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| BLK_ADD_REQUEST_PAYL(9) | Block Devices | BLK_ADD_REQUEST_PAYL(9) |
NAME¶
blk_add_request_payload - add a payload to a requestSYNOPSIS¶
void
blk_add_request_payload(struct request * rq,
struct page * page,
int offset,
unsigned int len);
ARGUMENTS¶
rqrequest 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¶
| January 2017 | Kernel Hackers Manual 4.8. |