On Wed, Sep 29, 2010 at 12:28:51AM +0200, Goffredo Baroncelli wrote: > Hi Josef, > > what about using your ioctl to exporting also other info ? For example devid, > size, bytes, uuid ... > > I know that btrfs filesystem-show does the same, but it reads the partition > (the disk) instead of query the filesystem. That means: > - It work even for unmounted filesystem (which is good) > - The results are inaccurate for a mounted filesystem, because the read data > is not valid until a flush of the pages (which is bad.. very bad). >
Well a) the data on disk is always valid, thats the point :). And b) the only way the data is not uptodate is if we happened to add/remove/resize a disk right before running btrfs-show, something that isn't going to happen often. So I think btrfs-show solves this problem well enough. My ioctl is to give apps a nice quick programmable way to get the list of disks in the fs so they can do whatever they want instead of having to ship a libbtrfs or some such thing and make them use that. Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
