* [PATCH 5.9 0/3] send/recv msghdr init cleanups
@ 2020-07-12 17:41 Pavel Begunkov
2020-07-12 17:41 ` [PATCH 1/3] io_uring: rename sr->msg into umsg Pavel Begunkov
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Pavel Begunkov @ 2020-07-12 17:41 UTC (permalink / raw)
To: Jens Axboe, io-uring
A follow-up for the "msg_name" fix, cleaning it up and
deduplicating error prone parts.
Pavel Begunkov (3):
io_uring: rename __user *msg into umsg
io_uring: use more specific type in rcv/snd msg cp
io_uring: extract io_sendmsg_copy_hdr()
fs/io_uring.c | 86 +++++++++++++++++++++++++--------------------------
1 file changed, 43 insertions(+), 43 deletions(-)
--
2.24.0
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 1/3] io_uring: rename sr->msg into umsg
2020-07-12 17:41 [PATCH 5.9 0/3] send/recv msghdr init cleanups Pavel Begunkov
@ 2020-07-12 17:41 ` Pavel Begunkov
2020-07-12 17:41 ` [PATCH 2/3] io_uring: use more specific type in rcv/snd msg cp Pavel Begunkov
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Pavel Begunkov @ 2020-07-12 17:41 UTC (permalink / raw)
To: Jens Axboe, io-uring
Every second field in send/recv is called msg, make it a bit more
understandable by renaming ->msg, which is a user provided ptr,
to ->umsg.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index c03e953751cc..2cfcf111f58f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -414,7 +414,7 @@ struct io_connect {
struct io_sr_msg {
struct file *file;
union {
- struct user_msghdr __user *msg;
+ struct user_msghdr __user *umsg;
void __user *buf;
};
int msg_flags;
@@ -3899,7 +3899,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
return -EINVAL;
sr->msg_flags = READ_ONCE(sqe->msg_flags);
- sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
+ sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
#ifdef CONFIG_COMPAT
@@ -3915,7 +3915,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
io->msg.msg.msg_name = &io->msg.addr;
io->msg.iov = io->msg.fast_iov;
- ret = sendmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags,
+ ret = sendmsg_copy_msghdr(&io->msg.msg, sr->umsg, sr->msg_flags,
&io->msg.iov);
if (!ret)
req->flags |= REQ_F_NEED_CLEANUP;
@@ -3948,7 +3948,7 @@ static int io_sendmsg(struct io_kiocb *req, bool force_nonblock,
kmsg->msg.msg_name = &io.msg.addr;
io.msg.iov = io.msg.fast_iov;
- ret = sendmsg_copy_msghdr(&io.msg.msg, sr->msg,
+ ret = sendmsg_copy_msghdr(&io.msg.msg, sr->umsg,
sr->msg_flags, &io.msg.iov);
if (ret)
return ret;
@@ -4026,8 +4026,8 @@ static int __io_recvmsg_copy_hdr(struct io_kiocb *req, struct io_async_ctx *io)
size_t iov_len;
int ret;
- ret = __copy_msghdr_from_user(&io->msg.msg, sr->msg, &io->msg.uaddr,
- &uiov, &iov_len);
+ ret = __copy_msghdr_from_user(&io->msg.msg, sr->umsg,
+ &io->msg.uaddr, &uiov, &iov_len);
if (ret)
return ret;
@@ -4061,7 +4061,7 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
compat_size_t len;
int ret;
- msg_compat = (struct compat_msghdr __user *) sr->msg;
+ msg_compat = (struct compat_msghdr __user *) sr->umsg;
ret = __get_compat_msghdr(&io->msg.msg, msg_compat, &io->msg.uaddr,
&ptr, &len);
if (ret)
@@ -4138,7 +4138,7 @@ static int io_recvmsg_prep(struct io_kiocb *req,
return -EINVAL;
sr->msg_flags = READ_ONCE(sqe->msg_flags);
- sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
+ sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
sr->bgid = READ_ONCE(sqe->buf_group);
