From: Wang Di <di.wang@intel.com>
Date: Fri, 14 Nov 2014 07:16:09 +0000 (-0800)
Subject: LU-5894 mds: allow 2.4/2.5 clients create remote dir
X-Git-Tag: 2.6.91~25
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=1a165c02f5e97c830800d6dcbc11e86790fc015d;p=fs%2Flustre-release.git

LU-5894 mds: allow 2.4/2.5 clients create remote dir

MDS will only return ENOTSUPP if old client (2.4/2.5) tries
to create striped dir with stripe count > 1, so it can still
create remote directory on the new MDS (>= 2.6).

Change-Id: I25c90ae793f91eed032949d26fd5e7fc41801e4f
Signed-off-by: Wang Di <di.wang@intel.com>
Reviewed-on: http://review.whamcloud.com/12715
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
---

diff --git a/lustre/mdt/mdt_reint.c b/lustre/mdt/mdt_reint.c
index f751f98..d602111 100644
--- a/lustre/mdt/mdt_reint.c
+++ b/lustre/mdt/mdt_reint.c
@@ -313,8 +313,13 @@ static int mdt_remote_permission(struct mdt_thread_info *info,
 		return -ENOTSUPP;
 
 	if (S_ISDIR(attr->la_mode) && spec->u.sp_ea.eadata != NULL &&
-	    spec->u.sp_ea.eadatalen != 0 && !mdt_is_striped_client(exp))
-		return -ENOTSUPP;
+	    spec->u.sp_ea.eadatalen != 0) {
+		const struct lmv_user_md *lum = spec->u.sp_ea.eadata;
+
+		if (le32_to_cpu(lum->lum_stripe_count) > 1 &&
+		    !mdt_is_striped_client(exp))
+			return -ENOTSUPP;
+	}
 
 	return 0;
 }