1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* net/atm/raw.c - Raw AAL0 and AAL5 transport 1 /* net/atm/raw.c - Raw AAL0 and AAL5 transports */
3 2
4 /* Written 1995-2000 by Werner Almesberger, EP 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
5 4
6 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt 5 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
7 6
8 #include <linux/module.h> 7 #include <linux/module.h>
9 #include <linux/atmdev.h> 8 #include <linux/atmdev.h>
10 #include <linux/capability.h> 9 #include <linux/capability.h>
11 #include <linux/kernel.h> 10 #include <linux/kernel.h>
12 #include <linux/skbuff.h> 11 #include <linux/skbuff.h>
13 #include <linux/mm.h> 12 #include <linux/mm.h>
14 #include <linux/slab.h> 13 #include <linux/slab.h>
15 14
16 #include "common.h" 15 #include "common.h"
17 #include "protocols.h" 16 #include "protocols.h"
18 17
19 /* 18 /*
20 * SKB == NULL indicates that the link is bein 19 * SKB == NULL indicates that the link is being closed
21 */ 20 */
22 21
23 static void atm_push_raw(struct atm_vcc *vcc, 22 static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb)
24 { 23 {
25 if (skb) { 24 if (skb) {
26 struct sock *sk = sk_atm(vcc); 25 struct sock *sk = sk_atm(vcc);
27 26
28 skb_queue_tail(&sk->sk_receive 27 skb_queue_tail(&sk->sk_receive_queue, skb);
29 sk->sk_data_ready(sk); 28 sk->sk_data_ready(sk);
30 } 29 }
31 } 30 }
32 31
33 static void atm_pop_raw(struct atm_vcc *vcc, s 32 static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb)
34 { 33 {
35 struct sock *sk = sk_atm(vcc); 34 struct sock *sk = sk_atm(vcc);
36 35
37 pr_debug("(%d) %d -= %d\n", 36 pr_debug("(%d) %d -= %d\n",
38 vcc->vci, sk_wmem_alloc_get(s !! 37 vcc->vci, sk_wmem_alloc_get(sk), skb->truesize);
39 WARN_ON(refcount_sub_and_test(ATM_SKB( !! 38 atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
40 dev_kfree_skb_any(skb); 39 dev_kfree_skb_any(skb);
41 sk->sk_write_space(sk); 40 sk->sk_write_space(sk);
42 } 41 }
43 42
44 static int atm_send_aal0(struct atm_vcc *vcc, 43 static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb)
45 { 44 {
46 /* 45 /*
47 * Note that if vpi/vci are _ANY or _U 46 * Note that if vpi/vci are _ANY or _UNSPEC the below will
48 * still work 47 * still work
49 */ 48 */
50 if (!capable(CAP_NET_ADMIN) && 49 if (!capable(CAP_NET_ADMIN) &&
51 (((u32 *)skb->data)[0] & (ATM_HDR_ 50 (((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
52 ((vcc->vpi << ATM_HDR_VPI_SHIFT) | 51 ((vcc->vpi << ATM_HDR_VPI_SHIFT) |
53 (vcc->vci << ATM_HDR_VCI_SHIFT))) 52 (vcc->vci << ATM_HDR_VCI_SHIFT))) {
54 kfree_skb(skb); 53 kfree_skb(skb);
55 return -EADDRNOTAVAIL; 54 return -EADDRNOTAVAIL;
56 } 55 }
57 if (vcc->dev->ops->send_bh) <<
58 return vcc->dev->ops->send_bh( <<
59 return vcc->dev->ops->send(vcc, skb); 56 return vcc->dev->ops->send(vcc, skb);
60 } 57 }
61 58
62 int atm_init_aal0(struct atm_vcc *vcc) 59 int atm_init_aal0(struct atm_vcc *vcc)
63 { 60 {
64 vcc->push = atm_push_raw; 61 vcc->push = atm_push_raw;
65 vcc->pop = atm_pop_raw; 62 vcc->pop = atm_pop_raw;
66 vcc->push_oam = NULL; 63 vcc->push_oam = NULL;
67 vcc->send = atm_send_aal0; 64 vcc->send = atm_send_aal0;
68 return 0; 65 return 0;
69 } 66 }
70 67
71 int atm_init_aal34(struct atm_vcc *vcc) 68 int atm_init_aal34(struct atm_vcc *vcc)
72 { 69 {
73 vcc->push = atm_push_raw; 70 vcc->push = atm_push_raw;
74 vcc->pop = atm_pop_raw; 71 vcc->pop = atm_pop_raw;
75 vcc->push_oam = NULL; 72 vcc->push_oam = NULL;
76 if (vcc->dev->ops->send_bh) !! 73 vcc->send = vcc->dev->ops->send;
77 vcc->send = vcc->dev->ops->sen <<
78 else <<
79 vcc->send = vcc->dev->ops->sen <<
80 return 0; 74 return 0;
81 } 75 }
82 76
83 int atm_init_aal5(struct atm_vcc *vcc) 77 int atm_init_aal5(struct atm_vcc *vcc)
84 { 78 {
85 vcc->push = atm_push_raw; 79 vcc->push = atm_push_raw;
86 vcc->pop = atm_pop_raw; 80 vcc->pop = atm_pop_raw;
87 vcc->push_oam = NULL; 81 vcc->push_oam = NULL;
88 if (vcc->dev->ops->send_bh) !! 82 vcc->send = vcc->dev->ops->send;
89 vcc->send = vcc->dev->ops->sen <<
90 else <<
91 vcc->send = vcc->dev->ops->sen <<
92 return 0; 83 return 0;
93 } 84 }
94 EXPORT_SYMBOL(atm_init_aal5); 85 EXPORT_SYMBOL(atm_init_aal5);
95 86
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