On Fri, Oct 16, 2015 at 8:17 AM, Andreas Gruenbacher <agruenba@xxxxxxxxxx> wrote: > Automatic Inheritance (AI) allows changes to the acl of a directory to > propagate down to children. > > This is mostly implemented in user space: when a process changes the > permissions of a directory and Automatic Inheritance is enabled for that > directory, the process must propagate those changes to all children, > recursively. > > The kernel enables this by keeping track of which permissions have been > inherited at create time. In addition, it makes sure that permission > propagation is turned off when the permissions are set explicitly (for > example, upon create or chmod). > > Automatic Inheritance works as follows: > > - When the RICHACL_AUTO_INHERIT flag in the acl of a file or directory > is not set, the file or directory is not affected by AI. > > - When the RICHACL_AUTO_INHERIT flag in the acl of a directory is set > and a file or subdirectory is created in that directory, the > inherited acl will have the RICHACL_AUTO_INHERIT flag set, and all > inherited aces will have the RICHACE_INHERITED_ACE flag set. This > allows user space to distinguish between aces which have been > inherited and aces which have been explicitly added. What if the file or subdirectory that's created in that directory is a hard link? --Andy _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
