1 /* 2 * linux/fs/pnode.h 3 * 4 * (C) Copyright IBM Corporation 2005. 5 * Released under GPL v2. 6 * 7 */ 8 #ifndef _LINUX_PNODE_H 9 #define _LINUX_PNODE_H 10 11 #include <linux/list.h> 12 #include "mount.h" 13 14 #define IS_MNT_SHARED(m) ((m)->mnt.mnt_flags & MNT_SHARED) 15 #define IS_MNT_SLAVE(m) ((m)->mnt_master) 16 #define IS_MNT_NEW(m) (!(m)->mnt_ns) 17 #define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED) 18 #define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE) 19 #define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED) 20 #define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED) 21 #define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_MARKED) 22 #define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED) 23 #define IS_MNT_LOCKED_AND_LAZY(m) \ 24 (((m)->mnt.mnt_flags & (MNT_LOCKED|MNT_SYNC_UMOUNT)) == MNT_LOCKED) 25 26 #define CL_EXPIRE 0x01 27 #define CL_SLAVE 0x02 28 #define CL_COPY_UNBINDABLE 0x04 29 #define CL_MAKE_SHARED 0x08 30 #define CL_PRIVATE 0x10 31 #define CL_SHARED_TO_SLAVE 0x20 32 #define CL_UNPRIVILEGED 0x40 33 #define CL_COPY_MNT_NS_FILE 0x80 34 35 #define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE) 36 37 static inline void set_mnt_shared(struct mount *mnt) 38 { 39 mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK; 40 mnt->mnt.mnt_flags |= MNT_SHARED; 41 } 42 43 void change_mnt_propagation(struct mount *, int); 44 int propagate_mnt(struct mount *, struct mountpoint *, struct mount *, 45 struct hlist_head *); 46 int propagate_umount(struct list_head *); 47 int propagate_mount_busy(struct mount *, int); 48 void propagate_mount_unlock(struct mount *); 49 void mnt_release_group_id(struct mount *); 50 int get_dominating_id(struct mount *mnt, const struct path *root); 51 unsigned int mnt_get_count(struct mount *mnt); 52 void mnt_set_mountpoint(struct mount *, struct mountpoint *, 53 struct mount *); 54 struct mount *copy_tree(struct mount *, struct dentry *, int); 55 bool is_path_reachable(struct mount *, struct dentry *, 56 const struct path *root); 57 #endif /* _LINUX_PNODE_H */ 58