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-rw-r--r--kernel/trace/Kconfig7
-rw-r--r--kernel/trace/blktrace.c24
-rw-r--r--kernel/trace/ftrace.c144
-rw-r--r--kernel/trace/ring_buffer.c29
-rw-r--r--kernel/trace/trace.c13
-rw-r--r--kernel/trace/trace.h4
-rw-r--r--kernel/trace/trace_event_perf.c31
-rw-r--r--kernel/trace/trace_events.c194
-rw-r--r--kernel/trace/trace_functions_graph.c219
-rw-r--r--kernel/trace/trace_irqsoff.c152
-rw-r--r--kernel/trace/trace_kdb.c1
-rw-r--r--kernel/trace/trace_kprobe.c43
-rw-r--r--kernel/trace/trace_sched_wakeup.c256
-rw-r--r--kernel/trace/trace_stack.c3
-rw-r--r--kernel/trace/trace_workqueue.c10
15 files changed, 826 insertions, 304 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 538501c6ea5..e04b8bcdef8 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -49,6 +49,11 @@ config HAVE_SYSCALL_TRACEPOINTS
help
See Documentation/trace/ftrace-design.txt
+config HAVE_C_RECORDMCOUNT
+ bool
+ help
+ C version of recordmcount available?
+
config TRACER_MAX_TRACE
bool
@@ -121,7 +126,7 @@ if FTRACE
config FUNCTION_TRACER
bool "Kernel Function Tracer"
depends on HAVE_FUNCTION_TRACER
- select FRAME_POINTER
+ select FRAME_POINTER if (!ARM_UNWIND)
select KALLSYMS
select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 82499a5bdcb..bc251ed6672 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -23,7 +23,6 @@
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
-#include <linux/smp_lock.h>
#include <linux/time.h>
#include <linux/uaccess.h>
@@ -326,6 +325,7 @@ static const struct file_operations blk_dropped_fops = {
.owner = THIS_MODULE,
.open = blk_dropped_open,
.read = blk_dropped_read,
+ .llseek = default_llseek,
};
static int blk_msg_open(struct inode *inode, struct file *filp)
@@ -365,6 +365,7 @@ static const struct file_operations blk_msg_fops = {
.owner = THIS_MODULE,
.open = blk_msg_open,
.write = blk_msg_write,
+ .llseek = noop_llseek,
};
/*
@@ -639,7 +640,6 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
if (!q)
return -ENXIO;
- lock_kernel();
mutex_lock(&bdev->bd_mutex);
switch (cmd) {
@@ -667,7 +667,6 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
}
mutex_unlock(&bdev->bd_mutex);
- unlock_kernel();
return ret;
}
@@ -710,6 +709,9 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq,
if (rq->cmd_flags & REQ_DISCARD)
rw |= REQ_DISCARD;
+ if (rq->cmd_flags & REQ_SECURE)
+ rw |= REQ_SECURE;
+
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
what |= BLK_TC_ACT(BLK_TC_PC);
__blk_add_trace(bt, 0, blk_rq_bytes(rq), rw,
@@ -1649,10 +1651,9 @@ static ssize_t sysfs_blk_trace_attr_show(struct device *dev,
struct block_device *bdev;
ssize_t ret = -ENXIO;
- lock_kernel();
bdev = bdget(part_devt(p));
if (bdev == NULL)
- goto out_unlock_kernel;
+ goto out;
q = blk_trace_get_queue(bdev);
if (q == NULL)
@@ -1680,8 +1681,7 @@ out_unlock_bdev:
mutex_unlock(&bdev->bd_mutex);
out_bdput:
bdput(bdev);
-out_unlock_kernel:
- unlock_kernel();
+out:
return ret;
}
@@ -1711,11 +1711,10 @@ static ssize_t sysfs_blk_trace_attr_store(struct device *dev,
ret = -ENXIO;
- lock_kernel();
p = dev_to_part(dev);
bdev = bdget(part_devt(p));
if (bdev == NULL)
- goto out_unlock_kernel;
+ goto out;
q = blk_trace_get_queue(bdev);
