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1/*
2 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include <linux/compat.h>
19#include <linux/ioctl.h>
20#include <linux/mount.h>
21#include <linux/slab.h>
22#include <linux/uaccess.h>
23#include <linux/fsmap.h>
24#include "xfs.h"
25#include "xfs_fs.h"
26#include "xfs_format.h"
27#include "xfs_log_format.h"
28#include "xfs_trans_resv.h"
29#include "xfs_mount.h"
30#include "xfs_inode.h"
31#include "xfs_itable.h"
32#include "xfs_error.h"
33#include "xfs_fsops.h"
34#include "xfs_alloc.h"
35#include "xfs_rtalloc.h"
36#include "xfs_attr.h"
37#include "xfs_ioctl.h"
38#include "xfs_ioctl32.h"
39#include "xfs_trace.h"
40#include "xfs_sb.h"
41
42#define _NATIVE_IOC(cmd, type) \
43 _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
44
45#ifdef BROKEN_X86_ALIGNMENT
46STATIC int
47xfs_compat_flock64_copyin(
48 xfs_flock64_t *bf,
49 compat_xfs_flock64_t __user *arg32)
50{
51 if (get_user(bf->l_type, &arg32->l_type) ||
52 get_user(bf->l_whence, &arg32->l_whence) ||
53 get_user(bf->l_start, &arg32->l_start) ||
54 get_user(bf->l_len, &arg32->l_len) ||
55 get_user(bf->l_sysid, &arg32->l_sysid) ||
56 get_user(bf->l_pid, &arg32->l_pid) ||
57 copy_from_user(bf->l_pad, &arg32->l_pad, 4*sizeof(u32)))
58 return -EFAULT;
59 return 0;
60}
61
62STATIC int
63xfs_compat_ioc_fsgeometry_v1(
64 struct xfs_mount *mp,
65 compat_xfs_fsop_geom_v1_t __user *arg32)
66{
67 xfs_fsop_geom_t fsgeo;
68 int error;
69
70 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
71 if (error)
72 return error;
73 /* The 32-bit variant simply has some padding at the end */
74 if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
75 return -EFAULT;
76 return 0;
77}
78
79STATIC int
80xfs_compat_growfs_data_copyin(
81 struct xfs_growfs_data *in,
82 compat_xfs_growfs_data_t __user *arg32)
83{
84 if (get_user(in->newblocks, &arg32->newblocks) ||
85 get_user(in->imaxpct, &arg32->imaxpct))
86 return -EFAULT;
87 return 0;
88}
89
90STATIC int
91xfs_compat_growfs_rt_copyin(
92 struct xfs_growfs_rt *in,
93 compat_xfs_growfs_rt_t __user *arg32)
94{
95 if (get_user(in->newblocks, &arg32->newblocks) ||
96 get_user(in->extsize, &arg32->extsize))
97 return -EFAULT;
98 return 0;
99}
100
101STATIC int
102xfs_inumbers_fmt_compat(
103 void __user *ubuffer,
104 const struct xfs_inogrp *buffer,
105 long count,
106 long *written)
107{
108 compat_xfs_inogrp_t __user *p32 = ubuffer;
109 long i;
110
111 for (i = 0; i < count; i++) {
112 if (put_user(buffer[i].xi_startino, &p32[i].xi_startino) ||
113 put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
114 put_user(buffer[i].xi_allocmask, &p32[i].xi_allocmask))
115 return -EFAULT;
116 }
117 *written = count * sizeof(*p32);
118 return 0;
119}
120
121#else
122#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
123#endif /* BROKEN_X86_ALIGNMENT */
124
125STATIC int
126xfs_ioctl32_bstime_copyin(
127 xfs_bstime_t *bstime,
128 compat_xfs_bstime_t __user *bstime32)
129{
130 compat_time_t sec32; /* tv_sec differs on 64 vs. 32 */
131
132 if (get_user(sec32, &bstime32->tv_sec) ||
133 get_user(bstime->tv_nsec, &bstime32->tv_nsec))
134 return -EFAULT;
135 bstime->tv_sec = sec32;
136 return 0;
137}
138
139/* xfs_bstat_t has differing alignment on intel, & bstime_t sizes everywhere */
140STATIC int
141xfs_ioctl32_bstat_copyin(
142 xfs_bstat_t *bstat,
143 compat_xfs_bstat_t __user *bstat32)
144{
145 if (get_user(bstat->bs_ino, &bstat32->bs_ino) ||
146 get_user(bstat->bs_mode, &bstat32->bs_mode) ||
147 get_user(bstat->bs_nlink, &bstat32->bs_nlink) ||
148 get_user(bstat->bs_uid, &bstat32->bs_uid) ||
149 get_user(bstat->bs_gid, &bstat32->bs_gid) ||
150 get_user(bstat->bs_rdev, &bstat32->bs_rdev) ||
151 get_user(bstat->bs_blksize, &bstat32->bs_blksize) ||
152 get_user(bstat->bs_size, &bstat32->bs_size) ||
153 xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) ||
154 xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) ||
155 xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) ||
156 get_user(bstat->bs_blocks, &bstat32->bs_size) ||
157 get_user(bstat->bs_xflags, &bstat32->bs_size) ||
158 get_user(bstat->bs_extsize, &bstat32->bs_extsize) ||
159 get_user(bstat->bs_extents, &bstat32->bs_extents) ||
160 get_user(bstat->bs_gen, &bstat32->bs_gen) ||
161 get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) ||
162 get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) ||
163 get_user(bstat->bs_forkoff, &bstat32->bs_forkoff) ||
164 get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) ||
165 get_user(bstat->bs_dmstate, &bstat32->bs_dmstate) ||
166 get_user(bstat->bs_aextents, &bstat32->bs_aextents))
167 return -EFAULT;
168 return 0;
169}
170
171/* XFS_IOC_FSBULKSTAT and friends */
172
173STATIC int
174xfs_bstime_store_compat(
175 compat_xfs_bstime_t __user *p32,
176 const xfs_bstime_t *p)
177{
178 __s32 sec32;
179
180 sec32 = p->tv_sec;
181 if (put_user(sec32, &p32->tv_sec) ||
182 put_user(p->tv_nsec, &p32->tv_nsec))
183 return -EFAULT;
184 return 0;
185}
186
187/* Return 0 on success or positive error (to xfs_bulkstat()) */
188STATIC int
189xfs_bulkstat_one_fmt_compat(
190 void __user *ubuffer,
191 int ubsize,
192 int *ubused,
