[deliverable/linux.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 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_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);
	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	/*
4ce3121f NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
4ce3121f NS	3	* All Rights Reserved.
1da177e4	4	*
4ce3121f NS	5	* This program is free software; you can redistribute it and/or
4ce3121f NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
4ce3121f NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
4ce3121f NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4	17	*/
1da177e4 LT	18	#include "xfs.h"
1da177e4 LT	19	#include "xfs_fs.h"
a844f451	20	#include "xfs_bit.h"
1da177e4	21	#include "xfs_log.h"
a844f451	22	#include "xfs_inum.h"
1da177e4 LT	23	#include "xfs_clnt.h"
	24	#include "xfs_trans.h"
	25	#include "xfs_sb.h"
a844f451	26	#include "xfs_ag.h"
1da177e4 LT	27	#include "xfs_dir.h"
	28	#include "xfs_dir2.h"
	29	#include "xfs_alloc.h"
	30	#include "xfs_dmapi.h"
	31	#include "xfs_quota.h"
	32	#include "xfs_mount.h"
1da177e4	33	#include "xfs_bmap_btree.h"
a844f451	34	#include "xfs_alloc_btree.h"
1da177e4	35	#include "xfs_ialloc_btree.h"
1da177e4 LT	36	#include "xfs_dir_sf.h"
1da177e4 LT	37	#include "xfs_dir2_sf.h"
a844f451	38	#include "xfs_attr_sf.h"
1da177e4 LT	39	#include "xfs_dinode.h"
1da177e4 LT	40	#include "xfs_inode.h"
a844f451 NS	41	#include "xfs_ialloc.h"
	42	#include "xfs_itable.h"
	43	#include "xfs_btree.h"
1da177e4	44	#include "xfs_bmap.h"
1da177e4 LT	45	#include "xfs_rtalloc.h"
1da177e4 LT	46	#include "xfs_error.h"
1da177e4 LT	47	#include "xfs_rw.h"
	48	#include "xfs_acl.h"
	49	#include "xfs_cap.h"
	50	#include "xfs_mac.h"
	51	#include "xfs_attr.h"
	52	#include "xfs_buf_item.h"
1da177e4 LT	53	#include "xfs_qm.h"
	54
	55	#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
	56	#define MNTOPT_NOQUOTA "noquota" /* no quotas */
	57	#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
	58	#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
c8ad20ff	59	#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
1da177e4 LT	60	#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
1da177e4 LT	61	#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
c8ad20ff	62	#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
1da177e4 LT	63	#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
1da177e4 LT	64	#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
c8ad20ff	65	#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
1da177e4 LT	66	#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
	67
	68	STATIC int
	69	xfs_qm_parseargs(
	70	struct bhv_desc *bhv,
	71	char *options,
	72	struct xfs_mount_args *args,
	73	int update)
	74	{
	75	size_t length;
	76	char *local_options = options;
	77	char *this_char;
	78	int error;
	79	int referenced = update;
	80
	81	while ((this_char = strsep(&local_options, ",")) != NULL) {
	82	length = strlen(this_char);
	83	if (local_options)
	84	length++;
	85
	86	if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
	87	args->flags &= ~(XFSMNT_UQUOTAENF\|XFSMNT_UQUOTA);
	88	args->flags &= ~(XFSMNT_GQUOTAENF\|XFSMNT_GQUOTA);
	89	referenced = update;
	90	} else if (!strcmp(this_char, MNTOPT_QUOTA) \|\|
	91	!strcmp(this_char, MNTOPT_UQUOTA) \|\|
	92	!strcmp(this_char, MNTOPT_USRQUOTA)) {
	93	args->flags \|= XFSMNT_UQUOTA \| XFSMNT_UQUOTAENF;
	94	referenced = 1;
	95	} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) \|\|
	96	!strcmp(this_char, MNTOPT_UQUOTANOENF)) {
	97	args->flags \|= XFSMNT_UQUOTA;
	98	args->flags &= ~XFSMNT_UQUOTAENF;
	99	referenced = 1;
c8ad20ff NS	100	} else if (!strcmp(this_char, MNTOPT_PQUOTA) \|\|
	101	!strcmp(this_char, MNTOPT_PRJQUOTA)) {
	102	args->flags \|= XFSMNT_PQUOTA \| XFSMNT_PQUOTAENF;
	103	referenced = 1;
	104	} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
	105	args->flags \|= XFSMNT_PQUOTA;
	106	args->flags &= ~XFSMNT_PQUOTAENF;
	107	referenced = 1;
1da177e4 LT	108	} else if (!strcmp(this_char, MNTOPT_GQUOTA) \|\|
	109	!strcmp(this_char, MNTOPT_GRPQUOTA)) {
	110	args->flags \|= XFSMNT_GQUOTA \| XFSMNT_GQUOTAENF;
	111	referenced = 1;
	112	} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
	113	args->flags \|= XFSMNT_GQUOTA;
	114	args->flags &= ~XFSMNT_GQUOTAENF;
	115	referenced = 1;
	116	} else {
	117	if (local_options)
	118	*(local_options-1) = ',';
	119	continue;
	120	}
	121
	122	while (length--)
	123	*this_char++ = ',';
	124	}
	125
c8ad20ff NS	126	if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
	127	cmn_err(CE_WARN,
	128	"XFS: cannot mount with both project and group quota");
	129	return XFS_ERROR(EINVAL);
	130	}
	131
1da177e4 LT	132	PVFS_PARSEARGS(BHV_NEXT(bhv), options, args, update, error);
	133	if (!error && !referenced)
	134	bhv_remove_vfsops(bhvtovfs(bhv), VFS_POSITION_QM);
	135	return error;
	136	}
	137
	138	STATIC int
	139	xfs_qm_showargs(
	140	struct bhv_desc *bhv,
	141	struct seq_file *m)
	142	{
	143	struct vfs *vfsp = bhvtovfs(bhv);
	144	struct xfs_mount *mp = XFS_VFSTOM(vfsp);
	145	int error;
	146
	147	if (mp->m_qflags & XFS_UQUOTA_ACCT) {
	148	(mp->m_qflags & XFS_UQUOTA_ENFD) ?
	149	seq_puts(m, "," MNTOPT_USRQUOTA) :
	150	seq_puts(m, "," MNTOPT_UQUOTANOENF);
	151	}
	152
c8ad20ff NS	153	if (mp->m_qflags & XFS_PQUOTA_ACCT) {
	154	(mp->m_qflags & XFS_OQUOTA_ENFD) ?
	155	seq_puts(m, "," MNTOPT_PRJQUOTA) :
	156	seq_puts(m, "," MNTOPT_PQUOTANOENF);
	157	}
	158
1da177e4	159	if (mp->m_qflags & XFS_GQUOTA_ACCT) {
c8ad20ff	160	(mp->m_qflags & XFS_OQUOTA_ENFD) ?
1da177e4 LT	161	seq_puts(m, "," MNTOPT_GRPQUOTA) :
	162	seq_puts(m, "," MNTOPT_GQUOTANOENF);
	163	}
	164
c8ad20ff	165	if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
1da177e4 LT	166	seq_puts(m, "," MNTOPT_NOQUOTA);
	167
	168	PVFS_SHOWARGS(BHV_NEXT(bhv), m, error);
	169	return error;
	170	}
	171
	172	STATIC int
	173	xfs_qm_mount(
	174	struct bhv_desc *bhv,
	175	struct xfs_mount_args *args,
	176	struct cred *cr)
	177	{
	178	struct vfs *vfsp = bhvtovfs(bhv);
	179	struct xfs_mount *mp = XFS_VFSTOM(vfsp);
	180	int error;
	181
c8ad20ff	182	if (args->flags & (XFSMNT_UQUOTA \| XFSMNT_GQUOTA \| XFSMNT_PQUOTA))
1da177e4 LT	183	xfs_qm_mount_quotainit(mp, args->flags);
	184	PVFS_MOUNT(BHV_NEXT(bhv), args, cr, error);
	185	return error;
	186	}
	187
	188	STATIC int
	189	xfs_qm_syncall(
	190	struct bhv_desc *bhv,
	191	int flags,
	192	cred_t *credp)
	193	{
	194	struct vfs *vfsp = bhvtovfs(bhv);
	195	struct xfs_mount *mp = XFS_VFSTOM(vfsp);
	196	int error;
	197
	198	/*
	199	* Get the Quota Manager to flush the dquots.
	200	*/
	201	if (XFS_IS_QUOTA_ON(mp)) {
	202	if ((error = xfs_qm_sync(mp, flags))) {
	203	/*
	204	* If we got an IO error, we will be shutting down.
	205	* So, there's nothing more for us to do here.
	206	*/
	207	ASSERT(error != EIO \|\| XFS_FORCED_SHUTDOWN(mp));
	208	if (XFS_FORCED_SHUTDOWN(mp)) {
	209	return XFS_ERROR(error);
	210	}
	211	}
	212	}
	213	PVFS_SYNC(BHV_NEXT(bhv), flags, credp, error);
	214	return error;
	215	}
	216
1da177e4 LT	217	STATIC int
	218	xfs_qm_newmount(
	219	xfs_mount_t *mp,
	220	uint *needquotamount,
	221	uint *quotaflags)
	222	{
	223	uint quotaondisk;
c8ad20ff	224	uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
1da177e4 LT	225
	226	*quotaflags = 0;
	227	*needquotamount = B_FALSE;
	228
	229	quotaondisk = XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
c8ad20ff	230	(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
1da177e4 LT	231
	232	if (quotaondisk) {
	233	uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
c8ad20ff	234	pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
1da177e4 LT	235	gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
	236	}
	237
	238	/*
	239	* If the device itself is read-only, we can't allow
	240	* the user to change the state of quota on the mount -
	241	* this would generate a transaction on the ro device,
	242	* which would lead to an I/O error and shutdown
	243	*/
	244
	245	if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) \|\|
	246	(!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) \|\|
c8ad20ff NS	247	(pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) \|\|
c8ad20ff NS	248	(!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) \|\|
1da177e4	249	(gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) \|\|
c8ad20ff	250	(!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
1da177e4 LT	251	xfs_dev_is_read_only(mp, "changing quota state")) {
1da177e4 LT	252	cmn_err(CE_WARN,
c8ad20ff	253	"XFS: please mount with%s%s%s%s.",
1da177e4 LT	254	(!quotaondisk ? "out quota" : ""),
1da177e4 LT	255	(uquotaondisk ? " usrquota" : ""),
c8ad20ff	256	(pquotaondisk ? " prjquota" : ""),
1da177e4 LT	257	(gquotaondisk ? " grpquota" : ""));
	258	return XFS_ERROR(EPERM);
	259	}
	260
	261	if (XFS_IS_QUOTA_ON(mp) \|\| quotaondisk) {
	262	/*
	263	* Call mount_quotas at this point only if we won't have to do
	264	* a quotacheck.
	265	*/
	266	if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
	267	/*
	268	* If an error occured, qm_mount_quotas code
	269	* has already disabled quotas. So, just finish
	270	* mounting, and get on with the boring life
	271	* without disk quotas.
	272	*/
	273	xfs_qm_mount_quotas(mp, 0);
	274	} else {
	275	/*
	276	* Clear the quota flags, but remember them. This
	277	* is so that the quota code doesn't get invoked
	278	* before we're ready. This can happen when an
	279	* inode goes inactive and wants to free blocks,
	280	* or via xfs_log_mount_finish.
	281	*/
	282	*needquotamount = B_TRUE;
	283	*quotaflags = mp->m_qflags;
	284	mp->m_qflags = 0;
	285	}
	286	}
	287
	288	return 0;
	289	}
	290
	291	STATIC int
	292	xfs_qm_endmount(
	293	xfs_mount_t *mp,
	294	uint needquotamount,
	295	uint quotaflags,
	296	int mfsi_flags)
	297	{
	298	if (needquotamount) {
	299	ASSERT(mp->m_qflags == 0);
	300	mp->m_qflags = quotaflags;
	301	xfs_qm_mount_quotas(mp, mfsi_flags);
	302	}
	303
	304	#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
	305	if (! (XFS_IS_QUOTA_ON(mp)))
	306	xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
	307	else
	308	xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
	309	#endif
	310
	311	#ifdef QUOTADEBUG
	312	if (XFS_IS_QUOTA_ON(mp) && xfs_qm_internalqcheck(mp))
	313	cmn_err(CE_WARN, "XFS: mount internalqcheck failed");
	314	#endif
	315
	316	return 0;
	317	}
	318
	319	STATIC void
	320	xfs_qm_dqrele_null(
321	xfs_dquot_t *dq)
322	{
323	/*
324	* Called from XFS, where we always check first for a NULL dquot.
325	*/
326	if (!dq)
327	return;
328	xfs_qm_dqrele(dq);
329	}
330
331
ba0f32d4	332	STATIC struct xfs_qmops xfs_qmcore_xfs = {
1da177e4 LT	333	.xfs_qminit = xfs_qm_newmount,
	334	.xfs_qmdone = xfs_qm_unmount_quotadestroy,
	335	.xfs_qmmount = xfs_qm_endmount,
	336	.xfs_qmunmount = xfs_qm_unmount_quotas,
	337	.xfs_dqrele = xfs_qm_dqrele_null,
	338	.xfs_dqattach = xfs_qm_dqattach,
	339	.xfs_dqdetach = xfs_qm_dqdetach,
	340	.xfs_dqpurgeall = xfs_qm_dqpurge_all,
	341	.xfs_dqvopalloc = xfs_qm_vop_dqalloc,
	342	.xfs_dqvopcreate = xfs_qm_vop_dqattach_and_dqmod_newinode,
	343	.xfs_dqvoprename = xfs_qm_vop_rename_dqattach,
	344	.xfs_dqvopchown = xfs_qm_vop_chown,
	345	.xfs_dqvopchownresv = xfs_qm_vop_chown_reserve,
	346	.xfs_dqtrxops = &xfs_trans_dquot_ops,
	347	};
	348
	349	struct bhv_vfsops xfs_qmops = { {
	350	BHV_IDENTITY_INIT(VFS_BHV_QM, VFS_POSITION_QM),
	351	.vfs_parseargs = xfs_qm_parseargs,
	352	.vfs_showargs = xfs_qm_showargs,
	353	.vfs_mount = xfs_qm_mount,
	354	.vfs_sync = xfs_qm_syncall,
	355	.vfs_quotactl = xfs_qm_quotactl, },
	356	};
	357
	358
	359	void __init
	360	xfs_qm_init(void)
	361	{
	362	static char message[] __initdata =
	363	KERN_INFO "SGI XFS Quota Management subsystem\n";
	364
	365	printk(message);
794ee1ba	366	mutex_init(&xfs_Gqm_lock);
1da177e4 LT	367	vfs_bhv_set_custom(&xfs_qmops, &xfs_qmcore_xfs);
	368	xfs_qm_init_procfs();
	369	}
	370
	371	void __exit
	372	xfs_qm_exit(void)
	373	{
	374	vfs_bhv_clr_custom(&xfs_qmops);
	375	xfs_qm_cleanup_procfs();
	376	if (qm_dqzone)
	377	kmem_cache_destroy(qm_dqzone);
	378	if (qm_dqtrxzone)
	379	kmem_cache_destroy(qm_dqtrxzone);
	380	}