if (q == NULL)
@@ -1750,8 +1749,6 @@ out_unlock_bdev:
mutex_unlock(&bdev->bd_mutex);
out_bdput:
bdput(bdev);
-out_unlock_kernel:
- unlock_kernel();
out:
return ret ? ret : count;
}
@@ -1816,6 +1813,8 @@ void blk_fill_rwbs(char *rwbs, u32 rw, int bytes)
rwbs[i++] = 'S';
if (rw & REQ_META)
rwbs[i++] = 'M';
+ if (rw & REQ_SECURE)
+ rwbs[i++] = 'E';
rwbs[i] = '\0';
}
@@ -1828,6 +1827,9 @@ void blk_fill_rwbs_rq(char *rwbs, struct request *rq)
if (rq->cmd_flags & REQ_DISCARD)
rw |= REQ_DISCARD;
+ if (rq->cmd_flags & REQ_SECURE)
+ rw |= REQ_SECURE;
+
bytes = blk_rq_bytes(rq);
blk_fill_rwbs(rwbs, rw, bytes);
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 0d88ce9b9fb..f3dadae8388 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -381,12 +381,19 @@ static int function_stat_show(struct seq_file *m, void *v)
{
struct ftrace_profile *rec = v;
char str[KSYM_SYMBOL_LEN];
+ int ret = 0;
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
- static DEFINE_MUTEX(mutex);
static struct trace_seq s;
unsigned long long avg;
unsigned long long stddev;
#endif
+ mutex_lock(&ftrace_profile_lock);
+
+ /* we raced with function_profile_reset() */
+ if (unlikely(rec->counter == 0)) {
+ ret = -EBUSY;
+ goto out;
+ }
kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
seq_printf(m, " %-30.30s %10lu", str, rec->counter);
@@ -408,7 +415,6 @@ static int function_stat_show(struct seq_file *m, void *v)
do_div(stddev, (rec->counter - 1) * 1000);
}
- mutex_lock(&mutex);
trace_seq_init(&s);
trace_print_graph_duration(rec->time, &s);
trace_seq_puts(&s, " ");
@@ -416,11 +422,12 @@ static int function_stat_show(struct seq_file *m, void *v)
trace_seq_puts(&s, " ");
trace_print_graph_duration(stddev, &s);
trace_print_seq(m, &s);
- mutex_unlock(&mutex);
#endif
seq_putc(m, '\n');
+out:
+ mutex_unlock(&ftrace_profile_lock);
- return 0;
+ return ret;
}
static void ftrace_profile_reset(struct ftrace_profile_stat *stat)
@@ -793,6 +800,7 @@ static const struct file_operations ftrace_profile_fops = {
.open = tracing_open_generic,
.read = ftrace_profile_read,
.write = ftrace_profile_write,
+ .llseek = default_llseek,
};
/* used to initialize the real stat files */
@@ -877,10 +885,8 @@ enum {
FTRACE_ENABLE_CALLS = (1 << 0),
FTRACE_DISABLE_CALLS = (1 << 1),
FTRACE_UPDATE_TRACE_FUNC = (1 << 2),
- FTRACE_ENABLE_MCOUNT = (1 << 3),
- FTRACE_DISABLE_MCOUNT = (1 << 4),
- FTRACE_START_FUNC_RET = (1 << 5),
- FTRACE_STOP_FUNC_RET = (1 << 6),
+ FTRACE_START_FUNC_RET = (1 << 3),
+ FTRACE_STOP_FUNC_RET = (1 << 4),
};
static int ftrace_filtered;
@@ -1219,8 +1225,6 @@ static void ftrace_shutdown(int command)
static void ftrace_startup_sysctl(void)
{
- int command = FTRACE_ENABLE_MCOUNT;
-
if (unlikely(ftrace_disabled))
return;
@@ -1228,23 +1232,17 @@ static void ftrace_startup_sysctl(void)
saved_ftrace_func = NULL;
/* ftrace_start_up is true if we want ftrace running */
if (ftrace_start_up)
- command |= FTRACE_ENABLE_CALLS;
-
- ftrace_run_update_code(command);
+ ftrace_run_update_code(FTRACE_ENABLE_CALLS);
}
static void ftrace_shutdown_sysctl(void)
{
- int command = FTRACE_DISABLE_MCOUNT;
-
if (unlikely(ftrace_disabled))
return;
/* ftrace_start_up is true if ftrace is running */
