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Al Virob2dba1a2011-11-23 19:26:23 -05001#include <linux/mount.h>
2
Al Viro68e8a9f2011-11-24 22:53:09 -05003struct mnt_pcp {
4 int mnt_count;
5 int mnt_writers;
6};
7
Al Viro7d6fec42011-11-23 12:14:10 -05008struct mount {
Al Viro1b8e5562011-11-24 21:01:32 -05009 struct list_head mnt_hash;
Al Viro0714a532011-11-24 22:19:58 -050010 struct mount *mnt_parent;
Al Viroa73324d2011-11-24 22:25:07 -050011 struct dentry *mnt_mountpoint;
Al Viro7d6fec42011-11-23 12:14:10 -050012 struct vfsmount mnt;
Al Viro68e8a9f2011-11-24 22:53:09 -050013#ifdef CONFIG_SMP
14 struct mnt_pcp __percpu *mnt_pcp;
15 atomic_t mnt_longterm; /* how many of the refs are longterm */
16#else
17 int mnt_count;
18 int mnt_writers;
19#endif
Al Viro6b41d532011-11-24 23:24:33 -050020 struct list_head mnt_mounts; /* list of children, anchored here */
21 struct list_head mnt_child; /* and going through their mnt_child */
Al Viro6776db3d2011-11-25 00:22:05 -050022 /* yet to be moved - up to mnt_list */
23 struct list_head mnt_expire; /* link in fs-specific expiry list */
24 struct list_head mnt_share; /* circular list of shared mounts */
25 struct list_head mnt_slave_list;/* list of slave mounts */
26 struct list_head mnt_slave; /* slave list entry */
Al Viro32301922011-11-25 00:10:28 -050027 struct mount *mnt_master; /* slave is on master->mnt_slave_list */
Al Viro143c8c92011-11-25 00:46:35 -050028 struct mnt_namespace *mnt_ns; /* containing namespace */
Al Viro7d6fec42011-11-23 12:14:10 -050029};
30
31static inline struct mount *real_mount(struct vfsmount *mnt)
32{
33 return container_of(mnt, struct mount, mnt);
34}
35
Al Viro676da582011-11-24 21:47:05 -050036static inline int mnt_has_parent(struct mount *mnt)
Al Virob2dba1a2011-11-23 19:26:23 -050037{
Al Viro0714a532011-11-24 22:19:58 -050038 return mnt != mnt->mnt_parent;
Al Virob2dba1a2011-11-23 19:26:23 -050039}
Al Viroc7105362011-11-24 18:22:03 -050040
41extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);