Lines Matching refs:tap
143 static int tap_enable_queue(struct tap_dev *tap, struct file *file, in tap_enable_queue() argument
154 rcu_assign_pointer(tap->taps[tap->numvtaps], q); in tap_enable_queue()
155 q->queue_index = tap->numvtaps; in tap_enable_queue()
158 tap->numvtaps++; in tap_enable_queue()
164 static int tap_set_queue(struct tap_dev *tap, struct file *file, in tap_set_queue() argument
167 if (tap->numqueues == MAX_TAP_QUEUES) in tap_set_queue()
170 rcu_assign_pointer(q->tap, tap); in tap_set_queue()
171 rcu_assign_pointer(tap->taps[tap->numvtaps], q); in tap_set_queue()
175 q->queue_index = tap->numvtaps; in tap_set_queue()
178 list_add_tail(&q->next, &tap->queue_list); in tap_set_queue()
180 tap->numvtaps++; in tap_set_queue()
181 tap->numqueues++; in tap_set_queue()
188 struct tap_dev *tap; in tap_disable_queue() local
195 tap = rtnl_dereference(q->tap); in tap_disable_queue()
197 if (tap) { in tap_disable_queue()
199 BUG_ON(index >= tap->numvtaps); in tap_disable_queue()
200 nq = rtnl_dereference(tap->taps[tap->numvtaps - 1]); in tap_disable_queue()
203 rcu_assign_pointer(tap->taps[index], nq); in tap_disable_queue()
204 RCU_INIT_POINTER(tap->taps[tap->numvtaps - 1], NULL); in tap_disable_queue()
207 tap->numvtaps--; in tap_disable_queue()
223 struct tap_dev *tap; in tap_put_queue() local
226 tap = rtnl_dereference(q->tap); in tap_put_queue()
228 if (tap) { in tap_put_queue()
232 tap->numqueues--; in tap_put_queue()
233 RCU_INIT_POINTER(q->tap, NULL); in tap_put_queue()
251 static struct tap_queue *tap_get_queue(struct tap_dev *tap, in tap_get_queue() argument
260 int numvtaps = READ_ONCE(tap->numvtaps); in tap_get_queue()
272 queue = rcu_dereference(tap->taps[rxq % numvtaps]); in tap_get_queue()
282 queue = rcu_dereference(tap->taps[rxq]); in tap_get_queue()
287 queue = rcu_dereference(tap->taps[0]); in tap_get_queue()
297 void tap_del_queues(struct tap_dev *tap) in tap_del_queues() argument
302 list_for_each_entry_safe(q, tmp, &tap->queue_list, next) { in tap_del_queues()
304 RCU_INIT_POINTER(q->tap, NULL); in tap_del_queues()
306 tap->numvtaps--; in tap_del_queues()
307 tap->numqueues--; in tap_del_queues()
310 BUG_ON(tap->numvtaps); in tap_del_queues()
311 BUG_ON(tap->numqueues); in tap_del_queues()
313 tap->numvtaps = MAX_TAP_QUEUES; in tap_del_queues()
321 struct tap_dev *tap; in tap_handle_frame() local
325 tap = tap_dev_get_rcu(dev); in tap_handle_frame()
326 if (!tap) in tap_handle_frame()
329 q = tap_get_queue(tap, skb); in tap_handle_frame()
340 features |= tap->tap_features; in tap_handle_frame()
385 if (tap->count_rx_dropped) in tap_handle_frame()
386 tap->count_rx_dropped(tap); in tap_handle_frame()
404 int tap_get_minor(dev_t major, struct tap_dev *tap) in tap_get_minor() argument
417 retval = idr_alloc(&tap_major->minor_idr, tap, 1, TAP_NUM_DEVS, GFP_ATOMIC); in tap_get_minor()
419 tap->minor = retval; in tap_get_minor()
421 netdev_err(tap->dev, "Too many tap devices\n"); in tap_get_minor()
432 void tap_free_minor(dev_t major, struct tap_dev *tap) in tap_free_minor() argument
443 if (tap->minor) { in tap_free_minor()
444 idr_remove(&tap_major->minor_idr, tap->minor); in tap_free_minor()
