MINOR: filters: Extract proxy stuff from the struct filter

Now, filter's configuration (.id, .conf and .ops fields) is stored in the
structure 'flt_conf'. So proxies own a flt_conf list instead of a filter
list. When a filter is attached to a stream, it gets a pointer on its
configuration. This avoids mixing the filter's context (owns by a stream) and
its configuration (owns by a proxy). It also saves 2 pointers per filter
instance.
diff --git a/include/proto/filters.h b/include/proto/filters.h
index e4061a7..f9b0fb0 100644
--- a/include/proto/filters.h
+++ b/include/proto/filters.h
@@ -29,6 +29,10 @@
 
 #include <proto/channel.h>
 
+#define FLT_ID(flt)   (flt)->config->id
+#define FLT_CONF(flt) (flt)->config->conf
+#define FLT_OPS(flt)  (flt)->config->ops
+
 /* Useful macros to access per-channel values. It can be safely used inside
  * filters. */
 #define CHN_IDX(chn)     (((chn)->flags & CF_ISRESP) == CF_ISRESP)
diff --git a/include/types/filters.h b/include/types/filters.h
index c433078..8446946 100644
--- a/include/types/filters.h
+++ b/include/types/filters.h
@@ -28,6 +28,7 @@
 struct proxy;
 struct stream;
 struct channel;
+struct flt_conf;
 struct filter;
 
 /* Descriptor for a "filter" keyword. The ->parse() function returns 0 in case
@@ -40,7 +41,7 @@
 struct flt_kw {
 	const char *kw;
 	int (*parse)(char **args, int *cur_arg, struct proxy *px,
-		     struct filter *filter, char **err);
+		     struct flt_conf *fconf, char **err);
 };
 
 /*
@@ -123,9 +124,9 @@
 	/*
 	 * Callbacks to manage the filter lifecycle
 	 */
-	int  (*init)  (struct proxy *p, struct filter *f);
-	void (*deinit)(struct proxy *p, struct filter *f);
-	int  (*check) (struct proxy *p, struct filter *f);
+	int  (*init)  (struct proxy *p, struct flt_conf *fconf);
+	void (*deinit)(struct proxy *p, struct flt_conf *fconf);
+	int  (*check) (struct proxy *p, struct flt_conf *fconf);
 
 	/*
 	 * Stream callbacks
@@ -171,9 +172,18 @@
 #define STRM_FLT_FL_HAS_FILTERS          0x0001 /* The stream has at least one filter */
 
 /*
- * Structure representing the state of a filter. When attached to a proxy, only
- * <ops> and <conf> field (and optionnaly <id>) are set. All other fields are
- * used when the filter is attached to a stream.
+ * Structure representing the filter configuration, attached to a proxy and
+ * accessible from a filter when instantiated in a stream
+ */
+struct flt_conf {
+	const char     *id;   /* The filter id */
+	struct flt_ops *ops;  /* The filter callbacks */
+	void           *conf; /* The filter configuration */
+	struct list     list; /* Next filter for the same proxy */
+};
+
+/*
+ * Structure reprensenting a filter instance attached to a stream
  *
  * 2D-Array fields are used to store info per channel. The first index stands
  * for the request channel, and the second one for the response channel.
@@ -182,9 +192,7 @@
  * access these values using FLT_NXT and FLT_FWD macros.
  */
 struct filter {
-	const char     *id;                /* The filter id */
-	struct flt_ops *ops;               /* The filter callbacks */
-	void           *conf;              /* The filter configuration */
+	struct flt_conf *config;           /* the filter's configuration */
 	void           *ctx;               /* The filter context (opaque) */
 	unsigned short  flags;             /* FLT_FL_* */
 	unsigned int    next[2];           /* Offset, relative to buf->p, to the next byte to parse for a specific channel
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 71fd35d..79a3411 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -432,8 +432,7 @@
 						 * this backend. If not specified or void, then the backend
 						 * name is used
 						 */
-
-	struct list filters;
+	struct list filter_configs;		/* list of the filters that are declared on this proxy */
 };
 
 struct switching_rule {
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 55622a4..68cee26 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -8435,7 +8435,7 @@
 			curproxy->fe_req_ana |= AN_REQ_SWITCHING_RULES;
 
