UBIFS: add inode size debugging check

Add one more check to UBIFS - a check that makes sure that there
are no data nodes beyond inode size. And few commantaries fixes
along the line.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reviewed-by: Adrian Hunter <Adrian.Hunter@nokia.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h
index 919af84b9e17..0f530c684f0b 100644
--- a/fs/ubifs/key.h
+++ b/fs/ubifs/key.h
@@ -278,6 +278,18 @@ static inline void data_key_init(const struct ubifs_info *c,
 }
 
 /**
+ * highest_data_key - get the highest possible data key for an inode.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: inode number
+ */
+static inline void highest_data_key(const struct ubifs_info *c,
+                                   union ubifs_key *key, ino_t inum)
+{
+        data_key_init(c, key, inum, UBIFS_S_KEY_BLOCK_MASK);
+}
+
+/**
  * trun_key_init - initialize truncation node key.
  * @c: UBIFS file-system description object
  * @key: key to initialize
@@ -518,4 +530,5 @@ static inline unsigned long long key_max_inode_size(const struct ubifs_info *c)
                 return 0;
         }
 }
+
 #endif /* !__UBIFS_KEY_H__ */