ENUM P9_DEBUG_FLAGS(9)

🎀 enum p9_debug_flags(9) 🎀

okay bestie, welcome to the Kernel API Manual — yes, we're doing kernel lore today and honestly? it's giving study date energy 💅

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✨ NAME ✨

enum p9_debug_flags — literally just the bits for the mount time debug parameter 🫶

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🌸 SYNOPSIS 🌸

enum p9_debug_flags {
    P9_DEBUG_ERROR ,
    P9_DEBUG_9P ,
    P9_DEBUG_VFS ,
    P9_DEBUG_CONV ,
    P9_DEBUG_MUX ,
    P9_DEBUG_TRANS ,
    P9_DEBUG_SLABS ,
    P9_DEBUG_FCALL ,
    P9_DEBUG_FID ,
    P9_DEBUG_PKT ,
    P9_DEBUG_FSC ,
    P9_DEBUG_VPKT ,
    P9_DEBUG_CACHE ,
    P9_DEBUG_MMAP

};

no cap, that's the whole roster 🌈

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🦋 Constants 🦋

so these are your little flag besties, one per vibe — memorize them and you're the main character of the mount options:

• P9_DEBUG_ERROR — more verbose error messages, and it includes the original error string 💀 (so you actually know what went wrong, iconic)
• P9_DEBUG_9P — 9P protocol tracing ⭐
• P9_DEBUG_VFS — VFS API tracing 🌸
• P9_DEBUG_CONV — protocol conversion tracing 💜
• P9_DEBUG_MUX — traces the management of concurrent transactions 🧚
• P9_DEBUG_TRANS — transport tracing 🚀
• P9_DEBUG_SLABS — memory management tracing 🍓
• P9_DEBUG_FCALL — verbose dump of protocol messages 🔥 (a whole meal, honestly)
• P9_DEBUG_FID — fid allocation/deallocation tracking 👑
• P9_DEBUG_PKT — packet marshalling/unmarshalling 🎀
• P9_DEBUG_FSC — FS-cache tracing 🦋
• P9_DEBUG_VPKT — Verbose packet debugging (full packet dump) 😭 (yes, full — she does not hold back)
• P9_DEBUG_CACHE — cache operations tracing ⭐
• P9_DEBUG_MMAP — memory-mapped I/O tracing 💖

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💜 Description 💜

so here's the tea: these flags get passed at mount time to turn on various levels of verbosity and tracing, and all of that output goes to the system logs 🫶

like, that's it — you flip the bits, the kernel gets chatty, you read the logs. slay.

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🌈 SEE ALSO 🌈

go read these next, bestie, they're all in the kernel file ./include/net/9p/9p.h:

• enum p9_msg_t(9)
• enum p9_open_mode_t(9)
• enum p9_perm_t(9)
• enum p9_qid_t(9)
• struct p9_qid(9)
• struct p9_wstat(9)
• struct p9_iattr_dotl(9)
• struct p9_fcall(9)

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mwah 💋 that's the whole page — brought to you by ./include/net/9p, dated October 2026, and stamped enum p9_debug_flags(9) at the bottom like a little signature. go trace something, queen 👑✨