if (ftrace_start_up)
- command |= FTRACE_DISABLE_CALLS;
-
- ftrace_run_update_code(command);
+ ftrace_run_update_code(FTRACE_DISABLE_CALLS);
}
static cycle_t ftrace_update_time;
@@ -1361,24 +1359,29 @@ enum {
#define FTRACE_BUFF_MAX (KSYM_SYMBOL_LEN+4) /* room for wildcards */
struct ftrace_iterator {
- struct ftrace_page *pg;
- int hidx;
- int idx;
- unsigned flags;
- struct trace_parser parser;
+ loff_t pos;
+ loff_t func_pos;
+ struct ftrace_page *pg;
+ struct dyn_ftrace *func;
+ struct ftrace_func_probe *probe;
+ struct trace_parser parser;
+ int hidx;
+ int idx;
+ unsigned flags;
};
static void *
-t_hash_next(struct seq_file *m, void *v, loff_t *pos)
+t_hash_next(struct seq_file *m, loff_t *pos)
{
struct ftrace_iterator *iter = m->private;
- struct hlist_node *hnd = v;
+ struct hlist_node *hnd = NULL;
struct hlist_head *hhd;
- WARN_ON(!(iter->flags & FTRACE_ITER_HASH));
-
(*pos)++;
+ iter->pos = *pos;
+ if (iter->probe)
+ hnd = &iter->probe->node;
retry:
if (iter->hidx >= FTRACE_FUNC_HASHSIZE)
return NULL;
@@ -1401,7 +1404,12 @@ t_hash_next(struct seq_file *m, void *v, loff_t *pos)
}
}
- return hnd;
+ if (WARN_ON_ONCE(!hnd))
+ return NULL;
+
+ iter->probe = hlist_entry(hnd, struct ftrace_func_probe, node);
+
+ return iter;
}
static void *t_hash_start(struct seq_file *m, loff_t *pos)
@@ -1410,26 +1418,32 @@ static void *t_hash_start(struct seq_file *m, loff_t *pos)
void *p = NULL;
loff_t l;
- if (!(iter->flags & FTRACE_ITER_HASH))
- *pos = 0;
-
- iter->flags |= FTRACE_ITER_HASH;
+ if (iter->func_pos > *pos)
+ return NULL;
iter->hidx = 0;
- for (l = 0; l <= *pos; ) {
- p = t_hash_next(m, p, &l);
+ for (l = 0; l <= (*pos - iter->func_pos); ) {
+ p = t_hash_next(m, &l);
if (!p)
break;
}
- return p;
+ if (!p)
+ return NULL;
+
+ /* Only set this if we have an item */
+ iter->flags |= FTRACE_ITER_HASH;
+
+ return iter;
}
-static int t_hash_show(struct seq_file *m, void *v)
+static int
+t_hash_show(struct seq_file *m, struct ftrace_iterator *iter)
{
struct ftrace_func_probe *rec;
- struct hlist_node *hnd = v;
- rec = hlist_entry(hnd, struct ftrace_func_probe, node);
+ rec = iter->probe;
+ if (WARN_ON_ONCE(!rec))
+ return -EIO;
if (rec->ops->print)
return rec->ops->print(m, rec->ip, rec->ops, rec->data);
@@ -1450,12 +1464,13 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
struct dyn_ftrace *rec = NULL;
if (iter->flags & FTRACE_ITER_HASH)
- return t_hash_next(m, v, pos);
+ return t_hash_next(m, pos);
(*pos)++;
+ iter->pos = *pos;
if (iter->flags & FTRACE_ITER_PRINTALL)
- return NULL;
+ return t_hash_start(m, pos);
retry:
if (iter->idx >= iter->pg->index) {
@@ -1484,7 +1499,20 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
}
}
- return rec;
+ if (!rec)
+ return t_hash_start(m, pos);
+
+ iter->func_pos = *pos;
+ iter->func = rec;
+
+ return iter;
+}
+
+static void reset_iter_read(struct ftrace_iterator *iter)
+{
+ iter->pos = 0;
+ iter->func_pos = 0;
+ iter->flags &= ~(FTRACE_ITER_PRINTALL & FTRACE_ITER_HASH);
}
static void *t_start(struct seq_file *m, loff_t *pos)
@@ -1495,6 +1523,12 @@ static void *t_start(struct seq_file *m, loff_t *pos)
mutex_lock(&ftrace_lock);
/*
+ * If an lseek was done, then reset and start from beginning.
