Messages in this thread | | | Subject | Re: [PATCH V2 3/5] ubi: Add six fault injection type for testing | From | Zhihao Cheng <> | Date | Mon, 31 Jul 2023 20:21:03 +0800 |
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在 2023/7/18 16:51, ZhaoLong Wang 写道: > This commit adds six fault injection type for testing to cover the > abnormal path of the UBI driver. > > Inject the following faults when the UBI reads the LEB: > +----------------------------+-----------------------------------+ > | Interface name | emulate behavior | > +----------------------------+-----------------------------------+ > | emulate_eccerr | ECC error | > +----------------------------+-----------------------------------+ > | emulate_read_failure | read failure | > |----------------------------+-----------------------------------+ > | emulate_io_ff | read content as all FF | > |----------------------------+-----------------------------------+ > | emulate_io_ff_bitflips | content FF with MTD err reported | > +----------------------------+-----------------------------------+ > | emulate_bad_hdr | bad leb header | > |----------------------------+-----------------------------------+ > | emulate_bad_hdr_ebadmsg | bad header with ECC err | > +----------------------------+-----------------------------------+ > > Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com> > --- > drivers/mtd/ubi/debug.c | 30 +++++++++ > drivers/mtd/ubi/debug.h | 132 ++++++++++++++++++++++++++++++++++++++-- > drivers/mtd/ubi/io.c | 75 ++++++++++++++++++++++- > drivers/mtd/ubi/ubi.h | 31 ++++++---- > 4 files changed, 248 insertions(+), 20 deletions(-) > > diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c > index 7826bc8166e8..016a861c5029 100644 > --- a/drivers/mtd/ubi/debug.c > +++ b/drivers/mtd/ubi/debug.c > @@ -13,10 +13,16 @@ > #include <linux/fault-inject.h> > > #ifdef CONFIG_MTD_UBI_FAULT_INJECTION > +static DECLARE_FAULT_ATTR(fault_eccerr_attr); > static DECLARE_FAULT_ATTR(fault_bitflips_attr); > +static DECLARE_FAULT_ATTR(fault_read_failure_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); > +static DECLARE_FAULT_ATTR(fault_io_ff_attr); > +static DECLARE_FAULT_ATTR(fault_io_ff_bitflips_attr); > +static DECLARE_FAULT_ATTR(fault_bad_hdr_attr); > +static DECLARE_FAULT_ATTR(fault_bad_hdr_ebadmsg_attr); > > #define FAIL_ACTION(name, fault_attr) \ > bool should_fail_##name(void) \ > @@ -24,10 +30,16 @@ bool should_fail_##name(void) \ > return should_fail(&fault_attr, 1); \ > } > > +FAIL_ACTION(eccerr, fault_eccerr_attr) > FAIL_ACTION(bitflips, fault_bitflips_attr) > +FAIL_ACTION(read_failure, fault_read_failure_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) > +FAIL_ACTION(io_ff, fault_io_ff_attr) > +FAIL_ACTION(io_ff_bitflips, fault_io_ff_bitflips_attr) > +FAIL_ACTION(bad_hdr, fault_bad_hdr_attr) > +FAIL_ACTION(bad_hdr_ebadmsg, fault_bad_hdr_ebadmsg_attr) > #endif > > /** > @@ -244,6 +256,12 @@ static void dfs_create_fault_entry(struct dentry *parent) > return; > } > > + fault_create_debugfs_attr("emulate_eccerr", dir, > + &fault_eccerr_attr); > + > + fault_create_debugfs_attr("emulate_read_failure", dir, > + &fault_read_failure_attr); > + > fault_create_debugfs_attr("emulate_bitflips", dir, > &fault_bitflips_attr); > > @@ -255,6 +273,18 @@ static void dfs_create_fault_entry(struct dentry *parent) > > fault_create_debugfs_attr("emulate_power_cut", dir, > &fault_power_cut_attr); > + > + fault_create_debugfs_attr("emulate_io_ff", dir, > + &fault_io_ff_attr); > + > + fault_create_debugfs_attr("emulate_io_ff_bitflips", dir, > + &fault_io_ff_bitflips_attr); > + > + fault_create_debugfs_attr("emulate_bad_hdr", dir, > + &fault_bad_hdr_attr); > + > + fault_create_debugfs_attr("emulate_bad_hdr_ebadmsg", dir, > + &fault_bad_hdr_ebadmsg_attr); > } > #endif > > diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h > index 6bc698b38e35..29fbd971964a 100644 > --- a/drivers/mtd/ubi/debug.h > +++ b/drivers/mtd/ubi/debug.h > @@ -85,20 +85,47 @@ static inline int ubi_dbg_erase_failure(const struct ubi_device *ubi) > * precisely control the type and process of fault injection. > */ > /* Emulate a power cut when writing EC/VID header */ > -#define MASK_POWER_CUT_EC (1 << 1) > -#define MASK_POWER_CUT_VID (1 << 2) > +#define MASK_POWER_CUT_EC (1 << 0) > +#define MASK_POWER_CUT_VID (1 << 1) > > #ifdef CONFIG_MTD_UBI_FAULT_INJECTION > +/* Emulate a power cut when writing data*/ > +#define MASK_POWER_CUT_DATA (1 << 2) > /* Emulate bit-flips */ > -#define MASK_BITFLIPS (1 << 3) > -/* Emulates -EIO during write/erase */ > -#define MASK_WRITE_FAILURE (1 << 4) > -#define MASK_ERASE_FAILURE (1 << 5) > +#define MASK_BITFLIPS (1 << 3) > +/* Emulate ecc error */ > +#define MASK_ECCERR (1 << 4) > +/* Emulates -EIO during data read */ > +#define MASK_READ_FAILURE (1 << 5) > +#define MASK_READ_FAILURE_EC (1 << 6) > +#define MASK_READ_FAILURE_VID (1 << 7) > +/* Emulates -EIO during data write */ > +#define MASK_WRITE_FAILURE (1 << 8) > +/* Emulates -EIO during erase a PEB*/ > +#define MASK_ERASE_FAILURE (1 << 9) > +/* Return UBI_IO_FF when reading EC/VID header */ > +#define MASK_IO_FF_EC (1 << 10) > +#define MASK_IO_FF_VID (1 << 11) > +/* Return UBI_IO_FF_BITFLIPS when reading EC/VID header */ > +#define MASK_IO_FF_BITFLIPS_EC (1 << 12) > +#define MASK_IO_FF_BITFLIPS_VID (1 << 13) > +/* Return UBI_IO_BAD_HDR when reading EC/VID header */ > +#define MASK_BAD_HDR_EC (1 << 14) > +#define MASK_BAD_HDR_VID (1 << 15) > +/* Return UBI_IO_BAD_HDR_EBADMSG when reading EC/VID header */ > +#define MASK_BAD_HDR_EBADMSG_EC (1 << 16) > +#define MASK_BAD_HDR_EBADMSG_VID (1 << 17) >
Now, you add many types of fault injections, it's better to make dfs_file_read display human-readable context for 'd->emulate_failures', for example: value:17409 POWER_CUT_EC,MASK_IO_FF_EC,MASK_BAD_HDR_EC
value:0 None
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