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From: Sagi Grimberg <sagi@grimberg.me>
To: Keith Busch <kbusch@kernel.org>
Cc: "Niklas Cassel" <Niklas.Cassel@wdc.com>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	"hch@lst.de" <hch@lst.de>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"axboe@kernel.dk" <axboe@kernel.dk>,
	"Javier González" <javier.gonz@samsung.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"Johannes Thumshirn" <Johannes.Thumshirn@wdc.com>,
	"Matias Bjorling" <Matias.Bjorling@wdc.com>,
	"Daniel Wagner" <dwagner@suse.de>
Subject: Re: [PATCHv3 3/5] nvme: implement I/O Command Sets Command Set support
Date: Wed, 24 Jun 2020 11:33:25 -0700
Message-ID: <76966a48-0588-3f3c-0ec1-842cd2ac413d@grimberg.me> (raw)
In-Reply-To: <1ddbf614-f5a7-a265-b1a2-7c5ed0922f18@grimberg.me>


>> If the controller does not support the CNS value, it may return Invalid
>> Field with DNR set. That error currently gets propogated back to
>> nvme_init_ns_head(), which then abandons the namespace. Just as the code
>> coments say, we had been historically been clearing such errors because
>> we have other ways to identify the namespace, but now we're not clearing
>> that error.
> 
> I don't understand what you are saying Keith.
> 
> My comment was for this block:
> -- 
>      if (!status && nvme_multi_css(ctrl) && !csi_seen) {
>          dev_warn(ctrl->device, "Command set not reported for nsid:%d\n",
>               nsid);
>          status = -EINVAL;
>      }
> -- 
> 
> I was saying that !status doesn't necessarily mean success, but it can
> also mean that its an retry-able error status (due to transport or
> controller). If we see a retry-able error we should still clear the
> status so we don't abandon the namespace.
> 
> This for example would achieve that:

Sorry, meant this:
--
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ba512c45b40f..3187cf768d08 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1130,8 +1130,14 @@ static int nvme_identify_ns_descs(struct 
nvme_ctrl *ctrl, unsigned nsid,
                   * Don't treat an error as fatal, as we potentially 
already
                   * have a NGUID or EUI-64.
                   */
-               if (status > 0 && !(status & NVME_SC_DNR))
+               if (status > 0 && !(status & NVME_SC_DNR)) {
                         status = 0;
+               } else if (status == 0 && nvme_multi_css(ctrl) && 
!csi_seen) {
+                               dev_warn(ctrl->device,
+                                       "Command set not reported for 
nsid:%d\n",
+                                       nsid);
+                               status = -EINVAL;
+               }
                 goto free_data;
         }
--

  reply index

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-22 16:25 [PATCHv3 0/5] nvme support for zoned namespace command set Keith Busch
2020-06-22 16:25 ` [PATCHv3 1/5] block: add capacity field to zone descriptors Keith Busch
2020-06-23  6:15   ` Hannes Reinecke
2020-06-23  8:44   ` Sagi Grimberg
2020-06-26 12:17   ` Jens Axboe
2020-06-22 16:25 ` [PATCHv3 2/5] null_blk: introduce zone capacity for zoned device Keith Busch
2020-06-23  6:16   ` Hannes Reinecke
2020-06-23  8:45   ` Sagi Grimberg
2020-06-22 16:25 ` [PATCHv3 3/5] nvme: implement I/O Command Sets Command Set support Keith Busch
2020-06-23  6:20   ` Hannes Reinecke
2020-06-23  9:20     ` Niklas Cassel
2020-06-23 14:25       ` Keith Busch
2020-06-23  8:53   ` Sagi Grimberg
2020-06-23 11:25     ` Niklas Cassel
2020-06-23 14:59       ` Keith Busch
2020-06-23 22:10       ` Keith Busch
2020-06-23 23:17         ` Sagi Grimberg
2020-06-24 17:25           ` Keith Busch
2020-06-24 17:46             ` Sagi Grimberg
2020-06-24 18:03               ` Keith Busch
2020-06-24 18:28                 ` Sagi Grimberg
2020-06-24 18:33                   ` Sagi Grimberg [this message]
2020-06-24 18:40                     ` Keith Busch
2020-06-24 19:03                       ` Sagi Grimberg
2020-06-24 21:49                         ` Keith Busch
2020-06-24 22:54                           ` Sagi Grimberg
2020-06-24 23:54                             ` Keith Busch
2020-06-23 23:20       ` Sagi Grimberg
2020-06-26  8:54     ` Christoph Hellwig
2020-06-22 16:25 ` [PATCHv3 4/5] nvme: support for multi-command set effects Keith Busch
2020-06-23  6:21   ` Hannes Reinecke
2020-06-23 17:43   ` Sagi Grimberg
2020-06-22 16:25 ` [PATCHv3 5/5] nvme: support for zoned namespaces Keith Busch
2020-06-22 16:48   ` Johannes Thumshirn
2020-06-23  6:23   ` Hannes Reinecke
2020-06-23 17:45   ` Sagi Grimberg
2020-06-24  9:11   ` Javier González
2020-06-29 13:53   ` Johannes Thumshirn

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