Commit | Line | Data |
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f58c4c0a AB |
1 | #include <linux/blkdev.h> |
2 | #include <linux/blkpg.h> | |
3 | #include <linux/blktrace_api.h> | |
4 | #include <linux/cdrom.h> | |
5 | #include <linux/compat.h> | |
6 | #include <linux/elevator.h> | |
7 | #include <linux/fd.h> | |
8 | #include <linux/hdreg.h> | |
9 | #include <linux/syscalls.h> | |
10 | #include <linux/smp_lock.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/uaccess.h> | |
13 | ||
14 | static int compat_put_ushort(unsigned long arg, unsigned short val) | |
15 | { | |
16 | return put_user(val, (unsigned short __user *)compat_ptr(arg)); | |
17 | } | |
18 | ||
19 | static int compat_put_int(unsigned long arg, int val) | |
20 | { | |
21 | return put_user(val, (compat_int_t __user *)compat_ptr(arg)); | |
22 | } | |
23 | ||
24 | static int compat_put_long(unsigned long arg, long val) | |
25 | { | |
26 | return put_user(val, (compat_long_t __user *)compat_ptr(arg)); | |
27 | } | |
28 | ||
29 | static int compat_put_ulong(unsigned long arg, compat_ulong_t val) | |
30 | { | |
31 | return put_user(val, (compat_ulong_t __user *)compat_ptr(arg)); | |
32 | } | |
33 | ||
34 | static int compat_put_u64(unsigned long arg, u64 val) | |
35 | { | |
36 | return put_user(val, (compat_u64 __user *)compat_ptr(arg)); | |
37 | } | |
38 | ||
39 | #define BLKBSZGET_32 _IOR(0x12, 112, int) | |
40 | #define BLKBSZSET_32 _IOW(0x12, 113, int) | |
41 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) | |
42 | ||
171044d4 AB |
43 | struct compat_blk_user_trace_setup { |
44 | char name[32]; | |
45 | u16 act_mask; | |
46 | u32 buf_size; | |
47 | u32 buf_nr; | |
48 | compat_u64 start_lba; | |
49 | compat_u64 end_lba; | |
50 | u32 pid; | |
51 | }; | |
52 | #define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup) | |
53 | ||
54 | static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg) | |
55 | { | |
56 | struct blk_user_trace_setup buts; | |
57 | struct compat_blk_user_trace_setup cbuts; | |
58 | struct request_queue *q; | |
59 | int ret; | |
60 | ||
61 | q = bdev_get_queue(bdev); | |
62 | if (!q) | |
63 | return -ENXIO; | |
64 | ||
65 | if (copy_from_user(&cbuts, arg, sizeof(cbuts))) | |
66 | return -EFAULT; | |
67 | ||
68 | buts = (struct blk_user_trace_setup) { | |
69 | .act_mask = cbuts.act_mask, | |
70 | .buf_size = cbuts.buf_size, | |
71 | .buf_nr = cbuts.buf_nr, | |
72 | .start_lba = cbuts.start_lba, | |
73 | .end_lba = cbuts.end_lba, | |
74 | .pid = cbuts.pid, | |
75 | }; | |
76 | memcpy(&buts.name, &cbuts.name, 32); | |
77 | ||
78 | mutex_lock(&bdev->bd_mutex); | |
79 | ret = do_blk_trace_setup(q, bdev, &buts); | |
80 | mutex_unlock(&bdev->bd_mutex); | |
81 | if (ret) | |
82 | return ret; | |
83 | ||
84 | if (copy_to_user(arg, &buts.name, 32)) | |
85 | return -EFAULT; | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
7199d4cd AB |
90 | static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file, |
91 | struct gendisk *disk, unsigned cmd, unsigned long arg) | |
92 | { | |
93 | int ret; | |
94 | ||
95 | switch (arg) { | |
96 | /* | |
97 | * No handler required for the ones below, we just need to | |
98 | * convert arg to a 64 bit pointer. | |
99 | */ | |
100 | case BLKSECTSET: | |
101 | /* | |
102 | * 0x03 -- HD/IDE ioctl's used by hdparm and friends. | |
