File: /usr/src/linux/arch/mips/kernel/irixioctl.c
1 /*
2 * irixioctl.c: A fucking mess...
3 *
4 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/sched.h>
9 #include <linux/fs.h>
10 #include <linux/mm.h>
11 #include <linux/smp.h>
12 #include <linux/smp_lock.h>
13 #include <linux/tty.h>
14 #include <linux/file.h>
15
16 #include <asm/uaccess.h>
17 #include <asm/ioctl.h>
18 #include <asm/ioctls.h>
19
20 #undef DEBUG_IOCTLS
21 #undef DEBUG_MISSING_IOCTL
22
23 struct irix_termios {
24 tcflag_t c_iflag, c_oflag, c_cflag, c_lflag;
25 cc_t c_cc[NCCS];
26 };
27
28 extern asmlinkage int sys_ioctl(unsigned int fd, unsigned int cmd,
29 unsigned long arg);
30 extern asmlinkage int sys_write(unsigned int fd,char * buf,unsigned int count);
31 extern void start_tty(struct tty_struct *tty);
32 static struct tty_struct *get_tty(int fd)
33 {
34 struct file *filp;
35 struct tty_struct *ttyp = NULL;
36
37 read_lock(¤t->files->file_lock);
38 filp = fcheck(fd);
39 if(filp && filp->private_data) {
40 ttyp = (struct tty_struct *) filp->private_data;
41
42 if(ttyp->magic != TTY_MAGIC)
43 ttyp =NULL;
44 }
45 read_unlock(¤t->files->file_lock);
46 return ttyp;
47 }
48
49 static struct tty_struct *get_real_tty(struct tty_struct *tp)
50 {
51 if (tp->driver.type == TTY_DRIVER_TYPE_PTY &&
52 tp->driver.subtype == PTY_TYPE_MASTER)
53 return tp->link;
54 else
55 return tp;
56 }
57
58 asmlinkage int irix_ioctl(int fd, unsigned long cmd, unsigned long arg)
59 {
60 struct tty_struct *tp, *rtp;
61 mm_segment_t old_fs;
62 int error = 0;
63
64 #ifdef DEBUG_IOCTLS
65 printk("[%s:%d] irix_ioctl(%d, ", current->comm, current->pid, fd);
66 #endif
67 switch(cmd) {
68 case 0x00005401:
69 #ifdef DEBUG_IOCTLS
70 printk("TCGETA, %08lx) ", arg);
71 #endif
72 error = sys_ioctl(fd, TCGETA, arg);
73 break;
74
75 case 0x0000540d: {
76 struct termios kt;
77 struct irix_termios *it = (struct irix_termios *) arg;
78
79 #ifdef DEBUG_IOCTLS
80 printk("TCGETS, %08lx) ", arg);
81 #endif
82 if(!access_ok(VERIFY_WRITE, it, sizeof(*it))) {
83 error = -EFAULT;
84 break;
85 }
86 old_fs = get_fs(); set_fs(get_ds());
87 error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
88 set_fs(old_fs);
89 if (error)
90 break;
91 __put_user(kt.c_iflag, &it->c_iflag);
92 __put_user(kt.c_oflag, &it->c_oflag);
93 __put_user(kt.c_cflag, &it->c_cflag);
94 __put_user(kt.c_lflag, &it->c_lflag);
95 for(error = 0; error < NCCS; error++)
96 __put_user(kt.c_cc[error], &it->c_cc[error]);
97 error = 0;
98 break;
99 }
100
101 case 0x0000540e: {
102 struct termios kt;
103 struct irix_termios *it = (struct irix_termios *) arg;
104
105 #ifdef DEBUG_IOCTLS
106 printk("TCSETS, %08lx) ", arg);
107 #endif
108 if (!access_ok(VERIFY_READ, it, sizeof(*it))) {
109 error = -EFAULT;
110 break;
111 }
112 old_fs = get_fs(); set_fs(get_ds());
113 error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
114 set_fs(old_fs);
115 if(error)
116 break;
117 __get_user(kt.c_iflag, &it->c_iflag);
118 __get_user(kt.c_oflag, &it->c_oflag);
119 __get_user(kt.c_cflag, &it->c_cflag);
120 __get_user(kt.c_lflag, &it->c_lflag);
121 for(error = 0; error < NCCS; error++)
122 __get_user(kt.c_cc[error], &it->c_cc[error]);
123 old_fs = get_fs(); set_fs(get_ds());
