From nobody Mon Jan 20 16:36:53 2025 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4YcGFd4zn3z5kLHP; Mon, 20 Jan 2025 16:36:53 +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 "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4YcGFd4JZnz3V3C; Mon, 20 Jan 2025 16:36:53 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1737391013; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Z03LKoRcmGqXNgkSB3yPUwRnLk4aYnaGh0hunpew5A4=; b=FIPUJKyzEGg3FZg9frC6Ab1iHqQKTtfXyapv5ZzboQQdvc2pz8ESNuBBcix0qTh6Tj248s X//qcaxwkWsti6chrp0GDAsfAuGausEYCIiyZH5vtrZULFQiH+4erHhLEp0SYS+FtEerSv HvtoB9+H6AlUYR+2IrQlQBFe46LFeafHL1OHlvAsJKTl7MhHG8IMmm9s7Bp2PdEIUVDrIs MreG6ePvk53kr7hyeiMUkpb1Copg7AUjvwmSod2Pi57jNyMDx/K2cdXMRDKajUP3OUJbKv FHfDnfitehVoPwooEOhaz0+2ZyLeoMSd9AFF+BtKGnlQ9Ena2RP3P3xPSN0SYw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1737391013; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Z03LKoRcmGqXNgkSB3yPUwRnLk4aYnaGh0hunpew5A4=; b=CE2oFAlbvJ6VTikqnLgORM8pkbTJXQRYGEhEfj11z7Gy0CsgtoYmhsYyVHCSQUVrGIIcw2 bFV3VvcFEJR4aKl6tDLwnMYGbD0jJ/wGM0zxOCQha45ATmBXJaGXOyq90jUHkTBFGAngfL dOdV/POBqqKS/3GNMIuNK3FvjbPmGwbNYMkh+L7zBqycBkotLofDE2nW0/dPfsk2B8Qw8d CLODbiYS8OCs//VEzo1kgO1otF6FRqsr4wGETYeALzw1DT6rCSLXvzTUsmDRD2RJoN+59g aHCK245it4NLdmUsrakbDGU/H7+qBpghHWTMhiyd3lGZ4rU8KpEix/iIyluOZw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1737391013; a=rsa-sha256; cv=none; b=ZoezsYHdEKwG9evQGvVPtbSgwf3mQ65Q6EZAGqJ/jNwFFm9RF7FGJPHG2NRcJMu7n504jQ BWcYMv7vI+Kcf9mhYuhNb8pzycq1TBzadKzzmMTVRbVMIvOIef67NFeLlh86jHcQpTTjPX 4KDo4glR5UU4uXP3M7eDjY4vnzMf//i6jsjqhxE2uy5bC60v6arv9TH9z4JESG518hSAyR YZPnYDo1cjxpkNV1Ba+SbdFqcbiy1DAggcHcMxS6Ufthai77ZIJbn+Jlr+piXqxpKSu67j W0MgdWhPPM95H9X8pQFib9RGma3u32NpLrKgeCsmssDIHaG9bwlJg3/mcsMHzg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none 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 4YcGFd3s4qzC65; Mon, 20 Jan 2025 16:36:53 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.18.1/8.18.1) with ESMTP id 50KGarHw031328; Mon, 20 Jan 2025 16:36:53 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.18.1/8.18.1/Submit) id 50KGarMh031325; Mon, 20 Jan 2025 16:36:53 GMT (envelope-from git) Date: Mon, 20 Jan 2025 16:36:53 GMT Message-Id: <202501201636.50KGarMh031325@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Alan Somers Subject: git: 887494153482 - stable/14 - namei: add more detail about LOCKSHARED's behavior List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: asomers X-Git-Repository: src X-Git-Refname: refs/heads/stable/14 X-Git-Reftype: branch X-Git-Commit: 887494153482e4332f90a64a499ee1ed196ff25d Auto-Submitted: auto-generated The branch stable/14 has been updated by asomers: URL: https://cgit.FreeBSD.org/src/commit/?id=887494153482e4332f90a64a499ee1ed196ff25d commit 887494153482e4332f90a64a499ee1ed196ff25d Author: Alan Somers AuthorDate: 2024-12-17 20:10:57 +0000 Commit: Alan Somers CommitDate: 2025-01-20 16:36:24 +0000 namei: add more detail about LOCKSHARED's behavior [skip ci] Sponsored by: ConnectWise Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D48125 (cherry picked from commit 22bb70a6b3bb7799276ab480e40665b7d6e4ce25) --- share/man/man9/namei.9 | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/share/man/man9/namei.9 b/share/man/man9/namei.9 index 0be73f68cdda..63a6d3b11f6f 100644 --- a/share/man/man9/namei.9 +++ b/share/man/man9/namei.9 @@ -31,7 +31,7 @@ .\" If you integrate this manpage in another OS, I'd appreciate a note .\" - eivind@FreeBSD.org .\" -.Dd July 8, 2023 +.Dd December 17, 2024 .Dt NAMEI 9 .Os .Sh NAME @@ -124,7 +124,6 @@ Lock vnode on return with unless .Dv LOCKSHARED is also set. -The .Xr VOP_UNLOCK 9 should be used to release the lock (or @@ -153,8 +152,20 @@ and .Xr vrele 9 . .It Dv LOCKSHARED Lock vnode on return with -.Dv LK_SHARED . -The +.Dv LK_SHARED , +if permitted by the file system that owns the vnode. +The file system must explicitly permit this by setting +.Dv MNTK_LOOKUP_SHARED +in +.Dv mp->mnt_kern_flag +during mount and by calling +.Fn VN_LOCK_ASHARE +when allocating the vnode. +If +.Dv LOCKLEAF +is specified but shared locking is not permitted, then the vnode will be +returned with +.Dv LK_EXCLUSIVE . .Xr VOP_UNLOCK 9 should be used to release the lock (or