[U-Boot] U-boot UBI environment
Kevin Smith
kevin.smith at elecsyscorp.com
Wed May 11 17:54:57 CEST 2016
Hi Joe and Heiko,
I tried disabling the fastmap options, and it appears to be related to
these. With fastmap off, I am able two write without corrupting the
other volume. It looks like it may specifically be the autoupdate
feature, but I am still testing to be sure this is the case. I will let
you know.
Thank you for your help,
Kevin
On 05/11/2016 12:51 AM, Heiko Schocher wrote:
> Hello Joe,
>
> Am 11.05.2016 um 01:15 schrieb Joseph Hershberger:
>> Hi Kevin,
>>
>> Am 09.05.2016 um 23:16 schrieb Kevin Smith:
>>> Hello,
>>>
>>> I would appreciate some UBI help/advice if you are able to provide it.
>>> I am trying to use UBI to store my u-boot environment, but when I try
>>> to 'saveenv', it is corrupting another volume of my UBI. I can image
>>> the rootfs volume and boot Linux from it without a problem. However,
>>> the first time that I save the u-boot environment, the rootfs becomes
>>> unreadable. When the rootfs is corrupted, I have booted Linux from
>>> another source and tried to attach UBI and dd out the data. It
>>> appears as all 0xFF. Both u-boot and Linux can read the env volume
>>> correctly.
>>>
>>> I do not think that there is a board in U-boot that uses UBI env, so I
>>> do not have anything to compare to. I have included some details of
>>> my setup below. Do you have any suggestion about what might be wrong?
>>> I saw the recent patch b1d6590d35, and thought it might fix it, but am
>>> still having the problem even with this. Maybe there is another bug?
>>> I am glad to provide more info as needed.
>>> Thank you,
>>> Kevin
>>>
>>> DTS:
>>> flash at d0000 {
>>> num-cs = <1>;
>>> marvell,nand-keep-config;
>>> marvell,nand-enable-arbiter;
>>> nand-on-flash-bbt;
>>> nand-ecc-strength = <4>;
>>> nand-ecc-step-size = <512>;
>>> status = "okay";
>>>
>>> partition at 0 {
>>> label = "mvboot";
>>> reg = <0 0x200000>;
>>> };
>>> partition at 200000 {
>>> label = "ubi";
>>> reg = <0x200000 0x1fe00000>;
>>> };
>>> };
>>> Config:
>>> #define MTDIDS_DEFAULT "nand0=pxa3xx_nand-0"
>>> #define MTDPARTS_DEFAULT "mtdparts=pxa3xx_nand-0:2m(mvboot),-(ubi)"
>>> #define CONFIG_CMD_UBI
>>> #define CONFIG_CMD_UBIFS
>>
>>> #define CONFIG_MTD_UBI_FASTMAP
>>> #define CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT 1
>>
>> I don’t define these 2, not sure if it matters.
>
> This should be no problem ... but you (Kevin) may disable
> FASTMAP for a test?
>
>>> #define CONFIG_ENV_IS_IN_UBI
>>> #define CONFIG_ENV_UBI_PART "ubi"
>>> #define CONFIG_ENV_UBI_VOLUME "u-boot-env"
>>> #define CONFIG_ENV_SIZE (64 * 1024)
>>
>> My config looks like this:
>>
>> #define MTDIDS_DEFAULT "nand0=xilinx_nand"
>> #define MTDPARTS_DEFAULT \
>> "mtdparts=xilinx_nand:" \
>> "128k(fsbl)ro," \
>> "11M(u-boot)ro," \
>> "70M(boot-config)," \
>> "-(root)"
>
> You have 70MB for Env?
