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kill the vfs_flags member in struct bhv_vfs

All flags are added to xfs_mount's m_flag instead.  Note that the 32bit
inode flag was duplicated in both of them, but only cleared in the
mount when it was not nessecary due to the filesystem beeing small enough.
Two flags are still required here - one to indicate the mount option
setting, and one to indicate if it applies or not.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Merge of xfs-linux-melb:xfs-kern:29507a by kenmcd.

  move vfs_flags to xfs_mount.

/*
 * Copyright (c) 2000-2005 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 "xfs.h"
#include "xfs_fs.h"
#include "xfs_types.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_quota.h"
#include "xfs_error.h"
#include "xfs_clnt.h"


STATIC struct xfs_dquot *
xfs_dqvopchown_default(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	struct xfs_dquot	**dqp,
	struct xfs_dquot	*dq)
{
	return NULL;
}

/*
 * Clear the quotaflags in memory and in the superblock.
 */
int
xfs_mount_reset_sbqflags(xfs_mount_t *mp)
{
	int			error;
	xfs_trans_t		*tp;
	unsigned long		s;

	mp->m_qflags = 0;
	/*
	 * It is OK to look at sb_qflags here in mount path,
	 * without SB_LOCK.
	 */
	if (mp->m_sb.sb_qflags == 0)
		return 0;
	s = XFS_SB_LOCK(mp);
	mp->m_sb.sb_qflags = 0;
	XFS_SB_UNLOCK(mp, s);

	/*
	 * if the fs is readonly, let the incore superblock run
	 * with quotas off but don't flush the update out to disk
	 */
	if (mp->m_flags & XFS_MOUNT_RDONLY)
		return 0;
#ifdef QUOTADEBUG
	xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
#endif
	tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
	if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
				      XFS_DEFAULT_LOG_COUNT))) {
		xfs_trans_cancel(tp, 0);
		xfs_fs_cmn_err(CE_ALERT, mp,
			"xfs_mount_reset_sbqflags: Superblock update failed!");
		return error;
	}
	xfs_mod_sb(tp, XFS_SB_QFLAGS);
	error = xfs_trans_commit(tp, 0);
	return error;
}

STATIC int
xfs_noquota_init(
	xfs_mount_t	*mp,
	uint		*needquotamount,
	uint		*quotaflags)
{
	int		error = 0;

	*quotaflags = 0;
	*needquotamount = B_FALSE;

	ASSERT(!XFS_IS_QUOTA_ON(mp));

	/*
	 * If a file system had quotas running earlier, but decided to
	 * mount without -o uquota/pquota/gquota options, revoke the
	 * quotachecked license.
	 */
	if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
		cmn_err(CE_NOTE,
                        "XFS resetting qflags for filesystem %s",
                        mp->m_fsname);

		error = xfs_mount_reset_sbqflags(mp);
	}
	return error;
}

static struct xfs_qmops xfs_qmcore_stub = {
	.xfs_qminit		= (xfs_qminit_t) xfs_noquota_init,
	.xfs_qmdone		= (xfs_qmdone_t) fs_noerr,
	.xfs_qmmount		= (xfs_qmmount_t) fs_noerr,
	.xfs_qmunmount		= (xfs_qmunmount_t) fs_noerr,
	.xfs_dqrele		= (xfs_dqrele_t) fs_noerr,
	.xfs_dqattach		= (xfs_dqattach_t) fs_noerr,
	.xfs_dqdetach		= (xfs_dqdetach_t) fs_noerr,
	.xfs_dqpurgeall		= (xfs_dqpurgeall_t) fs_noerr,
	.xfs_dqvopalloc		= (xfs_dqvopalloc_t) fs_noerr,
	.xfs_dqvopcreate	= (xfs_dqvopcreate_t) fs_noerr,
	.xfs_dqvoprename	= (xfs_dqvoprename_t) fs_noerr,
	.xfs_dqvopchown		= xfs_dqvopchown_default,
	.xfs_dqvopchownresv	= (xfs_dqvopchownresv_t) fs_noerr,
	.xfs_dqstatvfs		= (xfs_dqstatvfs_t) fs_noval,
	.xfs_dqsync		= (xfs_dqsync_t) fs_noerr,
	.xfs_quotactl		= (xfs_quotactl_t) fs_nosys,
};

int
xfs_qmops_get(struct xfs_mount *mp, struct xfs_mount_args *args)
{
	if (args->flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA)) {
		struct xfs_qmops *ops;

		ops = symbol_get(xfs_qmcore_xfs);
		if (!ops) {
			request_module("xfs_quota");
			ops = symbol_get(xfs_qmcore_xfs);
		}

		if (!ops) {
			cmn_err(CE_WARN, "XFS: no quota support available.");
			return EINVAL;
		}
		mp->m_qm_ops = ops;
	} else {
		mp->m_qm_ops = &xfs_qmcore_stub;
	}

	return 0;
}

void
xfs_qmops_put(struct xfs_mount *mp)
{
	if (mp->m_qm_ops != &xfs_qmcore_stub)
		symbol_put(xfs_qmcore_xfs);
}