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-rw-r--r--lib/fault-inject.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index a7cb3afd132a..03468609d701 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -5,6 +5,7 @@
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/module.h>
+#include <linux/interrupt.h>
#include <linux/fault-inject.h>
/*
@@ -44,6 +45,11 @@ static void fail_dump(struct fault_attr *attr)
#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
+static int fail_task(struct fault_attr *attr, struct task_struct *task)
+{
+ return !in_interrupt() && task->make_it_fail;
+}
+
/*
* This code is stolen from failmalloc-1.0
* http://www.nongnu.org/failmalloc/
@@ -51,6 +57,9 @@ static void fail_dump(struct fault_attr *attr)
int should_fail(struct fault_attr *attr, ssize_t size)
{
+ if (attr->task_filter && !fail_task(attr, current))
+ return 0;
+
if (atomic_read(&attr->times) == 0)
return 0;
@@ -135,6 +144,9 @@ void cleanup_fault_attr_dentries(struct fault_attr *attr)
debugfs_remove(attr->dentries.verbose_file);
attr->dentries.verbose_file = NULL;
+ debugfs_remove(attr->dentries.task_filter_file);
+ attr->dentries.task_filter_file = NULL;
+
if (attr->dentries.dir)
WARN_ON(!simple_empty(attr->dentries.dir));
@@ -169,9 +181,12 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
attr->dentries.verbose_file =
debugfs_create_ul("verbose", mode, dir, &attr->verbose);
+ attr->dentries.task_filter_file = debugfs_create_bool("task-filter",
+ mode, dir, &attr->task_filter);
+
if (!attr->dentries.probability_file || !attr->dentries.interval_file
|| !attr->dentries.times_file || !attr->dentries.space_file
- || !attr->dentries.verbose_file)
+ || !attr->dentries.verbose_file || !attr->dentries.task_filter_file)
goto fail;
return 0;