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()
1072  * Considering nfsd_break_one_deleg is called with the flc->flc_lock held,
1079 	WARN_ON_ONCE(!list_empty(&stid->sc_cp_list));  in nfs4_free_deleg()
1080 	WARN_ON_ONCE(!list_empty(&dp->dl_perfile));  in nfs4_free_deleg()
1081 	WARN_ON_ONCE(!list_empty(&dp->dl_perclnt));  in nfs4_free_deleg()
1082 	WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru));  in nfs4_free_deleg()
1100  * low 3 bytes as hash-table indices.
1119 	if (bd->entries == 0)  in delegation_blocked()
1121 	if (ktime_get_seconds() - bd->swap_time > 30) {  in delegation_blocked()
1123 		if (ktime_get_seconds() - bd->swap_time > 30) {  in delegation_blocked()
1124 			bd->entries -= bd->old_entries;  in delegation_blocked()
1125 			bd->old_entries = bd->entries;  in delegation_blocked()
1126 			bd->new = 1-bd->new;  in delegation_blocked()
1127 			memset(bd->set[bd->new], 0,  in delegation_blocked()
1128 			       sizeof(bd->set[0]));  in delegation_blocked()
1129 			bd->swap_time = ktime_get_seconds();  in delegation_blocked()
1133 	hash = jhash(&fh->fh_raw, fh->fh_size, 0);  in delegation_blocked()
1134 	if (test_bit(hash&255, bd->set[0]) &&  in delegation_blocked()
1135 	    test_bit((hash>>8)&255, bd->set[0]) &&  in delegation_blocked()
1136 	    test_bit((hash>>16)&255, bd->set[0]))  in delegation_blocked()
1139 	if (test_bit(hash&255, bd->set[1]) &&  in delegation_blocked()
1140 	    test_bit((hash>>8)&255, bd->set[1]) &&  in delegation_blocked()
1141 	    test_bit((hash>>16)&255, bd->set[1]))  in delegation_blocked()
1152 	hash = jhash(&fh->fh_raw, fh->fh_size, 0);  in block_delegations()
1155 	__set_bit(hash&255, bd->set[bd->new]);  in block_delegations()
1156 	__set_bit((hash>>8)&255, bd->set[bd->new]);  in block_delegations()
1157 	__set_bit((hash>>16)&255, bd->set[bd->new]);  in block_delegations()
1158 	if (bd->entries == 0)  in block_delegations()
1159 		bd->swap_time = ktime_get_seconds();  in block_delegations()
1160 	bd->entries += 1;  in block_delegations()
1175 	if (delegation_blocked(&fp->fi_fhandle))  in alloc_init_deleg()
1186 	dp->dl_stid.sc_stateid.si_generation = 1;  in alloc_init_deleg()
1187 	INIT_LIST_HEAD(&dp->dl_perfile);  in alloc_init_deleg()
1188 	INIT_LIST_HEAD(&dp->dl_perclnt);  in alloc_init_deleg()
1189 	INIT_LIST_HEAD(&dp->dl_recall_lru);  in alloc_init_deleg()
1190 	dp->dl_clnt_odstate = odstate;  in alloc_init_deleg()
1192 	dp->dl_type = dl_type;  in alloc_init_deleg()
1193 	dp->dl_retries = 1;  in alloc_init_deleg()
1194 	dp->dl_recalled = false;  in alloc_init_deleg()
1195 	nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,  in alloc_init_deleg()
1198 	dp->dl_stid.sc_file = fp;  in alloc_init_deleg()
1208 	struct nfs4_file *fp = s->sc_file;  in nfs4_put_stid()
1209 	struct nfs4_client *clp = s->sc_client;  in nfs4_put_stid()
1211 	might_lock(&clp->cl_lock);  in nfs4_put_stid()
1213 	if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) {  in nfs4_put_stid()
1217 	idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);  in nfs4_put_stid()
1218 	nfs4_free_cpntf_statelist(clp->net, s);  in nfs4_put_stid()
1219 	spin_unlock(&clp->cl_lock);  in nfs4_put_stid()
1220 	s->sc_free(s);  in nfs4_put_stid()
1228 	stateid_t *src = &stid->sc_stateid;  in nfs4_inc_and_copy_stateid()
1230 	spin_lock(&stid->sc_lock);  in nfs4_inc_and_copy_stateid()
1231 	if (unlikely(++src->si_generation == 0))  in nfs4_inc_and_copy_stateid()
1232 		src->si_generation = 1;  in nfs4_inc_and_copy_stateid()
1234 	spin_unlock(&stid->sc_lock);  in nfs4_inc_and_copy_stateid()
1241 	spin_lock(&fp->fi_lock);  in put_deleg_file()
1242 	if (--fp->fi_delegees == 0)  in put_deleg_file()
1243 		swap(nf, fp->fi_deleg_file);  in put_deleg_file()
1244 	spin_unlock(&fp->fi_lock);  in put_deleg_file()
1252 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in nfs4_unlock_deleg_lease()
1253 	struct nfsd_file *nf = fp->fi_deleg_file;  in nfs4_unlock_deleg_lease()
1255 	WARN_ON_ONCE(!fp->fi_delegees);  in nfs4_unlock_deleg_lease()
1257 	vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp);  in nfs4_unlock_deleg_lease()
1263 	put_clnt_odstate(dp->dl_clnt_odstate);  in destroy_unhashed_deleg()
1265 	nfs4_put_stid(&dp->dl_stid);  in destroy_unhashed_deleg()
1270 	s->sc_type = 0;  in nfs4_unhash_stid()
1274  * nfs4_delegation_exists - Discover if this delegation already exists
1289 	lockdep_assert_held(&fp->fi_lock);  in nfs4_delegation_exists()
1291 	list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {  in nfs4_delegation_exists()
1292 		searchclp = searchdp->dl_stid.sc_client;  in nfs4_delegation_exists()
1301  * hash_delegation_locked - Add a delegation to the appropriate lists
1308  *      On error: -EAGAIN if one was previously granted to this
1316 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in hash_delegation_locked()
1319 	lockdep_assert_held(&fp->fi_lock);  in hash_delegation_locked()
1322 		return -EAGAIN;  in hash_delegation_locked()
1323 	refcount_inc(&dp->dl_stid.sc_count);  in hash_delegation_locked()
1324 	dp->dl_stid.sc_type = NFS4_DELEG_STID;  in hash_delegation_locked()
1325 	list_add(&dp->dl_perfile, &fp->fi_delegations);  in hash_delegation_locked()
1326 	list_add(&dp->dl_perclnt, &clp->cl_delegations);  in hash_delegation_locked()
1332 	return !(list_empty(&dp->dl_perfile));  in delegation_hashed()
1338 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in unhash_delegation_locked()
1345 	dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;  in unhash_delegation_locked()
1347 	++dp->dl_time;  in unhash_delegation_locked()
1348 	spin_lock(&fp->fi_lock);  in unhash_delegation_locked()
1349 	list_del_init(&dp->dl_perclnt);  in unhash_delegation_locked()
1350 	list_del_init(&dp->dl_recall_lru);  in unhash_delegation_locked()
1351 	list_del_init(&dp->dl_perfile);  in unhash_delegation_locked()
1352 	spin_unlock(&fp->fi_lock);  in unhash_delegation_locked()
1369 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in revoke_delegation()
1371 	WARN_ON(!list_empty(&dp->dl_recall_lru));  in revoke_delegation()
1373 	trace_nfsd_stid_revoke(&dp->dl_stid);  in revoke_delegation()
1375 	if (clp->cl_minorversion) {  in revoke_delegation()
1376 		spin_lock(&clp->cl_lock);  in revoke_delegation()
1377 		dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;  in revoke_delegation()
1378 		refcount_inc(&dp->dl_stid.sc_count);  in revoke_delegation()
1379 		list_add(&dp->dl_recall_lru, &clp->cl_revoked);  in revoke_delegation()
1380 		spin_unlock(&clp->cl_lock);  in revoke_delegation()
1408 	spin_lock(&fp->fi_lock);  in recalculate_deny_mode()
1409 	fp->fi_share_deny = 0;  in recalculate_deny_mode()
1410 	list_for_each_entry(stp, &fp->fi_stateids, st_perfile)  in recalculate_deny_mode()
1411 		fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);  in recalculate_deny_mode()
1412 	spin_unlock(&fp->fi_lock);  in recalculate_deny_mode()
1428 	/* Recalculate per-file deny mode if there was a change */  in reset_union_bmap_deny()
1430 		recalculate_deny_mode(stp->st_stid.sc_file);  in reset_union_bmap_deny()
1438 	struct nfs4_file *fp = stp->st_stid.sc_file;  in release_all_access()
1440 	if (fp && stp->st_deny_bmap != 0)  in release_all_access()
1445 			nfs4_file_put_access(stp->st_stid.sc_file, i);  in release_all_access()
1452 	kfree(sop->so_owner.data);  in nfs4_free_stateowner()
1453 	sop->so_ops->so_free(sop);  in nfs4_free_stateowner()
1458 	struct nfs4_client *clp = sop->so_client;  in nfs4_put_stateowner()
1460 	might_lock(&clp->cl_lock);  in nfs4_put_stateowner()
1462 	if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))  in nfs4_put_stateowner()
1464 	sop->so_ops->so_unhash(sop);  in nfs4_put_stateowner()
1465 	spin_unlock(&clp->cl_lock);  in nfs4_put_stateowner()
1472 	return list_empty(&stp->st_perfile);  in nfs4_ol_stateid_unhashed()
1477 	struct nfs4_file *fp = stp->st_stid.sc_file;  in unhash_ol_stateid()
1479 	lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);  in unhash_ol_stateid()
1481 	if (list_empty(&stp->st_perfile))  in unhash_ol_stateid()
1484 	spin_lock(&fp->fi_lock);  in unhash_ol_stateid()
1485 	list_del_init(&stp->st_perfile);  in unhash_ol_stateid()
1486 	spin_unlock(&fp->fi_lock);  in unhash_ol_stateid()
1487 	list_del(&stp->st_perstateowner);  in unhash_ol_stateid()
1495 	put_clnt_odstate(stp->st_clnt_odstate);  in nfs4_free_ol_stateid()
1497 	if (stp->st_stateowner)  in nfs4_free_ol_stateid()
1498 		nfs4_put_stateowner(stp->st_stateowner);  in nfs4_free_ol_stateid()
1499 	WARN_ON(!list_empty(&stid->sc_cp_list));  in nfs4_free_ol_stateid()
1506 	struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);  in nfs4_free_lock_stateid()
1509 	nf = find_any_file(stp->st_stid.sc_file);  in nfs4_free_lock_stateid()
1511 		get_file(nf->nf_file);  in nfs4_free_lock_stateid()
1512 		filp_close(nf->nf_file, (fl_owner_t)lo);  in nfs4_free_lock_stateid()
1526 	struct nfs4_stid *s = &stp->st_stid;  in put_ol_stateid_locked()
1527 	struct nfs4_client *clp = s->sc_client;  in put_ol_stateid_locked()
1529 	lockdep_assert_held(&clp->cl_lock);  in put_ol_stateid_locked()
1531 	WARN_ON_ONCE(!list_empty(&stp->st_locks));  in put_ol_stateid_locked()
1533 	if (!refcount_dec_and_test(&s->sc_count)) {  in put_ol_stateid_locked()
1538 	idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);  in put_ol_stateid_locked()
1539 	list_add(&stp->st_locks, reaplist);  in put_ol_stateid_locked()
1544 	lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);  in unhash_lock_stateid()
1548 	list_del_init(&stp->st_locks);  in unhash_lock_stateid()
1549 	nfs4_unhash_stid(&stp->st_stid);  in unhash_lock_stateid()
1555 	struct nfs4_client *clp = stp->st_stid.sc_client;  in release_lock_stateid()
1558 	spin_lock(&clp->cl_lock);  in release_lock_stateid()
1560 	spin_unlock(&clp->cl_lock);  in release_lock_stateid()
1562 		nfs4_put_stid(&stp->st_stid);  in release_lock_stateid()
1567 	struct nfs4_client *clp = lo->lo_owner.so_client;  in unhash_lockowner_locked()
1569 	lockdep_assert_held(&clp->cl_lock);  in unhash_lockowner_locked()
1571 	list_del_init(&lo->lo_owner.so_strhash);  in unhash_lockowner_locked()
1589 		list_del(&stp->st_locks);  in free_ol_stateid_reaplist()
1590 		fp = stp->st_stid.sc_file;  in free_ol_stateid_reaplist()
1591 		stp->st_stid.sc_free(&stp->st_stid);  in free_ol_stateid_reaplist()
1602 	lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);  in release_open_stateid_locks()
1604 	while (!list_empty(&open_stp->st_locks)) {  in release_open_stateid_locks()
1605 		stp = list_entry(open_stp->st_locks.next,  in release_open_stateid_locks()
1615 	lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);  in unhash_open_stateid()
1627 	spin_lock(&stp->st_stid.sc_client->cl_lock);  in release_open_stateid()
1630 	spin_unlock(&stp->st_stid.sc_client->cl_lock);  in release_open_stateid()
1636 	lockdep_assert_held(&oo->oo_owner.so_client->cl_lock);  in nfs4_openowner_unhashed()
1638 	return list_empty(&oo->oo_owner.so_strhash) &&  in nfs4_openowner_unhashed()
1639 		list_empty(&oo->oo_perclient);  in nfs4_openowner_unhashed()
1644 	struct nfs4_client *clp = oo->oo_owner.so_client;  in unhash_openowner_locked()
1646 	lockdep_assert_held(&clp->cl_lock);  in unhash_openowner_locked()
1648 	list_del_init(&oo->oo_owner.so_strhash);  in unhash_openowner_locked()
1649 	list_del_init(&oo->oo_perclient);  in unhash_openowner_locked()
1654 	struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,  in release_last_closed_stateid()
1658 	spin_lock(&nn->client_lock);  in release_last_closed_stateid()
1659 	s = oo->oo_last_closed_stid;  in release_last_closed_stateid()
1661 		list_del_init(&oo->oo_close_lru);  in release_last_closed_stateid()
1662 		oo->oo_last_closed_stid = NULL;  in release_last_closed_stateid()
1664 	spin_unlock(&nn->client_lock);  in release_last_closed_stateid()
1666 		nfs4_put_stid(&s->st_stid);  in release_last_closed_stateid()
1672 	struct nfs4_client *clp = oo->oo_owner.so_client;  in release_openowner()
1677 	spin_lock(&clp->cl_lock);  in release_openowner()
1679 	while (!list_empty(&oo->oo_owner.so_stateids)) {  in release_openowner()
1680 		stp = list_first_entry(&oo->oo_owner.so_stateids,  in release_openowner()
1685 	spin_unlock(&clp->cl_lock);  in release_openowner()
1688 	nfs4_put_stateowner(&oo->oo_owner);  in release_openowner()
1696 	return sid->sequence % SESSION_HASH_SIZE;  in hash_sessionid()
1703 	u32 *ptr = (u32 *)(&sessionid->data[0]);  in dump_sessionid()
1714  * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1719 	struct nfs4_stateowner *so = cstate->replay_owner;  in nfsd4_bump_seqid()
1730 	if (so->so_is_open_owner)  in nfsd4_bump_seqid()
1732 	so->so_seqid++;  in nfsd4_bump_seqid()
1739 	struct nfs4_client *clp = ses->se_client;  in gen_sessionid()
1742 	sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;  in gen_sessionid()
1743 	sid->clientid = clp->cl_clientid;  in gen_sessionid()
1744 	sid->sequence = current_sessionid++;  in gen_sessionid()
1745 	sid->reserved = 0;  in gen_sessionid()
1751  * the end of the initial SEQUENCE operation--the rest we regenerate
1757  * verifier), 12 for the compound header (with zero-length tag), and 44
1767 	for (i = 0; i < ses->se_fchannel.maxreqs; i++) {  in free_session_slots()
1768 		free_svc_cred(&ses->se_slots[i]->sl_cred);  in free_session_slots()
1769 		kfree(ses->se_slots[i]);  in free_session_slots()
1781 	if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)  in slot_bytes()
1784 		size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;  in slot_bytes()
1790  * re-negotiate active sessions and reduce their slot usage to make
1796 	u32 num = ca->maxreqs;  in nfsd4_get_drc_mem()
1802 		total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used;  in nfsd4_get_drc_mem()
1818 	 * over-allocation--it is better than failure.  in nfsd4_get_drc_mem()
1820 	scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads);  in nfsd4_get_drc_mem()
1837 	nfsd_drc_mem_used -= slotsize * ca->maxreqs;  in nfsd4_put_drc_mem()
1844 	int numslots = fattrs->maxreqs;  in alloc_session()
1857 		new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);  in alloc_session()
1858 		if (!new->se_slots[i])  in alloc_session()
1862 	memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));  in alloc_session()
1863 	memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));  in alloc_session()
1867 	while (i--)  in alloc_session()
1868 		kfree(new->se_slots[i]);  in alloc_session()
1875 	svc_xprt_put(c->cn_xprt);  in free_conn()
1882 	struct nfs4_client *clp = c->cn_session->se_client;  in nfsd4_conn_lost()
1886 	spin_lock(&clp->cl_lock);  in nfsd4_conn_lost()
1887 	if (!list_empty(&c->cn_persession)) {  in nfsd4_conn_lost()
1888 		list_del(&c->cn_persession);  in nfsd4_conn_lost()
1892 	spin_unlock(&clp->cl_lock);  in nfsd4_conn_lost()
1902 	svc_xprt_get(rqstp->rq_xprt);  in alloc_conn()
1903 	conn->cn_xprt = rqstp->rq_xprt;  in alloc_conn()
1904 	conn->cn_flags = flags;  in alloc_conn()
1905 	INIT_LIST_HEAD(&conn->cn_xpt_user.list);  in alloc_conn()
1911 	conn->cn_session = ses;  in __nfsd4_hash_conn()
1912 	list_add(&conn->cn_persession, &ses->se_conns);  in __nfsd4_hash_conn()
1917 	struct nfs4_client *clp = ses->se_client;  in nfsd4_hash_conn()
1919 	spin_lock(&clp->cl_lock);  in nfsd4_hash_conn()
1921 	spin_unlock(&clp->cl_lock);  in nfsd4_hash_conn()
1926 	conn->cn_xpt_user.callback = nfsd4_conn_lost;  in nfsd4_register_conn()
1927 	return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);  in nfsd4_register_conn()
1938 		nfsd4_conn_lost(&conn->cn_xpt_user);  in nfsd4_init_conn()
1940 	nfsd4_probe_callback_sync(ses->se_client);  in nfsd4_init_conn()
1947 	if (cses->flags & SESSION4_BACK_CHAN)  in alloc_conn_from_crses()
1955 	struct nfs4_client *clp = s->se_client;  in nfsd4_del_conns()
1958 	spin_lock(&clp->cl_lock);  in nfsd4_del_conns()
1959 	while (!list_empty(&s->se_conns)) {  in nfsd4_del_conns()
1960 		c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);  in nfsd4_del_conns()
1961 		list_del_init(&c->cn_persession);  in nfsd4_del_conns()
1962 		spin_unlock(&clp->cl_lock);  in nfsd4_del_conns()
1964 		unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);  in nfsd4_del_conns()
1967 		spin_lock(&clp->cl_lock);  in nfsd4_del_conns()
1969 	spin_unlock(&clp->cl_lock);  in nfsd4_del_conns()
1981 	nfsd4_put_drc_mem(&ses->se_fchannel);  in free_session()
1990 	new->se_client = clp;  in init_session()
1993 	INIT_LIST_HEAD(&new->se_conns);  in init_session()
1995 	new->se_cb_seq_nr = 1;  in init_session()
1996 	new->se_flags = cses->flags;  in init_session()
1997 	new->se_cb_prog = cses->callback_prog;  in init_session()
1998 	new->se_cb_sec = cses->cb_sec;  in init_session()
1999 	atomic_set(&new->se_ref, 0);  in init_session()
2000 	idx = hash_sessionid(&new->se_sessionid);  in init_session()
2001 	list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);  in init_session()
2002 	spin_lock(&clp->cl_lock);  in init_session()
2003 	list_add(&new->se_perclnt, &clp->cl_sessions);  in init_session()
2004 	spin_unlock(&clp->cl_lock);  in init_session()
2015 		rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);  in init_session()
2016 		clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);  in init_session()
2028 	lockdep_assert_held(&nn->client_lock);  in __find_in_sessionid_hashtbl()
2033 	list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {  in __find_in_sessionid_hashtbl()
2034 		if (!memcmp(elem->se_sessionid.data, sessionid->data,  in __find_in_sessionid_hashtbl()
2066 	struct nfs4_client *clp = ses->se_client;  in unhash_session()
2067 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_session()
2069 	lockdep_assert_held(&nn->client_lock);  in unhash_session()
2071 	list_del(&ses->se_hash);  in unhash_session()
2072 	spin_lock(&ses->se_client->cl_lock);  in unhash_session()
2073 	list_del(&ses->se_perclnt);  in unhash_session()
2074 	spin_unlock(&ses->se_client->cl_lock);  in unhash_session()
2086 	if (clid->cl_boot == (u32)nn->boot_time)  in STALE_CLIENTID()
2103 	if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) {  in alloc_client()
2104 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in alloc_client()
2110 	xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);  in alloc_client()
2111 	if (clp->cl_name.data == NULL)  in alloc_client()
2113 	clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,  in alloc_client()
2116 	if (!clp->cl_ownerstr_hashtbl)  in alloc_client()
2119 		INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);  in alloc_client()
2120 	INIT_LIST_HEAD(&clp->cl_sessions);  in alloc_client()
2121 	idr_init(&clp->cl_stateids);  in alloc_client()
2122 	atomic_set(&clp->cl_rpc_users, 0);  in alloc_client()
2123 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in alloc_client()
2124 	clp->cl_state = NFSD4_ACTIVE;  in alloc_client()
2125 	atomic_inc(&nn->nfs4_client_count);  in alloc_client()
2126 	atomic_set(&clp->cl_delegs_in_recall, 0);  in alloc_client()
2127 	INIT_LIST_HEAD(&clp->cl_idhash);  in alloc_client()
2128 	INIT_LIST_HEAD(&clp->cl_openowners);  in alloc_client()
2129 	INIT_LIST_HEAD(&clp->cl_delegations);  in alloc_client()
2130 	INIT_LIST_HEAD(&clp->cl_lru);  in alloc_client()
2131 	INIT_LIST_HEAD(&clp->cl_revoked);  in alloc_client()
2133 	INIT_LIST_HEAD(&clp->cl_lo_states);  in alloc_client()
2135 	INIT_LIST_HEAD(&clp->async_copies);  in alloc_client()
2136 	spin_lock_init(&clp->async_lock);  in alloc_client()
2137 	spin_lock_init(&clp->cl_lock);  in alloc_client()
2138 	rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");  in alloc_client()
2141 	kfree(clp->cl_name.data);  in alloc_client()
2152 	free_svc_cred(&clp->cl_cred);  in __free_client()
2153 	kfree(clp->cl_ownerstr_hashtbl);  in __free_client()
2154 	kfree(clp->cl_name.data);  in __free_client()
2155 	kfree(clp->cl_nii_domain.data);  in __free_client()
2156 	kfree(clp->cl_nii_name.data);  in __free_client()
2157 	idr_destroy(&clp->cl_stateids);  in __free_client()
2158 	kfree(clp->cl_ra);  in __free_client()
2164 	kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);  in drop_client()
2170 	while (!list_empty(&clp->cl_sessions)) {  in free_client()
2172 		ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,  in free_client()
2174 		list_del(&ses->se_perclnt);  in free_client()
2175 		WARN_ON_ONCE(atomic_read(&ses->se_ref));  in free_client()
2178 	rpc_destroy_wait_queue(&clp->cl_cb_waitq);  in free_client()
2179 	if (clp->cl_nfsd_dentry) {  in free_client()
2180 		nfsd_client_rmdir(clp->cl_nfsd_dentry);  in free_client()
2181 		clp->cl_nfsd_dentry = NULL;  in free_client()
2191 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_client_locked()
2194 	lockdep_assert_held(&nn->client_lock);  in unhash_client_locked()
2197 	clp->cl_time = 0;  in unhash_client_locked()
2199 	if (!list_empty(&clp->cl_idhash)) {  in unhash_client_locked()
2200 		list_del_init(&clp->cl_idhash);  in unhash_client_locked()
2201 		if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))  in unhash_client_locked()
2202 			rb_erase(&clp->cl_namenode, &nn->conf_name_tree);  in unhash_client_locked()
2204 			rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);  in unhash_client_locked()
2206 	list_del_init(&clp->cl_lru);  in unhash_client_locked()
2207 	spin_lock(&clp->cl_lock);  in unhash_client_locked()
2208 	list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)  in unhash_client_locked()
2209 		list_del_init(&ses->se_hash);  in unhash_client_locked()
2210 	spin_unlock(&clp->cl_lock);  in unhash_client_locked()
2216 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_client()
2218 	spin_lock(&nn->client_lock);  in unhash_client()
2220 	spin_unlock(&nn->client_lock);  in unhash_client()
2225 	if (atomic_read(&clp->cl_rpc_users))  in mark_client_expired_locked()
2234 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in __destroy_client()
2242 	while (!list_empty(&clp->cl_delegations)) {  in __destroy_client()
2243 		dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);  in __destroy_client()
2245 		list_add(&dp->dl_recall_lru, &reaplist);  in __destroy_client()
2250 		list_del_init(&dp->dl_recall_lru);  in __destroy_client()
2253 	while (!list_empty(&clp->cl_revoked)) {  in __destroy_client()
2254 		dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);  in __destroy_client()
2255 		list_del_init(&dp->dl_recall_lru);  in __destroy_client()
2256 		nfs4_put_stid(&dp->dl_stid);  in __destroy_client()
2258 	while (!list_empty(&clp->cl_openowners)) {  in __destroy_client()
2259 		oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);  in __destroy_client()
2260 		nfs4_get_stateowner(&oo->oo_owner);  in __destroy_client()
2266 		list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i],  in __destroy_client()
2269 			WARN_ON_ONCE(so->so_is_open_owner);  in __destroy_client()
2276 	if (clp->cl_cb_conn.cb_xprt)  in __destroy_client()
2277 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);  in __destroy_client()
2278 	atomic_add_unless(&nn->nfs4_client_count, -1, 0);  in __destroy_client()
2293 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in inc_reclaim_complete()
2295 	if (!nn->track_reclaim_completes)  in inc_reclaim_complete()
2297 	if (!nfsd4_find_reclaim_client(clp->cl_name, nn))  in inc_reclaim_complete()
2299 	if (atomic_inc_return(&nn->nr_reclaim_complete) ==  in inc_reclaim_complete()
2300 			nn->reclaim_str_hashtbl_size) {  in inc_reclaim_complete()
2302 				clp->net->ns.inum);  in inc_reclaim_complete()
2316 	memcpy(target->cl_verifier.data, source->data,  in copy_verf()
2317 			sizeof(target->cl_verifier.data));  in copy_verf()
2322 	target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;   in copy_clid()
2323 	target->cl_clientid.cl_id = source->cl_clientid.cl_id;   in copy_clid()
2328 	target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL);  in copy_cred()
2329 	target->cr_raw_principal = kstrdup(source->cr_raw_principal,  in copy_cred()
2331 	target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL);  in copy_cred()
2332 	if ((source->cr_principal && !target->cr_principal) ||  in copy_cred()
2333 	    (source->cr_raw_principal && !target->cr_raw_principal) ||  in copy_cred()
2334 	    (source->cr_targ_princ && !target->cr_targ_princ))  in copy_cred()
2335 		return -ENOMEM;  in copy_cred()
2337 	target->cr_flavor = source->cr_flavor;  in copy_cred()
2338 	target->cr_uid = source->cr_uid;  in copy_cred()
2339 	target->cr_gid = source->cr_gid;  in copy_cred()
2340 	target->cr_group_info = source->cr_group_info;  in copy_cred()
2341 	get_group_info(target->cr_group_info);  in copy_cred()
2342 	target->cr_gss_mech = source->cr_gss_mech;  in copy_cred()
2343 	if (source->cr_gss_mech)  in copy_cred()
2344 		gss_mech_get(source->cr_gss_mech);  in copy_cred()
2351 	if (o1->len < o2->len)  in compare_blob()
2352 		return -1;  in compare_blob()
2353 	if (o1->len > o2->len)  in compare_blob()
2355 	return memcmp(o1->data, o2->data, o1->len);  in compare_blob()
2361 	return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));  in same_verf()
2367 	return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);  in same_clid()
2374 	if (g1->ngroups != g2->ngroups)  in groups_equal()
2376 	for (i=0; i<g1->ngroups; i++)  in groups_equal()
2377 		if (!gid_eq(g1->gid[i], g2->gid[i]))  in groups_equal()
2386  * approximation.  We also don't want to allow non-gss use of a client
2394 	return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);  in is_gss_cred()
2402 		|| (!uid_eq(cr1->cr_uid, cr2->cr_uid))  in same_creds()
2403 		|| (!gid_eq(cr1->cr_gid, cr2->cr_gid))  in same_creds()
2404 		|| !groups_equal(cr1->cr_group_info, cr2->cr_group_info))  in same_creds()
2407 	if (cr1->cr_principal == cr2->cr_principal)  in same_creds()
2409 	if (!cr1->cr_principal || !cr2->cr_principal)  in same_creds()
2411 	return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);  in same_creds()
2416 	struct svc_cred *cr = &rqstp->rq_cred;  in svc_rqst_integrity_protected()
2419 	if (!cr->cr_gss_mech)  in svc_rqst_integrity_protected()
2421 	service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);  in svc_rqst_integrity_protected()
2428 	struct svc_cred *cr = &rqstp->rq_cred;  in nfsd4_mach_creds_match()
2430 	if (!cl->cl_mach_cred)  in nfsd4_mach_creds_match()
2432 	if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)  in nfsd4_mach_creds_match()
2436 	if (cl->cl_cred.cr_raw_principal)  in nfsd4_mach_creds_match()
2437 		return 0 == strcmp(cl->cl_cred.cr_raw_principal,  in nfsd4_mach_creds_match()
2438 						cr->cr_raw_principal);  in nfsd4_mach_creds_match()
2439 	if (!cr->cr_principal)  in nfsd4_mach_creds_match()
2441 	return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);  in nfsd4_mach_creds_match()
2449 	 * This is opaque to client, so no need to byte-swap. Use  in gen_confirm()
2453 	verf[1] = (__force __be32)nn->clverifier_counter++;  in gen_confirm()
2454 	memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));  in gen_confirm()
2459 	clp->cl_clientid.cl_boot = (u32)nn->boot_time;  in gen_clid()
2460 	clp->cl_clientid.cl_id = nn->clientid_counter++;  in gen_clid()
2469 	ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);  in find_stateid_locked()
2470 	if (!ret || !ret->sc_type)  in find_stateid_locked()
2480 	spin_lock(&cl->cl_lock);  in find_stateid_by_type()
2483 		if (typemask & s->sc_type)  in find_stateid_by_type()
2484 			refcount_inc(&s->sc_count);  in find_stateid_by_type()
2488 	spin_unlock(&cl->cl_lock);  in find_stateid_by_type()
2525 	struct inode *inode = file_inode(m->file);  in client_info_show()
2531 		return -ENXIO;  in client_info_show()
2532 	memcpy(&clid, &clp->cl_clientid, sizeof(clid));  in client_info_show()
2534 	seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);  in client_info_show()
2536 	if (clp->cl_state == NFSD4_COURTESY)  in client_info_show()
2538 	else if (clp->cl_state == NFSD4_EXPIRABLE)  in client_info_show()
2540 	else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))  in client_info_show()
2545 		ktime_get_boottime_seconds() - clp->cl_time);  in client_info_show()
2547 	seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);  in client_info_show()
2548 	seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);  in client_info_show()
2549 	if (clp->cl_nii_domain.data) {  in client_info_show()
2551 		seq_quote_mem(m, clp->cl_nii_domain.data,  in client_info_show()
2552 					clp->cl_nii_domain.len);  in client_info_show()
2554 		seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);  in client_info_show()
2556 			clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);  in client_info_show()
2558 	seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state));  in client_info_show()
2559 	seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr);  in client_info_show()
2568 	__acquires(&clp->cl_lock)  in states_start()
2570 	struct nfs4_client *clp = s->private;  in states_start()
2574 	spin_lock(&clp->cl_lock);  in states_start()
2575 	ret = idr_get_next_ul(&clp->cl_stateids, &id);  in states_start()
2582 	struct nfs4_client *clp = s->private;  in states_next()
2588 	ret = idr_get_next_ul(&clp->cl_stateids, &id);  in states_next()
2594 	__releases(&clp->cl_lock)  in states_stop()
2596 	struct nfs4_client *clp = s->private;  in states_stop()
2598 	spin_unlock(&clp->cl_lock);  in states_stop()
2603          seq_printf(s, "filename: \"%pD2\"", f->nf_file);  in nfs4_show_fname()
2608 	struct inode *inode = file_inode(f->nf_file);  in nfs4_show_superblock()
2611 					MAJOR(inode->i_sb->s_dev),  in nfs4_show_superblock()
2612 					 MINOR(inode->i_sb->s_dev),  in nfs4_show_superblock()
2613 					 inode->i_ino);  in nfs4_show_superblock()
2619 	seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);  in nfs4_show_owner()
2624 	seq_printf(s, "0x%.8x", stid->si_generation);  in nfs4_show_stateid()
2625 	seq_printf(s, "%12phN", &stid->si_opaque);  in nfs4_show_stateid()
2636 	if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)  in nfs4_show_open()
