fs/xfs/xfs_ioctl32.c

   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
  41 #define  _NATIVE_IOC(cmd, type) \
  42           _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
  43
  44 #ifdef BROKEN_X86_ALIGNMENT
  45 STATIC int
  46 xfs_compat_flock64_copyin(
  47         xfs_flock64_t           *bf,
  48         compat_xfs_flock64_t    __user *arg32)
  49 {
  50         if (get_user(bf->l_type,        &arg32->l_type) ||
  51             get_user(bf->l_whence,      &arg32->l_whence) ||
  52             get_user(bf->l_start,       &arg32->l_start) ||
  53             get_user(bf->l_len,         &arg32->l_len) ||
  54             get_user(bf->l_sysid,       &arg32->l_sysid) ||
  55             get_user(bf->l_pid,         &arg32->l_pid) ||
  56             copy_from_user(bf->l_pad,   &arg32->l_pad,  4*sizeof(u32)))
  57                 return -EFAULT;
  58         return 0;
  59 }
  60
  61 STATIC int
  62 xfs_compat_ioc_fsgeometry_v1(
  63         struct xfs_mount          *mp,
  64         compat_xfs_fsop_geom_v1_t __user *arg32)
  65 {
  66         xfs_fsop_geom_t           fsgeo;
  67         int                       error;
  68
  69         error = xfs_fs_geometry(mp, &fsgeo, 3);
  70         if (error)
  71                 return error;
  72         /* The 32-bit variant simply has some padding at the end */
  73         if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
  74                 return -EFAULT;
  75         return 0;
  76 }
  77
  78 STATIC int
  79 xfs_compat_growfs_data_copyin(
  80         struct xfs_growfs_data   *in,
  81         compat_xfs_growfs_data_t __user *arg32)
  82 {
  83         if (get_user(in->newblocks, &arg32->newblocks) ||
  84             get_user(in->imaxpct,   &arg32->imaxpct))
  85                 return -EFAULT;
  86         return 0;
  87 }
  88
  89 STATIC int
  90 xfs_compat_growfs_rt_copyin(
  91         struct xfs_growfs_rt     *in,
  92         compat_xfs_growfs_rt_t  __user *arg32)
  93 {
  94         if (get_user(in->newblocks, &arg32->newblocks) ||
  95             get_user(in->extsize,   &arg32->extsize))
  96                 return -EFAULT;
  97         return 0;
  98 }
  99
 100 STATIC int
 101 xfs_inumbers_fmt_compat(
 102         void                    __user *ubuffer,
 103         const struct xfs_inogrp *buffer,
 104         long                    count,
 105         long                    *written)
 106 {
 107         compat_xfs_inogrp_t     __user *p32 = ubuffer;
 108         long                    i;
 109
 110         for (i = 0; i < count; i++) {
 111                 if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
 112                     put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
 113                     put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
 114                         return -EFAULT;
 115         }
 116         *written = count * sizeof(*p32);
 117         return 0;
 118 }
 119
 120 #else
 121 #define xfs_inumbers_fmt_compat xfs_inumbers_fmt
 122 #endif  /* BROKEN_X86_ALIGNMENT */
 123
 124 STATIC int
 125 xfs_ioctl32_bstime_copyin(
 126         xfs_bstime_t            *bstime,
 127         compat_xfs_bstime_t     __user *bstime32)
 128 {
 129         compat_time_t           sec32;  /* tv_sec differs on 64 vs. 32 */
 130
 131         if (get_user(sec32,             &bstime32->tv_sec)      ||
 132             get_user(bstime->tv_nsec,   &bstime32->tv_nsec))
 133                 return -EFAULT;
 134         bstime->tv_sec = sec32;
 135         return 0;
 136 }
 137
 138 /* xfs_bstat_t has differing alignment on intel, & bstime_t sizes everywhere */
 139 STATIC int
 140 xfs_ioctl32_bstat_copyin(
 141         xfs_bstat_t             *bstat,
 142         compat_xfs_bstat_t      __user *bstat32)
 143 {
 144         if (get_user(bstat->bs_ino,     &bstat32->bs_ino)       ||
 145             get_user(bstat->bs_mode,    &bstat32->bs_mode)      ||
 146             get_user(bstat->bs_nlink,   &bstat32->bs_nlink)     ||
 147             get_user(bstat->bs_uid,     &bstat32->bs_uid)       ||
 148             get_user(bstat->bs_gid,     &bstat32->bs_gid)       ||
 149             get_user(bstat->bs_rdev,    &bstat32->bs_rdev)      ||
 150             get_user(bstat->bs_blksize, &bstat32->bs_blksize)   ||
 151             get_user(bstat->bs_size,    &bstat32->bs_size)      ||
 152             xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) ||
 153             xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) ||
 154             xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) ||
 155             get_user(bstat->bs_blocks,  &bstat32->bs_size)      ||
 156             get_user(bstat->bs_xflags,  &bstat32->bs_size)      ||
 157             get_user(bstat->bs_extsize, &bstat32->bs_extsize)   ||
 158             get_user(bstat->bs_extents, &bstat32->bs_extents)   ||
 159             get_user(bstat->bs_gen,     &bstat32->bs_gen)       ||
 160             get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) ||
 161             get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) ||
 162             get_user(bstat->bs_forkoff, &bstat32->bs_forkoff)   ||
 163             get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) ||
 164             get_user(bstat->bs_dmstate, &bstat32->bs_dmstate)   ||
 165             get_user(bstat->bs_aextents, &bstat32->bs_aextents))
 166                 return -EFAULT;
 167         return 0;
 168 }
 169
 170 /* XFS_IOC_FSBULKSTAT and friends */
 171
 172 STATIC int
 173 xfs_bstime_store_compat(
 174         compat_xfs_bstime_t     __user *p32,
 175         const xfs_bstime_t      *p)
 176 {
 177         __s32                   sec32;
 178
 179         sec32 = p->tv_sec;
 180         if (put_user(sec32, &p32->tv_sec) ||
 181             put_user(p->tv_nsec, &p32->tv_nsec))
 182                 return -EFAULT;
 183         return 0;
 184 }
 185
 186 /* Return 0 on success or positive error (to xfs_bulkstat()) */
 187 STATIC int
 188 xfs_bulkstat_one_fmt_compat(
 189         void                    __user *ubuffer,
 190         int                     ubsize,
 191         int                     *ubused,
 192         const xfs_bstat_t       *buffer)
 193 {
 194         compat_xfs_bstat_t      __user *p32 = ubuffer;
 195
 196         if (ubsize < sizeof(*p32))
 197                 return -ENOMEM;
 198
 199         if (put_user(buffer->bs_ino,      &p32->bs_ino)         ||
 200             put_user(buffer->bs_mode,     &p32->bs_mode)        ||
 201             put_user(buffer->bs_nlink,    &p32->bs_nlink)       ||
 202             put_user(buffer->bs_uid,      &p32->bs_uid)         ||
 203             put_user(buffer->bs_gid,      &p32->bs_gid)         ||
 204             put_user(buffer->bs_rdev,     &p32->bs_rdev)        ||
 205             put_user(buffer->bs_blksize,  &p32->bs_blksize)     ||
 206             put_user(buffer->bs_size,     &p32->bs_size)        ||
