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io_uring/net: initalize msghdr->msg_inq to known value 

We can't currently tell if ->msg_inq was set when we ask for msg_get_inq,
initialize it to -1U so we can tell apart if it was set and there's
no data left, or if it just wasn't set at all by the protocol.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-05-17 12:18:13 -06:00
parent bf34e69793
commit 88fc8b8463
1 changed files with 4 additions and 2 deletions
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6
io_uring/net.c
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@ -785,6 +785,7 @@ retry_multishot:
min_ret = iov_iter_count(&kmsg->msg.msg_iter);
kmsg->msg.msg_get_inq = 1;
kmsg->msg.msg_inq = -1U;
if (req->flags & REQ_F_APOLL_MULTISHOT)
ret = io_recvmsg_multishot(sock, sr, kmsg, flags,
&mshot_finished);
@ -821,7 +822,7 @@ retry_multishot:
io_kbuf_recycle(req, issue_flags);
cflags = io_put_kbuf(req, issue_flags);
if (kmsg->msg.msg_inq)
if (kmsg->msg.msg_inq && kmsg->msg.msg_inq != -1U)
cflags |= IORING_CQE_F_SOCK_NONEMPTY;
if (!io_recv_finish(req, &ret, cflags, mshot_finished, issue_flags))
@ -882,6 +883,7 @@ retry_multishot:
if (unlikely(ret))
goto out_free;
msg.msg_inq = -1U;
msg.msg_flags = 0;
flags = sr->msg_flags;
@ -923,7 +925,7 @@ out_free:
io_kbuf_recycle(req, issue_flags);
cflags = io_put_kbuf(req, issue_flags);
if (msg.msg_inq)
if (msg.msg_inq && msg.msg_inq != -1U)
cflags |= IORING_CQE_F_SOCK_NONEMPTY;
if (!io_recv_finish(req, &ret, cflags, ret <= 0, issue_flags))