tun_flow_update()
494 spin_lock_bh(&tun->lock); in tun_flow_update()
496 tun->flow_count < MAX_TAP_FLOWS) in tun_flow_update()
497 tun_flow_create(tun, head, rxhash, queue_index); in tun_flow_update()
499 if (!timer_pending(&tun->flow_gc_timer)) in tun_flow_update()
500 mod_timer(&tun->flow_gc_timer, in tun_flow_update()
502 spin_unlock_bh(&tun->lock); in tun_flow_update()
523 static u16 tun_automq_select_queue(struct tun_struct *tun, struct sk_buff *skb) in tun_automq_select_queue() argument
529 numqueues = READ_ONCE(tun->numqueues); in tun_automq_select_queue()
532 e = tun_flow_find(&tun->flows[tun_hashfn(txq)], txq); in tun_automq_select_queue()
544 static u16 tun_ebpf_select_queue(struct tun_struct *tun, struct sk_buff *skb) in tun_ebpf_select_queue() argument
550 numqueues = READ_ONCE(tun->numqueues); in tun_ebpf_select_queue()
554 prog = rcu_dereference(tun->steering_prog); in tun_ebpf_select_queue()
564 struct tun_struct *tun = netdev_priv(dev); in tun_select_queue() local
568 if (rcu_dereference(tun->steering_prog)) in tun_select_queue()
569 ret = tun_ebpf_select_queue(tun, skb); in tun_select_queue()
571 ret = tun_automq_select_queue(tun, skb); in tun_select_queue()
577 static inline bool tun_not_capable(struct tun_struct *tun) in tun_not_capable() argument
580 struct net *net = dev_net(tun->dev); in tun_not_capable()
582 return ((uid_valid(tun->owner) && !uid_eq(cred->euid, tun->owner)) || in tun_not_capable()
583 (gid_valid(tun->group) && !in_egroup_p(tun->group))) && in tun_not_capable()
587 static void tun_set_real_num_queues(struct tun_struct *tun) in tun_set_real_num_queues() argument
589 netif_set_real_num_tx_queues(tun->dev, tun->numqueues); in tun_set_real_num_queues()
590 netif_set_real_num_rx_queues(tun->dev, tun->numqueues); in tun_set_real_num_queues()
593 static void tun_disable_queue(struct tun_struct *tun, struct tun_file *tfile) in tun_disable_queue() argument
595 tfile->detached = tun; in tun_disable_queue()
596 list_add_tail(&tfile->next, &tun->disabled); in tun_disable_queue()
597 ++tun->numdisabled; in tun_disable_queue()
602 struct tun_struct *tun = tfile->detached; in tun_enable_queue() local
606 --tun->numdisabled; in tun_enable_queue()
607 return tun; in tun_enable_queue()
638 struct tun_struct *tun; in __tun_detach() local
640 tun = rtnl_dereference(tfile->tun); in __tun_detach()
642 if (tun && clean) { in __tun_detach()
648 if (tun && !tfile->detached) { in __tun_detach()
650 BUG_ON(index >= tun->numqueues); in __tun_detach()
652 rcu_assign_pointer(tun->tfiles[index], in __tun_detach()
653 tun->tfiles[tun->numqueues - 1]); in __tun_detach()
654 ntfile = rtnl_dereference(tun->tfiles[index]); in __tun_detach()
656 rcu_assign_pointer(tun->tfiles[tun->numqueues - 1], in __tun_detach()
659 --tun->numqueues; in __tun_detach()
661 RCU_INIT_POINTER(tfile->tun, NULL); in __tun_detach()
664 tun_disable_queue(tun, tfile); in __tun_detach()
669 tun_flow_delete_by_queue(tun, tun->numqueues + 1); in __tun_detach()
672 tun_set_real_num_queues(tun); in __tun_detach()
674 tun = tun_enable_queue(tfile); in __tun_detach()
679 if (tun && tun->numqueues == 0 && tun->numdisabled == 0) { in __tun_detach()
680 netif_carrier_off(tun->dev); in __tun_detach()
682 if (!(tun->flags & IFF_PERSIST) && in __tun_detach()
683 tun->dev->reg_state == NETREG_REGISTERED) in __tun_detach()
684 unregister_netdevice(tun->dev); in __tun_detach()
686 if (tun) in __tun_detach()
694 struct tun_struct *tun; in tun_detach() local
698 tun = rtnl_dereference(tfile->tun); in tun_detach()
