From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 9B2C22F90EA for ; Wed, 12 Nov 2025 09:38:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762940341; cv=none; b=coekc3sJ+HGnyXSKbnCcfeu3TTJiKY5n/D1OLrmuQMU3Ys2iYunvNWXdA9QNaiIZ2Lt9jv4aRkia3fStAsi89hxTTFrt+ynyOp23zv0el9WEGGhE4BRQX7qI+IHtXDLp2DV2C2to54mvlPRn8Jnbftl50gYfiWwaveHrkb+yWgQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762940341; c=relaxed/simple; bh=NQZWsOEQbPn+vCPqEybqXRGlPONtZ1FRQPBv4hG7hhg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i1gTSBFu+Kp7jYZiFFJuxtxcJKfYXiHVPZnewb6DBQXi5T7OSVGEAaZPDHjFklgY5k0JXqQWtr+bxBnWqtlV6ANWtxh7MV4jW3bw3YaNtXlgo1L2+mM4Hpo9BfxlG2JrW27L52NwLdrljvPLQxoOsbsv5qrGdRTnIL+jVTDT9rw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=E2TYPQuE; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="E2TYPQuE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1762940338; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EQwxSoMyy1EE+h2folUEm/rEUMUBUsPlDN9rNRjoQ8w=; b=E2TYPQuE3sa0VzUekkRjBSTyQ71v0GCh9aafhYa7siHQBY7Wev1n/99sBrvTVHbDkYYZOL tDFv1ykmlyJm1J79HHvMhQaGIGKYcKzT303ANBHuYtUzNrTWCX9otNqJ17kYERJ2o48WMP WSHvHZ7uQ89ShF8ehfVmkHWJrtc1RJo= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-203-pNR5lSwXO1y4t4mmODw3Zw-1; Wed, 12 Nov 2025 04:38:57 -0500 X-MC-Unique: pNR5lSwXO1y4t4mmODw3Zw-1 X-Mimecast-MFC-AGG-ID: pNR5lSwXO1y4t4mmODw3Zw_1762940336 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 24AD519560AE; Wed, 12 Nov 2025 09:38:56 +0000 (UTC) Received: from localhost (unknown [10.72.116.179]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4A9BC30044E7; Wed, 12 Nov 2025 09:38:54 +0000 (UTC) From: Ming Lei To: Jens Axboe , linux-block@vger.kernel.org Cc: Caleb Sander Mateos , Uday Shankar , Ming Lei Subject: [PATCH V3 06/27] ublk: add helper of __ublk_fetch() Date: Wed, 12 Nov 2025 17:37:44 +0800 Message-ID: <20251112093808.2134129-7-ming.lei@redhat.com> In-Reply-To: <20251112093808.2134129-1-ming.lei@redhat.com> References: <20251112093808.2134129-1-ming.lei@redhat.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Add helper __ublk_fetch() for refactoring ublk_fetch(). Meantime move ublk_config_io_buf() out of __ublk_fetch() to make the code structure cleaner. Signed-off-by: Ming Lei --- drivers/block/ublk_drv.c | 46 +++++++++++++++++++++------------------- 1 file changed, 24 insertions(+), 22 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 5e83c1b2a69e..dd9c35758a46 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -2234,39 +2234,41 @@ static int ublk_check_fetch_buf(const struct ublk_device *ub, __u64 buf_addr) return 0; } -static int ublk_fetch(struct io_uring_cmd *cmd, struct ublk_device *ub, - struct ublk_io *io, __u64 buf_addr) +static int __ublk_fetch(struct io_uring_cmd *cmd, struct ublk_device *ub, + struct ublk_io *io) { - int ret = 0; - - /* - * When handling FETCH command for setting up ublk uring queue, - * ub->mutex is the innermost lock, and we won't block for handling - * FETCH, so it is fine even for IO_URING_F_NONBLOCK. - */ - mutex_lock(&ub->mutex); /* UBLK_IO_FETCH_REQ is only allowed before dev is setup */ - if (ublk_dev_ready(ub)) { - ret = -EBUSY; - goto out; - } + if (ublk_dev_ready(ub)) + return -EBUSY; /* allow each command to be FETCHed at most once */ - if (io->flags & UBLK_IO_FLAG_ACTIVE) { - ret = -EINVAL; - goto out; - } + if (io->flags & UBLK_IO_FLAG_ACTIVE) + return -EINVAL; WARN_ON_ONCE(io->flags & UBLK_IO_FLAG_OWNED_BY_SRV); ublk_fill_io_cmd(io, cmd); - ret = ublk_config_io_buf(ub, io, cmd, buf_addr, NULL); - if (ret) - goto out; WRITE_ONCE(io->task, get_task_struct(current)); ublk_mark_io_ready(ub); -out: + + return 0; +} + +static int ublk_fetch(struct io_uring_cmd *cmd, struct ublk_device *ub, + struct ublk_io *io, __u64 buf_addr) +{ + int ret; + + /* + * When handling FETCH command for setting up ublk uring queue, + * ub->mutex is the innermost lock, and we won't block for handling + * FETCH, so it is fine even for IO_URING_F_NONBLOCK. + */ + mutex_lock(&ub->mutex); + ret = __ublk_fetch(cmd, ub, io); + if (!ret) + ret = ublk_config_io_buf(ub, io, cmd, buf_addr, NULL); mutex_unlock(&ub->mutex); return ret; } -- 2.47.0