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From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 05/11] io_uring: deferred send/recvmsg should assign iov
Date: Tue, 10 Dec 2019 08:57:36 -0700
Message-ID: <20191210155742.5844-6-axboe@kernel.dk> (raw)
In-Reply-To: <20191210155742.5844-1-axboe@kernel.dk>

Don't just assign it from the main call path, that can miss the case
when we're called from issue deferral.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 1e1e80d48145..a0ed20e097d9 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2026,6 +2026,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, struct io_async_ctx *io)
 
 	flags = READ_ONCE(sqe->msg_flags);
 	msg = (struct user_msghdr __user *)(unsigned long) READ_ONCE(sqe->addr);
+	io->msg.iov = io->msg.fast_iov;
 	return sendmsg_copy_msghdr(&io->msg.msg, msg, flags, &io->msg.iov);
 #else
 	return 0;
@@ -2061,7 +2062,6 @@ static int io_sendmsg(struct io_kiocb *req, const struct io_uring_sqe *sqe,
 		} else {
 			kmsg = &io.msg.msg;
 			kmsg->msg_name = &addr;
-			io.msg.iov = io.msg.fast_iov;
 			ret = io_sendmsg_prep(req, &io);
 			if (ret)
 				goto out;
@@ -2104,6 +2104,7 @@ static int io_recvmsg_prep(struct io_kiocb *req, struct io_async_ctx *io)
 
 	flags = READ_ONCE(sqe->msg_flags);
 	msg = (struct user_msghdr __user *)(unsigned long) READ_ONCE(sqe->addr);
+	io->msg.iov = io->msg.fast_iov;
 	return recvmsg_copy_msghdr(&io->msg.msg, msg, flags, &io->msg.uaddr,
 					&io->msg.iov);
 #else
@@ -2143,7 +2144,6 @@ static int io_recvmsg(struct io_kiocb *req, const struct io_uring_sqe *sqe,
 		} else {
 			kmsg = &io.msg.msg;
 			kmsg->msg_name = &addr;
-			io.msg.iov = io.msg.fast_iov;
 			ret = io_recvmsg_prep(req, &io);
 			if (ret)
 				goto out;
-- 
2.24.0


  parent reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-10 15:57 [PATCHSET 0/11] io_uring improvements/fixes for 5.5-rc Jens Axboe
2019-12-10 15:57 ` [PATCH 01/11] io_uring: allow unbreakable links Jens Axboe
2019-12-10 21:10   ` Pavel Begunkov
2019-12-10 21:12     ` Jens Axboe
2019-12-10 21:28       ` Pavel Begunkov
2019-12-10 22:17         ` Jens Axboe
2019-12-10 15:57 ` [PATCH 02/11] io-wq: remove worker->wait waitqueue Jens Axboe
2019-12-10 15:57 ` [PATCH 03/11] io-wq: briefly spin for new work after finishing work Jens Axboe
2019-12-10 15:57 ` [PATCH 04/11] io_uring: sqthread should grab ctx->uring_lock for submissions Jens Axboe
2019-12-10 15:57 ` Jens Axboe [this message]
2019-12-10 15:57 ` [PATCH 06/11] io_uring: don't dynamically allocate poll data Jens Axboe
2019-12-10 15:57 ` [PATCH 07/11] io_uring: use atomic_t for refcounts Jens Axboe
2019-12-10 22:04   ` Jann Horn
2019-12-10 22:21     ` Jens Axboe
2019-12-10 22:46       ` Kees Cook
2019-12-10 22:55         ` Jens Axboe
2019-12-11 10:20           ` Will Deacon
2019-12-11 16:56             ` Kees Cook
2019-12-11 17:00               ` Jens Axboe
2019-12-10 15:57 ` [PATCH 08/11] io_uring: run next sqe inline if possible Jens Axboe
2019-12-10 15:57 ` [PATCH 09/11] io_uring: only hash regular files for async work execution Jens Axboe
2019-12-10 15:57 ` [PATCH 10/11] net: make socket read/write_iter() honor IOCB_NOWAIT Jens Axboe
2019-12-10 19:37   ` David Miller
2019-12-10 20:43     ` Jens Axboe
2019-12-10 15:57 ` [PATCH 11/11] io_uring: add sockets to list of files that support non-blocking issue Jens Axboe

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