netfs_read_folio(9)

✨ netfs_read_folio(9) ✨

okay so this is a page from the Kernel API Manual, and it’s literally all about netfs_read_folio — the helper bestie for managing a read_folio request. 🫶💖

🌸 NAME 🌸

netfs_read_folio — helper to manage a read_folio request. periodt. 💅

🦋 SYNOPSIS 🦋

int netfs_read_folio (struct file *file , struct folio *folio );

🎀 ARGUMENTS 🎀

• file — the file to read from, bestie. 📂
• folio — the folio to read. 📖✨

💜 DESCRIPTION 💜

so the vibe is: fulfil a read_folio request by drawing data from the cache if possible, or from the netfs if not. ✨ That’s the whole assignment.

Space beyond the EOF is zero-filled. 🫧 And yes, multiple I/O requests from different sources will get munged together — that’s canon, not a typo. 💀💅

The calling netfs must initialise a netfs context contiguous to the vfs inode before calling this. no skipping that step, bestie. 🎀👑

This is usable whether or not caching is enabled. slay. 🔥

🌈 SEE ALSO 🌈

• Kernel file ./fs/netfs/buffered_read.c
• netfs_readahead(9)
• netfs_write_begin(9)
• netfs_buffered_read_iter(9)
• netfs_file_read_iter(9)

and that’s the whole page! 💖 this iconic little entry is from source/version ./fs/netfs, dated October 2026. mwah 💋✨