[PATCH] knfsd: add structures for delegation support

Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/nfsd/state.h

@@ -67,6 +67,41 @@ extern stateid_t onestateid;
 #define ZERO_STATEID(stateid)       (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
 #define ONE_STATEID(stateid)        (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
 
+/* Delegation recall states */
+#define NFS4_NO_RECALL			0x000
+#define NFS4_RECALL_IN_PROGRESS		0x001
+#define NFS4_RECALL_COMPLETE		0x002
+#define NFS4_REAP_DELEG			0x004
+
+struct nfs4_cb_recall {
+	u32			cbr_ident;
+	int			cbr_trunc;
+	stateid_t		cbr_stateid;
+	u32			cbr_fhlen;
+	u32			cbr_fhval[NFS4_FHSIZE];
+	struct nfs4_delegation	*cbr_dp;
+};
+
+struct nfs4_delegation {
+	struct list_head	dl_del_perfile; /* nfs4_file->fi_del_perfile */
+	struct list_head	dl_del_perclnt; /* nfs4_client->cl_del_perclnt*/
+	struct list_head	dl_recall_lru;  /* delegation recalled */
+	atomic_t		dl_recall_cnt;  /* resend cb_recall only once */
+	atomic_t		dl_count;       /* ref count */
+	atomic_t		dl_state;       /* recall state */
+	struct nfs4_client	*dl_client;
+	struct nfs4_file	*dl_file;
+	struct file_lock	*dl_flock;
+	struct nfs4_stateid	*dl_stp;
+	u32			dl_type;
+	time_t			dl_time;
+	struct nfs4_cb_recall	dl_recall;
+};
+
+#define dl_stateid      dl_recall.cbr_stateid
+#define dl_fhlen        dl_recall.cbr_fhlen
+#define dl_fhval        dl_recall.cbr_fhval
+
 /* client delegation callback info */
 struct nfs4_callback {
 	/* SETCLIENTID info */
@@ -96,6 +131,7 @@ struct nfs4_client {
 	struct list_head	cl_idhash; 	/* hash by cl_clientid.id */
 	struct list_head	cl_strhash; 	/* hash by cl_name */
 	struct list_head	cl_perclient; 	/* list: stateowners */
+	struct list_head	cl_del_perclnt; /* list: delegations */
 	struct list_head        cl_lru;         /* tail queue */
 	struct xdr_netobj	cl_name; 	/* id generated by client */
 	nfs4_verifier		cl_verifier; 	/* generated by client */
@@ -194,6 +230,7 @@ struct nfs4_stateowner {
 struct nfs4_file {
 	struct list_head        fi_hash;    /* hash by "struct inode *" */
 	struct list_head        fi_perfile; /* list: nfs4_stateid */
+	struct list_head	fi_del_perfile; /* list: nfs4_delegation */
 	struct inode		*fi_inode;
 	u32                     fi_id;      /* used with stateowner->so_id 
 					     * for stateid_hashtbl hash */