STRUCT UBIFS_TRUN_NODE(9)

🦋 struct ubifs_trun_node(9) 🦋

okay so this one is straight from the Kernel API Manual, and it's giving truncation node realness — struct ubifs_trun_node, no cap. let's get into it bestie 💖

🌸 NAME 🌸

struct ubifs_trun_node — truncation node. that's the whole vibe: it's the node for truncation, periodt 💅

✨ SYNOPSIS ✨

struct ubifs_trun_node {
    struct ubifs_ch ch;
    __le32 inum;
    __u8 padding[12];
    __le64 old_size;
    __le64 new_size;
};

🎀 Members 🎀

• ch — common header, the little intro every node needs 🫶
• inum — truncated inode number, iykyk
• padding — reserved for future, zeroes ✨
• old_size — size before truncation
• new_size — size after truncation

💖 Description 💖

okay so the big thing here: this node exists only in the journal and never goes to the main area. literally never. it's journal-only main character energy 🦋

also note: do not forget to amend zero_trun_node_unused function when changing the padding fields. like bestie please don't leave that function hanging 😭

🌈 SEE ALSO 🌈

Kernel file ./fs/ubifs/ubifs-media.h — and the whole iconique struct crew: struct ubifs_ch(9), union ubifs_dev_desc(9), struct ubifs_ino_node(9), struct ubifs_dent_node(9), struct ubifs_data_node(9), struct ubifs_pad_node(9), struct ubifs_sb_node(9), struct ubifs_mst_node(9), struct ubifs_ref_node(9), struct ubifs_auth_node(9), struct ubifs_sig_node(9), struct ubifs_branch(9), struct ubifs_idx_node(9), struct ubifs_cs_node(9), struct ubifs_orph_node(9). obsessed with this little lineup fr fr 👑

okay bye bestie — this page is sourced from ./fs/ubifs, dated October 2026, and it's all about struct ubifs_trun_node(9) 💅✨