2639 	oo = ols->st_stateowner;  in nfs4_show_open()
2640 	nf = st->sc_file;  in nfs4_show_open()
2642 	spin_lock(&nf->fi_lock);  in nfs4_show_open()
2647 	seq_printf(s, "- ");  in nfs4_show_open()
2648 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_open()
2651 	access = bmap_to_share_mode(ols->st_access_bmap);  in nfs4_show_open()
2652 	deny   = bmap_to_share_mode(ols->st_deny_bmap);  in nfs4_show_open()
2655 		access & NFS4_SHARE_ACCESS_READ ? "r" : "-",  in nfs4_show_open()
2656 		access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");  in nfs4_show_open()
2658 		deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",  in nfs4_show_open()
2659 		deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");  in nfs4_show_open()
2668 	spin_unlock(&nf->fi_lock);  in nfs4_show_open()
2680 	oo = ols->st_stateowner;  in nfs4_show_lock()
2681 	nf = st->sc_file;  in nfs4_show_lock()
2682 	spin_lock(&nf->fi_lock);  in nfs4_show_lock()
2687 	seq_printf(s, "- ");  in nfs4_show_lock()
2688 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_lock()
2706 	spin_unlock(&nf->fi_lock);  in nfs4_show_lock()
2717 	nf = st->sc_file;  in nfs4_show_deleg()
2718 	spin_lock(&nf->fi_lock);  in nfs4_show_deleg()
2719 	file = nf->fi_deleg_file;  in nfs4_show_deleg()
2723 	seq_printf(s, "- ");  in nfs4_show_deleg()
2724 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_deleg()
2729 		ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");  in nfs4_show_deleg()
2738 	spin_unlock(&nf->fi_lock);  in nfs4_show_deleg()
2748 	file = ls->ls_file;  in nfs4_show_layout()
2750 	seq_printf(s, "- ");  in nfs4_show_layout()
2751 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_layout()
2768 	switch (st->sc_type) {  in states_show()
2798 		return -ENXIO;  in client_states_open()
2803 	s = file->private_data;  in client_states_open()
2804 	s->private = clp;  in client_states_open()
2810 	struct seq_file *m = file->private_data;  in client_opens_release()
2811 	struct nfs4_client *clp = m->private;  in client_opens_release()
2833 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in force_expire_client()
2836 	trace_nfsd_clid_admin_expired(&clp->cl_clientid);  in force_expire_client()
2838 	spin_lock(&nn->client_lock);  in force_expire_client()
2839 	clp->cl_time = 0;  in force_expire_client()
2840 	spin_unlock(&nn->client_lock);  in force_expire_client()
2842 	wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);  in force_expire_client()
2843 	spin_lock(&nn->client_lock);  in force_expire_client()
2844 	already_expired = list_empty(&clp->cl_lru);  in force_expire_client()
2847 	spin_unlock(&nn->client_lock);  in force_expire_client()
2852 		wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);  in force_expire_client()
2865 		return -EINVAL;  in client_ctl_write()
2868 		return -ENXIO;  in client_ctl_write()
2891 	switch (task->tk_status) {  in nfsd4_cb_recall_any_done()
2892 	case -NFS4ERR_DELAY:  in nfsd4_cb_recall_any_done()
2903 	struct nfs4_client *clp = cb->cb_clp;  in nfsd4_cb_recall_any_release()
2905 	clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);  in nfsd4_cb_recall_any_release()
2928 	ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);  in create_client()
2934 	kref_init(&clp->cl_nfsdfs.cl_ref);  in create_client()
2935 	nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);  in create_client()
2936 	clp->cl_time = ktime_get_boottime_seconds();  in create_client()
2937 	clear_bit(0, &clp->cl_cb_slot_busy);  in create_client()
2939 	memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));  in create_client()
2940 	clp->cl_cb_session = NULL;  in create_client()
2941 	clp->net = net;  in create_client()
2942 	clp->cl_nfsd_dentry = nfsd_client_mkdir(  in create_client()
2943 		nn, &clp->cl_nfsdfs,  in create_client()
2944 		clp->cl_clientid.cl_id - nn->clientid_base,  in create_client()
2946 	clp->cl_nfsd_info_dentry = dentries[0];  in create_client()
2947 	if (!clp->cl_nfsd_dentry) {  in create_client()
2951 	clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL);  in create_client()
2952 	if (!clp->cl_ra) {  in create_client()
2956 	clp->cl_ra_time = 0;  in create_client()
2957 	nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops,  in create_client()
2965 	struct rb_node **new = &(root->rb_node), *parent = NULL;  in add_clp_to_name_tree()
2972 		if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)  in add_clp_to_name_tree()
2973 			new = &((*new)->rb_left);  in add_clp_to_name_tree()
2975 			new = &((*new)->rb_right);  in add_clp_to_name_tree()
2978 	rb_link_node(&new_clp->cl_namenode, parent, new);  in add_clp_to_name_tree()
2979 	rb_insert_color(&new_clp->cl_namenode, root);  in add_clp_to_name_tree()
2986 	struct rb_node *node = root->rb_node;  in find_clp_in_name_tree()
2991 		cmp = compare_blob(&clp->cl_name, name);  in find_clp_in_name_tree()
2993 			node = node->rb_left;  in find_clp_in_name_tree()
2995 			node = node->rb_right;  in find_clp_in_name_tree()
3006 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in add_to_unconfirmed()
3008 	lockdep_assert_held(&nn->client_lock);  in add_to_unconfirmed()
3010 	clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);  in add_to_unconfirmed()
3011 	add_clp_to_name_tree(clp, &nn->unconf_name_tree);  in add_to_unconfirmed()
3012 	idhashval = clientid_hashval(clp->cl_clientid.cl_id);  in add_to_unconfirmed()
3013 	list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);  in add_to_unconfirmed()
3020 	unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);  in move_to_confirmed()
3021 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in move_to_confirmed()
3023 	lockdep_assert_held(&nn->client_lock);  in move_to_confirmed()
3025 	list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);  in move_to_confirmed()
3026 	rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);  in move_to_confirmed()
3027 	add_clp_to_name_tree(clp, &nn->conf_name_tree);  in move_to_confirmed()
3028 	set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);  in move_to_confirmed()
3029 	trace_nfsd_clid_confirmed(&clp->cl_clientid);  in move_to_confirmed()
3037 	unsigned int idhashval = clientid_hashval(clid->cl_id);  in find_client_in_id_table()
3040 		if (same_clid(&clp->cl_clientid, clid)) {  in find_client_in_id_table()
3041 			if ((bool)clp->cl_minorversion != sessions)  in find_client_in_id_table()
3053 	struct list_head *tbl = nn->conf_id_hashtbl;  in find_confirmed_client()
3055 	lockdep_assert_held(&nn->client_lock);  in find_confirmed_client()
3062 	struct list_head *tbl = nn->unconf_id_hashtbl;  in find_unconfirmed_client()
3064 	lockdep_assert_held(&nn->client_lock);  in find_unconfirmed_client()
3070 	return clp->cl_exchange_flags != 0;  in clp_used_exchangeid()
3076 	lockdep_assert_held(&nn->client_lock);  in find_confirmed_client_by_name()
3077 	return find_clp_in_name_tree(name, &nn->conf_name_tree);  in find_confirmed_client_by_name()
3083 	lockdep_assert_held(&nn->client_lock);  in find_unconfirmed_client_by_name()
3084 	return find_clp_in_name_tree(name, &nn->unconf_name_tree);  in find_unconfirmed_client_by_name()
3090 	struct nfs4_cb_conn *conn = &clp->cl_cb_conn;  in gen_callback()
3096 	if (se->se_callback_netid_len == 3 &&  in gen_callback()
3097 	    !memcmp(se->se_callback_netid_val, "tcp", 3))  in gen_callback()
3099 	else if (se->se_callback_netid_len == 4 &&  in gen_callback()
3100 		 !memcmp(se->se_callback_netid_val, "tcp6", 4))  in gen_callback()
3105 	conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,  in gen_callback()
3106 					    se->se_callback_addr_len,  in gen_callback()
3107 					    (struct sockaddr *)&conn->cb_addr,  in gen_callback()
3108 					    sizeof(conn->cb_addr));  in gen_callback()
3110 	if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)  in gen_callback()
3113 	if (conn->cb_addr.ss_family == AF_INET6)  in gen_callback()
3114 		((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;  in gen_callback()
3116 	conn->cb_prog = se->se_callback_prog;  in gen_callback()
3117 	conn->cb_ident = se->se_callback_ident;  in gen_callback()
3118 	memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);  in gen_callback()
3122 	conn->cb_addr.ss_family = AF_UNSPEC;  in gen_callback()
3123 	conn->cb_addrlen = 0;  in gen_callback()
3134 	struct xdr_buf *buf = resp->xdr->buf;  in nfsd4_store_cache_entry()
3135 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_store_cache_entry()
3138 	dprintk("--> %s slot %p\n", __func__, slot);  in nfsd4_store_cache_entry()
3140 	slot->sl_flags |= NFSD4_SLOT_INITIALIZED;  in nfsd4_store_cache_entry()
3141 	slot->sl_opcnt = resp->opcnt;  in nfsd4_store_cache_entry()
3142 	slot->sl_status = resp->cstate.status;  in nfsd4_store_cache_entry()
3143 	free_svc_cred(&slot->sl_cred);  in nfsd4_store_cache_entry()
3144 	copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred);  in nfsd4_store_cache_entry()
3147 		slot->sl_flags &= ~NFSD4_SLOT_CACHED;  in nfsd4_store_cache_entry()
3150 	slot->sl_flags |= NFSD4_SLOT_CACHED;  in nfsd4_store_cache_entry()
3152 	base = resp->cstate.data_offset;  in nfsd4_store_cache_entry()
3153 	slot->sl_datalen = buf->len - base;  in nfsd4_store_cache_entry()
3154 	if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))  in nfsd4_store_cache_entry()
3163  * operation which sets resp->p and increments resp->opcnt for
3172 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_enc_sequence_replay()
3175 	op = &args->ops[resp->opcnt - 1];  in nfsd4_enc_sequence_replay()
3178 	if (slot->sl_flags & NFSD4_SLOT_CACHED)  in nfsd4_enc_sequence_replay()
3179 		return op->status;  in nfsd4_enc_sequence_replay()
3180 	if (args->opcnt == 1) {  in nfsd4_enc_sequence_replay()
3182 		 * The original operation wasn't a solo sequence--we  in nfsd4_enc_sequence_replay()
3183 		 * always cache those--so this retry must not match the  in nfsd4_enc_sequence_replay()
3186 		op->status = nfserr_seq_false_retry;  in nfsd4_enc_sequence_replay()
3188 		op = &args->ops[resp->opcnt++];  in nfsd4_enc_sequence_replay()
3189 		op->status = nfserr_retry_uncached_rep;  in nfsd4_enc_sequence_replay()
3192 	return op->status;  in nfsd4_enc_sequence_replay()
3203 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_replay_cache_entry()
3204 	struct xdr_stream *xdr = resp->xdr;  in nfsd4_replay_cache_entry()
3208 	dprintk("--> %s slot %p\n", __func__, slot);  in nfsd4_replay_cache_entry()
3210 	status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);  in nfsd4_replay_cache_entry()
3214 	p = xdr_reserve_space(xdr, slot->sl_datalen);  in nfsd4_replay_cache_entry()
3219 	xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);  in nfsd4_replay_cache_entry()
3222 	resp->opcnt = slot->sl_opcnt;  in nfsd4_replay_cache_entry()
3223 	return slot->sl_status;  in nfsd4_replay_cache_entry()
3233 	new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;  in nfsd4_set_ex_flags()
3235 	new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;  in nfsd4_set_ex_flags()
3239 	new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;  in nfsd4_set_ex_flags()
3242 	clid->flags = new->cl_exchange_flags;  in nfsd4_set_ex_flags()
3249 	list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {  in client_has_openowners()
3250 		if (!list_empty(&oo->oo_owner.so_stateids))  in client_has_openowners()
3260 		|| !list_empty(&clp->cl_lo_states)  in client_has_state()
3262 		|| !list_empty(&clp->cl_delegations)  in client_has_state()
3263 		|| !list_empty(&clp->cl_sessions)  in client_has_state()
3264 		|| !list_empty(&clp->async_copies);  in client_has_state()
3270 	if (!exid->nii_domain.data)  in copy_impl_id()
3272 	xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);  in copy_impl_id()
3273 	if (!clp->cl_nii_domain.data)  in copy_impl_id()
3275 	xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);  in copy_impl_id()
3276 	if (!clp->cl_nii_name.data)  in copy_impl_id()
3278 	clp->cl_nii_time = exid->nii_time;  in copy_impl_id()
3286 	struct nfsd4_exchange_id *exid = &u->exchange_id;  in nfsd4_exchange_id()
3291 	nfs4_verifier		verf = exid->verifier;  in nfsd4_exchange_id()
3293 	bool	update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;  in nfsd4_exchange_id()
3299 		__func__, rqstp, exid, exid->clname.len, exid->clname.data,  in nfsd4_exchange_id()
3300 		addr_str, exid->flags, exid->spa_how);  in nfsd4_exchange_id()
3302 	if (exid->flags & ~EXCHGID4_FLAG_MASK_A)  in nfsd4_exchange_id()
3305 	new = create_client(exid->clname, rqstp, &verf);  in nfsd4_exchange_id()
3312 	switch (exid->spa_how) {  in nfsd4_exchange_id()
3314 		exid->spo_must_enforce[0] = 0;  in nfsd4_exchange_id()
3315 		exid->spo_must_enforce[1] = (  in nfsd4_exchange_id()
3316 			1 << (OP_BIND_CONN_TO_SESSION - 32) |  in nfsd4_exchange_id()
3317 			1 << (OP_EXCHANGE_ID - 32) |  in nfsd4_exchange_id()
3318 			1 << (OP_CREATE_SESSION - 32) |  in nfsd4_exchange_id()
3319 			1 << (OP_DESTROY_SESSION - 32) |  in nfsd4_exchange_id()
3320 			1 << (OP_DESTROY_CLIENTID - 32));  in nfsd4_exchange_id()
3322 		exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |  in nfsd4_exchange_id()
3327 		exid->spo_must_allow[1] &= (  in nfsd4_exchange_id()
3328 					1 << (OP_TEST_STATEID - 32) |  in nfsd4_exchange_id()
3329 					1 << (OP_FREE_STATEID - 32));  in nfsd4_exchange_id()
3339 		if (!new->cl_cred.cr_principal &&  in nfsd4_exchange_id()
3340 					!new->cl_cred.cr_raw_principal) {  in nfsd4_exchange_id()
3344 		new->cl_mach_cred = true;  in nfsd4_exchange_id()
3357 	spin_lock(&nn->client_lock);  in nfsd4_exchange_id()
3358 	conf = find_confirmed_client_by_name(&exid->clname, nn);  in nfsd4_exchange_id()
3360 		bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);  in nfsd4_exchange_id()
3361 		bool verfs_match = same_verf(&verf, &conf->cl_verifier);  in nfsd4_exchange_id()
3381 			exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;  in nfsd4_exchange_id()
3394 			conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;  in nfsd4_exchange_id()
3409 	unconf = find_unconfirmed_client_by_name(&exid->clname, nn);  in nfsd4_exchange_id()
3421 		trace_nfsd_clid_replaced(&conf->cl_clientid);  in nfsd4_exchange_id()
3423 	new->cl_minorversion = cstate->minorversion;  in nfsd4_exchange_id()
3424 	new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];  in nfsd4_exchange_id()
3425 	new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];  in nfsd4_exchange_id()
3430 	exid->clientid.cl_boot = conf->cl_clientid.cl_boot;  in nfsd4_exchange_id()
3431 	exid->clientid.cl_id = conf->cl_clientid.cl_id;  in nfsd4_exchange_id()
3433 	exid->seqid = conf->cl_cs_slot.sl_seqid + 1;  in nfsd4_exchange_id()
3437 		conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);  in nfsd4_exchange_id()
3441 	spin_unlock(&nn->client_lock);  in nfsd4_exchange_id()
3446 		trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);  in nfsd4_exchange_id()
3465 	/* Note unsigned 32-bit arithmetic handles wraparound: */  in check_slot_seqid()
3476  * Do this for solo or embedded create session operations.
