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haproxy/addons/ot/src/conf.c
Miroslav Zagorac ca09e01a13 DEBUG: opentracing: show return values of all functions in the debug output 
If the OpenTracing filter is compiled using the 'OT_DEBUG=1' option, then
log messages are printed to stderr when the filter is running.  In the log
one can then find (among other things) the order in which the function is
called and the value that the function returns (if it is not a void type).

Prior to applying this patch, no value returned by a function was logged.

Log output example:
  [ 1]    0.038807 [OT]: flt_ot_init_per_thread(0x56365bd45ec0, 0x56365bd48210) {
  [ 1]    0.038807 [OT]:    ot_start(0x56365bd58920, 0x56365bd4e3a0, 0x7f561acba168:(nil)) {
  [ 1]    0.038807 [OT]:    } = 0
  [ 1]    0.038807 [OT]: } = 0

This patch must be backported as far as 2.4.
2022-04-08 16:31:33 +02:00

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/***
* Copyright 2020 HAProxy Technologies
*
* This file is part of the HAProxy OpenTracing filter.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "include.h"
/***
* NAME
* flt_ot_conf_hdr_init -
*
* ARGUMENTS
* size -
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
static void *flt_ot_conf_hdr_init(size_t size, const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_hdr *retptr = NULL, *ptr;
FLT_OT_FUNC("%zu, \"%s\", %d, %p, %p:%p", size, id, linenum, head, FLT_OT_DPTR_ARGS(err));
if (head != NULL)
list_for_each_entry(ptr, head, list)
if (strcmp(ptr->id, id) == 0) {
FLT_OT_ERR("'%s' : already defined", id);
FLT_OT_RETURN_PTR(retptr);
}
retptr = FLT_OT_CALLOC(1, size);
if (retptr != NULL) {
retptr->id_len = strlen(id);
if (retptr->id_len >= FLT_OT_ID_MAXLEN)
FLT_OT_ERR("'%s' : name too long", id);
else
retptr->id = FLT_OT_STRDUP(id);
if (retptr->id == NULL)
FLT_OT_FREE_CLEAR(retptr);
}
if (retptr != NULL) {
retptr->cfg_line = linenum;
if (head != NULL)
LIST_APPEND(head, &(retptr->list));
} else {
FLT_OT_ERR("out of memory");
}
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_ph_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_ph *flt_ot_conf_ph_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_ph *retptr;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr != NULL)
FLT_OT_DBG_CONF_PH("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_ph_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_ph_free(struct flt_ot_conf_ph **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_PH("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_sample_expr_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_sample_expr *flt_ot_conf_sample_expr_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_sample_expr *retptr;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr != NULL)
FLT_OT_DBG_CONF_SAMPLE_EXPR("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_sample_expr_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_sample_expr_free(struct flt_ot_conf_sample_expr **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_SAMPLE_EXPR("- free ", *ptr);
FLT_OT_FREE((*ptr)->value);
release_sample_expr((*ptr)->expr);
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_sample_init -
*
* ARGUMENTS
* args -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_sample *flt_ot_conf_sample_init(char **args, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_sample *retptr;
FLT_OT_FUNC("%p, %d, %p, %p:%p", args, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), args[1], linenum, head, err);
if (retptr == NULL)
FLT_OT_RETURN_PTR(retptr);
flt_ot_args_to_str(args, 2, &(retptr->value));
if (retptr->value == NULL) {
FLT_OT_FREE_CLEAR(retptr);
FLT_OT_RETURN_PTR(retptr);
}
retptr->num_exprs = flt_ot_args_count(args) - 2;
LIST_INIT(&(retptr->exprs));
FLT_OT_DBG_CONF_SAMPLE("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_sample_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_sample_free(struct flt_ot_conf_sample **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_SAMPLE("- free ", *ptr);
FLT_OT_FREE((*ptr)->key);
FLT_OT_FREE((*ptr)->value);
FLT_OT_LIST_DESTROY(sample_expr, &((*ptr)->exprs));
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_str_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_str *flt_ot_conf_str_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_str *retptr;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr != NULL)
FLT_OT_DBG_CONF_STR("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_str_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_str_free(struct flt_ot_conf_str **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_STR("- free ", *ptr);
FLT_OT_FREE((*ptr)->str);
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_context_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_context *flt_ot_conf_context_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_context *retptr;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr != NULL)
FLT_OT_DBG_CONF_CONTEXT("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_context_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_context_free(struct flt_ot_conf_context **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_CONTEXT("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_span_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_span *flt_ot_conf_span_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_span *retptr;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr == NULL)
FLT_OT_RETURN_PTR(retptr);
