2 files changed, 28 insertions, 10 deletions

diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index c6f996f2abb6..798fad9e420d 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -5,6 +5,7 @@
 
 #include <linux/types.h>
 #include <linux/debugfs.h>
+#include <linux/ratelimit.h>
 #include <linux/atomic.h>
 
 /*
@@ -25,14 +26,18 @@ struct fault_attr {
         unsigned long reject_end;
 
         unsigned long count;
+        struct ratelimit_state ratelimit_state;
+        struct dentry *dname;
 };
 
-#define FAULT_ATTR_INITIALIZER {                                \
-                .interval = 1,                                  \
-                .times = ATOMIC_INIT(1),                        \
-                .require_end = ULONG_MAX,                       \
-                .stacktrace_depth = 32,                         \
-                .verbose = 2,                                   \
+#define FAULT_ATTR_INITIALIZER {                                        \
+                .interval = 1,                                          \
+                .times = ATOMIC_INIT(1),                                \
+                .require_end = ULONG_MAX,                               \
+                .stacktrace_depth = 32,                                 \
+                .ratelimit_state = RATELIMIT_STATE_INIT_DISABLED,       \
+                .verbose = 2,                                           \
+                .dname = NULL,                                          \
         }
 
 #define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index d7d501ea856d..f1cdeb024d17 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -40,10 +40,16 @@ EXPORT_SYMBOL_GPL(setup_fault_attr);
 
 static void fail_dump(struct fault_attr *attr)
 {
-        if (attr->verbose > 0)
-                printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure\n");
-        if (attr->verbose > 1)
-                dump_stack();
+        if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) {
+                printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure.\n"
+                       "name %pd, interval %lu, probability %lu, "
+                       "space %d, times %d\n", attr->dname,
+                       attr->probability, attr->interval,
+                       atomic_read(&attr->space),
+                       atomic_read(&attr->times));
+                if (attr->verbose > 1)
+                        dump_stack();
+        }
 }
 
 #define atomic_dec_not_zero(v)          atomic_add_unless((v), -1, 0)
@@ -202,6 +208,12 @@ struct dentry *fault_create_debugfs_attr(const char *name,
                 goto fail;
         if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose))
                 goto fail;
+        if (!debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir,
+                                &attr->ratelimit_state.interval))
+                goto fail;
+        if (!debugfs_create_u32("verbose_ratelimit_burst", mode, dir,
+                                &attr->ratelimit_state.burst))
+                goto fail;
         if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter))
                 goto fail;
 
@@ -222,6 +234,7 @@ struct dentry *fault_create_debugfs_attr(const char *name,
 
 #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
 
+        attr->dname = dget(dir);
         return dir;
 fail:
         debugfs_remove_recursive(dir);