From 5ae5b4259d3d4894c3f5acc5f0691869a3bd219f Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 31 Jul 2025 15:44:41 -0400
Subject: kernel: socket: Keep track of socket owner

Keep track of the process that created a socket.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/sys/socket.h | 2 ++
 sys/kern/kern_socket.c   | 6 ++++++
 2 files changed, 8 insertions(+)

(limited to 'sys')

diff --git a/sys/include/sys/socket.h b/sys/include/sys/socket.h
index 5ce1ec6..a69057b 100644
--- a/sys/include/sys/socket.h
+++ b/sys/include/sys/socket.h
@@ -36,6 +36,7 @@
 #include <sys/uio.h>
 #if defined(_KERNEL)
 #include <sys/types.h>
+#include <sys/proc.h>
 #include <sys/syscall.h>
 #include <sys/mutex.h>
 #else
@@ -154,6 +155,7 @@ struct ksocket {
         struct sockaddr sockaddr;
         struct sockaddr_un un;
     };
+    struct proc *owner;
     struct cmsg_list cmsg_list;
     struct sockbuf buf;
     struct mutex *mtx;
diff --git a/sys/kern/kern_socket.c b/sys/kern/kern_socket.c
index 77041cd..91a2347 100644
--- a/sys/kern/kern_socket.c
+++ b/sys/kern/kern_socket.c
@@ -30,6 +30,7 @@
 #include <sys/socket.h>
 #include <sys/sio.h>
 #include <sys/systm.h>
+#include <sys/proc.h>
 #include <sys/errno.h>
 #include <sys/syslog.h>
 #include <sys/filedesc.h>
@@ -322,6 +323,7 @@ fail:
 int
 bind(int sockfd, const struct sockaddr *addr, socklen_t len)
 {
+    struct proc *td;
     struct ksocket *ksock;
     struct cmsg_list *clp;
     int error;
@@ -337,6 +339,10 @@ bind(int sockfd, const struct sockaddr *addr, socklen_t len)
         return -ENOMEM;
     }
 
+    /* Mark ourselves as the owner */
+    td = this_td();
+    ksock->owner = td;
+
     /* Initialize the cmsg list queue */
     clp = &ksock->cmsg_list;
     TAILQ_INIT(&clp->list);
-- 
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