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 <asm/uaccess.h>
  23 #include "xfs.h"
  24 #include "xfs_fs.h"
  25 #include "xfs_format.h"
  26 #include "xfs_log_format.h"
  27 #include "xfs_trans_resv.h"
  28 #include "xfs_mount.h"
  29 #include "xfs_inode.h"
  30 #include "xfs_itable.h"
  31 #include "xfs_error.h"
  32 #include "xfs_fsops.h"
  33 #include "xfs_alloc.h"
  34 #include "xfs_rtalloc.h"
  35 #include "xfs_attr.h"
  36 #include "xfs_ioctl.h"
  37 #include "xfs_ioctl32.h"
  38 #include "xfs_trace.h"
  39
  40 #define  _NATIVE_IOC(cmd, type) \
  41           _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
  42
  43 #ifdef BROKEN_X86_ALIGNMENT
  44 STATIC int
  45 xfs_compat_flock64_copyin(
  46         xfs_flock64_t           *bf,
  47         compat_xfs_flock64_t    __user *arg32)
  48 {
  49         if (get_user(bf->l_type,        &arg32->l_type) ||
  50             get_user(bf->l_whence,      &arg32->l_whence) ||
  51             get_user(bf->l_start,       &arg32->l_start) ||
  52             get_user(bf->l_len,         &arg32->l_len) ||
  53             get_user(bf->l_sysid,       &arg32->l_sysid) ||
  54             get_user(bf->l_pid,         &arg32->l_pid) ||
  55             copy_from_user(bf->l_pad,   &arg32->l_pad,  4*sizeof(u32)))
  56                 return -EFAULT;
  57         return 0;
  58 }
  59
  60 STATIC int
  61 xfs_compat_ioc_fsgeometry_v1(
  62         struct xfs_mount          *mp,
  63         compat_xfs_fsop_geom_v1_t __user *arg32)
  64 {
  65         xfs_fsop_geom_t           fsgeo;
  66         int                       error;
  67
  68         error = xfs_fs_geometry(mp, &fsgeo, 3);
  69         if (error)
  70                 return error;
  71         /* The 32-bit variant simply has some padding at the end */
  72         if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
  73                 return -EFAULT;
  74         return 0;
  75 }
  76
  77 STATIC int
  78 xfs_compat_growfs_data_copyin(
  79         struct xfs_growfs_data   *in,
  80         compat_xfs_growfs_data_t __user *arg32)
  81 {
  82         if (get_user(in->newblocks, &arg32->newblocks) ||
  83             get_user(in->imaxpct,   &arg32->imaxpct))
  84                 return -EFAULT;
  85         return 0;
  86 }
  87
  88 STATIC int
  89 xfs_compat_growfs_rt_copyin(
  90         struct xfs_growfs_rt     *in,
  91         compat_xfs_growfs_rt_t  __user *arg32)
  92 {
  93         if (get_user(in->newblocks, &arg32->newblocks) ||
  94             get_user(in->extsize,   &arg32->extsize))
  95                 return -EFAULT;
  96         return 0;
  97 }
  98
  99 STATIC int
 100 xfs_inumbers_fmt_compat(
 101         void                    __user *ubuffer,
 102         const struct xfs_inogrp *buffer,
 103         long                    count,
 104         long                    *written)
 105 {
 106         compat_xfs_inogrp_t     __user *p32 = ubuffer;
 107         long                    i;
 108
 109         for (i = 0; i < count; i++) {
 110                 if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
 111                     put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
 112                     put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
 113                         return -EFAULT;
 114         }
 115         *written = count * sizeof(*p32);
 116         return 0;
 117 }
 118
 119 #else
 120 #define xfs_inumbers_fmt_compat xfs_inumbers_fmt
 121 #endif  /* BROKEN_X86_ALIGNMENT */
 122
 123 STATIC int
 124 xfs_ioctl32_bstime_copyin(
 125         xfs_bstime_t            *bstime,
