Subject: [PATCH] ext4: cache on-disk inode version in ext4_inode_info

For use in lustre ldiskfs transaction handling
---
 fs/ext4/ext4.h   | 2 ++
 fs/ext4/ialloc.c | 1 +
 fs/ext4/inode.c  | 4 ++--
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 0e2a7f5..271f96d 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1099,6 +1099,8 @@ struct ext4_inode_info {
 	struct dquot *i_dquot[MAXQUOTAS];
 #endif
 
+	__u64 i_fs_version;
+
 	/* Precomputed uuid+inum+igen checksum for seeding inode checksums */
 	__u32 i_csum_seed;
 
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index fe1fee9..4da98da 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1063,6 +1063,7 @@ got:
 	ei->i_dtime = 0;
 	ei->i_block_group = group;
 	ei->i_last_alloc_group = ~0;
+	ei->i_fs_version = 0;
 
 	ext4_set_inode_flags(inode);
 	if (IS_DIRSYNC(inode))
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 6b15a3a..9ab0039 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4886,7 +4886,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
 				ivers |=
 		    (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
 		}
-		inode_set_iversion_queried(inode, ivers);
+		ei->i_fs_version = ivers;
 	}
 
 	ret = 0;
@@ -5170,7 +5170,7 @@ static int ext4_do_update_inode(handle_t *handle,
 	}
 
 	if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
-		u64 ivers = inode_peek_iversion(inode);
+		u64 ivers = cpu_to_le32(ei->i_fs_version);
 
 		raw_inode->i_disk_version = cpu_to_le32(ivers);
 		if (ei->i_extra_isize) {
-- 
2.20.1