nilfs_bmap_truncate(9)

💫 nilfs_bmap_truncate(9) 💫

okay so bestie, welcome to the Kernel API Manual — specifically the nilfs_bmap_truncate(9) page, and yes this is the whole thing, we're getting into it 🎀

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✨ NAME ✨

nilfs_bmap_truncate — truncate a bmap to a specified key 🫶

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🌸 SYNOPSIS 🌸

int nilfs_bmap_truncate (struct nilfs_bmap *bmap , __u64 key );

like, that's the whole signature, no notes 💅

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🦋 ARGUMENTS 🦋

• bmap — bmap. that's it. that's the description. it's giving "the variable name says it all" energy, and honestly? iconic 🙈
• key — key. same vibe, same energy, we love a minimal queen ✨

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💜 DESCRIPTION 💜

okay so here's the tea: nilfs_bmap_truncate removes key-record pairs whose keys are greater than or equal to key from bmap. like a little cleanup crew that comes in and swipes everything from key onward 🧹✨ lowkey satisfying ngl.

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🔥 RETURN 🔥

so it returns 0 on success, or one of these negative error codes when things go sideways (and they can, bestie 😭):

• -EIO — I/O error (including metadata corruption). yeah that metadata corruption part is not a vibe, take it seriously fr fr 💀
• -ENOMEM — Insufficient memory available. the classic "ran out of memory" moment, we've all been there 🫠

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🌈 SEE ALSO 🌈

the whole friend group, assembled 👑

Kernel file ./fs/nilfs2/bmap.c

• nilfs_bmap_lookup_at_level(9)
• nilfs_bmap_insert(9)
• nilfs_bmap_seek_key(9)
• nilfs_bmap_delete(9)
• nilfs_bmap_clear(9)
• nilfs_bmap_propagate(9)
• nilfs_bmap_lookup_dirty_buffers(9)
• nilfs_bmap_assign(9)
• nilfs_bmap_mark(9)
• nilfs_bmap_test_and_clear_dirty(9)
• nilfs_bmap_read(9)
• nilfs_bmap_write(9)

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okay that's the whole page, no cap. go truncate something (responsibly) 💖

and that's a wrap, mwah 💋 — this one comes from ./fs/nilfs2, dated October 2026, and it's filing itself under nilfs_bmap_truncate(9). slay 🎀✨👑