From owner-freebsd-bugs@freebsd.org Thu Feb 6 23:28:27 2020 Return-Path: Delivered-To: freebsd-bugs@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 5614623DBE4 for ; Thu, 6 Feb 2020 23:28:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 48DF3v1fqPz3M9Z for ; Thu, 6 Feb 2020 23:28:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 355C523DBE0; Thu, 6 Feb 2020 23:28:27 +0000 (UTC) Delivered-To: bugs@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 3521D23DBDF for ; Thu, 6 Feb 2020 23:28:27 +0000 (UTC) (envelope-from bugzilla-noreply@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) server-signature RSA-PSS (4096 bits) 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 48DF3v0FGPz3M9X for ; Thu, 6 Feb 2020 23:28:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id EB53523678 for ; Thu, 6 Feb 2020 23:28:26 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 016NSQE8072026 for ; Thu, 6 Feb 2020 23:28:26 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 016NSQIm072025 for bugs@FreeBSD.org; Thu, 6 Feb 2020 23:28:26 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 243925] [FUSEFS] Read operation on a write only file Date: Thu, 06 Feb 2020 23:28:26 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: cem@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: fs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: assigned_to cc version Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 Feb 2020 23:28:27 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243925 Conrad Meyer changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|bugs@FreeBSD.org |fs@FreeBSD.org CC| |asomers@FreeBSD.org Version|12.1-RELEASE |CURRENT --- Comment #1 from Conrad Meyer --- Can you share a specific ordering of IPCs, including exact open flags used = and FUSE procedures seen on the server side? For cached IO (bio) without O_DIRECT, we probably attempt to read the last page/sector of a file we are appending to. Any local filesystem would do something similar (read a block from the backing volume when a write-only append handle is open for an uncached, cacheable file), if the file is not a perfect multiple of the page size. I think we mostly try to open separate read handles for this, but it's we missed a case. Any specific details you can share would be helpful. Thank= s. --=20 You are receiving this mail because: You are the assignee for the bug.=