From patchwork Tue Nov 19 12:16:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13879827 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 868E31CCB38; Tue, 19 Nov 2024 12:16:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732018611; cv=none; b=j0Y+q6Hq65OkJMmlY60x+tpHjpWYb4GH7cNc7TehUPUi4RkBcpv50iHdb+6aE14tutt4MLVGkoCmT/c5oOLd5jRCbHeclRqmjSmMxd+rhWvGL02PvQHDlgOU9u2AIem+z2KLEvkrUd5r0J+tv7fW6lRyRtZcXSmbKlkuVHAWLMg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732018611; c=relaxed/simple; bh=6pxM1bOMRFet6+JOFGsE6KmOLaBM0tWwnKAnjSKCxH4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D/hr21eQuXeHlyB5NtLOhDjUgpfPbYwR/1XUmFYs76hau89p8qg5gbCLmmfky8MSNpNy0GuSJxPwhOqCunNXgfu3mk6GssZwZ4lrRniKRC/WXqEcKyY+/ODkbk1Mjm0iqqXQ+MAzWh8/+5YK454QJOzGyhM3T/TpEvJMO1Brt8A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=BsPDud3O; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="BsPDud3O" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=akv2+qO8RNiZ/MdlD08p6GimzeODp1R3NwsVs3l8fTM=; b=BsPDud3O0GUVpn/5hbXXtIzOcV VFQ0MdlEnxqRcxaA1TvSmWYDn2B90ptdB0B48mB9R0rJlg9AY8RKqWE49xUJu2g6k1+xSPc4Tz812 4VYhHufa9c8uW6bjfRLj7SOY2IEP16+r2IorJ+CWh5V/WnF481bMgeRQ+By+DyZmsqbfXVdc3XQ42 aWFEuPQrfBokLajvky9HFN/wSMrpE+ZrYXrRD3r1LXcWFVBubFtDrNSSjpw2J0RmWVQcoT1nLveQ9 0l+zI5gbg6WilgIzD61DQxs+Y7f+ZGB2H0VBE2iC9xJrla3Wh9DIqdToHT9f3Ucuf1Azn00fVRbcr Pg5iKbmQ==; Received: from 2a02-8389-2341-5b80-1731-a089-d2b1-3edf.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:1731:a089:d2b1:3edf] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1tDN9y-0000000CItq-1hWL; Tue, 19 Nov 2024 12:16:46 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Christian Brauner , Keith Busch , Sagi Grimberg , Kanchan Joshi , Hui Qi , Nitesh Shetty , Jan Kara , Pavel Begunkov , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org Subject: [PATCH 03/15] io_uring: enable passing a per-io write stream Date: Tue, 19 Nov 2024 13:16:17 +0100 Message-ID: <20241119121632.1225556-4-hch@lst.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241119121632.1225556-1-hch@lst.de> References: <20241119121632.1225556-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html From: Kanchan Joshi Allow userspace to pass a per-I/O write stream in the SQE: __u16 write_stream; Application can query the supported values from the statx max_write_streams field. Unsupported values are ignored by file operations that do not support write streams or rejected with an error by those that support them. Signed-off-by: Kanchan Joshi Signed-off-by: Nitesh Shetty Signed-off-by: Keith Busch [hch: s/write_hints/write_streams/g] Signed-off-by: Christoph Hellwig --- include/uapi/linux/io_uring.h | 4 ++++ io_uring/io_uring.c | 2 ++ io_uring/rw.c | 2 +- 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index aac9a4f8fa9a..7a6a1b3726d3 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -98,6 +98,10 @@ struct io_uring_sqe { __u64 addr3; __u64 __pad2[1]; }; + struct { + __u64 __pad4[1]; + __u16 write_stream; + }; __u64 optval; /* * If the ring is initialized with IORING_SETUP_SQE128, then diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index da8fd460977b..a54da2dd83a1 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -3868,6 +3868,8 @@ static int __init io_uring_init(void) BUILD_BUG_SQE_ELEM(46, __u16, __pad3[0]); BUILD_BUG_SQE_ELEM(48, __u64, addr3); BUILD_BUG_SQE_ELEM_SIZE(48, 0, cmd); + BUILD_BUG_SQE_ELEM(48, __u64, __pad4); + BUILD_BUG_SQE_ELEM(56, __u16, write_stream); BUILD_BUG_SQE_ELEM(56, __u64, __pad2); BUILD_BUG_ON(sizeof(struct io_uring_files_update) != diff --git a/io_uring/rw.c b/io_uring/rw.c index cce8bc2ecd3f..88a5b5f65a9b 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -279,7 +279,7 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe, rw->kiocb.ki_ioprio = get_current_ioprio(); } rw->kiocb.dio_complete = NULL; - + rw->kiocb.ki_write_stream = READ_ONCE(sqe->write_stream); rw->addr = READ_ONCE(sqe->addr); rw->len = READ_ONCE(sqe->len); rw->flags = READ_ONCE(sqe->rw_flags);