58 #include "trace.h"
106  * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
139 		rc = -ENOMEM;  in nfsd4_create_laundry_wq()
150 	return ses->se_flags & NFS4_SESSION_DEAD;  in is_session_dead()
155 	if (atomic_read(&ses->se_ref) > ref_held_by_me)  in mark_session_dead_locked()
157 	ses->se_flags |= NFS4_SESSION_DEAD;  in mark_session_dead_locked()
163 	return clp->cl_time == 0;  in is_client_expired()
169 	if (clp->cl_state != NFSD4_ACTIVE)  in nfsd4_dec_courtesy_client_count()
170 		atomic_add_unless(&nn->nfsd_courtesy_clients, -1, 0);  in nfsd4_dec_courtesy_client_count()
175 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in get_client_locked()
177 	lockdep_assert_held(&nn->client_lock);  in get_client_locked()
181 	atomic_inc(&clp->cl_rpc_users);  in get_client_locked()
183 	clp->cl_state = NFSD4_ACTIVE;  in get_client_locked()
191 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in renew_client_locked()
197 			clp->cl_clientid.cl_boot,  in renew_client_locked()
198 			clp->cl_clientid.cl_id);  in renew_client_locked()
202 	list_move_tail(&clp->cl_lru, &nn->client_lru);  in renew_client_locked()
203 	clp->cl_time = ktime_get_boottime_seconds();  in renew_client_locked()
205 	clp->cl_state = NFSD4_ACTIVE;  in renew_client_locked()
210 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in put_client_renew_locked()
212 	lockdep_assert_held(&nn->client_lock);  in put_client_renew_locked()
214 	if (!atomic_dec_and_test(&clp->cl_rpc_users))  in put_client_renew_locked()
224 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in put_client_renew()
226 	if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock))  in put_client_renew()
232 	spin_unlock(&nn->client_lock);  in put_client_renew()
241 	status = get_client_locked(ses->se_client);  in nfsd4_get_session_locked()
244 	atomic_inc(&ses->se_ref);  in nfsd4_get_session_locked()
250 	struct nfs4_client *clp = ses->se_client;  in nfsd4_put_session_locked()
251 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in nfsd4_put_session_locked()
253 	lockdep_assert_held(&nn->client_lock);  in nfsd4_put_session_locked()
255 	if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))  in nfsd4_put_session_locked()
262 	struct nfs4_client *clp = ses->se_client;  in nfsd4_put_session()
263 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in nfsd4_put_session()
265 	spin_lock(&nn->client_lock);  in nfsd4_put_session()
267 	spin_unlock(&nn->client_lock);  in nfsd4_put_session()
276 	spin_lock(&nn->blocked_locks_lock);  in find_blocked_lock()
277 	list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {  in find_blocked_lock()
278 		if (fh_match(fh, &cur->nbl_fh)) {  in find_blocked_lock()
279 			list_del_init(&cur->nbl_list);  in find_blocked_lock()
280 			WARN_ON(list_empty(&cur->nbl_lru));  in find_blocked_lock()
281 			list_del_init(&cur->nbl_lru);  in find_blocked_lock()
286 	spin_unlock(&nn->blocked_locks_lock);  in find_blocked_lock()
288 		locks_delete_block(&found->nbl_lock);  in find_blocked_lock()
302 			INIT_LIST_HEAD(&nbl->nbl_list);  in find_or_allocate_block()
303 			INIT_LIST_HEAD(&nbl->nbl_lru);  in find_or_allocate_block()
304 			fh_copy_shallow(&nbl->nbl_fh, fh);  in find_or_allocate_block()
305 			locks_init_lock(&nbl->nbl_lock);  in find_or_allocate_block()
306 			kref_init(&nbl->nbl_kref);  in find_or_allocate_block()
307 			nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,  in find_or_allocate_block()
327 	locks_delete_block(&nbl->nbl_lock);  in free_blocked_lock()
328 	locks_release_private(&nbl->nbl_lock);  in free_blocked_lock()
329 	kref_put(&nbl->nbl_kref, free_nbl);  in free_blocked_lock()
335 	struct nfs4_client *clp = lo->lo_owner.so_client;  in remove_blocked_locks()
336 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in remove_blocked_locks()
341 	spin_lock(&nn->blocked_locks_lock);  in remove_blocked_locks()
342 	while (!list_empty(&lo->lo_blocked)) {  in remove_blocked_locks()
343 		nbl = list_first_entry(&lo->lo_blocked,  in remove_blocked_locks()
346 		list_del_init(&nbl->nbl_list);  in remove_blocked_locks()
347 		WARN_ON(list_empty(&nbl->nbl_lru));  in remove_blocked_locks()
348 		list_move(&nbl->nbl_lru, &reaplist);  in remove_blocked_locks()
350 	spin_unlock(&nn->blocked_locks_lock);  in remove_blocked_locks()
356 		list_del_init(&nbl->nbl_lru);  in remove_blocked_locks()
366 	locks_delete_block(&nbl->nbl_lock);  in nfsd4_cb_notify_lock_prepare()
379 	switch (task->tk_status) {  in nfsd4_cb_notify_lock_done()
380 	case -NFS4ERR_DELAY:  in nfsd4_cb_notify_lock_done()
409  * https://datatracker.ietf.org/doc/html/rfc7530#section-16.19.4 that
447 	stp->st_access_bmap |= mask;  in set_access()
457 	stp->st_access_bmap &= ~mask;  in clear_access()
466 	return (bool)(stp->st_access_bmap & mask);  in test_access()
476 	stp->st_deny_bmap |= mask;  in set_deny()
486 	stp->st_deny_bmap &= ~mask;  in clear_deny()
495 	return (bool)(stp->st_deny_bmap & mask);  in test_deny()
530 	atomic_inc(&sop->so_count);  in nfs4_get_stateowner()
537 	return (sop->so_owner.len == owner->len) &&  in same_owner_str()
538 		0 == memcmp(sop->so_owner.data, owner->data, owner->len);  in same_owner_str()
547 	lockdep_assert_held(&clp->cl_lock);  in find_openstateowner_str_locked()
549 	list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],  in find_openstateowner_str_locked()
551 		if (!so->so_is_open_owner)  in find_openstateowner_str_locked()
553 		if (same_owner_str(so, &open->op_owner))  in find_openstateowner_str_locked()
565 	spin_lock(&clp->cl_lock);  in find_openstateowner_str()
567 	spin_unlock(&clp->cl_lock);  in find_openstateowner_str()
577 	while (nbytes--) {  in opaque_hashval()
594 	if (refcount_dec_and_test(&fi->fi_ref)) {  in put_nfs4_file()
596 		WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));  in put_nfs4_file()
597 		WARN_ON_ONCE(!list_empty(&fi->fi_delegations));  in put_nfs4_file()
598 		call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);  in put_nfs4_file()
607 	lockdep_assert_held(&f->fi_lock);  in find_writeable_file_locked()
609 	ret = nfsd_file_get(f->fi_fds[O_WRONLY]);  in find_writeable_file_locked()
611 		ret = nfsd_file_get(f->fi_fds[O_RDWR]);  in find_writeable_file_locked()
620 	spin_lock(&f->fi_lock);  in find_writeable_file()
622 	spin_unlock(&f->fi_lock);  in find_writeable_file()
632 	lockdep_assert_held(&f->fi_lock);  in find_readable_file_locked()
634 	ret = nfsd_file_get(f->fi_fds[O_RDONLY]);  in find_readable_file_locked()
636 		ret = nfsd_file_get(f->fi_fds[O_RDWR]);  in find_readable_file_locked()
645 	spin_lock(&f->fi_lock);  in find_readable_file()
647 	spin_unlock(&f->fi_lock);  in find_readable_file()
657 	spin_lock(&f->fi_lock);  in find_rw_file()
658 	ret = nfsd_file_get(f->fi_fds[O_RDWR]);  in find_rw_file()
659 	spin_unlock(&f->fi_lock);  in find_rw_file()
671 	spin_lock(&f->fi_lock);  in find_any_file()
672 	ret = nfsd_file_get(f->fi_fds[O_RDWR]);  in find_any_file()
674 		ret = nfsd_file_get(f->fi_fds[O_WRONLY]);  in find_any_file()
676 			ret = nfsd_file_get(f->fi_fds[O_RDONLY]);  in find_any_file()
678 	spin_unlock(&f->fi_lock);  in find_any_file()
684 	lockdep_assert_held(&f->fi_lock);  in find_any_file_locked()
686 	if (f->fi_fds[O_RDWR])  in find_any_file_locked()
687 		return f->fi_fds[O_RDWR];  in find_any_file_locked()
688 	if (f->fi_fds[O_WRONLY])  in find_any_file_locked()
689 		return f->fi_fds[O_WRONLY];  in find_any_file_locked()
690 	if (f->fi_fds[O_RDONLY])  in find_any_file_locked()
691 		return f->fi_fds[O_RDONLY];  in find_any_file_locked()
705 #define OWNER_HASH_MASK             (OWNER_HASH_SIZE - 1)
711 	ret = opaque_hashval(ownername->data, ownername->len);  in ownerstr_hashval()
743  *	false - access/deny mode conflict with normal client.
744  *	true  - no conflict or conflict with courtesy client(s) is resolved.
756 	lockdep_assert_held(&fp->fi_lock);  in nfs4_resolve_deny_conflicts_locked()
757 	list_for_each_entry(st, &fp->fi_stateids, st_perfile) {  in nfs4_resolve_deny_conflicts_locked()
759 		if (st->st_openstp)  in nfs4_resolve_deny_conflicts_locked()
764 		bmap = share_access ? st->st_deny_bmap : st->st_access_bmap;  in nfs4_resolve_deny_conflicts_locked()
767 		clp = st->st_stid.sc_client;  in nfs4_resolve_deny_conflicts_locked()
774 		clp = stp->st_stid.sc_client;  in nfs4_resolve_deny_conflicts_locked()
775 		nn = net_generic(clp->net, nfsd_net_id);  in nfs4_resolve_deny_conflicts_locked()
776 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in nfs4_resolve_deny_conflicts_locked()
784 	lockdep_assert_held(&fp->fi_lock);  in __nfs4_file_get_access()
787 		atomic_inc(&fp->fi_access[O_WRONLY]);  in __nfs4_file_get_access()
789 		atomic_inc(&fp->fi_access[O_RDONLY]);  in __nfs4_file_get_access()
795 	lockdep_assert_held(&fp->fi_lock);  in nfs4_file_get_access()
802 	if ((access & fp->fi_share_deny) != 0)  in nfs4_file_get_access()
818 		    atomic_read(&fp->fi_access[O_RDONLY]))  in nfs4_file_check_deny()
822 		    atomic_read(&fp->fi_access[O_WRONLY]))  in nfs4_file_check_deny()
830 	might_lock(&fp->fi_lock);  in __nfs4_file_put_access()
832 	if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {  in __nfs4_file_put_access()
836 		swap(f1, fp->fi_fds[oflag]);  in __nfs4_file_put_access()
837 		if (atomic_read(&fp->fi_access[1 - oflag]) == 0)  in __nfs4_file_put_access()
838 			swap(f2, fp->fi_fds[O_RDWR]);  in __nfs4_file_put_access()
839 		spin_unlock(&fp->fi_lock);  in __nfs4_file_put_access()
861  * Note that we only allocate it for pNFS-enabled exports, otherwise
871 		co->co_client = clp;  in alloc_clnt_odstate()
872 		refcount_set(&co->co_odcount, 1);  in alloc_clnt_odstate()
880 	struct nfs4_file *fp = co->co_file;  in hash_clnt_odstate_locked()
882 	lockdep_assert_held(&fp->fi_lock);  in hash_clnt_odstate_locked()
883 	list_add(&co->co_perfile, &fp->fi_clnt_odstate);  in hash_clnt_odstate_locked()
890 		refcount_inc(&co->co_odcount);  in get_clnt_odstate()
901 	fp = co->co_file;  in put_clnt_odstate()
902 	if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {  in put_clnt_odstate()
903 		list_del(&co->co_perfile);  in put_clnt_odstate()
904 		spin_unlock(&fp->fi_lock);  in put_clnt_odstate()
906 		nfsd4_return_all_file_layouts(co->co_client, fp);  in put_clnt_odstate()
920 	cl = new->co_client;  in find_or_hash_clnt_odstate()
922 	spin_lock(&fp->fi_lock);  in find_or_hash_clnt_odstate()
923 	list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {  in find_or_hash_clnt_odstate()
924 		if (co->co_client == cl) {  in find_or_hash_clnt_odstate()
930 	co->co_file = fp;  in find_or_hash_clnt_odstate()
933 	spin_unlock(&fp->fi_lock);  in find_or_hash_clnt_odstate()
948 	spin_lock(&cl->cl_lock);  in nfs4_alloc_stid()
950 	new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT);  in nfs4_alloc_stid()
951 	spin_unlock(&cl->cl_lock);  in nfs4_alloc_stid()
956 	stid->sc_free = sc_free;  in nfs4_alloc_stid()
957 	stid->sc_client = cl;  in nfs4_alloc_stid()
958 	stid->sc_stateid.si_opaque.so_id = new_id;  in nfs4_alloc_stid()
959 	stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;  in nfs4_alloc_stid()
961 	refcount_set(&stid->sc_count, 1);  in nfs4_alloc_stid()
962 	spin_lock_init(&stid->sc_lock);  in nfs4_alloc_stid()
963 	INIT_LIST_HEAD(&stid->sc_cp_list);  in nfs4_alloc_stid()
988 	stid->cs_stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;  in nfs4_init_cp_state()
989 	stid->cs_stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;  in nfs4_init_cp_state()
992 	spin_lock(&nn->s2s_cp_lock);  in nfs4_init_cp_state()
993 	new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT);  in nfs4_init_cp_state()
994 	stid->cs_stid.si_opaque.so_id = new_id;  in nfs4_init_cp_state()
995 	stid->cs_stid.si_generation = 1;  in nfs4_init_cp_state()
996 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_init_cp_state()
1000 	stid->cs_type = cs_type;  in nfs4_init_cp_state()
1006 	return nfs4_init_cp_state(nn, &copy->cp_stateid, NFS4_COPY_STID);  in nfs4_init_copy_state()
1017 	cps->cpntf_time = ktime_get_boottime_seconds();  in nfs4_alloc_init_cpntf_state()
1018 	refcount_set(&cps->cp_stateid.cs_count, 1);  in nfs4_alloc_init_cpntf_state()
1019 	if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID))  in nfs4_alloc_init_cpntf_state()
1021 	spin_lock(&nn->s2s_cp_lock);  in nfs4_alloc_init_cpntf_state()
1022 	list_add(&cps->cp_list, &p_stid->sc_cp_list);  in nfs4_alloc_init_cpntf_state()
1023 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_alloc_init_cpntf_state()
1034 	if (copy->cp_stateid.cs_type != NFS4_COPY_STID)  in nfs4_free_copy_state()
1036 	nn = net_generic(copy->cp_clp->net, nfsd_net_id);  in nfs4_free_copy_state()
1037 	spin_lock(&nn->s2s_cp_lock);  in nfs4_free_copy_state()
1038 	idr_remove(&nn->s2s_cp_stateids,  in nfs4_free_copy_state()
1039 		   copy->cp_stateid.cs_stid.si_opaque.so_id);  in nfs4_free_copy_state()
1040 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_free_copy_state()
1049 	spin_lock(&nn->s2s_cp_lock);  in nfs4_free_cpntf_statelist()
1050 	while (!list_empty(&stid->sc_cp_list)) {  in nfs4_free_cpntf_statelist()
1051 		cps = list_first_entry(&stid->sc_cp_list,  in nfs4_free_cpntf_statelist()
1055 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_free_cpntf_statelist()
1073 	WARN_ON_ONCE(!list_empty(&stid->sc_cp_list));  in nfs4_free_deleg()
1074 	WARN_ON_ONCE(!list_empty(&dp->dl_perfile));  in nfs4_free_deleg()
1075 	WARN_ON_ONCE(!list_empty(&dp->dl_perclnt));  in nfs4_free_deleg()
1076 	WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru));  in nfs4_free_deleg()
1094  * low 3 bytes as hash-table indices.
1113 	if (bd->entries == 0)  in delegation_blocked()
1115 	if (ktime_get_seconds() - bd->swap_time > 30) {  in delegation_blocked()
1117 		if (ktime_get_seconds() - bd->swap_time > 30) {  in delegation_blocked()
1118 			bd->entries -= bd->old_entries;  in delegation_blocked()
1119 			bd->old_entries = bd->entries;  in delegation_blocked()
1120 			bd->new = 1-bd->new;  in delegation_blocked()
1121 			memset(bd->set[bd->new], 0,  in delegation_blocked()
1122 			       sizeof(bd->set[0]));  in delegation_blocked()
1123 			bd->swap_time = ktime_get_seconds();  in delegation_blocked()
1127 	hash = jhash(&fh->fh_raw, fh->fh_size, 0);  in delegation_blocked()
1128 	if (test_bit(hash&255, bd->set[0]) &&  in delegation_blocked()
1129 	    test_bit((hash>>8)&255, bd->set[0]) &&  in delegation_blocked()
1130 	    test_bit((hash>>16)&255, bd->set[0]))  in delegation_blocked()
1133 	if (test_bit(hash&255, bd->set[1]) &&  in delegation_blocked()
1134 	    test_bit((hash>>8)&255, bd->set[1]) &&  in delegation_blocked()
1135 	    test_bit((hash>>16)&255, bd->set[1]))  in delegation_blocked()
1146 	hash = jhash(&fh->fh_raw, fh->fh_size, 0);  in block_delegations()
1149 	__set_bit(hash&255, bd->set[bd->new]);  in block_delegations()
1150 	__set_bit((hash>>8)&255, bd->set[bd->new]);  in block_delegations()
1151 	__set_bit((hash>>16)&255, bd->set[bd->new]);  in block_delegations()
1152 	if (bd->entries == 0)  in block_delegations()
1153 		bd->swap_time = ktime_get_seconds();  in block_delegations()
1154 	bd->entries += 1;  in block_delegations()
1169 	if (delegation_blocked(&fp->fi_fhandle))  in alloc_init_deleg()
1180 	dp->dl_stid.sc_stateid.si_generation = 1;  in alloc_init_deleg()
1181 	INIT_LIST_HEAD(&dp->dl_perfile);  in alloc_init_deleg()
1182 	INIT_LIST_HEAD(&dp->dl_perclnt);  in alloc_init_deleg()
1183 	INIT_LIST_HEAD(&dp->dl_recall_lru);  in alloc_init_deleg()
1184 	dp->dl_clnt_odstate = odstate;  in alloc_init_deleg()
1186 	dp->dl_type = dl_type;  in alloc_init_deleg()
1187 	dp->dl_retries = 1;  in alloc_init_deleg()
1188 	dp->dl_recalled = false;  in alloc_init_deleg()
1189 	nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,  in alloc_init_deleg()
1192 	dp->dl_stid.sc_file = fp;  in alloc_init_deleg()
1202 	struct nfs4_file *fp = s->sc_file;  in nfs4_put_stid()
1203 	struct nfs4_client *clp = s->sc_client;  in nfs4_put_stid()
1205 	might_lock(&clp->cl_lock);  in nfs4_put_stid()
1207 	if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) {  in nfs4_put_stid()
1211 	idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);  in nfs4_put_stid()
1212 	nfs4_free_cpntf_statelist(clp->net, s);  in nfs4_put_stid()
1213 	spin_unlock(&clp->cl_lock);  in nfs4_put_stid()
1214 	s->sc_free(s);  in nfs4_put_stid()
1222 	stateid_t *src = &stid->sc_stateid;  in nfs4_inc_and_copy_stateid()
1224 	spin_lock(&stid->sc_lock);  in nfs4_inc_and_copy_stateid()
1225 	if (unlikely(++src->si_generation == 0))  in nfs4_inc_and_copy_stateid()
1226 		src->si_generation = 1;  in nfs4_inc_and_copy_stateid()
1228 	spin_unlock(&stid->sc_lock);  in nfs4_inc_and_copy_stateid()
1235 	spin_lock(&fp->fi_lock);  in put_deleg_file()
1236 	if (--fp->fi_delegees == 0)  in put_deleg_file()
1237 		swap(nf, fp->fi_deleg_file);  in put_deleg_file()
1238 	spin_unlock(&fp->fi_lock);  in put_deleg_file()
1246 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in nfs4_unlock_deleg_lease()
1247 	struct nfsd_file *nf = fp->fi_deleg_file;  in nfs4_unlock_deleg_lease()
1249 	WARN_ON_ONCE(!fp->fi_delegees);  in nfs4_unlock_deleg_lease()
1251 	vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp);  in nfs4_unlock_deleg_lease()
1257 	put_clnt_odstate(dp->dl_clnt_odstate);  in destroy_unhashed_deleg()
1259 	nfs4_put_stid(&dp->dl_stid);  in destroy_unhashed_deleg()
1264 	s->sc_type = 0;  in nfs4_unhash_stid()
1268  * nfs4_delegation_exists - Discover if this delegation already exists
1283 	lockdep_assert_held(&fp->fi_lock);  in nfs4_delegation_exists()
1285 	list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {  in nfs4_delegation_exists()
1286 		searchclp = searchdp->dl_stid.sc_client;  in nfs4_delegation_exists()
1295  * hash_delegation_locked - Add a delegation to the appropriate lists
1302  *      On error: -EAGAIN if one was previously granted to this
1310 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in hash_delegation_locked()
1313 	lockdep_assert_held(&fp->fi_lock);  in hash_delegation_locked()
1316 		return -EAGAIN;  in hash_delegation_locked()
1317 	refcount_inc(&dp->dl_stid.sc_count);  in hash_delegation_locked()
1318 	dp->dl_stid.sc_type = NFS4_DELEG_STID;  in hash_delegation_locked()
1319 	list_add(&dp->dl_perfile, &fp->fi_delegations);  in hash_delegation_locked()
1320 	list_add(&dp->dl_perclnt, &clp->cl_delegations);  in hash_delegation_locked()
1326 	return !(list_empty(&dp->dl_perfile));  in delegation_hashed()
1332 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in unhash_delegation_locked()
1339 	dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;  in unhash_delegation_locked()
1341 	++dp->dl_time;  in unhash_delegation_locked()
1342 	spin_lock(&fp->fi_lock);  in unhash_delegation_locked()
1343 	list_del_init(&dp->dl_perclnt);  in unhash_delegation_locked()
1344 	list_del_init(&dp->dl_recall_lru);  in unhash_delegation_locked()
1345 	list_del_init(&dp->dl_perfile);  in unhash_delegation_locked()
1346 	spin_unlock(&fp->fi_lock);  in unhash_delegation_locked()
1363 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in revoke_delegation()
1365 	WARN_ON(!list_empty(&dp->dl_recall_lru));  in revoke_delegation()
1367 	trace_nfsd_stid_revoke(&dp->dl_stid);  in revoke_delegation()
1369 	if (clp->cl_minorversion) {  in revoke_delegation()
1370 		spin_lock(&clp->cl_lock);  in revoke_delegation()
1371 		dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;  in revoke_delegation()
1372 		refcount_inc(&dp->dl_stid.sc_count);  in revoke_delegation()
1373 		list_add(&dp->dl_recall_lru, &clp->cl_revoked);  in revoke_delegation()
1374 		spin_unlock(&clp->cl_lock);  in revoke_delegation()
1402 	spin_lock(&fp->fi_lock);  in recalculate_deny_mode()
1403 	fp->fi_share_deny = 0;  in recalculate_deny_mode()
1404 	list_for_each_entry(stp, &fp->fi_stateids, st_perfile)  in recalculate_deny_mode()
1405 		fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);  in recalculate_deny_mode()
1406 	spin_unlock(&fp->fi_lock);  in recalculate_deny_mode()
1422 	/* Recalculate per-file deny mode if there was a change */  in reset_union_bmap_deny()
1424 		recalculate_deny_mode(stp->st_stid.sc_file);  in reset_union_bmap_deny()
1432 	struct nfs4_file *fp = stp->st_stid.sc_file;  in release_all_access()
1434 	if (fp && stp->st_deny_bmap != 0)  in release_all_access()
1439 			nfs4_file_put_access(stp->st_stid.sc_file, i);  in release_all_access()
1446 	kfree(sop->so_owner.data);  in nfs4_free_stateowner()
1447 	sop->so_ops->so_free(sop);  in nfs4_free_stateowner()
1452 	struct nfs4_client *clp = sop->so_client;  in nfs4_put_stateowner()
1454 	might_lock(&clp->cl_lock);  in nfs4_put_stateowner()
1456 	if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))  in nfs4_put_stateowner()
1458 	sop->so_ops->so_unhash(sop);  in nfs4_put_stateowner()
1459 	spin_unlock(&clp->cl_lock);  in nfs4_put_stateowner()
1466 	return list_empty(&stp->st_perfile);  in nfs4_ol_stateid_unhashed()
1471 	struct nfs4_file *fp = stp->st_stid.sc_file;  in unhash_ol_stateid()
1473 	lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);  in unhash_ol_stateid()
1475 	if (list_empty(&stp->st_perfile))  in unhash_ol_stateid()
1478 	spin_lock(&fp->fi_lock);  in unhash_ol_stateid()
1479 	list_del_init(&stp->st_perfile);  in unhash_ol_stateid()
1480 	spin_unlock(&fp->fi_lock);  in unhash_ol_stateid()
1481 	list_del(&stp->st_perstateowner);  in unhash_ol_stateid()
1489 	put_clnt_odstate(stp->st_clnt_odstate);  in nfs4_free_ol_stateid()
1491 	if (stp->st_stateowner)  in nfs4_free_ol_stateid()
1492 		nfs4_put_stateowner(stp->st_stateowner);  in nfs4_free_ol_stateid()
1493 	WARN_ON(!list_empty(&stid->sc_cp_list));  in nfs4_free_ol_stateid()
1500 	struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);  in nfs4_free_lock_stateid()
1503 	nf = find_any_file(stp->st_stid.sc_file);  in nfs4_free_lock_stateid()
1505 		get_file(nf->nf_file);  in nfs4_free_lock_stateid()
1506 		filp_close(nf->nf_file, (fl_owner_t)lo);  in nfs4_free_lock_stateid()
1520 	struct nfs4_stid *s = &stp->st_stid;  in put_ol_stateid_locked()
1521 	struct nfs4_client *clp = s->sc_client;  in put_ol_stateid_locked()
1523 	lockdep_assert_held(&clp->cl_lock);  in put_ol_stateid_locked()
1525 	WARN_ON_ONCE(!list_empty(&stp->st_locks));  in put_ol_stateid_locked()
1527 	if (!refcount_dec_and_test(&s->sc_count)) {  in put_ol_stateid_locked()
1532 	idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);  in put_ol_stateid_locked()
1533 	list_add(&stp->st_locks, reaplist);  in put_ol_stateid_locked()
1538 	lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);  in unhash_lock_stateid()
1542 	list_del_init(&stp->st_locks);  in unhash_lock_stateid()
1543 	nfs4_unhash_stid(&stp->st_stid);  in unhash_lock_stateid()
1549 	struct nfs4_client *clp = stp->st_stid.sc_client;  in release_lock_stateid()
1552 	spin_lock(&clp->cl_lock);  in release_lock_stateid()
1554 	spin_unlock(&clp->cl_lock);  in release_lock_stateid()
1556 		nfs4_put_stid(&stp->st_stid);  in release_lock_stateid()
1561 	struct nfs4_client *clp = lo->lo_owner.so_client;  in unhash_lockowner_locked()
1563 	lockdep_assert_held(&clp->cl_lock);  in unhash_lockowner_locked()
1565 	list_del_init(&lo->lo_owner.so_strhash);  in unhash_lockowner_locked()
1583 		list_del(&stp->st_locks);  in free_ol_stateid_reaplist()
1584 		fp = stp->st_stid.sc_file;  in free_ol_stateid_reaplist()
1585 		stp->st_stid.sc_free(&stp->st_stid);  in free_ol_stateid_reaplist()
1596 	lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);  in release_open_stateid_locks()
1598 	while (!list_empty(&open_stp->st_locks)) {  in release_open_stateid_locks()
1599 		stp = list_entry(open_stp->st_locks.next,  in release_open_stateid_locks()
1609 	lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);  in unhash_open_stateid()
1621 	spin_lock(&stp->st_stid.sc_client->cl_lock);  in release_open_stateid()
1624 	spin_unlock(&stp->st_stid.sc_client->cl_lock);  in release_open_stateid()
1630 	lockdep_assert_held(&oo->oo_owner.so_client->cl_lock);  in nfs4_openowner_unhashed()
1632 	return list_empty(&oo->oo_owner.so_strhash) &&  in nfs4_openowner_unhashed()
1633 		list_empty(&oo->oo_perclient);  in nfs4_openowner_unhashed()
1638 	struct nfs4_client *clp = oo->oo_owner.so_client;  in unhash_openowner_locked()
1640 	lockdep_assert_held(&clp->cl_lock);  in unhash_openowner_locked()
1642 	list_del_init(&oo->oo_owner.so_strhash);  in unhash_openowner_locked()
1643 	list_del_init(&oo->oo_perclient);  in unhash_openowner_locked()
1648 	struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,  in release_last_closed_stateid()
1652 	spin_lock(&nn->client_lock);  in release_last_closed_stateid()
1653 	s = oo->oo_last_closed_stid;  in release_last_closed_stateid()
1655 		list_del_init(&oo->oo_close_lru);  in release_last_closed_stateid()
1656 		oo->oo_last_closed_stid = NULL;  in release_last_closed_stateid()
1658 	spin_unlock(&nn->client_lock);  in release_last_closed_stateid()
1660 		nfs4_put_stid(&s->st_stid);  in release_last_closed_stateid()
1666 	struct nfs4_client *clp = oo->oo_owner.so_client;  in release_openowner()
1671 	spin_lock(&clp->cl_lock);  in release_openowner()
1673 	while (!list_empty(&oo->oo_owner.so_stateids)) {  in release_openowner()
1674 		stp = list_first_entry(&oo->oo_owner.so_stateids,  in release_openowner()
1679 	spin_unlock(&clp->cl_lock);  in release_openowner()
1682 	nfs4_put_stateowner(&oo->oo_owner);  in release_openowner()
1690 	return sid->sequence % SESSION_HASH_SIZE;  in hash_sessionid()
1697 	u32 *ptr = (u32 *)(&sessionid->data[0]);  in dump_sessionid()
1708  * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1713 	struct nfs4_stateowner *so = cstate->replay_owner;  in nfsd4_bump_seqid()
1724 	if (so->so_is_open_owner)  in nfsd4_bump_seqid()
1726 	so->so_seqid++;  in nfsd4_bump_seqid()
1733 	struct nfs4_client *clp = ses->se_client;  in gen_sessionid()
1736 	sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;  in gen_sessionid()
1737 	sid->clientid = clp->cl_clientid;  in gen_sessionid()
1738 	sid->sequence = current_sessionid++;  in gen_sessionid()
1739 	sid->reserved = 0;  in gen_sessionid()
1745  * the end of the initial SEQUENCE operation--the rest we regenerate
1751  * verifier), 12 for the compound header (with zero-length tag), and 44
1761 	for (i = 0; i < ses->se_fchannel.maxreqs; i++) {  in free_session_slots()
1762 		free_svc_cred(&ses->se_slots[i]->sl_cred);  in free_session_slots()
1763 		kfree(ses->se_slots[i]);  in free_session_slots()
1775 	if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)  in slot_bytes()
1778 		size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;  in slot_bytes()
1784  * re-negotiate active sessions and reduce their slot usage to make
1790 	u32 num = ca->maxreqs;  in nfsd4_get_drc_mem()
1796 		total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used;  in nfsd4_get_drc_mem()
1812 	 * over-allocation--it is better than failure.  in nfsd4_get_drc_mem()
1814 	scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads);  in nfsd4_get_drc_mem()
1831 	nfsd_drc_mem_used -= slotsize * ca->maxreqs;  in nfsd4_put_drc_mem()
1838 	int numslots = fattrs->maxreqs;  in alloc_session()
1851 		new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);  in alloc_session()
1852 		if (!new->se_slots[i])  in alloc_session()
1856 	memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));  in alloc_session()
1857 	memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));  in alloc_session()
1861 	while (i--)  in alloc_session()
1862 		kfree(new->se_slots[i]);  in alloc_session()
1869 	svc_xprt_put(c->cn_xprt);  in free_conn()
1876 	struct nfs4_client *clp = c->cn_session->se_client;  in nfsd4_conn_lost()
1880 	spin_lock(&clp->cl_lock);  in nfsd4_conn_lost()
1881 	if (!list_empty(&c->cn_persession)) {  in nfsd4_conn_lost()
1882 		list_del(&c->cn_persession);  in nfsd4_conn_lost()
1886 	spin_unlock(&clp->cl_lock);  in nfsd4_conn_lost()
1896 	svc_xprt_get(rqstp->rq_xprt);  in alloc_conn()
1897 	conn->cn_xprt = rqstp->rq_xprt;  in alloc_conn()
1898 	conn->cn_flags = flags;  in alloc_conn()
1899 	INIT_LIST_HEAD(&conn->cn_xpt_user.list);  in alloc_conn()
1905 	conn->cn_session = ses;  in __nfsd4_hash_conn()
1906 	list_add(&conn->cn_persession, &ses->se_conns);  in __nfsd4_hash_conn()
1911 	struct nfs4_client *clp = ses->se_client;  in nfsd4_hash_conn()
1913 	spin_lock(&clp->cl_lock);  in nfsd4_hash_conn()
1915 	spin_unlock(&clp->cl_lock);  in nfsd4_hash_conn()
1920 	conn->cn_xpt_user.callback = nfsd4_conn_lost;  in nfsd4_register_conn()
1921 	return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);  in nfsd4_register_conn()
1932 		nfsd4_conn_lost(&conn->cn_xpt_user);  in nfsd4_init_conn()
1934 	nfsd4_probe_callback_sync(ses->se_client);  in nfsd4_init_conn()
1941 	if (cses->flags & SESSION4_BACK_CHAN)  in alloc_conn_from_crses()
1949 	struct nfs4_client *clp = s->se_client;  in nfsd4_del_conns()
1952 	spin_lock(&clp->cl_lock);  in nfsd4_del_conns()
1953 	while (!list_empty(&s->se_conns)) {  in nfsd4_del_conns()
1954 		c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);  in nfsd4_del_conns()
1955 		list_del_init(&c->cn_persession);  in nfsd4_del_conns()
1956 		spin_unlock(&clp->cl_lock);  in nfsd4_del_conns()
1958 		unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);  in nfsd4_del_conns()
1961 		spin_lock(&clp->cl_lock);  in nfsd4_del_conns()
1963 	spin_unlock(&clp->cl_lock);  in nfsd4_del_conns()
1975 	nfsd4_put_drc_mem(&ses->se_fchannel);  in free_session()
1984 	new->se_client = clp;  in init_session()
1987 	INIT_LIST_HEAD(&new->se_conns);  in init_session()
1989 	new->se_cb_seq_nr = 1;  in init_session()
1990 	new->se_flags = cses->flags;  in init_session()
1991 	new->se_cb_prog = cses->callback_prog;  in init_session()
1992 	new->se_cb_sec = cses->cb_sec;  in init_session()
1993 	atomic_set(&new->se_ref, 0);  in init_session()
1994 	idx = hash_sessionid(&new->se_sessionid);  in init_session()
1995 	list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);  in init_session()
1996 	spin_lock(&clp->cl_lock);  in init_session()
1997 	list_add(&new->se_perclnt, &clp->cl_sessions);  in init_session()
1998 	spin_unlock(&clp->cl_lock);  in init_session()
2009 		rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);  in init_session()
2010 		clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);  in init_session()
2022 	lockdep_assert_held(&nn->client_lock);  in __find_in_sessionid_hashtbl()
2027 	list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {  in __find_in_sessionid_hashtbl()
2028 		if (!memcmp(elem->se_sessionid.data, sessionid->data,  in __find_in_sessionid_hashtbl()
2060 	struct nfs4_client *clp = ses->se_client;  in unhash_session()
2061 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_session()
2063 	lockdep_assert_held(&nn->client_lock);  in unhash_session()
2065 	list_del(&ses->se_hash);  in unhash_session()
2066 	spin_lock(&ses->se_client->cl_lock);  in unhash_session()
2067 	list_del(&ses->se_perclnt);  in unhash_session()
2068 	spin_unlock(&ses->se_client->cl_lock);  in unhash_session()
2080 	if (clid->cl_boot == (u32)nn->boot_time)  in STALE_CLIENTID()
2097 	if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) {  in alloc_client()
2098 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in alloc_client()
2104 	xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);  in alloc_client()
2105 	if (clp->cl_name.data == NULL)  in alloc_client()
2107 	clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,  in alloc_client()
2110 	if (!clp->cl_ownerstr_hashtbl)  in alloc_client()
2113 		INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);  in alloc_client()
2114 	INIT_LIST_HEAD(&clp->cl_sessions);  in alloc_client()
2115 	idr_init(&clp->cl_stateids);  in alloc_client()
2116 	atomic_set(&clp->cl_rpc_users, 0);  in alloc_client()
2117 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in alloc_client()
2118 	clp->cl_state = NFSD4_ACTIVE;  in alloc_client()
2119 	atomic_inc(&nn->nfs4_client_count);  in alloc_client()
2120 	atomic_set(&clp->cl_delegs_in_recall, 0);  in alloc_client()
2121 	INIT_LIST_HEAD(&clp->cl_idhash);  in alloc_client()
2122 	INIT_LIST_HEAD(&clp->cl_openowners);  in alloc_client()
2123 	INIT_LIST_HEAD(&clp->cl_delegations);  in alloc_client()
2124 	INIT_LIST_HEAD(&clp->cl_lru);  in alloc_client()
2125 	INIT_LIST_HEAD(&clp->cl_revoked);  in alloc_client()
2127 	INIT_LIST_HEAD(&clp->cl_lo_states);  in alloc_client()
2129 	INIT_LIST_HEAD(&clp->async_copies);  in alloc_client()
2130 	spin_lock_init(&clp->async_lock);  in alloc_client()
2131 	spin_lock_init(&clp->cl_lock);  in alloc_client()
2132 	rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");  in alloc_client()
2135 	kfree(clp->cl_name.data);  in alloc_client()
2146 	free_svc_cred(&clp->cl_cred);  in __free_client()
2147 	kfree(clp->cl_ownerstr_hashtbl);  in __free_client()
2148 	kfree(clp->cl_name.data);  in __free_client()
2149 	kfree(clp->cl_nii_domain.data);  in __free_client()
2150 	kfree(clp->cl_nii_name.data);  in __free_client()
2151 	idr_destroy(&clp->cl_stateids);  in __free_client()
2152 	kfree(clp->cl_ra);  in __free_client()
2158 	kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);  in drop_client()
2164 	while (!list_empty(&clp->cl_sessions)) {  in free_client()
2166 		ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,  in free_client()
2168 		list_del(&ses->se_perclnt);  in free_client()
2169 		WARN_ON_ONCE(atomic_read(&ses->se_ref));  in free_client()
2172 	rpc_destroy_wait_queue(&clp->cl_cb_waitq);  in free_client()
2173 	if (clp->cl_nfsd_dentry) {  in free_client()
2174 		nfsd_client_rmdir(clp->cl_nfsd_dentry);  in free_client()
2175 		clp->cl_nfsd_dentry = NULL;  in free_client()
2185 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_client_locked()
2188 	lockdep_assert_held(&nn->client_lock);  in unhash_client_locked()
2191 	clp->cl_time = 0;  in unhash_client_locked()
2193 	if (!list_empty(&clp->cl_idhash)) {  in unhash_client_locked()
2194 		list_del_init(&clp->cl_idhash);  in unhash_client_locked()
2195 		if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))  in unhash_client_locked()
2196 			rb_erase(&clp->cl_namenode, &nn->conf_name_tree);  in unhash_client_locked()
2198 			rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);  in unhash_client_locked()
2200 	list_del_init(&clp->cl_lru);  in unhash_client_locked()
2201 	spin_lock(&clp->cl_lock);  in unhash_client_locked()
2202 	list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)  in unhash_client_locked()
2203 		list_del_init(&ses->se_hash);  in unhash_client_locked()
2204 	spin_unlock(&clp->cl_lock);  in unhash_client_locked()
2210 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_client()
2212 	spin_lock(&nn->client_lock);  in unhash_client()
2214 	spin_unlock(&nn->client_lock);  in unhash_client()
2219 	if (atomic_read(&clp->cl_rpc_users))  in mark_client_expired_locked()
2228 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in __destroy_client()
2236 	while (!list_empty(&clp->cl_delegations)) {  in __destroy_client()
2237 		dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);  in __destroy_client()
2239 		list_add(&dp->dl_recall_lru, &reaplist);  in __destroy_client()
2244 		list_del_init(&dp->dl_recall_lru);  in __destroy_client()
2247 	while (!list_empty(&clp->cl_revoked)) {  in __destroy_client()
2248 		dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);  in __destroy_client()
2249 		list_del_init(&dp->dl_recall_lru);  in __destroy_client()
2250 		nfs4_put_stid(&dp->dl_stid);  in __destroy_client()
2252 	while (!list_empty(&clp->cl_openowners)) {  in __destroy_client()
2253 		oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);  in __destroy_client()
2254 		nfs4_get_stateowner(&oo->oo_owner);  in __destroy_client()
2260 		list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i],  in __destroy_client()