+ */
+ if (*pos < iter->pos)
+ reset_iter_read(iter);
+
+ /*
* For set_ftrace_filter reading, if we have the filter
* off, we can short cut and just print out that all
* functions are enabled.
@@ -1503,12 +1537,19 @@ static void *t_start(struct seq_file *m, loff_t *pos)
if (*pos > 0)
return t_hash_start(m, pos);
iter->flags |= FTRACE_ITER_PRINTALL;
+ /* reset in case of seek/pread */
+ iter->flags &= ~FTRACE_ITER_HASH;
return iter;
}
if (iter->flags & FTRACE_ITER_HASH)
return t_hash_start(m, pos);
+ /*
+ * Unfortunately, we need to restart at ftrace_pages_start
+ * every time we let go of the ftrace_mutex. This is because
+ * those pointers can change without the lock.
+ */
iter->pg = ftrace_pages_start;
iter->idx = 0;
for (l = 0; l <= *pos; ) {
@@ -1517,10 +1558,14 @@ static void *t_start(struct seq_file *m, loff_t *pos)
break;
}
- if (!p && iter->flags & FTRACE_ITER_FILTER)
- return t_hash_start(m, pos);
+ if (!p) {
+ if (iter->flags & FTRACE_ITER_FILTER)
+ return t_hash_start(m, pos);
- return p;
+ return NULL;
+ }
+
+ return iter;
}
static void t_stop(struct seq_file *m, void *p)
@@ -1531,16 +1576,18 @@ static void t_stop(struct seq_file *m, void *p)
static int t_show(struct seq_file *m, void *v)
{
struct ftrace_iterator *iter = m->private;
- struct dyn_ftrace *rec = v;
+ struct dyn_ftrace *rec;
if (iter->flags & FTRACE_ITER_HASH)
- return t_hash_show(m, v);
+ return t_hash_show(m, iter);
if (iter->flags & FTRACE_ITER_PRINTALL) {
seq_printf(m, "#### all functions enabled ####\n");
return 0;
}
+ rec = iter->func;
+
if (!rec)
return 0;
@@ -1592,8 +1639,8 @@ ftrace_failures_open(struct inode *inode, struct file *file)
ret = ftrace_avail_open(inode, file);
if (!ret) {
- m = (struct seq_file *)file->private_data;
- iter = (struct ftrace_iterator *)m->private;
+ m = file->private_data;
+ iter = m->private;
iter->flags = FTRACE_ITER_FAILURES;
}
@@ -2623,6 +2670,7 @@ static const struct file_operations ftrace_graph_fops = {
.read = seq_read,
.write = ftrace_graph_write,
.release = ftrace_graph_release,
+ .llseek = seq_lseek,
};
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 3632ce87674..c3dab054d18 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -405,7 +405,7 @@ static inline int test_time_stamp(u64 delta)
#define BUF_MAX_DATA_SIZE (BUF_PAGE_SIZE - (sizeof(u32) * 2))
/* Max number of timestamps that can fit on a page */
-#define RB_TIMESTAMPS_PER_PAGE (BUF_PAGE_SIZE / RB_LEN_TIME_STAMP)
+#define RB_TIMESTAMPS_PER_PAGE (BUF_PAGE_SIZE / RB_LEN_TIME_EXTEND)
int ring_buffer_print_page_header(struct trace_seq *s)
{
@@ -2606,6 +2606,19 @@ void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu)
}
EXPORT_SYMBOL_GPL(ring_buffer_record_enable_cpu);
+/*
+ * The total entries in the ring buffer is the running counter
+ * of entries entered into the ring buffer, minus the sum of
+ * the entries read from the ring buffer and the number of
+ * entries that were overwritten.
