54 #include "trace.h"
101  * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
128 	return ses->se_flags & NFS4_SESSION_DEAD;  in is_session_dead()
133 	if (atomic_read(&ses->se_ref) > ref_held_by_me)  in mark_session_dead_locked()
135 	ses->se_flags |= NFS4_SESSION_DEAD;  in mark_session_dead_locked()
141 	return clp->cl_time == 0;  in is_client_expired()
146 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in get_client_locked()
148 	lockdep_assert_held(&nn->client_lock);  in get_client_locked()
152 	atomic_inc(&clp->cl_rpc_users);  in get_client_locked()
160 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in renew_client_locked()
166 			clp->cl_clientid.cl_boot,  in renew_client_locked()
167 			clp->cl_clientid.cl_id);  in renew_client_locked()
171 	list_move_tail(&clp->cl_lru, &nn->client_lru);  in renew_client_locked()
172 	clp->cl_time = ktime_get_boottime_seconds();  in renew_client_locked()
177 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in put_client_renew_locked()
179 	lockdep_assert_held(&nn->client_lock);  in put_client_renew_locked()
181 	if (!atomic_dec_and_test(&clp->cl_rpc_users))  in put_client_renew_locked()
191 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in put_client_renew()
193 	if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock))  in put_client_renew()
199 	spin_unlock(&nn->client_lock);  in put_client_renew()
208 	status = get_client_locked(ses->se_client);  in nfsd4_get_session_locked()
211 	atomic_inc(&ses->se_ref);  in nfsd4_get_session_locked()
217 	struct nfs4_client *clp = ses->se_client;  in nfsd4_put_session_locked()
218 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in nfsd4_put_session_locked()
220 	lockdep_assert_held(&nn->client_lock);  in nfsd4_put_session_locked()
222 	if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))  in nfsd4_put_session_locked()
229 	struct nfs4_client *clp = ses->se_client;  in nfsd4_put_session()
230 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in nfsd4_put_session()
232 	spin_lock(&nn->client_lock);  in nfsd4_put_session()
234 	spin_unlock(&nn->client_lock);  in nfsd4_put_session()
243 	spin_lock(&nn->blocked_locks_lock);  in find_blocked_lock()
244 	list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {  in find_blocked_lock()
245 		if (fh_match(fh, &cur->nbl_fh)) {  in find_blocked_lock()
246 			list_del_init(&cur->nbl_list);  in find_blocked_lock()
247 			list_del_init(&cur->nbl_lru);  in find_blocked_lock()
252 	spin_unlock(&nn->blocked_locks_lock);  in find_blocked_lock()
254 		locks_delete_block(&found->nbl_lock);  in find_blocked_lock()
268 			INIT_LIST_HEAD(&nbl->nbl_list);  in find_or_allocate_block()
269 			INIT_LIST_HEAD(&nbl->nbl_lru);  in find_or_allocate_block()
270 			fh_copy_shallow(&nbl->nbl_fh, fh);  in find_or_allocate_block()
271 			locks_init_lock(&nbl->nbl_lock);  in find_or_allocate_block()
272 			nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,  in find_or_allocate_block()
283 	locks_delete_block(&nbl->nbl_lock);  in free_blocked_lock()
284 	locks_release_private(&nbl->nbl_lock);  in free_blocked_lock()
291 	struct nfs4_client *clp = lo->lo_owner.so_client;  in remove_blocked_locks()
292 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in remove_blocked_locks()
297 	spin_lock(&nn->blocked_locks_lock);  in remove_blocked_locks()
298 	while (!list_empty(&lo->lo_blocked)) {  in remove_blocked_locks()
299 		nbl = list_first_entry(&lo->lo_blocked,  in remove_blocked_locks()
302 		list_del_init(&nbl->nbl_list);  in remove_blocked_locks()
303 		list_move(&nbl->nbl_lru, &reaplist);  in remove_blocked_locks()
305 	spin_unlock(&nn->blocked_locks_lock);  in remove_blocked_locks()
311 		list_del_init(&nbl->nbl_lru);  in remove_blocked_locks()
321 	locks_delete_block(&nbl->nbl_lock);  in nfsd4_cb_notify_lock_prepare()
332 	switch (task->tk_status) {  in nfsd4_cb_notify_lock_done()
333 	case -NFS4ERR_DELAY:  in nfsd4_cb_notify_lock_done()
359 	atomic_inc(&sop->so_count);  in nfs4_get_stateowner()
366 	return (sop->so_owner.len == owner->len) &&  in same_owner_str()
367 		0 == memcmp(sop->so_owner.data, owner->data, owner->len);  in same_owner_str()
376 	lockdep_assert_held(&clp->cl_lock);  in find_openstateowner_str_locked()
378 	list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],  in find_openstateowner_str_locked()
380 		if (!so->so_is_open_owner)  in find_openstateowner_str_locked()
382 		if (same_owner_str(so, &open->op_owner))  in find_openstateowner_str_locked()
394 	spin_lock(&clp->cl_lock);  in find_openstateowner_str()
396 	spin_unlock(&clp->cl_lock);  in find_openstateowner_str()
406 	while (nbytes--) {  in opaque_hashval()
425 	if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) {  in put_nfs4_file()
426 		hlist_del_rcu(&fi->fi_hash);  in put_nfs4_file()
428 		WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));  in put_nfs4_file()
429 		WARN_ON_ONCE(!list_empty(&fi->fi_delegations));  in put_nfs4_file()
430 		call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);  in put_nfs4_file()
437 	if (f->fi_fds[oflag])  in __nfs4_get_fd()
438 		return nfsd_file_get(f->fi_fds[oflag]);  in __nfs4_get_fd()
447 	lockdep_assert_held(&f->fi_lock);  in find_writeable_file_locked()
460 	spin_lock(&f->fi_lock);  in find_writeable_file()
462 	spin_unlock(&f->fi_lock);  in find_writeable_file()
472 	lockdep_assert_held(&f->fi_lock);  in find_readable_file_locked()
485 	spin_lock(&f->fi_lock);  in find_readable_file()
487 	spin_unlock(&f->fi_lock);  in find_readable_file()
499 	spin_lock(&f->fi_lock);  in find_any_file()
506 	spin_unlock(&f->fi_lock);  in find_any_file()
512 	lockdep_assert_held(&f->fi_lock);  in find_any_file_locked()
514 	if (f->fi_fds[O_RDWR])  in find_any_file_locked()
515 		return f->fi_fds[O_RDWR];  in find_any_file_locked()
516 	if (f->fi_fds[O_WRONLY])  in find_any_file_locked()
517 		return f->fi_fds[O_WRONLY];  in find_any_file_locked()
518 	if (f->fi_fds[O_RDONLY])  in find_any_file_locked()
519 		return f->fi_fds[O_RDONLY];  in find_any_file_locked()
525 	lockdep_assert_held(&f->fi_lock);  in find_deleg_file_locked()
527 	if (f->fi_deleg_file)  in find_deleg_file_locked()
528 		return f->fi_deleg_file;  in find_deleg_file_locked()
542 #define OWNER_HASH_MASK             (OWNER_HASH_SIZE - 1)
548 	ret = opaque_hashval(ownername->data, ownername->len);  in ownerstr_hashval()
558 	return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);  in nfsd_fh_hashval()
563 	return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);  in file_hashval()
571 	lockdep_assert_held(&fp->fi_lock);  in __nfs4_file_get_access()
574 		atomic_inc(&fp->fi_access[O_WRONLY]);  in __nfs4_file_get_access()
576 		atomic_inc(&fp->fi_access[O_RDONLY]);  in __nfs4_file_get_access()
582 	lockdep_assert_held(&fp->fi_lock);  in nfs4_file_get_access()
589 	if ((access & fp->fi_share_deny) != 0)  in nfs4_file_get_access()
605 		    atomic_read(&fp->fi_access[O_RDONLY]))  in nfs4_file_check_deny()
609 		    atomic_read(&fp->fi_access[O_WRONLY]))  in nfs4_file_check_deny()
617 	might_lock(&fp->fi_lock);  in __nfs4_file_put_access()
619 	if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {  in __nfs4_file_put_access()
623 		swap(f1, fp->fi_fds[oflag]);  in __nfs4_file_put_access()
624 		if (atomic_read(&fp->fi_access[1 - oflag]) == 0)  in __nfs4_file_put_access()
625 			swap(f2, fp->fi_fds[O_RDWR]);  in __nfs4_file_put_access()
626 		spin_unlock(&fp->fi_lock);  in __nfs4_file_put_access()
648  * Note that we only allocate it for pNFS-enabled exports, otherwise
658 		co->co_client = clp;  in alloc_clnt_odstate()
659 		refcount_set(&co->co_odcount, 1);  in alloc_clnt_odstate()
667 	struct nfs4_file *fp = co->co_file;  in hash_clnt_odstate_locked()
669 	lockdep_assert_held(&fp->fi_lock);  in hash_clnt_odstate_locked()
670 	list_add(&co->co_perfile, &fp->fi_clnt_odstate);  in hash_clnt_odstate_locked()
677 		refcount_inc(&co->co_odcount);  in get_clnt_odstate()
688 	fp = co->co_file;  in put_clnt_odstate()
689 	if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {  in put_clnt_odstate()
690 		list_del(&co->co_perfile);  in put_clnt_odstate()
691 		spin_unlock(&fp->fi_lock);  in put_clnt_odstate()
693 		nfsd4_return_all_file_layouts(co->co_client, fp);  in put_clnt_odstate()
707 	cl = new->co_client;  in find_or_hash_clnt_odstate()
709 	spin_lock(&fp->fi_lock);  in find_or_hash_clnt_odstate()
710 	list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {  in find_or_hash_clnt_odstate()
711 		if (co->co_client == cl) {  in find_or_hash_clnt_odstate()
717 	co->co_file = fp;  in find_or_hash_clnt_odstate()
720 	spin_unlock(&fp->fi_lock);  in find_or_hash_clnt_odstate()
735 	spin_lock(&cl->cl_lock);  in nfs4_alloc_stid()
737 	new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT);  in nfs4_alloc_stid()
738 	spin_unlock(&cl->cl_lock);  in nfs4_alloc_stid()
743 	stid->sc_free = sc_free;  in nfs4_alloc_stid()
744 	stid->sc_client = cl;  in nfs4_alloc_stid()
745 	stid->sc_stateid.si_opaque.so_id = new_id;  in nfs4_alloc_stid()
746 	stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;  in nfs4_alloc_stid()
748 	refcount_set(&stid->sc_count, 1);  in nfs4_alloc_stid()
749 	spin_lock_init(&stid->sc_lock);  in nfs4_alloc_stid()
750 	INIT_LIST_HEAD(&stid->sc_cp_list);  in nfs4_alloc_stid()
775 	stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;  in nfs4_init_cp_state()
776 	stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;  in nfs4_init_cp_state()
777 	stid->sc_type = sc_type;  in nfs4_init_cp_state()
780 	spin_lock(&nn->s2s_cp_lock);  in nfs4_init_cp_state()
781 	new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT);  in nfs4_init_cp_state()
782 	stid->stid.si_opaque.so_id = new_id;  in nfs4_init_cp_state()
783 	stid->stid.si_generation = 1;  in nfs4_init_cp_state()
784 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_init_cp_state()
793 	return nfs4_init_cp_state(nn, &copy->cp_stateid, NFS4_COPY_STID);  in nfs4_init_copy_state()
804 	cps->cpntf_time = ktime_get_boottime_seconds();  in nfs4_alloc_init_cpntf_state()
805 	refcount_set(&cps->cp_stateid.sc_count, 1);  in nfs4_alloc_init_cpntf_state()
806 	if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID))  in nfs4_alloc_init_cpntf_state()
808 	spin_lock(&nn->s2s_cp_lock);  in nfs4_alloc_init_cpntf_state()
809 	list_add(&cps->cp_list, &p_stid->sc_cp_list);  in nfs4_alloc_init_cpntf_state()
810 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_alloc_init_cpntf_state()
821 	WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID);  in nfs4_free_copy_state()
822 	nn = net_generic(copy->cp_clp->net, nfsd_net_id);  in nfs4_free_copy_state()
823 	spin_lock(&nn->s2s_cp_lock);  in nfs4_free_copy_state()
824 	idr_remove(&nn->s2s_cp_stateids,  in nfs4_free_copy_state()
825 		   copy->cp_stateid.stid.si_opaque.so_id);  in nfs4_free_copy_state()
826 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_free_copy_state()
835 	spin_lock(&nn->s2s_cp_lock);  in nfs4_free_cpntf_statelist()
836 	while (!list_empty(&stid->sc_cp_list)) {  in nfs4_free_cpntf_statelist()
837 		cps = list_first_entry(&stid->sc_cp_list,  in nfs4_free_cpntf_statelist()
841 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_free_cpntf_statelist()
857 	WARN_ON(!list_empty(&stid->sc_cp_list));  in nfs4_free_deleg()
874  * low 3 bytes as hash-table indices.
893 	if (bd->entries == 0)  in delegation_blocked()
895 	if (ktime_get_seconds() - bd->swap_time > 30) {  in delegation_blocked()
897 		if (ktime_get_seconds() - bd->swap_time > 30) {  in delegation_blocked()
898 			bd->entries -= bd->old_entries;  in delegation_blocked()
899 			bd->old_entries = bd->entries;  in delegation_blocked()
900 			memset(bd->set[bd->new], 0,  in delegation_blocked()
901 			       sizeof(bd->set[0]));  in delegation_blocked()
902 			bd->new = 1-bd->new;  in delegation_blocked()
903 			bd->swap_time = ktime_get_seconds();  in delegation_blocked()
907 	hash = jhash(&fh->fh_base, fh->fh_size, 0);  in delegation_blocked()
908 	if (test_bit(hash&255, bd->set[0]) &&  in delegation_blocked()
909 	    test_bit((hash>>8)&255, bd->set[0]) &&  in delegation_blocked()
910 	    test_bit((hash>>16)&255, bd->set[0]))  in delegation_blocked()
913 	if (test_bit(hash&255, bd->set[1]) &&  in delegation_blocked()
914 	    test_bit((hash>>8)&255, bd->set[1]) &&  in delegation_blocked()
915 	    test_bit((hash>>16)&255, bd->set[1]))  in delegation_blocked()
926 	hash = jhash(&fh->fh_base, fh->fh_size, 0);  in block_delegations()
929 	__set_bit(hash&255, bd->set[bd->new]);  in block_delegations()
930 	__set_bit((hash>>8)&255, bd->set[bd->new]);  in block_delegations()
931 	__set_bit((hash>>16)&255, bd->set[bd->new]);  in block_delegations()
932 	if (bd->entries == 0)  in block_delegations()
933 		bd->swap_time = ktime_get_seconds();  in block_delegations()
934 	bd->entries += 1;  in block_delegations()
950 	if (delegation_blocked(&current_fh->fh_handle))  in alloc_init_deleg()
961 	dp->dl_stid.sc_stateid.si_generation = 1;  in alloc_init_deleg()
962 	INIT_LIST_HEAD(&dp->dl_perfile);  in alloc_init_deleg()
963 	INIT_LIST_HEAD(&dp->dl_perclnt);  in alloc_init_deleg()
964 	INIT_LIST_HEAD(&dp->dl_recall_lru);  in alloc_init_deleg()
965 	dp->dl_clnt_odstate = odstate;  in alloc_init_deleg()
967 	dp->dl_type = NFS4_OPEN_DELEGATE_READ;  in alloc_init_deleg()
968 	dp->dl_retries = 1;  in alloc_init_deleg()
969 	nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,  in alloc_init_deleg()
972 	dp->dl_stid.sc_file = fp;  in alloc_init_deleg()
982 	struct nfs4_file *fp = s->sc_file;  in nfs4_put_stid()
983 	struct nfs4_client *clp = s->sc_client;  in nfs4_put_stid()
985 	might_lock(&clp->cl_lock);  in nfs4_put_stid()
987 	if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) {  in nfs4_put_stid()
991 	idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);  in nfs4_put_stid()
992 	nfs4_free_cpntf_statelist(clp->net, s);  in nfs4_put_stid()
993 	spin_unlock(&clp->cl_lock);  in nfs4_put_stid()
994 	s->sc_free(s);  in nfs4_put_stid()
1002 	stateid_t *src = &stid->sc_stateid;  in nfs4_inc_and_copy_stateid()
1004 	spin_lock(&stid->sc_lock);  in nfs4_inc_and_copy_stateid()
1005 	if (unlikely(++src->si_generation == 0))  in nfs4_inc_and_copy_stateid()
1006 		src->si_generation = 1;  in nfs4_inc_and_copy_stateid()
1008 	spin_unlock(&stid->sc_lock);  in nfs4_inc_and_copy_stateid()
1015 	spin_lock(&fp->fi_lock);  in put_deleg_file()
1016 	if (--fp->fi_delegees == 0)  in put_deleg_file()
1017 		swap(nf, fp->fi_deleg_file);  in put_deleg_file()
1018 	spin_unlock(&fp->fi_lock);  in put_deleg_file()
1026 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in nfs4_unlock_deleg_lease()
1027 	struct nfsd_file *nf = fp->fi_deleg_file;  in nfs4_unlock_deleg_lease()
1029 	WARN_ON_ONCE(!fp->fi_delegees);  in nfs4_unlock_deleg_lease()
1031 	vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp);  in nfs4_unlock_deleg_lease()
1037 	put_clnt_odstate(dp->dl_clnt_odstate);  in destroy_unhashed_deleg()
1039 	nfs4_put_stid(&dp->dl_stid);  in destroy_unhashed_deleg()
1044 	s->sc_type = 0;  in nfs4_unhash_stid()
1048  * nfs4_delegation_exists - Discover if this delegation already exists
1063 	lockdep_assert_held(&fp->fi_lock);  in nfs4_delegation_exists()
1065 	list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {  in nfs4_delegation_exists()
1066 		searchclp = searchdp->dl_stid.sc_client;  in nfs4_delegation_exists()
1075  * hash_delegation_locked - Add a delegation to the appropriate lists
1082  *      On error: -EAGAIN if one was previously granted to this
1090 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in hash_delegation_locked()
1093 	lockdep_assert_held(&fp->fi_lock);  in hash_delegation_locked()
1096 		return -EAGAIN;  in hash_delegation_locked()
1097 	refcount_inc(&dp->dl_stid.sc_count);  in hash_delegation_locked()
1098 	dp->dl_stid.sc_type = NFS4_DELEG_STID;  in hash_delegation_locked()
1099 	list_add(&dp->dl_perfile, &fp->fi_delegations);  in hash_delegation_locked()
1100 	list_add(&dp->dl_perclnt, &clp->cl_delegations);  in hash_delegation_locked()
1106 	return !(list_empty(&dp->dl_perfile));  in delegation_hashed()
1112 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in unhash_delegation_locked()
1119 	dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;  in unhash_delegation_locked()
1121 	++dp->dl_time;  in unhash_delegation_locked()
1122 	spin_lock(&fp->fi_lock);  in unhash_delegation_locked()
1123 	list_del_init(&dp->dl_perclnt);  in unhash_delegation_locked()
1124 	list_del_init(&dp->dl_recall_lru);  in unhash_delegation_locked()
1125 	list_del_init(&dp->dl_perfile);  in unhash_delegation_locked()
1126 	spin_unlock(&fp->fi_lock);  in unhash_delegation_locked()
1143 	struct nfs4_client *clp = dp->dl_stid.sc_client;  in revoke_delegation()
1145 	WARN_ON(!list_empty(&dp->dl_recall_lru));  in revoke_delegation()
1147 	if (clp->cl_minorversion) {  in revoke_delegation()
1148 		spin_lock(&clp->cl_lock);  in revoke_delegation()
1149 		dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;  in revoke_delegation()
1150 		refcount_inc(&dp->dl_stid.sc_count);  in revoke_delegation()
1151 		list_add(&dp->dl_recall_lru, &clp->cl_revoked);  in revoke_delegation()
1152 		spin_unlock(&clp->cl_lock);  in revoke_delegation()
1208 	stp->st_access_bmap |= mask;  in set_access()
1218 	stp->st_access_bmap &= ~mask;  in clear_access()
1227 	return (bool)(stp->st_access_bmap & mask);  in test_access()
1237 	stp->st_deny_bmap |= mask;  in set_deny()
1247 	stp->st_deny_bmap &= ~mask;  in clear_deny()
1256 	return (bool)(stp->st_deny_bmap & mask);  in test_deny()
1282 	spin_lock(&fp->fi_lock);  in recalculate_deny_mode()
1283 	fp->fi_share_deny = 0;  in recalculate_deny_mode()
1284 	list_for_each_entry(stp, &fp->fi_stateids, st_perfile)  in recalculate_deny_mode()
1285 		fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);  in recalculate_deny_mode()
1286 	spin_unlock(&fp->fi_lock);  in recalculate_deny_mode()
1302 	/* Recalculate per-file deny mode if there was a change */  in reset_union_bmap_deny()
1304 		recalculate_deny_mode(stp->st_stid.sc_file);  in reset_union_bmap_deny()
1312 	struct nfs4_file *fp = stp->st_stid.sc_file;  in release_all_access()
1314 	if (fp && stp->st_deny_bmap != 0)  in release_all_access()
1319 			nfs4_file_put_access(stp->st_stid.sc_file, i);  in release_all_access()
1326 	kfree(sop->so_owner.data);  in nfs4_free_stateowner()
1327 	sop->so_ops->so_free(sop);  in nfs4_free_stateowner()
1332 	struct nfs4_client *clp = sop->so_client;  in nfs4_put_stateowner()
1334 	might_lock(&clp->cl_lock);  in nfs4_put_stateowner()
1336 	if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))  in nfs4_put_stateowner()
1338 	sop->so_ops->so_unhash(sop);  in nfs4_put_stateowner()
1339 	spin_unlock(&clp->cl_lock);  in nfs4_put_stateowner()
1346 	return list_empty(&stp->st_perfile);  in nfs4_ol_stateid_unhashed()
1351 	struct nfs4_file *fp = stp->st_stid.sc_file;  in unhash_ol_stateid()
1353 	lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);  in unhash_ol_stateid()
1355 	if (list_empty(&stp->st_perfile))  in unhash_ol_stateid()
1358 	spin_lock(&fp->fi_lock);  in unhash_ol_stateid()
1359 	list_del_init(&stp->st_perfile);  in unhash_ol_stateid()
1360 	spin_unlock(&fp->fi_lock);  in unhash_ol_stateid()
1361 	list_del(&stp->st_perstateowner);  in unhash_ol_stateid()
1369 	put_clnt_odstate(stp->st_clnt_odstate);  in nfs4_free_ol_stateid()
1371 	if (stp->st_stateowner)  in nfs4_free_ol_stateid()
1372 		nfs4_put_stateowner(stp->st_stateowner);  in nfs4_free_ol_stateid()
1373 	WARN_ON(!list_empty(&stid->sc_cp_list));  in nfs4_free_ol_stateid()
1380 	struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);  in nfs4_free_lock_stateid()
1383 	nf = find_any_file(stp->st_stid.sc_file);  in nfs4_free_lock_stateid()
1385 		get_file(nf->nf_file);  in nfs4_free_lock_stateid()
1386 		filp_close(nf->nf_file, (fl_owner_t)lo);  in nfs4_free_lock_stateid()
1400 	struct nfs4_stid *s = &stp->st_stid;  in put_ol_stateid_locked()
1401 	struct nfs4_client *clp = s->sc_client;  in put_ol_stateid_locked()
1403 	lockdep_assert_held(&clp->cl_lock);  in put_ol_stateid_locked()
1405 	WARN_ON_ONCE(!list_empty(&stp->st_locks));  in put_ol_stateid_locked()
1407 	if (!refcount_dec_and_test(&s->sc_count)) {  in put_ol_stateid_locked()
1412 	idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);  in put_ol_stateid_locked()
1413 	list_add(&stp->st_locks, reaplist);  in put_ol_stateid_locked()
1418 	lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);  in unhash_lock_stateid()
1422 	list_del_init(&stp->st_locks);  in unhash_lock_stateid()
1423 	nfs4_unhash_stid(&stp->st_stid);  in unhash_lock_stateid()
1429 	struct nfs4_client *clp = stp->st_stid.sc_client;  in release_lock_stateid()
1432 	spin_lock(&clp->cl_lock);  in release_lock_stateid()
1434 	spin_unlock(&clp->cl_lock);  in release_lock_stateid()
1436 		nfs4_put_stid(&stp->st_stid);  in release_lock_stateid()
1441 	struct nfs4_client *clp = lo->lo_owner.so_client;  in unhash_lockowner_locked()
1443 	lockdep_assert_held(&clp->cl_lock);  in unhash_lockowner_locked()
1445 	list_del_init(&lo->lo_owner.so_strhash);  in unhash_lockowner_locked()
1463 		list_del(&stp->st_locks);  in free_ol_stateid_reaplist()
1464 		fp = stp->st_stid.sc_file;  in free_ol_stateid_reaplist()
1465 		stp->st_stid.sc_free(&stp->st_stid);  in free_ol_stateid_reaplist()
1476 	lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);  in release_open_stateid_locks()
1478 	while (!list_empty(&open_stp->st_locks)) {  in release_open_stateid_locks()
1479 		stp = list_entry(open_stp->st_locks.next,  in release_open_stateid_locks()
1489 	lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);  in unhash_open_stateid()
1501 	spin_lock(&stp->st_stid.sc_client->cl_lock);  in release_open_stateid()
1504 	spin_unlock(&stp->st_stid.sc_client->cl_lock);  in release_open_stateid()
1510 	struct nfs4_client *clp = oo->oo_owner.so_client;  in unhash_openowner_locked()
1512 	lockdep_assert_held(&clp->cl_lock);  in unhash_openowner_locked()
1514 	list_del_init(&oo->oo_owner.so_strhash);  in unhash_openowner_locked()
1515 	list_del_init(&oo->oo_perclient);  in unhash_openowner_locked()
1520 	struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,  in release_last_closed_stateid()
1524 	spin_lock(&nn->client_lock);  in release_last_closed_stateid()
1525 	s = oo->oo_last_closed_stid;  in release_last_closed_stateid()
1527 		list_del_init(&oo->oo_close_lru);  in release_last_closed_stateid()
1528 		oo->oo_last_closed_stid = NULL;  in release_last_closed_stateid()
1530 	spin_unlock(&nn->client_lock);  in release_last_closed_stateid()
1532 		nfs4_put_stid(&s->st_stid);  in release_last_closed_stateid()
1538 	struct nfs4_client *clp = oo->oo_owner.so_client;  in release_openowner()
1543 	spin_lock(&clp->cl_lock);  in release_openowner()
1545 	while (!list_empty(&oo->oo_owner.so_stateids)) {  in release_openowner()
1546 		stp = list_first_entry(&oo->oo_owner.so_stateids,  in release_openowner()
1551 	spin_unlock(&clp->cl_lock);  in release_openowner()
1554 	nfs4_put_stateowner(&oo->oo_owner);  in release_openowner()
1562 	return sid->sequence % SESSION_HASH_SIZE;  in hash_sessionid()
1569 	u32 *ptr = (u32 *)(&sessionid->data[0]);  in dump_sessionid()
1580  * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1585 	struct nfs4_stateowner *so = cstate->replay_owner;  in nfsd4_bump_seqid()
1596 	if (so->so_is_open_owner)  in nfsd4_bump_seqid()
1598 	so->so_seqid++;  in nfsd4_bump_seqid()
1605 	struct nfs4_client *clp = ses->se_client;  in gen_sessionid()
1608 	sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;  in gen_sessionid()
1609 	sid->clientid = clp->cl_clientid;  in gen_sessionid()
1610 	sid->sequence = current_sessionid++;  in gen_sessionid()
1611 	sid->reserved = 0;  in gen_sessionid()
1617  * the end of the initial SEQUENCE operation--the rest we regenerate
1623  * verifier), 12 for the compound header (with zero-length tag), and 44
1633 	for (i = 0; i < ses->se_fchannel.maxreqs; i++) {  in free_session_slots()
1634 		free_svc_cred(&ses->se_slots[i]->sl_cred);  in free_session_slots()
1635 		kfree(ses->se_slots[i]);  in free_session_slots()
1647 	if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)  in slot_bytes()
1650 		size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;  in slot_bytes()
1656  * re-negotiate active sessions and reduce their slot usage to make
1662 	u32 num = ca->maxreqs;  in nfsd4_get_drc_mem()
1668 		total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used;  in nfsd4_get_drc_mem()
1684 	 * over-allocation--it is better than failure.  in nfsd4_get_drc_mem()
1686 	scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads);  in nfsd4_get_drc_mem()
1703 	nfsd_drc_mem_used -= slotsize * ca->maxreqs;  in nfsd4_put_drc_mem()
1710 	int numslots = fattrs->maxreqs;  in alloc_session()
1724 		new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);  in alloc_session()
1725 		if (!new->se_slots[i])  in alloc_session()
1729 	memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));  in alloc_session()
1730 	memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));  in alloc_session()
1734 	while (i--)  in alloc_session()
1735 		kfree(new->se_slots[i]);  in alloc_session()
1742 	svc_xprt_put(c->cn_xprt);  in free_conn()
1749 	struct nfs4_client *clp = c->cn_session->se_client;  in nfsd4_conn_lost()
1751 	spin_lock(&clp->cl_lock);  in nfsd4_conn_lost()
1752 	if (!list_empty(&c->cn_persession)) {  in nfsd4_conn_lost()
1753 		list_del(&c->cn_persession);  in nfsd4_conn_lost()
1757 	spin_unlock(&clp->cl_lock);  in nfsd4_conn_lost()
1767 	svc_xprt_get(rqstp->rq_xprt);  in alloc_conn()
1768 	conn->cn_xprt = rqstp->rq_xprt;  in alloc_conn()
1769 	conn->cn_flags = flags;  in alloc_conn()
1770 	INIT_LIST_HEAD(&conn->cn_xpt_user.list);  in alloc_conn()
1776 	conn->cn_session = ses;  in __nfsd4_hash_conn()
1777 	list_add(&conn->cn_persession, &ses->se_conns);  in __nfsd4_hash_conn()
1782 	struct nfs4_client *clp = ses->se_client;  in nfsd4_hash_conn()
1784 	spin_lock(&clp->cl_lock);  in nfsd4_hash_conn()
1786 	spin_unlock(&clp->cl_lock);  in nfsd4_hash_conn()
1791 	conn->cn_xpt_user.callback = nfsd4_conn_lost;  in nfsd4_register_conn()
1792 	return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);  in nfsd4_register_conn()
1803 		nfsd4_conn_lost(&conn->cn_xpt_user);  in nfsd4_init_conn()
1805 	nfsd4_probe_callback_sync(ses->se_client);  in nfsd4_init_conn()
1812 	if (cses->flags & SESSION4_BACK_CHAN)  in alloc_conn_from_crses()
1820 	struct nfs4_client *clp = s->se_client;  in nfsd4_del_conns()
1823 	spin_lock(&clp->cl_lock);  in nfsd4_del_conns()
1824 	while (!list_empty(&s->se_conns)) {  in nfsd4_del_conns()
1825 		c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);  in nfsd4_del_conns()
1826 		list_del_init(&c->cn_persession);  in nfsd4_del_conns()
1827 		spin_unlock(&clp->cl_lock);  in nfsd4_del_conns()
1829 		unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);  in nfsd4_del_conns()
1832 		spin_lock(&clp->cl_lock);  in nfsd4_del_conns()
1834 	spin_unlock(&clp->cl_lock);  in nfsd4_del_conns()
1846 	nfsd4_put_drc_mem(&ses->se_fchannel);  in free_session()
1855 	new->se_client = clp;  in init_session()
1858 	INIT_LIST_HEAD(&new->se_conns);  in init_session()
1860 	new->se_cb_seq_nr = 1;  in init_session()
1861 	new->se_flags = cses->flags;  in init_session()
1862 	new->se_cb_prog = cses->callback_prog;  in init_session()