699 dev = tun ? tun->dev : NULL; in tun_detach()
711 struct tun_struct *tun = netdev_priv(dev); in tun_detach_all() local
713 int i, n = tun->numqueues; in tun_detach_all()
716 tfile = rtnl_dereference(tun->tfiles[i]); in tun_detach_all()
721 RCU_INIT_POINTER(tfile->tun, NULL); in tun_detach_all()
722 --tun->numqueues; in tun_detach_all()
724 list_for_each_entry(tfile, &tun->disabled, next) { in tun_detach_all()
727 RCU_INIT_POINTER(tfile->tun, NULL); in tun_detach_all()
729 BUG_ON(tun->numqueues != 0); in tun_detach_all()
733 tfile = rtnl_dereference(tun->tfiles[i]); in tun_detach_all()
740 list_for_each_entry_safe(tfile, tmp, &tun->disabled, next) { in tun_detach_all()
747 BUG_ON(tun->numdisabled != 0); in tun_detach_all()
749 if (tun->flags & IFF_PERSIST) in tun_detach_all()
753 static int tun_attach(struct tun_struct *tun, struct file *file, in tun_attach() argument
758 struct net_device *dev = tun->dev; in tun_attach()
761 err = security_tun_dev_attach(tfile->socket.sk, tun->security); in tun_attach()
766 if (rtnl_dereference(tfile->tun) && !tfile->detached) in tun_attach()
770 if (!(tun->flags & IFF_MULTI_QUEUE) && tun->numqueues == 1) in tun_attach()
775 tun->numqueues + tun->numdisabled == MAX_TAP_QUEUES) in tun_attach()
781 if (!skip_filter && (tun->filter_attached == true)) { in tun_attach()
783 err = sk_attach_filter(&tun->fprog, tfile->socket.sk); in tun_attach()
796 tfile->queue_index = tun->numqueues; in tun_attach()
808 tun->dev, tfile->queue_index, 0); in tun_attach()
825 tun_napi_init(tun, tfile, napi, napi_frags); in tun_attach()
828 if (rtnl_dereference(tun->xdp_prog)) in tun_attach()
840 rcu_assign_pointer(tfile->tun, tun); in tun_attach()
841 rcu_assign_pointer(tun->tfiles[tun->numqueues], tfile); in tun_attach()
842 tun->numqueues++; in tun_attach()
843 tun_set_real_num_queues(tun); in tun_attach()
850 struct tun_struct *tun; in tun_get() local
853 tun = rcu_dereference(tfile->tun); in tun_get()
854 if (tun) in tun_get()
855 dev_hold(tun->dev); in tun_get()
858 return tun; in tun_get()
861 static void tun_put(struct tun_struct *tun) in tun_put() argument
863 dev_put(tun->dev); in tun_put()
976 struct tun_struct *tun = netdev_priv(dev); in tun_net_init() local
977 struct ifreq *ifr = tun->ifr; in tun_net_init()
984 spin_lock_init(&tun->lock); in tun_net_init()
986 err = security_tun_dev_alloc_security(&tun->security); in tun_net_init()
992 tun_flow_init(tun); in tun_net_init()
1002 tun->flags = (tun->flags & ~TUN_FEATURES) | in tun_net_init()
1005 INIT_LIST_HEAD(&tun->disabled); in tun_net_init()
1006 err = tun_attach(tun, tun->file, false, ifr->ifr_flags & IFF_NAPI, in tun_net_init()
1009 tun_flow_uninit(tun); in tun_net_init()
1010 security_tun_dev_free_security(tun->security); in tun_net_init()
1039 static void tun_automq_xmit(struct tun_struct *tun, struct sk_buff *skb) in tun_automq_xmit() argument
1042 if (tun->numqueues == 1 && static_branch_unlikely(&rps_needed)) { in tun_automq_xmit()
1050 e = tun_flow_find(&tun->flows[tun_hashfn(rxhash)], rxhash); in tun_automq_xmit()
1057 static unsigned int run_ebpf_filter(struct tun_struct *tun, in run_ebpf_filter() argument
1061 struct tun_prog *prog = rcu_dereference(tun->filter_prog); in run_ebpf_filter()
1072 struct tun_struct *tun = netdev_priv(dev); in tun_net_xmit() local
1080 tfile = rcu_dereference(tun->tfiles[txq]); in tun_net_xmit()
1088 if (!rcu_dereference(tun->steering_prog)) in tun_net_xmit()
1089 tun_automq_xmit(tun, skb); in tun_net_xmit()