2263 			WARN_ON_ONCE(so->so_is_open_owner);  in __destroy_client()
2270 	if (clp->cl_cb_conn.cb_xprt)  in __destroy_client()
2271 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);  in __destroy_client()
2272 	atomic_add_unless(&nn->nfs4_client_count, -1, 0);  in __destroy_client()
2287 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in inc_reclaim_complete()
2289 	if (!nn->track_reclaim_completes)  in inc_reclaim_complete()
2291 	if (!nfsd4_find_reclaim_client(clp->cl_name, nn))  in inc_reclaim_complete()
2293 	if (atomic_inc_return(&nn->nr_reclaim_complete) ==  in inc_reclaim_complete()
2294 			nn->reclaim_str_hashtbl_size) {  in inc_reclaim_complete()
2296 				clp->net->ns.inum);  in inc_reclaim_complete()
2310 	memcpy(target->cl_verifier.data, source->data,  in copy_verf()
2311 			sizeof(target->cl_verifier.data));  in copy_verf()
2316 	target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;   in copy_clid()
2317 	target->cl_clientid.cl_id = source->cl_clientid.cl_id;   in copy_clid()
2322 	target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL);  in copy_cred()
2323 	target->cr_raw_principal = kstrdup(source->cr_raw_principal,  in copy_cred()
2325 	target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL);  in copy_cred()
2326 	if ((source->cr_principal && !target->cr_principal) ||  in copy_cred()
2327 	    (source->cr_raw_principal && !target->cr_raw_principal) ||  in copy_cred()
2328 	    (source->cr_targ_princ && !target->cr_targ_princ))  in copy_cred()
2329 		return -ENOMEM;  in copy_cred()
2331 	target->cr_flavor = source->cr_flavor;  in copy_cred()
2332 	target->cr_uid = source->cr_uid;  in copy_cred()
2333 	target->cr_gid = source->cr_gid;  in copy_cred()
2334 	target->cr_group_info = source->cr_group_info;  in copy_cred()
2335 	get_group_info(target->cr_group_info);  in copy_cred()
2336 	target->cr_gss_mech = source->cr_gss_mech;  in copy_cred()
2337 	if (source->cr_gss_mech)  in copy_cred()
2338 		gss_mech_get(source->cr_gss_mech);  in copy_cred()
2345 	if (o1->len < o2->len)  in compare_blob()
2346 		return -1;  in compare_blob()
2347 	if (o1->len > o2->len)  in compare_blob()
2349 	return memcmp(o1->data, o2->data, o1->len);  in compare_blob()
2355 	return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));  in same_verf()
2361 	return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);  in same_clid()
2368 	if (g1->ngroups != g2->ngroups)  in groups_equal()
2370 	for (i=0; i<g1->ngroups; i++)  in groups_equal()
2371 		if (!gid_eq(g1->gid[i], g2->gid[i]))  in groups_equal()
2380  * approximation.  We also don't want to allow non-gss use of a client
2388 	return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);  in is_gss_cred()
2396 		|| (!uid_eq(cr1->cr_uid, cr2->cr_uid))  in same_creds()
2397 		|| (!gid_eq(cr1->cr_gid, cr2->cr_gid))  in same_creds()
2398 		|| !groups_equal(cr1->cr_group_info, cr2->cr_group_info))  in same_creds()
2401 	if (cr1->cr_principal == cr2->cr_principal)  in same_creds()
2403 	if (!cr1->cr_principal || !cr2->cr_principal)  in same_creds()
2405 	return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);  in same_creds()
2410 	struct svc_cred *cr = &rqstp->rq_cred;  in svc_rqst_integrity_protected()
2413 	if (!cr->cr_gss_mech)  in svc_rqst_integrity_protected()
2415 	service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);  in svc_rqst_integrity_protected()
2422 	struct svc_cred *cr = &rqstp->rq_cred;  in nfsd4_mach_creds_match()
2424 	if (!cl->cl_mach_cred)  in nfsd4_mach_creds_match()
2426 	if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)  in nfsd4_mach_creds_match()
2430 	if (cl->cl_cred.cr_raw_principal)  in nfsd4_mach_creds_match()
2431 		return 0 == strcmp(cl->cl_cred.cr_raw_principal,  in nfsd4_mach_creds_match()
2432 						cr->cr_raw_principal);  in nfsd4_mach_creds_match()
2433 	if (!cr->cr_principal)  in nfsd4_mach_creds_match()
2435 	return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);  in nfsd4_mach_creds_match()
2443 	 * This is opaque to client, so no need to byte-swap. Use  in gen_confirm()
2447 	verf[1] = (__force __be32)nn->clverifier_counter++;  in gen_confirm()
2448 	memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));  in gen_confirm()
2453 	clp->cl_clientid.cl_boot = (u32)nn->boot_time;  in gen_clid()
2454 	clp->cl_clientid.cl_id = nn->clientid_counter++;  in gen_clid()
2463 	ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);  in find_stateid_locked()
2464 	if (!ret || !ret->sc_type)  in find_stateid_locked()
2474 	spin_lock(&cl->cl_lock);  in find_stateid_by_type()
2477 		if (typemask & s->sc_type)  in find_stateid_by_type()
2478 			refcount_inc(&s->sc_count);  in find_stateid_by_type()
2482 	spin_unlock(&cl->cl_lock);  in find_stateid_by_type()
2519 	struct inode *inode = file_inode(m->file);  in client_info_show()
2525 		return -ENXIO;  in client_info_show()
2526 	memcpy(&clid, &clp->cl_clientid, sizeof(clid));  in client_info_show()
2528 	seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);  in client_info_show()
2530 	if (clp->cl_state == NFSD4_COURTESY)  in client_info_show()
2532 	else if (clp->cl_state == NFSD4_EXPIRABLE)  in client_info_show()
2534 	else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))  in client_info_show()
2539 		ktime_get_boottime_seconds() - clp->cl_time);  in client_info_show()
2541 	seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);  in client_info_show()
2542 	seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);  in client_info_show()
2543 	if (clp->cl_nii_domain.data) {  in client_info_show()
2545 		seq_quote_mem(m, clp->cl_nii_domain.data,  in client_info_show()
2546 					clp->cl_nii_domain.len);  in client_info_show()
2548 		seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);  in client_info_show()
2550 			clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);  in client_info_show()
2552 	seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state));  in client_info_show()
2553 	seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr);  in client_info_show()
2562 	__acquires(&clp->cl_lock)  in states_start()
2564 	struct nfs4_client *clp = s->private;  in states_start()
2568 	spin_lock(&clp->cl_lock);  in states_start()
2569 	ret = idr_get_next_ul(&clp->cl_stateids, &id);  in states_start()
2576 	struct nfs4_client *clp = s->private;  in states_next()
2582 	ret = idr_get_next_ul(&clp->cl_stateids, &id);  in states_next()
2588 	__releases(&clp->cl_lock)  in states_stop()
2590 	struct nfs4_client *clp = s->private;  in states_stop()
2592 	spin_unlock(&clp->cl_lock);  in states_stop()
2597          seq_printf(s, "filename: \"%pD2\"", f->nf_file);  in nfs4_show_fname()
2602 	struct inode *inode = file_inode(f->nf_file);  in nfs4_show_superblock()
2605 					MAJOR(inode->i_sb->s_dev),  in nfs4_show_superblock()
2606 					 MINOR(inode->i_sb->s_dev),  in nfs4_show_superblock()
2607 					 inode->i_ino);  in nfs4_show_superblock()
2613 	seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);  in nfs4_show_owner()
2618 	seq_printf(s, "0x%.8x", stid->si_generation);  in nfs4_show_stateid()
2619 	seq_printf(s, "%12phN", &stid->si_opaque);  in nfs4_show_stateid()
2630 	if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)  in nfs4_show_open()
2633 	oo = ols->st_stateowner;  in nfs4_show_open()
2634 	nf = st->sc_file;  in nfs4_show_open()
2636 	spin_lock(&nf->fi_lock);  in nfs4_show_open()
2641 	seq_printf(s, "- ");  in nfs4_show_open()
2642 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_open()
2645 	access = bmap_to_share_mode(ols->st_access_bmap);  in nfs4_show_open()
2646 	deny   = bmap_to_share_mode(ols->st_deny_bmap);  in nfs4_show_open()
2649 		access & NFS4_SHARE_ACCESS_READ ? "r" : "-",  in nfs4_show_open()
2650 		access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");  in nfs4_show_open()
2652 		deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",  in nfs4_show_open()
2653 		deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");  in nfs4_show_open()
2662 	spin_unlock(&nf->fi_lock);  in nfs4_show_open()
2674 	oo = ols->st_stateowner;  in nfs4_show_lock()
2675 	nf = st->sc_file;  in nfs4_show_lock()
2676 	spin_lock(&nf->fi_lock);  in nfs4_show_lock()
2681 	seq_printf(s, "- ");  in nfs4_show_lock()
2682 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_lock()
2700 	spin_unlock(&nf->fi_lock);  in nfs4_show_lock()
2711 	nf = st->sc_file;  in nfs4_show_deleg()
2712 	spin_lock(&nf->fi_lock);  in nfs4_show_deleg()
2713 	file = nf->fi_deleg_file;  in nfs4_show_deleg()
2717 	seq_printf(s, "- ");  in nfs4_show_deleg()
2718 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_deleg()
2723 		ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");  in nfs4_show_deleg()
2732 	spin_unlock(&nf->fi_lock);  in nfs4_show_deleg()
2742 	file = ls->ls_file;  in nfs4_show_layout()
2744 	seq_printf(s, "- ");  in nfs4_show_layout()
2745 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_layout()
2762 	switch (st->sc_type) {  in states_show()
2792 		return -ENXIO;  in client_states_open()
2797 	s = file->private_data;  in client_states_open()
2798 	s->private = clp;  in client_states_open()
2804 	struct seq_file *m = file->private_data;  in client_opens_release()
2805 	struct nfs4_client *clp = m->private;  in client_opens_release()
2827 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in force_expire_client()
2830 	trace_nfsd_clid_admin_expired(&clp->cl_clientid);  in force_expire_client()
2832 	spin_lock(&nn->client_lock);  in force_expire_client()
2833 	clp->cl_time = 0;  in force_expire_client()
2834 	spin_unlock(&nn->client_lock);  in force_expire_client()
2836 	wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);  in force_expire_client()
2837 	spin_lock(&nn->client_lock);  in force_expire_client()
2838 	already_expired = list_empty(&clp->cl_lru);  in force_expire_client()
2841 	spin_unlock(&nn->client_lock);  in force_expire_client()
2846 		wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);  in force_expire_client()
2859 		return -EINVAL;  in client_ctl_write()
2862 		return -ENXIO;  in client_ctl_write()
2885 	switch (task->tk_status) {  in nfsd4_cb_recall_any_done()
2886 	case -NFS4ERR_DELAY:  in nfsd4_cb_recall_any_done()
2897 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_recall_any_release()
2899 	clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);  in nfsd4_cb_recall_any_release()
2922 	ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);  in create_client()
2928 	kref_init(&clp->cl_nfsdfs.cl_ref);  in create_client()
2929 	nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);  in create_client()
2930 	clp->cl_time = ktime_get_boottime_seconds();  in create_client()
2931 	clear_bit(0, &clp->cl_cb_slot_busy);  in create_client()
2933 	memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));  in create_client()
2934 	clp->cl_cb_session = NULL;  in create_client()
2935 	clp->net = net;  in create_client()
2936 	clp->cl_nfsd_dentry = nfsd_client_mkdir(  in create_client()
2937 		nn, &clp->cl_nfsdfs,  in create_client()
2938 		clp->cl_clientid.cl_id - nn->clientid_base,  in create_client()
2940 	clp->cl_nfsd_info_dentry = dentries[0];  in create_client()
2941 	if (!clp->cl_nfsd_dentry) {  in create_client()
2945 	clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL);  in create_client()
2946 	if (!clp->cl_ra) {  in create_client()
2950 	clp->cl_ra_time = 0;  in create_client()
2951 	nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops,  in create_client()
2959 	struct rb_node **new = &(root->rb_node), *parent = NULL;  in add_clp_to_name_tree()
2966 		if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)  in add_clp_to_name_tree()
2967 			new = &((*new)->rb_left);  in add_clp_to_name_tree()
2969 			new = &((*new)->rb_right);  in add_clp_to_name_tree()
2972 	rb_link_node(&new_clp->cl_namenode, parent, new);  in add_clp_to_name_tree()
2973 	rb_insert_color(&new_clp->cl_namenode, root);  in add_clp_to_name_tree()
2980 	struct rb_node *node = root->rb_node;  in find_clp_in_name_tree()
2985 		cmp = compare_blob(&clp->cl_name, name);  in find_clp_in_name_tree()
2987 			node = node->rb_left;  in find_clp_in_name_tree()
2989 			node = node->rb_right;  in find_clp_in_name_tree()
3000 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in add_to_unconfirmed()
3002 	lockdep_assert_held(&nn->client_lock);  in add_to_unconfirmed()
3004 	clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);  in add_to_unconfirmed()
3005 	add_clp_to_name_tree(clp, &nn->unconf_name_tree);  in add_to_unconfirmed()
3006 	idhashval = clientid_hashval(clp->cl_clientid.cl_id);  in add_to_unconfirmed()
3007 	list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);  in add_to_unconfirmed()
3014 	unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);  in move_to_confirmed()
3015 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in move_to_confirmed()
3017 	lockdep_assert_held(&nn->client_lock);  in move_to_confirmed()
3019 	list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);  in move_to_confirmed()
3020 	rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);  in move_to_confirmed()
3021 	add_clp_to_name_tree(clp, &nn->conf_name_tree);  in move_to_confirmed()
3022 	set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);  in move_to_confirmed()
3023 	trace_nfsd_clid_confirmed(&clp->cl_clientid);  in move_to_confirmed()
3031 	unsigned int idhashval = clientid_hashval(clid->cl_id);  in find_client_in_id_table()
3034 		if (same_clid(&clp->cl_clientid, clid)) {  in find_client_in_id_table()
3035 			if ((bool)clp->cl_minorversion != sessions)  in find_client_in_id_table()
3047 	struct list_head *tbl = nn->conf_id_hashtbl;  in find_confirmed_client()
3049 	lockdep_assert_held(&nn->client_lock);  in find_confirmed_client()
3056 	struct list_head *tbl = nn->unconf_id_hashtbl;  in find_unconfirmed_client()
3058 	lockdep_assert_held(&nn->client_lock);  in find_unconfirmed_client()
3064 	return clp->cl_exchange_flags != 0;  in clp_used_exchangeid()
3070 	lockdep_assert_held(&nn->client_lock);  in find_confirmed_client_by_name()
3071 	return find_clp_in_name_tree(name, &nn->conf_name_tree);  in find_confirmed_client_by_name()
3077 	lockdep_assert_held(&nn->client_lock);  in find_unconfirmed_client_by_name()
3078 	return find_clp_in_name_tree(name, &nn->unconf_name_tree);  in find_unconfirmed_client_by_name()
3084 	struct nfs4_cb_conn *conn = &clp->cl_cb_conn;  in gen_callback()
3090 	if (se->se_callback_netid_len == 3 &&  in gen_callback()
3091 	    !memcmp(se->se_callback_netid_val, "tcp", 3))  in gen_callback()
3093 	else if (se->se_callback_netid_len == 4 &&  in gen_callback()
3094 		 !memcmp(se->se_callback_netid_val, "tcp6", 4))  in gen_callback()
3099 	conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,  in gen_callback()
3100 					    se->se_callback_addr_len,  in gen_callback()
3101 					    (struct sockaddr *)&conn->cb_addr,  in gen_callback()
3102 					    sizeof(conn->cb_addr));  in gen_callback()
3104 	if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)  in gen_callback()
3107 	if (conn->cb_addr.ss_family == AF_INET6)  in gen_callback()
3108 		((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;  in gen_callback()
3110 	conn->cb_prog = se->se_callback_prog;  in gen_callback()
3111 	conn->cb_ident = se->se_callback_ident;  in gen_callback()
3112 	memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);  in gen_callback()
3116 	conn->cb_addr.ss_family = AF_UNSPEC;  in gen_callback()
3117 	conn->cb_addrlen = 0;  in gen_callback()
3128 	struct xdr_buf *buf = resp->xdr->buf;  in nfsd4_store_cache_entry()
3129 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_store_cache_entry()
3132 	dprintk("--> %s slot %p\n", __func__, slot);  in nfsd4_store_cache_entry()
3134 	slot->sl_flags |= NFSD4_SLOT_INITIALIZED;  in nfsd4_store_cache_entry()
3135 	slot->sl_opcnt = resp->opcnt;  in nfsd4_store_cache_entry()
3136 	slot->sl_status = resp->cstate.status;  in nfsd4_store_cache_entry()
3137 	free_svc_cred(&slot->sl_cred);  in nfsd4_store_cache_entry()
3138 	copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred);  in nfsd4_store_cache_entry()
3141 		slot->sl_flags &= ~NFSD4_SLOT_CACHED;  in nfsd4_store_cache_entry()
3144 	slot->sl_flags |= NFSD4_SLOT_CACHED;  in nfsd4_store_cache_entry()
3146 	base = resp->cstate.data_offset;  in nfsd4_store_cache_entry()
3147 	slot->sl_datalen = buf->len - base;  in nfsd4_store_cache_entry()
3148 	if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))  in nfsd4_store_cache_entry()
3157  * operation which sets resp->p and increments resp->opcnt for
3166 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_enc_sequence_replay()
3169 	op = &args->ops[resp->opcnt - 1];  in nfsd4_enc_sequence_replay()
3172 	if (slot->sl_flags & NFSD4_SLOT_CACHED)  in nfsd4_enc_sequence_replay()
3173 		return op->status;  in nfsd4_enc_sequence_replay()
3174 	if (args->opcnt == 1) {  in nfsd4_enc_sequence_replay()
3176 		 * The original operation wasn't a solo sequence--we  in nfsd4_enc_sequence_replay()
3177 		 * always cache those--so this retry must not match the  in nfsd4_enc_sequence_replay()
3180 		op->status = nfserr_seq_false_retry;  in nfsd4_enc_sequence_replay()
3182 		op = &args->ops[resp->opcnt++];  in nfsd4_enc_sequence_replay()
3183 		op->status = nfserr_retry_uncached_rep;  in nfsd4_enc_sequence_replay()
3186 	return op->status;  in nfsd4_enc_sequence_replay()
3197 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_replay_cache_entry()
3198 	struct xdr_stream *xdr = resp->xdr;  in nfsd4_replay_cache_entry()
3202 	dprintk("--> %s slot %p\n", __func__, slot);  in nfsd4_replay_cache_entry()
3204 	status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);  in nfsd4_replay_cache_entry()
3208 	p = xdr_reserve_space(xdr, slot->sl_datalen);  in nfsd4_replay_cache_entry()
3213 	xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);  in nfsd4_replay_cache_entry()
3216 	resp->opcnt = slot->sl_opcnt;  in nfsd4_replay_cache_entry()
3217 	return slot->sl_status;  in nfsd4_replay_cache_entry()
3227 	new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;  in nfsd4_set_ex_flags()
3229 	new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;  in nfsd4_set_ex_flags()
3233 	new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;  in nfsd4_set_ex_flags()
3236 	clid->flags = new->cl_exchange_flags;  in nfsd4_set_ex_flags()
3243 	list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {  in client_has_openowners()
3244 		if (!list_empty(&oo->oo_owner.so_stateids))  in client_has_openowners()
3254 		|| !list_empty(&clp->cl_lo_states)  in client_has_state()
3256 		|| !list_empty(&clp->cl_delegations)  in client_has_state()
3257 		|| !list_empty(&clp->cl_sessions)  in client_has_state()
3258 		|| !list_empty(&clp->async_copies);  in client_has_state()
3264 	if (!exid->nii_domain.data)  in copy_impl_id()
3266 	xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);  in copy_impl_id()
3267 	if (!clp->cl_nii_domain.data)  in copy_impl_id()
3269 	xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);  in copy_impl_id()
3270 	if (!clp->cl_nii_name.data)  in copy_impl_id()
3272 	clp->cl_nii_time = exid->nii_time;  in copy_impl_id()
3280 	struct nfsd4_exchange_id *exid = &u->exchange_id;  in nfsd4_exchange_id()
3285 	nfs4_verifier		verf = exid->verifier;  in nfsd4_exchange_id()
3287 	bool	update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;  in nfsd4_exchange_id()
3293 		__func__, rqstp, exid, exid->clname.len, exid->clname.data,  in nfsd4_exchange_id()
3294 		addr_str, exid->flags, exid->spa_how);  in nfsd4_exchange_id()
3296 	if (exid->flags & ~EXCHGID4_FLAG_MASK_A)  in nfsd4_exchange_id()
3299 	new = create_client(exid->clname, rqstp, &verf);  in nfsd4_exchange_id()
3306 	switch (exid->spa_how) {  in nfsd4_exchange_id()
3308 		exid->spo_must_enforce[0] = 0;  in nfsd4_exchange_id()
3309 		exid->spo_must_enforce[1] = (  in nfsd4_exchange_id()
3310 			1 << (OP_BIND_CONN_TO_SESSION - 32) |  in nfsd4_exchange_id()
3311 			1 << (OP_EXCHANGE_ID - 32) |  in nfsd4_exchange_id()
3312 			1 << (OP_CREATE_SESSION - 32) |  in nfsd4_exchange_id()
3313 			1 << (OP_DESTROY_SESSION - 32) |  in nfsd4_exchange_id()
3314 			1 << (OP_DESTROY_CLIENTID - 32));  in nfsd4_exchange_id()
3316 		exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |  in nfsd4_exchange_id()
3321 		exid->spo_must_allow[1] &= (  in nfsd4_exchange_id()
3322 					1 << (OP_TEST_STATEID - 32) |  in nfsd4_exchange_id()
3323 					1 << (OP_FREE_STATEID - 32));  in nfsd4_exchange_id()
3333 		if (!new->cl_cred.cr_principal &&  in nfsd4_exchange_id()
3334 					!new->cl_cred.cr_raw_principal) {  in nfsd4_exchange_id()
3338 		new->cl_mach_cred = true;  in nfsd4_exchange_id()
3351 	spin_lock(&nn->client_lock);  in nfsd4_exchange_id()
3352 	conf = find_confirmed_client_by_name(&exid->clname, nn);  in nfsd4_exchange_id()
3354 		bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);  in nfsd4_exchange_id()
3355 		bool verfs_match = same_verf(&verf, &conf->cl_verifier);  in nfsd4_exchange_id()
3375 			exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;  in nfsd4_exchange_id()
3388 			conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;  in nfsd4_exchange_id()
3403 	unconf = find_unconfirmed_client_by_name(&exid->clname, nn);  in nfsd4_exchange_id()
3415 		trace_nfsd_clid_replaced(&conf->cl_clientid);  in nfsd4_exchange_id()
3417 	new->cl_minorversion = cstate->minorversion;  in nfsd4_exchange_id()
3418 	new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];  in nfsd4_exchange_id()
3419 	new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];  in nfsd4_exchange_id()
3424 	exid->clientid.cl_boot = conf->cl_clientid.cl_boot;  in nfsd4_exchange_id()
3425 	exid->clientid.cl_id = conf->cl_clientid.cl_id;  in nfsd4_exchange_id()
3427 	exid->seqid = conf->cl_cs_slot.sl_seqid + 1;  in nfsd4_exchange_id()
3431 		conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);  in nfsd4_exchange_id()
3435 	spin_unlock(&nn->client_lock);  in nfsd4_exchange_id()
3440 		trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);  in nfsd4_exchange_id()
3459 	/* Note unsigned 32-bit arithmetic handles wraparound: */  in check_slot_seqid()
3470  * Do this for solo or embedded create session operations.