 207             xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
 208             xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
 209             xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
 210             put_user(buffer->bs_blocks,   &p32->bs_blocks)      ||
 211             put_user(buffer->bs_xflags,   &p32->bs_xflags)      ||
 212             put_user(buffer->bs_extsize,  &p32->bs_extsize)     ||
 213             put_user(buffer->bs_extents,  &p32->bs_extents)     ||
 214             put_user(buffer->bs_gen,      &p32->bs_gen)         ||
 215             put_user(buffer->bs_projid,   &p32->bs_projid)      ||
 216             put_user(buffer->bs_projid_hi,      &p32->bs_projid_hi)     ||
 217             put_user(buffer->bs_forkoff,  &p32->bs_forkoff)     ||
 218             put_user(buffer->bs_dmevmask, &p32->bs_dmevmask)    ||
 219             put_user(buffer->bs_dmstate,  &p32->bs_dmstate)     ||
 220             put_user(buffer->bs_aextents, &p32->bs_aextents))
 221                 return -EFAULT;
 222         if (ubused)
 223                 *ubused = sizeof(*p32);
 224         return 0;
 225 }
 226
 227 STATIC int
 228 xfs_bulkstat_one_compat(
 229         xfs_mount_t     *mp,            /* mount point for filesystem */
 230         xfs_ino_t       ino,            /* inode number to get data for */
 231         void            __user *buffer, /* buffer to place output in */
 232         int             ubsize,         /* size of buffer */
 233         int             *ubused,        /* bytes used by me */
 234         int             *stat)          /* BULKSTAT_RV_... */
 235 {
 236         return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
 237                                     xfs_bulkstat_one_fmt_compat,
 238                                     ubused, stat);
 239 }
 240
 241 /* copied from xfs_ioctl.c */
 242 STATIC int
 243 xfs_compat_ioc_bulkstat(
 244         xfs_mount_t               *mp,
 245         unsigned int              cmd,
 246         compat_xfs_fsop_bulkreq_t __user *p32)
 247 {
 248         u32                     addr;
 249         xfs_fsop_bulkreq_t      bulkreq;
 250         int                     count;  /* # of records returned */
 251         xfs_ino_t               inlast; /* last inode number */
 252         int                     done;
 253         int                     error;
 254
 255         /*
 256          * Output structure handling functions.  Depending on the command,
 257          * either the xfs_bstat and xfs_inogrp structures are written out
 258          * to userpace memory via bulkreq.ubuffer.  Normally the compat
 259          * functions and structure size are the correct ones to use ...
 260          */
 261         inumbers_fmt_pf inumbers_func = xfs_inumbers_fmt_compat;
 262         bulkstat_one_pf bs_one_func = xfs_bulkstat_one_compat;
 263         size_t bs_one_size = sizeof(struct compat_xfs_bstat);
 264
 265 #ifdef CONFIG_X86_X32
 266         if (in_x32_syscall()) {
 267                 /*
 268                  * ... but on x32 the input xfs_fsop_bulkreq has pointers
 269                  * which must be handled in the "compat" (32-bit) way, while
 270                  * the xfs_bstat and xfs_inogrp structures follow native 64-
 271                  * bit layout convention.  So adjust accordingly, otherwise
 272                  * the data written out in compat layout will not match what
 273                  * x32 userspace expects.
