Context cancellation during reading range reading large files (#7093)

* context cancellation during reading range reading large files

* address comments

* cancellation for fuse read

* fix cancellation

* pass in context for each function to avoid racing condition

* Update reader_at_test.go

* remove dead code

* Update weed/filer/reader_at.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/filer/filechunk_group.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/filer/filechunk_group.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* address comments

* Update weed/mount/weedfs_file_read.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/mount/weedfs_file_lseek.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/mount/weedfs_file_read.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/filer/reader_at.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update weed/mount/weedfs_file_lseek.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* test cancellation

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

14 files changed, 231 insertions, 49 deletions

diff --git a/weed/command/filer_cat.go b/weed/command/filer_cat.go
index 136440109..7f2ac12d6 100644
--- a/weed/command/filer_cat.go
+++ b/weed/command/filer_cat.go
@@ -3,14 +3,15 @@ package command
 import (
 	"context"
 	"fmt"
+	"net/url"
+	"os"
+	"strings"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/wdclient"
 	"google.golang.org/grpc"
-	"net/url"
-	"os"
-	"strings"
 
 	"github.com/seaweedfs/seaweedfs/weed/security"
 	"github.com/seaweedfs/seaweedfs/weed/util"
diff --git a/weed/filer/filechunk_group.go b/weed/filer/filechunk_group.go
index 0de2d3702..0f449735a 100644
--- a/weed/filer/filechunk_group.go
+++ b/weed/filer/filechunk_group.go
@@ -45,7 +45,7 @@ func (group *ChunkGroup) AddChunk(chunk *filer_pb.FileChunk) error {
 	return nil
 }
 
-func (group *ChunkGroup) ReadDataAt(fileSize int64, buff []byte, offset int64) (n int, tsNs int64, err error) {
+func (group *ChunkGroup) ReadDataAt(ctx context.Context, fileSize int64, buff []byte, offset int64) (n int, tsNs int64, err error) {
 	if offset >= fileSize {
 		return 0, 0, io.EOF
 	}
@@ -68,7 +68,7 @@ func (group *ChunkGroup) ReadDataAt(fileSize int64, buff []byte, offset int64) (
 			n = int(int64(n) + rangeStop - rangeStart)
 			continue
 		}
-		xn, xTsNs, xErr := section.readDataAt(group, fileSize, buff[rangeStart-offset:rangeStop-offset], rangeStart)
+		xn, xTsNs, xErr := section.readDataAt(ctx, group, fileSize, buff[rangeStart-offset:rangeStop-offset], rangeStart)
 		if xErr != nil {
 			return n + xn, max(tsNs, xTsNs), xErr
 		}
@@ -123,14 +123,14 @@ const (
 )
 
 // FIXME: needa tests
-func (group *ChunkGroup) SearchChunks(offset, fileSize int64, whence uint32) (found bool, out int64) {
+func (group *ChunkGroup) SearchChunks(ctx context.Context, offset, fileSize int64, whence uint32) (found bool, out int64) {
 	group.sectionsLock.RLock()
 	defer group.sectionsLock.RUnlock()
 
-	return group.doSearchChunks(offset, fileSize, whence)
+	return group.doSearchChunks(ctx, offset, fileSize, whence)
 }
 
-func (group *ChunkGroup) doSearchChunks(offset, fileSize int64, whence uint32) (found bool, out int64) {
+func (group *ChunkGroup) doSearchChunks(ctx context.Context, offset, fileSize int64, whence uint32) (found bool, out int64) {
 
