该结构体在x210kernel/include/linux/fs.h文件中定义。 

struct file {/** fu_list becomes invalid after file_free is called and queued via* fu_rcuhead for RCU freeing*/union {struct list_head	fu_list;struct rcu_head 	fu_rcuhead;} f_u;struct path		f_path;
#define f_dentry	f_path.dentry
#define f_vfsmnt	f_path.mntconst struct file_operations	*f_op;spinlock_t		f_lock;  /* f_ep_links, f_flags, no IRQ */atomic_long_t		f_count;unsigned int 		f_flags;fmode_t			f_mode;loff_t			f_pos;//文件相对于开头的偏移量struct fown_struct	f_owner;const struct cred	*f_cred;struct file_ra_state	f_ra;u64			f_version;
#ifdef CONFIG_SECURITYvoid			*f_security;
#endif/* needed for tty driver, and maybe others */void			*private_data;#ifdef CONFIG_EPOLL/* Used by fs/eventpoll.c to link all the hooks to this file */struct list_head	f_ep_links;
#endif /* #ifdef CONFIG_EPOLL */struct address_space	*f_mapping;
#ifdef CONFIG_DEBUG_WRITECOUNTunsigned long f_mnt_write_state;
#endif
};