87 строки
2.2 KiB
C
87 строки
2.2 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/net.h>
|
|
#include <linux/io_uring.h>
|
|
|
|
#include "io_uring.h"
|
|
#include "notif.h"
|
|
#include "rsrc.h"
|
|
|
|
static void io_notif_complete_tw_ext(struct io_kiocb *notif, bool *locked)
|
|
{
|
|
struct io_notif_data *nd = io_notif_to_data(notif);
|
|
struct io_ring_ctx *ctx = notif->ctx;
|
|
|
|
if (nd->zc_report && (nd->zc_copied || !nd->zc_used))
|
|
notif->cqe.res |= IORING_NOTIF_USAGE_ZC_COPIED;
|
|
|
|
if (nd->account_pages && ctx->user) {
|
|
__io_unaccount_mem(ctx->user, nd->account_pages);
|
|
nd->account_pages = 0;
|
|
}
|
|
io_req_task_complete(notif, locked);
|
|
}
|
|
|
|
static void io_tx_ubuf_callback(struct sk_buff *skb, struct ubuf_info *uarg,
|
|
bool success)
|
|
{
|
|
struct io_notif_data *nd = container_of(uarg, struct io_notif_data, uarg);
|
|
struct io_kiocb *notif = cmd_to_io_kiocb(nd);
|
|
|
|
if (refcount_dec_and_test(&uarg->refcnt))
|
|
io_req_task_work_add(notif);
|
|
}
|
|
|
|
static void io_tx_ubuf_callback_ext(struct sk_buff *skb, struct ubuf_info *uarg,
|
|
bool success)
|
|
{
|
|
struct io_notif_data *nd = container_of(uarg, struct io_notif_data, uarg);
|
|
|
|
if (nd->zc_report) {
|
|
if (success && !nd->zc_used && skb)
|
|
WRITE_ONCE(nd->zc_used, true);
|
|
else if (!success && !nd->zc_copied)
|
|
WRITE_ONCE(nd->zc_copied, true);
|
|
}
|
|
io_tx_ubuf_callback(skb, uarg, success);
|
|
}
|
|
|
|
void io_notif_set_extended(struct io_kiocb *notif)
|
|
{
|
|
struct io_notif_data *nd = io_notif_to_data(notif);
|
|
|
|
if (nd->uarg.callback != io_tx_ubuf_callback_ext) {
|
|
nd->account_pages = 0;
|
|
nd->zc_report = false;
|
|
nd->zc_used = false;
|
|
nd->zc_copied = false;
|
|
nd->uarg.callback = io_tx_ubuf_callback_ext;
|
|
notif->io_task_work.func = io_notif_complete_tw_ext;
|
|
}
|
|
}
|
|
|
|
struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx)
|
|
__must_hold(&ctx->uring_lock)
|
|
{
|
|
struct io_kiocb *notif;
|
|
struct io_notif_data *nd;
|
|
|
|
if (unlikely(!io_alloc_req(ctx, ¬if)))
|
|
return NULL;
|
|
notif->opcode = IORING_OP_NOP;
|
|
notif->flags = 0;
|
|
notif->file = NULL;
|
|
notif->task = current;
|
|
io_get_task_refs(1);
|
|
notif->rsrc_node = NULL;
|
|
notif->io_task_work.func = io_req_task_complete;
|
|
|
|
nd = io_notif_to_data(notif);
|
|
nd->uarg.flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN;
|
|
nd->uarg.callback = io_tx_ubuf_callback;
|
|
refcount_set(&nd->uarg.refcnt, 1);
|
|
return notif;
|
|
}
|