GENERIC_MAKE_REQUEST(9) Block Devices GENERIC_MAKE_REQUEST(9)
NAME
generic_make_request - hand a buffer to its device driver for I/O
SYNOPSIS
void generic_make_request(struct bio * bio);
ARGUMENTS
bio
The bio describing the location in memory and on the device.
DESCRIPTION
generic_make_request is used to make I/O requests of block devices. It is passed a struct bio, which describes the I/O that needs to be
done.
generic_make_request does not return any status. The success/failure status of the request, along with notification of completion, is
delivered asynchronously through the bio->bi_end_io function described (one day) else where.
The caller of generic_make_request must make sure that bi_io_vec are set to describe the memory buffer, and that bi_dev and bi_sector are
set to describe the device address, and the bi_end_io and optionally bi_private are set to describe how completion notification should be
signaled.
generic_make_request and the drivers it calls may use bi_next if this bio happens to be merged with someone else, and may resubmit the bio
to a lower device by calling into generic_make_request recursively, which means the bio should NOT be touched after the call to
->make_request_fn.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 GENERIC_MAKE_REQUEST(9)
