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nvmet: register discovery subsystem as 'current' 

Register the discovery subsystem as the 'current' discovery subsystem,
and add a new discovery log page entry for it.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke 2021-10-18 17:21:38 +02:00 committed by Christoph Hellwig
parent 598e75934c
commit 2953b30b1d
2 changed files with 12 additions and 6 deletions
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1
drivers/nvme/target/core.c
View File

@ -1541,6 +1541,7 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
subsys->max_qid = NVMET_NR_QUEUES;
break;
case NVME_NQN_DISC:
case NVME_NQN_CURR:
subsys->max_qid = 0;
break;
default:

17
drivers/nvme/target/discovery.c
View File

@ -146,7 +146,7 @@ static size_t discovery_log_entries(struct nvmet_req *req)
struct nvmet_ctrl *ctrl = req->sq->ctrl;
struct nvmet_subsys_link *p;
struct nvmet_port *r;
size_t entries = 0;
size_t entries = 1;
list_for_each_entry(p, &req->port->subsystems, entry) {
if (!nvmet_host_allowed(p->subsys, ctrl->hostnqn))
@ -171,6 +171,7 @@ static void nvmet_execute_disc_get_log_page(struct nvmet_req *req)
u32 numrec = 0;
u16 status = 0;
void *buffer;
char traddr[NVMF_TRADDR_SIZE];
if (!nvmet_check_transfer_len(req, data_len))
return;
@ -203,15 +204,19 @@ static void nvmet_execute_disc_get_log_page(struct nvmet_req *req)
status = NVME_SC_INTERNAL;
goto out;
}
hdr = buffer;
list_for_each_entry(p, &req->port->subsystems, entry) {
char traddr[NVMF_TRADDR_SIZE];
nvmet_set_disc_traddr(req, req->port, traddr);
nvmet_format_discovery_entry(hdr, req->port,
nvmet_disc_subsys->subsysnqn,
traddr, NVME_NQN_CURR, numrec);
numrec++;
list_for_each_entry(p, &req->port->subsystems, entry) {
if (!nvmet_host_allowed(p->subsys, ctrl->hostnqn))
continue;
nvmet_set_disc_traddr(req, req->port, traddr);
nvmet_format_discovery_entry(hdr, req->port,
p->subsys->subsysnqn, traddr,
NVME_NQN_NVME, numrec);
@ -389,7 +394,7 @@ u16 nvmet_parse_discovery_cmd(struct nvmet_req *req)
int __init nvmet_init_discovery(void)
{
nvmet_disc_subsys =
nvmet_subsys_alloc(NVME_DISC_SUBSYS_NAME, NVME_NQN_DISC);
nvmet_subsys_alloc(NVME_DISC_SUBSYS_NAME, NVME_NQN_CURR);
return PTR_ERR_OR_ZERO(nvmet_disc_subsys);
}