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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-09-21 12:17:50 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-09-21 13:15:02 -0600 |
| commit | 6ae61b7aa2c758ce07347ebfa9c79b6f208098d5 (patch) | |
| tree | 391404b215bf20c6ad86275d9a0f782b9a6e82d1 /io_uring/net.c | |
| parent | 5693bcce892d7b8b15a7a92b011d3d40a023b53c (diff) | |
| download | lwn-6ae61b7aa2c758ce07347ebfa9c79b6f208098d5.tar.gz lwn-6ae61b7aa2c758ce07347ebfa9c79b6f208098d5.zip | |
io_uring/net: refactor io_setup_async_addr
Instead of passing the right address into io_setup_async_addr() only
specify local on-stack storage and let the function infer where to grab
it from. It optimises out one local variable we have to deal with.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/6bfa9ab810d776853eb26ed59301e2536c3a5471.1663668091.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/net.c')
| -rw-r--r-- | io_uring/net.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/io_uring/net.c b/io_uring/net.c index 8d90f8eeb2d0..021ca2edf44a 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -196,17 +196,18 @@ int io_sendzc_prep_async(struct io_kiocb *req) } static int io_setup_async_addr(struct io_kiocb *req, - struct sockaddr_storage *addr, + struct sockaddr_storage *addr_storage, unsigned int issue_flags) { + struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); struct io_async_msghdr *io; - if (!addr || req_has_async_data(req)) + if (!sr->addr || req_has_async_data(req)) return -EAGAIN; io = io_msg_alloc_async(req, issue_flags); if (!io) return -ENOMEM; - memcpy(&io->addr, addr, sizeof(io->addr)); + memcpy(&io->addr, addr_storage, sizeof(io->addr)); return -EAGAIN; } @@ -1000,7 +1001,7 @@ static int io_sg_from_iter(struct sock *sk, struct sk_buff *skb, int io_sendzc(struct io_kiocb *req, unsigned int issue_flags) { - struct sockaddr_storage __address, *addr = NULL; + struct sockaddr_storage __address; struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); struct msghdr msg; struct iovec iov; @@ -1021,20 +1022,19 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags) if (req_has_async_data(req)) { struct io_async_msghdr *io = req->async_data; - msg.msg_name = addr = &io->addr; + msg.msg_name = &io->addr; } else { ret = move_addr_to_kernel(zc->addr, zc->addr_len, &__address); if (unlikely(ret < 0)) return ret; msg.msg_name = (struct sockaddr *)&__address; - addr = &__address; } msg.msg_namelen = zc->addr_len; } if (!(req->flags & REQ_F_POLLED) && (zc->flags & IORING_RECVSEND_POLL_FIRST)) - return io_setup_async_addr(req, addr, issue_flags); + return io_setup_async_addr(req, &__address, issue_flags); if (zc->flags & IORING_RECVSEND_FIXED_BUF) { ret = io_import_fixed(WRITE, &msg.msg_iter, req->imu, @@ -1065,14 +1065,14 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags) if (unlikely(ret < min_ret)) { if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) - return io_setup_async_addr(req, addr, issue_flags); + return io_setup_async_addr(req, &__address, issue_flags); if (ret > 0 && io_net_retry(sock, msg.msg_flags)) { zc->len -= ret; zc->buf += ret; zc->done_io += ret; req->flags |= REQ_F_PARTIAL_IO; - return io_setup_async_addr(req, addr, issue_flags); + return io_setup_async_addr(req, &__address, issue_flags); } if (ret < 0 && !zc->done_io) zc->notif->flags |= REQ_F_CQE_SKIP; |