diff options
| -rw-r--r-- | kernel/trace/trace.h | 1 | ||||
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 124 |
2 files changed, 45 insertions, 80 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index acef8b4636f..628614532d1 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -683,7 +683,6 @@ struct event_filter { int n_preds; struct filter_pred **preds; char *filter_string; - bool no_reset; }; struct event_subsystem { diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 92672016da2..9c4f9a0dae2 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -615,14 +615,7 @@ static int init_subsystem_preds(struct event_subsystem *system) return 0; } -enum { - FILTER_DISABLE_ALL, - FILTER_INIT_NO_RESET, - FILTER_SKIP_NO_RESET, -}; - -static void filter_free_subsystem_preds(struct event_subsystem *system, - int flag) +static void filter_free_subsystem_preds(struct event_subsystem *system) { struct ftrace_event_call *call; @@ -633,14 +626,6 @@ static void filter_free_subsystem_preds(struct event_subsystem *system, if (strcmp(call->system, system->name) != 0) continue; - if (flag == FILTER_INIT_NO_RESET) { - call->filter->no_reset = false; - continue; - } - - if (flag == FILTER_SKIP_NO_RESET && call->filter->no_reset) - continue; - filter_disable_preds(call); remove_filter_string(call->filter); } @@ -817,44 +802,6 @@ add_pred_fn: return 0; } -static int filter_add_subsystem_pred(struct filter_parse_state *ps, - struct event_subsystem *system, - struct filter_pred *pred, - char *filter_string, - bool dry_run) -{ - struct ftrace_event_call *call; - int err = 0; - bool fail = true; - - list_for_each_entry(call, &ftrace_events, list) { - - if (!call->define_fields) - continue; - - if (strcmp(call->system, system->name)) - continue; - - if (call->filter->no_reset) - continue; - - err = filter_add_pred(ps, call, pred, dry_run); - if (err) - call->filter->no_reset = true; - else - fail = false; - - if (!dry_run) - replace_filter_string(call->filter, filter_string); - } - - if (fail) { - parse_error(ps, FILT_ERR_BAD_SUBSYS_FILTER, 0); - return err; - } - return 0; -} - static void parse_init(struct filter_parse_state *ps, struct filter_op *ops, char *infix_string) @@ -1209,8 +1156,7 @@ static int check_preds(struct filter_parse_state *ps) return 0; } -static int replace_preds(struct event_subsystem *system, - struct ftrace_event_call *call, +static int replace_preds(struct ftrace_event_call *call, struct filter_parse_state *ps, char *filter_string, bool dry_run) @@ -1257,11 +1203,7 @@ static int replace_preds(struct event_subsystem *system, add_pred: if (!pred) return -ENOMEM; - if (call) - err = filter_add_pred(ps, call, pred, false); - else - err = filter_add_subsystem_pred(ps, system, pred, - filter_string, dry_run); + err = filter_add_pred(ps, call, pred, dry_run); filter_free_pred(pred); if (err) return err; @@ -1272,6 +1214,44 @@ add_pred: return 0; } +static int replace_system_preds(struct event_subsystem *system, + struct filter_parse_state *ps, + char *filter_string) +{ + struct ftrace_event_call *call; + int err; + bool fail = true; + + list_for_each_entry(call, &ftrace_events, list) { + + if (!call->define_fields) + continue; + + if (strcmp(call->system, system->name) != 0) + continue; + + /* try to see if the filter can be applied */ + err = replace_preds(call, ps, filter_string, true); + if (err) + continue; + + /* really apply the filter */ + filter_disable_preds(call); + err = replace_preds(call, ps, filter_string, false); + if (err) + filter_disable_preds(call); + else + replace_filter_string(call->filter, filter_string); + fail = false; + } + + if (fail) { + parse_error(ps, FILT_ERR_BAD_SUBSYS_FILTER, 0); + return err; + } + return 0; +} + int apply_event_filter(struct ftrace_event_call *call, char *filter_string) { int err; @@ -1306,7 +1286,7 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string) goto out; } - err = replace_preds(NULL, call, ps, filter_string, false); + err = replace_preds(call, ps, filter_string, false); if (err) append_filter_err(ps, call->filter); @@ -1334,7 +1314,7 @@ int apply_subsystem_event_filter(struct event_subsystem *system, goto out_unlock; if (!strcmp(strstrip(filter_string), "0")) { - filter_free_subsystem_preds(system, FILTER_DISABLE_ALL); + filter_free_subsystem_preds(system); remove_filter_string(system->filter); mutex_unlock(&event_mutex); return 0; @@ -1354,23 +1334,9 @@ int apply_subsystem_event_filter(struct event_subsystem *system, goto out; } - filter_free_subsystem_preds(system, FILTER_INIT_NO_RESET); - - /* try to see the filter can be applied to which events */ - err = replace_preds(system, NULL, ps, filter_string, true); - if (err) { - append_filter_err(ps, system->filter); - goto out; - } - - filter_free_subsystem_preds(system, FILTER_SKIP_NO_RESET); - - /* really apply the filter to the events */ - err = replace_preds(system, NULL, ps, filter_string, false); - if (err) { + err = replace_system_preds(system, ps, filter_string); + if (err) append_filter_err(ps, system->filter); - filter_free_subsystem_preds(system, 2); - } out: filter_opstack_clear(ps); |