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root/fs/xfs/linux-2.6/xfs_ioctl32.c

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DEFINITIONS

This source file includes following definitions.
  1. xfs_ioctl32_flock
  2. xfs_ioctl32_geom_v1
  3. xfs_inumbers_fmt_compat
  4. xfs_bstime_store_compat
  5. xfs_bulkstat_one_fmt_compat
  6. xfs_ioc_bulkstat_compat
  7. xfs_ioctl32_fshandle
  8. xfs_compat_ioctl
  9. xfs_file_compat_ioctl
  10. xfs_file_compat_invis_ioctl

/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/compat.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/syscalls.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_attr_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_vfs.h"
#include "xfs_vnode.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_dfrag.h"
#include "xfs_vnodeops.h"
#include "xfs_ioctl32.h"

#define  _NATIVE_IOC(cmd, type) \
          _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))

#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
#define BROKEN_X86_ALIGNMENT
#define _PACKED __attribute__((packed))
/* on ia32 l_start is on a 32-bit boundary */
typedef struct xfs_flock64_32 {
        __s16           l_type;
        __s16           l_whence;
        __s64           l_start __attribute__((packed));
                        /* len == 0 means until end of file */
        __s64           l_len __attribute__((packed));
        __s32           l_sysid;
        __u32           l_pid;
        __s32           l_pad[4];       /* reserve area */
} xfs_flock64_32_t;

#define XFS_IOC_ALLOCSP_32      _IOW ('X', 10, struct xfs_flock64_32)
#define XFS_IOC_FREESP_32       _IOW ('X', 11, struct xfs_flock64_32)
#define XFS_IOC_ALLOCSP64_32    _IOW ('X', 36, struct xfs_flock64_32)
#define XFS_IOC_FREESP64_32     _IOW ('X', 37, struct xfs_flock64_32)
#define XFS_IOC_RESVSP_32       _IOW ('X', 40, struct xfs_flock64_32)
#define XFS_IOC_UNRESVSP_32     _IOW ('X', 41, struct xfs_flock64_32)
#define XFS_IOC_RESVSP64_32     _IOW ('X', 42, struct xfs_flock64_32)
#define XFS_IOC_UNRESVSP64_32   _IOW ('X', 43, struct xfs_flock64_32)

/* just account for different alignment */
STATIC unsigned long
xfs_ioctl32_flock(
        unsigned long           arg)
{
        xfs_flock64_32_t        __user *p32 = (void __user *)arg;
        xfs_flock64_t           __user *p = compat_alloc_user_space(sizeof(*p));

        if (copy_in_user(&p->l_type,    &p32->l_type,   sizeof(s16)) ||
            copy_in_user(&p->l_whence,  &p32->l_whence, sizeof(s16)) ||
            copy_in_user(&p->l_start,   &p32->l_start,  sizeof(s64)) ||
            copy_in_user(&p->l_len,     &p32->l_len,    sizeof(s64)) ||
            copy_in_user(&p->l_sysid,   &p32->l_sysid,  sizeof(s32)) ||
            copy_in_user(&p->l_pid,     &p32->l_pid,    sizeof(u32)) ||
            copy_in_user(&p->l_pad,     &p32->l_pad,    4*sizeof(u32)))
                return -EFAULT;

        return (unsigned long)p;
}

typedef struct compat_xfs_fsop_geom_v1 {
        __u32           blocksize;      /* filesystem (data) block size */
        __u32           rtextsize;      /* realtime extent size         */
        __u32           agblocks;       /* fsblocks in an AG            */
        __u32           agcount;        /* number of allocation groups  */
        __u32           logblocks;      /* fsblocks in the log          */
        __u32           sectsize;       /* (data) sector size, bytes    */
        __u32           inodesize;      /* inode size in bytes          */
        __u32           imaxpct;        /* max allowed inode space(%)   */
        __u64           datablocks;     /* fsblocks in data subvolume   */
        __u64           rtblocks;       /* fsblocks in realtime subvol  */
        __u64           rtextents;      /* rt extents in realtime subvol*/
        __u64           logstart;       /* starting fsblock of the log  */
        unsigned char   uuid[16];       /* unique id of the filesystem  */
        __u32           sunit;          /* stripe unit, fsblocks        */
        __u32           swidth;         /* stripe width, fsblocks       */
        __s32           version;        /* structure version            */
        __u32           flags;          /* superblock version flags     */
        __u32           logsectsize;    /* log sector size, bytes       */
        __u32           rtsectsize;     /* realtime sector size, bytes  */
        __u32           dirblocksize;   /* directory block size, bytes  */
} __attribute__((packed)) compat_xfs_fsop_geom_v1_t;

#define XFS_IOC_FSGEOMETRY_V1_32  \
        _IOR ('X', 100, struct compat_xfs_fsop_geom_v1)

