Subject: [PATCH 01/20] NFSD: handle errors better in write_ports_addfd()
From:   NeilBrown <neilb@suse.de>
To:     "J. Bruce Fields" <bfields@fieldses.org>,
        Chuck Lever <chuck.lever@oracle.com>
Cc:     linux-nfs@vger.kernel.org
Date:   Mon, 29 Nov 2021 15:51:25 +1100
Message-ID: <163816148551.32298.1997321981162233125.stgit@noble.brown>
In-Reply-To: <163816133466.32298.13831616524908720974.stgit@noble.brown>
References: <163816133466.32298.13831616524908720974.stgit@noble.brown>
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If write_ports_add() fails, we shouldn't destroy the serv, unless we had
only just created it.  So if there are any permanent sockets already
attached, leave the serv in place.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 fs/nfsd/nfsctl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index af8531c3854a..d47956672f9e 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -742,7 +742,7 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred
 		return err;
 
 	err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);
-	if (err < 0) {
+	if (err < 0 && list_empty(&nn->nfsd_serv->sv_permsocks)) {
 		nfsd_destroy(net);
 		return err;
 	}