aboutsummaryrefslogtreecommitdiffstats
path: root/fs/xfs/linux-2.6/xfs_ioctl32.c
blob: 83463c27545ce6958cd59d2b5069cdc5d43738d5 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/compat.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/syscalls.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_attr_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_vfs.h"
#include "xfs_vnode.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_dfrag.h"
#include "xfs_vnodeops.h"

#define  _NATIVE_IOC(cmd, type) \
	  _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))

#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
#define BROKEN_X86_ALIGNMENT
#define _PACKED __attribute__((packed))
/* on ia32 l_start is on a 32-bit boundary */
typedef struct xfs_flock64_32 {
	__s16		l_type;
	__s16		l_whence;
	__s64		l_start	__attribute__((packed));
			/* len == 0 means until end of file */
	__s64		l_len __attribute__((packed));
	__s32		l_sysid;
	__u32		l_pid;
	__s32		l_pad[4];	/* reserve area */
} xfs_flock64_32_t;

#define XFS_IOC_ALLOCSP_32	_IOW ('X', 10, struct xfs_flock64_32)
#define XFS_IOC_FREESP_32	_IOW ('X', 11, struct xfs_flock64_32)
#define XFS_IOC_ALLOCSP64_32	_IOW ('X', 36, struct xfs_flock64_32)
#define XFS_IOC_FREESP64_32	_IOW ('X', 37, struct xfs_flock64_32)
#define XFS_IOC_RESVSP_32	_IOW ('X', 40, struct xfs_flock64_32)
#define XFS_IOC_UNRESVSP_32	_IOW ('X', 41, struct xfs_flock64_32)
#define XFS_IOC_RESVSP64_32	_IOW ('X', 42, struct xfs_flock64_32)
#define XFS_IOC_UNRESVSP64_32	_IOW ('X', 43, struct xfs_flock64_32)

/* just account for different alignment */
STATIC unsigned long
xfs_ioctl32_flock(
	unsigned long		arg)
{
	xfs_flock64_32_t	__user *p32 = (void __user *)arg;
	xfs_flock64_t		__user *p = compat_alloc_user_space(sizeof(*p));

	if (copy_in_user(&p->l_type,	&p32->l_type,	sizeof(s16)) ||
	    copy_in_user(&p->l_whence,	&p32->l_whence, sizeof(s16)) ||
	    copy_in_user(&p->l_start,	&p32->l_start,	sizeof(s64)) ||
	    copy_in_user(&p->l_len,	&p32->l_len,	sizeof(s64)) ||
	    copy_in_user(&p->l_sysid,	&p32->l_sysid,	sizeof(s32)) ||
	    copy_in_user(&p->l_pid,	&p32->l_pid,	sizeof(u32)) ||
	    copy_in_user(&p->l_pad,	&p32->l_pad,	4*sizeof(u32)))
		return -EFAULT;

	return (unsigned long)p;
}

typedef struct compat_xfs_fsop_geom_v1 {
	__u32		blocksize;	/* filesystem (data) block size */
	__u32		rtextsize;	/* realtime extent size		*/
	__u32		agblocks;	/* fsblocks in an AG		*/
	__u32		agcount;	/* number of allocation groups	*/
	__u32		logblocks;	/* fsblocks in the log		*/
	__u32		sectsize;	/* (data) sector size, bytes	*/
	__u32		inodesize;	/* inode size in bytes		*/
	__u32		imaxpct;	/* max allowed inode space(%)	*/
	__u64		datablocks;	/* fsblocks in data subvolume	*/
	__u64		rtblocks;	/* fsblocks in realtime subvol	*/
	__u64		rtextents;	/* rt extents in realtime subvol*/
	__u64		logstart;	/* starting fsblock of the log	*/
	unsigned char	uuid[16];	/* unique id of the filesystem	*/
	__u32		sunit;		/* stripe unit, fsblocks	*/
	__u32		swidth;		/* stripe width, fsblocks	*/
	__s32		version;	/* structure version		*/
	__u32		flags;		/* superblock version flags	*/
	__u32		logsectsize;	/* log sector size, bytes	*/
	__u32		rtsectsize;	/* realtime sector size, bytes	*/
	__u32		dirblocksize;	/* directory block size, bytes	*/
} __attribute__((packed)) compat_xfs_fsop_geom_v1_t;

#define XFS_IOC_FSGEOMETRY_V1_32  \
	_IOR ('X', 100, struct compat_xfs_fsop_geom_v1)

