Date:	Tue, 13 Nov 2012 09:19:14 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	George Spelvin <linux@...izon.com>
CC:	linux-ext4@...r.kernel.org
Subject: Re: e2fsck: eh_magic = 0000 != f30a

On 11/13/12 6:03 AM, George Spelvin wrote:
> Having just created and filled a 64bit file system, I ran e2fsck on it,
> and keep getting this message printed shortly after "Pass 1" is printed.

Just for posterity, can you say what parameters you used on mkfs,
as well as include the "dumpe2fs -h" output for the filesystem so we can
see features, geometry, etc?  Then it can probably be reproduced
and analyzed.

-Eric


> It doesn't seem to cause any obvious bad things.  Is it dangerous?
> 
> Adding some debugging prints to e2fsck, I discovered the error occurs
> with inode 7 (the reside inode) at line 869 of e2fsck/pass1.c.
> 
> 
> Also, the first fsck ever on the newly filled filesystem (which was run
> with -D) produced a 1-block error:
> 
> Pass 5: Checking group summary information                                     
> Block bitmap differences:  -1719140557                                         
> Fix<y>? yes
> Free blocks count wrong for group #52464 (32344, counted=32345).               
> Fix<y>? yes
> Free blocks count wrong (227072527, counted=227072528).
> Fix<y>? yes
> 
> The second (without -D) reversed it:
> # e2fsck -f -v -C0 /dev/md1
> e2fsck 1.43-WIP (22-Sep-2012)
> Pass 1: Checking inodes, blocks, and sizes
> eh_magic = 0000 != f30a
> Pass 2: Checking directory structure                                           
> Pass 3: Checking directory connectivity                                        
> Pass 4: Checking reference counts                                              
> Pass 5: Checking group summary information                                     
> Block bitmap differences:  +1719140557                                         
> Fix<y>? yes
> Free blocks count wrong for group #52464 (32345, counted=32344).               
> Fix<y>? yes
> Free blocks count wrong (227072528, counted=227072527).
> Fix<y>? yes
> 
> 
> Dumping some information:
> debugfs:  ex <7>
> <7>: does not uses extent block maps
> debugfs:  stat <7>
> Inode: 7   Type: regular    Mode:  0600   Flags: 0x0
> Generation: 0    Version: 0x00000000:00000000
> User:     0   Group:     0   Size: 4299210752
> File ACL: 0    Directory ACL: 0
> Links: 1   Blockcount: 188424
> Fragment:  Address: 0    Number: 0    Size: 0
>  ctime: 0x50a021ee:00000000 -- Sun Nov 11 17:08:46 2012
>  atime: 0x50a021ee:00000000 -- Sun Nov 11 17:08:46 2012
>  mtime: 0x50a021ee:00000000 -- Sun Nov 11 17:08:46 2012
> crtime: 0x50a021ee:00000000 -- Sun Nov 11 17:08:46 2012
> Size of extra inode fields: 28
> Inode checksum: 0xb1958b41
> BLOCKS:
> (DIND):2122, (IND):1025, (1036):33793, (1037):99329, (1038):164865, (1039):230401, (1040):295937, (1041):820225, (1042):885761, (1043):1606657, (1044):2655233, (1045):4097025, (1046):7963649, (1047):11240449, (1048):20481025, (1049):23888897, (1050):71664641, (1051):78676993, (1052):102401025, (1053):214991873, (1054):512001025, (1055):550732801, (1056):644973569, (1057):1934918657, (IND):1026, (2060):33794, (2061):99330, (2062):164866, (2063):230402, (2064):295938, (2065):820226, (2066):885762, (2067):1606658, (2068):2655234, (2069):4097026, (2070):7963650, (2071):11240450, (2072):20481026, (2073):23888898, (2074):71664642, (2075):78676994, (2076):102401026, (2077):214991874, (2078):512001026, (2079):550732802, (2080):644973570, (2081):1934918658, (IND):1027, (3084):33795, (3085):99331, (3086):164867, (3087):230403, (3088):295939, (3089):820227, (3090):885763, (3091):1606659, (3092):2655235, (3093):4097027, (3094):7963651, (3095):11240451, (3096):20481027, (3097):23888899!
 , !
>  (3098):71664643, (3099):78676995, (3100):102401027, (3101):214991875, (3102):512001027, (3103):550732803, (3104):644973571, (3105):1934918659, (IND):1028, (4108):33796, (4109):99332, (4110):164868, (4111):230404, (4112):295940, (4113):820228, (4114):885764, (4115):1606660, (4116):2655236, (4117):4097028, (4118):7963652, (4119):11240452, (4120):20481028, (4121):23888900, (4122):71664644, (4123):78676996, (4124):102401028, (4125):214991876, (4126):512001028, (4127):550732804, (4128):644973572, (4129):1934918660, (IND):1029, (5132):33797, (5133):99333, (5134):164869, (5135):230405, (5136):295941, (5137):820229, (5138):885765, (5139):1606661, (5140):2655237, (5141):4097029, (5142):7963653, (5143):11240453, (5144):20481029, (5145):23888901, (5146):71664645, (5147):78676997, (5148):102401029, (5149):214991877, (5150):512001029, (5151):550732805, (5152):644973573, (5153):1934918661, (IND):1030, (6156):33798, (6157):99334, (6158):164870, (6159):230406, (6160):295942, (6161):82023!
