Bruce, On 29.12.2016 16:34, J. Bruce Fields wrote: >> That way UBIFS can provide a 64bit readdir() cookie which is required for NFS3. > > Sounds good. And if a matching entry isn't found (as in the case of a > concurrent unlink), what happens? The answer must be the same as for > ext4, but I've forgotten the details.... I guess it must find the next > highest cookie (thinking of the cookie as a 64-bit integer of some kind) > that exists in the directory. And that must be the same order that > readdir normally returns entries in. If a 64bit cookie is not found, the lookup function returns -ENOENT. In UBIFS we cannot just select a higher or lower key (cookie in this case), since it is the B-tree key and would point to a completely different entry. So, in case of a concurrent unlink() one would succeed and one fail with -ENOENT. Unless I miss something that seems okay to me. Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
