From owner-svn-src-head@freebsd.org Mon Apr 30 23:53:28 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2D107FB9989; Mon, 30 Apr 2018 23:53:28 +0000 (UTC) (envelope-from gallatin@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D59A06A962; Mon, 30 Apr 2018 23:53:27 +0000 (UTC) (envelope-from gallatin@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id D07D81A35C; Mon, 30 Apr 2018 23:53:27 +0000 (UTC) (envelope-from gallatin@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w3UNrRmU015490; Mon, 30 Apr 2018 23:53:27 GMT (envelope-from gallatin@FreeBSD.org) Received: (from gallatin@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w3UNrREN015489; Mon, 30 Apr 2018 23:53:27 GMT (envelope-from gallatin@FreeBSD.org) Message-Id: <201804302353.w3UNrREN015489@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: gallatin set sender to gallatin@FreeBSD.org using -f From: Andrew Gallatin Date: Mon, 30 Apr 2018 23:53:27 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r333131 - head/sys/net X-SVN-Group: head X-SVN-Commit-Author: gallatin X-SVN-Commit-Paths: head/sys/net X-SVN-Commit-Revision: 333131 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Apr 2018 23:53:28 -0000 Author: gallatin Date: Mon Apr 30 23:53:27 2018 New Revision: 333131 URL: https://svnweb.freebsd.org/changeset/base/333131 Log: Fix iflib_encap() EFBIG handling bugs 1) Don't give up if m_collapse() fails. Rather than giving up, try m_defrag() immediately. 2) Fix a leak where, if the NIC driver rejected the defrag'ed chain as having too many segments, we would fail to free the chain. Reviewed by: Matthew Macy (this version of patch) Submitted by: Matthew Macy (early version of leak fix) Modified: head/sys/net/iflib.c Modified: head/sys/net/iflib.c ============================================================================== --- head/sys/net/iflib.c Mon Apr 30 23:05:57 2018 (r333130) +++ head/sys/net/iflib.c Mon Apr 30 23:53:27 2018 (r333131) @@ -3244,8 +3244,12 @@ defrag: switch (err) { case EFBIG: /* try collapse once and defrag once */ - if (remap == 0) + if (remap == 0) { m_head = m_collapse(*m_headp, M_NOWAIT, max_segs); + /* try defrag if collapsing fails */ + if (m_head == NULL) + remap++; + } if (remap == 1) m_head = m_defrag(*m_headp, M_NOWAIT); remap++; @@ -3333,13 +3337,18 @@ defrag: */ txq->ift_pidx = pi.ipi_new_pidx; txq->ift_npending += pi.ipi_ndescs; - } else if (__predict_false(err == EFBIG && remap < 2)) { + } else { *m_headp = m_head = iflib_remove_mbuf(txq); - remap = 1; - txq->ift_txd_encap_efbig++; - goto defrag; - } else + if (err == EFBIG) { + txq->ift_txd_encap_efbig++; + if (remap < 2) { + remap = 1; + goto defrag; + } + } DBG_COUNTER_INC(encap_txd_encap_fail); + goto defrag_failed; + } return (err); defrag_failed: