[PATCH 3/4 -next] fault-injection: make some stack filter attrs more readable
From: Wei Yongjun
Date: Wed Aug 17 2022 - 03:45:46 EST
Attributes of stack filter are show as unsigned decimal, such
as 'require-start', 'require-end'. This patch change to
show them as unsigned hexadecimal for more readable.
Before:
$ echo 0xffffffffc0257000 > /sys/kernel/debug/failslab/require-start
$ cat /sys/kernel/debug/failslab/require-start
18446744072638263296
After:
$ echo 0xffffffffc0257000 > /sys/kernel/debug/failslab/require-start
$ cat /sys/kernel/debug/failslab/require-start
0xffffffffc0257000
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
lib/fault-inject.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index 515fc5aaf032..deca05e7c9b3 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -179,6 +179,14 @@ static void debugfs_create_ul(const char *name, umode_t mode,
#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
+DEFINE_SIMPLE_ATTRIBUTE(fops_xl, debugfs_ul_get, debugfs_ul_set, "0x%llx\n");
+
+static void debugfs_create_xl(const char *name, umode_t mode,
+ struct dentry *parent, unsigned long *value)
+{
+ debugfs_create_file(name, mode, parent, value, &fops_xl);
+}
+
static int debugfs_stacktrace_depth_set(void *data, u64 val)
{
*(unsigned long *)data =
@@ -223,10 +231,10 @@ struct dentry *fault_create_debugfs_attr(const char *name,
#ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
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);
+ debugfs_create_xl("require-start", mode, dir, &attr->require_start);
+ debugfs_create_xl("require-end", mode, dir, &attr->require_end);
+ debugfs_create_xl("reject-start", mode, dir, &attr->reject_start);
+ debugfs_create_xl("reject-end", mode, dir, &attr->reject_end);
#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
attr->dname = dget(dir);
--
2.34.1