There seems to be an error in the Linux Kernel Documentation of the ext3 filesystem (/usr/src/linux/Documentation/filesystems/ext3.txt). It states acl (Posix Access Control Lists) are enabled by default, but they are certainly NOT. To enable them, one must add the "acl" option as a mount parameter. Reproducible: Always Steps to Reproduce: 1. read the file /usr/src/linux/Documentation/filesystems/ext3.txt 2. mount a ext3 filesystem with no additional parameters 3. execute as root (for example) : setfacl -m user:root:rwx /tmp/test.txt Actual Results: You get the message "setfacl: test.txt: Operation not supported"
Thanks, sent a patch upstream, will be fixed in future kernel releases.