From 9692ed2f93777e1060837b97687509f8a22c2b60 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Tue, 3 May 2022 20:31:50 +0200
Subject: kernel: reference count mount objects, free them on process kills

---
 src/kernel/proc.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/kernel/proc.c')

diff --git a/src/kernel/proc.c b/src/kernel/proc.c
index ba19943..90570b8 100644
--- a/src/kernel/proc.c
+++ b/src/kernel/proc.c
@@ -72,6 +72,9 @@ struct process *process_fork(struct process *parent, int flags) {
 		// no overflow check - if you manage to get 2^32 references to a handle you have bigger problems
 	}
 
+	assert(child->mount);
+	child->mount->refs++;
+
 	child->id = next_pid++;
 
 	return child;
@@ -104,6 +107,10 @@ void process_free(struct process *p) {
 	while (p->child)
 		process_free(p->child);
 
+	// also could be done on kill
+	vfs_mount_remref(p->mount);
+	p->mount = NULL;
+
 	if (!p->parent) return;
 	process_forget(p);
 	pagedir_free(p->pages); // TODO could be done on kill
-- 
cgit v1.2.3