STRUCT DEVLINK_PARAM(9)

💅 struct devlink_param(9) 💅

okay bestie, welcome to the Kernel API Manual page for struct devlink_param — this is the little data bundle that tells devlink all about one configuration parameter. no cap, it's giving "driver paperwork but make it iconic." 💖

💖 NAME 💖

struct devlink_param — devlink configuration parameter data ✨

✨ SYNOPSIS ✨

       struct devlink_param {
           u32 id;
           const char *name;
           bool generic;
           enum devlink_param_type type;
           unsigned long supported_cmodes;
           int (*get)(struct devlink *devlink, u32 id, struct
       devlink_param_gset_ctx *ctx, struct netlink_ext_ack *extack);
           int (*set)(struct devlink *devlink, u32 id, struct
       devlink_param_gset_ctx *ctx, struct netlink_ext_ack *extack);
           int (*validate)(struct devlink *devlink, u32 id, union
       devlink_param_value *val, struct netlink_ext_ack *extack);
           int (*get_default)(struct devlink *devlink, u32 id, struct
       devlink_param_gset_ctx *ctx, struct netlink_ext_ack *extack);
           int (*reset_default)(struct devlink *devlink, u32 id, enum
       devlink_param_cmode cmode, struct netlink_ext_ack *extack);
        };

🫶 Members 🫶

• id — devlink parameter id number 🆔
• name — name of the parameter 🏷️
• generic — indicates if the parameter is generic or driver specific 👀
• type — parameter type 🧬
• supported_cmodes — bitmap of supported configuration modes 🗺️
• get — get parameter value, used for runtime and permanent configuration modes 🎣
• set — set parameter value, used for runtime and permanent configuration modes 🛠️
• validate — validate input value is applicable (within value range, etc.) ✅
• get_default — get parameter default value, used for runtime and permanent configuration modes 🌱
• reset_default — reset parameter to default value, used for runtime and permanent configuration modes 🔄

🌸 Description 🌸

so this struct is literally what the driver uses to fill in the data for a parameter it registers. that's the whole vibe. the driver fills it out, the parameter gets registered, and everyone moves on with their day. 🫶

🌈 SEE ALSO 🌈

Kernel file ./include/net/devlink.h — and then the whole devlink family reunion:

• struct devlink_port_pci_pf_attrs(9)
• struct devlink_port_pci_vf_attrs(9)
• struct devlink_port_pci_sf_attrs(9)
• struct devlink_port_attrs(9)
• struct devlink_linecard_ops(9)
• struct devlink_dpipe_field(9)
• struct devlink_dpipe_header(9)
• struct devlink_dpipe_match(9)
• struct devlink_dpipe_action(9)
• struct devlink_dpipe_value(9)
• struct devlink_dpipe_entry(9)
• struct devlink_dpipe_dump_ctx(9)
• struct devlink_dpipe_table(9)
• struct devlink_dpipe_table_ops(9)
• struct devlink_dpipe_headers(9)
• struct devlink_resource_size_params(9)
• struct devlink_flash_notify(9)
• struct devlink_flash_update_params(9)
• struct devlink_region_ops(9)
• struct devlink_port_region_ops(9)
• struct devlink_health_reporter_ops(9)
• struct devlink_trap_metadata(9)
• struct devlink_trap_policer(9)
• struct devlink_trap_group(9)
• struct devlink_trap(9)
• struct devlink_port_ops(9)

source/version: ./include/net · date: October 2026 · title: struct devlink_param(9) · manual: Kernel API Manual — mwah, go register those parameters responsibly 💋✨