From d6104baa618686f7f0f0f36216394b60553ac14a Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 21 May 2024 22:18:52 -0400
Subject: kernel: devfs: Add support for close hook

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

(limited to 'sys')

diff --git a/sys/fs/devfs.c b/sys/fs/devfs.c
index d7944aa..7fcdbad 100644
--- a/sys/fs/devfs.c
+++ b/sys/fs/devfs.c
@@ -177,6 +177,26 @@ vop_open(struct vnode *vp)
     return dev->open(dev);
 }
 
+static int
+vop_close(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->close == NULL) {
+        return -EIO;
+    }
+
+    return dev->close(dev);
+}
+
 static int
 devfs_init(struct fs_info *info, struct vnode *source)
 {
@@ -270,5 +290,6 @@ struct vfsops g_devfs_ops = {
 struct vops g_devfs_vops = {
     .vget = vop_vget,
     .read = vop_read,
-    .open = vop_open
+    .open = vop_open,
+    .close = vop_close
 };
diff --git a/sys/include/sys/device.h b/sys/include/sys/device.h
index 69e367f..1bca4a8 100644
--- a/sys/include/sys/device.h
+++ b/sys/include/sys/device.h
@@ -43,6 +43,7 @@ struct device {
     int(*read)(struct device *dev, struct sio_txn *sio);
     int(*ioctl)(struct device *dev, uint32_t cmd, uintptr_t arg);
     int(*open)(struct device *dev);
+    int(*close)(struct device *dev);
     paddr_t(*mmap)(struct device *dev, off_t off, vm_prot_t prot);
     TAILQ_ENTRY(device) link;
 };
-- 
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