1091 netif_info(tun, tx_queued, tun->dev, "%s %d\n", __func__, skb->len); in tun_net_xmit()
1096 if (!check_filter(&tun->txflt, skb)) { in tun_net_xmit()
1107 len = run_ebpf_filter(tun, skb, len); in tun_net_xmit()
1169 struct tun_struct *tun = netdev_priv(dev); in tun_net_fix_features() local
1171 return (features & tun->set_features) | (features & ~TUN_USER_FEATURES); in tun_net_fix_features()
1176 struct tun_struct *tun = netdev_priv(dev); in tun_set_headroom() local
1181 tun->align = new_hr; in tun_set_headroom()
1187 struct tun_struct *tun = netdev_priv(dev); in tun_net_get_stats64() local
1192 (unsigned long)atomic_long_read(&tun->rx_frame_errors); in tun_net_get_stats64()
1198 struct tun_struct *tun = netdev_priv(dev); in tun_xdp_set() local
1203 old_prog = rtnl_dereference(tun->xdp_prog); in tun_xdp_set()
1204 rcu_assign_pointer(tun->xdp_prog, prog); in tun_xdp_set()
1208 for (i = 0; i < tun->numqueues; i++) { in tun_xdp_set()
1209 tfile = rtnl_dereference(tun->tfiles[i]); in tun_xdp_set()
1215 list_for_each_entry(tfile, &tun->disabled, next) { in tun_xdp_set()
1238 struct tun_struct *tun = netdev_priv(dev); in tun_net_change_carrier() local
1240 if (!tun->numqueues) in tun_net_change_carrier()
1274 struct tun_struct *tun = netdev_priv(dev); in tun_xdp_xmit() local
1286 numqueues = READ_ONCE(tun->numqueues); in tun_xdp_xmit()
1292 tfile = rcu_dereference(tun->tfiles[smp_processor_id() % in tun_xdp_xmit()
1353 static void tun_flow_init(struct tun_struct *tun) in tun_flow_init() argument
1358 INIT_HLIST_HEAD(&tun->flows[i]); in tun_flow_init()
1360 tun->ageing_time = TUN_FLOW_EXPIRE; in tun_flow_init()
1361 timer_setup(&tun->flow_gc_timer, tun_flow_cleanup, 0); in tun_flow_init()
1362 mod_timer(&tun->flow_gc_timer, in tun_flow_init()
1363 round_jiffies_up(jiffies + tun->ageing_time)); in tun_flow_init()
1366 static void tun_flow_uninit(struct tun_struct *tun) in tun_flow_uninit() argument
1368 del_timer_sync(&tun->flow_gc_timer); in tun_flow_uninit()
1369 tun_flow_flush(tun); in tun_flow_uninit()
1378 struct tun_struct *tun = netdev_priv(dev); in tun_net_initialize() local
1380 switch (tun->flags & TUN_TYPE_MASK) { in tun_net_initialize()
1411 static bool tun_sock_writeable(struct tun_struct *tun, struct tun_file *tfile) in tun_sock_writeable() argument
1415 return (tun->dev->flags & IFF_UP) && sock_writeable(sk); in tun_sock_writeable()
1424 struct tun_struct *tun = tun_get(tfile); in tun_chr_poll() local
1428 if (!tun) in tun_chr_poll()
1443 if (tun_sock_writeable(tun, tfile) || in tun_chr_poll()
1445 tun_sock_writeable(tun, tfile))) in tun_chr_poll()
1448 if (tun->dev->reg_state != NETREG_REGISTERED) in tun_chr_poll()
1451 tun_put(tun); in tun_chr_poll()
1536 static void tun_rx_batched(struct tun_struct *tun, struct tun_file *tfile, in tun_rx_batched() argument
1541 u32 rx_batched = tun->rx_batched; in tun_rx_batched()
1576 static bool tun_can_build_skb(struct tun_struct *tun, struct tun_file *tfile, in tun_can_build_skb() argument
1579 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in tun_can_build_skb()
1617 static int tun_xdp_act(struct tun_struct *tun, struct bpf_prog *xdp_prog, in tun_xdp_act() argument
1624 err = xdp_do_redirect(tun->dev, xdp, xdp_prog); in tun_xdp_act()
1629 err = tun_xdp_tx(tun->dev, xdp); in tun_xdp_act()
1636 bpf_warn_invalid_xdp_action(tun->dev, xdp_prog, act); in tun_xdp_act()
1639 trace_xdp_exception(tun->dev, xdp_prog, act); in tun_xdp_act()
1642 dev_core_stats_rx_dropped_inc(tun->dev); in tun_xdp_act()
