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/config.h>
  19 #include <linux/compat.h>
  20 #include <linux/init.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/syscalls.h>
  23 #include <linux/types.h>
  24 #include <linux/fs.h>
  25 #include <asm/uaccess.h>
  26 #include "xfs.h"
  27 #include "xfs_types.h"
  28 #include "xfs_fs.h"
  29 #include "xfs_vfs.h"
  30 #include "xfs_vnode.h"
  31 #include "xfs_dfrag.h"
  32
  33 #define  _NATIVE_IOC(cmd, type) \
  34           _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
  35
  36 #if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
  37 #define BROKEN_X86_ALIGNMENT
  38 /* on ia32 l_start is on a 32-bit boundary */
  39 typedef struct xfs_flock64_32 {
  40         __s16           l_type;
  41         __s16           l_whence;
  42         __s64           l_start __attribute__((packed));
  43                         /* len == 0 means until end of file */
  44         __s64           l_len __attribute__((packed));
  45         __s32           l_sysid;
  46         __u32           l_pid;
  47         __s32           l_pad[4];       /* reserve area */
  48 } xfs_flock64_32_t;
  49
  50 #define XFS_IOC_ALLOCSP_32      _IOW ('X', 10, struct xfs_flock64_32)
  51 #define XFS_IOC_FREESP_32       _IOW ('X', 11, struct xfs_flock64_32)
  52 #define XFS_IOC_ALLOCSP64_32    _IOW ('X', 36, struct xfs_flock64_32)
  53 #define XFS_IOC_FREESP64_32     _IOW ('X', 37, struct xfs_flock64_32)
  54 #define XFS_IOC_RESVSP_32       _IOW ('X', 40, struct xfs_flock64_32)
  55 #define XFS_IOC_UNRESVSP_32     _IOW ('X', 41, struct xfs_flock64_32)
  56 #define XFS_IOC_RESVSP64_32     _IOW ('X', 42, struct xfs_flock64_32)
  57 #define XFS_IOC_UNRESVSP64_32   _IOW ('X', 43, struct xfs_flock64_32)
  58
  59 /* just account for different alignment */
  60 STATIC unsigned long
  61 xfs_ioctl32_flock(
  62         unsigned long           arg)
  63 {
  64         xfs_flock64_32_t        __user *p32 = (void __user *)arg;
  65         xfs_flock64_t           __user *p = compat_alloc_user_space(sizeof(*p));
  66
  67         if (copy_in_user(&p->l_type,    &p32->l_type,   sizeof(s16)) ||
  68             copy_in_user(&p->l_whence,  &p32->l_whence, sizeof(s16)) ||
  69             copy_in_user(&p->l_start,   &p32->l_start,  sizeof(s64)) ||
  70             copy_in_user(&p->l_len,     &p32->l_len,    sizeof(s64)) ||
  71             copy_in_user(&p->l_sysid,   &p32->l_sysid,  sizeof(s32)) ||
  72             copy_in_user(&p->l_pid,     &p32->l_pid,    sizeof(u32)) ||
  73             copy_in_user(&p->l_pad,     &p32->l_pad,    4*sizeof(u32)))
  74                 return -EFAULT;
  75
  76         return (unsigned long)p;
  77 }
  78
  79 #else
  80
  81 typedef struct xfs_fsop_bulkreq32 {
  82         compat_uptr_t   lastip;         /* last inode # pointer         */
  83         __s32           icount;         /* count of entries in buffer   */
  84         compat_uptr_t   ubuffer;        /* user buffer for inode desc.  */
  85         __s32           ocount;         /* output count pointer         */
  86 } xfs_fsop_bulkreq32_t;
  87
  88 STATIC unsigned long
  89 xfs_ioctl32_bulkstat(
  90         unsigned long           arg)
  91 {
  92         xfs_fsop_bulkreq32_t    __user *p32 = (void __user *)arg;
  93         xfs_fsop_bulkreq_t      __user *p = compat_alloc_user_space(sizeof(*p));
  94         u32                     addr;
  95
  96         if (get_user(addr, &p32->lastip) ||
  97             put_user(compat_ptr(addr), &p->lastip) ||
  98             copy_in_user(&p->icount, &p32->icount, sizeof(s32)) ||
  99             get_user(addr, &p32->ubuffer) ||
 100             put_user(compat_ptr(addr), &p->ubuffer) ||
 101             get_user(addr, &p32->ocount) ||
