blk_mq_all_tag_iter(9)

✨ blk_mq_all_tag_iter(9) ✨

okay so this is a page from the Kernel API Manual, and bestie, it's giving "walk every single request in a tag map" energy 💅 like literally the whole vibe is iteration, no cap.

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🌸 NAME 🌸

blk_mq_all_tag_iter — iterate over all requests in a tag map 🦋

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⭐ SYNOPSIS ⭐

void blk_mq_all_tag_iter (struct blk_mq_tags *tags , busy_tag_iter_fn
*fn , void *priv );

copy it exactly, don't @ me 🙈

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🎀 ARGUMENTS 🎀

• tags — the tag map you're iterating over, periodt. This is your main character ✨
• fn — pointer to the function that gets called for each request. And the way it gets called is literally:

fn(rq, priv)

where rq is a pointer to a request 🔥 return true to keep iterating tags, return false to stop. it's giving "keep going or pull the plug" 💀

• priv — gets passed as the second argument to fn. that's it, that's the whole job 🫶

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💖 DESCRIPTION 💖

so the caller has to pass the tag map from which requests are allocated. that's the whole requirement, bestie — no tag map, no party 🙈

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🌈 SEE ALSO 🌈

kernel file ./block/blk-mq-tag.c plus these iconic little functions, go read them too, iykyk 👑

• bt_for_each(9)
• bt_tags_for_each(9)
• blk_mq_tagset_busy_iter(9)
• blk_mq_tagset_wait_completed_request(9)
• blk_mq_queue_tag_busy_iter(9)
• blk_mq_unique_tag(9)

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and that's the whole page, no notes 💜 this cutie lives under ./block and it's dated October 2026, so like… mark your calendars bestie, and remember: blk_mq_all_tag_iter(9) ate and left no crumbs 🍓✨