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-rw-r--r--kernel/trace/Kconfig8
-rw-r--r--kernel/trace/blktrace.c4
-rw-r--r--kernel/trace/bpf_trace.c12
-rw-r--r--kernel/trace/ftrace.c23
-rw-r--r--kernel/trace/rv/rv.c2
-rw-r--r--kernel/trace/trace.c8
-rw-r--r--kernel/trace/trace.h2
-rw-r--r--kernel/trace/trace_events.c39
-rw-r--r--kernel/trace/trace_events_filter.c8
-rw-r--r--kernel/trace/trace_events_hist.c2
-rw-r--r--kernel/trace/trace_export.c3
-rw-r--r--kernel/trace/trace_osnoise.c5
-rw-r--r--kernel/trace/trace_output.c3
-rw-r--r--kernel/trace/trace_preemptirq.c61
14 files changed, 104 insertions, 76 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 5df427a2321d..caf32389faf3 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -940,8 +940,8 @@ config RING_BUFFER_RECORD_RECURSION
default y
help
The ring buffer has its own internal recursion. Although when
- recursion happens it wont cause harm because of the protection,
- but it does cause an unwanted overhead. Enabling this option will
+ recursion happens it won't cause harm because of the protection,
+ but it does cause unwanted overhead. Enabling this option will
place where recursion was detected into the ftrace "recursed_functions"
file.
@@ -1024,8 +1024,8 @@ config RING_BUFFER_STARTUP_TEST
The test runs for 10 seconds. This will slow your boot time
by at least 10 more seconds.
- At the end of the test, statics and more checks are done.
- It will output the stats of each per cpu buffer. What
+ At the end of the test, statistics and more checks are done.
+ It will output the stats of each per cpu buffer: What
was written, the sizes, what was read, what was lost, and
other similar details.
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 918a7d12df8f..5743be559415 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -320,8 +320,8 @@ static void blk_trace_free(struct request_queue *q, struct blk_trace *bt)
* under 'q->debugfs_dir', thus lookup and remove them.
*/
if (!bt->dir) {
- debugfs_remove(debugfs_lookup("dropped", q->debugfs_dir));
- debugfs_remove(debugfs_lookup("msg", q->debugfs_dir));
+ debugfs_lookup_and_remove("dropped", q->debugfs_dir);
+ debugfs_lookup_and_remove("msg", q->debugfs_dir);
} else {
debugfs_remove(bt->dir);
}
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 3bbd3f0c810c..b8ac8b09c86f 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -687,8 +687,7 @@ BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, regs, struct bpf_map *, map,
}
perf_sample_data_init(sd, 0, 0);
- sd->raw = &raw;
- sd->sample_flags |= PERF_SAMPLE_RAW;
+ perf_sample_save_raw_data(sd, &raw);
err = __bpf_perf_event_output(regs, map, flags, sd);
@@ -746,8 +745,7 @@ u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
perf_fetch_caller_regs(regs);
perf_sample_data_init(sd, 0, 0);
- sd->raw = &raw;
- sd->sample_flags |= PERF_SAMPLE_RAW;
+ perf_sample_save_raw_data(sd, &raw);
ret = __bpf_perf_event_output(regs, map, flags, sd);
out:
@@ -833,6 +831,7 @@ static void do_bpf_send_signal(struct irq_work *entry)
work = container_of(entry, struct send_signal_irq_work, irq_work);
group_send_sig_info(work->sig, SEND_SIG_PRIV, work->task, work->type);
+ put_task_struct(work->task);
}
static int bpf_send_signal_common(u32 sig, enum pid_type type)
@@ -848,6 +847,9 @@ static int bpf_send_signal_common(u32 sig, enum pid_type type)
return -EPERM;
if (unlikely(!nmi_uaccess_okay()))
return -EPERM;
+ /* Task should not be pid=1 to avoid kernel panic. */
+ if (unlikely(is_global_init(current)))
+ return -EPERM;
if (irqs_disabled()) {
/* Do an early check on signal validity. Otherwise,
@@ -864,7 +866,7 @@ static int bpf_send_signal_common(u32 sig, enum pid_type type)
* to the irq_work. The current task may change when queued
* irq works get executed.
