blk_add_request_payload (9) - Linux Man Pages

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, int offset, 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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