Function report |
Source Code:fs\buffer.c |
Create Date:2022-07-28 20:14:09 |
Last Modify:2020-03-18 10:38:29 | Copyright©Brick |
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Name:Perform a pagecache lookup for the matching buffer. If it's there, refresh* it in the LRU and mark it as accessed. If it is not present then return* NULL
Proto:struct buffer_head *__find_get_block(struct block_device *bdev, sector_t block, unsigned size)
Type:struct buffer_head
Parameter:
Type | Parameter | Name |
---|---|---|
struct block_device * | bdev | |
sector_t | block | |
unsigned | size |
1334 | If (bh == NULL) Then |
1339 | Else touch_buffer(bh) |
1342 | Return bh |
Name | Describe |
---|---|
write_boundary_block | Called when we've recently written block `bblock', and it is known that* `bblock' was for a buffer_boundary() buffer. This means that the block at* `bblock + 1' is probably a dirty indirect block. Hunt it down and, if it's* dirty, schedule it for IO |
__getblk_slow | |
__getblk_gfp | __getblk_gfp() will locate (and, if necessary, create) the buffer_head* which corresponds to the passed block_device, block and size. The* returned buffer has its reference count incremented.* __getblk_gfp() will lock up the machine if grow_dev_page's |
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