This is primarily a cfuse bug.. it should generate EROFS locally. The MDS should also not crash. In any case, we shouldn't need the debug output. :) Thanks for the bug report! sage On Fri, 9 Jul 2010, Wido den Hollander wrote: > Hi Adam, > > Could you add "debug mds = 20" in your ceph.conf and retry? > > There should also be a file "core" in /, this is a dump which you can > use to make a backtrace with gdb (if you have the debug symbols). > > gdb /usr/bin/cmds /core > gdb> bt > > Could you try this? > > -- > Met vriendelijke groet, > > Wido den Hollander > CTO > Contact: http://www.pcextreme.nl/contact > > > On Fri, 2010-07-09 at 19:22 +0000, Adam C. Emerson wrote: > > I know it's not supported, but I tried it out to see what kind of > > error behaviour I would get. > > > > The following were preformed on a simple ceph filesystem (one monitor, > > one mds, one osd all on the same machine) running current unstable > > with the filesystem mounted via cfuse: > > > > /mnt# mkdir foo > > /mnt# cd foo > > /mnt/foo# cat > something > > These are the contents of the file. > > /mnt/foo# cd .snap > > /mnt/foo/.snap# mkdir old > > /mnt/foo/.snap# cd .. > > /mnt/foo# cat > something > > These are different contents of the file. > > /mnt/foo# cd .snap > > /mnt/foo/.snap# ls > > old/ > > /mnt/foo/.snap# cd old > > root@seasalt:/mnt/foo/.snap/old# ls > > something > > /mnt/foo/.snap/old# cat something > > These are the contents of the file. > > /mnt/foo/.snap/old# cat > something > > zsh: invalid argument: something > > /mnt/foo/.snap/old# cat > somthingelse > > These are divergent contents. > > > > This last command hangs, and in the MDS log I find: > > mds/CDir.cc: In function 'CDentry* CDir::add_null_dentry(const std::string&, snapid_t, snapid_t)': > > mds/CDir.cc:225: FAILED assert(lookup_exact_snap(dname, last) == 0) > > > > Thank you very much. > > -- > > To unsubscribe from this list: send the line "unsubscribe ceph-devel" 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 ceph-devel" 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 ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
