* [RFC PATCH 32/39] blktrace: add trace event print helper
@ 2019-11-20 4:25 Chaitanya Kulkarni
0 siblings, 0 replies; 2+ messages in thread
From: Chaitanya Kulkarni @ 2019-11-20 4:25 UTC (permalink / raw
To: linux-btrace
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
kernel/trace/blktrace.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 5e5a05581f63..747fd8caf10f 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -2196,12 +2196,51 @@ static enum print_line_t print_one_line(struct trace_iterator *iter,
return trace_handle_return(s);
}
+static enum print_line_t print_one_line_ext(struct trace_iterator *iter,
+ bool classic)
+{
+ struct trace_array *tr = iter->tr;
+ struct trace_seq *s = &iter->seq;
+ const struct blk_io_trace_ext *t;
+ u32 what;
+ bool long_act;
+ blk_log_action_t *log_action;
+ bool has_cg;
+
+ t = te_blk_io_trace_ext(iter->ent);
+ what = (t->action & ((1ULL << BLK_TC_SHIFT_EXT) - 1)) & ~__BLK_TA_CGROUP;
+ long_act = !!(tr->trace_flags & TRACE_ITER_VERBOSE);
+ log_action = classic ? &blk_log_action_classic_ext : &blk_log_action_ext;
+ has_cg = t->action & __BLK_TA_CGROUP;
+
+ if ((t->action & ~__BLK_TN_CGROUP) = BLK_TN_MESSAGE_EXT) {
+ log_action(iter, long_act ? "message" : "m", has_cg);
+ blk_log_msg_ext(s, iter->ent, has_cg);
+ return trace_handle_return(s);
+ }
+
+ if (unlikely(what = 0 || what >= ARRAY_SIZE(what2act_ext)))
+ trace_seq_printf(s, "Unknown action %x\n", what);
+ else {
+ log_action(iter, what2act_ext[what].act[long_act], has_cg);
+ what2act_ext[what].print(s, iter->ent, has_cg);
+ }
+
+ return trace_handle_return(s);
+}
+
static enum print_line_t blk_trace_event_print(struct trace_iterator *iter,
int flags, struct trace_event *event)
{
return print_one_line(iter, false);
}
+static enum print_line_t blk_trace_event_print_ext(struct trace_iterator *iter,
+ int flags, struct trace_event *event)
+{
+ return print_one_line_ext(iter, false);
+}
+
static void blk_trace_synthesize_old_trace(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
--
2.22.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [RFC PATCH 32/39] blktrace: add trace event print helper
@ 2020-03-23 16:30 Chaitanya Kulkarni
0 siblings, 0 replies; 2+ messages in thread
From: Chaitanya Kulkarni @ 2020-03-23 16:30 UTC (permalink / raw
To: linux-btrace
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
kernel/trace/blktrace.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 05894c23f781..92d7a6e46f86 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -2410,12 +2410,51 @@ static enum print_line_t print_one_line(struct trace_iterator *iter,
return trace_handle_return(s);
}
+static enum print_line_t print_one_line_ext(struct trace_iterator *iter,
+ bool classic)
+{
+ struct trace_array *tr = iter->tr;
+ struct trace_seq *s = &iter->seq;
+ const struct blk_io_trace_ext *t;
+ u32 what;
+ bool long_act;
+ blk_log_action_t *log_action;
+ bool has_cg;
+
+ t = te_blk_io_trace_ext(iter->ent);
+ what = (t->action & ((1ULL << BLK_TC_SHIFT_EXT) - 1)) & ~__BLK_TA_CGROUP;
+ long_act = !!(tr->trace_flags & TRACE_ITER_VERBOSE);
+ log_action = classic ? &blk_log_action_classic_ext : &blk_log_action_ext;
+ has_cg = t->action & __BLK_TA_CGROUP;
+
+ if ((t->action & ~__BLK_TN_CGROUP) = BLK_TN_MESSAGE_EXT) {
+ log_action(iter, long_act ? "message" : "m", has_cg);
+ blk_log_msg_ext(s, iter->ent, has_cg);
+ return trace_handle_return(s);
+ }
+
+ if (unlikely(what = 0 || what >= ARRAY_SIZE(what2act_ext)))
+ trace_seq_printf(s, "Unknown action %x\n", what);
+ else {
+ log_action(iter, what2act_ext[what].act[long_act], has_cg);
+ what2act_ext[what].print(s, iter->ent, has_cg);
+ }
+
+ return trace_handle_return(s);
+}
+
static enum print_line_t blk_trace_event_print(struct trace_iterator *iter,
int flags, struct trace_event *event)
{
return print_one_line(iter, false);
}
+static enum print_line_t blk_trace_event_print_ext(struct trace_iterator *iter,
+ int flags, struct trace_event *event)
+{
+ return print_one_line_ext(iter, false);
+}
+
static void blk_trace_synthesize_old_trace(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
--
2.22.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
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2019-11-20 4:25 Chaitanya Kulkarni
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