netfs_unbuffered_read_iter(9)

💅 netfs_unbuffered_read_iter(9)

okay so this is a page from the Kernel API Manual (yes, the kernel has lore too, and it's a whole saga) — and today's main character is netfs_unbuffered_read_iter, which does exactly one thing and does it immaculately: an unbuffered or direct I/O read. no pagecache, no middleman, no vibes-based caching. just straight facts. 🦋

---

✨ SYNOPSIS ✨

ssize_t netfs_unbuffered_read_iter (struct kiocb *iocb , struct iov_iter
*iter );

like, literally the whole signature right there. ssize_t return because of course it returns a size, bestie, that's the whole point. 🎀

---

🌸 ARGUMENTS 🌸

• iocb — the I/O control descriptor that describes the read. it's the little ID card for the operation, iykyk. 🫶
• iter — the output buffer, and it also specifies the read length (yes queen, multitasking). 👑

---

🔥 DESCRIPTION 🔥

so here's the tea: this function performs an unbuffered I/O or direct I/O from the file in iocb to the output buffer. ☕

and the iconic part? No use is made of the pagecache. not a single crumb. zero. it's giving "I don't need your cache, I have places to be." 💅✨

---

🦋 SEE ALSO 🦋

• Kernel file ./fs/netfs/direct_read.c — the source file, go peek, it's lowkey iconic
• netfs_unbuffered_read_iter_locked(9) — the sibling, the locked variant, also slay 🌈

---

ngl bestie, that's the whole page. short, sweet, and it ate. no cap. 💖

---

and that's a wrap! this little number comes from ./fs/netfs, dated October 2026, living its best life in the Kernel API Manual. periodt. 🎀⭐💜