diff options
| -rw-r--r-- | lib/Kconfig.debug | 10 | ||||
| -rw-r--r-- | lib/fault-inject.c | 41 |
2 files changed, 29 insertions, 22 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 4448f91b865..3f3e7403dca 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -411,8 +411,6 @@ config LKDTM config FAULT_INJECTION bool "Fault-injection framework" depends on DEBUG_KERNEL - depends on STACKTRACE - select FRAME_POINTER help Provide fault-injection framework. For more details, see Documentation/fault-injection/. @@ -440,3 +438,11 @@ config FAULT_INJECTION_DEBUG_FS depends on FAULT_INJECTION && SYSFS && DEBUG_FS help Enable configuration of fault-injection capabilities via debugfs. + +config FAULT_INJECTION_STACKTRACE_FILTER + bool "stacktrace filter for fault-injection capabilities" + depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT + select STACKTRACE + select FRAME_POINTER + help + Provide stacktrace filter for fault-injection capabilities diff --git a/lib/fault-inject.c b/lib/fault-inject.c index b5a90fc056d..0fabd12c39d 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -55,7 +55,7 @@ static bool fail_task(struct fault_attr *attr, struct task_struct *task) #define MAX_STACK_TRACE_DEPTH 32 -#if defined(CONFIG_STACKTRACE) +#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER static bool fail_stacktrace(struct fault_attr *attr) { @@ -90,17 +90,10 @@ static bool fail_stacktrace(struct fault_attr *attr) static inline bool fail_stacktrace(struct fault_attr *attr) { - static bool firsttime = true; - - if (firsttime) { - printk(KERN_WARNING - "This architecture does not implement save_stack_trace()\n"); - firsttime = false; - } - return false; + return true; } -#endif +#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ /* * This code is stolen from failmalloc-1.0 @@ -217,6 +210,8 @@ void cleanup_fault_attr_dentries(struct fault_attr *attr) debugfs_remove(attr->dentries.task_filter_file); attr->dentries.task_filter_file = NULL; +#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER + debugfs_remove(attr->dentries.stacktrace_depth_file); attr->dentries.stacktrace_depth_file = NULL; @@ -232,6 +227,8 @@ void cleanup_fault_attr_dentries(struct fault_attr *attr) debugfs_remove(attr->dentries.reject_end_file); attr->dentries.reject_end_file = NULL; +#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ + if (attr->dentries.dir) WARN_ON(!simple_empty(attr->dentries.dir)); @@ -269,6 +266,13 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name) 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.task_filter_file) + goto fail; + +#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER + attr->dentries.stacktrace_depth_file = debugfs_create_ul_MAX_STACK_TRACE_DEPTH( "stacktrace-depth", mode, dir, &attr->stacktrace_depth); @@ -285,18 +289,15 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name) attr->dentries.reject_end_file = debugfs_create_ul("reject-end", mode, dir, &attr->reject_end); - - if (!attr->dentries.probability_file || !attr->dentries.interval_file - || !attr->dentries.times_file || !attr->dentries.space_file - || !attr->dentries.verbose_file || !attr->dentries.task_filter_file - || !attr->dentries.stacktrace_depth_file - || !attr->dentries.require_start_file - || !attr->dentries.require_end_file - || !attr->dentries.reject_start_file - || !attr->dentries.reject_end_file - ) + if (!attr->dentries.stacktrace_depth_file || + !attr->dentries.require_start_file || + !attr->dentries.require_end_file || + !attr->dentries.reject_start_file || + !attr->dentries.reject_end_file) goto fail; +#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ + return 0; fail: cleanup_fault_attr_dentries(attr); |