1 files changed, 42 insertions, 1 deletions

diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 9d3be371240a..4f3bfeb11766 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -92,6 +92,7 @@ struct nfs4_stid {
 /* For a deleg stateid kept around only to process free_stateid's: */
 #define NFS4_REVOKED_DELEG_STID 16
 #define NFS4_CLOSED_DELEG_STID 32
+#define NFS4_LAYOUT_STID 64
         unsigned char sc_type;
         stateid_t sc_stateid;
         struct nfs4_client *sc_client;
@@ -297,6 +298,9 @@ struct nfs4_client {
         struct list_head        cl_delegations;
         struct list_head        cl_revoked;     /* unacknowledged, revoked 4.1 state */
         struct list_head        cl_lru;         /* tail queue */
+#ifdef CONFIG_NFSD_PNFS
+        struct list_head        cl_lo_states;   /* outstanding layout states */
+#endif
         struct xdr_netobj       cl_name;        /* id generated by client */
         nfs4_verifier           cl_verifier;    /* generated by client */
         time_t                  cl_time;        /* time of last lease renewal */
@@ -493,9 +497,13 @@ struct nfs4_file {
         atomic_t                fi_access[2];
         u32                     fi_share_deny;
         struct file             *fi_deleg_file;
-        atomic_t                fi_delegees;
+        int                     fi_delegees;
         struct knfsd_fh         fi_fhandle;
         bool                    fi_had_conflict;
+#ifdef CONFIG_NFSD_PNFS
+        struct list_head        fi_lo_states;
+        atomic_t                fi_lo_recalls;
+#endif
 };
 
 /*
@@ -528,6 +536,24 @@ static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
         return container_of(s, struct nfs4_ol_stateid, st_stid);
 }
 
+struct nfs4_layout_stateid {
+        struct nfs4_stid                ls_stid;
+        struct list_head                ls_perclnt;
+        struct list_head                ls_perfile;
+        spinlock_t                      ls_lock;
+        struct list_head                ls_layouts;
+        u32                             ls_layout_type;
+        struct file                     *ls_file;
+        struct nfsd4_callback           ls_recall;
+        stateid_t                       ls_recall_sid;
+        bool                            ls_recalled;
+};
+
+static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
+{
+        return container_of(s, struct nfs4_layout_stateid, ls_stid);
+}
+
 /* flags for preprocess_seqid_op() */
 #define RD_STATE                0x00000010
 #define WR_STATE                0x00000020
@@ -535,6 +561,7 @@ static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
 enum nfsd4_cb_op {
         NFSPROC4_CLNT_CB_NULL = 0,
         NFSPROC4_CLNT_CB_RECALL,
+        NFSPROC4_CLNT_CB_LAYOUT,
         NFSPROC4_CLNT_CB_SEQUENCE,
 };
 
@@ -545,6 +572,12 @@ struct nfsd_net;
 extern __be32 nfs4_preprocess_stateid_op(struct net *net,
                 struct nfsd4_compound_state *cstate,
                 stateid_t *stateid, int flags, struct file **filp);
+__be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
+                     stateid_t *stateid, unsigned char typemask,
+                     struct nfs4_stid **s, struct nfsd_net *nn);
+struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl,
+                struct kmem_cache *slab);
+void nfs4_unhash_stid(struct nfs4_stid *s);
 void nfs4_put_stid(struct nfs4_stid *s);
 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
 extern void nfs4_release_reclaim(struct nfsd_net *);
@@ -567,6 +600,14 @@ 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);
 
+struct nfs4_file *find_file(struct knfsd_fh *fh);
+void put_nfs4_file(struct nfs4_file *fi);
+static inline void get_nfs4_file(struct nfs4_file *fi)
+{
+        atomic_inc(&fi->fi_ref);
+}
+struct file *find_any_file(struct nfs4_file *f);
+
 /* grace period management */
 void nfsd4_end_grace(struct nfsd_net *nn);