perform_grow_logical(9)

💖 perform_grow_logical(9) — Kernel API Manual 💖

okay so bestie, welcome to the perform_grow_logical page, straight out of the kernel API manual ✨ this one's short but it's mighty, and like every good glow-up it comes with rules 🎀

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✨ NAME ✨

perform_grow_logical — grow the logical size of the vdo 🌱 (yes queen, make it bigger)

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🌸 SYNOPSIS 🌸

int perform_grow_logical (struct vdo *vdo , block_count_t
new_logical_blocks );

like literally that's the whole function signature, no cap 🫶

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💅 ARGUMENTS 💅

• vdo — the vdo that's getting the glow-up 💖 this is the one you're growing.
• new_logical_blocks — the size the vdo should be grown to, i.e. the target number of logical blocks. this is the destination, not the journey ✨

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🦋 CONTEXT 🦋

okay so this is the important part, do not skip 🙈

• You may only call this method when the vdo has been suspended.
• It must not be called from a base thread.

fr fr, respect the context restrictions or it's giving undefined behaviour 💀

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⭐ RETURN ⭐

Returns VDO_SUCCESS or an error. that's it, that's the tea 👑

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🌈 SEE ALSO 🌈

Kernel file ./drivers/md/dm-vdo/dm-vdo-target.c, plus this whole squad of related pages (yes, all of them, i'm not skipping a single one 🫶):

• free_device_config(9)
• get_version_number(9)
• parse_bool(9)
• parse_memory(9)
• parse_slab_size(9)
• process_one_thread_config_spec(9)
• parse_one_thread_config_spec(9)
• parse_thread_config_string(9)
• process_one_key_value_pair(9)
• parse_one_key_value_pair(9)
• parse_key_value_pairs(9)
• parse_optional_arguments(9)
• handle_parse_error(9)
• parse_device_config(9)
• get_thread_id_for_phase(9)
• advance_phase(9)
• finish_operation_callback(9)
• decode_from_super_block(9)
• decode_vdo(9)
• pre_load_callback(9)
• get_bit_array_size(9)
• grow_bit_array(9)
• allocate_instance(9)
• check_may_grow_physical(9)
• grow_layout(9)
• validate_new_device_config(9)
• write_super_block_for_suspend(9)
• suspend_callback(9)
• was_new(9)
• requires_repair(9)
• get_load_type(9)
• load_callback(9)
• handle_load_error(9)
• write_super_block_for_resume(9)
• resume_callback(9)
• grow_logical_callback(9)
• handle_logical_growth_error(9)
• copy_partition(9)
• grow_physical_callback(9)
• handle_physical_growth_error(9)
• perform_grow_physical(9)
• apply_new_vdo_configuration(9)

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and that's the whole page, bestie, you ate that 🍓 mwah 💜

this little love letter lives in ./drivers/md/dm-vdo, dated October 2026 — see you in the next man page, slay 💅✨