Name
bio_copy_user —
copy user data to bio
Synopsis
struct bio * fsfuncbio_copy_user ( | struct request_queue * q, |
| | struct rq_map_data * map_data, |
| | unsigned long uaddr, |
| | unsigned int len, |
| | int write_to_vm, |
| | gfp_t gfp_mask); |
Arguments
q
destination block queue
map_data
pointer to the rq_map_data holding pages (if necessary)
uaddr
start of user address
len
length in bytes
write_to_vm
bool indicating writing to pages or not
gfp_mask
memory allocation flags
Description
Prepares and returns a bio for indirect user io, bouncing data
to/from kernel pages as necessary. Must be paired with
call bio_uncopy_user on io completion.