3476 	slot->sl_status = nfserr;  in nfsd4_cache_create_session()
3477 	memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));  in nfsd4_cache_create_session()
3484 	memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));  in nfsd4_replay_create_session()
3485 	return slot->sl_status;  in nfsd4_replay_create_session()
3507 	u32 maxrpc = nn->nfsd_serv->sv_max_mesg;  in check_forechannel_attrs()
3509 	if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)  in check_forechannel_attrs()
3511 	if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)  in check_forechannel_attrs()
3513 	ca->headerpadsz = 0;  in check_forechannel_attrs()
3514 	ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);  in check_forechannel_attrs()
3515 	ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);  in check_forechannel_attrs()
3516 	ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);  in check_forechannel_attrs()
3517 	ca->maxresp_cached = min_t(u32, ca->maxresp_cached,  in check_forechannel_attrs()
3519 	ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);  in check_forechannel_attrs()
3530 	ca->maxreqs = nfsd4_get_drc_mem(ca, nn);  in check_forechannel_attrs()
3536  * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
3553 	ca->headerpadsz = 0;  in check_backchannel_attrs()
3555 	if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)  in check_backchannel_attrs()
3557 	if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)  in check_backchannel_attrs()
3559 	ca->maxresp_cached = 0;  in check_backchannel_attrs()
3560 	if (ca->maxops < 2)  in check_backchannel_attrs()
3568 	switch (cbs->flavor) {  in nfsd4_check_cb_sec()
3588 	struct nfsd4_create_session *cr_ses = &u->create_session;  in nfsd4_create_session()
3598 	if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)  in nfsd4_create_session()
3600 	status = nfsd4_check_cb_sec(&cr_ses->cb_sec);  in nfsd4_create_session()
3603 	status = check_forechannel_attrs(&cr_ses->fore_channel, nn);  in nfsd4_create_session()
3606 	status = check_backchannel_attrs(&cr_ses->back_channel);  in nfsd4_create_session()
3610 	new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);  in nfsd4_create_session()
3617 	spin_lock(&nn->client_lock);  in nfsd4_create_session()
3618 	unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);  in nfsd4_create_session()
3619 	conf = find_confirmed_client(&cr_ses->clientid, true, nn);  in nfsd4_create_session()
3626 		cs_slot = &conf->cl_cs_slot;  in nfsd4_create_session()
3627 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);  in nfsd4_create_session()
3635 		if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||  in nfsd4_create_session()
3636 		    !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {  in nfsd4_create_session()
3643 		cs_slot = &unconf->cl_cs_slot;  in nfsd4_create_session()
3644 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);  in nfsd4_create_session()
3650 		old = find_confirmed_client_by_name(&unconf->cl_name, nn);  in nfsd4_create_session()
3657 			trace_nfsd_clid_replaced(&old->cl_clientid);  in nfsd4_create_session()
3667 	cr_ses->flags &= ~SESSION4_PERSIST;  in nfsd4_create_session()
3669 	cr_ses->flags &= ~SESSION4_RDMA;  in nfsd4_create_session()
3674 	memcpy(cr_ses->sessionid.data, new->se_sessionid.data,  in nfsd4_create_session()
3676 	cs_slot->sl_seqid++;  in nfsd4_create_session()
3677 	cr_ses->seqid = cs_slot->sl_seqid;  in nfsd4_create_session()
3679 	/* cache solo and embedded create sessions under the client_lock */  in nfsd4_create_session()
3681 	spin_unlock(&nn->client_lock);  in nfsd4_create_session()
3683 		fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);  in nfsd4_create_session()
3691 	spin_unlock(&nn->client_lock);  in nfsd4_create_session()
3698 	nfsd4_put_drc_mem(&cr_ses->fore_channel);  in nfsd4_create_session()
3720 	struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;  in nfsd4_backchannel_ctl()
3721 	struct nfsd4_session *session = cstate->session;  in nfsd4_backchannel_ctl()
3725 	status = nfsd4_check_cb_sec(&bc->bc_cb_sec);  in nfsd4_backchannel_ctl()
3728 	spin_lock(&nn->client_lock);  in nfsd4_backchannel_ctl()
3729 	session->se_cb_prog = bc->bc_cb_program;  in nfsd4_backchannel_ctl()
3730 	session->se_cb_sec = bc->bc_cb_sec;  in nfsd4_backchannel_ctl()
3731 	spin_unlock(&nn->client_lock);  in nfsd4_backchannel_ctl()
3733 	nfsd4_probe_callback(session->se_client);  in nfsd4_backchannel_ctl()
3742 	list_for_each_entry(c, &s->se_conns, cn_persession) {  in __nfsd4_find_conn()
3743 		if (c->cn_xprt == xpt) {  in __nfsd4_find_conn()
3753 	struct nfs4_client *clp = session->se_client;  in nfsd4_match_existing_connection()
3754 	struct svc_xprt *xpt = rqst->rq_xprt;  in nfsd4_match_existing_connection()
3759 	spin_lock(&clp->cl_lock);  in nfsd4_match_existing_connection()
3763 	else if (req == c->cn_flags)  in nfsd4_match_existing_connection()
3766 				c->cn_flags != NFS4_CDFC4_BACK)  in nfsd4_match_existing_connection()
3769 				c->cn_flags != NFS4_CDFC4_FORE)  in nfsd4_match_existing_connection()
3773 	spin_unlock(&clp->cl_lock);  in nfsd4_match_existing_connection()
3783 	struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;  in nfsd4_bind_conn_to_session()
3792 	spin_lock(&nn->client_lock);  in nfsd4_bind_conn_to_session()
3793 	session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);  in nfsd4_bind_conn_to_session()
3794 	spin_unlock(&nn->client_lock);  in nfsd4_bind_conn_to_session()
3798 	if (!nfsd4_mach_creds_match(session->se_client, rqstp))  in nfsd4_bind_conn_to_session()
3801 			bcts->dir, &conn);  in nfsd4_bind_conn_to_session()
3803 		if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH ||  in nfsd4_bind_conn_to_session()
3804 				bcts->dir == NFS4_CDFC4_BACK)  in nfsd4_bind_conn_to_session()
3805 			conn->cn_flags |= NFS4_CDFC4_BACK;  in nfsd4_bind_conn_to_session()
3806 		nfsd4_probe_callback(session->se_client);  in nfsd4_bind_conn_to_session()
3811 	status = nfsd4_map_bcts_dir(&bcts->dir);  in nfsd4_bind_conn_to_session()
3814 	conn = alloc_conn(rqstp, bcts->dir);  in nfsd4_bind_conn_to_session()
3828 	if (!cstate->session)  in nfsd4_compound_in_session()
3830 	return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid));  in nfsd4_compound_in_session()
3837 	struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid;  in nfsd4_destroy_session()
3851 	spin_lock(&nn->client_lock);  in nfsd4_destroy_session()
3856 	if (!nfsd4_mach_creds_match(ses->se_client, r))  in nfsd4_destroy_session()
3862 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_session()
3864 	nfsd4_probe_callback_sync(ses->se_client);  in nfsd4_destroy_session()
3866 	spin_lock(&nn->client_lock);  in nfsd4_destroy_session()
3871 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_session()
3878 	struct nfs4_client *clp = ses->se_client;  in nfsd4_sequence_check_conn()
3883 	spin_lock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3884 	c = __nfsd4_find_conn(new->cn_xprt, ses);  in nfsd4_sequence_check_conn()
3888 	if (clp->cl_mach_cred)  in nfsd4_sequence_check_conn()
3891 	spin_unlock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3895 		nfsd4_conn_lost(&new->cn_xpt_user);  in nfsd4_sequence_check_conn()
3898 	spin_unlock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3905 	struct nfsd4_compoundargs *args = rqstp->rq_argp;  in nfsd4_session_too_many_ops()
3907 	return args->opcnt > session->se_fchannel.maxops;  in nfsd4_session_too_many_ops()
3913 	struct xdr_buf *xb = &rqstp->rq_arg;  in nfsd4_request_too_big()
3915 	return xb->len > session->se_fchannel.maxreq_sz;  in nfsd4_request_too_big()
3921 	struct nfsd4_compoundargs *argp = rqstp->rq_argp;  in replay_matches_cache()
3923 	if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) !=  in replay_matches_cache()
3924 	    (bool)seq->cachethis)  in replay_matches_cache()
3930 	if (slot->sl_opcnt < argp->opcnt && !slot->sl_status)  in replay_matches_cache()
3937 	if (slot->sl_opcnt > argp->opcnt)  in replay_matches_cache()
3940 	if (!same_creds(&rqstp->rq_cred, &slot->sl_cred))  in replay_matches_cache()
3955 	struct nfsd4_sequence *seq = &u->sequence;  in nfsd4_sequence()
3956 	struct nfsd4_compoundres *resp = rqstp->rq_resp;  in nfsd4_sequence()
3957 	struct xdr_stream *xdr = resp->xdr;  in nfsd4_sequence()
3967 	if (resp->opcnt != 1)  in nfsd4_sequence()
3978 	spin_lock(&nn->client_lock);  in nfsd4_sequence()
3979 	session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);  in nfsd4_sequence()
3982 	clp = session->se_client;  in nfsd4_sequence()
3993 	if (seq->slotid >= session->se_fchannel.maxreqs)  in nfsd4_sequence()
3996 	slot = session->se_slots[seq->slotid];  in nfsd4_sequence()
3997 	dprintk("%s: slotid %d\n", __func__, seq->slotid);  in nfsd4_sequence()
4002 	seq->maxslots = session->se_fchannel.maxreqs;  in nfsd4_sequence()
4004 	status = check_slot_seqid(seq->seqid, slot->sl_seqid,  in nfsd4_sequence()
4005 					slot->sl_flags & NFSD4_SLOT_INUSE);  in nfsd4_sequence()
4008 		if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))  in nfsd4_sequence()
4013 		cstate->slot = slot;  in nfsd4_sequence()
4014 		cstate->session = session;  in nfsd4_sequence()
4015 		cstate->clp = clp;  in nfsd4_sequence()
4016 		/* Return the cached reply status and set cstate->status  in nfsd4_sequence()
4019 		cstate->status = nfserr_replay_cache;  in nfsd4_sequence()
4030 	buflen = (seq->cachethis) ?  in nfsd4_sequence()
4031 			session->se_fchannel.maxresp_cached :  in nfsd4_sequence()
4032 			session->se_fchannel.maxresp_sz;  in nfsd4_sequence()
4033 	status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :  in nfsd4_sequence()
4035 	if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))  in nfsd4_sequence()
4041 	slot->sl_seqid = seq->seqid;  in nfsd4_sequence()
4042 	slot->sl_flags |= NFSD4_SLOT_INUSE;  in nfsd4_sequence()
4043 	if (seq->cachethis)  in nfsd4_sequence()
4044 		slot->sl_flags |= NFSD4_SLOT_CACHETHIS;  in nfsd4_sequence()
4046 		slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;  in nfsd4_sequence()
4048 	cstate->slot = slot;  in nfsd4_sequence()
4049 	cstate->session = session;  in nfsd4_sequence()
4050 	cstate->clp = clp;  in nfsd4_sequence()
4053 	switch (clp->cl_cb_state) {  in nfsd4_sequence()
4055 		seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;  in nfsd4_sequence()
4058 		seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;  in nfsd4_sequence()
4061 		seq->status_flags = 0;  in nfsd4_sequence()
4063 	if (!list_empty(&clp->cl_revoked))  in nfsd4_sequence()
4064 		seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;  in nfsd4_sequence()
4068 	spin_unlock(&nn->client_lock);  in nfsd4_sequence()
4078 	struct nfsd4_compound_state *cs = &resp->cstate;  in nfsd4_sequence_done()
4081 		if (cs->status != nfserr_replay_cache) {  in nfsd4_sequence_done()
4083 			cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;  in nfsd4_sequence_done()
4086 		nfsd4_put_session(cs->session);  in nfsd4_sequence_done()
4087 	} else if (cs->clp)  in nfsd4_sequence_done()
4088 		put_client_renew(cs->clp);  in nfsd4_sequence_done()
4096 	struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;  in nfsd4_destroy_clientid()
4102 	spin_lock(&nn->client_lock);  in nfsd4_destroy_clientid()
4103 	unconf = find_unconfirmed_client(&dc->clientid, true, nn);  in nfsd4_destroy_clientid()
4104 	conf = find_confirmed_client(&dc->clientid, true, nn);  in nfsd4_destroy_clientid()
4127 	trace_nfsd_clid_destroyed(&clp->cl_clientid);  in nfsd4_destroy_clientid()
4130 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_clientid()
4140 	struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;  in nfsd4_reclaim_complete()
4141 	struct nfs4_client *clp = cstate->clp;  in nfsd4_reclaim_complete()
4144 	if (rc->rca_one_fs) {  in nfsd4_reclaim_complete()
4145 		if (!cstate->current_fh.fh_dentry)  in nfsd4_reclaim_complete()
4155 	if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))  in nfsd4_reclaim_complete()
4170 	trace_nfsd_clid_reclaim_complete(&clp->cl_clientid);  in nfsd4_reclaim_complete()
4181 	struct nfsd4_setclientid *setclid = &u->setclientid;  in nfsd4_setclientid()
4182 	struct xdr_netobj 	clname = setclid->se_name;  in nfsd4_setclientid()
4183 	nfs4_verifier		clverifier = setclid->se_verf;  in nfsd4_setclientid()
4192 	spin_lock(&nn->client_lock);  in nfsd4_setclientid()
4198 		if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid()
4207 		if (same_verf(&conf->cl_verifier, &clverifier)) {  in nfsd4_setclientid()
4215 	new->cl_minorversion = 0;  in nfsd4_setclientid()
4218 	setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;  in nfsd4_setclientid()
4219 	setclid->se_clientid.cl_id = new->cl_clientid.cl_id;  in nfsd4_setclientid()
4220 	memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));  in nfsd4_setclientid()
4224 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid()
4228 		trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);  in nfsd4_setclientid()
4240 			&u->setclientid_confirm;  in nfsd4_setclientid_confirm()
4243 	nfs4_verifier confirm = setclientid_confirm->sc_confirm;   in nfsd4_setclientid_confirm()
4244 	clientid_t * clid = &setclientid_confirm->sc_clientid;  in nfsd4_setclientid_confirm()
4251 	spin_lock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4262 	if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid_confirm()
4266 	if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid_confirm()
4270 	if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {  in nfsd4_setclientid_confirm()
4271 		if (conf && same_verf(&confirm, &conf->cl_confirm)) {  in nfsd4_setclientid_confirm()
4281 		nfsd4_change_callback(conf, &unconf->cl_cb_conn);  in nfsd4_setclientid_confirm()
4283 		old = find_confirmed_client_by_name(&unconf->cl_name, nn);  in nfsd4_setclientid_confirm()
4287 					&& !same_creds(&unconf->cl_cred,  in nfsd4_setclientid_confirm()
4288 							&old->cl_cred)) {  in nfsd4_setclientid_confirm()
4297 			trace_nfsd_clid_replaced(&old->cl_clientid);  in nfsd4_setclientid_confirm()
4303 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4305 		fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);  in nfsd4_setclientid_confirm()
4307 	spin_lock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4310 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4325 	refcount_set(&fp->fi_ref, 1);  in nfsd4_file_init()
4326 	spin_lock_init(&fp->fi_lock);  in nfsd4_file_init()
4327 	INIT_LIST_HEAD(&fp->fi_stateids);  in nfsd4_file_init()
4328 	INIT_LIST_HEAD(&fp->fi_delegations);  in nfsd4_file_init()
4329 	INIT_LIST_HEAD(&fp->fi_clnt_odstate);  in nfsd4_file_init()
4330 	fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle);  in nfsd4_file_init()
4331 	fp->fi_deleg_file = NULL;  in nfsd4_file_init()
4332 	fp->fi_had_conflict = false;  in nfsd4_file_init()
4333 	fp->fi_share_deny = 0;  in nfsd4_file_init()
4334 	memset(fp->fi_fds, 0, sizeof(fp->fi_fds));  in nfsd4_file_init()
4335 	memset(fp->fi_access, 0, sizeof(fp->fi_access));  in nfsd4_file_init()
4336 	fp->fi_aliased = false;  in nfsd4_file_init()
4337 	fp->fi_inode = d_inode(fh->fh_dentry);  in nfsd4_file_init()
4339 	INIT_LIST_HEAD(&fp->fi_lo_states);  in nfsd4_file_init()
4340 	atomic_set(&fp->fi_lo_recalls, 0);  in nfsd4_file_init()
4402 	return -ENOMEM;  in nfsd4_init_slabs()
4412 	count = atomic_read(&nn->nfsd_courtesy_clients);  in nfsd4_state_shrinker_count()
4416 		queue_work(laundry_wq, &nn->nfsd_shrinker_work);  in nfsd4_state_shrinker_count()
4432 	nn->nfsd4_lease = 90;	/* default lease time */  in nfsd4_init_leases_net()
4433 	nn->nfsd4_grace = 90;  in nfsd4_init_leases_net()
4434 	nn->somebody_reclaimed = false;  in nfsd4_init_leases_net()
4435 	nn->track_reclaim_completes = false;  in nfsd4_init_leases_net()
4436 	nn->clverifier_counter = get_random_u32();  in nfsd4_init_leases_net()
4437 	nn->clientid_base = get_random_u32();  in nfsd4_init_leases_net()
4438 	nn->clientid_counter = nn->clientid_base + 1;  in nfsd4_init_leases_net()
4439 	nn->s2s_cp_cl_id = nn->clientid_counter++;  in nfsd4_init_leases_net()
4441 	atomic_set(&nn->nfs4_client_count, 0);  in nfsd4_init_leases_net()
4445 	nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB);  in nfsd4_init_leases_net()
4447 	atomic_set(&nn->nfsd_courtesy_clients, 0);  in nfsd4_init_leases_net()
4452 	rp->rp_status = nfserr_serverfault;  in init_nfs4_replay()
4453 	rp->rp_buflen = 0;  in init_nfs4_replay()
4454 	rp->rp_buf = rp->rp_ibuf;  in init_nfs4_replay()
4455 	mutex_init(&rp->rp_mutex);  in init_nfs4_replay()
4462 		mutex_lock(&so->so_replay.rp_mutex);  in nfsd4_cstate_assign_replay()
4463 		cstate->replay_owner = nfs4_get_stateowner(so);  in nfsd4_cstate_assign_replay()
4469 	struct nfs4_stateowner *so = cstate->replay_owner;  in nfsd4_cstate_clear_replay()
