quota.h 2.0 KB

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  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. #ifndef __QUOTA_DOT_H__
  7. #define __QUOTA_DOT_H__
  8. #include <linux/list_lru.h>
  9. struct gfs2_inode;
  10. struct gfs2_sbd;
  11. #define NO_UID_QUOTA_CHANGE INVALID_UID
  12. #define NO_GID_QUOTA_CHANGE INVALID_GID
  13. extern int gfs2_qa_get(struct gfs2_inode *ip);
  14. extern void gfs2_qa_put(struct gfs2_inode *ip);
  15. extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  16. extern void gfs2_quota_unhold(struct gfs2_inode *ip);
  17. extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
  18. extern void gfs2_quota_unlock(struct gfs2_inode *ip);
  19. extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
  20. struct gfs2_alloc_parms *ap);
  21. extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
  22. kuid_t uid, kgid_t gid);
  23. extern int gfs2_quota_sync(struct super_block *sb, int type);
  24. extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
  25. extern int gfs2_quota_init(struct gfs2_sbd *sdp);
  26. extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
  27. extern int gfs2_quotad(void *data);
  28. extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
  29. static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
  30. struct gfs2_alloc_parms *ap)
  31. {
  32. struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  33. int ret;
  34. ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
  35. if (capable(CAP_SYS_RESOURCE) ||
  36. sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
  37. return 0;
  38. ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
  39. if (ret)
  40. return ret;
  41. if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
  42. return 0;
  43. ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
  44. if (ret)
  45. gfs2_quota_unlock(ip);
  46. return ret;
  47. }
  48. extern const struct quotactl_ops gfs2_quotactl_ops;
  49. extern struct shrinker gfs2_qd_shrinker;
  50. extern struct list_lru gfs2_qd_lru;
  51. extern void __init gfs2_quota_hash_init(void);
  52. #endif /* __QUOTA_DOT_H__ */