1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * 3 *
4 * Copyright Tomi Manninen OH2BNS (oh2bns@sral 4 * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
5 */ 5 */
6 #include <linux/types.h> 6 #include <linux/types.h>
7 #include <linux/slab.h> 7 #include <linux/slab.h>
8 #include <linux/socket.h> 8 #include <linux/socket.h>
9 #include <linux/timer.h> 9 #include <linux/timer.h>
10 #include <net/ax25.h> 10 #include <net/ax25.h>
11 #include <linux/skbuff.h> 11 #include <linux/skbuff.h>
12 #include <net/netrom.h> 12 #include <net/netrom.h>
13 #include <linux/init.h> 13 #include <linux/init.h>
14 14
15 static void nr_loopback_timer(struct timer_lis 15 static void nr_loopback_timer(struct timer_list *);
16 16
17 static struct sk_buff_head loopback_queue; 17 static struct sk_buff_head loopback_queue;
18 static DEFINE_TIMER(loopback_timer, nr_loopbac 18 static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
19 19
20 void __init nr_loopback_init(void) 20 void __init nr_loopback_init(void)
21 { 21 {
22 skb_queue_head_init(&loopback_queue); 22 skb_queue_head_init(&loopback_queue);
23 } 23 }
24 24
25 static inline int nr_loopback_running(void) 25 static inline int nr_loopback_running(void)
26 { 26 {
27 return timer_pending(&loopback_timer); 27 return timer_pending(&loopback_timer);
28 } 28 }
29 29
30 int nr_loopback_queue(struct sk_buff *skb) 30 int nr_loopback_queue(struct sk_buff *skb)
31 { 31 {
32 struct sk_buff *skbn; 32 struct sk_buff *skbn;
33 33
34 if ((skbn = alloc_skb(skb->len, GFP_AT 34 if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
35 skb_copy_from_linear_data(skb, 35 skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
36 skb_reset_transport_header(skb 36 skb_reset_transport_header(skbn);
37 37
38 skb_queue_tail(&loopback_queue 38 skb_queue_tail(&loopback_queue, skbn);
39 39
40 if (!nr_loopback_running()) 40 if (!nr_loopback_running())
41 mod_timer(&loopback_ti 41 mod_timer(&loopback_timer, jiffies + 10);
42 } 42 }
43 43
44 kfree_skb(skb); 44 kfree_skb(skb);
45 return 1; 45 return 1;
46 } 46 }
47 47
48 static void nr_loopback_timer(struct timer_lis 48 static void nr_loopback_timer(struct timer_list *unused)
49 { 49 {
50 struct sk_buff *skb; 50 struct sk_buff *skb;
51 ax25_address *nr_dest; 51 ax25_address *nr_dest;
52 struct net_device *dev; 52 struct net_device *dev;
53 53
54 if ((skb = skb_dequeue(&loopback_queue 54 if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
55 nr_dest = (ax25_address *)(skb 55 nr_dest = (ax25_address *)(skb->data + 7);
56 56
57 dev = nr_dev_get(nr_dest); 57 dev = nr_dev_get(nr_dest);
58 58
59 if (dev == NULL || nr_rx_frame 59 if (dev == NULL || nr_rx_frame(skb, dev) == 0)
60 kfree_skb(skb); 60 kfree_skb(skb);
61 61
62 dev_put(dev); 62 dev_put(dev);
63 63
64 if (!skb_queue_empty(&loopback 64 if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
65 mod_timer(&loopback_ti 65 mod_timer(&loopback_timer, jiffies + 10);
66 } 66 }
67 } 67 }
68 68
69 void nr_loopback_clear(void) 69 void nr_loopback_clear(void)
70 { 70 {
71 del_timer_sync(&loopback_timer); 71 del_timer_sync(&loopback_timer);
72 skb_queue_purge(&loopback_queue); 72 skb_queue_purge(&loopback_queue);
73 } 73 }
74 74
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