On 6/1/11 12:22 AM, Eric Sandeen wrote: > On 5/31/11 11:56 PM, Amir Goldstein wrote: >> On Wed, Jun 1, 2011 at 7:37 AM, Eric Sandeen <sandeen@xxxxxxxxxx> wrote: >>> On 5/31/11 10:13 PM, Amir Goldstein wrote: >>>> From: Amir Goldstein <amir73il@xxxxxxxxxxxx> >>>> >>>> blkid knows to identify the ext4dev FSTYP of a partition that was >>>> formatted with mkfs.ext4dev. >>>> quota tools and various util-linux utils are also aware of ext4dev, >>>> so ext4dev shares the same capabilities as ext4. >>>> >>>> While testing on Fedora 15, we encoutered a buggy fsck utility, which >>>> invokes fsck.ext4, even though it was called with -t ext4dev argument. >>>> In our setup fsck.ext4dev knows about new fs features that fsck.ext4 >>>> doesn't know, so the generic_fs_check fails. >>>> Since we have no real use of the extra capabilities provided by fsck util, >>>> we decided to invoke fsck.$FSTYP directly to avoid this issue. >>> >>> Adding ext4dev to every case seems harmless enough. TBH I thought I had >>> it there already but I guess not. >>> >>> I'm less certain of the change from fsck -t $FSTYP to fsck.$FSTYP >>> >>> What issue are you avoiding? wouldn't fsck -t ext4dev invoke fsck.ext4dev anyway? >>> >>> It seems like it should be harmless, but I don't understand how it helps you. >>> >> >> As I wrote in the patch description, the fsck utility in Fedora 15 invokes >> fsck.ext4 for some reason when calling fsck -t ext4dev. > > Oh, right. > >> this fails because fsck.ext4 doesn't know the snapshot feature. >> I didn't debug fsck utility for that. it seemed pointless. > > Did you file a bug with Fedora? I'd rather fix the root cause than work around it... > Feel free to cc: me on the bug. RHEL6 does the same; mkfs.ext4dev then fsck -t ext4dev invokes fsck.ext4; but this is because blkid identifies it as ext4, not ext4dev, despite the test_fs flag being set. ISTR this is due to some tortured logic about when ext4dev isn't ext4dev, but I don't remember the details... I don't know if this is the same situation you're seeing; just to double check - does blkid correctly identify it as ext4dev on F15? -Eric > -Eric > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
