vdo_unpack_s...block_header(9)

💅 vdo_unpack_slab_journal_block_header(9) — from the Kernel API Manual, bestie

Okay so picture this: it's a section 9 page, it lives in the kernel API manual, and the function it's hyping up is vdo_unpack_slab_journal_block_header. The truncated little header up top reads vdo_unpack_s...block_header(9) on both sides, and honestly? She's iconic for that. ✨

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🌸 NAME 🌸

vdo_unpack_slab_journal_block_header — decodes the packed representation of a slab block header. That's it, that's the whole job. Unpack it, bestie. 🎀

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🦋 SYNOPSIS 🦋

void vdo_unpack_slab_journal_block_header (const struct
packed_slab_journal_block_header *packed , struct
slab_journal_block_header *header );

Like, that's the exact signature, don't @ me. 💅

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✨ ARGUMENTS ✨

• packed — the packed header you wanna decode. It's the one coming in, still in its little packed form, minding its own business.
• header — the header you're unpacking all those values into. The destination. The glow-up location. 🫶

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👑 SEE ALSO 👑

Kernel file ./drivers/md/dm-vdo/encodings.h — that's where the family lives, and then the whole extended crew:

• Block map entries(9)
• vdo_are_same_version(9)
• vdo_pack_version_number(9)
• vdo_unpack_version_number(9)
• vdo_pack_header(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_pack_slab_journal_entry(9)
• vdo_unpack_slab_journal_entry(9)
• vdo_get_slab_summary_hint_shift(9)

Like, read them all. iykyk. No skipping, babe, the whole list is the vibe check. 📚💀

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And that's the page, bestie! Signing off from ./drivers/md/dm-vdo, dated October 2026, under the ever-iconic name vdo_unpack_s...block_header(9). Slay. 💖🌈⭐