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Sat, 7 Nov 2026 11:44:28 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-ThreadId: A37rHgw9iumg Date: Sat, 07 Nov 2026 11:44:07 -0500 From: "Chuck Lever" To: "Christian Brauner" , linux-fsdevel@vger.kernel.org Cc: "Linus Torvalds" , "Jann Horn" , "Josef Bacik" , "Chris Mason" , "Jeff Layton" , NeilBrown , "Eric Dumazet" , "Thomas Gleixner" , "Alexander Viro" , "Jonathan Corbet" , "Christoph Hellwig" , "Greg Kroah-Hartman" , "Joel Granados" , "Kees Cook" , "Jan Kara" , "Jan Kara" , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, "linux-scsi@vger.kernel.org" , linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, "Linuxppc Dev" , netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, "Takashi Iwai" , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org Message-Id: In-Reply-To: <20261104-work-procfs-net-v2-8-221e2437fed1@kernel.org> References: <20261104-work-procfs-net-v2-0-221e2437fed1@kernel.org> <20261104-work-procfs-net-v2-8-221e2437fed1@kernel.org> Subject: Re: [PATCH RESEND v2 08/13] SUNRPC: let procfs copy out reads Content-Type: text/plain Content-Transfer-Encoding: 7bit On Wed, Nov 4, 2026, at 2:59 PM, Christian Brauner wrote: > Implement ->proc_read_buf() for the procfs channel, flush, > use-gss-proxy and gss_krb5_enctypes files so procfs copies what is read > to userspace after it unpinned the entry. > > cache_read() takes an iov_iter now. The rpc_pipefs channel file passes > one for the user buffer and behaves like before. The procfs one passes > one for procfs' buffer, and a read still hands out at most one request. > A reader of the procfs channel file whose copy out fails, a readv() > with a bad later segment included, loses what was handed out, since the > request moves on before procfs copies it out. If that was only part of > a request the next read returns the rest of it. Both flush files share > flush_time_text(). > > The procfs files are removed when the network namespace goes away and > that no longer waits for a reader that faults on its buffer. > > Signed-off-by: Christian Brauner (Amutable) Acked-by: Chuck Lever -- Chuck Lever (Come to NFS bake-a-thon! https://nfsv4bat.org)