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kubescape / storage

Apache License 2.0
1 stars 6 forks source link

refactor locks to prevent race on get list #101

Closed matthyx closed 4 months ago

matthyx commented 4 months ago

Type

enhancement, bug_fix

Description

Changes walkthrough

Relevant files
Enhancement
storage.go
Refactor Storage Locking and Streamline JSON Handling       
pkg/registry/file/storage.go
  • Introduced keyFromPath function to derive a key from a file path.
  • Refactored locking mechanism to lock on specific keys derived from
    file paths instead of broad categories.
  • Optimized GetList, GetByNamespace, GetClusterScopedResource, and
    GetByCluster functions by centralizing JSON object appending logic.
  • Removed redundant file reading and unmarshalling logic scattered
    across multiple functions.
    		•  +11/-26 

    ✨ PR-Agent usage: Comment /help on the PR to get a list of all available PR-Agent tools and their descriptions

    github-actions[bot] commented 4 months ago

    Summary:

    codiumai-pr-agent[bot] commented 4 months ago

    PR Description updated to latest commit (https://github.com/kubescape/storage/commit/bdeaa660e65acc9a8126da9cc1ae3011a9401f1f)

    codiumai-pr-agent[bot] commented 4 months ago

    PR Review

    ⏱️ Estimated effort to review [1-5] 2, because the changes are well-documented, focused on a specific enhancement and bug fix, and the diff is not overly complex. However, understanding the context and implications of the locking mechanism changes requires some domain knowledge.
    🧪 Relevant tests No
    🔍 Possible issues Granularity of Locks: The change to lock on specific keys derived from file paths increases the granularity of locks, which can prevent race conditions but might introduce deadlocks if not handled properly across the system.
    Locking Mechanism Changes: The removal of broad locks in favor of more specific locks requires thorough testing to ensure that it does not introduce new race conditions or performance bottlenecks.
    Error Handling: The PR seems to streamline error handling in file operations, but it's crucial to ensure that all error paths are properly tested, especially in scenarios where file access might fail.
    🔒 Security concerns No
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    codiumai-pr-agent[bot] commented 4 months ago

    PR Code Suggestions

    CategorySuggestions                                                                                                                                                       
    Best practice
    Add error handling for path manipulation in keyFromPath. ___ **Consider handling the error returned by filepath.Ext and
    strings.TrimPrefix/strings.TrimSuffix in keyFromPath function to ensure robust error
    handling. Ignoring errors can lead to unexpected behavior or security vulnerabilities.** [pkg/registry/file/storage.go [122-123]](https://github.com/kubescape/storage/pull/101/files#diff-c1f824146dbd5c96b0a182e5ff4056cc88592afb5904c19a2b5399f2d94a8812R122-R123) ```diff extension := filepath.Ext(path) -return strings.TrimPrefix(strings.TrimSuffix(path, extension), s.root) +trimmedPath := strings.TrimSuffix(path, extension) +key, err := strings.TrimPrefix(trimmedPath, s.root) +if err != nil { + // handle error appropriately +} +return key ```
    Handle file system errors in the Count function. ___ **It's recommended to handle the errors for afero.Exists and afero.IsDir in the Count
    function to prevent potential issues due to unhandled file system errors.** [pkg/registry/file/storage.go [535-536]](https://github.com/kubescape/storage/pull/101/files#diff-c1f824146dbd5c96b0a182e5ff4056cc88592afb5904c19a2b5399f2d94a8812R535-R536) ```diff -pathExists, _ := afero.Exists(s.appFs, metadataPath) -pathIsDir, _ := afero.IsDir(s.appFs, metadataPath) +pathExists, err := afero.Exists(s.appFs, metadataPath) +if err != nil { + // handle error +} +pathIsDir, err := afero.IsDir(s.appFs, metadataPath) +if err != nil { + // handle error +} ```
    Handle file opening errors in appendJSONObjectFromFile by returning early. ___ **Refactor the appendJSONObjectFromFile function to directly return after logging the error
    for file opening failure, to avoid executing subsequent code when file is nil.** [pkg/registry/file/storage.go [697-699]](https://github.com/kubescape/storage/pull/101/files#diff-c1f824146dbd5c96b0a182e5ff4056cc88592afb5904c19a2b5399f2d94a8812R697-R699) ```diff file, err := s.appFs.Open(path) if err != nil { - // skip if file is not readable, maybe it was deleted + logger.L().Ctx(ctx).Error("opening file failed", helpers.Error(err), helpers.String("path", path)) + return err // or handle the error as appropriate } ```
    Enhancement
    Add error handling for appendJSONObjectFromFile calls within loops. ___ **Implement error handling for the appendJSONObjectFromFile function calls within loops to
    ensure that errors do not halt the execution or lead to incomplete operations.** [pkg/registry/file/storage.go [351-352]](https://github.com/kubescape/storage/pull/101/files#diff-c1f824146dbd5c96b0a182e5ff4056cc88592afb5904c19a2b5399f2d94a8812R351-R352) ```diff if err := s.appendJSONObjectFromFile(path, v); err != nil { logger.L().Ctx(ctx).Error("appending JSON object from file failed", helpers.Error(err), helpers.String("path", path)) + // Consider handling the error, e.g., by returning it or aggregating errors } ```
    Possible issue
    Ensure concurrency control is managed after lock operation removals. ___ **Since the removal of lock operations (s.locks.RLock(key) and s.locks.RUnlock(key)) in
    various functions, ensure that concurrency control is managed elsewhere to prevent race
    conditions or data inconsistency.** [pkg/registry/file/storage.go [321]](https://github.com/kubescape/storage/pull/101/files#diff-c1f824146dbd5c96b0a182e5ff4056cc88592afb5904c19a2b5399f2d94a8812R321-R321) ```diff +// Ensure that concurrency control is handled appropriately to prevent race conditions _, spanLock := otel.Tracer("").Start(ctx, "waiting for lock") spanLock.End() +// Consider re-adding lock operations or implementing alternative concurrency control mechanisms ```
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    github-actions[bot] commented 4 months ago

    Summary:

    github-actions[bot] commented 4 months ago

    Summary: