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Date: Mon, 21 Nov 2022 12:46:40 -0700 From: Jens Axboe <axboe@...nel.dk> To: Stefan Roesch <shr@...kernel.io>, kernel-team@...com Cc: olivier@...llion01.com, netdev@...r.kernel.org, io-uring@...r.kernel.org, kuba@...nel.org Subject: Re: [PATCH v5 2/3] io_uring: add api to set / get napi configuration. On 11/21/22 12:14?PM, Stefan Roesch wrote: > +static int io_unregister_napi(struct io_ring_ctx *ctx, void __user *arg) > +{ > +#ifdef CONFIG_NET_RX_BUSY_POLL > + const struct io_uring_napi curr = { > + .busy_poll_to = ctx->napi_busy_poll_to, > + }; > + > + if (copy_to_user(arg, &curr, sizeof(curr))) > + return -EFAULT; > + > + WRITE_ONCE(ctx->napi_busy_poll_to, 0); > + return 0; > +#else > + return -EINVAL; > +#endif > +} Should probably check resv/pad here as well, maybe even the 'busy_poll_to' being zero? -- Jens Axboe
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