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 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 (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) 51 return 0; 52 ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); 53 if (ret) 54 return ret; 55 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) 56 return 0; 57 ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap); 58 if (ret) 59 gfs2_quota_unlock(ip); 60 return ret; 61 } 62 63 extern const struct quotactl_ops gfs2_quotactl_ops; 64 extern struct shrinker gfs2_qd_shrinker; 65 extern struct list_lru gfs2_qd_lru; 66 extern void __init gfs2_quota_hash_init(void); 67 68 #endif /* __QUOTA_DOT_H__ */ 69