1863 	new->se_cb_sec = cses->cb_sec;  in init_session()
1864 	atomic_set(&new->se_ref, 0);  in init_session()
1865 	idx = hash_sessionid(&new->se_sessionid);  in init_session()
1866 	list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);  in init_session()
1867 	spin_lock(&clp->cl_lock);  in init_session()
1868 	list_add(&new->se_perclnt, &clp->cl_sessions);  in init_session()
1869 	spin_unlock(&clp->cl_lock);  in init_session()
1880 		rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);  in init_session()
1881 		clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);  in init_session()
1893 	lockdep_assert_held(&nn->client_lock);  in __find_in_sessionid_hashtbl()
1898 	list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {  in __find_in_sessionid_hashtbl()
1899 		if (!memcmp(elem->se_sessionid.data, sessionid->data,  in __find_in_sessionid_hashtbl()
1931 	struct nfs4_client *clp = ses->se_client;  in unhash_session()
1932 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_session()
1934 	lockdep_assert_held(&nn->client_lock);  in unhash_session()
1936 	list_del(&ses->se_hash);  in unhash_session()
1937 	spin_lock(&ses->se_client->cl_lock);  in unhash_session()
1938 	list_del(&ses->se_perclnt);  in unhash_session()
1939 	spin_unlock(&ses->se_client->cl_lock);  in unhash_session()
1951 	if (clid->cl_boot == (u32)nn->boot_time)  in STALE_CLIENTID()
1970 	xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);  in alloc_client()
1971 	if (clp->cl_name.data == NULL)  in alloc_client()
1973 	clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,  in alloc_client()
1976 	if (!clp->cl_ownerstr_hashtbl)  in alloc_client()
1979 		INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);  in alloc_client()
1980 	INIT_LIST_HEAD(&clp->cl_sessions);  in alloc_client()
1981 	idr_init(&clp->cl_stateids);  in alloc_client()
1982 	atomic_set(&clp->cl_rpc_users, 0);  in alloc_client()
1983 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;  in alloc_client()
1984 	INIT_LIST_HEAD(&clp->cl_idhash);  in alloc_client()
1985 	INIT_LIST_HEAD(&clp->cl_openowners);  in alloc_client()
1986 	INIT_LIST_HEAD(&clp->cl_delegations);  in alloc_client()
1987 	INIT_LIST_HEAD(&clp->cl_lru);  in alloc_client()
1988 	INIT_LIST_HEAD(&clp->cl_revoked);  in alloc_client()
1990 	INIT_LIST_HEAD(&clp->cl_lo_states);  in alloc_client()
1992 	INIT_LIST_HEAD(&clp->async_copies);  in alloc_client()
1993 	spin_lock_init(&clp->async_lock);  in alloc_client()
1994 	spin_lock_init(&clp->cl_lock);  in alloc_client()
1995 	rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");  in alloc_client()
1998 	kfree(clp->cl_name.data);  in alloc_client()
2009 	free_svc_cred(&clp->cl_cred);  in __free_client()
2010 	kfree(clp->cl_ownerstr_hashtbl);  in __free_client()
2011 	kfree(clp->cl_name.data);  in __free_client()
2012 	kfree(clp->cl_nii_domain.data);  in __free_client()
2013 	kfree(clp->cl_nii_name.data);  in __free_client()
2014 	idr_destroy(&clp->cl_stateids);  in __free_client()
2020 	kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);  in drop_client()
2026 	while (!list_empty(&clp->cl_sessions)) {  in free_client()
2028 		ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,  in free_client()
2030 		list_del(&ses->se_perclnt);  in free_client()
2031 		WARN_ON_ONCE(atomic_read(&ses->se_ref));  in free_client()
2034 	rpc_destroy_wait_queue(&clp->cl_cb_waitq);  in free_client()
2035 	if (clp->cl_nfsd_dentry) {  in free_client()
2036 		nfsd_client_rmdir(clp->cl_nfsd_dentry);  in free_client()
2037 		clp->cl_nfsd_dentry = NULL;  in free_client()
2047 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_client_locked()
2050 	lockdep_assert_held(&nn->client_lock);  in unhash_client_locked()
2053 	clp->cl_time = 0;  in unhash_client_locked()
2055 	if (!list_empty(&clp->cl_idhash)) {  in unhash_client_locked()
2056 		list_del_init(&clp->cl_idhash);  in unhash_client_locked()
2057 		if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))  in unhash_client_locked()
2058 			rb_erase(&clp->cl_namenode, &nn->conf_name_tree);  in unhash_client_locked()
2060 			rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);  in unhash_client_locked()
2062 	list_del_init(&clp->cl_lru);  in unhash_client_locked()
2063 	spin_lock(&clp->cl_lock);  in unhash_client_locked()
2064 	list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)  in unhash_client_locked()
2065 		list_del_init(&ses->se_hash);  in unhash_client_locked()
2066 	spin_unlock(&clp->cl_lock);  in unhash_client_locked()
2072 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in unhash_client()
2074 	spin_lock(&nn->client_lock);  in unhash_client()
2076 	spin_unlock(&nn->client_lock);  in unhash_client()
2081 	if (atomic_read(&clp->cl_rpc_users))  in mark_client_expired_locked()
2097 	while (!list_empty(&clp->cl_delegations)) {  in __destroy_client()
2098 		dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);  in __destroy_client()
2100 		list_add(&dp->dl_recall_lru, &reaplist);  in __destroy_client()
2105 		list_del_init(&dp->dl_recall_lru);  in __destroy_client()
2108 	while (!list_empty(&clp->cl_revoked)) {  in __destroy_client()
2109 		dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);  in __destroy_client()
2110 		list_del_init(&dp->dl_recall_lru);  in __destroy_client()
2111 		nfs4_put_stid(&dp->dl_stid);  in __destroy_client()
2113 	while (!list_empty(&clp->cl_openowners)) {  in __destroy_client()
2114 		oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);  in __destroy_client()
2115 		nfs4_get_stateowner(&oo->oo_owner);  in __destroy_client()
2121 		list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i],  in __destroy_client()
2124 			WARN_ON_ONCE(so->so_is_open_owner);  in __destroy_client()
2131 	if (clp->cl_cb_conn.cb_xprt)  in __destroy_client()
2132 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);  in __destroy_client()
2146 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in inc_reclaim_complete()
2148 	if (!nn->track_reclaim_completes)  in inc_reclaim_complete()
2150 	if (!nfsd4_find_reclaim_client(clp->cl_name, nn))  in inc_reclaim_complete()
2152 	if (atomic_inc_return(&nn->nr_reclaim_complete) ==  in inc_reclaim_complete()
2153 			nn->reclaim_str_hashtbl_size) {  in inc_reclaim_complete()
2155 				clp->net->ns.inum);  in inc_reclaim_complete()
2169 	memcpy(target->cl_verifier.data, source->data,  in copy_verf()
2170 			sizeof(target->cl_verifier.data));  in copy_verf()
2175 	target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;   in copy_clid()
2176 	target->cl_clientid.cl_id = source->cl_clientid.cl_id;   in copy_clid()
2181 	target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL);  in copy_cred()
2182 	target->cr_raw_principal = kstrdup(source->cr_raw_principal,  in copy_cred()
2184 	target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL);  in copy_cred()
2185 	if ((source->cr_principal && !target->cr_principal) ||  in copy_cred()
2186 	    (source->cr_raw_principal && !target->cr_raw_principal) ||  in copy_cred()
2187 	    (source->cr_targ_princ && !target->cr_targ_princ))  in copy_cred()
2188 		return -ENOMEM;  in copy_cred()
2190 	target->cr_flavor = source->cr_flavor;  in copy_cred()
2191 	target->cr_uid = source->cr_uid;  in copy_cred()
2192 	target->cr_gid = source->cr_gid;  in copy_cred()
2193 	target->cr_group_info = source->cr_group_info;  in copy_cred()
2194 	get_group_info(target->cr_group_info);  in copy_cred()
2195 	target->cr_gss_mech = source->cr_gss_mech;  in copy_cred()
2196 	if (source->cr_gss_mech)  in copy_cred()
2197 		gss_mech_get(source->cr_gss_mech);  in copy_cred()
2204 	if (o1->len < o2->len)  in compare_blob()
2205 		return -1;  in compare_blob()
2206 	if (o1->len > o2->len)  in compare_blob()
2208 	return memcmp(o1->data, o2->data, o1->len);  in compare_blob()
2214 	return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));  in same_verf()
2220 	return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);  in same_clid()
2227 	if (g1->ngroups != g2->ngroups)  in groups_equal()
2229 	for (i=0; i<g1->ngroups; i++)  in groups_equal()
2230 		if (!gid_eq(g1->gid[i], g2->gid[i]))  in groups_equal()
2239  * approximation.  We also don't want to allow non-gss use of a client
2247 	return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);  in is_gss_cred()
2255 		|| (!uid_eq(cr1->cr_uid, cr2->cr_uid))  in same_creds()
2256 		|| (!gid_eq(cr1->cr_gid, cr2->cr_gid))  in same_creds()
2257 		|| !groups_equal(cr1->cr_group_info, cr2->cr_group_info))  in same_creds()
2260 	if (cr1->cr_principal == cr2->cr_principal)  in same_creds()
2262 	if (!cr1->cr_principal || !cr2->cr_principal)  in same_creds()
2264 	return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);  in same_creds()
2269 	struct svc_cred *cr = &rqstp->rq_cred;  in svc_rqst_integrity_protected()
2272 	if (!cr->cr_gss_mech)  in svc_rqst_integrity_protected()
2274 	service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);  in svc_rqst_integrity_protected()
2281 	struct svc_cred *cr = &rqstp->rq_cred;  in nfsd4_mach_creds_match()
2283 	if (!cl->cl_mach_cred)  in nfsd4_mach_creds_match()
2285 	if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)  in nfsd4_mach_creds_match()
2289 	if (cl->cl_cred.cr_raw_principal)  in nfsd4_mach_creds_match()
2290 		return 0 == strcmp(cl->cl_cred.cr_raw_principal,  in nfsd4_mach_creds_match()
2291 						cr->cr_raw_principal);  in nfsd4_mach_creds_match()
2292 	if (!cr->cr_principal)  in nfsd4_mach_creds_match()
2294 	return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);  in nfsd4_mach_creds_match()
2302 	 * This is opaque to client, so no need to byte-swap. Use  in gen_confirm()
2306 	verf[1] = (__force __be32)nn->clverifier_counter++;  in gen_confirm()
2307 	memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));  in gen_confirm()
2312 	clp->cl_clientid.cl_boot = (u32)nn->boot_time;  in gen_clid()
2313 	clp->cl_clientid.cl_id = nn->clientid_counter++;  in gen_clid()
2322 	ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);  in find_stateid_locked()
2323 	if (!ret || !ret->sc_type)  in find_stateid_locked()
2333 	spin_lock(&cl->cl_lock);  in find_stateid_by_type()
2336 		if (typemask & s->sc_type)  in find_stateid_by_type()
2337 			refcount_inc(&s->sc_count);  in find_stateid_by_type()
2341 	spin_unlock(&cl->cl_lock);  in find_stateid_by_type()
2363 	struct inode *inode = m->private;  in client_info_show()
2369 		return -ENXIO;  in client_info_show()
2370 	memcpy(&clid, &clp->cl_clientid, sizeof(clid));  in client_info_show()
2372 	seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);  in client_info_show()
2374 	seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);  in client_info_show()
2375 	seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);  in client_info_show()
2376 	if (clp->cl_nii_domain.data) {  in client_info_show()
2378 		seq_quote_mem(m, clp->cl_nii_domain.data,  in client_info_show()
2379 					clp->cl_nii_domain.len);  in client_info_show()
2381 		seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);  in client_info_show()
2383 			clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);  in client_info_show()
2403 	__acquires(&clp->cl_lock)  in states_start()
2405 	struct nfs4_client *clp = s->private;  in states_start()
2409 	spin_lock(&clp->cl_lock);  in states_start()
2410 	ret = idr_get_next_ul(&clp->cl_stateids, &id);  in states_start()
2417 	struct nfs4_client *clp = s->private;  in states_next()
2423 	ret = idr_get_next_ul(&clp->cl_stateids, &id);  in states_next()
2429 	__releases(&clp->cl_lock)  in states_stop()
2431 	struct nfs4_client *clp = s->private;  in states_stop()
2433 	spin_unlock(&clp->cl_lock);  in states_stop()
2438          seq_printf(s, "filename: \"%pD2\"", f->nf_file);  in nfs4_show_fname()
2443 	struct inode *inode = f->nf_inode;  in nfs4_show_superblock()
2446 					MAJOR(inode->i_sb->s_dev),  in nfs4_show_superblock()
2447 					 MINOR(inode->i_sb->s_dev),  in nfs4_show_superblock()
2448 					 inode->i_ino);  in nfs4_show_superblock()
2454 	seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);  in nfs4_show_owner()
2459 	seq_printf(s, "0x%.8x", stid->si_generation);  in nfs4_show_stateid()
2460 	seq_printf(s, "%12phN", &stid->si_opaque);  in nfs4_show_stateid()
2471 	if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)  in nfs4_show_open()
2474 	oo = ols->st_stateowner;  in nfs4_show_open()
2475 	nf = st->sc_file;  in nfs4_show_open()
2477 	spin_lock(&nf->fi_lock);  in nfs4_show_open()
2482 	seq_printf(s, "- ");  in nfs4_show_open()
2483 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_open()
2486 	access = bmap_to_share_mode(ols->st_access_bmap);  in nfs4_show_open()
2487 	deny   = bmap_to_share_mode(ols->st_deny_bmap);  in nfs4_show_open()
2490 		access & NFS4_SHARE_ACCESS_READ ? "r" : "-",  in nfs4_show_open()
2491 		access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");  in nfs4_show_open()
2493 		deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",  in nfs4_show_open()
2494 		deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");  in nfs4_show_open()
2503 	spin_unlock(&nf->fi_lock);  in nfs4_show_open()
2515 	oo = ols->st_stateowner;  in nfs4_show_lock()
2516 	nf = st->sc_file;  in nfs4_show_lock()
2517 	spin_lock(&nf->fi_lock);  in nfs4_show_lock()
2522 	seq_printf(s, "- ");  in nfs4_show_lock()
2523 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_lock()
2541 	spin_unlock(&nf->fi_lock);  in nfs4_show_lock()
2552 	nf = st->sc_file;  in nfs4_show_deleg()
2553 	spin_lock(&nf->fi_lock);  in nfs4_show_deleg()
2558 	seq_printf(s, "- ");  in nfs4_show_deleg()
2559 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_deleg()
2564 		ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");  in nfs4_show_deleg()
2573 	spin_unlock(&nf->fi_lock);  in nfs4_show_deleg()
2583 	file = ls->ls_file;  in nfs4_show_layout()
2585 	seq_printf(s, "- ");  in nfs4_show_layout()
2586 	nfs4_show_stateid(s, &st->sc_stateid);  in nfs4_show_layout()
2603 	switch (st->sc_type) {  in states_show()
2633 		return -ENXIO;  in client_states_open()
2638 	s = file->private_data;  in client_states_open()
2639 	s->private = clp;  in client_states_open()
2645 	struct seq_file *m = file->private_data;  in client_opens_release()
2646 	struct nfs4_client *clp = m->private;  in client_opens_release()
2668 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in force_expire_client()
2671 	spin_lock(&nn->client_lock);  in force_expire_client()
2672 	clp->cl_time = 0;  in force_expire_client()
2673 	spin_unlock(&nn->client_lock);  in force_expire_client()
2675 	wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);  in force_expire_client()
2676 	spin_lock(&nn->client_lock);  in force_expire_client()
2677 	already_expired = list_empty(&clp->cl_lru);  in force_expire_client()
2680 	spin_unlock(&nn->client_lock);  in force_expire_client()
2685 		wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);  in force_expire_client()
2698 		return -EINVAL;  in client_ctl_write()
2701 		return -ENXIO;  in client_ctl_write()
2732 	ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);  in create_client()
2738 	kref_init(&clp->cl_nfsdfs.cl_ref);  in create_client()
2739 	nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);  in create_client()
2740 	clp->cl_time = ktime_get_boottime_seconds();  in create_client()
2741 	clear_bit(0, &clp->cl_cb_slot_busy);  in create_client()
2743 	memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));  in create_client()
2744 	clp->cl_cb_session = NULL;  in create_client()
2745 	clp->net = net;  in create_client()
2746 	clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs,  in create_client()
2747 			clp->cl_clientid.cl_id - nn->clientid_base,  in create_client()
2749 	if (!clp->cl_nfsd_dentry) {  in create_client()
2759 	struct rb_node **new = &(root->rb_node), *parent = NULL;  in add_clp_to_name_tree()
2766 		if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)  in add_clp_to_name_tree()
2767 			new = &((*new)->rb_left);  in add_clp_to_name_tree()
2769 			new = &((*new)->rb_right);  in add_clp_to_name_tree()
