root/fs/xfs/xfs_ioctl32.c

DEFINITIONS

1. xfs_compat_flock64_copyin
2. xfs_compat_ioc_fsgeometry_v1
3. xfs_compat_growfs_data_copyin
4. xfs_compat_growfs_rt_copyin
5. xfs_fsinumbers_fmt_compat
6. xfs_ioctl32_bstime_copyin
7. xfs_ioctl32_bstat_copyin
8. xfs_bstime_store_compat
9. xfs_fsbulkstat_one_fmt_compat
10. xfs_compat_ioc_fsbulkstat
11. xfs_compat_handlereq_copyin
12. xfs_compat_handlereq_to_dentry
13. xfs_compat_attrlist_by_handle
14. xfs_compat_attrmulti_by_handle
15. xfs_compat_fssetdm_by_handle
16. xfs_file_compat_ioctl

   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, 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 
 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_flags &= ~ATTR_KERNEL_FLAGS;
 454 
 455                 ops[i].am_error = strncpy_from_user((char *)attr_name,
 456                                 compat_ptr(ops[i].am_attrname),
 457                                 MAXNAMELEN);
 458                 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
 459                         error = -ERANGE;
 460                 if (ops[i].am_error < 0)
 461                         break;
 462 
 463                 switch (ops[i].am_opcode) {
 464                 case ATTR_OP_GET:
 465                         ops[i].am_error = xfs_attrmulti_attr_get(
 466                                         d_inode(dentry), attr_name,
 467                                         compat_ptr(ops[i].am_attrvalue),
 468                                         &ops[i].am_length, ops[i].am_flags);
 469                         break;
 470                 case ATTR_OP_SET:
 471                         ops[i].am_error = mnt_want_write_file(parfilp);
 472                         if (ops[i].am_error)
 473                                 break;
 474                         ops[i].am_error = xfs_attrmulti_attr_set(
 475                                         d_inode(dentry), attr_name,
 476                                         compat_ptr(ops[i].am_attrvalue),
 477                                         ops[i].am_length, ops[i].am_flags);
 478                         mnt_drop_write_file(parfilp);
 479                         break;
 480                 case ATTR_OP_REMOVE:
 481                         ops[i].am_error = mnt_want_write_file(parfilp);
 482                         if (ops[i].am_error)
 483                                 break;
 484                         ops[i].am_error = xfs_attrmulti_attr_remove(
 485                                         d_inode(dentry), attr_name,
 486                                         ops[i].am_flags);
 487                         mnt_drop_write_file(parfilp);
 488                         break;
 489                 default:
 490                         ops[i].am_error = -EINVAL;
 491                 }
 492         }
 493 
 494         if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
 495                 error = -EFAULT;
 496 
 497         kfree(attr_name);
 498  out_kfree_ops:
 499         kfree(ops);
 500  out_dput:
 501         dput(dentry);
 502         return error;
 503 }
 504 
 505 STATIC int
 506 xfs_compat_fssetdm_by_handle(
 507         struct file             *parfilp,
 508         void                    __user *arg)
 509 {
 510         int                     error;
 511         struct fsdmidata        fsd;
 512         compat_xfs_fsop_setdm_handlereq_t dmhreq;
 513         struct dentry           *dentry;
 514 
 515         if (!capable(CAP_MKNOD))
 516                 return -EPERM;
 517         if (copy_from_user(&dmhreq, arg,
 518                            sizeof(compat_xfs_fsop_setdm_handlereq_t)))
 519                 return -EFAULT;
 520 
 521         dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
 522         if (IS_ERR(dentry))
 523                 return PTR_ERR(dentry);
 524 
 525         if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
 526                 error = -EPERM;
 527                 goto out;
 528         }
 529 
 530         if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
 531                 error = -EFAULT;
 532                 goto out;
 533         }
 534 
 535         error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
 536                                  fsd.fsd_dmstate);
 537 
 538 out:
 539         dput(dentry);
 540         return error;
 541 }
 542 
 543 long
 544 xfs_file_compat_ioctl(
 545         struct file             *filp,
 546         unsigned                cmd,
 547         unsigned long           p)
 548 {
 549         struct inode            *inode = file_inode(filp);
 550         struct xfs_inode        *ip = XFS_I(inode);
 551         struct xfs_mount        *mp = ip->i_mount;
 552         void                    __user *arg = compat_ptr(p);
 553         int                     error;
