fs/gfs2/quota.h

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