Commit 3b2816be authored by Lachlan McIlroy's avatar Lachlan McIlroy
Browse files

[XFS] The forward declarations for the xfs_ioctl() helpers and the 


associated comment about gcc behavior really aren't needed; all of these
functions are marked STATIC which includes noinline, and the stack usage
won't be a problem.

This effectively just removes the forward declarations and moves
xfs_ioctl() back to the end of the file.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30534a

Signed-off-by: default avatarEric Sandeen <sandeen@sandeen.net>
Signed-off-by: default avatarNiv Sardi <xaiki@sgi.com>
Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
parent f6e9f288

fs/xfs/linux-2.6/xfs_ioctl.c

+2 −312
Original line number Diff line number Diff line
@@ -651,314 +651,6 @@ xfs_attrmulti_by_handle( 
	return -error;

}



/* prototypes for a few of the stack-hungry cases that have

 * their own functions.  Functions are defined after their use

 * so gcc doesn't get fancy and inline them with -03 */



STATIC int

xfs_ioc_space(

	struct xfs_inode	*ip,

	struct inode		*inode,

	struct file		*filp,

	int			flags,

	unsigned int		cmd,

	void			__user *arg);



STATIC int

xfs_ioc_bulkstat(

	xfs_mount_t		*mp,

	unsigned int		cmd,

	void			__user *arg);



STATIC int

xfs_ioc_fsgeometry_v1(

	xfs_mount_t		*mp,

	void			__user *arg);



STATIC int

xfs_ioc_fsgeometry(

	xfs_mount_t		*mp,

	void			__user *arg);



STATIC int

xfs_ioc_xattr(

	xfs_inode_t		*ip,

	struct file		*filp,

	unsigned int		cmd,

	void			__user *arg);



STATIC int

xfs_ioc_fsgetxattr(

	xfs_inode_t		*ip,

	int			attr,

	void			__user *arg);



STATIC int

xfs_ioc_getbmap(

	struct xfs_inode	*ip,

	int			flags,

	unsigned int		cmd,

	void			__user *arg);



STATIC int

xfs_ioc_getbmapx(

	struct xfs_inode	*ip,

	void			__user *arg);



int

xfs_ioctl(

	xfs_inode_t		*ip,

	struct file		*filp,

	int			ioflags,

	unsigned int		cmd,

	void			__user *arg)

{

	struct inode		*inode = filp->f_path.dentry->d_inode;

	xfs_mount_t		*mp = ip->i_mount;

	int			error;



	xfs_itrace_entry(XFS_I(inode));

	switch (cmd) {



	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:

		/*

		 * Only allow the sys admin to reserve space unless

		 * unwritten extents are enabled.

		 */

		if (!xfs_sb_version_hasextflgbit(&mp->m_sb) &&

		    !capable(CAP_SYS_ADMIN))

			return -EPERM;



		return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg);



	case XFS_IOC_DIOINFO: {

		struct dioattr	da;

		xfs_buftarg_t	*target =

			XFS_IS_REALTIME_INODE(ip) ?

			mp->m_rtdev_targp : mp->m_ddev_targp;



		da.d_mem = da.d_miniosz = 1 << target->bt_sshift;

		da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);



		if (copy_to_user(arg, &da, sizeof(da)))

			return -XFS_ERROR(EFAULT);

		return 0;

	}



	case XFS_IOC_FSBULKSTAT_SINGLE:

	case XFS_IOC_FSBULKSTAT:

	case XFS_IOC_FSINUMBERS:

		return xfs_ioc_bulkstat(mp, cmd, arg);



	case XFS_IOC_FSGEOMETRY_V1:

		return xfs_ioc_fsgeometry_v1(mp, arg);



	case XFS_IOC_FSGEOMETRY:

		return xfs_ioc_fsgeometry(mp, arg);



	case XFS_IOC_GETVERSION:

		return put_user(inode->i_generation, (int __user *)arg);



	case XFS_IOC_FSGETXATTR:

		return xfs_ioc_fsgetxattr(ip, 0, arg);

	case XFS_IOC_FSGETXATTRA:

		return xfs_ioc_fsgetxattr(ip, 1, arg);

	case XFS_IOC_GETXFLAGS:

	case XFS_IOC_SETXFLAGS:

	case XFS_IOC_FSSETXATTR:

		return xfs_ioc_xattr(ip, filp, cmd, arg);



	case XFS_IOC_FSSETDM: {

		struct fsdmidata	dmi;



		if (copy_from_user(&dmi, arg, sizeof(dmi)))

			return -XFS_ERROR(EFAULT);



		error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,

				dmi.fsd_dmstate);

		return -error;

