From 721ccfb79b6f74f4052de70236d24047e73682d4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 29 Apr 2013 11:11:58 -0400 Subject: [PATCH] NFSv4: Warn once about servers that incorrectly apply open mode to setattr Debugging aid to help identify servers that incorrectly apply open mode checks to setattr requests that are not changing the file size. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4proc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 982b4527..9da4bd5 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2184,6 +2184,13 @@ static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, err = _nfs4_do_setattr(inode, cred, fattr, sattr, state); switch (err) { case -NFS4ERR_OPENMODE: + if (!(sattr->ia_valid & ATTR_SIZE)) { + pr_warn_once("NFSv4: server %s is incorrectly " + "applying open mode checks to " + "a SETATTR that is not " + "changing file size.\n", + server->nfs_client->cl_hostname); + } if (state && !(state->state & FMODE_WRITE)) { err = -EBADF; if (sattr->ia_valid & ATTR_OPEN) -- 2.7.4