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.mnt_flags & MNT_SHARED) 14 #define IS_MNT_SLAVE(m) ((m)->mnt_master) 15 #define IS_MNT_NEW(m) (!(m)->mnt_ns || is_anon_ns((m)->mnt_ns)) 16 #define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED) 17 #define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE) 18 #define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED) 19 #define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED) 20 #define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_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_SHARED_TO_SLAVE 0x20 29 #define CL_COPY_MNT_NS_FILE 0x40 30 31 #define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE) 32 set_mnt_shared(struct mount * mnt)33 static inline void set_mnt_shared(struct mount *mnt) 34 { 35 mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK; 36 mnt->mnt.mnt_flags |= MNT_SHARED; 37 } 38 39 void change_mnt_propagation(struct mount *, int); 40 int propagate_mnt(struct mount *, struct mountpoint *, struct mount *, 41 struct hlist_head *); 42 int propagate_umount(struct list_head *); 43 int propagate_mount_busy(struct mount *, int); 44 void propagate_mount_unlock(struct mount *); 45 void mnt_release_group_id(struct mount *); 46 int get_dominating_id(struct mount *mnt, const struct path *root); 47 int mnt_get_count(struct mount *mnt); 48 void mnt_set_mountpoint(struct mount *, struct mountpoint *, 49 struct mount *); 50 void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp, 51 struct mount *mnt); 52 struct mount *copy_tree(struct mount *, struct dentry *, int); 53 bool is_path_reachable(struct mount *, struct dentry *, 54 const struct path *root); 55 int count_mounts(struct mnt_namespace *ns, struct mount *mnt); 56 bool propagation_would_overmount(const struct mount *from, 57 const struct mount *to, 58 const struct mountpoint *mp); 59 #endif /* _LINUX_PNODE_H */ 60