 126         compat_xfs_bstime_t     __user *bstime32)
 127 {
 128         compat_time_t           sec32;  /* tv_sec differs on 64 vs. 32 */
 129
 130         if (get_user(sec32,             &bstime32->tv_sec)      ||
 131             get_user(bstime->tv_nsec,   &bstime32->tv_nsec))
 132                 return -EFAULT;
 133         bstime->tv_sec = sec32;
 134         return 0;
 135 }
 136
 137 /* xfs_bstat_t has differing alignment on intel, & bstime_t sizes everywhere */
 138 STATIC int
 139 xfs_ioctl32_bstat_copyin(
 140         xfs_bstat_t             *bstat,
 141         compat_xfs_bstat_t      __user *bstat32)
 142 {
 143         if (get_user(bstat->bs_ino,     &bstat32->bs_ino)       ||
 144             get_user(bstat->bs_mode,    &bstat32->bs_mode)      ||
 145             get_user(bstat->bs_nlink,   &bstat32->bs_nlink)     ||
 146             get_user(bstat->bs_uid,     &bstat32->bs_uid)       ||
 147             get_user(bstat->bs_gid,     &bstat32->bs_gid)       ||
 148             get_user(bstat->bs_rdev,    &bstat32->bs_rdev)      ||
 149             get_user(bstat->bs_blksize, &bstat32->bs_blksize)   ||
 150             get_user(bstat->bs_size,    &bstat32->bs_size)      ||
 151             xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) ||
 152             xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) ||
 153             xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) ||
 154             get_user(bstat->bs_blocks,  &bstat32->bs_size)      ||
 155             get_user(bstat->bs_xflags,  &bstat32->bs_size)      ||
 156             get_user(bstat->bs_extsize, &bstat32->bs_extsize)   ||
 157             get_user(bstat->bs_extents, &bstat32->bs_extents)   ||
 158             get_user(bstat->bs_gen,     &bstat32->bs_gen)       ||
 159             get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) ||
 160             get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) ||
 161             get_user(bstat->bs_forkoff, &bstat32->bs_forkoff)   ||
 162             get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) ||
 163             get_user(bstat->bs_dmstate, &bstat32->bs_dmstate)   ||
 164             get_user(bstat->bs_aextents, &bstat32->bs_aextents))
 165                 return -EFAULT;
 166         return 0;
 167 }
 168
 169 /* XFS_IOC_FSBULKSTAT and friends */
 170
 171 STATIC int
 172 xfs_bstime_store_compat(
 173         compat_xfs_bstime_t     __user *p32,
 174         const xfs_bstime_t      *p)
 175 {
 176         __s32                   sec32;
 177
 178         sec32 = p->tv_sec;
 179         if (put_user(sec32, &p32->tv_sec) ||
 180             put_user(p->tv_nsec, &p32->tv_nsec))
 181                 return -EFAULT;
 182         return 0;
 183 }
 184
 185 /* Return 0 on success or positive error (to xfs_bulkstat()) */
 186 STATIC int
 187 xfs_bulkstat_one_fmt_compat(
 188         void                    __user *ubuffer,
 189         int                     ubsize,
 190         int                     *ubused,
 191         const xfs_bstat_t       *buffer)
 192 {
 193         compat_xfs_bstat_t      __user *p32 = ubuffer;
 194
 195         if (ubsize < sizeof(*p32))
 196                 return -ENOMEM;
 197
 198         if (put_user(buffer->bs_ino,      &p32->bs_ino)         ||
 199             put_user(buffer->bs_mode,     &p32->bs_mode)        ||
 200             put_user(buffer->bs_nlink,    &p32->bs_nlink)       ||
 201             put_user(buffer->bs_uid,      &p32->bs_uid)         ||
 202             put_user(buffer->bs_gid,      &p32->bs_gid)         ||
 203             put_user(buffer->bs_rdev,     &p32->bs_rdev)        ||