124 error = sys_ioctl(fd, TCSETS, (unsigned long) &kt);
125 set_fs(old_fs);
126 break;
127 }
128
129 case 0x0000540f:
130 #ifdef DEBUG_IOCTLS
131 printk("TCSETSW, %08lx) ", arg);
132 #endif
133 error = sys_ioctl(fd, TCSETSW, arg);
134 break;
135
136 case 0x00005471:
137 #ifdef DEBUG_IOCTLS
138 printk("TIOCNOTTY, %08lx) ", arg);
139 #endif
140 error = sys_ioctl(fd, TIOCNOTTY, arg);
141 break;
142
143 case 0x00007416:
144 #ifdef DEBUG_IOCTLS
145 printk("TIOCGSID, %08lx) ", arg);
146 #endif
147 tp = get_tty(fd);
148 if(!tp) {
149 error = -EINVAL;
150 break;
151 }
152 rtp = get_real_tty(tp);
153 #ifdef DEBUG_IOCTLS
154 printk("rtp->session=%d ", rtp->session);
155 #endif
156 error = put_user(rtp->session, (unsigned long *) arg);
157 break;
158
159 case 0x746e:
160 /* TIOCSTART, same effect as hitting ^Q */
161 #ifdef DEBUG_IOCTLS
162 printk("TIOCSTART, %08lx) ", arg);
163 #endif
164 tp = get_tty(fd);
165 if(!tp) {
166 error = -EINVAL;
167 break;
168 }
169 rtp = get_real_tty(tp);
170 start_tty(rtp);
171 break;
172
173 case 0x20006968:
174 #ifdef DEBUG_IOCTLS
175 printk("SIOCGETLABEL, %08lx) ", arg);
176 #endif
177 error = -ENOPKG;
178 break;
179
180 case 0x40047477:
181 #ifdef DEBUG_IOCTLS
182 printk("TIOCGPGRP, %08lx) ", arg);
183 #endif
184 error = sys_ioctl(fd, TIOCGPGRP, arg);
185 #ifdef DEBUG_IOCTLS
186 printk("arg=%d ", *(int *)arg);
187 #endif
188 break;
189
190 case 0x40087468:
191 #ifdef DEBUG_IOCTLS
192 printk("TIOCGWINSZ, %08lx) ", arg);
193 #endif
194 error = sys_ioctl(fd, TIOCGWINSZ, arg);
195 break;
196
197 case 0x8004667e:
198 #ifdef DEBUG_IOCTLS
199 printk("FIONBIO, %08lx) arg=%d ", arg, *(int *)arg);
200 #endif
201 error = sys_ioctl(fd, FIONBIO, arg);
202 break;
203
204 case 0x80047476:
205 #ifdef DEBUG_IOCTLS
206 printk("TIOCSPGRP, %08lx) arg=%d ", arg, *(int *)arg);
207 #endif
208 error = sys_ioctl(fd, TIOCSPGRP, arg);
209 break;
210
211 case 0x8020690c:
212 #ifdef DEBUG_IOCTLS
213 printk("SIOCSIFADDR, %08lx) arg=%d ", arg, *(int *)arg);
214 #endif
215 error = sys_ioctl(fd, SIOCSIFADDR, arg);
216 break;
217
218 case 0x80206910:
219 #ifdef DEBUG_IOCTLS
220 printk("SIOCSIFFLAGS, %08lx) arg=%d ", arg, *(int *)arg);
221 #endif
222 error = sys_ioctl(fd, SIOCSIFFLAGS, arg);
223 break;
224
225 case 0xc0206911:
226 #ifdef DEBUG_IOCTLS
227 printk("SIOCGIFFLAGS, %08lx) arg=%d ", arg, *(int *)arg);
228 #endif
229 error = sys_ioctl(fd, SIOCGIFFLAGS, arg);
230 break;
231
232 case 0xc020691b:
233 #ifdef DEBUG_IOCTLS
234 printk("SIOCGIFMETRIC, %08lx) arg=%d ", arg, *(int *)arg);
235 #endif
236 error = sys_ioctl(fd, SIOCGIFMETRIC, arg);
237 break;
238
239 default: {
240 #ifdef DEBUG_MISSING_IOCTL
241 char *msg = "Unimplemented IOCTL cmd tell linux@engr.sgi.com\n";
242
243 #ifdef DEBUG_IOCTLS
244 printk("UNIMP_IOCTL, %08lx)\n", arg);
245 #endif
246 old_fs = get_fs(); set_fs(get_ds());
247 sys_write(2, msg, strlen(msg));
248 set_fs(old_fs);
249 printk("[%s:%d] Does unimplemented IRIX ioctl cmd %08lx\n",
250 current->comm, current->pid, cmd);
251 do_exit(255);
252 #else
253 error = sys_ioctl (fd, cmd, arg);
254 #endif
255 }
256
257 };
258 #ifdef DEBUG_IOCTLS
259 printk("error=%d\n", error);
260 #endif
261 return error;
262 }
263