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List:       ceph-devel
Subject:    Re: rbd snapshot copy
From:       Christian Brunner <chb () muc ! de>
Date:       2011-08-23 12:19:37
Message-ID: CAO47_-_zoCOM=R=y4Zp4MSfBBCR8MfD9TwOmuVGPc-2CG3SZ8A () mail ! gmail ! com
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Hi Sage,

I saw your patches in the git repository and have now tested them.
Everything is looking good so far.

Thanks,
Christian

2011/8/19 Tommi Virtanen <tommi.virtanen@dreamhost.com>:
> On Fri, Aug 19, 2011 at 01:46, Christian Brunner <chb@muc.de> wrote:
>> I tried using rbd snapshots for the first time today. Creating a
>> snapshot works, but I'm not able to copy the snapshot to a new volume
>> (I'm still using 0.32).
>>
>> Here is what I get:
>>
>> # rbd snap create --snap=mysnapshot myimage
>> # rbd cp --snap=mysnapshot myimage mysnapcopy
>> *** Caught signal (Segmentation fault) **
>>  in thread 0x7fd91280a720
>>  ceph version 0.32 (commit:c08d08baa6a945d989427563e46c992f757ad5eb)
>>  1: rbd() [0x449034]
>>  2: (()+0xf520) [0x7fd911e00520]
>>  3: (librbd::snap_set(librbd::ImageCtx*, char const*)+0x10) [0x7fd9123eb6a0]
>>  4: (main()+0x49f) [0x443bcf]
>>  5: (__libc_start_main()+0xfd) [0x7fd9109f4c9d]
>>  6: rbd() [0x440f29]
>> Segmentation fault
>>
>>
>> Is this a bug or am I using the wrong syntax?
>
> I'm not 100% sure whether that syntax is meant to work, but it most
> definitely should not crash.
>
> The crash is completely reproducible. On my vstart dev environment:
>
> $ ./rbd create test --size=10
> $ ./rbd ls
> test
> $ ./rbd snap create --snap=stest test
> $ ./rbd cp --snap=stest test stest2
> *** Caught signal (Segmentation fault) **
>  in thread 0x7f03b296d720
>  ceph version 0.32-238-g75e6731
> (commit:75e673180ad48398b6995a4c27d973bf27ee376f)
>  1: /home/tv/src/ceph.git/src/.libs/lt-rbd() [0x446d24]
>  2: (()+0xfb40) [0x7f03b1f69b40]
>  3: (librbd::snap_set(librbd::ImageCtx*, char const*)+0x10) [0x7f03b25682f0]
>  4: (main()+0x47f) [0x44197f]
>  5: (__libc_start_main()+0xfe) [0x7f03b098fd8e]
>  6: /home/tv/src/ceph.git/src/.libs/lt-rbd() [0x43ed49]
>
> Segmentation fault (core dumped)
>
>
> I opened a ticket for this: http://tracker.newdream.net/issues/1416
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