Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

[linux-2.6-microblaze.git] / fs / nfs / flexfilelayout / flexfilelayoutdev.c

diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index 74d8d53..d233473 100644 (file)
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -370,6 +370,25 @@ out:
        return fh;
 }
 
+int
+nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg,
+                               u32 mirror_idx,
+                               nfs4_stateid *stateid)
+{
+       struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, mirror_idx);
+
+       if (!ff_layout_mirror_valid(lseg, mirror, false)) {
+               pr_err_ratelimited("NFS: %s: No data server for mirror offset index %d\n",
+                       __func__, mirror_idx);
+               goto out;
+       }
+
+       nfs4_stateid_copy(stateid, &mirror->stateid);
+       return 1;
+out:
+       return 0;
+}
+
 /**
  * nfs4_ff_layout_prepare_ds - prepare a DS connection for an RPC call
  * @lseg: the layout segment we're operating on