STRUCT NETLBL_LSM_CACHE(9)

🎀 struct netlbl_lsm_cache(9) 🎀

okay bestie, welcome to the Kernel API Manual — this one's a struct page, and it's honestly giving "small but mighty" ✨

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✨ NAME ✨

struct netlbl_lsm_cache — the NetLabel LSM security attribute cache, aka the little struct that remembers stuff so your LSM doesn't have to keep doing the same math over and over 💅

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🌸 SYNOPSIS 🌸

struct netlbl_lsm_cache {
    refcount_t refcount;
    void (*free) (const void *data);
    void *data;
 };

like... look at her. three fields. impeccable. no notes. 🫶

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🦋 Members 🦋

• refcount — an atomic reference counter, fr fr. it's counting refs, atomically, the way it should. ⭐
• free — a function pointer that the LSM supplies, and its whole job is to free the cache data. void (*free) (const void *data); — yes bestie, you bring your own cleanup. 🧹
• data — the LSM supplied cache data. it's a void *, so it could literally be anything, and honestly? main character energy. 🫶

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💖 Description 💖

so this struct exists for LSMs that want to use the NetLabel caching mechanism to stash LSM specific data/attributes in the NetLabel cache. that's it, that's the vibe. ✨

here's the situation where you'd care: if your LSM has to perform, like, a lot of translation from the NetLabel security attributes into its own internal representation, then the cache mechanism can give you a way to eliminate some or all of that translation overhead on a cache hit. 🎯

read that again, bestie: on a cache hit. the whole flex is that hits get cheaper. lowkey iconic. 🔥

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👑 SEE ALSO 👑

• Kernel file ./include/net/netlabel.h struct netlbl_lsm_secattr(9)
• struct netlbl_calipso_ops(9)
• netlbl_secattr_cache_alloc(9)
• netlbl_secattr_cache_free(9)
• netlbl_catmap_alloc(9)
• netlbl_catmap_free(9)
• netlbl_secattr_init(9)
• netlbl_secattr_destroy(9)
• netlbl_secattr_alloc(9)
• netlbl_secattr_free(9)

no gatekeeping here, go read all of them, iykyk 💜

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ngl, this page has zero warnings, zero bugs, and zero drama. it's just a chill little struct doing its job. we love a stable queen. 🌈

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and that's the whole page, bestie! 🍓 this came to you from ./include/net in the Kernel API Manual, dated October 2026 — struct netlbl_lsm_cache(9), signing off 💅🎀🌟