dbg_check_inode_size(9)

💅 dbg_check_inode_size(9) ✨

okay so real talk — this is a page from the Kernel API Manual, and today's main character is dbg_check_inode_size. she's a little debug function with one job and she does it immaculately. no notes. 🎀

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🌸 NAME 🌸

dbg_check_inode_size — bestie, it literally just checks if the inode size is correct. that's the whole vibe check. 💖

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✨ SYNOPSIS ✨

int dbg_check_inode_size (struct ubifs_info *c , const struct inode
*inode , loff_t size );

like… she takes three things and gives you back an int. iconic behavior honestly. 🫶

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🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object. yes that's her whole personality, it's the fs context, we love her for it. ✨
• inode — the inode we're checking. the one on trial. 👑
• size — the inode size. the number we're judging everything against. 💅

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💜 DESCRIPTION 💜

okay so what this function does: it makes sure that the inode size (size) is correct, and it also confirms the inode does not have any pages beyond size. no sneaky extra pages hiding out past the end. none. not on her watch. 🙈

and here's the return situation, get into it:

• returns zero if the inode is OK — literally slaying, no cap ✅
• returns -EINVAL if it has a data page beyond size — ma'am that page does NOT belong there 😭
• returns other negative error code in case of other errors — generic ✨bad vibes✨, but at least she tells you

ngl the -EINVAL case is the dramatic one. a data page out past size? that's giving "someone left the fridge open". 🧚

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🔥 SEE ALSO 🔥

this list is long but we do not skip a single one, because every single one of these is part of the family. Kernel file ./fs/ubifs/tnc.c, plus:

• insert_old_idx(9)
• insert_old_idx_znode(9)
• ins_clr_old_idx_znode(9)
• destroy_old_idx(9)
• copy_znode(9)
• add_idx_dirt(9)
• replace_znode(9)
• dirty_cow_znode(9)
• lnc_add(9)
• lnc_free(9)
• tnc_read_hashed_node(9)
• try_read_node(9)
• fallible_read_node(9)
• matches_name(9)
• get_znode(9)
• tnc_next(9)
• tnc_prev(9)
• resolve_collision(9)
• fallible_matches_name(9)
• fallible_resolve_collision(9)
• matches_position(9)
• resolve_collision_directly(9)
• dirty_cow_bottom_up(9)
• ubifs_lookup_level0(9)
• lookup_level0_dirty(9)
• maybe_leb_gced(9)
• ubifs_tnc_locate(9)
• ubifs_tnc_get_bu_keys(9)
• read_wbuf(9)
• validate_data_node(9)
• ubifs_tnc_bulk_read(9)
• do_lookup_nm(9)
• ubifs_tnc_lookup_nm(9)
• ubifs_tnc_lookup_dh(9)
• correct_parent_keys(9)
• insert_zbranch(9)
• tnc_insert(9)
• ubifs_tnc_add(9)
• ubifs_tnc_replace(9)
• ubifs_tnc_add_nm(9)
• tnc_delete(9)
• ubifs_tnc_remove(9)
• ubifs_tnc_remove_nm(9)
• ubifs_tnc_remove_dh(9)
• key_in_range(9)
• ubifs_tnc_remove_range(9)
• ubifs_tnc_remove_ino(9)
• ubifs_tnc_next_ent(9)
• tnc_destroy_cnext(9)
• ubifs_tnc_close(9)
• left_znode(9)
• right_znode(9)
• lookup_znode(9)
• is_idx_node_in_tnc(9)
• is_leaf_node_in_tnc(9)
• ubifs_tnc_has_node(9)
• ubifs_dirty_idx_node(9)

like, the whole tnc.c friend group showed up. 💀💖

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aaand that's the page!! 🌈 shoutout to ./fs/ubifs and the October 2026 date stamp for making this official — mwah, love you, mean it. 🍓💜