summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--block/blktrace.c2
-rw-r--r--kernel/trace/trace.c75
-rw-r--r--kernel/trace/trace_branch.c2
-rw-r--r--kernel/trace/trace_output.c123
4 files changed, 87 insertions, 115 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index 8f5c37b..12df276 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -1165,7 +1165,7 @@ static int blk_trace_event_print(struct trace_iterator *iter, int flags)
const u16 what = t->action & ((1 << BLK_TC_SHIFT) - 1);
int ret;
- if (trace_print_context(iter))
+ if (!trace_print_context(iter))
return TRACE_TYPE_PARTIAL_LINE;
if (unlikely(what == 0 || what > ARRAY_SIZE(what2act)))
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bbdfaa2..5822ff4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1402,27 +1402,25 @@ static enum print_line_t print_lat_fmt(struct trace_iterator *iter)
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
struct trace_event *event;
struct trace_entry *entry = iter->ent;
- int ret;
test_cpu_buff_start(iter);
event = ftrace_find_event(entry->type);
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- ret = trace_print_lat_context(iter);
- if (ret)
- return ret;
+ if (!trace_print_lat_context(iter))
+ goto partial;
}
- if (event && event->latency_trace) {
- ret = event->latency_trace(iter, sym_flags);
- if (ret)
- return ret;
- return TRACE_TYPE_HANDLED;
- }
+ if (event && event->latency_trace)
+ return event->latency_trace(iter, sym_flags);
+
+ if (!trace_seq_printf(s, "Unknown type %d\n", entry->type))
+ goto partial;
- trace_seq_printf(s, "Unknown type %d\n", entry->type);
return TRACE_TYPE_HANDLED;
+partial:
+ return TRACE_TYPE_PARTIAL_LINE;
}
static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
@@ -1431,7 +1429,6 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
struct trace_entry *entry;
struct trace_event *event;
- int ret;
entry = iter->ent;
@@ -1440,22 +1437,19 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
event = ftrace_find_event(entry->type);
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- ret = trace_print_context(iter);
- if (ret)
- return ret;
+ if (!trace_print_context(iter))
+ goto partial;
}
- if (event && event->trace) {
- ret = event->trace(iter, sym_flags);
- if (ret)
- return ret;
- return TRACE_TYPE_HANDLED;
- }
- ret = trace_seq_printf(s, "Unknown type %d\n", entry->type);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ if (event && event->trace)
+ return event->trace(iter, sym_flags);
+
+ if (!trace_seq_printf(s, "Unknown type %d\n", entry->type))
+ goto partial;
return TRACE_TYPE_HANDLED;
+partial:
+ return TRACE_TYPE_PARTIAL_LINE;
}
static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
@@ -1463,29 +1457,25 @@ static enum print_line_t print_raw_fmt(struct trace_iterator *iter)
struct trace_seq *s = &iter->seq;
struct trace_entry *entry;
struct trace_event *event;
- int ret;
entry = iter->ent;
if (trace_flags & TRACE_ITER_CONTEXT_INFO) {
- ret = trace_seq_printf(s, "%d %d %llu ",
- entry->pid, iter->cpu, iter->ts);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ if (!trace_seq_printf(s, "%d %d %llu ",
+ entry->pid, iter->cpu, iter->ts))
+ goto partial;
}
event = ftrace_find_event(entry->type);
- if (event && event->raw) {
- ret = event->raw(iter, 0);
- if (ret)
- return ret;
- return TRACE_TYPE_HANDLED;
- }
- ret = trace_seq_printf(s, "%d ?\n", entry->type);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
+ if (event && event->raw)
+ return event->raw(iter, 0);
+
+ if (!trace_seq_printf(s, "%d ?\n", entry->type))
+ goto partial;
return TRACE_TYPE_HANDLED;
+partial:
+ return TRACE_TYPE_PARTIAL_LINE;
}
static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
@@ -1504,8 +1494,11 @@ static enum print_line_t print_hex_fmt(struct trace_iterator *iter)
}
event = ftrace_find_event(entry->type);
- if (event && event->hex)
- event->hex(iter, 0);
+ if (event && event->hex) {
+ int ret = event->hex(iter, 0);
+ if (ret != TRACE_TYPE_HANDLED)
+ return ret;
+ }
SEQ_PUT_FIELD_RET(s, newline);
@@ -1544,7 +1537,7 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
event = ftrace_find_event(entry->type);
if (event && event->binary)
- event->binary(iter, 0);
+ return event->binary(iter, 0);
return TRACE_TYPE_HANDLED;
}
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index ea62f10..f6b35e1 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -173,7 +173,7 @@ static int trace_branch_print(struct trace_iterator *iter, int flags)
field->line))
return TRACE_TYPE_PARTIAL_LINE;
- return 0;
+ return TRACE_TYPE_HANDLED;
}
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index c24503b..5b3c914 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -286,55 +286,41 @@ seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
return ret;
}
-static void
+static int
lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
{
int hardirq, softirq;
char *comm;
comm = trace_find_cmdline(entry->pid);
-
- trace_seq_printf(s, "%8.8s-%-5d ", comm, entry->pid);
- trace_seq_printf(s, "%3d", cpu);
- trace_seq_printf(s, "%c%c",
- (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
- (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : '.',
- ((entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
-
hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
- if (hardirq && softirq) {
- trace_seq_putc(s, 'H');
- } else {
- if (hardirq) {
- trace_seq_putc(s, 'h');
- } else {
- if (softirq)
- trace_seq_putc(s, 's');
- else
- trace_seq_putc(s, '.');
- }
- }
+
+ if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c",
+ comm, entry->pid, cpu,
+ (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
+ (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
+ 'X' : '.',
+ (entry->flags & TRACE_FLAG_NEED_RESCHED) ?
+ 'N' : '.',
+ (hardirq && softirq) ? 'H' :
+ hardirq ? 'h' : softirq ? 's' : '.'))
+ return 0;
if (entry->preempt_count)
- trace_seq_printf(s, "%x", entry->preempt_count);
- else
- trace_seq_puts(s, ".");
+ return trace_seq_printf(s, "%x", entry->preempt_count);
+ return trace_seq_puts(s, ".");
}
static unsigned long preempt_mark_thresh = 100;
-static void
+static int
lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
unsigned long rel_usecs)
{
- trace_seq_printf(s, " %4lldus", abs_usecs);
- if (rel_usecs > preempt_mark_thresh)
- trace_seq_puts(s, "!: ");
- else if (rel_usecs > 1)
- trace_seq_puts(s, "+: ");
- else
- trace_seq_puts(s, " : ");
+ return trace_seq_printf(s, " %4lldus%c: ", abs_usecs,
+ rel_usecs > preempt_mark_thresh ? '!' :
+ rel_usecs > 1 ? '+' : ' ');
}
int trace_print_context(struct trace_iterator *iter)
@@ -346,22 +332,14 @@ int trace_print_context(struct trace_iterator *iter)
unsigned long usec_rem = do_div(t, USEC_PER_SEC);
unsigned long secs = (unsigned long)t;
- if (!trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid))
- goto partial;
- if (!trace_seq_printf(s, "[%03d] ", entry->cpu))
- goto partial;
- if (!trace_seq_printf(s, "%5lu.%06lu: ", secs, usec_rem))
- goto partial;
-
- return 0;
-
-partial:
- return TRACE_TYPE_PARTIAL_LINE;
+ return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ",
+ comm, entry->pid, entry->cpu, secs, usec_rem);
}
int trace_print_lat_context(struct trace_iterator *iter)
{
u64 next_ts;
+ int ret;
struct trace_seq *s = &iter->seq;
struct trace_entry *entry = iter->ent,
*next_entry = trace_find_next_entry(iter, NULL,
@@ -376,21 +354,22 @@ int trace_print_lat_context(struct trace_iterator *iter)
if (verbose) {
char *comm = trace_find_cmdline(entry->pid);
- trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08lx]"
- " %ld.%03ldms (+%ld.%03ldms): ",
- comm,
- entry->pid, entry->cpu, entry->flags,
- entry->preempt_count, iter->idx,
- ns2usecs(iter->ts),
- abs_usecs/1000,
- abs_usecs % 1000, rel_usecs/1000,
- rel_usecs % 1000);
+ ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08lx]"
+ " %ld.%03ldms (+%ld.%03ldms): ", comm,
+ entry->pid, entry->cpu, entry->flags,
+ entry->preempt_count, iter->idx,
+ ns2usecs(iter->ts),
+ abs_usecs / USEC_PER_MSEC,
+ abs_usecs % USEC_PER_MSEC,
+ rel_usecs / USEC_PER_MSEC,
+ rel_usecs % USEC_PER_MSEC);
} else {
- lat_print_generic(s, entry, entry->cpu);
- lat_print_timestamp(s, abs_usecs, rel_usecs);
+ ret = lat_print_generic(s, entry, entry->cpu);
+ if (ret)
+ ret = lat_print_timestamp(s, abs_usecs, rel_usecs);
}
- return 0;
+ return ret;
}
static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
@@ -486,7 +465,7 @@ int unregister_ftrace_event(struct trace_event *event)
int trace_nop_print(struct trace_iterator *iter, int flags)
{
- return 0;
+ return TRACE_TYPE_HANDLED;
}
/* TRACE_FN */
@@ -506,7 +485,7 @@ static int trace_fn_latency(struct trace_iterator *iter, int flags)
if (!trace_seq_puts(s, ")\n"))
goto partial;
- return 0;
+ return TRACE_TYPE_HANDLED;
partial:
return TRACE_TYPE_PARTIAL_LINE;
@@ -533,7 +512,7 @@ static int trace_fn_trace(struct trace_iterator *iter, int flags)
if (!trace_seq_printf(s, "\n"))
goto partial;
- return 0;
+ return TRACE_TYPE_HANDLED;
partial:
return TRACE_TYPE_PARTIAL_LINE;
@@ -550,7 +529,7 @@ static int trace_fn_raw(struct trace_iterator *iter, int flags)
field->parent_ip))
return TRACE_TYPE_PARTIAL_LINE;
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_fn_hex(struct trace_iterator *iter, int flags)
@@ -563,7 +542,7 @@ static int trace_fn_hex(struct trace_iterator *iter, int flags)
SEQ_PUT_HEX_FIELD_RET(s, field->ip);
SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_fn_bin(struct trace_iterator *iter, int flags)
@@ -576,7 +555,7 @@ static int trace_fn_bin(struct trace_iterator *iter, int flags)
SEQ_PUT_FIELD_RET(s, field->ip);
SEQ_PUT_FIELD_RET(s, field->parent_ip);
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static struct trace_event trace_fn_event = {
@@ -611,7 +590,7 @@ static int trace_ctxwake_print(struct trace_iterator *iter, char *delim)
T, comm))
return TRACE_TYPE_PARTIAL_LINE;
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_ctx_print(struct trace_iterator *iter, int flags)
@@ -644,7 +623,7 @@ static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
T))
return TRACE_TYPE_PARTIAL_LINE;
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_ctx_raw(struct trace_iterator *iter, int flags)
@@ -678,7 +657,7 @@ static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
SEQ_PUT_HEX_FIELD_RET(s, T);
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_ctx_hex(struct trace_iterator *iter, int flags)
@@ -705,7 +684,7 @@ static int trace_ctxwake_bin(struct trace_iterator *iter, int flags)
SEQ_PUT_FIELD_RET(s, field->next_prio);
SEQ_PUT_FIELD_RET(s, field->next_state);
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static struct trace_event trace_ctx_event = {
@@ -739,7 +718,7 @@ static int trace_special_print(struct trace_iterator *iter, int flags)
field->arg3))
return TRACE_TYPE_PARTIAL_LINE;
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_special_hex(struct trace_iterator *iter, int flags)
@@ -753,7 +732,7 @@ static int trace_special_hex(struct trace_iterator *iter, int flags)
SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static int trace_special_bin(struct trace_iterator *iter, int flags)
@@ -767,7 +746,7 @@ static int trace_special_bin(struct trace_iterator *iter, int flags)
SEQ_PUT_FIELD_RET(s, field->arg2);
SEQ_PUT_FIELD_RET(s, field->arg3);
- return 0;
+ return TRACE_TYPE_HANDLED;
}
static struct trace_event trace_special_event = {
@@ -801,7 +780,7 @@ static int trace_stack_print(struct trace_iterator *iter, int flags)
goto partial;
}
- return 0;
+ return TRACE_TYPE_HANDLED;
partial:
return TRACE_TYPE_PARTIAL_LINE;
@@ -830,7 +809,7 @@ static int trace_user_stack_print(struct trace_iterator *iter, int flags)
if (!trace_seq_putc(s, '\n'))
goto partial;
- return 0;
+ return TRACE_TYPE_HANDLED;
partial:
return TRACE_TYPE_PARTIAL_LINE;
@@ -859,7 +838,7 @@ static int trace_print_print(struct trace_iterator *iter, int flags)
if (!trace_seq_printf(s, ": %s", field->buf))
goto partial;
- return 0;
+ return TRACE_TYPE_HANDLED;
partial:
return TRACE_TYPE_PARTIAL_LINE;
@@ -874,7 +853,7 @@ static int trace_print_raw(struct trace_iterator *iter, int flags)
if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
goto partial;
- return 0;
+ return TRACE_TYPE_HANDLED;
partial:
return TRACE_TYPE_PARTIAL_LINE;
OpenPOWER on IntegriCloud