nilfs2: accept future revisions

Compatibility of nilfs partitions is now managed with three feature
sets.  This changes old compatibility check with revision number so
that it can accept future revisions.

Note that we can stop support of experimental versions of nilfs that
doesn't know the feature sets by incrementing NILFS_CURRENT_REV.  We
don't have to do it soon, but it would be a possible option whenever
the need arises.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index ba7c10c917f..461b7211e14 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -468,8 +468,8 @@ static unsigned long long nilfs_max_size(unsigned int blkbits)
 static int nilfs_store_disk_layout(struct the_nilfs *nilfs,
                                    struct nilfs_super_block *sbp)
 {
-        if (le32_to_cpu(sbp->s_rev_level) != NILFS_CURRENT_REV) {
-                printk(KERN_ERR "NILFS: revision mismatch "
+        if (le32_to_cpu(sbp->s_rev_level) < NILFS_MIN_SUPP_REV) {
+                printk(KERN_ERR "NILFS: unsupported revision "
                        "(superblock rev.=%d.%d, current rev.=%d.%d). "
                        "Please check the version of mkfs.nilfs.\n",
                        le32_to_cpu(sbp->s_rev_level),