+ */
+static inline unsigned long
+rb_num_of_entries(struct ring_buffer_per_cpu *cpu_buffer)
+{
+ return local_read(&cpu_buffer->entries) -
+ (local_read(&cpu_buffer->overrun) + cpu_buffer->read);
+}
+
/**
* ring_buffer_entries_cpu - get the number of entries in a cpu buffer
* @buffer: The ring buffer
@@ -2614,16 +2627,13 @@ EXPORT_SYMBOL_GPL(ring_buffer_record_enable_cpu);
unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
- unsigned long ret;
if (!cpumask_test_cpu(cpu, buffer->cpumask))
return 0;
cpu_buffer = buffer->buffers[cpu];
- ret = (local_read(&cpu_buffer->entries) - local_read(&cpu_buffer->overrun))
- - cpu_buffer->read;
- return ret;
+ return rb_num_of_entries(cpu_buffer);
}
EXPORT_SYMBOL_GPL(ring_buffer_entries_cpu);
@@ -2684,8 +2694,7 @@ unsigned long ring_buffer_entries(struct ring_buffer *buffer)
/* if you care about this being correct, lock the buffer */
for_each_buffer_cpu(buffer, cpu) {
cpu_buffer = buffer->buffers[cpu];
- entries += (local_read(&cpu_buffer->entries) -
- local_read(&cpu_buffer->overrun)) - cpu_buffer->read;
+ entries += rb_num_of_entries(cpu_buffer);
}
return entries;
@@ -2985,13 +2994,11 @@ static void rb_advance_reader(struct ring_buffer_per_cpu *cpu_buffer)
static void rb_advance_iter(struct ring_buffer_iter *iter)
{
- struct ring_buffer *buffer;
struct ring_buffer_per_cpu *cpu_buffer;
struct ring_buffer_event *event;
unsigned length;
cpu_buffer = iter->cpu_buffer;
- buffer = cpu_buffer->buffer;
/*
* Check if we are at the end of the buffer.
@@ -3846,6 +3853,9 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
rpos = reader->read;
pos += size;
+ if (rpos >= commit)
+ break;
+
event = rb_reader_event(cpu_buffer);
size = rb_event_length(event);
} while (len > size);
@@ -3964,6 +3974,7 @@ static const struct file_operations rb_simple_fops = {
.open = tracing_open_generic,
.read = rb_simple_read,
.write = rb_simple_write,
+ .llseek = default_llseek,
};
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ba14a22be4c..001bcd2ccf4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2196,7 +2196,7 @@ int tracing_open_generic(struct inode *inode, struct file *filp)
static int tracing_release(struct inode *inode, struct file *file)
{
- struct seq_file *m = (struct seq_file *)file->private_data;
+ struct seq_file *m = file->private_data;
struct trace_iterator *iter;
int cpu;
@@ -3463,6 +3463,7 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *fpos)
{
char *buf;
+ size_t written;
if (tracing_disabled)
return -EINVAL;
@@ -3484,11 +3485,15 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
} else
buf[cnt] = '\0';
- cnt = mark_printk("%s", buf);
+ written = mark_printk("%s", buf);
kfree(buf);
- *fpos += cnt;
+ *fpos += written;
- return cnt;
+ /* don't tell userspace we wrote more - it might confuse them */
+ if (written > cnt)
+ written = cnt;
+
+ return written;
}
static int tracing_clock_show(struct seq_file *m, void *v)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index d39b3c5454a..9021f8c0c0c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -343,6 +343,10 @@ void trace_function(struct trace_array *tr,
unsigned long ip,
unsigned long parent_ip,
unsigned long flags, int pc);
+void trace_graph_function(struct trace_array *tr,
+ unsigned long ip,
+ unsigned long parent_ip,
+ unsigned long flags, int pc);
void trace_default_header(struct seq_file *m);