4472 		cstate->replay_owner = NULL;  in nfsd4_cstate_clear_replay()
4473 		mutex_unlock(&so->so_replay.rp_mutex);  in nfsd4_cstate_clear_replay()
4486 	xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);  in alloc_stateowner()
4487 	if (!sop->so_owner.data) {  in alloc_stateowner()
4492 	INIT_LIST_HEAD(&sop->so_stateids);  in alloc_stateowner()
4493 	sop->so_client = clp;  in alloc_stateowner()
4494 	init_nfs4_replay(&sop->so_replay);  in alloc_stateowner()
4495 	atomic_set(&sop->so_count, 1);  in alloc_stateowner()
4501 	lockdep_assert_held(&clp->cl_lock);  in hash_openowner()
4503 	list_add(&oo->oo_owner.so_strhash,  in hash_openowner()
4504 		 &clp->cl_ownerstr_hashtbl[strhashval]);  in hash_openowner()
4505 	list_add(&oo->oo_perclient, &clp->cl_openowners);  in hash_openowner()
4529 	struct nfs4_openowner *oo = open->op_openowner;  in nfsd4_find_existing_open()
4531 	lockdep_assert_held(&fp->fi_lock);  in nfsd4_find_existing_open()
4533 	list_for_each_entry(local, &fp->fi_stateids, st_perfile) {  in nfsd4_find_existing_open()
4535 		if (local->st_stateowner->so_is_open_owner == 0)  in nfsd4_find_existing_open()
4537 		if (local->st_stateowner != &oo->oo_owner)  in nfsd4_find_existing_open()
4539 		if (local->st_stid.sc_type == NFS4_OPEN_STID) {  in nfsd4_find_existing_open()
4541 			refcount_inc(&ret->st_stid.sc_count);  in nfsd4_find_existing_open()
4553 	switch (s->sc_type) {  in nfsd4_verify_open_stid()
4573 	mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX);  in nfsd4_lock_ol_stateid()
4574 	ret = nfsd4_verify_open_stid(&stp->st_stid);  in nfsd4_lock_ol_stateid()
4576 		mutex_unlock(&stp->st_mutex);  in nfsd4_lock_ol_stateid()
4585 		spin_lock(&fp->fi_lock);  in nfsd4_find_and_lock_existing_open()
4587 		spin_unlock(&fp->fi_lock);  in nfsd4_find_and_lock_existing_open()
4590 		nfs4_put_stid(&stp->st_stid);  in nfsd4_find_and_lock_existing_open()
4599 	struct nfs4_client *clp = cstate->clp;  in alloc_init_open_stateowner()
4602 	oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);  in alloc_init_open_stateowner()
4605 	oo->oo_owner.so_ops = &openowner_ops;  in alloc_init_open_stateowner()
4606 	oo->oo_owner.so_is_open_owner = 1;  in alloc_init_open_stateowner()
4607 	oo->oo_owner.so_seqid = open->op_seqid;  in alloc_init_open_stateowner()
4608 	oo->oo_flags = 0;  in alloc_init_open_stateowner()
4610 		oo->oo_flags |= NFS4_OO_CONFIRMED;  in alloc_init_open_stateowner()
4611 	oo->oo_time = 0;  in alloc_init_open_stateowner()
4612 	oo->oo_last_closed_stid = NULL;  in alloc_init_open_stateowner()
4613 	INIT_LIST_HEAD(&oo->oo_close_lru);  in alloc_init_open_stateowner()
4614 	spin_lock(&clp->cl_lock);  in alloc_init_open_stateowner()
4620 		nfs4_free_stateowner(&oo->oo_owner);  in alloc_init_open_stateowner()
4622 	spin_unlock(&clp->cl_lock);  in alloc_init_open_stateowner()
4630 	struct nfs4_openowner *oo = open->op_openowner;  in init_open_stateid()
4634 	stp = open->op_stp;  in init_open_stateid()
4636 	mutex_init(&stp->st_mutex);  in init_open_stateid()
4637 	mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);  in init_open_stateid()
4640 	spin_lock(&oo->oo_owner.so_client->cl_lock);  in init_open_stateid()
4641 	spin_lock(&fp->fi_lock);  in init_open_stateid()
4644 		mutex_unlock(&stp->st_mutex);  in init_open_stateid()
4653 	open->op_stp = NULL;  in init_open_stateid()
4654 	refcount_inc(&stp->st_stid.sc_count);  in init_open_stateid()
4655 	stp->st_stid.sc_type = NFS4_OPEN_STID;  in init_open_stateid()
4656 	INIT_LIST_HEAD(&stp->st_locks);  in init_open_stateid()
4657 	stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);  in init_open_stateid()
4659 	stp->st_stid.sc_file = fp;  in init_open_stateid()
4660 	stp->st_access_bmap = 0;  in init_open_stateid()
4661 	stp->st_deny_bmap = 0;  in init_open_stateid()
4662 	stp->st_openstp = NULL;  in init_open_stateid()
4663 	list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);  in init_open_stateid()
4664 	list_add(&stp->st_perfile, &fp->fi_stateids);  in init_open_stateid()
4667 	spin_unlock(&fp->fi_lock);  in init_open_stateid()
4668 	spin_unlock(&oo->oo_owner.so_client->cl_lock);  in init_open_stateid()
4672 			nfs4_put_stid(&retstp->st_stid);  in init_open_stateid()
4676 		mutex_unlock(&stp->st_mutex);  in init_open_stateid()
4691 	struct nfs4_openowner *oo = openowner(s->st_stateowner);  in move_to_close_lru()
4692 	struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,  in move_to_close_lru()
4706 	wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2);  in move_to_close_lru()
4709 	if (s->st_stid.sc_file) {  in move_to_close_lru()
4710 		put_nfs4_file(s->st_stid.sc_file);  in move_to_close_lru()
4711 		s->st_stid.sc_file = NULL;  in move_to_close_lru()
4714 	spin_lock(&nn->client_lock);  in move_to_close_lru()
4715 	last = oo->oo_last_closed_stid;  in move_to_close_lru()
4716 	oo->oo_last_closed_stid = s;  in move_to_close_lru()
4717 	list_move_tail(&oo->oo_close_lru, &nn->close_lru);  in move_to_close_lru()
4718 	oo->oo_time = ktime_get_boottime_seconds();  in move_to_close_lru()
4719 	spin_unlock(&nn->client_lock);  in move_to_close_lru()
4721 		nfs4_put_stid(&last->st_stid);  in move_to_close_lru()
4727 	struct inode *inode = d_inode(fhp->fh_dentry);  in nfsd4_file_hash_lookup()
4735 		if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {  in nfsd4_file_hash_lookup()
4736 			if (refcount_inc_not_zero(&fi->fi_ref)) {  in nfsd4_file_hash_lookup()
4751  * inode->i_lock prevents racing insertions from adding an entry
4757 	struct inode *inode = d_inode(fhp->fh_dentry);  in nfsd4_file_hash_insert()
4765 	spin_lock(&inode->i_lock);  in nfsd4_file_hash_insert()
4770 		if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {  in nfsd4_file_hash_insert()
4771 			if (refcount_inc_not_zero(&fi->fi_ref))  in nfsd4_file_hash_insert()
4774 			fi->fi_aliased = alias_found = true;  in nfsd4_file_hash_insert()
4780 	err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist,  in nfsd4_file_hash_insert()
4785 	new->fi_aliased = alias_found;  in nfsd4_file_hash_insert()
4789 	spin_unlock(&inode->i_lock);  in nfsd4_file_hash_insert()
4796 	rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist,  in nfsd4_file_hash_remove()
4815 	spin_lock(&fp->fi_lock);  in nfs4_share_conflict()
4816 	if (fp->fi_share_deny & deny_type)  in nfs4_share_conflict()
4818 	spin_unlock(&fp->fi_lock);  in nfs4_share_conflict()
4827 	return ctx && !list_empty_careful(&ctx->flc_lease);  in nfsd4_deleg_present()
4831  * nfsd_wait_for_delegreturn - wait for delegations to be returned
4833  * @inode: in-core inode of the file being waited for
4855 	struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,  in nfsd4_cb_recall_prepare()
4858 	block_delegations(&dp->dl_stid.sc_file->fi_fhandle);  in nfsd4_cb_recall_prepare()
4862 	 * already holding inode->i_lock.  in nfsd4_cb_recall_prepare()
4868 	if (delegation_hashed(dp) && dp->dl_time == 0) {  in nfsd4_cb_recall_prepare()
4869 		dp->dl_time = ktime_get_boottime_seconds();  in nfsd4_cb_recall_prepare()
4870 		list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);  in nfsd4_cb_recall_prepare()
4880 	trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task);  in nfsd4_cb_recall_done()
4882 	if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID ||  in nfsd4_cb_recall_done()
4883 	    dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID)  in nfsd4_cb_recall_done()
4886 	switch (task->tk_status) {  in nfsd4_cb_recall_done()
4889 	case -NFS4ERR_DELAY:  in nfsd4_cb_recall_done()
4892 	case -EBADHANDLE:  in nfsd4_cb_recall_done()
4893 	case -NFS4ERR_BAD_STATEID:  in nfsd4_cb_recall_done()
4898 		if (dp->dl_retries--) {  in nfsd4_cb_recall_done()
4912 	nfs4_put_stid(&dp->dl_stid);  in nfsd4_cb_recall_release()
4930 	refcount_inc(&dp->dl_stid.sc_count);  in nfsd_break_one_deleg()
4931 	WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall));  in nfsd_break_one_deleg()
4938 	struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;  in nfsd_break_deleg_cb()
4939 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in nfsd_break_deleg_cb()
4940 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in nfsd_break_deleg_cb()
4943 	trace_nfsd_cb_recall(&dp->dl_stid);  in nfsd_break_deleg_cb()
4945 	dp->dl_recalled = true;  in nfsd_break_deleg_cb()
4946 	atomic_inc(&clp->cl_delegs_in_recall);  in nfsd_break_deleg_cb()
4948 		nn = net_generic(clp->net, nfsd_net_id);  in nfsd_break_deleg_cb()
4949 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in nfsd_break_deleg_cb()
4957 	fl->fl_break_time = 0;  in nfsd_break_deleg_cb()
4959 	fp->fi_had_conflict = true;  in nfsd_break_deleg_cb()
4965  * nfsd_breaker_owns_lease - Check if lease conflict was resolved
4974 	struct nfs4_delegation *dl = fl->fl_owner;  in nfsd_breaker_owns_lease()
4982 	if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4)  in nfsd_breaker_owns_lease()
4984 	clp = *(rqst->rq_lease_breaker);  in nfsd_breaker_owns_lease()
4985 	return dl->dl_stid.sc_client == clp;  in nfsd_breaker_owns_lease()
4992 	struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner;  in nfsd_change_deleg_cb()
4993 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in nfsd_change_deleg_cb()
4996 		if (dp->dl_recalled)  in nfsd_change_deleg_cb()
4997 			atomic_dec(&clp->cl_delegs_in_recall);  in nfsd_change_deleg_cb()
5000 		return -EAGAIN;  in nfsd_change_deleg_cb()
5013 	if (seqid == so->so_seqid - 1)  in nfsd4_check_seqid()
5015 	if (seqid == so->so_seqid)  in nfsd4_check_seqid()
5025 	spin_lock(&nn->client_lock);  in lookup_clientid()
5028 		atomic_inc(&found->cl_rpc_users);  in lookup_clientid()
5029 	spin_unlock(&nn->client_lock);  in lookup_clientid()
5037 	if (cstate->clp) {  in set_client()
5038 		if (!same_clid(&cstate->clp->cl_clientid, clid))  in set_client()
5046 	 * set cstate->clp), so session = false:  in set_client()
5048 	cstate->clp = lookup_clientid(clid, false, nn);  in set_client()
5049 	if (!cstate->clp)  in set_client()
5058 	clientid_t *clientid = &open->op_clientid;  in nfsd4_process_open1()
5068 	open->op_file = nfsd4_alloc_file();  in nfsd4_process_open1()
5069 	if (open->op_file == NULL)  in nfsd4_process_open1()
5075 	clp = cstate->clp;  in nfsd4_process_open1()
5077 	strhashval = ownerstr_hashval(&open->op_owner);  in nfsd4_process_open1()
5079 	open->op_openowner = oo;  in nfsd4_process_open1()
5083 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {  in nfsd4_process_open1()
5086 		open->op_openowner = NULL;  in nfsd4_process_open1()
5089 	status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);  in nfsd4_process_open1()
5097 	open->op_openowner = oo;  in nfsd4_process_open1()
5099 	open->op_stp = nfs4_alloc_open_stateid(clp);  in nfsd4_process_open1()
5100 	if (!open->op_stp)  in nfsd4_process_open1()
5104 	    (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {  in nfsd4_process_open1()
5105 		open->op_odstate = alloc_clnt_odstate(clp);  in nfsd4_process_open1()
5106 		if (!open->op_odstate)  in nfsd4_process_open1()
5116 	if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))  in nfs4_check_delegmode()
5140 	return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||  in nfsd4_is_deleg_cur()
5141 	       open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;  in nfsd4_is_deleg_cur()
5152 	deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);  in nfs4_check_deleg()
5155 	if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) {  in nfs4_check_deleg()
5156 		nfs4_put_stid(&deleg->dl_stid);  in nfs4_check_deleg()
5157 		if (cl->cl_minorversion)  in nfs4_check_deleg()
5161 	flags = share_access_to_flags(open->op_share_access);  in nfs4_check_deleg()
5164 		nfs4_put_stid(&deleg->dl_stid);  in nfs4_check_deleg()
5173 	open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;  in nfs4_check_deleg()
5199 	if (!open->op_truncate)  in nfsd4_truncate()
5201 	if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))  in nfsd4_truncate()
5212 	int oflag = nfs4_access_to_omode(open->op_share_access);  in nfs4_get_vfs_file()
5213 	int access = nfs4_access_to_access(open->op_share_access);  in nfs4_get_vfs_file()
5216 	spin_lock(&fp->fi_lock);  in nfs4_get_vfs_file()
5222 	status = nfs4_file_check_deny(fp, open->op_share_deny);  in nfs4_get_vfs_file()
5225 			spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5229 				stp, open->op_share_deny, false))  in nfs4_get_vfs_file()
5231 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5236 	status = nfs4_file_get_access(fp, open->op_share_access);  in nfs4_get_vfs_file()
5239 			spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5243 				stp, open->op_share_access, true))  in nfs4_get_vfs_file()
5245 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5250 	old_access_bmap = stp->st_access_bmap;  in nfs4_get_vfs_file()
5251 	set_access(open->op_share_access, stp);  in nfs4_get_vfs_file()
5254 	old_deny_bmap = stp->st_deny_bmap;  in nfs4_get_vfs_file()
5255 	set_deny(open->op_share_deny, stp);  in nfs4_get_vfs_file()
5256 	fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);  in nfs4_get_vfs_file()
5258 	if (!fp->fi_fds[oflag]) {  in nfs4_get_vfs_file()
5259 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5262 						  open->op_filp, &nf);  in nfs4_get_vfs_file()
5266 		spin_lock(&fp->fi_lock);  in nfs4_get_vfs_file()
5267 		if (!fp->fi_fds[oflag]) {  in nfs4_get_vfs_file()
5268 			fp->fi_fds[oflag] = nf;  in nfs4_get_vfs_file()
5272 	spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5276 	status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode,  in nfs4_get_vfs_file()
5287 	stp->st_access_bmap = old_access_bmap;  in nfs4_get_vfs_file()
5288 	nfs4_file_put_access(fp, open->op_share_access);  in nfs4_get_vfs_file()
5299 	unsigned char old_deny_bmap = stp->st_deny_bmap;  in nfs4_upgrade_open()
5301 	if (!test_access(open->op_share_access, stp))  in nfs4_upgrade_open()
5305 	spin_lock(&fp->fi_lock);  in nfs4_upgrade_open()
5306 	status = nfs4_file_check_deny(fp, open->op_share_deny);  in nfs4_upgrade_open()
5309 		set_deny(open->op_share_deny, stp);  in nfs4_upgrade_open()
5310 		fp->fi_share_deny |=  in nfs4_upgrade_open()
5311 			(open->op_share_deny & NFS4_SHARE_DENY_BOTH);  in nfs4_upgrade_open()
5315 				stp, open->op_share_deny, false))  in nfs4_upgrade_open()
5319 	spin_unlock(&fp->fi_lock);  in nfs4_upgrade_open()
5333 	if (clp->cl_cb_state == NFSD4_CB_UP)  in nfsd4_cb_channel_good()
5340 	return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;  in nfsd4_cb_channel_good()
5351 	fl->fl_lmops = &nfsd_lease_mng_ops;  in nfs4_alloc_init_lease()
5352 	fl->fl_flags = FL_DELEG;  in nfs4_alloc_init_lease()
5353 	fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;  in nfs4_alloc_init_lease()
5354 	fl->fl_end = OFFSET_MAX;  in nfs4_alloc_init_lease()
5355 	fl->fl_owner = (fl_owner_t)dp;  in nfs4_alloc_init_lease()
5356 	fl->fl_pid = current->tgid;  in nfs4_alloc_init_lease()
5357 	fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file;  in nfs4_alloc_init_lease()
5365 	struct file *f = fp->fi_deleg_file->nf_file;  in nfsd4_check_conflicting_opens()
5369 	writes = atomic_read(&ino->i_writecount);  in nfsd4_check_conflicting_opens()
5379 	if (fp->fi_aliased)  in nfsd4_check_conflicting_opens()
5380 		return -EAGAIN;  in nfsd4_check_conflicting_opens()
5388 	if (fp->fi_fds[O_WRONLY])  in nfsd4_check_conflicting_opens()
5389 		writes--;  in nfsd4_check_conflicting_opens()
5390 	if (fp->fi_fds[O_RDWR])  in nfsd4_check_conflicting_opens()
5391 		writes--;  in nfsd4_check_conflicting_opens()
5393 		return -EAGAIN; /* There may be non-NFSv4 writers */  in nfsd4_check_conflicting_opens()
5395 	 * It's possible there are non-NFSv4 write opens in progress,  in nfsd4_check_conflicting_opens()
5401 	spin_lock(&fp->fi_lock);  in nfsd4_check_conflicting_opens()
5402 	list_for_each_entry(st, &fp->fi_stateids, st_perfile) {  in nfsd4_check_conflicting_opens()
5403 		if (st->st_openstp == NULL /* it's an open */ &&  in nfsd4_check_conflicting_opens()
5405 		    st->st_stid.sc_client != clp) {  in nfsd4_check_conflicting_opens()
5406 			spin_unlock(&fp->fi_lock);  in nfsd4_check_conflicting_opens()
5407 			return -EAGAIN;  in nfsd4_check_conflicting_opens()
5410 	spin_unlock(&fp->fi_lock);  in nfsd4_check_conflicting_opens()
5433 	err = nfsd_lookup_dentry(open->op_rqstp, parent,  in nfsd4_verify_deleg_dentry()
5434 				 open->op_fname, open->op_fnamelen,  in nfsd4_verify_deleg_dentry()
5438 		return -EAGAIN;  in nfsd4_verify_deleg_dentry()
5442 	if (child != file_dentry(fp->fi_deleg_file->nf_file))  in nfsd4_verify_deleg_dentry()
5443 		return -EAGAIN;  in nfsd4_verify_deleg_dentry()
5457 	struct inode *inode = file_inode(nf->nf_file);  in nfsd4_verify_setuid_write()
