As some of you know, I've been working on CI support for XFS. Currently, the Linux VFS does not make this very easy and neat. One issue I've encountered is the case of rename in a CI filesystem where the destination is the same as the source (both parent and child) differing only in case. So, currently, do_rename() calls do_path_lookup() which gets the source and destination dentries, etc. The third parameter, flags, is stored in the nameidata structure which is passed to the filesystem implementations of lookup. vfs_rename() checks to see if the two dentry inodes are the same, and if so, just returns 0. I propose adding a 7th LOOKUP_xxx flag for the rename case where we indicate we are after an exact (non-CI) match for the destination name in the lookup call in do_rename. Filesystem support in lookup would check for this flag in addition to LOOKUP_CONTINUE not existing (ie. at the last component during lookup) and if so, do an exact lookup rather than a CI lookup as it normally would do. Traditional non-CI filesystems would ignore this flag. If this is deemed acceptable, or a better idea is proposed, I can write a patch for further scrutiny. Regards, Barry. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
