From owner-dev-commits-src-branches@freebsd.org Fri Jul 9 13:24:27 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 039A365F6B8; Fri, 9 Jul 2021 13:24:27 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GLv5Q6PfGz3JW7; Fri, 9 Jul 2021 13:24:26 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id C3227155D3; Fri, 9 Jul 2021 13:24:26 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 169DOQ8X063448; Fri, 9 Jul 2021 13:24:26 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 169DOQSw063447; Fri, 9 Jul 2021 13:24:26 GMT (envelope-from git) Date: Fri, 9 Jul 2021 13:24:26 GMT Message-Id: <202107091324.169DOQSw063447@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Kristof Provost Subject: git: 1882bdd192bc - stable/13 - pf: getstates: avoid taking the hashrow lock if the row is empty MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kp X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 1882bdd192bc406459dda00dda7246bb2f56b66c Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jul 2021 13:24:27 -0000 The branch stable/13 has been updated by kp: URL: https://cgit.FreeBSD.org/src/commit/?id=1882bdd192bc406459dda00dda7246bb2f56b66c commit 1882bdd192bc406459dda00dda7246bb2f56b66c Author: Kristof Provost AuthorDate: 2021-06-29 09:34:49 +0000 Commit: Kristof Provost CommitDate: 2021-07-09 08:08:32 +0000 pf: getstates: avoid taking the hashrow lock if the row is empty Reviewed by: mjg MFC after: 1 week Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D30946 (cherry picked from commit a19ff8ce9b58548a5f965db2c46eb03c38b15edb) --- sys/netpfil/pf/pf_ioctl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c index 0097d8b0f6b6..2e332156a488 100644 --- a/sys/netpfil/pf/pf_ioctl.c +++ b/sys/netpfil/pf/pf_ioctl.c @@ -5055,6 +5055,10 @@ pf_getstates(struct pfioc_nv *nv) for (int i = 0; i < pf_hashmask; i++) { struct pf_idhash *ih = &V_pf_idhash[i]; + /* Avoid taking the lock if there are no states in the row. */ + if (LIST_EMPTY(&ih->states)) + continue; + PF_HASHROW_LOCK(ih); LIST_FOREACH(s, &ih->states, entry) { if (s->timeout == PFTM_UNLINKED)