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_types.h"
  27 #include "xfs_fs.h"
  28 #include "xfs_vfs.h"
  29 #include "xfs_vnode.h"
  30 #include "xfs_dfrag.h"
  31
  32 #define  _NATIVE_IOC(cmd, type) \
  33           _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
  34
  35 #if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
  36 #define BROKEN_X86_ALIGNMENT
  37 /* on ia32 l_start is on a 32-bit boundary */
  38 typedef struct xfs_flock64_32 {
  39         __s16           l_type;
  40         __s16           l_whence;
  41         __s64           l_start __attribute__((packed));
  42                         /* len == 0 means until end of file */
  43         __s64           l_len __attribute__((packed));
  44         __s32           l_sysid;
  45         __u32           l_pid;
  46         __s32           l_pad[4];       /* reserve area */
  47 } xfs_flock64_32_t;
  48
  49 #define XFS_IOC_ALLOCSP_32      _IOW ('X', 10, struct xfs_flock64_32)
  50 #define XFS_IOC_FREESP_32       _IOW ('X', 11, struct xfs_flock64_32)
  51 #define XFS_IOC_ALLOCSP64_32    _IOW ('X', 36, struct xfs_flock64_32)
  52 #define XFS_IOC_FREESP64_32     _IOW ('X', 37, struct xfs_flock64_32)
  53 #define XFS_IOC_RESVSP_32       _IOW ('X', 40, struct xfs_flock64_32)
  54 #define XFS_IOC_UNRESVSP_32     _IOW ('X', 41, struct xfs_flock64_32)
  55 #define XFS_IOC_RESVSP64_32     _IOW ('X', 42, struct xfs_flock64_32)
  56 #define XFS_IOC_UNRESVSP64_32   _IOW ('X', 43, struct xfs_flock64_32)
  57
  58 /* just account for different alignment */
  59 STATIC unsigned long
  60 xfs_ioctl32_flock(
  61         unsigned long           arg)
  62 {
  63         xfs_flock64_32_t        __user *p32 = (void __user *)arg;
  64         xfs_flock64_t           __user *p = compat_alloc_user_space(sizeof(*p));
  65
  66         if (copy_in_user(&p->l_type,    &p32->l_type,   sizeof(s16)) ||
  67             copy_in_user(&p->l_whence,  &p32->l_whence, sizeof(s16)) ||
  68             copy_in_user(&p->l_start,   &p32->l_start,  sizeof(s64)) ||
  69             copy_in_user(&p->l_len,     &p32->l_len,    sizeof(s64)) ||
  70             copy_in_user(&p->l_sysid,   &p32->l_sysid,  sizeof(s32)) ||
  71             copy_in_user(&p->l_pid,     &p32->l_pid,    sizeof(u32)) ||
  72             copy_in_user(&p->l_pad,     &p32->l_pad,    4*sizeof(u32)))
  73                 return -EFAULT;
  74
  75         return (unsigned long)p;
  76 }
  77
  78 #else
  79
  80 typedef struct xfs_fsop_bulkreq32 {
  81         compat_uptr_t   lastip;         /* last inode # pointer         */
  82         __s32           icount;         /* count of entries in buffer   */
  83         compat_uptr_t   ubuffer;        /* user buffer for inode desc.  */
  84         __s32           ocount;         /* output count pointer         */
  85 } xfs_fsop_bulkreq32_t;
  86
  87 STATIC unsigned long
  88 xfs_ioctl32_bulkstat(
  89         unsigned long           arg)
  90 {
  91         xfs_fsop_bulkreq32_t    __user *p32 = (void __user *)arg;
  92         xfs_fsop_bulkreq_t      __user *p = compat_alloc_user_space(sizeof(*p));
  93         u32                     addr;
  94
  95         if (get_user(addr, &p32->lastip) ||
  96             put_user(compat_ptr(addr), &p->lastip) ||
  97             copy_in_user(&p->icount, &p32->icount, sizeof(s32)) ||
  98             get_user(addr, &p32->ubuffer) ||
  99             put_user(compat_ptr(addr), &p->ubuffer) ||
 100             get_user(addr, &p32->ocount) ||
 101             put_user(compat_ptr(addr), &p->ocount))
 102                 return -EFAULT;
 103
 104         return (unsigned long)p;
 105 }
 106 #endif
 107
 108 STATIC long
 109 xfs_compat_ioctl(
