1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/nospec.h>
10 #define IO_NOTIF_UBUF_FLAGS (SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN)
11 #define IO_NOTIF_SPLICE_BATCH 32
13 struct io_notif_data {
15 struct ubuf_info uarg;
16 unsigned long account_pages;
22 struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
23 void io_notif_set_extended(struct io_kiocb *notif);
25 static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
27 return io_kiocb_to_cmd(notif, struct io_notif_data);
30 static inline void io_notif_flush(struct io_kiocb *notif)
31 __must_hold(¬if->ctx->uring_lock)
33 struct io_notif_data *nd = io_notif_to_data(notif);
35 /* drop slot's master ref */
36 if (refcount_dec_and_test(&nd->uarg.refcnt))
37 __io_req_task_work_add(notif, IOU_F_TWQ_LAZY_WAKE);
40 static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)
42 struct io_ring_ctx *ctx = notif->ctx;
43 struct io_notif_data *nd = io_notif_to_data(notif);
44 unsigned nr_pages = (len >> PAGE_SHIFT) + 2;
48 ret = __io_account_mem(ctx->user, nr_pages);
51 nd->account_pages += nr_pages;