193 const xfs_bstat_t *buffer)
194{
195 compat_xfs_bstat_t __user *p32 = ubuffer;
196
197 if (ubsize < sizeof(*p32))
198 return -ENOMEM;
199
200 if (put_user(buffer->bs_ino, &p32->bs_ino) ||
201 put_user(buffer->bs_mode, &p32->bs_mode) ||
202 put_user(buffer->bs_nlink, &p32->bs_nlink) ||
203 put_user(buffer->bs_uid, &p32->bs_uid) ||
204 put_user(buffer->bs_gid, &p32->bs_gid) ||
205 put_user(buffer->bs_rdev, &p32->bs_rdev) ||
206 put_user(buffer->bs_blksize, &p32->bs_blksize) ||
207 put_user(buffer->bs_size, &p32->bs_size) ||
208 xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
209 xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
210 xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
211 put_user(buffer->bs_blocks, &p32->bs_blocks) ||
212 put_user(buffer->bs_xflags, &p32->bs_xflags) ||
213 put_user(buffer->bs_extsize, &p32->bs_extsize) ||
214 put_user(buffer->bs_extents, &p32->bs_extents) ||
215 put_user(buffer->bs_gen, &p32->bs_gen) ||
216 put_user(buffer->bs_projid, &p32->bs_projid) ||
217 put_user(buffer->bs_projid_hi, &p32->bs_projid_hi) ||
218 put_user(buffer->bs_forkoff, &p32->bs_forkoff) ||
219 put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
220 put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
221 put_user(buffer->bs_aextents, &p32->bs_aextents))
222 return -EFAULT;
223 if (ubused)
224 *ubused = sizeof(*p32);
225 return 0;
226}
227
228STATIC int
229xfs_bulkstat_one_compat(
230 xfs_mount_t *mp, /* mount point for filesystem */
231 xfs_ino_t ino, /* inode number to get data for */
232 void __user *buffer, /* buffer to place output in */
233 int ubsize, /* size of buffer */
234 int *ubused, /* bytes used by me */
235 int *stat) /* BULKSTAT_RV_... */
236{
237 return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
238 xfs_bulkstat_one_fmt_compat,
239 ubused, stat);
240}
241
242/* copied from xfs_ioctl.c */
243STATIC int
244xfs_compat_ioc_bulkstat(
245 xfs_mount_t *mp,
246 unsigned int cmd,
247 compat_xfs_fsop_bulkreq_t __user *p32)
248{
249 u32 addr;
250 xfs_fsop_bulkreq_t bulkreq;
251 int count; /* # of records returned */
252 xfs_ino_t inlast; /* last inode number */
253 int done;
254 int error;
255
256 /* done = 1 if there are more stats to get and if bulkstat */
257 /* should be called again (unused here, but used in dmapi) */
258
259 if (!capable(CAP_SYS_ADMIN))
260 return -EPERM;
261
262 if (XFS_FORCED_SHUTDOWN(mp))
263 return -EIO;
264
265 if (get_user(addr, &p32->lastip))
266 return -EFAULT;
267 bulkreq.lastip = compat_ptr(addr);
268 if (get_user(bulkreq.icount, &p32->icount) ||
269 get_user(addr, &p32->ubuffer))
270 return -EFAULT;
271 bulkreq.ubuffer = compat_ptr(addr);
272 if (get_user(addr, &p32->ocount))
273 return -EFAULT;
274 bulkreq.ocount = compat_ptr(addr);
275
276 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
277 return -EFAULT;
278
279 if ((count = bulkreq.icount) <= 0)
280 return -EINVAL;
281
282 if (bulkreq.ubuffer == NULL)
283 return -EINVAL;
284
285 if (cmd == XFS_IOC_FSINUMBERS_32) {
286 error = xfs_inumbers(mp, &inlast, &count,
287 bulkreq.ubuffer, xfs_inumbers_fmt_compat);
288 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
289 int res;
290
291 error = xfs_bulkstat_one_compat(mp, inlast, bulkreq.ubuffer,
292 sizeof(compat_xfs_bstat_t), NULL, &res);
293 } else if (cmd == XFS_IOC_FSBULKSTAT_32) {
294 error = xfs_bulkstat(mp, &inlast, &count,
295 xfs_bulkstat_one_compat, sizeof(compat_xfs_bstat_t),
296 bulkreq.ubuffer, &done);
297 } else
298 error = -EINVAL;
299 if (error)
300 return error;
301
302 if (bulkreq.ocount != NULL) {
303 if (copy_to_user(bulkreq.lastip, &inlast,
304 sizeof(xfs_ino_t)))
305 return -EFAULT;
306
307 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
308 return -EFAULT;
309 }
310
311 return 0;
312}
313
314STATIC int
315xfs_compat_handlereq_copyin(
316 xfs_fsop_handlereq_t *hreq,
317 compat_xfs_fsop_handlereq_t __user *arg32)
318{
319 compat_xfs_fsop_handlereq_t hreq32;
320
321 if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
322 return -EFAULT;
323
324 hreq->fd = hreq32.fd;
325 hreq->path = compat_ptr(hreq32.path);
326 hreq->oflags = hreq32.oflags;
327 hreq->ihandle = compat_ptr(hreq32.ihandle);
328 hreq->ihandlen = hreq32.ihandlen;
329 hreq->ohandle = compat_ptr(hreq32.ohandle);
330 hreq->ohandlen = compat_ptr(hreq32.ohandlen);
331
332 return 0;
333}
334
335STATIC struct dentry *
336xfs_compat_handlereq_to_dentry(
337 struct file *parfilp,
338 compat_xfs_fsop_handlereq_t *hreq)
339{
340 return xfs_handle_to_dentry(parfilp,
341 compat_ptr(hreq->ihandle), hreq->ihandlen);
342}
343
344STATIC int
345xfs_compat_attrlist_by_handle(
346 struct file *parfilp,
347 void __user *arg)
348{
349 int error;
350 attrlist_cursor_kern_t *cursor;
351 compat_xfs_fsop_attrlist_handlereq_t al_hreq;
352 struct dentry *dentry;
353 char *kbuf;
354
355 if (!capable(CAP_SYS_ADMIN))
356 return -EPERM;
357 if (copy_from_user(&al_hreq, arg,
358 sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
359 return -EFAULT;
360 if (al_hreq.buflen < sizeof(struct attrlist) ||
361 al_hreq.buflen > XFS_XATTR_LIST_MAX)
362 return -EINVAL;
363
364 /*
365 * Reject flags, only allow namespaces.
