Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* ATM ioctl handling */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | /* 2003 John Levon <levon@movementarian.org> */ | |
5 | ||
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/kmod.h> | |
9 | #include <linux/net.h> /* struct socket, struct proto_ops */ | |
10 | #include <linux/atm.h> /* ATM stuff */ | |
11 | #include <linux/atmdev.h> | |
12 | #include <linux/atmclip.h> /* CLIP_*ENCAP */ | |
13 | #include <linux/atmarp.h> /* manifest constants */ | |
4fc268d2 | 14 | #include <linux/capability.h> |
1da177e4 LT |
15 | #include <linux/sonet.h> /* for ioctls */ |
16 | #include <linux/atmsvc.h> | |
17 | #include <linux/atmmpc.h> | |
18 | #include <net/atmclip.h> | |
19 | #include <linux/atmlec.h> | |
4a3e2f71 | 20 | #include <linux/mutex.h> |
1da177e4 | 21 | #include <asm/ioctls.h> |
8865c418 | 22 | #include <net/compat.h> |
1da177e4 LT |
23 | |
24 | #include "resources.h" | |
25 | #include "signaling.h" /* for WAITING and sigd_attach */ | |
295098e9 | 26 | #include "common.h" |
1da177e4 LT |
27 | |
28 | ||
4a3e2f71 | 29 | static DEFINE_MUTEX(ioctl_mutex); |
1da177e4 LT |
30 | static LIST_HEAD(ioctl_list); |
31 | ||
32 | ||
33 | void register_atm_ioctl(struct atm_ioctl *ioctl) | |
34 | { | |
4a3e2f71 | 35 | mutex_lock(&ioctl_mutex); |
1da177e4 | 36 | list_add_tail(&ioctl->list, &ioctl_list); |
4a3e2f71 | 37 | mutex_unlock(&ioctl_mutex); |
1da177e4 LT |
38 | } |
39 | ||
40 | void deregister_atm_ioctl(struct atm_ioctl *ioctl) | |
41 | { | |
4a3e2f71 | 42 | mutex_lock(&ioctl_mutex); |
1da177e4 | 43 | list_del(&ioctl->list); |
4a3e2f71 | 44 | mutex_unlock(&ioctl_mutex); |
1da177e4 LT |
45 | } |
46 | ||
47 | EXPORT_SYMBOL(register_atm_ioctl); | |
48 | EXPORT_SYMBOL(deregister_atm_ioctl); | |
49 | ||
8865c418 | 50 | static int do_vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg, int compat) |
1da177e4 LT |
51 | { |
52 | struct sock *sk = sock->sk; | |
53 | struct atm_vcc *vcc; | |
54 | int error; | |
55 | struct list_head * pos; | |
56 | void __user *argp = (void __user *)arg; | |
57 | ||
58 | vcc = ATM_SD(sock); | |
59 | switch (cmd) { | |
60 | case SIOCOUTQ: | |
61 | if (sock->state != SS_CONNECTED || | |
62 | !test_bit(ATM_VF_READY, &vcc->flags)) { | |
63 | error = -EINVAL; | |
64 | goto done; | |
65 | } | |
66 | error = put_user(sk->sk_sndbuf - | |
67 | atomic_read(&sk->sk_wmem_alloc), | |
68 | (int __user *) argp) ? -EFAULT : 0; | |
69 | goto done; | |
70 | case SIOCINQ: | |
71 | { | |
72 | struct sk_buff *skb; | |
73 | ||
74 | if (sock->state != SS_CONNECTED) { | |
75 | error = -EINVAL; | |
76 | goto done; | |
77 | } | |
78 | skb = skb_peek(&sk->sk_receive_queue); | |
79 | error = put_user(skb ? skb->len : 0, | |
f7d57453 | 80 | (int __user *)argp) ? -EFAULT : 0; |
1da177e4 LT |
81 | goto done; |
82 | } | |
83 | case SIOCGSTAMP: /* borrowed from IP */ | |
8865c418 DW |
84 | #ifdef CONFIG_COMPAT |
85 | if (compat) | |
86 | error = compat_sock_get_timestamp(sk, argp); | |
87 | else | |
88 | #endif | |
89 | error = sock_get_timestamp(sk, argp); | |
1da177e4 | 90 | goto done; |
ae40eb1e | 91 | case SIOCGSTAMPNS: /* borrowed from IP */ |
8865c418 DW |
92 | #ifdef CONFIG_COMPAT |
93 | if (compat) | |
94 | error = compat_sock_get_timestampns(sk, argp); | |
95 | else | |
