NFSD: Implement SEEK

This patch adds server support for the NFS v4.2 operation SEEK, which
returns the position of the next hole or data segment in a file.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 465e7799742a..5720e9457f33 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -428,6 +428,17 @@ struct nfsd4_reclaim_complete {
         u32 rca_one_fs;
 };
 
+struct nfsd4_seek {
+        /* request */
+        stateid_t       seek_stateid;
+        loff_t          seek_offset;
+        u32             seek_whence;
+
+        /* response */
+        u32             seek_eof;
+        loff_t          seek_pos;
+};
+
 struct nfsd4_op {
         int                                     opnum;
         __be32                                  status;
@@ -473,6 +484,9 @@ struct nfsd4_op {
                 struct nfsd4_reclaim_complete   reclaim_complete;
                 struct nfsd4_test_stateid       test_stateid;
                 struct nfsd4_free_stateid       free_stateid;
+
+                /* NFSv4.2 */
+                struct nfsd4_seek               seek;
         } u;
         struct nfs4_replay *                    replay;
 };