nfsd4: cleanup handling of nfsv4.0 closed stateid's

Closed stateid's are kept around a little while to handle close replays
in the 4.0 case.  So we stash them in the last-used stateid in the
oo_last_closed_stateid field of the open owner.  We can free that in
encode_seqid_op_tail once the seqid on the open owner is next
incremented.  But we don't want to do that on the close itself; so we
set NFS4_OO_PURGE_CLOSE flag set on the open owner, skip freeing it the
first time through encode_seqid_op_tail, then when we see that flag set
next time we free it.

This is unnecessarily baroque.

Instead, just move the logic that increments the seqid out of the xdr
code and into the operation code itself.

The justification given for the current placement is that we need to
wait till the last minute to be sure we know whether the status is a
sequence-id-mutating error or not, but examination of the code shows
that can't actually happen.

Reported-by: Yanchuan Nian <ycnian@gmail.com>
Tested-by: Yanchuan Nian <ycnian@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 7674bc806200..13ec4853e9af 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -355,7 +355,6 @@ struct nfs4_openowner {
         struct nfs4_ol_stateid *oo_last_closed_stid;
         time_t                  oo_time; /* time of placement on so_close_lru */
 #define NFS4_OO_CONFIRMED   1
-#define NFS4_OO_PURGE_CLOSE 2
 #define NFS4_OO_NEW         4
         unsigned char           oo_flags;
 };
@@ -363,7 +362,7 @@ struct nfs4_openowner {
 struct nfs4_lockowner {
         struct nfs4_stateowner  lo_owner; /* must be first element */
         struct list_head        lo_owner_ino_hash; /* hash by owner,file */
-        struct list_head        lo_perstateid; /* for lockowners only */
+        struct list_head        lo_perstateid;
         struct list_head        lo_list; /* for temporary uses */
 };
 
@@ -477,7 +476,6 @@ extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
                                                         struct nfsd_net *nn);
 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
 extern void put_client_renew(struct nfs4_client *clp);
-extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
 
 /* nfs4recover operations */
 extern int nfsd4_client_tracking_init(struct net *net);