>
>> #define CONFIG_ENV_IS_IN_UBI
>> #define CONFIG_ENV_UBI_PART "boot-config"
>> #define CONFIG_ENV_UBI_VOLUME "u-boot-env1"
>> #define CONFIG_ENV_UBI_VOLUME_REDUND "u-boot-env2"
>> #define CONFIG_ENV_SIZE 0x20000
>>
>> I create volumes like this:
>>
>> "writepartitions=" \
>> "if ubi part boot-config && " \
>> "ubi read $verifyaddr u-boot-env1 1 && " \
>> "ubi read $verifyaddr u-boot-env2 1; " \
>> "then " \
>> "ubi remove bootfs && " \
>> "ubi remove config; " \
>> "else " \
>> "nand erase.part boot-config && " \
>> "ubi part boot-config && " \
>> "ubi create u-boot-env1 " __stringify(CONFIG_ENV_SIZE) "
>> dynamic && " \
>> "ubi create u-boot-env2 " __stringify(CONFIG_ENV_SIZE) "
>> dynamic; " \
>> "fi && " \
>> "ubi create bootfs " __stringify(CONFIG_BOOTFS_VOLUME_SIZE) "
>> dynamic && " \
>> "ubi create config - dynamic && " \
>> "if ubi part root && " \
>> "ubi read $verifyaddr rootfs 1; " \
>> "then " \
>> "ubi remove rootfs; " \
>> "else " \
>> "nand erase.part root && " \
>> "ubi part root; " \
>> "fi && " \
>> "ubi create rootfs - dynamic;\0" \
>>
>>
>>> => ubi info
>>> UBI: MTD device name: "mtd=1"
>>> UBI: MTD device size: 510 MiB
>>> UBI: physical eraseblock size: 131072 bytes (128 KiB)
>>> UBI: logical eraseblock size: 126976 bytes
>>> UBI: number of good PEBs: 4072
>>> UBI: number of bad PEBs: 8
>>> UBI: smallest flash I/O unit: 2048
>>> UBI: VID header offset: 2048 (aligned 2048)
>>> UBI: data offset: 4096
>>> UBI: max. allowed volumes: 128
>>> UBI: wear-leveling threshold: 4096
>>> UBI: number of internal volumes: 1
>>> UBI: number of user volumes: 2
>>> UBI: available PEBs: 0
>>> UBI: total number of reserved PEBs: 4072
>>> UBI: number of PEBs reserved for bad PEB handling: 72
>>> UBI: max/mean erase counter: 18/4
>>>
>>> => ubi info l
>>> Volume information dump:
>>> vol_id 0
>>> reserved_pebs 1
>>> alignment 1
>>> data_pad 0
>>> vol_type 3
>>> name_len 10
>>> usable_leb_size 126976
>>> used_ebs 1
>>> used_bytes 126976
>>> last_eb_bytes 126976
>>> corrupted 0
>>> upd_marker 0
>>> name u-boot-env
>
> @Kevin: you have exactly one PEB for this volume ... may this is the
> problem?
> Can you try it with a Volume, which have more space?
>
>>> Volume information dump:
>>> vol_id 1
>>> reserved_pebs 3993
>>> alignment 1
>>> data_pad 0
>>> vol_type 3
>>> name_len 6
>>> usable_leb_size 126976
>>> used_ebs 3993
>>> used_bytes 507015168
>>> last_eb_bytes 126976
>>> corrupted 0
>>> upd_marker 0
>>> name rootfs
>>> Volume information dump:
>>> vol_id 2147479551
>>> reserved_pebs 2
>>> alignment 1
>>> data_pad 0
>>> vol_type 3
>>> name_len 13
>>> usable_leb_size 126976
>>> used_ebs 2
>>> used_bytes 253952
>>> last_eb_bytes 2
>>> corrupted 0
>>> upd_marker 0
>>> name layout volume
>>>
>>> => ubifsmount ubi0:rootfs
>>> Error reading superblock on volume 'ubi0:rootfs' errno=-30!
>>> ubifsmount - mount UBIFS volume
>>>
>>> Usage:
>>> ubifsmount <volume-name>
>>> - mount 'volume-name' volume
>>>
>>
>> I also notice that you are not using a redundant env like I am, so
>> maybe there is a bug when not using a redundant env that I don't run
>> into.
>
> I don;t know.
>
> bye,
> Heiko
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