1#include <linux/mount.h>
 2#include <linux/seq_file.h>
 3#include <linux/poll.h>
 4
 5struct mnt_namespace {
 6	atomic_t		count;
 7	struct mount *	root;
 8	struct list_head	list;
 9	wait_queue_head_t poll;
10	int event;
11};
12
13struct mnt_pcp {
14	int mnt_count;
15	int mnt_writers;
16};
17
18struct mount {
19	struct list_head mnt_hash;
20	struct mount *mnt_parent;
21	struct dentry *mnt_mountpoint;
22	struct vfsmount mnt;
23#ifdef CONFIG_SMP
24	struct mnt_pcp __percpu *mnt_pcp;
25	atomic_t mnt_longterm;		/* how many of the refs are longterm */
26#else
27	int mnt_count;
28	int mnt_writers;
29#endif
30	struct list_head mnt_mounts;	/* list of children, anchored here */
31	struct list_head mnt_child;	/* and going through their mnt_child */
32	struct list_head mnt_instance;	/* mount instance on sb->s_mounts */
33	const char *mnt_devname;	/* Name of device e.g. /dev/dsk/hda1 */
34	struct list_head mnt_list;
35	struct list_head mnt_expire;	/* link in fs-specific expiry list */
36	struct list_head mnt_share;	/* circular list of shared mounts */
37	struct list_head mnt_slave_list;/* list of slave mounts */
38	struct list_head mnt_slave;	/* slave list entry */
39	struct mount *mnt_master;	/* slave is on master->mnt_slave_list */
40	struct mnt_namespace *mnt_ns;	/* containing namespace */
41#ifdef CONFIG_FSNOTIFY
42	struct hlist_head mnt_fsnotify_marks;
43	__u32 mnt_fsnotify_mask;
44#endif
45	int mnt_id;			/* mount identifier */
46	int mnt_group_id;		/* peer group identifier */
47	int mnt_expiry_mark;		/* true if marked for expiry */
48	int mnt_pinned;
49	int mnt_ghosts;
50};
51
52static inline struct mount *real_mount(struct vfsmount *mnt)
53{
54	return container_of(mnt, struct mount, mnt);
55}
56
57static inline int mnt_has_parent(struct mount *mnt)
58{
59	return mnt != mnt->mnt_parent;
60}
61
62extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
63
64static inline void get_mnt_ns(struct mnt_namespace *ns)
65{
66	atomic_inc(&ns->count);
67}
68
69struct proc_mounts {
70	struct seq_file m; /* must be the first element */
71	struct mnt_namespace *ns;
72	struct path root;
73	int (*show)(struct seq_file *, struct vfsmount *);
74};
75
76extern const struct seq_operations mounts_op;