| Message ID | d6c8c90f-bf0b-b310-2737-27d3741f2043@sberdevices.ru (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vsock: MSG_ZEROCOPY flag support | expand |
On Mon, Feb 06, 2023 at 06:55:46AM +0000, Arseniy Krasnov wrote: >This feature totally depends on transport, so if transport doesn't >support it, return error. > >Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru> >--- > include/net/af_vsock.h | 2 ++ > net/vmw_vsock/af_vsock.c | 7 +++++++ > 2 files changed, 9 insertions(+) > >diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h >index 568a87c5e0d0..96d829004c81 100644 >--- a/include/net/af_vsock.h >+++ b/include/net/af_vsock.h >@@ -173,6 +173,8 @@ struct vsock_transport { > > /* Addressing. */ > u32 (*get_local_cid)(void); >+ LGTM, just add comment here for a new section following what we did for other callaback, e.g.: /* Zero-copy. */ >+ bool (*msgzerocopy_allow)(void); > }; > > /**** CORE ****/ >diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c >index f752b30b71d6..fb0fcb390113 100644 >--- a/net/vmw_vsock/af_vsock.c >+++ b/net/vmw_vsock/af_vsock.c >@@ -1788,6 +1788,13 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg, > goto out; > } > >+ if (msg->msg_flags & MSG_ZEROCOPY && >+ (!transport->msgzerocopy_allow || >+ !transport->msgzerocopy_allow())) { >+ err = -EOPNOTSUPP; >+ goto out; >+ } >+ > /* Wait for room in the produce queue to enqueue our user's data. */ > timeout = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); > >-- >2.25.1
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h index 568a87c5e0d0..96d829004c81 100644 --- a/include/net/af_vsock.h +++ b/include/net/af_vsock.h @@ -173,6 +173,8 @@ struct vsock_transport { /* Addressing. */ u32 (*get_local_cid)(void); + + bool (*msgzerocopy_allow)(void); }; /**** CORE ****/ diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index f752b30b71d6..fb0fcb390113 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1788,6 +1788,13 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg, goto out; } + if (msg->msg_flags & MSG_ZEROCOPY && + (!transport->msgzerocopy_allow || + !transport->msgzerocopy_allow())) { + err = -EOPNOTSUPP; + goto out; + } + /* Wait for room in the produce queue to enqueue our user's data. */ timeout = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
This feature totally depends on transport, so if transport doesn't support it, return error. Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru> --- include/net/af_vsock.h | 2 ++ net/vmw_vsock/af_vsock.c | 7 +++++++ 2 files changed, 9 insertions(+)