*/
- work->task = current;
+ work->task = get_task_struct(current);
work->sig = sig;
work->type = type;
irq_work_queue(&work->irq_work);
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e634b80f49d1..51896b610414 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1275,12 +1275,17 @@ static void free_ftrace_hash_rcu(struct ftrace_hash *hash)
call_rcu(&hash->rcu, __free_ftrace_hash_rcu);
}
+/**
+ * ftrace_free_filter - remove all filters for an ftrace_ops
+ * @ops - the ops to remove the filters from
+ */
void ftrace_free_filter(struct ftrace_ops *ops)
{
ftrace_ops_init(ops);
free_ftrace_hash(ops->func_hash->filter_hash);
free_ftrace_hash(ops->func_hash->notrace_hash);
}
+EXPORT_SYMBOL_GPL(ftrace_free_filter);
static struct ftrace_hash *alloc_ftrace_hash(int size_bits)
{
@@ -5938,6 +5943,10 @@ EXPORT_SYMBOL_GPL(modify_ftrace_direct_multi);
*
* Filters denote which functions should be enabled when tracing is enabled
* If @ip is NULL, it fails to update filter.
+ *
+ * This can allocate memory which must be freed before @ops can be freed,
+ * either by removing each filtered addr or by using
+ * ftrace_free_filter(@ops).
*/
int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip,
int remove, int reset)
@@ -5957,7 +5966,11 @@ EXPORT_SYMBOL_GPL(ftrace_set_filter_ip);
*
* Filters denote which functions should be enabled when tracing is enabled
* If @ips array or any ip specified within is NULL , it fails to update filter.
- */
+ *
+ * This can allocate memory which must be freed before @ops can be freed,
+ * either by removing each filtered addr or by using
+ * ftrace_free_filter(@ops).
+*/
int ftrace_set_filter_ips(struct ftrace_ops *ops, unsigned long *ips,
unsigned int cnt, int remove, int reset)
{
@@ -5999,6 +6012,10 @@ ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len,
*
* Filters denote which functions should be enabled when tracing is enabled.
* If @buf is NULL and reset is set, all functions will be enabled for tracing.
+ *
+ * This can allocate memory which must be freed before @ops can be freed,
+ * either by removing each filtered addr or by using
+ * ftrace_free_filter(@ops).
*/
int ftrace_set_filter(struct ftrace_ops *ops, unsigned char *buf,
int len, int reset)
@@ -6018,6 +6035,10 @@ EXPORT_SYMBOL_GPL(ftrace_set_filter);
* Notrace Filters denote which functions should not be enabled when tracing
* is enabled. If @buf is NULL and reset is set, all functions will be enabled
* for tracing.
+ *
+ * This can allocate memory which must be freed before @ops can be freed,
+ * either by removing each filtered addr or by using
+ * ftrace_free_filter(@ops).
