Attachment 14184 Details for Bug 13362 – Patch

[patch] Patch

patch.txt (text/plain), 3.85 KB, created by Volker Lendecke on 2018-05-09 06:05:43 UTC

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Creator: Volker Lendecke

Created: 2018-05-09 06:05:43 UTC

Size: 3.85 KB

patch

obsolete

>From 765a078a2877591026d4e0a0a61a86346ef6f0b2 Mon Sep 17 00:00:00 2001
>From: Volker Lendecke <vl@samba.org>
>Date: Mon, 7 May 2018 16:41:55 +0200
>Subject: [PATCH 1/2] lib: Put "results_store" into a doubly linked list
>
>Signed-off-by: Volker Lendecke <vl@samba.org>
>---
> lib/ldb/modules/paged_results.c | 25 +++++--------------------
> 1 file changed, 5 insertions(+), 20 deletions(-)
>
>diff --git a/lib/ldb/modules/paged_results.c b/lib/ldb/modules/paged_results.c
>index de014a39699..aafbcbf4483 100644
>--- a/lib/ldb/modules/paged_results.c
>+++ b/lib/ldb/modules/paged_results.c
>@@ -35,6 +35,7 @@
> #include "replace.h"
> #include "system/filesys.h"
> #include "system/time.h"
>+#include "dlinklist.h"
> #include "ldb_module.h"
> 
> struct message_store {
>@@ -48,14 +49,13 @@ struct message_store {
> struct private_data;
> 
> struct results_store {
>+	struct results_store *prev, *next;
> 
> 	struct private_data *priv;
> 
> 	char *cookie;
> 	time_t timestamp;
> 
>-	struct results_store *next;
>-
> 	struct message_store *first;
> 	struct message_store *last;
> 	int num_entries;
>@@ -75,22 +75,8 @@ struct private_data {
> static int store_destructor(struct results_store *del)
> {
> 	struct private_data *priv = del->priv;
>-	struct results_store *loop;
>-
>-	if (priv->store == del) {
>-		priv->store = del->next;
>-		return 0;
>-	}
>-
>-	for (loop = priv->store; loop; loop = loop->next) {
>-		if (loop->next == del) {
>-			loop->next = del->next;
>-			return 0;
>-		}
>-	}
>-
>-	/* is not in list ? */
>-	return -1;
>+	DLIST_REMOVE(priv->store, del);
>+	return 0;
> }
> 
> static struct results_store *new_store(struct private_data *priv)
>@@ -120,8 +106,7 @@ static struct results_store *new_store(struct private_data *priv)
> 	newr->first_ref = NULL;
> 	newr->controls = NULL;
> 
>-	newr->next = priv->store;
>-	priv->store = newr;
>+	DLIST_ADD(priv->store, newr);
> 
> 	talloc_set_destructor(newr, store_destructor);
> 
>-- 
>2.11.0
>
>
>From dbf699b017b968bfe91dc3278ad372dac998015f Mon Sep 17 00:00:00 2001
>From: Volker Lendecke <vl@samba.org>
>Date: Mon, 7 May 2018 16:53:00 +0200
>Subject: [PATCH 2/2] lib: Hold at most 10 outstanding paged result cookies
>
>Signed-off-by: Volker Lendecke <vl@samba.org>
>---
> lib/ldb/modules/paged_results.c | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
>diff --git a/lib/ldb/modules/paged_results.c b/lib/ldb/modules/paged_results.c
>index aafbcbf4483..ecb22271d28 100644
>--- a/lib/ldb/modules/paged_results.c
>+++ b/lib/ldb/modules/paged_results.c
>@@ -36,6 +36,7 @@
> #include "system/filesys.h"
> #include "system/time.h"
> #include "dlinklist.h"
>+#include <assert.h>
> #include "ldb_module.h"
> 
> struct message_store {
>@@ -68,6 +69,7 @@ struct results_store {
> 
> struct private_data {
> 	uint32_t next_free_id;
>+	size_t num_stores;
> 	struct results_store *store;
> 	
> };
>@@ -76,6 +78,10 @@ static int store_destructor(struct results_store *del)
> {
> 	struct private_data *priv = del->priv;
> 	DLIST_REMOVE(priv->store, del);
>+
>+	assert(priv->num_stores > 0);
>+	priv->num_stores -= 1;
>+
> 	return 0;
> }
> 
>@@ -108,8 +114,21 @@ static struct results_store *new_store(struct private_data *priv)
> 
> 	DLIST_ADD(priv->store, newr);
> 
>+	assert(priv->num_stores < SIZE_MAX);
>+	priv->num_stores += 1;
>+
> 	talloc_set_destructor(newr, store_destructor);
> 
>+	if (priv->num_stores > 10) {
>+		struct results_store *last;
>+		/*
>+		 * 10 is the default for MaxResultSetsPerConn --
>+		 * possibly need to parameterize it.
>+		 */
>+		last = DLIST_TAIL(priv->store);
>+		TALLOC_FREE(last);
>+	}
>+
> 	return newr;
> }
> 
>@@ -366,6 +385,8 @@ static int paged_search(struct ldb_module *module, struct ldb_request *req)
> 			return LDB_ERR_UNWILLING_TO_PERFORM;
> 		}
> 
>+		DLIST_PROMOTE(private_data->store, current);
>+
> 		ac->store = current;
> 
> 		/* check if it is an abandon */
>@@ -397,6 +418,7 @@ static int paged_request_init(struct ldb_module *module)
> 	}
> 
> 	data->next_free_id = 1;
>+	data->num_stores = 0;
> 	data->store = NULL;
> 	ldb_module_set_private(module, data);
> 
>-- 
>2.11.0
>

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