 554 
 555         trace_xfs_file_compat_ioctl(ip);
 556 
 557         switch (cmd) {
 558 #if defined(BROKEN_X86_ALIGNMENT)
 559         case XFS_IOC_ALLOCSP_32:
 560         case XFS_IOC_FREESP_32:
 561         case XFS_IOC_ALLOCSP64_32:
 562         case XFS_IOC_FREESP64_32:
 563         case XFS_IOC_RESVSP_32:
 564         case XFS_IOC_UNRESVSP_32:
 565         case XFS_IOC_RESVSP64_32:
 566         case XFS_IOC_UNRESVSP64_32:
 567         case XFS_IOC_ZERO_RANGE_32: {
 568                 struct xfs_flock64      bf;
 569 
 570                 if (xfs_compat_flock64_copyin(&bf, arg))
 571                         return -EFAULT;
 572                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 573                 return xfs_ioc_space(filp, cmd, &bf);
 574         }
 575         case XFS_IOC_FSGEOMETRY_V1_32:
 576                 return xfs_compat_ioc_fsgeometry_v1(mp, arg);
 577         case XFS_IOC_FSGROWFSDATA_32: {
 578                 struct xfs_growfs_data  in;
 579 
 580                 if (xfs_compat_growfs_data_copyin(&in, arg))
 581                         return -EFAULT;
 582                 error = mnt_want_write_file(filp);
 583                 if (error)
 584                         return error;
 585                 error = xfs_growfs_data(mp, &in);
 586                 mnt_drop_write_file(filp);
 587                 return error;
 588         }
 589         case XFS_IOC_FSGROWFSRT_32: {
 590                 struct xfs_growfs_rt    in;
 591 
 592                 if (xfs_compat_growfs_rt_copyin(&in, arg))
 593                         return -EFAULT;
 594                 error = mnt_want_write_file(filp);
 595                 if (error)
 596                         return error;
 597                 error = xfs_growfs_rt(mp, &in);
 598                 mnt_drop_write_file(filp);
 599                 return error;
 600         }
 601 #endif
 602         /* long changes size, but xfs only copiese out 32 bits */
 603         case XFS_IOC_GETXFLAGS_32:
 604         case XFS_IOC_SETXFLAGS_32:
 605         case XFS_IOC_GETVERSION_32:
 606                 cmd = _NATIVE_IOC(cmd, long);
 607                 return xfs_file_ioctl(filp, cmd, p);
 608         case XFS_IOC_SWAPEXT_32: {
 609                 struct xfs_swapext        sxp;
 610                 struct compat_xfs_swapext __user *sxu = arg;
 611 
 612                 /* Bulk copy in up to the sx_stat field, then copy bstat */
 613                 if (copy_from_user(&sxp, sxu,
 614                                    offsetof(struct xfs_swapext, sx_stat)) ||
 615                     xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
 616                         return -EFAULT;
 617                 error = mnt_want_write_file(filp);
 618                 if (error)
 619                         return error;
 620                 error = xfs_ioc_swapext(&sxp);
 621                 mnt_drop_write_file(filp);
 622                 return error;
 623         }
 624         case XFS_IOC_FSBULKSTAT_32:
 625         case XFS_IOC_FSBULKSTAT_SINGLE_32:
 626         case XFS_IOC_FSINUMBERS_32:
 627                 return xfs_compat_ioc_fsbulkstat(mp, cmd, arg);
 628         case XFS_IOC_FD_TO_HANDLE_32:
 629         case XFS_IOC_PATH_TO_HANDLE_32:
 630         case XFS_IOC_PATH_TO_FSHANDLE_32: {
 631                 struct xfs_fsop_handlereq       hreq;
 632 
 633                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 634                         return -EFAULT;
 635                 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
 636                 return xfs_find_handle(cmd, &hreq);
 637         }
 638         case XFS_IOC_OPEN_BY_HANDLE_32: {
 639                 struct xfs_fsop_handlereq       hreq;
 640 
 641                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 642                         return -EFAULT;
 643                 return xfs_open_by_handle(filp, &hreq);
 644         }
 645         case XFS_IOC_READLINK_BY_HANDLE_32: {
 646                 struct xfs_fsop_handlereq       hreq;
 647 
 648                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 649                         return -EFAULT;
 650                 return xfs_readlink_by_handle(filp, &hreq);
 651         }
 652         case XFS_IOC_ATTRLIST_BY_HANDLE_32:
 653                 return xfs_compat_attrlist_by_handle(filp, arg);
 654         case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
 655                 return xfs_compat_attrmulti_by_handle(filp, arg);
 656         case XFS_IOC_FSSETDM_BY_HANDLE_32:
 657                 return xfs_compat_fssetdm_by_handle(filp, arg);
 658         default:
 659                 /* try the native version */
 660                 return xfs_file_ioctl(filp, cmd, (unsigned long)arg);
 661         }
 662 }