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devlink: add device information API

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ethtool -i has served us well for a long time, but its showing
its limitations more and more. The device information should
also be reported per device not per-netdev.

Lay foundation for a simple devlink-based way of reading device
info. Add driver name and device serial number as initial pieces
of information exposed via this new API.

v3:
 - rename helpers (Jiri);
 - rename driver name attr (Jiri);
 - remove double spacing in commit message (Jiri).
RFC v2:
 - wrap the skb into an opaque structure (Jiri);
 - allow the serial number of be any length (Jiri & Andrew);
 - add driver name (Jonathan).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2019-01-31 10:50:40 -08:00
committed by David S. Miller
parent 26281e2c83
commit f9cf22882c
3 changed files with 135 additions and 0 deletions
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18
include/net/devlink.h
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@@ -429,6 +429,7 @@ enum devlink_param_wol_types {
}
struct devlink_region;
struct devlink_info_req;
typedef void devlink_snapshot_data_dest_t(const void *data);
@@ -484,6 +485,8 @@ struct devlink_ops {
int (*eswitch_encap_mode_get)(struct devlink *devlink, u8 *p_encap_mode);
int (*eswitch_encap_mode_set)(struct devlink *devlink, u8 encap_mode,
struct netlink_ext_ack *extack);
int (*info_get)(struct devlink *devlink, struct devlink_info_req *req,
struct netlink_ext_ack *extack);
};
static inline void *devlink_priv(struct devlink *devlink)
@@ -607,6 +610,10 @@ u32 devlink_region_shapshot_id_get(struct devlink *devlink);
int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
u8 *data, u32 snapshot_id,
devlink_snapshot_data_dest_t *data_destructor);
int devlink_info_serial_number_put(struct devlink_info_req *req,
const char *sn);
int devlink_info_driver_name_put(struct devlink_info_req *req,
const char *name);
#else
@@ -905,6 +912,17 @@ devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
return 0;
}
static inline int
devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
{
return 0;
}
static inline int
devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
{
return 0;
}
#endif
#endif /* _NET_DEVLINK_H_ */