vdo_get_data_region_start(9)

💅 vdo_get_data_region_start — a Kernel API Manual moment (section 9, bestie)

Okay so real talk, this is a page straight out of the Linux kernel's dm-vdo docs — it lives in the Kernel API Manual, and the function is called vdo_get_data_region_start(9). Yes the manual name is also the function name, we love a self-titled icon 👑

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✨ NAME ✨

vdo_get_data_region_start — literally just: get the start of the data region from a geometry. That's it. That's the whole job. Simple queen behavior 💅

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🫶 SYNOPSIS 🫶

physical_block_number_t vdo_get_data_region_start (struct
       volume_geometry geometry );

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🎀 ARGUMENTS 🎀

• geometry — the geometry. She's the input, she's the moment, she's what you hand over 🦋

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⭐ RETURN ⭐

The start of the data region. It comes back to you as a physical_block_number_t, and it's giving exactly what it says on the tin, no cap ✨

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🌈 SEE ALSO 🌈

The kernel file ./drivers/md/dm-vdo/encodings.h and its whole friend group — Block map entries(9), plus:

• 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_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)

That's the whole squad, go say hi 💖

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And that's the page, bestie 🧚 This little gem comes from ./drivers/md/dm-vdo, dated October 2026, and it signs off as vdo_get_data_region_start(9) — iconic from the first line to the last, periodt 💜🌸