2772 	rb_link_node(&new_clp->cl_namenode, parent, new);  in add_clp_to_name_tree()
2773 	rb_insert_color(&new_clp->cl_namenode, root);  in add_clp_to_name_tree()
2780 	struct rb_node *node = root->rb_node;  in find_clp_in_name_tree()
2785 		cmp = compare_blob(&clp->cl_name, name);  in find_clp_in_name_tree()
2787 			node = node->rb_left;  in find_clp_in_name_tree()
2789 			node = node->rb_right;  in find_clp_in_name_tree()
2800 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in add_to_unconfirmed()
2802 	lockdep_assert_held(&nn->client_lock);  in add_to_unconfirmed()
2804 	clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);  in add_to_unconfirmed()
2805 	add_clp_to_name_tree(clp, &nn->unconf_name_tree);  in add_to_unconfirmed()
2806 	idhashval = clientid_hashval(clp->cl_clientid.cl_id);  in add_to_unconfirmed()
2807 	list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);  in add_to_unconfirmed()
2814 	unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);  in move_to_confirmed()
2815 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);  in move_to_confirmed()
2817 	lockdep_assert_held(&nn->client_lock);  in move_to_confirmed()
2820 	list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);  in move_to_confirmed()
2821 	rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);  in move_to_confirmed()
2822 	add_clp_to_name_tree(clp, &nn->conf_name_tree);  in move_to_confirmed()
2823 	set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);  in move_to_confirmed()
2831 	unsigned int idhashval = clientid_hashval(clid->cl_id);  in find_client_in_id_table()
2834 		if (same_clid(&clp->cl_clientid, clid)) {  in find_client_in_id_table()
2835 			if ((bool)clp->cl_minorversion != sessions)  in find_client_in_id_table()
2847 	struct list_head *tbl = nn->conf_id_hashtbl;  in find_confirmed_client()
2849 	lockdep_assert_held(&nn->client_lock);  in find_confirmed_client()
2856 	struct list_head *tbl = nn->unconf_id_hashtbl;  in find_unconfirmed_client()
2858 	lockdep_assert_held(&nn->client_lock);  in find_unconfirmed_client()
2864 	return clp->cl_exchange_flags != 0;  in clp_used_exchangeid()
2870 	lockdep_assert_held(&nn->client_lock);  in find_confirmed_client_by_name()
2871 	return find_clp_in_name_tree(name, &nn->conf_name_tree);  in find_confirmed_client_by_name()
2877 	lockdep_assert_held(&nn->client_lock);  in find_unconfirmed_client_by_name()
2878 	return find_clp_in_name_tree(name, &nn->unconf_name_tree);  in find_unconfirmed_client_by_name()
2884 	struct nfs4_cb_conn *conn = &clp->cl_cb_conn;  in gen_callback()
2890 	if (se->se_callback_netid_len == 3 &&  in gen_callback()
2891 	    !memcmp(se->se_callback_netid_val, "tcp", 3))  in gen_callback()
2893 	else if (se->se_callback_netid_len == 4 &&  in gen_callback()
2894 		 !memcmp(se->se_callback_netid_val, "tcp6", 4))  in gen_callback()
2899 	conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,  in gen_callback()
2900 					    se->se_callback_addr_len,  in gen_callback()
2901 					    (struct sockaddr *)&conn->cb_addr,  in gen_callback()
2902 					    sizeof(conn->cb_addr));  in gen_callback()
2904 	if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)  in gen_callback()
2907 	if (conn->cb_addr.ss_family == AF_INET6)  in gen_callback()
2908 		((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;  in gen_callback()
2910 	conn->cb_prog = se->se_callback_prog;  in gen_callback()
2911 	conn->cb_ident = se->se_callback_ident;  in gen_callback()
2912 	memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);  in gen_callback()
2916 	conn->cb_addr.ss_family = AF_UNSPEC;  in gen_callback()
2917 	conn->cb_addrlen = 0;  in gen_callback()
2928 	struct xdr_buf *buf = resp->xdr.buf;  in nfsd4_store_cache_entry()
2929 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_store_cache_entry()
2932 	dprintk("--> %s slot %p\n", __func__, slot);  in nfsd4_store_cache_entry()
2934 	slot->sl_flags |= NFSD4_SLOT_INITIALIZED;  in nfsd4_store_cache_entry()
2935 	slot->sl_opcnt = resp->opcnt;  in nfsd4_store_cache_entry()
2936 	slot->sl_status = resp->cstate.status;  in nfsd4_store_cache_entry()
2937 	free_svc_cred(&slot->sl_cred);  in nfsd4_store_cache_entry()
2938 	copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred);  in nfsd4_store_cache_entry()
2941 		slot->sl_flags &= ~NFSD4_SLOT_CACHED;  in nfsd4_store_cache_entry()
2944 	slot->sl_flags |= NFSD4_SLOT_CACHED;  in nfsd4_store_cache_entry()
2946 	base = resp->cstate.data_offset;  in nfsd4_store_cache_entry()
2947 	slot->sl_datalen = buf->len - base;  in nfsd4_store_cache_entry()
2948 	if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))  in nfsd4_store_cache_entry()
2957  * operation which sets resp->p and increments resp->opcnt for
2966 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_enc_sequence_replay()
2969 	op = &args->ops[resp->opcnt - 1];  in nfsd4_enc_sequence_replay()
2972 	if (slot->sl_flags & NFSD4_SLOT_CACHED)  in nfsd4_enc_sequence_replay()
2973 		return op->status;  in nfsd4_enc_sequence_replay()
2974 	if (args->opcnt == 1) {  in nfsd4_enc_sequence_replay()
2976 		 * The original operation wasn't a solo sequence--we  in nfsd4_enc_sequence_replay()
2977 		 * always cache those--so this retry must not match the  in nfsd4_enc_sequence_replay()
2980 		op->status = nfserr_seq_false_retry;  in nfsd4_enc_sequence_replay()
2982 		op = &args->ops[resp->opcnt++];  in nfsd4_enc_sequence_replay()
2983 		op->status = nfserr_retry_uncached_rep;  in nfsd4_enc_sequence_replay()
2986 	return op->status;  in nfsd4_enc_sequence_replay()
2997 	struct nfsd4_slot *slot = resp->cstate.slot;  in nfsd4_replay_cache_entry()
2998 	struct xdr_stream *xdr = &resp->xdr;  in nfsd4_replay_cache_entry()
3002 	dprintk("--> %s slot %p\n", __func__, slot);  in nfsd4_replay_cache_entry()
3004 	status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);  in nfsd4_replay_cache_entry()
3008 	p = xdr_reserve_space(xdr, slot->sl_datalen);  in nfsd4_replay_cache_entry()
3013 	xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);  in nfsd4_replay_cache_entry()
3016 	resp->opcnt = slot->sl_opcnt;  in nfsd4_replay_cache_entry()
3017 	return slot->sl_status;  in nfsd4_replay_cache_entry()
3027 	new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;  in nfsd4_set_ex_flags()
3029 	new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;  in nfsd4_set_ex_flags()
3033 	new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;  in nfsd4_set_ex_flags()
3036 	clid->flags = new->cl_exchange_flags;  in nfsd4_set_ex_flags()
3043 	list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {  in client_has_openowners()
3044 		if (!list_empty(&oo->oo_owner.so_stateids))  in client_has_openowners()
3054 		|| !list_empty(&clp->cl_lo_states)  in client_has_state()
3056 		|| !list_empty(&clp->cl_delegations)  in client_has_state()
3057 		|| !list_empty(&clp->cl_sessions)  in client_has_state()
3058 		|| !list_empty(&clp->async_copies);  in client_has_state()
3064 	if (!exid->nii_domain.data)  in copy_impl_id()
3066 	xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);  in copy_impl_id()
3067 	if (!clp->cl_nii_domain.data)  in copy_impl_id()
3069 	xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);  in copy_impl_id()
3070 	if (!clp->cl_nii_name.data)  in copy_impl_id()
3072 	clp->cl_nii_time = exid->nii_time;  in copy_impl_id()
3080 	struct nfsd4_exchange_id *exid = &u->exchange_id;  in nfsd4_exchange_id()
3085 	nfs4_verifier		verf = exid->verifier;  in nfsd4_exchange_id()
3087 	bool	update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;  in nfsd4_exchange_id()
3093 		__func__, rqstp, exid, exid->clname.len, exid->clname.data,  in nfsd4_exchange_id()
3094 		addr_str, exid->flags, exid->spa_how);  in nfsd4_exchange_id()
3096 	if (exid->flags & ~EXCHGID4_FLAG_MASK_A)  in nfsd4_exchange_id()
3099 	new = create_client(exid->clname, rqstp, &verf);  in nfsd4_exchange_id()
3106 	switch (exid->spa_how) {  in nfsd4_exchange_id()
3108 		exid->spo_must_enforce[0] = 0;  in nfsd4_exchange_id()
3109 		exid->spo_must_enforce[1] = (  in nfsd4_exchange_id()
3110 			1 << (OP_BIND_CONN_TO_SESSION - 32) |  in nfsd4_exchange_id()
3111 			1 << (OP_EXCHANGE_ID - 32) |  in nfsd4_exchange_id()
3112 			1 << (OP_CREATE_SESSION - 32) |  in nfsd4_exchange_id()
3113 			1 << (OP_DESTROY_SESSION - 32) |  in nfsd4_exchange_id()
3114 			1 << (OP_DESTROY_CLIENTID - 32));  in nfsd4_exchange_id()
3116 		exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |  in nfsd4_exchange_id()
3121 		exid->spo_must_allow[1] &= (  in nfsd4_exchange_id()
3122 					1 << (OP_TEST_STATEID - 32) |  in nfsd4_exchange_id()
3123 					1 << (OP_FREE_STATEID - 32));  in nfsd4_exchange_id()
3133 		if (!new->cl_cred.cr_principal &&  in nfsd4_exchange_id()
3134 					!new->cl_cred.cr_raw_principal) {  in nfsd4_exchange_id()
3138 		new->cl_mach_cred = true;  in nfsd4_exchange_id()
3150 	spin_lock(&nn->client_lock);  in nfsd4_exchange_id()
3151 	conf = find_confirmed_client_by_name(&exid->clname, nn);  in nfsd4_exchange_id()
3153 		bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);  in nfsd4_exchange_id()
3154 		bool verfs_match = same_verf(&verf, &conf->cl_verifier);  in nfsd4_exchange_id()
3174 			exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;  in nfsd4_exchange_id()
3185 			conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;  in nfsd4_exchange_id()
3198 	unconf  = find_unconfirmed_client_by_name(&exid->clname, nn);  in nfsd4_exchange_id()
3209 	new->cl_minorversion = cstate->minorversion;  in nfsd4_exchange_id()
3210 	new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];  in nfsd4_exchange_id()
3211 	new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];  in nfsd4_exchange_id()
3216 	exid->clientid.cl_boot = conf->cl_clientid.cl_boot;  in nfsd4_exchange_id()
3217 	exid->clientid.cl_id = conf->cl_clientid.cl_id;  in nfsd4_exchange_id()
3219 	exid->seqid = conf->cl_cs_slot.sl_seqid + 1;  in nfsd4_exchange_id()
3223 		conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);  in nfsd4_exchange_id()
3227 	spin_unlock(&nn->client_lock);  in nfsd4_exchange_id()
3249 	/* Note unsigned 32-bit arithmetic handles wraparound: */  in check_slot_seqid()
3260  * Do this for solo or embedded create session operations.
3266 	slot->sl_status = nfserr;  in nfsd4_cache_create_session()
3267 	memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));  in nfsd4_cache_create_session()
3274 	memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));  in nfsd4_replay_create_session()
3275 	return slot->sl_status;  in nfsd4_replay_create_session()
3297 	u32 maxrpc = nn->nfsd_serv->sv_max_mesg;  in check_forechannel_attrs()
3299 	if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)  in check_forechannel_attrs()
3301 	if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)  in check_forechannel_attrs()
3303 	ca->headerpadsz = 0;  in check_forechannel_attrs()
3304 	ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);  in check_forechannel_attrs()
3305 	ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);  in check_forechannel_attrs()
3306 	ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);  in check_forechannel_attrs()
3307 	ca->maxresp_cached = min_t(u32, ca->maxresp_cached,  in check_forechannel_attrs()
3309 	ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);  in check_forechannel_attrs()
3320 	ca->maxreqs = nfsd4_get_drc_mem(ca, nn);  in check_forechannel_attrs()
3326  * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
3343 	ca->headerpadsz = 0;  in check_backchannel_attrs()
3345 	if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)  in check_backchannel_attrs()
3347 	if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)  in check_backchannel_attrs()
3349 	ca->maxresp_cached = 0;  in check_backchannel_attrs()
3350 	if (ca->maxops < 2)  in check_backchannel_attrs()
3358 	switch (cbs->flavor) {  in nfsd4_check_cb_sec()
3378 	struct nfsd4_create_session *cr_ses = &u->create_session;  in nfsd4_create_session()
3388 	if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)  in nfsd4_create_session()
3390 	status = nfsd4_check_cb_sec(&cr_ses->cb_sec);  in nfsd4_create_session()
3393 	status = check_forechannel_attrs(&cr_ses->fore_channel, nn);  in nfsd4_create_session()
3396 	status = check_backchannel_attrs(&cr_ses->back_channel);  in nfsd4_create_session()
3400 	new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);  in nfsd4_create_session()
3407 	spin_lock(&nn->client_lock);  in nfsd4_create_session()
3408 	unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);  in nfsd4_create_session()
3409 	conf = find_confirmed_client(&cr_ses->clientid, true, nn);  in nfsd4_create_session()
3416 		cs_slot = &conf->cl_cs_slot;  in nfsd4_create_session()
3417 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);  in nfsd4_create_session()
3424 		if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||  in nfsd4_create_session()
3425 		    !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {  in nfsd4_create_session()
3432 		cs_slot = &unconf->cl_cs_slot;  in nfsd4_create_session()
3433 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);  in nfsd4_create_session()
3439 		old = find_confirmed_client_by_name(&unconf->cl_name, nn);  in nfsd4_create_session()
3455 	cr_ses->flags &= ~SESSION4_PERSIST;  in nfsd4_create_session()
3457 	cr_ses->flags &= ~SESSION4_RDMA;  in nfsd4_create_session()
3462 	memcpy(cr_ses->sessionid.data, new->se_sessionid.data,  in nfsd4_create_session()
3464 	cs_slot->sl_seqid++;  in nfsd4_create_session()
3465 	cr_ses->seqid = cs_slot->sl_seqid;  in nfsd4_create_session()
3467 	/* cache solo and embedded create sessions under the client_lock */  in nfsd4_create_session()
3469 	spin_unlock(&nn->client_lock);  in nfsd4_create_session()
3477 	spin_unlock(&nn->client_lock);  in nfsd4_create_session()
3484 	nfsd4_put_drc_mem(&cr_ses->fore_channel);  in nfsd4_create_session()
3506 	struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;  in nfsd4_backchannel_ctl()
3507 	struct nfsd4_session *session = cstate->session;  in nfsd4_backchannel_ctl()
3511 	status = nfsd4_check_cb_sec(&bc->bc_cb_sec);  in nfsd4_backchannel_ctl()
3514 	spin_lock(&nn->client_lock);  in nfsd4_backchannel_ctl()
3515 	session->se_cb_prog = bc->bc_cb_program;  in nfsd4_backchannel_ctl()
3516 	session->se_cb_sec = bc->bc_cb_sec;  in nfsd4_backchannel_ctl()
3517 	spin_unlock(&nn->client_lock);  in nfsd4_backchannel_ctl()
3519 	nfsd4_probe_callback(session->se_client);  in nfsd4_backchannel_ctl()
3528 	list_for_each_entry(c, &s->se_conns, cn_persession) {  in __nfsd4_find_conn()
3529 		if (c->cn_xprt == xpt) {  in __nfsd4_find_conn()
3539 	struct nfs4_client *clp = session->se_client;  in nfsd4_match_existing_connection()
3540 	struct svc_xprt *xpt = rqst->rq_xprt;  in nfsd4_match_existing_connection()
3545 	spin_lock(&clp->cl_lock);  in nfsd4_match_existing_connection()
3549 	else if (req == c->cn_flags)  in nfsd4_match_existing_connection()
3552 				c->cn_flags != NFS4_CDFC4_BACK)  in nfsd4_match_existing_connection()
3555 				c->cn_flags != NFS4_CDFC4_FORE)  in nfsd4_match_existing_connection()
3559 	spin_unlock(&clp->cl_lock);  in nfsd4_match_existing_connection()
3569 	struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;  in nfsd4_bind_conn_to_session()
3578 	spin_lock(&nn->client_lock);  in nfsd4_bind_conn_to_session()
3579 	session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);  in nfsd4_bind_conn_to_session()
3580 	spin_unlock(&nn->client_lock);  in nfsd4_bind_conn_to_session()
3584 	if (!nfsd4_mach_creds_match(session->se_client, rqstp))  in nfsd4_bind_conn_to_session()
3587 			bcts->dir, &conn);  in nfsd4_bind_conn_to_session()
3589 		if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH ||  in nfsd4_bind_conn_to_session()
3590 				bcts->dir == NFS4_CDFC4_BACK)  in nfsd4_bind_conn_to_session()
3591 			conn->cn_flags |= NFS4_CDFC4_BACK;  in nfsd4_bind_conn_to_session()
3592 		nfsd4_probe_callback(session->se_client);  in nfsd4_bind_conn_to_session()
3597 	status = nfsd4_map_bcts_dir(&bcts->dir);  in nfsd4_bind_conn_to_session()
3600 	conn = alloc_conn(rqstp, bcts->dir);  in nfsd4_bind_conn_to_session()
