Daniel Rosenberg <drosen@xxxxxxxxxx> writes: > This adds a function to set dentry operations at lookup time that will > work for both encrypted filenames and casefolded filenames. > > A filesystem that supports both features simultaneously can use this > function during lookup preparations to set up its dentry operations once > fscrypt no longer does that itself. > > Currently the casefolding dentry operation are always set if the > filesystem defines an encoding because the features is toggleable on > empty directories. Unlike in the encryption case, the dentry operations > used come from the parent. Since we don't know what set of functions > we'll eventually need, and cannot change them later, we enable the > casefolding operations if the filesystem supports them at all. > > By splitting out the various cases, we support as few dentry operations > as we can get away with, maximizing compatibility with overlayfs, which > will not function if a filesystem supports certain dentry_operations. > > Signed-off-by: Daniel Rosenberg <drosen@xxxxxxxxxx> > Reviewed-by: Eric Biggers <ebiggers@xxxxxxxxxx> Reviewed-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx> -- Gabriel Krisman Bertazi
