PFK: new module to work with ecryptfs

PFK is a new module that accompanies eCryptfs and
enables it to utilize ICE hw encryption engine. Module
is responsible for storing encryption/decryption keys
inside eCryptfs inodes for each file and loading them
to ICE

Change-Id: I6e755ca657164919147fe0d9482477e14a4be5eb
Signed-off-by: Andrey Markovytch <andreym@codeaurora.org>
[gbroner@codeaurora.org: fix merge conflicts, adapted LSM hooks
and added missing qseecom headers to fix compilation]
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/include/linux/pfk.h b/include/linux/pfk.h
new file mode 100644
index 000000000000..f492d758291e
--- /dev/null
+++ b/include/linux/pfk.h
@@ -0,0 +1,50 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#ifndef PFK_H_
+#define PFK_H_
+
+#include <linux/bio.h>
+
+struct ice_crypto_setting;
+
+#ifdef CONFIG_PFK
+
+int pfk_load_key(const struct bio *bio, struct ice_crypto_setting *ice_setting);
+int pfk_remove_key(const unsigned char *key, size_t key_size);
+bool pfk_allow_merge_bio(struct bio *bio1, struct bio *bio2);
+
+#else
+static inline int pfk_load_key(const struct bio *bio,
+		struct ice_crypto_setting *ice_setting)
+{
+	return -ENODEV;
+}
+
+static inline int pfk_remove_key(const unsigned char *key, size_t key_size)
+{
+	return -ENODEV;
+}
+
+static inline bool pfk_allow_merge_bio(const struct bio *bio1,
+		const struct bio *bio2)
+{
+	return true;
+}
+
+static inline void pfk_remove_all_keys(void)
+{
+}
+
+#endif /* CONFIG_PFK */
+
+#endif /* PFK_H */