xref: /openbmc/linux/fs/gfs2/quota.h (revision 4800cd83)
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 struct gfs2_inode;
14 struct gfs2_sbd;
15 
16 #define NO_QUOTA_CHANGE ((u32)-1)
17 
18 extern int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid);
19 extern void gfs2_quota_unhold(struct gfs2_inode *ip);
20 
21 extern int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid);
22 extern void gfs2_quota_unlock(struct gfs2_inode *ip);
23 
24 extern int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid);
25 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
26 			      u32 uid, u32 gid);
27 
28 extern int gfs2_quota_sync(struct super_block *sb, int type, int wait);
29 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id);
30 
31 extern int gfs2_quota_init(struct gfs2_sbd *sdp);
32 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
33 extern int gfs2_quotad(void *data);
34 
35 extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
36 
37 static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
38 {
39 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
40 	int ret;
41 	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
42 		return 0;
43 	ret = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
44 	if (ret)
45 		return ret;
46 	if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
47 		return 0;
48 	ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
49 	if (ret)
50 		gfs2_quota_unlock(ip);
51 	return ret;
52 }
53 
54 extern int gfs2_shrink_qd_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask);
55 extern const struct quotactl_ops gfs2_quotactl_ops;
56 
57 #endif /* __QUOTA_DOT_H__ */
58