103 | * Some need translations, these do not. | |
104 | */ | |
105 | case HDIO_GET_IDENTITY: | |
106 | case HDIO_DRIVE_TASK: | |
107 | case HDIO_DRIVE_CMD: | |
108 | case HDIO_SCAN_HWIF: | |
109 | /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */ | |
110 | case 0x330: | |
111 | /* 0x02 -- Floppy ioctls */ | |
112 | case FDMSGON: | |
113 | case FDMSGOFF: | |
114 | case FDSETEMSGTRESH: | |
115 | case FDFLUSH: | |
116 | case FDWERRORCLR: | |
117 | case FDSETMAXERRS: | |
118 | case FDGETMAXERRS: | |
119 | case FDGETDRVTYP: | |
120 | case FDEJECT: | |
121 | case FDCLRPRM: | |
122 | case FDFMTBEG: | |
123 | case FDFMTEND: | |
124 | case FDRESET: | |
125 | case FDTWADDLE: | |
126 | case FDFMTTRK: | |
127 | case FDRAWCMD: | |
128 | /* CDROM stuff */ | |
129 | case CDROMPAUSE: | |
130 | case CDROMRESUME: | |
131 | case CDROMPLAYMSF: | |
132 | case CDROMPLAYTRKIND: | |
133 | case CDROMREADTOCHDR: | |
134 | case CDROMREADTOCENTRY: | |
135 | case CDROMSTOP: | |
136 | case CDROMSTART: | |
137 | case CDROMEJECT: | |
138 | case CDROMVOLCTRL: | |
139 | case CDROMSUBCHNL: | |
140 | case CDROMMULTISESSION: | |
141 | case CDROM_GET_MCN: | |
142 | case CDROMRESET: | |
143 | case CDROMVOLREAD: | |
144 | case CDROMSEEK: | |
145 | case CDROMPLAYBLK: | |
146 | case CDROMCLOSETRAY: | |
147 | case CDROM_DISC_STATUS: | |
148 | case CDROM_CHANGER_NSLOTS: | |
149 | case CDROM_GET_CAPABILITY: | |
150 | /* Ignore cdrom.h about these next 5 ioctls, they absolutely do | |
151 | * not take a struct cdrom_read, instead they take a struct cdrom_msf | |
152 | * which is compatible. | |
153 | */ | |
154 | case CDROMREADMODE2: | |
155 | case CDROMREADMODE1: | |
156 | case CDROMREADRAW: | |
157 | case CDROMREADCOOKED: | |
158 | case CDROMREADALL: | |
159 | /* DVD ioctls */ | |
160 | case DVD_READ_STRUCT: | |
161 | case DVD_WRITE_STRUCT: | |
162 | case DVD_AUTH: | |
163 | arg = (unsigned long)compat_ptr(arg); | |
164 | /* These intepret arg as an unsigned long, not as a pointer, | |
165 | * so we must not do compat_ptr() conversion. */ | |
166 | case HDIO_SET_MULTCOUNT: | |
167 | case HDIO_SET_UNMASKINTR: | |
168 | case HDIO_SET_KEEPSETTINGS: | |
169 | case HDIO_SET_32BIT: | |
170 | case HDIO_SET_NOWERR: | |
171 | case HDIO_SET_DMA: | |
172 | case HDIO_SET_PIO_MODE: | |
173 | case HDIO_SET_NICE: | |
174 | case HDIO_SET_WCACHE: | |
175 | case HDIO_SET_ACOUSTIC: | |
176 | case HDIO_SET_BUSSTATE: | |
177 | case HDIO_SET_ADDRESS: | |
178 | case CDROMEJECT_SW: | |
179 | case CDROM_SET_OPTIONS: | |
180 | case CDROM_CLEAR_OPTIONS: | |
181 | case CDROM_SELECT_SPEED: | |
182 | case CDROM_SELECT_DISC: | |
183 | case CDROM_MEDIA_CHANGED: | |
184 | case CDROM_DRIVE_STATUS: | |
185 | case CDROM_LOCKDOOR: | |
186 | case CDROM_DEBUG: | |
187 | break; | |
188 | default: | |
189 | /* unknown ioctl number */ | |
190 | return -ENOIOCTLCMD; | |
191 | } | |
192 | ||
193 | if (disk->fops->unlocked_ioctl) | |
194 | return disk->fops->unlocked_ioctl(file, cmd, arg); | |
195 | ||
196 | if (disk->fops->ioctl) { | |
197 | lock_kernel(); | |
198 | ret = disk->fops->ioctl(inode, file, cmd, arg); | |
199 | unlock_kernel(); | |
200 | return ret; | |
201 | } | |
202 | ||
203 | return -ENOTTY; | |
204 | } | |
205 | ||
f58c4c0a AB |
206 | static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file, |
207 | struct block_device *bdev, | |
208 | unsigned cmd, unsigned long arg) | |
