[PATCH] fault injection: process filtering for fault-injection capabilities

This patch provides process filtering feature.
The process filter allows failing only permitted processes
by /proc/<pid>/make-it-fail

Please see the example that demostrates how to inject slab allocation
failures into module init/cleanup code
in Documentation/fault-injection/fault-injection.txt

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 4df4902bc8d8..a525f9b9f015 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -17,6 +17,7 @@ struct fault_attr {
         atomic_t times;
         atomic_t space;
         unsigned long verbose;
+        u32 task_filter;
 
         unsigned long count;
 
@@ -30,6 +31,7 @@ struct fault_attr {
                 struct dentry *times_file;
                 struct dentry *space_file;
                 struct dentry *verbose_file;
+                struct dentry *task_filter_file;
         } dentries;
 
 #endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f0317edea141..ad9c46071ff8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1045,6 +1045,9 @@ struct task_struct {
 #ifdef  CONFIG_TASK_DELAY_ACCT
         struct task_delay_info *delays;
 #endif
+#ifdef CONFIG_FAULT_INJECTION
+        int make_it_fail;
+#endif
 };
 
 static inline pid_t process_group(struct task_struct *tsk)