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remove restricted chown parameter from xfs linux

On Linux all filesystems are supposed to be operating under
Posix' restricted chown. Restricted chown means it restricts
chown to the owner unless you have CAP_FOWNER.

NOTE: that 2 files outside of fs/xfs have been modified too
for this change.

Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Merge of xfs-linux-melb:xfs-kern:32413a by kenmcd.

  remove restricted chown parameter from xfs linux

/*
 * Copyright (c) 2001-2005 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
 */
#ifndef __XFS_SYSCTL_H__
#define __XFS_SYSCTL_H__

#include <linux/sysctl.h>

/*
 * Tunable xfs parameters
 */

typedef struct xfs_sysctl_val {
	int min;
	int val;
	int max;
} xfs_sysctl_val_t;

typedef struct xfs_param {
	xfs_sysctl_val_t sgid_inherit;	/* Inherit S_ISGID if process' GID is
					 * not a member of parent dir GID. */
	xfs_sysctl_val_t symlink_mode;	/* Link creat mode affected by umask */
	xfs_sysctl_val_t panic_mask;	/* bitmask to cause panic on errors. */
	xfs_sysctl_val_t error_level;	/* Degree of reporting for problems  */
	xfs_sysctl_val_t syncd_timer;	/* Interval between xfssyncd wakeups */
	xfs_sysctl_val_t stats_clear;	/* Reset all XFS statistics to zero. */
	xfs_sysctl_val_t inherit_sync;	/* Inherit the "sync" inode flag. */
	xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
	xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
	xfs_sysctl_val_t xfs_buf_timer;	/* Interval between xfsbufd wakeups. */
	xfs_sysctl_val_t xfs_buf_age;	/* Metadata buffer age before flush. */
	xfs_sysctl_val_t inherit_nosym;	/* Inherit the "nosymlinks" flag. */
	xfs_sysctl_val_t rotorstep;	/* inode32 AG rotoring control knob */
	xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
	xfs_sysctl_val_t fstrm_timer;	/* Filestream dir-AG assoc'n timeout. */
} xfs_param_t;

/*
 * xfs_error_level:
 *
 * How much error reporting will be done when internal problems are
 * encountered.  These problems normally return an EFSCORRUPTED to their
 * caller, with no other information reported.
 *
 * 0	No error reports
 * 1	Report EFSCORRUPTED errors that will cause a filesystem shutdown
 * 5	Report all EFSCORRUPTED errors (all of the above errors, plus any
 *	additional errors that are known to not cause shutdowns)
 *
 * xfs_panic_mask bit 0x8 turns the error reports into panics
 */

enum {
	/* XFS_REFCACHE_SIZE = 1 */
	/* XFS_REFCACHE_PURGE = 2 */
	/* XFS_RESTRICT_CHOWN = 3 */
	XFS_SGID_INHERIT = 4,
	XFS_SYMLINK_MODE = 5,
	XFS_PANIC_MASK = 6,
	XFS_ERRLEVEL = 7,
	XFS_SYNCD_TIMER = 8,
	/* XFS_PROBE_DMAPI = 9, */
	/* XFS_PROBE_IOOPS = 10, */
	/* XFS_PROBE_QUOTA = 11, */
	XFS_STATS_CLEAR = 12,
	XFS_INHERIT_SYNC = 13,
	XFS_INHERIT_NODUMP = 14,
	XFS_INHERIT_NOATIME = 15,
	XFS_BUF_TIMER = 16,
	XFS_BUF_AGE = 17,
	/* XFS_IO_BYPASS = 18 */
	XFS_INHERIT_NOSYM = 19,
	XFS_ROTORSTEP = 20,
	XFS_INHERIT_NODFRG = 21,
	XFS_FILESTREAM_TIMER = 22,
};

extern xfs_param_t	xfs_params;

#ifdef CONFIG_SYSCTL
extern int xfs_sysctl_register(void);
extern void xfs_sysctl_unregister(void);
#else
# define xfs_sysctl_register()		(0)
# define xfs_sysctl_unregister()	do { } while (0)
#endif /* CONFIG_SYSCTL */

#endif /* __XFS_SYSCTL_H__ */