_copy_from_pages(9)

💅 NAME 💅

Hey bestie, welcome to _copy_from_pages(9) from the Kernel API Manual ✨ The original NAME line is literally _copy_from_pages - with no description after the dash, so she's giving mysterious main character energy. No cap.

✨ SYNOPSIS ✨

void _copy_from_pages (char *p , struct page **pages , size_t pgbase ,
       size_t len );

That's the whole signature, and yes, every comma and space is doing its little thing. 💅

🎀 ARGUMENTS 🎀

• p — pointer to destination. That's where the data is going, bestie.
• pages — array of pages. The source squad. 🦋
• pgbase — offset of source data. Where in the source we start, iykyk.
• len — length. How much data we're moving.

🦋 DESCRIPTION 🦋

So _copy_from_pages copies data into an arbitrary memory location from an array of pages. That's the vibe: arbitrary destination, pages as the source. 💖

The copy is assumed to be non-overlapping. That's the caveat, so keep it non-overlapping and don't be messy about it, periodt. 🌸

🌈 SEE ALSO 🌈

Kernel file ./net/sunrpc/xdr.c — go look at the source, she's right there. Also the whole xdr extended universe:

• xdr_encode_opaque_fixed(9)
• xdr_encode_opaque(9)
• xdr_terminate_string(9)
• xdr_buf_to_bvec(9)
• xdr_buf_to_sg(9)
• xdr_buf_to_sg_alloc(9)
• xdr_inline_pages(9)
• _shift_data_left_pages(9)
• _shift_data_right_pages(9)
• _copy_to_pages(9)
• xdr_buf_pages_zero(9)
• xdr_shrink_bufhead(9)
• xdr_shrink_pagelen(9)
• xdr_stream_pos(9)
• xdr_page_pos(9)
• xdr_init_encode(9)
• xdr_init_encode_pages(9)
• __xdr_commit_encode(9)
• xdr_reserve_space(9)
• xdr_reserve_space_vec(9)
• xdr_truncate_encode(9)
• xdr_truncate_decode(9)
• xdr_restrict_buflen(9)
• xdr_write_pages(9)
• xdr_init_decode(9)
• xdr_init_decode_pages(9)
• xdr_finish_decode(9)
• xdr_inline_decode(9)
• xdr_read_pages(9)
• xdr_set_pagelen(9)
• xdr_enter_page(9)
• xdr_buf_subsegment(9)
• xdr_stream_subsegment(9)
• xdr_stream_move_subsegment(9)
• xdr_stream_zero(9)
• xdr_buf_trim(9)
• xdr_stream_decode_string_dup(9)
• xdr_stream_decode_opaque_auth(9)
• xdr_stream_encode_opaque_auth(9)

Source/version and date sign-off: this cutie lives under ./net/sunrpc, dated October 2026, in the _copy_from_pages(9) section 💖✨