is_a_node(9)

💅 is_a_node(9) — like, the Kernel API Manual page, bestie ✨

okay so real talk: this is a page from the Kernel API Manual (that's the (9) bit, iykyk) and it's about one tiny little function that does one tiny little thing. but honestly? it's giving gatekeeper-of-the-whole-node-vibe and we're obsessed 🎀

---

🌸 NAME 🌸

is_a_node — literally just determines if a buffer contains a node. that's it. that's the whole job. 💅

---

✨ SYNOPSIS ✨

int is_a_node (const struct ubifs_info *c , uint8_t *buf , int len );

like, look at her go 🫶

---

🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object. yes bestie, the whole filesystem's lore in one struct 💖
• buf — a buffer. just a buffer. iconic, no notes 🌈
• len — the length of that buffer. gotta know how much buffer you're buffering ⭐

---

👑 DESCRIPTION 👑

so here's the tea 🔥: this function returns 1 if the buffer contains a node, or 0 if it does not. that's literally it, no cap. binary queen. she ate and left no crumbs 💀✨

---

💜 SEE ALSO 💜

the Kernel file ./fs/ubifs/lpt_commit.c — that's the main character energy right there 👑

and then, like, the entire extended friend group (all of these are (9) pages, fr fr):

• first_dirty_cnode(9)
• next_dirty_cnode(9)
• get_cnodes_to_commit(9)
• upd_ltab(9)
• alloc_lpt_leb(9)
• layout_cnodes(9)
• realloc_lpt_leb(9)
• write_cnodes(9)
• next_pnode_to_dirty(9)
• add_pnode_dirt(9)
• do_make_pnode_dirty(9)
• make_tree_dirty(9)
• need_write_all(9)
• lpt_tgc_start(9)
• lpt_tgc_end(9)
• populate_lsave(9)
• nnode_lookup(9)
• make_nnode_dirty(9)
• make_pnode_dirty(9)
• make_ltab_dirty(9)
• make_lsave_dirty(9)
• make_node_dirty(9)
• get_lpt_node_len(9)
• get_pad_len(9)
• get_lpt_node_type(9)
• lpt_gc_lnum(9)
• lpt_gc(9)
• ubifs_lpt_start_commit(9)
• free_obsolete_cnodes(9)
• ubifs_lpt_end_commit(9)
• ubifs_lpt_post_commit(9)
• first_nnode(9)
• next_nnode(9)
• ubifs_lpt_free(9)
• dbg_is_all_ff(9)
• dbg_is_nnode_dirty(9)
• dbg_is_pnode_dirty(9)
• dbg_is_ltab_dirty(9)
• dbg_is_lsave_dirty(9)
• dbg_is_node_dirty(9)
• dbg_check_ltab_lnum(9)
• dbg_check_ltab(9)
• dbg_chk_lpt_free_spc(9)
• dbg_chk_lpt_sz(9)
• dump_lpt_leb(9)
• ubifs_dump_lpt_lebs(9)
• dbg_populate_lsave(9)

like okayyy uh huh, that's a whole contact list 📋💅

---

ngl bestie, this page is short but she's still valid. go read the friend group if you want the full lore 🧚‍♀️

---

and that's a wrap, babes 🍓 this little slice of the Kernel API Manual comes to you from ./fs/ubifs, dated October 2026 — mwah, see you in the next page 💖💅✨