[EXT4 set 4][PATCH 2/5] i_version: Add hi 32 bit inode version on ext4 on-disk inode

[Mingming Cao]

This patch adds a 32-bit i_version_hi field to ext4_inode, which can be used for 64-bit inode versions. This field will store the higher 32 bits of the version, while Jean Noel's patch has added support to store the lower 32-bits in osd1.linux1.l_i_version.

Signed-off-by: Mingming Cao <cmm at us.ibm.com>
Signed-off-by: Andreas Dilger <adilger at clusterfs.com>
Signed-off-by: Kalpak Shah <kalpak at clusterfs.com>
---
Index: linux-2.6.21/include/linux/ext4_fs.h
===================================================================
--- linux-2.6.21.orig/include/linux/ext4_fs.h
+++ linux-2.6.21/include/linux/ext4_fs.h
@@ -342,6 +342,7 @@ struct ext4_inode {
 	__le32  i_atime_extra;  /* extra Access time      (nsec << 2 | epoch) */
 	__le32  i_crtime;       /* File Creation time */
 	__le32  i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
+	__le32	i_version_hi;	/* high 32 bits for 64-bit version */
 };

 #define i_size_high	i_dir_acl