89 		    struct nfsd_net *nn)  in nfsd_cacherep_alloc()  argument
136 nfsd_cacherep_unlink_locked(struct nfsd_net *nn, struct nfsd_drc_bucket *b,  in nfsd_cacherep_unlink_locked()  argument
140 		nfsd_stats_drc_mem_usage_sub(nn, rp->c_replvec.iov_len);  in nfsd_cacherep_unlink_locked()
144 		atomic_dec(&nn->num_drc_entries);  in nfsd_cacherep_unlink_locked()
145 		nfsd_stats_drc_mem_usage_sub(nn, sizeof(*rp));  in nfsd_cacherep_unlink_locked()
151 				struct nfsd_net *nn)  in nfsd_reply_cache_free_locked()  argument
153 	nfsd_cacherep_unlink_locked(nn, b, rp);  in nfsd_reply_cache_free_locked()
159 			struct nfsd_net *nn)  in nfsd_reply_cache_free()  argument
162 	nfsd_cacherep_unlink_locked(nn, b, rp);  in nfsd_reply_cache_free()
179 int nfsd_reply_cache_init(struct nfsd_net *nn)  in nfsd_reply_cache_init()  argument
185 	nn->max_drc_entries = nfsd_cache_size_limit();  in nfsd_reply_cache_init()
186 	atomic_set(&nn->num_drc_entries, 0);  in nfsd_reply_cache_init()
187 	hashsize = nfsd_hashsize(nn->max_drc_entries);  in nfsd_reply_cache_init()
188 	nn->maskbits = ilog2(hashsize);  in nfsd_reply_cache_init()
190 	nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan;  in nfsd_reply_cache_init()
191 	nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count;  in nfsd_reply_cache_init()
192 	nn->nfsd_reply_cache_shrinker.seeks = 1;  in nfsd_reply_cache_init()
193 	status = register_shrinker(&nn->nfsd_reply_cache_shrinker,  in nfsd_reply_cache_init()
194 				   "nfsd-reply:%s", nn->nfsd_name);  in nfsd_reply_cache_init()
198 	nn->drc_hashtbl = kvzalloc(array_size(hashsize,  in nfsd_reply_cache_init()
199 				sizeof(*nn->drc_hashtbl)), GFP_KERNEL);  in nfsd_reply_cache_init()
200 	if (!nn->drc_hashtbl)  in nfsd_reply_cache_init()
204 		INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head);  in nfsd_reply_cache_init()
205 		spin_lock_init(&nn->drc_hashtbl[i].cache_lock);  in nfsd_reply_cache_init()
207 	nn->drc_hashsize = hashsize;  in nfsd_reply_cache_init()
211 	unregister_shrinker(&nn->nfsd_reply_cache_shrinker);  in nfsd_reply_cache_init()
216 void nfsd_reply_cache_shutdown(struct nfsd_net *nn)  in nfsd_reply_cache_shutdown()  argument
221 	unregister_shrinker(&nn->nfsd_reply_cache_shrinker);  in nfsd_reply_cache_shutdown()
223 	for (i = 0; i < nn->drc_hashsize; i++) {  in nfsd_reply_cache_shutdown()
224 		struct list_head *head = &nn->drc_hashtbl[i].lru_head;  in nfsd_reply_cache_shutdown()
227 			nfsd_reply_cache_free_locked(&nn->drc_hashtbl[i],  in nfsd_reply_cache_shutdown()
228 									rp, nn);  in nfsd_reply_cache_shutdown()
232 	kvfree(nn->drc_hashtbl);  in nfsd_reply_cache_shutdown()
233 	nn->drc_hashtbl = NULL;  in nfsd_reply_cache_shutdown()
234 	nn->drc_hashsize = 0;  in nfsd_reply_cache_shutdown()
250 nfsd_cache_bucket_find(__be32 xid, struct nfsd_net *nn)  in nfsd_cache_bucket_find()  argument
252 	unsigned int hash = hash_32((__force u32)xid, nn->maskbits);  in nfsd_cache_bucket_find()
254 	return &nn->drc_hashtbl[hash];  in nfsd_cache_bucket_find()
262 nfsd_prune_bucket_locked(struct nfsd_net *nn, struct nfsd_drc_bucket *b,  in nfsd_prune_bucket_locked()  argument
280 		if (atomic_read(&nn->num_drc_entries) <= nn->max_drc_entries &&  in nfsd_prune_bucket_locked()
284 		nfsd_cacherep_unlink_locked(nn, b, rp);  in nfsd_prune_bucket_locked()
305 	struct nfsd_net *nn = container_of(shrink,  in nfsd_reply_cache_count()  local
308 	return atomic_read(&nn->num_drc_entries);  in nfsd_reply_cache_count()
325 	struct nfsd_net *nn = container_of(shrink,  in nfsd_reply_cache_scan()  local
331 	for (i = 0; i < nn->drc_hashsize; i++) {  in nfsd_reply_cache_scan()