 			/* Add filters analyzers if needed */
-			if (!LIST_ISEMPTY(&curproxy->filters)) {
+			if (!LIST_ISEMPTY(&curproxy->filter_configs)) {
 				curproxy->fe_req_ana |= AN_FLT_ALL_FE;
 				curproxy->fe_rsp_ana |= AN_FLT_ALL_FE;
 				if (curproxy->mode == PR_MODE_HTTP) {
@@ -8465,7 +8465,7 @@
 				curproxy->be_req_ana |= AN_REQ_PRST_RDP_COOKIE;
 
 			/* Add filters analyzers if needed */
-			if (!LIST_ISEMPTY(&curproxy->filters)) {
+			if (!LIST_ISEMPTY(&curproxy->filter_configs)) {
 				curproxy->be_req_ana |= AN_FLT_ALL_BE;
 				curproxy->be_rsp_ana |= AN_FLT_ALL_BE;
 				if (curproxy->mode == PR_MODE_HTTP) {
diff --git a/src/filters.c b/src/filters.c
index 1ab2b37..420ad80 100644
--- a/src/filters.c
+++ b/src/filters.c
@@ -158,7 +158,7 @@
 parse_filter(char **args, int section_type, struct proxy *curpx,
 	     struct proxy *defpx, const char *file, int line, char **err)
 {
-	struct filter *filter = NULL;
+	struct flt_conf *fconf = NULL;
 
 	/* Filter cannot be defined on a default proxy */
 	if (curpx == defpx) {
@@ -176,12 +176,11 @@
 				  file, line, args[0], proxy_type_str(curpx), curpx->id);
 			goto error;
 		}
-		filter = pool_alloc2(pool2_filter);
-		if (!filter) {
+		fconf = calloc(1, sizeof(*fconf));
+		if (!fconf) {
 			memprintf(err, "'%s' : out of memory", args[0]);
 			goto error;
 		}
-		memset(filter, 0, sizeof(*filter));
 
 		cur_arg = 1;
 		kw = flt_find_kw(args[cur_arg]);
@@ -192,7 +191,7 @@
 					  file, line, args[0], args[cur_arg]);
 				goto error;
 			}
-			if (kw->parse(args, &cur_arg, curpx, filter, err) != 0) {
+			if (kw->parse(args, &cur_arg, curpx, fconf, err) != 0) {
 				if (err && *err)
 					memprintf(err, "'%s' : '%s'",
 						  args[0], *err);
@@ -216,13 +215,12 @@
 			goto error;
 		}
 
-		LIST_ADDQ(&curpx->filters, &filter->list);
+		LIST_ADDQ(&curpx->filter_configs, &fconf->list);
 	}
 	return 0;
 
   error:
-	if (filter)
-		pool_free2(pool2_filter, filter);
+	free(fconf);
 	return -1;
 
 
@@ -236,10 +234,10 @@
 int
 flt_init(struct proxy *proxy)
 {
-	struct filter *filter;
+	struct flt_conf *fconf;
 
-	list_for_each_entry(filter, &proxy->filters, list) {
-		if (filter->ops->init && filter->ops->init(proxy, filter) < 0)
+	list_for_each_entry(fconf, &proxy->filter_configs, list) {
+		if (fconf->ops->init && fconf->ops->init(proxy, fconf) < 0)
 			return ERR_ALERT|ERR_FATAL;
 	}
 	return 0;
@@ -253,12 +251,12 @@
 int
 flt_check(struct proxy *proxy)
 {
-	struct filter *filter;
-	int            err = 0;
+	struct flt_conf *fconf;
+	int err = 0;
 
-	list_for_each_entry(filter, &proxy->filters, list) {
-		if (filter->ops->check)
-			err += filter->ops->check(proxy, filter);
+	list_for_each_entry(fconf, &proxy->filter_configs, list) {
+		if (fconf->ops->check)
+			err += fconf->ops->check(proxy, fconf);
 	}
 	err += check_legacy_http_comp_flt(proxy);
 	return err;
@@ -271,27 +269,25 @@
 void
 flt_deinit(struct proxy *proxy)
 {
-	struct filter *filter, *back;
+	struct flt_conf *fconf, *back;
 
-	list_for_each_entry_safe(filter, back, &proxy->filters, list) {
-		if (filter->ops->deinit)
-			filter->ops->deinit(proxy, filter);
-		LIST_DEL(&filter->list);
-		pool_free2(pool2_filter, filter);
+	list_for_each_entry_safe(fconf, back, &proxy->filter_configs, list) {
+		if (fconf->ops->deinit)
+			fconf->ops->deinit(proxy, fconf);
+		LIST_DEL(&fconf->list);
+		free(fconf);
 	}
 }
 
 /* Attaches a filter to a stream. Returns -1 if an error occurs, 0 otherwise. */
 static int
-flt_stream_add_filter(struct stream *s, struct filter *filter, unsigned int flags)
+flt_stream_add_filter(struct stream *s, struct flt_conf *fconf, unsigned int flags)
 {
 	struct filter *f = pool_alloc2(pool2_filter);
 	if (!f) /* not enough memory */
 		return -1;
 	memset(f, 0, sizeof(*f));
-	f->id    = filter->id;
-	f->ops   = filter->ops;
-	f->conf  = filter->conf;
+	f->config = fconf;
 	f->flags |= flags;
 	LIST_ADDQ(&strm_flt(s)->filters, &f->list);
 	strm_flt(s)->flags |= STRM_FLT_FL_HAS_FILTERS;
@@ -305,12 +301,12 @@
 int
 flt_stream_init(struct stream *s)
 {
-	struct filter *filter;
+	struct flt_conf *fconf;
 
 	memset(strm_flt(s), 0, sizeof(*strm_flt(s)));
 	LIST_INIT(&strm_flt(s)->filters);
-	list_for_each_entry(filter, &strm_fe(s)->filters, list) {
-		if (flt_stream_add_filter(s, filter, 0) < 0)
+	list_for_each_entry(fconf, &strm_fe(s)->filter_configs, list) {
+		if (flt_stream_add_filter(s, fconf, 0) < 0)
 			return -1;
 	}
 	return 0;
@@ -348,7 +344,7 @@
 	struct filter *filter;
 
 	list_for_each_entry(filter, &strm_flt(s)->filters, list) {
-		if (filter->ops->stream_start && filter->ops->stream_start(s, filter) < 0)
+		if (FLT_OPS(filter)->stream_start && FLT_OPS(filter)->stream_start(s, filter) < 0)
 			return -1;
 	}
 	return 0;
@@ -364,8 +360,8 @@
 	struct filter *filter;
 
 	list_for_each_entry(filter, &strm_flt(s)->filters, list) {
-		if (filter->ops->stream_stop)
-			filter->ops->stream_stop(s, filter);
+		if (FLT_OPS(filter)->stream_stop)
+			FLT_OPS(filter)->stream_stop(s, filter);
 	}
 }
 
@@ -377,13 +373,13 @@
 int
 flt_set_stream_backend(struct stream *s, struct proxy *be)
 {
-	struct filter *filter;
+	struct flt_conf *fconf;
 
 	if (strm_fe(s) == be)
 		return 0;
 
-	list_for_each_entry(filter, &be->filters, list) {
-		if (flt_stream_add_filter(s, filter, FLT_FL_IS_BACKEND_FILTER) < 0)
+	list_for_each_entry(fconf, &be->filter_configs, list) {
+		if (flt_stream_add_filter(s, fconf, FLT_FL_IS_BACKEND_FILTER) < 0)
 			return -1;
 	}
 	return 0;
@@ -423,8 +419,8 @@
 		if (msg->next > *nxt)
 			*nxt = msg->next;
 
