kernel: reference count mount objects, free them on process kills

1 files changed, 6 insertions, 0 deletions

diff --git a/src/kernel/vfs/mount.h b/src/kernel/vfs/mount.h
index 5fb6d16..96a2d7b 100644
--- a/src/kernel/vfs/mount.h
+++ b/src/kernel/vfs/mount.h
@@ -7,9 +7,15 @@ struct vfs_mount {
 	char *prefix;
 	size_t prefix_len;
 	struct vfs_backend *backend;
+	size_t refs; /* counts all references, atm from:
+	              *  - struct vfs_mount
+	              *  - struct proc
+	              */
 };
 
 // prepares init's filesystem view
 struct vfs_mount *vfs_mount_seed(void);
 struct vfs_mount *vfs_mount_resolve(
 		struct vfs_mount *top, const char *path, size_t path_len);
+/** Decrements the reference count, potentially freeing the mount. */
+void vfs_mount_remref(struct vfs_mount *mnt);