3482 	slot->sl_status = nfserr;  in nfsd4_cache_create_session()
3483 	memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));  in nfsd4_cache_create_session()
3490 	memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));  in nfsd4_replay_create_session()
3491 	return slot->sl_status;  in nfsd4_replay_create_session()
3513 	u32 maxrpc = nn->nfsd_serv->sv_max_mesg;  in check_forechannel_attrs()
3515 	if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)  in check_forechannel_attrs()
3517 	if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)  in check_forechannel_attrs()
3519 	ca->headerpadsz = 0;  in check_forechannel_attrs()
3520 	ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);  in check_forechannel_attrs()
3521 	ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);  in check_forechannel_attrs()
3522 	ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);  in check_forechannel_attrs()
3523 	ca->maxresp_cached = min_t(u32, ca->maxresp_cached,  in check_forechannel_attrs()
3525 	ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);  in check_forechannel_attrs()
3536 	ca->maxreqs = nfsd4_get_drc_mem(ca, nn);  in check_forechannel_attrs()
3542  * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
3559 	ca->headerpadsz = 0;  in check_backchannel_attrs()
3561 	if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)  in check_backchannel_attrs()
3563 	if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)  in check_backchannel_attrs()
3565 	ca->maxresp_cached = 0;  in check_backchannel_attrs()
3566 	if (ca->maxops < 2)  in check_backchannel_attrs()
3574 	switch (cbs->flavor) {  in nfsd4_check_cb_sec()
3594 	struct nfsd4_create_session *cr_ses = &u->create_session;  in nfsd4_create_session()
3604 	if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)  in nfsd4_create_session()
3606 	status = nfsd4_check_cb_sec(&cr_ses->cb_sec);  in nfsd4_create_session()
3609 	status = check_forechannel_attrs(&cr_ses->fore_channel, nn);  in nfsd4_create_session()
3612 	status = check_backchannel_attrs(&cr_ses->back_channel);  in nfsd4_create_session()
3616 	new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);  in nfsd4_create_session()
3623 	spin_lock(&nn->client_lock);  in nfsd4_create_session()
3624 	unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);  in nfsd4_create_session()
3625 	conf = find_confirmed_client(&cr_ses->clientid, true, nn);  in nfsd4_create_session()
3632 		cs_slot = &conf->cl_cs_slot;  in nfsd4_create_session()
3633 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);  in nfsd4_create_session()
3641 		if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||  in nfsd4_create_session()
3642 		    !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {  in nfsd4_create_session()
3649 		cs_slot = &unconf->cl_cs_slot;  in nfsd4_create_session()
3650 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);  in nfsd4_create_session()
3656 		old = find_confirmed_client_by_name(&unconf->cl_name, nn);  in nfsd4_create_session()
3663 			trace_nfsd_clid_replaced(&old->cl_clientid);  in nfsd4_create_session()
3673 	cr_ses->flags &= ~SESSION4_PERSIST;  in nfsd4_create_session()
3675 	cr_ses->flags &= ~SESSION4_RDMA;  in nfsd4_create_session()
3680 	memcpy(cr_ses->sessionid.data, new->se_sessionid.data,  in nfsd4_create_session()
3682 	cs_slot->sl_seqid++;  in nfsd4_create_session()
3683 	cr_ses->seqid = cs_slot->sl_seqid;  in nfsd4_create_session()
3685 	/* cache solo and embedded create sessions under the client_lock */  in nfsd4_create_session()
3687 	spin_unlock(&nn->client_lock);  in nfsd4_create_session()
3689 		fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);  in nfsd4_create_session()
3697 	spin_unlock(&nn->client_lock);  in nfsd4_create_session()
3704 	nfsd4_put_drc_mem(&cr_ses->fore_channel);  in nfsd4_create_session()
3726 	struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;  in nfsd4_backchannel_ctl()
3727 	struct nfsd4_session *session = cstate->session;  in nfsd4_backchannel_ctl()
3731 	status = nfsd4_check_cb_sec(&bc->bc_cb_sec);  in nfsd4_backchannel_ctl()
3734 	spin_lock(&nn->client_lock);  in nfsd4_backchannel_ctl()
3735 	session->se_cb_prog = bc->bc_cb_program;  in nfsd4_backchannel_ctl()
3736 	session->se_cb_sec = bc->bc_cb_sec;  in nfsd4_backchannel_ctl()
3737 	spin_unlock(&nn->client_lock);  in nfsd4_backchannel_ctl()
3739 	nfsd4_probe_callback(session->se_client);  in nfsd4_backchannel_ctl()
3748 	list_for_each_entry(c, &s->se_conns, cn_persession) {  in __nfsd4_find_conn()
3749 		if (c->cn_xprt == xpt) {  in __nfsd4_find_conn()
3759 	struct nfs4_client *clp = session->se_client;  in nfsd4_match_existing_connection()
3760 	struct svc_xprt *xpt = rqst->rq_xprt;  in nfsd4_match_existing_connection()
3765 	spin_lock(&clp->cl_lock);  in nfsd4_match_existing_connection()
3769 	else if (req == c->cn_flags)  in nfsd4_match_existing_connection()
3772 				c->cn_flags != NFS4_CDFC4_BACK)  in nfsd4_match_existing_connection()
3775 				c->cn_flags != NFS4_CDFC4_FORE)  in nfsd4_match_existing_connection()
3779 	spin_unlock(&clp->cl_lock);  in nfsd4_match_existing_connection()
3789 	struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;  in nfsd4_bind_conn_to_session()
3798 	spin_lock(&nn->client_lock);  in nfsd4_bind_conn_to_session()
3799 	session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);  in nfsd4_bind_conn_to_session()
3800 	spin_unlock(&nn->client_lock);  in nfsd4_bind_conn_to_session()
3804 	if (!nfsd4_mach_creds_match(session->se_client, rqstp))  in nfsd4_bind_conn_to_session()
3807 			bcts->dir, &conn);  in nfsd4_bind_conn_to_session()
3809 		if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH ||  in nfsd4_bind_conn_to_session()
3810 				bcts->dir == NFS4_CDFC4_BACK)  in nfsd4_bind_conn_to_session()
3811 			conn->cn_flags |= NFS4_CDFC4_BACK;  in nfsd4_bind_conn_to_session()
3812 		nfsd4_probe_callback(session->se_client);  in nfsd4_bind_conn_to_session()
3817 	status = nfsd4_map_bcts_dir(&bcts->dir);  in nfsd4_bind_conn_to_session()
3820 	conn = alloc_conn(rqstp, bcts->dir);  in nfsd4_bind_conn_to_session()
3834 	if (!cstate->session)  in nfsd4_compound_in_session()
3836 	return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid));  in nfsd4_compound_in_session()
3843 	struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid;  in nfsd4_destroy_session()
3857 	spin_lock(&nn->client_lock);  in nfsd4_destroy_session()
3862 	if (!nfsd4_mach_creds_match(ses->se_client, r))  in nfsd4_destroy_session()
3868 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_session()
3870 	nfsd4_probe_callback_sync(ses->se_client);  in nfsd4_destroy_session()
3872 	spin_lock(&nn->client_lock);  in nfsd4_destroy_session()
3877 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_session()
3884 	struct nfs4_client *clp = ses->se_client;  in nfsd4_sequence_check_conn()
3889 	spin_lock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3890 	c = __nfsd4_find_conn(new->cn_xprt, ses);  in nfsd4_sequence_check_conn()
3894 	if (clp->cl_mach_cred)  in nfsd4_sequence_check_conn()
3897 	spin_unlock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3901 		nfsd4_conn_lost(&new->cn_xpt_user);  in nfsd4_sequence_check_conn()
3904 	spin_unlock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3911 	struct nfsd4_compoundargs *args = rqstp->rq_argp;  in nfsd4_session_too_many_ops()
3913 	return args->opcnt > session->se_fchannel.maxops;  in nfsd4_session_too_many_ops()
3919 	struct xdr_buf *xb = &rqstp->rq_arg;  in nfsd4_request_too_big()
3921 	return xb->len > session->se_fchannel.maxreq_sz;  in nfsd4_request_too_big()
3927 	struct nfsd4_compoundargs *argp = rqstp->rq_argp;  in replay_matches_cache()
3929 	if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) !=  in replay_matches_cache()
3930 	    (bool)seq->cachethis)  in replay_matches_cache()
3936 	if (slot->sl_opcnt < argp->opcnt && !slot->sl_status)  in replay_matches_cache()
3943 	if (slot->sl_opcnt > argp->opcnt)  in replay_matches_cache()
3946 	if (!same_creds(&rqstp->rq_cred, &slot->sl_cred))  in replay_matches_cache()
3961 	struct nfsd4_sequence *seq = &u->sequence;  in nfsd4_sequence()
3962 	struct nfsd4_compoundres *resp = rqstp->rq_resp;  in nfsd4_sequence()
3963 	struct xdr_stream *xdr = resp->xdr;  in nfsd4_sequence()
3973 	if (resp->opcnt != 1)  in nfsd4_sequence()
3984 	spin_lock(&nn->client_lock);  in nfsd4_sequence()
3985 	session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);  in nfsd4_sequence()
3988 	clp = session->se_client;  in nfsd4_sequence()
3999 	if (seq->slotid >= session->se_fchannel.maxreqs)  in nfsd4_sequence()
4002 	slot = session->se_slots[seq->slotid];  in nfsd4_sequence()
4003 	dprintk("%s: slotid %d\n", __func__, seq->slotid);  in nfsd4_sequence()
4008 	seq->maxslots = session->se_fchannel.maxreqs;  in nfsd4_sequence()
4010 	status = check_slot_seqid(seq->seqid, slot->sl_seqid,  in nfsd4_sequence()
4011 					slot->sl_flags & NFSD4_SLOT_INUSE);  in nfsd4_sequence()
4014 		if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))  in nfsd4_sequence()
4019 		cstate->slot = slot;  in nfsd4_sequence()
4020 		cstate->session = session;  in nfsd4_sequence()
4021 		cstate->clp = clp;  in nfsd4_sequence()
4022 		/* Return the cached reply status and set cstate->status  in nfsd4_sequence()
4025 		cstate->status = nfserr_replay_cache;  in nfsd4_sequence()
4036 	buflen = (seq->cachethis) ?  in nfsd4_sequence()
4037 			session->se_fchannel.maxresp_cached :  in nfsd4_sequence()
4038 			session->se_fchannel.maxresp_sz;  in nfsd4_sequence()
4039 	status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :  in nfsd4_sequence()
4041 	if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))  in nfsd4_sequence()
4047 	slot->sl_seqid = seq->seqid;  in nfsd4_sequence()
4048 	slot->sl_flags |= NFSD4_SLOT_INUSE;  in nfsd4_sequence()
4049 	if (seq->cachethis)  in nfsd4_sequence()
4050 		slot->sl_flags |= NFSD4_SLOT_CACHETHIS;  in nfsd4_sequence()
4052 		slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;  in nfsd4_sequence()
4054 	cstate->slot = slot;  in nfsd4_sequence()
4055 	cstate->session = session;  in nfsd4_sequence()
4056 	cstate->clp = clp;  in nfsd4_sequence()
4059 	switch (clp->cl_cb_state) {  in nfsd4_sequence()
4061 		seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;  in nfsd4_sequence()
4064 		seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;  in nfsd4_sequence()
4067 		seq->status_flags = 0;  in nfsd4_sequence()
4069 	if (!list_empty(&clp->cl_revoked))  in nfsd4_sequence()
4070 		seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;  in nfsd4_sequence()
4074 	spin_unlock(&nn->client_lock);  in nfsd4_sequence()
4084 	struct nfsd4_compound_state *cs = &resp->cstate;  in nfsd4_sequence_done()
4087 		if (cs->status != nfserr_replay_cache) {  in nfsd4_sequence_done()
4089 			cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;  in nfsd4_sequence_done()
4092 		nfsd4_put_session(cs->session);  in nfsd4_sequence_done()
4093 	} else if (cs->clp)  in nfsd4_sequence_done()
4094 		put_client_renew(cs->clp);  in nfsd4_sequence_done()
4102 	struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;  in nfsd4_destroy_clientid()
4108 	spin_lock(&nn->client_lock);  in nfsd4_destroy_clientid()
4109 	unconf = find_unconfirmed_client(&dc->clientid, true, nn);  in nfsd4_destroy_clientid()
4110 	conf = find_confirmed_client(&dc->clientid, true, nn);  in nfsd4_destroy_clientid()
4133 	trace_nfsd_clid_destroyed(&clp->cl_clientid);  in nfsd4_destroy_clientid()
4136 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_clientid()
4146 	struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;  in nfsd4_reclaim_complete()
4147 	struct nfs4_client *clp = cstate->clp;  in nfsd4_reclaim_complete()
4150 	if (rc->rca_one_fs) {  in nfsd4_reclaim_complete()
4151 		if (!cstate->current_fh.fh_dentry)  in nfsd4_reclaim_complete()
4161 	if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))  in nfsd4_reclaim_complete()
4176 	trace_nfsd_clid_reclaim_complete(&clp->cl_clientid);  in nfsd4_reclaim_complete()
4187 	struct nfsd4_setclientid *setclid = &u->setclientid;  in nfsd4_setclientid()
4188 	struct xdr_netobj 	clname = setclid->se_name;  in nfsd4_setclientid()
4189 	nfs4_verifier		clverifier = setclid->se_verf;  in nfsd4_setclientid()
4198 	spin_lock(&nn->client_lock);  in nfsd4_setclientid()
4204 		if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid()
4213 		if (same_verf(&conf->cl_verifier, &clverifier)) {  in nfsd4_setclientid()
4221 	new->cl_minorversion = 0;  in nfsd4_setclientid()
4224 	setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;  in nfsd4_setclientid()
4225 	setclid->se_clientid.cl_id = new->cl_clientid.cl_id;  in nfsd4_setclientid()
4226 	memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));  in nfsd4_setclientid()
4230 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid()
4234 		trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);  in nfsd4_setclientid()
4246 			&u->setclientid_confirm;  in nfsd4_setclientid_confirm()
4249 	nfs4_verifier confirm = setclientid_confirm->sc_confirm;   in nfsd4_setclientid_confirm()
4250 	clientid_t * clid = &setclientid_confirm->sc_clientid;  in nfsd4_setclientid_confirm()
4257 	spin_lock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4268 	if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid_confirm()
4272 	if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid_confirm()
4276 	if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {  in nfsd4_setclientid_confirm()
4277 		if (conf && same_verf(&confirm, &conf->cl_confirm)) {  in nfsd4_setclientid_confirm()
4287 		nfsd4_change_callback(conf, &unconf->cl_cb_conn);  in nfsd4_setclientid_confirm()
4289 		old = find_confirmed_client_by_name(&unconf->cl_name, nn);  in nfsd4_setclientid_confirm()
4293 					&& !same_creds(&unconf->cl_cred,  in nfsd4_setclientid_confirm()
4294 							&old->cl_cred)) {  in nfsd4_setclientid_confirm()
4303 			trace_nfsd_clid_replaced(&old->cl_clientid);  in nfsd4_setclientid_confirm()
4309 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4311 		fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);  in nfsd4_setclientid_confirm()
4313 	spin_lock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4316 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4331 	refcount_set(&fp->fi_ref, 1);  in nfsd4_file_init()
4332 	spin_lock_init(&fp->fi_lock);  in nfsd4_file_init()
4333 	INIT_LIST_HEAD(&fp->fi_stateids);  in nfsd4_file_init()
4334 	INIT_LIST_HEAD(&fp->fi_delegations);  in nfsd4_file_init()
4335 	INIT_LIST_HEAD(&fp->fi_clnt_odstate);  in nfsd4_file_init()
4336 	fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle);  in nfsd4_file_init()
4337 	fp->fi_deleg_file = NULL;  in nfsd4_file_init()
4338 	fp->fi_had_conflict = false;  in nfsd4_file_init()
4339 	fp->fi_share_deny = 0;  in nfsd4_file_init()
4340 	memset(fp->fi_fds, 0, sizeof(fp->fi_fds));  in nfsd4_file_init()
4341 	memset(fp->fi_access, 0, sizeof(fp->fi_access));  in nfsd4_file_init()
4342 	fp->fi_aliased = false;  in nfsd4_file_init()
4343 	fp->fi_inode = d_inode(fh->fh_dentry);  in nfsd4_file_init()
4345 	INIT_LIST_HEAD(&fp->fi_lo_states);  in nfsd4_file_init()
4346 	atomic_set(&fp->fi_lo_recalls, 0);  in nfsd4_file_init()
4408 	return -ENOMEM;  in nfsd4_init_slabs()
4418 	count = atomic_read(&nn->nfsd_courtesy_clients);  in nfsd4_state_shrinker_count()
4422 		queue_work(laundry_wq, &nn->nfsd_shrinker_work);  in nfsd4_state_shrinker_count()
4438 	nn->nfsd4_lease = 90;	/* default lease time */  in nfsd4_init_leases_net()
4439 	nn->nfsd4_grace = 90;  in nfsd4_init_leases_net()
4440 	nn->somebody_reclaimed = false;  in nfsd4_init_leases_net()
4441 	nn->track_reclaim_completes = false;  in nfsd4_init_leases_net()
4442 	nn->clverifier_counter = get_random_u32();  in nfsd4_init_leases_net()
4443 	nn->clientid_base = get_random_u32();  in nfsd4_init_leases_net()
4444 	nn->clientid_counter = nn->clientid_base + 1;  in nfsd4_init_leases_net()
4445 	nn->s2s_cp_cl_id = nn->clientid_counter++;  in nfsd4_init_leases_net()
4447 	atomic_set(&nn->nfs4_client_count, 0);  in nfsd4_init_leases_net()
4451 	nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB);  in nfsd4_init_leases_net()
4453 	atomic_set(&nn->nfsd_courtesy_clients, 0);  in nfsd4_init_leases_net()
4458 	rp->rp_status = nfserr_serverfault;  in init_nfs4_replay()
4459 	rp->rp_buflen = 0;  in init_nfs4_replay()
4460 	rp->rp_buf = rp->rp_ibuf;  in init_nfs4_replay()
4461 	mutex_init(&rp->rp_mutex);  in init_nfs4_replay()
4468 		mutex_lock(&so->so_replay.rp_mutex);  in nfsd4_cstate_assign_replay()
4469 		cstate->replay_owner = nfs4_get_stateowner(so);  in nfsd4_cstate_assign_replay()
4475 	struct nfs4_stateowner *so = cstate->replay_owner;  in nfsd4_cstate_clear_replay()
4478 		cstate->replay_owner = NULL;  in nfsd4_cstate_clear_replay()
4479 		mutex_unlock(&so->so_replay.rp_mutex);  in nfsd4_cstate_clear_replay()
4492 	xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);  in alloc_stateowner()
4493 	if (!sop->so_owner.data) {  in alloc_stateowner()
4498 	INIT_LIST_HEAD(&sop->so_stateids);  in alloc_stateowner()
4499 	sop->so_client = clp;  in alloc_stateowner()
4500 	init_nfs4_replay(&sop->so_replay);  in alloc_stateowner()
4501 	atomic_set(&sop->so_count, 1);  in alloc_stateowner()
4507 	lockdep_assert_held(&clp->cl_lock);  in hash_openowner()
4509 	list_add(&oo->oo_owner.so_strhash,  in hash_openowner()
4510 		 &clp->cl_ownerstr_hashtbl[strhashval]);  in hash_openowner()
4511 	list_add(&oo->oo_perclient, &clp->cl_openowners);  in hash_openowner()
4535 	struct nfs4_openowner *oo = open->op_openowner;  in nfsd4_find_existing_open()
4537 	lockdep_assert_held(&fp->fi_lock);  in nfsd4_find_existing_open()
4539 	list_for_each_entry(local, &fp->fi_stateids, st_perfile) {  in nfsd4_find_existing_open()
4541 		if (local->st_stateowner->so_is_open_owner == 0)  in nfsd4_find_existing_open()
4543 		if (local->st_stateowner != &oo->oo_owner)  in nfsd4_find_existing_open()
4545 		if (local->st_stid.sc_type == NFS4_OPEN_STID) {  in nfsd4_find_existing_open()
4547 			refcount_inc(&ret->st_stid.sc_count);  in nfsd4_find_existing_open()
4559 	switch (s->sc_type) {  in nfsd4_verify_open_stid()
4579 	mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX);  in nfsd4_lock_ol_stateid()
4580 	ret = nfsd4_verify_open_stid(&stp->st_stid);  in nfsd4_lock_ol_stateid()
4582 		mutex_unlock(&stp->st_mutex);  in nfsd4_lock_ol_stateid()
4591 		spin_lock(&fp->fi_lock);  in nfsd4_find_and_lock_existing_open()
4593 		spin_unlock(&fp->fi_lock);  in nfsd4_find_and_lock_existing_open()
4596 		nfs4_put_stid(&stp->st_stid);  in nfsd4_find_and_lock_existing_open()
4605 	struct nfs4_client *clp = cstate->clp;  in alloc_init_open_stateowner()
4608 	oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);  in alloc_init_open_stateowner()
4611 	oo->oo_owner.so_ops = &openowner_ops;  in alloc_init_open_stateowner()
4612 	oo->oo_owner.so_is_open_owner = 1;  in alloc_init_open_stateowner()
4613 	oo->oo_owner.so_seqid = open->op_seqid;  in alloc_init_open_stateowner()
4614 	oo->oo_flags = 0;  in alloc_init_open_stateowner()
4616 		oo->oo_flags |= NFS4_OO_CONFIRMED;  in alloc_init_open_stateowner()
4617 	oo->oo_time = 0;  in alloc_init_open_stateowner()
4618 	oo->oo_last_closed_stid = NULL;  in alloc_init_open_stateowner()
