Commit 0c284db7 authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

nvme: check namespace head shared property 



Reject a new shared namespace if a duplicate unshared namespace exists.

Signed-off-by: default avatarKeith Busch <kbusch@kernel.org>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 9ad1927a

drivers/nvme/host/core.c

+2 −1
Original line number Diff line number Diff line
@@ -3496,8 +3496,9 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid, 
			ret = PTR_ERR(head);

			goto out_unlock;

		}

		head->shared = is_shared;

	} else {

		if (!is_shared) {

		if (!is_shared || !head->shared) {

			dev_err(ctrl->device,

				"Duplicate unshared namespace %d\n",

					nsid);

drivers/nvme/host/nvme.h

+1 −0
Original line number Diff line number Diff line
@@ -352,6 +352,7 @@ struct nvme_ns_head { 
	struct nvme_ns_ids	ids;

	struct list_head	entry;

	struct kref		ref;

	bool			shared;

	int			instance;

#ifdef CONFIG_NVME_MULTIPATH

	struct gendisk		*disk;

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