diff options
| author | Hannes Reinecke <hare@kernel.org> | 2024-04-03 13:31:14 +0200 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2024-04-04 08:35:49 -0700 |
| commit | 95409e277d8343810adf8700d29d4329828d452b (patch) | |
| tree | 750aea2f063bac98adccc85019353960acfa378e /drivers/nvme/target/core.c | |
| parent | 0551ec93a00d935efd86b45bf70cefdc4e515b65 (diff) | |
nvmet: implement unique discovery NQN
Unique discovery NQNs allow to differentiate between discovery
services from (typically physically separate) NVMe-oF subsystems.
This is required for establishing secured connections as otherwise
the credentials won't be unique and the integrity of the connection
cannot be guaranteed.
This patch adds a configfs attribute 'discovery_nqn' in the 'nvmet'
configfs directory to specify the unique discovery NQN.
Signed-off-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme/target/core.c')
| -rw-r--r-- | drivers/nvme/target/core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 6bbe4df0166c..8860a3eb71ec 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -1541,6 +1541,13 @@ static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port, } down_read(&nvmet_config_sem); + if (!strncmp(nvmet_disc_subsys->subsysnqn, subsysnqn, + NVMF_NQN_SIZE)) { + if (kref_get_unless_zero(&nvmet_disc_subsys->ref)) { + up_read(&nvmet_config_sem); + return nvmet_disc_subsys; + } + } list_for_each_entry(p, &port->subsystems, entry) { if (!strncmp(p->subsys->subsysnqn, subsysnqn, NVMF_NQN_SIZE)) { |