Re: Kernel Bug after corrupted filesystem

[dennis-peiler-hi6Y0CQ0nG0@public.gmane.org]

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> 
> Thanks.
> Well, could you try to get some information with a debug build module?
> 
> First, pull the latest code from our git repository.
> 
> The debug build module can be built by commenting out the following
> line of the fs/Makefile.
> 
>    #CONFIG_NILFS_DEBUG=y
> 
> Then, set debug levels before mounting as follows:
> 
>   # modprobe nilfs2
>   # echo "-vvv fs -vvv recovery -vvv mdt -vvv btnode -vv dat" >
> /proc/fs/nilfs2/debug_option
>   # mount -t nilfs2 /dev/xxx /test
> 
> This will log some more information in syslog including
> block addresses.
> What I'd like to see next is content of key disk blocks, but first
> we need to know rough situation.
> 
Hi and happy new year,
ok have done that and atached the log hope this information is usefull and I hope this helps to further improve nilfs

Robinx99

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[ 1403.410728] NILFS nilfs_fill_super: start(silent=0)
[ 1403.410743] NILFS init_nilfs: called
[ 1403.410797] NILFS init_nilfs: loading super block
[ 1403.522848] NILFS init_nilfs: checking magic number
[ 1403.523456] NILFS init_nilfs: storing disk layout
[ 1403.523469] NILFS init_nilfs: done (err=0)
[ 1403.523985] NILFS(recovery) nilfs_search_super_root: looking segment (seg_start=24576, seg_end=26623, segnum=12, seg_seq=51994)
[ 1403.523997] NILFS(recovery) load_segment_summary: checking segment (pseg_start=24576, full_check=1)
[ 1403.550875] NILFS(recovery) load_segment_summary: done (ret=0)
[ 1403.550890] NILFS(recovery) load_segment_summary: checking segment (pseg_start=24578, full_check=1)
[ 1403.553235] NILFS(recovery) load_segment_summary: done (ret=3)
[ 1403.553246] NILFS(recovery) nilfs_search_super_root: strayed: scan_newer=1, ret=3
[ 1403.553253] NILFS(recovery) nilfs_search_super_root: looking segment (seg_start=28672, seg_end=30719, segnum=14, seg_seq=51995)
[ 1403.553260] NILFS(recovery) load_segment_summary: checking segment (pseg_start=28672, full_check=1)
[ 1403.574651] NILFS(recovery) load_segment_summary: done (ret=4)
[ 1403.574663] NILFS(recovery) nilfs_search_super_root: strayed: scan_newer=1, ret=4
[ 1403.574670] NILFS(recovery) nilfs_search_super_root: found super root: segnum=12, seq=51994, pseg_start=24576, pseg_offset=2
[ 1403.574677] NILFS nilfs_load_super_root: called (sr_block=24577)
[ 1403.576256] NILFS nilfs_load_super_root: done (err=0)
[ 1403.576637] NILFS(mdt) nilfs_mdt_read_block: called (ino=4, blkoff=0)
[ 1403.577506] NILFS(btnode) nilfs_btnode_submit_block: called: blocknr=667027 pblocknr=0 new=0 ino=4
[ 1403.577961] NILFS(dat) nilfs_dat_translate: called (vblocknr=667027)
[ 1403.577971] NILFS(mdt) nilfs_mdt_read_block: called (ino=3, blkoff=5233)
[ 1403.578669] NILFS(btnode) nilfs_btnode_submit_block: called: blocknr=26323 pblocknr=0 new=0 ino=3
[ 1403.579104] NILFS(btnode) nilfs_btnode_submit_block: done (err=0)
[ 1403.611958] Pid: 9129, comm: mount.nilfs2 Tainted: P          2.6.27-11-generic #1
[ 1403.611968] 
[ 1403.611970] Call Trace:
[ 1403.612003]  [<ffffffffa0f92d59>] nilfs_btree_do_lookup+0x219/0x240 [nilfs2]
[ 1403.612027]  [<ffffffffa0f92dee>] nilfs_btree_lookup+0x6e/0xb0 [nilfs2]
[ 1403.612050]  [<ffffffffa0f924e9>] nilfs_bmap_lookup_at_level+0x49/0xa0 [nilfs2]
[ 1403.612073]  [<ffffffffa0f9255f>] nilfs_bmap_lookup+0x1f/0x40 [nilfs2]
[ 1403.612094]  [<ffffffffa0f902c6>] nilfs_mdt_submit_block+0xe6/0x1e0 [nilfs2]
[ 1403.612117]  [<ffffffffa0f903fe>] nilfs_mdt_read_block+0x3e/0x280 [nilfs2]
[ 1403.612138]  [<ffffffffa0f9077b>] nilfs_mdt_get_block+0x6b/0x360 [nilfs2]
[ 1403.612149]  [<ffffffff80313859>] ? set_bh_page+0x9/0x50
[ 1403.612159]  [<ffffffff8050367e>] ? _spin_lock+0xe/0x20
[ 1403.612185]  [<ffffffffa0fa4972>] nilfs_palloc_get_entry_block+0x62/0x70 [nilfs2]
[ 1403.612209]  [<ffffffffa0f96ccb>] nilfs_dat_translate+0x3b/0x170 [nilfs2]
[ 1403.612231]  [<ffffffffa0f90fb9>] nilfs_btnode_submit_block+0x179/0x2f0 [nilfs2]
[ 1403.612252]  [<ffffffffa0f91144>] nilfs_btnode_get+0x14/0x80 [nilfs2]
[ 1403.612274]  [<ffffffffa0f921ad>] nilfs_bmap_get_block+0x1d/0x20 [nilfs2]
[ 1403.612296]  [<ffffffffa0f92c76>] nilfs_btree_do_lookup+0x136/0x240 [nilfs2]
[ 1403.612318]  [<ffffffffa0f92dee>] nilfs_btree_lookup+0x6e/0xb0 [nilfs2]
[ 1403.612339]  [<ffffffffa0f924e9>] nilfs_bmap_lookup_at_level+0x49/0xa0 [nilfs2]
[ 1403.612361]  [<ffffffffa0f9255f>] nilfs_bmap_lookup+0x1f/0x40 [nilfs2]
[ 1403.612382]  [<ffffffffa0f902c6>] nilfs_mdt_submit_block+0xe6/0x1e0 [nilfs2]
[ 1403.612403]  [<ffffffffa0f903fe>] nilfs_mdt_read_block+0x3e/0x280 [nilfs2]
[ 1403.612424]  [<ffffffffa0f9077b>] nilfs_mdt_get_block+0x6b/0x360 [nilfs2]
[ 1403.612432]  [<ffffffff80503576>] ? _spin_lock_irq+0x16/0x20
[ 1403.612439]  [<ffffffff80503384>] ? __down_write_nested+0xc4/0xd0
[ 1403.612465]  [<ffffffffa0fa1bd8>] nilfs_cpfile_get_checkpoint+0x68/0x210 [nilfs2]
[ 1403.612487]  [<ffffffffa0f8f9f9>] ? nilfs_mdt_set_entry_size+0x9/0x40 [nilfs2]
[ 1403.612508]  [<ffffffffa0f8ca68>] nilfs_attach_checkpoint+0xc8/0x200 [nilfs2]
[ 1403.612528]  [<ffffffffa0f8d844>] nilfs_get_sb+0x454/0x740 [nilfs2]
[ 1403.612568]  [<ffffffff802bbb0b>] ? kstrdup+0x5b/0x80
[ 1403.612576]  [<ffffffff802d5c0d>] ? alloc_pages_current+0xad/0x110
[ 1403.612588]  [<ffffffff802ec4f1>] vfs_kern_mount+0x81/0x180