1649 static struct sk_buff *tun_build_skb(struct tun_struct *tun, in tun_build_skb() argument
1664 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_build_skb()
1695 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_build_skb()
1708 err = tun_xdp_act(tun, xdp_prog, &xdp, act); in tun_build_skb()
1735 static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, in tun_get_user() argument
1742 size_t len = total_len, align = tun->align, linear; in tun_get_user()
1753 if (!(tun->flags & IFF_NO_PI)) { in tun_get_user()
1762 if (tun->flags & IFF_VNET_HDR) { in tun_get_user()
1763 int vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz); in tun_get_user()
1773 …tun16_to_cpu(tun, gso.csum_start) + tun16_to_cpu(tun, gso.csum_offset) + 2 > tun16_to_cpu(tun, gso… in tun_get_user()
1774 …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()
1776 if (tun16_to_cpu(tun, gso.hdr_len) > len) in tun_get_user()
1781 if ((tun->flags & TUN_TYPE_MASK) == IFF_TAP) { in tun_get_user()
1784 (gso.hdr_len && tun16_to_cpu(tun, gso.hdr_len) < ETH_HLEN))) in tun_get_user()
1797 copylen = gso.hdr_len ? tun16_to_cpu(tun, gso.hdr_len) : GOODCOPY_LEN; in tun_get_user()
1806 if (!frags && tun_can_build_skb(tun, tfile, len, noblock, zerocopy)) { in tun_get_user()
1811 skb = tun_build_skb(tun, tfile, from, &gso, len, &skb_xdp); in tun_get_user()
1813 dev_core_stats_rx_dropped_inc(tun->dev); in tun_get_user()
1821 if (tun16_to_cpu(tun, gso.hdr_len) > good_linear) in tun_get_user()
1824 linear = tun16_to_cpu(tun, gso.hdr_len); in tun_get_user()
1842 dev_core_stats_rx_dropped_inc(tun->dev); in tun_get_user()
1857 dev_core_stats_rx_dropped_inc(tun->dev); in tun_get_user()
1868 if (virtio_net_hdr_to_skb(skb, &gso, tun_is_little_endian(tun))) { in tun_get_user()
1869 atomic_long_inc(&tun->rx_frame_errors); in tun_get_user()
1879 switch (tun->flags & TUN_TYPE_MASK) { in tun_get_user()
1881 if (tun->flags & IFF_NO_PI) { in tun_get_user()
1892 dev_core_stats_rx_dropped_inc(tun->dev); in tun_get_user()
1900 skb->dev = tun->dev; in tun_get_user()
1908 skb->protocol = eth_type_trans(skb, tun->dev); in tun_get_user()
1930 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_get_user()
1951 if (!rcu_access_pointer(tun->steering_prog) && tun->numqueues > 1 && in tun_get_user()
1956 if (unlikely(!(tun->dev->flags & IFF_UP))) { in tun_get_user()
1968 headlen = eth_get_headlen(tun->dev, skb->data, in tun_get_user()
1974 dev_core_stats_rx_dropped_inc(tun->dev); in tun_get_user()
2006 tun_rx_batched(tun, tfile, skb, more); in tun_get_user()
2013 dev_sw_netstats_rx_add(tun->dev, len); in tun_get_user()
2017 tun_flow_update(tun, rxhash, tfile); in tun_get_user()
2026 struct tun_struct *tun = tun_get(tfile); in tun_chr_write_iter() local
2030 if (!tun) in tun_chr_write_iter()
2036 result = tun_get_user(tun, tfile, NULL, from, noblock, false); in tun_chr_write_iter()
2038 tun_put(tun); in tun_chr_write_iter()
2042 static ssize_t tun_put_user_xdp(struct tun_struct *tun, in tun_put_user_xdp() argument
2051 if (tun->flags & IFF_VNET_HDR) { in tun_put_user_xdp()
2054 vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz); in tun_put_user_xdp()
2066 dev_sw_netstats_tx_add(tun->dev, 1, ret); in tun_put_user_xdp()
2073 static ssize_t tun_put_user(struct tun_struct *tun, in tun_put_user() argument
2087 if (tun->flags & IFF_VNET_HDR) in tun_put_user()
2088 vnet_hdr_sz = READ_ONCE(tun->vnet_hdr_sz); in tun_put_user()
2092 if (!(tun->flags & IFF_NO_PI)) { in tun_put_user()
2113 tun_is_little_endian(tun), true, in tun_put_user()
