fs/xfs/linux-2.6/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/init.h>
  20 #include <linux/ioctl.h>
  21 #include <linux/syscalls.h>
  22 #include <linux/types.h>
  23 #include <linux/fs.h>
  24 #include <asm/uaccess.h>
  25 #include "xfs.h"
  26 #include "xfs_fs.h"
  27 #include "xfs_bit.h"
  28 #include "xfs_log.h"
  29 #include "xfs_inum.h"
  30 #include "xfs_trans.h"
  31 #include "xfs_sb.h"
  32 #include "xfs_ag.h"
  33 #include "xfs_dir2.h"
  34 #include "xfs_dmapi.h"
  35 #include "xfs_mount.h"
  36 #include "xfs_bmap_btree.h"
  37 #include "xfs_attr_sf.h"
  38 #include "xfs_dir2_sf.h"
  39 #include "xfs_vfs.h"
  40 #include "xfs_vnode.h"
  41 #include "xfs_dinode.h"
  42 #include "xfs_inode.h"
  43 #include "xfs_itable.h"
  44 #include "xfs_error.h"
  45 #include "xfs_dfrag.h"
  46 #include "xfs_vnodeops.h"
  47 #include "xfs_ioctl32.h"
  48
  49 #define  _NATIVE_IOC(cmd, type) \
  50           _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
  51
  52 #if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
  53 #define BROKEN_X86_ALIGNMENT
  54 #define _PACKED __attribute__((packed))
  55 /* on ia32 l_start is on a 32-bit boundary */
  56 typedef struct xfs_flock64_32 {
  57         __s16           l_type;
  58         __s16           l_whence;
  59         __s64           l_start __attribute__((packed));
  60                         /* len == 0 means until end of file */
  61         __s64           l_len __attribute__((packed));
  62         __s32           l_sysid;
  63         __u32           l_pid;
  64         __s32           l_pad[4];       /* reserve area */
  65 } xfs_flock64_32_t;
  66
  67 #define XFS_IOC_ALLOCSP_32      _IOW ('X', 10, struct xfs_flock64_32)
  68 #define XFS_IOC_FREESP_32       _IOW ('X', 11, struct xfs_flock64_32)
  69 #define XFS_IOC_ALLOCSP64_32    _IOW ('X', 36, struct xfs_flock64_32)
  70 #define XFS_IOC_FREESP64_32     _IOW ('X', 37, struct xfs_flock64_32)
  71 #define XFS_IOC_RESVSP_32       _IOW ('X', 40, struct xfs_flock64_32)
  72 #define XFS_IOC_UNRESVSP_32     _IOW ('X', 41, struct xfs_flock64_32)
  73 #define XFS_IOC_RESVSP64_32     _IOW ('X', 42, struct xfs_flock64_32)
  74 #define XFS_IOC_UNRESVSP64_32   _IOW ('X', 43, struct xfs_flock64_32)
  75
  76 /* just account for different alignment */
  77 STATIC unsigned long
  78 xfs_ioctl32_flock(
  79         unsigned long           arg)
  80 {
  81         xfs_flock64_32_t        __user *p32 = (void __user *)arg;
  82         xfs_flock64_t           __user *p = compat_alloc_user_space(sizeof(*p));
  83
  84         if (copy_in_user(&p->l_type,    &p32->l_type,   sizeof(s16)) ||
  85             copy_in_user(&p->l_whence,  &p32->l_whence, sizeof(s16)) ||
  86             copy_in_user(&p->l_start,   &p32->l_start,  sizeof(s64)) ||
  87             copy_in_user(&p->l_len,     &p32->l_len,    sizeof(s64)) ||
  88             copy_in_user(&p->l_sysid,   &p32->l_sysid,  sizeof(s32)) ||
  89             copy_in_user(&p->l_pid,     &p32->l_pid,    sizeof(u32)) ||
  90             copy_in_user(&p->l_pad,     &p32->l_pad,    4*sizeof(u32)))
  91                 return -EFAULT;
  92
  93         return (unsigned long)p;
  94 }
  95
  96 typedef struct compat_xfs_fsop_geom_v1 {
  97         __u32           blocksize;      /* filesystem (data) block size */
  98         __u32           rtextsize;      /* realtime extent size         */
  99         __u32           agblocks;       /* fsblocks in an AG            */
 100         __u32           agcount;        /* number of allocation groups  */
 101         __u32           logblocks;      /* fsblocks in the log          */
 102         __u32           sectsize;       /* (data) sector size, bytes    */
 103         __u32           inodesize;      /* inode size in bytes          */
 104         __u32           imaxpct;        /* max allowed inode space(%)   */
 105         __u64           datablocks;     /* fsblocks in data subvolume   */
 106         __u64           rtblocks;       /* fsblocks in realtime subvol  */
 107         __u64           rtextents;      /* rt extents in realtime subvol*/
