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Subject: Re: [PATCH V2 2/5] ubi: Split io_failures into write_failure and
 erase_failure
To:     ZhaoLong Wang <wangzhaolong1@huawei.com>, <richard@nod.at>,
        <miquel.raynal@bootlin.com>, <vigneshr@ti.com>
CC:     <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
        <yi.zhang@huawei.com>
References: <20230718085119.3885747-1-wangzhaolong1@huawei.com>
 <20230718085119.3885747-3-wangzhaolong1@huawei.com>
From:   Zhihao Cheng <chengzhihao1@huawei.com>
Message-ID: <bb696f09-a89c-1c16-0154-961c4dabfed9@huawei.com>
Date:   Mon, 31 Jul 2023 19:24:47 +0800
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?? 2023/7/18 16:51, ZhaoLong Wang д??:
> The emulate_io_failures debugfs entry controls both write
> failure and erase failure. This patch split io_failures
> to write_failure and erase_failure.
> 
> Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>
> ---
>   drivers/mtd/ubi/debug.c | 13 +++++++++----
>   drivers/mtd/ubi/debug.h | 14 ++++++++------
>   2 files changed, 17 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
> index 9ca584da32c6..7826bc8166e8 100644
> --- a/drivers/mtd/ubi/debug.c
> +++ b/drivers/mtd/ubi/debug.c
> @@ -14,7 +14,8 @@
>   
>   #ifdef CONFIG_MTD_UBI_FAULT_INJECTION
>   static DECLARE_FAULT_ATTR(fault_bitflips_attr);
> -static DECLARE_FAULT_ATTR(fault_io_failures_attr);
> +static DECLARE_FAULT_ATTR(fault_write_failure_attr);
> +static DECLARE_FAULT_ATTR(fault_erase_failure_attr);
>   static DECLARE_FAULT_ATTR(fault_power_cut_attr);
>   
>   #define FAIL_ACTION(name, fault_attr)			\
> @@ -24,7 +25,8 @@ bool should_fail_##name(void)				\
>   }
>   
>   FAIL_ACTION(bitflips,		fault_bitflips_attr)
> -FAIL_ACTION(io_failures,	fault_io_failures_attr)
> +FAIL_ACTION(write_failure,	fault_write_failure_attr)
> +FAIL_ACTION(erase_failure,	fault_erase_failure_attr)
>   FAIL_ACTION(power_cut,		fault_power_cut_attr)
>   #endif
>   
> @@ -245,8 +247,11 @@ static void dfs_create_fault_entry(struct dentry *parent)
>   	fault_create_debugfs_attr("emulate_bitflips", dir,
>   				  &fault_bitflips_attr);
>   
> -	fault_create_debugfs_attr("emulate_io_failures", dir,
> -				  &fault_io_failures_attr);
> +	fault_create_debugfs_attr("emulate_write_failure", dir,
> +				  &fault_write_failure_attr);
> +
> +	fault_create_debugfs_attr("emulate_erase_failure", dir,
> +				  &fault_erase_failure_attr);
>   
>   	fault_create_debugfs_attr("emulate_power_cut", dir,
>   				  &fault_power_cut_attr);
> diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h
> index fc4234c9a90a..6bc698b38e35 100644
> --- a/drivers/mtd/ubi/debug.h
> +++ b/drivers/mtd/ubi/debug.h
> @@ -92,10 +92,12 @@ static inline int ubi_dbg_erase_failure(const struct ubi_device *ubi)
>   /* Emulate bit-flips */
>   #define MASK_BITFLIPS		(1 << 3)
>   /* Emulates -EIO during write/erase */
> -#define MASK_IO_FAILURE		(1 << 4)
> +#define MASK_WRITE_FAILURE	(1 << 4)
> +#define MASK_ERASE_FAILURE	(1 << 5)
>   
>   extern bool should_fail_bitflips(void);
> -extern bool should_fail_io_failures(void);
> +extern bool should_fail_write_failure(void);
> +extern bool should_fail_erase_failure(void);
>   extern bool should_fail_power_cut(void);
>   
>   static inline bool ubi_dbg_fail_bitflip(const struct ubi_device *ubi)
> @@ -107,15 +109,15 @@ static inline bool ubi_dbg_fail_bitflip(const struct ubi_device *ubi)
>   
>   static inline bool ubi_dbg_fail_write(const struct ubi_device *ubi)
>   {
> -	if (ubi->dbg.emulate_failures & MASK_IO_FAILURE)
> -		return should_fail_io_failures();
> +	if (ubi->dbg.emulate_failures & MASK_WRITE_FAILURE)
> +		return should_fail_write_failure();
>   	return false;
>   }
>   
>   static inline bool ubi_dbg_fail_erase(const struct ubi_device *ubi)
>   {
> -	if (ubi->dbg.emulate_failures & MASK_IO_FAILURE)
> -		return should_fail_io_failures();
> +	if (ubi->dbg.emulate_failures & MASK_ERASE_FAILURE)
> +		return should_fail_erase_failure();
>   	return false;
>   }
>   
> 

Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>