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io_uring/net: unify *mshot_prep calls with compat

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Instead of duplicating a io_recvmsg_mshot_prep() call in the compat
path, let the common code handle it. For that, copy necessary compat
fields into struct user_msghdr. Note, it zeroes user_msghdr to be on the
safe side as compat is not that interesting and overhead shouldn't be
high.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/94e62386dec570f83b4a4270a46ac60bc415fb71.1740569495.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2025-02-26 11:41:20 +00:00 committed by Jens Axboe
parent 0c623f4899
commit 51e158d405
1 changed files with 7 additions and 7 deletions
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14
io_uring/net.c
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@ -714,20 +714,20 @@ static int io_recvmsg_copy_hdr(struct io_kiocb *req,
iomsg->msg.msg_name = &iomsg->addr;
iomsg->msg.msg_iter.nr_segs = 0;
#ifdef CONFIG_COMPAT
if (io_is_compat(req->ctx)) {
#ifdef CONFIG_COMPAT
struct compat_msghdr cmsg;
ret = io_compat_msg_copy_hdr(req, iomsg, &cmsg, ITER_DEST,
&iomsg->uaddr);
if (unlikely(ret))
return ret;
return io_recvmsg_mshot_prep(req, iomsg, cmsg.msg_namelen,
cmsg.msg_controllen);
}
memset(&msg, 0, sizeof(msg));
msg.msg_namelen = cmsg.msg_namelen;
msg.msg_controllen = cmsg.msg_controllen;
#endif
} else {
ret = io_msg_copy_hdr(req, iomsg, &msg, ITER_DEST, &iomsg->uaddr);
}
if (unlikely(ret))
return ret;
return io_recvmsg_mshot_prep(req, iomsg, msg.msg_namelen,