BIO_MAP_USER(9) The Linux VFS BIO_MAP_USER(9)

NAME bio_map_user - map user address into bio

SYNOPSIS struct bio * bio_map_user(struct request_queue * q, struct block_device * bdev, unsigned long uaddr, unsigned int len, int write_to_vm, gfp_t gfp_mask);

ARGUMENTS q the struct request_queue for the bio

bdev destination block device

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 Map the user space address into a bio suitable for io to a block device. Returns an error pointer in case of error.

COPYRIGHT Kernel Hackers Manual 2.6. April 2016 BIO_MAP_USER(9)