366 */
367 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
368 return -EINVAL;
369
370 dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
371 if (IS_ERR(dentry))
372 return PTR_ERR(dentry);
373
374 error = -ENOMEM;
375 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
376 if (!kbuf)
377 goto out_dput;
378
379 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
380 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
381 al_hreq.flags, cursor);
382 if (error)
383 goto out_kfree;
384
385 if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
386 error = -EFAULT;
387
388out_kfree:
389 kmem_free(kbuf);
390out_dput:
391 dput(dentry);
392 return error;
393}
394
395STATIC int
396xfs_compat_attrmulti_by_handle(
397 struct file *parfilp,
398 void __user *arg)
399{
400 int error;
401 compat_xfs_attr_multiop_t *ops;
402 compat_xfs_fsop_attrmulti_handlereq_t am_hreq;
403 struct dentry *dentry;
404 unsigned int i, size;
405 unsigned char *attr_name;
406
407 if (!capable(CAP_SYS_ADMIN))
408 return -EPERM;
409 if (copy_from_user(&am_hreq, arg,
410 sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
411 return -EFAULT;
412
413 /* overflow check */
414 if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
415 return -E2BIG;
416
417 dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
418 if (IS_ERR(dentry))
419 return PTR_ERR(dentry);
420
421 error = -E2BIG;
422 size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
423 if (!size || size > 16 * PAGE_SIZE)
424 goto out_dput;
425
426 ops = memdup_user(compat_ptr(am_hreq.ops), size);
427 if (IS_ERR(ops)) {
428 error = PTR_ERR(ops);
429 goto out_dput;
430 }
431
432 error = -ENOMEM;
433 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
434 if (!attr_name)
435 goto out_kfree_ops;
436
437 error = 0;
438 for (i = 0; i < am_hreq.opcount; i++) {
439 ops[i].am_error = strncpy_from_user((char *)attr_name,
440 compat_ptr(ops[i].am_attrname),
441 MAXNAMELEN);
442 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
443 error = -ERANGE;
444 if (ops[i].am_error < 0)
445 break;
446
447 switch (ops[i].am_opcode) {
448 case ATTR_OP_GET:
449 ops[i].am_error = xfs_attrmulti_attr_get(
450 d_inode(dentry), attr_name,
451 compat_ptr(ops[i].am_attrvalue),
452 &ops[i].am_length, ops[i].am_flags);
453 break;
454 case ATTR_OP_SET:
455 ops[i].am_error = mnt_want_write_file(parfilp);
456 if (ops[i].am_error)
457 break;
458 ops[i].am_error = xfs_attrmulti_attr_set(
459 d_inode(dentry), attr_name,
460 compat_ptr(ops[i].am_attrvalue),
461 ops[i].am_length, ops[i].am_flags);
462 mnt_drop_write_file(parfilp);
463 break;
464 case ATTR_OP_REMOVE:
465 ops[i].am_error = mnt_want_write_file(parfilp);
466 if (ops[i].am_error)
467 break;
468 ops[i].am_error = xfs_attrmulti_attr_remove(
469 d_inode(dentry), attr_name,
470 ops[i].am_flags);
471 mnt_drop_write_file(parfilp);
472 break;
473 default:
474 ops[i].am_error = -EINVAL;
475 }
476 }
477
478 if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
479 error = -EFAULT;
480
481 kfree(attr_name);
482 out_kfree_ops:
483 kfree(ops);
484 out_dput:
485 dput(dentry);
486 return error;
487}
488
489STATIC int
490xfs_compat_fssetdm_by_handle(
491 struct file *parfilp,
492 void __user *arg)
493{
494 int error;
495 struct fsdmidata fsd;
496 compat_xfs_fsop_setdm_handlereq_t dmhreq;
497 struct dentry *dentry;
498
499 if (!capable(CAP_MKNOD))
500 return -EPERM;
501 if (copy_from_user(&dmhreq, arg,
502 sizeof(compat_xfs_fsop_setdm_handlereq_t)))
503 return -EFAULT;
504
505 dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
506 if (IS_ERR(dentry))
507 return PTR_ERR(dentry);
508
509 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
510 error = -EPERM;
511 goto out;
512 }
513
514 if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
515 error = -EFAULT;
516 goto out;
517 }
518
519 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
520 fsd.fsd_dmstate);
521
522out:
523 dput(dentry);
524 return error;
525}
526
527long
528xfs_file_compat_ioctl(
529 struct file *filp,
530 unsigned cmd,
531 unsigned long p)
532{
533 struct inode *inode = file_inode(filp);
534 struct xfs_inode *ip = XFS_I(inode);
535 struct xfs_mount *mp = ip->i_mount;
536 void __user *arg = (void __user *)p;
537 int error;
538
539 trace_xfs_file_compat_ioctl(ip);
540
541 switch (cmd) {
542 /* No size or alignment issues on any arch */
543 case XFS_IOC_DIOINFO:
544 case XFS_IOC_FSGEOMETRY:
545 case XFS_IOC_FSGETXATTR:
546 case XFS_IOC_FSSETXATTR:
547 case XFS_IOC_FSGETXATTRA:
548 case XFS_IOC_FSSETDM:
549 case XFS_IOC_GETBMAP:
550 case XFS_IOC_GETBMAPA:
551 case XFS_IOC_GETBMAPX:
552 case XFS_IOC_FSCOUNTS:
553 case XFS_IOC_SET_RESBLKS:
554 case XFS_IOC_GET_RESBLKS:
555 case XFS_IOC_FSGROWFSLOG:
556 case XFS_IOC_GOINGDOWN:
557 case XFS_IOC_ERROR_INJECTION:
558 case XFS_IOC_ERROR_CLEARALL:
559 case FS_IOC_GETFSMAP:
560 case XFS_IOC_SCRUB_METADATA:
561 return xfs_file_ioctl(filp, cmd, p);
562#ifndef BROKEN_X86_ALIGNMENT
563 /* These are handled fine if no alignment issues */
564 case XFS_IOC_ALLOCSP:
565 case XFS_IOC_FREESP:
566 case XFS_IOC_RESVSP:
567 case XFS_IOC_UNRESVSP:
568 case XFS_IOC_ALLOCSP64:
569 case XFS_IOC_FREESP64:
570 case XFS_IOC_RESVSP64:
571 case XFS_IOC_UNRESVSP64:
572 case XFS_IOC_FSGEOMETRY_V1:
573 case XFS_IOC_FSGROWFSDATA:
574 case XFS_IOC_FSGROWFSRT:
575 case XFS_IOC_ZERO_RANGE:
576 return xfs_file_ioctl(filp, cmd, p);
577#else
578 case XFS_IOC_ALLOCSP_32:
579 case XFS_IOC_FREESP_32:
580 case XFS_IOC_ALLOCSP64_32:
581 case XFS_IOC_FREESP64_32:
582 case XFS_IOC_RESVSP_32:
583 case XFS_IOC_UNRESVSP_32:
584 case XFS_IOC_RESVSP64_32:
585 case XFS_IOC_UNRESVSP64_32:
586 case XFS_IOC_ZERO_RANGE_32: {
587 struct xfs_flock64 bf;
588
589 if (xfs_compat_flock64_copyin(&bf, arg))
590 return -EFAULT;
591 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
592 return xfs_ioc_space(filp, cmd, &bf);
593 }
594 case XFS_IOC_FSGEOMETRY_V1_32:
595 return xfs_compat_ioc_fsgeometry_v1(mp, arg);
596 case XFS_IOC_FSGROWFSDATA_32: {
597 struct xfs_growfs_data in;
598
599 if (xfs_compat_growfs_data_copyin(&in, arg))
600 return -EFAULT;
601 error = mnt_want_write_file(filp);
602 if (error)
603 return error;
604 error = xfs_growfs_data(mp, &in);
605 mnt_drop_write_file(filp);
606 return error;
607 }
608 case XFS_IOC_FSGROWFSRT_32: {
609 struct xfs_growfs_rt in;
610
611 if (xfs_compat_growfs_rt_copyin(&in, arg))
612 return -EFAULT;
613 error = mnt_want_write_file(filp);
614 if (error)
615 return error;
616 error = xfs_growfs_rt(mp, &in);
617 mnt_drop_write_file(filp);
618 return error;
619 }
620#endif
621 /* long changes size, but xfs only copiese out 32 bits */
622 case XFS_IOC_GETXFLAGS_32:
623 case XFS_IOC_SETXFLAGS_32:
624 case XFS_IOC_GETVERSION_32:
625 cmd = _NATIVE_IOC(cmd, long);
626 return xfs_file_ioctl(filp, cmd, p);
627 case XFS_IOC_SWAPEXT_32: {
628 struct xfs_swapext sxp;
629 struct compat_xfs_swapext __user *sxu = arg;
630
631 /* Bulk copy in up to the sx_stat field, then copy bstat */
632 if (copy_from_user(&sxp, sxu,
633 offsetof(struct xfs_swapext, sx_stat)) ||
634 xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
635 return -EFAULT;
636 error = mnt_want_write_file(filp);
637 if (error)
638 return error;
639 error = xfs_ioc_swapext(&sxp);
640 mnt_drop_write_file(filp);
641 return error;
642 }
643 case XFS_IOC_FSBULKSTAT_32:
644 case XFS_IOC_FSBULKSTAT_SINGLE_32:
645 case XFS_IOC_FSINUMBERS_32:
646 return xfs_compat_ioc_bulkstat(mp, cmd, arg);
647 case XFS_IOC_FD_TO_HANDLE_32:
648 case XFS_IOC_PATH_TO_HANDLE_32:
649 case XFS_IOC_PATH_TO_FSHANDLE_32: {
650 struct xfs_fsop_handlereq hreq;
651
652 if (xfs_compat_handlereq_copyin(&hreq, arg))
653 return -EFAULT;
654 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
655 return xfs_find_handle(cmd, &hreq);
656 }
657 case XFS_IOC_OPEN_BY_HANDLE_32: {
658 struct xfs_fsop_handlereq hreq;
659
660 if (xfs_compat_handlereq_copyin(&hreq, arg))
661 return -EFAULT;
662 return xfs_open_by_handle(filp, &hreq);
663 }
664 case XFS_IOC_READLINK_BY_HANDLE_32: {
665 struct xfs_fsop_handlereq hreq;
666
667 if (xfs_compat_handlereq_copyin(&hreq, arg))
668 return -EFAULT;
669 return xfs_readlink_by_handle(filp, &hreq);
670 }
671 case XFS_IOC_ATTRLIST_BY_HANDLE_32:
672 return xfs_compat_attrlist_by_handle(filp, arg);
673 case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
674 return xfs_compat_attrmulti_by_handle(filp, arg);
675 case XFS_IOC_FSSETDM_BY_HANDLE_32:
676 return xfs_compat_fssetdm_by_handle(filp, arg);
677 default:
678 return -ENOIOCTLCMD;
679 }
680}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include <linux/mount.h>
7#include <linux/fsmap.h>
8#include "xfs.h"
9#include "xfs_fs.h"
10#include "xfs_shared.h"
11#include "xfs_format.h"
12#include "xfs_log_format.h"
13#include "xfs_trans_resv.h"
14#include "xfs_mount.h"
15#include "xfs_inode.h"
16#include "xfs_iwalk.h"
17#include "xfs_itable.h"
18#include "xfs_fsops.h"
19#include "xfs_rtalloc.h"
20#include "xfs_attr.h"
21#include "xfs_ioctl.h"
22#include "xfs_ioctl32.h"
23#include "xfs_trace.h"
24#include "xfs_sb.h"
25
26#define _NATIVE_IOC(cmd, type) \
27 _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
28
29#ifdef BROKEN_X86_ALIGNMENT
30STATIC int
31xfs_compat_flock64_copyin(
32 xfs_flock64_t *bf,
33 compat_xfs_flock64_t __user *arg32)
34{
35 if (get_user(bf->l_type, &arg32->l_type) ||
36 get_user(bf->l_whence, &arg32->l_whence) ||
37 get_user(bf->l_start, &arg32->l_start) ||
38 get_user(bf->l_len, &arg32->l_len) ||
39 get_user(bf->l_sysid, &arg32->l_sysid) ||
40 get_user(bf->l_pid, &arg32->l_pid) ||
41 copy_from_user(bf->l_pad, &arg32->l_pad, 4*sizeof(u32)))
42 return -EFAULT;
43 return 0;
44}
45
46STATIC int
47xfs_compat_ioc_fsgeometry_v1(
48 struct xfs_mount *mp,
49 compat_xfs_fsop_geom_v1_t __user *arg32)
50{
51 struct xfs_fsop_geom fsgeo;
52
53 xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
54 /* The 32-bit variant simply has some padding at the end */
55 if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
56 return -EFAULT;
57 return 0;
58}
59
60STATIC int
61xfs_compat_growfs_data_copyin(
62 struct xfs_growfs_data *in,
63 compat_xfs_growfs_data_t __user *arg32)
64{
65 if (get_user(in->newblocks, &arg32->newblocks) ||
66 get_user(in->imaxpct, &arg32->imaxpct))
67 return -EFAULT;
68 return 0;
69}
70
71STATIC int
72xfs_compat_growfs_rt_copyin(
73 struct xfs_growfs_rt *in,
74 compat_xfs_growfs_rt_t __user *arg32)
75{
76 if (get_user(in->newblocks, &arg32->newblocks) ||
77 get_user(in->extsize, &arg32->extsize))
78 return -EFAULT;
79 return 0;
80}
81
82STATIC int
83xfs_fsinumbers_fmt_compat(
84 struct xfs_ibulk *breq,
85 const struct xfs_inumbers *ig)
86{
87 struct compat_xfs_inogrp __user *p32 = breq->ubuffer;
88 struct xfs_inogrp ig1;
89 struct xfs_inogrp *igrp = &ig1;
90
91 xfs_inumbers_to_inogrp(&ig1, ig);
92
93 if (put_user(igrp->xi_startino, &p32->xi_startino) ||
94 put_user(igrp->xi_alloccount, &p32->xi_alloccount) ||
95 put_user(igrp->xi_allocmask, &p32->xi_allocmask))
96 return -EFAULT;
97
98 return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_inogrp));
99}
100
101#else
102#define xfs_fsinumbers_fmt_compat xfs_fsinumbers_fmt
103#endif /* BROKEN_X86_ALIGNMENT */
104
105STATIC int
106xfs_ioctl32_bstime_copyin(
107 xfs_bstime_t *bstime,
108 compat_xfs_bstime_t __user *bstime32)
109{
110 compat_time_t sec32; /* tv_sec differs on 64 vs. 32 */
111
112 if (get_user(sec32, &bstime32->tv_sec) ||
113 get_user(bstime->tv_nsec, &bstime32->tv_nsec))
114 return -EFAULT;
115 bstime->tv_sec = sec32;
116 return 0;
117}
118
119/*
120 * struct xfs_bstat has differing alignment on intel, & bstime_t sizes
121 * everywhere
122 */
123STATIC int
124xfs_ioctl32_bstat_copyin(
125 struct xfs_bstat *bstat,
126 struct compat_xfs_bstat __user *bstat32)
127{
128 if (get_user(bstat->bs_ino, &bstat32->bs_ino) ||
129 get_user(bstat->bs_mode, &bstat32->bs_mode) ||
130 get_user(bstat->bs_nlink, &bstat32->bs_nlink) ||
131 get_user(bstat->bs_uid, &bstat32->bs_uid) ||
132 get_user(bstat->bs_gid, &bstat32->bs_gid) ||
133 get_user(bstat->bs_rdev, &bstat32->bs_rdev) ||
134 get_user(bstat->bs_blksize, &bstat32->bs_blksize) ||
135 get_user(bstat->bs_size, &bstat32->bs_size) ||
136 xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) ||
137 xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) ||
138 xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) ||
139 get_user(bstat->bs_blocks, &bstat32->bs_size) ||
140 get_user(bstat->bs_xflags, &bstat32->bs_size) ||
141 get_user(bstat->bs_extsize, &bstat32->bs_extsize) ||
142 get_user(bstat->bs_extents, &bstat32->bs_extents) ||
143 get_user(bstat->bs_gen, &bstat32->bs_gen) ||
144 get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) ||
145 get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) ||
146 get_user(bstat->bs_forkoff, &bstat32->bs_forkoff) ||
147 get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) ||
148 get_user(bstat->bs_dmstate, &bstat32->bs_dmstate) ||
149 get_user(bstat->bs_aextents, &bstat32->bs_aextents))
150 return -EFAULT;
151 return 0;
152}
153
154/* XFS_IOC_FSBULKSTAT and friends */
155
156STATIC int
157xfs_bstime_store_compat(
158 compat_xfs_bstime_t __user *p32,
159 const xfs_bstime_t *p)
160{
161 __s32 sec32;
162
163 sec32 = p->tv_sec;
164 if (put_user(sec32, &p32->tv_sec) ||
