STRUCT FW_CDEV_EVENT_COMMON(9)

💅 NAME

struct fw_cdev_event_common(9) — from the Kernel API Manual, bestie: this is literally the common part of all fw_cdev_event_* types. It's the shared little doorway for the generic bits, no matter which specific event type you're holding. ✨

🩷 SYNOPSIS

okay so the struct is giving:

struct fw_cdev_event_common {
    __u64 closure;
    __u32 type;
};

🧩 Members

• closure — For arbitrary use by userspace 💅 It's your little carry-on slot, no questions asked.
• type — Discriminates the fw_cdev_event_* types 👑 This is the label on the tin, iykyk.

🌸 Description

This struct may be used to access generic members of all fw_cdev_event_* types regardless of the specific type. So when you don't know or care which event flavor you're staring at, this is the common doorway. 🚪✨

Data passed in the closure field for a request will be returned in the corresponding event. Big main-character energy: you send it out, it comes back to you. 💖

It is big enough to hold a pointer on all platforms. No cap — pointer-sized on every platform, so your arbitrary little value can literally be a pointer if that's the vibe. 🫶

The ioctl used to set closure depends on the type of event. So yeah, which ioctl you use is not one-size-fits-all — do the vibe check on the event type, bestie. 🔍

👀 SEE ALSO

Kernel file ./include/uapi/linux/firewire-cdev.h and the whole sibling squad:

• struct fw_cdev_event_bus_reset(9)
• struct fw_cdev_event_response(9)
• struct fw_cdev_event_response2(9)
• struct fw_cdev_event_request(9)
• struct fw_cdev_event_request2(9)
• struct fw_cdev_event_request3(9)
• struct fw_cdev_event_iso_interrupt(9)
• struct fw_cdev_event_iso_interrupt_mc(9)
• struct fw_cdev_event_iso_resource(9)
• struct fw_cdev_event_phy_packet(9)
• struct fw_cdev_event_phy_packet2(9)
• union fw_cdev_event(9)
• struct fw_cdev_get_info(9)
• struct fw_cdev_send_request(9)
• struct fw_cdev_send_response(9)
• struct fw_cdev_allocate(9)
• struct fw_cdev_deallocate(9)
• struct fw_cdev_initiate_bus_reset(9)
• struct fw_cdev_add_descriptor(9)
• struct fw_cdev_remove_descriptor(9)
• struct fw_cdev_create_iso_context(9)
• struct fw_cdev_set_iso_channels(9)
• struct fw_cdev_iso_packet(9)
• struct fw_cdev_queue_iso(9)
• struct fw_cdev_start_iso(9)
• struct fw_cdev_stop_iso(9)
• struct fw_cdev_flush_iso(9)
• struct fw_cdev_get_cycle_timer(9)
• struct fw_cdev_get_cycle_timer2(9)
• struct fw_cdev_allocate_iso_resource(9)
• struct fw_cdev_send_stream_packet(9)
• struct fw_cdev_send_phy_packet(9)
• struct fw_cdev_receive_phy_packets(9)

okay that's the page, bestie — sourced from ./include/uapi/linux, dated October 2026, filed under struct fw_cdev_event_common(9). mwah 💋✨