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