 	sectionIndex, maxSectionIndex := SectionIndex(offset/SectionSize), SectionIndex(fileSize/SectionSize)
 	if whence == SEEK_DATA {
@@ -139,7 +139,7 @@ func (group *ChunkGroup) doSearchChunks(offset, fileSize int64, whence uint32) (
 			if !foundSection {
 				continue
 			}
-			sectionStart := section.DataStartOffset(group, offset, fileSize)
+			sectionStart := section.DataStartOffset(ctx, group, offset, fileSize)
 			if sectionStart == -1 {
 				continue
 			}
@@ -153,7 +153,7 @@ func (group *ChunkGroup) doSearchChunks(offset, fileSize int64, whence uint32) (
 			if !foundSection {
 				return true, offset
 			}
-			holeStart := section.NextStopOffset(group, offset, fileSize)
+			holeStart := section.NextStopOffset(ctx, group, offset, fileSize)
 			if holeStart%SectionSize == 0 {
 				continue
 			}
diff --git a/weed/filer/filechunk_group_test.go b/weed/filer/filechunk_group_test.go
index 67be83e3d..a7103ce2e 100644
--- a/weed/filer/filechunk_group_test.go
+++ b/weed/filer/filechunk_group_test.go
@@ -1,8 +1,11 @@
 package filer
 
 import (
+	"context"
+	"errors"
 	"io"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -25,7 +28,7 @@ func TestChunkGroup_ReadDataAt_ErrorHandling(t *testing.T) {
 		offset := int64(0)
 
 		// With an empty ChunkGroup, we should get no error
-		n, tsNs, err := group.ReadDataAt(fileSize, buff, offset)
+		n, tsNs, err := group.ReadDataAt(context.Background(), fileSize, buff, offset)
 
 		// Should return 100 (length of buffer) and no error since there are no sections
 		// and missing sections are filled with zeros
@@ -44,7 +47,7 @@ func TestChunkGroup_ReadDataAt_ErrorHandling(t *testing.T) {
 		fileSize := int64(50) // File smaller than buffer
 		offset := int64(0)
 
-		n, tsNs, err := group.ReadDataAt(fileSize, buff, offset)
+		n, tsNs, err := group.ReadDataAt(context.Background(), fileSize, buff, offset)
 
 		// Should return 50 (file size) and no error
 		assert.Equal(t, 50, n)
@@ -57,7 +60,7 @@ func TestChunkGroup_ReadDataAt_ErrorHandling(t *testing.T) {
 		fileSize := int64(50)
 		offset := int64(100) // Offset beyond file size
 
-		n, tsNs, err := group.ReadDataAt(fileSize, buff, offset)
+		n, tsNs, err := group.ReadDataAt(context.Background(), fileSize, buff, offset)
 
 		assert.Equal(t, 0, n)
 		assert.Equal(t, int64(0), tsNs)
@@ -80,19 +83,19 @@ func TestChunkGroup_ReadDataAt_ErrorHandling(t *testing.T) {
 		fileSize := int64(1000)
 
 		// Test 1: Normal operation with no sections (filled with zeros)
-		n, tsNs, err := group.ReadDataAt(fileSize, buff, int64(0))
+		n, tsNs, err := group.ReadDataAt(context.Background(), fileSize, buff, int64(0))
 		assert.Equal(t, 100, n, "should read full buffer")
 		assert.Equal(t, int64(0), tsNs, "timestamp should be zero for missing sections")
 		assert.NoError(t, err, "should not error for missing sections")
 
 		// Test 2: Reading beyond file size should return io.EOF immediately
-		n, tsNs, err = group.ReadDataAt(fileSize, buff, fileSize+1)
+		n, tsNs, err = group.ReadDataAt(context.Background(), fileSize, buff, fileSize+1)
 		assert.Equal(t, 0, n, "should not read any bytes when beyond file size")
 		assert.Equal(t, int64(0), tsNs, "timestamp should be zero")
 		assert.Equal(t, io.EOF, err, "should return io.EOF when reading beyond file size")
 
