Commit 0cd14a06 authored Jul 19, 2010 by Jeff Layton Committed by J. Bruce Fields Jul 23, 2010

nfsd: fix error handling in __write_ports_addxprt



__write_ports_addxprt calls nfsd_create_serv. That increases the
refcount of nfsd_serv (which is tracked in sv_nrthreads). The service
only decrements the thread count on error, not on success like
__write_ports_addfd does, so using this interface leaves the nfsd
thread count high.

Fix this by having this function call svc_destroy() on error to release
the reference (and possibly to tear down the service) and simply
decrement the refcount without tearing down the service on success.

This makes the sv_threads handling work basically the same in both
__write_ports_addxprt and __write_ports_addfd.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

parent 78a8d7c8

fs/nfsd/nfsctl.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -1018,6 +1018,9 @@ static ssize_t __write_ports_addxprt(char *buf)
		PF_INET6, port, SVC_SOCK_ANONYMOUS);
		if (err < 0 && err != -EAFNOSUPPORT)
		goto out_close;

		/* Decrease the count, but don't shut down the service */
		nfsd_serv->sv_nrthreads--;
		return 0;
		out_close:
		xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
		@@ -1026,8 +1029,7 @@ static ssize_t __write_ports_addxprt(char *buf)
		svc_xprt_put(xprt);
		}
		out_err:
		/* Decrease the count, but don't shut down the service */
		nfsd_serv->sv_nrthreads--;
		svc_destroy(nfsd_serv);
		return err;
		}