Date: Tue, 9 Sep 2008 08:29:17 -0400 From: Wesley Shields <wxs@FreeBSD.org> To: Kostik Belousov <kostikbel@gmail.com> Cc: freebsd-hackers <freebsd-hackers@freebsd.org>, jT <toyj@union.edu> Subject: Re: 256-byte inode support Message-ID: <20080909122917.GK62357@atarininja.org> In-Reply-To: <20080909115351.GJ39652@deviant.kiev.zoral.com.ua> References: <9f8af95f0809061626q22bc8f60i48fd95b32cef3d04@mail.gmail.com> <20080907150747.GB62357@atarininja.org> <20080909115351.GJ39652@deviant.kiev.zoral.com.ua>
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On Tue, Sep 09, 2008 at 02:53:51PM +0300, Kostik Belousov wrote: > On Sun, Sep 07, 2008 at 11:07:47AM -0400, Wesley Shields wrote: > > On Sat, Sep 06, 2008 at 07:26:27PM -0400, jT wrote: > > > hackers, > > > > > > since tytso had updated ext3 -- i've noticed that i can't use my > > > 265-byte inode ext3 drives -- is there any effort to update it? If > > > not -- if you know where i should attempt to start please let me know > > > so i can start working on support (i have a few other people i know > > > interested in this) -- thanks and hope everyone is well > > > > There was a PR submitted for it and eventually a patch added to the PR. > > I've tested the patch given in the URL at the port and it works. We > > will start to see more of this as the newer version becomes more common > > in the wild. > > > > http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/124621 > > > > Would be nice to see this fixed in 7.1 but it may be too late for that. > > What was the reason for increasing inode size ? I think it is rather > pointless to increase the size without using newly added space for some > data. Is inode format the same for the first 128 bytes, and does data > at the second 128 bytes should be used to correctly interpret inode ? I honestly don't know the answer. Though I do agree that it is pointless to increase the size without using the new space. All I know is that I was unable to read an ext filesystem made with -I 256 (which is the default when using the most recent sysutils/e2fsprogs). wxs@ack ~ % truncate -s 1G ext-128 wxs@ack ~ % truncate -s 1G ext-256 wxs@ack ~ % sudo mdconfig -a -t vnode -f ext-128 -s 1G md0 wxs@ack ~ % sudo mdconfig -a -t vnode -f ext-256 -s 1G md1 wxs@ack ~ % sudo kldload ext2fs wxs@ack ~ % mke2fs -I 128 /dev/md0 mke2fs 1.41.0 (10-Jul-2008) mke2fs: Permission denied while trying to determine filesystem size wxs@ack ~ % sudo mke2fs -I 128 /dev/md0 mke2fs 1.41.0 (10-Jul-2008) Filesystem label= OS type: FreeBSD Block size=4096 (log=2) Fragment size=4096 (log=2) 65536 inodes, 262144 blocks 13107 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=268435456 8 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376 Writing inode tables: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 27 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. wxs@ack ~ % sudo mke2fs /dev/md1 mke2fs 1.41.0 (10-Jul-2008) Filesystem label= OS type: FreeBSD Block size=4096 (log=2) Fragment size=4096 (log=2) 65536 inodes, 262144 blocks 13107 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=268435456 8 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376 Writing inode tables: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 37 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. wxs@ack ~ % sudo mount -t ext2fs /dev/md0 /mnt/ext2-128 wxs@ack ~ % sudo mount -t ext2fs /dev/md1 /mnt/ext2-256 wxs@ack ~ % ls /mnt/ext2-128 lost+found/ wxs@ack ~ % ls /mnt/ext2-256 ls: /mnt/ext2-256: Bad file descriptor wxs@ack ~ % -- WXS
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