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fault-injection: use debugfs_remove_recursive

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Use debugfs_remove_recursive() to simplify initialization and
deinitialization of fault injection debugfs files.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2011-07-26 16:09:02 -07:00 committed by Linus Torvalds
parent 8307fc257c
commit 7f5ddcc8d3
4 changed files with 31 additions and 108 deletions
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18
include/linux/fault-inject.h
View file

@ -27,23 +27,7 @@ struct fault_attr {
unsigned long count;
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
struct {
struct dentry *dir;
struct dentry *probability_file;
struct dentry *interval_file;
struct dentry *times_file;
struct dentry *space_file;
struct dentry *verbose_file;
struct dentry *task_filter_file;
struct dentry *stacktrace_depth_file;
struct dentry *require_start_file;
struct dentry *require_end_file;
struct dentry *reject_start_file;
struct dentry *reject_end_file;
} dentries;
struct dentry *dir;
#endif
};

117
lib/fault-inject.c
View file

@ -199,48 +199,7 @@ static struct dentry *debugfs_create_atomic_t(const char *name, mode_t mode,
void cleanup_fault_attr_dentries(struct fault_attr *attr)
{
debugfs_remove(attr->dentries.probability_file);
attr->dentries.probability_file = NULL;
debugfs_remove(attr->dentries.interval_file);
attr->dentries.interval_file = NULL;
debugfs_remove(attr->dentries.times_file);
attr->dentries.times_file = NULL;
debugfs_remove(attr->dentries.space_file);
attr->dentries.space_file = NULL;
debugfs_remove(attr->dentries.verbose_file);
attr->dentries.verbose_file = NULL;
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;
debugfs_remove(attr->dentries.require_start_file);
attr->dentries.require_start_file = NULL;
debugfs_remove(attr->dentries.require_end_file);
attr->dentries.require_end_file = NULL;
debugfs_remove(attr->dentries.reject_start_file);
attr->dentries.reject_start_file = NULL;
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));
debugfs_remove(attr->dentries.dir);
attr->dentries.dir = NULL;
debugfs_remove_recursive(attr->dir);
}
int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
@ -248,66 +207,46 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
struct dentry *dir;
memset(&attr->dentries, 0, sizeof(attr->dentries));
dir = debugfs_create_dir(name, NULL);
if (!dir)
return -ENOMEM;
attr->dir = dir;
if (!debugfs_create_ul("probability", mode, dir, &attr->probability))
goto fail;
attr->dentries.dir = dir;
attr->dentries.probability_file =
debugfs_create_ul("probability", mode, dir, &attr->probability);
attr->dentries.interval_file =
debugfs_create_ul("interval", mode, dir, &attr->interval);
attr->dentries.times_file =
debugfs_create_atomic_t("times", mode, dir, &attr->times);
attr->dentries.space_file =
debugfs_create_atomic_t("space", mode, dir, &attr->space);
attr->dentries.verbose_file =
debugfs_create_ul("verbose", mode, dir, &attr->verbose);
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)
if (!debugfs_create_ul("interval", mode, dir, &attr->interval))
goto fail;
if (!debugfs_create_atomic_t("times", mode, dir, &attr->times))
goto fail;
if (!debugfs_create_atomic_t("space", mode, dir, &attr->space))
goto fail;
if (!debugfs_create_ul("verbose", mode, dir, &attr->verbose))
goto fail;
if (!debugfs_create_bool("task-filter", mode, dir, &attr->task_filter))
goto fail;
#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
attr->dentries.stacktrace_depth_file =
debugfs_create_stacktrace_depth(
"stacktrace-depth", mode, dir, &attr->stacktrace_depth);
attr->dentries.require_start_file =
debugfs_create_ul("require-start", mode, dir, &attr->require_start);
attr->dentries.require_end_file =
debugfs_create_ul("require-end", mode, dir, &attr->require_end);
attr->dentries.reject_start_file =
debugfs_create_ul("reject-start", mode, dir, &attr->reject_start);
attr->dentries.reject_end_file =
debugfs_create_ul("reject-end", mode, dir, &attr->reject_end);
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)
if (!debugfs_create_stacktrace_depth("stacktrace-depth", mode, dir,
&attr->stacktrace_depth))
goto fail;
if (!debugfs_create_ul("require-start", mode, dir,
&attr->require_start))
goto fail;
if (!debugfs_create_ul("require-end", mode, dir, &attr->require_end))
goto fail;
if (!debugfs_create_ul("reject-start", mode, dir, &attr->reject_start))
goto fail;
if (!debugfs_create_ul("reject-end", mode, dir, &attr->reject_end))
goto fail;
#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
return 0;
fail:
cleanup_fault_attr_dentries(attr);
debugfs_remove_recursive(attr->dir);
return -ENOMEM;
}

2
mm/failslab.c
View file

@ -45,7 +45,7 @@ static int __init failslab_debugfs_init(void)
err = init_fault_attr_dentries(&failslab.attr, "failslab");
if (err)
return err;
dir = failslab.attr.dentries.dir;
dir = failslab.attr.dir;
failslab.ignore_gfp_wait_file =
debugfs_create_bool("ignore-gfp-wait", mode, dir,

2
mm/page_alloc.c
View file

@ -1424,7 +1424,7 @@ static int __init fail_page_alloc_debugfs(void)
"fail_page_alloc");
if (err)
return err;
dir = fail_page_alloc.attr.dentries.dir;
dir = fail_page_alloc.attr.dir;
fail_page_alloc.ignore_gfp_wait_file =
debugfs_create_bool("ignore-gfp-wait", mode, dir,