table of contents
| BLK_ADD_REQUEST_PAYL(9) | Block Devices | BLK_ADD_REQUEST_PAYL(9) |
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.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |