[4/5] io_uring/kbuf: pass in 'len' argument for buffer commit

Message ID	20240827152500.295643-5-axboe@kernel.dk (mailing list archive)
State	New
Headers	show Received: from mail-io1-f47.google.com (mail-io1-f47.google.com [209.85.166.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B89AE1C4EEA for <io-uring@vger.kernel.org>; Tue, 27 Aug 2024 15:25:08 +0000 (UTC) From: Jens Axboe <axboe@kernel.dk> To: io-uring@vger.kernel.org Cc: Jens Axboe <axboe@kernel.dk> Subject: [PATCH 4/5] io_uring/kbuf: pass in 'len' argument for buffer commit Date: Tue, 27 Aug 2024 09:23:08 -0600 Message-ID: <20240827152500.295643-5-axboe@kernel.dk> In-Reply-To: <20240827152500.295643-1-axboe@kernel.dk> References: <20240827152500.295643-1-axboe@kernel.dk> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Add support for incremental buffer consumption \| expand [PATCHSET,v4,0/5] Add support for incremental buffer consumption [1/5] io_uring/kbuf: add io_kbuf_commit() helper [2/5] io_uring/kbuf: move io_ring_head_to_buf() to kbuf.h [3/5] Revert "io_uring: Require zeroed sqe->len on provided-buffers send" [4/5] io_uring/kbuf: pass in 'len' argument for buffer commit [5/5] io_uring/kbuf: add support for incremental buffer consumption

