fs_dax_get_by_bdev(9)

💅 fs_dax_get_by_bdev — Kernel API Manual, bestie edition 🦋

okay so bestie, this page is from the Kernel API Manual, and we're talking about fs_dax_get_by_bdev(9) — the little lookup moment that's temporary for filesystem-dax. that's the whole name section, no cap ✨

✨ SYNOPSIS ✨

struct dax_device * fs_dax_get_by_bdev (struct block_device *bdev , u64
*start_off , void *holder , const struct dax_holder_operations *ops );

like just look at her. four arguments, returns a struct dax_device *, main character energy fr fr 👑

🎀 ARGUMENTS 🎀

• bdev — the block device we're out here hunting a dax_device for 🕵️‍♀️
• start_off — this one's an out-param bestie, it returns the byte offset into the dax_device where bdev starts 📍
• holder — the filesystem or mapped device that lives inside the dax_device 🫶
• ops — the operations for the inner holder, iykyk 💅

🌈 SEE ALSO 🌈

• Kernel file ./drivers/dax/super.c
• struct dax_device(9)
• fs_put_dax(9)
• fs_dax_get(9)
• dax_direct_access(9)
• dax_set_ops(9)
• dax_holder(9)
• inode_dax(9)

go read those too, they're all linked in the group chat 🔥

aaaand that's the whole page, short and sweet, we ate and left no crumbs 💀

shoutout to ./drivers/dax for hosting all this, dated October 2026, and this whole little yap sesh is filed under fs_dax_get_by_bdev(9) — see u in the next manpage bestie 💖🎀🌸