 108         __u64           logstart;       /* starting fsblock of the log  */
 109         unsigned char   uuid[16];       /* unique id of the filesystem  */
 110         __u32           sunit;          /* stripe unit, fsblocks        */
 111         __u32           swidth;         /* stripe width, fsblocks       */
 112         __s32           version;        /* structure version            */
 113         __u32           flags;          /* superblock version flags     */
 114         __u32           logsectsize;    /* log sector size, bytes       */
 115         __u32           rtsectsize;     /* realtime sector size, bytes  */
 116         __u32           dirblocksize;   /* directory block size, bytes  */
 117 } __attribute__((packed)) compat_xfs_fsop_geom_v1_t;
 118
 119 #define XFS_IOC_FSGEOMETRY_V1_32  \
 120         _IOR ('X', 100, struct compat_xfs_fsop_geom_v1)
 121
 122 STATIC unsigned long xfs_ioctl32_geom_v1(unsigned long arg)
 123 {
 124         compat_xfs_fsop_geom_v1_t __user *p32 = (void __user *)arg;
 125         xfs_fsop_geom_v1_t __user *p = compat_alloc_user_space(sizeof(*p));
 126
 127         if (copy_in_user(p, p32, sizeof(*p32)))
 128                 return -EFAULT;
 129         return (unsigned long)p;
 130 }
 131
 132 typedef struct compat_xfs_inogrp {
 133         __u64           xi_startino;    /* starting inode number        */
 134         __s32           xi_alloccount;  /* # bits set in allocmask      */
 135         __u64           xi_allocmask;   /* mask of allocated inodes     */
 136 } __attribute__((packed)) compat_xfs_inogrp_t;
 137
 138 STATIC int xfs_inumbers_fmt_compat(
 139         void __user *ubuffer,
 140         const xfs_inogrp_t *buffer,
 141         long count,
 142         long *written)
 143 {
 144         compat_xfs_inogrp_t __user *p32 = ubuffer;
 145         long i;
 146
 147         for (i = 0; i < count; i++) {
 148                 if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
 149                     put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
 150                     put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
 151                         return -EFAULT;
 152         }
 153         *written = count * sizeof(*p32);
 154         return 0;
 155 }
 156
 157 #else
 158
 159 #define xfs_inumbers_fmt_compat xfs_inumbers_fmt
 160 #define _PACKED
 161
 162 #endif
 163
 164 /* XFS_IOC_FSBULKSTAT and friends */
 165
 166 typedef struct compat_xfs_bstime {
 167         __s32           tv_sec;         /* seconds              */
 168         __s32           tv_nsec;        /* and nanoseconds      */
 169 } compat_xfs_bstime_t;
 170
 171 STATIC int xfs_bstime_store_compat(
 172         compat_xfs_bstime_t __user *p32,
 173         const xfs_bstime_t *p)
 174 {
 175         __s32 sec32;
 176
 177         sec32 = p->tv_sec;
 178         if (put_user(sec32, &p32->tv_sec) ||
 179             put_user(p->tv_nsec, &p32->tv_nsec))
 180                 return -EFAULT;
 181         return 0;
 182 }
 183
 184 typedef struct compat_xfs_bstat {
 185         __u64           bs_ino;         /* inode number                 */
 186         __u16           bs_mode;        /* type and mode                */
 187         __u16           bs_nlink;       /* number of links              */
 188         __u32           bs_uid;         /* user id                      */
 189         __u32           bs_gid;         /* group id                     */
 190         __u32           bs_rdev;        /* device value                 */
 191         __s32           bs_blksize;     /* block size                   */
 192         __s64           bs_size;        /* file size                    */
 193         compat_xfs_bstime_t bs_atime;   /* access time                  */
 194         compat_xfs_bstime_t bs_mtime;   /* modify time                  */
 195         compat_xfs_bstime_t bs_ctime;   /* inode change time            */
 196         int64_t         bs_blocks;      /* number of blocks             */
 197         __u32           bs_xflags;      /* extended flags               */