4619 	INIT_LIST_HEAD(&oo->oo_close_lru);  in alloc_init_open_stateowner()
4620 	spin_lock(&clp->cl_lock);  in alloc_init_open_stateowner()
4626 		nfs4_free_stateowner(&oo->oo_owner);  in alloc_init_open_stateowner()
4628 	spin_unlock(&clp->cl_lock);  in alloc_init_open_stateowner()
4636 	struct nfs4_openowner *oo = open->op_openowner;  in init_open_stateid()
4640 	stp = open->op_stp;  in init_open_stateid()
4642 	mutex_init(&stp->st_mutex);  in init_open_stateid()
4643 	mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);  in init_open_stateid()
4646 	spin_lock(&oo->oo_owner.so_client->cl_lock);  in init_open_stateid()
4647 	spin_lock(&fp->fi_lock);  in init_open_stateid()
4650 		mutex_unlock(&stp->st_mutex);  in init_open_stateid()
4659 	open->op_stp = NULL;  in init_open_stateid()
4660 	refcount_inc(&stp->st_stid.sc_count);  in init_open_stateid()
4661 	stp->st_stid.sc_type = NFS4_OPEN_STID;  in init_open_stateid()
4662 	INIT_LIST_HEAD(&stp->st_locks);  in init_open_stateid()
4663 	stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);  in init_open_stateid()
4665 	stp->st_stid.sc_file = fp;  in init_open_stateid()
4666 	stp->st_access_bmap = 0;  in init_open_stateid()
4667 	stp->st_deny_bmap = 0;  in init_open_stateid()
4668 	stp->st_openstp = NULL;  in init_open_stateid()
4669 	list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);  in init_open_stateid()
4670 	list_add(&stp->st_perfile, &fp->fi_stateids);  in init_open_stateid()
4673 	spin_unlock(&fp->fi_lock);  in init_open_stateid()
4674 	spin_unlock(&oo->oo_owner.so_client->cl_lock);  in init_open_stateid()
4678 			nfs4_put_stid(&retstp->st_stid);  in init_open_stateid()
4682 		mutex_unlock(&stp->st_mutex);  in init_open_stateid()
4697 	struct nfs4_openowner *oo = openowner(s->st_stateowner);  in move_to_close_lru()
4698 	struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,  in move_to_close_lru()
4712 	wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2);  in move_to_close_lru()
4715 	if (s->st_stid.sc_file) {  in move_to_close_lru()
4716 		put_nfs4_file(s->st_stid.sc_file);  in move_to_close_lru()
4717 		s->st_stid.sc_file = NULL;  in move_to_close_lru()
4720 	spin_lock(&nn->client_lock);  in move_to_close_lru()
4721 	last = oo->oo_last_closed_stid;  in move_to_close_lru()
4722 	oo->oo_last_closed_stid = s;  in move_to_close_lru()
4723 	list_move_tail(&oo->oo_close_lru, &nn->close_lru);  in move_to_close_lru()
4724 	oo->oo_time = ktime_get_boottime_seconds();  in move_to_close_lru()
4725 	spin_unlock(&nn->client_lock);  in move_to_close_lru()
4727 		nfs4_put_stid(&last->st_stid);  in move_to_close_lru()
4733 	struct inode *inode = d_inode(fhp->fh_dentry);  in nfsd4_file_hash_lookup()
4741 		if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {  in nfsd4_file_hash_lookup()
4742 			if (refcount_inc_not_zero(&fi->fi_ref)) {  in nfsd4_file_hash_lookup()
4757  * inode->i_lock prevents racing insertions from adding an entry
4763 	struct inode *inode = d_inode(fhp->fh_dentry);  in nfsd4_file_hash_insert()
4771 	spin_lock(&inode->i_lock);  in nfsd4_file_hash_insert()
4776 		if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {  in nfsd4_file_hash_insert()
4777 			if (refcount_inc_not_zero(&fi->fi_ref))  in nfsd4_file_hash_insert()
4780 			fi->fi_aliased = alias_found = true;  in nfsd4_file_hash_insert()
4786 	err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist,  in nfsd4_file_hash_insert()
4791 	new->fi_aliased = alias_found;  in nfsd4_file_hash_insert()
4795 	spin_unlock(&inode->i_lock);  in nfsd4_file_hash_insert()
4802 	rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist,  in nfsd4_file_hash_remove()
4821 	spin_lock(&fp->fi_lock);  in nfs4_share_conflict()
4822 	if (fp->fi_share_deny & deny_type)  in nfs4_share_conflict()
4824 	spin_unlock(&fp->fi_lock);  in nfs4_share_conflict()
4833 	return ctx && !list_empty_careful(&ctx->flc_lease);  in nfsd4_deleg_present()
4837  * nfsd_wait_for_delegreturn - wait for delegations to be returned
4839  * @inode: in-core inode of the file being waited for
4861 	struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,  in nfsd4_cb_recall_prepare()
4864 	block_delegations(&dp->dl_stid.sc_file->fi_fhandle);  in nfsd4_cb_recall_prepare()
4868 	 * already holding inode->i_lock.  in nfsd4_cb_recall_prepare()
4874 	if (delegation_hashed(dp) && dp->dl_time == 0) {  in nfsd4_cb_recall_prepare()
4875 		dp->dl_time = ktime_get_boottime_seconds();  in nfsd4_cb_recall_prepare()
4876 		list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);  in nfsd4_cb_recall_prepare()
4886 	trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task);  in nfsd4_cb_recall_done()
4888 	if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID ||  in nfsd4_cb_recall_done()
4889 	    dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID)  in nfsd4_cb_recall_done()
4892 	switch (task->tk_status) {  in nfsd4_cb_recall_done()
4895 	case -NFS4ERR_DELAY:  in nfsd4_cb_recall_done()
4898 	case -EBADHANDLE:  in nfsd4_cb_recall_done()
4899 	case -NFS4ERR_BAD_STATEID:  in nfsd4_cb_recall_done()
4904 		if (dp->dl_retries--) {  in nfsd4_cb_recall_done()
4918 	nfs4_put_stid(&dp->dl_stid);  in nfsd4_cb_recall_release()
4937 	refcount_inc(&dp->dl_stid.sc_count);  in nfsd_break_one_deleg()
4938 	queued = nfsd4_run_cb(&dp->dl_recall);  in nfsd_break_one_deleg()
4941 		refcount_dec(&dp->dl_stid.sc_count);  in nfsd_break_one_deleg()
4948 	struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;  in nfsd_break_deleg_cb()
4949 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in nfsd_break_deleg_cb()
4950 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in nfsd_break_deleg_cb()
4953 	trace_nfsd_cb_recall(&dp->dl_stid);  in nfsd_break_deleg_cb()
4955 	dp->dl_recalled = true;  in nfsd_break_deleg_cb()
4956 	atomic_inc(&clp->cl_delegs_in_recall);  in nfsd_break_deleg_cb()
4958 		nn = net_generic(clp->net, nfsd_net_id);  in nfsd_break_deleg_cb()
4959 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in nfsd_break_deleg_cb()
4967 	fl->fl_break_time = 0;  in nfsd_break_deleg_cb()
4969 	fp->fi_had_conflict = true;  in nfsd_break_deleg_cb()
4975  * nfsd_breaker_owns_lease - Check if lease conflict was resolved
4984 	struct nfs4_delegation *dl = fl->fl_owner;  in nfsd_breaker_owns_lease()
4992 	if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4)  in nfsd_breaker_owns_lease()
4994 	clp = *(rqst->rq_lease_breaker);  in nfsd_breaker_owns_lease()
4995 	return dl->dl_stid.sc_client == clp;  in nfsd_breaker_owns_lease()
5002 	struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner;  in nfsd_change_deleg_cb()
5003 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in nfsd_change_deleg_cb()
5006 		if (dp->dl_recalled)  in nfsd_change_deleg_cb()
5007 			atomic_dec(&clp->cl_delegs_in_recall);  in nfsd_change_deleg_cb()
5010 		return -EAGAIN;  in nfsd_change_deleg_cb()
5023 	if (seqid == so->so_seqid - 1)  in nfsd4_check_seqid()
5025 	if (seqid == so->so_seqid)  in nfsd4_check_seqid()
5035 	spin_lock(&nn->client_lock);  in lookup_clientid()
5038 		atomic_inc(&found->cl_rpc_users);  in lookup_clientid()
5039 	spin_unlock(&nn->client_lock);  in lookup_clientid()
5047 	if (cstate->clp) {  in set_client()
5048 		if (!same_clid(&cstate->clp->cl_clientid, clid))  in set_client()
5056 	 * set cstate->clp), so session = false:  in set_client()
5058 	cstate->clp = lookup_clientid(clid, false, nn);  in set_client()
5059 	if (!cstate->clp)  in set_client()
5068 	clientid_t *clientid = &open->op_clientid;  in nfsd4_process_open1()
5078 	open->op_file = nfsd4_alloc_file();  in nfsd4_process_open1()
5079 	if (open->op_file == NULL)  in nfsd4_process_open1()
5085 	clp = cstate->clp;  in nfsd4_process_open1()
5087 	strhashval = ownerstr_hashval(&open->op_owner);  in nfsd4_process_open1()
5089 	open->op_openowner = oo;  in nfsd4_process_open1()
5093 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {  in nfsd4_process_open1()
5096 		open->op_openowner = NULL;  in nfsd4_process_open1()
5099 	status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);  in nfsd4_process_open1()
5107 	open->op_openowner = oo;  in nfsd4_process_open1()
5109 	open->op_stp = nfs4_alloc_open_stateid(clp);  in nfsd4_process_open1()
5110 	if (!open->op_stp)  in nfsd4_process_open1()
5114 	    (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {  in nfsd4_process_open1()
5115 		open->op_odstate = alloc_clnt_odstate(clp);  in nfsd4_process_open1()
5116 		if (!open->op_odstate)  in nfsd4_process_open1()
5126 	if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))  in nfs4_check_delegmode()
5150 	return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||  in nfsd4_is_deleg_cur()
5151 	       open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;  in nfsd4_is_deleg_cur()
5162 	deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);  in nfs4_check_deleg()
5165 	if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) {  in nfs4_check_deleg()
5166 		nfs4_put_stid(&deleg->dl_stid);  in nfs4_check_deleg()
5167 		if (cl->cl_minorversion)  in nfs4_check_deleg()
5171 	flags = share_access_to_flags(open->op_share_access);  in nfs4_check_deleg()
5174 		nfs4_put_stid(&deleg->dl_stid);  in nfs4_check_deleg()
5183 	open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;  in nfs4_check_deleg()
5209 	if (!open->op_truncate)  in nfsd4_truncate()
5211 	if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))  in nfsd4_truncate()
5222 	int oflag = nfs4_access_to_omode(open->op_share_access);  in nfs4_get_vfs_file()
5223 	int access = nfs4_access_to_access(open->op_share_access);  in nfs4_get_vfs_file()
5226 	spin_lock(&fp->fi_lock);  in nfs4_get_vfs_file()
5232 	status = nfs4_file_check_deny(fp, open->op_share_deny);  in nfs4_get_vfs_file()
5235 			spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5239 				stp, open->op_share_deny, false))  in nfs4_get_vfs_file()
5241 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5246 	status = nfs4_file_get_access(fp, open->op_share_access);  in nfs4_get_vfs_file()
5249 			spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5253 				stp, open->op_share_access, true))  in nfs4_get_vfs_file()
5255 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5260 	old_access_bmap = stp->st_access_bmap;  in nfs4_get_vfs_file()
5261 	set_access(open->op_share_access, stp);  in nfs4_get_vfs_file()
5264 	old_deny_bmap = stp->st_deny_bmap;  in nfs4_get_vfs_file()
5265 	set_deny(open->op_share_deny, stp);  in nfs4_get_vfs_file()
5266 	fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);  in nfs4_get_vfs_file()
5268 	if (!fp->fi_fds[oflag]) {  in nfs4_get_vfs_file()
5269 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5272 						  open->op_filp, &nf);  in nfs4_get_vfs_file()
5276 		spin_lock(&fp->fi_lock);  in nfs4_get_vfs_file()
5277 		if (!fp->fi_fds[oflag]) {  in nfs4_get_vfs_file()
5278 			fp->fi_fds[oflag] = nf;  in nfs4_get_vfs_file()
5282 	spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
5286 	status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode,  in nfs4_get_vfs_file()
5297 	stp->st_access_bmap = old_access_bmap;  in nfs4_get_vfs_file()
5298 	nfs4_file_put_access(fp, open->op_share_access);  in nfs4_get_vfs_file()
5309 	unsigned char old_deny_bmap = stp->st_deny_bmap;  in nfs4_upgrade_open()
5311 	if (!test_access(open->op_share_access, stp))  in nfs4_upgrade_open()
5315 	spin_lock(&fp->fi_lock);  in nfs4_upgrade_open()
5316 	status = nfs4_file_check_deny(fp, open->op_share_deny);  in nfs4_upgrade_open()
5319 		set_deny(open->op_share_deny, stp);  in nfs4_upgrade_open()
5320 		fp->fi_share_deny |=  in nfs4_upgrade_open()
5321 			(open->op_share_deny & NFS4_SHARE_DENY_BOTH);  in nfs4_upgrade_open()
5325 				stp, open->op_share_deny, false))  in nfs4_upgrade_open()
5329 	spin_unlock(&fp->fi_lock);  in nfs4_upgrade_open()
5343 	if (clp->cl_cb_state == NFSD4_CB_UP)  in nfsd4_cb_channel_good()
5350 	return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;  in nfsd4_cb_channel_good()
5361 	fl->fl_lmops = &nfsd_lease_mng_ops;  in nfs4_alloc_init_lease()
5362 	fl->fl_flags = FL_DELEG;  in nfs4_alloc_init_lease()
5363 	fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;  in nfs4_alloc_init_lease()
5364 	fl->fl_end = OFFSET_MAX;  in nfs4_alloc_init_lease()
5365 	fl->fl_owner = (fl_owner_t)dp;  in nfs4_alloc_init_lease()
5366 	fl->fl_pid = current->tgid;  in nfs4_alloc_init_lease()
5367 	fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file;  in nfs4_alloc_init_lease()
5375 	struct file *f = fp->fi_deleg_file->nf_file;  in nfsd4_check_conflicting_opens()
5379 	writes = atomic_read(&ino->i_writecount);  in nfsd4_check_conflicting_opens()
5389 	if (fp->fi_aliased)  in nfsd4_check_conflicting_opens()
5390 		return -EAGAIN;  in nfsd4_check_conflicting_opens()
5398 	if (fp->fi_fds[O_WRONLY])  in nfsd4_check_conflicting_opens()
5399 		writes--;  in nfsd4_check_conflicting_opens()
5400 	if (fp->fi_fds[O_RDWR])  in nfsd4_check_conflicting_opens()
5401 		writes--;  in nfsd4_check_conflicting_opens()
5403 		return -EAGAIN; /* There may be non-NFSv4 writers */  in nfsd4_check_conflicting_opens()
5405 	 * It's possible there are non-NFSv4 write opens in progress,  in nfsd4_check_conflicting_opens()
5411 	spin_lock(&fp->fi_lock);  in nfsd4_check_conflicting_opens()
5412 	list_for_each_entry(st, &fp->fi_stateids, st_perfile) {  in nfsd4_check_conflicting_opens()
5413 		if (st->st_openstp == NULL /* it's an open */ &&  in nfsd4_check_conflicting_opens()
5415 		    st->st_stid.sc_client != clp) {  in nfsd4_check_conflicting_opens()
5416 			spin_unlock(&fp->fi_lock);  in nfsd4_check_conflicting_opens()
5417 			return -EAGAIN;  in nfsd4_check_conflicting_opens()
5420 	spin_unlock(&fp->fi_lock);  in nfsd4_check_conflicting_opens()
5443 	err = nfsd_lookup_dentry(open->op_rqstp, parent,  in nfsd4_verify_deleg_dentry()
5444 				 open->op_fname, open->op_fnamelen,  in nfsd4_verify_deleg_dentry()
5448 		return -EAGAIN;  in nfsd4_verify_deleg_dentry()
5452 	if (child != file_dentry(fp->fi_deleg_file->nf_file))  in nfsd4_verify_deleg_dentry()
5453 		return -EAGAIN;  in nfsd4_verify_deleg_dentry()
5467 	struct inode *inode = file_inode(nf->nf_file);  in nfsd4_verify_setuid_write()
5469 	if ((open->op_share_access & NFS4_SHARE_ACCESS_WRITE) &&  in nfsd4_verify_setuid_write()
5470 	    (inode->i_mode & (S_ISUID|S_ISGID)))  in nfsd4_verify_setuid_write()
5471 		return -EAGAIN;  in nfsd4_verify_setuid_write()
5480 	struct nfs4_client *clp = stp->st_stid.sc_client;  in nfs4_set_delegation()
5481 	struct nfs4_file *fp = stp->st_stid.sc_file;  in nfs4_set_delegation()
5482 	struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate;  in nfs4_set_delegation()
5493 	if (fp->fi_had_conflict)  in nfs4_set_delegation()
5494 		return ERR_PTR(-EAGAIN);  in nfs4_set_delegation()
5508 	if ((open->op_share_access & NFS4_SHARE_ACCESS_BOTH) == NFS4_SHARE_ACCESS_BOTH) {  in nfs4_set_delegation()
5517 	if (!nf && (open->op_share_access & NFS4_SHARE_ACCESS_READ)) {  in nfs4_set_delegation()
5523 		return ERR_PTR(-EAGAIN);  in nfs4_set_delegation()
5526 	spin_lock(&fp->fi_lock);  in nfs4_set_delegation()
5528 		status = -EAGAIN;  in nfs4_set_delegation()
5530 		status = -EAGAIN;  in nfs4_set_delegation()
5531 	else if (!fp->fi_deleg_file) {  in nfs4_set_delegation()
5532 		fp->fi_deleg_file = nf;  in nfs4_set_delegation()
5535 		fp->fi_delegees = 1;  in nfs4_set_delegation()
5538 		fp->fi_delegees++;  in nfs4_set_delegation()
5539 	spin_unlock(&fp->fi_lock);  in nfs4_set_delegation()
5546 	status = -ENOMEM;  in nfs4_set_delegation()
5555 	status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL);  in nfs4_set_delegation()
5575 	status = nfsd4_verify_setuid_write(open, fp->fi_deleg_file);  in nfs4_set_delegation()
5579 	status = -EAGAIN;  in nfs4_set_delegation()
5580 	if (fp->fi_had_conflict)  in nfs4_set_delegation()
5584 	spin_lock(&fp->fi_lock);  in nfs4_set_delegation()
5586 	spin_unlock(&fp->fi_lock);  in nfs4_set_delegation()
5594 	vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp);  in nfs4_set_delegation()
5596 	put_clnt_odstate(dp->dl_clnt_odstate);  in nfs4_set_delegation()
5597 	nfs4_put_stid(&dp->dl_stid);  in nfs4_set_delegation()
5605 	open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_open_deleg_none_ext()
5606 	if (status == -EAGAIN)  in nfsd4_open_deleg_none_ext()
5607 		open->op_why_no_deleg = WND4_CONTENTION;  in nfsd4_open_deleg_none_ext()
5609 		open->op_why_no_deleg = WND4_RESOURCE;  in nfsd4_open_deleg_none_ext()
5610 		switch (open->op_deleg_want) {  in nfsd4_open_deleg_none_ext()
5616 			open->op_why_no_deleg = WND4_CANCELLED;  in nfsd4_open_deleg_none_ext()
5653 	struct nfs4_openowner *oo = openowner(stp->st_stateowner);  in nfs4_open_delegation()
5654 	struct nfs4_client *clp = stp->st_stid.sc_client;  in nfs4_open_delegation()
5659 	cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);  in nfs4_open_delegation()
5660 	open->op_recall = 0;  in nfs4_open_delegation()
5661 	switch (open->op_claim_type) {  in nfs4_open_delegation()
5664 				open->op_recall = 1;  in nfs4_open_delegation()
5675 			if (locks_in_grace(clp->net))  in nfs4_open_delegation()
5677 			if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))  in nfs4_open_delegation()
5679 			if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE &&  in nfs4_open_delegation()
5680 					!clp->cl_minorversion)  in nfs4_open_delegation()
5690 	memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));  in nfs4_open_delegation()
5692 	if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) {  in nfs4_open_delegation()
5693 		open->op_delegate_type = NFS4_OPEN_DELEGATE_WRITE;  in nfs4_open_delegation()
5694 		trace_nfsd_deleg_write(&dp->dl_stid.sc_stateid);  in nfs4_open_delegation()
5696 		open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;  in nfs4_open_delegation()
5697 		trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);  in nfs4_open_delegation()
5699 	nfs4_put_stid(&dp->dl_stid);  in nfs4_open_delegation()
5702 	open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;  in nfs4_open_delegation()
5703 	if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&  in nfs4_open_delegation()
5704 	    open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {  in nfs4_open_delegation()
5706 		open->op_recall = 1;  in nfs4_open_delegation()
5710 	if (open->op_deleg_want)  in nfs4_open_delegation()
5718 	if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&  in nfsd4_deleg_xgrade_none_ext()
5719 	    dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {  in nfsd4_deleg_xgrade_none_ext()
5720 		open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_deleg_xgrade_none_ext()
5721 		open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;  in nfsd4_deleg_xgrade_none_ext()
5722 	} else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&  in nfsd4_deleg_xgrade_none_ext()
5723 		   dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {  in nfsd4_deleg_xgrade_none_ext()
5724 		open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_deleg_xgrade_none_ext()
5725 		open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;  in nfsd4_deleg_xgrade_none_ext()
5734  * nfsd4_process_open2 - finish open processing
5739  * If successful, (1) truncate the file if open->op_truncate was
5740  * set, (2) set open->op_stateid, (3) set open->op_delegation.
