2 * Copyright (c) 2017 Netflix, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * "Linux compatible" efivar-dp.h header. At the moment, it's really a
34 * very thin, minimal interface.
38 * Generic EFI_DEVICE_PATH, spelled the Linux way. We use this
39 * interface to the outside world and type-pun to the EFI EDK2 code
40 * we use to implement it.
46 } __packed efidp_header;
48 /* NB: Linux has shadow types for all dp type */
53 typedef efidp_data *efidp;
54 typedef const efidp_data *const_efidp;
56 /** format a device path into UEFI standard conforming output.
58 * NB: FreeBSD's implementation is taken from EDK2, while Linux's
59 * was hand-rolled. There may be differences as a result.
61 ssize_t efidp_format_device_path(char *buf, size_t len, const_efidp dp,
63 ssize_t efidp_format_device_path_node(char *buf, size_t len, const_efidp dp);
64 ssize_t efidp_parse_device_path(char *path, efidp out, size_t max);
65 char * efidp_extract_file_path(const_efidp dp);
67 size_t efidp_size(const_efidp);
69 int efivar_device_path_to_unix_path(const_efidp dp, char **dev, char **relpath, char **abspath);
70 int efivar_unix_path_to_device_path(const char *path, efidp *dp);
72 #endif /* _EFIVAR_DP_H_ */