@@ -4203,7 +4203,7 @@ static int io_recvmsg(struct io_kiocb *req, bool force_nonblock,
else if (force_nonblock)
flags |= MSG_DONTWAIT;
- ret = __sys_recvmsg_sock(sock, &kmsg->msg, req->sr_msg.msg,
+ ret = __sys_recvmsg_sock(sock, &kmsg->msg, req->sr_msg.umsg,
kmsg->uaddr, flags);
if (force_nonblock && ret == -EAGAIN)
return io_setup_async_msg(req, kmsg);
--
2.24.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/3] io_uring: use more specific type in rcv/snd msg cp
2020-07-12 17:41 [PATCH 5.9 0/3] send/recv msghdr init cleanups Pavel Begunkov
2020-07-12 17:41 ` [PATCH 1/3] io_uring: rename sr->msg into umsg Pavel Begunkov
@ 2020-07-12 17:41 ` Pavel Begunkov
2020-07-12 17:41 ` [PATCH 3/3] io_uring: extract io_sendmsg_copy_hdr() Pavel Begunkov
2020-07-12 20:26 ` [PATCH 5.9 0/3] send/recv msghdr init cleanups Jens Axboe
3 siblings, 0 replies; 5+ messages in thread
From: Pavel Begunkov @ 2020-07-12 17:41 UTC (permalink / raw)
To: Jens Axboe, io-uring
send/recv msghdr initialisation works with struct io_async_msghdr, but
pulls the whole struct io_async_ctx for no reason. That complicates it
with composite accessing, e.g. io->msg.
Use and pass the most specific type, which is struct io_async_msghdr.
It is the larget field in union io_async_ctx and doesn't save stack
space, but looks clearer.
The most of the changes are replacing "io->msg." with "iomsg->"
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 63 +++++++++++++++++++++++++--------------------------
1 file changed, 31 insertions(+), 32 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 2cfcf111f58f..b496aebd6285 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3931,7 +3931,7 @@ static int io_sendmsg(struct io_kiocb *req, bool force_nonblock,
sock = sock_from_file(req->file, &ret);
if (sock) {
- struct io_async_ctx io;
+ struct io_async_msghdr iomsg;
unsigned flags;
if (req->io) {
@@ -3944,14 +3944,13 @@ static int io_sendmsg(struct io_kiocb *req, bool force_nonblock,
} else {
struct io_sr_msg *sr = &req->sr_msg;
- kmsg = &io.msg;
- kmsg->msg.msg_name = &io.msg.addr;
-
- io.msg.iov = io.msg.fast_iov;
- ret = sendmsg_copy_msghdr(&io.msg.msg, sr->umsg,
- sr->msg_flags, &io.msg.iov);
+ iomsg.msg.msg_name = &iomsg.addr;
+ iomsg.iov = iomsg.fast_iov;
+ ret = sendmsg_copy_msghdr(&iomsg.msg, sr->umsg,
+ sr->msg_flags, &iomsg.iov);
if (ret)
return ret;
+ kmsg = &iomsg;
}
flags = req->sr_msg.msg_flags;
@@ -4019,30 +4018,31 @@ static int io_send(struct io_kiocb *req, bool force_nonblock,
return 0;
}
-static int __io_recvmsg_copy_hdr(struct io_kiocb *req, struct io_async_ctx *io)
+static int __io_recvmsg_copy_hdr(struct io_kiocb *req,
+ struct io_async_msghdr *iomsg)
{
struct io_sr_msg *sr = &req->sr_msg;
struct iovec __user *uiov;
size_t iov_len;
int ret;
- ret = __copy_msghdr_from_user(&io->msg.msg, sr->umsg,
- &io->msg.uaddr, &uiov, &iov_len);
+ ret = __copy_msghdr_from_user(&iomsg->msg, sr->umsg,
+ &iomsg->uaddr, &uiov, &iov_len);
if (ret)
return ret;
if (req->flags & REQ_F_BUFFER_SELECT) {
if (iov_len > 1)
return -EINVAL;
- if (copy_from_user(io->msg.iov, uiov, sizeof(*uiov)))
+ if (copy_from_user(iomsg->iov, uiov, sizeof(*uiov)))
return -EFAULT;
- sr->len = io->msg.iov[0].iov_len;
- iov_iter_init(&io->msg.msg.msg_iter, READ, io->msg.iov, 1,
+ sr->len = iomsg->iov[0].iov_len;
+ iov_iter_init(&iomsg->msg.msg_iter, READ, iomsg->iov, 1,
sr->len);
- io->msg.iov = NULL;
+ iomsg->iov = NULL;
} else {
ret = import_iovec(READ, uiov, iov_len, UIO_FASTIOV,
- &io->msg.iov, &io->msg.msg.msg_iter);
+ &iomsg->iov, &iomsg->msg.msg_iter);
if (ret > 0)
ret = 0;
}
@@ -4052,7 +4052,7 @@ static int __io_recvmsg_copy_hdr(struct io_kiocb *req, struct io_async_ctx *io)
#ifdef CONFIG_COMPAT
static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
- struct io_async_ctx *io)
+ struct io_async_msghdr *iomsg)
{
struct compat_msghdr __user *msg_compat;
struct io_sr_msg *sr = &req->sr_msg;
@@ -4062,7 +4062,7 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
int ret;
msg_compat = (struct compat_msghdr __user *) sr->umsg;
- ret = __get_compat_msghdr(&io->msg.msg, msg_compat, &io->msg.uaddr,
+ ret = __get_compat_msghdr(&iomsg->msg, msg_compat, &iomsg->uaddr,
&ptr, &len);
if (ret)
return ret;
@@ -4079,12 +4079,12 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
return -EFAULT;
if (clen < 0)
return -EINVAL;
- sr->len = io->msg.iov[0].iov_len;
- io->msg.iov = NULL;
+ sr->len = iomsg->iov[0].iov_len;
+ iomsg->iov = NULL;
} else {
ret = compat_import_iovec(READ, uiov, len, UIO_FASTIOV,
- &io->msg.iov,
- &io->msg.msg.msg_iter);
+ &iomsg->iov,
+ &iomsg->msg.msg_iter);
if (ret < 0)
return ret;
}
@@ -4093,17 +4093,18 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
}
#endif
-static int io_recvmsg_copy_hdr(struct io_kiocb *req, struct io_async_ctx *io)
+static int io_recvmsg_copy_hdr(struct io_kiocb *req,
+ struct io_async_msghdr *iomsg)
{
- io->msg.msg.msg_name = &io->msg.addr;
- io->msg.iov = io->msg.fast_iov;
+ iomsg->msg.msg_name = &iomsg->addr;
+ iomsg->iov = iomsg->fast_iov;
#ifdef CONFIG_COMPAT
if (req->ctx->compat)
- return __io_compat_recvmsg_copy_hdr(req, io);
+ return __io_compat_recvmsg_copy_hdr(req, iomsg);
#endif
- return __io_recvmsg_copy_hdr(req, io);
+ return __io_recvmsg_copy_hdr(req, iomsg);
}
static struct io_buffer *io_recv_buffer_select(struct io_kiocb *req,
@@ -4153,7 +4154,7 @@ static int io_recvmsg_prep(struct io_kiocb *req,
if (req->flags & REQ_F_NEED_CLEANUP)
return 0;
- ret = io_recvmsg_copy_hdr(req, io);
+ ret = io_recvmsg_copy_hdr(req, &io->msg);
if (!ret)
req->flags |= REQ_F_NEED_CLEANUP;
return ret;
@@ -4169,7 +4170,7 @@ static int io_recvmsg(struct io_kiocb *req, bool force_nonblock,
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_buffer *kbuf;
- struct io_async_ctx io;
+ struct io_async_msghdr iomsg;
unsigned flags;
if (req->io) {
@@ -4180,12 +4181,10 @@ static int io_recvmsg(struct io_kiocb *req, bool force_nonblock,
kmsg->iov = kmsg->fast_iov;
kmsg->msg.msg_iter.iov = kmsg->iov;
} else {
- kmsg = &io.msg;
- kmsg->msg.msg_name = &io.msg.addr;
-
- ret = io_recvmsg_copy_hdr(req, &io);
+ ret = io_recvmsg_copy_hdr(req, &iomsg);
if (ret)
return ret;
+ kmsg = &iomsg;
}
kbuf = io_recv_buffer_select(req, &cflags, !force_nonblock);
--
2.24.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 3/3] io_uring: extract io_sendmsg_copy_hdr()
2020-07-12 17:41 [PATCH 5.9 0/3] send/recv msghdr init cleanups Pavel Begunkov
2020-07-12 17:41 ` [PATCH 1/3] io_uring: rename sr->msg into umsg Pavel Begunkov
2020-07-12 17:41 ` [PATCH 2/3] io_uring: use more specific type in rcv/snd msg cp Pavel Begunkov
@ 2020-07-12 17:41 ` Pavel Begunkov
2020-07-12 20:26 ` [PATCH 5.9 0/3] send/recv msghdr init cleanups Jens Axboe
3 siblings, 0 replies; 5+ messages in thread
From: Pavel Begunkov @ 2020-07-12 17:41 UTC (permalink / raw)
To: Jens Axboe, io-uring
Don't repeat send msg initialisation code, it's error prone.
