[PATCH v2 19/19] NFSv4: Don't send delegation-related share access modes to CLOSE

trondmy
2024-06-17T01:25:17Z

From: Trond Myklebust <trond.myklebust@hammerspace.com>

When we set the new share access modes for CLOSE in nfs4_close_prepare().
we should only set a mode of NFS4_SHARE_ACCESS_READ, NFS4_SHARE_ACCESS_WRITE
or NFS4_SHARE_ACCESS_BOTH. Currently, we may also be passing in the NFSv4.1
share modes for controlling delegation requests in OPEN, which is wrong.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
fs/nfs/nfs4proc.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9376b5031acf..26758acba3a6 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1333,8 +1333,7 @@ static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
}

static u32
-nfs4_map_atomic_open_share(struct nfs_server *server,
- fmode_t fmode, int openflags)
+nfs4_fmode_to_share_access(fmode_t fmode)
{
u32 res = 0;

@@ -1348,6 +1347,15 @@ nfs4_map_atomic_open_share(struct nfs_server *server,
case FMODE_READ|FMODE_WRITE:
res = NFS4_SHARE_ACCESS_BOTH;
}
+ return res;
+}
+
+static u32
+nfs4_map_atomic_open_share(struct nfs_server *server,
+ fmode_t fmode, int openflags)
+{
+ u32 res = nfs4_fmode_to_share_access(fmode);
+
if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
goto out;
/* Want no delegation if we're using O_DIRECT */
@@ -3753,8 +3761,7 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
}

calldata->arg.share_access =
- nfs4_map_atomic_open_share(NFS_SERVER(inode),
- calldata->arg.fmode, 0);
+ nfs4_fmode_to_share_access(calldata->arg.fmode);

if (calldata->res.fattr == NULL)
calldata->arg.bitmask = NULL;
--
2.45.2