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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-12 11:58:28 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-18 13:47:24 +0200 |
commit | 053cf51040ed0ebc56c1b58453ad502dc4d0927b (patch) | |
tree | 40e8117708017d79d93c2093ccef4b0165d8c269 | |
parent | 9fd714cd7f4676e8ff3f840911a8d64cacbeab8b (diff) | |
download | linux-053cf51040ed0ebc56c1b58453ad502dc4d0927b.tar.gz linux-053cf51040ed0ebc56c1b58453ad502dc4d0927b.tar.bz2 linux-053cf51040ed0ebc56c1b58453ad502dc4d0927b.zip |
fault-inject: clean up debugfs file creation logic
There is no need to check the return value of a debugfs_create_file
call, a caller should never change what they do depending on if debugfs
is working properly or not, so remove the checks, simplifying the logic
in the file a lot.
Also fix up the error check for debugfs_create_dir() which was not
returning NULL for an error, but rather a error pointer.
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | lib/fault-inject.c | 73 |
1 files changed, 26 insertions, 47 deletions
diff --git a/lib/fault-inject.c b/lib/fault-inject.c index 3cb21b2bf088..8186ca84910b 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -166,10 +166,10 @@ static int debugfs_ul_get(void *data, u64 *val) DEFINE_SIMPLE_ATTRIBUTE(fops_ul, debugfs_ul_get, debugfs_ul_set, "%llu\n"); -static struct dentry *debugfs_create_ul(const char *name, umode_t mode, - struct dentry *parent, unsigned long *value) +static void debugfs_create_ul(const char *name, umode_t mode, + struct dentry *parent, unsigned long *value) { - return debugfs_create_file(name, mode, parent, value, &fops_ul); + debugfs_create_file(name, mode, parent, value, &fops_ul); } #ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER @@ -185,12 +185,11 @@ static int debugfs_stacktrace_depth_set(void *data, u64 val) DEFINE_SIMPLE_ATTRIBUTE(fops_stacktrace_depth, debugfs_ul_get, debugfs_stacktrace_depth_set, "%llu\n"); -static struct dentry *debugfs_create_stacktrace_depth( - const char *name, umode_t mode, - struct dentry *parent, unsigned long *value) +static void debugfs_create_stacktrace_depth(const char *name, umode_t mode, + struct dentry *parent, + unsigned long *value) { - return debugfs_create_file(name, mode, parent, value, - &fops_stacktrace_depth); + debugfs_create_file(name, mode, parent, value, &fops_stacktrace_depth); } #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ @@ -202,51 +201,31 @@ struct dentry *fault_create_debugfs_attr(const char *name, struct dentry *dir; dir = debugfs_create_dir(name, parent); - if (!dir) - return ERR_PTR(-ENOMEM); - - if (!debugfs_create_ul("probability", mode, dir, &attr->probability)) - goto fail; - 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_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; + if (IS_ERR(dir)) + return dir; + + debugfs_create_ul("probability", mode, dir, &attr->probability); + debugfs_create_ul("interval", mode, dir, &attr->interval); + debugfs_create_atomic_t("times", mode, dir, &attr->times); + debugfs_create_atomic_t("space", mode, dir, &attr->space); + debugfs_create_ul("verbose", mode, dir, &attr->verbose); + debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir, + &attr->ratelimit_state.interval); + debugfs_create_u32("verbose_ratelimit_burst", mode, dir, + &attr->ratelimit_state.burst); + debugfs_create_bool("task-filter", mode, dir, &attr->task_filter); #ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER - - 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; - + debugfs_create_stacktrace_depth("stacktrace-depth", mode, dir, + &attr->stacktrace_depth); + debugfs_create_ul("require-start", mode, dir, &attr->require_start); + debugfs_create_ul("require-end", mode, dir, &attr->require_end); + debugfs_create_ul("reject-start", mode, dir, &attr->reject_start); + debugfs_create_ul("reject-end", mode, dir, &attr->reject_end); #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */ attr->dname = dget(dir); return dir; -fail: - debugfs_remove_recursive(dir); - - return ERR_PTR(-ENOMEM); } EXPORT_SYMBOL_GPL(fault_create_debugfs_attr); |