]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - mm/failslab.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/fault-inject.h>
3 #include <linux/slab.h>
8 struct fault_attr attr
;
9 bool ignore_gfp_reclaim
;
12 .attr
= FAULT_ATTR_INITIALIZER
,
13 .ignore_gfp_reclaim
= true,
14 .cache_filter
= false,
17 bool __should_failslab(struct kmem_cache
*s
, gfp_t gfpflags
)
19 /* No fault-injection for bootstrap cache */
20 if (unlikely(s
== kmem_cache
))
23 if (gfpflags
& __GFP_NOFAIL
)
26 if (failslab
.ignore_gfp_reclaim
&& (gfpflags
& __GFP_RECLAIM
))
29 if (failslab
.cache_filter
&& !(s
->flags
& SLAB_FAILSLAB
))
32 return should_fail(&failslab
.attr
, s
->object_size
);
35 static int __init
setup_failslab(char *str
)
37 return setup_fault_attr(&failslab
.attr
, str
);
39 __setup("failslab=", setup_failslab
);
41 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
42 static int __init
failslab_debugfs_init(void)
45 umode_t mode
= S_IFREG
| 0600;
47 dir
= fault_create_debugfs_attr("failslab", NULL
, &failslab
.attr
);
51 debugfs_create_bool("ignore-gfp-wait", mode
, dir
,
52 &failslab
.ignore_gfp_reclaim
);
53 debugfs_create_bool("cache-filter", mode
, dir
,
54 &failslab
.cache_filter
);
59 late_initcall(failslab_debugfs_init
);
61 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */