STRUCT SIZE_ENTRY(9)

💅 struct size_entry(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes, that Kernel API Manual — and today's main character is a lil struct that literally exists so your inode sizes can be recovered after things go sideways. no cap. 🫶

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✨ NAME ✨

struct size_entry — inode size information for recovery. that's it, that's the vibe. 💖

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🌸 SYNOPSIS 🌸

struct size_entry {
    struct rb_node rb;
    ino_t inum;
    loff_t i_size;
    loff_t d_size;
    int exists;
    struct inode *inode;
 };

look at her. iconic. six fields. zero notes. ✨

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🎀 Members 🎀

• rb — her link in the RB-tree of sizes. yes bestie, she's in a red-black tree, it's giving main character energy. 🌈
• inum — the inode number. literally who she is. 💅
• i_size — the size on inode. the size stored right there on the inode itself. 🦋
• d_size — the maximum size based on data nodes. highkey a different number, lowkey important. 👑
• exists — indicates whether the inode exists. vibe check: does she exist or not. ⭐
• inode — the inode if it's pinned in memory awaiting rw mode to fix it. not just any inode — one that's pinned and waiting. she's on hold until rw mode comes through. 😭

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💜 SEE ALSO 💜

the Kernel file ./fs/ubifs/recovery.c is where the whole friend group lives, and here's the whole squad, no one left out, periodt:

• is_empty(9)
• first_non_ff(9)
• get_master_node(9)
• write_rcvrd_mst_node(9)
• ubifs_recover_master_node(9)
• ubifs_write_rcvrd_mst_node(9)
• is_last_write(9)
• clean_buf(9)
• no_more_nodes(9)
• fix_unclean_leb(9)
• drop_last_group(9)
• drop_last_node(9)
• ubifs_recover_leb(9)
• get_cs_sqnum(9)
• ubifs_recover_log_leb(9)
• recover_head(9)
• ubifs_recover_inl_heads(9)
• clean_an_unclean_leb(9)
• ubifs_clean_lebs(9)
• grab_empty_leb(9)
• ubifs_rcvry_gc_commit(9)
• add_ino(9)
• find_ino(9)
• remove_ino(9)
• ubifs_destroy_size_tree(9)
• ubifs_recover_size_accum(9)
• fix_size_in_place(9)
• inode_fix_size(9)
• ubifs_recover_size(9)

like, the whole recovery.c friend group ate and left no crumbs. 🔥

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bestie, this page came straight out of ./fs/ubifs and it's dated October 2026 — so yeah, mark your calendar, she's from the future. 💀✨ mwah, go fix those inode sizes. 🎀