kernel: fs: Add devfs

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

3 files changed, 44 insertions, 0 deletions

diff --git a/sys/include/fs/devfs.h b/sys/include/fs/devfs.h
new file mode 100644
index 0000000..1fa4ada
--- /dev/null
+++ b/sys/include/fs/devfs.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _FS_DEVFS_H_
+#define _FS_DEVFS_H_
+
+#include <sys/vnode.h>
+#include <sys/device.h>
+
+extern struct vfsops g_devfs_ops;
+extern struct vops g_devfs_vops;
+
+int devfs_add_blkdev(const char *name, const struct device *blkdev);
+
+#endif
diff --git a/sys/include/sys/device.h b/sys/include/sys/device.h
index 0dd1744..43b3db7 100644
--- a/sys/include/sys/device.h
+++ b/sys/include/sys/device.h
@@ -38,6 +38,7 @@
 
 struct device {
     dev_t major, minor;
+    size_t blocksize;
     int(*write)(struct device *dev, struct sio_txn *sio);
     int(*read)(struct device *dev, struct sio_txn *sio);
     TAILQ_ENTRY(device) link;
diff --git a/sys/include/sys/vnode.h b/sys/include/sys/vnode.h
index ac66044..ea537f6 100644
--- a/sys/include/sys/vnode.h
+++ b/sys/include/sys/vnode.h
@@ -65,6 +65,8 @@ struct vnode {
  */
 #define VREG    0x01    /* Regular file */
 #define VDIR    0x02    /* Directory */
+#define VCHR    0x03    /* Character device */
+#define VBLK    0x04    /* Block device */
 
 #if defined(_KERNEL)
 int vfs_alloc_vnode(struct vnode **vnode, struct mount *mp, int type);