[RFC PATCH 2/4] net: add uring_cmd callback to UDP
Breno Leitao <[email protected]>
| Newsgroups | org.kernel.vger.dccp,dev.linux.lists.mptcp,org.kernel.vger.io-uring,org.kernel.vger.linux-kernel,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
This is the implementation of uring_cmd for the udp protocol. It basically encompasses SOCKET_URING_OP_SIOCOUTQ and SOCKET_URING_OP_SIOCINQ, which is similar to the SIOCOUTQ and SIOCINQ ioctls. The return value is exactly the same as the regular ioctl (udp_ioctl()). Signed-off-by: Breno Leitao <[email protected]> --- include/net/udp.h | 2 ++ include/uapi/linux/net.h | 5 +++++ net/ipv4/udp.c | 16 ++++++++++++++++ 3 files changed, 23 insertions(+) diff --git a/include/net/udp.h b/include/net/udp.h index de4b528522bb..c0e829dacc2f 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -283,6 +283,8 @@ void udp_flush_pending_frames(struct sock *sk); int udp_cmsg_send(struct sock *sk, struct msghdr *msg, u16 *gso_size); void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst); int udp_rcv(struct sk_buff *skb); +int udp_uring_cmd(struct sock *sk, struct io_uring_cmd *cmd, + unsigned int issue_flags); int udp_ioctl(struct sock *sk, int cmd, unsigned long arg); int udp_init_sock(struct sock *sk); int udp_pre_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len); diff --git a/include/uapi/linux/net.h b/include/uapi/linux/net.h index 4dabec6bd957..dd8e7ced7d24 100644 --- a/include/uapi/linux/net.h +++ b/include/uapi/linux/net.h @@ -55,4 +55,9 @@ typedef enum { #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ +enum { + SOCKET_URING_OP_SIOCINQ = 0, + SOCKET_URING_OP_SIOCOUTQ, +}; + #endif /* _UAPI_LINUX_NET_H */ diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index c605d171eb2d..d6d60600831b 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -113,6 +113,7 @@ #include <net/sock_reuseport.h> #include <net/addrconf.h> #include <net/udp_tunnel.h> +#include <linux/io_uring.h> #if IS_ENABLED(CONFIG_IPV6) #include <net/ipv6_stubs.h> #endif @@ -1711,6 +1712,20 @@ static int first_packet_length(struct sock *sk) return res; } +int udp_uring_cmd(struct sock *sk, struct io_uring_cmd *cmd, + unsigned int issue_flags) +{ + switch (cmd->sqe->cmd_op) { + case SOCKET_URING_OP_SIOCOUTQ: + return sk_wmem_alloc_get(sk); + case SOCKET_URING_OP_SIOCINQ: + return max_t(int, 0, first_packet_length(sk)); + default: + return -ENOIOCTLCMD; + } +} +EXPORT_SYMBOL_GPL(udp_uring_cmd); + /* * IOCTL requests applicable to the UDP protocol */ @@ -2952,6 +2967,7 @@ struct proto udp_prot = { .connect = ip4_datagram_connect, .disconnect = udp_disconnect, .ioctl = udp_ioctl, + .uring_cmd = udp_uring_cmd, .init = udp_init_sock, .destroy = udp_destroy_sock, .setsockopt = udp_setsockopt, -- 2.34.1