[PATCH V2] xfs_repair: print superblock offsets and why they can't be verified
Barry Naujok
bnaujok at sgi.com
Thu Nov 20 19:03:36 CST 2008
On Fri, 24 Oct 2008 00:53:10 +1100, Eric Sandeen <sandeen at sandeen.net>
wrote:
> KELEMEN Peter wrote:
>> Eric has pointed out that verify_set_primary_sb() will either
>> return 1 or XR_INSUFF_SEC_SB. Move the check lower into
>> verify_set_primary_sb() by checking the return value of
>> verify_sb(). Example output:
>>
>> found candidate secondary superblock...
>> verifying sb at 31249334272: bad magic number (1)
>> verifying sb at 62498668544: bad magic number (1)
>> verifying sb at 93748002816: bad magic number (1)
>> verifying sb at 124997337088: bad magic number (1)
>> unable to verify superblock, continuing...
>>
>
> This looks better :) You may want to add even more info...
>
> while it's just searching block by block, if it finds a candidate, I'd
> print the sector offset for that candidate (your first output line).
>
> And rather than "verifying sb at..." you might do something like
> "comparing to sb N at offset X":
>
> + } else {
> + do_warn("comparing with sb %d at sector %Lu failed: %s (%d)\n",
> + agno, off, err_string(reason), reason);
>
> because at this point it's using the geometry of the candidate sb to see
> if it can be used to find enough other valid sb's....
Do I check in the patch as is or will there be an update?
Regards,
Barry.
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