linux-kernel - Re: [PATCH v4 0/4] nvme: add csi, ms and nuse to sysfs

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Date:   Thu, 7 Dec 2023 16:31:38 +0100
From:   Christoph Hellwig <hch@....de>
To:     Daniel Wagner <dwagner@...e.de>
Cc:     linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCH v4 0/4] nvme: add csi, ms and nuse to sysfs

Hi Daniel,

this looks generally good to me.  A few comments, all but one are
cosmetic.

> @@ -1676,9 +1678,9 @@ static void nvme_init_integrity(struct gendisk *disk, struct nvme_ns *ns,

This an now take the ns_head instead of the ns.

> @@ -1776,11 +1778,11 @@ static int nvme_init_ms(struct nvme_ns *ns, struct nvme_id_ns *id)

This can take a ctrl and ns_head instead of the ns.

> @@ -1835,8 +1837,8 @@ static int nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id)

This as well after updating nvme_ns_has_pi to take the ns_head.

> @@ -1898,7 +1900,7 @@ static void nvme_update_disk_info(struct gendisk *disk,
>  		struct nvme_ns *ns, struct nvme_id_ns *id)

This as well after fixing up nvme_lba_to_sect to take the ns_head.

> @@ -2052,7 +2055,7 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns,

This one as well.

> @@ -128,7 +129,7 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns,
>  				   sizeof(struct nvme_zone_descriptor);
>  
>  	nr_zones = min_t(unsigned int, nr_zones,
> -			 get_capacity(ns->disk) >> ilog2(ns->zsze));
> +			 get_capacity(ns->head->disk) >> ilog2(ns->head->zsze));

This doesn't work, as the head disk doesn't exist for !multipath setups.

> @@ -162,7 +163,7 @@ static int nvme_zone_parse_entry(struct nvme_ns *ns,

This could do with ctrl + ns_head now