From owner-dev-commits-src-main@freebsd.org Thu Jan 7 23:30:22 2021 Return-Path: Delivered-To: dev-commits-src-main@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 8EB4E4DFDF2; Thu, 7 Jan 2021 23:30:22 +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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DBjC22Zdzz4YMf; Thu, 7 Jan 2021 23:30:22 +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 478F91936B; Thu, 7 Jan 2021 23:30:22 +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 107NUMQl075876; Thu, 7 Jan 2021 23:30:22 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 107NUMYH075875; Thu, 7 Jan 2021 23:30:22 GMT (envelope-from git) Date: Thu, 7 Jan 2021 23:30:22 GMT Message-Id: <202101072330.107NUMYH075875@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mateusz Guzik Subject: git: ac7715471ca4 - main - cache: stop checkpointing cn_nameptr MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: mjg X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: ac7715471ca438f128cec36ae440fea4d21b8ff4 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jan 2021 23:30:22 -0000 The branch main has been updated by mjg: URL: https://cgit.FreeBSD.org/src/commit/?id=ac7715471ca438f128cec36ae440fea4d21b8ff4 commit ac7715471ca438f128cec36ae440fea4d21b8ff4 Author: Mateusz Guzik AuthorDate: 2021-01-07 04:40:05 +0000 Commit: Mateusz Guzik CommitDate: 2021-01-07 23:29:38 +0000 cache: stop checkpointing cn_nameptr For aborts cn_nameptr is the same as cn_pnbuf. For partial results the same cn_nameptr is to be used. --- sys/kern/vfs_cache.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/sys/kern/vfs_cache.c b/sys/kern/vfs_cache.c index b6f97e55746b..7d774466be53 100644 --- a/sys/kern/vfs_cache.c +++ b/sys/kern/vfs_cache.c @@ -3615,8 +3615,8 @@ SYSCTL_PROC(_vfs, OID_AUTO, cache_fast_lookup, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_MP * need restoring in case fast path lookup fails. */ struct nameidata_saved { - char *cn_nameptr; #ifdef INVARIANTS + char *cn_nameptr; size_t ni_pathlen; #endif int cn_flags; @@ -3696,8 +3696,8 @@ cache_fpl_checkpoint(struct cache_fpl *fpl, struct nameidata_saved *snd) { snd->cn_flags = fpl->ndp->ni_cnd.cn_flags; - snd->cn_nameptr = fpl->ndp->ni_cnd.cn_nameptr; #ifdef INVARIANTS + snd->cn_nameptr = fpl->ndp->ni_cnd.cn_nameptr; snd->ni_pathlen = fpl->debug.ni_pathlen; #endif } @@ -3707,7 +3707,6 @@ cache_fpl_restore_partial(struct cache_fpl *fpl, struct nameidata_saved *snd) { fpl->ndp->ni_cnd.cn_flags = snd->cn_flags; - fpl->ndp->ni_cnd.cn_nameptr = snd->cn_nameptr; #ifdef INVARIANTS fpl->debug.ni_pathlen = snd->ni_pathlen; #endif @@ -3722,6 +3721,7 @@ cache_fpl_restore_abort(struct cache_fpl *fpl, struct nameidata_saved *snd) * It is 0 on entry by API contract. */ fpl->ndp->ni_resflags = 0; + fpl->ndp->ni_cnd.cn_nameptr = fpl->ndp->ni_cnd.cn_pnbuf; } #ifdef INVARIANTS @@ -4018,6 +4018,12 @@ cache_fplookup_partial_setup(struct cache_fpl *fpl) } cache_fpl_restore_partial(fpl, &fpl->snd); +#ifdef INVARIANTS + if (cnp->cn_nameptr != fpl->snd.cn_nameptr) { + panic("%s: cn_nameptr mismatch (%p != %p) full [%s]\n", __func__, + cnp->cn_nameptr, fpl->snd.cn_nameptr, cnp->cn_pnbuf); + } +#endif ndp->ni_startdir = dvp; cnp->cn_flags |= MAKEENTRY;