From 4bda2d517bfa3ce3d7044e06988cdddae7adffe2 Mon Sep 17 00:00:00 2001 From: Tom Zanussi Date: Tue, 24 Mar 2009 02:14:31 -0500 Subject: tracing/filters: use trace_seq_printf() to print filters Impact: cleanup Instead of just using the trace_seq buffer to print the filters, use trace_seq_printf() as it was intended to be used. Reported-by: Steven Rostedt Signed-off-by: Tom Zanussi Cc: =?ISO-8859-1?Q?Fr=E9d=E9ric?= Weisbecker LKML-Reference: <1237878871.8339.59.camel@charm-linux> Signed-off-by: Ingo Molnar --- kernel/trace/trace.h | 3 ++- kernel/trace/trace_events.c | 8 ++++---- kernel/trace/trace_events_filter.c | 25 +++++++++---------------- 3 files changed, 15 insertions(+), 21 deletions(-) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 54fd9bc..90a848d 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -840,7 +840,8 @@ struct filter_pred { int trace_define_field(struct ftrace_event_call *call, char *type, char *name, int offset, int size); extern void filter_free_pred(struct filter_pred *pred); -extern int filter_print_preds(struct filter_pred **preds, char *buf); +extern void filter_print_preds(struct filter_pred **preds, + struct trace_seq *s); extern int filter_parse(char **pbuf, struct filter_pred *pred); extern int filter_add_pred(struct ftrace_event_call *call, struct filter_pred *pred); diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index a938138..d132997 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -481,8 +481,8 @@ event_filter_read(struct file *filp, char __user *ubuf, size_t cnt, trace_seq_init(s); - r = filter_print_preds(call->preds, s->buffer); - r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, r); + filter_print_preds(call->preds, s); + r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len); kfree(s); @@ -547,8 +547,8 @@ subsystem_filter_read(struct file *filp, char __user *ubuf, size_t cnt, trace_seq_init(s); - r = filter_print_preds(system->preds, s->buffer); - r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, r); + filter_print_preds(system->preds, s); + r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len); kfree(s); diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 3f0b79f..9fca8bb 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -24,6 +24,7 @@ #include #include "trace.h" +#include "trace_output.h" static int filter_pred_64(struct filter_pred *pred, void *event) { @@ -108,16 +109,15 @@ int filter_match_preds(struct ftrace_event_call *call, void *rec) return 1; } -int filter_print_preds(struct filter_pred **preds, char *buf) +void filter_print_preds(struct filter_pred **preds, struct trace_seq *s) { - ssize_t this_len = 0; char *field_name; struct filter_pred *pred; int i; if (!preds) { - this_len += sprintf(buf + this_len, "none\n"); - return this_len; + trace_seq_printf(s, "none\n"); + return; } for (i = 0; i < MAX_FILTER_PRED; i++) { @@ -125,23 +125,16 @@ int filter_print_preds(struct filter_pred **preds, char *buf) pred = preds[i]; field_name = pred->field_name; if (i) - this_len += sprintf(buf + this_len, - pred->or ? "|| " : "&& "); - this_len += sprintf(buf + this_len, - "%s ", field_name); - this_len += sprintf(buf + this_len, - pred->not ? "!= " : "== "); + trace_seq_printf(s, pred->or ? "|| " : "&& "); + trace_seq_printf(s, "%s ", field_name); + trace_seq_printf(s, pred->not ? "!= " : "== "); if (pred->str_val) - this_len += sprintf(buf + this_len, - "%s\n", pred->str_val); + trace_seq_printf(s, "%s\n", pred->str_val); else - this_len += sprintf(buf + this_len, - "%llu\n", pred->val); + trace_seq_printf(s, "%llu\n", pred->val); } else break; } - - return this_len; } static struct ftrace_event_field * -- cgit v1.1