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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| use std::{ | ||
| ops::{Deref, Range}, | ||
| rc::Rc, | ||
| }; | ||
|
|
||
| use super::{ | ||
| rebuild_descriptor::RebuildDescriptor, | ||
| rebuild_error::RebuildError, | ||
| rebuild_job_backend::RebuildBackend, | ||
| rebuild_task::{RebuildTasks, TaskResult}, | ||
| RebuildJob, | ||
| RebuildJobOptions, | ||
| SEGMENT_TASKS, | ||
| }; | ||
|
|
||
| use crate::gen_rebuild_instances; | ||
|
|
||
| /// A Bdev rebuild job is responsible for managing a rebuild (copy) which reads | ||
| /// from source_hdl and writes into destination_hdl from specified start to end. | ||
| pub struct BdevRebuildJob(RebuildJob); | ||
|
|
||
| impl std::fmt::Debug for BdevRebuildJob { | ||
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
| self.0.fmt(f) | ||
| } | ||
| } | ||
| impl Deref for BdevRebuildJob { | ||
| type Target = RebuildJob; | ||
|
|
||
| fn deref(&self) -> &Self::Target { | ||
| &self.0 | ||
| } | ||
| } | ||
|
|
||
| impl BdevRebuildJob { | ||
| /// Creates a new RebuildJob which rebuilds from source URI to target URI | ||
| /// from start to end (of the data partition); notify_fn callback is called | ||
| /// when the rebuild state is updated - with the nexus and destination | ||
| /// URI as arguments. | ||
| pub async fn new( | ||
| src_uri: &str, | ||
| dst_uri: &str, | ||
| range: Option<Range<u64>>, | ||
| options: RebuildJobOptions, | ||
| notify_fn: fn(&str, &str) -> (), | ||
| ) -> Result<Self, RebuildError> { | ||
| let descriptor = | ||
| RebuildDescriptor::new(src_uri, dst_uri, range, options).await?; | ||
| let tasks = RebuildTasks::new(SEGMENT_TASKS, &descriptor)?; | ||
| let backend = | ||
| BdevRebuildJobBackend::new(tasks, notify_fn, descriptor).await?; | ||
|
|
||
| RebuildJob::from_backend(backend).await.map(Self) | ||
| } | ||
| } | ||
|
|
||
| gen_rebuild_instances!(BdevRebuildJob); | ||
|
|
||
| /// A rebuild job which is responsible for rebuilding from | ||
| /// source to target of the `RebuildDescriptor`. | ||
| pub(super) struct BdevRebuildJobBackend { | ||
| /// The next block to be rebuilt. | ||
| next: u64, | ||
| /// A pool of tasks which perform the actual data rebuild. | ||
| task_pool: RebuildTasks, | ||
| /// A generic rebuild descriptor. | ||
| descriptor: Rc<RebuildDescriptor>, | ||
| /// Notification callback with src and dst uri's. | ||
| notify_fn: fn(&str, &str) -> (), | ||
| } | ||
|
|
||
| #[async_trait::async_trait(?Send)] | ||
| impl RebuildBackend for BdevRebuildJobBackend { | ||
| fn on_state_change(&mut self) { | ||
| (self.notify_fn)(&self.descriptor.src_uri, &self.descriptor.dst_uri); | ||
| } | ||
|
|
||
| fn cmn_descriptor(&self) -> &RebuildDescriptor { | ||
| &self.descriptor | ||
| } | ||
|
|
||
| fn task_pool(&self) -> &RebuildTasks { | ||
| &self.task_pool | ||
| } | ||
|
|
||
| fn schedule_task_by_id(&mut self, id: usize) -> bool { | ||
| if self.next >= self.descriptor.range.end { | ||
| false | ||
| } else { | ||
| let next = std::cmp::min( | ||
| self.next + self.descriptor.segment_size_blks, | ||
| self.descriptor.range.end, | ||
| ); | ||
| self.task_pool.schedule_segment_rebuild( | ||
| id, | ||
| self.next, | ||
| self.descriptor.clone(), | ||
| ); | ||
| self.task_pool.active += 1; | ||
| self.next = next; | ||
| true | ||
| } | ||
| } | ||
|
|
||
| async fn await_one_task(&mut self) -> Option<TaskResult> { | ||
| self.task_pool.await_one_task().await | ||
| } | ||
| } | ||
|
|
||
| impl std::fmt::Debug for BdevRebuildJobBackend { | ||
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
| f.debug_struct("BdevRebuildJob") | ||
| .field("next", &self.next) | ||
| .finish() | ||
| } | ||
| } | ||
| impl std::fmt::Display for BdevRebuildJobBackend { | ||
| fn fmt(&self, _f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| impl BdevRebuildJobBackend { | ||
| /// Creates a new RebuildJob which rebuilds from source URI to target URI | ||
| /// from start to end (of the data partition); notify_fn callback is called | ||
| /// when the rebuild state is updated - with the source and destination | ||
| /// URI as arguments. | ||
| pub async fn new( | ||
| task_pool: RebuildTasks, | ||
| notify_fn: fn(&str, &str) -> (), | ||
| descriptor: RebuildDescriptor, | ||
| ) -> Result<Self, RebuildError> { | ||
| let be = Self { | ||
| next: descriptor.range.start, | ||
| task_pool, | ||
| descriptor: Rc::new(descriptor), | ||
| notify_fn, | ||
| }; | ||
|
|
||
| info!("{be}: backend created"); | ||
|
|
||
| Ok(be) | ||
| } | ||
| } |
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