5459 	if ((open->op_share_access & NFS4_SHARE_ACCESS_WRITE) &&  in nfsd4_verify_setuid_write()
5460 	    (inode->i_mode & (S_ISUID|S_ISGID)))  in nfsd4_verify_setuid_write()
5461 		return -EAGAIN;  in nfsd4_verify_setuid_write()
5470 	struct nfs4_client *clp = stp->st_stid.sc_client;  in nfs4_set_delegation()
5471 	struct nfs4_file *fp = stp->st_stid.sc_file;  in nfs4_set_delegation()
5472 	struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate;  in nfs4_set_delegation()
5483 	if (fp->fi_had_conflict)  in nfs4_set_delegation()
5484 		return ERR_PTR(-EAGAIN);  in nfs4_set_delegation()
5498 	if ((open->op_share_access & NFS4_SHARE_ACCESS_BOTH) == NFS4_SHARE_ACCESS_BOTH) {  in nfs4_set_delegation()
5507 	if (!nf && (open->op_share_access & NFS4_SHARE_ACCESS_READ)) {  in nfs4_set_delegation()
5513 		return ERR_PTR(-EAGAIN);  in nfs4_set_delegation()
5516 	spin_lock(&fp->fi_lock);  in nfs4_set_delegation()
5518 		status = -EAGAIN;  in nfs4_set_delegation()
5520 		status = -EAGAIN;  in nfs4_set_delegation()
5521 	else if (!fp->fi_deleg_file) {  in nfs4_set_delegation()
5522 		fp->fi_deleg_file = nf;  in nfs4_set_delegation()
5525 		fp->fi_delegees = 1;  in nfs4_set_delegation()
5528 		fp->fi_delegees++;  in nfs4_set_delegation()
5529 	spin_unlock(&fp->fi_lock);  in nfs4_set_delegation()
5536 	status = -ENOMEM;  in nfs4_set_delegation()
5545 	status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL);  in nfs4_set_delegation()
5565 	status = nfsd4_verify_setuid_write(open, fp->fi_deleg_file);  in nfs4_set_delegation()
5569 	status = -EAGAIN;  in nfs4_set_delegation()
5570 	if (fp->fi_had_conflict)  in nfs4_set_delegation()
5574 	spin_lock(&fp->fi_lock);  in nfs4_set_delegation()
5576 	spin_unlock(&fp->fi_lock);  in nfs4_set_delegation()
5584 	vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp);  in nfs4_set_delegation()
5586 	put_clnt_odstate(dp->dl_clnt_odstate);  in nfs4_set_delegation()
5587 	nfs4_put_stid(&dp->dl_stid);  in nfs4_set_delegation()
5595 	open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_open_deleg_none_ext()
5596 	if (status == -EAGAIN)  in nfsd4_open_deleg_none_ext()
5597 		open->op_why_no_deleg = WND4_CONTENTION;  in nfsd4_open_deleg_none_ext()
5599 		open->op_why_no_deleg = WND4_RESOURCE;  in nfsd4_open_deleg_none_ext()
5600 		switch (open->op_deleg_want) {  in nfsd4_open_deleg_none_ext()
5606 			open->op_why_no_deleg = WND4_CANCELLED;  in nfsd4_open_deleg_none_ext()
5643 	struct nfs4_openowner *oo = openowner(stp->st_stateowner);  in nfs4_open_delegation()
5644 	struct nfs4_client *clp = stp->st_stid.sc_client;  in nfs4_open_delegation()
5649 	cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);  in nfs4_open_delegation()
5650 	open->op_recall = 0;  in nfs4_open_delegation()
5651 	switch (open->op_claim_type) {  in nfs4_open_delegation()
5654 				open->op_recall = 1;  in nfs4_open_delegation()
5665 			if (locks_in_grace(clp->net))  in nfs4_open_delegation()
5667 			if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))  in nfs4_open_delegation()
5669 			if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE &&  in nfs4_open_delegation()
5670 					!clp->cl_minorversion)  in nfs4_open_delegation()
5680 	memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));  in nfs4_open_delegation()
5682 	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) {  in nfs4_open_delegation()
5683 		open->op_delegate_type = NFS4_OPEN_DELEGATE_WRITE;  in nfs4_open_delegation()
5684 		trace_nfsd_deleg_write(&dp->dl_stid.sc_stateid);  in nfs4_open_delegation()
5686 		open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;  in nfs4_open_delegation()
5687 		trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);  in nfs4_open_delegation()
5689 	nfs4_put_stid(&dp->dl_stid);  in nfs4_open_delegation()
5692 	open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;  in nfs4_open_delegation()
5693 	if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&  in nfs4_open_delegation()
5694 	    open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {  in nfs4_open_delegation()
5696 		open->op_recall = 1;  in nfs4_open_delegation()
5700 	if (open->op_deleg_want)  in nfs4_open_delegation()
5708 	if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&  in nfsd4_deleg_xgrade_none_ext()
5709 	    dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {  in nfsd4_deleg_xgrade_none_ext()
5710 		open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_deleg_xgrade_none_ext()
5711 		open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;  in nfsd4_deleg_xgrade_none_ext()
5712 	} else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&  in nfsd4_deleg_xgrade_none_ext()
5713 		   dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {  in nfsd4_deleg_xgrade_none_ext()
5714 		open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_deleg_xgrade_none_ext()
5715 		open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;  in nfsd4_deleg_xgrade_none_ext()
5724  * nfsd4_process_open2 - finish open processing
5729  * If successful, (1) truncate the file if open->op_truncate was
5730  * set, (2) set open->op_stateid, (3) set open->op_delegation.
5738 	struct nfsd4_compoundres *resp = rqstp->rq_resp;  in nfsd4_process_open2()
5739 	struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;  in nfsd4_process_open2()
5751 	fp = nfsd4_file_hash_insert(open->op_file, current_fh);  in nfsd4_process_open2()
5754 	if (fp != open->op_file) {  in nfsd4_process_open2()
5760 		open->op_file = NULL;  in nfsd4_process_open2()
5773 		if (!open->op_stp)  in nfsd4_process_open2()
5787 			mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5793 			stp->st_stid.sc_type = NFS4_CLOSED_STID;  in nfsd4_process_open2()
5795 			mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5799 		stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,  in nfsd4_process_open2()
5800 							open->op_odstate);  in nfsd4_process_open2()
5801 		if (stp->st_clnt_odstate == open->op_odstate)  in nfsd4_process_open2()
5802 			open->op_odstate = NULL;  in nfsd4_process_open2()
5805 	nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);  in nfsd4_process_open2()
5806 	mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5808 	if (nfsd4_has_session(&resp->cstate)) {  in nfsd4_process_open2()
5809 		if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {  in nfsd4_process_open2()
5810 			open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_process_open2()
5811 			open->op_why_no_deleg = WND4_NOT_WANTED;  in nfsd4_process_open2()
5820 	nfs4_open_delegation(open, stp, &resp->cstate.current_fh);  in nfsd4_process_open2()
5823 	trace_nfsd_open(&stp->st_stid.sc_stateid);  in nfsd4_process_open2()
5826 	if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&  in nfsd4_process_open2()
5827 	    open->op_deleg_want)  in nfsd4_process_open2()
5832 	if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)  in nfsd4_process_open2()
5833 		open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;  in nfsd4_process_open2()
5837 	open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;  in nfsd4_process_open2()
5838 	if (nfsd4_has_session(&resp->cstate))  in nfsd4_process_open2()
5839 		open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;  in nfsd4_process_open2()
5840 	else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))  in nfsd4_process_open2()
5841 		open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;  in nfsd4_process_open2()
5844 		nfs4_put_stid(&dp->dl_stid);  in nfsd4_process_open2()
5846 		nfs4_put_stid(&stp->st_stid);  in nfsd4_process_open2()
5854 	if (open->op_openowner) {  in nfsd4_cleanup_open_state()
5855 		struct nfs4_stateowner *so = &open->op_openowner->oo_owner;  in nfsd4_cleanup_open_state()
5860 	if (open->op_file)  in nfsd4_cleanup_open_state()
5861 		kmem_cache_free(file_slab, open->op_file);  in nfsd4_cleanup_open_state()
5862 	if (open->op_stp)  in nfsd4_cleanup_open_state()
5863 		nfs4_put_stid(&open->op_stp->st_stid);  in nfsd4_cleanup_open_state()
5864 	if (open->op_odstate)  in nfsd4_cleanup_open_state()
5865 		kmem_cache_free(odstate_slab, open->op_odstate);  in nfsd4_cleanup_open_state()
5872 	clientid_t *clid = &u->renew;  in nfsd4_renew()
5881 	clp = cstate->clp;  in nfsd4_renew()
5882 	if (!list_empty(&clp->cl_delegations)  in nfsd4_renew()
5883 			&& clp->cl_cb_state != NFSD4_CB_UP)  in nfsd4_renew()
5892 	if (nn->grace_ended)  in nfsd4_end_grace()
5896 	nn->grace_ended = true;  in nfsd4_end_grace()
5913 	locks_end_grace(&nn->nfsd4_manager);  in nfsd4_end_grace()
5927 	time64_t double_grace_period_end = nn->boot_time +  in clients_still_reclaiming()
5928 					   2 * nn->nfsd4_lease;  in clients_still_reclaiming()
5930 	if (nn->track_reclaim_completes &&  in clients_still_reclaiming()
5931 			atomic_read(&nn->nr_reclaim_complete) ==  in clients_still_reclaiming()
5932 			nn->reclaim_str_hashtbl_size)  in clients_still_reclaiming()
5934 	if (!nn->somebody_reclaimed)  in clients_still_reclaiming()
5936 	nn->somebody_reclaimed = false;  in clients_still_reclaiming()
5955 	if (last_refresh < lt->cutoff)  in state_expired()
5957 	time_remaining = last_refresh - lt->cutoff;  in state_expired()
5958 	lt->new_timeo = min(lt->new_timeo, time_remaining);  in state_expired()
5965 	spin_lock_init(&nn->nfsd_ssc_lock);  in nfsd4_ssc_init_umount_work()
5966 	INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list);  in nfsd4_ssc_init_umount_work()
5967 	init_waitqueue_head(&nn->nfsd_ssc_waitq);  in nfsd4_ssc_init_umount_work()
5980 	spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5981 	list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {  in nfsd4_ssc_shutdown_umount()
5982 		list_del(&ni->nsui_list);  in nfsd4_ssc_shutdown_umount()
5983 		spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5984 		mntput(ni->nsui_vfsmount);  in nfsd4_ssc_shutdown_umount()
5986 		spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5988 	spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5997 	spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
5998 	list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {  in nfsd4_ssc_expire_umount()
5999 		if (time_after(jiffies, ni->nsui_expire)) {  in nfsd4_ssc_expire_umount()
6000 			if (refcount_read(&ni->nsui_refcnt) > 1)  in nfsd4_ssc_expire_umount()
6004 			ni->nsui_busy = true;  in nfsd4_ssc_expire_umount()
6005 			spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6006 			mntput(ni->nsui_vfsmount);  in nfsd4_ssc_expire_umount()
6007 			spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6010 			list_del(&ni->nsui_list);  in nfsd4_ssc_expire_umount()
6020 		wake_up_all(&nn->nfsd_ssc_waitq);  in nfsd4_ssc_expire_umount()
6021 	spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6033 	list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {  in nfs4_lockowner_has_blockers()
6034 		nf = stp->st_stid.sc_file;  in nfs4_lockowner_has_blockers()
6035 		ctx = locks_inode_context(nf->fi_inode);  in nfs4_lockowner_has_blockers()
6051 	if (atomic_read(&clp->cl_delegs_in_recall))  in nfs4_anylock_blockers()
6053 	spin_lock(&clp->cl_lock);  in nfs4_anylock_blockers()
6055 		list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i],  in nfs4_anylock_blockers()
6057 			if (so->so_is_open_owner)  in nfs4_anylock_blockers()
6061 				spin_unlock(&clp->cl_lock);  in nfs4_anylock_blockers()
6066 	spin_unlock(&clp->cl_lock);  in nfs4_anylock_blockers()
6078 	maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ?  in nfs4_get_client_reaplist()
6081 	spin_lock(&nn->client_lock);  in nfs4_get_client_reaplist()
6082 	list_for_each_safe(pos, next, &nn->client_lru) {  in nfs4_get_client_reaplist()
6084 		if (clp->cl_state == NFSD4_EXPIRABLE)  in nfs4_get_client_reaplist()
6086 		if (!state_expired(lt, clp->cl_time))  in nfs4_get_client_reaplist()
6088 		if (!atomic_read(&clp->cl_rpc_users)) {  in nfs4_get_client_reaplist()
6089 			if (clp->cl_state == NFSD4_ACTIVE)  in nfs4_get_client_reaplist()
6090 				atomic_inc(&nn->nfsd_courtesy_clients);  in nfs4_get_client_reaplist()
6091 			clp->cl_state = NFSD4_COURTESY;  in nfs4_get_client_reaplist()
6100 			list_add(&clp->cl_lru, reaplist);  in nfs4_get_client_reaplist()
6104 	spin_unlock(&nn->client_lock);  in nfs4_get_client_reaplist()
6118 	spin_lock(&nn->client_lock);  in nfs4_get_courtesy_client_reaplist()
6119 	list_for_each_safe(pos, next, &nn->client_lru) {  in nfs4_get_courtesy_client_reaplist()
6121 		if (clp->cl_state == NFSD4_ACTIVE)  in nfs4_get_courtesy_client_reaplist()
6126 			list_add(&clp->cl_lru, reaplist);  in nfs4_get_courtesy_client_reaplist()
6130 	spin_unlock(&nn->client_lock);  in nfs4_get_courtesy_client_reaplist()
6141 		trace_nfsd_clid_purged(&clp->cl_clientid);  in nfs4_process_client_reaplist()
6142 		list_del_init(&clp->cl_lru);  in nfs4_process_client_reaplist()
6156 		.cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease,  in nfs4_laundromat()
6157 		.new_timeo = nn->nfsd4_lease  in nfs4_laundromat()
6169 	spin_lock(&nn->s2s_cp_lock);  in nfs4_laundromat()
6170 	idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {  in nfs4_laundromat()
6172 		if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID &&  in nfs4_laundromat()
6173 				state_expired(&lt, cps->cpntf_time))  in nfs4_laundromat()
6176 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_laundromat()
6181 	list_for_each_safe(pos, next, &nn->del_recall_lru) {  in nfs4_laundromat()
6183 		if (!state_expired(&lt, dp->dl_time))  in nfs4_laundromat()
6186 		list_add(&dp->dl_recall_lru, &reaplist);  in nfs4_laundromat()
6192 		list_del_init(&dp->dl_recall_lru);  in nfs4_laundromat()
6196 	spin_lock(&nn->client_lock);  in nfs4_laundromat()
6197 	while (!list_empty(&nn->close_lru)) {  in nfs4_laundromat()
6198 		oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,  in nfs4_laundromat()
6200 		if (!state_expired(&lt, oo->oo_time))  in nfs4_laundromat()
6202 		list_del_init(&oo->oo_close_lru);  in nfs4_laundromat()
6203 		stp = oo->oo_last_closed_stid;  in nfs4_laundromat()
6204 		oo->oo_last_closed_stid = NULL;  in nfs4_laundromat()
6205 		spin_unlock(&nn->client_lock);  in nfs4_laundromat()
6206 		nfs4_put_stid(&stp->st_stid);  in nfs4_laundromat()
6207 		spin_lock(&nn->client_lock);  in nfs4_laundromat()
6209 	spin_unlock(&nn->client_lock);  in nfs4_laundromat()
6214 	 * So, we clean out any un-revisited request after a lease period  in nfs4_laundromat()
6223 	spin_lock(&nn->blocked_locks_lock);  in nfs4_laundromat()
6224 	while (!list_empty(&nn->blocked_locks_lru)) {  in nfs4_laundromat()
6225 		nbl = list_first_entry(&nn->blocked_locks_lru,  in nfs4_laundromat()
6227 		if (!state_expired(&lt, nbl->nbl_time))  in nfs4_laundromat()
6229 		list_move(&nbl->nbl_lru, &reaplist);  in nfs4_laundromat()
6230 		list_del_init(&nbl->nbl_list);  in nfs4_laundromat()
6232 	spin_unlock(&nn->blocked_locks_lock);  in nfs4_laundromat()
6237 		list_del_init(&nbl->nbl_lru);  in nfs4_laundromat()
6241 	/* service the server-to-server copy delayed unmount list */  in nfs4_laundromat()
6259 	queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);  in laundromat_main()
6279 	spin_lock(&nn->client_lock);  in deleg_reaper()
6280 	list_for_each_safe(pos, next, &nn->client_lru) {  in deleg_reaper()
6282 		if (clp->cl_state != NFSD4_ACTIVE ||  in deleg_reaper()
6283 			list_empty(&clp->cl_delegations) ||  in deleg_reaper()
6284 			atomic_read(&clp->cl_delegs_in_recall) ||  in deleg_reaper()
6285 			test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags) ||  in deleg_reaper()
6286 			(ktime_get_boottime_seconds() -  in deleg_reaper()
6287 				clp->cl_ra_time < 5)) {  in deleg_reaper()
6290 		list_add(&clp->cl_ra_cblist, &cblist);  in deleg_reaper()
6293 		kref_get(&clp->cl_nfsdfs.cl_ref);  in deleg_reaper()
6294 		set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);  in deleg_reaper()
6295 		clp->cl_ra_time = ktime_get_boottime_seconds();  in deleg_reaper()
6297 	spin_unlock(&nn->client_lock);  in deleg_reaper()
6302 		list_del_init(&clp->cl_ra_cblist);  in deleg_reaper()
6303 		clp->cl_ra->ra_keep = 0;  in deleg_reaper()
6304 		clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG);  in deleg_reaper()
6305 		trace_nfsd_cb_recall_any(clp->cl_ra);  in deleg_reaper()
6306 		nfsd4_run_cb(&clp->cl_ra->ra_cb);  in deleg_reaper()
6322 	if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))  in nfs4_check_fh()
6333 	if (stp->st_openstp)  in nfs4_check_openmode()
6334 		stp = stp->st_openstp;  in nfs4_check_openmode()
6367 	if (has_session && in->si_generation == 0)  in check_stateid_generation()
6370 	if (in->si_generation == ref->si_generation)  in check_stateid_generation()
6378 	 * non-buggy client.  For example, if the client sends a lock  in check_stateid_generation()
6393 	spin_lock(&s->sc_lock);  in nfsd4_stid_check_stateid_generation()
