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         /* 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 */
  27         struct mount *mnt_master;       /* slave is on master->mnt_slave_list */
  28         struct mnt_namespace *mnt_ns;   /* containing namespace */
  29 };
  30
  31 static inline struct mount *real_mount(struct vfsmount *mnt)
  32 {
  33         return container_of(mnt, struct mount, mnt);
  34 }
  35
  36 static inline int mnt_has_parent(struct mount *mnt)
  37 {
  38         return mnt != mnt->mnt_parent;
  39 }
  40
  41 extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);