[linux-driver] 挂载jffs2文件系统后文件目录丢失
史骏
大家好,宋老师好:
我现在在内核为linux 2.6.28的powerpc MPC8541E 的开发板上制作的JFFS2文件系统后，发现重启开发板，再挂载JFFS2分区的时候，会有出错信息：
即在卸载后重新挂载会有出错信息，挂载可以完成，奇数大小的文件会在尾部丢失一部分，偶数大小的文件正常；奇数名的目录直接丢失，无法显示，偶数名大小的文件一切正常。文件系统是采用ramdisk作为根文件系统，启动后挂载JFFS2作为一个分区。
我们公司采用的flash是spansion公司的S29GL01GP(nor-flash 1Gbit)芯片（flash是16位读写操作），linux下flash读写文件正常，在制作完成文件系统后，拷贝文件都正常，采用的是写buffer 模式。
Jffs2 文件系统卸载后，重新挂载出现如下问题，错误信息如下所示。
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006074d8: 0x00ff instead
jffs2_scan_dirent_node(): Name CRC failed on node at 0x00607520: Read 0xb49ea009, calculated 0xc9993eb8
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00607550: 0x1085 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00607558: 0xa4ef instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00607590: 0xe618 instead
jffs2_scan_dirent_node(): Name CRC failed on node at 0x006075f4: Read 0xb49ea009, calculated 0xc9993eb8
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00607624: 0x1085 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0060762c: 0xa4ef instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00607664: 0x3a18 instead
jffs2_scan_dirent_node(): Name CRC failed on node at 0x00607668: Read 0xb49ea009, calculated 0xc9993eb8
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00607698: 0x1085 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006076a0: 0xee2d instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x006076d4: 0xd651 instead
Further such events for this erase block will not be printed
jffs2_scan_dirent_node(): Name CRC failed on node at 0x0060a81c: Read 0xb49ea009, calculated 0xc9993eb8
JFFS2 notice: (1142) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of x.
JFFS2 notice: (1143) check_node_data: wrong data CRC in data node at 0x009de9e0: read 0xb4c9537d, calculated 0x791e55ee.
JFFS2 notice: (1143) check_node_data: wrong data CRC in data node at 0x00606b0c: read 0x75b4c975, calculated 0x58b626f8.
JFFS2 notice: (1143) check_node_data: wrong data CRC in data node at 0x00609790: read
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W/filemap ( 5490): *************file:/system/framework/framework-res.apk ,MAP: base 0x4236a000/4299 data 0x4236afac/287*************
W/filemap ( 5490): *************file:/system/app/PackageInstaller.apk ,MAP: base 0x4236a000/3647 data 0x4236ab31/782*************
W/filemap ( 5490): *************file:/data/app/vStudio.Android.GPhoto.apk ,MAP: base 0x44ad3000/1550930 data 0x44ad3000/1550930*************
W/filemap ( 5490): *************file:/data/app/vStudio.Android.GPhoto.apk ,MAP: base 0x4236a000/46472 data 0x4236a908/44160*************
W/filemap ( 5490): *************file:/data/app/vStudio.Android.GPhoto.apk ,MAP: base 0x42376000/9754 data 0x4237625c/9150*************
W/filemap ( 4378): *************file:/system/app/Music.apk ,MAP: base 0x42403000/1396 data 0x42403436/318*************
I/DEBUG ( 4372): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG ( 4372): Build fingerprint: 'FOXDA/cs8901/cs8901/:1.5/SW:1.0.1.0/HW:4.0:eng/test-keys'
I/DEBUG ( 4372): pid: 4378, tid: 4395 >>> system_server <<<
I/DEBUG ( 4372): signal 7 (SIGBUS), fault addr 42403436
I/DEBUG ( 4372): r0 00000000 r1 42403436 r2 42403436 r3 0000000c
I/DEBUG ( 4372): r4 a9d37a54 r5 af913158 r6 00000000 r7 45401d18
I/DEBUG ( 4372): r8 45401da0 r9 00000000 10 00311d50 fp 0000013d
I/DEBUG ( 4372): ip 0000000c sp 45401c98 lr 00000000 pc af90b580 cpsr 20000010
I/ActivityManager( 4378): Displayed activity com.android.packageinstaller/.InstallAppDone: 848 ms
