Function krping_write

freebsd/contrib/rdma/krping/krping_dev.c:168–214

}

static int
krping_write(struct cdev *dev, struct uio *uio, int ioflag)
{
	int err = 0;
	int amt;
	int remain = BUFFERSIZE;
	char *cp;
	krping_t *krpingmsg;

	krpingmsg = malloc(sizeof *krpingmsg, M_DEVBUF, M_WAITOK|M_ZERO);
	if (!krpingmsg) {
		uprintf("Could not malloc mem!\n");
		return ENOMEM;
	}

	cp = krpingmsg->msg;
	while (uio->uio_resid) {
		amt = MIN(uio->uio_resid, remain);
		if (amt == 0)
			break;

		/* Copy the string in from user memory to kernel memory */
		err = uiomove(cp, amt, uio);
		if (err) {
			uprintf("Write failed: bad address!\n");
			goto done;
		}
		cp += amt;
		remain -= amt;
	}

	if (uio->uio_resid != 0) {
		uprintf("Message too big. max size is %d!\n", BUFFERSIZE);
		err = EMSGSIZE;
		goto done;
	}

	/* null terminate and remove the \n */
	cp--;
	*cp = 0;
	krpingmsg->len = (unsigned long)(cp - krpingmsg->msg);
	uprintf("krping: write string = |%s|\n", krpingmsg->msg);
	err = krping_doit(krpingmsg->msg);
done:
	free(krpingmsg, M_DEVBUF);
	return(err);
}

static void
krping_purge(struct cdev *dev __unused)