vdo_get_index_region_start(9)

👑 vdo_get_index_region_start — a Kernel API Manual moment 🎀

okay so bestie. this little icon is from the Kernel API Manual, and it does exactly one thing but it does it flawlessly, and honestly? we stan a focused function. 💅

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✨ NAME ✨

vdo_get_index_region_start — get the start of the index region from a geometry. that's it. that's the whole job. she's a getter and she's booked and busy. 🦋

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🌸 SYNOPSIS 🌸

physical_block_number_t vdo_get_index_region_start (struct
volume_geometry geometry );

so she takes a struct volume_geometry and she hands you back a physical_block_number_t. read it, love it, memorize it. ✨

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💖 ARGUMENTS 💖

• geometry — the geometry. the one and only. give her the geometry, she gives you the start. no cap. 🫶

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⭐ RETURN ⭐

the start of the index region. literally that. no surprises, no plot twists, no hidden side quests. just the start of the index region, bestie. 🔥

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🌈 SEE ALSO 🌈

okay this is the part where the group chat gets LONG, so grab a snack 🍓. all of these are siblings from the Kernel file ./drivers/md/dm-vdo/encodings.h Block map entries(9) era:

• 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_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… that's a whole friend group. pack and unpack girlies stay winning. 👑

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💀 reminder that this is kernel API territory — it's giving "read the source, know the source" energy. iykyk.

okay that's the page, ily, go call a getter responsibly 🧚💜

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mwah 💋 this one lives in ./drivers/md/dm-vdo and it's dated October 2026, and yeah the name up top and down here is the same because that's just how vdo_get_index_region_start(9) rolls. periodt. 🎀