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nvmet-fc: implement host_traddr()

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Implement callback to display the host transport address by
adding a callback 'host_traddr' for nvmet_fc_target_template.

Signed-off-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Hannes Reinecke 2024-05-27 07:15:23 +02:00 committed by Keith Busch
parent c7ea20c3af
commit 99032e9dba
2 changed files with 37 additions and 0 deletions
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33
drivers/nvme/target/fc.c
View File

@ -2934,6 +2934,38 @@ nvmet_fc_discovery_chg(struct nvmet_port *port)
tgtport->ops->discovery_event(&tgtport->fc_target_port);
}
static ssize_t
nvmet_fc_host_traddr(struct nvmet_ctrl *ctrl,
char *traddr, size_t traddr_size)
{
struct nvmet_sq *sq = ctrl->sqs[0];
struct nvmet_fc_tgt_queue *queue =
container_of(sq, struct nvmet_fc_tgt_queue, nvme_sq);
struct nvmet_fc_tgtport *tgtport = queue->assoc ? queue->assoc->tgtport : NULL;
struct nvmet_fc_hostport *hostport = queue->assoc ? queue->assoc->hostport : NULL;
u64 wwnn, wwpn;
ssize_t ret = 0;
if (!tgtport || !nvmet_fc_tgtport_get(tgtport))
return -ENODEV;
if (!hostport || !nvmet_fc_hostport_get(hostport)) {
ret = -ENODEV;
goto out_put;
}
if (tgtport->ops->host_traddr) {
ret = tgtport->ops->host_traddr(hostport->hosthandle, &wwnn, &wwpn);
if (ret)
goto out_put_host;
ret = snprintf(traddr, traddr_size, "nn-0x%llx:pn-0x%llx", wwnn, wwpn);
}
out_put_host:
nvmet_fc_hostport_put(hostport);
out_put:
nvmet_fc_tgtport_put(tgtport);
return ret;
}
static const struct nvmet_fabrics_ops nvmet_fc_tgt_fcp_ops = {
.owner = THIS_MODULE,
.type = NVMF_TRTYPE_FC,
@ -2943,6 +2975,7 @@ static const struct nvmet_fabrics_ops nvmet_fc_tgt_fcp_ops = {
.queue_response = nvmet_fc_fcp_nvme_cmd_done,
.delete_ctrl = nvmet_fc_delete_ctrl,
.discovery_chg = nvmet_fc_discovery_chg,
.host_traddr = nvmet_fc_host_traddr,
};
static int __init nvmet_fc_init_module(void)

4
include/linux/nvme-fc-driver.h
View File

@ -920,6 +920,9 @@ struct nvmet_fc_target_port {
* further references to hosthandle.
* Entrypoint is Mandatory if the lldd calls nvmet_fc_invalidate_host().
*
* @host_traddr: called by the transport to retrieve the node name and
* port name of the host port address.
*
* @max_hw_queues: indicates the maximum number of hw queues the LLDD
* supports for cpu affinitization.
* Value is Mandatory. Must be at least 1.
@ -975,6 +978,7 @@ struct nvmet_fc_target_template {
void (*ls_abort)(struct nvmet_fc_target_port *targetport,
void *hosthandle, struct nvmefc_ls_req *lsreq);
void (*host_release)(void *hosthandle);
int (*host_traddr)(void *hosthandle, u64 *wwnn, u64 *wwpn);
u32 max_hw_queues;
u16 max_sgl_segments;