STATIC unsigned long xfs_ioctl32_geom_v1(unsigned long arg)
{
        compat_xfs_fsop_geom_v1_t __user *p32 = (void __user *)arg;
        xfs_fsop_geom_v1_t __user *p = compat_alloc_user_space(sizeof(*p));

        if (copy_in_user(p, p32, sizeof(*p32)))
                return -EFAULT;
        return (unsigned long)p;
}

typedef struct compat_xfs_inogrp {
        __u64           xi_startino;    /* starting inode number        */
        __s32           xi_alloccount;  /* # bits set in allocmask      */
        __u64           xi_allocmask;   /* mask of allocated inodes     */
} __attribute__((packed)) compat_xfs_inogrp_t;

STATIC int xfs_inumbers_fmt_compat(
        void __user *ubuffer,
        const xfs_inogrp_t *buffer,
        long count,
        long *written)
{
        compat_xfs_inogrp_t __user *p32 = ubuffer;
        long i;

        for (i = 0; i < count; i++) {
                if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
                    put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
                    put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
                        return -EFAULT;
        }
        *written = count * sizeof(*p32);
        return 0;
}

#else

#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
#define _PACKED

#endif

/* XFS_IOC_FSBULKSTAT and friends */

typedef struct compat_xfs_bstime {
        __s32           tv_sec;         /* seconds              */
        __s32           tv_nsec;        /* and nanoseconds      */
} compat_xfs_bstime_t;

STATIC int xfs_bstime_store_compat(
        compat_xfs_bstime_t __user *p32,
        const xfs_bstime_t *p)
{
        __s32 sec32;

        sec32 = p->tv_sec;
        if (put_user(sec32, &p32->tv_sec) ||
            put_user(p->tv_nsec, &p32->tv_nsec))
                return -EFAULT;
        return 0;
}

typedef struct compat_xfs_bstat {
        __u64           bs_ino;         /* inode number                 */
        __u16           bs_mode;        /* type and mode                */
        __u16           bs_nlink;       /* number of links              */
        __u32           bs_uid;         /* user id                      */
        __u32           bs_gid;         /* group id                     */
        __u32           bs_rdev;        /* device value                 */
        __s32           bs_blksize;     /* block size                   */
        __s64           bs_size;        /* file size                    */
        compat_xfs_bstime_t bs_atime;   /* access time                  */
        compat_xfs_bstime_t bs_mtime;   /* modify time                  */
        compat_xfs_bstime_t bs_ctime;   /* inode change time            */
        int64_t         bs_blocks;      /* number of blocks             */
        __u32           bs_xflags;      /* extended flags               */
        __s32           bs_extsize;     /* extent size                  */
        __s32           bs_extents;     /* number of extents            */
        __u32           bs_gen;         /* generation count             */
        __u16           bs_projid;      /* project id                   */
        unsigned char   bs_pad[14];     /* pad space, unused            */
        __u32           bs_dmevmask;    /* DMIG event mask              */
        __u16           bs_dmstate;     /* DMIG state info              */
        __u16           bs_aextents;    /* attribute number of extents  */
} _PACKED compat_xfs_bstat_t;

STATIC int xfs_bulkstat_one_fmt_compat(
        void                    __user *ubuffer,
        const xfs_bstat_t       *buffer)
{
        compat_xfs_bstat_t __user *p32 = ubuffer;

        if (put_user(buffer->bs_ino, &p32->bs_ino) ||
            put_user(buffer->bs_mode, &p32->bs_mode) ||
            put_user(buffer->bs_nlink, &p32->bs_nlink) ||
            put_user(buffer->bs_uid, &p32->bs_uid) ||
            put_user(buffer->bs_gid, &p32->bs_gid) ||
            put_user(buffer->bs_rdev, &p32->bs_rdev) ||
            put_user(buffer->bs_blksize, &p32->bs_blksize) ||
            put_user(buffer->bs_size, &p32->bs_size) ||
            xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
            xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
            xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
            put_user(buffer->bs_blocks, &p32->bs_blocks) ||
            put_user(buffer->bs_xflags, &p32->bs_xflags) ||
            put_user(buffer->bs_extsize, &p32->bs_extsize) ||
            put_user(buffer->bs_extents, &p32->bs_extents) ||
            put_user(buffer->bs_gen, &p32->bs_gen) ||
            put_user(buffer->bs_projid, &p32->bs_projid) ||
            put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
            put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
            put_user(buffer->bs_aextents, &p32->bs_aextents))
                return -EFAULT;
        return sizeof(*p32);
}



typedef struct compat_xfs_fsop_bulkreq {
        compat_uptr_t   lastip;         /* last inode # pointer         */
        __s32           icount;         /* count of entries in buffer   */
        compat_uptr_t   ubuffer;        /* user buffer for inode desc.  */
        compat_uptr_t   ocount;         /* output count pointer         */
} compat_xfs_fsop_bulkreq_t;

