From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.91 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794170910; b=O8QlS3eZUQ2b4JHL5Q17h+8HbE7bTZl6dZKBfZ9ZpXPi0GjhndxRgc5FW6+sA1ImZBaU TJVCKXRBThbI4ihcVFFJ1P8jpYND3Yw3nK7I7tvu31bGDz9WXAjvWE+t46dQHICwlT6Fg VoCN9pQkVfNJGAE5SomU5lxO4MvZRnGXPAuTruFEZMY+Z0QCLUoONT3E+Lq86Xl8S0Vrb cCi20Lb5/XSlF9rDLQ5me+ttrNVDDV+M4TQGbd52RM3FZZkZIUhpaRSzTDlIiamma9Bc4 Rzhq5sRzJOBpgRsl8yLPGEbTRnHZkVZ1LYIuwta9rnrw4L6GaYsmL995l37PE6Xoa6g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794170910; 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=U2xG8uBDS3ZX6a/oBks6CKUJxumAGYWP5iIhTx2myFE=; b=Er7yRx4vcOgqX6y2Phl0p8H0mXMUCBmqhJaL+E3ni3wvx/9T3KV7XmlOwcM/WdOKKdiu +0xnHgRhOL5wIcJb2GODsKpl4vD+GlFOJ3RbqyQJjXTJGxNENZWeb+Ddt0ZSEysuqEyoU DPtiTBpOQOdbRmxKPTCEw+zNbz4ErxYzXHbjL5CrC0q6bhf4fEFHcaVpPt90IFC8Ybbhm yK8Bmk1LcKl13k+zUIz2v7/bJOrTui5XiEikFf+FoODqssZHFuPTZLtxCootvATjQw+wI AIK5cIl17nz6rW5QGwjy6v32QOAu5Z7ArhbeIGOlGwNEDk5PWHHySkti1BQ8yD14WtA== 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=BBtI6KRw; arc=none smtp.remote-ip=91.218.175.91 Received: from mta0.migadu.com (out-91.mta0.migadu.com [91.218.175.91]) (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 0FE08606D810 for ; Sun, 8 Nov 2026 20:48:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 0FE08606D810 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=BBtI6KRw X-Envelope-To: linux-scsi@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=H0+4Td4UmVtpFq6ZyOOwjEU0diM7bm7DIDQy7pV4k4k=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794170908; v=1; x=1794775708; b=BBtI6KRwD+LgJiIsK0tbzEbJR7XsAlORonJND3gVANNlrjgRXyd1H+m32fr7hZVUC4xoDS1p i4s7LfzLzOygTVkWCc25DuTs6H8vBPkpEKrrMR1Hypwz05btOwR/atXuAINj2ux4LsaHuQPWduz eYvMAEqwCdrmO6J9UfsKowEk= X-Envelope-To: linux-scsi@vger.kernel.org Received: by mta10.migadu.com with ESMTPS id a74b715b38ffa497; Sun, 08 Nov 2026 20:48:26 +0000 X-Mizu-Trace-ID: a74b715b38ffa497 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 29/29] scsi: sd: add mpath_queue_depth dev attribute Date: Sun, 8 Nov 2026 20:47:33 +0000 Message-ID: <20261108204733.557995-30-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 a queue_depth file so that the multipath dynamic queue depth can be looked up from per-path gendisk (scsi_disk) directory. Signed-off-by: John Garry --- drivers/scsi/sd.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 5ea604c4bbb0..29ac1ee806c5 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -4178,9 +4178,28 @@ static ssize_t sd_mpath_numa_nodes_show(struct device *dev, } static DEVICE_ATTR(mpath_numa_nodes, 0444, sd_mpath_numa_nodes_show, NULL); +static ssize_t sd_mpath_queue_depth_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 scsi_mpath_head *scsi_mpath_head = + scsi_mpath_dev->scsi_mpath_head; + struct Scsi_Host *shost = sdev->host; + + if (!mpath_qd_iopolicy(&scsi_mpath_head->iopolicy)) + return 0; + + return sysfs_emit(buf, "%d\n", atomic_read(&shost->mpath_nr_active)); +} +static DEVICE_ATTR(mpath_queue_depth, 0444, sd_mpath_queue_depth_show, NULL); + static struct attribute *sd_mpath_dev_attrs[] = { &dev_attr_mpath_dev.attr, &dev_attr_mpath_numa_nodes.attr, + &dev_attr_mpath_queue_depth.attr, NULL }; -- 2.43.0