linux-kernel - [PATCH] nvme: lightnvm: expose OC devices as zero size to OS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1552570910-11706-1-git-send-email-marcin.dziegielewski@intel.com>
Date:   Thu, 14 Mar 2019 14:41:49 +0100
From:   Marcin Dziegielewski <marcin.dziegielewski@...el.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     mb@...htnvm.io, igor.j.konopko@...el.com,
        Marcin Dziegielewski <marcin.dziegielewski@...el.com>,
        Keith Busch <keith.busch@...el.com>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] nvme: lightnvm: expose OC devices as zero size to OS

Open channel devices are not able to handle traditional
IO requests addressed by LBA, so following current
approach to exposing special nvme devices as zero size
(e.g. with namespace formatted to use metadata) also
open channel devices should be exposed as zero size
to OS.

Signed-off-by: Marcin Dziegielewski <marcin.dziegielewski@...el.com>
---
 drivers/nvme/host/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 07bf2bf..52cd5c8 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1606,7 +1606,8 @@ static void nvme_update_disk_info(struct gendisk *disk,
 	if (ns->ms && !ns->ext &&
 	    (ns->ctrl->ops->flags & NVME_F_METADATA_SUPPORTED))
 		nvme_init_integrity(disk, ns->ms, ns->pi_type);
-	if (ns->ms && !nvme_ns_has_pi(ns) && !blk_get_integrity(disk))
+	if ((ns->ms && !nvme_ns_has_pi(ns) && !blk_get_integrity(disk)) ||
+	    ns->ndev)
 		capacity = 0;
 
 	set_capacity(disk, capacity);
-- 
1.8.3.1