void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
int trace_empty(struct trace_iterator *iter);
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 000e6e85b44..39c059ca670 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -9,7 +9,7 @@
#include <linux/kprobes.h>
#include "trace.h"
-static char *perf_trace_buf[4];
+static char __percpu *perf_trace_buf[PERF_NR_CONTEXTS];
/*
* Force it to be aligned to unsigned long to avoid misaligned accesses
@@ -24,7 +24,7 @@ static int total_ref_count;
static int perf_trace_event_init(struct ftrace_event_call *tp_event,
struct perf_event *p_event)
{
- struct hlist_head *list;
+ struct hlist_head __percpu *list;
int ret = -ENOMEM;
int cpu;
@@ -42,11 +42,11 @@ static int perf_trace_event_init(struct ftrace_event_call *tp_event,
tp_event->perf_events = list;
if (!total_ref_count) {
- char *buf;
+ char __percpu *buf;
int i;
- for (i = 0; i < 4; i++) {
- buf = (char *)alloc_percpu(perf_trace_t);
+ for (i = 0; i < PERF_NR_CONTEXTS; i++) {
+ buf = (char __percpu *)alloc_percpu(perf_trace_t);
if (!buf)
goto fail;
@@ -65,7 +65,7 @@ fail:
if (!total_ref_count) {
int i;
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < PERF_NR_CONTEXTS; i++) {
free_percpu(perf_trace_buf[i]);
perf_trace_buf[i] = NULL;
}
@@ -91,6 +91,8 @@ int perf_trace_init(struct perf_event *p_event)
tp_event->class && tp_event->class->reg &&
try_module_get(tp_event->mod)) {
ret = perf_trace_event_init(tp_event, p_event);
+ if (ret)
+ module_put(tp_event->mod);
break;
}
}
@@ -99,22 +101,26 @@ int perf_trace_init(struct perf_event *p_event)
return ret;
}
-int perf_trace_enable(struct perf_event *p_event)
+int perf_trace_add(struct perf_event *p_event, int flags)
{
struct ftrace_event_call *tp_event = p_event->tp_event;
+ struct hlist_head __percpu *pcpu_list;
struct hlist_head *list;
- list = tp_event->perf_events;
- if (WARN_ON_ONCE(!list))
+ pcpu_list = tp_event->perf_events;
+ if (WARN_ON_ONCE(!pcpu_list))
return -EINVAL;
- list = this_cpu_ptr(list);
+ if (!(flags & PERF_EF_START))
+ p_event->hw.state = PERF_HES_STOPPED;
+
+ list = this_cpu_ptr(pcpu_list);
hlist_add_head_rcu(&p_event->hlist_entry, list);
return 0;
}
-void perf_trace_disable(struct perf_event *p_event)
+void perf_trace_del(struct perf_event *p_event, int flags)
{
hlist_del_rcu(&p_event->hlist_entry);
}
@@ -140,12 +146,13 @@ void perf_trace_destroy(struct perf_event *p_event)
tp_event->perf_events = NULL;
if (!--total_ref_count) {
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < PERF_NR_CONTEXTS; i++) {
free_percpu(perf_trace_buf[i]);
perf_trace_buf[i] = NULL;
}
}
out:
+ module_put(tp_event->mod);
mutex_unlock(&event_mutex);
}
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 09b4fa6e4d3..0725eeab193 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -598,88 +598,146 @@ out:
return ret;
}
-static void print_event_fields(struct trace_seq *s, struct list_head *head)
+enum {
+ FORMAT_HEADER = 1,
+ FORMAT_FIELD_SEPERATOR = 2,
+ FORMAT_PRINTFMT = 3,
+};
+
+static void *f_next(struct seq_file *m, void *v, loff_t *pos)
{
+ struct ftrace_event_call *call = m->private;
struct ftrace_event_field *field;
+ struct list_head *common_head = &ftrace_common_fields;
+ struct list_head *head = trace_get_fields(call);
- list_for_each_entry_reverse(field, head, link) {
- /*
- * Smartly shows the array type(except dynamic array).
