621a5f7ad9
Its a bit odd that debugfs_create_bool() takes 'u32 *' as an argument,
when all it needs is a boolean pointer.
It would be better to update this API to make it accept 'bool *'
instead, as that will make it more consistent and often more convenient.
Over that bool takes just a byte.
That required updates to all user sites as well, in the same commit
updating the API. regmap core was also using
debugfs_{read|write}_file_bool(), directly and variable types were
updated for that to be bool as well.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#include <linux/fault-inject.h>
|
|
#include <linux/slab.h>
|
|
|
|
static struct {
|
|
struct fault_attr attr;
|
|
bool ignore_gfp_wait;
|
|
bool cache_filter;
|
|
} failslab = {
|
|
.attr = FAULT_ATTR_INITIALIZER,
|
|
.ignore_gfp_wait = true,
|
|
.cache_filter = false,
|
|
};
|
|
|
|
bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags)
|
|
{
|
|
if (gfpflags & __GFP_NOFAIL)
|
|
return false;
|
|
|
|
if (failslab.ignore_gfp_wait && (gfpflags & __GFP_WAIT))
|
|
return false;
|
|
|
|
if (failslab.cache_filter && !(cache_flags & SLAB_FAILSLAB))
|
|
return false;
|
|
|
|
return should_fail(&failslab.attr, size);
|
|
}
|
|
|
|
static int __init setup_failslab(char *str)
|
|
{
|
|
return setup_fault_attr(&failslab.attr, str);
|
|
}
|
|
__setup("failslab=", setup_failslab);
|
|
|
|
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
|
|
static int __init failslab_debugfs_init(void)
|
|
{
|
|
struct dentry *dir;
|
|
umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
|
|
|
|
dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
|
|
if (IS_ERR(dir))
|
|
return PTR_ERR(dir);
|
|
|
|
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;
|
|
|
|
return 0;
|
|
fail:
|
|
debugfs_remove_recursive(dir);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
late_initcall(failslab_debugfs_init);
|
|
|
|
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
|