diff --git a/fs/nfsd/flexfilelayout.c b/fs/nfsd/flexfilelayout.c
index 9f532418cac8..c6e6b9106a83 100644
--- a/fs/nfsd/flexfilelayout.c
+++ b/fs/nfsd/flexfilelayout.c
@@ -15,6 +15,7 @@
 
 #include "nfserr.h"
 #include "flexfilelayoutxdr.h"
+#include "auth.h"
 #include "pnfs.h"
 #include "vfs.h"
 
@@ -24,10 +25,10 @@ static __be32
 nfsd4_ff_proc_layoutget(struct svc_rqst *rqstp, struct inode *inode,
 		const struct svc_fh *fhp, struct nfsd4_layoutget *args)
 {
+	struct user_namespace *userns = nfsd_user_namespace(rqstp);
 	struct nfsd4_layout_seg *seg = &args->lg_seg;
 	u32 device_generation = 0;
 	int error;
-	uid_t u;
 
 	struct pnfs_ff_layout *fl;
 
@@ -50,13 +51,16 @@ nfsd4_ff_proc_layoutget(struct svc_rqst *rqstp, struct inode *inode,
 	fl->flags = FF_FLAGS_NO_LAYOUTCOMMIT | FF_FLAGS_NO_IO_THRU_MDS |
 		    FF_FLAGS_NO_READ_IO;
 
-	/* Do not allow a IOMODE_READ segment to have write pemissions */
-	if (seg->iomode == IOMODE_READ) {
-		u = from_kuid(&init_user_ns, inode->i_uid) + 1;
-		fl->uid = make_kuid(&init_user_ns, u);
-	} else
-		fl->uid = inode->i_uid;
-	fl->gid = inode->i_gid;
+	fl->uid = from_kuid_munged(userns, inode->i_uid);
+	fl->gid = from_kgid_munged(userns, inode->i_gid);
+
+	/*
+	 * Do not allow an IOMODE_READ segment to have write permissions.
+	 * The group is left intact so group-readable files stay readable;
+	 * nfsd_setuser() squashes an unmapped uid to the export's anon ID.
+	 */
+	if (seg->iomode == IOMODE_READ)
+		fl->uid++;
 
 	error = nfsd4_set_deviceid(&fl->deviceid, fhp, device_generation);
 	if (error)
diff --git a/fs/nfsd/flexfilelayoutxdr.c b/fs/nfsd/flexfilelayoutxdr.c
index 97d8a28dd3a0..c12bb7c371b0 100644
--- a/fs/nfsd/flexfilelayoutxdr.c
+++ b/fs/nfsd/flexfilelayoutxdr.c
@@ -33,8 +33,8 @@ nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
 
 	fh_len = 4 + xdr_align_size(fl->fh.size);
 
-	uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
-	gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
+	uid.len = sprintf(uid.buf, "%u", fl->uid);
+	gid.len = sprintf(gid.buf, "%u", fl->gid);
 
 	/* data server entry: deviceid + efficiency + stateid + fh list +
 	 * user + group + flags + stats_collect_hint
diff --git a/fs/nfsd/flexfilelayoutxdr.h b/fs/nfsd/flexfilelayoutxdr.h
index 6d5a1066a903..3e1876d49db2 100644
--- a/fs/nfsd/flexfilelayoutxdr.h
+++ b/fs/nfsd/flexfilelayoutxdr.h
@@ -35,8 +35,9 @@ struct pnfs_ff_device_addr {
 struct pnfs_ff_layout {
 	u32				flags;
 	u32				stats_collect_hint;
-	kuid_t				uid;
-	kgid_t				gid;
+	/* Values to encode; nfsd4_ff_proc_layoutget() has mapped these */
+	u32				uid;
+	u32				gid;
 	struct nfsd4_deviceid		deviceid;
 	stateid_t			stateid;
 	struct nfs_fh			fh;