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
15 struct gfs2_inode;
16 struct gfs2_sbd;
17
18 #define NO_UID_QUOTA_CHANGE INVALID_UID
19 #define NO_GID_QUOTA_CHANGE INVALID_GID
20
21 extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
22 extern void gfs2_quota_unhold(struct gfs2_inode *ip);
23
24 extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
25 extern void gfs2_quota_unlock(struct gfs2_inode *ip);
26
27 extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
28 struct gfs2_alloc_parms *ap);
29 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
30 kuid_t uid, kgid_t gid);
31
32 extern int gfs2_quota_sync(struct super_block *sb, int type);
33 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
34
35 extern int gfs2_quota_init(struct gfs2_sbd *sdp);
36 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
37 extern int gfs2_quotad(void *data);
38
39 extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
40
gfs2_quota_lock_check(struct gfs2_inode * ip,struct gfs2_alloc_parms * ap)41 static 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
47 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
48 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
49 return 0;
50 ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
51 if (ret)
52 return ret;
53 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
54 return 0;
55 ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
56 if (ret)
57 gfs2_quota_unlock(ip);
58 return ret;
59 }
60
61 extern const struct quotactl_ops gfs2_quotactl_ops;
62 extern struct shrinker gfs2_qd_shrinker;
63 extern struct list_lru gfs2_qd_lru;
64 extern void __init gfs2_quota_hash_init(void);
65
66 #endif /* __QUOTA_DOT_H__ */
67