6396 		ret = check_stateid_generation(in, &s->sc_stateid, has_session);  in nfsd4_stid_check_stateid_generation()
6397 	spin_unlock(&s->sc_lock);  in nfsd4_stid_check_stateid_generation()
6403 	if (ols->st_stateowner->so_is_open_owner &&  in nfsd4_check_openowner_confirmed()
6404 	    !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))  in nfsd4_check_openowner_confirmed()
6417 	spin_lock(&cl->cl_lock);  in nfsd4_validate_stateid()
6424 	switch (s->sc_type) {  in nfsd4_validate_stateid()
6436 		printk("unknown stateid type %x\n", s->sc_type);  in nfsd4_validate_stateid()
6443 	spin_unlock(&cl->cl_lock);  in nfsd4_validate_stateid()
6468 	status = set_client(&stateid->si_opaque.so_clid, cstate, nn);  in nfsd4_lookup_stateid()
6470 		if (cstate->session)  in nfsd4_lookup_stateid()
6476 	stid = find_stateid_by_type(cstate->clp, stateid, typemask);  in nfsd4_lookup_stateid()
6479 	if ((stid->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {  in nfsd4_lookup_stateid()
6481 		if (cstate->minorversion)  in nfsd4_lookup_stateid()
6497 	switch (s->sc_type) {  in nfs4_find_file()
6499 		spin_lock(&s->sc_file->fi_lock);  in nfs4_find_file()
6500 		ret = nfsd_file_get(s->sc_file->fi_deleg_file);  in nfs4_find_file()
6501 		spin_unlock(&s->sc_file->fi_lock);  in nfs4_find_file()
6506 			ret = find_readable_file(s->sc_file);  in nfs4_find_file()
6508 			ret = find_writeable_file(s->sc_file);  in nfs4_find_file()
6535 		status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,  in nfs4_check_file()
6553 	WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID);  in _free_cpntf_state_locked()
6554 	if (!refcount_dec_and_test(&cps->cp_stateid.cs_count))  in _free_cpntf_state_locked()
6556 	list_del(&cps->cp_list);  in _free_cpntf_state_locked()
6557 	idr_remove(&nn->s2s_cp_stateids,  in _free_cpntf_state_locked()
6558 		   cps->cp_stateid.cs_stid.si_opaque.so_id);  in _free_cpntf_state_locked()
6573 	if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id)  in manage_cpntf_state()
6575 	spin_lock(&nn->s2s_cp_lock);  in manage_cpntf_state()
6576 	cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id);  in manage_cpntf_state()
6580 		if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) {  in manage_cpntf_state()
6585 			refcount_inc(&state->cp_stateid.cs_count);  in manage_cpntf_state()
6590 	spin_unlock(&nn->s2s_cp_lock);  in manage_cpntf_state()
6609 	cps->cpntf_time = ktime_get_boottime_seconds();  in find_cpntf_state()
6612 	found = lookup_clientid(&cps->cp_p_clid, true, nn);  in find_cpntf_state()
6616 	*stid = find_stateid_by_type(found, &cps->cp_p_stateid,  in find_cpntf_state()
6631 	spin_lock(&nn->s2s_cp_lock);  in nfs4_put_cpntf_state()
6633 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_put_cpntf_state()
6637  * nfs4_preprocess_stateid_op - find and prep stateid for an operation
6685 	switch (s->sc_type) {  in nfs4_preprocess_stateid_op()
6721 	struct nfsd4_test_stateid *test_stateid = &u->test_stateid;  in nfsd4_test_stateid()
6723 	struct nfs4_client *cl = cstate->clp;  in nfsd4_test_stateid()
6725 	list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)  in nfsd4_test_stateid()
6726 		stateid->ts_id_status =  in nfsd4_test_stateid()
6727 			nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);  in nfsd4_test_stateid()
6742 	ret = check_stateid_generation(stateid, &s->sc_stateid, 1);  in nfsd4_free_lock_stateid()
6747 	if (check_for_locks(stp->st_stid.sc_file,  in nfsd4_free_lock_stateid()
6748 			    lockowner(stp->st_stateowner)))  in nfsd4_free_lock_stateid()
6755 	mutex_unlock(&stp->st_mutex);  in nfsd4_free_lock_stateid()
6765 	struct nfsd4_free_stateid *free_stateid = &u->free_stateid;  in nfsd4_free_stateid()
6766 	stateid_t *stateid = &free_stateid->fr_stateid;  in nfsd4_free_stateid()
6769 	struct nfs4_client *cl = cstate->clp;  in nfsd4_free_stateid()
6772 	spin_lock(&cl->cl_lock);  in nfsd4_free_stateid()
6776 	spin_lock(&s->sc_lock);  in nfsd4_free_stateid()
6777 	switch (s->sc_type) {  in nfsd4_free_stateid()
6782 		ret = check_stateid_generation(stateid, &s->sc_stateid, 1);  in nfsd4_free_stateid()
6788 		spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6789 		refcount_inc(&s->sc_count);  in nfsd4_free_stateid()
6790 		spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6794 		spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6796 		list_del_init(&dp->dl_recall_lru);  in nfsd4_free_stateid()
6797 		spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6803 	spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6805 	spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6819 	struct svc_fh *current_fh = &cstate->current_fh;  in nfs4_seqid_op_checks()
6820 	struct nfs4_stateowner *sop = stp->st_stateowner;  in nfs4_seqid_op_checks()
6829 	status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));  in nfs4_seqid_op_checks()
6831 		status = nfs4_check_fh(current_fh, &stp->st_stid);  in nfs4_seqid_op_checks()
6833 		mutex_unlock(&stp->st_mutex);  in nfs4_seqid_op_checks()
6838  * nfs4_preprocess_seqid_op - find and prep an ol_stateid for a seqid-morphing op
6867 	nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);  in nfs4_preprocess_seqid_op()
6873 		nfs4_put_stid(&stp->st_stid);  in nfs4_preprocess_seqid_op()
6888 	oo = openowner(stp->st_stateowner);  in nfs4_preprocess_confirmed_seqid_op()
6889 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {  in nfs4_preprocess_confirmed_seqid_op()
6890 		mutex_unlock(&stp->st_mutex);  in nfs4_preprocess_confirmed_seqid_op()
6891 		nfs4_put_stid(&stp->st_stid);  in nfs4_preprocess_confirmed_seqid_op()
6902 	struct nfsd4_open_confirm *oc = &u->open_confirm;  in nfsd4_open_confirm()
6909 			cstate->current_fh.fh_dentry);  in nfsd4_open_confirm()
6911 	status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);  in nfsd4_open_confirm()
6916 					oc->oc_seqid, &oc->oc_req_stateid,  in nfsd4_open_confirm()
6920 	oo = openowner(stp->st_stateowner);  in nfsd4_open_confirm()
6922 	if (oo->oo_flags & NFS4_OO_CONFIRMED) {  in nfsd4_open_confirm()
6923 		mutex_unlock(&stp->st_mutex);  in nfsd4_open_confirm()
6926 	oo->oo_flags |= NFS4_OO_CONFIRMED;  in nfsd4_open_confirm()
6927 	nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);  in nfsd4_open_confirm()
6928 	mutex_unlock(&stp->st_mutex);  in nfsd4_open_confirm()
6929 	trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid);  in nfsd4_open_confirm()
6930 	nfsd4_client_record_create(oo->oo_owner.so_client);  in nfsd4_open_confirm()
6933 	nfs4_put_stid(&stp->st_stid);  in nfsd4_open_confirm()
6943 	nfs4_file_put_access(stp->st_stid.sc_file, access);  in nfs4_stateid_downgrade_bit()
6969 	struct nfsd4_open_downgrade *od = &u->open_downgrade;  in nfsd4_open_downgrade()
6975 			cstate->current_fh.fh_dentry);  in nfsd4_open_downgrade()
6978 	if (od->od_deleg_want)  in nfsd4_open_downgrade()
6980 			od->od_deleg_want);  in nfsd4_open_downgrade()
6982 	status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,  in nfsd4_open_downgrade()
6983 					&od->od_stateid, &stp, nn);  in nfsd4_open_downgrade()
6987 	if (!test_access(od->od_share_access, stp)) {  in nfsd4_open_downgrade()
6989 			stp->st_access_bmap, od->od_share_access);  in nfsd4_open_downgrade()
6992 	if (!test_deny(od->od_share_deny, stp)) {  in nfsd4_open_downgrade()
6994 			stp->st_deny_bmap, od->od_share_deny);  in nfsd4_open_downgrade()
6997 	nfs4_stateid_downgrade(stp, od->od_share_access);  in nfsd4_open_downgrade()
6998 	reset_union_bmap_deny(od->od_share_deny, stp);  in nfsd4_open_downgrade()
6999 	nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);  in nfsd4_open_downgrade()
7002 	mutex_unlock(&stp->st_mutex);  in nfsd4_open_downgrade()
7003 	nfs4_put_stid(&stp->st_stid);  in nfsd4_open_downgrade()
7011 	struct nfs4_client *clp = s->st_stid.sc_client;  in nfsd4_close_open_stateid()
7016 	spin_lock(&clp->cl_lock);  in nfsd4_close_open_stateid()
7019 	if (clp->cl_minorversion) {  in nfsd4_close_open_stateid()
7022 		spin_unlock(&clp->cl_lock);  in nfsd4_close_open_stateid()
7024 			nfs4_free_cpntf_statelist(clp->net, &stp->st_stid);  in nfsd4_close_open_stateid()
7027 		spin_unlock(&clp->cl_lock);  in nfsd4_close_open_stateid()
7030 			move_to_close_lru(s, clp->net);  in nfsd4_close_open_stateid()
7041 	struct nfsd4_close *close = &u->close;  in nfsd4_close()
7048 			cstate->current_fh.fh_dentry);  in nfsd4_close()
7050 	status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,  in nfsd4_close()
7051 					&close->cl_stateid,  in nfsd4_close()
7058 	stp->st_stid.sc_type = NFS4_CLOSED_STID;  in nfsd4_close()
7066 	nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);  in nfsd4_close()
7069 	mutex_unlock(&stp->st_mutex);  in nfsd4_close()
7078 	memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid));  in nfsd4_close()
7081 	nfs4_put_stid(&stp->st_stid);  in nfsd4_close()
7090 	struct nfsd4_delegreturn *dr = &u->delegreturn;  in nfsd4_delegreturn()
7092 	stateid_t *stateid = &dr->dr_stateid;  in nfsd4_delegreturn()
7097 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))  in nfsd4_delegreturn()
7104 	status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate));  in nfsd4_delegreturn()
7109 	wake_up_var(d_inode(cstate->current_fh.fh_dentry));  in nfsd4_delegreturn()
7112 	nfs4_put_stid(&dp->dl_stid);  in nfsd4_delegreturn()
7125 	return end > start ? end - 1: NFS4_MAX_UINT64;  in last_byte_offset()
7129  * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
7130  * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
7131  * byte, because of sign extension problems.  Since NFSv4 calls for 64-bit
7132  * locking, this prevents us from being completely protocol-compliant.  The
7139 	if (lock->fl_start < 0)  in nfs4_transform_lock_offset()
7140 		lock->fl_start = OFFSET_MAX;  in nfs4_transform_lock_offset()
7141 	if (lock->fl_end < 0)  in nfs4_transform_lock_offset()
7142 		lock->fl_end = OFFSET_MAX;  in nfs4_transform_lock_offset()
7150 	nfs4_get_stateowner(&lo->lo_owner);  in nfsd4_lm_get_owner()
7160 		nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_lm_put_owner()
7167 	struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner;  in nfsd4_lm_lock_expirable()
7168 	struct nfs4_client *clp = lo->lo_owner.so_client;  in nfsd4_lm_lock_expirable()
7172 		nn = net_generic(clp->net, nfsd_net_id);  in nfsd4_lm_lock_expirable()
7173 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in nfsd4_lm_lock_expirable()
7189 	struct nfs4_lockowner		*lo = (struct nfs4_lockowner *)fl->fl_owner;  in nfsd4_lm_notify()
7190 	struct net			*net = lo->lo_owner.so_client->net;  in nfsd4_lm_notify()
7197 	spin_lock(&nn->blocked_locks_lock);  in nfsd4_lm_notify()
7198 	if (!list_empty(&nbl->nbl_list)) {  in nfsd4_lm_notify()
7199 		list_del_init(&nbl->nbl_list);  in nfsd4_lm_notify()
7200 		list_del_init(&nbl->nbl_lru);  in nfsd4_lm_notify()
7203 	spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lm_notify()
7207 		nfsd4_run_cb(&nbl->nbl_cb);  in nfsd4_lm_notify()
7225 	if (fl->fl_lmops == &nfsd_posix_mng_ops) {  in nfs4_set_lock_denied()
7226 		lo = (struct nfs4_lockowner *) fl->fl_owner;  in nfs4_set_lock_denied()
7227 		xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,  in nfs4_set_lock_denied()
7229 		if (!deny->ld_owner.data)  in nfs4_set_lock_denied()
7232 		deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;  in nfs4_set_lock_denied()
7235 		deny->ld_owner.len = 0;  in nfs4_set_lock_denied()
7236 		deny->ld_owner.data = NULL;  in nfs4_set_lock_denied()
7237 		deny->ld_clientid.cl_boot = 0;  in nfs4_set_lock_denied()
7238 		deny->ld_clientid.cl_id = 0;  in nfs4_set_lock_denied()
7240 	deny->ld_start = fl->fl_start;  in nfs4_set_lock_denied()
7241 	deny->ld_length = NFS4_MAX_UINT64;  in nfs4_set_lock_denied()
7242 	if (fl->fl_end != NFS4_MAX_UINT64)  in nfs4_set_lock_denied()
7243 		deny->ld_length = fl->fl_end - fl->fl_start + 1;          in nfs4_set_lock_denied()
7244 	deny->ld_type = NFS4_READ_LT;  in nfs4_set_lock_denied()
7245 	if (fl->fl_type != F_RDLCK)  in nfs4_set_lock_denied()
7246 		deny->ld_type = NFS4_WRITE_LT;  in nfs4_set_lock_denied()
7255 	lockdep_assert_held(&clp->cl_lock);  in find_lockowner_str_locked()
7257 	list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],  in find_lockowner_str_locked()
7259 		if (so->so_is_open_owner)  in find_lockowner_str_locked()
7272 	spin_lock(&clp->cl_lock);  in find_lockowner_str()
7274 	spin_unlock(&clp->cl_lock);  in find_lockowner_str()
7297  * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 
7309 	lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);  in alloc_init_lock_stateowner()
7312 	INIT_LIST_HEAD(&lo->lo_blocked);  in alloc_init_lock_stateowner()
7313 	INIT_LIST_HEAD(&lo->lo_owner.so_stateids);  in alloc_init_lock_stateowner()
7314 	lo->lo_owner.so_is_open_owner = 0;  in alloc_init_lock_stateowner()
7315 	lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;  in alloc_init_lock_stateowner()
7316 	lo->lo_owner.so_ops = &lockowner_ops;  in alloc_init_lock_stateowner()
7317 	spin_lock(&clp->cl_lock);  in alloc_init_lock_stateowner()
7318 	ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);  in alloc_init_lock_stateowner()
7320 		list_add(&lo->lo_owner.so_strhash,  in alloc_init_lock_stateowner()
7321 			 &clp->cl_ownerstr_hashtbl[strhashval]);  in alloc_init_lock_stateowner()
7324 		nfs4_free_stateowner(&lo->lo_owner);  in alloc_init_lock_stateowner()
7326 	spin_unlock(&clp->cl_lock);  in alloc_init_lock_stateowner()
7336 	lockdep_assert_held(&ost->st_stid.sc_client->cl_lock);  in find_lock_stateid()
7338 	/* If ost is not hashed, ost->st_locks will not be valid */  in find_lock_stateid()
7340 		list_for_each_entry(lst, &ost->st_locks, st_locks) {  in find_lock_stateid()
7341 			if (lst->st_stateowner == &lo->lo_owner) {  in find_lock_stateid()
7342 				refcount_inc(&lst->st_stid.sc_count);  in find_lock_stateid()
7354 	struct nfs4_client *clp = lo->lo_owner.so_client;  in init_lock_stateid()
7357 	mutex_init(&stp->st_mutex);  in init_lock_stateid()
7358 	mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);  in init_lock_stateid()
7360 	spin_lock(&clp->cl_lock);  in init_lock_stateid()
7366 	refcount_inc(&stp->st_stid.sc_count);  in init_lock_stateid()
7367 	stp->st_stid.sc_type = NFS4_LOCK_STID;  in init_lock_stateid()
7368 	stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);  in init_lock_stateid()
7370 	stp->st_stid.sc_file = fp;  in init_lock_stateid()
7371 	stp->st_access_bmap = 0;  in init_lock_stateid()
7372 	stp->st_deny_bmap = open_stp->st_deny_bmap;  in init_lock_stateid()
7373 	stp->st_openstp = open_stp;  in init_lock_stateid()
7374 	spin_lock(&fp->fi_lock);  in init_lock_stateid()
7375 	list_add(&stp->st_locks, &open_stp->st_locks);  in init_lock_stateid()
7376 	list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);  in init_lock_stateid()
7377 	list_add(&stp->st_perfile, &fp->fi_stateids);  in init_lock_stateid()
7378 	spin_unlock(&fp->fi_lock);  in init_lock_stateid()
7379 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
7382 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
7384 		nfs4_put_stid(&retstp->st_stid);  in init_lock_stateid()
7388 	mutex_unlock(&stp->st_mutex);  in init_lock_stateid()
7391 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
7392 	mutex_unlock(&stp->st_mutex);  in init_lock_stateid()
7403 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);  in find_or_create_lock_stateid()
7404 	struct nfs4_client *clp = oo->oo_owner.so_client;  in find_or_create_lock_stateid()
7407 	spin_lock(&clp->cl_lock);  in find_or_create_lock_stateid()
7409 	spin_unlock(&clp->cl_lock);  in find_or_create_lock_stateid()
7413 		nfs4_put_stid(&lst->st_stid);  in find_or_create_lock_stateid()
7437 	struct nfs4_file *fp = lock_stp->st_stid.sc_file;  in get_lock_access()
7439 	lockdep_assert_held(&fp->fi_lock);  in get_lock_access()
7454 	struct nfs4_file *fi = ost->st_stid.sc_file;  in lookup_or_create_lock_state()
7455 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);  in lookup_or_create_lock_state()
7456 	struct nfs4_client *cl = oo->oo_owner.so_client;  in lookup_or_create_lock_state()
7457 	struct inode *inode = d_inode(cstate->current_fh.fh_dentry);  in lookup_or_create_lock_state()
7462 	lo = find_lockowner_str(cl, &lock->lk_new_owner);  in lookup_or_create_lock_state()
7464 		strhashval = ownerstr_hashval(&lock->lk_new_owner);  in lookup_or_create_lock_state()
7471 		if (!cstate->minorversion &&  in lookup_or_create_lock_state()
7472 		    lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)  in lookup_or_create_lock_state()
7485 	nfs4_put_stateowner(&lo->lo_owner);  in lookup_or_create_lock_state()
7496 	struct nfsd4_lock *lock = &u->lock;  in nfsd4_lock()
