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Diffstat (limited to 'lib/libefivar/efivar-dp.h')
-rw-r--r-- | lib/libefivar/efivar-dp.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/lib/libefivar/efivar-dp.h b/lib/libefivar/efivar-dp.h new file mode 100644 index 0000000..94dd118 --- /dev/null +++ b/lib/libefivar/efivar-dp.h @@ -0,0 +1,65 @@ +/*- + * Copyright (c) 2017 Netflix, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _EFIVAR_DP_H_ +#define _EFIVAR_DP_H_ + +/* + * "Linux compatible" efivar-dp.h header. At the moment, it's really a + * very thin, minimal interface. + */ + +/* + * Generic EFI_DEVICE_PATH, spelled the Linux way. We use this + * interface to the outside world and type-pun to the EFI EDK2 code + * we use to implement it. + */ +typedef struct { + uint8_t type; + uint8_t subtype; + uint16_t length; +} __packed efidp_header; + +/* NB: Linux has shadow types for all dp type */ + +typedef union { + efidp_header header; +} efidp_data; +typedef efidp_data *efidp; +typedef const efidp_data *const_efidp; + +/** format a device path into UEFI standard conforming output. + * + * NB: FreeBSD's implementation is taken from EDK2, while Linux's + * was hand-rolled. There may be differences as a result. + */ +ssize_t efidp_format_device_path(char *buf, size_t len, const_efidp dp, + ssize_t max); +ssize_t efidp_parse_device_path(char *path, efidp out, size_t max); + +#endif /* _EFIVAR_DP_H_ */ |