f2fs: add missing version info in superblock

The mkfs.f2fs remains kernel version in superblock, but f2fs module has not
added that so far.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 591f8c3ef41091c30bc8eadbbe10ffecf232ad9a..8d345c24bcf7e3a459bb5319f3e9e67bf4417b05 100644 (file)
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -50,6 +50,8 @@
 #define MAX_ACTIVE_NODE_LOGS   8
 #define MAX_ACTIVE_DATA_LOGS   8
 
+#define VERSION_LEN    256
+
 /*
  * For superblock
  */
@@ -86,6 +88,9 @@ struct f2fs_super_block {
        __le32 extension_count;         /* # of extensions below */
        __u8 extension_list[F2FS_MAX_EXTENSION][8];     /* extension array */
        __le32 cp_payload;
+       __u8 version[VERSION_LEN];      /* the kernel version */
+       __u8 init_version[VERSION_LEN]; /* the initial kernel version */
+       __u8 reserved[892];             /* valid reserved region */
 } __packed;
 
 /*