vdo_pack_header(9)

💅 vdo_pack_header(9) — Kernel API Manual ✨

okay so bestie, welcome to the vdo_pack_header(9) page, aka the glow-up station for component headers. this is the kernel API manual and we're about to make your header look right for the disk. no cap.

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🎀 NAME 🎀

vdo_pack_header — converts a component header into its packed on-disk representation. literally taking your cozy in-memory header and putting it in its travel fit so it can live on disk. slay.

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✨ SYNOPSIS ✨

struct packed_header vdo_pack_header (const struct header *header );

that's it. one argument, one return, one iconic little function. 💖

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🌸 ARGUMENTS 🌸

• header — the header you want to convert. hand it over, she's getting packed. 🎀

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🦋 RETURN 🦋

returns the platform-independent representation of the header. so like, it doesn't matter what machine you're on — the packed form is the packed form. main character energy, honestly. 👑

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🌈 SEE ALSO 🌈

the whole friend group, gathered here in ./drivers/md/dm-vdo/encodings.h. say hi to everybody:

• Block map entries(9)
• vdo_are_same_version(9)
• vdo_pack_version_number(9)
• vdo_unpack_version_number(9)
• vdo_unpack_header(9)
• vdo_get_index_region_start(9)
• vdo_get_data_region_start(9)
• vdo_get_index_region_size(9)
• vdo_pack_recovery_journal_entry(9)
• vdo_unpack_recovery_journal_entry(9)
• vdo_is_valid_recovery_journal_sector(9)
• vdo_compute_recovery_journal_block_number(9)
• vdo_get_journal_block_sector(9)
• vdo_pack_recovery_block_header(9)
• vdo_unpack_recovery_block_header(9)
• vdo_compute_slab_count(9)
• vdo_get_saved_reference_count_size(9)
• vdo_get_slab_journal_start_block(9)
• vdo_advance_journal_point(9)
• vdo_before_journal_point(9)
• vdo_pack_journal_point(9)
• vdo_unpack_journal_point(9)
• vdo_pack_slab_journal_block_header(9)
• vdo_unpack_slab_journal_block_header(9)
• vdo_pack_slab_journal_entry(9)
• vdo_unpack_slab_journal_entry(9)
• vdo_get_slab_summary_hint_shift(9)

like, the entire cast. iykyk. 🫶

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ngl bestie, if you're packing something, make sure you know what you're packing — this page is about headers, and the unpacking friend is right there in SEE ALSO if you ever need to go the other way. 💅

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and that's the page!! brought to you by ./drivers/md/dm-vdo, dated October 2026, in the vdo_pack_header(9) era. go pack something cute. 💜🎀✨