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Thu, 25 Jun 2026 01:37:35 -0700 (PDT) Received: from localhost ([212.73.77.104]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-46c9ed7491esm9943798f8f.37.2026.06.25.01.37.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 25 Jun 2026 01:37:35 -0700 (PDT) From: Askar Safin To: linux-fsdevel@vger.kernel.org, Christian Brauner , Alexander Viro , Jan Kara Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, netdev@vger.kernel.org, fuse-devel@lists.linux.dev, Linus Torvalds , Matthew Wilcox , Jens Axboe , Christoph Hellwig , David Howells , Andrew Morton , David Hildenbrand , Pedro Falcato , Miklos Szeredi , Andy Lutomirski , Collin Funk , David Laight , Stefan Metzmacher , The 8472 , Willy Tarreau , Joanne Koong , Val Packett , Andrei Vagin , patches@lists.linux.dev Subject: [PATCH v2 7/7] pipe: set FMODE_NOWAIT for named FIFOs Date: Thu, 25 Jun 2026 08:34:09 +0000 Message-ID: <20260625083409.3769242-8-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260625083409.3769242-1-safinaskar@gmail.com> References: <20260625083409.3769242-1-safinaskar@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit CRIU relies on ability to do vmsplice(SPLICE_F_NONBLOCK) on named FIFOs. Signed-off-by: Askar Safin --- fs/pipe.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/pipe.c b/fs/pipe.c index c0ccf21b9..a8e9b4459 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1156,6 +1156,12 @@ static int fifo_open(struct inode *inode, struct file *filp) /* We can only do regular read/write on fifos */ stream_open(inode, filp); + /* + * CRIU relies on ability to do vmsplice(SPLICE_F_NONBLOCK) + * on named FIFOs. + */ + filp->f_mode |= FMODE_NOWAIT; + switch (filp->f_mode & (FMODE_READ | FMODE_WRITE)) { case FMODE_READ: /* -- 2.47.3