aa_get_data_from_compressed(9)

💅 aa_get_data_from_compressed

okay bestie, welcome to the Kernel API Manual entry for aa_get_data_from_compressed — and no, that's not a mouthful, that's just what happens when a function has main character energy 💖

---

✨ NAME ✨

aa_get_data_from_compressed — the common routine for getting compressed policy from user, and for getting both the compressed and the uncompressed version. like, both. at once. overachiever behavior fr fr 🫶

---

🦋 SYNOPSIS 🦋

struct aa_loaddata * aa_get_data_from_compressed (const char __user
*userbuf , size_t buffer_size , loff_t *pos , char **compressed_data );

---

🎀 ARGUMENTS 🎀

• userbuf — the user buffer you're copying data from. it is NOT NULL, so do not come in here with a NULL, that's not the vibe 🙈
• buffer_size — size of the user buffer. literally just how big it is 💫
• pos — the position the write is at in the file. also NOT NULL, same energy, no NULLs allowed 👑
• compressed_data — a pointer to the compressed data; *compressed_data is allocated right there for you. it's giving free real estate ✨

---

🔥 RETURN 🔥

a kernel buffer containing the copy of the user buffer data — or an ERR_PTR on failure 😭 (iykyk, check that pointer)

---

🌈 SEE ALSO 🌈

the Kernel file ./security/apparmor/apparmorfs.c, plus the whole friend group:

• mangle_name(9)
• __aafs_setup_d_inode(9)
• aafs_create(9)
• aafs_create_file(9)
• aafs_create_dir(9)
• aafs_remove(9)
• aa_simple_write_to_buffer(9)
• query_data(9)
• query_label(9)
• aa_write_access(9)
• __next_ns(9)
• __first_profile(9)
• __next_profile(9)
• next_profile(9)
• p_start(9)
• p_next(9)
• p_stop(9)
• seq_show_profile(9)
• entry_create_file(9)
• entry_create_dir(9)
• entry_remove_file(9)
• entry_remove_dir(9)
• aa_destroy_aafs(9)
• aa_create_aafs(9)

---

ngl, that see-also list is a whole squad 🫶 go read them, they ate 💅

---

and that's the page, bestie! brought to you by the fine folks over in ./security/apparmor, dated October 2026, and of course the star of the show herself, aa_get_data_from_compressed(9) 💜🎀 see you in the next manpage, mwah! 🌸