original development tree for Linux kernel GTP module; now long in mainline.
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#include <linux/mount.h>
struct mnt_pcp {
int mnt_count;
int mnt_writers;
struct mount {
struct list_head mnt_hash;
struct mount *mnt_parent;
struct dentry *mnt_mountpoint;
struct vfsmount mnt;
struct mnt_pcp __percpu *mnt_pcp;
atomic_t mnt_longterm; /* how many of the refs are longterm */
int mnt_count;
int mnt_writers;
struct list_head mnt_mounts; /* list of children, anchored here */
struct list_head mnt_child; /* and going through their mnt_child */
/* yet to be moved - up to mnt_list */
struct list_head mnt_expire; /* link in fs-specific expiry list */
struct list_head mnt_share; /* circular list of shared mounts */
struct list_head mnt_slave_list;/* list of slave mounts */
struct list_head mnt_slave; /* slave list entry */
struct mount *mnt_master; /* slave is on master->mnt_slave_list */
struct mnt_namespace *mnt_ns; /* containing namespace */
int mnt_id; /* mount identifier */
int mnt_group_id; /* peer group identifier */
static inline struct mount *real_mount(struct vfsmount *mnt)
return container_of(mnt, struct mount, mnt);
static inline int mnt_has_parent(struct mount *mnt)
return mnt != mnt->mnt_parent;
extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);