- * Normal:
- * field:TYPE VAR
- * If TYPE := TYPE[LEN], it is shown:
- * field:TYPE VAR[LEN]
- */
- const char *array_descriptor = strchr(field->type, '[');
+ (*pos)++;
- if (!strncmp(field->type, "__data_loc", 10))
- array_descriptor = NULL;
+ switch ((unsigned long)v) {
+ case FORMAT_HEADER:
+ if (unlikely(list_empty(common_head)))
+ return NULL;
- if (!array_descriptor) {
- trace_seq_printf(s, "\tfield:%s %s;\toffset:%u;"
- "\tsize:%u;\tsigned:%d;\n",
- field->type, field->name, field->offset,
- field->size, !!field->is_signed);
- } else {
- trace_seq_printf(s, "\tfield:%.*s %s%s;\toffset:%u;"
- "\tsize:%u;\tsigned:%d;\n",
- (int)(array_descriptor - field->type),
- field->type, field->name,
- array_descriptor, field->offset,
- field->size, !!field->is_signed);
- }
+ field = list_entry(common_head->prev,
+ struct ftrace_event_field, link);
+ return field;
+
+ case FORMAT_FIELD_SEPERATOR:
+ if (unlikely(list_empty(head)))
+ return NULL;
+
+ field = list_entry(head->prev, struct ftrace_event_field, link);
+ return field;
+
+ case FORMAT_PRINTFMT:
+ /* all done */
+ return NULL;
}
+
+ field = v;
+ if (field->link.prev == common_head)
+ return (void *)FORMAT_FIELD_SEPERATOR;
+ else if (field->link.prev == head)
+ return (void *)FORMAT_PRINTFMT;
+
+ field = list_entry(field->link.prev, struct ftrace_event_field, link);
+
+ return field;
}
-static ssize_t
-event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
- loff_t *ppos)
+static void *f_start(struct seq_file *m, loff_t *pos)
{
- struct ftrace_event_call *call = filp->private_data;
- struct list_head *head;
- struct trace_seq *s;
- char *buf;
- int r;
+ loff_t l = 0;
+ void *p;
- if (*ppos)
+ /* Start by showing the header */
+ if (!*pos)
+ return (void *)FORMAT_HEADER;
+
+ p = (void *)FORMAT_HEADER;
+ do {
+ p = f_next(m, p, &l);
+ } while (p && l < *pos);
+
+ return p;
+}
+
+static int f_show(struct seq_file *m, void *v)
+{
+ struct ftrace_event_call *call = m->private;
+ struct ftrace_event_field *field;
+ const char *array_descriptor;
+
+ switch ((unsigned long)v) {
+ case FORMAT_HEADER:
+ seq_printf(m, "name: %s\n", call->name);
+ seq_printf(m, "ID: %d\n", call->event.type);
+ seq_printf(m, "format:\n");
return 0;
- s = kmalloc(sizeof(*s), GFP_KERNEL);
- if (!s)
- return -ENOMEM;
+ case FORMAT_FIELD_SEPERATOR:
+ seq_putc(m, '\n');
+ return 0;
- trace_seq_init(s);
+ case FORMAT_PRINTFMT:
+ seq_printf(m, "\nprint fmt: %s\n",
+ call->print_fmt);
+ return 0;
+ }
- trace_seq_printf(s, "name: %s\n", call->name);
- trace_seq_printf(s, "ID: %d\n", call->event.type);
- trace_seq_printf(s, "format:\n");
+ field = v;
- /* print common fields */
- print_event_fields(s, &ftrace_common_fields);
+ /*
+ * Smartly shows the array type(except dynamic array).
+ * Normal:
+ * field:TYPE VAR
+ * If TYPE := TYPE[LEN], it is shown:
+ * field:TYPE VAR[LEN]
+ */
+ array_descriptor = strchr(field->type, '[');
- trace_seq_putc(s, '\n');
+ if (!strncmp(field->type, "__data_loc", 10))
+ array_descriptor = NULL;
- /* print event specific fields */
- head = trace_get_fields(call);
- print_event_fields(s, head);
+ if (!array_descriptor)
+ 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",
+ (int)(array_descriptor - field->type),
+ field->type, field->name,
+ array_descriptor, field->offset,
+ field->size, !!field->is_signed);
- r = trace_seq_printf(s, "\nprint fmt: %s\n", call->print_fmt);
+ return 0;
+}
- if (!r) {
- /*
- * ug! The format output is bigger than a PAGE!!
