[pbs-devel] [PATCH proxmox-backup 2/2] status: use Option on avail/used datastore attrs

[Dietmar Maurer]

But this is not backwards compatible. Deserialization fail now for -1 (when connecting to an old server which returns -1)?

> On 7.12.2023 15:35 CET Gabriel Goller <g.goller at proxmox.com> wrote:
> 
>  
> Instead of returning -1 if we can't get the attributes, we use an
> Option which will not be serialized on `None`.
> 
> Signed-off-by: Gabriel Goller <g.goller at proxmox.com>
> ---
>  pbs-api-types/src/datastore.rs | 19 +++++++++++--------
>  src/api2/status.rs             |  6 +++---
>  2 files changed, 14 insertions(+), 11 deletions(-)
> 
> diff --git a/pbs-api-types/src/datastore.rs b/pbs-api-types/src/datastore.rs
> index d4ead1d1..c361dc30 100644
> --- a/pbs-api-types/src/datastore.rs
> +++ b/pbs-api-types/src/datastore.rs
> @@ -1302,12 +1302,15 @@ pub struct DataStoreStatus {
>  /// Status of a Datastore
>  pub struct DataStoreStatusListItem {
>      pub store: String,
> -    /// The Size of the underlying storage in bytes. (-1 on error)
> -    pub total: i64,
> -    /// The used bytes of the underlying storage. (-1 on error)
> -    pub used: i64,
> +    /// The Size of the underlying storage in bytes.
> +    #[serde(skip_serializing_if = "Option::is_none")]
> +    pub total: Option<i64>,
> +    /// The used bytes of the underlying storage.
> +    #[serde(skip_serializing_if = "Option::is_none")]
> +    pub used: Option<i64>,
>      /// The available bytes of the underlying storage. (-1 on error)
> -    pub avail: i64,
> +    #[serde(skip_serializing_if = "Option::is_none")]
> +    pub avail: Option<i64>,
>      /// A list of usages of the past (last Month).
>      #[serde(skip_serializing_if = "Option::is_none")]
>      pub history: Option<Vec<Option<f64>>>,
> @@ -1335,9 +1338,9 @@ impl DataStoreStatusListItem {
>      pub fn empty(store: &str, err: Option<String>) -> Self {
>          DataStoreStatusListItem {
>              store: store.to_owned(),
> -            total: -1,
> -            used: -1,
> -            avail: -1,
> +            total: None,
> +            used: None,
> +            avail: None,
>              history: None,
>              history_start: None,
>              history_delta: None,
> diff --git a/src/api2/status.rs b/src/api2/status.rs
> index ff7d4cbd..6e758187 100644
> --- a/src/api2/status.rs
> +++ b/src/api2/status.rs
> @@ -68,9 +68,9 @@ pub async fn datastore_status(
>  
>          let mut entry = DataStoreStatusListItem {
>              store: store.clone(),
> -            total: status.total as i64,
> -            used: status.used as i64,
> -            avail: status.available as i64,
> +            total: Some(status.total as i64),
> +            used: Some(status.used as i64),
> +            avail: Some(status.available as i64),
>              history: None,
>              history_start: None,
>              history_delta: None,
> -- 
> 2.39.2
> 
> 
> 
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