Function report |
Source Code:fs\buffer.c |
Create Date:2022-07-28 20:14:10 |
Last Modify:2020-03-18 10:38:29 | Copyright©Brick |
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Name:If a page has any new buffers, zero them out here, and mark them uptodate* and dirty so they'll be written out (in order to prevent uninitialised* block data from leaking). And clear the new bit.
Proto:void page_zero_new_buffers(struct page *page, unsigned from, unsigned to)
Type:void
Parameter:
Type | Parameter | Name |
---|---|---|
struct page * | page | |
unsigned | from | |
unsigned | to |
1883 | BUG_ON(!PageLocked(page)) |
1884 | If Not page_has_buffers(page) Then Return |
1888 | block_start = 0 |
1889 | Do |
1890 | block_end = block_start + size of mapping |
1892 | If buffer_new(bh) Then |
1893 | If block_end > from && block_start < to Then |
1894 | If Not PageUptodate(page) Then |
1897 | start = max - return maximum of two values of the same or compatible types*@x: first value*@y: second value(from, block_start) |
1904 | clear_buffer_new(bh) |
1909 | block_start = block_end |
Name | Describe |
---|---|
__block_write_begin_int | |
block_write_end | |
nobh_write_begin | On entry, the page is fully not uptodate.* On exit the page is fully uptodate in the areas outside (from,to)* The filesystem needs to handle block truncation upon failure. |
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