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
  13#include <linux/list_lru.h>
  14
  15struct gfs2_inode;
  16struct gfs2_sbd;
  17
  18#define NO_UID_QUOTA_CHANGE INVALID_UID
  19#define NO_GID_QUOTA_CHANGE INVALID_GID
  20
  21extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  22extern void gfs2_quota_unhold(struct gfs2_inode *ip);
  23
  24extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  25extern void gfs2_quota_unlock(struct gfs2_inode *ip);
  26
  27extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  28extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
  29                              kuid_t uid, kgid_t gid);
  30
  31extern int gfs2_quota_sync(struct super_block *sb, int type);
  32extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
  33
  34extern int gfs2_quota_init(struct gfs2_sbd *sdp);
  35extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
  36extern int gfs2_quotad(void *data);
  37
  38extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
  39
  40static 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
  57extern const struct quotactl_ops gfs2_quotactl_ops;
  58extern struct shrinker gfs2_qd_shrinker;
  59extern struct list_lru gfs2_qd_lru;
  60extern void __init gfs2_quota_hash_init(void);
  61
  62#endif /* __QUOTA_DOT_H__ */
  63