src/sys/kern/sys_pipe.c - diff

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version 1.20, 2004/05/11 18:05:05	version 1.21, 2004/05/11 22:48:53
Line 635 pipe_build_write_buffer(wpipe, uio)	Line 635 pipe_build_write_buffer(wpipe, uio)
size = (u_int) uio->uio_iov->iov_len;	size = (u_int) uio->uio_iov->iov_len;
if (size > wpipe->pipe_buffer.size)	if (size > wpipe->pipe_buffer.size)
size = wpipe->pipe_buffer.size;	size = wpipe->pipe_buffer.size;
if (size > XIO_INTERNAL_SIZE)
size = XIO_INTERNAL_SIZE;

error = xio_init_ubuf(&wpipe->pipe_map, uio->uio_iov->iov_base,	error = xio_init_ubuf(&wpipe->pipe_map, uio->uio_iov->iov_base,
size, XIOF_READ);	size, XIOF_READ);
Line 652 pipe_build_write_buffer(wpipe, uio)	Line 650 pipe_build_write_buffer(wpipe, uio)
case PIPE_SFBUF2:	case PIPE_SFBUF2:
if (wpipe->pipe_kva == NULL) {	if (wpipe->pipe_kva == NULL) {
wpipe->pipe_kva =	wpipe->pipe_kva =
kmem_alloc_pageable(kernel_map, XIO_INTERNAL_SIZE);	kmem_alloc_nofault(kernel_map, XIO_INTERNAL_SIZE);
wpipe->pipe_kvamask = 0;	wpipe->pipe_kvamask = 0;
}	}
if (wpipe->pipe_feature == PIPE_KMEM) {	if (wpipe->pipe_feature == PIPE_KMEM) {
Line 665 pipe_build_write_buffer(wpipe, uio)	Line 663 pipe_build_write_buffer(wpipe, uio)
}	}

/*	/*
* and update the uio data	* And update the uio data. The XIO might have loaded fewer bytes
	* then requested so reload 'size'.
*/	*/
	size = wpipe->pipe_map.xio_bytes;
uio->uio_iov->iov_len -= size;	uio->uio_iov->iov_len -= size;
uio->uio_iov->iov_base += size;	uio->uio_iov->iov_base += size;
if (uio->uio_iov->iov_len == 0)	if (uio->uio_iov->iov_len == 0)