On Thu, 2007-01-04 at 12:34 +0100, Jens Nie wrote: > Hello List. > > I think i found a bug in the ext3 filesystem. It deals with > dereferencing symlinks. I have installed a fresh openSUSE 10.2 on an > ext3 filesystem. > After that i wanted to include some selfmade LaTeX-classes by creating > a symlink within /usr/share/texmf/tex/latex to the directory > containing the class. texhash lists the new link within > /usr/share/texmf/ls-R. However the complete content of the classes > directory is missing. File and directory permissions are OK. I suspect > that the dereferencing of symlinks to the target directory does not > work on ext3. To check that i tested an older SuSE Installation with > reiserfs, which works as expected. Another test i made was creating an > ext3 fs, xfs and reiserfs on a loopback device. Within this test > filesystem that i mounted temporarily to /mnt i created a symlink to > /usr. Issuing the command ls -LRa, which is exactly what texhash is > using and should dereference the link to /usr did not recursively list > the contents of /usr on the ext3 filesystem whereas it did on the > reiserfs and xfs. I did a little playing around with strace and I suspect that it may have something to do with ext3 returning DT_LNK to the filldir routine (which gets returned through getdents64). A lot of file systems always return DT_UNKNOWN. Maybe ls is handling the DT_UNKNOWN case alright, but not the DT_LNK case. (When DT_UNKNOWN is returned, ls calls stat64() which would identify the symlink as a directory rather than a symlink.) > The test system was a dual opteron (x86_64) as well as a mobile Athlon > (i386) system running openSUSE 10.2. > > I reported this on the opensuse mailing list first. Someone there was > kind enough to point me directly to this list. > > Some more information which might be useful for people not being > directly familiar with opensuse: > > - kernel 2.6.18.2 possibly with typical SuSE changes (SuSE release is > 2.6.18.2-34-default) > - e2fsprogs 1.39 > - coreutils 6.4 > > Any ideas? Can anyone confirm that this is a bug? Any solutions? > > Best Regards > > Jens -- David Kleikamp IBM Linux Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
