From 5d074a4f8005b988c9d48d29250e36ad64083252 Mon Sep 17 00:00:00 2001
From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 20 May 2014 07:46:55 +1000
Subject: xfs: don't need dirv2 checks anymore

If the the V2 directory feature bit is not set in the superblock
feature mask the filesystem will fail the good version check.
Hence we don't need any other version checking on the dir2 feature
bit in the code as the filesystem will not mount without it set.
Remove the checking code.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index fda4625..0c8ba87 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -92,7 +92,7 @@ xfs_dir_mount(
 	int	nodehdr_size;
 
 
-	ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb));
+	ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 	ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <=
 	       XFS_MAX_BLOCKSIZE);
 
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index d49c67a..b19b015 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -75,6 +75,7 @@ xfs_fs_geometry(
 	if (new_version >= 3) {
 		geo->version = XFS_FSOP_GEOM_VERSION;
 		geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
+			     XFS_FSOP_GEOM_FLAGS_DIRV2 |
 			(xfs_sb_version_hasattr(&mp->m_sb) ?
 				XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
 			(xfs_sb_version_hasquota(&mp->m_sb) ?
@@ -87,8 +88,6 @@ xfs_fs_geometry(
 				XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
 			(xfs_sb_version_hasextflgbit(&mp->m_sb) ?
 				XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
-			(xfs_sb_version_hasdirv2(&mp->m_sb) ?
-				XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
 			(xfs_sb_version_hassector(&mp->m_sb) ?
 				XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
 			(xfs_sb_version_hasasciici(&mp->m_sb) ?
diff --git a/fs/xfs/xfs_sb.c b/fs/xfs/xfs_sb.c
index 8baf61a..de16dd5 100644
--- a/fs/xfs/xfs_sb.c
+++ b/fs/xfs/xfs_sb.c
@@ -333,15 +333,6 @@ xfs_mount_validate_sb(
 		xfs_warn(mp, "Offline file system operation in progress!");
 		return XFS_ERROR(EFSCORRUPTED);
 	}
-
-	/*
-	 * Version 1 directory format has never worked on Linux.
-	 */
-	if (unlikely(!xfs_sb_version_hasdirv2(sbp))) {
-		xfs_warn(mp, "file system using version 1 directory format");
-		return XFS_ERROR(ENOSYS);
-	}
-
 	return 0;
 }
 
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h
index a2826cf..822e628 100644
--- a/fs/xfs/xfs_sb.h
+++ b/fs/xfs/xfs_sb.h
@@ -403,12 +403,6 @@ static inline bool xfs_sb_version_hasshared(struct xfs_sb *sbp)
 		(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 }
 
-static inline bool xfs_sb_version_hasdirv2(struct xfs_sb *sbp)
-{
-	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
-	       (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
-}
-
 static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp)
 {
 	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
-- 
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