 0,!
>   (6162):885766, (6163):1606662, (6164):2655238, (6165):4097030!
>  , (6166):7963654, (6167):11240454, (6168):20481030, (6169):23888902, (6170):71664646, (6171):78676998, (6172):102401030, (6173):214991878, (6174):512001030, (6175):550732806, (6176):644973574, (6177):1934918662, (IND):1031, (7180):33799, (7181):99335, (7182):164871, (7183):230407, (7184):295943, (7185):820231, (7186):885767, (7187):1606663, (7188):2655239, (7189):4097031, (7190):7963655, (7191):11240455, (7192):20481031, (7193):23888903, (7194):71664647, (7195):78676999, (7196):102401031, (7197):214991879, (7198):512001031, (7199):550732807, (7200):644973575, (7201):1934918663, (IND):1032, (8204):33800, (8205):99336, (8206):164872, (8207):230408, (8208):295944, (8209):820232, (8210):885768, (8211):1606664, (8212):2655240, (8213):4097032, (8214):7963656, (8215):11240456, (8216):20481032, (8217):23888904, (8218):71664648, (8219):78677000, (8220):102401032, (8221):214991880, (8222):512001032, (8223):550732808, (8224):644973576, (8225):1934918664, (IND):1033, (9228):33801, (9!
 22!
>  9):99337, (9230):164873, (9231):230409, (9232):295945, (9233):820233, (9234):885769, (9235):1606665, (9236):2655241, (9237):4097033, (9238):7963657, (9239):11240457, (9240):20481033, (9241):23888905, (9242):71664649, (9243):78677001, (9244):102401033, (9245):214991881, (9246):512001033, (9247):550732809, (9248):644973577, (9249):1934918665, (IND):1034, (10252):33802, (10253):99338, (10254):164874, (10255):230410, (10256):295946, (10257):820234, (10258):885770, (10259):1606666, (10260):2655242, (10261):4097034, (10262):7963658, (10263):11240458, (10264):20481034, (10265):23888906, (10266):71664650, (10267):78677002, (10268):102401034, (10269):214991882, (10270):512001034, (10271):550732810, (10272):644973578, (10273):1934918666, (IND):1035, (11276):33803, (11277):99339, (11278):164875, (11279):230411, (11280):295947, (11281):820235, (11282):885771, (11283):1606667, (11284):2655243, (11285):4097035, (11286):7963659, (11287):11240459, (11288):20481035, (11289):23888907, (112!
 90!
>  ):71664651, (11291):78677003, (11292):102401035, (11293):214991883, (11!
>  294):512001035, (11295):550732811, (11296):644973579, (11297):1934918667, (IND):1036, (12300):33804, (12301):99340, (12302):164876, (12303):230412, (12304):295948, (12305):820236, (12306):885772, (12307):1606668, (12308):2655244, (12309):4097036, (12310):7963660, (12311):11240460, (12312):20481036, (12313):23888908, (12314):71664652, (12315):78677004, (12316):102401036, (12317):214991884, (12318):512001036, (12319):550732812, (12320):644973580, (12321):1934918668, (IND):1037, (13324):33805, (13325):99341, (13326):164877, (13327):230413, (13328):295949, (13329):820237, (13330):885773, (13331):1606669, (13332):2655245, (13333):4097037, (13334):7963661, (13335):11240461, (13336):20481037, (13337):23888909,
> [snip]
>  (IND):1023, (1047564):33791, (1047565):99327, (1047566):164863, (1047567):230399, (1047568):295935, (1047569):820223, (1047570):885759, (1047571):1606655, (1047572):2655231, (1047573):4097023, (1047574):7963647, (1047575):11240447, (1047576):20481023, (1047577):23888895, (1047578):71664639, (1047579):78676991, (1047580):102401023, (1047581):214991871, (1047582):512001023, (1047583):550732799, (1047584):644973567, (1047585):1934918655, (IND):1024, (1048588):33792, (1048589):99328, (1048590):164864, (1048591):230400, (1048592):295936, (1048593):820224, (1048594):885760, (1048595):1606656, (1048596):2655232, (1048597):4097024, (1048598):7963648, (1048599):11240448, (1048600):20481024, (1048601):23888896, (1048602):71664640, (1048603):78676992, (1048604):102401024, (1048605):214991872, (1048606):512001024, (1048607):550732800, (1048608):644973568, (1048609):1934918656
> TOTAL: 23553
> 
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