Hello <list>, I use AUFS in the common copy-on-write scenario. When writing to a file that has hardlinks in the readonly-branch I run into an I/O-Error. The following script reproduces the problem both on kernel 2.6.32 (aufs 2.1) and 3.2.0 (aufs 3.2-20120109):
$ mkdir rw $ mkdir ro $ mkdir cow $ echo "foo" > ro/foo $ ln ro/foo ro/bar $ mount -t aufs -o br=./rw=rw:./ro=rr,udba=none,rw hardlink_test cow $ echo "bar" > cow/foo # fail! The `echo "bar" > cow/foo` fails with an I/O-Error while producing an empty file "rw/foo". Checking the log files I see the following: $ dmesg | grep aufs | tail -1 aufs au_lkup_neg:326:aufsd/0[43]: I/O Error, foo should be negative on b0. Subsequent writes to cow/foo work perfectly fine. Is this a known issue? Best, René
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