1 #include <linux/kernel.h>
2 #include <linux/errno.h>
3 #include <linux/file.h>
4 #include <linux/slab.h>
6 #include <linux/io_uring.h>
12 static void io_notif_complete_tw_ext(struct io_kiocb *notif, bool *locked)
14 struct io_notif_data *nd = io_notif_to_data(notif);
15 struct io_ring_ctx *ctx = notif->ctx;
17 if (nd->zc_report && (nd->zc_copied || !nd->zc_used))
18 notif->cqe.res |= IORING_NOTIF_USAGE_ZC_COPIED;
20 if (nd->account_pages && ctx->user) {
21 __io_unaccount_mem(ctx->user, nd->account_pages);
22 nd->account_pages = 0;
24 io_req_task_complete(notif, locked);
27 static void io_tx_ubuf_callback(struct sk_buff *skb, struct ubuf_info *uarg,
30 struct io_notif_data *nd = container_of(uarg, struct io_notif_data, uarg);
31 struct io_kiocb *notif = cmd_to_io_kiocb(nd);
33 if (refcount_dec_and_test(&uarg->refcnt))
34 io_req_task_work_add(notif);
37 static void io_tx_ubuf_callback_ext(struct sk_buff *skb, struct ubuf_info *uarg,
40 struct io_notif_data *nd = container_of(uarg, struct io_notif_data, uarg);
43 if (success && !nd->zc_used && skb)
44 WRITE_ONCE(nd->zc_used, true);
45 else if (!success && !nd->zc_copied)
46 WRITE_ONCE(nd->zc_copied, true);
48 io_tx_ubuf_callback(skb, uarg, success);
51 void io_notif_set_extended(struct io_kiocb *notif)
53 struct io_notif_data *nd = io_notif_to_data(notif);
55 if (nd->uarg.callback != io_tx_ubuf_callback_ext) {
56 nd->account_pages = 0;
57 nd->zc_report = false;
59 nd->zc_copied = false;
60 nd->uarg.callback = io_tx_ubuf_callback_ext;
61 notif->io_task_work.func = io_notif_complete_tw_ext;
65 struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx)
66 __must_hold(&ctx->uring_lock)
68 struct io_kiocb *notif;
69 struct io_notif_data *nd;
71 if (unlikely(!io_alloc_req(ctx, ¬if)))
73 notif->opcode = IORING_OP_NOP;
76 notif->task = current;
78 notif->rsrc_node = NULL;
79 notif->io_task_work.func = io_req_task_complete;
81 nd = io_notif_to_data(notif);
82 nd->uarg.flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN;
83 nd->uarg.callback = io_tx_ubuf_callback;
84 refcount_set(&nd->uarg.refcnt, 1);