5748 	struct nfsd4_compoundres *resp = rqstp->rq_resp;  in nfsd4_process_open2()
5749 	struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;  in nfsd4_process_open2()
5761 	fp = nfsd4_file_hash_insert(open->op_file, current_fh);  in nfsd4_process_open2()
5764 	if (fp != open->op_file) {  in nfsd4_process_open2()
5770 		open->op_file = NULL;  in nfsd4_process_open2()
5783 		if (!open->op_stp)  in nfsd4_process_open2()
5797 			mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5803 			stp->st_stid.sc_type = NFS4_CLOSED_STID;  in nfsd4_process_open2()
5805 			mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5809 		stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,  in nfsd4_process_open2()
5810 							open->op_odstate);  in nfsd4_process_open2()
5811 		if (stp->st_clnt_odstate == open->op_odstate)  in nfsd4_process_open2()
5812 			open->op_odstate = NULL;  in nfsd4_process_open2()
5815 	nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);  in nfsd4_process_open2()
5816 	mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5818 	if (nfsd4_has_session(&resp->cstate)) {  in nfsd4_process_open2()
5819 		if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {  in nfsd4_process_open2()
5820 			open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_process_open2()
5821 			open->op_why_no_deleg = WND4_NOT_WANTED;  in nfsd4_process_open2()
5830 	nfs4_open_delegation(open, stp, &resp->cstate.current_fh);  in nfsd4_process_open2()
5833 	trace_nfsd_open(&stp->st_stid.sc_stateid);  in nfsd4_process_open2()
5836 	if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&  in nfsd4_process_open2()
5837 	    open->op_deleg_want)  in nfsd4_process_open2()
5842 	if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)  in nfsd4_process_open2()
5843 		open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;  in nfsd4_process_open2()
5847 	open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;  in nfsd4_process_open2()
5848 	if (nfsd4_has_session(&resp->cstate))  in nfsd4_process_open2()
5849 		open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;  in nfsd4_process_open2()
5850 	else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))  in nfsd4_process_open2()
5851 		open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;  in nfsd4_process_open2()
5854 		nfs4_put_stid(&dp->dl_stid);  in nfsd4_process_open2()
5856 		nfs4_put_stid(&stp->st_stid);  in nfsd4_process_open2()
5864 	if (open->op_openowner) {  in nfsd4_cleanup_open_state()
5865 		struct nfs4_stateowner *so = &open->op_openowner->oo_owner;  in nfsd4_cleanup_open_state()
5870 	if (open->op_file)  in nfsd4_cleanup_open_state()
5871 		kmem_cache_free(file_slab, open->op_file);  in nfsd4_cleanup_open_state()
5872 	if (open->op_stp)  in nfsd4_cleanup_open_state()
5873 		nfs4_put_stid(&open->op_stp->st_stid);  in nfsd4_cleanup_open_state()
5874 	if (open->op_odstate)  in nfsd4_cleanup_open_state()
5875 		kmem_cache_free(odstate_slab, open->op_odstate);  in nfsd4_cleanup_open_state()
5882 	clientid_t *clid = &u->renew;  in nfsd4_renew()
5891 	clp = cstate->clp;  in nfsd4_renew()
5892 	if (!list_empty(&clp->cl_delegations)  in nfsd4_renew()
5893 			&& clp->cl_cb_state != NFSD4_CB_UP)  in nfsd4_renew()
5902 	if (nn->grace_ended)  in nfsd4_end_grace()
5906 	nn->grace_ended = true;  in nfsd4_end_grace()
5923 	locks_end_grace(&nn->nfsd4_manager);  in nfsd4_end_grace()
5937 	time64_t double_grace_period_end = nn->boot_time +  in clients_still_reclaiming()
5938 					   2 * nn->nfsd4_lease;  in clients_still_reclaiming()
5940 	if (nn->track_reclaim_completes &&  in clients_still_reclaiming()
5941 			atomic_read(&nn->nr_reclaim_complete) ==  in clients_still_reclaiming()
5942 			nn->reclaim_str_hashtbl_size)  in clients_still_reclaiming()
5944 	if (!nn->somebody_reclaimed)  in clients_still_reclaiming()
5946 	nn->somebody_reclaimed = false;  in clients_still_reclaiming()
5965 	if (last_refresh < lt->cutoff)  in state_expired()
5967 	time_remaining = last_refresh - lt->cutoff;  in state_expired()
5968 	lt->new_timeo = min(lt->new_timeo, time_remaining);  in state_expired()
5975 	spin_lock_init(&nn->nfsd_ssc_lock);  in nfsd4_ssc_init_umount_work()
5976 	INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list);  in nfsd4_ssc_init_umount_work()
5977 	init_waitqueue_head(&nn->nfsd_ssc_waitq);  in nfsd4_ssc_init_umount_work()
5990 	spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5991 	list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {  in nfsd4_ssc_shutdown_umount()
5992 		list_del(&ni->nsui_list);  in nfsd4_ssc_shutdown_umount()
5993 		spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5994 		mntput(ni->nsui_vfsmount);  in nfsd4_ssc_shutdown_umount()
5996 		spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
5998 	spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_shutdown_umount()
6007 	spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6008 	list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {  in nfsd4_ssc_expire_umount()
6009 		if (time_after(jiffies, ni->nsui_expire)) {  in nfsd4_ssc_expire_umount()
6010 			if (refcount_read(&ni->nsui_refcnt) > 1)  in nfsd4_ssc_expire_umount()
6014 			ni->nsui_busy = true;  in nfsd4_ssc_expire_umount()
6015 			spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6016 			mntput(ni->nsui_vfsmount);  in nfsd4_ssc_expire_umount()
6017 			spin_lock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6020 			list_del(&ni->nsui_list);  in nfsd4_ssc_expire_umount()
6030 		wake_up_all(&nn->nfsd_ssc_waitq);  in nfsd4_ssc_expire_umount()
6031 	spin_unlock(&nn->nfsd_ssc_lock);  in nfsd4_ssc_expire_umount()
6043 	list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {  in nfs4_lockowner_has_blockers()
6044 		nf = stp->st_stid.sc_file;  in nfs4_lockowner_has_blockers()
6045 		ctx = locks_inode_context(nf->fi_inode);  in nfs4_lockowner_has_blockers()
6061 	if (atomic_read(&clp->cl_delegs_in_recall))  in nfs4_anylock_blockers()
6063 	spin_lock(&clp->cl_lock);  in nfs4_anylock_blockers()
6065 		list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i],  in nfs4_anylock_blockers()
6067 			if (so->so_is_open_owner)  in nfs4_anylock_blockers()
6071 				spin_unlock(&clp->cl_lock);  in nfs4_anylock_blockers()
6076 	spin_unlock(&clp->cl_lock);  in nfs4_anylock_blockers()
6088 	maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ?  in nfs4_get_client_reaplist()
6091 	spin_lock(&nn->client_lock);  in nfs4_get_client_reaplist()
6092 	list_for_each_safe(pos, next, &nn->client_lru) {  in nfs4_get_client_reaplist()
6094 		if (clp->cl_state == NFSD4_EXPIRABLE)  in nfs4_get_client_reaplist()
6096 		if (!state_expired(lt, clp->cl_time))  in nfs4_get_client_reaplist()
6098 		if (!atomic_read(&clp->cl_rpc_users)) {  in nfs4_get_client_reaplist()
6099 			if (clp->cl_state == NFSD4_ACTIVE)  in nfs4_get_client_reaplist()
6100 				atomic_inc(&nn->nfsd_courtesy_clients);  in nfs4_get_client_reaplist()
6101 			clp->cl_state = NFSD4_COURTESY;  in nfs4_get_client_reaplist()
6110 			list_add(&clp->cl_lru, reaplist);  in nfs4_get_client_reaplist()
6114 	spin_unlock(&nn->client_lock);  in nfs4_get_client_reaplist()
6128 	spin_lock(&nn->client_lock);  in nfs4_get_courtesy_client_reaplist()
6129 	list_for_each_safe(pos, next, &nn->client_lru) {  in nfs4_get_courtesy_client_reaplist()
6131 		if (clp->cl_state == NFSD4_ACTIVE)  in nfs4_get_courtesy_client_reaplist()
6136 			list_add(&clp->cl_lru, reaplist);  in nfs4_get_courtesy_client_reaplist()
6140 	spin_unlock(&nn->client_lock);  in nfs4_get_courtesy_client_reaplist()
6151 		trace_nfsd_clid_purged(&clp->cl_clientid);  in nfs4_process_client_reaplist()
6152 		list_del_init(&clp->cl_lru);  in nfs4_process_client_reaplist()
6166 		.cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease,  in nfs4_laundromat()
6167 		.new_timeo = nn->nfsd4_lease  in nfs4_laundromat()
6179 	spin_lock(&nn->s2s_cp_lock);  in nfs4_laundromat()
6180 	idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {  in nfs4_laundromat()
6182 		if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID &&  in nfs4_laundromat()
6183 				state_expired(&lt, cps->cpntf_time))  in nfs4_laundromat()
6186 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_laundromat()
6191 	list_for_each_safe(pos, next, &nn->del_recall_lru) {  in nfs4_laundromat()
6193 		if (!state_expired(&lt, dp->dl_time))  in nfs4_laundromat()
6196 		list_add(&dp->dl_recall_lru, &reaplist);  in nfs4_laundromat()
6202 		list_del_init(&dp->dl_recall_lru);  in nfs4_laundromat()
6206 	spin_lock(&nn->client_lock);  in nfs4_laundromat()
6207 	while (!list_empty(&nn->close_lru)) {  in nfs4_laundromat()
6208 		oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,  in nfs4_laundromat()
6210 		if (!state_expired(&lt, oo->oo_time))  in nfs4_laundromat()
6212 		list_del_init(&oo->oo_close_lru);  in nfs4_laundromat()
6213 		stp = oo->oo_last_closed_stid;  in nfs4_laundromat()
6214 		oo->oo_last_closed_stid = NULL;  in nfs4_laundromat()
6215 		spin_unlock(&nn->client_lock);  in nfs4_laundromat()
6216 		nfs4_put_stid(&stp->st_stid);  in nfs4_laundromat()
6217 		spin_lock(&nn->client_lock);  in nfs4_laundromat()
6219 	spin_unlock(&nn->client_lock);  in nfs4_laundromat()
6224 	 * So, we clean out any un-revisited request after a lease period  in nfs4_laundromat()
6233 	spin_lock(&nn->blocked_locks_lock);  in nfs4_laundromat()
6234 	while (!list_empty(&nn->blocked_locks_lru)) {  in nfs4_laundromat()
6235 		nbl = list_first_entry(&nn->blocked_locks_lru,  in nfs4_laundromat()
6237 		if (!state_expired(&lt, nbl->nbl_time))  in nfs4_laundromat()
6239 		list_move(&nbl->nbl_lru, &reaplist);  in nfs4_laundromat()
6240 		list_del_init(&nbl->nbl_list);  in nfs4_laundromat()
6242 	spin_unlock(&nn->blocked_locks_lock);  in nfs4_laundromat()
6247 		list_del_init(&nbl->nbl_lru);  in nfs4_laundromat()
6251 	/* service the server-to-server copy delayed unmount list */  in nfs4_laundromat()
6269 	queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);  in laundromat_main()
6289 	spin_lock(&nn->client_lock);  in deleg_reaper()
6290 	list_for_each_safe(pos, next, &nn->client_lru) {  in deleg_reaper()
6293 		if (clp->cl_state != NFSD4_ACTIVE)  in deleg_reaper()
6295 		if (list_empty(&clp->cl_delegations))  in deleg_reaper()
6297 		if (atomic_read(&clp->cl_delegs_in_recall))  in deleg_reaper()
6299 		if (test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags))  in deleg_reaper()
6301 		if (ktime_get_boottime_seconds() - clp->cl_ra_time < 5)  in deleg_reaper()
6303 		if (clp->cl_cb_state != NFSD4_CB_UP)  in deleg_reaper()
6305 		list_add(&clp->cl_ra_cblist, &cblist);  in deleg_reaper()
6308 		kref_get(&clp->cl_nfsdfs.cl_ref);  in deleg_reaper()
6309 		set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);  in deleg_reaper()
6310 		clp->cl_ra_time = ktime_get_boottime_seconds();  in deleg_reaper()
6312 	spin_unlock(&nn->client_lock);  in deleg_reaper()
6317 		list_del_init(&clp->cl_ra_cblist);  in deleg_reaper()
6318 		clp->cl_ra->ra_keep = 0;  in deleg_reaper()
6319 		clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG);  in deleg_reaper()
6320 		trace_nfsd_cb_recall_any(clp->cl_ra);  in deleg_reaper()
6321 		nfsd4_run_cb(&clp->cl_ra->ra_cb);  in deleg_reaper()
6337 	if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))  in nfs4_check_fh()
6348 	if (stp->st_openstp)  in nfs4_check_openmode()
6349 		stp = stp->st_openstp;  in nfs4_check_openmode()
6382 	if (has_session && in->si_generation == 0)  in check_stateid_generation()
6385 	if (in->si_generation == ref->si_generation)  in check_stateid_generation()
6393 	 * non-buggy client.  For example, if the client sends a lock  in check_stateid_generation()
6408 	spin_lock(&s->sc_lock);  in nfsd4_stid_check_stateid_generation()
6411 		ret = check_stateid_generation(in, &s->sc_stateid, has_session);  in nfsd4_stid_check_stateid_generation()
6412 	spin_unlock(&s->sc_lock);  in nfsd4_stid_check_stateid_generation()
6418 	if (ols->st_stateowner->so_is_open_owner &&  in nfsd4_check_openowner_confirmed()
6419 	    !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))  in nfsd4_check_openowner_confirmed()
6432 	spin_lock(&cl->cl_lock);  in nfsd4_validate_stateid()
6439 	switch (s->sc_type) {  in nfsd4_validate_stateid()
6451 		printk("unknown stateid type %x\n", s->sc_type);  in nfsd4_validate_stateid()
6458 	spin_unlock(&cl->cl_lock);  in nfsd4_validate_stateid()
6483 	status = set_client(&stateid->si_opaque.so_clid, cstate, nn);  in nfsd4_lookup_stateid()
6485 		if (cstate->session)  in nfsd4_lookup_stateid()
6491 	stid = find_stateid_by_type(cstate->clp, stateid, typemask);  in nfsd4_lookup_stateid()
6494 	if ((stid->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {  in nfsd4_lookup_stateid()
6496 		if (cstate->minorversion)  in nfsd4_lookup_stateid()
6512 	switch (s->sc_type) {  in nfs4_find_file()
6514 		spin_lock(&s->sc_file->fi_lock);  in nfs4_find_file()
6515 		ret = nfsd_file_get(s->sc_file->fi_deleg_file);  in nfs4_find_file()
6516 		spin_unlock(&s->sc_file->fi_lock);  in nfs4_find_file()
6521 			ret = find_readable_file(s->sc_file);  in nfs4_find_file()
6523 			ret = find_writeable_file(s->sc_file);  in nfs4_find_file()
6550 		status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,  in nfs4_check_file()
6568 	WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID);  in _free_cpntf_state_locked()
6569 	if (!refcount_dec_and_test(&cps->cp_stateid.cs_count))  in _free_cpntf_state_locked()
6571 	list_del(&cps->cp_list);  in _free_cpntf_state_locked()
6572 	idr_remove(&nn->s2s_cp_stateids,  in _free_cpntf_state_locked()
6573 		   cps->cp_stateid.cs_stid.si_opaque.so_id);  in _free_cpntf_state_locked()
6588 	if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id)  in manage_cpntf_state()
6590 	spin_lock(&nn->s2s_cp_lock);  in manage_cpntf_state()
6591 	cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id);  in manage_cpntf_state()
6595 		if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) {  in manage_cpntf_state()
6600 			refcount_inc(&state->cp_stateid.cs_count);  in manage_cpntf_state()
6605 	spin_unlock(&nn->s2s_cp_lock);  in manage_cpntf_state()
6624 	cps->cpntf_time = ktime_get_boottime_seconds();  in find_cpntf_state()
6627 	found = lookup_clientid(&cps->cp_p_clid, true, nn);  in find_cpntf_state()
6631 	*stid = find_stateid_by_type(found, &cps->cp_p_stateid,  in find_cpntf_state()
6646 	spin_lock(&nn->s2s_cp_lock);  in nfs4_put_cpntf_state()
6648 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_put_cpntf_state()
6652  * nfs4_preprocess_stateid_op - find and prep stateid for an operation
6700 	switch (s->sc_type) {  in nfs4_preprocess_stateid_op()
6736 	struct nfsd4_test_stateid *test_stateid = &u->test_stateid;  in nfsd4_test_stateid()
6738 	struct nfs4_client *cl = cstate->clp;  in nfsd4_test_stateid()
6740 	list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)  in nfsd4_test_stateid()
6741 		stateid->ts_id_status =  in nfsd4_test_stateid()
6742 			nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);  in nfsd4_test_stateid()
