1 #include <linux/mount.h> 2 #include <linux/seq_file.h> 3 #include <linux/poll.h> 4 5 struct mnt_namespace { 6 atomic_t count; 7 struct mount * root; 8 struct list_head list; 9 wait_queue_head_t poll; 10 int event; 11 }; 12 13 struct mnt_pcp { 14 int mnt_count; 15 int mnt_writers; 16 }; 17 18 struct mount { 19 struct list_head mnt_hash; 20 struct mount *mnt_parent; 21 struct dentry *mnt_mountpoint; 22 struct vfsmount mnt; 23 #ifdef CONFIG_SMP 24 struct mnt_pcp __percpu *mnt_pcp; 25 atomic_t mnt_longterm; /* how many of the refs are longterm */ 26 #else 27 int mnt_count; 28 int mnt_writers; 29 #endif 30 struct list_head mnt_mounts; /* list of children, anchored here */ 31 struct list_head mnt_child; /* and going through their mnt_child */ 32 struct list_head mnt_instance; /* mount instance on sb->s_mounts */ 33 const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ 34 struct list_head mnt_list; 35 struct list_head mnt_expire; /* link in fs-specific expiry list */ 36 struct list_head mnt_share; /* circular list of shared mounts */ 37 struct list_head mnt_slave_list;/* list of slave mounts */ 38 struct list_head mnt_slave; /* slave list entry */ 39 struct mount *mnt_master; /* slave is on master->mnt_slave_list */ 40 struct mnt_namespace *mnt_ns; /* containing namespace */ 41 #ifdef CONFIG_FSNOTIFY 42 struct hlist_head mnt_fsnotify_marks; 43 __u32 mnt_fsnotify_mask; 44 #endif 45 int mnt_id; /* mount identifier */ 46 int mnt_group_id; /* peer group identifier */ 47 int mnt_expiry_mark; /* true if marked for expiry */ 48 int mnt_pinned; 49 int mnt_ghosts; 50 }; 51 real_mount(struct vfsmount * mnt)52static inline struct mount *real_mount(struct vfsmount *mnt) 53 { 54 return container_of(mnt, struct mount, mnt); 55 } 56 mnt_has_parent(struct mount * mnt)57static inline int mnt_has_parent(struct mount *mnt) 58 { 59 return mnt != mnt->mnt_parent; 60 } 61 62 extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int); 63 get_mnt_ns(struct mnt_namespace * ns)64static inline void get_mnt_ns(struct mnt_namespace *ns) 65 { 66 atomic_inc(&ns->count); 67 } 68 69 struct proc_mounts { 70 struct seq_file m; /* must be the first element */ 71 struct mnt_namespace *ns; 72 struct path root; 73 int (*show)(struct seq_file *, struct vfsmount *); 74 }; 75 76 extern const struct seq_operations mounts_op; 77