From df87ecbf19109bab04a92df047a9949838206abc Mon Sep 17 00:00:00 2001 From: Per Forlin Date: Fri, 19 Aug 2011 14:52:36 +0200 Subject: fault-inject: export fault injection functions Export symbols should_fail() and fault_create_debugfs_attr() in order to let modules utilize the fault injection framework. Signed-off-by: Per Forlin Acked-by: Akinobu Mita Signed-off-by: Chris Ball --- lib/fault-inject.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'lib') diff --git a/lib/fault-inject.c b/lib/fault-inject.c index f193b779644..328d43357ed 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -130,6 +130,7 @@ bool should_fail(struct fault_attr *attr, ssize_t size) return true; } +EXPORT_SYMBOL_GPL(should_fail); #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS @@ -243,5 +244,6 @@ fail: return ERR_PTR(-ENOMEM); } +EXPORT_SYMBOL_GPL(fault_create_debugfs_attr); #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */ -- cgit v1.2.3 From 1b676f70c108cda90cf9d114d16c677584400efc Mon Sep 17 00:00:00 2001 From: Per Forlin Date: Fri, 19 Aug 2011 14:52:37 +0200 Subject: mmc: core: add random fault injection This adds support to inject data errors after a completed host transfer. The mmc core will return error even though the host transfer is successful. This simple fault injection proved to be very useful to test the non-blocking error handling in the mmc_blk_issue_rw_rq(). Random faults can also test how the host driver handles pre_req() and post_req() in case of errors. Signed-off-by: Per Forlin Acked-by: Akinobu Mita Reviewed-by: Linus Walleij Signed-off-by: Chris Ball --- lib/Kconfig.debug | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'lib') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c0cb9c4bc46..1c7dbbf9e44 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1070,6 +1070,17 @@ config FAIL_IO_TIMEOUT Only works with drivers that use the generic timeout handling, for others it wont do anything. +config FAIL_MMC_REQUEST + bool "Fault-injection capability for MMC IO" + select DEBUG_FS + depends on FAULT_INJECTION && MMC + help + Provide fault-injection capability for MMC IO. + This will make the mmc core return data errors. This is + useful to test the error handling in the mmc block device + and to test how the mmc host driver handles retries from + the block device. + config FAULT_INJECTION_DEBUG_FS bool "Debugfs entries for fault-injection capabilities" depends on FAULT_INJECTION && SYSFS && DEBUG_FS -- cgit v1.2.3 From 6cba00eaa95c1ace1fb511f534b233ae302ccb2e Mon Sep 17 00:00:00 2001 From: Per Forlin Date: Tue, 13 Sep 2011 23:03:28 +0200 Subject: fault-inject: export setup_fault_attr() mmc_core module needs to use setup_fault_attr() in order to set fault injection attributes during module load time. Signed-off-by: Per Forlin Reviewed-by: Akinobu Mita Signed-off-by: Chris Ball --- lib/fault-inject.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/fault-inject.c b/lib/fault-inject.c index 328d43357ed..4f7554025e3 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -14,7 +14,7 @@ * setup_fault_attr() is a helper function for various __setup handlers, so it * returns 0 on error, because that is what __setup handlers do. */ -int __init setup_fault_attr(struct fault_attr *attr, char *str) +int setup_fault_attr(struct fault_attr *attr, char *str) { unsigned long probability; unsigned long interval; @@ -36,6 +36,7 @@ int __init setup_fault_attr(struct fault_attr *attr, char *str) return 1; } +EXPORT_SYMBOL_GPL(setup_fault_attr); static void fail_dump(struct fault_attr *attr) { -- cgit v1.2.3