IOVEC(9S) Data Structures for Drivers IOVEC(9S)

iovec —
data storage structure for I/O using uio

#include <sys/uio.h>

Architecture independent level 1 (DDI/DKI).

An iovec structure describes a data storage area for transfer in a uio(9S) structure. Conceptually, it can be thought of as a base address and length specification. 

caddr_t    iov_base;  /* base address of the data storage area */
                      /* represented by the iovec structure */
int        iov_len;   /* size of the data storage area in bytes */

uio(9S)

Writing Device Drivers.

July 9, 2018 illumos