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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:52 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:52 +0000 |
commit | ca67b09c015d4af3ae3cce12aa72e60941dbb8b5 (patch) | |
tree | b7316d7b06c373e08dabb79a2c866c568e08f49e /debian/grub-extras/disabled/gpxe/src/net/iobpad.c | |
parent | Adding upstream version 2.06. (diff) | |
download | grub2-bafc013329a13adbaa9197af5fe05f3de46216c8.tar.xz grub2-bafc013329a13adbaa9197af5fe05f3de46216c8.zip |
Adding debian version 2.06-13+deb12u1.debian/2.06-13+deb12u1debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | debian/grub-extras/disabled/gpxe/src/net/iobpad.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/debian/grub-extras/disabled/gpxe/src/net/iobpad.c b/debian/grub-extras/disabled/gpxe/src/net/iobpad.c new file mode 100644 index 0000000..cbae221 --- /dev/null +++ b/debian/grub-extras/disabled/gpxe/src/net/iobpad.c @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/** + * @file + * + * I/O buffer padding + * + */ + +#include <string.h> +#include <gpxe/iobuf.h> + +/** + * Pad I/O buffer + * + * @v iobuf I/O buffer + * @v min_len Minimum length + * + * This function pads and aligns I/O buffers, for devices that + * aren't capable of padding in hardware, or that require specific + * alignment in TX buffers. The packet data will end up aligned to a + * multiple of @c IOB_ALIGN. + * + * @c min_len must not exceed @v IOB_ZLEN. + */ +void iob_pad ( struct io_buffer *iobuf, size_t min_len ) { + void *data; + size_t len; + size_t headroom; + signed int pad_len; + + assert ( min_len <= IOB_ZLEN ); + + /* Move packet data to start of I/O buffer. This will both + * align the data (since I/O buffers are aligned to + * IOB_ALIGN) and give us sufficient space for the + * zero-padding + */ + data = iobuf->data; + len = iob_len ( iobuf ); + headroom = iob_headroom ( iobuf ); + iob_push ( iobuf, headroom ); + memmove ( iobuf->data, data, len ); + iob_unput ( iobuf, headroom ); + + /* Pad to minimum packet length */ + pad_len = ( min_len - iob_len ( iobuf ) ); + if ( pad_len > 0 ) + memset ( iob_put ( iobuf, pad_len ), 0, pad_len ); +} |