7516 		(long long) lock->lk_offset,  in nfsd4_lock()
7517 		(long long) lock->lk_length);  in nfsd4_lock()
7519 	if (check_lock_length(lock->lk_offset, lock->lk_length))  in nfsd4_lock()
7522 	if ((status = fh_verify(rqstp, &cstate->current_fh,  in nfsd4_lock()
7528 	if (lock->lk_is_new) {  in nfsd4_lock()
7531 			memcpy(&lock->lk_new_clientid,  in nfsd4_lock()
7532 				&cstate->clp->cl_clientid,  in nfsd4_lock()
7537 				        lock->lk_new_open_seqid,  in nfsd4_lock()
7538 		                        &lock->lk_new_open_stateid,  in nfsd4_lock()
7542 		mutex_unlock(&open_stp->st_mutex);  in nfsd4_lock()
7543 		open_sop = openowner(open_stp->st_stateowner);  in nfsd4_lock()
7545 		if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,  in nfsd4_lock()
7546 						&lock->lk_new_clientid))  in nfsd4_lock()
7552 				       lock->lk_old_lock_seqid,  in nfsd4_lock()
7553 				       &lock->lk_old_lock_stateid,  in nfsd4_lock()
7558 	lock_sop = lockowner(lock_stp->st_stateowner);  in nfsd4_lock()
7560 	lkflg = setlkflg(lock->lk_type);  in nfsd4_lock()
7566 	if (locks_in_grace(net) && !lock->lk_reclaim)  in nfsd4_lock()
7569 	if (!locks_in_grace(net) && lock->lk_reclaim)  in nfsd4_lock()
7572 	if (lock->lk_reclaim)  in nfsd4_lock()
7575 	fp = lock_stp->st_stid.sc_file;  in nfsd4_lock()
7576 	switch (lock->lk_type) {  in nfsd4_lock()
7582 			spin_lock(&fp->fi_lock);  in nfsd4_lock()
7586 			spin_unlock(&fp->fi_lock);  in nfsd4_lock()
7594 			spin_lock(&fp->fi_lock);  in nfsd4_lock()
7598 			spin_unlock(&fp->fi_lock);  in nfsd4_lock()
7612 	 * Most filesystems with their own ->lock operations will block  in nfsd4_lock()
7618 	if (nf->nf_file->f_op->lock)  in nfsd4_lock()
7621 	nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);  in nfsd4_lock()
7628 	file_lock = &nbl->nbl_lock;  in nfsd4_lock()
7629 	file_lock->fl_type = fl_type;  in nfsd4_lock()
7630 	file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));  in nfsd4_lock()
7631 	file_lock->fl_pid = current->tgid;  in nfsd4_lock()
7632 	file_lock->fl_file = nf->nf_file;  in nfsd4_lock()
7633 	file_lock->fl_flags = fl_flags;  in nfsd4_lock()
7634 	file_lock->fl_lmops = &nfsd_posix_mng_ops;  in nfsd4_lock()
7635 	file_lock->fl_start = lock->lk_offset;  in nfsd4_lock()
7636 	file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);  in nfsd4_lock()
7647 		nbl->nbl_time = ktime_get_boottime_seconds();  in nfsd4_lock()
7648 		spin_lock(&nn->blocked_locks_lock);  in nfsd4_lock()
7649 		list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);  in nfsd4_lock()
7650 		list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);  in nfsd4_lock()
7651 		kref_get(&nbl->nbl_kref);  in nfsd4_lock()
7652 		spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lock()
7655 	err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock);  in nfsd4_lock()
7658 		nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);  in nfsd4_lock()
7660 		if (lock->lk_reclaim)  in nfsd4_lock()
7661 			nn->somebody_reclaimed = true;  in nfsd4_lock()
7664 		kref_put(&nbl->nbl_kref, free_nbl);  in nfsd4_lock()
7667 	case -EAGAIN:		/* conflock holds conflicting lock */  in nfsd4_lock()
7670 		nfs4_set_lock_denied(conflock, &lock->lk_denied);  in nfsd4_lock()
7672 	case -EDEADLK:  in nfsd4_lock()
7684 			spin_lock(&nn->blocked_locks_lock);  in nfsd4_lock()
7685 			if (!list_empty(&nbl->nbl_list) &&  in nfsd4_lock()
7686 			    !list_empty(&nbl->nbl_lru)) {  in nfsd4_lock()
7687 				list_del_init(&nbl->nbl_list);  in nfsd4_lock()
7688 				list_del_init(&nbl->nbl_lru);  in nfsd4_lock()
7689 				kref_put(&nbl->nbl_kref, free_nbl);  in nfsd4_lock()
7692 			spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lock()
7700 		if (cstate->replay_owner &&  in nfsd4_lock()
7701 		    cstate->replay_owner != &lock_sop->lo_owner &&  in nfsd4_lock()
7703 			lock_sop->lo_owner.so_seqid++;  in nfsd4_lock()
7706 		 * If this is a new, never-before-used stateid, and we are  in nfsd4_lock()
7712 		mutex_unlock(&lock_stp->st_mutex);  in nfsd4_lock()
7714 		nfs4_put_stid(&lock_stp->st_stid);  in nfsd4_lock()
7717 		nfs4_put_stid(&open_stp->st_stid);  in nfsd4_lock()
7738 	inode = fhp->fh_dentry->d_inode;  in nfsd_test_lock()
7743 	lock->fl_file = nf->nf_file;  in nfsd_test_lock()
7744 	err = nfserrno(vfs_test_lock(nf->nf_file, lock));  in nfsd_test_lock()
7745 	lock->fl_file = NULL;  in nfsd_test_lock()
7759 	struct nfsd4_lockt *lockt = &u->lockt;  in nfsd4_lockt()
7768 	if (check_lock_length(lockt->lt_offset, lockt->lt_length))  in nfsd4_lockt()
7772 		status = set_client(&lockt->lt_clientid, cstate, nn);  in nfsd4_lockt()
7777 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))  in nfsd4_lockt()
7787 	switch (lockt->lt_type) {  in nfsd4_lockt()
7790 			file_lock->fl_type = F_RDLCK;  in nfsd4_lockt()
7794 			file_lock->fl_type = F_WRLCK;  in nfsd4_lockt()
7802 	lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);  in nfsd4_lockt()
7804 		file_lock->fl_owner = (fl_owner_t)lo;  in nfsd4_lockt()
7805 	file_lock->fl_pid = current->tgid;  in nfsd4_lockt()
7806 	file_lock->fl_flags = FL_POSIX;  in nfsd4_lockt()
7808 	file_lock->fl_start = lockt->lt_offset;  in nfsd4_lockt()
7809 	file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);  in nfsd4_lockt()
7813 	status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);  in nfsd4_lockt()
7817 	if (file_lock->fl_type != F_UNLCK) {  in nfsd4_lockt()
7819 		nfs4_set_lock_denied(file_lock, &lockt->lt_denied);  in nfsd4_lockt()
7823 		nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_lockt()
7833 	struct nfsd4_locku *locku = &u->locku;  in nfsd4_locku()
7842 		(long long) locku->lu_offset,  in nfsd4_locku()
7843 		(long long) locku->lu_length);  in nfsd4_locku()
7845 	if (check_lock_length(locku->lu_offset, locku->lu_length))  in nfsd4_locku()
7848 	status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,  in nfsd4_locku()
7849 					&locku->lu_stateid, NFS4_LOCK_STID,  in nfsd4_locku()
7853 	nf = find_any_file(stp->st_stid.sc_file);  in nfsd4_locku()
7865 	file_lock->fl_type = F_UNLCK;  in nfsd4_locku()
7866 	file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));  in nfsd4_locku()
7867 	file_lock->fl_pid = current->tgid;  in nfsd4_locku()
7868 	file_lock->fl_file = nf->nf_file;  in nfsd4_locku()
7869 	file_lock->fl_flags = FL_POSIX;  in nfsd4_locku()
7870 	file_lock->fl_lmops = &nfsd_posix_mng_ops;  in nfsd4_locku()
7871 	file_lock->fl_start = locku->lu_offset;  in nfsd4_locku()
7873 	file_lock->fl_end = last_byte_offset(locku->lu_offset,  in nfsd4_locku()
7874 						locku->lu_length);  in nfsd4_locku()
7877 	err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL);  in nfsd4_locku()
7882 	nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);  in nfsd4_locku()
7886 	mutex_unlock(&stp->st_mutex);  in nfsd4_locku()
7887 	nfs4_put_stid(&stp->st_stid);  in nfsd4_locku()
7913 	spin_lock(&fp->fi_lock);  in check_for_locks()
7921 	inode = file_inode(nf->nf_file);  in check_for_locks()
7924 	if (flctx && !list_empty_careful(&flctx->flc_posix)) {  in check_for_locks()
7925 		spin_lock(&flctx->flc_lock);  in check_for_locks()
7926 		list_for_each_entry(fl, &flctx->flc_posix, fl_list) {  in check_for_locks()
7927 			if (fl->fl_owner == (fl_owner_t)lowner) {  in check_for_locks()
7932 		spin_unlock(&flctx->flc_lock);  in check_for_locks()
7935 	spin_unlock(&fp->fi_lock);  in check_for_locks()
7940  * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations
7945  * Check if theree are any locks still held and if not - free the lockowner
7959 	struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;  in nfsd4_release_lockowner()
7961 	clientid_t *clid = &rlockowner->rl_clientid;  in nfsd4_release_lockowner()
7969 		clid->cl_boot, clid->cl_id);  in nfsd4_release_lockowner()
7974 	clp = cstate->clp;  in nfsd4_release_lockowner()
7976 	spin_lock(&clp->cl_lock);  in nfsd4_release_lockowner()
7977 	lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner);  in nfsd4_release_lockowner()
7979 		spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
7983 	list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {  in nfsd4_release_lockowner()
7984 		if (check_for_locks(stp->st_stid.sc_file, lo)) {  in nfsd4_release_lockowner()
7985 			spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
7986 			nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_release_lockowner()
7991 	while (!list_empty(&lo->lo_owner.so_stateids)) {  in nfsd4_release_lockowner()
7992 		stp = list_first_entry(&lo->lo_owner.so_stateids,  in nfsd4_release_lockowner()
7998 	spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
8002 	nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_release_lockowner()
8018 	return (crp && crp->cr_clp);  in nfs4_has_reclaimed_state()
8037 		INIT_LIST_HEAD(&crp->cr_strhash);  in nfs4_client_to_reclaim()
8038 		list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);  in nfs4_client_to_reclaim()
8039 		crp->cr_name.data = name.data;  in nfs4_client_to_reclaim()
8040 		crp->cr_name.len = name.len;  in nfs4_client_to_reclaim()
8041 		crp->cr_princhash.data = princhash.data;  in nfs4_client_to_reclaim()
8042 		crp->cr_princhash.len = princhash.len;  in nfs4_client_to_reclaim()
8043 		crp->cr_clp = NULL;  in nfs4_client_to_reclaim()
8044 		nn->reclaim_str_hashtbl_size++;  in nfs4_client_to_reclaim()
8052 	list_del(&crp->cr_strhash);  in nfs4_remove_reclaim_record()
8053 	kfree(crp->cr_name.data);  in nfs4_remove_reclaim_record()
8054 	kfree(crp->cr_princhash.data);  in nfs4_remove_reclaim_record()
8056 	nn->reclaim_str_hashtbl_size--;  in nfs4_remove_reclaim_record()
8066 		while (!list_empty(&nn->reclaim_str_hashtbl[i])) {  in nfs4_release_reclaim()
8067 			crp = list_entry(nn->reclaim_str_hashtbl[i].next,  in nfs4_release_reclaim()
8072 	WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);  in nfs4_release_reclaim()
8084 	list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {  in nfsd4_find_reclaim_client()
8085 		if (compare_blob(&crp->cr_name, &name) == 0) {  in nfsd4_find_reclaim_client()
8095 	if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))  in nfs4_check_open_reclaim()
8122 	max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);  in set_max_delegations()
8130 	nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,  in nfs4_state_create_net()
8133 	if (!nn->conf_id_hashtbl)  in nfs4_state_create_net()
8135 	nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,  in nfs4_state_create_net()
8138 	if (!nn->unconf_id_hashtbl)  in nfs4_state_create_net()
8140 	nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE,  in nfs4_state_create_net()
8143 	if (!nn->sessionid_hashtbl)  in nfs4_state_create_net()
8147 		INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);  in nfs4_state_create_net()
8148 		INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);  in nfs4_state_create_net()
8151 		INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);  in nfs4_state_create_net()
8152 	nn->conf_name_tree = RB_ROOT;  in nfs4_state_create_net()
8153 	nn->unconf_name_tree = RB_ROOT;  in nfs4_state_create_net()
8154 	nn->boot_time = ktime_get_real_seconds();  in nfs4_state_create_net()
8155 	nn->grace_ended = false;  in nfs4_state_create_net()
8156 	nn->nfsd4_manager.block_opens = true;  in nfs4_state_create_net()
8157 	INIT_LIST_HEAD(&nn->nfsd4_manager.list);  in nfs4_state_create_net()
8158 	INIT_LIST_HEAD(&nn->client_lru);  in nfs4_state_create_net()
8159 	INIT_LIST_HEAD(&nn->close_lru);  in nfs4_state_create_net()
8160 	INIT_LIST_HEAD(&nn->del_recall_lru);  in nfs4_state_create_net()
8161 	spin_lock_init(&nn->client_lock);  in nfs4_state_create_net()
8162 	spin_lock_init(&nn->s2s_cp_lock);  in nfs4_state_create_net()
8163 	idr_init(&nn->s2s_cp_stateids);  in nfs4_state_create_net()
8164 	atomic_set(&nn->pending_async_copies, 0);  in nfs4_state_create_net()
8166 	spin_lock_init(&nn->blocked_locks_lock);  in nfs4_state_create_net()
8167 	INIT_LIST_HEAD(&nn->blocked_locks_lru);  in nfs4_state_create_net()
8169 	INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);  in nfs4_state_create_net()
8170 	INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker);  in nfs4_state_create_net()
8173 	nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan;  in nfs4_state_create_net()
8174 	nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count;  in nfs4_state_create_net()
8175 	nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS;  in nfs4_state_create_net()
8177 	if (register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client"))  in nfs4_state_create_net()
8183 	kfree(nn->sessionid_hashtbl);  in nfs4_state_create_net()
8185 	kfree(nn->unconf_id_hashtbl);  in nfs4_state_create_net()
8187 	kfree(nn->conf_id_hashtbl);  in nfs4_state_create_net()
8189 	return -ENOMEM;  in nfs4_state_create_net()
8200 		while (!list_empty(&nn->conf_id_hashtbl[i])) {  in nfs4_state_destroy_net()
8201 			clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);  in nfs4_state_destroy_net()
8206 	WARN_ON(!list_empty(&nn->blocked_locks_lru));  in nfs4_state_destroy_net()
8209 		while (!list_empty(&nn->unconf_id_hashtbl[i])) {  in nfs4_state_destroy_net()
8210 			clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);  in nfs4_state_destroy_net()
8215 	kfree(nn->sessionid_hashtbl);  in nfs4_state_destroy_net()
8216 	kfree(nn->unconf_id_hashtbl);  in nfs4_state_destroy_net()
8217 	kfree(nn->conf_id_hashtbl);  in nfs4_state_destroy_net()
8230 	locks_start_grace(net, &nn->nfsd4_manager);  in nfs4_state_start_net()
8232 	if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)  in nfs4_state_start_net()
8234 	printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n",  in nfs4_state_start_net()
8235 	       nn->nfsd4_grace, net->ns.inum);  in nfs4_state_start_net()
8237 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);  in nfs4_state_start_net()
8242 			net->ns.inum);  in nfs4_state_start_net()
8243 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);  in nfs4_state_start_net()
8276 	unregister_shrinker(&nn->nfsd_client_shrinker);  in nfs4_state_shutdown_net()
8277 	cancel_work_sync(&nn->nfsd_shrinker_work);  in nfs4_state_shutdown_net()
8278 	cancel_delayed_work_sync(&nn->laundromat_work);  in nfs4_state_shutdown_net()
8279 	locks_end_grace(&nn->nfsd4_manager);  in nfs4_state_shutdown_net()
8283 	list_for_each_safe(pos, next, &nn->del_recall_lru) {  in nfs4_state_shutdown_net()
8286 		list_add(&dp->dl_recall_lru, &reaplist);  in nfs4_state_shutdown_net()
8291 		list_del_init(&dp->dl_recall_lru);  in nfs4_state_shutdown_net()
8314 		memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));  in get_stateid()
8320 	if (cstate->minorversion) {  in put_stateid()
8321 		memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));  in put_stateid()
8339 	put_stateid(cstate, &u->open_downgrade.od_stateid);  in nfsd4_set_opendowngradestateid()
8346 	put_stateid(cstate, &u->open.op_stateid);  in nfsd4_set_openstateid()
8353 	put_stateid(cstate, &u->close.cl_stateid);  in nfsd4_set_closestateid()
8360 	put_stateid(cstate, &u->lock.lk_resp_stateid);  in nfsd4_set_lockstateid()
8371 	get_stateid(cstate, &u->open_downgrade.od_stateid);  in nfsd4_get_opendowngradestateid()
8378 	get_stateid(cstate, &u->delegreturn.dr_stateid);  in nfsd4_get_delegreturnstateid()
8385 	get_stateid(cstate, &u->free_stateid.fr_stateid);  in nfsd4_get_freestateid()
8392 	get_stateid(cstate, &u->setattr.sa_stateid);  in nfsd4_get_setattrstateid()
8399 	get_stateid(cstate, &u->close.cl_stateid);  in nfsd4_get_closestateid()
8406 	get_stateid(cstate, &u->locku.lu_stateid);  in nfsd4_get_lockustateid()
8413 	get_stateid(cstate, &u->read.rd_stateid);  in nfsd4_get_readstateid()
8420 	get_stateid(cstate, &u->write.wr_stateid);  in nfsd4_get_writestateid()
8424  * nfsd4_deleg_getattr_conflict - Recall if GETATTR causes conflict
8454 	spin_lock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()
8455 	list_for_each_entry(fl, &ctx->flc_lease, fl_list) {  in nfsd4_deleg_getattr_conflict()
8456 		if (fl->fl_flags == FL_LAYOUT)  in nfsd4_deleg_getattr_conflict()
8458 		if (fl->fl_lmops != &nfsd_lease_mng_ops) {  in nfsd4_deleg_getattr_conflict()
8460 			 * non-nfs lease, if it's a lease with F_RDLCK then  in nfsd4_deleg_getattr_conflict()
8464 			if (fl->fl_type == F_RDLCK)  in nfsd4_deleg_getattr_conflict()
8468 		if (fl->fl_type == F_WRLCK) {  in nfsd4_deleg_getattr_conflict()
8469 			dp = fl->fl_owner;  in nfsd4_deleg_getattr_conflict()
8470 			if (dp->dl_recall.cb_clp == *(rqstp->rq_lease_breaker)) {  in nfsd4_deleg_getattr_conflict()
8471 				spin_unlock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()
8475 			spin_unlock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()
8485 	spin_unlock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()