From 673753e8befcfbb575380ed0d23fc6741b4e50a0 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sun, 19 May 2024 23:05:21 -0400
Subject: kernel: vfs: Add support for open hook

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/fs/devfs.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

(limited to 'sys/fs')

diff --git a/sys/fs/devfs.c b/sys/fs/devfs.c
index 79606eb..d7944aa 100644
--- a/sys/fs/devfs.c
+++ b/sys/fs/devfs.c
@@ -157,6 +157,26 @@ vop_read(struct vnode *vp, struct sio_txn *sio)
     return cdev_read(dev, node, sio);
 }
 
+static int
+vop_open(struct vnode *vp)
+{
+    struct device_node *node;
+    struct device *dev;
+
+    if (vp == NULL) {
+        return -EIO;
+    }
+
+    node = vp->data;
+    dev = device_fetch(node->major, node->minor);
+
+    if (dev->open == NULL) {
+        return -EIO;
+    }
+
+    return dev->open(dev);
+}
+
 static int
 devfs_init(struct fs_info *info, struct vnode *source)
 {
@@ -249,5 +269,6 @@ struct vfsops g_devfs_ops = {
 
 struct vops g_devfs_vops = {
     .vget = vop_vget,
-    .read = vop_read
+    .read = vop_read,
+    .open = vop_open
 };
-- 
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