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 80bb6e2374e9..1aca501efaf6 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -904,7 +904,7 @@ void io_req_defer_failed(struct io_kiocb *req, s32 res) lockdep_assert_held(&req->ctx->uring_lock); req_set_fail(req); - io_req_set_res(req, res, io_put_kbuf(req, IO_URING_F_UNLOCKED)); + io_req_set_res(req, res, io_put_kbuf(req, res, IO_URING_F_UNLOCKED)); if (def->fail) def->fail(req); io_req_complete_defer(req); diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c index 297c1d2c3c27..55d01861d8c5 100644 --- a/io_uring/kbuf.c +++ b/io_uring/kbuf.c @@ -70,7 +70,7 @@ bool io_kbuf_recycle_legacy(struct io_kiocb *req, unsigned issue_flags) return true; } -void __io_put_kbuf(struct io_kiocb *req, unsigned issue_flags) +void __io_put_kbuf(struct io_kiocb *req, int len, unsigned issue_flags) { /* * We can add this buffer back to two lists: @@ -88,12 +88,12 @@ void __io_put_kbuf(struct io_kiocb *req, unsigned issue_flags) struct io_ring_ctx *ctx = req->ctx; spin_lock(&ctx->completion_lock); - __io_put_kbuf_list(req, &ctx->io_buffers_comp); + __io_put_kbuf_list(req, len, &ctx->io_buffers_comp); spin_unlock(&ctx->completion_lock); } else { lockdep_assert_held(&req->ctx->uring_lock); - __io_put_kbuf_list(req, &req->ctx->io_buffers_cache); + __io_put_kbuf_list(req, len, &req->ctx->io_buffers_cache); } } @@ -165,7 +165,7 @@ static void __user *io_ring_buffer_select(struct io_kiocb *req, size_t *len, * the transfer completes (or if we get -EAGAIN and must poll of * retry). */ - io_kbuf_commit(req, bl, 1); + io_kbuf_commit(req, bl, *len, 1); req->buf_list = NULL; } return u64_to_user_ptr(buf->addr); @@ -291,7 +291,7 @@ int io_buffers_select(struct io_kiocb *req, struct buf_sel_arg *arg, */ if (ret > 0) { req->flags |= REQ_F_BUFFERS_COMMIT | REQ_F_BL_NO_RECYCLE; - io_kbuf_commit(req, bl, ret); + io_kbuf_commit(req, bl, arg->out_len, ret); } } else { ret = io_provided_buffers_select(req, &arg->out_len, bl, arg->iovs); diff --git a/io_uring/kbuf.h b/io_uring/kbuf.h index 4c34ff3144b9..b41e2a0a0505 100644 --- a/io_uring/kbuf.h +++ b/io_uring/kbuf.h @@ -77,7 +77,7 @@ int io_register_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg); int io_unregister_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg); int io_register_pbuf_status(struct io_ring_ctx *ctx, void __user *arg); -void __io_put_kbuf(struct io_kiocb *req, unsigned issue_flags); +void __io_put_kbuf(struct io_kiocb *req, int len, unsigned issue_flags); bool io_kbuf_recycle_legacy(struct io_kiocb *req, unsigned issue_flags); @@ -125,7 +125,7 @@ static inline bool io_kbuf_recycle(struct io_kiocb *req, unsigned issue_flags) #define io_ring_head_to_buf(br, head, mask) &(br)->bufs[(head) & (mask)] static inline void io_kbuf_commit(struct io_kiocb *req, - struct io_buffer_list *bl, int nr) + struct io_buffer_list *bl, int len, int nr) { if (unlikely(!(req->flags & REQ_F_BUFFERS_COMMIT))) return; @@ -133,22 +133,22 @@ static inline void io_kbuf_commit(struct io_kiocb *req, req->flags &= ~REQ_F_BUFFERS_COMMIT; } -static inline void __io_put_kbuf_ring(struct io_kiocb *req, int nr) +static inline void __io_put_kbuf_ring(struct io_kiocb *req, int len, int nr) { struct io_buffer_list *bl = req->buf_list; if (bl) { - io_kbuf_commit(req, bl, nr); + io_kbuf_commit(req, bl, len, nr); req->buf_index = bl->bgid; } req->flags &= ~REQ_F_BUFFER_RING; } -static inline void __io_put_kbuf_list(struct io_kiocb *req, +static inline void __io_put_kbuf_list(struct io_kiocb *req, int len, struct list_head *list) { if (req->flags & REQ_F_BUFFER_RING) { - __io_put_kbuf_ring(req, 1); + __io_put_kbuf_ring(req, len, 1); } else { req->buf_index = req->kbuf->bgid; list_add(&req->kbuf->list, list); @@ -163,11 +163,12 @@ static inline void io_kbuf_drop(struct io_kiocb *req) if (!(req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING))) return; - __io_put_kbuf_list(req, &req->ctx->io_buffers_comp); + /* len == 0 is fine here, non-ring will always drop all of it */ + __io_put_kbuf_list(req, 0, &req->ctx->io_buffers_comp); } -static inline unsigned int __io_put_kbufs(struct io_kiocb *req, int nbufs, - unsigned issue_flags) +static inline unsigned int __io_put_kbufs(struct io_kiocb *req, int len, + int nbufs, unsigned issue_flags) { unsigned int ret; @@ -176,21 +177,21 @@ static inline unsigned int __io_put_kbufs(struct io_kiocb *req, int nbufs, ret = IORING_CQE_F_BUFFER | (req->buf_index << IORING_CQE_BUFFER_SHIFT); if (req->flags & REQ_F_BUFFER_RING) - __io_put_kbuf_ring(req, nbufs); + __io_put_kbuf_ring(req, len, nbufs); else - __io_put_kbuf(req, issue_flags); + __io_put_kbuf(req, len, issue_flags); return ret; } -static inline unsigned int io_put_kbuf(struct io_kiocb *req, +static inline unsigned int io_put_kbuf(struct io_kiocb *req, int len, unsigned issue_flags) { - return __io_put_kbufs(req, 1, issue_flags); + return __io_put_kbufs(req, len, 1, issue_flags); } -static inline unsigned int io_put_kbufs(struct io_kiocb *req, int nbufs, - unsigned issue_flags) +static inline unsigned int io_put_kbufs(struct io_kiocb *req, int len, + int nbufs, unsigned issue_flags) { - return __io_put_kbufs(req, nbufs, issue_flags); + return __io_put_kbufs(req, len, nbufs, issue_flags); } #endif diff --git a/io_uring/net.c b/io_uring/net.c index cc81bcacdc1b..f10f5a22d66a 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -497,11 +497,11 @@ static inline bool io_send_finish(struct io_kiocb *req, int *ret, unsigned int cflags; if (!(sr->flags & IORING_RECVSEND_BUNDLE)) { - cflags = io_put_kbuf(req, issue_flags); + cflags = io_put_kbuf(req, *ret, issue_flags); goto finish; } - cflags = io_put_kbufs(req, io_bundle_nbufs(kmsg, *ret), issue_flags); + cflags = io_put_kbufs(req, *ret, io_bundle_nbufs(kmsg, *ret), issue_flags); if (bundle_finished || req->flags & REQ_F_BL_EMPTY) goto finish; @@ -842,13 +842,13 @@ static inline bool io_recv_finish(struct io_kiocb *req, int *ret, cflags |= IORING_CQE_F_SOCK_NONEMPTY; if (sr->flags & IORING_RECVSEND_BUNDLE) { - cflags |= io_put_kbufs(req, io_bundle_nbufs(kmsg, *ret), + cflags |= io_put_kbufs(req, *ret, io_bundle_nbufs(kmsg, *ret), issue_flags); /* bundle with no more immediate buffers, we're done */ if (req->flags & REQ_F_BL_EMPTY) goto finish; } else { - cflags |= io_put_kbuf(req, issue_flags); + cflags |= io_put_kbuf(req, *ret, issue_flags); } /* diff --git a/io_uring/rw.c b/io_uring/rw.c index c004d21e2f12..f5e0694538b9 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -511,7 +511,7 @@ void io_req_rw_complete(struct io_kiocb *req, struct io_tw_state *ts) io_req_io_end(req); if (req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING)) - req->cqe.flags |= io_put_kbuf(req, 0); + req->cqe.flags |= io_put_kbuf(req, req->cqe.res, 0); io_req_rw_cleanup(req, 0); io_req_task_complete(req, ts); @@ -593,7 +593,7 @@ static int kiocb_done(struct io_kiocb *req, ssize_t ret, */ io_req_io_end(req); io_req_set_res(req, final_ret, - io_put_kbuf(req, issue_flags)); + io_put_kbuf(req, ret, issue_flags)); io_req_rw_cleanup(req, issue_flags); return IOU_OK; } @@ -975,7 +975,7 @@ int io_read_mshot(struct io_kiocb *req, unsigned int issue_flags) * Put our buffer and post a CQE. If we fail to post a CQE, then * jump to the termination path. This request is then done. */ - cflags = io_put_kbuf(req, issue_flags); + cflags = io_put_kbuf(req, ret, issue_flags); rw->len = 0; /* similarly to above, reset len to 0 */ if (io_req_post_cqe(req, ret, cflags | IORING_CQE_F_MORE)) { @@ -1167,7 +1167,7 @@ int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin) if (!smp_load_acquire(&req->iopoll_completed)) break; nr_events++; - req->cqe.flags = io_put_kbuf(req, 0); + req->cqe.flags = io_put_kbuf(req, req->cqe.res, 0); if (req->opcode != IORING_OP_URING_CMD) io_req_rw_cleanup(req, 0); }

[4/5] io_uring/kbuf: pass in 'len' argument for buffer commit

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Patch