6757 	ret = check_stateid_generation(stateid, &s->sc_stateid, 1);  in nfsd4_free_lock_stateid()
6762 	if (check_for_locks(stp->st_stid.sc_file,  in nfsd4_free_lock_stateid()
6763 			    lockowner(stp->st_stateowner)))  in nfsd4_free_lock_stateid()
6770 	mutex_unlock(&stp->st_mutex);  in nfsd4_free_lock_stateid()
6780 	struct nfsd4_free_stateid *free_stateid = &u->free_stateid;  in nfsd4_free_stateid()
6781 	stateid_t *stateid = &free_stateid->fr_stateid;  in nfsd4_free_stateid()
6784 	struct nfs4_client *cl = cstate->clp;  in nfsd4_free_stateid()
6787 	spin_lock(&cl->cl_lock);  in nfsd4_free_stateid()
6791 	spin_lock(&s->sc_lock);  in nfsd4_free_stateid()
6792 	switch (s->sc_type) {  in nfsd4_free_stateid()
6797 		ret = check_stateid_generation(stateid, &s->sc_stateid, 1);  in nfsd4_free_stateid()
6803 		spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6804 		refcount_inc(&s->sc_count);  in nfsd4_free_stateid()
6805 		spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6809 		spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6811 		list_del_init(&dp->dl_recall_lru);  in nfsd4_free_stateid()
6812 		spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6818 	spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6820 	spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6834 	struct svc_fh *current_fh = &cstate->current_fh;  in nfs4_seqid_op_checks()
6835 	struct nfs4_stateowner *sop = stp->st_stateowner;  in nfs4_seqid_op_checks()
6844 	status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));  in nfs4_seqid_op_checks()
6846 		status = nfs4_check_fh(current_fh, &stp->st_stid);  in nfs4_seqid_op_checks()
6848 		mutex_unlock(&stp->st_mutex);  in nfs4_seqid_op_checks()
6853  * nfs4_preprocess_seqid_op - find and prep an ol_stateid for a seqid-morphing op
6882 	nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);  in nfs4_preprocess_seqid_op()
6888 		nfs4_put_stid(&stp->st_stid);  in nfs4_preprocess_seqid_op()
6903 	oo = openowner(stp->st_stateowner);  in nfs4_preprocess_confirmed_seqid_op()
6904 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {  in nfs4_preprocess_confirmed_seqid_op()
6905 		mutex_unlock(&stp->st_mutex);  in nfs4_preprocess_confirmed_seqid_op()
6906 		nfs4_put_stid(&stp->st_stid);  in nfs4_preprocess_confirmed_seqid_op()
6917 	struct nfsd4_open_confirm *oc = &u->open_confirm;  in nfsd4_open_confirm()
6924 			cstate->current_fh.fh_dentry);  in nfsd4_open_confirm()
6926 	status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);  in nfsd4_open_confirm()
6931 					oc->oc_seqid, &oc->oc_req_stateid,  in nfsd4_open_confirm()
6935 	oo = openowner(stp->st_stateowner);  in nfsd4_open_confirm()
6937 	if (oo->oo_flags & NFS4_OO_CONFIRMED) {  in nfsd4_open_confirm()
6938 		mutex_unlock(&stp->st_mutex);  in nfsd4_open_confirm()
6941 	oo->oo_flags |= NFS4_OO_CONFIRMED;  in nfsd4_open_confirm()
6942 	nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);  in nfsd4_open_confirm()
6943 	mutex_unlock(&stp->st_mutex);  in nfsd4_open_confirm()
6944 	trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid);  in nfsd4_open_confirm()
6945 	nfsd4_client_record_create(oo->oo_owner.so_client);  in nfsd4_open_confirm()
6948 	nfs4_put_stid(&stp->st_stid);  in nfsd4_open_confirm()
6958 	nfs4_file_put_access(stp->st_stid.sc_file, access);  in nfs4_stateid_downgrade_bit()
6984 	struct nfsd4_open_downgrade *od = &u->open_downgrade;  in nfsd4_open_downgrade()
6990 			cstate->current_fh.fh_dentry);  in nfsd4_open_downgrade()
6993 	if (od->od_deleg_want)  in nfsd4_open_downgrade()
6995 			od->od_deleg_want);  in nfsd4_open_downgrade()
6997 	status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,  in nfsd4_open_downgrade()
6998 					&od->od_stateid, &stp, nn);  in nfsd4_open_downgrade()
7002 	if (!test_access(od->od_share_access, stp)) {  in nfsd4_open_downgrade()
7004 			stp->st_access_bmap, od->od_share_access);  in nfsd4_open_downgrade()
7007 	if (!test_deny(od->od_share_deny, stp)) {  in nfsd4_open_downgrade()
7009 			stp->st_deny_bmap, od->od_share_deny);  in nfsd4_open_downgrade()
7012 	nfs4_stateid_downgrade(stp, od->od_share_access);  in nfsd4_open_downgrade()
7013 	reset_union_bmap_deny(od->od_share_deny, stp);  in nfsd4_open_downgrade()
7014 	nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);  in nfsd4_open_downgrade()
7017 	mutex_unlock(&stp->st_mutex);  in nfsd4_open_downgrade()
7018 	nfs4_put_stid(&stp->st_stid);  in nfsd4_open_downgrade()
7026 	struct nfs4_client *clp = s->st_stid.sc_client;  in nfsd4_close_open_stateid()
7031 	spin_lock(&clp->cl_lock);  in nfsd4_close_open_stateid()
7034 	if (clp->cl_minorversion) {  in nfsd4_close_open_stateid()
7037 		spin_unlock(&clp->cl_lock);  in nfsd4_close_open_stateid()
7039 			nfs4_free_cpntf_statelist(clp->net, &stp->st_stid);  in nfsd4_close_open_stateid()
7042 		spin_unlock(&clp->cl_lock);  in nfsd4_close_open_stateid()
7045 			move_to_close_lru(s, clp->net);  in nfsd4_close_open_stateid()
7056 	struct nfsd4_close *close = &u->close;  in nfsd4_close()
7063 			cstate->current_fh.fh_dentry);  in nfsd4_close()
7065 	status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,  in nfsd4_close()
7066 					&close->cl_stateid,  in nfsd4_close()
7073 	stp->st_stid.sc_type = NFS4_CLOSED_STID;  in nfsd4_close()
7081 	nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);  in nfsd4_close()
7084 	mutex_unlock(&stp->st_mutex);  in nfsd4_close()
7093 	memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid));  in nfsd4_close()
7096 	nfs4_put_stid(&stp->st_stid);  in nfsd4_close()
7105 	struct nfsd4_delegreturn *dr = &u->delegreturn;  in nfsd4_delegreturn()
7107 	stateid_t *stateid = &dr->dr_stateid;  in nfsd4_delegreturn()
7112 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))  in nfsd4_delegreturn()
7119 	status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate));  in nfsd4_delegreturn()
7124 	wake_up_var(d_inode(cstate->current_fh.fh_dentry));  in nfsd4_delegreturn()
7127 	nfs4_put_stid(&dp->dl_stid);  in nfsd4_delegreturn()
7140 	return end > start ? end - 1: NFS4_MAX_UINT64;  in last_byte_offset()
7144  * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
7145  * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
7146  * byte, because of sign extension problems.  Since NFSv4 calls for 64-bit
7147  * locking, this prevents us from being completely protocol-compliant.  The
7154 	if (lock->fl_start < 0)  in nfs4_transform_lock_offset()
7155 		lock->fl_start = OFFSET_MAX;  in nfs4_transform_lock_offset()
7156 	if (lock->fl_end < 0)  in nfs4_transform_lock_offset()
7157 		lock->fl_end = OFFSET_MAX;  in nfs4_transform_lock_offset()
7165 	nfs4_get_stateowner(&lo->lo_owner);  in nfsd4_lm_get_owner()
7175 		nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_lm_put_owner()
7182 	struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner;  in nfsd4_lm_lock_expirable()
7183 	struct nfs4_client *clp = lo->lo_owner.so_client;  in nfsd4_lm_lock_expirable()
7187 		nn = net_generic(clp->net, nfsd_net_id);  in nfsd4_lm_lock_expirable()
7188 		mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);  in nfsd4_lm_lock_expirable()
7204 	struct nfs4_lockowner		*lo = (struct nfs4_lockowner *)fl->fl_owner;  in nfsd4_lm_notify()
7205 	struct net			*net = lo->lo_owner.so_client->net;  in nfsd4_lm_notify()
7212 	spin_lock(&nn->blocked_locks_lock);  in nfsd4_lm_notify()
7213 	if (!list_empty(&nbl->nbl_list)) {  in nfsd4_lm_notify()
7214 		list_del_init(&nbl->nbl_list);  in nfsd4_lm_notify()
7215 		list_del_init(&nbl->nbl_lru);  in nfsd4_lm_notify()
7218 	spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lm_notify()
7222 		nfsd4_run_cb(&nbl->nbl_cb);  in nfsd4_lm_notify()
7240 	if (fl->fl_lmops == &nfsd_posix_mng_ops) {  in nfs4_set_lock_denied()
7241 		lo = (struct nfs4_lockowner *) fl->fl_owner;  in nfs4_set_lock_denied()
7242 		xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,  in nfs4_set_lock_denied()
7244 		if (!deny->ld_owner.data)  in nfs4_set_lock_denied()
7247 		deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;  in nfs4_set_lock_denied()
7250 		deny->ld_owner.len = 0;  in nfs4_set_lock_denied()
7251 		deny->ld_owner.data = NULL;  in nfs4_set_lock_denied()
7252 		deny->ld_clientid.cl_boot = 0;  in nfs4_set_lock_denied()
7253 		deny->ld_clientid.cl_id = 0;  in nfs4_set_lock_denied()
7255 	deny->ld_start = fl->fl_start;  in nfs4_set_lock_denied()
7256 	deny->ld_length = NFS4_MAX_UINT64;  in nfs4_set_lock_denied()
7257 	if (fl->fl_end != NFS4_MAX_UINT64)  in nfs4_set_lock_denied()
7258 		deny->ld_length = fl->fl_end - fl->fl_start + 1;          in nfs4_set_lock_denied()
7259 	deny->ld_type = NFS4_READ_LT;  in nfs4_set_lock_denied()
7260 	if (fl->fl_type != F_RDLCK)  in nfs4_set_lock_denied()
7261 		deny->ld_type = NFS4_WRITE_LT;  in nfs4_set_lock_denied()
7270 	lockdep_assert_held(&clp->cl_lock);  in find_lockowner_str_locked()
7272 	list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],  in find_lockowner_str_locked()
7274 		if (so->so_is_open_owner)  in find_lockowner_str_locked()
7287 	spin_lock(&clp->cl_lock);  in find_lockowner_str()
7289 	spin_unlock(&clp->cl_lock);  in find_lockowner_str()
7312  * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 
7324 	lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);  in alloc_init_lock_stateowner()
7327 	INIT_LIST_HEAD(&lo->lo_blocked);  in alloc_init_lock_stateowner()
7328 	INIT_LIST_HEAD(&lo->lo_owner.so_stateids);  in alloc_init_lock_stateowner()
7329 	lo->lo_owner.so_is_open_owner = 0;  in alloc_init_lock_stateowner()
7330 	lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;  in alloc_init_lock_stateowner()
7331 	lo->lo_owner.so_ops = &lockowner_ops;  in alloc_init_lock_stateowner()
7332 	spin_lock(&clp->cl_lock);  in alloc_init_lock_stateowner()
7333 	ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);  in alloc_init_lock_stateowner()
7335 		list_add(&lo->lo_owner.so_strhash,  in alloc_init_lock_stateowner()
7336 			 &clp->cl_ownerstr_hashtbl[strhashval]);  in alloc_init_lock_stateowner()
7339 		nfs4_free_stateowner(&lo->lo_owner);  in alloc_init_lock_stateowner()
7341 	spin_unlock(&clp->cl_lock);  in alloc_init_lock_stateowner()
7351 	lockdep_assert_held(&ost->st_stid.sc_client->cl_lock);  in find_lock_stateid()
7353 	/* If ost is not hashed, ost->st_locks will not be valid */  in find_lock_stateid()
7355 		list_for_each_entry(lst, &ost->st_locks, st_locks) {  in find_lock_stateid()
7356 			if (lst->st_stateowner == &lo->lo_owner) {  in find_lock_stateid()
7357 				refcount_inc(&lst->st_stid.sc_count);  in find_lock_stateid()
7369 	struct nfs4_client *clp = lo->lo_owner.so_client;  in init_lock_stateid()
7372 	mutex_init(&stp->st_mutex);  in init_lock_stateid()
7373 	mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);  in init_lock_stateid()
7375 	spin_lock(&clp->cl_lock);  in init_lock_stateid()
7381 	refcount_inc(&stp->st_stid.sc_count);  in init_lock_stateid()
7382 	stp->st_stid.sc_type = NFS4_LOCK_STID;  in init_lock_stateid()
7383 	stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);  in init_lock_stateid()
7385 	stp->st_stid.sc_file = fp;  in init_lock_stateid()
7386 	stp->st_access_bmap = 0;  in init_lock_stateid()
7387 	stp->st_deny_bmap = open_stp->st_deny_bmap;  in init_lock_stateid()
7388 	stp->st_openstp = open_stp;  in init_lock_stateid()
7389 	spin_lock(&fp->fi_lock);  in init_lock_stateid()
7390 	list_add(&stp->st_locks, &open_stp->st_locks);  in init_lock_stateid()
7391 	list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);  in init_lock_stateid()
7392 	list_add(&stp->st_perfile, &fp->fi_stateids);  in init_lock_stateid()
7393 	spin_unlock(&fp->fi_lock);  in init_lock_stateid()
7394 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
7397 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
7399 		nfs4_put_stid(&retstp->st_stid);  in init_lock_stateid()
7403 	mutex_unlock(&stp->st_mutex);  in init_lock_stateid()
7406 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
7407 	mutex_unlock(&stp->st_mutex);  in init_lock_stateid()
7418 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);  in find_or_create_lock_stateid()
7419 	struct nfs4_client *clp = oo->oo_owner.so_client;  in find_or_create_lock_stateid()
7422 	spin_lock(&clp->cl_lock);  in find_or_create_lock_stateid()
7424 	spin_unlock(&clp->cl_lock);  in find_or_create_lock_stateid()
7428 		nfs4_put_stid(&lst->st_stid);  in find_or_create_lock_stateid()
7452 	struct nfs4_file *fp = lock_stp->st_stid.sc_file;  in get_lock_access()
7454 	lockdep_assert_held(&fp->fi_lock);  in get_lock_access()
7469 	struct nfs4_file *fi = ost->st_stid.sc_file;  in lookup_or_create_lock_state()
7470 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);  in lookup_or_create_lock_state()
7471 	struct nfs4_client *cl = oo->oo_owner.so_client;  in lookup_or_create_lock_state()
7472 	struct inode *inode = d_inode(cstate->current_fh.fh_dentry);  in lookup_or_create_lock_state()
7477 	lo = find_lockowner_str(cl, &lock->lk_new_owner);  in lookup_or_create_lock_state()
7479 		strhashval = ownerstr_hashval(&lock->lk_new_owner);  in lookup_or_create_lock_state()
7486 		if (!cstate->minorversion &&  in lookup_or_create_lock_state()
7487 		    lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)  in lookup_or_create_lock_state()
7500 	nfs4_put_stateowner(&lo->lo_owner);  in lookup_or_create_lock_state()
7511 	struct nfsd4_lock *lock = &u->lock;  in nfsd4_lock()
7531 		(long long) lock->lk_offset,  in nfsd4_lock()
7532 		(long long) lock->lk_length);  in nfsd4_lock()
7534 	if (check_lock_length(lock->lk_offset, lock->lk_length))  in nfsd4_lock()
7537 	if ((status = fh_verify(rqstp, &cstate->current_fh,  in nfsd4_lock()
7543 	if (lock->lk_is_new) {  in nfsd4_lock()
7546 			memcpy(&lock->lk_new_clientid,  in nfsd4_lock()
7547 				&cstate->clp->cl_clientid,  in nfsd4_lock()
7552 				        lock->lk_new_open_seqid,  in nfsd4_lock()
7553 		                        &lock->lk_new_open_stateid,  in nfsd4_lock()
7557 		mutex_unlock(&open_stp->st_mutex);  in nfsd4_lock()
7558 		open_sop = openowner(open_stp->st_stateowner);  in nfsd4_lock()
7560 		if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,  in nfsd4_lock()
7561 						&lock->lk_new_clientid))  in nfsd4_lock()
7567 				       lock->lk_old_lock_seqid,  in nfsd4_lock()
7568 				       &lock->lk_old_lock_stateid,  in nfsd4_lock()
7573 	lock_sop = lockowner(lock_stp->st_stateowner);  in nfsd4_lock()
7575 	lkflg = setlkflg(lock->lk_type);  in nfsd4_lock()
7581 	if (locks_in_grace(net) && !lock->lk_reclaim)  in nfsd4_lock()
7584 	if (!locks_in_grace(net) && lock->lk_reclaim)  in nfsd4_lock()
7587 	if (lock->lk_reclaim)  in nfsd4_lock()
7590 	fp = lock_stp->st_stid.sc_file;  in nfsd4_lock()
7591 	switch (lock->lk_type) {  in nfsd4_lock()
7597 			spin_lock(&fp->fi_lock);  in nfsd4_lock()
7601 			spin_unlock(&fp->fi_lock);  in nfsd4_lock()
7609 			spin_lock(&fp->fi_lock);  in nfsd4_lock()
7613 			spin_unlock(&fp->fi_lock);  in nfsd4_lock()
7627 	 * Most filesystems with their own ->lock operations will block  in nfsd4_lock()
7633 	if (nf->nf_file->f_op->lock)  in nfsd4_lock()
