kern: Add initial virtual file system sources

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

1 files changed, 96 insertions, 0 deletions

diff --git a/sys/inc/os/mount.h b/sys/inc/os/mount.h
new file mode 100644
index 0000000..6cfff2f
--- /dev/null
+++ b/sys/inc/os/mount.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2025 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 _OS_MOUNT_H_
+#define _OS_MOUNT_H_ 1
+
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <os/vnode.h>
+
+/* Filesystem names */
+#define MOUNT_TMPFS "tmpfs"
+
+struct fs_info;
+
+/*
+ * Represents arguments passed to mount()
+ */
+struct mount_args {
+    const char *source;
+    const char *target;
+    const char *fstype;
+    uint32_t flags;
+    void *data;
+};
+
+/*
+ * Represents VFS operations that can be performed
+ * on filesystem objects
+ */
+struct vfsops {
+    int(*mount)(struct fs_info *fip, void *data);
+};
+
+/*
+ * Represents filesystem operation
+ *
+ * @name: Name of filesystem
+ * @vfsops: Represents operations that can be performed
+ * @is_mounted: Set if filesystem is mounted
+ */
+struct fs_info {
+    char *name;
+    struct vfsops *vfsops;
+    uint8_t is_mounted : 1;
+};
+
+/*
+ * Represents a mountpoint
+ *
+ * @fip: Target filesystem interface
+ * @vp: Vnode pointer length
+ * @link: Connects mountpoints
+ */
+struct mount {
+    struct fs_info *fip;
+    struct vnode *vp;
+    TAILQ_ENTRY(mount) link;
+};
+
+/*
+ * Mount a filesystem and make it visible for access
+ *
+ * @margs: Mount arguments
+ *
+ * Returns zero on success
+ */
+int mount(struct mount_args *margs);
+
+#endif  /* !_OS_MOUNT_H_ */