ubifs_unpack_bits(9)

🦋 ubifs_unpack_bits(9) — the Kernel API Manual girlies' edition 🦋

okay so bestie, welcome to ubifs_unpack_bits from the Kernel API Manual — yes that Kernel API Manual, the one with all the ubifs lore. this function is literally the glow-up partner of pack_bits(9), and she's here to pull bit fields back out of a buffer. iykyk 💅

---

✨ NAME ✨

ubifs_unpack_bits — unpack bit fields. that's it, that's the vibe. 🎀

---

🌸 SYNOPSIS 🌸

uint32_t ubifs_unpack_bits (const struct ubifs_info *c , uint8_t **addr
, int *pos , int nrbits );

copy it exactly bestie, don't improvise 😭

---

💖 ARGUMENTS 💖

• c — the UBIFS file-system description object. she's the context, the main character, the whole personality of the call 🫶
• addr — address at which to unpack. it gets passed in and the next address comes back out on the way home, so she's doing double duty ✨
• pos — bit position at which to unpack. same deal: passed in, and the next position gets returned. very "you'll get her back, slightly moved" energy 💫
• nrbits — number of bits of value to unpack, and the range is 1-32. don't go outside it, that's the rule, no cap 🔥

---

🌈 DESCRIPTION 🌈

This function returns the value unpacked. literally that's the whole thing — she unpacks the bits and hands you the value. iconic behaviour, ate and left no crumbs 👑

---

🧚 SEE ALSO 🧚

the whole friend group, from the Kernel file ./fs/ubifs/lpt.c. all of them. not a single one skipped, because we don't do that here 💜

• do_calc_lpt_geom(9)
• ubifs_calc_lpt_geom(9)
• calc_dflt_lpt_geom(9)
• pack_bits(9)
• ubifs_pack_pnode(9)
• ubifs_pack_nnode(9)
• ubifs_pack_ltab(9)
• ubifs_pack_lsave(9)
• ubifs_add_lpt_dirt(9)
• set_ltab(9)
• ubifs_add_nnode_dirt(9)
• add_pnode_dirt(9)
• calc_nnode_num(9)
• calc_nnode_num_from_parent(9)
• calc_pnode_num_from_parent(9)
• ubifs_create_dflt_lpt(9)
• update_cats(9)
• replace_cats(9)
• check_lpt_crc(9)
• check_lpt_type(9)
• unpack_pnode(9)
• ubifs_unpack_nnode(9)
• unpack_ltab(9)
• unpack_lsave(9)
• validate_nnode(9)
• validate_pnode(9)
• set_pnode_lnum(9)
• ubifs_read_nnode(9)
• read_pnode(9)
• read_ltab(9)
• read_lsave(9)
• ubifs_get_nnode(9)
• ubifs_get_pnode(9)
• ubifs_pnode_lookup(9)
• ubifs_lpt_lookup(9)
• dirty_cow_nnode(9)
• dirty_cow_pnode(9)
• ubifs_lpt_lookup_dirty(9)
• ubifs_lpt_calc_hash(9)
• lpt_check_hash(9)
• lpt_init_rd(9)
• lpt_init_wr(9)
• ubifs_lpt_init(9)
• struct lpt_scan_node(9)
• scan_get_nnode(9)
• scan_get_pnode(9)
• ubifs_lpt_scan_nolock(9)
• dbg_chk_pnode(9)
• dbg_check_lpt_nodes(9)

---

ok that's a lot of links but like, it's a scene, bestie. go read them. you'll be obsessed 🌸

---

and that's the page!! source is ./fs/ubifs, version date is October 2026, and it's all filed under ubifs_unpack_bits(9). mwah, go unpack some bits, slay 💋💖🎀