#define XFS_IOC_FSBULKSTAT_32 \
        _IOWR('X', 101, struct compat_xfs_fsop_bulkreq)
#define XFS_IOC_FSBULKSTAT_SINGLE_32 \
        _IOWR('X', 102, struct compat_xfs_fsop_bulkreq)
#define XFS_IOC_FSINUMBERS_32 \
        _IOWR('X', 103, struct compat_xfs_fsop_bulkreq)

/* copied from xfs_ioctl.c */
STATIC int
xfs_ioc_bulkstat_compat(
        xfs_mount_t             *mp,
        unsigned int            cmd,
        void                    __user *arg)
{
        compat_xfs_fsop_bulkreq_t __user *p32 = (void __user *)arg;
        u32                     addr;
        xfs_fsop_bulkreq_t      bulkreq;
        int                     count;  /* # of records returned */
        xfs_ino_t               inlast; /* last inode number */
        int                     done;
        int                     error;

        /* done = 1 if there are more stats to get and if bulkstat */
        /* should be called again (unused here, but used in dmapi) */

        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;

        if (XFS_FORCED_SHUTDOWN(mp))
                return -XFS_ERROR(EIO);

        if (get_user(addr, &p32->lastip))
                return -EFAULT;
        bulkreq.lastip = compat_ptr(addr);
        if (get_user(bulkreq.icount, &p32->icount) ||
            get_user(addr, &p32->ubuffer))
                return -EFAULT;
        bulkreq.ubuffer = compat_ptr(addr);
        if (get_user(addr, &p32->ocount))
                return -EFAULT;
        bulkreq.ocount = compat_ptr(addr);

        if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
                return -XFS_ERROR(EFAULT);

        if ((count = bulkreq.icount) <= 0)
                return -XFS_ERROR(EINVAL);

        if (bulkreq.ubuffer == NULL)
                return -XFS_ERROR(EINVAL);

        if (cmd == XFS_IOC_FSINUMBERS)
                error = xfs_inumbers(mp, &inlast, &count,
                                bulkreq.ubuffer, xfs_inumbers_fmt_compat);
        else {
                /* declare a var to get a warning in case the type changes */
                bulkstat_one_fmt_pf formatter = xfs_bulkstat_one_fmt_compat;
                error = xfs_bulkstat(mp, &inlast, &count,
                        xfs_bulkstat_one, formatter,
                        sizeof(compat_xfs_bstat_t), bulkreq.ubuffer,
                        BULKSTAT_FG_QUICK, &done);
        }
        if (error)
                return -error;

        if (bulkreq.ocount != NULL) {
                if (copy_to_user(bulkreq.lastip, &inlast,
                                                sizeof(xfs_ino_t)))
                        return -XFS_ERROR(EFAULT);

                if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
                        return -XFS_ERROR(EFAULT);
        }

        return 0;
}



typedef struct compat_xfs_fsop_handlereq {
        __u32           fd;             /* fd for FD_TO_HANDLE          */
        compat_uptr_t   path;           /* user pathname                */
        __u32           oflags;         /* open flags                   */
        compat_uptr_t   ihandle;        /* user supplied handle         */
        __u32           ihandlen;       /* user supplied length         */
        compat_uptr_t   ohandle;        /* user buffer for handle       */
        compat_uptr_t   ohandlen;       /* user buffer length           */
} compat_xfs_fsop_handlereq_t;

#define XFS_IOC_PATH_TO_FSHANDLE_32 \
        _IOWR('X', 104, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_PATH_TO_HANDLE_32 \
        _IOWR('X', 105, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_FD_TO_HANDLE_32 \
        _IOWR('X', 106, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_OPEN_BY_HANDLE_32 \
        _IOWR('X', 107, struct compat_xfs_fsop_handlereq)
#define XFS_IOC_READLINK_BY_HANDLE_32 \
        _IOWR('X', 108, struct compat_xfs_fsop_handlereq)

STATIC unsigned long xfs_ioctl32_fshandle(unsigned long arg)
{
        compat_xfs_fsop_handlereq_t __user *p32 = (void __user *)arg;
        xfs_fsop_handlereq_t __user *p = compat_alloc_user_space(sizeof(*p));
        u32 addr;

        if (copy_in_user(&p->fd, &p32->fd, sizeof(__u32)) ||
            get_user(addr, &p32->path) ||
            put_user(compat_ptr(addr), &p->path) ||
            copy_in_user(&p->oflags, &p32->oflags, sizeof(__u32)) ||
            get_user(addr, &p32->ihandle) ||
            put_user(compat_ptr(addr), &p->ihandle) ||
            copy_in_user(&p->ihandlen, &p32->ihandlen, sizeof(__u32)) ||
            get_user(addr, &p32->ohandle) ||
            put_user(compat_ptr(addr), &p->ohandle) ||
            get_user(addr, &p32->ohandlen) ||
            put_user(compat_ptr(addr), &p->ohandlen))
                return -EFAULT;