 198         __s32           bs_extsize;     /* extent size                  */
 199         __s32           bs_extents;     /* number of extents            */
 200         __u32           bs_gen;         /* generation count             */
 201         __u16           bs_projid;      /* project id                   */
 202         unsigned char   bs_pad[14];     /* pad space, unused            */
 203         __u32           bs_dmevmask;    /* DMIG event mask              */
 204         __u16           bs_dmstate;     /* DMIG state info              */
 205         __u16           bs_aextents;    /* attribute number of extents  */
 206 } _PACKED compat_xfs_bstat_t;
 207
 208 STATIC int xfs_bulkstat_one_fmt_compat(
 209         void                    __user *ubuffer,
 210         const xfs_bstat_t       *buffer)
 211 {
 212         compat_xfs_bstat_t __user *p32 = ubuffer;
 213
 214         if (put_user(buffer->bs_ino, &p32->bs_ino) ||
 215             put_user(buffer->bs_mode, &p32->bs_mode) ||
 216             put_user(buffer->bs_nlink, &p32->bs_nlink) ||
 217             put_user(buffer->bs_uid, &p32->bs_uid) ||
 218             put_user(buffer->bs_gid, &p32->bs_gid) ||
 219             put_user(buffer->bs_rdev, &p32->bs_rdev) ||
 220             put_user(buffer->bs_blksize, &p32->bs_blksize) ||
 221             put_user(buffer->bs_size, &p32->bs_size) ||
 222             xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
 223             xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
 224             xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
 225             put_user(buffer->bs_blocks, &p32->bs_blocks) ||
 226             put_user(buffer->bs_xflags, &p32->bs_xflags) ||
 227             put_user(buffer->bs_extsize, &p32->bs_extsize) ||
 228             put_user(buffer->bs_extents, &p32->bs_extents) ||
 229             put_user(buffer->bs_gen, &p32->bs_gen) ||
 230             put_user(buffer->bs_projid, &p32->bs_projid) ||
 231             put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
 232             put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
 233             put_user(buffer->bs_aextents, &p32->bs_aextents))
 234                 return -EFAULT;
 235         return sizeof(*p32);
 236 }
 237
 238
 239
 240 typedef struct compat_xfs_fsop_bulkreq {
 241         compat_uptr_t   lastip;         /* last inode # pointer         */
 242         __s32           icount;         /* count of entries in buffer   */
 243         compat_uptr_t   ubuffer;        /* user buffer for inode desc.  */
 244         compat_uptr_t   ocount;         /* output count pointer         */
 245 } compat_xfs_fsop_bulkreq_t;
 246
 247 #define XFS_IOC_FSBULKSTAT_32 \
 248         _IOWR('X', 101, struct compat_xfs_fsop_bulkreq)
 249 #define XFS_IOC_FSBULKSTAT_SINGLE_32 \
 250         _IOWR('X', 102, struct compat_xfs_fsop_bulkreq)
 251 #define XFS_IOC_FSINUMBERS_32 \
 252         _IOWR('X', 103, struct compat_xfs_fsop_bulkreq)
 253
 254 /* copied from xfs_ioctl.c */
 255 STATIC int
 256 xfs_ioc_bulkstat_compat(
 257         xfs_mount_t             *mp,
 258         unsigned int            cmd,
 259         void                    __user *arg)
 260 {
 261         compat_xfs_fsop_bulkreq_t __user *p32 = (void __user *)arg;
 262         u32                     addr;
 263         xfs_fsop_bulkreq_t      bulkreq;
 264         int                     count;  /* # of records returned */
 265         xfs_ino_t               inlast; /* last inode number */
 266         int                     done;
 267         int                     error;
 268
 269         /* done = 1 if there are more stats to get and if bulkstat */
 270         /* should be called again (unused here, but used in dmapi) */
 271
 272         if (!capable(CAP_SYS_ADMIN))
 273                 return -EPERM;
 274
 275         if (XFS_FORCED_SHUTDOWN(mp))
 276                 return -XFS_ERROR(EIO);
 277
 278         if (get_user(addr, &p32->lastip))
 279                 return -EFAULT;
 280         bulkreq.lastip = compat_ptr(addr);
 281         if (get_user(bulkreq.icount, &p32->icount) ||