 204             put_user(buffer->bs_blksize,  &p32->bs_blksize)     ||
 205             put_user(buffer->bs_size,     &p32->bs_size)        ||
 206             xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
 207             xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
 208             xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
 209             put_user(buffer->bs_blocks,   &p32->bs_blocks)      ||
 210             put_user(buffer->bs_xflags,   &p32->bs_xflags)      ||
 211             put_user(buffer->bs_extsize,  &p32->bs_extsize)     ||
 212             put_user(buffer->bs_extents,  &p32->bs_extents)     ||
 213             put_user(buffer->bs_gen,      &p32->bs_gen)         ||
 214             put_user(buffer->bs_projid,   &p32->bs_projid)      ||
 215             put_user(buffer->bs_projid_hi,      &p32->bs_projid_hi)     ||
 216             put_user(buffer->bs_forkoff,  &p32->bs_forkoff)     ||
 217             put_user(buffer->bs_dmevmask, &p32->bs_dmevmask)    ||
 218             put_user(buffer->bs_dmstate,  &p32->bs_dmstate)     ||
 219             put_user(buffer->bs_aextents, &p32->bs_aextents))
 220                 return -EFAULT;
 221         if (ubused)
 222                 *ubused = sizeof(*p32);
 223         return 0;
 224 }
 225
 226 STATIC int
 227 xfs_bulkstat_one_compat(
 228         xfs_mount_t     *mp,            /* mount point for filesystem */
 229         xfs_ino_t       ino,            /* inode number to get data for */
 230         void            __user *buffer, /* buffer to place output in */
 231         int             ubsize,         /* size of buffer */
 232         int             *ubused,        /* bytes used by me */
 233         int             *stat)          /* BULKSTAT_RV_... */
 234 {
 235         return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
 236                                     xfs_bulkstat_one_fmt_compat,
 237                                     ubused, stat);
 238 }
 239
 240 /* copied from xfs_ioctl.c */
 241 STATIC int
 242 xfs_compat_ioc_bulkstat(
 243         xfs_mount_t               *mp,
 244         unsigned int              cmd,
 245         compat_xfs_fsop_bulkreq_t __user *p32)
 246 {
 247         u32                     addr;
 248         xfs_fsop_bulkreq_t      bulkreq;
 249         int                     count;  /* # of records returned */
 250         xfs_ino_t               inlast; /* last inode number */
 251         int                     done;
 252         int                     error;
 253
 254         /*
 255          * Output structure handling functions.  Depending on the command,
 256          * either the xfs_bstat and xfs_inogrp structures are written out
 257          * to userpace memory via bulkreq.ubuffer.  Normally the compat
 258          * functions and structure size are the correct ones to use ...
 259          */
 260         inumbers_fmt_pf inumbers_func = xfs_inumbers_fmt_compat;
 261         bulkstat_one_pf bs_one_func = xfs_bulkstat_one_compat;
 262         size_t bs_one_size = sizeof(struct compat_xfs_bstat);
 263
 264 #ifdef CONFIG_X86_X32
 265         if (in_x32_syscall()) {
 266                 /*
 267                  * ... but on x32 the input xfs_fsop_bulkreq has pointers
 268                  * which must be handled in the "compat" (32-bit) way, while
 269                  * the xfs_bstat and xfs_inogrp structures follow native 64-
 270                  * bit layout convention.  So adjust accordingly, otherwise
 271                  * the data written out in compat layout will not match what
 272                  * x32 userspace expects.
 273                  */
 274                 inumbers_func = xfs_inumbers_fmt;
 275                 bs_one_func = xfs_bulkstat_one;
 276                 bs_one_size = sizeof(struct xfs_bstat);
 277         }
 278 #endif
 279
 280         /* done = 1 if there are more stats to get and if bulkstat */
 281         /* should be called again (unused here, but used in dmapi) */
 282
 283         if (!capable(CAP_SYS_ADMIN))
 284                 return -EPERM;
 285
 286         if (XFS_FORCED_SHUTDOWN(mp))
 287                 return -EIO;
 288
 289         if (get_user(addr, &p32->lastip))
 290                 return -EFAULT;
 291         bulkreq.lastip = compat_ptr(addr);
 292         if (get_user(bulkreq.icount, &p32->icount) ||
 293             get_user(addr, &p32->ubuffer))
 294                 return -EFAULT;
 295         bulkreq.ubuffer = compat_ptr(addr);
 296         if (get_user(addr, &p32->ocount))
 297                 return -EFAULT;
 298         bulkreq.ocount = compat_ptr(addr);
 299
 300         if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
 301                 return -EFAULT;
 302
 303         if ((count = bulkreq.icount) <= 0)
 304                 return -EINVAL;
 305
 306         if (bulkreq.ubuffer == NULL)
 307                 return -EINVAL;
 308
 309         if (cmd == XFS_IOC_FSINUMBERS_32) {
 310                 error = xfs_inumbers(mp, &inlast, &count,
 311                                 bulkreq.ubuffer, inumbers_func);
 312         } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
 313                 int res;
 314
 315                 error = bs_one_func(mp, inlast, bulkreq.ubuffer,
 316                                 bs_one_size, NULL, &res);
 317         } else if (cmd == XFS_IOC_FSBULKSTAT_32) {
 318                 error = xfs_bulkstat(mp, &inlast, &count,
 319                         bs_one_func, bs_one_size,
 320                         bulkreq.ubuffer, &done);
 321         } else
 322                 error = -EINVAL;
 323         if (error)
 324                 return error;
 325
 326         if (bulkreq.ocount != NULL) {
 327                 if (copy_to_user(bulkreq.lastip, &inlast,
 328                                                 sizeof(xfs_ino_t)))
 329                         return -EFAULT;
 330
 331                 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
 332                         return -EFAULT;
 333         }
 334
 335         return 0;
 336 }
 337
 338 STATIC int
 339 xfs_compat_handlereq_copyin(
 340         xfs_fsop_handlereq_t            *hreq,
 341         compat_xfs_fsop_handlereq_t     __user *arg32)
 342 {
 343         compat_xfs_fsop_handlereq_t     hreq32;
 344
 345         if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
 346                 return -EFAULT;
 347
 348         hreq->fd = hreq32.fd;
 349         hreq->path = compat_ptr(hreq32.path);
 350         hreq->oflags = hreq32.oflags;
 351         hreq->ihandle = compat_ptr(hreq32.ihandle);
 352         hreq->ihandlen = hreq32.ihandlen;
 353         hreq->ohandle = compat_ptr(hreq32.ohandle);
 354         hreq->ohandlen = compat_ptr(hreq32.ohandlen);
 355
 356         return 0;
 357 }
 358
 359 STATIC struct dentry *
 360 xfs_compat_handlereq_to_dentry(
 361         struct file             *parfilp,
 362         compat_xfs_fsop_handlereq_t *hreq)
 363 {
 364         return xfs_handle_to_dentry(parfilp,
 365                         compat_ptr(hreq->ihandle), hreq->ihandlen);
 366 }
 367
 368 STATIC int
 369 xfs_compat_attrlist_by_handle(
 370         struct file             *parfilp,
 371         void                    __user *arg)
 372 {
 373         int                     error;
 374         attrlist_cursor_kern_t  *cursor;
 375         compat_xfs_fsop_attrlist_handlereq_t __user *p = arg;
 376         compat_xfs_fsop_attrlist_handlereq_t al_hreq;
 377         struct dentry           *dentry;
 378         char                    *kbuf;
 379
 380         if (!capable(CAP_SYS_ADMIN))
 381                 return -EPERM;
 382         if (copy_from_user(&al_hreq, arg,
 383                            sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
 384                 return -EFAULT;
 385         if (al_hreq.buflen < sizeof(struct attrlist) ||
 386             al_hreq.buflen > XFS_XATTR_LIST_MAX)
 387                 return -EINVAL;
 388
 389         /*
 390          * Reject flags, only allow namespaces.
