407 static u32 highest_slotid(struct nfsd4_session *ses)  in highest_slotid()  argument
411 	spin_lock(&ses->se_lock);  in highest_slotid()
412 	idx = fls(~ses->se_cb_slot_avail);  in highest_slotid()
415 	idx = max(idx, ses->se_cb_highest_slot);  in highest_slotid()
416 	spin_unlock(&ses->se_lock);  in highest_slotid()
483 static void update_cb_slot_table(struct nfsd4_session *ses, u32 target)  in update_cb_slot_table()  argument
486 	if (likely(target == READ_ONCE(ses->se_cb_highest_slot)))  in update_cb_slot_table()
489 	spin_lock(&ses->se_lock);  in update_cb_slot_table()
490 	if (target > ses->se_cb_highest_slot) {  in update_cb_slot_table()
501 		for (i = ses->se_cb_highest_slot + 1; i <= target; ++i)  in update_cb_slot_table()
502 			ses->se_cb_seq_nr[i] = 1;  in update_cb_slot_table()
504 	ses->se_cb_highest_slot = target;  in update_cb_slot_table()
505 	spin_unlock(&ses->se_lock);  in update_cb_slot_table()
1121 … *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, struct nfsd4_session *ses)  in get_backchannel_cred()  argument
1135 		kcred->fsuid = ses->se_cb_sec.uid;  in get_backchannel_cred()
1136 		kcred->fsgid = ses->se_cb_sec.gid;  in get_backchannel_cred()
1141 …etup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_session *ses)  in setup_callback_client()  argument
1175 		if (!conn->cb_xprt || !ses)  in setup_callback_client()
1177 		clp->cl_cb_session = ses;  in setup_callback_client()
1182 		args.authflavor = ses->se_cb_sec.flavor;  in setup_callback_client()
1190 	cred = get_backchannel_cred(clp, client, ses);  in setup_callback_client()
1281 static int grab_slot(struct nfsd4_session *ses)  in grab_slot()  argument
1285 	spin_lock(&ses->se_lock);  in grab_slot()
1286 	idx = ffs(ses->se_cb_slot_avail) - 1;  in grab_slot()
1287 	if (idx < 0 || idx > ses->se_cb_highest_slot) {  in grab_slot()
1288 		spin_unlock(&ses->se_lock);  in grab_slot()
1292 	ses->se_cb_slot_avail &= ~BIT(idx);  in grab_slot()
1293 	spin_unlock(&ses->se_lock);  in grab_slot()
1305 	struct nfsd4_session *ses = clp->cl_cb_session;  in nfsd41_cb_get_slot()  local
1309 	cb->cb_held_slot = grab_slot(ses);  in nfsd41_cb_get_slot()
1313 		cb->cb_held_slot = grab_slot(ses);  in nfsd41_cb_get_slot()
1324 	struct nfsd4_session *ses = clp->cl_cb_session;  in nfsd41_cb_release_slot()  local
1327 		spin_lock(&ses->se_lock);  in nfsd41_cb_release_slot()
1328 		ses->se_cb_slot_avail |= BIT(cb->cb_held_slot);  in nfsd41_cb_release_slot()
1329 		spin_unlock(&ses->se_lock);  in nfsd41_cb_release_slot()
1657 	struct nfsd4_session *ses = NULL;  in nfsd4_process_cb_update()  local
1694 		ses = c->cn_session;  in nfsd4_process_cb_update()
1698 	err = setup_callback_client(clp, &conn, ses);  in nfsd4_process_cb_update()