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Wed, 18 Feb 2026 05:27:16 -0800 (PST) X-Received: by 2002:a05:600c:3f1b:b0:480:68ed:1e70 with SMTP id 5b1f17b1804b1-48371096d3amr298391535e9.35.1771421235710; Wed, 18 Feb 2026 05:27:15 -0800 (PST) From: Hanna Czenczek To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Hanna Czenczek , Kevin Wolf , Brian Song Subject: [PATCH v4 13/24] iotests/308: Use conv=notrunc to test growability Date: Wed, 18 Feb 2026 14:26:22 +0100 Message-ID: <20260218132633.29748-14-hreitz@redhat.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260218132633.29748-1-hreitz@redhat.com> References: <20260218132633.29748-1-hreitz@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=hreitz@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.043, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1771421676651158500 Content-Type: text/plain; charset="utf-8" Without conv=3Dnotrunc, dd will automatically truncate the output file to the @seek value at least. We want to test post-EOF I/O, not truncate, so pass conv=3Dnotrunc. (It does not make a difference in practice because we only seek to the EOF, so the truncate effectively does nothing, but this is still cleaner.) Signed-off-by: Hanna Czenczek --- tests/qemu-iotests/308 | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/308 b/tests/qemu-iotests/308 index 033d5cbe22..6ecb275555 100755 --- a/tests/qemu-iotests/308 +++ b/tests/qemu-iotests/308 @@ -296,7 +296,8 @@ orig_disk_usage=3D$(disk_usage "$TEST_IMG") # Should fail (exports are non-growable by default) # (Note that qemu-io can never write beyond the EOF, so we have to use # dd here) -dd if=3D/dev/zero of=3D"$EXT_MP" bs=3D1 count=3D64k seek=3D$orig_len 2>&1 \ +dd if=3D/dev/zero of=3D"$EXT_MP" bs=3D1 count=3D64k seek=3D$orig_len \ + conv=3Dnotrunc 2>&1 \ | _filter_testdir | _filter_imgfmt =20 echo @@ -333,7 +334,7 @@ fuse_export_add \ 'node-protocol' =20 # Now we should be able to write beyond the EOF -dd if=3D/dev/zero of=3D"$EXT_MP" bs=3D1 count=3D64k seek=3D$new_len 2>&1 \ +dd if=3D/dev/zero of=3D"$EXT_MP" bs=3D1 count=3D64k seek=3D$new_len conv= =3Dnotrunc 2>&1 \ | _filter_testdir | _filter_imgfmt =20 new_len=3D$(get_proto_len "$EXT_MP" "$TEST_IMG") --=20 2.53.0