#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/poll.h>
+#include <linux/ns_common.h>
+#include <linux/fs_pin.h>
struct mnt_namespace {
atomic_t count;
- unsigned int proc_inum;
+ struct ns_common ns;
struct mount * root;
struct list_head list;
struct user_namespace *user_ns;
u64 seq; /* Sequence number to prevent loops */
wait_queue_head_t poll;
- int event;
+ u64 event;
};
struct mnt_pcp {
};
struct mountpoint {
- struct list_head m_hash;
+ struct hlist_node m_hash;
struct dentry *m_dentry;
+ struct hlist_head m_list;
int m_count;
};
struct mount {
- struct list_head mnt_hash;
+ struct hlist_node mnt_hash;
struct mount *mnt_parent;
struct dentry *mnt_mountpoint;
struct vfsmount mnt;
+ union {
+ struct rcu_head mnt_rcu;
+ struct llist_node mnt_llist;
+ };
#ifdef CONFIG_SMP
struct mnt_pcp __percpu *mnt_pcp;
#else
struct mount *mnt_master; /* slave is on master->mnt_slave_list */
struct mnt_namespace *mnt_ns; /* containing namespace */
struct mountpoint *mnt_mp; /* where is it mounted */
+ struct hlist_node mnt_mp_list; /* list mounts with the same mountpoint */
#ifdef CONFIG_FSNOTIFY
struct hlist_head mnt_fsnotify_marks;
__u32 mnt_fsnotify_mask;
int mnt_id; /* mount identifier */
int mnt_group_id; /* peer group identifier */
int mnt_expiry_mark; /* true if marked for expiry */
- int mnt_pinned;
- int mnt_ghosts;
+ struct hlist_head mnt_pins;
+ struct fs_pin mnt_umount;
+ struct dentry *mnt_ex_mountpoint;
};
#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
static inline int is_mounted(struct vfsmount *mnt)
{
/* neither detached nor internal? */
- return !IS_ERR_OR_NULL(real_mount(mnt));
+ return !IS_ERR_OR_NULL(real_mount(mnt)->mnt_ns);
}
-extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
+extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *);
+extern struct mount *__lookup_mnt_last(struct vfsmount *, struct dentry *);
+
+extern int __legitimize_mnt(struct vfsmount *, unsigned);
+extern bool legitimize_mnt(struct vfsmount *, unsigned);
+
+extern void __detach_mounts(struct dentry *dentry);
+
+static inline void detach_mounts(struct dentry *dentry)
+{
+ if (!d_mountpoint(dentry))
+ return;
+ __detach_mounts(dentry);
+}
static inline void get_mnt_ns(struct mnt_namespace *ns)
{
atomic_inc(&ns->count);
}
+extern seqlock_t mount_lock;
+
+static inline void lock_mount_hash(void)
+{
+ write_seqlock(&mount_lock);
+}
+
+static inline void unlock_mount_hash(void)
+{
+ write_sequnlock(&mount_lock);
+}
+
struct proc_mounts {
- struct seq_file m;
struct mnt_namespace *ns;
struct path root;
int (*show)(struct seq_file *, struct vfsmount *);
+ void *cached_mount;
+ u64 cached_event;
+ loff_t cached_index;
};
-#define proc_mounts(p) (container_of((p), struct proc_mounts, m))
-
extern const struct seq_operations mounts_op;
+
+extern bool __is_local_mountpoint(struct dentry *dentry);
+static inline bool is_local_mountpoint(struct dentry *dentry)
+{
+ if (!d_mountpoint(dentry))
+ return false;
+
+ return __is_local_mountpoint(dentry);
+}