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MEDIUM: proxy: only take defaults when a default proxy is passed. 

The proxy initialization code relies on three phases, allocation,
pre-initialization, and assignments from defaults. This last part is
entirely taken from the defaults proxy when arguments are set. This
sensibly complexifies the initialization code as it requires to always
have a default proxy.

This patch instead first applies the original default settings on a
proxy, and then uses those from a default proxy only if one such is
used. This will allow to initialize a proxy out of any default proxy
while still using valid defaults. A careful inspection of the function
showed that only 4 fields used to be set regardless of the default
proxy, and those were moved to init_new_proxy() where they ought to
have been in the first place.
This commit is contained in:
Willy Tarreau 2021-02-12 09:15:16 +01:00
parent 7683893c70
commit 3b06eaec86
1 changed files with 15 additions and 6 deletions
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21
src/proxy.c
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@ -1037,6 +1037,11 @@ void init_new_proxy(struct proxy *p)
LIST_INIT(&p->filter_configs);
LIST_INIT(&p->tcpcheck_rules.preset_vars);
p->defsrv.id = "default-server";
p->conf.used_listener_id = EB_ROOT;
p->conf.used_server_id = EB_ROOT;
p->used_server_addr = EB_ROOT_UNIQUE;
/* Timeouts are defined as -1 */
proxy_reset_timeouts(p);
p->tcp_rep.inspect_delay = TICK_ETERNITY;
@ -1097,7 +1102,8 @@ void proxy_preset_defaults(struct proxy *defproxy)
/* Allocates a new proxy <name> of type <cap> found at position <file:linenum>,
* preset it from the defaults of <defproxy> and returns it. Un case of error,
* an alert is printed and NULL is returned. If <errmsg> is not NULL, an error
* message will be returned there in case of fatal error.
* message will be returned there in case of fatal error. If <defproxy> is NULL,
* the documented default settings will be used instead.
*/
struct proxy *alloc_new_proxy(const char *name, unsigned int cap, const char *file, int linenum, const struct proxy *defproxy, char **errmsg)
{
@ -1118,9 +1124,13 @@ struct proxy *alloc_new_proxy(const char *name, unsigned int cap, const char *fi
curproxy->cap = cap;
proxy_store_name(curproxy);
/* set default values */
if (!defproxy) {
proxy_preset_defaults(curproxy);
goto done;
}
/* set default values from the specified default proxy */
memcpy(&curproxy->defsrv, &defproxy->defsrv, sizeof(curproxy->defsrv));
curproxy->defsrv.id = "default-server";
curproxy->disabled = defproxy->disabled;
curproxy->options = defproxy->options;
@ -1334,9 +1344,6 @@ struct proxy *alloc_new_proxy(const char *name, unsigned int cap, const char *fi
}
curproxy->grace = defproxy->grace;
curproxy->conf.used_listener_id = EB_ROOT;
curproxy->conf.used_server_id = EB_ROOT;
curproxy->used_server_addr = EB_ROOT_UNIQUE;
if (defproxy->check_path)
curproxy->check_path = strdup(defproxy->check_path);
@ -1353,6 +1360,8 @@ struct proxy *alloc_new_proxy(const char *name, unsigned int cap, const char *fi
curproxy->email_alert.myhostname = strdup(defproxy->email_alert.myhostname);
curproxy->email_alert.level = defproxy->email_alert.level;
curproxy->email_alert.set = defproxy->email_alert.set;
done:
return curproxy;
fail:
/* Note: in case of fatal error here, we WILL make valgrind unhappy,