1 #include <linux/mount.h>
2 #include <linux/seq_file.h>
3 #include <linux/poll.h>
9 struct user_namespace *user_ns;
10 u64 seq; /* Sequence number to prevent loops */
11 wait_queue_head_t poll;
21 struct list_head mnt_hash;
22 struct mount *mnt_parent;
23 struct dentry *mnt_mountpoint;
26 struct mnt_pcp __percpu *mnt_pcp;
31 struct list_head mnt_mounts; /* list of children, anchored here */
32 struct list_head mnt_child; /* and going through their mnt_child */
33 struct list_head mnt_instance; /* mount instance on sb->s_mounts */
34 const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
35 struct list_head mnt_list;
36 struct list_head mnt_expire; /* link in fs-specific expiry list */
37 struct list_head mnt_share; /* circular list of shared mounts */
38 struct list_head mnt_slave_list;/* list of slave mounts */
39 struct list_head mnt_slave; /* slave list entry */
40 struct mount *mnt_master; /* slave is on master->mnt_slave_list */
41 struct mnt_namespace *mnt_ns; /* containing namespace */
42 #ifdef CONFIG_FSNOTIFY
43 struct hlist_head mnt_fsnotify_marks;
44 __u32 mnt_fsnotify_mask;
46 int mnt_id; /* mount identifier */
47 int mnt_group_id; /* peer group identifier */
48 int mnt_expiry_mark; /* true if marked for expiry */
53 #define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
55 static inline struct mount *real_mount(struct vfsmount *mnt)
57 return container_of(mnt, struct mount, mnt);
60 static inline int mnt_has_parent(struct mount *mnt)
62 return mnt != mnt->mnt_parent;
65 static inline int is_mounted(struct vfsmount *mnt)
67 /* neither detached nor internal? */
68 return !IS_ERR_OR_NULL(real_mount(mnt));
71 extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
73 static inline void get_mnt_ns(struct mnt_namespace *ns)
75 atomic_inc(&ns->count);
80 struct mnt_namespace *ns;
82 int (*show)(struct seq_file *, struct vfsmount *);
85 #define proc_mounts(p) (container_of((p), struct proc_mounts, m))
87 extern const struct seq_operations mounts_op;