 282             get_user(addr, &p32->ubuffer))
 283                 return -EFAULT;
 284         bulkreq.ubuffer = compat_ptr(addr);
 285         if (get_user(addr, &p32->ocount))
 286                 return -EFAULT;
 287         bulkreq.ocount = compat_ptr(addr);
 288
 289         if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
 290                 return -XFS_ERROR(EFAULT);
 291
 292         if ((count = bulkreq.icount) <= 0)
 293                 return -XFS_ERROR(EINVAL);
 294
 295         if (bulkreq.ubuffer == NULL)
 296                 return -XFS_ERROR(EINVAL);
 297
 298         if (cmd == XFS_IOC_FSINUMBERS)
 299                 error = xfs_inumbers(mp, &inlast, &count,
 300                                 bulkreq.ubuffer, xfs_inumbers_fmt_compat);
 301         else {
 302                 /* declare a var to get a warning in case the type changes */
 303                 bulkstat_one_fmt_pf formatter = xfs_bulkstat_one_fmt_compat;
 304                 error = xfs_bulkstat(mp, &inlast, &count,
 305                         xfs_bulkstat_one, formatter,
 306                         sizeof(compat_xfs_bstat_t), bulkreq.ubuffer,
 307                         BULKSTAT_FG_QUICK, &done);
 308         }
 309         if (error)
 310                 return -error;
 311
 312         if (bulkreq.ocount != NULL) {
 313                 if (copy_to_user(bulkreq.lastip, &inlast,
 314                                                 sizeof(xfs_ino_t)))
 315                         return -XFS_ERROR(EFAULT);
 316
 317                 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
 318                         return -XFS_ERROR(EFAULT);
 319         }
 320
 321         return 0;
 322 }
 323
 324
 325
 326 typedef struct compat_xfs_fsop_handlereq {
 327         __u32           fd;             /* fd for FD_TO_HANDLE          */
 328         compat_uptr_t   path;           /* user pathname                */
 329         __u32           oflags;         /* open flags                   */
 330         compat_uptr_t   ihandle;        /* user supplied handle         */
 331         __u32           ihandlen;       /* user supplied length         */
 332         compat_uptr_t   ohandle;        /* user buffer for handle       */
 333         compat_uptr_t   ohandlen;       /* user buffer length           */
 334 } compat_xfs_fsop_handlereq_t;
 335
 336 #define XFS_IOC_PATH_TO_FSHANDLE_32 \
 337         _IOWR('X', 104, struct compat_xfs_fsop_handlereq)
 338 #define XFS_IOC_PATH_TO_HANDLE_32 \
 339         _IOWR('X', 105, struct compat_xfs_fsop_handlereq)
 340 #define XFS_IOC_FD_TO_HANDLE_32 \
 341         _IOWR('X', 106, struct compat_xfs_fsop_handlereq)
 342 #define XFS_IOC_OPEN_BY_HANDLE_32 \
 343         _IOWR('X', 107, struct compat_xfs_fsop_handlereq)
 344 #define XFS_IOC_READLINK_BY_HANDLE_32 \
 345         _IOWR('X', 108, struct compat_xfs_fsop_handlereq)
 346
 347 STATIC unsigned long xfs_ioctl32_fshandle(unsigned long arg)
 348 {
 349         compat_xfs_fsop_handlereq_t __user *p32 = (void __user *)arg;
 350         xfs_fsop_handlereq_t __user *p = compat_alloc_user_space(sizeof(*p));
 351         u32 addr;
 352
 353         if (copy_in_user(&p->fd, &p32->fd, sizeof(__u32)) ||
 354             get_user(addr, &p32->path) ||
 355             put_user(compat_ptr(addr), &p->path) ||
 356             copy_in_user(&p->oflags, &p32->oflags, sizeof(__u32)) ||
 357             get_user(addr, &p32->ihandle) ||
 358             put_user(compat_ptr(addr), &p->ihandle) ||
 359             copy_in_user(&p->ihandlen, &p32->ihandlen, sizeof(__u32)) ||
 360             get_user(addr, &p32->ohandle) ||
 361             put_user(compat_ptr(addr), &p->ohandle) ||
 362             get_user(addr, &p32->ohandlen) ||
 363             put_user(compat_ptr(addr), &p->ohandlen))
 364                 return -EFAULT;
 365
 366         return (unsigned long)p;
 367 }
 368
 369
 370 STATIC long
 371 xfs_compat_ioctl(
 372         int             mode,
 373         struct file     *file,
 374         unsigned        cmd,
 375         unsigned long   arg)
 376 {