2118 sinfo->gso_type, tun16_to_cpu(tun, gso.gso_size), in tun_put_user()
2119 tun16_to_cpu(tun, gso.hdr_len)); in tun_put_user()
2123 min((int)tun16_to_cpu(tun, gso.hdr_len), 64), true); in tun_put_user()
2157 dev_sw_netstats_tx_add(tun->dev, 1, skb->len + vlan_hlen); in tun_put_user()
2204 static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile, in tun_do_read() argument
2226 ret = tun_put_user_xdp(tun, tfile, xdpf, to); in tun_do_read()
2231 ret = tun_put_user(tun, tfile, skb, to); in tun_do_read()
2245 struct tun_struct *tun = tun_get(tfile); in tun_chr_read_iter() local
2249 if (!tun) in tun_chr_read_iter()
2255 ret = tun_do_read(tun, tfile, to, noblock, NULL); in tun_chr_read_iter()
2259 tun_put(tun); in tun_chr_read_iter()
2271 static int __tun_set_ebpf(struct tun_struct *tun, in __tun_set_ebpf() argument
2284 spin_lock_bh(&tun->lock); in __tun_set_ebpf()
2286 lockdep_is_held(&tun->lock)); in __tun_set_ebpf()
2288 spin_unlock_bh(&tun->lock); in __tun_set_ebpf()
2298 struct tun_struct *tun = netdev_priv(dev); in tun_free_netdev() local
2300 BUG_ON(!(list_empty(&tun->disabled))); in tun_free_netdev()
2303 tun_flow_uninit(tun); in tun_free_netdev()
2304 security_tun_dev_free_security(tun->security); in tun_free_netdev()
2305 __tun_set_ebpf(tun, &tun->steering_prog, NULL); in tun_free_netdev()
2306 __tun_set_ebpf(tun, &tun->filter_prog, NULL); in tun_free_netdev()
2311 struct tun_struct *tun = netdev_priv(dev); in tun_setup() local
2313 tun->owner = INVALID_UID; in tun_setup()
2314 tun->group = INVALID_GID; in tun_setup()
2315 tun_default_link_ksettings(dev, &tun->link_ksettings); in tun_setup()
2354 struct tun_struct *tun = netdev_priv(dev); in tun_fill_info() local
2356 if (nla_put_u8(skb, IFLA_TUN_TYPE, tun->flags & TUN_TYPE_MASK)) in tun_fill_info()
2358 if (uid_valid(tun->owner) && in tun_fill_info()
2360 from_kuid_munged(current_user_ns(), tun->owner))) in tun_fill_info()
2362 if (gid_valid(tun->group) && in tun_fill_info()
2364 from_kgid_munged(current_user_ns(), tun->group))) in tun_fill_info()
2366 if (nla_put_u8(skb, IFLA_TUN_PI, !(tun->flags & IFF_NO_PI))) in tun_fill_info()
2368 if (nla_put_u8(skb, IFLA_TUN_VNET_HDR, !!(tun->flags & IFF_VNET_HDR))) in tun_fill_info()
2370 if (nla_put_u8(skb, IFLA_TUN_PERSIST, !!(tun->flags & IFF_PERSIST))) in tun_fill_info()
2373 !!(tun->flags & IFF_MULTI_QUEUE))) in tun_fill_info()
2375 if (tun->flags & IFF_MULTI_QUEUE) { in tun_fill_info()
2376 if (nla_put_u32(skb, IFLA_TUN_NUM_QUEUES, tun->numqueues)) in tun_fill_info()
2379 tun->numdisabled)) in tun_fill_info()
2424 static int tun_xdp_one(struct tun_struct *tun, in tun_xdp_one() argument
2441 xdp_prog = rcu_dereference(tun->xdp_prog); in tun_xdp_one()
2452 ret = tun_xdp_act(tun, xdp_prog, xdp, act); in tun_xdp_one()
2489 if (virtio_net_hdr_to_skb(skb, gso, tun_is_little_endian(tun))) { in tun_xdp_one()
2490 atomic_long_inc(&tun->rx_frame_errors); in tun_xdp_one()
2496 skb->protocol = eth_type_trans(skb, tun->dev); in tun_xdp_one()
2509 if (!rcu_dereference(tun->steering_prog) && tun->numqueues > 1 && in tun_xdp_one()
2527 dev_sw_netstats_rx_add(tun->dev, datasize); in tun_xdp_one()
2530 tun_flow_update(tun, rxhash, tfile); in tun_xdp_one()
2540 struct tun_struct *tun = tun_get(tfile); in tun_sendmsg() local
2544 if (!tun) in tun_sendmsg()
2560 ret = tun_xdp_one(tun, tfile, xdp, &flush, &tpage); in tun_sendmsg()
2580 ret = tun_get_user(tun, tfile, ctl ? ctl->ptr : NULL, &m->msg_iter, in tun_sendmsg()
2584 tun_put(tun); in tun_sendmsg()