445 tap->minor = 0; in tap_free_minor()
457 struct tap_dev *tap; in dev_get_by_tap_file() local
463 tap = NULL; in dev_get_by_tap_file()
468 tap = idr_find(&tap_major->minor_idr, minor); in dev_get_by_tap_file()
469 if (tap) { in dev_get_by_tap_file()
470 dev = tap->dev; in dev_get_by_tap_file()
477 return tap; in dev_get_by_tap_file()
503 struct tap_dev *tap; in tap_open() local
508 tap = dev_get_by_tap_file(imajor(inode), iminor(inode)); in tap_open()
509 if (!tap) in tap_open()
517 if (ptr_ring_init(&q->ring, tap->dev->tx_queue_len, GFP_KERNEL)) { in tap_open()
541 if ((tap->dev->features & NETIF_F_HIGHDMA) && (tap->dev->features & NETIF_F_SG)) in tap_open()
544 err = tap_set_queue(tap, file, q); in tap_open()
550 dev_put(tap->dev); in tap_open()
558 if (tap) in tap_open()
559 dev_put(tap->dev); in tap_open()
627 struct tap_dev *tap; in tap_get_user() local
724 tap = rcu_dereference(q->tap); in tap_get_user()
735 if (tap) { in tap_get_user()
736 skb->dev = tap->dev; in tap_get_user()
750 tap = rcu_dereference(q->tap); in tap_get_user()
751 if (tap && tap->count_tx_dropped) in tap_get_user()
752 tap->count_tx_dropped(tap); in tap_get_user()
890 struct tap_dev *tap; in tap_get_tap_dev() local
893 tap = rtnl_dereference(q->tap); in tap_get_tap_dev()
894 if (tap) in tap_get_tap_dev()
895 dev_hold(tap->dev); in tap_get_tap_dev()
897 return tap; in tap_get_tap_dev()
900 static void tap_put_tap_dev(struct tap_dev *tap) in tap_put_tap_dev() argument
902 dev_put(tap->dev); in tap_put_tap_dev()
908 struct tap_dev *tap; in tap_ioctl_set_queue() local
911 tap = tap_get_tap_dev(q); in tap_ioctl_set_queue()
912 if (!tap) in tap_ioctl_set_queue()
916 ret = tap_enable_queue(tap, file, q); in tap_ioctl_set_queue()
922 tap_put_tap_dev(tap); in tap_ioctl_set_queue()
928 struct tap_dev *tap; in set_offload() local
932 tap = rtnl_dereference(q->tap); in set_offload()
933 if (!tap) in set_offload()
936 features = tap->dev->features; in set_offload()
967 tap->tap_features = feature_mask; in set_offload()
968 if (tap->update_features) in set_offload()
969 tap->update_features(tap, features); in set_offload()
981 struct tap_dev *tap; in tap_ioctl() local
1007 tap = tap_get_tap_dev(q); in tap_ioctl()
1008 if (!tap) { in tap_ioctl()
1015 if (copy_to_user(&ifr->ifr_name, tap->dev->name, IFNAMSIZ) || in tap_ioctl()
1018 tap_put_tap_dev(tap); in tap_ioctl()
1093 tap = tap_get_tap_dev(q); in tap_ioctl()
1094 if (!tap) { in tap_ioctl()
1099 u = tap->dev->type; in tap_ioctl()
1100 if (copy_to_user(&ifr->ifr_name, tap->dev->name, IFNAMSIZ) || in tap_ioctl()
1101 copy_to_user(&ifr->ifr_hwaddr.sa_data, tap->dev->dev_addr, ETH_ALEN) || in tap_ioctl()
1104 tap_put_tap_dev(tap); in tap_ioctl()
1112 tap = tap_get_tap_dev(q); in tap_ioctl()
1113 if (!tap) { in tap_ioctl()
1117 ret = dev_set_mac_address(tap->dev, &sa); in tap_ioctl()
1118 tap_put_tap_dev(tap); in tap_ioctl()
1218 int tap_queue_resize(struct tap_dev *tap) in tap_queue_resize() argument
1220 struct net_device *dev = tap->dev; in tap_queue_resize()
1223 int n = tap->numqueues; in tap_queue_resize()
1230 list_for_each_entry(q, &tap->queue_list, next) in tap_queue_resize()