mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 13:36:45 +07:00
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
|
#include <linux/fault-inject.h>
|
||
|
|
|
||
|
|
static struct {
|
||
|
|
struct fault_attr attr;
|
||
|
|
u32 ignore_gfp_wait;
|
||
|
|
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
|
||
|
|
struct dentry *ignore_gfp_wait_file;
|
||
|
|
#endif
|
||
|
|
} failslab = {
|
||
|
|
.attr = FAULT_ATTR_INITIALIZER,
|
||
|
|
.ignore_gfp_wait = 1,
|
||
|
|
};
|
||
|
|
|
||
|
|
bool should_failslab(size_t size, gfp_t gfpflags)
|
||
|
|
{
|
||
|
|
if (gfpflags & __GFP_NOFAIL)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if (failslab.ignore_gfp_wait && (gfpflags & __GFP_WAIT))
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
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;
|
||
|
|
|
||
|
|
failslab.ignore_gfp_wait_file =
|
||
|
|
debugfs_create_bool("ignore-gfp-wait", mode, dir,
|
||
|
|
&failslab.ignore_gfp_wait);
|
||
|
|
|
||
|
|
if (!failslab.ignore_gfp_wait_file) {
|
||
|
|
err = -ENOMEM;
|
||
|
|
debugfs_remove(failslab.ignore_gfp_wait_file);
|
||
|
|
cleanup_fault_attr_dentries(&failslab.attr);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
late_initcall(failslab_debugfs_init);
|
||
|
|
|
||
|
|
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
|