Scroll to navigation

GET_REQUEST(9) Block Devices GET_REQUEST(9)

NAME

get_request - get a free request

SYNOPSIS

struct request * get_request(struct request_queue * q, int op, int op_flags, struct bio * bio, gfp_t gfp_mask);

ARGUMENTS

q
request_queue to allocate request from
op
REQ_OP_READ/REQ_OP_WRITE
op_flags
rq_flag_bits
bio
bio to allocate request for (can be NULL)
gfp_mask
allocation mask

DESCRIPTION

Get a free request from q. If __GFP_DIRECT_RECLAIM is set in gfp_mask, this function keeps retrying under memory pressure and fails iff q is dead.
Must be called with q->queue_lock held and, Returns ERR_PTR on failure, with q->queue_lock held. Returns request pointer on success, with q->queue_lock *not held*.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.