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| 2 | |
| 3 | * linux/fs/pnode.h
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| 4 | *
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| 5 | * (C) Copyright IBM Corporation 2005.
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| 6 |
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| 7 | #ifndef _LINUX_PNODE_H
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| 8 | #define _LINUX_PNODE_H
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| 9 |
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| 10 | #include <linux/list.h>
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| 11 | #include "mount.h"
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| 12 |
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| 13 | #define IS_MNT_SHARED(m) ((m)->mnt_t_flags & T_SHARED)
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| 14 | #define IS_MNT_SLAVE(m) ((m)->mnt_master)
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| 15 | #define IS_MNT_NEW(m) (!(m)->mnt_ns)
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| 16 | #define CLEAR_MNT_SHARED(m) ((m)->mnt_t_flags &= ~T_SHARED)
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| 17 | #define IS_MNT_UNBINDABLE(m) ((m)->mnt_t_flags & T_UNBINDABLE)
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| 18 | #define IS_MNT_MARKED(m) ((m)->mnt_t_flags & T_MARKED)
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| 19 | #define SET_MNT_MARK(m) ((m)->mnt_t_flags |= T_MARKED)
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| 20 | #define CLEAR_MNT_MARK(m) ((m)->mnt_t_flags &= ~T_MARKED)
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| 21 | #define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED)
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| 22 |
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| 23 | #define CL_EXPIRE 0x01
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| 24 | #define CL_SLAVE 0x02
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| 25 | #define CL_COPY_UNBINDABLE 0x04
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| 26 | #define CL_MAKE_SHARED 0x08
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| 27 | #define CL_PRIVATE 0x10
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| 28 | #define CL_COPY_MNT_NS_FILE 0x40
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| 29 |
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| 30 | |
| 31 | * EXCL[namespace_sem]
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| 32 |
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| 33 | static inline void set_mnt_shared(struct mount *mnt)
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| 34 | {
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| 35 | mnt->mnt_t_flags &= ~T_SHARED_MASK;
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| 36 | mnt->mnt_t_flags |= T_SHARED;
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| 37 | }
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| 38 |
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| 39 | static inline bool peers(const struct mount *m1, const struct mount *m2)
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| 40 | {
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| 41 | return m1->mnt_group_id == m2->mnt_group_id && m1->mnt_group_id;
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| 42 | }
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| 43 |
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| 44 | void change_mnt_propagation(struct mount *, int);
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| 45 | void bulk_make_private(struct list_head *);
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| 46 | int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
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| 47 | struct hlist_head *);
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| 48 | void propagate_umount(struct list_head *);
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| 49 | int propagate_mount_busy(struct mount *, int);
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| 50 | void propagate_mount_unlock(struct mount *);
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| 51 | void mnt_release_group_id(struct mount *);
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| 52 | int get_dominating_id(struct mount *mnt, const struct path *root);
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| 53 | int mnt_get_count(struct mount *mnt);
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| 54 | void mnt_set_mountpoint(struct mount *, struct mountpoint *,
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| 55 | struct mount *);
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| 56 | void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
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| 57 | struct mount *mnt);
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| 58 | struct mount *copy_tree(struct mount *, struct dentry *, int);
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| 59 | bool is_path_reachable(struct mount *, struct dentry *,
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| 60 | const struct path *root);
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| 61 | int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
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| 62 | bool propagation_would_overmount(const struct mount *from,
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| 63 | const struct mount *to,
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| 64 | const struct mountpoint *mp);
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| 65 | #endif
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