3614 	if (!cstate->session)  in nfsd4_compound_in_session()
3616 	return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid));  in nfsd4_compound_in_session()
3623 	struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid;  in nfsd4_destroy_session()
3637 	spin_lock(&nn->client_lock);  in nfsd4_destroy_session()
3642 	if (!nfsd4_mach_creds_match(ses->se_client, r))  in nfsd4_destroy_session()
3648 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_session()
3650 	nfsd4_probe_callback_sync(ses->se_client);  in nfsd4_destroy_session()
3652 	spin_lock(&nn->client_lock);  in nfsd4_destroy_session()
3657 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_session()
3664 	struct nfs4_client *clp = ses->se_client;  in nfsd4_sequence_check_conn()
3669 	spin_lock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3670 	c = __nfsd4_find_conn(new->cn_xprt, ses);  in nfsd4_sequence_check_conn()
3674 	if (clp->cl_mach_cred)  in nfsd4_sequence_check_conn()
3677 	spin_unlock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3681 		nfsd4_conn_lost(&new->cn_xpt_user);  in nfsd4_sequence_check_conn()
3684 	spin_unlock(&clp->cl_lock);  in nfsd4_sequence_check_conn()
3691 	struct nfsd4_compoundargs *args = rqstp->rq_argp;  in nfsd4_session_too_many_ops()
3693 	return args->opcnt > session->se_fchannel.maxops;  in nfsd4_session_too_many_ops()
3699 	struct xdr_buf *xb = &rqstp->rq_arg;  in nfsd4_request_too_big()
3701 	return xb->len > session->se_fchannel.maxreq_sz;  in nfsd4_request_too_big()
3707 	struct nfsd4_compoundargs *argp = rqstp->rq_argp;  in replay_matches_cache()
3709 	if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) !=  in replay_matches_cache()
3710 	    (bool)seq->cachethis)  in replay_matches_cache()
3716 	if (slot->sl_opcnt < argp->opcnt && !slot->sl_status)  in replay_matches_cache()
3723 	if (slot->sl_opcnt > argp->opcnt)  in replay_matches_cache()
3726 	if (!same_creds(&rqstp->rq_cred, &slot->sl_cred))  in replay_matches_cache()
3741 	struct nfsd4_sequence *seq = &u->sequence;  in nfsd4_sequence()
3742 	struct nfsd4_compoundres *resp = rqstp->rq_resp;  in nfsd4_sequence()
3743 	struct xdr_stream *xdr = &resp->xdr;  in nfsd4_sequence()
3753 	if (resp->opcnt != 1)  in nfsd4_sequence()
3764 	spin_lock(&nn->client_lock);  in nfsd4_sequence()
3765 	session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);  in nfsd4_sequence()
3768 	clp = session->se_client;  in nfsd4_sequence()
3779 	if (seq->slotid >= session->se_fchannel.maxreqs)  in nfsd4_sequence()
3782 	slot = session->se_slots[seq->slotid];  in nfsd4_sequence()
3783 	dprintk("%s: slotid %d\n", __func__, seq->slotid);  in nfsd4_sequence()
3788 	seq->maxslots = session->se_fchannel.maxreqs;  in nfsd4_sequence()
3790 	status = check_slot_seqid(seq->seqid, slot->sl_seqid,  in nfsd4_sequence()
3791 					slot->sl_flags & NFSD4_SLOT_INUSE);  in nfsd4_sequence()
3794 		if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))  in nfsd4_sequence()
3799 		cstate->slot = slot;  in nfsd4_sequence()
3800 		cstate->session = session;  in nfsd4_sequence()
3801 		cstate->clp = clp;  in nfsd4_sequence()
3802 		/* Return the cached reply status and set cstate->status  in nfsd4_sequence()
3805 		cstate->status = nfserr_replay_cache;  in nfsd4_sequence()
3816 	buflen = (seq->cachethis) ?  in nfsd4_sequence()
3817 			session->se_fchannel.maxresp_cached :  in nfsd4_sequence()
3818 			session->se_fchannel.maxresp_sz;  in nfsd4_sequence()
3819 	status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :  in nfsd4_sequence()
3821 	if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))  in nfsd4_sequence()
3827 	slot->sl_seqid = seq->seqid;  in nfsd4_sequence()
3828 	slot->sl_flags |= NFSD4_SLOT_INUSE;  in nfsd4_sequence()
3829 	if (seq->cachethis)  in nfsd4_sequence()
3830 		slot->sl_flags |= NFSD4_SLOT_CACHETHIS;  in nfsd4_sequence()
3832 		slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;  in nfsd4_sequence()
3834 	cstate->slot = slot;  in nfsd4_sequence()
3835 	cstate->session = session;  in nfsd4_sequence()
3836 	cstate->clp = clp;  in nfsd4_sequence()
3839 	switch (clp->cl_cb_state) {  in nfsd4_sequence()
3841 		seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;  in nfsd4_sequence()
3844 		seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;  in nfsd4_sequence()
3847 		seq->status_flags = 0;  in nfsd4_sequence()
3849 	if (!list_empty(&clp->cl_revoked))  in nfsd4_sequence()
3850 		seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;  in nfsd4_sequence()
3854 	spin_unlock(&nn->client_lock);  in nfsd4_sequence()
3864 	struct nfsd4_compound_state *cs = &resp->cstate;  in nfsd4_sequence_done()
3867 		if (cs->status != nfserr_replay_cache) {  in nfsd4_sequence_done()
3869 			cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;  in nfsd4_sequence_done()
3872 		nfsd4_put_session(cs->session);  in nfsd4_sequence_done()
3873 	} else if (cs->clp)  in nfsd4_sequence_done()
3874 		put_client_renew(cs->clp);  in nfsd4_sequence_done()
3882 	struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;  in nfsd4_destroy_clientid()
3888 	spin_lock(&nn->client_lock);  in nfsd4_destroy_clientid()
3889 	unconf = find_unconfirmed_client(&dc->clientid, true, nn);  in nfsd4_destroy_clientid()
3890 	conf = find_confirmed_client(&dc->clientid, true, nn);  in nfsd4_destroy_clientid()
3915 	spin_unlock(&nn->client_lock);  in nfsd4_destroy_clientid()
3925 	struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;  in nfsd4_reclaim_complete()
3928 	if (rc->rca_one_fs) {  in nfsd4_reclaim_complete()
3929 		if (!cstate->current_fh.fh_dentry)  in nfsd4_reclaim_complete()
3940 			     &cstate->session->se_client->cl_flags))  in nfsd4_reclaim_complete()
3944 	if (is_client_expired(cstate->session->se_client))  in nfsd4_reclaim_complete()
3955 	nfsd4_client_record_create(cstate->session->se_client);  in nfsd4_reclaim_complete()
3956 	inc_reclaim_complete(cstate->session->se_client);  in nfsd4_reclaim_complete()
3965 	struct nfsd4_setclientid *setclid = &u->setclientid;  in nfsd4_setclientid()
3966 	struct xdr_netobj 	clname = setclid->se_name;  in nfsd4_setclientid()
3967 	nfs4_verifier		clverifier = setclid->se_verf;  in nfsd4_setclientid()
3977 	spin_lock(&nn->client_lock);  in nfsd4_setclientid()
3984 		if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {  in nfsd4_setclientid()
3993 	if (conf && same_verf(&conf->cl_verifier, &clverifier)) {  in nfsd4_setclientid()
3997 	new->cl_minorversion = 0;  in nfsd4_setclientid()
4000 	setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;  in nfsd4_setclientid()
4001 	setclid->se_clientid.cl_id = new->cl_clientid.cl_id;  in nfsd4_setclientid()
4002 	memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));  in nfsd4_setclientid()
4006 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid()
4021 			&u->setclientid_confirm;  in nfsd4_setclientid_confirm()
4024 	nfs4_verifier confirm = setclientid_confirm->sc_confirm;   in nfsd4_setclientid_confirm()
4025 	clientid_t * clid = &setclientid_confirm->sc_clientid;  in nfsd4_setclientid_confirm()
4032 	spin_lock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4043 	if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))  in nfsd4_setclientid_confirm()
4045 	if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))  in nfsd4_setclientid_confirm()
4048 	if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {  in nfsd4_setclientid_confirm()
4049 		if (conf && same_verf(&confirm, &conf->cl_confirm)) {  in nfsd4_setclientid_confirm()
4060 		nfsd4_change_callback(conf, &unconf->cl_cb_conn);  in nfsd4_setclientid_confirm()
4062 		old = find_confirmed_client_by_name(&unconf->cl_name, nn);  in nfsd4_setclientid_confirm()
4066 					&& !same_creds(&unconf->cl_cred,  in nfsd4_setclientid_confirm()
4067 							&old->cl_cred)) {  in nfsd4_setclientid_confirm()
4081 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4083 	spin_lock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4086 	spin_unlock(&nn->client_lock);  in nfsd4_setclientid_confirm()
4103 	refcount_set(&fp->fi_ref, 1);  in nfsd4_init_file()
4104 	spin_lock_init(&fp->fi_lock);  in nfsd4_init_file()
4105 	INIT_LIST_HEAD(&fp->fi_stateids);  in nfsd4_init_file()
4106 	INIT_LIST_HEAD(&fp->fi_delegations);  in nfsd4_init_file()
4107 	INIT_LIST_HEAD(&fp->fi_clnt_odstate);  in nfsd4_init_file()
4108 	fh_copy_shallow(&fp->fi_fhandle, fh);  in nfsd4_init_file()
4109 	fp->fi_deleg_file = NULL;  in nfsd4_init_file()
4110 	fp->fi_had_conflict = false;  in nfsd4_init_file()
4111 	fp->fi_share_deny = 0;  in nfsd4_init_file()
4112 	memset(fp->fi_fds, 0, sizeof(fp->fi_fds));  in nfsd4_init_file()
4113 	memset(fp->fi_access, 0, sizeof(fp->fi_access));  in nfsd4_init_file()
4115 	INIT_LIST_HEAD(&fp->fi_lo_states);  in nfsd4_init_file()
4116 	atomic_set(&fp->fi_lo_recalls, 0);  in nfsd4_init_file()
4118 	hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);  in nfsd4_init_file()
4179 	return -ENOMEM;  in nfsd4_init_slabs()
4184 	rp->rp_status = nfserr_serverfault;  in init_nfs4_replay()
4185 	rp->rp_buflen = 0;  in init_nfs4_replay()
4186 	rp->rp_buf = rp->rp_ibuf;  in init_nfs4_replay()
4187 	mutex_init(&rp->rp_mutex);  in init_nfs4_replay()
4194 		mutex_lock(&so->so_replay.rp_mutex);  in nfsd4_cstate_assign_replay()
4195 		cstate->replay_owner = nfs4_get_stateowner(so);  in nfsd4_cstate_assign_replay()
4201 	struct nfs4_stateowner *so = cstate->replay_owner;  in nfsd4_cstate_clear_replay()
4204 		cstate->replay_owner = NULL;  in nfsd4_cstate_clear_replay()
4205 		mutex_unlock(&so->so_replay.rp_mutex);  in nfsd4_cstate_clear_replay()
4218 	xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);  in alloc_stateowner()
4219 	if (!sop->so_owner.data) {  in alloc_stateowner()
4224 	INIT_LIST_HEAD(&sop->so_stateids);  in alloc_stateowner()
4225 	sop->so_client = clp;  in alloc_stateowner()
4226 	init_nfs4_replay(&sop->so_replay);  in alloc_stateowner()
4227 	atomic_set(&sop->so_count, 1);  in alloc_stateowner()
4233 	lockdep_assert_held(&clp->cl_lock);  in hash_openowner()
4235 	list_add(&oo->oo_owner.so_strhash,  in hash_openowner()
4236 		 &clp->cl_ownerstr_hashtbl[strhashval]);  in hash_openowner()
4237 	list_add(&oo->oo_perclient, &clp->cl_openowners);  in hash_openowner()
4261 	struct nfs4_openowner *oo = open->op_openowner;  in nfsd4_find_existing_open()
4263 	lockdep_assert_held(&fp->fi_lock);  in nfsd4_find_existing_open()
4265 	list_for_each_entry(local, &fp->fi_stateids, st_perfile) {  in nfsd4_find_existing_open()
4267 		if (local->st_stateowner->so_is_open_owner == 0)  in nfsd4_find_existing_open()
4269 		if (local->st_stateowner != &oo->oo_owner)  in nfsd4_find_existing_open()
4271 		if (local->st_stid.sc_type == NFS4_OPEN_STID) {  in nfsd4_find_existing_open()
4273 			refcount_inc(&ret->st_stid.sc_count);  in nfsd4_find_existing_open()
4285 	switch (s->sc_type) {  in nfsd4_verify_open_stid()
4305 	mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX);  in nfsd4_lock_ol_stateid()
4306 	ret = nfsd4_verify_open_stid(&stp->st_stid);  in nfsd4_lock_ol_stateid()
4308 		mutex_unlock(&stp->st_mutex);  in nfsd4_lock_ol_stateid()
4317 		spin_lock(&fp->fi_lock);  in nfsd4_find_and_lock_existing_open()
4319 		spin_unlock(&fp->fi_lock);  in nfsd4_find_and_lock_existing_open()
4322 		nfs4_put_stid(&stp->st_stid);  in nfsd4_find_and_lock_existing_open()
4331 	struct nfs4_client *clp = cstate->clp;  in alloc_init_open_stateowner()
4334 	oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);  in alloc_init_open_stateowner()
4337 	oo->oo_owner.so_ops = &openowner_ops;  in alloc_init_open_stateowner()
4338 	oo->oo_owner.so_is_open_owner = 1;  in alloc_init_open_stateowner()
4339 	oo->oo_owner.so_seqid = open->op_seqid;  in alloc_init_open_stateowner()
4340 	oo->oo_flags = 0;  in alloc_init_open_stateowner()
4342 		oo->oo_flags |= NFS4_OO_CONFIRMED;  in alloc_init_open_stateowner()
4343 	oo->oo_time = 0;  in alloc_init_open_stateowner()
4344 	oo->oo_last_closed_stid = NULL;  in alloc_init_open_stateowner()
4345 	INIT_LIST_HEAD(&oo->oo_close_lru);  in alloc_init_open_stateowner()
4346 	spin_lock(&clp->cl_lock);  in alloc_init_open_stateowner()
4352 		nfs4_free_stateowner(&oo->oo_owner);  in alloc_init_open_stateowner()
4354 	spin_unlock(&clp->cl_lock);  in alloc_init_open_stateowner()
4362 	struct nfs4_openowner *oo = open->op_openowner;  in init_open_stateid()
4366 	stp = open->op_stp;  in init_open_stateid()
4368 	mutex_init(&stp->st_mutex);  in init_open_stateid()
4369 	mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);  in init_open_stateid()
4372 	spin_lock(&oo->oo_owner.so_client->cl_lock);  in init_open_stateid()
4373 	spin_lock(&fp->fi_lock);  in init_open_stateid()
4379 	open->op_stp = NULL;  in init_open_stateid()
4380 	refcount_inc(&stp->st_stid.sc_count);  in init_open_stateid()
4381 	stp->st_stid.sc_type = NFS4_OPEN_STID;  in init_open_stateid()
4382 	INIT_LIST_HEAD(&stp->st_locks);  in init_open_stateid()
4383 	stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);  in init_open_stateid()
4385 	stp->st_stid.sc_file = fp;  in init_open_stateid()
4386 	stp->st_access_bmap = 0;  in init_open_stateid()
4387 	stp->st_deny_bmap = 0;  in init_open_stateid()
4388 	stp->st_openstp = NULL;  in init_open_stateid()
4389 	list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);  in init_open_stateid()
4390 	list_add(&stp->st_perfile, &fp->fi_stateids);  in init_open_stateid()
4393 	spin_unlock(&fp->fi_lock);  in init_open_stateid()
4394 	spin_unlock(&oo->oo_owner.so_client->cl_lock);  in init_open_stateid()
4398 			nfs4_put_stid(&retstp->st_stid);  in init_open_stateid()
4402 		mutex_unlock(&stp->st_mutex);  in init_open_stateid()
4417 	struct nfs4_openowner *oo = openowner(s->st_stateowner);  in move_to_close_lru()
4418 	struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,  in move_to_close_lru()
4432 	wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2);  in move_to_close_lru()
4435 	if (s->st_stid.sc_file) {  in move_to_close_lru()
4436 		put_nfs4_file(s->st_stid.sc_file);  in move_to_close_lru()
4437 		s->st_stid.sc_file = NULL;  in move_to_close_lru()
4440 	spin_lock(&nn->client_lock);  in move_to_close_lru()
4441 	last = oo->oo_last_closed_stid;  in move_to_close_lru()
4442 	oo->oo_last_closed_stid = s;  in move_to_close_lru()
4443 	list_move_tail(&oo->oo_close_lru, &nn->close_lru);  in move_to_close_lru()
4444 	oo->oo_time = ktime_get_boottime_seconds();  in move_to_close_lru()
4445 	spin_unlock(&nn->client_lock);  in move_to_close_lru()
4447 		nfs4_put_stid(&last->st_stid);  in move_to_close_lru()
4458 		if (fh_match(&fp->fi_fhandle, fh)) {  in find_file_locked()
4459 			if (refcount_inc_not_zero(&fp->fi_ref))  in find_file_locked()
4511 	fp = find_file(&current_fh->fh_handle);  in nfs4_share_conflict()
4515 	spin_lock(&fp->fi_lock);  in nfs4_share_conflict()
4516 	if (fp->fi_share_deny & deny_type)  in nfs4_share_conflict()
4518 	spin_unlock(&fp->fi_lock);  in nfs4_share_conflict()
4526 	struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,  in nfsd4_cb_recall_prepare()
4529 	block_delegations(&dp->dl_stid.sc_file->fi_fhandle);  in nfsd4_cb_recall_prepare()
4533 	 * already holding inode->i_lock.  in nfsd4_cb_recall_prepare()
4539 	if (delegation_hashed(dp) && dp->dl_time == 0) {  in nfsd4_cb_recall_prepare()
4540 		dp->dl_time = ktime_get_boottime_seconds();  in nfsd4_cb_recall_prepare()
4541 		list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);  in nfsd4_cb_recall_prepare()
4551 	if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID ||  in nfsd4_cb_recall_done()
4552 	    dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID)  in nfsd4_cb_recall_done()
4555 	switch (task->tk_status) {  in nfsd4_cb_recall_done()
4558 	case -NFS4ERR_DELAY:  in nfsd4_cb_recall_done()
4561 	case -EBADHANDLE:  in nfsd4_cb_recall_done()
4562 	case -NFS4ERR_BAD_STATEID:  in nfsd4_cb_recall_done()
4567 		if (dp->dl_retries--) {  in nfsd4_cb_recall_done()
4581 	nfs4_put_stid(&dp->dl_stid);  in nfsd4_cb_recall_release()
4599 	refcount_inc(&dp->dl_stid.sc_count);  in nfsd_break_one_deleg()