- */
- buf = "FORMAT TOO BIG\n";
- r = simple_read_from_buffer(ubuf, cnt, ppos,
- buf, strlen(buf));
- goto out;
- }
+static void f_stop(struct seq_file *m, void *p)
+{
+}
- r = simple_read_from_buffer(ubuf, cnt, ppos,
- s->buffer, s->len);
- out:
- kfree(s);
- return r;
+static const struct seq_operations trace_format_seq_ops = {
+ .start = f_start,
+ .next = f_next,
+ .stop = f_stop,
+ .show = f_show,
+};
+
+static int trace_format_open(struct inode *inode, struct file *file)
+{
+ struct ftrace_event_call *call = inode->i_private;
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &trace_format_seq_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = call;
+
+ return 0;
}
static ssize_t
@@ -874,39 +932,47 @@ static const struct file_operations ftrace_enable_fops = {
.open = tracing_open_generic,
.read = event_enable_read,
.write = event_enable_write,
+ .llseek = default_llseek,
};
static const struct file_operations ftrace_event_format_fops = {
- .open = tracing_open_generic,
- .read = event_format_read,
+ .open = trace_format_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
};
static const struct file_operations ftrace_event_id_fops = {
.open = tracing_open_generic,
.read = event_id_read,
+ .llseek = default_llseek,
};
static const struct file_operations ftrace_event_filter_fops = {
.open = tracing_open_generic,
.read = event_filter_read,
.write = event_filter_write,
+ .llseek = default_llseek,
};
static const struct file_operations ftrace_subsystem_filter_fops = {
.open = tracing_open_generic,
.read = subsystem_filter_read,
.write = subsystem_filter_write,
+ .llseek = default_llseek,
};
static const struct file_operations ftrace_system_enable_fops = {
.open = tracing_open_generic,
.read = system_enable_read,
.write = system_enable_write,
+ .llseek = default_llseek,
};
static const struct file_operations ftrace_show_header_fops = {
.open = tracing_open_generic,
.read = show_header,
+ .llseek = default_llseek,
};
static struct dentry *event_trace_events_dir(void)
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 6bff2362578..76b05980225 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -15,15 +15,19 @@
#include "trace.h"
#include "trace_output.h"
+/* When set, irq functions will be ignored */
+static int ftrace_graph_skip_irqs;
+
struct fgraph_cpu_data {
pid_t last_pid;
int depth;
+ int depth_irq;
int ignore;
unsigned long enter_funcs[FTRACE_RETFUNC_DEPTH];
};
struct fgraph_data {
- struct fgraph_cpu_data *cpu_data;
+ struct fgraph_cpu_data __percpu *cpu_data;
/* Place to preserve last processed entry. */
struct ftrace_graph_ent_entry ent;
@@ -41,6 +45,7 @@ struct fgraph_data {
#define TRACE_GRAPH_PRINT_PROC 0x8
#define TRACE_GRAPH_PRINT_DURATION 0x10
#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
+#define TRACE_GRAPH_PRINT_IRQS 0x40
static struct tracer_opt trace_opts[] = {
/* Display overruns? (for self-debug purpose) */
@@ -55,13 +60,15 @@ static struct tracer_opt trace_opts[] = {
{ TRACER_OPT(funcgraph-duration, TRACE_GRAPH_PRINT_DURATION) },
/* Display absolute time of an entry */
{ TRACER_OPT(funcgraph-abstime, TRACE_GRAPH_PRINT_ABS_TIME) },
+ /* Display interrupts */
+ { TRACER_OPT(funcgraph-irqs, TRACE_GRAPH_PRINT_IRQS) },
{ } /* Empty entry */
};
static struct tracer_flags tracer_flags = {
/* Don't display overruns and proc by default */
.val = TRACE_GRAPH_PRINT_CPU | TRACE_GRAPH_PRINT_OVERHEAD |
- TRACE_GRAPH_PRINT_DURATION,
+ TRACE_GRAPH_PRINT_DURATION | TRACE_GRAPH_PRINT_IRQS,
.opts = trace_opts
};
@@ -204,6 +211,14 @@ int __trace_graph_entry(struct trace_array *tr,
return 1;
}
+static inline int ftrace_graph_ignore_irqs(void)
+{
+ if (!ftrace_graph_skip_irqs)
+ return 0;
+
+ return in_irq();
+}
+
int trace_graph_entry(struct