netfs_unbuffered_write_iter(9)

✨ NAME ✨

okay so bestie, welcome to the netfs_unbuffered_write_iter(9) page in the Kernel API Manual — one-liner: Unbuffered write to a file. that's the whole vibe. 💅

🌸 SYNOPSIS 🌸

ssize_t netfs_unbuffered_write_iter (struct kiocb *iocb , struct
iov_iter *from );

💅 ARGUMENTS 💅

• iocb — the IO state structure, aka the whole state-of-the-IO situation.
• from — an iov_iter with the data to write. the data. the contents. the material. 🫶

🦋 DESCRIPTION 🦋

okay so this function does an unbuffered write to a file — it writes the data directly to the server and does not lodge the data in the pagecache. no pagecache sleepover, no caching situation, periodt. ✨

🎀 RETURN 🎀

• a negative error code if no data has been written at all or vfs_fsync_range failed for a synchronous write. yeah. that kind of day. 😭
• the number of bytes written, even for truncated writes — yes, even then, bestie. it still reports bytes. 🔥

👑 SEE ALSO 👑

• Kernel file ./fs/netfs/direct_write.c — go peek, iykyk. 🦋

source/version: ./fs/netfs · date: October 2026 · page: netfs_unbuffered_write_iter(9) — mwah 💋🎀