linux-kernel - [PATCH AUTOSEL for 4.14 61/67] nfsd4: permit layoutget of executable-only files

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Date:   Thu, 8 Mar 2018 04:57:59 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Benjamin Coddington <bcodding@...hat.com>,
        "J . Bruce Fields" <bfields@...hat.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.14 61/67] nfsd4: permit layoutget of
 executable-only files

From: Benjamin Coddington <bcodding@...hat.com>

[ Upstream commit 66282ec1cf004c09083c29cb5e49019037937bbd ]

Clients must be able to read a file in order to execute it, and for pNFS
that means the client needs to be able to perform a LAYOUTGET on the file.

This behavior for executable-only files was added for OPEN in commit
a043226bc140 "nfsd4: permit read opens of executable-only files".

This fixes up xfstests generic/126 on block/scsi layouts.

Signed-off-by: Benjamin Coddington <bcodding@...hat.com>
Signed-off-by: J. Bruce Fields <bfields@...hat.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 fs/nfsd/nfs4proc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 8487486ec496..8ce60986fb75 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1372,14 +1372,14 @@ nfsd4_layoutget(struct svc_rqst *rqstp,
 	const struct nfsd4_layout_ops *ops;
 	struct nfs4_layout_stateid *ls;
 	__be32 nfserr;
-	int accmode;
+	int accmode = NFSD_MAY_READ_IF_EXEC;
 
 	switch (lgp->lg_seg.iomode) {
 	case IOMODE_READ:
-		accmode = NFSD_MAY_READ;
+		accmode |= NFSD_MAY_READ;
 		break;
 	case IOMODE_RW:
-		accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
+		accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
 		break;
 	default:
 		dprintk("%s: invalid iomode %d\n",
-- 
2.14.1