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author | Amit Shah | 2010-04-27 14:34:05 +0200 |
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committer | Anthony Liguori | 2010-04-28 15:58:22 +0200 |
commit | e4d5639dbb6181ebbfdb554f2594721b2d63882b (patch) | |
tree | 1ad23eabc520022e909e73bbc3affbdfca4cc25f /hw/iov.h | |
parent | virtio-serial: Send out guest data to ports only if port is opened (diff) | |
download | qemu-e4d5639dbb6181ebbfdb554f2594721b2d63882b.tar.gz qemu-e4d5639dbb6181ebbfdb554f2594721b2d63882b.tar.xz qemu-e4d5639dbb6181ebbfdb554f2594721b2d63882b.zip |
iov: Introduce a new file for helpers around iovs, add iov_from_buf()
The virtio-net code uses iov_fill() which fills an iov from a linear
buffer. The virtio-serial-bus code does something similar in an
open-coded function.
Create a new iov.c file that has iov_from_buf().
Convert virtio-net and virtio-serial-bus over to use this functionality.
virtio-net used ints to hold sizes, the new function is going to use
size_t types.
Later commits will add the opposite functionality -- going from an iov
to a linear buffer.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/iov.h')
-rw-r--r-- | hw/iov.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/hw/iov.h b/hw/iov.h new file mode 100644 index 0000000000..5e3e54123d --- /dev/null +++ b/hw/iov.h @@ -0,0 +1,16 @@ +/* + * Helpers for getting linearized buffers from iov / filling buffers into iovs + * + * Copyright (C) 2010 Red Hat, Inc. + * + * Author(s): + * Amit Shah <amit.shah@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ + +#include "qemu-common.h" + +size_t iov_from_buf(struct iovec *iov, unsigned int iovcnt, + const void *buf, size_t size); |