tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/net.h>
4#include <linux/uio.h>
5#include <net/sock.h>
6#include <linux/nospec.h>
7
8#include "rsrc.h"
9
10#define IO_NOTIF_SPLICE_BATCH 32
11
12struct io_notif_data {
13 struct file *file;
14 struct ubuf_info uarg;
15 unsigned long account_pages;
16};
17
18void io_notif_flush(struct io_kiocb *notif);
19struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
20
21static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
22{
23 return io_kiocb_to_cmd(notif, struct io_notif_data);
24}
25
26static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)
27{
28 struct io_ring_ctx *ctx = notif->ctx;
29 struct io_notif_data *nd = io_notif_to_data(notif);
30 unsigned nr_pages = (len >> PAGE_SHIFT) + 2;
31 int ret;
32
33 if (ctx->user) {
34 ret = __io_account_mem(ctx->user, nr_pages);
35 if (ret)
36 return ret;
37 nd->account_pages += nr_pages;
38 }
39 return 0;
40}