函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\buffer.c Create Date:2022-07-29 10:45:17
Last Modify:2020-03-18 10:38:29 Copyright©Brick
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函数名称：__block_commit_write

函数原型：static int __block_commit_write(struct inode *inode, struct page *page, unsigned from, unsigned to)

返回类型：int

参数：

类型参数名称
struct inode *inode
struct page *page
unsignedfrom
unsignedto
2066  partial等于0
2070  bh等于head等于If we *know* page->private refers to buffer_heads (page)
2071  blocksize等于 size of mapping
2073  block_start等于0
2074  循环
2075  block_end等于block_start加blocksize
2076  如果block_end小于等于from或block_start大于等于to则
2077  如果非Emit the buffer bitops functions. Note that there are also functions* of the form "mark_buffer_foo()". These are higher-level functions which* do something in addition to setting a b_state bit.则partial等于1
2079  否则
2080  Emit the buffer bitops functions. Note that there are also functions* of the form "mark_buffer_foo()". These are higher-level functions which* do something in addition to setting a b_state bit.
2081  mark_buffer_dirty - mark a buffer_head as needing writeout*@bh: the buffer_head to mark dirty* mark_buffer_dirty() will set the dirty bit against the buffer, then set* its backing page dirty, then tag the page as dirty in the page cache* and then attach
2083  clear_buffer_new(bh)
2085  block_start等于block_end
2086  bh等于 circular list of page's buffers
2087  当bh不等于head循环
2095  如果非partial则SetPageUptodate(page)
2097  返回:0
调用者
名称描述
block_write_end
block_commit_write