Commit f39ae471 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe

nvmet: return all zeroed buffer when we can't find an active namespace

Quote from Figure 106 in NVMe 1.3a:

  The Identify Namespace data structure is returned to the host for the
  namespace specified in the Namespace Identifier (CDW1.NSID) field if it
  is an active NSID. If the specified namespace is not an active NSID,
  then the controller returns a zero filled data structure.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarSagi Grimberg <sagi@rimberg.me>
Reviewed-by: default avatarMax Gurtovoy <maxg@mellanox.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 28dec870
......@@ -270,8 +270,7 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
struct nvme_id_ns *id;
u16 status = 0;
ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
if (!ns) {
if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
status = NVME_SC_INVALID_NS | NVME_SC_DNR;
goto out;
}
......@@ -279,9 +278,14 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
id = kzalloc(sizeof(*id), GFP_KERNEL);
if (!id) {
status = NVME_SC_INTERNAL;
goto out_put_ns;
goto out;
}
/* return an all zeroed buffer if we can't find an active namespace */
ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
if (!ns)
goto done;
/*
* nuse = ncap = nsze isn't always true, but we have no way to find
* that out from the underlying device.
......@@ -306,11 +310,10 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
id->lbaf[0].ds = ns->blksize_shift;
nvmet_put_namespace(ns);
done:
status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
kfree(id);
out_put_ns:
nvmet_put_namespace(ns);
out:
nvmet_req_complete(req, status);
}
......
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