nfs: Add DEALLOCATE support

This patch adds support for using the NFS v4.2 operation DEALLOCATE to
punch holes in a file.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 2b28a21edcd0..022b761dbf0a 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -491,6 +491,7 @@ enum {
         /* nfs42 */
         NFSPROC4_CLNT_SEEK,
         NFSPROC4_CLNT_ALLOCATE,
+        NFSPROC4_CLNT_DEALLOCATE,
 };
 
 /* nfs41 types */
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index df6ed429b406..1e37fbb78f7a 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -232,5 +232,6 @@ struct nfs_server {
 #define NFS_CAP_SECURITY_LABEL  (1U << 18)
 #define NFS_CAP_SEEK            (1U << 19)
 #define NFS_CAP_ALLOCATE        (1U << 20)
+#define NFS_CAP_DEALLOCATE      (1U << 21)
 
 #endif