 391          */
 392         if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
 393                 return -EINVAL;
 394
 395         dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
 396         if (IS_ERR(dentry))
 397                 return PTR_ERR(dentry);
 398
 399         error = -ENOMEM;
 400         kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
 401         if (!kbuf)
 402                 goto out_dput;
 403
 404         cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
 405         error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
 406                                         al_hreq.flags, cursor);
 407         if (error)
 408                 goto out_kfree;
 409
 410         if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
 411                 error = -EFAULT;
 412                 goto out_kfree;
 413         }
 414
 415         if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
 416                 error = -EFAULT;
 417
 418 out_kfree:
 419         kmem_free(kbuf);
 420 out_dput:
 421         dput(dentry);
 422         return error;
 423 }
 424
 425 STATIC int
 426 xfs_compat_attrmulti_by_handle(
 427         struct file                             *parfilp,
 428         void                                    __user *arg)
 429 {
 430         int                                     error;
 431         compat_xfs_attr_multiop_t               *ops;
 432         compat_xfs_fsop_attrmulti_handlereq_t   am_hreq;
 433         struct dentry                           *dentry;
 434         unsigned int                            i, size;
 435         unsigned char                           *attr_name;
 436
 437         if (!capable(CAP_SYS_ADMIN))
 438                 return -EPERM;
 439         if (copy_from_user(&am_hreq, arg,
 440                            sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
 441                 return -EFAULT;
 442
 443         /* overflow check */
 444         if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
 445                 return -E2BIG;
 446
 447         dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
 448         if (IS_ERR(dentry))
 449                 return PTR_ERR(dentry);
 450
 451         error = -E2BIG;
 452         size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
 453         if (!size || size > 16 * PAGE_SIZE)
 454                 goto out_dput;
 455
 456         ops = memdup_user(compat_ptr(am_hreq.ops), size);
 457         if (IS_ERR(ops)) {
 458                 error = PTR_ERR(ops);
 459                 goto out_dput;
 460         }
 461
 462         error = -ENOMEM;
 463         attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
 464         if (!attr_name)
 465                 goto out_kfree_ops;
 466
 467         error = 0;
 468         for (i = 0; i < am_hreq.opcount; i++) {
 469                 ops[i].am_error = strncpy_from_user((char *)attr_name,
 470                                 compat_ptr(ops[i].am_attrname),
 471                                 MAXNAMELEN);
 472                 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
 473                         error = -ERANGE;
 474                 if (ops[i].am_error < 0)
 475                         break;
 476
 477                 switch (ops[i].am_opcode) {
 478                 case ATTR_OP_GET:
 479                         ops[i].am_error = xfs_attrmulti_attr_get(
 480                                         d_inode(dentry), attr_name,
 481                                         compat_ptr(ops[i].am_attrvalue),
 482                                         &ops[i].am_length, ops[i].am_flags);
 483                         break;
 484                 case ATTR_OP_SET:
 485                         ops[i].am_error = mnt_want_write_file(parfilp);
 486                         if (ops[i].am_error)
 487                                 break;
 488                         ops[i].am_error = xfs_attrmulti_attr_set(
 489                                         d_inode(dentry), attr_name,
 490                                         compat_ptr(ops[i].am_attrvalue),
 491                                         ops[i].am_length, ops[i].am_flags);
 492                         mnt_drop_write_file(parfilp);
 493                         break;