-		if (filter->ops->http_data) {
-			ret = filter->ops->http_data(s, filter, msg);
+		if (FLT_OPS(filter)->http_data) {
+			ret = FLT_OPS(filter)->http_data(s, filter, msg);
 			if (ret < 0)
 				break;
 
@@ -477,8 +473,8 @@
 		nxt = &FLT_NXT(filter, msg->chn);
 		*nxt = msg->next;
 
-		if (filter->ops->http_chunk_trailers) {
-			ret = filter->ops->http_chunk_trailers(s, filter, msg);
+		if (FLT_OPS(filter)->http_chunk_trailers) {
+			ret = FLT_OPS(filter)->http_chunk_trailers(s, filter, msg);
 			if (ret < 0)
 				break;
 		}
@@ -502,8 +498,8 @@
 	int ret = 1;
 
 	RESUME_FILTER_LOOP(s, msg->chn) {
-		if (filter->ops->http_end) {
-			ret = filter->ops->http_end(s, filter, msg);
+		if (FLT_OPS(filter)->http_end) {
+			ret = FLT_OPS(filter)->http_end(s, filter, msg);
 			if (ret <= 0)
 				BREAK_EXECUTION(s, msg->chn, end);
 		}
@@ -522,8 +518,8 @@
 	struct filter *filter;
 
 	list_for_each_entry(filter, &strm_flt(s)->filters, list) {
-		if (filter->ops->http_reset)
-			filter->ops->http_reset(s, filter, msg);
+		if (FLT_OPS(filter)->http_reset)
+			FLT_OPS(filter)->http_reset(s, filter, msg);
 	}
 }
 
@@ -537,8 +533,8 @@
 	struct filter *filter;
 
 	list_for_each_entry(filter, &strm_flt(s)->filters, list) {
-		if (filter->ops->http_reply)
-			filter->ops->http_reply(s, filter, status, msg);
+		if (FLT_OPS(filter)->http_reply)
+			FLT_OPS(filter)->http_reply(s, filter, status, msg);
 	}
 }
 
@@ -572,10 +568,10 @@
 		if (msg->next > *nxt)
 			*nxt = msg->next;
 
-		if (filter->ops->http_forward_data) {
+		if (FLT_OPS(filter)->http_forward_data) {
 			/* Remove bytes that the current filter considered as
 			 * forwarded */
-			ret = filter->ops->http_forward_data(s, filter, msg, ret - *fwd);
+			ret = FLT_OPS(filter)->http_forward_data(s, filter, msg, ret - *fwd);
 			if (ret < 0)
 				goto end;
 		}
@@ -628,8 +624,8 @@
 		FLT_NXT(filter, chn) = 0;
 		FLT_FWD(filter, chn) = 0;
 
-		if (filter->ops->channel_start_analyze) {
-			ret = filter->ops->channel_start_analyze(s, filter, chn);
+		if (FLT_OPS(filter)->channel_start_analyze) {
+			ret = FLT_OPS(filter)->channel_start_analyze(s, filter, chn);
 			if (ret <= 0)
 				BREAK_EXECUTION(s, chn, end);
 		}
@@ -652,8 +648,8 @@
 	int ret = 1;
 
 	RESUME_FILTER_LOOP(s, chn) {
-		if (filter->ops->channel_analyze) {
-			ret = filter->ops->channel_analyze(s, filter, chn, an_bit);
+		if (FLT_OPS(filter)->channel_analyze) {
+			ret = FLT_OPS(filter)->channel_analyze(s, filter, chn, an_bit);
 			if (ret <= 0)
 				BREAK_EXECUTION(s, chn, check_result);
 		}
@@ -676,8 +672,8 @@
 	int            ret = 1;
 
