pnfs: record sequence in pnfs_layout_segment when it's created

In later patches, we're going to teach the client to be more selective
about how it returns layouts. This means keeping a record of what the
stateid's seqid was at the time that the server handed out a layout
segment.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index faea98281c75..c09ced88bd38 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1697,6 +1697,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
 
         init_lseg(lo, lseg);
         lseg->pls_range = res->range;
+        lseg->pls_seq = be32_to_cpu(res->stateid.seqid);
 
         spin_lock(&ino->i_lock);
         if (pnfs_layoutgets_blocked(lo)) {
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 7222d3a35439..361fa5494aa5 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -64,6 +64,7 @@ struct pnfs_layout_segment {
         struct list_head pls_lc_list;
         struct pnfs_layout_range pls_range;
         atomic_t pls_refcount;
+        u32 pls_seq;
         unsigned long pls_flags;
         struct pnfs_layout_hdr *pls_layout;
         struct work_struct pls_work;