[linux-2.6-block.git] / fs / xfs / quota / xfs_qm_bhv.c

/*
 * 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 version 2 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.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.	 Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */

#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_clnt.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_alloc.h"
#include "xfs_dmapi.h"
#include "xfs_quota.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_ialloc.h"
#include "xfs_itable.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_rtalloc.h"
#include "xfs_error.h"
#include "xfs_rw.h"
#include "xfs_acl.h"
#include "xfs_cap.h"
#include "xfs_mac.h"
#include "xfs_attr.h"
#include "xfs_buf_item.h"
#include "xfs_qm.h"

#define MNTOPT_QUOTA	"quota"		/* disk quotas (user) */
#define MNTOPT_NOQUOTA	"noquota"	/* no quotas */
#define MNTOPT_USRQUOTA	"usrquota"	/* user quota enabled */
#define MNTOPT_GRPQUOTA	"grpquota"	/* group quota enabled */
#define MNTOPT_PRJQUOTA	"prjquota"	/* project quota enabled */
#define MNTOPT_UQUOTA	"uquota"	/* user quota (IRIX variant) */
#define MNTOPT_GQUOTA	"gquota"	/* group quota (IRIX variant) */
#define MNTOPT_PQUOTA	"pquota"	/* project quota (IRIX variant) */
#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
#define MNTOPT_QUOTANOENF  "qnoenforce"	/* same as uqnoenforce */

STATIC int
xfs_qm_parseargs(
	struct bhv_desc		*bhv,
	char			*options,
	struct xfs_mount_args	*args,
	int			update)
{
	size_t			length;
	char			*local_options = options;
	char			*this_char;
	int			error;
	int			referenced = update;

	while ((this_char = strsep(&local_options, ",")) != NULL) {
		length = strlen(this_char);
		if (local_options)
			length++;

		if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
			args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
			args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
			referenced = update;
		} else if (!strcmp(this_char, MNTOPT_QUOTA) ||
			   !strcmp(this_char, MNTOPT_UQUOTA) ||
			   !strcmp(this_char, MNTOPT_USRQUOTA)) {
			args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
			referenced = 1;
		} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
			   !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
			args->flags |= XFSMNT_UQUOTA;
			args->flags &= ~XFSMNT_UQUOTAENF;
			referenced = 1;
		} else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
			   !strcmp(this_char, MNTOPT_PRJQUOTA)) {
			args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
			referenced = 1;
		} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
			args->flags |= XFSMNT_PQUOTA;
			args->flags &= ~XFSMNT_PQUOTAENF;
			referenced = 1;
		} else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
			   !strcmp(this_char, MNTOPT_GRPQUOTA)) {
			args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
			referenced = 1;
		} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
			args->flags |= XFSMNT_GQUOTA;
			args->flags &= ~XFSMNT_GQUOTAENF;
			referenced = 1;
		} else {
			if (local_options)
				*(local_options-1) = ',';
			continue;
		}

		while (length--)
			*this_char++ = ',';
	}

	if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
		cmn_err(CE_WARN,
			"XFS: cannot mount with both project and group quota");
		return XFS_ERROR(EINVAL);
	}

	PVFS_PARSEARGS(BHV_NEXT(bhv), options, args, update, error);
	if (!error && !referenced)
		bhv_remove_vfsops(bhvtovfs(bhv), VFS_POSITION_QM);
	return error;
}

STATIC int
xfs_qm_showargs(
	struct bhv_desc		*bhv,
	struct seq_file		*m)
{
	struct vfs		*vfsp = bhvtovfs(bhv);
	struct xfs_mount	*mp = XFS_VFSTOM(vfsp);
	int			error;

	if (mp->m_qflags & XFS_UQUOTA_ACCT) {
		(mp->m_qflags & XFS_UQUOTA_ENFD) ?
			seq_puts(m, "," MNTOPT_USRQUOTA) :
			seq_puts(m, "," MNTOPT_UQUOTANOENF);
	}

	if (mp->m_qflags & XFS_PQUOTA_ACCT) {
		(mp->m_qflags & XFS_OQUOTA_ENFD) ?
			seq_puts(m, "," MNTOPT_PRJQUOTA) :
			seq_puts(m, "," MNTOPT_PQUOTANOENF);
	}

	if (mp->m_qflags & XFS_GQUOTA_ACCT) {
		(mp->m_qflags & XFS_OQUOTA_ENFD) ?
			seq_puts(m, "," MNTOPT_GRPQUOTA) :
			seq_puts(m, "," MNTOPT_GQUOTANOENF);
	}

	if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
		seq_puts(m, "," MNTOPT_NOQUOTA);

	PVFS_SHOWARGS(BHV_NEXT(bhv), m, error);
	return error;
}

STATIC int
xfs_qm_mount(
	struct bhv_desc		*bhv,
	struct xfs_mount_args	*args,
	struct cred		*cr)
{
	struct vfs		*vfsp = bhvtovfs(bhv);
	struct xfs_mount	*mp = XFS_VFSTOM(vfsp);
	int			error;

	if (args->flags & (XFSMNT_UQUOTA | XFSMNT_GQUOTA | XFSMNT_PQUOTA))
		xfs_qm_mount_quotainit(mp, args->flags);
	PVFS_MOUNT(BHV_NEXT(bhv), args, cr, error);
	return error;
}

STATIC int
xfs_qm_syncall(
	struct bhv_desc		*bhv,
	int			flags,
	cred_t			*credp)
{
	struct vfs		*vfsp = bhvtovfs(bhv);
	struct xfs_mount	*mp = XFS_VFSTOM(vfsp);
	int			error;

	/*
	 * Get the Quota Manager to flush the dquots.
	 */
	if (XFS_IS_QUOTA_ON(mp)) {
		if ((error = xfs_qm_sync(mp, flags))) {
			/*
			 * If we got an IO error, we will be shutting down.
			 * So, there's nothing more for us to do here.
			 */
			ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
			if (XFS_FORCED_SHUTDOWN(mp)) {
				return XFS_ERROR(error);
			}
		}
	}
	PVFS_SYNC(BHV_NEXT(bhv), flags, credp, error);
	return error;
}

STATIC int
xfs_qm_newmount(
	xfs_mount_t	*mp,
	uint		*needquotamount,
	uint		*quotaflags)
{
	uint		quotaondisk;
	uint		uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;

	*quotaflags = 0;
	*needquotamount = B_FALSE;

	quotaondisk = XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
				(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);

	if (quotaondisk) {
		uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
		pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
		gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
	}

	/*
	 * If the device itself is read-only, we can't allow
	 * the user to change the state of quota on the mount -
	 * this would generate a transaction on the ro device,
	 * which would lead to an I/O error and shutdown
	 */

	if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
	    (!uquotaondisk &&  XFS_IS_UQUOTA_ON(mp)) ||
	     (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
	    (!pquotaondisk &&  XFS_IS_PQUOTA_ON(mp)) ||
	     (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
	    (!gquotaondisk &&  XFS_IS_OQUOTA_ON(mp)))  &&
	    xfs_dev_is_read_only(mp, "changing quota state")) {
		cmn_err(CE_WARN,
			"XFS: please mount with%s%s%s%s.",
			(!quotaondisk ? "out quota" : ""),
			(uquotaondisk ? " usrquota" : ""),
			(pquotaondisk ? " prjquota" : ""),
			(gquotaondisk ? " grpquota" : ""));
		return XFS_ERROR(EPERM);
	}

	if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
		/*
		 * Call mount_quotas at this point only if we won't have to do
		 * a quotacheck.
		 */
		if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
			/*
			 * If an error occured, qm_mount_quotas code
			 * has already disabled quotas. So, just finish
			 * mounting, and get on with the boring life
			 * without disk quotas.
			 */
			xfs_qm_mount_quotas(mp, 0);
		} else {
			/*
			 * Clear the quota flags, but remember them. This
			 * is so that the quota code doesn't get invoked
			 * before we're ready. This can happen when an
			 * inode goes inactive and wants to free blocks,
			 * or via xfs_log_mount_finish.
			 */
			*needquotamount = B_TRUE;
			*quotaflags = mp->m_qflags;
			mp->m_qflags = 0;
		}
	}

	return 0;
}

STATIC int
xfs_qm_endmount(
	xfs_mount_t	*mp,
	uint		needquotamount,
	uint		quotaflags,
	int		mfsi_flags)
{
	if (needquotamount) {
		ASSERT(mp->m_qflags == 0);
		mp->m_qflags = quotaflags;
		xfs_qm_mount_quotas(mp, mfsi_flags);
	}

#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
	if (! (XFS_IS_QUOTA_ON(mp)))
		xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
	else
		xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
#endif

#ifdef QUOTADEBUG
	if (XFS_IS_QUOTA_ON(mp) && xfs_qm_internalqcheck(mp))
		cmn_err(CE_WARN, "XFS: mount internalqcheck failed");
#endif

	return 0;
}

STATIC void
xfs_qm_dqrele_null(
	xfs_dquot_t	*dq)
{
	/*
	 * Called from XFS, where we always check first for a NULL dquot.
	 */
	if (!dq)
		return;
	xfs_qm_dqrele(dq);
}


STATIC struct xfs_qmops xfs_qmcore_xfs = {
	.xfs_qminit		= xfs_qm_newmount,
	.xfs_qmdone		= xfs_qm_unmount_quotadestroy,
	.xfs_qmmount		= xfs_qm_endmount,
	.xfs_qmunmount		= xfs_qm_unmount_quotas,
	.xfs_dqrele		= xfs_qm_dqrele_null,
	.xfs_dqattach		= xfs_qm_dqattach,
	.xfs_dqdetach		= xfs_qm_dqdetach,
	.xfs_dqpurgeall		= xfs_qm_dqpurge_all,
	.xfs_dqvopalloc		= xfs_qm_vop_dqalloc,
	.xfs_dqvopcreate	= xfs_qm_vop_dqattach_and_dqmod_newinode,
	.xfs_dqvoprename	= xfs_qm_vop_rename_dqattach,
	.xfs_dqvopchown		= xfs_qm_vop_chown,
	.xfs_dqvopchownresv	= xfs_qm_vop_chown_reserve,
	.xfs_dqtrxops		= &xfs_trans_dquot_ops,
};

struct bhv_vfsops xfs_qmops = { {
	BHV_IDENTITY_INIT(VFS_BHV_QM, VFS_POSITION_QM),
	.vfs_parseargs		= xfs_qm_parseargs,
	.vfs_showargs		= xfs_qm_showargs,
	.vfs_mount		= xfs_qm_mount,
	.vfs_sync		= xfs_qm_syncall,
	.vfs_quotactl		= xfs_qm_quotactl, },
};


void __init
xfs_qm_init(void)
{
	static char	message[] __initdata =
		KERN_INFO "SGI XFS Quota Management subsystem\n";

	printk(message);
	mutex_init(&xfs_Gqm_lock, MUTEX_DEFAULT, "xfs_qmlock");
	vfs_bhv_set_custom(&xfs_qmops, &xfs_qmcore_xfs);
	xfs_qm_init_procfs();
}

void __exit
xfs_qm_exit(void)
{
	vfs_bhv_clr_custom(&xfs_qmops);
	xfs_qm_cleanup_procfs();
	if (qm_dqzone)
		kmem_cache_destroy(qm_dqzone);
	if (qm_dqtrxzone)
		kmem_cache_destroy(qm_dqtrxzone);
}
Commit	Line	Data
1da177e4	1	/*
4cd4a034	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc. All Rights Reserved.
1da177e4 LT	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of version 2 of the GNU General Public License as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it would be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	11	*
	12	* Further, this software is distributed without any warranty that it is
	13	* free of the rightful claim of any third person regarding infringement
	14	* or the like. Any license provided herein, whether implied or
	15	* otherwise, applies only to this software file. Patent licenses, if
	16	* any, provided herein do not apply to combinations of this program with
	17	* other software, or any other product whatsoever.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write the Free Software Foundation, Inc., 59
	21	* Temple Place - Suite 330, Boston MA 02111-1307, USA.
	22	*
	23	* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
	24	* Mountain View, CA 94043, or:
	25	*
	26	* http://www.sgi.com
	27	*
	28	* For further information regarding this notice, see:
	29	*
	30	* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
	31	*/
	32
	33	#include "xfs.h"
	34	#include "xfs_fs.h"
a844f451	35	#include "xfs_bit.h"
1da177e4	36	#include "xfs_log.h"
a844f451	37	#include "xfs_inum.h"
1da177e4 LT	38	#include "xfs_clnt.h"
	39	#include "xfs_trans.h"
	40	#include "xfs_sb.h"
a844f451	41	#include "xfs_ag.h"
1da177e4 LT	42	#include "xfs_dir.h"
	43	#include "xfs_dir2.h"
	44	#include "xfs_alloc.h"
	45	#include "xfs_dmapi.h"
	46	#include "xfs_quota.h"
	47	#include "xfs_mount.h"
1da177e4	48	#include "xfs_bmap_btree.h"
a844f451	49	#include "xfs_alloc_btree.h"
1da177e4	50	#include "xfs_ialloc_btree.h"
1da177e4 LT	51	#include "xfs_dir_sf.h"
1da177e4 LT	52	#include "xfs_dir2_sf.h"
a844f451	53	#include "xfs_attr_sf.h"
1da177e4 LT	54	#include "xfs_dinode.h"
1da177e4 LT	55	#include "xfs_inode.h"
a844f451 NS	56	#include "xfs_ialloc.h"
	57	#include "xfs_itable.h"
	58	#include "xfs_btree.h"
1da177e4	59	#include "xfs_bmap.h"
1da177e4 LT	60	#include "xfs_rtalloc.h"
1da177e4 LT	61	#include "xfs_error.h"
1da177e4 LT	62	#include "xfs_rw.h"
	63	#include "xfs_acl.h"
	64	#include "xfs_cap.h"
	65	#include "xfs_mac.h"
	66	#include "xfs_attr.h"
	67	#include "xfs_buf_item.h"
1da177e4 LT	68	#include "xfs_qm.h"
	69
	70	#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
	71	#define MNTOPT_NOQUOTA "noquota" /* no quotas */
	72	#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
	73	#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
c8ad20ff	74	#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
1da177e4 LT	75	#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
1da177e4 LT	76	#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
c8ad20ff	77	#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
1da177e4 LT	78	#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
1da177e4 LT	79	#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
c8ad20ff	80	#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
1da177e4 LT	81	#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
	82
	83	STATIC int
	84	xfs_qm_parseargs(
	85	struct bhv_desc *bhv,
	86	char *options,
	87	struct xfs_mount_args *args,
	88	int update)
	89	{
	90	size_t length;
	91	char *local_options = options;
	92	char *this_char;
	93	int error;
	94	int referenced = update;
	95
	96	while ((this_char = strsep(&local_options, ",")) != NULL) {
	97	length = strlen(this_char);
	98	if (local_options)
	99	length++;
	100
	101	if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
	102	args->flags &= ~(XFSMNT_UQUOTAENF\|XFSMNT_UQUOTA);
	103	args->flags &= ~(XFSMNT_GQUOTAENF\|XFSMNT_GQUOTA);
	104	referenced = update;
	105	} else if (!strcmp(this_char, MNTOPT_QUOTA) \|\|
	106	!strcmp(this_char, MNTOPT_UQUOTA) \|\|
	107	!strcmp(this_char, MNTOPT_USRQUOTA)) {
	108	args->flags \|= XFSMNT_UQUOTA \| XFSMNT_UQUOTAENF;
	109	referenced = 1;
	110	} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) \|\|
	111	!strcmp(this_char, MNTOPT_UQUOTANOENF)) {
	112	args->flags \|= XFSMNT_UQUOTA;
	113	args->flags &= ~XFSMNT_UQUOTAENF;
	114	referenced = 1;
c8ad20ff NS	115	} else if (!strcmp(this_char, MNTOPT_PQUOTA) \|\|
	116	!strcmp(this_char, MNTOPT_PRJQUOTA)) {
	117	args->flags \|= XFSMNT_PQUOTA \| XFSMNT_PQUOTAENF;
	118	referenced = 1;
	119	} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
	120	args->flags \|= XFSMNT_PQUOTA;
	121	args->flags &= ~XFSMNT_PQUOTAENF;
	122	referenced = 1;
1da177e4 LT	123	} else if (!strcmp(this_char, MNTOPT_GQUOTA) \|\|
	124	!strcmp(this_char, MNTOPT_GRPQUOTA)) {
	125	args->flags \|= XFSMNT_GQUOTA \| XFSMNT_GQUOTAENF;
	126	referenced = 1;
	127	} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
	128	args->flags \|= XFSMNT_GQUOTA;
	129	args->flags &= ~XFSMNT_GQUOTAENF;
	130	referenced = 1;
	131	} else {
	132	if (local_options)
	133	*(local_options-1) = ',';
	134	continue;
	135	}
	136
	137	while (length--)
	138	*this_char++ = ',';
	139	}
	140
c8ad20ff NS	141	if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
	142	cmn_err(CE_WARN,
	143	"XFS: cannot mount with both project and group quota");
	144	return XFS_ERROR(EINVAL);
	145	}
	146
1da177e4 LT	147	PVFS_PARSEARGS(BHV_NEXT(bhv), options, args, update, error);
	148	if (!error && !referenced)
	149	bhv_remove_vfsops(bhvtovfs(bhv), VFS_POSITION_QM);
	150	return error;
	151	}
	152
	153	STATIC int
	154	xfs_qm_showargs(
	155	struct bhv_desc *bhv,
	156	struct seq_file *m)
	157	{
	158	struct vfs *vfsp = bhvtovfs(bhv);
	159	struct xfs_mount *mp = XFS_VFSTOM(vfsp);
	160	int error;
	161
	162	if (mp->m_qflags & XFS_UQUOTA_ACCT) {
	163	(mp->m_qflags & XFS_UQUOTA_ENFD) ?
	164	seq_puts(m, "," MNTOPT_USRQUOTA) :
	165	seq_puts(m, "," MNTOPT_UQUOTANOENF);
	166	}
	167
c8ad20ff NS	168	if (mp->m_qflags & XFS_PQUOTA_ACCT) {
	169	(mp->m_qflags & XFS_OQUOTA_ENFD) ?
	170	seq_puts(m, "," MNTOPT_PRJQUOTA) :
	171	seq_puts(m, "," MNTOPT_PQUOTANOENF);
	172	}
	173
1da177e4	174	if (mp->m_qflags & XFS_GQUOTA_ACCT) {
c8ad20ff	175	(mp->m_qflags & XFS_OQUOTA_ENFD) ?
1da177e4 LT	176	seq_puts(m, "," MNTOPT_GRPQUOTA) :
	177	seq_puts(m, "," MNTOPT_GQUOTANOENF);
	178	}
	179
c8ad20ff	180	if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
1da177e4 LT	181	seq_puts(m, "," MNTOPT_NOQUOTA);
	182
	183	PVFS_SHOWARGS(BHV_NEXT(bhv), m, error);
	184	return error;
	185	}
	186
	187	STATIC int
	188	xfs_qm_mount(
	189	struct bhv_desc *bhv,
	190	struct xfs_mount_args *args,
	191	struct cred *cr)
	192	{
	193	struct vfs *vfsp = bhvtovfs(bhv);
	194	struct xfs_mount *mp = XFS_VFSTOM(vfsp);
	195	int error;
	196
c8ad20ff	197	if (args->flags & (XFSMNT_UQUOTA \| XFSMNT_GQUOTA \| XFSMNT_PQUOTA))
1da177e4 LT	198	xfs_qm_mount_quotainit(mp, args->flags);
	199	PVFS_MOUNT(BHV_NEXT(bhv), args, cr, error);
	200	return error;
	201	}
	202
	203	STATIC int
	204	xfs_qm_syncall(
	205	struct bhv_desc *bhv,
	206	int flags,
	207	cred_t *credp)
	208	{
	209	struct vfs *vfsp = bhvtovfs(bhv);
	210	struct xfs_mount *mp = XFS_VFSTOM(vfsp);
	211	int error;
	212
	213	/*
	214	* Get the Quota Manager to flush the dquots.
	215	*/
	216	if (XFS_IS_QUOTA_ON(mp)) {
	217	if ((error = xfs_qm_sync(mp, flags))) {
	218	/*
	219	* If we got an IO error, we will be shutting down.
	220	* So, there's nothing more for us to do here.
	221	*/
	222	ASSERT(error != EIO \|\| XFS_FORCED_SHUTDOWN(mp));
	223	if (XFS_FORCED_SHUTDOWN(mp)) {
	224	return XFS_ERROR(error);
	225	}
	226	}
	227	}
	228	PVFS_SYNC(BHV_NEXT(bhv), flags, credp, error);
	229	return error;
	230	}
	231
1da177e4 LT	232	STATIC int
	233	xfs_qm_newmount(
	234	xfs_mount_t *mp,
	235	uint *needquotamount,
	236	uint *quotaflags)
	237	{
	238	uint quotaondisk;
c8ad20ff	239	uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
1da177e4 LT	240
	241	*quotaflags = 0;
	242	*needquotamount = B_FALSE;
	243
	244	quotaondisk = XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
c8ad20ff	245	(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
1da177e4 LT	246
	247	if (quotaondisk) {
	248	uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
c8ad20ff	249	pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
1da177e4 LT	250	gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
	251	}
	252
	253	/*
	254	* If the device itself is read-only, we can't allow
	255	* the user to change the state of quota on the mount -
	256	* this would generate a transaction on the ro device,
	257	* which would lead to an I/O error and shutdown
	258	*/
	259
	260	if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) \|\|
	261	(!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) \|\|
c8ad20ff NS	262	(pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) \|\|
c8ad20ff NS	263	(!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) \|\|
1da177e4	264	(gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) \|\|
c8ad20ff	265	(!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
1da177e4 LT	266	xfs_dev_is_read_only(mp, "changing quota state")) {
1da177e4 LT	267	cmn_err(CE_WARN,
c8ad20ff	268	"XFS: please mount with%s%s%s%s.",
1da177e4 LT	269	(!quotaondisk ? "out quota" : ""),
1da177e4 LT	270	(uquotaondisk ? " usrquota" : ""),
c8ad20ff	271	(pquotaondisk ? " prjquota" : ""),
1da177e4 LT	272	(gquotaondisk ? " grpquota" : ""));
	273	return XFS_ERROR(EPERM);
	274	}
	275
	276	if (XFS_IS_QUOTA_ON(mp) \|\| quotaondisk) {
	277	/*
	278	* Call mount_quotas at this point only if we won't have to do
	279	* a quotacheck.
	280	*/
	281	if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
	282	/*
	283	* If an error occured, qm_mount_quotas code
	284	* has already disabled quotas. So, just finish
	285	* mounting, and get on with the boring life
	286	* without disk quotas.
	287	*/
	288	xfs_qm_mount_quotas(mp, 0);
	289	} else {
	290	/*
	291	* Clear the quota flags, but remember them. This
	292	* is so that the quota code doesn't get invoked
	293	* before we're ready. This can happen when an
	294	* inode goes inactive and wants to free blocks,
	295	* or via xfs_log_mount_finish.
	296	*/
	297	*needquotamount = B_TRUE;
	298	*quotaflags = mp->m_qflags;
	299	mp->m_qflags = 0;
	300	}
	301	}
	302
	303	return 0;
	304	}
	305
	306	STATIC int
	307	xfs_qm_endmount(
	308	xfs_mount_t *mp,
	309	uint needquotamount,
	310	uint quotaflags,
	311	int mfsi_flags)
	312	{
	313	if (needquotamount) {
	314	ASSERT(mp->m_qflags == 0);
	315	mp->m_qflags = quotaflags;
	316	xfs_qm_mount_quotas(mp, mfsi_flags);
	317	}
	318
	319	#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
	320	if (! (XFS_IS_QUOTA_ON(mp)))
	321	xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
	322	else
	323	xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
	324	#endif
	325
	326	#ifdef QUOTADEBUG
	327	if (XFS_IS_QUOTA_ON(mp) && xfs_qm_internalqcheck(mp))
	328	cmn_err(CE_WARN, "XFS: mount internalqcheck failed");
	329	#endif
	330
	331	return 0;
	332	}
	333
	334	STATIC void
	335	xfs_qm_dqrele_null(
336	xfs_dquot_t *dq)
337	{
338	/*
339	* Called from XFS, where we always check first for a NULL dquot.
340	*/
341	if (!dq)
342	return;
343	xfs_qm_dqrele(dq);
344	}
345
346
ba0f32d4	347	STATIC struct xfs_qmops xfs_qmcore_xfs = {
1da177e4 LT	348	.xfs_qminit = xfs_qm_newmount,
	349	.xfs_qmdone = xfs_qm_unmount_quotadestroy,
	350	.xfs_qmmount = xfs_qm_endmount,
	351	.xfs_qmunmount = xfs_qm_unmount_quotas,
	352	.xfs_dqrele = xfs_qm_dqrele_null,
	353	.xfs_dqattach = xfs_qm_dqattach,
	354	.xfs_dqdetach = xfs_qm_dqdetach,
	355	.xfs_dqpurgeall = xfs_qm_dqpurge_all,
	356	.xfs_dqvopalloc = xfs_qm_vop_dqalloc,
	357	.xfs_dqvopcreate = xfs_qm_vop_dqattach_and_dqmod_newinode,
	358	.xfs_dqvoprename = xfs_qm_vop_rename_dqattach,
	359	.xfs_dqvopchown = xfs_qm_vop_chown,
	360	.xfs_dqvopchownresv = xfs_qm_vop_chown_reserve,
	361	.xfs_dqtrxops = &xfs_trans_dquot_ops,
	362	};
	363
	364	struct bhv_vfsops xfs_qmops = { {
	365	BHV_IDENTITY_INIT(VFS_BHV_QM, VFS_POSITION_QM),
	366	.vfs_parseargs = xfs_qm_parseargs,
	367	.vfs_showargs = xfs_qm_showargs,
	368	.vfs_mount = xfs_qm_mount,
	369	.vfs_sync = xfs_qm_syncall,
	370	.vfs_quotactl = xfs_qm_quotactl, },
	371	};
	372
	373
	374	void __init
	375	xfs_qm_init(void)
	376	{
	377	static char message[] __initdata =
	378	KERN_INFO "SGI XFS Quota Management subsystem\n";
	379
	380	printk(message);
	381	mutex_init(&xfs_Gqm_lock, MUTEX_DEFAULT, "xfs_qmlock");
	382	vfs_bhv_set_custom(&xfs_qmops, &xfs_qmcore_xfs);
	383	xfs_qm_init_procfs();
	384	}
	385
	386	void __exit
	387	xfs_qm_exit(void)
	388	{
	389	vfs_bhv_clr_custom(&xfs_qmops);
	390	xfs_qm_cleanup_procfs();
	391	if (qm_dqzone)
	392	kmem_cache_destroy(qm_dqzone);
	393	if (qm_dqtrxzone)
	394	kmem_cache_destroy(qm_dqtrxzone);
	395	}