crypto_alloc_acomp(9)

🎀 crypto_alloc_acomp(9) 🎀

okay bestie, welcome to the Kernel API Manual — this is the page for crypto_alloc_acomp, and it's literally about getting you a compression handle. let's go 💅

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✨ NAME ✨

crypto_alloc_acomp — allocate ACOMPRESS tfm handle 🦋

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✨ SYNOPSIS ✨

struct crypto_acomp * crypto_alloc_acomp (const char *alg_name , u32 type , u32 mask );

like, that's the whole call. one function, three args, no cap.

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✨ ARGUMENTS ✨

• alg_name — this is the cra_name / name or the cra_driver_name / driver name of the compression algorithm, e.g. "deflate". basically you're telling the kernel which algorithm you want 🍓
• type — specifies the type of the algorithm. yes queen, the type.
• mask — specifies the mask for the algorithm. and the mask. they're a lil duo 💜

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✨ DESCRIPTION ✨

So what does it actually do? It allocates a handle for a compression algorithm 🔥

The returned struct crypto_acomp is the handle — and it's required for any subsequent API invocation for the compression operations. so like, no handle = no compression, that's just the vibe check ✨

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✨ RETURN ✨

• On success? you get the allocated handle 😌👑
• On error? IS_ERR is true, and PTR_ERR returns the error code. so check your errors, bestie, don't be out here dereferencing a bad pointer 😭💀

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🌈 SEE ALSO 🌈

okay this list is long, but every single one of these is iconic in its own right:

• Kernel file ./include/crypto/acompress.h
• struct acomp_req(9)
• struct crypto_acomp(9)
• Asynchronous Compression API(9)
• crypto_alloc_acomp_node(9)
• crypto_free_acomp(9)
• acomp_request_alloc_extra(9)
• acomp_request_alloc_extra(9) — yes, it's listed twice in the original. not me questioning it, iykyk 🙈
• acomp_request_free(9)
• acomp_request_set_callback(9)
• acomp_request_set_params(9)
• acomp_request_set_src_sg(9)
• acomp_request_set_src_dma(9)
• acomp_request_set_src_nondma(9)
• acomp_request_set_src_folio(9)
• acomp_request_set_dst_sg(9)
• acomp_request_set_dst_dma(9)
• acomp_request_set_dst_nondma(9)
• acomp_request_set_dst_folio(9)
• crypto_acomp_compress(9)
• crypto_acomp_decompress(9)

go read them. all of them. main character reading list fr fr 📚✨

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and that's the page! this lil beauty lives in ./include/crypto, and it's dated October 2026 — so yeah, she's from the future 💫 slay, and remember: allocate responsibly 🫶💖