decode_volume_geometry(9)

🦋 decode_volume_geometry(9) 🦋

okay so bestie, this is a page from the Kernel API Manual, and it’s all about decode_volume_geometry — literally decoding the on-disk representation of a volume geometry from a buffer. slay. 💅

🌸 NAME 🌸

decode_volume_geometry — decode the on-disk representation of a volume geometry from a buffer. periodt. ✨

✨ SYNOPSIS ✨

void decode_volume_geometry (u8 *buffer , size_t *offset , struct
volume_geometry *geometry , u32 version );

it’s giving void return, four arguments, very decode-core. 🫶

🎀 ARGUMENTS 🎀

• buffer — a buffer to decode from, bestie.
• offset — the offset in the buffer at which to decode. track it. 👀
• geometry — the structure to receive the decoded fields.
• version — the geometry block version to decode.

🔥 SEE ALSO 🔥

the kernel file is ./drivers/md/dm-vdo/encodings.c, and the whole friend group it points at is:

• validate_version(9)
• vdo_validate_header(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_depot(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)

xoxo, source/version ./drivers/md/dm-vdo 💖 dated October 2026, signing off as decode_volume_geometry(9) 🎀✨