page_offset

函数名称：Return byte-offset into filesystem object for page.

函数原型：static inline loff_t page_offset(struct page *page)

返回类型：loff_t

参数：

类型	参数	名称
struct page *	page

436

返回: Our offset within mapping. 左移PAGE_SHIFT determines the page size 位

**调用者**
名称	描述
block_page_mkwrite	lock_page_mkwrite() is not allowed to change the file size as it gets* called from a page fault handler when a page is first dirtied
iomap_readpage
iomap_next_page
iomap_readpages
iomap_page_mkwrite
iomap_writepage_map	We implement an immediate ioend submission policy here to avoid needing to* chain multiple ioends and hence nest mempool allocations which can violate* forward progress guarantees we need to provide
page_seek_hole_data	Seek for SEEK_DATA / SEEK_HOLE within @page, starting at @lastoff.* Returns true if found and updates @lastoff to the offset in file.
page_cache_seek_hole_data	Seek for SEEK_DATA / SEEK_HOLE in the page cache.* Within unwritten extents, the page cache determines which parts are holes* and which are data: uptodate buffer heads count as data; everything else* counts as a hole.

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码