pnode.h 2.0 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /*
  3. * linux/fs/pnode.h
  4. *
  5. * (C) Copyright IBM Corporation 2005.
  6. */
  7. #ifndef _LINUX_PNODE_H
  8. #define _LINUX_PNODE_H
  9. #include <linux/list.h>
  10. #include "mount.h"
  11. #define IS_MNT_SHARED(m) ((m)->mnt.mnt_flags & MNT_SHARED)
  12. #define IS_MNT_SLAVE(m) ((m)->mnt_master)
  13. #define IS_MNT_NEW(m) (!(m)->mnt_ns || is_anon_ns((m)->mnt_ns))
  14. #define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED)
  15. #define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE)
  16. #define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED)
  17. #define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED)
  18. #define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_MARKED)
  19. #define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED)
  20. #define CL_EXPIRE 0x01
  21. #define CL_SLAVE 0x02
  22. #define CL_COPY_UNBINDABLE 0x04
  23. #define CL_MAKE_SHARED 0x08
  24. #define CL_PRIVATE 0x10
  25. #define CL_SHARED_TO_SLAVE 0x20
  26. #define CL_COPY_MNT_NS_FILE 0x40
  27. #define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE)
  28. static inline void set_mnt_shared(struct mount *mnt)
  29. {
  30. mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK;
  31. mnt->mnt.mnt_flags |= MNT_SHARED;
  32. }
  33. void change_mnt_propagation(struct mount *, int);
  34. int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
  35. struct hlist_head *);
  36. int propagate_umount(struct list_head *);
  37. int propagate_mount_busy(struct mount *, int);
  38. void propagate_mount_unlock(struct mount *);
  39. void mnt_release_group_id(struct mount *);
  40. int get_dominating_id(struct mount *mnt, const struct path *root);
  41. int mnt_get_count(struct mount *mnt);
  42. void mnt_set_mountpoint(struct mount *, struct mountpoint *,
  43. struct mount *);
  44. void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
  45. struct mount *mnt);
  46. struct mount *copy_tree(struct mount *, struct dentry *, int);
  47. bool is_path_reachable(struct mount *, struct dentry *,
  48. const struct path *root);
  49. int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
  50. #endif /* _LINUX_PNODE_H */