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nvmet: add 'host_traddr' callback for debugfs

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We want to display the transport address of the connected host
in debugfs, but this is a property of the transport.
So add a callback 'host_traddr' to allow the transport drivers
to fill in the data.

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: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Hannes Reinecke 2024-05-27 07:15:20 +02:00 committed by Keith Busch
parent 649fd41420
commit 7e5c3de3f2
3 changed files with 31 additions and 0 deletions
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8
drivers/nvme/target/core.c
View File

@ -1542,6 +1542,14 @@ void nvmet_ctrl_fatal_error(struct nvmet_ctrl *ctrl)
} }
EXPORT_SYMBOL_GPL(nvmet_ctrl_fatal_error); EXPORT_SYMBOL_GPL(nvmet_ctrl_fatal_error);
ssize_t nvmet_ctrl_host_traddr(struct nvmet_ctrl *ctrl,
char *traddr, size_t traddr_len)
{
if (!ctrl->ops->host_traddr)
return -EOPNOTSUPP;
return ctrl->ops->host_traddr(ctrl, traddr, traddr_len);
}
static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port, static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port,
const char *subsysnqn) const char *subsysnqn)
{ {

19
drivers/nvme/target/debugfs.c
View File

@ -115,6 +115,23 @@ static ssize_t nvmet_ctrl_state_write(struct file *file, const char __user *buf,
} }
NVMET_DEBUGFS_RW_ATTR(nvmet_ctrl_state); NVMET_DEBUGFS_RW_ATTR(nvmet_ctrl_state);
static int nvmet_ctrl_host_traddr_show(struct seq_file *m, void *p)
{
struct nvmet_ctrl *ctrl = m->private;
ssize_t size;
char buf[NVMF_TRADDR_SIZE + 1];
size = nvmet_ctrl_host_traddr(ctrl, buf, NVMF_TRADDR_SIZE);
if (size < 0) {
buf[0] = '\0';
size = 0;
}
buf[size] = '\0';
seq_printf(m, "%s\n", buf);
return 0;
}
NVMET_DEBUGFS_ATTR(nvmet_ctrl_host_traddr);
int nvmet_debugfs_ctrl_setup(struct nvmet_ctrl *ctrl) int nvmet_debugfs_ctrl_setup(struct nvmet_ctrl *ctrl)
{ {
char name[32]; char name[32];
@ -138,6 +155,8 @@ int nvmet_debugfs_ctrl_setup(struct nvmet_ctrl *ctrl)
&nvmet_ctrl_kato_fops); &nvmet_ctrl_kato_fops);
debugfs_create_file("state", S_IRUSR | S_IWUSR, ctrl->debugfs_dir, ctrl, debugfs_create_file("state", S_IRUSR | S_IWUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_state_fops); &nvmet_ctrl_state_fops);
debugfs_create_file("host_traddr", S_IRUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_host_traddr_fops);
return 0; return 0;
} }

4
drivers/nvme/target/nvmet.h
View File

@ -354,6 +354,8 @@ struct nvmet_fabrics_ops {
void (*delete_ctrl)(struct nvmet_ctrl *ctrl); void (*delete_ctrl)(struct nvmet_ctrl *ctrl);
void (*disc_traddr)(struct nvmet_req *req, void (*disc_traddr)(struct nvmet_req *req,
struct nvmet_port *port, char *traddr); struct nvmet_port *port, char *traddr);
ssize_t (*host_traddr)(struct nvmet_ctrl *ctrl,
char *traddr, size_t traddr_len);
u16 (*install_queue)(struct nvmet_sq *nvme_sq); u16 (*install_queue)(struct nvmet_sq *nvme_sq);
void (*discovery_chg)(struct nvmet_port *port); void (*discovery_chg)(struct nvmet_port *port);
u8 (*get_mdts)(const struct nvmet_ctrl *ctrl); u8 (*get_mdts)(const struct nvmet_ctrl *ctrl);
@ -502,6 +504,8 @@ struct nvmet_ctrl *nvmet_ctrl_find_get(const char *subsysnqn,
struct nvmet_req *req); struct nvmet_req *req);
void nvmet_ctrl_put(struct nvmet_ctrl *ctrl); void nvmet_ctrl_put(struct nvmet_ctrl *ctrl);
u16 nvmet_check_ctrl_status(struct nvmet_req *req); u16 nvmet_check_ctrl_status(struct nvmet_req *req);
ssize_t nvmet_ctrl_host_traddr(struct nvmet_ctrl *ctrl,
char *traddr, size_t traddr_len);
struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn, struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
enum nvme_subsys_type type); enum nvme_subsys_type type);