On 6/8/15 1:29 PM, Brian Foster wrote:
> On Mon, Jun 08, 2015 at 10:06:34AM -0500, Eric Sandeen wrote:
>> When doing an obfuscated xfs_metadump, if the log is clean, zero
>> it out for 2 reasons:
>>
>> * It'll make the image more compressible
>> * It'll eliminate an un-obfuscated metadata source
>>
>> If the log isn't clean, and the user expected obfuscation, warn
>> that metadata in the log will not be obfuscated.
>>
>> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
>> ---
>>
>> V2: If not obfuscating, copy log as-is
>>
>
> FYI, I think v1 of this was already pulled into the for-next branch.
> Anyways...
Yeah, I noticed - I'll ask dave to fix it (that one rebases, right?) :)
>> diff --git a/db/metadump.c b/db/metadump.c
>> index bea4e00..67de0c5 100644
>> --- a/db/metadump.c
>> +++ b/db/metadump.c
>> @@ -17,6 +17,7 @@
>> */
>>
>> #include <libxfs.h>
>> +#include <libxlog.h>
>> #include "bmap.h"
>> #include "command.h"
>> #include "metadump.h"
>> @@ -2169,6 +2170,8 @@ copy_sb_inodes(void)
>> static int
>> copy_log(void)
>> {
>> + int dirty;
>> +
>> if (show_progress)
>> print_progress("Copying log");
>>
>> @@ -2180,6 +2183,36 @@ copy_log(void)
>> print_warning("cannot read log");
>> return !stop_on_read_error;
>> }
>> +
>> + /* If not obfuscating, just copy the log as it is */
>> + if (!obfuscate)
>> + goto done;
>> +
>> + dirty = xlog_is_dirty(mp, &x, 0);
>> +
>> + switch (dirty) {
>> + case 0:
>> + /* clear out a clean log */
>> + if (show_progress)
>> + print_progress("Zeroing clean log");
>> + memset(iocur_top->data, 0,
>> + mp->m_sb.sb_logblocks * mp->m_sb.sb_blocksize);
>> + break;
>> + case 1:
>> + /* keep the dirty log */
>> + if (obfuscate)
>
> The 'if (obfuscate)' checks here and below are pointless with the
> !obfuscate bypass above. Seems fine otherwise.
Oh hell, I forgot I had those.
V3 coming.
-Eric
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