[linux-2.6-block.git] / fs / gfs2 / quota.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 */

#ifndef __QUOTA_DOT_H__
#define __QUOTA_DOT_H__

#include <linux/list_lru.h>

struct gfs2_inode;
struct gfs2_sbd;

#define NO_UID_QUOTA_CHANGE INVALID_UID
#define NO_GID_QUOTA_CHANGE INVALID_GID

extern int gfs2_qa_alloc(struct gfs2_inode *ip);
extern void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount);
extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
extern void gfs2_quota_unhold(struct gfs2_inode *ip);

extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
extern void gfs2_quota_unlock(struct gfs2_inode *ip);

extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
			    struct gfs2_alloc_parms *ap);
extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
			      kuid_t uid, kgid_t gid);

extern int gfs2_quota_sync(struct super_block *sb, int type);
extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);

extern int gfs2_quota_init(struct gfs2_sbd *sdp);
extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
extern int gfs2_quotad(void *data);

extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);

static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
					struct gfs2_alloc_parms *ap)
{
	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	int ret;

	ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
		return 0;
	ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
	if (ret)
		return ret;
	if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
		return 0;
	ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
	if (ret)
		gfs2_quota_unlock(ip);
	return ret;
}

extern const struct quotactl_ops gfs2_quotactl_ops;
extern struct shrinker gfs2_qd_shrinker;
extern struct list_lru gfs2_qd_lru;
extern void __init gfs2_quota_hash_init(void);

#endif /* __QUOTA_DOT_H__ */
Commit	Line	Data
7336d0e6	1	/* SPDX-License-Identifier: GPL-2.0-only */
b3b94faa DT	2	/*
b3b94faa DT	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	5	*/
	6
	7	#ifndef __QUOTA_DOT_H__
	8	#define __QUOTA_DOT_H__
	9
2147dbfd SW	10	#include <linux/list_lru.h>
2147dbfd SW	11
f2f7ba52 SW	12	struct gfs2_inode;
	13	struct gfs2_sbd;
	14
f4108a60 EB	15	#define NO_UID_QUOTA_CHANGE INVALID_UID
f4108a60 EB	16	#define NO_GID_QUOTA_CHANGE INVALID_GID
b3b94faa	17
b54e9a0b	18	extern int gfs2_qa_alloc(struct gfs2_inode *ip);
a097dc7e	19	extern void gfs2_qa_delete(struct gfs2_inode ip, atomic_t wcount);
7c06b5d6	20	extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
9ac1b4d9	21	extern void gfs2_quota_unhold(struct gfs2_inode *ip);
b3b94faa	22
7c06b5d6	23	extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
9ac1b4d9	24	extern void gfs2_quota_unlock(struct gfs2_inode *ip);
b3b94faa	25
b8fbf471 AD	26	extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
b8fbf471 AD	27	struct gfs2_alloc_parms *ap);
9ac1b4d9	28	extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
7c06b5d6	29	kuid_t uid, kgid_t gid);
b3b94faa	30
ceed1723	31	extern int gfs2_quota_sync(struct super_block *sb, int type);
ed87dabc	32	extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
b3b94faa	33
9ac1b4d9 SW	34	extern int gfs2_quota_init(struct gfs2_sbd *sdp);
	35	extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
	36	extern int gfs2_quotad(void *data);
b3b94faa	37
3d3c10f2 BM	38	extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
3d3c10f2 BM	39
b8fbf471 AD	40	static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
b8fbf471 AD	41	struct gfs2_alloc_parms *ap)
d82661d9 SW	42	{
	43	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	44	int ret;
174d1232 AG	45
174d1232 AG	46	ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
d82661d9 SW	47	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
d82661d9 SW	48	return 0;
f4108a60	49	ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
d82661d9 SW	50	if (ret)
	51	return ret;
	52	if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
	53	return 0;
b8fbf471	54	ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
d82661d9 SW	55	if (ret)
	56	gfs2_quota_unlock(ip);
	57	return ret;
	58	}
	59
cc632e7f	60	extern const struct quotactl_ops gfs2_quotactl_ops;
2147dbfd SW	61	extern struct shrinker gfs2_qd_shrinker;
2147dbfd SW	62	extern struct list_lru gfs2_qd_lru;
c754fbbb	63	extern void __init gfs2_quota_hash_init(void);
0a7ab79c	64
b3b94faa	65	#endif /* __QUOTA_DOT_H__ */