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efidp_size will return the size, in bytes, of a EFI device path structure. This is a convenience wrapper in the same style as the other linux routines. It's implemented by GetDevicePathSize from EDK2 we already needed for other things. Sponsored by: Netflix
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*-
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* Copyright (c) 2017 Netflix, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _EFIVAR_DP_H_
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#define _EFIVAR_DP_H_
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/*
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* "Linux compatible" efivar-dp.h header. At the moment, it's really a
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* very thin, minimal interface.
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*/
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/*
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* Generic EFI_DEVICE_PATH, spelled the Linux way. We use this
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* interface to the outside world and type-pun to the EFI EDK2 code
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* we use to implement it.
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*/
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typedef struct {
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uint8_t type;
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uint8_t subtype;
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uint16_t length;
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} __packed efidp_header;
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/* NB: Linux has shadow types for all dp type */
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typedef union {
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efidp_header header;
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} efidp_data;
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typedef efidp_data *efidp;
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typedef const efidp_data *const_efidp;
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/** format a device path into UEFI standard conforming output.
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*
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* NB: FreeBSD's implementation is taken from EDK2, while Linux's
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* was hand-rolled. There may be differences as a result.
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*/
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ssize_t efidp_format_device_path(char *buf, size_t len, const_efidp dp,
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ssize_t max);
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ssize_t efidp_parse_device_path(char *path, efidp out, size_t max);
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size_t efidp_size(const_efidp);
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#endif /* _EFIVAR_DP_H_ */
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