MFC r306276, but don't remove findwin95

Mount msdosfs with longnames support by default.

The old behavior depended on the FAT version and on what files were in the
root directory. "mount_msdosfs -o shortnames" is still supported.

2 files changed, 3 insertions, 26 deletions

diff --git a/sbin/mount_msdosfs/mount_msdosfs.8 b/sbin/mount_msdosfs/mount_msdosfs.8
index 3e4b08d..9f39ffb 100644
--- a/sbin/mount_msdosfs/mount_msdosfs.8
+++ b/sbin/mount_msdosfs/mount_msdosfs.8
@@ -142,15 +142,8 @@ If neither
 nor
 .Fl l
 are given,
-.Nm
-searches the root directory of the file system to
-be mounted for any existing Win'95 long filenames.
-If no such entries are found, but short DOS filenames are found,
-.Fl s
-is the default.
-Otherwise
 .Fl l
-is assumed.
+is the default.
 .It Fl 9
 Ignore the special Win'95 directory entries even
 if deleting or renaming a file.
diff --git a/sys/fs/msdosfs/msdosfs_vfsops.c b/sys/fs/msdosfs/msdosfs_vfsops.c
index 7c6d3ed..b3875e7 100644
--- a/sys/fs/msdosfs/msdosfs_vfsops.c
+++ b/sys/fs/msdosfs/msdosfs_vfsops.c
@@ -175,24 +175,8 @@ update_mp(struct mount *mp, struct thread *td)
 
 	if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
 		pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
-	else if (!(pmp->pm_flags &
-	    (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
-		struct vnode *rootvp;
-
-		/*
-		 * Try to divine whether to support Win'95 long filenames
-		 */
-		if (FAT32(pmp))
-			pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
-		else {
-			if ((error =
-			    msdosfs_root(mp, LK_EXCLUSIVE, &rootvp)) != 0)
-				return error;
-			pmp->pm_flags |= findwin95(VTODE(rootvp)) ?
-			    MSDOSFSMNT_LONGNAME : MSDOSFSMNT_SHORTNAME;
-			vput(rootvp);
-		}
-	}
+	else
+		pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
 	return 0;
 }