[ 1403.612598]  [<ffffffff802ec663>] do_kern_mount+0x53/0x110
[ 1403.612606]  [<ffffffff803080bc>] do_new_mount+0x9c/0xd0
[ 1403.612612]  [<ffffffff80308765>] do_mount+0x245/0x270
[ 1403.612619]  [<ffffffff802d5c0d>] ? alloc_pages_current+0xad/0x110
[ 1403.612627]  [<ffffffff802b126d>] ? __get_free_pages+0x1d/0x50
[ 1403.612633]  [<ffffffff80308850>] sys_mount+0xc0/0xf0
[ 1403.612642]  [<ffffffff8021285a>] system_call_fastpath+0x16/0x1b
[ 1403.612647] 
[ 1403.612650] NILFS: btree level mismatch: 64 != 2
[ 1403.612662] NILFS(mdt) nilfs_mdt_submit_block: lookup: blkoff=5233 -> blocknr=5233 (ret=-5, ino=3)
[ 1403.612670] NILFS(mdt) nilfs_mdt_read_block: failed (err=-5)
[ 1403.612675] NILFS(dat) nilfs_dat_translate: failed (ret=-5)
[ 1403.612680] NILFS(btnode) nilfs_btnode_submit_block: return -5 (xlate).
[ 1403.612685] NILFS(btnode) nilfs_btnode_submit_block: done (err=-5)
[ 1403.612692] NILFS(mdt) nilfs_mdt_submit_block: lookup: blkoff=0 -> blocknr=0 (ret=-5, ino=4)
[ 1403.612698] NILFS(mdt) nilfs_mdt_read_block: failed (err=-5)
[ 1403.612704] NILFS nilfs_attach_checkpoint: failed to attach ifile (checkpoint number=112612, err=-5)
[ 1403.612711] NILFS(mdt) nilfs_mdt_destroy: called (ino=6)
[ 1403.612720] NILFS(mdt) nilfs_mdt_destroy: done
[ 1403.613246] NILFS: error loading a checkpoint (checkpoint number=112612).
[ 1403.613254] NILFS nilfs_fill_super: aborted
[ 1403.613259] NILFS(mdt) nilfs_mdt_clear: called (ino=5)
[ 1403.613265] NILFS(mdt) nilfs_mdt_clear: called truncate_inode_pages()
[ 1403.613271] NILFS(mdt) nilfs_mdt_clear: called nilfs_bmap_clear()
[ 1403.613277] NILFS(mdt) nilfs_mdt_clear: done (ino=5)
[ 1403.613281] NILFS(mdt) nilfs_mdt_destroy: called (ino=5)
[ 1403.613286] NILFS(mdt) nilfs_mdt_destroy: done
[ 1403.613289] NILFS(mdt) nilfs_mdt_clear: called (ino=4)
[ 1403.613308] NILFS(mdt) nilfs_mdt_clear: called truncate_inode_pages()
[ 1403.613314] NILFS(mdt) nilfs_mdt_clear: called nilfs_bmap_clear()
[ 1403.613327] NILFS(mdt) nilfs_mdt_clear: done (ino=4)
[ 1403.613331] NILFS(mdt) nilfs_mdt_destroy: called (ino=4)
[ 1403.613336] NILFS(mdt) nilfs_mdt_destroy: done
[ 1403.613340] NILFS(mdt) nilfs_mdt_clear: called (ino=3)
[ 1403.613350] NILFS(mdt) nilfs_mdt_clear: called truncate_inode_pages()
[ 1403.613355] NILFS(mdt) nilfs_mdt_clear: called nilfs_bmap_clear()
[ 1403.613365] NILFS(mdt) nilfs_mdt_clear: done (ino=3)
[ 1403.613369] NILFS(mdt) nilfs_mdt_destroy: called (ino=3)
[ 1403.613375] NILFS(mdt) nilfs_mdt_destroy: done
[ 1403.613379] NILFS(mdt) nilfs_mdt_destroy: called (ino=3)
[ 1403.613385] NILFS(mdt) nilfs_mdt_destroy: done
[ 1403.613393] NILFS put_nilfs: the_nilfs on bdev loop1 was freed

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