2008 May 7th Wednesday (五月　七日　水曜日）_struct module *owner-优快云博客

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本文详细介绍了Linux系统中用于描述文件操作的结构file_operations。该结构定义了一系列文件操作方法，如读取、写入、定位等，并解释了这些方法如何被内核用来处理文件I/O请求。

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structfile_operations{ structmodule*owner; loff_t(*llseek)(struct file*,loff_t,int); ssize_t(*read)(struct file*,char__user*,size_t,loff_t*); ssize_t(*aio_read)(structkiocb*,char__user*,size_t,loff_t); ssize_t(*write)(struct file*,constchar__user*,size_t,loff_t*); ssize_t(*aio_write)(structkiocb*,constchar__user*,size_t,loff_t); int(*readdir)(struct file*,void*,filldir_t); unsignedint(*poll)(struct file*,structpoll_table_struct*); int(*ioctl)(structinode*,struct file*,unsignedint,unsignedlong); int(*mmap)(struct file*,structvm_area_struct*); int(*open)(structinode*,struct file*); int(*flush)(struct file*); int(*release)(structinode*,struct file*); int(*fsync)(struct file*,structdentry*,intdatasync); int(*aio_fsync)(structkiocb*,intdatasync); int(*fasync)(int,struct file*,int); int(*lock)(struct file*,int,structfile_lock*); ssize_t(*readv)(struct file*,conststructiovec*,unsignedlong,loff_t*); ssize_t(*writev)(struct file*,conststructiovec*,unsignedlong,loff_t*); ssize_t(*sendfile)(struct file*,loff_t*,size_t,read_actor_t,void__user*); ssize_t(*sendpage)(struct file*,struct page*,int,size_t,loff_t*,int); unsignedlong(*get_unmapped_area)(struct file*,unsigned long,unsigned long,unsigned long,unsigned long); };