kernel: dev: Support bdevsw

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 14 insertions, 2 deletions

diff --git a/sys/fs/devfs.c b/sys/fs/devfs.c
index e320973..81c2a43 100644
--- a/sys/fs/devfs.c
+++ b/sys/fs/devfs.c
@@ -55,6 +55,14 @@ cdevsw_read(void *devsw, dev_t dev, struct sio_txn *sio)
     return cdevsw->read(dev, sio, 0);
 }
 
+static inline int
+bdevsw_read(void *devsw, dev_t dev, struct sio_txn *sio)
+{
+    struct bdevsw *bdevsw = devsw;
+
+    return bdevsw->read(dev, sio, 0);
+}
+
 /*
  * Get a devfs node by name.
  *
@@ -134,8 +142,8 @@ devfs_read(struct vnode *vp, struct sio_txn *sio)
     if (!dnp->is_block)
         return cdevsw_read(devsw, dnp->dev, sio);
 
-    /* TODO: Block devices */
-    return -EIO;
+    /* Block device */
+    return bdevsw_read(devsw, dnp->dev, sio);
 }
 
 static int
diff --git a/sys/include/sys/device.h b/sys/include/sys/device.h
index 3ba7141..edf83ae 100644
--- a/sys/include/sys/device.h
+++ b/sys/include/sys/device.h
@@ -44,6 +44,10 @@ struct cdevsw {
     int(*read)(dev_t dev, struct sio_txn *sio, int flags);
 };
 
+struct bdevsw {
+    int(*read)(dev_t dev, struct sio_txn *sio, int flags);
+};
+
 void *dev_get(devmajor_t major, dev_t dev);
 dev_t dev_alloc(devmajor_t major);