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 F319E30B51E for ; Tue, 3 Mar 2026 05:32:02 +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=1772515925; cv=none; b=JO5nu947YpxT3SftNO/oM/jTmbxfOZXbscdDXS1p8yCQ42NQEgkGBBo+/0lTCbzOS8WGFjh4PHTgpLpmZFob7A/y7DHKzSwVYYMSH4n/drExaG+D7Prrg+9mdpHbL44ofF9bU0JXDoaE4G9EyBtdUuN7XoZ/nQrh9/mgbukK35M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772515925; c=relaxed/simple; bh=C8yJhHxPL64zlBkc4SFPQfPBrFzw3wXhpcuOs1Ru1pA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EU486/I6vvDvnGKogR9Qt5XS0jjxDzyXMxQMHmLQX9/9kTz/JdW33rcTVW11GK1JKaCqWQyz5/7B6vnSWPT9JVBh74ztU0Db6F05Co8MzUap9XzA8jKs7jv71cSwTiMRGnZyOuqxOPQ3EEOXBcwbKCEkXpV1cKdvjTDI1vLdhFc= 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=WBMOdWXA; 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="WBMOdWXA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772515922; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=rk8SfGWznxs8PCnNuzIOKZoorLz2mCPwrChTHvdhTxs=; b=WBMOdWXA2vb4CzZUjlBBP+p1Sk1RMHYmOV75EyFxPry1FPvXZ1dDXWLboyhSrkAHyIgPL4 yy/8DhyThIP4kedbQNSOlm5Pc82w/IvUKjRBmzOaBacG6GUONs43WxpCzxY4ZPspVzGEHU HVKH0vv0qOM826RmrujG7hBvlpcrJds= Received: from mx-prod-mc-01.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-695-3y5x-f46Mfu3DVitalfYUw-1; Tue, 03 Mar 2026 00:31:59 -0500 X-MC-Unique: 3y5x-f46Mfu3DVitalfYUw-1 X-Mimecast-MFC-AGG-ID: 3y5x-f46Mfu3DVitalfYUw_1772515917 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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 81A4119560B2; Tue, 3 Mar 2026 05:31:55 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (unknown [10.6.23.247]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A608130001B9; Tue, 3 Mar 2026 05:31:53 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (localhost [127.0.0.1]) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.17.1) with ESMTPS id 6235VqTB1875154 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 3 Mar 2026 00:31:52 -0500 Received: (from bmarzins@localhost) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.18.1/Submit) id 6235Vp3B1875151; Tue, 3 Mar 2026 00:31:51 -0500 Date: Tue, 3 Mar 2026 00:31:51 -0500 From: Benjamin Marzinski To: John Garry Cc: hch@lst.de, kbusch@kernel.org, sagi@grimberg.me, axboe@fb.com, martin.petersen@oracle.com, james.bottomley@hansenpartnership.com, hare@suse.com, jmeneghi@redhat.com, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, michael.christie@oracle.com, snitzer@kernel.org, dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 12/24] scsi-multipath: provide callbacks for path state Message-ID: References: <20260225153627.1032500-1-john.g.garry@oracle.com> <20260225153627.1032500-13-john.g.garry@oracle.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260225153627.1032500-13-john.g.garry@oracle.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 On Wed, Feb 25, 2026 at 03:36:15PM +0000, John Garry wrote: > Until ALUA is supported, just always say that the path is optimized. In > addition, just add basic scsi_device state tests for checking on path > state. > > Signed-off-by: John Garry > --- > drivers/scsi/scsi_multipath.c | 45 +++++++++++++++++++++++++++++++++++ > 1 file changed, 45 insertions(+) > > diff --git a/drivers/scsi/scsi_multipath.c b/drivers/scsi/scsi_multipath.c > index 36f13605b44e7..6aeac20a350ff 100644 > --- a/drivers/scsi/scsi_multipath.c > +++ b/drivers/scsi/scsi_multipath.c > @@ -340,8 +340,53 @@ static int scsi_mpath_ioctl(struct block_device *bdev, > return err; > } > > +static bool scsi_mpath_is_disabled(struct mpath_device *mpath_device) > +{ > + struct scsi_mpath_device *scsi_mpath_dev = > + to_scsi_mpath_device(mpath_device); > + struct scsi_device *sdev = scsi_mpath_dev->sdev; > + enum scsi_device_state sdev_state = sdev->sdev_state; > + > + if (sdev_state == SDEV_RUNNING || sdev_state == SDEV_CANCEL) > + return false; > + > + return true; > +} > + > +static bool scsi_mpath_is_optimized(struct mpath_device *mpath_device) > +{ > + if (scsi_mpath_is_disabled(mpath_device)) > + return false; > + return true; > +} > + > +/* Until we have ALUA support, we're always optimised */ > +static enum mpath_access_state scsi_mpath_get_access_state( > + struct mpath_device *mpath_device) > +{ > + if (scsi_mpath_is_disabled(mpath_device)) > + return MPATH_STATE_INVALID; > + return MPATH_STATE_OPTIMIZED; > +} > + > +static bool scsi_mpath_available_path(struct mpath_device *mpath_device, bool *available) > +{ > + struct scsi_mpath_device *scsi_mpath_dev = > + to_scsi_mpath_device(mpath_device); > + struct scsi_device *sdev = scsi_mpath_dev->sdev; > + > + if (scsi_device_blocked(sdev)) > + return false; > + > + return scsi_device_online(sdev); > +} Here's another vote for redoing the mpath_available_path() interface. scsi_mpath_available_path() is already ignoring the available pointer, and treating the return value like it determines whether the path is available. -Ben