 274                  */
 275                 inumbers_func = xfs_inumbers_fmt;
 276                 bs_one_func = xfs_bulkstat_one;
 277                 bs_one_size = sizeof(struct xfs_bstat);
 278         }
 279 #endif
 280
 281         /* done = 1 if there are more stats to get and if bulkstat */
 282         /* should be called again (unused here, but used in dmapi) */
 283
 284         if (!capable(CAP_SYS_ADMIN))
 285                 return -EPERM;
 286
 287         if (XFS_FORCED_SHUTDOWN(mp))
 288                 return -EIO;
 289
 290         if (get_user(addr, &p32->lastip))
 291                 return -EFAULT;
 292         bulkreq.lastip = compat_ptr(addr);
 293         if (get_user(bulkreq.icount, &p32->icount) ||
 294             get_user(addr, &p32->ubuffer))
 295                 return -EFAULT;
 296         bulkreq.ubuffer = compat_ptr(addr);
 297         if (get_user(addr, &p32->ocount))
 298                 return -EFAULT;
 299         bulkreq.ocount = compat_ptr(addr);
 300
 301         if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
 302                 return -EFAULT;
 303
 304         if ((count = bulkreq.icount) <= 0)
 305                 return -EINVAL;
 306
 307         if (bulkreq.ubuffer == NULL)
 308                 return -EINVAL;
 309
 310         if (cmd == XFS_IOC_FSINUMBERS_32) {
 311                 error = xfs_inumbers(mp, &inlast, &count,
 312                                 bulkreq.ubuffer, inumbers_func);
 313         } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
 314                 int res;
 315
 316                 error = bs_one_func(mp, inlast, bulkreq.ubuffer,
 317                                 bs_one_size, NULL, &res);
 318         } else if (cmd == XFS_IOC_FSBULKSTAT_32) {
 319                 error = xfs_bulkstat(mp, &inlast, &count,
 320                         bs_one_func, bs_one_size,
 321                         bulkreq.ubuffer, &done);
 322         } else
 323                 error = -EINVAL;
 324         if (error)
 325                 return error;
 326
 327         if (bulkreq.ocount != NULL) {
 328                 if (copy_to_user(bulkreq.lastip, &inlast,
 329                                                 sizeof(xfs_ino_t)))
 330                         return -EFAULT;
 331
 332                 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
 333                         return -EFAULT;
 334         }
 335
 336         return 0;
 337 }
 338
 339 STATIC int
 340 xfs_compat_handlereq_copyin(
 341         xfs_fsop_handlereq_t            *hreq,
 342         compat_xfs_fsop_handlereq_t     __user *arg32)
 343 {
 344         compat_xfs_fsop_handlereq_t     hreq32;
 345
 346         if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
 347                 return -EFAULT;
 348
 349         hreq->fd = hreq32.fd;
 350         hreq->path = compat_ptr(hreq32.path);
 351         hreq->oflags = hreq32.oflags;
 352         hreq->ihandle = compat_ptr(hreq32.ihandle);
 353         hreq->ihandlen = hreq32.ihandlen;
 354         hreq->ohandle = compat_ptr(hreq32.ohandle);
 355         hreq->ohandlen = compat_ptr(hreq32.ohandlen);
 356
 357         return 0;
 358 }
 359
 360 STATIC struct dentry *
 361 xfs_compat_handlereq_to_dentry(
 362         struct file             *parfilp,
 363         compat_xfs_fsop_handlereq_t *hreq)
 364 {
 365         return xfs_handle_to_dentry(parfilp,
 366                         compat_ptr(hreq->ihandle), hreq->ihandlen);
 367 }
 368
 369 STATIC int
 370 xfs_compat_attrlist_by_handle(
 371         struct file             *parfilp,
 372         void                    __user *arg)
 373 {
 374         int                     error;
 375         attrlist_cursor_kern_t  *cursor;
 376         compat_xfs_fsop_attrlist_handlereq_t __user *p = arg;
 377         compat_xfs_fsop_attrlist_handlereq_t al_hreq;
 378         struct dentry           *dentry;
 379         char                    *kbuf;
 380
 381         if (!capable(CAP_SYS_ADMIN))
 382                 return -EPERM;
 383         if (copy_from_user(&al_hreq, arg,
 384                            sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
 385                 return -EFAULT;
 386         if (al_hreq.buflen < sizeof(struct attrlist) ||
 387             al_hreq.buflen > XFS_XATTR_LIST_MAX)
 388                 return -EINVAL;
 389
 390         /*
 391          * Reject flags, only allow namespaces.