STATIC unsigned long xfs_ioctl32_geom_v1(unsigned long arg)
{
	compat_xfs_fsop_geom_v1_t __user *p32 = (void __user *)arg;
	xfs_fsop_geom_v1_t __user *p = compat_alloc_user_space(sizeof(*p));

	if (copy_in_user(p, p32, sizeof(*p32)))
		return -EFAULT;
	return (unsigned long)p;
}

typedef struct compat_xfs_inogrp {
	__u64		xi_startino;	/* starting inode number	*/
	__s32		xi_alloccount;	/* # bits set in allocmask	*/
	__u64		xi_allocmask;	/* mask of allocated inodes	*/
} __attribute__((packed)) compat_xfs_inogrp_t;

STATIC int xfs_inumbers_fmt_compat(
	void __user *ubuffer,
	const xfs_inogrp_t *buffer,
	long count,
	long *written)
{
	compat_xfs_inogrp_t __user *p32 = ubuffer;
	long i;

	for (i = 0; i < count; i++) {
		if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
		    put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
		    put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
			return -EFAULT;
	}
	*written = count * sizeof(*p32);
	return 0;
}

#else

#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
#define _PACKED

#endif

/* XFS_IOC_FSBULKSTAT and friends */

typedef struct compat_xfs_bstime {
	__s32		tv_sec;		/* seconds		*/
	__s32		tv_nsec;	/* and nanoseconds	*/
} compat_xfs_bstime_t;

STATIC int xfs_bstime_store_compat(
	compat_xfs_bstime_t __user *p32,
	const xfs_bstime_t *p)
{
	__s32 sec32;

	sec32 = p->tv_sec;
	if (put_user(sec32, &p32->tv_sec) ||
	    put_user(p->tv_nsec, &p32->tv_nsec))
		return -EFAULT;
	return 0;
}

typedef struct compat_xfs_bstat {
	__u64		bs_ino;		/* inode number			*/
	__u16		bs_mode;	/* type and mode		*/
	__u16		bs_nlink;	/* number of links		*/
	__u32		bs_uid;		/* user id			*/
	__u32		bs_gid;		/* group id			*/
	__u32		bs_rdev;	/* device value			*/
	__s32		bs_blksize;	/* block size			*/
	__s64		bs_size;	/* file size			*/
	compat_xfs_bstime_t bs_atime;	/* access time			*/
	compat_xfs_bstime_t bs_mtime;	/* modify time			*/
	compat_xfs_bstime_t bs_ctime;	/* inode change time		*/
	int64_t		bs_blocks;	/* number of blocks		*/
	__u32		bs_xflags;	/* extended flags		*/
	__s32		bs_extsize;	/* extent size			*/
	__s32		bs_extents;	/* number of extents		*/
	__u32		bs_gen;		/* generation count		*/
	__u16		bs_projid;	/* project id			*/
	unsigned char	bs_pad[14];	/* pad space, unused		*/
	__u32		bs_dmevmask;	/* DMIG event mask		*/
	__u16		bs_dmstate;	/* DMIG state info		*/
	__u16		bs_aextents;	/* attribute number of extents	*/
} _PACKED compat_xfs_bstat_t;

STATIC int xfs_bulkstat_one_fmt_compat(
	void			__user *ubuffer,
	const xfs_bstat_t	*buffer)
{
	compat_xfs_bstat_t __user *p32 = ubuffer;

	if (put_user(buffer->bs_ino, &p32->bs_ino) ||
	    put_user(buffer->bs_mode, &p32->bs_mode) ||
	    put_user(buffer->bs_nlink, &p32->bs_nlink) ||
	    put_user(buffer->bs_uid, &p32->bs_uid) ||
	    put_user(buffer->bs_gid, &p32->bs_gid) ||
	    put_user(buffer->bs_rdev, &p32->bs_rdev) ||
	    put_user(buffer->bs_blksize, &p32->bs_blksize) ||
	    put_user(buffer->bs_size, &p32->bs_size) ||
	    xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
	    xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
	    xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
	    put_user(buffer->bs_blocks, &p32->bs_blocks) ||
	    put_user(buffer->bs_xflags, &p32->bs_xflags) ||
	    put_user(buffer->bs_extsize, &p32->bs_extsize) ||
	    put_user(buffer->bs_extents, &p32->bs_extents) ||
	    put_user(buffer->bs_gen, &p32->bs_gen) ||
	    put_user(buffer->bs_projid, &p32->bs_projid) ||
	    put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
	    put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
	    put_user(buffer->bs_aextents, &p32->bs_aextents))
		return -EFAULT;
	return sizeof(*p32);
}



typedef struct compat_xfs_fsop_bulkreq {
	compat_uptr_t	lastip;		/* last inode # pointer		*/
	__s32		icount;		/* count of entries in buffer	*/
	compat_uptr_t	ubuffer;	/* user buffer for inode desc.	*/
	compat_uptr_t	ocount;		/* output count pointer		*/
} compat_xfs_fsop_bulkreq_t;

#define XFS_IOC_FSBULKSTAT_32 \
	_IOWR('X', 101, struct compat_xfs_fsop_bulkreq)
#define XFS_IOC_FSBULKSTAT_SINGLE_32 \
	_IOWR('X', 102, struct compat_xfs_fsop_bulkreq)
#define XFS_IOC_FSINUMBERS_32 \
	_IOWR('X', 103, struct compat_xfs_fsop_bulkreq)

/* copied from xfs_ioctl.c */
STATIC int
xfs_ioc_bulkstat_compat(
	xfs_mount_t		*mp,
	unsigned int		cmd,
	void			__user *arg)
{
	compat_xfs_fsop_bulkreq_t __user *p32 = (void __user *)arg;
	u32			addr;
	xfs_fsop_bulkreq_t	bulkreq;
	int			count;	/* # of records returned */
	xfs_ino_t		inlast;	/* last inode number */
	int			done;
	int			error;

	/* done = 1 if there are more stats to get and if bulkstat */
	/* should be called again (unused here, but used in dmapi) */

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (XFS_FORCED_SHUTDOWN(mp))
		return -XFS_ERROR(EIO);

	if (get_user(addr, &p32->lastip))
		return -EFAULT;
	bulkreq.lastip = compat_ptr(addr);
	if (get_user(bulkreq.icount, &p32->icount) ||
	    get_user(addr, &p32->ubuffer))
		return -EFAULT;
	bulkreq.ubuffer = compat_ptr(addr);
	if (get_user(addr, &p32->ocount))
		return -EFAULT;
	bulkreq.ocount = compat_ptr(addr);

	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
		return -XFS_ERROR(EFAULT);

	if ((count = bulkreq.icount) <= 0)
		return -XFS_ERROR(EINVAL);

	if (bulkreq.ubuffer == NULL)
		return -XFS_ERROR(EINVAL);

	if (cmd == XFS_IOC_FSINUMBERS)
		error = xfs_inumbers(mp, &inlast, &count,
				bulkreq.ubuffer, xfs_inumbers_fmt_compat);
	else {
		/* declare a var to get a warning in case the type changes */
		bulkstat_one_fmt_pf formatter = xfs_bulkstat_one_fmt_compat;
		error = xfs_bulkstat(mp, &inlast, &count,
			xfs_bulkstat_one, formatter,
			sizeof(compat_xfs_bstat_t), bulkreq.ubuffer,
			BULKSTAT_FG_QUICK, &done);
	}
	if (error)
		return -error;

	if (bulkreq.ocount != NULL) {
		if (copy_to_user(bulkreq.lastip, &inlast,
						sizeof(xfs_ino_t)))
			return -XFS_ERROR(EFAULT);

		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
			return -XFS_ERROR(EFAULT);
	}

	return 0;
}



typedef struct compat_xfs_fsop_handlereq {
	__u32		fd;		/* fd for FD_TO_HANDLE		*/
	compat_uptr_t	path;		/* user pathname		*/
	__u32		oflags;		/* open flags			*/
	compat_uptr_t	ihandle;	/* user supplied handle		*/
	__u32		ihandlen;	/* user supplied length		*/
	compat_uptr_t	ohandle;	/* user buffer for handle	*/
	compat_uptr_t	ohandlen;	/* user buffer length		*/
} compat_xfs_fsop_handlereq_t;

#define XFS_IOC_PATH_TO_FSHANDLE_32 \
	_IOWR('X', 104, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_PATH_TO_HANDLE_32 \
	_IOWR('X', 105, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_FD_TO_HANDLE_32 \
	_IOWR('X', 106, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_OPEN_BY_HANDLE_32 \
	_IOWR('X', 107, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_READLINK_BY_HANDLE_32 \
	_IOWR('X', 108, struct compat_xfs_fsop_handlereq)

STATIC unsigned long xfs_ioctl32_fshandle(unsigned long arg)
{
	compat_xfs_fsop_handlereq_t __user *p32 = (void __user *)arg;
	xfs_fsop_handlereq_t __user *p = compat_alloc_user_space(sizeof(*p));
	u32 addr;

	if (copy_in_user(&p->fd, &p32->fd, sizeof(__u32)) ||
	    get_user(addr, &p32->path) ||
	    put_user(compat_ptr(addr), &p->path) ||
	    copy_in_user(&p->oflags, &p32->oflags, sizeof(__u32)) ||
	    get_user(addr, &p32->ihandle) ||
	    put_user(compat_ptr(addr), &p->ihandle) ||
	    copy_in_user(&p->ihandlen, &p32->ihandlen, sizeof(__u32)) ||
	    get_user(addr, &p32->ohandle) ||
	    put_user(compat_ptr(addr), &p->ohandle) ||
	    get_user(addr, &p32->ohandlen) ||
	    put_user(compat_ptr(addr), &p->ohandlen))
		return -EFAULT;