 494                 case ATTR_OP_REMOVE:
 495                         ops[i].am_error = mnt_want_write_file(parfilp);
 496                         if (ops[i].am_error)
 497                                 break;
 498                         ops[i].am_error = xfs_attrmulti_attr_remove(
 499                                         d_inode(dentry), attr_name,
 500                                         ops[i].am_flags);
 501                         mnt_drop_write_file(parfilp);
 502                         break;
 503                 default:
 504                         ops[i].am_error = -EINVAL;
 505                 }
 506         }
 507
 508         if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
 509                 error = -EFAULT;
 510
 511         kfree(attr_name);
 512  out_kfree_ops:
 513         kfree(ops);
 514  out_dput:
 515         dput(dentry);
 516         return error;
 517 }
 518
 519 STATIC int
 520 xfs_compat_fssetdm_by_handle(
 521         struct file             *parfilp,
 522         void                    __user *arg)
 523 {
 524         int                     error;
 525         struct fsdmidata        fsd;
 526         compat_xfs_fsop_setdm_handlereq_t dmhreq;
 527         struct dentry           *dentry;
 528
 529         if (!capable(CAP_MKNOD))
 530                 return -EPERM;
 531         if (copy_from_user(&dmhreq, arg,
 532                            sizeof(compat_xfs_fsop_setdm_handlereq_t)))
 533                 return -EFAULT;
 534
 535         dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
 536         if (IS_ERR(dentry))
 537                 return PTR_ERR(dentry);
 538
 539         if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
 540                 error = -EPERM;
 541                 goto out;
 542         }
 543
 544         if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
 545                 error = -EFAULT;
 546                 goto out;
 547         }
 548
 549         error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
 550                                  fsd.fsd_dmstate);
 551
 552 out:
 553         dput(dentry);
 554         return error;
 555 }
 556
 557 long
 558 xfs_file_compat_ioctl(
 559         struct file             *filp,
 560         unsigned                cmd,
 561         unsigned long           p)
 562 {
 563         struct inode            *inode = file_inode(filp);
 564         struct xfs_inode        *ip = XFS_I(inode);
 565         struct xfs_mount        *mp = ip->i_mount;
 566         void                    __user *arg = (void __user *)p;
 567         int                     error;
 568
 569         trace_xfs_file_compat_ioctl(ip);
 570
 571         switch (cmd) {
 572         /* No size or alignment issues on any arch */
 573         case XFS_IOC_DIOINFO:
 574         case XFS_IOC_FSGEOMETRY:
 575         case XFS_IOC_FSGETXATTR:
 576         case XFS_IOC_FSSETXATTR:
 577         case XFS_IOC_FSGETXATTRA:
 578         case XFS_IOC_FSSETDM:
 579         case XFS_IOC_GETBMAP:
 580         case XFS_IOC_GETBMAPA:
 581         case XFS_IOC_GETBMAPX:
 582         case XFS_IOC_FSCOUNTS:
 583         case XFS_IOC_SET_RESBLKS:
 584         case XFS_IOC_GET_RESBLKS:
 585         case XFS_IOC_FSGROWFSLOG:
 586         case XFS_IOC_GOINGDOWN:
 587         case XFS_IOC_ERROR_INJECTION:
 588         case XFS_IOC_ERROR_CLEARALL:
 589                 return xfs_file_ioctl(filp, cmd, p);
 590 #ifndef BROKEN_X86_ALIGNMENT
 591         /* These are handled fine if no alignment issues */
 592         case XFS_IOC_ALLOCSP:
 593         case XFS_IOC_FREESP:
 594         case XFS_IOC_RESVSP:
 595         case XFS_IOC_UNRESVSP:
 596         case XFS_IOC_ALLOCSP64:
 597         case XFS_IOC_FREESP64:
 598         case XFS_IOC_RESVSP64:
 599         case XFS_IOC_UNRESVSP64:
 600         case XFS_IOC_FSGEOMETRY_V1:
 601         case XFS_IOC_FSGROWFSDATA:
 602         case XFS_IOC_FSGROWFSRT:
 603         case XFS_IOC_ZERO_RANGE:
 604                 return xfs_file_ioctl(filp, cmd, p);
 605 #else
 606         case XFS_IOC_ALLOCSP_32:
 607         case XFS_IOC_FREESP_32:
 608         case XFS_IOC_ALLOCSP64_32:
 609         case XFS_IOC_FREESP64_32:
 610         case XFS_IOC_RESVSP_32:
 611         case XFS_IOC_UNRESVSP_32:
 612         case XFS_IOC_RESVSP64_32:
