This is the implementation of uring_cmd for the TCP protocol. It
basically encompasses SOCKET_URING_OP_SIOCOUTQ and
SOCKET_URING_OP_SIOCINQ, which calls tcp_ioctl().
tcp_ioctl() has other CMDs, such as SIOCATMARK and SIOCOUTQNSD, but they
are not implemented, because they are TCP specific, and not available on
UDP and RAW sockets.
Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
---
include/net/tcp.h | 2 ++
net/ipv4/tcp.c | 21 +++++++++++++++++++++
net/ipv4/tcp_ipv4.c | 1 +
3 files changed, 24 insertions(+)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 2a7289916d42..1100b0c9df98 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -340,6 +340,8 @@ void tcp_wfree(struct sk_buff *skb);
void tcp_write_timer_handler(struct sock *sk);
void tcp_delack_timer_handler(struct sock *sk);
int tcp_ioctl(struct sock *sk, int cmd, int *karg);
+int tcp_uring_cmd(struct sock *sk, struct io_uring_cmd *cmd,
+ unsigned int issue_flags);
int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb);
void tcp_rcv_established(struct sock *sk, struct sk_buff *skb);
void tcp_rcv_space_adjust(struct sock *sk);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2cb01880755a..8bf9a41d2a67 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -279,6 +279,7 @@
#include <linux/uaccess.h>
#include <asm/ioctls.h>
#include <net/busy_poll.h>
+#include <linux/io_uring.h>
/* Track pending CMSGs. */
enum {
@@ -599,6 +600,26 @@ __poll_t tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
}
EXPORT_SYMBOL(tcp_poll);
+int tcp_uring_cmd(struct sock *sk, struct io_uring_cmd *cmd,
+ unsigned int issue_flags)
+{
+ int ret;
+
+ switch (cmd->sqe->cmd_op) {
+ case SOCKET_URING_OP_SIOCINQ:
+ if (tcp_ioctl(sk, SIOCINQ, &ret))
+ return -EFAULT;
+ return ret;
+ case SOCKET_URING_OP_SIOCOUTQ:
+ if (tcp_ioctl(sk, SIOCOUTQ, &ret))
+ return -EFAULT;
+ return ret;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+EXPORT_SYMBOL_GPL(tcp_uring_cmd);
+
int tcp_ioctl(struct sock *sk, int cmd, int *karg)
{
struct tcp_sock *tp = tcp_sk(sk);
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 84a5d557dc1a..dd93a862d195 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3107,6 +3107,7 @@ struct proto tcp_prot = {
.disconnect = tcp_disconnect,
.accept = inet_csk_accept,
.ioctl = tcp_ioctl,
+ .uring_cmd = tcp_uring_cmd,
.init = tcp_v4_init_sock,
.destroy = tcp_v4_destroy_sock,
.shutdown = tcp_shutdown,
--
2.34.1