*/
int ftrace_set_notrace(struct ftrace_ops *ops, unsigned char *buf,
int len, int reset)
diff --git a/kernel/trace/rv/rv.c b/kernel/trace/rv/rv.c
index 6c97cc2d754a..7e9061828c24 100644
--- a/kernel/trace/rv/rv.c
+++ b/kernel/trace/rv/rv.c
@@ -516,7 +516,7 @@ static ssize_t enabled_monitors_write(struct file *filp, const char __user *user
struct rv_monitor_def *mdef;
int retval = -EINVAL;
bool enable = true;
- char *ptr = buff;
+ char *ptr;
int len;
if (count < 1 || count > MAX_RV_MONITOR_NAME_SIZE + 1)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a555a861b978..54a163ae4815 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3128,6 +3128,9 @@ void __trace_stack(struct trace_array *tr, unsigned int trace_ctx,
return;
}
+ if (WARN_ON_ONCE(IS_ENABLED(CONFIG_GENERIC_ENTRY)))
+ return;
+
/*
* When an NMI triggers, RCU is enabled via ct_nmi_enter(),
* but if the above rcu_is_watching() failed, then the NMI
@@ -9148,9 +9151,6 @@ buffer_percent_write(struct file *filp, const char __user *ubuf,
if (val > 100)
return -EINVAL;
- if (!val)
- val = 1;
-
tr->buffer_percent = val;
(*ppos)++;
@@ -10295,6 +10295,8 @@ void __init early_trace_init(void)
static_key_enable(&tracepoint_printk_key.key);
}
tracer_alloc_buffers();
+
+ init_events();
}
void __init trace_init(void)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index e46a49269be2..085a31b978a5 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1282,6 +1282,7 @@ struct ftrace_event_field {
int offset;
int size;
int is_signed;
+ int len;
};
struct prog_entry;
@@ -1490,6 +1491,7 @@ extern void trace_event_enable_cmd_record(bool enable);
extern void trace_event_enable_tgid_record(bool enable);
extern int event_trace_init(void);
+extern int init_events(void);
extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr);
extern int event_trace_del_tracer(struct trace_array *tr);
extern void __trace_early_add_events(struct trace_array *tr);
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 33e0b4f8ebe6..6a942fa275c7 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -114,7 +114,7 @@ trace_find_event_field(struct trace_event_call *call, char *name)
static int __trace_define_field(struct list_head *head, const char *type,
const char *name, int offset, int size,
- int is_signed, int filter_type)
+ int is_signed, int filter_type, int len)
{
struct ftrace_event_field *field;
@@ -133,6 +133,7 @@ static int __trace_define_field(struct list_head *head, const char *type,
field->offset = offset;
field->size = size;
field->is_signed = is_signed;
+ field->len = len;
list_add(&field->link, head);
@@ -150,14 +151,28 @@ int trace_define_field(struct trace_event_call *call, const char *type,
head = trace_get_fields(call);
return __trace_define_field(head, type, name, offset, size,
- is_signed, filter_type);
+ is_signed, filter_type, 0);
}
EXPORT_SYMBOL_GPL(trace_define_field);
+static int trace_define_field_ext(struct trace_event_call *call, const char *type,
+ const char *name, int offset, int size, int is_signed,
+ int filter_type, int len)
+{
+ struct list_head *head;
+
+ if (WARN_ON(!call->class))
+ return 0;
+
+ head = trace_get_fields(call);
+ return __trace_define_field(head, type, name, offset, size,
+ is_signed, filter_type, len);
+}
+
#define __generic_field(type, item, filter_type) \
ret = __trace_define_field(&ftrace_generic_fields, #type, \
#item, 0, 0, is_signed_type(type), \
- filter_type); \
+ filter_type, 0); \
if (ret) \
return ret;
@@ -166,7 +181,7 @@ EXPORT_SYMBOL_GPL(trace_define_field);
"common_" #item, \
offsetof(typeof(ent), item), \
sizeof(ent.item), \
- is_signed_type(type), FILTER_OTHER); \
+ is_signed_type(type), FILTER_OTHER, 0); \
if (ret) \
return ret;
@@ -1588,12 +1603,17 @@ static int f_show(struct seq_file *m, void *v)
seq_printf(m, "\tfield:%s %s;\toffset:%u;\tsize:%u;\tsigned:%d;\n",
field->type, field->name, field->offset,
field->size, !!field->is_signed);
- else
- seq_printf(m, "\tfield:%.*s %s%s;\toffset:%u;\tsize:%u;\tsigned:%d;\n",
+ else if (field->len)
+ seq_printf(m, "\tfield:%.*s %s[%d];\toffset:%u;\tsize:%u;\tsigned:%d;\n",
(int)(array_descriptor - field->type),
field->type, field->name,
- array_descriptor, field->offset,
+ field->len, field->offset,
field->size, !!field->is_signed);
+ else
+ seq_printf(m, "\tfield:%.*s %s[];\toffset:%u;\tsize:%u;\tsigned:%d;\n",
+ (int)(array_descriptor - field->type),
+ field->type, field->name,
+ field->offset, field->size, !!field->is_signed);
return 0;
}
@@ -2379,9 +2399,10 @@ event_define_fields(struct trace_event_call *call)
}
offset = ALIGN(offset, field->align);
- ret = trace_define_field(call, field->type, field->name,
+ ret = trace_define_field_ext(call, field->type, field->name,
offset, field->size,
- field->is_signed, field->filter_type);
+ field->is_signed, field->filter_type,
+ field->len);
if (WARN_ON_ONCE(ret)) {
pr_err("error code is %d\n", ret);
break;
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 96acc2b71ac7..e095c3b3a50d 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -128,7 +128,7 @@ static bool is_not(const char *str)
}
/**
- * prog_entry - a singe entry in the filter program
+ * struct prog_entry - a singe entry in the filter program
* @target: Index to jump to on a branch (actually one minus the index)
* @when_to_branch: The value of the result of the predicate to do a branch
* @pred: The predicate to execute.
