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[MEDIUM] acl: when possible, report the name and requirements of ACLs in warnings 

When an ACL is referenced at a wrong place (eg: response during request, layer7
during layer4), try to indicate precisely the name and requirements of this ACL.

Only the first faulty ACL is returned. A small change consisting in iterating
that way may improve reports :
   cap = ACL_USE_any_unexpected
   while ((acl=cond_find_require(cond, cap))) {
     warning()
     cap &= ~acl->requires;
   }

This will report the first ACL of each unsupported type. But doing so will
mangle the error reporting a lot, so we need to rework error reports first.
This commit is contained in:
Willy Tarreau 2008-07-27 22:02:32 +02:00
parent 0ceba5af74
commit dd64f8d394
4 changed files with 54 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/proto/acl.h
View File

@ -87,6 +87,11 @@ struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl, int p
*/
int acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *l4, void *l7, int dir);
/* Reports a pointer to the first ACL used in condition <cond> which requires
* at least one of the USE_FLAGS in <require>. Returns NULL if none matches.
*/
struct acl *cond_find_require(struct acl_cond *cond, unsigned int require);
/* Return a pointer to the ACL <name> within the list starting at <head>, or
* NULL if not found.
*/

24
src/acl.c
View File

@ -1096,6 +1096,30 @@ int acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *l4, v
}
/* Reports a pointer to the first ACL used in condition <cond> which requires
* at least one of the USE_FLAGS in <require>. Returns NULL if none matches.
* The construct is almost the same as for acl_exec_cond() since we're walking
* down the ACL tree as well. It is important that the tree is really walked
* through and never cached, because that way, this function can be used as a
* late check.
*/
struct acl *cond_find_require(struct acl_cond *cond, unsigned int require)
{
struct acl_term_suite *suite;
struct acl_term *term;
struct acl *acl;
list_for_each_entry(suite, &cond->suites, list) {
list_for_each_entry(term, &suite->terms, list) {
acl = term->acl;
if (acl->requires & require)
return acl;
}
}
return NULL;
}
/************************************************************************/
/* All supported keywords must be declared here. */
/************************************************************************/

9
src/cfgparse.c
View File

@ -1244,8 +1244,13 @@ int cfg_parse_listen(const char *file, int linenum, char **args, int inv)
cond->line = linenum;
if (cond->requires & ACL_USE_RTR_ANY) {
Warning("parsing [%s:%d] : switching rule involves some response-only criteria which will be ignored.\n",
file, linenum);
struct acl *acl;
const char *name;
acl = cond_find_require(cond, ACL_USE_RTR_ANY);
name = acl ? acl->name : "(unknown)";
Warning("parsing [%s:%d] : acl '%s' involves some response-only criteria which will be ignored.\n",
file, linenum, name);
}
rule = (struct switching_rule *)calloc(1, sizeof(*rule));

20
src/proto_tcp.c
View File

@ -377,6 +377,7 @@ static int tcp_parse_tcp_req(char **args, int section_type, struct proxy *curpx,
if (!strcmp(args[1], "content")) {
int action;
int warn = 0;
int pol = ACL_COND_NONE;
struct acl_cond *cond;
struct tcp_rule *rule;
@ -410,17 +411,32 @@ static int tcp_parse_tcp_req(char **args, int section_type, struct proxy *curpx,
if (pol != ACL_COND_NONE &&
(cond = parse_acl_cond((const char **)args+4, &curpx->acl, pol)) == NULL) {
retlen = snprintf(err, errlen,
"Error detected in %s '%s' while parsing '%s' condition",
"error detected in %s '%s' while parsing '%s' condition",
proxy_type_str(curpx), curpx->id, args[3]);
return -1;
}
// FIXME: how to set this ?
// cond->line = linenum;
if (cond->requires & (ACL_USE_RTR_ANY | ACL_USE_L7_ANY)) {
struct acl *acl;
const char *name;
acl = cond_find_require(cond, ACL_USE_RTR_ANY|ACL_USE_L7_ANY);
name = acl ? acl->name : "(unknown)";
retlen = snprintf(err, errlen,
"acl '%s' involves some %s criteria which will be ignored.",
name,
(acl->requires & ACL_USE_RTR_ANY) ? "response-only" : "layer 7");
warn++;
}
rule = (struct tcp_rule *)calloc(1, sizeof(*rule));
rule->cond = cond;
rule->action = action;
LIST_INIT(&rule->list);
LIST_ADDQ(&curpx->tcp_req.inspect_rules, &rule->list);
return 0;
return warn;
}
snprintf(err, errlen, "unknown argument '%s' after '%s' in %s '%s'",