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([221.156.231.192]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-89a0724a045sm2987330b3a.45.2026.10.13.07.58.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Oct 2026 07:58:51 -0700 (PDT) From: DaeMyung Kang To: Namjae Jeon , Hyunchul Lee Cc: ntfs@lists.linux.dev, linux-kernel@vger.kernel.org, DaeMyung Kang Subject: [PATCH 0/2] ntfs: handle block device cache flush in fsync paths Date: Tue, 13 Oct 2026 23:58:44 +0900 Message-ID: <20261013145846.56415-1-charsyam@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Regular-file fsync currently ignores a block device cache flush failure, while directory fsync never issues a cache flush. Both can report success without ensuring that the data and metadata reached stable storage. The first patch returns and logs flush failures from regular-file fsync. The second adds a flush to directory fsync and reports its failure. The syncfs path already handles flush errors. QEMU blkdebug injected -EIO for flush_to_disk on ntfs-next at 04fb910da2c8. Before these changes, both file and directory fsync returned success while syncfs returned -EIO. With the respective fixes, both fsync calls return -EIO. A kretprobe confirmed the flush failures. DaeMyung Kang (2): ntfs: report block device flush failures from fsync ntfs: flush the block device when syncing a directory fs/ntfs/dir.c | 2 ++ fs/ntfs/file.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) base-commit: 04fb910da2c857cdf99a331c576c3e5e7197c6dd -- 2.43.0