Re: [pbs-devel] [PATCH proxmox-backup 1/5] backup: don't validate chunk existance if base was recently verified

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

On 30.09.20 15:25, Stefan Reiter wrote:
> If the base was successfully verified within the last 7 days, we assume
> that it is okay and all chunks exist, so we don't have to check.
> 
> Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
> ---
>  src/api2/backup/environment.rs | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/src/api2/backup/environment.rs b/src/api2/backup/environment.rs
> index d515bf30..be06d1dc 100644
> --- a/src/api2/backup/environment.rs
> +++ b/src/api2/backup/environment.rs
> @@ -457,6 +457,31 @@ impl BackupEnvironment {
>          Ok(())
>      }
>  
> +    fn last_backup_has_recent_verify(&self) -> Result<bool, Error> {
> +        match &self.last_backup {
> +            Some(last_backup) => {
> +                let last_dir = &last_backup.backup_dir;
> +                let (manifest, _) = self.datastore.load_manifest(last_dir)?;
> +                let verify = manifest.unprotected["verify_state"].clone();
> +                match serde_json::from_value::<Option<SnapshotVerifyState>>(verify) {
> +                    Ok(verify) => match verify {
> +                        Some(verify) => {
> +                            let cutoff = unsafe { libc::time(std::ptr::null_mut()) };
> +                            let cutoff = cutoff - 60*60*24*7; // one week back

Why unsafe and why not our `proxmox::tools::time::epoch_i64()` ?


on another note: we should probably add some helper for getting the
verify state

> +                            Ok(verify.state == VerifyState::Ok && verify.upid.starttime > cutoff)
> +                        },
> +                        None => Ok(false)
> +                    },
> +                    Err(err) => {
> +                        self.worker.warn(format!("error parsing base verification state : '{}'", err));
> +                        Ok(false)
> +                    }
> +                }
> +            },
> +            None => Ok(false)
> +        }
> +    }
> +
>      /// Ensure all chunks referenced in this backup actually exist.
>      /// Only call *after* all writers have been closed, to avoid race with GC.
>      /// In case of error, mark the previous backup as 'verify failed'.
> @@ -534,7 +559,9 @@ impl BackupEnvironment {
>              }
>          }
>  
> -        self.verify_chunk_existance(&state.known_chunks)?;
> +        if !self.last_backup_has_recent_verify()? {
> +            self.verify_chunk_existance(&state.known_chunks)?;
> +        }
>  
>          // marks the backup as successful
>          state.finished = true;
>