On Mon, Feb 10, 2014 at 12:06:05PM +0000, Ian Nartowicz wrote: > Zheng Liu <gnehzuil.liu <at> gmail.com> writes: > > > > > On Sun, Feb 09, 2014 at 03:45:12PM +0000, Ian Nartowicz wrote: > > > Ian Nartowicz <claws <at> nartowicz.co.uk> writes: > > > > > > I copied the contents of /home onto the new partition. fsck reports, and > > > other utilities confirm, that symlinks with targets of 60 characters or > > > longer were corrupted by the copy. For example, a truncated symlink: > > > All That You Can't Leave Behind.m3u -> /data/cd/U2/All That You Can't Leave > > > Behind/playlist.flac.m > > > > > > If I create the same symlink with ln, it appears OK until I unmount and > > > mount the partition, then it shows truncated. fsck doesn't like it but is > > > unable to correct it. > > > > That would be great if you can provide some steps to reproduce this > > issue. I write a simple script to try to reproduce it, but I couldn't > > hit the problem. Am I missing something? > > > > #!/bin/bash > > > > mkdir test > > cd test > > filename="ALL-That-You-Can't-Leave-Behind.m3u" > > > > echo "hello" > $filename > > ln -s $filename symlinkfile > > readlink symlinkfile > > > > newdir="data/cd" > > mkdir -p $newdir > > cp -d symlinkfile $newdir > > readlink $newdir/symlinkfile > > > > Thanks, > > - Zheng > > -- > > To reproduce this on my system, the full path for $filename needs to be > longer than 60 characters. That seems to be the only requirement. Create > the symlink, unmount, mount, and the target path of the synlink is truncated > to 59 characters and hence the link is broken. > > fsck reports those symlinks as follows: > Symlink /iann/test.m3u (inode #139) is invalid. > Clear<y>? no > Entry 'test.m3u' in /iann (8001) has an incorrect filetype (was 7, should be 0). > Fix<y>? no > > If I try to clear or fix, it just leaves behind damaged inodes which fsck > can't fix. I believe that this patch can fix the bug that corrupts the fast symlink [1]. Meanwhile e2fsck should fix this issue but it doesn't. So there is a bug in e2fsprogs. I will try to fix it soon. 1. http://permalink.gmane.org/gmane.comp.file-systems.ext4/42518 Thanks, - Zheng -- 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
