LXR linux/fs/gfs2/quota.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5 */
   6
   7#ifndef __QUOTA_DOT_H__
   8#define __QUOTA_DOT_H__
   9
  10#include <linux/list_lru.h>
  11
  12struct gfs2_inode;
  13struct gfs2_sbd;
  14
  15#define NO_UID_QUOTA_CHANGE INVALID_UID
  16#define NO_GID_QUOTA_CHANGE INVALID_GID
  17
  18extern int gfs2_qa_alloc(struct gfs2_inode *ip);
  19extern void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount);
  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,
  27                            struct gfs2_alloc_parms *ap);
  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                                        struct gfs2_alloc_parms *ap)
  42{
  43        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  44        int ret;
  45
  46        ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
  47        if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
  48                return 0;
  49        ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
  50        if (ret)
  51                return ret;
  52        if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
  53                return 0;
  54        ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
  55        if (ret)
  56                gfs2_quota_unlock(ip);
  57        return ret;
  58}
  59
  60extern const struct quotactl_ops gfs2_quotactl_ops;
  61extern struct shrinker gfs2_qd_shrinker;
  62extern struct list_lru gfs2_qd_lru;
  63extern void __init gfs2_quota_hash_init(void);
  64
  65#endif /* __QUOTA_DOT_H__ */
  66