linux/fs/gfs2/quota.h
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   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
  13struct gfs2_inode;
  14struct gfs2_sbd;
  15struct shrink_control;
  16
  17#define NO_QUOTA_CHANGE ((u32)-1)
  18
  19extern int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid);
  20extern void gfs2_quota_unhold(struct gfs2_inode *ip);
  21
  22extern int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid);
  23extern void gfs2_quota_unlock(struct gfs2_inode *ip);
  24
  25extern int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid);
  26extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
  27                              u32 uid, u32 gid);
  28
  29extern int gfs2_quota_sync(struct super_block *sb, int type);
  30extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id);
  31
  32extern int gfs2_quota_init(struct gfs2_sbd *sdp);
  33extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
  34extern int gfs2_quotad(void *data);
  35
  36extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
  37
  38static 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
  55extern int gfs2_shrink_qd_memory(struct shrinker *shrink,
  56                                 struct shrink_control *sc);
  57extern const struct quotactl_ops gfs2_quotactl_ops;
  58
  59#endif /* __QUOTA_DOT_H__ */
  60
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