fs/mount.h

   1 #include <linux/mount.h>
   2
   3 struct mnt_pcp {
   4         int mnt_count;
   5         int mnt_writers;
   6 };
   7
   8 struct mount {
   9         struct list_head mnt_hash;
  10         struct mount *mnt_parent;
  11         struct dentry *mnt_mountpoint;
  12         struct vfsmount mnt;
  13 #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
  20         struct list_head mnt_mounts;    /* list of children, anchored here */
  21         struct list_head mnt_child;     /* and going through their mnt_child */
  22 };
  23
  24 static inline struct mount *real_mount(struct vfsmount *mnt)
  25 {
  26         return container_of(mnt, struct mount, mnt);
  27 }
  28
  29 static inline int mnt_has_parent(struct mount *mnt)
  30 {
  31         return mnt != mnt->mnt_parent;
  32 }
  33
  34 extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);