165 put_user(p->tv_nsec, &p32->tv_nsec))
166 return -EFAULT;
167 return 0;
168}
169
170/* Return 0 on success or positive error (to xfs_bulkstat()) */
171STATIC int
172xfs_fsbulkstat_one_fmt_compat(
173 struct xfs_ibulk *breq,
174 const struct xfs_bulkstat *bstat)
175{
176 struct compat_xfs_bstat __user *p32 = breq->ubuffer;
177 struct xfs_bstat bs1;
178 struct xfs_bstat *buffer = &bs1;
179
180 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
181
182 if (put_user(buffer->bs_ino, &p32->bs_ino) ||
183 put_user(buffer->bs_mode, &p32->bs_mode) ||
184 put_user(buffer->bs_nlink, &p32->bs_nlink) ||
185 put_user(buffer->bs_uid, &p32->bs_uid) ||
186 put_user(buffer->bs_gid, &p32->bs_gid) ||
187 put_user(buffer->bs_rdev, &p32->bs_rdev) ||
188 put_user(buffer->bs_blksize, &p32->bs_blksize) ||
189 put_user(buffer->bs_size, &p32->bs_size) ||
190 xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
191 xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
192 xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
193 put_user(buffer->bs_blocks, &p32->bs_blocks) ||
194 put_user(buffer->bs_xflags, &p32->bs_xflags) ||
195 put_user(buffer->bs_extsize, &p32->bs_extsize) ||
196 put_user(buffer->bs_extents, &p32->bs_extents) ||
197 put_user(buffer->bs_gen, &p32->bs_gen) ||
198 put_user(buffer->bs_projid, &p32->bs_projid) ||
199 put_user(buffer->bs_projid_hi, &p32->bs_projid_hi) ||
200 put_user(buffer->bs_forkoff, &p32->bs_forkoff) ||
201 put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
202 put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
203 put_user(buffer->bs_aextents, &p32->bs_aextents))
204 return -EFAULT;
205
206 return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_bstat));
207}
208
209/* copied from xfs_ioctl.c */
210STATIC int
211xfs_compat_ioc_fsbulkstat(
212 xfs_mount_t *mp,
213 unsigned int cmd,
214 struct compat_xfs_fsop_bulkreq __user *p32)
215{
216 u32 addr;
217 struct xfs_fsop_bulkreq bulkreq;
218 struct xfs_ibulk breq = {
219 .mp = mp,
220 .ocount = 0,
221 };
222 xfs_ino_t lastino;
223 int error;
224
225 /*
226 * Output structure handling functions. Depending on the command,
227 * either the xfs_bstat and xfs_inogrp structures are written out
228 * to userpace memory via bulkreq.ubuffer. Normally the compat
229 * functions and structure size are the correct ones to use ...
230 */
231 inumbers_fmt_pf inumbers_func = xfs_fsinumbers_fmt_compat;
232 bulkstat_one_fmt_pf bs_one_func = xfs_fsbulkstat_one_fmt_compat;
233
234#ifdef CONFIG_X86_X32
235 if (in_x32_syscall()) {
236 /*
237 * ... but on x32 the input xfs_fsop_bulkreq has pointers
238 * which must be handled in the "compat" (32-bit) way, while
239 * the xfs_bstat and xfs_inogrp structures follow native 64-
240 * bit layout convention. So adjust accordingly, otherwise
241 * the data written out in compat layout will not match what
242 * x32 userspace expects.
243 */
244 inumbers_func = xfs_fsinumbers_fmt;
245 bs_one_func = xfs_fsbulkstat_one_fmt;
246 }
247#endif
248
249 /* done = 1 if there are more stats to get and if bulkstat */
250 /* should be called again (unused here, but used in dmapi) */
251
252 if (!capable(CAP_SYS_ADMIN))
253 return -EPERM;
254
255 if (XFS_FORCED_SHUTDOWN(mp))
256 return -EIO;
257
258 if (get_user(addr, &p32->lastip))
259 return -EFAULT;
260 bulkreq.lastip = compat_ptr(addr);
261 if (get_user(bulkreq.icount, &p32->icount) ||
262 get_user(addr, &p32->ubuffer))
263 return -EFAULT;
264 bulkreq.ubuffer = compat_ptr(addr);
265 if (get_user(addr, &p32->ocount))
266 return -EFAULT;
267 bulkreq.ocount = compat_ptr(addr);
268
269 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
270 return -EFAULT;
271
272 if (bulkreq.icount <= 0)
273 return -EINVAL;
274
275 if (bulkreq.ubuffer == NULL)
276 return -EINVAL;
277
278 breq.ubuffer = bulkreq.ubuffer;
279 breq.icount = bulkreq.icount;
280
281 /*
282 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
283 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
284 * that *lastip contains either zero or the number of the last inode to
285 * be examined by the previous call and return results starting with
286 * the next inode after that. The new bulk request back end functions
287 * take the inode to start with, so we have to compute the startino
288 * parameter from lastino to maintain correct function. lastino == 0
289 * is a special case because it has traditionally meant "first inode
290 * in filesystem".
