Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing/filters: return proper error code when writing filter file
tracing/filters: allow user input integer to be oct or hex
tracing/filters: fix NULL pointer dereference
tracing/filters: NIL-terminate user input filter
ftrace: Output REC->var instead of __entry->var for trace format
Make __stringify support variable argument macros too
tracing: fix document references
tracing: fix splice return too large
tracing: update file->f_pos when splice(2) it
tracing: allocate page when needed
tracing: disable seeking for trace_pipe_raw
diff --git a/include/linux/stringify.h b/include/linux/stringify.h
index 0b43883..841cec8 100644
--- a/include/linux/stringify.h
+++ b/include/linux/stringify.h
@@ -6,7 +6,7 @@
* converts to "bar".
*/
-#define __stringify_1(x) #x
-#define __stringify(x) __stringify_1(x)
+#define __stringify_1(x...) #x
+#define __stringify(x...) __stringify_1(x)
#endif /* !__LINUX_STRINGIFY_H */
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 2246141..417d198 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -312,7 +312,7 @@
and profile kernel code.
This requires an userspace application to use. See
- Documentation/vm/kmemtrace.txt for more information.
+ Documentation/trace/kmemtrace.txt for more information.
Saying Y will make the kernel somewhat larger and slower. However,
if you disable kmemtrace at run-time or boot-time, the performance
@@ -403,7 +403,7 @@
implementation and works via page faults. Tracing is disabled by
default and can be enabled at run-time.
- See Documentation/tracers/mmiotrace.txt.
+ See Documentation/trace/mmiotrace.txt.
If you are not helping to develop drivers, say N.
config MMIOTRACE_TEST
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 9d28476..1ce5dc6 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3277,19 +3277,13 @@
info->tr = &global_trace;
info->cpu = cpu;
- info->spare = ring_buffer_alloc_read_page(info->tr->buffer);
+ info->spare = NULL;
/* Force reading ring buffer for first read */
info->read = (unsigned int)-1;
- if (!info->spare)
- goto out;
filp->private_data = info;
- return 0;
-
- out:
- kfree(info);
- return -ENOMEM;
+ return nonseekable_open(inode, filp);
}
static ssize_t
@@ -3304,6 +3298,11 @@
if (!count)
return 0;
+ if (!info->spare)
+ info->spare = ring_buffer_alloc_read_page(info->tr->buffer);
+ if (!info->spare)
+ return -ENOMEM;
+
/* Do we have previous read data to read? */
if (info->read < PAGE_SIZE)
goto read;
@@ -3342,7 +3341,8 @@
{
struct ftrace_buffer_info *info = file->private_data;
- ring_buffer_free_read_page(info->tr->buffer, info->spare);
+ if (info->spare)
+ ring_buffer_free_read_page(info->tr->buffer, info->spare);
kfree(info);
return 0;
@@ -3428,14 +3428,19 @@
int size, i;
size_t ret;
- /*
- * We can't seek on a buffer input
- */
- if (unlikely(*ppos))
- return -ESPIPE;
+ if (*ppos & (PAGE_SIZE - 1)) {
+ WARN_ONCE(1, "Ftrace: previous read must page-align\n");
+ return -EINVAL;
+ }
+ if (len & (PAGE_SIZE - 1)) {
+ WARN_ONCE(1, "Ftrace: splice_read should page-align\n");
+ if (len < PAGE_SIZE)
+ return -EINVAL;
+ len &= PAGE_MASK;
+ }
- for (i = 0; i < PIPE_BUFFERS && len; i++, len -= size) {
+ for (i = 0; i < PIPE_BUFFERS && len; i++, len -= PAGE_SIZE) {
struct page *page;
int r;
@@ -3474,6 +3479,7 @@
spd.partial[i].offset = 0;
spd.partial[i].private = (unsigned long)ref;
spd.nr_pages++;
+ *ppos += PAGE_SIZE;
}
spd.nr_pages = i;
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 64ec4d2..576f4fa 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -503,6 +503,7 @@
if (copy_from_user(&buf, ubuf, cnt))
return -EFAULT;
+ buf[cnt] = '\0';
pred = kzalloc(sizeof(*pred), GFP_KERNEL);
if (!pred)
@@ -520,9 +521,10 @@
return cnt;
}
- if (filter_add_pred(call, pred)) {
+ err = filter_add_pred(call, pred);
+ if (err < 0) {
filter_free_pred(pred);
- return -EINVAL;
+ return err;
}
*ppos += cnt;
@@ -569,6 +571,7 @@
if (copy_from_user(&buf, ubuf, cnt))
return -EFAULT;
+ buf[cnt] = '\0';
pred = kzalloc(sizeof(*pred), GFP_KERNEL);
if (!pred)
@@ -586,10 +589,11 @@
return cnt;
}
- if (filter_add_subsystem_pred(system, pred)) {
+ err = filter_add_subsystem_pred(system, pred);
+ if (err < 0) {
filter_free_subsystem_preds(system);
filter_free_pred(pred);
- return -EINVAL;
+ return err;
}
*ppos += cnt;
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 026be41..e03cbf1 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -215,7 +215,7 @@
}
}
- return -ENOMEM;
+ return -ENOSPC;
}
static int is_string_field(const char *type)
@@ -319,7 +319,7 @@
}
if (i == MAX_FILTER_PRED)
- return -EINVAL;
+ return -ENOSPC;
events_for_each(call) {
int err;
@@ -410,16 +410,22 @@
}
}
+ if (!val_str) {
+ pred->field_name = NULL;
+ return -EINVAL;
+ }
+
pred->field_name = kstrdup(pred->field_name, GFP_KERNEL);
if (!pred->field_name)
return -ENOMEM;
- pred->val = simple_strtoull(val_str, &tmp, 10);
+ pred->val = simple_strtoull(val_str, &tmp, 0);
if (tmp == val_str) {
pred->str_val = kstrdup(val_str, GFP_KERNEL);
if (!pred->str_val)
return -ENOMEM;
- }
+ } else if (*tmp != '\0')
+ return -EINVAL;
return 0;
}
diff --git a/kernel/trace/trace_events_stage_2.h b/kernel/trace/trace_events_stage_2.h
index 30743f7..d363c66 100644
--- a/kernel/trace/trace_events_stage_2.h
+++ b/kernel/trace/trace_events_stage_2.h
@@ -105,10 +105,10 @@
return 0;
#undef __entry
-#define __entry "REC"
+#define __entry REC
#undef TP_printk
-#define TP_printk(fmt, args...) "%s, %s\n", #fmt, #args
+#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
#undef TP_fast_assign
#define TP_fast_assign(args...) args