 110         int             mode,
 111         struct file     *file,
 112         unsigned        cmd,
 113         unsigned long   arg)
 114 {
 115         struct inode    *inode = file->f_path.dentry->d_inode;
 116         bhv_vnode_t     *vp = vn_from_inode(inode);
 117         int             error;
 118
 119         switch (cmd) {
 120         case XFS_IOC_DIOINFO:
 121         case XFS_IOC_FSGEOMETRY_V1:
 122         case XFS_IOC_FSGEOMETRY:
 123         case XFS_IOC_GETVERSION:
 124         case XFS_IOC_GETXFLAGS:
 125         case XFS_IOC_SETXFLAGS:
 126         case XFS_IOC_FSGETXATTR:
 127         case XFS_IOC_FSSETXATTR:
 128         case XFS_IOC_FSGETXATTRA:
 129         case XFS_IOC_FSSETDM:
 130         case XFS_IOC_GETBMAP:
 131         case XFS_IOC_GETBMAPA:
 132         case XFS_IOC_GETBMAPX:
 133 /* not handled
 134         case XFS_IOC_FD_TO_HANDLE:
 135         case XFS_IOC_PATH_TO_HANDLE:
 136         case XFS_IOC_PATH_TO_FSHANDLE:
 137         case XFS_IOC_OPEN_BY_HANDLE:
 138         case XFS_IOC_FSSETDM_BY_HANDLE:
 139         case XFS_IOC_READLINK_BY_HANDLE:
 140         case XFS_IOC_ATTRLIST_BY_HANDLE:
 141         case XFS_IOC_ATTRMULTI_BY_HANDLE:
 142 */
 143         case XFS_IOC_FSCOUNTS:
 144         case XFS_IOC_SET_RESBLKS:
 145         case XFS_IOC_GET_RESBLKS:
 146         case XFS_IOC_FSGROWFSDATA:
 147         case XFS_IOC_FSGROWFSLOG:
 148         case XFS_IOC_FSGROWFSRT:
 149         case XFS_IOC_FREEZE:
 150         case XFS_IOC_THAW:
 151         case XFS_IOC_GOINGDOWN:
 152         case XFS_IOC_ERROR_INJECTION:
 153         case XFS_IOC_ERROR_CLEARALL:
 154                 break;
 155
 156 #ifdef BROKEN_X86_ALIGNMENT
 157         /* xfs_flock_t has wrong u32 vs u64 alignment */
 158         case XFS_IOC_ALLOCSP_32:
 159         case XFS_IOC_FREESP_32:
 160         case XFS_IOC_ALLOCSP64_32:
 161         case XFS_IOC_FREESP64_32:
 162         case XFS_IOC_RESVSP_32:
 163         case XFS_IOC_UNRESVSP_32:
 164         case XFS_IOC_RESVSP64_32:
 165         case XFS_IOC_UNRESVSP64_32:
 166                 arg = xfs_ioctl32_flock(arg);
 167                 cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 168                 break;
 169
 170 #else /* These are handled fine if no alignment issues */
 171         case XFS_IOC_ALLOCSP:
 172         case XFS_IOC_FREESP:
 173         case XFS_IOC_RESVSP:
 174         case XFS_IOC_UNRESVSP:
 175         case XFS_IOC_ALLOCSP64:
 176         case XFS_IOC_FREESP64:
 177         case XFS_IOC_RESVSP64:
 178         case XFS_IOC_UNRESVSP64:
 179                 break;
 180
 181         /* xfs_bstat_t still has wrong u32 vs u64 alignment */
 182         case XFS_IOC_SWAPEXT:
 183                 break;
 184
 185         case XFS_IOC_FSBULKSTAT_SINGLE:
 186         case XFS_IOC_FSBULKSTAT:
 187         case XFS_IOC_FSINUMBERS:
 188                 arg = xfs_ioctl32_bulkstat(arg);
 189                 break;
 190 #endif
 191         default:
 192                 return -ENOIOCTLCMD;
 193         }
 194
 195         error = bhv_vop_ioctl(vp, inode, file, mode, cmd, (void __user *)arg);
 196         VMODIFY(vp);
 197
 198         return error;
 199 }
 200
 201 long
 202 xfs_file_compat_ioctl(
 203         struct file             *file,
 204         unsigned                cmd,
 205         unsigned long           arg)
 206 {
 207         return xfs_compat_ioctl(0, file, cmd, arg);
 208 }
 209
 210 long
 211 xfs_file_compat_invis_ioctl(
 212         struct file             *file,
 213         unsigned                cmd,
 214         unsigned long           arg)
 215 {
 216         return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
 217 }