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

From: Sasha Levin
Date: Thu Mar 08 2018 - 01:36:30 EST


From: Benjamin Coddington <bcodding@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
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