96 | #endif | |
97 | error = sock_get_timestampns(sk, argp); | |
ae40eb1e | 98 | goto done; |
1da177e4 | 99 | case ATM_SETSC: |
8865c418 DW |
100 | if (net_ratelimit()) |
101 | printk(KERN_WARNING "ATM_SETSC is obsolete; used by %s:%d\n", | |
102 | current->comm, task_pid_nr(current)); | |
1da177e4 LT |
103 | error = 0; |
104 | goto done; | |
105 | case ATMSIGD_CTRL: | |
106 | if (!capable(CAP_NET_ADMIN)) { | |
107 | error = -EPERM; | |
108 | goto done; | |
109 | } | |
110 | /* | |
111 | * The user/kernel protocol for exchanging signalling | |
112 | * info uses kernel pointers as opaque references, | |
113 | * so the holder of the file descriptor can scribble | |
114 | * on the kernel... so we should make sure that we | |
8865c418 | 115 | * have the same privileges that /proc/kcore needs |
1da177e4 LT |
116 | */ |
117 | if (!capable(CAP_SYS_RAWIO)) { | |
118 | error = -EPERM; | |
119 | goto done; | |
120 | } | |
8865c418 DW |
121 | #ifdef CONFIG_COMPAT |
122 | /* WTF? I don't even want to _think_ about making this | |
123 | work for 32-bit userspace. TBH I don't really want | |
124 | to think about it at all. dwmw2. */ | |
125 | if (compat) { | |
126 | if (net_ratelimit()) | |
127 | printk(KERN_WARNING "32-bit task cannot be atmsigd\n"); | |
128 | error = -EINVAL; | |
129 | goto done; | |
130 | } | |
131 | #endif | |
1da177e4 LT |
132 | error = sigd_attach(vcc); |
133 | if (!error) | |
134 | sock->state = SS_CONNECTED; | |
135 | goto done; | |
e2c4b721 RK |
136 | case ATM_SETBACKEND: |
137 | case ATM_NEWBACKENDIF: | |
138 | { | |
139 | atm_backend_t backend; | |
140 | error = get_user(backend, (atm_backend_t __user *) argp); | |
141 | if (error) | |
142 | goto done; | |
143 | switch (backend) { | |
144 | case ATM_BACKEND_PPP: | |
145 | request_module("pppoatm"); | |
146 | break; | |
147 | case ATM_BACKEND_BR2684: | |
148 | request_module("br2684"); | |
149 | break; | |
150 | } | |
151 | } | |
152 | break; | |
153 | case ATMMPC_CTRL: | |
154 | case ATMMPC_DATA: | |
155 | request_module("mpoa"); | |
156 | break; | |
157 | case ATMARPD_CTRL: | |
158 | request_module("clip"); | |
159 | break; | |
160 | case ATMLEC_CTRL: | |
161 | request_module("lec"); | |
1da177e4 LT |
162 | break; |
163 | } | |
164 | ||
1da177e4 LT |
165 | error = -ENOIOCTLCMD; |
166 | ||
4a3e2f71 | 167 | mutex_lock(&ioctl_mutex); |
1da177e4 LT |
168 | list_for_each(pos, &ioctl_list) { |
169 | struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list); | |
170 | if (try_module_get(ic->owner)) { | |
171 | error = ic->ioctl(sock, cmd, arg); | |
172 | module_put(ic->owner); | |
173 | if (error != -ENOIOCTLCMD) | |
174 | break; | |
175 | } | |
176 | } | |
4a3e2f71 | 177 | mutex_unlock(&ioctl_mutex); |
1da177e4 LT |
178 | |
179 | if (error != -ENOIOCTLCMD) | |
180 | goto done; | |
181 | ||
8865c418 | 182 | error = atm_dev_ioctl(cmd, argp, compat); |
1da177e4 LT |
183 | |
184 | done: | |
185 | return error; | |
186 | } | |
8865c418 DW |
187 | |
188 | ||
189 | int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
190 | { | |
191 | return do_vcc_ioctl(sock, cmd, arg, 0); | |
192 | } | |
193 | ||
194 | #ifdef CONFIG_COMPAT | |
195 | int vcc_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
196 | { | |
197 | return do_vcc_ioctl(sock, cmd, arg, 1); | |
198 | } | |
199 | #endif |