pnfs: support multiple verfs per direct req
Support direct requests that span multiple pnfs data servers by
comparing nfs_pgio_header->verf to a cached verf in pnfs_commit_bucket.
Continue to use dreq->verf if the MDS is used / non-pNFS.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/include/linux/nfs.h b/include/linux/nfs.h
index 3e794c1..610af51 100644
--- a/include/linux/nfs.h
+++ b/include/linux/nfs.h
@@ -46,6 +46,9 @@
enum nfs3_stable_how {
NFS_UNSTABLE = 0,
NFS_DATA_SYNC = 1,
- NFS_FILE_SYNC = 2
+ NFS_FILE_SYNC = 2,
+
+ /* used by direct.c to mark verf as invalid */
+ NFS_INVALID_STABLE_HOW = -1
};
#endif /* _LINUX_NFS_H */