STRUCT FW_CDEV_FLUSH_ISO(9)

✨ struct fw_cdev_flush_iso(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this one's about struct fw_cdev_flush_iso and honestly it's giving "small but mighty" — one field, big main character energy 👑

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🌸 NAME 🌸

struct fw_cdev_flush_iso — flush completed iso packets 🦋

like, it's literally the "hey, anything done yet?" struct, and we love her for it

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🎀 SYNOPSIS 🎀

struct fw_cdev_flush_iso {
    __u32 handle;
 };

yes that's the whole thing. that's the post. 💅

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🧚 Members 🧚

• handle — the handle of the isochronous context you wanna flush, iykyk 🫶

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💜 Description 💜

okay so here's the vibe check on what actually happens when you use this 👀

For FW_CDEV_ISO_CONTEXT_TRANSMIT or FW_CDEV_ISO_CONTEXT_RECEIVE contexts, it reports any completed packets. simple. iconic. no cap. ✨

For FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL contexts, it reports the current offset in the receive buffer — but only if it has changed. and ngl, this is typically in the middle of some buffer chunk. like, mid-chunk. living on the edge fr fr 🌀

Any FW_CDEV_EVENT_ISO_INTERRUPT or FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL events generated by this ioctl are sent synchronously, i.e., are available for reading from the file descriptor when this ioctl returns. ⭐

that last bit is highkey the important part — the events are already there by the time this ioctl comes back, so you can read them straight off the file descriptor, no waiting around, no "let me check back later" 💀

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🌈 SEE ALSO 🌈

bestie, the whole friend group is here, and we're listing every single one because everyone gets their moment 🥹💖

Kernel file ./include/uapi/linux/firewire-cdev.h struct fw_cdev_event_common(9), 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_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)

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🎀 that's the whole page bestie, go flush those packets, you're gonna slay 🎀

mwah 💋

— sourced fresh from ./include/uapi/linux, dated October 2026, page title struct fw_cdev_flush_iso(9), and that's the sign-off 🫶✨🌸