209 | { | |
210 | struct backing_dev_info *bdi; | |
211 | ||
212 | switch (cmd) { | |
213 | case BLKRAGET: | |
214 | case BLKFRAGET: | |
215 | if (!arg) | |
216 | return -EINVAL; | |
217 | bdi = blk_get_backing_dev_info(bdev); | |
218 | if (bdi == NULL) | |
219 | return -ENOTTY; | |
220 | return compat_put_long(arg, | |
221 | (bdi->ra_pages * PAGE_CACHE_SIZE) / 512); | |
222 | case BLKROGET: /* compatible */ | |
223 | return compat_put_int(arg, bdev_read_only(bdev) != 0); | |
224 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ | |
225 | return compat_put_int(arg, block_size(bdev)); | |
226 | case BLKSSZGET: /* get block device hardware sector size */ | |
227 | return compat_put_int(arg, bdev_hardsect_size(bdev)); | |
228 | case BLKSECTGET: | |
229 | return compat_put_ushort(arg, | |
230 | bdev_get_queue(bdev)->max_sectors); | |
231 | case BLKRASET: /* compatible, but no compat_ptr (!) */ | |
232 | case BLKFRASET: | |
233 | if (!capable(CAP_SYS_ADMIN)) | |
234 | return -EACCES; | |
235 | bdi = blk_get_backing_dev_info(bdev); | |
236 | if (bdi == NULL) | |
237 | return -ENOTTY; | |
238 | bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE; | |
239 | return 0; | |
240 | case BLKGETSIZE: | |
241 | if ((bdev->bd_inode->i_size >> 9) > ~0UL) | |
242 | return -EFBIG; | |
243 | return compat_put_ulong(arg, bdev->bd_inode->i_size >> 9); | |
244 | ||
245 | case BLKGETSIZE64_32: | |
246 | return compat_put_u64(arg, bdev->bd_inode->i_size); | |
171044d4 AB |
247 | |
248 | case BLKTRACESETUP32: | |
249 | return compat_blk_trace_setup(bdev, compat_ptr(arg)); | |
250 | case BLKTRACESTART: /* compatible */ | |
251 | case BLKTRACESTOP: /* compatible */ | |
252 | case BLKTRACETEARDOWN: /* compatible */ | |
253 | return blk_trace_ioctl(bdev, cmd, compat_ptr(arg)); | |
f58c4c0a AB |
254 | } |
255 | return -ENOIOCTLCMD; | |
256 | } | |
257 | ||
258 | /* Most of the generic ioctls are handled in the normal fallback path. | |
259 | This assumes the blkdev's low level compat_ioctl always returns | |
260 | ENOIOCTLCMD for unknown ioctls. */ | |
261 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
262 | { | |
263 | int ret = -ENOIOCTLCMD; | |
264 | struct inode *inode = file->f_mapping->host; | |
265 | struct block_device *bdev = inode->i_bdev; | |
266 | struct gendisk *disk = bdev->bd_disk; | |
267 | ||
268 | switch (cmd) { | |
269 | case BLKFLSBUF: | |
270 | case BLKROSET: | |
271 | /* | |
272 | * the ones below are implemented in blkdev_locked_ioctl, | |
273 | * but we call blkdev_ioctl, which gets the lock for us | |
274 | */ | |
275 | case BLKRRPART: | |
276 | return blkdev_ioctl(inode, file, cmd, | |
277 | (unsigned long)compat_ptr(arg)); | |
278 | case BLKBSZSET_32: | |
279 | return blkdev_ioctl(inode, file, BLKBSZSET, | |
280 | (unsigned long)compat_ptr(arg)); | |
281 | } | |
282 | ||
283 | lock_kernel(); | |
284 | ret = compat_blkdev_locked_ioctl(inode, file, bdev, cmd, arg); | |
285 | /* FIXME: why do we assume -> compat_ioctl needs the BKL? */ | |
286 | if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) | |
287 | ret = disk->fops->compat_ioctl(file, cmd, arg); | |
288 | unlock_kernel(); | |
289 | ||
7199d4cd AB |
290 | if (ret != -ENOIOCTLCMD) |
291 | return ret; | |
292 | ||
293 | return compat_blkdev_driver_ioctl(inode, file, disk, cmd, arg); | |
f58c4c0a | 294 | } |