Lines Matching refs:tap
81 static int tap_enable_queue(struct tap_dev *tap, struct file *file, in tap_enable_queue() argument
92 rcu_assign_pointer(tap->taps[tap->numvtaps], q); in tap_enable_queue()
93 q->queue_index = tap->numvtaps; in tap_enable_queue()
96 tap->numvtaps++; in tap_enable_queue()
102 static int tap_set_queue(struct tap_dev *tap, struct file *file, in tap_set_queue() argument
105 if (tap->numqueues == MAX_TAP_QUEUES) in tap_set_queue()
108 rcu_assign_pointer(q->tap, tap); in tap_set_queue()
109 rcu_assign_pointer(tap->taps[tap->numvtaps], q); in tap_set_queue()
113 q->queue_index = tap->numvtaps; in tap_set_queue()
116 list_add_tail(&q->next, &tap->queue_list); in tap_set_queue()
118 tap->numvtaps++; in tap_set_queue()
119 tap->numqueues++; in tap_set_queue()
126 struct tap_dev *tap; in tap_disable_queue() local
133 tap = rtnl_dereference(q->tap); in tap_disable_queue()
135 if (tap) { in tap_disable_queue()
137 BUG_ON(index >= tap->numvtaps); in tap_disable_queue()
138 nq = rtnl_dereference(tap->taps[tap->numvtaps - 1]); in tap_disable_queue()
141 rcu_assign_pointer(tap->taps[index], nq); in tap_disable_queue()
142 RCU_INIT_POINTER(tap->taps[tap->numvtaps - 1], NULL); in tap_disable_queue()
145 tap->numvtaps--; in tap_disable_queue()
161 struct tap_dev *tap; in tap_put_queue() local
164 tap = rtnl_dereference(q->tap); in tap_put_queue()
166 if (tap) { in tap_put_queue()
170 tap->numqueues--; in tap_put_queue()
171 RCU_INIT_POINTER(q->tap, NULL); in tap_put_queue()
189 static struct tap_queue *tap_get_queue(struct tap_dev *tap, in tap_get_queue() argument
198 int numvtaps = READ_ONCE(tap->numvtaps); in tap_get_queue()
210 queue = rcu_dereference(tap->taps[rxq % numvtaps]); in tap_get_queue()
220 queue = rcu_dereference(tap->taps[rxq]); in tap_get_queue()
225 queue = rcu_dereference(tap->taps[0]); in tap_get_queue()
235 void tap_del_queues(struct tap_dev *tap) in tap_del_queues() argument
240 list_for_each_entry_safe(q, tmp, &tap->queue_list, next) { in tap_del_queues()
242 RCU_INIT_POINTER(q->tap, NULL); in tap_del_queues()
244 tap->numvtaps--; in tap_del_queues()
245 tap->numqueues--; in tap_del_queues()
248 BUG_ON(tap->numvtaps); in tap_del_queues()
249 BUG_ON(tap->numqueues); in tap_del_queues()
251 tap->numvtaps = MAX_TAP_QUEUES; in tap_del_queues()
259 struct tap_dev *tap; in tap_handle_frame() local
264 tap = tap_dev_get_rcu(dev); in tap_handle_frame()
265 if (!tap) in tap_handle_frame()
268 q = tap_get_queue(tap, skb); in tap_handle_frame()
279 features |= tap->tap_features; in tap_handle_frame()
331 if (tap->count_rx_dropped) in tap_handle_frame()
332 tap->count_rx_dropped(tap); in tap_handle_frame()
350 int tap_get_minor(dev_t major, struct tap_dev *tap) in tap_get_minor() argument
363 retval = idr_alloc(&tap_major->minor_idr, tap, 1, TAP_NUM_DEVS, GFP_ATOMIC); in tap_get_minor()
365 tap->minor = retval; in tap_get_minor()
367 netdev_err(tap->dev, "Too many tap devices\n"); in tap_get_minor()
378 void tap_free_minor(dev_t major, struct tap_dev *tap) in tap_free_minor() argument
389 if (tap->minor) { in tap_free_minor()
390 idr_remove(&tap_major->minor_idr, tap->minor); in tap_free_minor()
391 tap->minor = 0; in tap_free_minor()
403 struct tap_dev *tap; in dev_get_by_tap_file() local
409 tap = NULL; in dev_get_by_tap_file()
414 tap = idr_find(&tap_major->minor_idr, minor); in dev_get_by_tap_file()
