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
  12 struct gfs2_inode;
  13 struct gfs2_sbd;
  14
  15 #define NO_UID_QUOTA_CHANGE INVALID_UID
  16 #define NO_GID_QUOTA_CHANGE INVALID_GID
  17
  18 extern int gfs2_qa_get(struct gfs2_inode *ip);
  19 extern void gfs2_qa_put(struct gfs2_inode *ip);
  20 extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  21 extern void gfs2_quota_unhold(struct gfs2_inode *ip);
  22
  23 extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  24 extern void gfs2_quota_unlock(struct gfs2_inode *ip);
  25
  26 extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
  27                             struct gfs2_alloc_parms *ap);
  28 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
  29                               kuid_t uid, kgid_t gid);
  30
  31 extern int gfs2_quota_sync(struct super_block *sb, int type);
  32 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
  33
  34 extern int gfs2_quota_init(struct gfs2_sbd *sdp);
  35 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
  36 extern int gfs2_quotad(void *data);
  37
  38 extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
  39
  40 static 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 (capable(CAP_SYS_RESOURCE) ||
  48             sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
  49                 return 0;
  50         ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
  51         if (ret)
  52                 return ret;
  53         if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
  54                 return 0;
  55         ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
  56         if (ret)
  57                 gfs2_quota_unlock(ip);
  58         return ret;
  59 }
  60
  61 extern const struct quotactl_ops gfs2_quotactl_ops;
  62 extern struct shrinker gfs2_qd_shrinker;
  63 extern struct list_lru gfs2_qd_lru;
  64 extern void __init gfs2_quota_hash_init(void);
  65
  66 #endif /* __QUOTA_DOT_H__ */