blkdev_get_zone_info(9)

✨ blkdev_get_zone_info — bestie edition ✨

okay so this is a page from the Kernel API Manual (section 9, the kernel-functions aisle 🫶) and it's all about getting zone info for one specific zone. it's giving "niche but iconic" tbh.

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🌸 NAME 🌸

blkdev_get_zone_info — grab a single zone's information out of the cached data 💅

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🦋 SYNOPSIS 🦋

int blkdev_get_zone_info (struct block_device *bdev , sector_t sector ,
struct blk_zone *zone );

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💖 ARGUMENTS 💖

• bdev — the target block device, aka the main character of this whole operation 👑
• sector — a sector that's contained by the target zone (yes, it just has to live inside it, it doesn't have to be the first one 🎀)
• zone — the zone structure where the zone information gets returned 🌸

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✨ DESCRIPTION ✨

so basically: you're getting the zone information for the zone that contains sector, and the way it does that is with the zone write plug of the target zone — if one exists — or the disk zone condition array otherwise. either way, you're covered, bestie 💅

real talk though: the zone condition may be reported as being the BLK_ZONE_COND_ACTIVE condition for a zone that is actually in the implicit open, explicit open or closed condition. so don't come for the report, it's just how it vibes 🙈

it returns 0 on success and a negative error code on failure. no cap ✨

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🔥 SEE ALSO 🔥

kernel file ./block/blk-zoned.c and honestly the whole friend group:

• blk_zone_cond_str(9)
• bdev_zone_is_seq(9)
• blkdev_report_zones(9)
• blkdev_zone_mgmt(9)
• disk_report_zone(9)
• blkdev_report_zones_cached(9)
• blk_zone_plug_bio(9)
• blk_revalidate_disk_zones(9)
• blk_zone_issue_zeroout(9)

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ngl the "zone condition may be reported as BLK_ZONE_COND_ACTIVE" bit is the one thing to actually remember — it's a real caveat, not a vibe check fail 🫶

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okay that's the whole page, bestie 💜 source is the ./block kernel file, and this lil manual page is dated October 2026 — so mark your calendars and slay the zone management, periodt 🎀🌈⭐