STRUCT ETHNL_PERPHY_DUMP_CTX(9)

💅 struct ethnl_perphy_dump_ctx(9) 💅

okay so bestie, welcome to the Kernel API Manual, and buckle up because we're about to talk about a struct that is genuinely so niche and so specific and honestly kind of iconic for it 🎀

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✨ NAME ✨

struct ethnl_perphy_dump_ctx — the context for dumpit() PHY-aware callbacks. that's literally it. that's the whole vibe. lowkey a little guy that carries exactly what a PHY-aware dump callback needs to know 🦋

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🌸 SYNOPSIS 🌸

struct ethnl_perphy_dump_ctx {
    struct ethnl_dump_ctx   ethnl_ctx;
    unsigned int            ifindex;
    unsigned long           pos_phyindex;
};

like, look at her. three fields. no cap, she's compact and she knows it ✨

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👑 Members 👑

okay so the struct has exactly three members and we're gonna go through each one because every single one of them matters, periodt:

• ethnl_ctx — the generic ethnl context 🫶 not a special one, not a themed one, just the plain generic one. she's the base layer.
• ifindex — for Filtered DUMP requests, this is the ifindex of the targeted netdev 💖 so like, if you're filtering, this is which netdev you're pointing at. iykyk.
• pos_phyindex — the iterator position for multi-msg DUMP 🔥 this is the little counter that keeps track of where you are when a dump gets split across multiple messages. main character energy for real.

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🦋 SEE ALSO 🦋

go read these next, bestie, they're all in ./net/ethtool and they're all part of the same little friend group:

• netlink.c
• ethnl_parse_header_dev_get(9)
• ethnl_fill_reply_header(9)
• ethnl_reply_init(9)
• struct ethnl_dump_ctx(9)
• ethnl_default_parse(9)
• ethnl_init_reply_data(9)

ngl the naming convention here is giving "we ran out of ideas and just kept prefixing things with ethnl" and honestly? respect. 😭

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and that's the whole page, bestie!! this little number lives over in ./net/ethtool and was dated October 2026 — so yeah, technically from the future, we love a time-traveling manpage 💀✨ mwah, go read the SEE ALSOs, ily 🫶💜