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Wong" , Christoph Hellwig , John Garry , Ojaswin Mujoo , Dave Chinner , linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Ritesh Harjani (IBM)" Subject: [PATCH 5/6] iomap: Lift blocksize restriction on atomic writes Date: Fri, 25 Oct 2024 09:15:54 +0530 Message-ID: X-Mailer: git-send-email 2.46.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Filesystems like ext4 can submit writes in multiples of blocksizes. But we still can't allow the writes to be split. Hence let's check if the iomap_length() is same as iter->len or not. This shouldn't affect XFS since it anyways checks for this in xfs_file_write_iter() to not support atomic write size request of more than FS blocksize. Signed-off-by: Ritesh Harjani (IBM) --- fs/iomap/direct-io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index ed4764e3b8f0..1d33b4239b3e 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -306,7 +306,7 @@ static loff_t iomap_dio_bio_iter(const struct iomap_ite= r *iter, size_t copied =3D 0; size_t orig_count; =20 - if (atomic && length !=3D fs_block_size) + if (atomic && length !=3D iter->len) return -EINVAL; =20 if ((pos | length) & (bdev_logical_block_size(iomap->bdev) - 1) || --=20 2.46.0