2592 struct tun_struct *tun = tun_get(tfile); in tun_recvmsg() local
2596 if (!tun) { in tun_recvmsg()
2610 ret = tun_do_read(tun, tfile, &m->msg_iter, flags & MSG_DONTWAIT, ptr); in tun_recvmsg()
2616 tun_put(tun); in tun_recvmsg()
2620 tun_put(tun); in tun_recvmsg()
2643 struct tun_struct *tun; in tun_peek_len() local
2646 tun = tun_get(tfile); in tun_peek_len()
2647 if (!tun) in tun_peek_len()
2651 tun_put(tun); in tun_peek_len()
2669 static int tun_flags(struct tun_struct *tun) in tun_flags() argument
2671 return tun->flags & (TUN_FEATURES | IFF_PERSIST | IFF_TUN | IFF_TAP); in tun_flags()
2677 struct tun_struct *tun = netdev_priv(to_net_dev(dev)); in tun_flags_show() local
2678 return sysfs_emit(buf, "0x%x\n", tun_flags(tun)); in tun_flags_show()
2684 struct tun_struct *tun = netdev_priv(to_net_dev(dev)); in owner_show() local
2685 return uid_valid(tun->owner)? in owner_show()
2687 from_kuid_munged(current_user_ns(), tun->owner)) : in owner_show()
2694 struct tun_struct *tun = netdev_priv(to_net_dev(dev)); in group_show() local
2695 return gid_valid(tun->group) ? in group_show()
2697 from_kgid_munged(current_user_ns(), tun->group)) : in group_show()
2718 struct tun_struct *tun; in tun_set_iff() local
2740 tun = netdev_priv(dev); in tun_set_iff()
2742 tun = netdev_priv(dev); in tun_set_iff()
2747 !!(tun->flags & IFF_MULTI_QUEUE)) in tun_set_iff()
2750 if (tun_not_capable(tun)) in tun_set_iff()
2752 err = security_tun_dev_open(tun->security); in tun_set_iff()
2756 err = tun_attach(tun, file, ifr->ifr_flags & IFF_NOFILTER, in tun_set_iff()
2762 if (tun->flags & IFF_MULTI_QUEUE && in tun_set_iff()
2763 (tun->numqueues + tun->numdisabled > 1)) { in tun_set_iff()
2771 tun->flags = (tun->flags & ~TUN_FEATURES) | in tun_set_iff()
2814 tun = netdev_priv(dev); in tun_set_iff()
2815 tun->dev = dev; in tun_set_iff()
2816 tun->flags = flags; in tun_set_iff()
2817 tun->txflt.count = 0; in tun_set_iff()
2818 tun->vnet_hdr_sz = sizeof(struct virtio_net_hdr); in tun_set_iff()
2820 tun->align = NET_SKB_PAD; in tun_set_iff()
2821 tun->filter_attached = false; in tun_set_iff()
2822 tun->sndbuf = tfile->socket.sk->sk_sndbuf; in tun_set_iff()
2823 tun->rx_batched = 0; in tun_set_iff()
2824 RCU_INIT_POINTER(tun->steering_prog, NULL); in tun_set_iff()
2826 tun->ifr = ifr; in tun_set_iff()
2827 tun->file = file; in tun_set_iff()
2831 err = register_netdevice(tun->dev); in tun_set_iff()
2839 rcu_assign_pointer(tfile->tun, tun); in tun_set_iff()
2843 netif_carrier_off(tun->dev); in tun_set_iff()
2845 netif_carrier_on(tun->dev); in tun_set_iff()
2850 if (netif_running(tun->dev)) in tun_set_iff()
2851 netif_tx_wake_all_queues(tun->dev); in tun_set_iff()
2853 strcpy(ifr->ifr_name, tun->dev->name); in tun_set_iff()
2857 static void tun_get_iff(struct tun_struct *tun, struct ifreq *ifr) in tun_get_iff() argument
2859 strcpy(ifr->ifr_name, tun->dev->name); in tun_get_iff()
2861 ifr->ifr_flags = tun_flags(tun); in tun_get_iff()
2867 static int set_offload(struct tun_struct *tun, unsigned long arg) in set_offload() argument
2895 tun->set_features = features; in set_offload()
2896 tun->dev->wanted_features &= ~TUN_USER_FEATURES; in set_offload()
2897 tun->dev->wanted_features |= features; in set_offload()
2898 netdev_update_features(tun->dev); in set_offload()
2903 static void tun_detach_filter(struct tun_struct *tun, int n) in tun_detach_filter() argument
2909 tfile = rtnl_dereference(tun->tfiles[i]); in tun_detach_filter()
2915 tun->filter_attached = false; in tun_detach_filter()
