From 9f7b066bd901128f0a5e481e3c23ae9857b1263e Mon Sep 17 00:00:00 2001
From: LOLi <loli10K@users.noreply.github.com>
Date: Mon, 5 Jun 2017 20:26:25 +0200
Subject: [PATCH] Linux 4.9 compat: fix zfs_ctldir xattr handling

Since torvalds/linux@d0a5b99 IOP_XATTR is used to indicate the inode
has xattr support: clear it for the ctldir inodes to avoid EIO errors.

Reviewed-by: Chunwei Chen <david.chen@osnexus.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #6189
---
 module/zfs/zfs_ctldir.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/module/zfs/zfs_ctldir.c b/module/zfs/zfs_ctldir.c
index 0c90532c10..3b5fb196f1 100644
--- a/module/zfs/zfs_ctldir.c
+++ b/module/zfs/zfs_ctldir.c
@@ -492,6 +492,9 @@ zfsctl_inode_alloc(zfsvfs_t *zfsvfs, uint64_t id,
 	ip->i_ctime = now;
 	ip->i_fop = fops;
 	ip->i_op = ops;
+#if defined(IOP_XATTR)
+	ip->i_opflags &= ~IOP_XATTR;
+#endif
 
 	if (insert_inode_locked(ip)) {
 		unlock_new_inode(ip);