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 10 #include <linux/list.h> 11 #include "mount.h" 12 13 #define IS_MNT_SHARED(m) ((m)->mnt_t_flags & T_SHARED) 14 #define IS_MNT_SLAVE(m) ((m)->mnt_master) 15 #define IS_MNT_NEW(m) (!(m)->mnt_ns) 16 #define CLEAR_MNT_SHARED(m) ((m)->mnt_t_flags &= ~T_SHARED) 17 #define IS_MNT_UNBINDABLE(m) ((m)->mnt_t_flags & T_UNBINDABLE) 18 #define IS_MNT_MARKED(m) ((m)->mnt_t_flags & T_MARKED) 19 #define SET_MNT_MARK(m) ((m)->mnt_t_flags |= T_MARKED) 20 #define CLEAR_MNT_MARK(m) ((m)->mnt_t_flags &= ~T_MARKED) 21 #define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED) 22 23 #define CL_EXPIRE 0x01 24 #define CL_SLAVE 0x02 25 #define CL_COPY_UNBINDABLE 0x04 26 #define CL_MAKE_SHARED 0x08 27 #define CL_PRIVATE 0x10 28 #define CL_COPY_MNT_NS_FILE 0x40 29 30 /* 31 * EXCL[namespace_sem] 32 */ 33 static inline void set_mnt_shared(struct mount *mnt) 34 { 35 mnt->mnt_t_flags &= ~T_SHARED_MASK; 36 mnt->mnt_t_flags |= T_SHARED; 37 } 38 39 static inline bool peers(const struct mount *m1, const struct mount *m2) 40 { 41 return m1->mnt_group_id == m2->mnt_group_id && m1->mnt_group_id; 42 } 43 44 void change_mnt_propagation(struct mount *, int); 45 void bulk_make_private(struct list_head *); 46 int propagate_mnt(struct mount *, struct mountpoint *, struct mount *, 47 struct hlist_head *); 48 void propagate_umount(struct list_head *); 49 int propagate_mount_busy(struct mount *, int); 50 void propagate_mount_unlock(struct mount *); 51 void mnt_release_group_id(struct mount *); 52 int get_dominating_id(struct mount *mnt, const struct path *root); 53 int mnt_get_count(struct mount *mnt); 54 void mnt_set_mountpoint(struct mount *, struct mountpoint *, 55 struct mount *); 56 void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp, 57 struct mount *mnt); 58 struct mount *copy_tree(struct mount *, struct dentry *, int); 59 bool is_path_reachable(struct mount *, struct dentry *, 60 const struct path *root); 61 int count_mounts(struct mnt_namespace *ns, struct mount *mnt); 62 bool propagation_would_overmount(const struct mount *from, 63 const struct mount *to, 64 const struct mountpoint *mp); 65 #endif /* _LINUX_PNODE_H */ 66