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RDMA/core: Introduce "name_assign_type" for an IB device

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The name_assign_type indicates how the name is provided. Currently
these types are supported:
- RDMA_NAME_ASSIGN_TYPE_UNKNOWN: Unknown or not set;
- RDMA_NAME_ASSIGN_TYPE_USER: Name is provided by the user; The
  user-created sub device, rxe and siw device has this type.

When filling nl device info, it is set in the new attribute
RDMA_NLDEV_ATTR_NAME_ASSIGN_TYPE. User-space tools like udev
"rdma_rename" could check this attribute to determine if this
device needs to be renamed or not.

Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/522591bef9a369cc8e5dcb77787e017bffee37fe.1719837610.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Mark Zhang 2024-07-01 15:40:48 +03:00 committed by Leon Romanovsky
parent f802078d3c
commit af48f95492
6 changed files with 27 additions and 2 deletions
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5
drivers/infiniband/core/nldev.c
View File

@ -169,6 +169,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_DRIVER_DETAILS] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_DEV_TYPE] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_PARENT_NAME] = { .type = NLA_NUL_STRING },
[RDMA_NLDEV_ATTR_NAME_ASSIGN_TYPE] = { .type = NLA_U8 },
};
static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
@ -312,6 +313,10 @@ static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
dev_name(&device->parent->dev)))
return -EMSGSIZE;
if (nla_put_u8(msg, RDMA_NLDEV_ATTR_NAME_ASSIGN_TYPE,
device->name_assign_type))
return -EMSGSIZE;
/*
* Link type is determined on first port and mlx4 device
* which can potentially have two different link type for the same

5
drivers/infiniband/hw/mlx5/main.c
View File

@ -4198,9 +4198,10 @@ static int mlx5_ib_stage_ib_reg_init(struct mlx5_ib_dev *dev)
{
const char *name;
if (dev->sub_dev_name)
if (dev->sub_dev_name) {
name = dev->sub_dev_name;
else if (!mlx5_lag_is_active(dev->mdev))
ib_mark_name_assigned_by_user(&dev->ib_dev);
} else if (!mlx5_lag_is_active(dev->mdev))
name = "mlx5_%d";
else
name = "mlx5_bond_%d";

1
drivers/infiniband/sw/rxe/rxe_net.c
View File

@ -537,6 +537,7 @@ int rxe_net_add(const char *ibdev_name, struct net_device *ndev)
return -ENOMEM;
rxe->ndev = ndev;
ib_mark_name_assigned_by_user(&rxe->ib_dev);
err = rxe_add(rxe, ndev->mtu, ibdev_name);
if (err) {

1
drivers/infiniband/sw/siw/siw_main.c
View File

@ -485,6 +485,7 @@ static int siw_newlink(const char *basedev_name, struct net_device *netdev)
else
sdev->state = IB_PORT_DOWN;
ib_mark_name_assigned_by_user(&sdev->base_dev);
rv = siw_device_register(sdev, basedev_name);
if (rv)
ib_dealloc_device(&sdev->base_dev);

8
include/rdma/ib_verbs.h
View File

@ -2794,6 +2794,8 @@ struct ib_device {
enum rdma_nl_dev_type type;
struct ib_device *parent;
struct list_head subdev_list;
enum rdma_nl_name_assign_type name_assign_type;
};
static inline void *rdma_zalloc_obj(struct ib_device *dev, size_t size,
@ -4867,4 +4869,10 @@ int ib_add_sub_device(struct ib_device *parent,
* Return 0 on success, an error code otherwise
*/
int ib_del_sub_device_and_put(struct ib_device *sub);
static inline void ib_mark_name_assigned_by_user(struct ib_device *ibdev)
{
ibdev->name_assign_type = RDMA_NAME_ASSIGN_TYPE_USER;
}
#endif /* IB_VERBS_H */

9
include/uapi/rdma/rdma_netlink.h
View File

@ -572,6 +572,8 @@ enum rdma_nldev_attr {
RDMA_NLDEV_ATTR_PARENT_NAME, /* string */
RDMA_NLDEV_ATTR_NAME_ASSIGN_TYPE, /* u8 */
/*
* Always the end
*/
@ -615,4 +617,11 @@ enum rdma_nl_counter_mask {
enum rdma_nl_dev_type {
RDMA_DEVICE_TYPE_SMI = 1,
};
/* RDMA device name assignment types */
enum rdma_nl_name_assign_type {
RDMA_NAME_ASSIGN_TYPE_UNKNOWN = 0,
RDMA_NAME_ASSIGN_TYPE_USER = 1, /* Provided by user-space */
};
#endif /* _UAPI_RDMA_NETLINK_H */