[PATCH] knfsd: call lockd_down when closing a socket via a write to nfsd/portlist

The refcount that nfsd holds on lockd is based on the number of open sockets.
So when we close a socket, we should decrement the ref (with lockd_down).

Currently when a socket is closed via writing to the portlist file, that
doesn't happen.

So: make sure we get an error return if the socket that was requested does is
not found, and call lockd_down if it was.

Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c6a477..8399728 100644 (file)
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -545,6 +545,8 @@ static ssize_t write_ports(struct file *file, char *buf, size_t size)
                if (nfsd_serv)
                        len = svc_sock_names(buf, nfsd_serv, toclose);
                unlock_kernel();
                if (nfsd_serv)
                        len = svc_sock_names(buf, nfsd_serv, toclose);
                unlock_kernel();

+               if (len >= 0)
+                       lockd_down();

                kfree(toclose);
                return len;
        }
                kfree(toclose);
                return len;
        }

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index cba85d1..4e0813b 100644 (file)
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -493,6 +493,8 @@ svc_sock_names(char *buf, struct svc_serv *serv, char *toclose)
        spin_unlock(&serv->sv_lock);
        if (closesk)
                svc_delete_socket(closesk);
        spin_unlock(&serv->sv_lock);
        if (closesk)
                svc_delete_socket(closesk);

+       else if (toclose)
+               return -ENOENT;

        return len;
 }
 EXPORT_SYMBOL(svc_sock_names);
        return len;
 }
 EXPORT_SYMBOL(svc_sock_names);