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nvme: check namespace head shared property 

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

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2020-04-09 09:09:02 -07:00 committed by Jens Axboe
parent 9ad1927a3b
commit 0c284db7f2
2 changed files with 3 additions and 1 deletions
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3
drivers/nvme/host/core.c
View File

@ -3496,8 +3496,9 @@ static int nvme_init_ns_head(struct nvme_ns *ns, unsigned nsid,
ret = PTR_ERR(head); ret = PTR_ERR(head);
goto out_unlock; goto out_unlock;
} }
head->shared = is_shared;
} else { } else {
if (!is_shared) { if (!is_shared || !head->shared) {
dev_err(ctrl->device, dev_err(ctrl->device,
"Duplicate unshared namespace %d\n", "Duplicate unshared namespace %d\n",
nsid); nsid);

1
drivers/nvme/host/nvme.h
View File

@ -352,6 +352,7 @@ struct nvme_ns_head {
struct nvme_ns_ids ids; struct nvme_ns_ids ids;
struct list_head entry; struct list_head entry;
struct kref ref; struct kref ref;
bool shared;
int instance; int instance;
#ifdef CONFIG_NVME_MULTIPATH #ifdef CONFIG_NVME_MULTIPATH
struct gendisk *disk; struct gendisk *disk;