On 03/10/2014 09:02 PM, Lennart Poettering wrote: > On Mon, 10.03.14 19:34, Goffredo Baroncelli (kreij...@libero.it) wrote: > > Heya, > >> Instead of relying on the subvolume UUID, why not relying to the subvolume >> name: it would be more simple and flexible to manage them. >> >> For example supposing to use '@' as prefix for a subvolume name: >> >> @ -> root filesystem >> @etc -> etc >> @home -> home >> [...] > > Well, the name is property of the admin really. There needs to be a way > how the admin can label his subvolumes, with a potentially localized > name. This makes it unsuitable for our purpose, we cannot just take > possession of this and leave the admin with nothing.
Instead of the name we can use the xattr to store these information. > On GPT there are also gpt partition labels and partition types. The > former are property of the admin, he can place there whatever he wants, > in whatever language he chooses... The latter however is how we make > sense of it on a semantical level. > >> Or in another way we could group the different systems in subdirectories: >> >> @home -> home of all the systems >> @srv -> srv of all the systems >> fedora/@ -> root of a fedora system >> fedora/@etc -> etc of the fedora system >> fedora2/@ -> root of a fedora2 system >> fedora2/@etc -> etc of the fedora2 system > > I am pretty sure automatic discovery of mount points should not cover > the usecase where people install multiple distributions into the same > btrfs volume. THe automatic logic should cover the simple cases only, > and it sounds way over the top to support installing multiple OSes into > the same btrfs... I mean, people can do that, if they want to, they just > have to write a proper fstab, which I think is not too much too ask... In your specification, you referred the use case of "container" (via nspawn / libvrt-lxc). which have to boot "a disk image". Why you don't mind to use a container on a btrfs snapshot ? I think that it will be reasonable to have different containers on a snapshots of the same filesystem-tree. > > Lennart > -- gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- 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
