Function report |
Source Code:fs\iomap\seek.c |
Create Date:2022-07-28 20:32:20 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name: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.
Proto:static loff_t page_cache_seek_hole_data(struct inode *inode, loff_t offset, loff_t length, int whence)
Type:loff_t
Parameter:
Type | Parameter | Name |
---|---|---|
struct inode * | inode | |
loff_t | offset | |
loff_t | length | |
int | whence |
78 | end = DIV_ROUND_UP(offset + length, PAGE_SIZE) |
85 | pagevec_init( & pvec) |
87 | Do |
92 | If nr_pages == 0 Then Break |
102 | pagevec_release( & pvec) |
106 | If whence != seek to the next hole Then Go to not_found |
109 | check_range : |
112 | not_found : |
114 | out : |
115 | pagevec_release( & pvec) |
116 | Return lastoff |
Name | Describe |
---|---|
iomap_seek_hole_actor | |
iomap_seek_data_actor |
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