STRUCT USB_DATA_STREAM(9)

💖 NAME 💖

okay so welcome to the Kernel API Manual page for struct usb_data_stream(9) — it's the generic object of an USB stream, and honestly it's giving “kernel struct with main character energy” ✨.

✨ SYNOPSIS ✨

bestie, here's the exact shape, no cap:

       struct usb_data_stream {
         #define MAX_NO_URBS_FOR_DATA_STREAM 10;
           struct usb_device                 *udev;
           struct usb_data_stream_properties  props;
         #define USB_STATE_INIT    0x00;
         #define USB_STATE_URB_BUF 0x01;
           int state;
           void (*complete) (struct usb_data_stream *, u8 *, size_t);
           struct urb    *urb_list[MAX_NO_URBS_FOR_DATA_STREAM];
           int buf_num;
           unsigned long  buf_size;
           u8 *buf_list[MAX_NO_URBS_FOR_DATA_STREAM];
           dma_addr_t dma_addr[MAX_NO_URBS_FOR_DATA_STREAM];
           int urbs_initialized;
           int urbs_submitted;
           void *user_priv;
        };

quick value check: MAX_NO_URBS_FOR_DATA_STREAM is 10, USB_STATE_INIT is 0x00, and USB_STATE_URB_BUF is 0x01 — all right there in the struct, periodt 💅.

🫶 Members 🫶

the members are the whole cast, and every single one matters:

• udev — the USB device. That's the main character device pointer.
• props — data stream properties. The vibe settings, basically.
• state — state of the stream. The synopsis also shows USB_STATE_INIT as 0x00 and USB_STATE_URB_BUF as 0x01.
• complete — complete callback; the synopsis types it as void (*complete) (struct usb_data_stream *, u8 *, size_t);.
• urb_list — list of URBs, shown as struct urb *urb_list[MAX_NO_URBS_FOR_DATA_STREAM];.
• buf_num — number of buffer allocated. (That's the original phrasing, bestie — we keep the lore.)
• buf_size — size of each buffer in buf_list.
• buf_list — array containing all allocate buffers for streaming. (Again: lore preserved.)
• dma_addr — list of dma_addr_t for each buffer in buf_list.
• urbs_initialized — number of URBs initialized.
• urbs_submitted — number of URBs submitted.
• user_priv — for private use. No questions, just private-use energy 🫶.

🔥 SEE ALSO 🔥

Kernel file ./drivers/media/usb/dvb-usb/dvb-usb.h struct — and then the whole squad:

• struct dvb_usb_device_description(9)
• struct dvb_usb_adapter_fe_properties(9)
• struct dvb_rc_legacy(9)
• struct dvb_rc(9)
• enum dvb_usb_mode(9)
• struct dvb_usb_device_properties(9)
• struct dvb_usb_fe_adapter(9)
• struct dvb_usb_adapter(9)
• struct dvb_usb_device(9)

cute sign-off: source/version ./drivers/media/usb/dvb-usb, date October 2026 — this is the struct usb_data_stream(9) page, and it ate, no crumbs. bye bestie 💅🫶