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TOMOYO Linux Cross Reference
Linux/fs/xfs/xfs_ioctl32.c

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  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
 30 STATIC int
 31 xfs_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 
 46 STATIC int
 47 xfs_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 
 60 STATIC int
 61 xfs_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 
 71 STATIC int
 72 xfs_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 
 82 STATIC int
 83 xfs_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 
105 STATIC int
106 xfs_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  */
123 STATIC int
124 xfs_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 
156 STATIC int
157 xfs_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()) */
171 STATIC int
172 xfs_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 */
210 STATIC int
211 xfs_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 
322 STATIC int
323 xfs_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 
343 STATIC struct dentry *
344 xfs_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 
352 STATIC int
353 xfs_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, KM_SLEEP);
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 
402 out_kfree:
403         kmem_free(kbuf);
404 out_dput:
405         dput(dentry);
406         return error;
407 }
408 
409 STATIC int
410 xfs_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 
503 STATIC int
504 xfs_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 
536 out:
537         dput(dentry);
538         return error;
539 }
540 
541 long
542 xfs_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 }
661 

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