LIST_INIT(&(retptr->tags));
LIST_INIT(&(retptr->logs));
LIST_INIT(&(retptr->baggages));
FLT_OT_DBG_CONF_SPAN("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_span_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_span_free(struct flt_ot_conf_span **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_SPAN("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
FLT_OT_FREE((*ptr)->ref_id);
FLT_OT_FREE((*ptr)->ctx_id);
FLT_OT_LIST_DESTROY(sample, &((*ptr)->tags));
FLT_OT_LIST_DESTROY(sample, &((*ptr)->logs));
FLT_OT_LIST_DESTROY(sample, &((*ptr)->baggages));
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_scope_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_scope *flt_ot_conf_scope_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_scope *retptr = NULL;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr == NULL)
FLT_OT_RETURN_PTR(retptr);
LIST_INIT(&(retptr->acls));
LIST_INIT(&(retptr->contexts));
LIST_INIT(&(retptr->spans));
LIST_INIT(&(retptr->finish));
FLT_OT_DBG_CONF_SCOPE("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_scope_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_scope_free(struct flt_ot_conf_scope **ptr)
{
struct acl *acl, *aclback;
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_SCOPE("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
list_for_each_entry_safe(acl, aclback, &((*ptr)->acls), list) {
prune_acl(acl);
FLT_OT_LIST_DEL(&(acl->list));
FLT_OT_FREE(acl);
}
if ((*ptr)->cond != NULL) {
prune_acl_cond((*ptr)->cond);
FLT_OT_FREE((*ptr)->cond);
}
FLT_OT_LIST_DESTROY(context, &((*ptr)->contexts));
FLT_OT_LIST_DESTROY(span, &((*ptr)->spans));
FLT_OT_LIST_DESTROY(str, &((*ptr)->finish));
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_group_init -
*
* ARGUMENTS
* id -
* linenum -
* head -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_group *flt_ot_conf_group_init(const char *id, int linenum, struct list *head, char **err)
{
struct flt_ot_conf_group *retptr;
FLT_OT_FUNC("\"%s\", %d, %p, %p:%p", id, linenum, head, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, head, err);
if (retptr == NULL)
FLT_OT_RETURN_PTR(retptr);
LIST_INIT(&(retptr->ph_scopes));
FLT_OT_DBG_CONF_GROUP("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_group_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_group_free(struct flt_ot_conf_group **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_GROUP("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
FLT_OT_LIST_DESTROY(ph_scope, &((*ptr)->ph_scopes));
FLT_OT_LIST_DEL(&((*ptr)->list));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_tracer_init -
*
* ARGUMENTS
* id -
* linenum -
* err -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf_tracer *flt_ot_conf_tracer_init(const char *id, int linenum, char **err)
{
struct flt_ot_conf_tracer *retptr;
FLT_OT_FUNC("\"%s\", %d, %p:%p", id, linenum, FLT_OT_DPTR_ARGS(err));
retptr = flt_ot_conf_hdr_init(sizeof(*retptr), id, linenum, NULL, err);
if (retptr == NULL)
FLT_OT_RETURN_PTR(retptr);
retptr->rate_limit = FLT_OT_FLOAT_U32(FLT_OT_RATE_LIMIT_MAX, FLT_OT_RATE_LIMIT_MAX);
init_new_proxy(&(retptr->proxy_log));
LIST_INIT(&(retptr->acls));
LIST_INIT(&(retptr->ph_groups));
LIST_INIT(&(retptr->ph_scopes));
FLT_OT_DBG_CONF_TRACER("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_tracer_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_tracer_free(struct flt_ot_conf_tracer **ptr)
{
struct acl *acl, *aclback;
struct logsrv *logsrv, *logsrvback;
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF_TRACER("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
FLT_OT_FREE((*ptr)->config);
FLT_OT_FREE((*ptr)->cfgbuf);
FLT_OT_FREE((*ptr)->plugin);
FLT_OT_DBG(2, "- deleting acls list %s", flt_ot_list_debug(&((*ptr)->acls)));
list_for_each_entry_safe(acl, aclback, &((*ptr)->acls), list) {
prune_acl(acl);
FLT_OT_LIST_DEL(&(acl->list));
FLT_OT_FREE(acl);
}
FLT_OT_DBG(2, "- deleting proxy_log.logsrvs list %s", flt_ot_list_debug(&((*ptr)->proxy_log.logsrvs)));
list_for_each_entry_safe(logsrv, logsrvback, &((*ptr)->proxy_log.logsrvs), list) {
LIST_DELETE(&(logsrv->list));
FLT_OT_FREE(logsrv);
}
FLT_OT_LIST_DESTROY(ph_group, &((*ptr)->ph_groups));
FLT_OT_LIST_DESTROY(ph_scope, &((*ptr)->ph_scopes));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/***
* NAME
* flt_ot_conf_init -
*
* ARGUMENTS
* px -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* -
*/
struct flt_ot_conf *flt_ot_conf_init(struct proxy *px)
{
struct flt_ot_conf *retptr;
FLT_OT_FUNC("%p", px);
retptr = FLT_OT_CALLOC(1, sizeof(*retptr));
if (retptr == NULL)
FLT_OT_RETURN_PTR(retptr);
retptr->proxy = px;
LIST_INIT(&(retptr->groups));
LIST_INIT(&(retptr->scopes));
FLT_OT_DBG_CONF("- init ", retptr);
FLT_OT_RETURN_PTR(retptr);
}
/***
* NAME
* flt_ot_conf_free -
*
* ARGUMENTS
* ptr -
*
* DESCRIPTION
* -
*
* RETURN VALUE
* This function does not return a value.
*/
void flt_ot_conf_free(struct flt_ot_conf **ptr)
{
FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
if ((ptr == NULL) || (*ptr == NULL))
FLT_OT_RETURN();
FLT_OT_DBG_CONF("- free ", *ptr);
FLT_OT_FREE((*ptr)->id);
FLT_OT_FREE((*ptr)->cfg_file);
flt_ot_conf_tracer_free(&((*ptr)->tracer));
FLT_OT_LIST_DESTROY(group, &((*ptr)->groups));
FLT_OT_LIST_DESTROY(scope, &((*ptr)->scopes));
FLT_OT_FREE_CLEAR(*ptr);
FLT_OT_RETURN();
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*
* vi: noexpandtab shiftwidth=8 tabstop=8
*/
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