[PATCH] ceph: set pool_ns in new inode layout for async creates

[Jeff Layton <jlayton@kernel.org>]

Dan reported that he was unable to write to files that had been
asynchronously created when the client's OSD caps are restricted to a
particular namespace.

The issue is that the layout for the new inode is only partially being
filled. Ensure that we populate the pool_ns_data and pool_ns_len in the
iinfo before calling ceph_fill_inode.

Reported-by: Dan van der Ster <dan@vanderster.com>
Fixes: 9a8d03ca2e2c ("ceph: attempt to do async create when possible")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/file.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index cbe4d5a5cde5..efea321ff643 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -599,6 +599,7 @@ static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
 	struct ceph_inode_info *ci = ceph_inode(dir);
 	struct inode *inode;
 	struct timespec64 now;
+	struct ceph_string *pool_ns;
 	struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb);
 	struct ceph_vino vino = { .ino = req->r_deleg_ino,
 				  .snap = CEPH_NOSNAP };
@@ -648,11 +649,17 @@ static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
 	in.max_size = cpu_to_le64(lo->stripe_unit);
 
 	ceph_file_layout_to_legacy(lo, &in.layout);
+	pool_ns = ceph_try_get_string(lo->pool_ns);
+	if (pool_ns) {
+		iinfo.pool_ns_len = pool_ns->len;
+		iinfo.pool_ns_data = pool_ns->str;
+	}
 
 	down_read(&mdsc->snap_rwsem);
 	ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
 			      req->r_fmode, NULL);
 	up_read(&mdsc->snap_rwsem);
+	ceph_put_string(pool_ns);
 	if (ret) {
 		dout("%s failed to fill inode: %d\n", __func__, ret);
 		ceph_dir_clear_complete(dir);
-- 
2.34.1