Re: [pbs-devel] [PATCH backup] zfs: check if given pool name is reserved

[Thomas Lamprecht <t.lamprecht@proxmox.com>]

On 23.11.21 13:21, Oguz Bektas wrote:
> man zpool-create:
> The pool names mirror, raidz, draid, spare and log are reserved, as
> are names _beginning_ with mirror, raidz, draid, and spare. The vdev
> specification is described in the Virtual Devices section of
> zpoolconcepts(7).
> 
> Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>
> ---
>  src/api2/node/disks/zfs.rs | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/src/api2/node/disks/zfs.rs b/src/api2/node/disks/zfs.rs
> index c9a6ac72..58e5a83e 100644
> --- a/src/api2/node/disks/zfs.rs
> +++ b/src/api2/node/disks/zfs.rs
> @@ -201,6 +201,15 @@ pub fn create_zpool(
>      };
>  
>      // Sanity checks
> +
> +    lazy_static::lazy_static! {
> +        // pool names starting with these are reserved
> +        static ref RESERVED_POOL_NAMES: regex::Regex = regex::Regex::new(r"^(mirror|raidz|draid|spare).*$").unwrap();
> +    }
> +    if RESERVED_POOL_NAMES.is_match(&name) || &name == "log" {
> +        bail!("Pool name {:?} is reserved.", &name);
> +    }
> +
>      if raidlevel == ZfsRaidLevel::Raid10 && devices.len() % 2 != 0 {
>          bail!("Raid10 needs an even number of disks.");
>      }
> 

zpool already gets us the error, lets rather forward that as I do not want to
maintain such things here if somehow possible.