From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch adds a nvmf_get_default_host() helper used to
setup nvmf_ctrl_options->host to internal nvmf_default_host
reference, following existing nvmf_parse_options() code.
Note it's required for nvme-loop multi-controller support,
in order to drive nvmet_port creation directly via configfs
attribute write from in ../nvmet/subsystems/$NQN/ports/$PORT/
group context.
Cc: Jens Axboe <axboe@xxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Jay Freyensee <james.p.freyensee@xxxxxxxxx>
Cc: Martin Petersen <martin.petersen@xxxxxxxxxx>
Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Mike Christie <michaelc@xxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/nvme/host/fabrics.c | 13 +++++++++++--
drivers/nvme/host/fabrics.h | 1 +
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index ee4b7f1..04317be 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -497,6 +497,16 @@ static struct nvmf_transport_ops *nvmf_lookup_transport(
return NULL;
}
+void nvmf_get_default_host(struct nvmf_ctrl_options *opts)
+{
+ if (opts->host)
+ return;
+
+ kref_get(&nvmf_default_host->ref);
+ opts->host = nvmf_default_host;
+}
+EXPORT_SYMBOL_GPL(nvmf_get_default_host);
+
static const match_table_t opt_tokens = {
{ NVMF_OPT_TRANSPORT, "transport=%s" },
{ NVMF_OPT_TRADDR, "traddr=%s" },
@@ -686,8 +696,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
}
if (!opts->host) {
- kref_get(&nvmf_default_host->ref);
- opts->host = nvmf_default_host;
+ nvmf_get_default_host(opts);
}
out:
diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index b540674..73ef7a7 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -128,6 +128,7 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl);
int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid);
void nvmf_register_transport(struct nvmf_transport_ops *ops);
void nvmf_unregister_transport(struct nvmf_transport_ops *ops);
+void nvmf_get_default_host(struct nvmf_ctrl_options *opts);
void nvmf_free_options(struct nvmf_ctrl_options *opts);
const char *nvmf_get_subsysnqn(struct nvme_ctrl *ctrl);
int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size);
--
1.9.1
--
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