I/DEBUG ( 4372): #00 pc 0000b580 /system/lib/libz.so
I/DEBUG ( 4372): #01 pc 000298c2 /system/lib/libutils.so
I/DEBUG ( 4372): #02 pc 0001d38e /system/lib/libutils.so
I/DEBUG ( 4372): #03 pc 000371ee /system/lib/libandroid_runtime.so
I/DEBUG ( 4372): #04 pc 0000e3b4 /system/lib/libdvm.so
I/DEBUG ( 4372): #05 pc 00040a8a /system/lib/libdvm.so
I/DEBUG ( 4372): #06 pc 00013118 /system/lib/libdvm.so
I/DEBUG ( 4372): #07 pc 00017b1c /system/lib/libdvm.so
I/DEBUG ( 4372): #08 pc 00017560 /system/lib/libdvm.so
I/DEBUG ( 4372): #09 pc 00051fc4 /system/lib/libdvm.so
I/DEBUG ( 4372): #10 pc 00051fe2 /system/lib/libdvm.so
I/DEBUG ( 4372): #11 pc 00047148 /system/lib/libdvm.so
I/DEBUG ( 4372): #12 pc 0000f880 /system/lib/libc.so
I/DEBUG ( 4372): #13 pc 0000f3f4 /system/lib/libc.so
I/DEBUG ( 4372): stack:
I/DEBUG ( 4372): 45401c58 45401da0
I/DEBUG ( 4372): 45401c5c afe0af93 /system/lib/libc.so
I/DEBUG ( 4372): 45401c60 000000dc
I/DEBUG ( 4372): 45401c64 00002bb0
I/DEBUG ( 4372): 45401c68 afe3c980
I/DEBUG ( 4372): 45401c6c afe39dd0
I/DEBUG ( 4372): 45401c70 0000a000 [heap]
I/DEBUG ( 4372): 45401c74 00000030
I/DEBUG ( 4372): 45401c78 41044d24
I/DEBUG ( 4372): 45401c7c 00274728 [heap]
I/DEBUG ( 4372): 45401c80 00000030
I/DEBUG ( 4372): 45401c84 00000033
I/DEBUG ( 4372): 45401c88 000000dc
I/DEBUG ( 4372): 45401c8c afe0bc5f /system/lib/libc.so
I/DEBUG ( 4372): 45401c90 df002777
I/DEBUG ( 4372): 45401c94 e3a070ad
I/DEBUG ( 4372): #00 45401c98 afe3c980
I/DEBUG ( 4372): 45401c9c 00000030
I/DEBUG ( 4372): 45401ca0 00002530
I/DEBUG ( 4372): 45401ca4 afe0e940 /system/lib/libc.so
I/DEBUG ( 4372): 45401ca8 00000004
I/DEBUG ( 4372): 45401cac afe0ecd4 /system/lib/libc.so
I/DEBUG ( 4372): 45401cb0 42403436
I/DEBUG ( 4372): 45401cb4 002db740 [heap]
I/DEBUG ( 4372): 45401cb8 000002ac
I/DEBUG ( 4372): 45401cbc 000002ac
I/DEBUG ( 4372): 45401cc0 00000000
I/DEBUG ( 4372): 45401cc4 afe0b663 /system/lib/libc.so
I/DEBUG ( 4372): 45401cc8 afe39dd0
I/DEBUG ( 4372): 45401ccc 0000013e
I/DEBUG ( 4372): 45401cd0 afe3c980
I/DEBUG ( 4372): 45401cd4 fffffff1
I/DEBUG ( 4372): 45401cd8 45401d18
I/DEBUG ( 4372): 45401cdc a9d37a54 /system/lib/libutils.so
I/DEBUG ( 4372): 45401ce0 42403436
I/DEBUG ( 4372): 45401ce4 000002ac
I/DEBUG ( 4372): 45401ce8 a9d46b88
I/DEBUG ( 4372): 45401cec 45401da0
I/DEBUG ( 4372): 45401cf0 41044d24
I/DEBUG ( 4372): 45401cf4 41044d10
I/DEBUG ( 4372): 45401cf8 00000001
I/DEBUG ( 4372): 45401cfc a9d298c5 /system/lib/libutils.so
I/DEBUG ( 4372): #01 45401d00 00002bb0
I/DEBUG ( 4372): 45401d04 00000003
I/DEBUG ( 4372): 45401d08 000000da
I/DEBUG ( 4372): 45401d0c 000001b8
I/DEBUG ( 4372): 45401d10 45401d18
I/DEBUG ( 4372): 45401d14 002db740 [heap]
I/DEBUG ( 4372): 45401d18 42403436
I/DEBUG ( 4372): 45401d1c 0000013e
I/DEBUG ( 4372): 45401d20 00000000
I/DEBUG ( 4372): 45401d24 002db740 [heap]
I/DEBUG ( 4372): 45401d28 000002ac
I/DEBUG ( 4372): 45401d2c 00000000
I/DEBUG ( 4372): 45401d30 00000000
I/DEBUG ( 4372): 45401d34 00311d50 [heap]
I/DEBUG ( 4372): 45401d38 af90a6f0 /system/lib/libz.so
I/DEBUG ( 4372): 45401d3c af90a6e8 /system/lib/libz.so
I/DEBUG ( 4372): 45401d40 00000000
I/DEBUG ( 4372): 45401d44 00000002
I/DEBUG ( 4372): 45401d48 00000001
I/DEBUG ( 4372): 45401d4c 00000000
I/DEBUG ( 4372): 45401d50 a9d46b88
I/DEBUG ( 4372): 45401d54 00283a20 [heap]
I/DEBUG ( 4372): 45401d58 a9d46b88
I/DEBUG ( 4372): 45401d5c 002db740 [heap]
I/DEBUG ( 4372): 45401d60 00217f00 [heap]
I/DEBUG ( 4372): 45401d64 a9d1d393 /system/lib/libutils.so
I/InstallAppDone( 5490): Finished installing ApplicationInfo{437733d8 vStudio.Android.GPhoto}