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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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08dfb4ddee
This provides the ability to inject artifical errors to pSeries reconfig notifier chain callbacks. It is controlled through debugfs interface under /sys/kernel/debug/notifier-error-inject/pSeries-reconfig If the notifier call chain should be failed with some events notified, write the error code to "actions/<notifier event>/error". Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Greg KH <greg@kroah.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
#include <linux/kernel.h>
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#include <linux/module.h>
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#include <asm/pSeries_reconfig.h>
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#include "notifier-error-inject.h"
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static int priority;
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module_param(priority, int, 0);
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MODULE_PARM_DESC(priority, "specify pSeries reconfig notifier priority");
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static struct notifier_err_inject reconfig_err_inject = {
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.actions = {
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{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_RECONFIG_ADD) },
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{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_RECONFIG_REMOVE) },
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{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_DRCONF_MEM_ADD) },
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{ NOTIFIER_ERR_INJECT_ACTION(PSERIES_DRCONF_MEM_REMOVE) },
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{}
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}
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};
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static struct dentry *dir;
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static int err_inject_init(void)
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{
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int err;
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dir = notifier_err_inject_init("pSeries-reconfig",
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notifier_err_inject_dir, &reconfig_err_inject, priority);
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if (IS_ERR(dir))
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return PTR_ERR(dir);
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err = pSeries_reconfig_notifier_register(&reconfig_err_inject.nb);
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if (err)
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debugfs_remove_recursive(dir);
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return err;
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}
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static void err_inject_exit(void)
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{
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pSeries_reconfig_notifier_unregister(&reconfig_err_inject.nb);
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debugfs_remove_recursive(dir);
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}
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module_init(err_inject_init);
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module_exit(err_inject_exit);
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MODULE_DESCRIPTION("pSeries reconfig notifier error injection module");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
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