61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#include <linux/fault-inject.h>
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#include <linux/gfp.h>
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static struct {
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struct fault_attr attr;
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u32 ignore_gfp_wait;
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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struct dentry *ignore_gfp_wait_file;
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#endif
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} failslab = {
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.attr = FAULT_ATTR_INITIALIZER,
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.ignore_gfp_wait = 1,
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};
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bool should_failslab(size_t size, gfp_t gfpflags)
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{
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if (gfpflags & __GFP_NOFAIL)
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return false;
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if (failslab.ignore_gfp_wait && (gfpflags & __GFP_WAIT))
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return false;
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return should_fail(&failslab.attr, size);
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}
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static int __init setup_failslab(char *str)
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{
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return setup_fault_attr(&failslab.attr, str);
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}
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__setup("failslab=", setup_failslab);
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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static int __init failslab_debugfs_init(void)
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{
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mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
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struct dentry *dir;
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int err;
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err = init_fault_attr_dentries(&failslab.attr, "failslab");
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if (err)
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return err;
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dir = failslab.attr.dentries.dir;
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failslab.ignore_gfp_wait_file =
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debugfs_create_bool("ignore-gfp-wait", mode, dir,
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&failslab.ignore_gfp_wait);
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if (!failslab.ignore_gfp_wait_file) {
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err = -ENOMEM;
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debugfs_remove(failslab.ignore_gfp_wait_file);
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cleanup_fault_attr_dentries(&failslab.attr);
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}
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return err;
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}
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late_initcall(failslab_debugfs_init);
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#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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