 	RESUME_FILTER_LOOP(s, chn) {
-		if (filter->ops->channel_analyze) {
-			ret = filter->ops->channel_analyze(s, filter, chn, an_bit);
+		if (FLT_OPS(filter)->channel_analyze) {
+			ret = FLT_OPS(filter)->channel_analyze(s, filter, chn, an_bit);
 			if (ret <= 0)
 				BREAK_EXECUTION(s, chn, check_result);
 		}
@@ -717,8 +713,8 @@
 		FLT_FWD(filter, chn) = 0;
 		unregister_data_filter(s, chn, filter);
 
-		if (filter->ops->channel_end_analyze) {
-			ret = filter->ops->channel_end_analyze(s, filter, chn);
+		if (FLT_OPS(filter)->channel_end_analyze) {
+			ret = FLT_OPS(filter)->channel_end_analyze(s, filter, chn);
 			if (ret <= 0)
 				BREAK_EXECUTION(s, chn, end);
 		}
@@ -778,8 +774,8 @@
 			continue;
 
 		nxt = &FLT_NXT(filter, chn);
-		if (filter->ops->tcp_data) {
-			ret = filter->ops->tcp_data(s, filter, chn);
+		if (FLT_OPS(filter)->tcp_data) {
+			ret = FLT_OPS(filter)->tcp_data(s, filter, chn);
 			if (ret < 0)
 				break;
 
@@ -830,10 +826,10 @@
 			continue;
 
 		fwd = &FLT_FWD(filter, chn);
-		if (filter->ops->tcp_forward_data) {
+		if (FLT_OPS(filter)->tcp_forward_data) {
 			/* Remove bytes that the current filter considered as
 			 * forwarded */
-			ret = filter->ops->tcp_forward_data(s, filter, chn, ret - *fwd);
+			ret = FLT_OPS(filter)->tcp_forward_data(s, filter, chn, ret - *fwd);
 			if (ret < 0)
 				goto end;
 		}
diff --git a/src/flt_http_comp.c b/src/flt_http_comp.c
index d9a1338..46abe52 100644
--- a/src/flt_http_comp.c
+++ b/src/flt_http_comp.c
@@ -62,7 +62,7 @@
 
 /***********************************************************************/
 static int
-comp_flt_init(struct proxy *px, struct filter *filter)
+comp_flt_init(struct proxy *px, struct flt_conf *fconf)
 {
 
 	if (!tmpbuf->size && b_alloc(&tmpbuf) == NULL)
@@ -73,7 +73,7 @@
 }
 
 static void
-comp_flt_deinit(struct proxy *px, struct filter *filter)
+comp_flt_deinit(struct proxy *px, struct flt_conf *fconf)
 {
 	if (tmpbuf->size)
 		b_free(&tmpbuf);
@@ -830,20 +830,20 @@
 
 static int
 parse_http_comp_flt(char **args, int *cur_arg, struct proxy *px,
-					 struct filter *filter, char **err)
+			 struct flt_conf *fconf, char **err)
 {
-	struct filter *flt, *back;
+	struct flt_conf *fc, *back;
 
-	list_for_each_entry_safe(flt, back, &px->filters, list) {
-		if (flt->id == http_comp_flt_id) {
+	list_for_each_entry_safe(fc, back, &px->filter_configs, list) {
+		if (fc->id == http_comp_flt_id) {
 			memprintf(err, "%s: Proxy supports only one compression filter\n", px->id);
 			return -1;
 		}
 	}
 
-	filter->id   = http_comp_flt_id;
-	filter->conf = NULL;
-	filter->ops  = &comp_ops;
+	fconf->id   = http_comp_flt_id;
+	fconf->conf = NULL;
+	fconf->ops  = &comp_ops;
 	(*cur_arg)++;
 
 	return 0;
@@ -853,14 +853,14 @@
 int
 check_legacy_http_comp_flt(struct proxy *proxy)
 {
-	struct filter *filter;
+	struct flt_conf *fconf;
 	int err = 0;
 
 	if (proxy->comp == NULL)
 		goto end;
-	if (!LIST_ISEMPTY(&proxy->filters)) {
-		list_for_each_entry(filter, &proxy->filters, list) {
-			if (filter->id == http_comp_flt_id)
+	if (!LIST_ISEMPTY(&proxy->filter_configs)) {
+		list_for_each_entry(fconf, &proxy->filter_configs, list) {
+			if (fconf->id == http_comp_flt_id)
 				goto end;
 		}
 		Alert("config: %s '%s': require an explicit filter declaration to use HTTP compression\n",
@@ -869,18 +869,17 @@
 		goto end;
 	}
 
-	filter = pool_alloc2(pool2_filter);
-	if (!filter) {
+	fconf = calloc(1, sizeof(*fconf));
+	if (!fconf) {
 		Alert("config: %s '%s': out of memory\n",
 		      proxy_type_str(proxy), proxy->id);
 		err++;
 		goto end;
 	}
-	memset(filter, 0, sizeof(*filter));
-	filter->id   = http_comp_flt_id;
-	filter->conf = NULL;
-	filter->ops  = &comp_ops;
-	LIST_ADDQ(&proxy->filters, &filter->list);
+	fconf->id   = http_comp_flt_id;
+	fconf->conf = NULL;
+	fconf->ops  = &comp_ops;
+	LIST_ADDQ(&proxy->filter_configs, &fconf->list);
 
  end:
 	return err;
@@ -916,7 +915,7 @@
 		return 0;
 
 	list_for_each_entry(filter, &strm_flt(smp->strm)->filters, list) {
-		if (filter->id != http_comp_flt_id)
+		if (FLT_ID(filter) != http_comp_flt_id)
 			continue;
 
 		if (!(st = filter->ctx))
diff --git a/src/flt_trace.c b/src/flt_trace.c
index 94664eb..a45f4a0 100644
--- a/src/flt_trace.c
+++ b/src/flt_trace.c
@@ -70,15 +70,15 @@
  **************************************************************************/
 /* Initialize the filter. Returns -1 on error, else 0. */
 static int
-trace_init(struct proxy *px, struct filter *filter)
+trace_init(struct proxy *px, struct flt_conf *fconf)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = fconf->conf;
 
 	if (conf->name)
 		memprintf(&conf->name, "%s/%s", conf->name, px->id);
 	else
 		memprintf(&conf->name, "TRACE/%s", px->id);
-	filter->conf = conf;
+	fconf->conf = conf;
 	TRACE(conf, "filter initialized [read random=%s - fwd random=%s]",
 	      (conf->rand_parsing ? "true" : "false"),
 	      (conf->rand_forwarding ? "true" : "false"));
@@ -87,22 +87,22 @@
 
 /* Free ressources allocated by the trace filter. */
 static void
-trace_deinit(struct proxy *px, struct filter *filter)
+trace_deinit(struct proxy *px, struct flt_conf *fconf)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = fconf->conf;
 
 	if (conf) {
 		TRACE(conf, "filter deinitialized");
 		free(conf->name);
 		free(conf);
 	}
-	filter->conf = NULL;
+	fconf->conf = NULL;
 }
 
 /* Check configuration of a trace filter for a specified proxy.
  * Return 1 on error, else 0. */
 static int
-trace_check(struct proxy *px, struct filter *filter)
+trace_check(struct proxy *px, struct flt_conf *fconf)
 {
 	return 0;
 }
@@ -114,7 +114,7 @@
 static int
 trace_stream_start(struct stream *s, struct filter *filter)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s",
 		   __FUNCTION__);
@@ -125,7 +125,7 @@
 static void
 trace_stream_stop(struct stream *s, struct filter *filter)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s",
 		   __FUNCTION__);
@@ -139,7 +139,7 @@
 trace_chn_start_analyze(struct stream *s, struct filter *filter,
 			struct channel *chn)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s: channel=%-10s - mode=%-5s (%s)",
 		   __FUNCTION__,
@@ -153,7 +153,7 @@
 trace_chn_analyze(struct stream *s, struct filter *filter,
 		  struct channel *chn, unsigned an_bit)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 	char                *ana;
 
 	switch (an_bit) {
@@ -236,7 +236,7 @@
 trace_chn_end_analyze(struct stream *s, struct filter *filter,
 		      struct channel *chn)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s: channel=%-10s - mode=%-5s (%s)",
 		   __FUNCTION__,
@@ -251,7 +251,7 @@
 trace_http_data(struct stream *s, struct filter *filter,
 		      struct http_msg *msg)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 	int avail = MIN(msg->chunk_len + msg->next, msg->chn->buf->i) - FLT_NXT(filter, msg->chn);
 	int ret   = avail;
 
@@ -273,7 +273,7 @@
 trace_http_chunk_trailers(struct stream *s, struct filter *filter,
 			  struct http_msg *msg)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s: channel=%-10s - mode=%-5s (%s)",
 		   __FUNCTION__,
@@ -285,7 +285,7 @@
 trace_http_end(struct stream *s, struct filter *filter,
 	       struct http_msg *msg)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s: channel=%-10s - mode=%-5s (%s)",
 		   __FUNCTION__,
@@ -297,7 +297,7 @@
 trace_http_reset(struct stream *s, struct filter *filter,
 		 struct http_msg *msg)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s: channel=%-10s - mode=%-5s (%s)",
 		   __FUNCTION__,
@@ -308,7 +308,7 @@
 trace_http_reply(struct stream *s, struct filter *filter, short status,
 		 const struct chunk *msg)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 
 	STRM_TRACE(conf, s, "%-25s: channel=%-10s - mode=%-5s (%s)",
 		   __FUNCTION__, "-", proxy_mode(s), stream_pos(s));
@@ -318,7 +318,7 @@
 trace_http_forward_data(struct stream *s, struct filter *filter,
 			struct http_msg *msg, unsigned int len)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 	int                  ret  = len;
 
 	if (ret && conf->rand_forwarding)
@@ -342,7 +342,7 @@
 static int
 trace_tcp_data(struct stream *s, struct filter *filter, struct channel *chn)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 	int                  avail = chn->buf->i - FLT_NXT(filter, chn);
 	int                  ret  = avail;
 
@@ -363,7 +363,7 @@
 trace_tcp_forward_data(struct stream *s, struct filter *filter, struct channel *chn,
 		 unsigned int len)
 {
-	struct trace_config *conf = filter->conf;
+	struct trace_config *conf = FLT_CONF(filter);
 	int                  ret  = len;
 
 	if (ret && conf->rand_forwarding)
@@ -414,7 +414,7 @@
 /* Return -1 on error, else 0 */
 static int
 parse_trace_flt(char **args, int *cur_arg, struct proxy *px,
-		struct filter *filter, char **err)
+		struct flt_conf *fconf, char **err)
 {
 	struct trace_config *conf;
 	int                  pos = *cur_arg;
@@ -452,10 +452,10 @@
 			pos++;
 		}
 		*cur_arg = pos;
-		filter->ops  = &trace_ops;
+		fconf->ops  = &trace_ops;
 	}
 
-	filter->conf = conf;
+	fconf->conf = conf;
 	return 0;
 
  error:
diff --git a/src/proxy.c b/src/proxy.c
index 1c92e91..5fb5b93 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -748,7 +748,7 @@
 	LIST_INIT(&p->conf.listeners);
 	LIST_INIT(&p->conf.args.list);
 	LIST_INIT(&p->tcpcheck_rules);
-	LIST_INIT(&p->filters);
+	LIST_INIT(&p->filter_configs);
 
 	/* Timeouts are defined as -1 */
 	proxy_reset_timeouts(p);