validate_pnode(9)

💅 validate_pnode(9) — the Kernel API Manual, but make it make sense 🎀

okay bestie, welcome to the Kernel API Manual corner of the group chat ✨ today's main character is validate_pnode(9), and she's literally here to check that your pnode is valid. no cap. let's get into it 🫶

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✨ NAME ✨

validate_pnode — validate a pnode. that's it. that's the whole job. queen of minding her own business 💅

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🌸 SYNOPSIS 🌸

int validate_pnode (const struct ubifs_info *c , struct ubifs_pnode *pnode , struct ubifs_nnode *parent , int iip );

like, look at her. four arguments, returns an int, zero drama. iconic 👑

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🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object ✨ your whole context, your whole vibe, the main-character struct.
• pnode — the pnode to validate 🎀 yes bestie, that's the one we're checking. she's on the stand today.
• parent — parent nnode 🌸 the parental figure, keeping it all together. family tree energy fr fr.
• iip — index in parent 💜 her spot in the lineup. everybody's got a number, iykyk.

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💖 DESCRIPTION 💖

okay so here's the whole plot: this function returns 0 on success and a negative error code on failure. that's it. 0 means we ate and left no crumbs 🔥; negative means something went off and we're not pretending otherwise 😭

no hidden lore, no extra options, nothing sneaky. she validates, she reports, she leaves. periodt.

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🧚 SEE ALSO 🧚

the whole friend group 🫶 — sibling functions, cousins, the entire ./fs/ubifs/lpt.c family reunion:

• Kernel file ./fs/ubifs/lpt.c do_calc_lpt_geom(9)
• ubifs_calc_lpt_geom(9)
• calc_dflt_lpt_geom(9)
• pack_bits(9)
• ubifs_unpack_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)
• 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)

like, that's a whole contact list. she knows everybody 💀✨

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sign-off time 🌈 this lil page lives in ./fs/ubifs (source), and it's dated October 2026 — yes, the future, and she's still valid 🫶 go validate something, bestie. you're gonna slay 💖🎀🦋