vdo_submit_m...ata_vio_wait(9)

💜 vdo_submit_m...ata_vio_wait(9) — the Kernel API Manual, bestie edition

okay so real talk, this is vdo_submit_m...ata_vio_wait from the Linux Kernel API manual, and she is lowkey the moment you need when the work queues haven't even been born yet. keep reading, i promise it's giving clutch. ✨

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✨ NAME ✨

vdo_submit_metadata_vio_wait — submit I/O for a metadata vio and wait for it to complete. yes bestie, the waiting is the whole personality. 🎀

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🌸 SYNOPSIS 🌸

int vdo_submit_metadata_vio_wait (struct vio *vio ,
physical_block_number_t physical , blk_opf_t operation );

look at that signature, she ate. 💅

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🦋 ARGUMENTS 🦋

• vio — the vio you're issuing I/O for. that's her, that's the main character. 👑
• physical — the physical block number to read from or write to. like, the actual address on disk, no cap. 📍
• operation — the type of I/O to perform. what flavour of I/O are we doing today, bestie? 🔥

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💖 DESCRIPTION 💖

so this function works basically the same as __submit_metadata_vio, except — and this is the important part — it blocks until the work is done. like it will literally sit there and wait, fr fr. 😭

it's the one you reach for when you need to do i/o before work queues and thread completions are set up. early-bird energy. 🐣✨

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🌈 RETURN 🌈

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

ngl, always check the return value. VDO_SUCCESS is the slay outcome; anything else means something went sideways. 💀

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⭐ SEE ALSO ⭐

kernel file ./drivers/md/dm-vdo/io-submitter.c:

• count_all_bios(9)
• assert_in_bio_zone(9)
• send_bio_to_device(9)
• vdo_submit_vio(9)
• get_bio_list(9)
• submit_data_vio(9)
• get_mergeable_locked(9)
• try_bio_map_merge(9)
• vdo_submit_data_vio(9)
• __submit_metadata_vio(9)
• vdo_make_io_submitter(9)
• vdo_cleanup_io_submitter(9)
• vdo_free_io_submitter(9)

the whole friend group, together again. 🫶

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and that's the page! 🧚 shoutout to ./drivers/md/dm-vdo — the source/version of this little masterpiece — dated October 2026. mwah, iconic, no notes. 💜🌸