	}



	case XFS_IOC_GETBMAP:

	case XFS_IOC_GETBMAPA:

		return xfs_ioc_getbmap(ip, ioflags, cmd, arg);



	case XFS_IOC_GETBMAPX:

		return xfs_ioc_getbmapx(ip, arg);



	case XFS_IOC_FD_TO_HANDLE:

	case XFS_IOC_PATH_TO_HANDLE:

	case XFS_IOC_PATH_TO_FSHANDLE:

		return xfs_find_handle(cmd, arg);



	case XFS_IOC_OPEN_BY_HANDLE:

		return xfs_open_by_handle(mp, arg, filp, inode);



	case XFS_IOC_FSSETDM_BY_HANDLE:

		return xfs_fssetdm_by_handle(mp, arg, inode);



	case XFS_IOC_READLINK_BY_HANDLE:

		return xfs_readlink_by_handle(mp, arg, inode);



	case XFS_IOC_ATTRLIST_BY_HANDLE:

		return xfs_attrlist_by_handle(mp, arg, inode);



	case XFS_IOC_ATTRMULTI_BY_HANDLE:

		return xfs_attrmulti_by_handle(mp, arg, inode);



	case XFS_IOC_SWAPEXT: {

		error = xfs_swapext((struct xfs_swapext __user *)arg);

		return -error;

	}



	case XFS_IOC_FSCOUNTS: {

		xfs_fsop_counts_t out;



		error = xfs_fs_counts(mp, &out);

		if (error)

			return -error;



		if (copy_to_user(arg, &out, sizeof(out)))

			return -XFS_ERROR(EFAULT);

		return 0;

	}



	case XFS_IOC_SET_RESBLKS: {

		xfs_fsop_resblks_t inout;

		__uint64_t	   in;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (copy_from_user(&inout, arg, sizeof(inout)))

			return -XFS_ERROR(EFAULT);



		/* input parameter is passed in resblks field of structure */

		in = inout.resblks;

		error = xfs_reserve_blocks(mp, &in, &inout);

		if (error)

			return -error;



		if (copy_to_user(arg, &inout, sizeof(inout)))

			return -XFS_ERROR(EFAULT);

		return 0;

	}



	case XFS_IOC_GET_RESBLKS: {

		xfs_fsop_resblks_t out;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		error = xfs_reserve_blocks(mp, NULL, &out);

		if (error)

			return -error;



		if (copy_to_user(arg, &out, sizeof(out)))

			return -XFS_ERROR(EFAULT);



		return 0;

	}



	case XFS_IOC_FSGROWFSDATA: {

		xfs_growfs_data_t in;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (copy_from_user(&in, arg, sizeof(in)))

			return -XFS_ERROR(EFAULT);



		error = xfs_growfs_data(mp, &in);

		return -error;

	}



	case XFS_IOC_FSGROWFSLOG: {

		xfs_growfs_log_t in;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (copy_from_user(&in, arg, sizeof(in)))

			return -XFS_ERROR(EFAULT);



		error = xfs_growfs_log(mp, &in);

		return -error;

	}



	case XFS_IOC_FSGROWFSRT: {

		xfs_growfs_rt_t in;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (copy_from_user(&in, arg, sizeof(in)))

			return -XFS_ERROR(EFAULT);



		error = xfs_growfs_rt(mp, &in);

		return -error;

	}



	case XFS_IOC_FREEZE:

		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (inode->i_sb->s_frozen == SB_UNFROZEN)

			freeze_bdev(inode->i_sb->s_bdev);

		return 0;



	case XFS_IOC_THAW:

		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;

		if (inode->i_sb->s_frozen != SB_UNFROZEN)

			thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);

		return 0;



	case XFS_IOC_GOINGDOWN: {

		__uint32_t in;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (get_user(in, (__uint32_t __user *)arg))

			return -XFS_ERROR(EFAULT);



		error = xfs_fs_goingdown(mp, in);

		return -error;

	}



	case XFS_IOC_ERROR_INJECTION: {

		xfs_error_injection_t in;



		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		if (copy_from_user(&in, arg, sizeof(in)))

			return -XFS_ERROR(EFAULT);



		error = xfs_errortag_add(in.errtag, mp);

		return -error;

	}



	case XFS_IOC_ERROR_CLEARALL:

		if (!capable(CAP_SYS_ADMIN))

			return -EPERM;



		error = xfs_errortag_clearall(mp, 1);

		return -error;



	default:

		return -ENOTTY;

	}

}



STATIC int

xfs_ioc_space(

	struct xfs_inode	*ip,
@@ -1398,12 +1090,10 @@ xfs_ioctl( 
		return xfs_ioc_fsgetxattr(ip, 0, arg);

	case XFS_IOC_FSGETXATTRA:

		return xfs_ioc_fsgetxattr(ip, 1, arg);

	case XFS_IOC_FSSETXATTR:

		return xfs_ioc_fssetxattr(ip, filp, arg);

	case XFS_IOC_GETXFLAGS:

		return xfs_ioc_getxflags(ip, arg);

	case XFS_IOC_SETXFLAGS:

		return xfs_ioc_setxflags(ip, filp, arg);

	case XFS_IOC_FSSETXATTR:

		return xfs_ioc_xattr(ip, filp, cmd, arg);



	case XFS_IOC_FSSETDM: {

		struct fsdmidata	dmi;

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