kern: vfs: Add vop_getattr() for vnodes

The vop_getattr() allows the caller to obtain information about a file
represented by a specific vnode

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

1 files changed, 20 insertions, 0 deletions

diff --git a/src/sys/os/vfs_subr.c b/src/sys/os/vfs_subr.c
index adfcffb..2ae18af 100644
--- a/src/sys/os/vfs_subr.c
+++ b/src/sys/os/vfs_subr.c
@@ -246,3 +246,23 @@ vop_create(struct vnode *vp, struct nameidata *ndp)
     args.ndp = ndp;
     return vops->create(&args);
 }
+
+int
+vop_getattr(struct vnode *vp, struct vattr *res)
+{
+    struct vop *vops;
+
+    if (vp == NULL || res == NULL) {
+        return -EINVAL;
+    }
+
+    if ((vops = vp->vops) == NULL) {
+        return -EIO;
+    }
+
+    if (vops->getattr == NULL) {
+        return -EIO;
+    }
+
+    return vops->getattr(vp, res);
+}