diff options
| -rw-r--r-- | include/linux/fault-inject.h | 17 | ||||
| -rw-r--r-- | lib/fault-inject.c | 21 |
2 files changed, 28 insertions, 10 deletions
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h index c6f996f..798fad9 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 d7d501e..f1cdeb0 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); |
