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nvme: warn about shared namespaces without CONFIG_NVME_MULTIPATH

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Start warning about exposing a namespace as multiple block devices,
and set a fixed deprecation release.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Christoph Hellwig 2022-03-15 13:27:07 +01:00
parent e559398f47
commit ce8d78616a
2 changed files with 9 additions and 0 deletions
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1
drivers/block/loop.c
View file

@ -2092,6 +2092,7 @@ static void loop_remove(struct loop_device *lo)
del_gendisk(lo->lo_disk); del_gendisk(lo->lo_disk);
blk_cleanup_disk(lo->lo_disk); blk_cleanup_disk(lo->lo_disk);
blk_mq_free_tag_set(&lo->tag_set); blk_mq_free_tag_set(&lo->tag_set);
mutex_lock(&loop_ctl_mutex); mutex_lock(&loop_ctl_mutex);
idr_remove(&loop_index_idr, lo->lo_number); idr_remove(&loop_index_idr, lo->lo_number);
mutex_unlock(&loop_ctl_mutex); mutex_unlock(&loop_ctl_mutex);

8
drivers/nvme/host/core.c
View file

@ -3855,6 +3855,14 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
nsid); nsid);
goto out_put_ns_head; goto out_put_ns_head;
} }
if (!multipath && !list_empty(&head->list)) {
dev_warn(ctrl->device,
"Found shared namespace %d, but multipathing not supported.\n",
nsid);
dev_warn_once(ctrl->device,
"Support for shared namespaces without CONFIG_NVME_MULTIPATH is deprecated and will be removed in Linux 6.0\n.");
}
} }
list_add_tail_rcu(&ns->siblings, &head->list); list_add_tail_rcu(&ns->siblings, &head->list);