415 if (tap) { in dev_get_by_tap_file()
416 dev = tap->dev; in dev_get_by_tap_file()
423 return tap; in dev_get_by_tap_file()
449 struct tap_dev *tap; in tap_open() local
454 tap = dev_get_by_tap_file(imajor(inode), iminor(inode)); in tap_open()
455 if (!tap) in tap_open()
463 if (ptr_ring_init(&q->ring, tap->dev->tx_queue_len, GFP_KERNEL)) { in tap_open()
486 if ((tap->dev->features & NETIF_F_HIGHDMA) && (tap->dev->features & NETIF_F_SG)) in tap_open()
489 err = tap_set_queue(tap, file, q); in tap_open()
498 dev_put(tap->dev); in tap_open()
506 if (tap) in tap_open()
507 dev_put(tap->dev); in tap_open()
577 struct tap_dev *tap; in tap_get_user() local
642 tap = rcu_dereference(q->tap); in tap_get_user()
643 if (!tap) { in tap_get_user()
648 skb->dev = tap->dev; in tap_get_user()
683 tap = rcu_dereference(q->tap); in tap_get_user()
684 if (tap && tap->count_tx_dropped) in tap_get_user()
685 tap->count_tx_dropped(tap); in tap_get_user()
824 struct tap_dev *tap; in tap_get_tap_dev() local
827 tap = rtnl_dereference(q->tap); in tap_get_tap_dev()
828 if (tap) in tap_get_tap_dev()
829 dev_hold(tap->dev); in tap_get_tap_dev()
831 return tap; in tap_get_tap_dev()
834 static void tap_put_tap_dev(struct tap_dev *tap) in tap_put_tap_dev() argument
836 dev_put(tap->dev); in tap_put_tap_dev()
842 struct tap_dev *tap; in tap_ioctl_set_queue() local
845 tap = tap_get_tap_dev(q); in tap_ioctl_set_queue()
846 if (!tap) in tap_ioctl_set_queue()
850 ret = tap_enable_queue(tap, file, q); in tap_ioctl_set_queue()
856 tap_put_tap_dev(tap); in tap_ioctl_set_queue()
862 struct tap_dev *tap; in set_offload() local
866 tap = rtnl_dereference(q->tap); in set_offload()
867 if (!tap) in set_offload()
870 features = tap->dev->features; in set_offload()
906 tap->tap_features = feature_mask; in set_offload()
907 if (tap->update_features) in set_offload()
908 tap->update_features(tap, features); in set_offload()
920 struct tap_dev *tap; in tap_ioctl() local
946 tap = tap_get_tap_dev(q); in tap_ioctl()
947 if (!tap) { in tap_ioctl()
954 if (copy_to_user(&ifr->ifr_name, tap->dev->name, IFNAMSIZ) || in tap_ioctl()
957 tap_put_tap_dev(tap); in tap_ioctl()
997 tap = tap_get_tap_dev(q); in tap_ioctl()
998 if (!tap) { in tap_ioctl()
1003 netif_get_mac_address((struct sockaddr *)&ss, dev_net(tap->dev), in tap_ioctl()
1004 tap->dev->name); in tap_ioctl()
1005 if (copy_to_user(&ifr->ifr_name, tap->dev->name, IFNAMSIZ) || in tap_ioctl()
1008 tap_put_tap_dev(tap); in tap_ioctl()
1016 tap = tap_get_tap_dev(q); in tap_ioctl()
1017 if (!tap) { in tap_ioctl()
1021 if (tap->dev->addr_len > sizeof(ifr->ifr_hwaddr)) in tap_ioctl()
1024 ret = dev_set_mac_address_user(tap->dev, &ss, NULL); in tap_ioctl()
1025 tap_put_tap_dev(tap); in tap_ioctl()
1050 struct tap_dev *tap; in tap_get_user_xdp() local
1087 tap = rcu_dereference(q->tap); in tap_get_user_xdp()
1088 if (tap) { in tap_get_user_xdp()
1089 skb->dev = tap->dev; in tap_get_user_xdp()
1103 tap = rcu_dereference(q->tap); in tap_get_user_xdp()
1104 if (tap && tap->count_tx_dropped) in tap_get_user_xdp()
1105 tap->count_tx_dropped(tap); in tap_get_user_xdp()
1192 int tap_queue_resize(struct tap_dev *tap) in tap_queue_resize() argument
1194 struct net_device *dev = tap->dev; in tap_queue_resize()
1197 int n = tap->numqueues; in tap_queue_resize()
1204 list_for_each_entry(q, &tap->queue_list, next) in tap_queue_resize()