Extract and use a helper function.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index b496aebd6285..d87751f7b5ba 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3889,6 +3889,15 @@ static int io_setup_async_msg(struct io_kiocb *req,
return -EAGAIN;
}
+static int io_sendmsg_copy_hdr(struct io_kiocb *req,
+ struct io_async_msghdr *iomsg)
+{
+ iomsg->iov = iomsg->fast_iov;
+ iomsg->msg.msg_name = &iomsg->addr;
+ return sendmsg_copy_msghdr(&iomsg->msg, req->sr_msg.umsg,
+ req->sr_msg.msg_flags, &iomsg->iov);
+}
+
static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_sr_msg *sr = &req->sr_msg;
@@ -3913,10 +3922,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (req->flags & REQ_F_NEED_CLEANUP)
return 0;
- io->msg.msg.msg_name = &io->msg.addr;
- io->msg.iov = io->msg.fast_iov;
- ret = sendmsg_copy_msghdr(&io->msg.msg, sr->umsg, sr->msg_flags,
- &io->msg.iov);
+ ret = io_sendmsg_copy_hdr(req, &io->msg);
if (!ret)
req->flags |= REQ_F_NEED_CLEANUP;
return ret;
@@ -3942,12 +3948,7 @@ static int io_sendmsg(struct io_kiocb *req, bool force_nonblock,
kmsg->iov = kmsg->fast_iov;
kmsg->msg.msg_iter.iov = kmsg->iov;
} else {
- struct io_sr_msg *sr = &req->sr_msg;
-
- iomsg.msg.msg_name = &iomsg.addr;
- iomsg.iov = iomsg.fast_iov;
- ret = sendmsg_copy_msghdr(&iomsg.msg, sr->umsg,
- sr->msg_flags, &iomsg.iov);
+ ret = io_sendmsg_copy_hdr(req, &iomsg);
if (ret)
return ret;
kmsg = &iomsg;
--
2.24.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 5.9 0/3] send/recv msghdr init cleanups
2020-07-12 17:41 [PATCH 5.9 0/3] send/recv msghdr init cleanups Pavel Begunkov
` (2 preceding siblings ...)
2020-07-12 17:41 ` [PATCH 3/3] io_uring: extract io_sendmsg_copy_hdr() Pavel Begunkov
@ 2020-07-12 20:26 ` Jens Axboe
3 siblings, 0 replies; 5+ messages in thread
From: Jens Axboe @ 2020-07-12 20:26 UTC (permalink / raw)
To: Pavel Begunkov, io-uring
On 7/12/20 11:41 AM, Pavel Begunkov wrote:
> A follow-up for the "msg_name" fix, cleaning it up and
> deduplicating error prone parts.
Thanks, applied.
--
Jens Axboe
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-07-12 20:26 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-12 17:41 [PATCH 5.9 0/3] send/recv msghdr init cleanups Pavel Begunkov
2020-07-12 17:41 ` [PATCH 1/3] io_uring: rename sr->msg into umsg Pavel Begunkov
2020-07-12 17:41 ` [PATCH 2/3] io_uring: use more specific type in rcv/snd msg cp Pavel Begunkov
2020-07-12 17:41 ` [PATCH 3/3] io_uring: extract io_sendmsg_copy_hdr() Pavel Begunkov
2020-07-12 20:26 ` [PATCH 5.9 0/3] send/recv msghdr init cleanups Jens Axboe
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.