UBIFS在ubiattach或者ubimkvol或ubiupdatevol时随机报错

本帖最后由 kenzhang1031 于 2018-7-4 11:43 编辑

HI3531D系统，linux内核3.18.20
rootfs在spi nor flash的mtd3分区中，rootfs启动之后，想把spi nand的其中一个分区/dev/mtd5挂载为ubifs。
spi nand分区mtd5为150MB，规格为：4kB页大小，ecc 24bit/1024。

以下几步：
1. flash_erase /dev/mtd5 0 0        # 擦除成功
2. ubiattach /dev/ubi_ctrl -m 5 -d 1  
3. ubimkvol /dev/ubi1 -N rescue -m
4. ubiupdatevol /dev/ubi1_0 rescue.ubiimg

其中2，3，4步之一可能会偶尔报错。报错之后重新执行就会正确。比如：ubiattach报如下错误，这个时候只要再ubidetach -m 5之后，再执行ubiattach就会正确。通常reboot之后，第一次执行报错几率比较大，之后重新执行不出错。不清楚问题出在哪里？（请勿在意坏区超过了40这个警告，之前没坏区的时候一样有同样的错误，不是坏区超过了40引起的）
[code]UBI: attaching mtd5 to ubi1
UBI: scanning is finished
UBI warning: ubi_calculate_reserved: number of bad PEBs (58) is above the expected limit (40), not reserving any PEBs for bad PEB handling, will use available PEBs (if any)
UBI: attached mtd5 (name "rescue", size 150 MiB) to ubi1
UBI: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
UBI: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
UBI: VID header offset: 4096 (aligned 4096), data offset: 8192
UBI: good PEBs: 542, bad PEBs: 58, corrupted PEBs: 0
UBI: user volume: 0, internal volumes: 1, max. volumes count: 128
UBI: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 1243604547
UBI: available PEBs: 538, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0
UBI: background thread "ubi_bgt1d" started, PID 215
UBIFS error (pid 220): ubifs_read_node: bad node type (255 but expected 1)
UBIFS error (pid 220): ubifs_read_node: bad node at LEB 281:36632, LEB mapping status 1
Not a node, first 24 bytes:
00000000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff                          ........................
CPU: 0 PID: 220 Comm: ubimkvol Tainted: G           O   3.18.20 #26
[<80016664>] (unwind_backtrace) from [<80012024>] (show_stack+0x10/0x14)
[<80012024>] (show_stack) from [<804a8794>] (dump_stack+0x88/0x98)
[<804a8794>] (dump_stack) from [<801d6784>] (ubifs_read_node+0x260/0x2d8)
[<801d6784>] (ubifs_read_node) from [<801f2e60>] (ubifs_tnc_read_node+0x120/0x12c)
[<801f2e60>] (ubifs_tnc_read_node) from [<801d9d0c>] (ubifs_tnc_locate+0x1fc/0x224)
[<801d9d0c>] (ubifs_tnc_locate) from [<801cc97c>] (do_readpage+0x128/0x3b0)
[<801cc97c>] (do_readpage) from [<801cda30>] (ubifs_readpage+0x38/0x4b0)
[<801cda30>] (ubifs_readpage) from [<80089c74>] (filemap_fault+0x2a0/0x474)
[<80089c74>] (filemap_fault) from [<800a66c8>] (__do_fault+0x34/0x88)
[<800a66c8>] (__do_fault) from [<800a8d24>] (do_read_fault+0x1e4/0x2c4)
[<800a8d24>] (do_read_fault) from [<800a95b8>] (handle_mm_fault+0x438/0xd14)
[<800a95b8>] (handle_mm_fault) from [<800184b8>] (do_page_fault+0x1e0/0x290)
[<800184b8>] (do_page_fault) from [<80008548>] (do_PrefetchAbort+0x34/0x98)
[<80008548>] (do_PrefetchAbort) from [<80012f5c>] (ret_from_exception+0x0/0x24)
Exception stack(0xbe9e5fb0 to 0xbe9e5ff8)
5fa0:                                     0007b0bb 0007b0ba 00000001 0007b0bc
5fc0: 0008b21c 000a2090 7ecaeb38 00000000 00000002 0007b0b8 0007b0b8 7ecaeb5c
5fe0: 00000020 7ecae640 000428c0 000461ac 80000010 ffffffff
UBIFS error (pid 220): do_readpage: cannot read page 54 of inode 650, error -22
UBIFS error (pid 228): ubifs_read_node: bad node length 1837, expected 2730
UBIFS error (pid 228): ubifs_read_node: bad node at LEB 262:39120, LEB mapping status 1
[/code]