LXR linux/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
  13struct gfs2_inode;
  14struct gfs2_sbd;
  15struct shrink_control;
  16
  17#define NO_UID_QUOTA_CHANGE INVALID_UID
  18#define NO_GID_QUOTA_CHANGE INVALID_GID
  19
  20extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  21extern void gfs2_quota_unhold(struct gfs2_inode *ip);
  22
  23extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  24extern void gfs2_quota_unlock(struct gfs2_inode *ip);
  25
  26extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  27extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
  28                              kuid_t uid, kgid_t gid);
  29
  30extern int gfs2_quota_sync(struct super_block *sb, int type);
  31extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
  32
  33extern int gfs2_quota_init(struct gfs2_sbd *sdp);
  34extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
  35extern int gfs2_quotad(void *data);
  36
  37extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
  38
  39static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
  40{
  41        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  42        int ret;
  43        if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
  44                return 0;
  45        ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
  46        if (ret)
  47                return ret;
  48        if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
  49                return 0;
  50        ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
  51        if (ret)
  52                gfs2_quota_unlock(ip);
  53        return ret;
  54}
  55
  56extern int gfs2_shrink_qd_memory(struct shrinker *shrink,
  57                                 struct shrink_control *sc);
  58extern const struct quotactl_ops gfs2_quotactl_ops;
  59
  60#endif /* __QUOTA_DOT_H__ */
  61