MFC efivar(8) (by imp):

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Discussed with:	gjb (re), imp
Sponsored by:	The FreeBSD Foundation

1 files changed, 135 insertions, 0 deletions

diff --git a/lib/libefivar/efivar.h b/lib/libefivar/efivar.h
new file mode 100644
index 0000000..cba8a8e
--- /dev/null
+++ b/lib/libefivar/efivar.h
@@ -0,0 +1,135 @@
+/*-
+ * Copyright (c) 2016 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_H_
+#define	_EFIVAR_H_
+
+#include <uuid.h>
+#include <sys/efi.h>
+#include <sys/endian.h>
+#include <stdint.h>
+
+/* Shoud these be elsewhere ? */
+#define	EFI_VARIABLE_NON_VOLATILE		0x00000001
+#define	EFI_VARIABLE_BOOTSERVICE_ACCESS		0x00000002
+#define	EFI_VARIABLE_RUNTIME_ACCESS		0x00000004
+#define	EFI_VARIABLE_HARDWARE_ERROR_RECORD	0x00000008
+#define	EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS	0x00000010
+#define	EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS \
+						0x00000020
+#define	EFI_VARIABLE_APPEND_WRITE		0x00000040
+#if 0 /* todo */
+#define	EFI_VARIABLE_HAS_AUTH_HEADER
+#define EFI_VARIABLE_HAS_SIGNATURE
+#endif
+
+
+#ifndef _EFIVAR_EFI_GUID_T_DEF
+#define _EFIVAR_EFI_GUID_T_DEF
+typedef uuid_t efi_guid_t;
+#endif
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define	EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5)			\
+	((efi_guid_t) {(a), (b), (c), (d) >> 8, (d) & 0xff,		\
+	{ (e0), (e1), (e2), (e3), (e4), (e5) }})
+#else
+#define	EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5)			\
+	((efi_guid_t) {(a), (b), (c), (d) & 0xff, (d) >> 8,		\
+	{ (e0), (e1), (e2), (e3), (e4), (e5) }})
+#endif
+
+#define EFI_GLOBAL_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa0d, \
+    0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)
+
+int efi_append_variable(efi_guid_t guid, const char *name,
+    uint8_t *data, size_t data_size, uint32_t attributes);
+int efi_del_variable(efi_guid_t guid, const char *name);
+int efi_get_variable(efi_guid_t guid, const char *name,
+    uint8_t **data, size_t *data_size, uint32_t *attributes);
+int efi_get_variable_attributes(efi_guid_t guid, const char *name,
+    uint32_t *attributes);
+int efi_get_variable_size(efi_guid_t guid, const char *name, size_t *size);
+int efi_get_next_variable_name(efi_guid_t **guid, char **name);
+int efi_guid_cmp(const efi_guid_t *guid1, const efi_guid_t *guid2);
+int efi_guid_is_zero(const efi_guid_t *guid1);
+int efi_guid_to_name(efi_guid_t *guid, char **name);
+int efi_guid_to_symbol(efi_guid_t *guid, char **symbol);
+int efi_guid_to_str(const efi_guid_t *guid, char **sp);
+int efi_name_to_guid(const char *name, efi_guid_t *guid);
+int efi_set_variable(efi_guid_t guid, const char *name,
+    uint8_t *data, size_t data_size, uint32_t attributes, mode_t mode);
+int efi_str_to_guid(const char *s, efi_guid_t *guid);
+int efi_variables_supported(void);
+
+/* FreeBSD extensions */
+struct uuid_table
+{
+	const char *uuid_str;
+	const char *name;
+	efi_guid_t guid;
+};
+
+int efi_known_guid(struct uuid_table **);
+
+extern const efi_guid_t efi_guid_empty;
+
+/* Stubs that are expected, but aren't really used */
+static inline int
+efi_error_get(unsigned int n __unused, char ** const fn __unused,
+    char ** const func __unused, int *line __unused,
+    char ** const msg __unused, int *err __unused)
+{
+	return 0;
+}
+
+static inline int
+efi_error_set(const char *fn __unused, const char *func __unused,
+    int line __unused, int err __unused, const char *fmt __unused, ...)
+{
+	return 0;
+}
+
+static inline void
+efi_error_clear(void)
+{
+}
+
+static inline int
+efi_error(const char *fmt __unused, ...)
+{
+	return 0;
+}
+
+static inline int
+efi_error_val(int val __unused, const char *fmt __unused, ...)
+{
+	return 0;
+}
+
+#endif /* _EFIVAR_H_ */