函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\splice.c Create Date:2022-07-29 10:42:06
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Check whether the contents of buf is OK to access. Since the content* is a page cache page, IO may be in flight.

函数原型：static int page_cache_pipe_buf_confirm(struct pipe_inode_info *pipe, struct pipe_buffer *buf)

返回类型：int

参数：

类型参数名称
struct pipe_inode_info *pipe
struct pipe_buffer *buf
106  page等于page
109  如果非PageUptodate(page)则
110  lock_page may only be called if we have the page's inode pinned.
116  如果非 See page-flags.h for PAGE_MAPPING_FLAGS 则
117  err等于负ENODATA
118  转到:error
124  如果非PageUptodate(page)则
125  err等于负EIO
126  转到:error
132  lock_page - unlock a locked page*@page: the page* Unlocks the page and wakes up sleepers in ___wait_on_page_locked().* Also wakes sleepers in wait_on_page_writeback() because the wakeup* mechanism between PageLocked pages and PageWriteback pages is shared.
135  返回:0
136  error :
137  lock_page - unlock a locked page*@page: the page* Unlocks the page and wakes up sleepers in ___wait_on_page_locked().* Also wakes sleepers in wait_on_page_writeback() because the wakeup* mechanism between PageLocked pages and PageWriteback pages is shared.
138  返回:err