[PATCH v3 11/27] ubifs: copy some important functions in key.h from kernel to ubifs-utils

[Dongsheng Yang]

We need some more functions in key.h, then copy it from kernel.

Signed-off-by: Dongsheng Yang <yangds.fnst at cn.fujitsu.com>
---
 ubifs-utils/include/key.h | 76 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

diff --git a/ubifs-utils/include/key.h b/ubifs-utils/include/key.h
index 39379fd..1b61928 100644
--- a/ubifs-utils/include/key.h
+++ b/ubifs-utils/include/key.h
@@ -37,6 +37,8 @@
 #ifndef __UBIFS_KEY_H__
 #define __UBIFS_KEY_H__
 
+#include "defs.h"
+
 /**
  * key_mask_hash - mask a valid hash value.
  * @val: value to be masked
@@ -107,7 +109,7 @@ static inline void ino_key_init(union ubifs_key *key, ino_t inum)
  * @inum: parent inode number
  * @nm: direntry name and length
  */
-static inline void dent_key_init(const struct ubifs_info *c,
+static inline void dent_key_init(const struct ubifs_info *c __attribute__((unused)),
 				 union ubifs_key *key, ino_t inum,
 				 const struct qstr *nm)
 {
@@ -204,4 +206,76 @@ static inline int keys_cmp(const union ubifs_key *key1,
 	return 0;
 }
 
+/**
+ * key_read - transform a key to in-memory format.
+ * @c: UBIFS file-system description object
+ * @from: the key to transform
+ * @to: the key to store the result
+ */
+static inline void key_read(const struct ubifs_info *c __attribute__((unused)), const void *from,
+			    union ubifs_key *to)
+{
+	const union ubifs_key *f = from;
+
+	to->u32[0] = le32_to_cpu(f->j32[0]);
+	to->u32[1] = le32_to_cpu(f->j32[1]);
+}
+
+/**
+ * invalid_key_init - initialize invalid node key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ *
+ * This is a helper function which marks a @key object as invalid.
+ */
+static inline void invalid_key_init(const struct ubifs_info *c __attribute__((unused)),
+				    union ubifs_key *key)
+{
+	key->u32[0] = 0xDEADBEAF;
+	key->u32[1] = UBIFS_INVALID_KEY;
+}
+/**
+ * key_type - get key type.
+ * @c: UBIFS file-system description object
+ * @key: key to get type of
+ */
+static inline int key_type(const struct ubifs_info *c __attribute__((unused)),
+			   const union ubifs_key *key)
+{
+	return key->u32[1] >> UBIFS_S_KEY_BLOCK_BITS;
+}
+
+/*
+ * key_hash - get directory entry hash.
+ * @c: UBIFS file-system description object
+ * @key: the key to get hash from
+ */
+static inline uint32_t key_hash(const struct ubifs_info *c __attribute__((unused)),
+				const union ubifs_key *key)
+{
+	return key->u32[1] & UBIFS_S_KEY_HASH_MASK;
+}
+
+/**
+ * key_inum - fetch inode number from key.
+ * @c: UBIFS file-system description object
+ * @k: key to fetch inode number from
+ */
+static inline ino_t key_inum(const struct ubifs_info *c __attribute__((unused)), const void *k)
+{
+	const union ubifs_key *key = k;
+
+	return key->u32[0];
+}
+
+/**
+ * key_block - get data block number.
+ * @c: UBIFS file-system description object
+ * @key: the key to get the block number from
+ */
+static inline unsigned int key_block(const struct ubifs_info *c __attribute__((unused)),
+				     const union ubifs_key *key)
+{
+	return key->u32[1] & UBIFS_S_KEY_BLOCK_MASK;
+}
 #endif /* !__UBIFS_KEY_H__ */
-- 
1.8.4.2