	return (unsigned long)p;
}


STATIC long
xfs_compat_ioctl(
	int		mode,
	struct file	*file,
	unsigned	cmd,
	unsigned long	arg)
{
	struct inode	*inode = file->f_path.dentry->d_inode;
	int		error;

	switch (cmd) {
	case XFS_IOC_DIOINFO:
	case XFS_IOC_FSGEOMETRY:
	case XFS_IOC_FSGETXATTR:
	case XFS_IOC_FSSETXATTR:
	case XFS_IOC_FSGETXATTRA:
	case XFS_IOC_FSSETDM:
	case XFS_IOC_GETBMAP:
	case XFS_IOC_GETBMAPA:
	case XFS_IOC_GETBMAPX:
/* not handled
	case XFS_IOC_FSSETDM_BY_HANDLE:
	case XFS_IOC_ATTRLIST_BY_HANDLE:
	case XFS_IOC_ATTRMULTI_BY_HANDLE:
*/
	case XFS_IOC_FSCOUNTS:
	case XFS_IOC_SET_RESBLKS:
	case XFS_IOC_GET_RESBLKS:
	case XFS_IOC_FSGROWFSDATA:
	case XFS_IOC_FSGROWFSLOG:
	case XFS_IOC_FSGROWFSRT:
	case XFS_IOC_FREEZE:
	case XFS_IOC_THAW:
	case XFS_IOC_GOINGDOWN:
	case XFS_IOC_ERROR_INJECTION:
	case XFS_IOC_ERROR_CLEARALL:
		break;

	case XFS_IOC32_GETXFLAGS:
	case XFS_IOC32_SETXFLAGS:
	case XFS_IOC32_GETVERSION:
		cmd = _NATIVE_IOC(cmd, long);
		break;
#ifdef BROKEN_X86_ALIGNMENT
	/* xfs_flock_t has wrong u32 vs u64 alignment */
	case XFS_IOC_ALLOCSP_32:
	case XFS_IOC_FREESP_32:
	case XFS_IOC_ALLOCSP64_32:
	case XFS_IOC_FREESP64_32:
	case XFS_IOC_RESVSP_32:
	case XFS_IOC_UNRESVSP_32:
	case XFS_IOC_RESVSP64_32:
	case XFS_IOC_UNRESVSP64_32:
		arg = xfs_ioctl32_flock(arg);
		cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
		break;
	case XFS_IOC_FSGEOMETRY_V1_32:
		arg = xfs_ioctl32_geom_v1(arg);
		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_geom_v1);
		break;

#else /* These are handled fine if no alignment issues */
	case XFS_IOC_ALLOCSP:
	case XFS_IOC_FREESP:
	case XFS_IOC_RESVSP:
	case XFS_IOC_UNRESVSP:
	case XFS_IOC_ALLOCSP64:
	case XFS_IOC_FREESP64:
	case XFS_IOC_RESVSP64:
	case XFS_IOC_UNRESVSP64:
	case XFS_IOC_FSGEOMETRY_V1:
		break;

	/* xfs_bstat_t still has wrong u32 vs u64 alignment */
	case XFS_IOC_SWAPEXT:
		break;

#endif
	case XFS_IOC_FSBULKSTAT_32:
	case XFS_IOC_FSBULKSTAT_SINGLE_32:
	case XFS_IOC_FSINUMBERS_32:
		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_bulkreq);
		return xfs_ioc_bulkstat_compat(XFS_I(inode)->i_mount,
				cmd, (void __user*)arg);
	case XFS_IOC_FD_TO_HANDLE_32:
	case XFS_IOC_PATH_TO_HANDLE_32:
	case XFS_IOC_PATH_TO_FSHANDLE_32:
	case XFS_IOC_OPEN_BY_HANDLE_32:
	case XFS_IOC_READLINK_BY_HANDLE_32:
		arg = xfs_ioctl32_fshandle(arg);
		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
		break;
	default:
		return -ENOIOCTLCMD;
	}

	error = xfs_ioctl(XFS_I(inode), file, mode, cmd, (void __user *)arg);
	xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);

	return error;
}

long
xfs_file_compat_ioctl(
	struct file		*file,
	unsigned		cmd,
	unsigned long		arg)
{
	return xfs_compat_ioctl(0, file, cmd, arg);
}

long
xfs_file_compat_invis_ioctl(
	struct file		*file,
	unsigned		cmd,
	unsigned long		arg)
{
	return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
}