 613         case XFS_IOC_UNRESVSP64_32:
 614         case XFS_IOC_ZERO_RANGE_32: {
 615                 struct xfs_flock64      bf;
 616
 617                 if (xfs_compat_flock64_copyin(&bf, arg))
 618                         return -EFAULT;
 619                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 620                 return xfs_ioc_space(filp, cmd, &bf);
 621         }
 622         case XFS_IOC_FSGEOMETRY_V1_32:
 623                 return xfs_compat_ioc_fsgeometry_v1(mp, arg);
 624         case XFS_IOC_FSGROWFSDATA_32: {
 625                 struct xfs_growfs_data  in;
 626
 627                 if (xfs_compat_growfs_data_copyin(&in, arg))
 628                         return -EFAULT;
 629                 error = mnt_want_write_file(filp);
 630                 if (error)
 631                         return error;
 632                 error = xfs_growfs_data(mp, &in);
 633                 mnt_drop_write_file(filp);
 634                 return error;
 635         }
 636         case XFS_IOC_FSGROWFSRT_32: {
 637                 struct xfs_growfs_rt    in;
 638
 639                 if (xfs_compat_growfs_rt_copyin(&in, arg))
 640                         return -EFAULT;
 641                 error = mnt_want_write_file(filp);
 642                 if (error)
 643                         return error;
 644                 error = xfs_growfs_rt(mp, &in);
 645                 mnt_drop_write_file(filp);
 646                 return error;
 647         }
 648 #endif
 649         /* long changes size, but xfs only copiese out 32 bits */
 650         case XFS_IOC_GETXFLAGS_32:
 651         case XFS_IOC_SETXFLAGS_32:
 652         case XFS_IOC_GETVERSION_32:
 653                 cmd = _NATIVE_IOC(cmd, long);
 654                 return xfs_file_ioctl(filp, cmd, p);
 655         case XFS_IOC_SWAPEXT_32: {
 656                 struct xfs_swapext        sxp;
 657                 struct compat_xfs_swapext __user *sxu = arg;
 658
 659                 /* Bulk copy in up to the sx_stat field, then copy bstat */
 660                 if (copy_from_user(&sxp, sxu,
 661                                    offsetof(struct xfs_swapext, sx_stat)) ||
 662                     xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
 663                         return -EFAULT;
 664                 error = mnt_want_write_file(filp);
 665                 if (error)
 666                         return error;
 667                 error = xfs_ioc_swapext(&sxp);
 668                 mnt_drop_write_file(filp);
 669                 return error;
 670         }
 671         case XFS_IOC_FSBULKSTAT_32:
 672         case XFS_IOC_FSBULKSTAT_SINGLE_32:
 673         case XFS_IOC_FSINUMBERS_32:
 674                 return xfs_compat_ioc_bulkstat(mp, cmd, arg);
 675         case XFS_IOC_FD_TO_HANDLE_32:
 676         case XFS_IOC_PATH_TO_HANDLE_32:
 677         case XFS_IOC_PATH_TO_FSHANDLE_32: {
 678                 struct xfs_fsop_handlereq       hreq;
 679
 680                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 681                         return -EFAULT;
 682                 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
 683                 return xfs_find_handle(cmd, &hreq);
 684         }
 685         case XFS_IOC_OPEN_BY_HANDLE_32: {
 686                 struct xfs_fsop_handlereq       hreq;
 687
 688                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 689                         return -EFAULT;
 690                 return xfs_open_by_handle(filp, &hreq);
 691         }
 692         case XFS_IOC_READLINK_BY_HANDLE_32: {
 693                 struct xfs_fsop_handlereq       hreq;
 694
 695                 if (xfs_compat_handlereq_copyin(&hreq, arg))
 696                         return -EFAULT;
 697                 return xfs_readlink_by_handle(filp, &hreq);
 698         }
 699         case XFS_IOC_ATTRLIST_BY_HANDLE_32:
 700                 return xfs_compat_attrlist_by_handle(filp, arg);
 701         case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
 702                 return xfs_compat_attrmulti_by_handle(filp, arg);
 703         case XFS_IOC_FSSETDM_BY_HANDLE_32:
 704                 return xfs_compat_fssetdm_by_handle(filp, arg);
 705         default:
 706                 return -ENOIOCTLCMD;
 707         }
 708 }