nilfs_write_root_mdt_inode(9)

💖 nilfs_write_root_mdt_inode(9) 💖

okay so bestie, welcome to the Kernel API Manual entry for nilfs_write_root_mdt_inode — yes the name is a whole mouthful, yes it's iconic, no we're not skipping any of it 🫶

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✨ NAME ✨

nilfs_write_root_mdt_inode — the girl whose whole job is exporting root metadata inode info to the on-disk inode 💅

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🌸 SYNOPSIS 🌸

void nilfs_write_root_mdt_inode (struct inode *inode , struct nilfs_inode *raw_inode );

like, that's the whole signature. no return value, she just does the thing and dips ✨

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🎀 ARGUMENTS 🎀

• inode — the inode object of the root metadata file, aka the main character of this whole operation 👑
• raw_inode — the on-disk inode, the physical bestie she's writing into 🦋

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💜 DESCRIPTION 💜

so what does she actually do? nilfs_write_root_mdt_inode writes the inode information and the bmap data of inode into the inode area of the metadata file — and that metadata file is allocated on the super root block that was created to finalize the log. iykyk 🔥

and here's the cute detail: since super root blocks get configured each time, this function zero-fills the unused area of raw_inode. like, not me cleaning up after myself, we love a tidy queen 🧹✨ no cap, that's literally in the spec.

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🦋 SEE ALSO 🦋

Kernel file ./fs/nilfs2/segment.c and her whole friend group, fr fr:

• nilfs_transaction_begin(9)
• nilfs_transaction_commit(9)
• nilfs_segctor_reset_segment_buffer(9)
• nilfs_segctor_zeropad_segsum(9)
• nilfs_free_segments(9)
• nilfs_segctor_begin_construction(9)
• nilfs_prepare_write_logs(9)
• nilfs_segctor_start_timer(9)
• nilfs_construct_segment(9)
• nilfs_construct_dsync_segment(9)
• nilfs_segctor_accept(9)
• nilfs_segctor_notify(9)
• nilfs_segctor_construct(9)
• nilfs_log_write_required(9)
• nilfs_segctor_thread(9)
• nilfs_segctor_destroy(9)
• nilfs_attach_log_writer(9)
• nilfs_detach_log_writer(9)

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💀 lowkey a whole squad. go read them too, bestie, they're all right there in ./fs/nilfs2 and they ate 💅

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and that's the page!! 🌈 mwah 💋 — this one's brought to you by the ./fs/nilfs2 source and the October 2026 version, from your girl the Kernel API Manual. periodt. 🎀🦋💖