On Thu, Jan 31, 2019 at 10:47:12AM +0900, Wang Shilong wrote: > From: Wang Shilong <wshilong@xxxxxxx> > > Currently there is no way to change project ID of > symlink file itself, this is important to implement > Directory quota for an existed directory. This seems like something open(O_PATH|O_NOFOLLOW) should allow. from open(2): If pathname is a symbolic link and the O_NOFOLLOW flag is also specified, then the call returns a file descriptor referring to the symbolic link. This file descriptor can be used as the dirfd argument in calls to fchownat(2), fstatat(2), linkat(2), and read¿ linkat(2) with an empty pathname to have the calls operate on the symbolic link. Changing the project id is the equivalent of fchownat()..... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx
