From patchwork Mon Nov 18 23:02:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 13879148 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CA471E6DC2; Mon, 18 Nov 2024 23:02:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731970962; cv=none; b=nwymCCKU0i9VJ0Dnc6kGbrs/RJl10BZZydAZ1DZsEqMKlyYRwfiUv5ZlqMKu/TF1bLwoPATo3yicHzpqAuA4biWbJ/IZjxBcIXeHKC9dCGgz0PcLLmf3zsPSHXTM8zTIBVhfvz/2rJQngAWnYgcFG12J8Y/Mw4e6L2AiNYXa2As= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731970962; c=relaxed/simple; bh=+MawB7cwzzMb3BL0woY87nFbUmAX4umDudmAGod8v2k=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=XNu6T8W2haWocAJCNpeVOsEAoVi98Wxsgxtptn0ebdB8PZU1DXgI8ZW1mobS/MEUfkulUBP+3QBXjiHxMT+6JS4EI5q5Gs/29uvGvF5Ut+4lj4NIHEQcYS7NXB7hRj4pnC+XA8pmSCNMard2QEUk5Y5qjeWtT2+KcMbS7rursNM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ugQuk9Lk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ugQuk9Lk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE8A5C4CECC; Mon, 18 Nov 2024 23:02:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731970961; bh=+MawB7cwzzMb3BL0woY87nFbUmAX4umDudmAGod8v2k=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=ugQuk9LkpX83Ltrbu7ZpNdqpJgQ7SgbVTr1IV/Fx9neJ/+cheG1N7HNlrOFP6Yzq2 6b1YIhK/u16SpDQgTSUYgY1L20jwlwXqnSptJjaAGNSaK1EdZUqGT1aLQECP2IvNZ3 5GU+LMRNu48tOglcD+oM7ZOiXrBEIHulwxmQ8WOO9fx+HUe9sSMjqW1tgy102FP8+4 YrIZ1hVOTIQe4ulrwJjI7XnAFR2XExAPawiYKaYCC9lzr+VZl4SscdOdO8y5PxpRqO 5Ui5CmXGMc2rAiYEsxPcQ/BSAlrsCETCWICvRKeAE6APjkZexKlHmHoZWyhSrUPJ6k +OCIau6aBbMxw== Date: Mon, 18 Nov 2024 15:02:41 -0800 Subject: [PATCH 05/12] generic/562: handle ENOSPC while cloning gracefully From: "Darrick J. Wong" To: zlang@redhat.com, djwong@kernel.org Cc: linux-xfs@vger.kernel.org, fstests@vger.kernel.org Message-ID: <173197064501.904310.1505759730439532159.stgit@frogsfrogsfrogs> In-Reply-To: <173197064408.904310.6784273927814845381.stgit@frogsfrogsfrogs> References: <173197064408.904310.6784273927814845381.stgit@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong This test creates a couple of patterned files on a tiny filesystem, fragments the free space, clones one patterned file to the other, and checks that the entire file was cloned. However, this test doesn't work on a 64k fsblock filesystem because we've used up all the free space reservation for the rmapbt, and that causes the FICLONE to error out with ENOSPC partway through. Hence we need to detect the ENOSPC and _notrun the test. That said, it turns out that XFS has been silently dropping error codes if we managed to make some progress cloning extents. That's ok if the operation has REMAP_FILE_CAN_SHORTEN like copy_file_range does, but FICLONE/FICLONERANGE do not permit partial results, so the dropped error codes is actually an error. Therefore, this testcase now becomes a regression test for the patch to fix that. Signed-off-by: Darrick J. Wong --- tests/generic/562 | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tests/generic/562 b/tests/generic/562 index 91360c4154a6a2..62899945003513 100755 --- a/tests/generic/562 +++ b/tests/generic/562 @@ -15,6 +15,9 @@ _begin_fstest auto clone punch . ./common/filter . ./common/reflink +test "$FSTYP" = "xfs" && \ + _fixed_by_kernel_commit XXXXXXXXXX "xfs: don't drop errno values when we fail to ficlone the entire range" + _require_scratch_reflink _require_test_program "punch-alternating" _require_xfs_io_command "fpunch" @@ -48,8 +51,11 @@ while true; do done # Now clone file bar into file foo. This is supposed to succeed and not fail -# with ENOSPC for example. -_reflink $SCRATCH_MNT/bar $SCRATCH_MNT/foo >>$seqres.full +# with ENOSPC for example. However, XFS will sometimes run out of space. +_reflink $SCRATCH_MNT/bar $SCRATCH_MNT/foo >>$seqres.full 2> $tmp.err +cat $tmp.err +grep -q 'No space left on device' $tmp.err && \ + _notrun "ran out of space while cloning" # Unmount and mount the filesystem again to verify the operation was durably # persisted.