1/*
2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef __QUOTA_DOT_H__
11#define __QUOTA_DOT_H__
12
13#include <linux/list_lru.h>
14
15struct gfs2_inode;
16struct gfs2_sbd;
17
18#define NO_UID_QUOTA_CHANGE INVALID_UID
19#define NO_GID_QUOTA_CHANGE INVALID_GID
20
21extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
22extern void gfs2_quota_unhold(struct gfs2_inode *ip);
23
24extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
25extern void gfs2_quota_unlock(struct gfs2_inode *ip);
26
27extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
28			    struct gfs2_alloc_parms *ap);
29extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
30			      kuid_t uid, kgid_t gid);
31
32extern int gfs2_quota_sync(struct super_block *sb, int type);
33extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
34
35extern int gfs2_quota_init(struct gfs2_sbd *sdp);
36extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
37extern int gfs2_quotad(void *data);
38
39extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
40
41static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
42					struct gfs2_alloc_parms *ap)
43{
44	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
45	int ret;
46	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
47		return 0;
48	ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
49	if (ret)
50		return ret;
51	if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
52		return 0;
53	ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
54	if (ret)
55		gfs2_quota_unlock(ip);
56	return ret;
57}
58
59extern const struct quotactl_ops gfs2_quotactl_ops;
60extern struct shrinker gfs2_qd_shrinker;
61extern struct list_lru gfs2_qd_lru;
62extern void __init gfs2_quota_hash_init(void);
63
64#endif /* __QUOTA_DOT_H__ */
65