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Filter: Allow silent filter execution

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A filter should log messages only if executed explicitly (e.g., during
route export or route import). When a filter is executed for technical
reasons (e.g., to establish whether a route was exported before), it
should run silently.
This commit is contained in:
Ondrej Zajicek (work) 2018-01-16 16:20:01 +01:00
parent 0ff86d054e
commit b940579115
4 changed files with 14 additions and 7 deletions
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9
filter/filter.c
View File

@ -590,7 +590,8 @@ f_rta_cow(void)
static struct tbf rl_runtime_err = TBF_DEFAULT_LOG_LIMITS;
#define runtime(x) do { \
log_rl(&rl_runtime_err, L_ERR "filters, line %d: %s", what->lineno, x); \
if (!(f_flags & FF_SILENT)) \
log_rl(&rl_runtime_err, L_ERR "filters, line %d: %s", what->lineno, x); \
res.type = T_RETURN; \
res.val.i = F_ERROR; \
return res; \
@ -889,7 +890,8 @@ interpret(struct f_inst *what)
break;
case P('p',','):
ONEARG;
if (what->a2.i == F_NOP || (what->a2.i != F_NONL && what->a1.p))
if ((what->a2.i == F_NOP || (what->a2.i != F_NONL && what->a1.p)) &&
!(f_flags & FF_SILENT))
log_commit(*L_INFO, &f_buf);
switch (what->a2.i) {
@ -1723,7 +1725,8 @@ f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struc
if (res.type != T_RETURN) {
log_rl(&rl_runtime_err, L_ERR "Filter %s did not return accept nor reject. Make up your mind", filter->name);
if (!(f_flags & FF_SILENT))
log_rl(&rl_runtime_err, L_ERR "Filter %s did not return accept nor reject. Make up your mind", filter->name);
return F_ERROR;
}
DBG( "done (%u)\n", res.val.i );

1
filter/filter.h
View File

@ -227,5 +227,6 @@ struct f_trie
#define NEW_F_VAL struct f_val * val; val = cfg_alloc(sizeof(struct f_val));
#define FF_FORCE_TMPATTR 1 /* Force all attributes to be temporary */
#define FF_SILENT 2 /* Silent filter execution */
#endif

9
nest/rt-table.c
View File

@ -273,7 +273,8 @@ export_filter_(struct announce_hook *ah, rte *rt0, rte **rt_free, ea_list **tmpa
}
v = filter && ((filter == FILTER_REJECT) ||
(f_run(filter, &rt, tmpa, pool, FF_FORCE_TMPATTR) > F_ACCEPT));
(f_run(filter, &rt, tmpa, pool,
FF_FORCE_TMPATTR | (silent ? FF_SILENT : 0)) > F_ACCEPT));
if (v)
{
if (silent)
@ -1298,7 +1299,8 @@ rt_examine(rtable *t, ip_addr prefix, int pxlen, struct proto *p, struct filter
ea_list *tmpa = rte_make_tmp_attrs(rt, rte_update_pool);
int v = p->import_control ? p->import_control(p, &rt, &tmpa, rte_update_pool) : 0;
if (v == RIC_PROCESS)
v = (f_run(filter, &rt, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) <= F_ACCEPT);
v = (f_run(filter, &rt, &tmpa, rte_update_pool,
FF_FORCE_TMPATTR | FF_SILENT) <= F_ACCEPT);
/* Discard temporary rte */
if (rt != n->routes)
@ -2493,7 +2495,8 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
* command may change the export filter and do not update routes.
*/
int do_export = (ic > 0) ||
(f_run(a->out_filter, &e, &tmpa, rte_update_pool, FF_FORCE_TMPATTR) <= F_ACCEPT);
(f_run(a->out_filter, &e, &tmpa, rte_update_pool,
FF_FORCE_TMPATTR | FF_SILENT) <= F_ACCEPT);
if (do_export != (d->export_mode == RSEM_EXPORT))
goto skip;

2
sysdep/unix/krt.c
View File

@ -632,7 +632,7 @@ krt_export_net(struct krt_proto *p, net *net, rte **rt_free, ea_list **tmpa)
if (filter == FILTER_ACCEPT)
goto accept;
if (f_run(filter, &rt, tmpa, krt_filter_lp, FF_FORCE_TMPATTR) > F_ACCEPT)
if (f_run(filter, &rt, tmpa, krt_filter_lp, FF_FORCE_TMPATTR | FF_SILENT) > F_ACCEPT)
goto reject;