Florian Weimer <fweimer@xxxxxxxxxx> wrote: > > Rather than adding a fchmodat2() syscall, should we add a > > "set_file_attrs()" syscall that takes a mask and allows you to set a bunch > > of stuff all in one go? Basically, an interface to notify_change() in the > > kernel that would allow several stats to be set atomically. This might be > > of particular interest to network filesystems. > > Do you mean atomically as in compare-and-swap (update only if old values > match), or just a way to update multiple file attributes with a single > system call? I was thinking more in terms of the latter. AFAIK, there aren't any network filesystems support a CAS interface on file attributes like that. To be able to do a CAS operation, we'd need to pass in the old values as well as the new. Another thing we could look at is doing "create_and_set_attrs()", possibly allowing it to take a list of xattrs also. David
