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_qa_alloc(struct gfs2_inode *ip);
22 extern void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount);
23 extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
24 extern void gfs2_quota_unhold(struct gfs2_inode *ip);
25
26 extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
27 extern void gfs2_quota_unlock(struct gfs2_inode *ip);
28
29 extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
30 struct gfs2_alloc_parms *ap);
31 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
32 kuid_t uid, kgid_t gid);
33
34 extern int gfs2_quota_sync(struct super_block *sb, int type);
35 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
36
37 extern int gfs2_quota_init(struct gfs2_sbd *sdp);
38 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
39 extern int gfs2_quotad(void *data);
40
41 extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
42
gfs2_quota_lock_check(struct gfs2_inode * ip,struct gfs2_alloc_parms * ap)43 static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
44 struct gfs2_alloc_parms *ap)
45 {
46 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
47 int ret;
48
49 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
50 if (capable(CAP_SYS_RESOURCE) ||
51 sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
52 return 0;
53 ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
54 if (ret)
55 return ret;
56 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
57 return 0;
58 ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
59 if (ret)
60 gfs2_quota_unlock(ip);
61 return ret;
62 }
63
64 extern const struct quotactl_ops gfs2_quotactl_ops;
65 extern struct shrinker gfs2_qd_shrinker;
66 extern struct list_lru gfs2_qd_lru;
67 extern void __init gfs2_quota_hash_init(void);
68
69 #endif /* __QUOTA_DOT_H__ */
70