 102             put_user(compat_ptr(addr), &p->ocount))
 103                 return -EFAULT;
 104
 105         return (unsigned long)p;
 106 }
 107 #endif
 108
 109 STATIC long
 110 __linvfs_compat_ioctl(int mode, struct file *f, unsigned cmd, unsigned long arg)
 111 {
 112         int             error;
 113         struct          inode *inode = f->f_dentry->d_inode;
 114         vnode_t         *vp = LINVFS_GET_VP(inode);
 115
 116         switch (cmd) {
 117         case XFS_IOC_DIOINFO:
 118         case XFS_IOC_FSGEOMETRY_V1:
 119         case XFS_IOC_FSGEOMETRY:
 120         case XFS_IOC_GETVERSION:
 121         case XFS_IOC_GETXFLAGS:
 122         case XFS_IOC_SETXFLAGS:
 123         case XFS_IOC_FSGETXATTR:
 124         case XFS_IOC_FSSETXATTR:
 125         case XFS_IOC_FSGETXATTRA:
 126         case XFS_IOC_FSSETDM:
 127         case XFS_IOC_GETBMAP:
 128         case XFS_IOC_GETBMAPA:
 129         case XFS_IOC_GETBMAPX:
 130 /* not handled
 131         case XFS_IOC_FD_TO_HANDLE:
 132         case XFS_IOC_PATH_TO_HANDLE:
 133         case XFS_IOC_PATH_TO_FSHANDLE:
 134         case XFS_IOC_OPEN_BY_HANDLE:
 135         case XFS_IOC_FSSETDM_BY_HANDLE:
 136         case XFS_IOC_READLINK_BY_HANDLE:
 137         case XFS_IOC_ATTRLIST_BY_HANDLE:
 138         case XFS_IOC_ATTRMULTI_BY_HANDLE:
 139 */
 140         case XFS_IOC_FSCOUNTS:
 141         case XFS_IOC_SET_RESBLKS:
 142         case XFS_IOC_GET_RESBLKS:
 143         case XFS_IOC_FSGROWFSDATA:
 144         case XFS_IOC_FSGROWFSLOG:
 145         case XFS_IOC_FSGROWFSRT:
 146         case XFS_IOC_FREEZE:
 147         case XFS_IOC_THAW:
 148         case XFS_IOC_GOINGDOWN:
 149         case XFS_IOC_ERROR_INJECTION:
 150         case XFS_IOC_ERROR_CLEARALL:
 151                 break;
 152
 153 #ifdef BROKEN_X86_ALIGNMENT
 154         /* xfs_flock_t has wrong u32 vs u64 alignment */
 155         case XFS_IOC_ALLOCSP_32:
 156         case XFS_IOC_FREESP_32:
 157         case XFS_IOC_ALLOCSP64_32:
 158         case XFS_IOC_FREESP64_32:
 159         case XFS_IOC_RESVSP_32:
 160         case XFS_IOC_UNRESVSP_32:
 161         case XFS_IOC_RESVSP64_32:
 162         case XFS_IOC_UNRESVSP64_32:
 163                 arg = xfs_ioctl32_flock(arg);
 164                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 165                 break;
 166
 167 #else /* These are handled fine if no alignment issues */
 168         case XFS_IOC_ALLOCSP:
 169         case XFS_IOC_FREESP:
 170         case XFS_IOC_RESVSP:
 171         case XFS_IOC_UNRESVSP:
 172         case XFS_IOC_ALLOCSP64:
 173         case XFS_IOC_FREESP64:
 174         case XFS_IOC_RESVSP64:
 175         case XFS_IOC_UNRESVSP64:
 176                 break;
 177
 178         /* xfs_bstat_t still has wrong u32 vs u64 alignment */
 179         case XFS_IOC_SWAPEXT:
 180                 break;
 181
 182         case XFS_IOC_FSBULKSTAT_SINGLE:
 183         case XFS_IOC_FSBULKSTAT:
 184         case XFS_IOC_FSINUMBERS:
 185                 arg = xfs_ioctl32_bulkstat(arg);
 186                 break;
 187 #endif
 188         default:
 189                 return -ENOIOCTLCMD;
 190         }
 191
 192         VOP_IOCTL(vp, inode, f, mode, cmd, (void __user *)arg, error);
 193         VMODIFY(vp);
 194
 195         return error;
 196 }
 197
 198 long
 199 linvfs_compat_ioctl(
 200         struct file             *f,
 201         unsigned                cmd,
 202         unsigned long           arg)
 203 {
 204         return __linvfs_compat_ioctl(0, f, cmd, arg);
 205 }
 206
 207 long
 208 linvfs_compat_invis_ioctl(
 209         struct file             *f,
 210         unsigned                cmd,
 211         unsigned long           arg)
 212 {
 213         return __linvfs_compat_ioctl(IO_INVIS, f, cmd, arg);
 214 }