7636 	nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);  in nfsd4_lock()
7643 	file_lock = &nbl->nbl_lock;  in nfsd4_lock()
7644 	file_lock->fl_type = fl_type;  in nfsd4_lock()
7645 	file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));  in nfsd4_lock()
7646 	file_lock->fl_pid = current->tgid;  in nfsd4_lock()
7647 	file_lock->fl_file = nf->nf_file;  in nfsd4_lock()
7648 	file_lock->fl_flags = fl_flags;  in nfsd4_lock()
7649 	file_lock->fl_lmops = &nfsd_posix_mng_ops;  in nfsd4_lock()
7650 	file_lock->fl_start = lock->lk_offset;  in nfsd4_lock()
7651 	file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);  in nfsd4_lock()
7662 		nbl->nbl_time = ktime_get_boottime_seconds();  in nfsd4_lock()
7663 		spin_lock(&nn->blocked_locks_lock);  in nfsd4_lock()
7664 		list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);  in nfsd4_lock()
7665 		list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);  in nfsd4_lock()
7666 		kref_get(&nbl->nbl_kref);  in nfsd4_lock()
7667 		spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lock()
7670 	err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock);  in nfsd4_lock()
7673 		nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);  in nfsd4_lock()
7675 		if (lock->lk_reclaim)  in nfsd4_lock()
7676 			nn->somebody_reclaimed = true;  in nfsd4_lock()
7679 		kref_put(&nbl->nbl_kref, free_nbl);  in nfsd4_lock()
7682 	case -EAGAIN:		/* conflock holds conflicting lock */  in nfsd4_lock()
7685 		nfs4_set_lock_denied(conflock, &lock->lk_denied);  in nfsd4_lock()
7687 	case -EDEADLK:  in nfsd4_lock()
7699 			spin_lock(&nn->blocked_locks_lock);  in nfsd4_lock()
7700 			if (!list_empty(&nbl->nbl_list) &&  in nfsd4_lock()
7701 			    !list_empty(&nbl->nbl_lru)) {  in nfsd4_lock()
7702 				list_del_init(&nbl->nbl_list);  in nfsd4_lock()
7703 				list_del_init(&nbl->nbl_lru);  in nfsd4_lock()
7704 				kref_put(&nbl->nbl_kref, free_nbl);  in nfsd4_lock()
7707 			spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lock()
7715 		if (cstate->replay_owner &&  in nfsd4_lock()
7716 		    cstate->replay_owner != &lock_sop->lo_owner &&  in nfsd4_lock()
7718 			lock_sop->lo_owner.so_seqid++;  in nfsd4_lock()
7721 		 * If this is a new, never-before-used stateid, and we are  in nfsd4_lock()
7727 		mutex_unlock(&lock_stp->st_mutex);  in nfsd4_lock()
7729 		nfs4_put_stid(&lock_stp->st_stid);  in nfsd4_lock()
7732 		nfs4_put_stid(&open_stp->st_stid);  in nfsd4_lock()
7753 	inode = fhp->fh_dentry->d_inode;  in nfsd_test_lock()
7758 	lock->fl_file = nf->nf_file;  in nfsd_test_lock()
7759 	err = nfserrno(vfs_test_lock(nf->nf_file, lock));  in nfsd_test_lock()
7760 	lock->fl_file = NULL;  in nfsd_test_lock()
7774 	struct nfsd4_lockt *lockt = &u->lockt;  in nfsd4_lockt()
7783 	if (check_lock_length(lockt->lt_offset, lockt->lt_length))  in nfsd4_lockt()
7787 		status = set_client(&lockt->lt_clientid, cstate, nn);  in nfsd4_lockt()
7792 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))  in nfsd4_lockt()
7802 	switch (lockt->lt_type) {  in nfsd4_lockt()
7805 			file_lock->fl_type = F_RDLCK;  in nfsd4_lockt()
7809 			file_lock->fl_type = F_WRLCK;  in nfsd4_lockt()
7817 	lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);  in nfsd4_lockt()
7819 		file_lock->fl_owner = (fl_owner_t)lo;  in nfsd4_lockt()
7820 	file_lock->fl_pid = current->tgid;  in nfsd4_lockt()
7821 	file_lock->fl_flags = FL_POSIX;  in nfsd4_lockt()
7823 	file_lock->fl_start = lockt->lt_offset;  in nfsd4_lockt()
7824 	file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);  in nfsd4_lockt()
7828 	status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);  in nfsd4_lockt()
7832 	if (file_lock->fl_type != F_UNLCK) {  in nfsd4_lockt()
7834 		nfs4_set_lock_denied(file_lock, &lockt->lt_denied);  in nfsd4_lockt()
7838 		nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_lockt()
7848 	struct nfsd4_locku *locku = &u->locku;  in nfsd4_locku()
7857 		(long long) locku->lu_offset,  in nfsd4_locku()
7858 		(long long) locku->lu_length);  in nfsd4_locku()
7860 	if (check_lock_length(locku->lu_offset, locku->lu_length))  in nfsd4_locku()
7863 	status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,  in nfsd4_locku()
7864 					&locku->lu_stateid, NFS4_LOCK_STID,  in nfsd4_locku()
7868 	nf = find_any_file(stp->st_stid.sc_file);  in nfsd4_locku()
7880 	file_lock->fl_type = F_UNLCK;  in nfsd4_locku()
7881 	file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));  in nfsd4_locku()
7882 	file_lock->fl_pid = current->tgid;  in nfsd4_locku()
7883 	file_lock->fl_file = nf->nf_file;  in nfsd4_locku()
7884 	file_lock->fl_flags = FL_POSIX;  in nfsd4_locku()
7885 	file_lock->fl_lmops = &nfsd_posix_mng_ops;  in nfsd4_locku()
7886 	file_lock->fl_start = locku->lu_offset;  in nfsd4_locku()
7888 	file_lock->fl_end = last_byte_offset(locku->lu_offset,  in nfsd4_locku()
7889 						locku->lu_length);  in nfsd4_locku()
7892 	err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL);  in nfsd4_locku()
7897 	nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);  in nfsd4_locku()
7901 	mutex_unlock(&stp->st_mutex);  in nfsd4_locku()
7902 	nfs4_put_stid(&stp->st_stid);  in nfsd4_locku()
7928 	spin_lock(&fp->fi_lock);  in check_for_locks()
7936 	inode = file_inode(nf->nf_file);  in check_for_locks()
7939 	if (flctx && !list_empty_careful(&flctx->flc_posix)) {  in check_for_locks()
7940 		spin_lock(&flctx->flc_lock);  in check_for_locks()
7941 		list_for_each_entry(fl, &flctx->flc_posix, fl_list) {  in check_for_locks()
7942 			if (fl->fl_owner == (fl_owner_t)lowner) {  in check_for_locks()
7947 		spin_unlock(&flctx->flc_lock);  in check_for_locks()
7950 	spin_unlock(&fp->fi_lock);  in check_for_locks()
7955  * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations
7960  * Check if theree are any locks still held and if not - free the lockowner
7974 	struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;  in nfsd4_release_lockowner()
7976 	clientid_t *clid = &rlockowner->rl_clientid;  in nfsd4_release_lockowner()
7984 		clid->cl_boot, clid->cl_id);  in nfsd4_release_lockowner()
7989 	clp = cstate->clp;  in nfsd4_release_lockowner()
7991 	spin_lock(&clp->cl_lock);  in nfsd4_release_lockowner()
7992 	lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner);  in nfsd4_release_lockowner()
7994 		spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
7998 	list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {  in nfsd4_release_lockowner()
7999 		if (check_for_locks(stp->st_stid.sc_file, lo)) {  in nfsd4_release_lockowner()
8000 			spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
8001 			nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_release_lockowner()
8006 	while (!list_empty(&lo->lo_owner.so_stateids)) {  in nfsd4_release_lockowner()
8007 		stp = list_first_entry(&lo->lo_owner.so_stateids,  in nfsd4_release_lockowner()
8013 	spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
8017 	nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_release_lockowner()
8033 	return (crp && crp->cr_clp);  in nfs4_has_reclaimed_state()
8052 		INIT_LIST_HEAD(&crp->cr_strhash);  in nfs4_client_to_reclaim()
8053 		list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);  in nfs4_client_to_reclaim()
8054 		crp->cr_name.data = name.data;  in nfs4_client_to_reclaim()
8055 		crp->cr_name.len = name.len;  in nfs4_client_to_reclaim()
8056 		crp->cr_princhash.data = princhash.data;  in nfs4_client_to_reclaim()
8057 		crp->cr_princhash.len = princhash.len;  in nfs4_client_to_reclaim()
8058 		crp->cr_clp = NULL;  in nfs4_client_to_reclaim()
8059 		nn->reclaim_str_hashtbl_size++;  in nfs4_client_to_reclaim()
8067 	list_del(&crp->cr_strhash);  in nfs4_remove_reclaim_record()
8068 	kfree(crp->cr_name.data);  in nfs4_remove_reclaim_record()
8069 	kfree(crp->cr_princhash.data);  in nfs4_remove_reclaim_record()
8071 	nn->reclaim_str_hashtbl_size--;  in nfs4_remove_reclaim_record()
8081 		while (!list_empty(&nn->reclaim_str_hashtbl[i])) {  in nfs4_release_reclaim()
8082 			crp = list_entry(nn->reclaim_str_hashtbl[i].next,  in nfs4_release_reclaim()
8087 	WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);  in nfs4_release_reclaim()
8099 	list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {  in nfsd4_find_reclaim_client()
8100 		if (compare_blob(&crp->cr_name, &name) == 0) {  in nfsd4_find_reclaim_client()
8110 	if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))  in nfs4_check_open_reclaim()
8137 	max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);  in set_max_delegations()
8145 	nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,  in nfs4_state_create_net()
8148 	if (!nn->conf_id_hashtbl)  in nfs4_state_create_net()
8150 	nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,  in nfs4_state_create_net()
8153 	if (!nn->unconf_id_hashtbl)  in nfs4_state_create_net()
8155 	nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE,  in nfs4_state_create_net()
8158 	if (!nn->sessionid_hashtbl)  in nfs4_state_create_net()
8162 		INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);  in nfs4_state_create_net()
8163 		INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);  in nfs4_state_create_net()
8166 		INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);  in nfs4_state_create_net()
8167 	nn->conf_name_tree = RB_ROOT;  in nfs4_state_create_net()
8168 	nn->unconf_name_tree = RB_ROOT;  in nfs4_state_create_net()
8169 	nn->boot_time = ktime_get_real_seconds();  in nfs4_state_create_net()
8170 	nn->grace_ended = false;  in nfs4_state_create_net()
8171 	nn->nfsd4_manager.block_opens = true;  in nfs4_state_create_net()
8172 	INIT_LIST_HEAD(&nn->nfsd4_manager.list);  in nfs4_state_create_net()
8173 	INIT_LIST_HEAD(&nn->client_lru);  in nfs4_state_create_net()
8174 	INIT_LIST_HEAD(&nn->close_lru);  in nfs4_state_create_net()
8175 	INIT_LIST_HEAD(&nn->del_recall_lru);  in nfs4_state_create_net()
8176 	spin_lock_init(&nn->client_lock);  in nfs4_state_create_net()
8177 	spin_lock_init(&nn->s2s_cp_lock);  in nfs4_state_create_net()
8178 	idr_init(&nn->s2s_cp_stateids);  in nfs4_state_create_net()
8179 	atomic_set(&nn->pending_async_copies, 0);  in nfs4_state_create_net()
8181 	spin_lock_init(&nn->blocked_locks_lock);  in nfs4_state_create_net()
8182 	INIT_LIST_HEAD(&nn->blocked_locks_lru);  in nfs4_state_create_net()
8184 	INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);  in nfs4_state_create_net()
8185 	INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker);  in nfs4_state_create_net()
8188 	nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan;  in nfs4_state_create_net()
8189 	nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count;  in nfs4_state_create_net()
8190 	nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS;  in nfs4_state_create_net()
8192 	if (register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client"))  in nfs4_state_create_net()
8198 	kfree(nn->sessionid_hashtbl);  in nfs4_state_create_net()
8200 	kfree(nn->unconf_id_hashtbl);  in nfs4_state_create_net()
8202 	kfree(nn->conf_id_hashtbl);  in nfs4_state_create_net()
8204 	return -ENOMEM;  in nfs4_state_create_net()
8215 		while (!list_empty(&nn->conf_id_hashtbl[i])) {  in nfs4_state_destroy_net()
8216 			clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);  in nfs4_state_destroy_net()
8221 	WARN_ON(!list_empty(&nn->blocked_locks_lru));  in nfs4_state_destroy_net()
8224 		while (!list_empty(&nn->unconf_id_hashtbl[i])) {  in nfs4_state_destroy_net()
8225 			clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);  in nfs4_state_destroy_net()
8230 	kfree(nn->sessionid_hashtbl);  in nfs4_state_destroy_net()
8231 	kfree(nn->unconf_id_hashtbl);  in nfs4_state_destroy_net()
8232 	kfree(nn->conf_id_hashtbl);  in nfs4_state_destroy_net()
8245 	locks_start_grace(net, &nn->nfsd4_manager);  in nfs4_state_start_net()
8247 	if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)  in nfs4_state_start_net()
8249 	printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n",  in nfs4_state_start_net()
8250 	       nn->nfsd4_grace, net->ns.inum);  in nfs4_state_start_net()
8252 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);  in nfs4_state_start_net()
8257 			net->ns.inum);  in nfs4_state_start_net()
8258 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);  in nfs4_state_start_net()
8291 	unregister_shrinker(&nn->nfsd_client_shrinker);  in nfs4_state_shutdown_net()
8292 	cancel_work_sync(&nn->nfsd_shrinker_work);  in nfs4_state_shutdown_net()
8293 	cancel_delayed_work_sync(&nn->laundromat_work);  in nfs4_state_shutdown_net()
8294 	locks_end_grace(&nn->nfsd4_manager);  in nfs4_state_shutdown_net()
8298 	list_for_each_safe(pos, next, &nn->del_recall_lru) {  in nfs4_state_shutdown_net()
8301 		list_add(&dp->dl_recall_lru, &reaplist);  in nfs4_state_shutdown_net()
8306 		list_del_init(&dp->dl_recall_lru);  in nfs4_state_shutdown_net()
8329 		memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));  in get_stateid()
8335 	if (cstate->minorversion) {  in put_stateid()
8336 		memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));  in put_stateid()
8354 	put_stateid(cstate, &u->open_downgrade.od_stateid);  in nfsd4_set_opendowngradestateid()
8361 	put_stateid(cstate, &u->open.op_stateid);  in nfsd4_set_openstateid()
8368 	put_stateid(cstate, &u->close.cl_stateid);  in nfsd4_set_closestateid()
8375 	put_stateid(cstate, &u->lock.lk_resp_stateid);  in nfsd4_set_lockstateid()
8386 	get_stateid(cstate, &u->open_downgrade.od_stateid);  in nfsd4_get_opendowngradestateid()
8393 	get_stateid(cstate, &u->delegreturn.dr_stateid);  in nfsd4_get_delegreturnstateid()
8400 	get_stateid(cstate, &u->free_stateid.fr_stateid);  in nfsd4_get_freestateid()
8407 	get_stateid(cstate, &u->setattr.sa_stateid);  in nfsd4_get_setattrstateid()
8414 	get_stateid(cstate, &u->close.cl_stateid);  in nfsd4_get_closestateid()
8421 	get_stateid(cstate, &u->locku.lu_stateid);  in nfsd4_get_lockustateid()
8428 	get_stateid(cstate, &u->read.rd_stateid);  in nfsd4_get_readstateid()
8435 	get_stateid(cstate, &u->write.wr_stateid);  in nfsd4_get_writestateid()
8439  * nfsd4_deleg_getattr_conflict - Recall if GETATTR causes conflict
8469 	spin_lock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()
8470 	list_for_each_entry(fl, &ctx->flc_lease, fl_list) {  in nfsd4_deleg_getattr_conflict()
8471 		if (fl->fl_flags == FL_LAYOUT)  in nfsd4_deleg_getattr_conflict()
8473 		if (fl->fl_lmops != &nfsd_lease_mng_ops) {  in nfsd4_deleg_getattr_conflict()
8475 			 * non-nfs lease, if it's a lease with F_RDLCK then  in nfsd4_deleg_getattr_conflict()
8479 			if (fl->fl_type == F_RDLCK)  in nfsd4_deleg_getattr_conflict()
8483 		if (fl->fl_type == F_WRLCK) {  in nfsd4_deleg_getattr_conflict()
8484 			dp = fl->fl_owner;  in nfsd4_deleg_getattr_conflict()
8485 			if (dp->dl_recall.cb_clp == *(rqstp->rq_lease_breaker)) {  in nfsd4_deleg_getattr_conflict()
8486 				spin_unlock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()
8490 			spin_unlock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()
8500 	spin_unlock(&ctx->flc_lock);  in nfsd4_deleg_getattr_conflict()