From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.87 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794170909; b=HGsE7JDjn0KXJhGQemFpBAHL0r9F7QpyeMsjsE7eP2VeLrdoLRfq+6hnsGIhojx9PvJs yNFbu63dUumX7kAnxAWTt/0qifmJ8M7hd/KRdECc0i0rPk6RG02sObQoxzwy9Sh6RQhSK mZ4qAbMDPGi442DsiZSIzM3bZeEYAco8jV1bJoLXNRGzZw40XcvE9tUS3qbxS5+H247JV xmG0rStyKKZSBgqN6Twc49XArPNpFo6on4xbHMbWMwn34NHnXbO+9wMY3lh0NvmdiJnHh W2XKTQkaBbYq7Nf6nIJO7/XbuCPfe56bUfaTjYDLJKfEB8RRmjW23wEfMERSXkleT+g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794170909; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=aLBSphUPpkQSmk/BQU8w4WnHJtgwOWRaiwq4m3R70Zc=; b=FCwAgbehYPQ5Z7Ag4SMez8rAVdtya4qwrebFZXu+iKuVK74SEiGDJCkA+KAYWpgfaM2P mFWyGNotl+13SjMGLCLFXDj6IMQBfRDeN3zhEj1u+ohIUxMel/+moVwTtNDrPDVgmANfD Zmz4YqAQo/rNJTAKnxblse2DO+PyxrSNN0Q+3hTQJheUueo/2p7FIApXKEXjM6j0iRduu mIBLWkSfs1niD1twDpuQXvJPqnCK7dlHA4RrQtlSOxwkhuuqDjl3NFKyqz46YteKeidWQ yCb252MbRQtSwrxC+AjnGTI7TXt1+JmBAlreGBY6i1apiHNIg++aqD0OKV2jUruOpyg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=CuTd5rkN; arc=none smtp.remote-ip=91.218.175.87 Received: from mta0.migadu.com (out-87.mta0.migadu.com [91.218.175.87]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5FC3D606D82A for ; Sun, 8 Nov 2026 20:48:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 5FC3D606D82A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=CuTd5rkN X-Envelope-To: linux-scsi@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=yUyDco5Tbx6PoduIOfYi9iHiRgOj0lG9rUJG6HkMHEY=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794170906; v=1; x=1794775706; b=CuTd5rkNsbW27Id7uZBFk7XgMqScOKbnoGAu7ZTJ1i8d3IwtTjQcEBSRZF/H5PRAafYOBKeM DpAataKvwRUoeSPFfJ2MmuQRaTtAPwKYJExNrI3K/BmZ2naPhy1q3jS/NLuNdGnNTC7RZ/684hF i7ZnqS3BmMmF3c2x+cv6ohYk= X-Envelope-To: linux-scsi@vger.kernel.org Received: by mta10.migadu.com with ESMTPS id 37ce54ce466a1928; Sun, 08 Nov 2026 20:48:25 +0000 X-Mizu-Trace-ID: 37ce54ce466a1928 X-Migadu-Flow: FLOW_OUT From: John Garry To: james.bottomley@hansenpartnership.com, mkp@kernel.org Cc: hare@suse.com, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, snitzer@kernel.org, jmeneghi@redhat.com, bmarzins@redhat.com, dm-devel@lists.linux.dev, hch@lst.de, michael.christie@oracle.com, John Garry Subject: [PATCH v9 28/29] scsi: sd: add mpath_numa_nodes dev attribute Date: Sun, 8 Nov 2026 20:47:32 +0000 Message-ID: <20261108204733.557995-29-john.garry@linux.dev> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261108204733.557995-1-john.garry@linux.dev> References: <20261108204733.557995-1-john.garry@linux.dev> X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add an attribute to show multipath NUMA node per-path (scsi_disk). The following is an example of reading the file: $ cat /sys/devices/platform/host8/session1/target8:0:0/8:0:0:0/block/sdc:0/numa_ mpath_numa_nodes 0-3 $ cat /sys/devices/platform/host9/session2/target9:0:0/9:0:0:0/block/sdc:1/numa_ mpath_numa_nodes $ Signed-off-by: John Garry --- drivers/scsi/sd.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 8469feb9ba5f..5ea604c4bbb0 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -4165,8 +4165,22 @@ static ssize_t sd_mpath_dev_show(struct device *dev, } static DEVICE_ATTR(mpath_dev, 0444, sd_mpath_dev_show, NULL); +static ssize_t sd_mpath_numa_nodes_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct gendisk *gd = dev_to_disk(dev); + struct scsi_disk *sdkp = gd->private_data; + struct scsi_device *sdev = sdkp->device; + struct scsi_mpath_device *scsi_mpath_dev = sdev->scsi_mpath_dev; + struct mpath_device *mpath_device = &scsi_mpath_dev->mpath_device; + + return mpath_numa_nodes_show(mpath_device, buf); +} +static DEVICE_ATTR(mpath_numa_nodes, 0444, sd_mpath_numa_nodes_show, NULL); + static struct attribute *sd_mpath_dev_attrs[] = { &dev_attr_mpath_dev.attr, + &dev_attr_mpath_numa_nodes.attr, NULL }; -- 2.43.0