STRUCT VIRTCHNL2_SINGLEQ_BASE_RX_DESC(9)

💅 struct virtchnl2_singleq_base_rx_desc(9) — the kernel API manual, bestie edition ✨

Okay so, real talk: this is a page out of the Kernel API Manual, and the star of the show is struct virtchnl2_singleq_base_rx_desc — literally the RX descriptor writeback format. It's giving "the receipts your NIC hands back to you after a packet shows up" 🎀. Come sit with me, we're gonna go through every single field, no skipping, periodt.

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✨ NAME ✨

struct virtchnl2_singleq_base_rx_desc — the RX descriptor writeback format. That's it, that's the vibe 💖.

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🌸 SYNOPSIS 🌸

Here's the whole struct, character for character, so you can copy it straight into your notes:

struct virtchnl2_singleq_base_rx_desc {
    struct {
      struct {
        __le16 mirroring_status;
        __le16 l2tag1;
      } lo_dword;
      union {
        __le32 rss;
        __le32 fd_id;
      } hi_dword;
    } qword0;
    struct {
      __le64 status_error_ptype_len;
    } qword1;
    struct {
      __le16 ext_status;
      __le16 rsvd;
      __le16 l2tag2_1;
      __le16 l2tag2_2;
    } qword2;
    struct {
      __le32 reserved;
      __le32 fd_id;
    } qword3;
};

Like, look at it. Four quad words. Nested structs inside nested structs. A union doing union things. It's a whole little ecosystem 🦋.

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👑 Members 👑

Bestie, we're going field by field, and yes, we're doing all of them. Grab a snack 🍓.

• qword0 — the first quad word struct. The opening act, the main character of the first eight bytes ✨.
  • qword0.lo_dword — the lower dual word struct, sitting all cozy in the bottom half.
    • qword0.lo_dword.mirroring_status — the mirrored packet status 🪞.
    • qword0.lo_dword.l2tag1 — the stripped L2 tag from the received packet. It got extracted, bestie, it's free now 🎀.
  • qword0.hi_dword — the high dual word union. It's a union, so it's gonna be one of these two, iykyk 👀.
    • qword0.hi_dword.rss — the RSS hash 🔥.
    • qword0.hi_dword.fd_id — the flow director filter id.
• qword1 — the second quad word struct. We love a consistent naming scheme 💜.
  • qword1.status_error_ptype_len — status/error/PTYPE/length. Yes, all four at once, it's an overachiever, it's giving multitasking queen 👑.
• qword2 — the third quad word struct. Still slaying, still quad, still word 💅.
  • qword2.ext_status — the extended status.
  • qword2.rsvd — reserved. Not for you, bestie, hands off 🙈.
  • qword2.l2tag2_1 — extracted L2 tag 2 from the packet.
  • qword2.l2tag2_2 — reserved. Also not for you 🫶.
• qword3 — the fourth quad word struct. The finale, the closing number 🌈.
  • qword3.reserved — reserved. Again. Stay out of it, it's private ✨.
  • qword3.fd_id — the flow director filter id. (Yep, this name shows up in qword0.hi_dword too — that's exactly what the page says, we don't merge, we don't edit 💖.)

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🧚 Description 🧚

Profile ID 0x1, SingleQ, base writeback format. That's the whole description, and honestly? It ate. Short, iconic, no notes 🌸.

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⭐ SEE ALSO ⭐

Go read these next, bestie, they're the friend group:

• Kernel file ./include/linux/net/intel/virtchnl2_lan_desc.h struct virtchnl2_splitq_rx_buf_desc(9)
• struct virtchnl2_singleq_rx_buf_desc(9)
• struct virtchnl2_rx_flex_desc_nic(9)
• struct virtchnl2_rx_flex_desc_adv_nic_3(9)

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Heads up, bestie: every rsvd and reserved field in here is exactly that — reserved. Don't go claiming those bytes for your own schemes, they are not yours 💀.

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Mwah 💋 — that's the whole page, and here's your cute little sign-off: this one lives under the kernel path ./include/linux/net/intel, dated October 2026, in the struct virt...base_rx_desc(9) era of the manual. Go forth and parse descriptors, you gorgeous nerd 🦋💜🎀