xdr_enter_page(9)

📦 version 7.3.1, in nixpkgs unstable

💅 xdr_enter_page — NAME

okay so this is xdr_enter_page from the Kernel API Manual (section 9, bestie, kernel-land), and what it does is decode data from the XDR page. that's the whole vibe. 🦋

✨ SYNOPSIS ✨

void xdr_enter_page (struct xdr_stream *xdr , unsigned int len );

like, it returns void, it takes two things, and yes the spacing in that signature is exactly that. no notes. 🎀

🌸 ARGUMENTS 🌸

  • xdr — pointer to xdr_stream struct. your stream, your main character. 👑
  • len — number of bytes of page data. the count. the amount. the len. ✨

💖 DESCRIPTION 💖

okay so here's the tea 🍓 — this function moves data beyond the current pointer position from the XDR head[] buffer into the page list. the way that works is genuinely iconic.

any data that lies beyond current position + len bytes gets moved into the XDR tail[]. that's the overflow, that's the leftovers, and it's handled. 🫶

and then, after all that shuffling, the current pointer is repositioned at the beginning of the first XDR page. tadah. slay. 💅

fr fr this is all about the pointer going from the head buffer to the pages, with the tail catching whatever doesn't fit before position + len. no cap. 🔥

🦋 SEE ALSO 🦋

the whole friend group, iykyk 💜 — and yes, the kernel file itself lives at ./net/sunrpc/xdr.c:

and that's the page!! 🧚 mwah 💋 — this one ships out of ./net/sunrpc and it's dated October 2026, so like, future-coded but make it kernel. ⭐🌈

📦 where this page comes from