291 */
292 if (cmd == XFS_IOC_FSINUMBERS_32) {
293 breq.startino = lastino ? lastino + 1 : 0;
294 error = xfs_inumbers(&breq, inumbers_func);
295 lastino = breq.startino - 1;
296 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
297 breq.startino = lastino;
298 breq.icount = 1;
299 error = xfs_bulkstat_one(&breq, bs_one_func);
300 lastino = breq.startino;
301 } else if (cmd == XFS_IOC_FSBULKSTAT_32) {
302 breq.startino = lastino ? lastino + 1 : 0;
303 error = xfs_bulkstat(&breq, bs_one_func);
304 lastino = breq.startino - 1;
305 } else {
306 error = -EINVAL;
307 }
308 if (error)
309 return error;
310
311 if (bulkreq.lastip != NULL &&
312 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
313 return -EFAULT;
314
315 if (bulkreq.ocount != NULL &&
316 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
317 return -EFAULT;
318
319 return 0;
320}
321
322STATIC int
323xfs_compat_handlereq_copyin(
324 xfs_fsop_handlereq_t *hreq,
325 compat_xfs_fsop_handlereq_t __user *arg32)
326{
327 compat_xfs_fsop_handlereq_t hreq32;
328
329 if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
330 return -EFAULT;
331
332 hreq->fd = hreq32.fd;
333 hreq->path = compat_ptr(hreq32.path);
334 hreq->oflags = hreq32.oflags;
335 hreq->ihandle = compat_ptr(hreq32.ihandle);
336 hreq->ihandlen = hreq32.ihandlen;
337 hreq->ohandle = compat_ptr(hreq32.ohandle);
338 hreq->ohandlen = compat_ptr(hreq32.ohandlen);
339
340 return 0;
341}
342
343STATIC struct dentry *
344xfs_compat_handlereq_to_dentry(
345 struct file *parfilp,
346 compat_xfs_fsop_handlereq_t *hreq)
347{
348 return xfs_handle_to_dentry(parfilp,
349 compat_ptr(hreq->ihandle), hreq->ihandlen);
350}
351
352STATIC int
353xfs_compat_attrlist_by_handle(
354 struct file *parfilp,
355 void __user *arg)
356{
357 int error;
358 attrlist_cursor_kern_t *cursor;
359 compat_xfs_fsop_attrlist_handlereq_t __user *p = arg;
360 compat_xfs_fsop_attrlist_handlereq_t al_hreq;
361 struct dentry *dentry;
362 char *kbuf;
363
364 if (!capable(CAP_SYS_ADMIN))
365 return -EPERM;
366 if (copy_from_user(&al_hreq, arg,
367 sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
368 return -EFAULT;
369 if (al_hreq.buflen < sizeof(struct attrlist) ||
370 al_hreq.buflen > XFS_XATTR_LIST_MAX)
371 return -EINVAL;
372
373 /*
374 * Reject flags, only allow namespaces.
375 */
376 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
377 return -EINVAL;
378
379 dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
380 if (IS_ERR(dentry))
381 return PTR_ERR(dentry);
382
383 error = -ENOMEM;
384 kbuf = kmem_zalloc_large(al_hreq.buflen, 0);
385 if (!kbuf)
386 goto out_dput;
387
388 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
389 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
390 al_hreq.flags, cursor);
391 if (error)
392 goto out_kfree;
393
394 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
395 error = -EFAULT;
396 goto out_kfree;
397 }
398
399 if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
400 error = -EFAULT;
401
402out_kfree:
403 kmem_free(kbuf);
404out_dput:
405 dput(dentry);
406 return error;
407}
408
409STATIC int
410xfs_compat_attrmulti_by_handle(
411 struct file *parfilp,
412 void __user *arg)
413{
414 int error;
415 compat_xfs_attr_multiop_t *ops;
416 compat_xfs_fsop_attrmulti_handlereq_t am_hreq;
417 struct dentry *dentry;
418 unsigned int i, size;
419 unsigned char *attr_name;
420
421 if (!capable(CAP_SYS_ADMIN))
422 return -EPERM;
423 if (copy_from_user(&am_hreq, arg,
424 sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
425 return -EFAULT;
426
427 /* overflow check */
428 if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
429 return -E2BIG;
430
431 dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
432 if (IS_ERR(dentry))
433 return PTR_ERR(dentry);
434
435 error = -E2BIG;
436 size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
437 if (!size || size > 16 * PAGE_SIZE)
438 goto out_dput;
439
440 ops = memdup_user(compat_ptr(am_hreq.ops), size);
441 if (IS_ERR(ops)) {
442 error = PTR_ERR(ops);
443 goto out_dput;
444 }
445
446 error = -ENOMEM;
447 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
448 if (!attr_name)
449 goto out_kfree_ops;
450
451 error = 0;
452 for (i = 0; i < am_hreq.opcount; i++) {
453 ops[i].am_error = strncpy_from_user((char *)attr_name,
454 compat_ptr(ops[i].am_attrname),
455 MAXNAMELEN);
456 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
457 error = -ERANGE;
458 if (ops[i].am_error < 0)
459 break;
460
461 switch (ops[i].am_opcode) {
462 case ATTR_OP_GET:
463 ops[i].am_error = xfs_attrmulti_attr_get(
464 d_inode(dentry), attr_name,
465 compat_ptr(ops[i].am_attrvalue),
466 &ops[i].am_length, ops[i].am_flags);
467 break;
468 case ATTR_OP_SET:
469 ops[i].am_error = mnt_want_write_file(parfilp);
470 if (ops[i].am_error)
471 break;
472 ops[i].am_error = xfs_attrmulti_attr_set(
473 d_inode(dentry), attr_name,
474 compat_ptr(ops[i].am_attrvalue),
475 ops[i].am_length, ops[i].am_flags);