 392          */
 393         if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
 394                 return -EINVAL;
 395
 396         dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
 397         if (IS_ERR(dentry))
 398                 return PTR_ERR(dentry);
 399
 400         error = -ENOMEM;
 401         kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
 402         if (!kbuf)
 403                 goto out_dput;
 404
 405         cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
 406         error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
 407                                         al_hreq.flags, cursor);
 408         if (error)
 409                 goto out_kfree;
 410
 411         if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
 412                 error = -EFAULT;
 413                 goto out_kfree;
 414         }
 415
 416         if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
 417                 error = -EFAULT;
 418
 419 out_kfree:
 420         kmem_free(kbuf);
 421 out_dput:
 422         dput(dentry);
 423         return error;
 424 }
 425
 426 STATIC int
 427 xfs_compat_attrmulti_by_handle(
 428         struct file                             *parfilp,
 429         void                                    __user *arg)
 430 {
 431         int                                     error;
 432         compat_xfs_attr_multiop_t               *ops;
 433         compat_xfs_fsop_attrmulti_handlereq_t   am_hreq;
 434         struct dentry                           *dentry;
 435         unsigned int                            i, size;
 436         unsigned char                           *attr_name;
 437
 438         if (!capable(CAP_SYS_ADMIN))
 439                 return -EPERM;
 440         if (copy_from_user(&am_hreq, arg,
 441                            sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
 442                 return -EFAULT;
 443
 444         /* overflow check */
 445         if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
 446                 return -E2BIG;
 447
 448         dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
 449         if (IS_ERR(dentry))
 450                 return PTR_ERR(dentry);
 451
 452         error = -E2BIG;
 453         size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
 454         if (!size || size > 16 * PAGE_SIZE)
 455                 goto out_dput;
 456
 457         ops = memdup_user(compat_ptr(am_hreq.ops), size);
 458         if (IS_ERR(ops)) {
 459                 error = PTR_ERR(ops);
 460                 goto out_dput;
 461         }
 462
 463         error = -ENOMEM;
 464         attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
 465         if (!attr_name)
 466                 goto out_kfree_ops;
 467
 468         error = 0;
 469         for (i = 0; i < am_hreq.opcount; i++) {
 470                 ops[i].am_error = strncpy_from_user((char *)attr_name,
 471                                 compat_ptr(ops[i].am_attrname),
 472                                 MAXNAMELEN);
 473                 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
 474                         error = -ERANGE;
 475                 if (ops[i].am_error < 0)
 476                         break;
 477
 478                 switch (ops[i].am_opcode) {
 479                 case ATTR_OP_GET:
 480                         ops[i].am_error = xfs_attrmulti_attr_get(
 481                                         d_inode(dentry), attr_name,
 482                                         compat_ptr(ops[i].am_attrvalue),
 483                                         &ops[i].am_length, ops[i].am_flags);
 484                         break;
 485                 case ATTR_OP_SET:
 486                         ops[i].am_error = mnt_want_write_file(parfilp);
 487                         if (ops[i].am_error)
 488                                 break;
 489                         ops[i].am_error = xfs_attrmulti_attr_set(
 490                                         d_inode(dentry), attr_name,
 491                                         compat_ptr(ops[i].am_attrvalue),
 492                                         ops[i].am_length, ops[i].am_flags);
 493                         mnt_drop_write_file(parfilp);
 494                         break;
 495                 case ATTR_OP_REMOVE:
 496                         ops[i].am_error = mnt_want_write_file(parfilp);
 497                         if (ops[i].am_error)
 498                                 break;
 499                         ops[i].am_error = xfs_attrmulti_attr_remove(
 500                                         d_inode(dentry), attr_name,
 501                                         ops[i].am_flags);
 502                         mnt_drop_write_file(parfilp);
 503                         break;
 504                 default:
 505                         ops[i].am_error = -EINVAL;
 506                 }
 507         }
 508
 509         if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
 510                 error = -EFAULT;
 511
 512         kfree(attr_name);
 513  out_kfree_ops:
 514         kfree(ops);
 515  out_dput:
 516         dput(dentry);
 517         return error;
 518 }
 519
 520 STATIC int
 521 xfs_compat_fssetdm_by_handle(
 522         struct file             *parfilp,
 523         void                    __user *arg)
 524 {
 525         int                     error;
 526         struct fsdmidata        fsd;
 527         compat_xfs_fsop_setdm_handlereq_t dmhreq;
 528         struct dentry           *dentry;
 529
 530         if (!capable(CAP_MKNOD))
 531                 return -EPERM;
 532         if (copy_from_user(&dmhreq, arg,
 533                            sizeof(compat_xfs_fsop_setdm_handlereq_t)))
 534                 return -EFAULT;
 535
 536         dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
 537         if (IS_ERR(dentry))
 538                 return PTR_ERR(dentry);
 539
 540         if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
 541                 error = -EPERM;
 542                 goto out;
 543         }
 544
 545         if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
 546                 error = -EFAULT;
 547                 goto out;
 548         }
 549
 550         error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
 551                                  fsd.fsd_dmstate);
 552
 553 out:
 554         dput(dentry);
 555         return error;
 556 }
 557
 558 long
 559 xfs_file_compat_ioctl(
 560         struct file             *filp,
 561         unsigned                cmd,
 562         unsigned long           p)
 563 {
 564         struct inode            *inode = file_inode(filp);
 565         struct xfs_inode        *ip = XFS_I(inode);
 566         struct xfs_mount        *mp = ip->i_mount;
 567         void                    __user *arg = (void __user *)p;
 568         int                     error;
 569
 570         trace_xfs_file_compat_ioctl(ip);
 571
 572         switch (cmd) {
 573         /* No size or alignment issues on any arch */
 574         case XFS_IOC_DIOINFO:
 575         case XFS_IOC_FSGEOMETRY:
 576         case XFS_IOC_FSGETXATTR:
 577         case XFS_IOC_FSSETXATTR:
 578         case XFS_IOC_FSGETXATTRA:
 579         case XFS_IOC_FSSETDM:
 580         case XFS_IOC_GETBMAP:
 581         case XFS_IOC_GETBMAPA:
 582         case XFS_IOC_GETBMAPX:
 583         case XFS_IOC_FSCOUNTS:
 584         case XFS_IOC_SET_RESBLKS:
 585         case XFS_IOC_GET_RESBLKS:
 586         case XFS_IOC_FSGROWFSLOG:
 587         case XFS_IOC_GOINGDOWN:
 588         case XFS_IOC_ERROR_INJECTION:
 589         case XFS_IOC_ERROR_CLEARALL:
 590         case FS_IOC_GETFSMAP:
 591                 return xfs_file_ioctl(filp, cmd, p);
 592 #ifndef BROKEN_X86_ALIGNMENT
 593         /* These are handled fine if no alignment issues */
 594         case XFS_IOC_ALLOCSP:
 595         case XFS_IOC_FREESP:
 596         case XFS_IOC_RESVSP:
 597         case XFS_IOC_UNRESVSP:
 598         case XFS_IOC_ALLOCSP64:
 599         case XFS_IOC_FREESP64:
 600         case XFS_IOC_RESVSP64:
 601         case XFS_IOC_UNRESVSP64:
 602         case XFS_IOC_FSGEOMETRY_V1:
 603         case XFS_IOC_FSGROWFSDATA:
 604         case XFS_IOC_FSGROWFSRT:
 605         case XFS_IOC_ZERO_RANGE:
 606                 return xfs_file_ioctl(filp, cmd, p);
 607 #else
 608         case XFS_IOC_ALLOCSP_32:
 609         case XFS_IOC_FREESP_32:
 610         case XFS_IOC_ALLOCSP64_32:
 611         case XFS_IOC_FREESP64_32:
 612         case XFS_IOC_RESVSP_32:
 613         case XFS_IOC_UNRESVSP_32:
 614         case XFS_IOC_RESVSP64_32:
 615         case XFS_IOC_UNRESVSP64_32:
 616         case XFS_IOC_ZERO_RANGE_32: {
 617                 struct xfs_flock64      bf;
 618
 619                 if (xfs_compat_flock64_copyin(&bf, arg))
 620                         return -EFAULT;
 621                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 622                 return xfs_ioc_space(filp, cmd, &bf);
 623         }
 624         case XFS_IOC_FSGEOMETRY_V1_32:
 625                 return xfs_compat_ioc_fsgeometry_v1(mp, arg);
 626         case XFS_IOC_FSGROWFSDATA_32: {
 627                 struct xfs_growfs_data  in;
 628
 629                 if (xfs_compat_growfs_data_copyin(&in, arg))
 630                         return -EFAULT;
 631                 error = mnt_want_write_file(filp);
 632                 if (error)
 633                         return error;
 634                 error = xfs_growfs_data(mp, &in);
 635                 mnt_drop_write_file(filp);
 636                 return error;
 637         }
 638         case XFS_IOC_FSGROWFSRT_32: {
 639                 struct xfs_growfs_rt    in;
 640
 641                 if (xfs_compat_growfs_rt_copyin(&in, arg))
 642                         return -EFAULT;
 643                 error = mnt_want_write_file(filp);
 644                 if (error)
 645                         return error;
 646                 error = xfs_growfs_rt(mp, &in);
 647                 mnt_drop_write_file(filp);
 648                 return error;
 649         }
 650 #endif
 651         /* long changes size, but xfs only copiese out 32 bits */
 652         case XFS_IOC_GETXFLAGS_32:
 653         case XFS_IOC_SETXFLAGS_32:
 654         case XFS_IOC_GETVERSION_32:
 655                 cmd = _NATIVE_IOC(cmd, long);
 656                 return xfs_file_ioctl(filp, cmd, p);
 657         case XFS_IOC_SWAPEXT_32: {
 658                 struct xfs_swapext        sxp;
 659                 struct compat_xfs_swapext __user *sxu = arg;
 660
 661                 /* Bulk copy in up to the sx_stat field, then copy bstat */
 662                 if (copy_from_user(&sxp, sxu,
 663                                    offsetof(struct xfs_swapext, sx_stat)) ||
 664                     xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
 665                         return -EFAULT;
 666                 error = mnt_want_write_file(filp);
 667                 if (error)
 668                         return error;
 669                 error = xfs_ioc_swapext(&sxp);
 670                 mnt_drop_write_file(filp);
 671                 return error;
 672         }
 673         case XFS_IOC_FSBULKSTAT_32:
 674         case XFS_IOC_FSBULKSTAT_SINGLE_32:
 675         case XFS_IOC_FSINUMBERS_32:
 676                 return xfs_compat_ioc_bulkstat(mp, cmd, arg);
 677         case XFS_IOC_FD_TO_HANDLE_32:
 678         case XFS_IOC_PATH_TO_HANDLE_32:
 679         case XFS_IOC_PATH_TO_FSHANDLE_32: {
 680                 struct xfs_fsop_handlereq       hreq;
 681
 682                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 683                         return -EFAULT;
 684                 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
 685                 return xfs_find_handle(cmd, &hreq);
 686         }
 687         case XFS_IOC_OPEN_BY_HANDLE_32: {
 688                 struct xfs_fsop_handlereq       hreq;
 689
 690                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 691                         return -EFAULT;
 692                 return xfs_open_by_handle(filp, &hreq);
 693         }
 694         case XFS_IOC_READLINK_BY_HANDLE_32: {
 695                 struct xfs_fsop_handlereq       hreq;
 696
 697                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 698                         return -EFAULT;
 699                 return xfs_readlink_by_handle(filp, &hreq);
 700         }
 701         case XFS_IOC_ATTRLIST_BY_HANDLE_32:
 702                 return xfs_compat_attrlist_by_handle(filp, arg);
 703         case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
 704                 return xfs_compat_attrmulti_by_handle(filp, arg);
 705         case XFS_IOC_FSSETDM_BY_HANDLE_32:
 706                 return xfs_compat_fssetdm_by_handle(filp, arg);
 707         default:
 708                 return -ENOIOCTLCMD;
 709         }
 710 }