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6ce2082fd3
The fault-inject.h users across the kernel need to add a lot of #ifdef
CONFIG_FAULT_INJECTION to cater for shortcomings in the header. Make
fault-inject.h self-contained for CONFIG_FAULT_INJECTION=n, and add stubs
for DECLARE_FAULT_ATTR(), setup_fault_attr(), should_fail_ex(), and
should_fail() to allow removal of conditional compilation.
[akpm@linux-foundation.org: repair fallout from no longer including debugfs.h into fault-inject.h]
[akpm@linux-foundation.org: fix drivers/misc/xilinx_tmr_inject.c]
[akpm@linux-foundation.org: Add debugfs.h inclusion to more files, per Stephen]
Link: https://lkml.kernel.org/r/20240813121237.2382534-1-jani.nikula@intel.com
Fixes: 6ff1cb355e ("[PATCH] fault-injection capabilities infrastructure")
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/kconfig.h>
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#include <linux/types.h>
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#include <linux/fault-inject.h>
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <ufs/ufshcd.h>
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#include "ufs-fault-injection.h"
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static int ufs_fault_get(char *buffer, const struct kernel_param *kp);
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static int ufs_fault_set(const char *val, const struct kernel_param *kp);
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static const struct kernel_param_ops ufs_fault_ops = {
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.get = ufs_fault_get,
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.set = ufs_fault_set,
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};
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enum { FAULT_INJ_STR_SIZE = 80 };
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/*
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* For more details about fault injection, please refer to
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* Documentation/fault-injection/fault-injection.rst.
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*/
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static char g_trigger_eh_str[FAULT_INJ_STR_SIZE];
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module_param_cb(trigger_eh, &ufs_fault_ops, g_trigger_eh_str, 0644);
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MODULE_PARM_DESC(trigger_eh,
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"Fault injection. trigger_eh=<interval>,<probability>,<space>,<times>");
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static DECLARE_FAULT_ATTR(ufs_trigger_eh_attr);
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static char g_timeout_str[FAULT_INJ_STR_SIZE];
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module_param_cb(timeout, &ufs_fault_ops, g_timeout_str, 0644);
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MODULE_PARM_DESC(timeout,
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"Fault injection. timeout=<interval>,<probability>,<space>,<times>");
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static DECLARE_FAULT_ATTR(ufs_timeout_attr);
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static int ufs_fault_get(char *buffer, const struct kernel_param *kp)
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{
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const char *fault_str = kp->arg;
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return sysfs_emit(buffer, "%s\n", fault_str);
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}
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static int ufs_fault_set(const char *val, const struct kernel_param *kp)
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{
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struct fault_attr *attr = NULL;
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if (kp->arg == g_trigger_eh_str)
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attr = &ufs_trigger_eh_attr;
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else if (kp->arg == g_timeout_str)
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attr = &ufs_timeout_attr;
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if (WARN_ON_ONCE(!attr))
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return -EINVAL;
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if (!setup_fault_attr(attr, (char *)val))
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return -EINVAL;
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strscpy(kp->arg, val, FAULT_INJ_STR_SIZE);
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return 0;
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}
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void ufs_fault_inject_hba_init(struct ufs_hba *hba)
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{
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hba->trigger_eh_attr = ufs_trigger_eh_attr;
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hba->timeout_attr = ufs_timeout_attr;
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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fault_create_debugfs_attr("trigger_eh_inject", hba->debugfs_root, &hba->trigger_eh_attr);
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fault_create_debugfs_attr("timeout_inject", hba->debugfs_root, &hba->timeout_attr);
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#endif
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}
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bool ufs_trigger_eh(struct ufs_hba *hba)
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{
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return should_fail(&hba->trigger_eh_attr, 1);
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}
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bool ufs_fail_completion(struct ufs_hba *hba)
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{
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return should_fail(&hba->timeout_attr, 1);
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}
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