2918 static int tun_attach_filter(struct tun_struct *tun) in tun_attach_filter() argument
2923 for (i = 0; i < tun->numqueues; i++) { in tun_attach_filter()
2924 tfile = rtnl_dereference(tun->tfiles[i]); in tun_attach_filter()
2926 ret = sk_attach_filter(&tun->fprog, tfile->socket.sk); in tun_attach_filter()
2929 tun_detach_filter(tun, i); in tun_attach_filter()
2934 tun->filter_attached = true; in tun_attach_filter()
2938 static void tun_set_sndbuf(struct tun_struct *tun) in tun_set_sndbuf() argument
2943 for (i = 0; i < tun->numqueues; i++) { in tun_set_sndbuf()
2944 tfile = rtnl_dereference(tun->tfiles[i]); in tun_set_sndbuf()
2945 tfile->socket.sk->sk_sndbuf = tun->sndbuf; in tun_set_sndbuf()
2952 struct tun_struct *tun; in tun_set_queue() local
2958 tun = tfile->detached; in tun_set_queue()
2959 if (!tun) { in tun_set_queue()
2963 ret = security_tun_dev_attach_queue(tun->security); in tun_set_queue()
2966 ret = tun_attach(tun, file, false, tun->flags & IFF_NAPI, in tun_set_queue()
2967 tun->flags & IFF_NAPI_FRAGS, true); in tun_set_queue()
2969 tun = rtnl_dereference(tfile->tun); in tun_set_queue()
2970 if (!tun || !(tun->flags & IFF_MULTI_QUEUE) || tfile->detached) in tun_set_queue()
2978 netdev_state_change(tun->dev); in tun_set_queue()
2985 static int tun_set_ebpf(struct tun_struct *tun, struct tun_prog __rcu **prog_p, in tun_set_ebpf() argument
3002 return __tun_set_ebpf(tun, prog_p, prog); in tun_set_ebpf()
3049 struct tun_struct *tun; in __tun_chr_ioctl() local
3085 tun = tun_get(tfile); in __tun_chr_ioctl()
3088 if (tun) in __tun_chr_ioctl()
3104 if (tun) in __tun_chr_ioctl()
3117 if (!tun) in __tun_chr_ioctl()
3120 netif_info(tun, drv, tun->dev, "tun_chr_ioctl cmd %u\n", cmd); in __tun_chr_ioctl()
3122 net = dev_net(tun->dev); in __tun_chr_ioctl()
3126 tun_get_iff(tun, &ifr); in __tun_chr_ioctl()
3141 netif_info(tun, drv, tun->dev, "ignored: set checksum %s\n", in __tun_chr_ioctl()
3149 if (arg && !(tun->flags & IFF_PERSIST)) { in __tun_chr_ioctl()
3150 tun->flags |= IFF_PERSIST; in __tun_chr_ioctl()
3154 if (!arg && (tun->flags & IFF_PERSIST)) { in __tun_chr_ioctl()
3155 tun->flags &= ~IFF_PERSIST; in __tun_chr_ioctl()
3160 netif_info(tun, drv, tun->dev, "persist %s\n", in __tun_chr_ioctl()
3171 tun->owner = owner; in __tun_chr_ioctl()
3173 netif_info(tun, drv, tun->dev, "owner set to %u\n", in __tun_chr_ioctl()
3174 from_kuid(&init_user_ns, tun->owner)); in __tun_chr_ioctl()
3184 tun->group = group; in __tun_chr_ioctl()
3186 netif_info(tun, drv, tun->dev, "group set to %u\n", in __tun_chr_ioctl()
3187 from_kgid(&init_user_ns, tun->group)); in __tun_chr_ioctl()
3192 if (tun->dev->flags & IFF_UP) { in __tun_chr_ioctl()
3193 netif_info(tun, drv, tun->dev, in __tun_chr_ioctl()
3198 tun->dev); in __tun_chr_ioctl()
3201 netif_info(tun, drv, tun->dev, in __tun_chr_ioctl()
3205 tun->dev->type = (int) arg; in __tun_chr_ioctl()
3206 tun->dev->addr_len = tun_get_addr_len(tun->dev->type); in __tun_chr_ioctl()
3207 netif_info(tun, drv, tun->dev, "linktype set to %d\n", in __tun_chr_ioctl()
3208 tun->dev->type); in __tun_chr_ioctl()
3210 tun->dev); in __tun_chr_ioctl()
3215 tun->msg_enable = (u32)arg; in __tun_chr_ioctl()
3219 ret = set_offload(tun, arg); in __tun_chr_ioctl()
3225 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3227 ret = update_filter(&tun->txflt, (void __user *)arg); in __tun_chr_ioctl()
3232 dev_get_mac_address(&ifr.ifr_hwaddr, net, tun->dev->name); in __tun_chr_ioctl()
3239 ret = dev_set_mac_address_user(tun->dev, &ifr.ifr_hwaddr, NULL); in __tun_chr_ioctl()
3258 tun->sndbuf = sndbuf; in __tun_chr_ioctl()
3259 tun_set_sndbuf(tun); in __tun_chr_ioctl()
3263 vnet_hdr_sz = tun->vnet_hdr_sz; in __tun_chr_ioctl()
3278 tun->vnet_hdr_sz = vnet_hdr_sz; in __tun_chr_ioctl()
3282 le = !!(tun->flags & TUN_VNET_LE); in __tun_chr_ioctl()
3293 tun->flags |= TUN_VNET_LE; in __tun_chr_ioctl()
3295 tun->flags &= ~TUN_VNET_LE; in __tun_chr_ioctl()
3299 ret = tun_get_vnet_be(tun, argp); in __tun_chr_ioctl()
3303 ret = tun_set_vnet_be(tun, argp); in __tun_chr_ioctl()
3309 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3312 if (copy_from_user(&tun->fprog, argp, sizeof(tun->fprog))) in __tun_chr_ioctl()
3315 ret = tun_attach_filter(tun); in __tun_chr_ioctl()
3321 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3324 tun_detach_filter(tun, tun->numqueues); in __tun_chr_ioctl()
3329 if ((tun->flags & TUN_TYPE_MASK) != IFF_TAP) in __tun_chr_ioctl()
3332 if (copy_to_user(argp, &tun->fprog, sizeof(tun->fprog))) in __tun_chr_ioctl()
3338 ret = tun_set_ebpf(tun, &tun->steering_prog, argp); in __tun_chr_ioctl()
3342 ret = tun_set_ebpf(tun, &tun->filter_prog, argp); in __tun_chr_ioctl()
3350 ret = tun_net_change_carrier(tun->dev, (bool)carrier); in __tun_chr_ioctl()
3366 netdev_state_change(tun->dev); in __tun_chr_ioctl()
3370 if (tun) in __tun_chr_ioctl()
3371 tun_put(tun); in __tun_chr_ioctl()
3443 RCU_INIT_POINTER(tfile->tun, NULL); in tun_chr_open()
3478 struct tun_struct *tun; in tun_chr_show_fdinfo() local
3484 tun = tun_get(tfile); in tun_chr_show_fdinfo()
3485 if (tun) in tun_chr_show_fdinfo()
3486 tun_get_iff(tun, &ifr); in tun_chr_show_fdinfo()
3489 if (tun) in tun_chr_show_fdinfo()
3490 tun_put(tun); in tun_chr_show_fdinfo()
3538 struct tun_struct *tun = netdev_priv(dev); in tun_get_link_ksettings() local
3540 memcpy(cmd, &tun->link_ksettings, sizeof(*cmd)); in tun_get_link_ksettings()
3547 struct tun_struct *tun = netdev_priv(dev); in tun_set_link_ksettings() local
3549 memcpy(&tun->link_ksettings, cmd, sizeof(*cmd)); in tun_set_link_ksettings()
3555 struct tun_struct *tun = netdev_priv(dev); in tun_get_drvinfo() local
3560 switch (tun->flags & TUN_TYPE_MASK) { in tun_get_drvinfo()
3572 struct tun_struct *tun = netdev_priv(dev); in tun_get_msglevel() local
3574 return tun->msg_enable; in tun_get_msglevel()
3579 struct tun_struct *tun = netdev_priv(dev); in tun_set_msglevel() local
3581 tun->msg_enable = value; in tun_set_msglevel()
3589 struct tun_struct *tun = netdev_priv(dev); in tun_get_coalesce() local
3591 ec->rx_max_coalesced_frames = tun->rx_batched; in tun_get_coalesce()
3601 struct tun_struct *tun = netdev_priv(dev); in tun_set_coalesce() local
3604 tun->rx_batched = NAPI_POLL_WEIGHT; in tun_set_coalesce()
3606 tun->rx_batched = ec->rx_max_coalesced_frames; in tun_set_coalesce()
3624 static int tun_queue_resize(struct tun_struct *tun) in tun_queue_resize() argument
3626 struct net_device *dev = tun->dev; in tun_queue_resize()
3629 int n = tun->numqueues + tun->numdisabled; in tun_queue_resize()
3636 for (i = 0; i < tun->numqueues; i++) { in tun_queue_resize()
3637 tfile = rtnl_dereference(tun->tfiles[i]); in tun_queue_resize()
3640 list_for_each_entry(tfile, &tun->disabled, next) in tun_queue_resize()
3655 struct tun_struct *tun = netdev_priv(dev); in tun_device_event() local
3663 if (tun_queue_resize(tun)) in tun_device_event()
3667 for (i = 0; i < tun->numqueues; i++) { in tun_device_event()
3670 tfile = rtnl_dereference(tun->tfiles[i]); in tun_device_event()