From patchwork Wed Aug 14 10:45:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 13763328 Received: from mail-ed1-f44.google.com (mail-ed1-f44.google.com [209.85.208.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F63E1448D4; Wed, 14 Aug 2024 10:45:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723632327; cv=none; b=ed+TT9i/xz0+sRmcJAcYPLagctFQC2+4VdjlT0m68fXuOqZK3hOPo7dHmqe2qDg1CdO61CHG0VMaSACwAQS2IyaV+gN/9uLK8UYzsgZP+sRFKC0FK7Emjr1PewQimWchdKprzHvdsAdrOGP3fUQiTTMbyXFf2j4ChnDDlaCmDSg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723632327; c=relaxed/simple; bh=xgZK/jw8ZlQXj8cIxR0W7ybGVnlcP1lJNS+9Q/l9a0s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LWn/Ya61A61X+tMxdjfTQV8buC8ewMq29qQmxnpMNppqR7I4UfWDeaDE8A0aEIIsY4a05L8JzBXLz8v+xyRnaZIfTK0zFYuqid/FMUKUUa//2E1rEwTQctK4POVzSkq1vMyzd66HZnD0IyXMint+GhT4F0j8f1aIe1YOCOk9rqk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=MYb7WkV9; arc=none smtp.client-ip=209.85.208.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MYb7WkV9" Received: by mail-ed1-f44.google.com with SMTP id 4fb4d7f45d1cf-5b01af9b0c9so6814695a12.3; Wed, 14 Aug 2024 03:45:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1723632324; x=1724237124; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=yyZRXxiAI12SAMIbkwT8bn9l7S8e/TKEaLOeKBVDL1c=; b=MYb7WkV9t56ofqod+2slCDpOk8holAVgjR1BFVA6vgPnNPHvbK8wgKv7CLmw0L506G /KkJql3H0r/gOK/+bJXfBL9Vuwia9G8MkzIMd1UnhwWCpdBEtdk8Jg36xCETjo1fAzPx BeC2ocCpDtRp6oo0NWtrs4/pAWHDSEFB5UcGYazkGGGKQTFwxLz015FsEshzE1xSs8j4 nQLueXHKvRFzpndqRluQtD0HNE/C6+g8DCP7rdeRp+uGekDpS0NdYTuymwybgDvOgegv 7gy8h1IEakEvgaU5ATPSM0CHblXy/vdyJVpnHqAoRXq55QV67DIcp8qeCuh/u/9N/TY7 dFeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723632324; x=1724237124; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=yyZRXxiAI12SAMIbkwT8bn9l7S8e/TKEaLOeKBVDL1c=; b=I6JAM+wZY7/tqadQUOW1dK5lpWCKU6pAGscwQa8qHJU7SySBVC3rd0JQB6nD4DE7En ZVBGF7mzXbpr6FJDp5yBAfQdwnmmTM+BLXySCNSYcEj7PMvktWM5xLFF9jk2rf3U88Gs xQzKn+kbl5Pf1KE5PdS7272RdoUSY0xqRox1eXBMoz+U0BIqPNx88jLgw/5VyJG5fywa fSitsMq4vb7kpIROR22rhE+5NUjuWxV0u1dSelpyDiIOlYXd0pYBqIx7Y3RGzenxnQtK yrr0hl4IgXM+QuLhthb4mJfZGgVwcQb45/3dmRNMYPaVweHDt1XPEAYI8QW8C6dNTd53 SJ9A== X-Forwarded-Encrypted: i=1; AJvYcCW5mRbf3P2op8QmA24XJWC86dw/nBkCAZxkNHwuRUZn5QlIkvmJXM+Zo05O1wjuZx1Qq3YZxkl6Qcmp73LlKSznLS3ST+xICtnJUTo= X-Gm-Message-State: AOJu0YzEStKKsPdLqxqzY9gF8EaeoTEscnJpRwzpt1eQ1ufUmp572avy rl8HRtD3etznQ9U7ZdgTkQRYgoPUcEHtRyhy2sNG4mVakXzart88it5lGbQa X-Google-Smtp-Source: AGHT+IF0FJ+sTAvpOE9fJ0iyXXmALD7st6qSqWtNfVEYLYX577G+yNnVuj6lODfTWpASdYrnqFEhoA== X-Received: by 2002:a17:907:e6d1:b0:a77:cf9d:f495 with SMTP id a640c23a62f3a-a8366d658cfmr180030066b.40.1723632324005; Wed, 14 Aug 2024 03:45:24 -0700 (PDT) Received: from 127.0.0.1localhost ([148.252.132.251]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a80f418692asm157212766b.224.2024.08.14.03.45.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Aug 2024 03:45:23 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: Jens Axboe , asml.silence@gmail.com, Conrad Meyer , linux-block@vger.kernel.org, linux-mm@kvack.org Subject: [RFC 2/5] io_uring/cmd: give inline space in request to cmds Date: Wed, 14 Aug 2024 11:45:51 +0100 Message-ID: <86ae0042c57c5904b40e19f6171f47fd3e8c6126.1723601134.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Some io_uring commands can use some inline space in io_kiocb. We have 32 bytes in struct io_uring_cmd, expose it. Signed-off-by: Pavel Begunkov --- include/linux/io_uring/cmd.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h index 86ceb3383e49..c189d36ad55e 100644 --- a/include/linux/io_uring/cmd.h +++ b/include/linux/io_uring/cmd.h @@ -23,6 +23,15 @@ static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) return sqe->cmd; } +static inline void io_uring_cmd_private_sz_check(size_t cmd_sz) +{ + BUILD_BUG_ON(cmd_sz > sizeof_field(struct io_uring_cmd, pdu)); +} +#define io_uring_cmd_to_pdu(cmd, pdu_type) ( \ + io_uring_cmd_private_sz_check(sizeof(pdu_type)), \ + ((pdu_type *)&(cmd)->pdu) \ +) + #if defined(CONFIG_IO_URING) int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, struct iov_iter *iter, void *ioucmd);