vdo_configure_slab_depot(9)

💾 vdo_configure_slab_depot(9) — from the Kernel API Manual bestie!! ✨

okay so picture this: we're deep in the kernel, right, and somebody has to actually set up the slab depot. that somebody is this function. let's get into it 💅

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🎀 NAME 🎀

vdo_configure_slab_depot — no cap, this one configures the slab depot. that's the whole job. iconic honestly.

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🌸 SYNOPSIS 🌸

int vdo_configure_slab_depot (const struct partition *partition ,
                              struct slab_config slab_config ,
                              zone_count_t zone_count ,
                              struct slab_depot_state_2_0 *state );

like… four whole parameters. she's thorough. we respect it 🫶

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🦋 ARGUMENTS 🦋

• partition — the slab depot partition. that's her home base 💖
• slab_config — the configuration of a single slab. yes, a single slab, she's doing them one at a time, methodically, main character energy
• zone_count — how many zones the depot is gonna use. count 'em, bestie 🔢
• state — the state structure that's getting configured. she gets filled in. literally 🌈

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🌼 DESCRIPTION 🌼

so what's actually happening here? the function configures the slab_depot for the specified storage capacity — and the way that works is it figures out the number of data blocks that will fit while still leaving room for the depot metadata. like, you can't just shove blocks in there, the metadata needs a seat too 😭

then it returns the saved state for that configuration. that's it, that's the vibe check, and she passed ✨

ngl the "leave room for the metadata" part is the whole personality of this function. do not forget the metadata. the metadata is also a main character.

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🔥 RETURN 🔥

VDO_SUCCESS or an error code. that's the duality of kernel programming honestly 💀

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👑 SEE ALSO 👑

okay this list is long long. but she ate, so we're listing every single one, periodt. the kernel file in question is ./drivers/md/dm-vdo/encodings.c:

• validate_version(9)
• vdo_validate_header(9)
• decode_volume_geometry(9)
• vdo_encode_volume_geometry(9)
• vdo_parse_geometry_block(9)
• vdo_compute_new_forest_pages(9)
• encode_recovery_journal_state_7_0(9)
• decode_recovery_journal_state_7_0(9)
• vdo_get_journal_operation_name(9)
• encode_slab_depot_state_2_0(9)
• decode_slab_depot_state_2_0(9)
• vdo_configure_slab(9)
• vdo_decode_slab_journal_entry(9)
• allocate_partition(9)
• make_partition(9)
• vdo_initialize_layout(9)
• vdo_uninitialize_layout(9)
• vdo_get_partition(9)
• vdo_get_known_partition(9)
• pack_vdo_config(9)
• pack_vdo_component(9)
• unpack_vdo_config(9)
• unpack_vdo_component_41_0(9)
• decode_vdo_component(9)
• vdo_validate_config(9)
• vdo_destroy_component_states(9)
• decode_components(9)
• vdo_decode_component_states(9)
• vdo_validate_component_states(9)
• vdo_encode_component_states(9)
• vdo_encode_super_block(9)
• vdo_decode_super_block(9)
• vdo_initialize_component_states(9)
• vdo_compute_index_blocks(9)
• vdo_initialize_volume_geometry(9)

35 of them. 35!! and yes i checked, twice 💜

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that's the whole page bestie, go configure a slab depot, you've got this 🧚💖

from ./drivers/md/dm-vdo, dated October 2026 — mwah, xoxo, stan the kernel 🌸🎀💅