 377         struct inode    *inode = file->f_path.dentry->d_inode;
 378         int             error;
 379
 380         switch (cmd) {
 381         case XFS_IOC_DIOINFO:
 382         case XFS_IOC_FSGEOMETRY:
 383         case XFS_IOC_FSGETXATTR:
 384         case XFS_IOC_FSSETXATTR:
 385         case XFS_IOC_FSGETXATTRA:
 386         case XFS_IOC_FSSETDM:
 387         case XFS_IOC_GETBMAP:
 388         case XFS_IOC_GETBMAPA:
 389         case XFS_IOC_GETBMAPX:
 390 /* not handled
 391         case XFS_IOC_FSSETDM_BY_HANDLE:
 392         case XFS_IOC_ATTRLIST_BY_HANDLE:
 393         case XFS_IOC_ATTRMULTI_BY_HANDLE:
 394 */
 395         case XFS_IOC_FSCOUNTS:
 396         case XFS_IOC_SET_RESBLKS:
 397         case XFS_IOC_GET_RESBLKS:
 398         case XFS_IOC_FSGROWFSDATA:
 399         case XFS_IOC_FSGROWFSLOG:
 400         case XFS_IOC_FSGROWFSRT:
 401         case XFS_IOC_FREEZE:
 402         case XFS_IOC_THAW:
 403         case XFS_IOC_GOINGDOWN:
 404         case XFS_IOC_ERROR_INJECTION:
 405         case XFS_IOC_ERROR_CLEARALL:
 406                 break;
 407
 408         case XFS_IOC32_GETXFLAGS:
 409         case XFS_IOC32_SETXFLAGS:
 410         case XFS_IOC32_GETVERSION:
 411                 cmd = _NATIVE_IOC(cmd, long);
 412                 break;
 413 #ifdef BROKEN_X86_ALIGNMENT
 414         /* xfs_flock_t has wrong u32 vs u64 alignment */
 415         case XFS_IOC_ALLOCSP_32:
 416         case XFS_IOC_FREESP_32:
 417         case XFS_IOC_ALLOCSP64_32:
 418         case XFS_IOC_FREESP64_32:
 419         case XFS_IOC_RESVSP_32:
 420         case XFS_IOC_UNRESVSP_32:
 421         case XFS_IOC_RESVSP64_32:
 422         case XFS_IOC_UNRESVSP64_32:
 423                 arg = xfs_ioctl32_flock(arg);
 424                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 425                 break;
 426         case XFS_IOC_FSGEOMETRY_V1_32:
 427                 arg = xfs_ioctl32_geom_v1(arg);
 428                 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_geom_v1);
 429                 break;
 430
 431 #else /* These are handled fine if no alignment issues */
 432         case XFS_IOC_ALLOCSP:
 433         case XFS_IOC_FREESP:
 434         case XFS_IOC_RESVSP:
 435         case XFS_IOC_UNRESVSP:
 436         case XFS_IOC_ALLOCSP64:
 437         case XFS_IOC_FREESP64:
 438         case XFS_IOC_RESVSP64:
 439         case XFS_IOC_UNRESVSP64:
 440         case XFS_IOC_FSGEOMETRY_V1:
 441                 break;
 442
 443         /* xfs_bstat_t still has wrong u32 vs u64 alignment */
 444         case XFS_IOC_SWAPEXT:
 445                 break;
 446
 447 #endif
 448         case XFS_IOC_FSBULKSTAT_32:
 449         case XFS_IOC_FSBULKSTAT_SINGLE_32:
 450         case XFS_IOC_FSINUMBERS_32:
 451                 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_bulkreq);
 452                 return xfs_ioc_bulkstat_compat(XFS_I(inode)->i_mount,
 453                                 cmd, (void __user*)arg);
 454         case XFS_IOC_FD_TO_HANDLE_32:
 455         case XFS_IOC_PATH_TO_HANDLE_32:
 456         case XFS_IOC_PATH_TO_FSHANDLE_32:
 457         case XFS_IOC_OPEN_BY_HANDLE_32:
 458         case XFS_IOC_READLINK_BY_HANDLE_32:
 459                 arg = xfs_ioctl32_fshandle(arg);
 460                 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
 461                 break;
 462         default:
 463                 return -ENOIOCTLCMD;
 464         }
 465
 466         error = xfs_ioctl(XFS_I(inode), file, mode, cmd, (void __user *)arg);
 467         xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
 468
 469         return error;
 470 }
 471
 472 long
 473 xfs_file_compat_ioctl(
 474         struct file             *file,
 475         unsigned                cmd,
 476         unsigned long           arg)
 477 {
 478         return xfs_compat_ioctl(0, file, cmd, arg);
 479 }
 480
 481 long
 482 xfs_file_compat_invis_ioctl(
 483         struct file             *file,
 484         unsigned                cmd,
 485         unsigned long           arg)
 486 {
 487         return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
 488 }