blk_add_request_payload (9) - Linux Manuals
blk_add_request_payload: add a payload to a request
NAME
blk_add_request_payload - add a payload to a request
SYNOPSIS
-
void blk_add_request_payload(struct request
* rq, struct page* page, intoffset, unsigned int len);
ARGUMENTS
rq
-
- request to update
page
- page backing the payload
offset
- offset in page
len
- length of the payload.
DESCRIPTION
This allows to later add a payload to an already submitted request by a block driver. The driver needs to take care of freeing the payload itself.
Note that this is a quite horrible hack and nothing but handling of discard requests should ever use it.
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