        return (unsigned long)p;
}


STATIC long
xfs_compat_ioctl(
        int             mode,
        struct file     *file,
        unsigned        cmd,
        unsigned long   arg)
{
        struct inode    *inode = file->f_path.dentry->d_inode;
        int             error;

        switch (cmd) {
        case XFS_IOC_DIOINFO:
        case XFS_IOC_FSGEOMETRY:
        case XFS_IOC_FSGETXATTR:
        case XFS_IOC_FSSETXATTR:
        case XFS_IOC_FSGETXATTRA:
        case XFS_IOC_FSSETDM:
        case XFS_IOC_GETBMAP:
        case XFS_IOC_GETBMAPA:
        case XFS_IOC_GETBMAPX:
/* not handled
        case XFS_IOC_FSSETDM_BY_HANDLE:
        case XFS_IOC_ATTRLIST_BY_HANDLE:
        case XFS_IOC_ATTRMULTI_BY_HANDLE:
*/
        case XFS_IOC_FSCOUNTS:
        case XFS_IOC_SET_RESBLKS:
        case XFS_IOC_GET_RESBLKS:
        case XFS_IOC_FSGROWFSDATA:
        case XFS_IOC_FSGROWFSLOG:
        case XFS_IOC_FSGROWFSRT:
        case XFS_IOC_FREEZE:
        case XFS_IOC_THAW:
        case XFS_IOC_GOINGDOWN:
        case XFS_IOC_ERROR_INJECTION:
        case XFS_IOC_ERROR_CLEARALL:
                break;

        case XFS_IOC32_GETXFLAGS:
        case XFS_IOC32_SETXFLAGS:
        case XFS_IOC32_GETVERSION:
                cmd = _NATIVE_IOC(cmd, long);
                break;
#ifdef BROKEN_X86_ALIGNMENT
        /* xfs_flock_t has wrong u32 vs u64 alignment */
        case XFS_IOC_ALLOCSP_32:
        case XFS_IOC_FREESP_32:
        case XFS_IOC_ALLOCSP64_32:
        case XFS_IOC_FREESP64_32:
        case XFS_IOC_RESVSP_32:
        case XFS_IOC_UNRESVSP_32:
        case XFS_IOC_RESVSP64_32:
        case XFS_IOC_UNRESVSP64_32:
                arg = xfs_ioctl32_flock(arg);
                cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
                break;
        case XFS_IOC_FSGEOMETRY_V1_32:
                arg = xfs_ioctl32_geom_v1(arg);
                cmd = _NATIVE_IOC(cmd, struct xfs_fsop_geom_v1);
                break;

#else /* These are handled fine if no alignment issues */
        case XFS_IOC_ALLOCSP:
        case XFS_IOC_FREESP:
        case XFS_IOC_RESVSP:
        case XFS_IOC_UNRESVSP:
        case XFS_IOC_ALLOCSP64:
        case XFS_IOC_FREESP64:
        case XFS_IOC_RESVSP64:
        case XFS_IOC_UNRESVSP64:
        case XFS_IOC_FSGEOMETRY_V1:
                break;

        /* xfs_bstat_t still has wrong u32 vs u64 alignment */
        case XFS_IOC_SWAPEXT:
                break;

#endif
        case XFS_IOC_FSBULKSTAT_32:
        case XFS_IOC_FSBULKSTAT_SINGLE_32:
        case XFS_IOC_FSINUMBERS_32:
                cmd = _NATIVE_IOC(cmd, struct xfs_fsop_bulkreq);
                return xfs_ioc_bulkstat_compat(XFS_I(inode)->i_mount,
                                cmd, (void __user*)arg);
        case XFS_IOC_FD_TO_HANDLE_32:
        case XFS_IOC_PATH_TO_HANDLE_32:
        case XFS_IOC_PATH_TO_FSHANDLE_32:
        case XFS_IOC_OPEN_BY_HANDLE_32:
        case XFS_IOC_READLINK_BY_HANDLE_32:
                arg = xfs_ioctl32_fshandle(arg);
                cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
                break;
        default:
                return -ENOIOCTLCMD;
        }

        error = xfs_ioctl(XFS_I(inode), file, mode, cmd, (void __user *)arg);
        xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);

        return error;
}

long
xfs_file_compat_ioctl(
        struct file             *file,
        unsigned                cmd,
        unsigned long           arg)
{
        return xfs_compat_ioctl(0, file, cmd, arg);
}

long
xfs_file_compat_invis_ioctl(
        struct file             *file,
        unsigned                cmd,
        unsigned long           arg)
{
        return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
}

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