diff options
Diffstat (limited to 'mm/failslab.c')
| -rw-r--r-- | mm/failslab.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/mm/failslab.c b/mm/failslab.c index 0dd7b8f..c5f88f2 100644 --- a/mm/failslab.c +++ b/mm/failslab.c @@ -5,6 +5,10 @@ static struct { struct fault_attr attr; u32 ignore_gfp_wait; int cache_filter; +#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS + struct dentry *ignore_gfp_wait_file; + struct dentry *cache_filter_file; +#endif } failslab = { .attr = FAULT_ATTR_INITIALIZER, .ignore_gfp_wait = 1, @@ -34,25 +38,32 @@ __setup("failslab=", setup_failslab); #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS static int __init failslab_debugfs_init(void) { - struct dentry *dir; mode_t mode = S_IFREG | S_IRUSR | S_IWUSR; + struct dentry *dir; + int err; + + err = init_fault_attr_dentries(&failslab.attr, "failslab"); + if (err) + return err; + dir = failslab.attr.dentries.dir; - dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr); - if (IS_ERR(dir)) - return PTR_ERR(dir); + failslab.ignore_gfp_wait_file = + debugfs_create_bool("ignore-gfp-wait", mode, dir, + &failslab.ignore_gfp_wait); - if (!debugfs_create_bool("ignore-gfp-wait", mode, dir, - &failslab.ignore_gfp_wait)) - goto fail; - if (!debugfs_create_bool("cache-filter", mode, dir, - &failslab.cache_filter)) - goto fail; + failslab.cache_filter_file = + debugfs_create_bool("cache-filter", mode, dir, + &failslab.cache_filter); - return 0; -fail: - debugfs_remove_recursive(dir); + if (!failslab.ignore_gfp_wait_file || + !failslab.cache_filter_file) { + err = -ENOMEM; + debugfs_remove(failslab.cache_filter_file); + debugfs_remove(failslab.ignore_gfp_wait_file); + cleanup_fault_attr_dentries(&failslab.attr); + } - return -ENOMEM; + return err; } late_initcall(failslab_debugfs_init); |