332 		struct nfsd_drc_bucket *b = &nn->drc_hashtbl[i];  in nfsd_reply_cache_scan()
338 		nfsd_prune_bucket_locked(nn, b, 0, &dispose);  in nfsd_reply_cache_scan()
346 	trace_nfsd_drc_gc(nn, freed);  in nfsd_reply_cache_scan()
404 		   const struct nfsd_cacherep *rp, struct nfsd_net *nn)  in nfsd_cache_key_cmp()  argument
408 		nfsd_stats_payload_misses_inc(nn);  in nfsd_cache_key_cmp()
409 		trace_nfsd_drc_mismatch(nn, key, rp);  in nfsd_cache_key_cmp()
422 			struct nfsd_net *nn)  in nfsd_cache_insert()  argument
435 		cmp = nfsd_cache_key_cmp(key, rp, nn);  in nfsd_cache_insert()
449 	if (entries > nn->longest_chain) {  in nfsd_cache_insert()
450 		nn->longest_chain = entries;  in nfsd_cache_insert()
451 		nn->longest_chain_cachesize = atomic_read(&nn->num_drc_entries);  in nfsd_cache_insert()
452 	} else if (entries == nn->longest_chain) {  in nfsd_cache_insert()
454 		nn->longest_chain_cachesize = min_t(unsigned int,  in nfsd_cache_insert()
455 				nn->longest_chain_cachesize,  in nfsd_cache_insert()
456 				atomic_read(&nn->num_drc_entries));  in nfsd_cache_insert()
484 	struct nfsd_net		*nn = net_generic(SVC_NET(rqstp), nfsd_net_id);  in nfsd_cache_lookup()  local
494 		nfsd_stats_rc_nocache_inc(nn);  in nfsd_cache_lookup()
504 	rp = nfsd_cacherep_alloc(rqstp, csum, nn);  in nfsd_cache_lookup()
508 	b = nfsd_cache_bucket_find(rqstp->rq_xid, nn);  in nfsd_cache_lookup()
510 	found = nfsd_cache_insert(b, rp, nn);  in nfsd_cache_lookup()
515 	nfsd_prune_bucket_locked(nn, b, 3, &dispose);  in nfsd_cache_lookup()
519 	trace_nfsd_drc_gc(nn, freed);  in nfsd_cache_lookup()
521 	nfsd_stats_rc_misses_inc(nn);  in nfsd_cache_lookup()
522 	atomic_inc(&nn->num_drc_entries);  in nfsd_cache_lookup()
523 	nfsd_stats_drc_mem_usage_add(nn, sizeof(*rp));  in nfsd_cache_lookup()
528 	nfsd_reply_cache_free_locked(NULL, rp, nn);  in nfsd_cache_lookup()
529 	nfsd_stats_rc_hits_inc(nn);  in nfsd_cache_lookup()
561 	trace_nfsd_drc_found(nn, rqstp, rtn);  in nfsd_cache_lookup()
592 	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);  in nfsd_cache_update()  local
601 	b = nfsd_cache_bucket_find(rp->c_key.k_xid, nn);  in nfsd_cache_update()
608 		nfsd_reply_cache_free(b, rp, nn);  in nfsd_cache_update()
623 			nfsd_reply_cache_free(b, rp, nn);  in nfsd_cache_update()
630 		nfsd_reply_cache_free(b, rp, nn);  in nfsd_cache_update()
634 	nfsd_stats_drc_mem_usage_add(nn, bufsize);  in nfsd_cache_update()
663 	struct nfsd_net *nn = net_generic(file_inode(m->file)->i_sb->s_fs_info,  in nfsd_reply_cache_stats_show()  local
666 	seq_printf(m, "max entries:           %u\n", nn->max_drc_entries);  in nfsd_reply_cache_stats_show()
668 		   atomic_read(&nn->num_drc_entries));  in nfsd_reply_cache_stats_show()
669 	seq_printf(m, "hash buckets:          %u\n", 1 << nn->maskbits);  in nfsd_reply_cache_stats_show()
671 		   percpu_counter_sum_positive(&nn->counter[NFSD_STATS_DRC_MEM_USAGE]));  in nfsd_reply_cache_stats_show()
673 		   percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]));  in nfsd_reply_cache_stats_show()
675 		   percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]));  in nfsd_reply_cache_stats_show()
677 		   percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]));  in nfsd_reply_cache_stats_show()
679 		   percpu_counter_sum_positive(&nn->counter[NFSD_STATS_PAYLOAD_MISSES]));  in nfsd_reply_cache_stats_show()
680 	seq_printf(m, "longest chain len:     %u\n", nn->longest_chain);  in nfsd_reply_cache_stats_show()
681 	seq_printf(m, "cachesize at longest:  %u\n", nn->longest_chain_cachesize);  in nfsd_reply_cache_stats_show()