Merge branch 'overlayfs-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mszere...

[firefly-linux-kernel-4.4.55.git] / include / linux / f2fs_fs.h

diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 87f14e90e9848904da0cc326d17096f1ce6049f5..a23556c32703aa9e6563e777853e270f80d03712 100644 (file)
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -19,12 +19,16 @@
 #define F2FS_MAX_LOG_SECTOR_SIZE       12      /* 12 bits for 4096 bytes */
 #define F2FS_LOG_SECTORS_PER_BLOCK     3       /* log number for sector/blk */
 #define F2FS_BLKSIZE                   4096    /* support only 4KB block */
+#define F2FS_BLKSIZE_BITS              12      /* bits for F2FS_BLKSIZE */
 #define F2FS_MAX_EXTENSION             64      /* # of extension entries */
 #define F2FS_BLK_ALIGN(x)      (((x) + F2FS_BLKSIZE - 1) / F2FS_BLKSIZE)
 
 #define NULL_ADDR              ((block_t)0)    /* used as block_t addresses */
 #define NEW_ADDR               ((block_t)-1)   /* used as block_t addresses */
 
+#define F2FS_BYTES_TO_BLK(bytes)       ((bytes) >> F2FS_BLKSIZE_BITS)
+#define F2FS_BLK_TO_BYTES(blk)         ((blk) << F2FS_BLKSIZE_BITS)
+
 /* 0, 1(node nid), 2(meta nid) are reserved node id */
 #define F2FS_RESERVED_NODE_NUM         3
 
@@ -87,6 +91,7 @@ struct f2fs_super_block {
 /*
  * For checkpoint
  */
+#define CP_FASTBOOT_FLAG       0x00000020
 #define CP_FSCK_FLAG           0x00000010
 #define CP_ERROR_FLAG          0x00000008
 #define CP_COMPACT_SUM_FLAG    0x00000004
@@ -224,6 +229,8 @@ enum {
        OFFSET_BIT_SHIFT
 };
 
+#define OFFSET_BIT_MASK                (0x07)  /* (0x01 << OFFSET_BIT_SHIFT) - 1 */
+
 struct node_footer {
        __le32 nid;             /* node id */
        __le32 ino;             /* inode nunmber */