4600 	nfsd4_run_cb(&dp->dl_recall);  in nfsd_break_one_deleg()
4608 	struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;  in nfsd_break_deleg_cb()
4609 	struct nfs4_file *fp = dp->dl_stid.sc_file;  in nfsd_break_deleg_cb()
4611 	trace_nfsd_deleg_break(&dp->dl_stid.sc_stateid);  in nfsd_break_deleg_cb()
4618 	fl->fl_break_time = 0;  in nfsd_break_deleg_cb()
4620 	spin_lock(&fp->fi_lock);  in nfsd_break_deleg_cb()
4621 	fp->fi_had_conflict = true;  in nfsd_break_deleg_cb()
4623 	spin_unlock(&fp->fi_lock);  in nfsd_break_deleg_cb()
4628  * nfsd_breaker_owns_lease - Check if lease conflict was resolved
4637 	struct nfs4_delegation *dl = fl->fl_owner;  in nfsd_breaker_owns_lease()
4645 	if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4)  in nfsd_breaker_owns_lease()
4647 	clp = *(rqst->rq_lease_breaker);  in nfsd_breaker_owns_lease()
4648 	return dl->dl_stid.sc_client == clp;  in nfsd_breaker_owns_lease()
4658 		return -EAGAIN;  in nfsd_change_deleg_cb()
4671 	if (seqid == so->so_seqid - 1)  in nfsd4_check_seqid()
4673 	if (seqid == so->so_seqid)  in nfsd4_check_seqid()
4685 	if (cstate->clp) {  in lookup_clientid()
4686 		found = cstate->clp;  in lookup_clientid()
4687 		if (!same_clid(&found->cl_clientid, clid))  in lookup_clientid()
4700 	WARN_ON_ONCE(cstate->session);  in lookup_clientid()
4701 	spin_lock(&nn->client_lock);  in lookup_clientid()
4704 		spin_unlock(&nn->client_lock);  in lookup_clientid()
4707 	atomic_inc(&found->cl_rpc_users);  in lookup_clientid()
4708 	spin_unlock(&nn->client_lock);  in lookup_clientid()
4711 	cstate->clp = found;  in lookup_clientid()
4719 	clientid_t *clientid = &open->op_clientid;  in nfsd4_process_open1()
4725 	if (STALE_CLIENTID(&open->op_clientid, nn))  in nfsd4_process_open1()
4731 	open->op_file = nfsd4_alloc_file();  in nfsd4_process_open1()
4732 	if (open->op_file == NULL)  in nfsd4_process_open1()
4738 	clp = cstate->clp;  in nfsd4_process_open1()
4740 	strhashval = ownerstr_hashval(&open->op_owner);  in nfsd4_process_open1()
4742 	open->op_openowner = oo;  in nfsd4_process_open1()
4746 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {  in nfsd4_process_open1()
4749 		open->op_openowner = NULL;  in nfsd4_process_open1()
4752 	status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);  in nfsd4_process_open1()
4760 	open->op_openowner = oo;  in nfsd4_process_open1()
4762 	open->op_stp = nfs4_alloc_open_stateid(clp);  in nfsd4_process_open1()
4763 	if (!open->op_stp)  in nfsd4_process_open1()
4767 	    (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {  in nfsd4_process_open1()
4768 		open->op_odstate = alloc_clnt_odstate(clp);  in nfsd4_process_open1()
4769 		if (!open->op_odstate)  in nfsd4_process_open1()
4779 	if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))  in nfs4_check_delegmode()
4803 	return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||  in nfsd4_is_deleg_cur()
4804 	       open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;  in nfsd4_is_deleg_cur()
4815 	deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);  in nfs4_check_deleg()
4818 	if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) {  in nfs4_check_deleg()
4819 		nfs4_put_stid(&deleg->dl_stid);  in nfs4_check_deleg()
4820 		if (cl->cl_minorversion)  in nfs4_check_deleg()
4824 	flags = share_access_to_flags(open->op_share_access);  in nfs4_check_deleg()
4827 		nfs4_put_stid(&deleg->dl_stid);  in nfs4_check_deleg()
4836 	open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;  in nfs4_check_deleg()
4859 	if (!open->op_truncate)  in nfsd4_truncate()
4861 	if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))  in nfsd4_truncate()
4872 	int oflag = nfs4_access_to_omode(open->op_share_access);  in nfs4_get_vfs_file()
4873 	int access = nfs4_access_to_access(open->op_share_access);  in nfs4_get_vfs_file()
4876 	spin_lock(&fp->fi_lock);  in nfs4_get_vfs_file()
4882 	status = nfs4_file_check_deny(fp, open->op_share_deny);  in nfs4_get_vfs_file()
4884 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
4889 	status = nfs4_file_get_access(fp, open->op_share_access);  in nfs4_get_vfs_file()
4891 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
4896 	old_access_bmap = stp->st_access_bmap;  in nfs4_get_vfs_file()
4897 	set_access(open->op_share_access, stp);  in nfs4_get_vfs_file()
4900 	old_deny_bmap = stp->st_deny_bmap;  in nfs4_get_vfs_file()
4901 	set_deny(open->op_share_deny, stp);  in nfs4_get_vfs_file()
4902 	fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);  in nfs4_get_vfs_file()
4904 	if (!fp->fi_fds[oflag]) {  in nfs4_get_vfs_file()
4905 		spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
4909 		spin_lock(&fp->fi_lock);  in nfs4_get_vfs_file()
4910 		if (!fp->fi_fds[oflag]) {  in nfs4_get_vfs_file()
4911 			fp->fi_fds[oflag] = nf;  in nfs4_get_vfs_file()
4915 	spin_unlock(&fp->fi_lock);  in nfs4_get_vfs_file()
4919 	status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode,  in nfs4_get_vfs_file()
4930 	stp->st_access_bmap = old_access_bmap;  in nfs4_get_vfs_file()
4931 	nfs4_file_put_access(fp, open->op_share_access);  in nfs4_get_vfs_file()
4940 	unsigned char old_deny_bmap = stp->st_deny_bmap;  in nfs4_upgrade_open()
4942 	if (!test_access(open->op_share_access, stp))  in nfs4_upgrade_open()
4946 	spin_lock(&fp->fi_lock);  in nfs4_upgrade_open()
4947 	status = nfs4_file_check_deny(fp, open->op_share_deny);  in nfs4_upgrade_open()
4949 		set_deny(open->op_share_deny, stp);  in nfs4_upgrade_open()
4950 		fp->fi_share_deny |=  in nfs4_upgrade_open()
4951 				(open->op_share_deny & NFS4_SHARE_DENY_BOTH);  in nfs4_upgrade_open()
4953 	spin_unlock(&fp->fi_lock);  in nfs4_upgrade_open()
4967 	if (clp->cl_cb_state == NFSD4_CB_UP)  in nfsd4_cb_channel_good()
4974 	return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;  in nfsd4_cb_channel_good()
4985 	fl->fl_lmops = &nfsd_lease_mng_ops;  in nfs4_alloc_init_lease()
4986 	fl->fl_flags = FL_DELEG;  in nfs4_alloc_init_lease()
4987 	fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;  in nfs4_alloc_init_lease()
4988 	fl->fl_end = OFFSET_MAX;  in nfs4_alloc_init_lease()
4989 	fl->fl_owner = (fl_owner_t)dp;  in nfs4_alloc_init_lease()
4990 	fl->fl_pid = current->tgid;  in nfs4_alloc_init_lease()
4991 	fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file;  in nfs4_alloc_init_lease()
5009 	if (fp->fi_had_conflict)  in nfs4_set_delegation()
5010 		return ERR_PTR(-EAGAIN);  in nfs4_set_delegation()
5016 		return ERR_PTR(-EBADF);  in nfs4_set_delegation()
5019 	spin_lock(&fp->fi_lock);  in nfs4_set_delegation()
5021 		status = -EAGAIN;  in nfs4_set_delegation()
5022 	else if (!fp->fi_deleg_file) {  in nfs4_set_delegation()
5023 		fp->fi_deleg_file = nf;  in nfs4_set_delegation()
5026 		fp->fi_delegees = 1;  in nfs4_set_delegation()
5029 		fp->fi_delegees++;  in nfs4_set_delegation()
5030 	spin_unlock(&fp->fi_lock);  in nfs4_set_delegation()
5037 	status = -ENOMEM;  in nfs4_set_delegation()
5046 	status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL);  in nfs4_set_delegation()
5053 	spin_lock(&fp->fi_lock);  in nfs4_set_delegation()
5054 	if (fp->fi_had_conflict)  in nfs4_set_delegation()
5055 		status = -EAGAIN;  in nfs4_set_delegation()
5058 	spin_unlock(&fp->fi_lock);  in nfs4_set_delegation()
5066 	vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp);  in nfs4_set_delegation()
5068 	put_clnt_odstate(dp->dl_clnt_odstate);  in nfs4_set_delegation()
5069 	nfs4_put_stid(&dp->dl_stid);  in nfs4_set_delegation()
5077 	open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_open_deleg_none_ext()
5078 	if (status == -EAGAIN)  in nfsd4_open_deleg_none_ext()
5079 		open->op_why_no_deleg = WND4_CONTENTION;  in nfsd4_open_deleg_none_ext()
5081 		open->op_why_no_deleg = WND4_RESOURCE;  in nfsd4_open_deleg_none_ext()
5082 		switch (open->op_deleg_want) {  in nfsd4_open_deleg_none_ext()
5088 			open->op_why_no_deleg = WND4_CANCELLED;  in nfsd4_open_deleg_none_ext()
5107 	struct nfs4_openowner *oo = openowner(stp->st_stateowner);  in nfs4_open_delegation()
5108 	struct nfs4_client *clp = stp->st_stid.sc_client;  in nfs4_open_delegation()
5112 	cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);  in nfs4_open_delegation()
5113 	open->op_recall = 0;  in nfs4_open_delegation()
5114 	switch (open->op_claim_type) {  in nfs4_open_delegation()
5117 				open->op_recall = 1;  in nfs4_open_delegation()
5118 			if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)  in nfs4_open_delegation()
5128 			if (locks_in_grace(clp->net))  in nfs4_open_delegation()
5130 			if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))  in nfs4_open_delegation()
5139 			if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)  in nfs4_open_delegation()
5141 			if (open->op_create == NFS4_OPEN_CREATE)  in nfs4_open_delegation()
5147 	dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);  in nfs4_open_delegation()
5151 	memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));  in nfs4_open_delegation()
5153 	trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);  in nfs4_open_delegation()
5154 	open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;  in nfs4_open_delegation()
5155 	nfs4_put_stid(&dp->dl_stid);  in nfs4_open_delegation()
5158 	open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;  in nfs4_open_delegation()
5159 	if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&  in nfs4_open_delegation()
5160 	    open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {  in nfs4_open_delegation()
5162 		open->op_recall = 1;  in nfs4_open_delegation()
5166 	if (open->op_deleg_want)  in nfs4_open_delegation()
5174 	if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&  in nfsd4_deleg_xgrade_none_ext()
5175 	    dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {  in nfsd4_deleg_xgrade_none_ext()
5176 		open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_deleg_xgrade_none_ext()
5177 		open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;  in nfsd4_deleg_xgrade_none_ext()
5178 	} else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&  in nfsd4_deleg_xgrade_none_ext()
5179 		   dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {  in nfsd4_deleg_xgrade_none_ext()
5180 		open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_deleg_xgrade_none_ext()
5181 		open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;  in nfsd4_deleg_xgrade_none_ext()
5192 	struct nfsd4_compoundres *resp = rqstp->rq_resp;  in nfsd4_process_open2()
5193 	struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;  in nfsd4_process_open2()
5205 	fp = find_or_add_file(open->op_file, &current_fh->fh_handle);  in nfsd4_process_open2()
5206 	if (fp != open->op_file) {  in nfsd4_process_open2()
5212 		open->op_file = NULL;  in nfsd4_process_open2()
5220 		if (!open->op_stp)  in nfsd4_process_open2()
5234 			mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5240 			stp->st_stid.sc_type = NFS4_CLOSED_STID;  in nfsd4_process_open2()
5242 			mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5246 		stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,  in nfsd4_process_open2()
5247 							open->op_odstate);  in nfsd4_process_open2()
5248 		if (stp->st_clnt_odstate == open->op_odstate)  in nfsd4_process_open2()
5249 			open->op_odstate = NULL;  in nfsd4_process_open2()
5252 	nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);  in nfsd4_process_open2()
5253 	mutex_unlock(&stp->st_mutex);  in nfsd4_process_open2()
5255 	if (nfsd4_has_session(&resp->cstate)) {  in nfsd4_process_open2()
5256 		if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {  in nfsd4_process_open2()
5257 			open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;  in nfsd4_process_open2()
5258 			open->op_why_no_deleg = WND4_NOT_WANTED;  in nfsd4_process_open2()
5270 	trace_nfsd_open(&stp->st_stid.sc_stateid);  in nfsd4_process_open2()
5273 	if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&  in nfsd4_process_open2()
5274 	    open->op_deleg_want)  in nfsd4_process_open2()
5279 	if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)  in nfsd4_process_open2()
5280 		open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;  in nfsd4_process_open2()
5284 	open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;  in nfsd4_process_open2()
5285 	if (nfsd4_has_session(&resp->cstate))  in nfsd4_process_open2()
5286 		open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;  in nfsd4_process_open2()
5287 	else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))  in nfsd4_process_open2()
5288 		open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;  in nfsd4_process_open2()
5291 		nfs4_put_stid(&dp->dl_stid);  in nfsd4_process_open2()
5293 		nfs4_put_stid(&stp->st_stid);  in nfsd4_process_open2()
5301 	if (open->op_openowner) {  in nfsd4_cleanup_open_state()
5302 		struct nfs4_stateowner *so = &open->op_openowner->oo_owner;  in nfsd4_cleanup_open_state()
5307 	if (open->op_file)  in nfsd4_cleanup_open_state()
5308 		kmem_cache_free(file_slab, open->op_file);  in nfsd4_cleanup_open_state()
5309 	if (open->op_stp)  in nfsd4_cleanup_open_state()
5310 		nfs4_put_stid(&open->op_stp->st_stid);  in nfsd4_cleanup_open_state()
5311 	if (open->op_odstate)  in nfsd4_cleanup_open_state()
5312 		kmem_cache_free(odstate_slab, open->op_odstate);  in nfsd4_cleanup_open_state()
5319 	clientid_t *clid = &u->renew;  in nfsd4_renew()
5328 	clp = cstate->clp;  in nfsd4_renew()
5330 	if (!list_empty(&clp->cl_delegations)  in nfsd4_renew()
5331 			&& clp->cl_cb_state != NFSD4_CB_UP)  in nfsd4_renew()
5342 	if (nn->grace_ended)  in nfsd4_end_grace()
5346 	nn->grace_ended = true;  in nfsd4_end_grace()
5363 	locks_end_grace(&nn->nfsd4_manager);  in nfsd4_end_grace()
5377 	time64_t double_grace_period_end = nn->boot_time +  in clients_still_reclaiming()
5378 					   2 * nn->nfsd4_lease;  in clients_still_reclaiming()
5380 	if (nn->track_reclaim_completes &&  in clients_still_reclaiming()
5381 			atomic_read(&nn->nr_reclaim_complete) ==  in clients_still_reclaiming()
5382 			nn->reclaim_str_hashtbl_size)  in clients_still_reclaiming()
5384 	if (!nn->somebody_reclaimed)  in clients_still_reclaiming()
5386 	nn->somebody_reclaimed = false;  in clients_still_reclaiming()
5405 	time64_t cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease;  in nfs4_laundromat()
5406 	time64_t t, new_timeo = nn->nfsd4_lease;  in nfs4_laundromat()
5418 	spin_lock(&nn->s2s_cp_lock);  in nfs4_laundromat()
5419 	idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {  in nfs4_laundromat()
5421 		if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID &&  in nfs4_laundromat()
5422 				cps->cpntf_time < cutoff)  in nfs4_laundromat()
5425 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_laundromat()
5427 	spin_lock(&nn->client_lock);  in nfs4_laundromat()
5428 	list_for_each_safe(pos, next, &nn->client_lru) {  in nfs4_laundromat()
5430 		if (clp->cl_time > cutoff) {  in nfs4_laundromat()
5431 			t = clp->cl_time - cutoff;  in nfs4_laundromat()
5436 			trace_nfsd_clid_expired(&clp->cl_clientid);  in nfs4_laundromat()
5439 		list_add(&clp->cl_lru, &reaplist);  in nfs4_laundromat()
5441 	spin_unlock(&nn->client_lock);  in nfs4_laundromat()
5444 		trace_nfsd_clid_purged(&clp->cl_clientid);  in nfs4_laundromat()
5445 		list_del_init(&clp->cl_lru);  in nfs4_laundromat()
5449 	list_for_each_safe(pos, next, &nn->del_recall_lru) {  in nfs4_laundromat()
5451 		if (dp->dl_time > cutoff) {  in nfs4_laundromat()
5452 			t = dp->dl_time - cutoff;  in nfs4_laundromat()
5457 		list_add(&dp->dl_recall_lru, &reaplist);  in nfs4_laundromat()
5463 		list_del_init(&dp->dl_recall_lru);  in nfs4_laundromat()
5467 	spin_lock(&nn->client_lock);  in nfs4_laundromat()
5468 	while (!list_empty(&nn->close_lru)) {  in nfs4_laundromat()
5469 		oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,  in nfs4_laundromat()
5471 		if (oo->oo_time > cutoff) {  in nfs4_laundromat()
5472 			t = oo->oo_time - cutoff;  in nfs4_laundromat()
5476 		list_del_init(&oo->oo_close_lru);  in nfs4_laundromat()
5477 		stp = oo->oo_last_closed_stid;  in nfs4_laundromat()
5478 		oo->oo_last_closed_stid = NULL;  in nfs4_laundromat()
5479 		spin_unlock(&nn->client_lock);  in nfs4_laundromat()
5480 		nfs4_put_stid(&stp->st_stid);  in nfs4_laundromat()
5481 		spin_lock(&nn->client_lock);  in nfs4_laundromat()
5483 	spin_unlock(&nn->client_lock);  in nfs4_laundromat()
5488 	 * So, we clean out any un-revisited request after a lease period  in nfs4_laundromat()
5497 	spin_lock(&nn->blocked_locks_lock);  in nfs4_laundromat()
5498 	while (!list_empty(&nn->blocked_locks_lru)) {  in nfs4_laundromat()
5499 		nbl = list_first_entry(&nn->blocked_locks_lru,  in nfs4_laundromat()
5501 		if (nbl->nbl_time > cutoff) {  in nfs4_laundromat()
5502 			t = nbl->nbl_time - cutoff;  in nfs4_laundromat()
5506 		list_move(&nbl->nbl_lru, &reaplist);  in nfs4_laundromat()
5507 		list_del_init(&nbl->nbl_list);  in nfs4_laundromat()
5509 	spin_unlock(&nn->blocked_locks_lock);  in nfs4_laundromat()
5514 		list_del_init(&nbl->nbl_lru);  in nfs4_laundromat()
5534 	queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);  in laundromat_main()
5539 	if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))  in nfs4_check_fh()
5565 	if (stp->st_openstp)  in nfs4_check_openmode()
5566 		stp = stp->st_openstp;  in nfs4_check_openmode()
5609 	if (has_session && in->si_generation == 0)  in check_stateid_generation()
5612 	if (in->si_generation == ref->si_generation)  in check_stateid_generation()
5620 	 * non-buggy client.  For example, if the client sends a lock  in check_stateid_generation()
5635 	spin_lock(&s->sc_lock);  in nfsd4_stid_check_stateid_generation()
5638 		ret = check_stateid_generation(in, &s->sc_stateid, has_session);  in nfsd4_stid_check_stateid_generation()
5639 	spin_unlock(&s->sc_lock);  in nfsd4_stid_check_stateid_generation()
5645 	if (ols->st_stateowner->so_is_open_owner &&  in nfsd4_check_openowner_confirmed()
5646 	    !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))  in nfsd4_check_openowner_confirmed()
5659 	spin_lock(&cl->cl_lock);  in nfsd4_validate_stateid()
5666 	switch (s->sc_type) {  in nfsd4_validate_stateid()
5678 		printk("unknown stateid type %x\n", s->sc_type);  in nfsd4_validate_stateid()
5685 	spin_unlock(&cl->cl_lock);  in nfsd4_validate_stateid()
5709 	status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn,  in nfsd4_lookup_stateid()
5712 		if (cstate->session)  in nfsd4_lookup_stateid()
5718 	*s = find_stateid_by_type(cstate->clp, stateid, typemask);  in nfsd4_lookup_stateid()
5721 	if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {  in nfsd4_lookup_stateid()
5723 		if (cstate->minorversion)  in nfsd4_lookup_stateid()
5736 	switch (s->sc_type) {  in nfs4_find_file()
5738 		if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))  in nfs4_find_file()
5740 		return nfsd_file_get(s->sc_file->fi_deleg_file);  in nfs4_find_file()
5744 			return find_readable_file(s->sc_file);  in nfs4_find_file()
5746 			return find_writeable_file(s->sc_file);  in nfs4_find_file()
5773 		status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,  in nfs4_check_file()
5791 	WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID);  in _free_cpntf_state_locked()
5792 	if (!refcount_dec_and_test(&cps->cp_stateid.sc_count))  in _free_cpntf_state_locked()
5794 	list_del(&cps->cp_list);  in _free_cpntf_state_locked()
5795 	idr_remove(&nn->s2s_cp_stateids,  in _free_cpntf_state_locked()
5796 		   cps->cp_stateid.stid.si_opaque.so_id);  in _free_cpntf_state_locked()
5811 	if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id)  in manage_cpntf_state()
5813 	spin_lock(&nn->s2s_cp_lock);  in manage_cpntf_state()
5814 	cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id);  in manage_cpntf_state()
5818 		if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) {  in manage_cpntf_state()
5823 			refcount_inc(&state->cp_stateid.sc_count);  in manage_cpntf_state()
5828 	spin_unlock(&nn->s2s_cp_lock);  in manage_cpntf_state()
5847 	cps->cpntf_time = ktime_get_boottime_seconds();  in find_cpntf_state()
5849 	status = lookup_clientid(&cps->cp_p_clid, &cstate, nn, true);  in find_cpntf_state()
5852 	status = nfsd4_lookup_stateid(&cstate, &cps->cp_p_stateid,  in find_cpntf_state()
5863 	spin_lock(&nn->s2s_cp_lock);  in nfs4_put_cpntf_state()
5865 	spin_unlock(&nn->s2s_cp_lock);  in nfs4_put_cpntf_state()
5877 	struct inode *ino = d_inode(fhp->fh_dentry);  in nfs4_preprocess_stateid_op()
5906 	switch (s->sc_type) {  in nfs4_preprocess_stateid_op()
5942 	struct nfsd4_test_stateid *test_stateid = &u->test_stateid;  in nfsd4_test_stateid()
5944 	struct nfs4_client *cl = cstate->session->se_client;  in nfsd4_test_stateid()
5946 	list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)  in nfsd4_test_stateid()
5947 		stateid->ts_id_status =  in nfsd4_test_stateid()
5948 			nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);  in nfsd4_test_stateid()
5963 	ret = check_stateid_generation(stateid, &s->sc_stateid, 1);  in nfsd4_free_lock_stateid()
5968 	if (check_for_locks(stp->st_stid.sc_file,  in nfsd4_free_lock_stateid()
5969 			    lockowner(stp->st_stateowner)))  in nfsd4_free_lock_stateid()
5976 	mutex_unlock(&stp->st_mutex);  in nfsd4_free_lock_stateid()
5986 	struct nfsd4_free_stateid *free_stateid = &u->free_stateid;  in nfsd4_free_stateid()
5987 	stateid_t *stateid = &free_stateid->fr_stateid;  in nfsd4_free_stateid()
5990 	struct nfs4_client *cl = cstate->session->se_client;  in nfsd4_free_stateid()
5993 	spin_lock(&cl->cl_lock);  in nfsd4_free_stateid()
5997 	spin_lock(&s->sc_lock);  in nfsd4_free_stateid()
5998 	switch (s->sc_type) {  in nfsd4_free_stateid()
6003 		ret = check_stateid_generation(stateid, &s->sc_stateid, 1);  in nfsd4_free_stateid()
6009 		spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6010 		refcount_inc(&s->sc_count);  in nfsd4_free_stateid()
6011 		spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6015 		spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6017 		list_del_init(&dp->dl_recall_lru);  in nfsd4_free_stateid()
6018 		spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6024 	spin_unlock(&s->sc_lock);  in nfsd4_free_stateid()
6026 	spin_unlock(&cl->cl_lock);  in nfsd4_free_stateid()
6040 	struct svc_fh *current_fh = &cstate->current_fh;  in nfs4_seqid_op_checks()
6041 	struct nfs4_stateowner *sop = stp->st_stateowner;  in nfs4_seqid_op_checks()
6050 	status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));  in nfs4_seqid_op_checks()
6052 		status = nfs4_check_fh(current_fh, &stp->st_stid);  in nfs4_seqid_op_checks()
6054 		mutex_unlock(&stp->st_mutex);  in nfs4_seqid_op_checks()
6078 	nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);  in nfs4_preprocess_seqid_op()
6084 		nfs4_put_stid(&stp->st_stid);  in nfs4_preprocess_seqid_op()
6099 	oo = openowner(stp->st_stateowner);  in nfs4_preprocess_confirmed_seqid_op()
6100 	if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {  in nfs4_preprocess_confirmed_seqid_op()
6101 		mutex_unlock(&stp->st_mutex);  in nfs4_preprocess_confirmed_seqid_op()
6102 		nfs4_put_stid(&stp->st_stid);  in nfs4_preprocess_confirmed_seqid_op()
6113 	struct nfsd4_open_confirm *oc = &u->open_confirm;  in nfsd4_open_confirm()
6120 			cstate->current_fh.fh_dentry);  in nfsd4_open_confirm()
6122 	status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);  in nfsd4_open_confirm()
6127 					oc->oc_seqid, &oc->oc_req_stateid,  in nfsd4_open_confirm()
6131 	oo = openowner(stp->st_stateowner);  in nfsd4_open_confirm()
6133 	if (oo->oo_flags & NFS4_OO_CONFIRMED) {  in nfsd4_open_confirm()
6134 		mutex_unlock(&stp->st_mutex);  in nfsd4_open_confirm()
6137 	oo->oo_flags |= NFS4_OO_CONFIRMED;  in nfsd4_open_confirm()
6138 	nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);  in nfsd4_open_confirm()
6139 	mutex_unlock(&stp->st_mutex);  in nfsd4_open_confirm()
6140 	trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid);  in nfsd4_open_confirm()
6141 	nfsd4_client_record_create(oo->oo_owner.so_client);  in nfsd4_open_confirm()
6144 	nfs4_put_stid(&stp->st_stid);  in nfsd4_open_confirm()
6154 	nfs4_file_put_access(stp->st_stid.sc_file, access);  in nfs4_stateid_downgrade_bit()
6180 	struct nfsd4_open_downgrade *od = &u->open_downgrade;  in nfsd4_open_downgrade()
6186 			cstate->current_fh.fh_dentry);  in nfsd4_open_downgrade()
6189 	if (od->od_deleg_want)  in nfsd4_open_downgrade()
6191 			od->od_deleg_want);  in nfsd4_open_downgrade()
6193 	status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,  in nfsd4_open_downgrade()
6194 					&od->od_stateid, &stp, nn);  in nfsd4_open_downgrade()
6198 	if (!test_access(od->od_share_access, stp)) {  in nfsd4_open_downgrade()
6200 			stp->st_access_bmap, od->od_share_access);  in nfsd4_open_downgrade()
6203 	if (!test_deny(od->od_share_deny, stp)) {  in nfsd4_open_downgrade()
6205 			stp->st_deny_bmap, od->od_share_deny);  in nfsd4_open_downgrade()
6208 	nfs4_stateid_downgrade(stp, od->od_share_access);  in nfsd4_open_downgrade()
6209 	reset_union_bmap_deny(od->od_share_deny, stp);  in nfsd4_open_downgrade()
6210 	nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);  in nfsd4_open_downgrade()
6213 	mutex_unlock(&stp->st_mutex);  in nfsd4_open_downgrade()
6214 	nfs4_put_stid(&stp->st_stid);  in nfsd4_open_downgrade()
6222 	struct nfs4_client *clp = s->st_stid.sc_client;  in nfsd4_close_open_stateid()
6227 	spin_lock(&clp->cl_lock);  in nfsd4_close_open_stateid()
6230 	if (clp->cl_minorversion) {  in nfsd4_close_open_stateid()
6233 		spin_unlock(&clp->cl_lock);  in nfsd4_close_open_stateid()
6235 			nfs4_free_cpntf_statelist(clp->net, &stp->st_stid);  in nfsd4_close_open_stateid()
6238 		spin_unlock(&clp->cl_lock);  in nfsd4_close_open_stateid()
6241 			move_to_close_lru(s, clp->net);  in nfsd4_close_open_stateid()
6252 	struct nfsd4_close *close = &u->close;  in nfsd4_close()
6259 			cstate->current_fh.fh_dentry);  in nfsd4_close()
6261 	status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,  in nfsd4_close()
6262 					&close->cl_stateid,  in nfsd4_close()
6269 	stp->st_stid.sc_type = NFS4_CLOSED_STID;  in nfsd4_close()
6277 	nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);  in nfsd4_close()
6280 	mutex_unlock(&stp->st_mutex);  in nfsd4_close()
6289 	memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid));  in nfsd4_close()
6292 	nfs4_put_stid(&stp->st_stid);  in nfsd4_close()
6301 	struct nfsd4_delegreturn *dr = &u->delegreturn;  in nfsd4_delegreturn()
6303 	stateid_t *stateid = &dr->dr_stateid;  in nfsd4_delegreturn()
6308 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))  in nfsd4_delegreturn()
6315 	status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate));  in nfsd4_delegreturn()
6321 	nfs4_put_stid(&dp->dl_stid);  in nfsd4_delegreturn()
6343 	return end > start ? end - 1: NFS4_MAX_UINT64;  in last_byte_offset()
6347  * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
6348  * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
6349  * byte, because of sign extension problems.  Since NFSv4 calls for 64-bit
6350  * locking, this prevents us from being completely protocol-compliant.  The
6357 	if (lock->fl_start < 0)  in nfs4_transform_lock_offset()
6358 		lock->fl_start = OFFSET_MAX;  in nfs4_transform_lock_offset()
6359 	if (lock->fl_end < 0)  in nfs4_transform_lock_offset()
6360 		lock->fl_end = OFFSET_MAX;  in nfs4_transform_lock_offset()
6368 	nfs4_get_stateowner(&lo->lo_owner);  in nfsd4_fl_get_owner()
6378 		nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_fl_put_owner()
6384 	struct nfs4_lockowner		*lo = (struct nfs4_lockowner *)fl->fl_owner;  in nfsd4_lm_notify()
6385 	struct net			*net = lo->lo_owner.so_client->net;  in nfsd4_lm_notify()
6392 	spin_lock(&nn->blocked_locks_lock);  in nfsd4_lm_notify()
6393 	if (!list_empty(&nbl->nbl_list)) {  in nfsd4_lm_notify()
6394 		list_del_init(&nbl->nbl_list);  in nfsd4_lm_notify()
6395 		list_del_init(&nbl->nbl_lru);  in nfsd4_lm_notify()
6398 	spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lm_notify()
6401 		nfsd4_run_cb(&nbl->nbl_cb);  in nfsd4_lm_notify()
6415 	if (fl->fl_lmops == &nfsd_posix_mng_ops) {  in nfs4_set_lock_denied()
6416 		lo = (struct nfs4_lockowner *) fl->fl_owner;  in nfs4_set_lock_denied()
6417 		xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,  in nfs4_set_lock_denied()
6419 		if (!deny->ld_owner.data)  in nfs4_set_lock_denied()
6422 		deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;  in nfs4_set_lock_denied()
6425 		deny->ld_owner.len = 0;  in nfs4_set_lock_denied()
6426 		deny->ld_owner.data = NULL;  in nfs4_set_lock_denied()
6427 		deny->ld_clientid.cl_boot = 0;  in nfs4_set_lock_denied()
6428 		deny->ld_clientid.cl_id = 0;  in nfs4_set_lock_denied()
6430 	deny->ld_start = fl->fl_start;  in nfs4_set_lock_denied()
6431 	deny->ld_length = NFS4_MAX_UINT64;  in nfs4_set_lock_denied()
6432 	if (fl->fl_end != NFS4_MAX_UINT64)  in nfs4_set_lock_denied()
6433 		deny->ld_length = fl->fl_end - fl->fl_start + 1;          in nfs4_set_lock_denied()
6434 	deny->ld_type = NFS4_READ_LT;  in nfs4_set_lock_denied()
6435 	if (fl->fl_type != F_RDLCK)  in nfs4_set_lock_denied()
6436 		deny->ld_type = NFS4_WRITE_LT;  in nfs4_set_lock_denied()
6445 	lockdep_assert_held(&clp->cl_lock);  in find_lockowner_str_locked()
6447 	list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],  in find_lockowner_str_locked()
6449 		if (so->so_is_open_owner)  in find_lockowner_str_locked()
6462 	spin_lock(&clp->cl_lock);  in find_lockowner_str()
6464 	spin_unlock(&clp->cl_lock);  in find_lockowner_str()
6487  * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 
6499 	lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);  in alloc_init_lock_stateowner()
6502 	INIT_LIST_HEAD(&lo->lo_blocked);  in alloc_init_lock_stateowner()
6503 	INIT_LIST_HEAD(&lo->lo_owner.so_stateids);  in alloc_init_lock_stateowner()
6504 	lo->lo_owner.so_is_open_owner = 0;  in alloc_init_lock_stateowner()
6505 	lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;  in alloc_init_lock_stateowner()
6506 	lo->lo_owner.so_ops = &lockowner_ops;  in alloc_init_lock_stateowner()
6507 	spin_lock(&clp->cl_lock);  in alloc_init_lock_stateowner()
6508 	ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);  in alloc_init_lock_stateowner()
6510 		list_add(&lo->lo_owner.so_strhash,  in alloc_init_lock_stateowner()
6511 			 &clp->cl_ownerstr_hashtbl[strhashval]);  in alloc_init_lock_stateowner()
6514 		nfs4_free_stateowner(&lo->lo_owner);  in alloc_init_lock_stateowner()
6516 	spin_unlock(&clp->cl_lock);  in alloc_init_lock_stateowner()
6526 	lockdep_assert_held(&ost->st_stid.sc_client->cl_lock);  in find_lock_stateid()
6528 	/* If ost is not hashed, ost->st_locks will not be valid */  in find_lock_stateid()
6530 		list_for_each_entry(lst, &ost->st_locks, st_locks) {  in find_lock_stateid()
6531 			if (lst->st_stateowner == &lo->lo_owner) {  in find_lock_stateid()
6532 				refcount_inc(&lst->st_stid.sc_count);  in find_lock_stateid()
6544 	struct nfs4_client *clp = lo->lo_owner.so_client;  in init_lock_stateid()
6547 	mutex_init(&stp->st_mutex);  in init_lock_stateid()
6548 	mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX);  in init_lock_stateid()
6550 	spin_lock(&clp->cl_lock);  in init_lock_stateid()
6556 	refcount_inc(&stp->st_stid.sc_count);  in init_lock_stateid()
6557 	stp->st_stid.sc_type = NFS4_LOCK_STID;  in init_lock_stateid()
6558 	stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);  in init_lock_stateid()
6560 	stp->st_stid.sc_file = fp;  in init_lock_stateid()
6561 	stp->st_access_bmap = 0;  in init_lock_stateid()
6562 	stp->st_deny_bmap = open_stp->st_deny_bmap;  in init_lock_stateid()
6563 	stp->st_openstp = open_stp;  in init_lock_stateid()
6564 	spin_lock(&fp->fi_lock);  in init_lock_stateid()
6565 	list_add(&stp->st_locks, &open_stp->st_locks);  in init_lock_stateid()
6566 	list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);  in init_lock_stateid()
6567 	list_add(&stp->st_perfile, &fp->fi_stateids);  in init_lock_stateid()
6568 	spin_unlock(&fp->fi_lock);  in init_lock_stateid()
6569 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
6572 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