@@ -140,16 +140,16 @@ struct prog_entry {
};
/**
- * update_preds- assign a program entry a label target
+ * update_preds - assign a program entry a label target
* @prog: The program array
* @N: The index of the current entry in @prog
- * @when_to_branch: What to assign a program entry for its branch condition
+ * @invert: What to assign a program entry for its branch condition
*
* The program entry at @N has a target that points to the index of a program
* entry that can have its target and when_to_branch fields updated.
* Update the current program entry denoted by index @N target field to be
* that of the updated entry. This will denote the entry to update if
- * we are processing an "||" after an "&&"
+ * we are processing an "||" after an "&&".
*/
static void update_preds(struct prog_entry *prog, int N, int invert)
{
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index fcaf226b7744..5edbf6b1da3f 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1988,6 +1988,8 @@ static struct hist_field *create_hist_field(struct hist_trigger_data *hist_data,
hist_field->fn_num = flags & HIST_FIELD_FL_LOG2 ? HIST_FIELD_FN_LOG2 :
HIST_FIELD_FN_BUCKET;
hist_field->operands[0] = create_hist_field(hist_data, field, fl, NULL);
+ if (!hist_field->operands[0])
+ goto free;
hist_field->size = hist_field->operands[0]->size;
hist_field->type = kstrdup_const(hist_field->operands[0]->type, GFP_KERNEL);
if (!hist_field->type)
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index d960f6b11b5e..58f3946081e2 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -111,7 +111,8 @@ static void __always_unused ____ftrace_check_##name(void) \
#define __array(_type, _item, _len) { \
.type = #_type"["__stringify(_len)"]", .name = #_item, \
.size = sizeof(_type[_len]), .align = __alignof__(_type), \
- is_signed_type(_type), .filter_type = FILTER_OTHER },
+ is_signed_type(_type), .filter_type = FILTER_OTHER, \
+ .len = _len },
#undef __array_desc
#define __array_desc(_type, _container, _item, _len) __array(_type, _item, _len)
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 94c1b5eb1dc0..210e1f168392 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -147,9 +147,8 @@ static void osnoise_unregister_instance(struct trace_array *tr)
* register/unregister serialization is provided by trace's
* trace_types_lock.
*/
- lockdep_assert_held(&trace_types_lock);
-
- list_for_each_entry_rcu(inst, &osnoise_instances, list) {
+ list_for_each_entry_rcu(inst, &osnoise_instances, list,
+ lockdep_is_held(&trace_types_lock)) {
if (inst->tr == tr) {
list_del_rcu(&inst->list);
found = 1;
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 57a13b61f186..bd475a00f96d 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -1535,7 +1535,7 @@ static struct trace_event *events[] __initdata = {
NULL
};
-__init static int init_events(void)
+__init int init_events(void)
{
struct trace_event *event;
int i, ret;
@@ -1548,4 +1548,3 @@ __init static int init_events(void)
return 0;
}
-early_initcall(init_events);
diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index 1e130da1b742..e37446f7916e 100644
--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -15,6 +15,20 @@
#define CREATE_TRACE_POINTS
#include <trace/events/preemptirq.h>
+/*
+ * Use regular trace points on architectures that implement noinstr
+ * tooling: these calls will only happen with RCU enabled, which can
+ * use a regular tracepoint.
+ *
+ * On older architectures, use the rcuidle tracing methods (which
+ * aren't NMI-safe - so exclude NMI contexts):
+ */
+#ifdef CONFIG_ARCH_WANTS_NO_INSTR
+#define trace(point) trace_##point
+#else
+#define trace(point) if (!in_nmi()) trace_##point##_rcuidle
+#endif
+
#ifdef CONFIG_TRACE_IRQFLAGS
/* Per-cpu variable to prevent redundant calls when IRQs already off */
static DEFINE_PER_CPU(int, tracing_irq_cpu);
@@ -28,8 +42,7 @@ static DEFINE_PER_CPU(int, tracing_irq_cpu);
void trace_hardirqs_on_prepare(void)
{
if (this_cpu_read(tracing_irq_cpu)) {
- if (!in_nmi())
- trace_irq_enable(CALLER_ADDR0, CALLER_ADDR1);
+ trace(irq_enable)(CALLER_ADDR0, CALLER_ADDR1);
tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1);
this_cpu_write(tracing_irq_cpu, 0);
}
@@ -40,8 +53,7 @@ NOKPROBE_SYMBOL(trace_hardirqs_on_prepare);
void trace_hardirqs_on(void)
{
if (this_cpu_read(tracing_irq_cpu)) {
- if (!in_nmi())
- trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
+ trace(irq_enable)(CALLER_ADDR0, CALLER_ADDR1);
tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1);
this_cpu_write(tracing_irq_cpu, 0);
}
@@ -63,8 +75,7 @@ void trace_hardirqs_off_finish(void)
if (!this_cpu_read(tracing_irq_cpu)) {
this_cpu_write(tracing_irq_cpu, 1);
tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
- if (!in_nmi())
- trace_irq_disable(CALLER_ADDR0, CALLER_ADDR1);
+ trace(irq_disable)(CALLER_ADDR0, CALLER_ADDR1);
}
}
@@ -78,56 +89,24 @@ void trace_hardirqs_off(void)
if (!this_cpu_read(tracing_irq_cpu)) {
this_cpu_write(tracing_irq_cpu, 1);
tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
- if (!in_nmi())
- trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
+ trace(irq_disable)(CALLER_ADDR0, CALLER_ADDR1);
}
}
EXPORT_SYMBOL(trace_hardirqs_off);
NOKPROBE_SYMBOL(trace_hardirqs_off);
-
-__visible void trace_hardirqs_on_caller(unsigned long caller_addr)
-{
- if (this_cpu_read(tracing_irq_cpu)) {
- if (!in_nmi())
- trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
- tracer_hardirqs_on(CALLER_ADDR0, caller_addr);
- this_cpu_write(tracing_irq_cpu, 0);
- }
-
- lockdep_hardirqs_on_prepare();
- lockdep_hardirqs_on(caller_addr);
-}
-EXPORT_SYMBOL(trace_hardirqs_on_caller);
-NOKPROBE_SYMBOL(trace_hardirqs_on_caller);
-
-__visible void trace_hardirqs_off_caller(unsigned long caller_addr)
-{
- lockdep_hardirqs_off(caller_addr);
-
- if (!this_cpu_read(tracing_irq_cpu)) {
- this_cpu_write(tracing_irq_cpu, 1);
- tracer_hardirqs_off(CALLER_ADDR0, caller_addr);
- if (!in_nmi())
- trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
- }
-}
-EXPORT_SYMBOL(trace_hardirqs_off_caller);
-NOKPROBE_SYMBOL(trace_hardirqs_off_caller);
#endif /* CONFIG_TRACE_IRQFLAGS */
#ifdef CONFIG_TRACE_PREEMPT_TOGGLE
void trace_preempt_on(unsigned long a0, unsigned long a1)
{
- if (!in_nmi())
- trace_preempt_enable_rcuidle(a0, a1);
+ trace(preempt_enable)(a0, a1);
tracer_preempt_on(a0, a1);
}
void trace_preempt_off(unsigned long a0, unsigned long a1)
{
- if (!in_nmi())
- trace_preempt_disable_rcuidle(a0, a1);
+ trace(preempt_disable)(a0, a1);
tracer_preempt_off(a0, a1);
}
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-10 00:28:45 +0000