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 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change, 29 kuid_t uid, kgid_t gid); 30 31 extern int gfs2_quota_sync(struct super_block *sb, int type); 32 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid); 33 34 extern int gfs2_quota_init(struct gfs2_sbd *sdp); 35 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp); 36 extern int gfs2_quotad(void *data); 37 38 extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp); 39 40 static inline int gfs2_quota_lock_check(struct gfs2_inode *ip) 41 { 42 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 43 int ret; 44 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) 45 return 0; 46 ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); 47 if (ret) 48 return ret; 49 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) 50 return 0; 51 ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid); 52 if (ret) 53 gfs2_quota_unlock(ip); 54 return ret; 55 } 56 57 extern const struct quotactl_ops gfs2_quotactl_ops; 58 extern struct shrinker gfs2_qd_shrinker; 59 extern struct list_lru gfs2_qd_lru; 60 61 #endif /* __QUOTA_DOT_H__ */ 62