+ if (test_and_set_bit(fail_bit, &lo->plh_flags))
+ atomic_inc(&lo->plh_refcount);
+}
+
+static void
+pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit)
+{
+ if (test_and_clear_bit(fail_bit, &lo->plh_flags))
+ atomic_dec(&lo->plh_refcount);
+}
+
+static void
+pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode)
+{
+ struct inode *inode = lo->plh_inode;
+
+ spin_lock(&inode->i_lock);
+ pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
+ spin_unlock(&inode->i_lock);