STRUCT P9_SESSION_OPTS(9)

🦋 struct p9_session_opts(9) 🦋

okay bestie, so we're in the Kernel API Manual today and the vibe is very kernel-adjacent 💅. This is the page for struct p9_session_opts — the little glow-up container that holds all your parsed options before they get handed off to v9fs_session_info. Think of it as the fitting room, and v9fs_session_info is the outfit it eventually walks out in. iykyk ✨

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✨ NAME ✨

struct p9_session_opts — literally just holds the parsed options for v9fs_session_info. that's the whole job. no cap 🎀

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🌸 SYNOPSIS 🌸

struct p9_session_opts {
    unsigned int flags;
    unsigned char nodev;
    unsigned short debug;
    unsigned int afid;
    unsigned int cache;
    unsigned int ndentry_timeout_ms;
  #ifdef CONFIG_9P_FSCACHE;
    char *cachetag;
  #endif;
    char *uname;
    char *aname;
    kuid_t dfltuid;
    kgid_t dfltgid;
    kuid_t uid;
    long session_lock_timeout;
 };

look at her. all those fields. main character energy fr fr 👑

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🎀 Members 🎀

okay so let's go through the whole friend group one by one:

• flags — session options, and they're of type p9_session_flags ✨
• nodev — set this to 1 to disable device mapping. like, don't do the device thing. bye 👋
• debug — the debug level. how chatty do you want this to be 🗣️
• afid — the authentication handle 🫶
• cache — cache mode, of type p9_cache_bits 🧚
• ndentry_timeout_ms — negative dentry lookup cache retention time, in ms. yes it's a long name. she's worth it ⏱️
• cachetag — the tag of the cache associated with this session 🏷️
• uname — string user name, for which user to mount the hierarchy as 💜
• aname — mount specifier for the remote hierarchy 🌈
• dfltuid — default numeric userid to mount the hierarchy as 👑
• dfltgid — default numeric groupid to mount the hierarchy as 👑
• uid — ooh okay so if it's V9FS_ACCESS_SINGLE, this is the numeric uid that mounted the hierarchy. only that case, bestie ⭐
• session_lock_timeout — retry interval for blocking locks. patience is a virtue etc etc ⏳

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💖 Description 💖

so this structure holds the options that get parsed, and they will be transferred to the v9fs_session_info structure when mounted 🦋. which means it largely duplicates struct v9fs_session_info. yeah. it's giving "twins but one of them is temporary." iconic 🙈

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🔥 SEE ALSO 🔥

kernel file ./include/net/9p/client.h, plus the whole squad:

• enum p9_trans_status(9)
• enum p9_req_status_t(9)
• struct p9_req_t(9)
• struct p9_client(9)
• struct p9_fd_opts(9)
• struct p9_rdma_opts(9)
• struct p9_dirent(9)

go read those when you're done here, they're all lowkey obsessed with each other 💀

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and that's the page!! 🌸 mwah 💋. source lives at ./include/net/9p, dated October 2026, and yes she signs off as struct p9_session_opts(9) because she's that girl 🎀✨