6574 		nfs4_put_stid(&retstp->st_stid);  in init_lock_stateid()
6578 	mutex_unlock(&stp->st_mutex);  in init_lock_stateid()
6581 	spin_unlock(&clp->cl_lock);  in init_lock_stateid()
6582 	mutex_unlock(&stp->st_mutex);  in init_lock_stateid()
6593 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);  in find_or_create_lock_stateid()
6594 	struct nfs4_client *clp = oo->oo_owner.so_client;  in find_or_create_lock_stateid()
6597 	spin_lock(&clp->cl_lock);  in find_or_create_lock_stateid()
6599 	spin_unlock(&clp->cl_lock);  in find_or_create_lock_stateid()
6603 		nfs4_put_stid(&lst->st_stid);  in find_or_create_lock_stateid()
6627 	struct nfs4_file *fp = lock_stp->st_stid.sc_file;  in get_lock_access()
6629 	lockdep_assert_held(&fp->fi_lock);  in get_lock_access()
6644 	struct nfs4_file *fi = ost->st_stid.sc_file;  in lookup_or_create_lock_state()
6645 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);  in lookup_or_create_lock_state()
6646 	struct nfs4_client *cl = oo->oo_owner.so_client;  in lookup_or_create_lock_state()
6647 	struct inode *inode = d_inode(cstate->current_fh.fh_dentry);  in lookup_or_create_lock_state()
6652 	lo = find_lockowner_str(cl, &lock->lk_new_owner);  in lookup_or_create_lock_state()
6654 		strhashval = ownerstr_hashval(&lock->lk_new_owner);  in lookup_or_create_lock_state()
6661 		if (!cstate->minorversion &&  in lookup_or_create_lock_state()
6662 		    lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)  in lookup_or_create_lock_state()
6675 	nfs4_put_stateowner(&lo->lo_owner);  in lookup_or_create_lock_state()
6686 	struct nfsd4_lock *lock = &u->lock;  in nfsd4_lock()
6706 		(long long) lock->lk_offset,  in nfsd4_lock()
6707 		(long long) lock->lk_length);  in nfsd4_lock()
6709 	if (check_lock_length(lock->lk_offset, lock->lk_length))  in nfsd4_lock()
6712 	if ((status = fh_verify(rqstp, &cstate->current_fh,  in nfsd4_lock()
6718 	if (lock->lk_is_new) {  in nfsd4_lock()
6721 			memcpy(&lock->lk_new_clientid,  in nfsd4_lock()
6722 				&cstate->session->se_client->cl_clientid,  in nfsd4_lock()
6726 		if (STALE_CLIENTID(&lock->lk_new_clientid, nn))  in nfsd4_lock()
6731 				        lock->lk_new_open_seqid,  in nfsd4_lock()
6732 		                        &lock->lk_new_open_stateid,  in nfsd4_lock()
6736 		mutex_unlock(&open_stp->st_mutex);  in nfsd4_lock()
6737 		open_sop = openowner(open_stp->st_stateowner);  in nfsd4_lock()
6739 		if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,  in nfsd4_lock()
6740 						&lock->lk_new_clientid))  in nfsd4_lock()
6746 				       lock->lk_old_lock_seqid,  in nfsd4_lock()
6747 				       &lock->lk_old_lock_stateid,  in nfsd4_lock()
6752 	lock_sop = lockowner(lock_stp->st_stateowner);  in nfsd4_lock()
6754 	lkflg = setlkflg(lock->lk_type);  in nfsd4_lock()
6760 	if (locks_in_grace(net) && !lock->lk_reclaim)  in nfsd4_lock()
6763 	if (!locks_in_grace(net) && lock->lk_reclaim)  in nfsd4_lock()
6766 	fp = lock_stp->st_stid.sc_file;  in nfsd4_lock()
6767 	switch (lock->lk_type) {  in nfsd4_lock()
6773 			spin_lock(&fp->fi_lock);  in nfsd4_lock()
6777 			spin_unlock(&fp->fi_lock);  in nfsd4_lock()
6785 			spin_lock(&fp->fi_lock);  in nfsd4_lock()
6789 			spin_unlock(&fp->fi_lock);  in nfsd4_lock()
6802 	nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);  in nfsd4_lock()
6809 	file_lock = &nbl->nbl_lock;  in nfsd4_lock()
6810 	file_lock->fl_type = fl_type;  in nfsd4_lock()
6811 	file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));  in nfsd4_lock()
6812 	file_lock->fl_pid = current->tgid;  in nfsd4_lock()
6813 	file_lock->fl_file = nf->nf_file;  in nfsd4_lock()
6814 	file_lock->fl_flags = fl_flags;  in nfsd4_lock()
6815 	file_lock->fl_lmops = &nfsd_posix_mng_ops;  in nfsd4_lock()
6816 	file_lock->fl_start = lock->lk_offset;  in nfsd4_lock()
6817 	file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);  in nfsd4_lock()
6828 		nbl->nbl_time = ktime_get_boottime_seconds();  in nfsd4_lock()
6829 		spin_lock(&nn->blocked_locks_lock);  in nfsd4_lock()
6830 		list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);  in nfsd4_lock()
6831 		list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);  in nfsd4_lock()
6832 		spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lock()
6835 	err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock);  in nfsd4_lock()
6838 		nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);  in nfsd4_lock()
6840 		if (lock->lk_reclaim)  in nfsd4_lock()
6841 			nn->somebody_reclaimed = true;  in nfsd4_lock()
6846 	case -EAGAIN:		/* conflock holds conflicting lock */  in nfsd4_lock()
6849 		nfs4_set_lock_denied(conflock, &lock->lk_denied);  in nfsd4_lock()
6851 	case -EDEADLK:  in nfsd4_lock()
6863 			spin_lock(&nn->blocked_locks_lock);  in nfsd4_lock()
6864 			list_del_init(&nbl->nbl_list);  in nfsd4_lock()
6865 			list_del_init(&nbl->nbl_lru);  in nfsd4_lock()
6866 			spin_unlock(&nn->blocked_locks_lock);  in nfsd4_lock()
6874 		if (cstate->replay_owner &&  in nfsd4_lock()
6875 		    cstate->replay_owner != &lock_sop->lo_owner &&  in nfsd4_lock()
6877 			lock_sop->lo_owner.so_seqid++;  in nfsd4_lock()
6880 		 * If this is a new, never-before-used stateid, and we are  in nfsd4_lock()
6886 		mutex_unlock(&lock_stp->st_mutex);  in nfsd4_lock()
6888 		nfs4_put_stid(&lock_stp->st_stid);  in nfsd4_lock()
6891 		nfs4_put_stid(&open_stp->st_stid);  in nfsd4_lock()
6912 	err = nfserrno(nfsd_open_break_lease(fhp->fh_dentry->d_inode,  in nfsd_test_lock()
6916 	lock->fl_file = nf->nf_file;  in nfsd_test_lock()
6917 	err = nfserrno(vfs_test_lock(nf->nf_file, lock));  in nfsd_test_lock()
6918 	lock->fl_file = NULL;  in nfsd_test_lock()
6932 	struct nfsd4_lockt *lockt = &u->lockt;  in nfsd4_lockt()
6941 	if (check_lock_length(lockt->lt_offset, lockt->lt_length))  in nfsd4_lockt()
6945 		status = lookup_clientid(&lockt->lt_clientid, cstate, nn,  in nfsd4_lockt()
6951 	if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))  in nfsd4_lockt()
6961 	switch (lockt->lt_type) {  in nfsd4_lockt()
6964 			file_lock->fl_type = F_RDLCK;  in nfsd4_lockt()
6968 			file_lock->fl_type = F_WRLCK;  in nfsd4_lockt()
6976 	lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);  in nfsd4_lockt()
6978 		file_lock->fl_owner = (fl_owner_t)lo;  in nfsd4_lockt()
6979 	file_lock->fl_pid = current->tgid;  in nfsd4_lockt()
6980 	file_lock->fl_flags = FL_POSIX;  in nfsd4_lockt()
6982 	file_lock->fl_start = lockt->lt_offset;  in nfsd4_lockt()
6983 	file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);  in nfsd4_lockt()
6987 	status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);  in nfsd4_lockt()
6991 	if (file_lock->fl_type != F_UNLCK) {  in nfsd4_lockt()
6993 		nfs4_set_lock_denied(file_lock, &lockt->lt_denied);  in nfsd4_lockt()
6997 		nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_lockt()
7007 	struct nfsd4_locku *locku = &u->locku;  in nfsd4_locku()
7016 		(long long) locku->lu_offset,  in nfsd4_locku()
7017 		(long long) locku->lu_length);  in nfsd4_locku()
7019 	if (check_lock_length(locku->lu_offset, locku->lu_length))  in nfsd4_locku()
7022 	status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,  in nfsd4_locku()
7023 					&locku->lu_stateid, NFS4_LOCK_STID,  in nfsd4_locku()
7027 	nf = find_any_file(stp->st_stid.sc_file);  in nfsd4_locku()
7039 	file_lock->fl_type = F_UNLCK;  in nfsd4_locku()
7040 	file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));  in nfsd4_locku()
7041 	file_lock->fl_pid = current->tgid;  in nfsd4_locku()
7042 	file_lock->fl_file = nf->nf_file;  in nfsd4_locku()
7043 	file_lock->fl_flags = FL_POSIX;  in nfsd4_locku()
7044 	file_lock->fl_lmops = &nfsd_posix_mng_ops;  in nfsd4_locku()
7045 	file_lock->fl_start = locku->lu_offset;  in nfsd4_locku()
7047 	file_lock->fl_end = last_byte_offset(locku->lu_offset,  in nfsd4_locku()
7048 						locku->lu_length);  in nfsd4_locku()
7051 	err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL);  in nfsd4_locku()
7056 	nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);  in nfsd4_locku()
7060 	mutex_unlock(&stp->st_mutex);  in nfsd4_locku()
7061 	nfs4_put_stid(&stp->st_stid);  in nfsd4_locku()
7093 	inode = locks_inode(nf->nf_file);  in check_for_locks()
7094 	flctx = inode->i_flctx;  in check_for_locks()
7096 	if (flctx && !list_empty_careful(&flctx->flc_posix)) {  in check_for_locks()
7097 		spin_lock(&flctx->flc_lock);  in check_for_locks()
7098 		list_for_each_entry(fl, &flctx->flc_posix, fl_list) {  in check_for_locks()
7099 			if (fl->fl_owner == (fl_owner_t)lowner) {  in check_for_locks()
7104 		spin_unlock(&flctx->flc_lock);  in check_for_locks()
7115 	struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;  in nfsd4_release_lockowner()
7116 	clientid_t *clid = &rlockowner->rl_clientid;  in nfsd4_release_lockowner()
7120 	struct xdr_netobj *owner = &rlockowner->rl_owner;  in nfsd4_release_lockowner()
7128 		clid->cl_boot, clid->cl_id);  in nfsd4_release_lockowner()
7134 	clp = cstate->clp;  in nfsd4_release_lockowner()
7136 	spin_lock(&clp->cl_lock);  in nfsd4_release_lockowner()
7137 	list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],  in nfsd4_release_lockowner()
7140 		if (sop->so_is_open_owner || !same_owner_str(sop, owner))  in nfsd4_release_lockowner()
7143 		if (atomic_read(&sop->so_count) != 1) {  in nfsd4_release_lockowner()
7144 			spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
7153 		spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
7158 	while (!list_empty(&lo->lo_owner.so_stateids)) {  in nfsd4_release_lockowner()
7159 		stp = list_first_entry(&lo->lo_owner.so_stateids,  in nfsd4_release_lockowner()
7165 	spin_unlock(&clp->cl_lock);  in nfsd4_release_lockowner()
7168 	nfs4_put_stateowner(&lo->lo_owner);  in nfsd4_release_lockowner()
7185 	return (crp && crp->cr_clp);  in nfs4_has_reclaimed_state()
7204 		INIT_LIST_HEAD(&crp->cr_strhash);  in nfs4_client_to_reclaim()
7205 		list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);  in nfs4_client_to_reclaim()
7206 		crp->cr_name.data = name.data;  in nfs4_client_to_reclaim()
7207 		crp->cr_name.len = name.len;  in nfs4_client_to_reclaim()
7208 		crp->cr_princhash.data = princhash.data;  in nfs4_client_to_reclaim()
7209 		crp->cr_princhash.len = princhash.len;  in nfs4_client_to_reclaim()
7210 		crp->cr_clp = NULL;  in nfs4_client_to_reclaim()
7211 		nn->reclaim_str_hashtbl_size++;  in nfs4_client_to_reclaim()
7219 	list_del(&crp->cr_strhash);  in nfs4_remove_reclaim_record()
7220 	kfree(crp->cr_name.data);  in nfs4_remove_reclaim_record()
7221 	kfree(crp->cr_princhash.data);  in nfs4_remove_reclaim_record()
7223 	nn->reclaim_str_hashtbl_size--;  in nfs4_remove_reclaim_record()
7233 		while (!list_empty(&nn->reclaim_str_hashtbl[i])) {  in nfs4_release_reclaim()
7234 			crp = list_entry(nn->reclaim_str_hashtbl[i].next,  in nfs4_release_reclaim()
7239 	WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);  in nfs4_release_reclaim()
7251 	list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {  in nfsd4_find_reclaim_client()
7252 		if (compare_blob(&crp->cr_name, &name) == 0) {  in nfsd4_find_reclaim_client()
7274 	if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))  in nfs4_check_open_reclaim()
7277 	if (nfsd4_client_record_check(cstate->clp))  in nfs4_check_open_reclaim()
7301 	max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);  in set_max_delegations()
7309 	nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,  in nfs4_state_create_net()
7312 	if (!nn->conf_id_hashtbl)  in nfs4_state_create_net()
7314 	nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,  in nfs4_state_create_net()
7317 	if (!nn->unconf_id_hashtbl)  in nfs4_state_create_net()
7319 	nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE,  in nfs4_state_create_net()
7322 	if (!nn->sessionid_hashtbl)  in nfs4_state_create_net()
7326 		INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);  in nfs4_state_create_net()
7327 		INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);  in nfs4_state_create_net()
7330 		INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);  in nfs4_state_create_net()
7331 	nn->conf_name_tree = RB_ROOT;  in nfs4_state_create_net()
7332 	nn->unconf_name_tree = RB_ROOT;  in nfs4_state_create_net()
7333 	nn->boot_time = ktime_get_real_seconds();  in nfs4_state_create_net()
7334 	nn->grace_ended = false;  in nfs4_state_create_net()
7335 	nn->nfsd4_manager.block_opens = true;  in nfs4_state_create_net()
7336 	INIT_LIST_HEAD(&nn->nfsd4_manager.list);  in nfs4_state_create_net()
7337 	INIT_LIST_HEAD(&nn->client_lru);  in nfs4_state_create_net()
7338 	INIT_LIST_HEAD(&nn->close_lru);  in nfs4_state_create_net()
7339 	INIT_LIST_HEAD(&nn->del_recall_lru);  in nfs4_state_create_net()
7340 	spin_lock_init(&nn->client_lock);  in nfs4_state_create_net()
7341 	spin_lock_init(&nn->s2s_cp_lock);  in nfs4_state_create_net()
7342 	idr_init(&nn->s2s_cp_stateids);  in nfs4_state_create_net()
7344 	spin_lock_init(&nn->blocked_locks_lock);  in nfs4_state_create_net()
7345 	INIT_LIST_HEAD(&nn->blocked_locks_lru);  in nfs4_state_create_net()
7347 	INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);  in nfs4_state_create_net()
7353 	kfree(nn->unconf_id_hashtbl);  in nfs4_state_create_net()
7355 	kfree(nn->conf_id_hashtbl);  in nfs4_state_create_net()
7357 	return -ENOMEM;  in nfs4_state_create_net()
7368 		while (!list_empty(&nn->conf_id_hashtbl[i])) {  in nfs4_state_destroy_net()
7369 			clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);  in nfs4_state_destroy_net()
7374 	WARN_ON(!list_empty(&nn->blocked_locks_lru));  in nfs4_state_destroy_net()
7377 		while (!list_empty(&nn->unconf_id_hashtbl[i])) {  in nfs4_state_destroy_net()
7378 			clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);  in nfs4_state_destroy_net()
7383 	kfree(nn->sessionid_hashtbl);  in nfs4_state_destroy_net()
7384 	kfree(nn->unconf_id_hashtbl);  in nfs4_state_destroy_net()
7385 	kfree(nn->conf_id_hashtbl);  in nfs4_state_destroy_net()
7398 	locks_start_grace(net, &nn->nfsd4_manager);  in nfs4_state_start_net()
7400 	if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)  in nfs4_state_start_net()
7402 	printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n",  in nfs4_state_start_net()
7403 	       nn->nfsd4_grace, net->ns.inum);  in nfs4_state_start_net()
7405 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);  in nfs4_state_start_net()
7410 			net->ns.inum);  in nfs4_state_start_net()
7411 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);  in nfs4_state_start_net()
7425 		ret = -ENOMEM;  in nfs4_state_start()
7448 	cancel_delayed_work_sync(&nn->laundromat_work);  in nfs4_state_shutdown_net()
7449 	locks_end_grace(&nn->nfsd4_manager);  in nfs4_state_shutdown_net()
7453 	list_for_each_safe(pos, next, &nn->del_recall_lru) {  in nfs4_state_shutdown_net()
7456 		list_add(&dp->dl_recall_lru, &reaplist);  in nfs4_state_shutdown_net()
7461 		list_del_init(&dp->dl_recall_lru);  in nfs4_state_shutdown_net()
7481 		memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));  in get_stateid()
7487 	if (cstate->minorversion) {  in put_stateid()
7488 		memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));  in put_stateid()
7506 	put_stateid(cstate, &u->open_downgrade.od_stateid);  in nfsd4_set_opendowngradestateid()
7513 	put_stateid(cstate, &u->open.op_stateid);  in nfsd4_set_openstateid()
7520 	put_stateid(cstate, &u->close.cl_stateid);  in nfsd4_set_closestateid()
7527 	put_stateid(cstate, &u->lock.lk_resp_stateid);  in nfsd4_set_lockstateid()
7538 	get_stateid(cstate, &u->open_downgrade.od_stateid);  in nfsd4_get_opendowngradestateid()
7545 	get_stateid(cstate, &u->delegreturn.dr_stateid);  in nfsd4_get_delegreturnstateid()
7552 	get_stateid(cstate, &u->free_stateid.fr_stateid);  in nfsd4_get_freestateid()
7559 	get_stateid(cstate, &u->setattr.sa_stateid);  in nfsd4_get_setattrstateid()
7566 	get_stateid(cstate, &u->close.cl_stateid);  in nfsd4_get_closestateid()
7573 	get_stateid(cstate, &u->locku.lu_stateid);  in nfsd4_get_lockustateid()
7580 	get_stateid(cstate, &u->read.rd_stateid);  in nfsd4_get_readstateid()
7587 	get_stateid(cstate, &u->write.wr_stateid);  in nfsd4_get_writestateid()