decode_vdo_component(9)

💅 decode_vdo_component — a Kernel API Manual moment ✨

Okay bestie, gather round, because this one's a little function with main character energy 🫶 It's decode_vdo_component(9) from the Kernel API Manual, and it's literally here to decode the component data for the vdo itself out of the super block. That's the whole vibe. No cap.

---

✨ NAME ✨

decode_vdo_component — decode the component data for the vdo itself out of the super block 💖

---

🎀 SYNOPSIS 🎀

int decode_vdo_component (u8 *buffer , size_t *offset , struct
vdo_component *component );

Periodt. That's the signature, copied exactly, don't come for me 💅

---

🌸 ARGUMENTS 🌸

• buffer — the buffer being decoded, i.e. the lil' pile of bytes you're pulling data out of 🧚
• offset — the offset to start decoding from, so she knows exactly where to begin 👑
• component — the vdo component structure to decode into; this is the destination, the moment, the spot where the decoded stuff lands 🎀

---

🌈 RETURN 🌈

VDO_SUCCESS or an error. That's it, that's the whole check-in 🦋

---

🔥 SEE ALSO 🔥

Kernel file ./drivers/md/dm-vdo/encodings.c, plus the whole friend group:

• 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_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)
• 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)

---

And that's the page, bestie 💜 It lives in ./drivers/md/dm-vdo, it's dated October 2026, and the version tag is decode_vdo_component(9) — so go forth, decode that component data, and slay ✨💅🌟