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nvmet: never fail double namespace enablement

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In case we create N namespaces while N < NVMET_MAX_NAMESPACES, we can
perform "echo 1 > <nsid>/enable" as much as we want. In case N ==
NVMET_MAX_NAMESPACES we fail. Make sure we have the same flow for any N.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Max Gurtovoy 2019-04-02 14:52:47 +03:00 committed by Christoph Hellwig
parent 70479b71bc
commit e84c2091a4
1 changed files with 4 additions and 3 deletions
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7
drivers/nvme/target/core.c
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@ -494,13 +494,14 @@ int nvmet_ns_enable(struct nvmet_ns *ns)
int ret;
mutex_lock(&subsys->lock);
ret = -EMFILE;
if (subsys->nr_namespaces == NVMET_MAX_NAMESPACES)
goto out_unlock;
ret = 0;
if (ns->enabled)
goto out_unlock;
ret = -EMFILE;
if (subsys->nr_namespaces == NVMET_MAX_NAMESPACES)
goto out_unlock;
ret = nvmet_bdev_ns_enable(ns);
if (ret == -ENOTBLK)
ret = nvmet_file_ns_enable(ns);