476 mnt_drop_write_file(parfilp);
477 break;
478 case ATTR_OP_REMOVE:
479 ops[i].am_error = mnt_want_write_file(parfilp);
480 if (ops[i].am_error)
481 break;
482 ops[i].am_error = xfs_attrmulti_attr_remove(
483 d_inode(dentry), attr_name,
484 ops[i].am_flags);
485 mnt_drop_write_file(parfilp);
486 break;
487 default:
488 ops[i].am_error = -EINVAL;
489 }
490 }
491
492 if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
493 error = -EFAULT;
494
495 kfree(attr_name);
496 out_kfree_ops:
497 kfree(ops);
498 out_dput:
499 dput(dentry);
500 return error;
501}
502
503STATIC int
504xfs_compat_fssetdm_by_handle(
505 struct file *parfilp,
506 void __user *arg)
507{
508 int error;
509 struct fsdmidata fsd;
510 compat_xfs_fsop_setdm_handlereq_t dmhreq;
511 struct dentry *dentry;
512
513 if (!capable(CAP_MKNOD))
514 return -EPERM;
515 if (copy_from_user(&dmhreq, arg,
516 sizeof(compat_xfs_fsop_setdm_handlereq_t)))
517 return -EFAULT;
518
519 dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
520 if (IS_ERR(dentry))
521 return PTR_ERR(dentry);
522
523 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
524 error = -EPERM;
525 goto out;
526 }
527
528 if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
529 error = -EFAULT;
530 goto out;
531 }
532
533 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
534 fsd.fsd_dmstate);
535
536out:
537 dput(dentry);
538 return error;
539}
540
541long
542xfs_file_compat_ioctl(
543 struct file *filp,
544 unsigned cmd,
545 unsigned long p)
546{
547 struct inode *inode = file_inode(filp);
548 struct xfs_inode *ip = XFS_I(inode);
549 struct xfs_mount *mp = ip->i_mount;
550 void __user *arg = compat_ptr(p);
551 int error;
552
553 trace_xfs_file_compat_ioctl(ip);
554
555 switch (cmd) {
556#if defined(BROKEN_X86_ALIGNMENT)
557 case XFS_IOC_ALLOCSP_32:
558 case XFS_IOC_FREESP_32:
559 case XFS_IOC_ALLOCSP64_32:
560 case XFS_IOC_FREESP64_32:
561 case XFS_IOC_RESVSP_32:
562 case XFS_IOC_UNRESVSP_32:
563 case XFS_IOC_RESVSP64_32:
564 case XFS_IOC_UNRESVSP64_32:
565 case XFS_IOC_ZERO_RANGE_32: {
566 struct xfs_flock64 bf;
567
568 if (xfs_compat_flock64_copyin(&bf, arg))
569 return -EFAULT;
570 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
571 return xfs_ioc_space(filp, cmd, &bf);
572 }
573 case XFS_IOC_FSGEOMETRY_V1_32:
574 return xfs_compat_ioc_fsgeometry_v1(mp, arg);
575 case XFS_IOC_FSGROWFSDATA_32: {
576 struct xfs_growfs_data in;
577
578 if (xfs_compat_growfs_data_copyin(&in, arg))
579 return -EFAULT;
580 error = mnt_want_write_file(filp);
581 if (error)
582 return error;
583 error = xfs_growfs_data(mp, &in);
584 mnt_drop_write_file(filp);
585 return error;
586 }
587 case XFS_IOC_FSGROWFSRT_32: {
588 struct xfs_growfs_rt in;
589
590 if (xfs_compat_growfs_rt_copyin(&in, arg))
591 return -EFAULT;
592 error = mnt_want_write_file(filp);
593 if (error)
594 return error;
595 error = xfs_growfs_rt(mp, &in);
596 mnt_drop_write_file(filp);
597 return error;
598 }
599#endif
600 /* long changes size, but xfs only copiese out 32 bits */
601 case XFS_IOC_GETXFLAGS_32:
602 case XFS_IOC_SETXFLAGS_32:
603 case XFS_IOC_GETVERSION_32:
604 cmd = _NATIVE_IOC(cmd, long);
605 return xfs_file_ioctl(filp, cmd, p);
606 case XFS_IOC_SWAPEXT_32: {
607 struct xfs_swapext sxp;
608 struct compat_xfs_swapext __user *sxu = arg;
609
610 /* Bulk copy in up to the sx_stat field, then copy bstat */
611 if (copy_from_user(&sxp, sxu,
612 offsetof(struct xfs_swapext, sx_stat)) ||
613 xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
614 return -EFAULT;
615 error = mnt_want_write_file(filp);
616 if (error)
617 return error;
618 error = xfs_ioc_swapext(&sxp);
619 mnt_drop_write_file(filp);
620 return error;
621 }
622 case XFS_IOC_FSBULKSTAT_32:
623 case XFS_IOC_FSBULKSTAT_SINGLE_32:
624 case XFS_IOC_FSINUMBERS_32:
625 return xfs_compat_ioc_fsbulkstat(mp, cmd, arg);
626 case XFS_IOC_FD_TO_HANDLE_32:
627 case XFS_IOC_PATH_TO_HANDLE_32:
628 case XFS_IOC_PATH_TO_FSHANDLE_32: {
629 struct xfs_fsop_handlereq hreq;
630
631 if (xfs_compat_handlereq_copyin(&hreq, arg))
632 return -EFAULT;
633 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
634 return xfs_find_handle(cmd, &hreq);
635 }
636 case XFS_IOC_OPEN_BY_HANDLE_32: {
637 struct xfs_fsop_handlereq hreq;
638
639 if (xfs_compat_handlereq_copyin(&hreq, arg))
640 return -EFAULT;
641 return xfs_open_by_handle(filp, &hreq);
642 }
643 case XFS_IOC_READLINK_BY_HANDLE_32: {
644 struct xfs_fsop_handlereq hreq;
645
646 if (xfs_compat_handlereq_copyin(&hreq, arg))
647 return -EFAULT;
648 return xfs_readlink_by_handle(filp, &hreq);
649 }
650 case XFS_IOC_ATTRLIST_BY_HANDLE_32:
651 return xfs_compat_attrlist_by_handle(filp, arg);
652 case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
653 return xfs_compat_attrmulti_by_handle(filp, arg);
654 case XFS_IOC_FSSETDM_BY_HANDLE_32:
655 return xfs_compat_fssetdm_by_handle(filp, arg);
656 default:
657 /* try the native version */
658 return xfs_file_ioctl(filp, cmd, (unsigned long)arg);
659 }
660}