dbg_check_space_info(9)

✨ dbg_check_space_info ✨

ok so this is dbg_check_space_info(9) from the Kernel API Manual — yes the whole page is literally named after the function, main character energy fr 💅

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🌸 NAME 🌸

dbg_check_space_info — the little vibe-check function that checks your flash space information 🫶

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🦋 SYNOPSIS 🦋

int dbg_check_space_info (struct ubifs_info *c );

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🎀 ARGUMENTS 🎀

• c — the UBIFS file-system description object, aka the whole personality of the filesystem packed into one struct ✨

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💖 DESCRIPTION 💖

okay so here's the tea ☕ — this function takes your current flash space information and compares it to the snapshot that got saved back when dbg_save_space_info was called. like a before-and-after pic but for kernel memory 📸

If nothing changed, it returns zero. Slay. ✨

If it did change, it returns -EINVAL — and yeah that's basically the kernel going "bestie what happened here 😭".

So, to recap the returns, no cap:

• returns zero if the information has not changed 👑
• returns -EINVAL if it has changed 💀

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🔥 SEE ALSO 🔥

Kernel file ./fs/ubifs/debug.c plus this whole friend group:

• ubifs_dump_index(9)
• dbg_save_space_info(9)
• dbg_check_synced_i_size(9)
• dbg_check_key_order(9)
• dbg_check_znode(9)
• dbg_check_tnc(9)
• dbg_walk_index(9)
• add_size(9)
• dbg_check_idx_size(9)
• struct fsck_inode(9)
• struct fsck_data(9)
• add_inode(9)
• search_inode(9)
• read_add_inode(9)
• check_leaf(9)
• free_inodes(9)
• check_inodes(9)
• dbg_check_filesystem(9)
• dbg_check_data_nodes_order(9)
• dbg_check_nondata_nodes_order(9)
• provide_user_output(9)
• interpret_user_input(9)
• dbg_debugfs_init_fs(9)
• dbg_debugfs_exit_fs(9)
• dbg_debugfs_init(9)
• dbg_debugfs_exit(9)
• ubifs_debugging_init(9)
• ubifs_debugging_exit(9)

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and that's the whole page bestie 🧚💜 it lives in ./fs/ubifs, dated October 2026, and it's dbg_check_space_info(9) all the way down — periodt 🌈⭐