 		// Test 3: Reading at exact file boundary
-		n, tsNs, err = group.ReadDataAt(fileSize, buff, fileSize)
+		n, tsNs, err = group.ReadDataAt(context.Background(), fileSize, buff, fileSize)
 		assert.Equal(t, 0, n, "should not read any bytes at exact file size boundary")
 		assert.Equal(t, int64(0), tsNs, "timestamp should be zero")
 		assert.Equal(t, io.EOF, err, "should return io.EOF at file boundary")
@@ -102,6 +105,130 @@ func TestChunkGroup_ReadDataAt_ErrorHandling(t *testing.T) {
 		// This prevents later sections from masking earlier errors, especially
 		// preventing io.EOF from masking network errors or other real failures.
 	})
+
+	t.Run("Context Cancellation", func(t *testing.T) {
+		// Test 4: Context cancellation should be properly propagated through ReadDataAt
+
+		// This test verifies that the context parameter is properly threaded through
+		// the call chain and that cancellation checks are in place at the right points
+
+		// Test with a pre-cancelled context to ensure the cancellation is detected
+		ctx, cancel := context.WithCancel(context.Background())
+		cancel() // Cancel immediately
+
+		group := &ChunkGroup{
+			sections: make(map[SectionIndex]*FileChunkSection),
+		}
+
+		buff := make([]byte, 100)
+		fileSize := int64(1000)
+
+		// Call ReadDataAt with the already cancelled context
+		n, tsNs, err := group.ReadDataAt(ctx, fileSize, buff, int64(0))
+
+		// For an empty ChunkGroup (no sections), the operation will complete successfully
+		// since it just fills the buffer with zeros. However, the important thing is that
+		// the context is properly threaded through the call chain.
+		// The actual cancellation would be more evident with real chunk sections that
+		// perform network operations.
+
+		if err != nil {
+			// If an error is returned, it should be a context cancellation error
+			assert.True(t,
+				errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded),
+				"Expected context.Canceled or context.DeadlineExceeded, got: %v", err)
+		} else {
+			// If no error (operation completed before cancellation check),
+			// verify normal behavior for empty ChunkGroup
+			assert.Equal(t, 100, n, "should read full buffer size when no sections exist")
+			assert.Equal(t, int64(0), tsNs, "timestamp should be zero")
+			t.Log("Operation completed before context cancellation was checked - this is expected for empty ChunkGroup")
+		}
+	})
+
+	t.Run("Context Cancellation with Timeout", func(t *testing.T) {
+		// Test 5: Context with timeout should be respected
+
+		group := &ChunkGroup{
+			sections: make(map[SectionIndex]*FileChunkSection),
+		}
+
+		// Create a context with a very short timeout
+		ctx, cancel := context.WithTimeout(context.Background(), 1*time.Millisecond)
+		defer cancel()
+
+		buff := make([]byte, 100)
+		fileSize := int64(1000)
+
+		// This should fail due to timeout
+		n, tsNs, err := group.ReadDataAt(ctx, fileSize, buff, int64(0))
+
+		// For this simple case with no sections, it might complete before timeout
+		// But if it does timeout, we should handle it properly
+		if err != nil {
+			assert.True(t,
+				errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded),
+				"Expected context.Canceled or context.DeadlineExceeded when context times out, got: %v", err)
+		} else {
+			// If no error, verify normal behavior
+			assert.Equal(t, 100, n, "should read full buffer size when no sections exist")
+			assert.Equal(t, int64(0), tsNs, "timestamp should be zero")
+		}
+	})
+}
+
+func TestChunkGroup_SearchChunks_Cancellation(t *testing.T) {
+	t.Run("Context Cancellation in SearchChunks", func(t *testing.T) {
+		// Test that SearchChunks properly handles context cancellation
+
+		group := &ChunkGroup{
+			sections: make(map[SectionIndex]*FileChunkSection),
+		}
+
+		// Test with a pre-cancelled context
+		ctx, cancel := context.WithCancel(context.Background())
+		cancel() // Cancel immediately
+
+		fileSize := int64(1000)
+		offset := int64(0)
+		whence := uint32(3) // SEEK_DATA
+
+		// Call SearchChunks with cancelled context
+		found, resultOffset := group.SearchChunks(ctx, offset, fileSize, whence)
+
+		// For an empty ChunkGroup, SearchChunks should complete quickly
+		// The main goal is to verify the context parameter is properly threaded through
+		// In real scenarios with actual chunk sections, context cancellation would be more meaningful
+
+		// Verify the function completes and returns reasonable values
+		assert.False(t, found, "should not find data in empty chunk group")
+		assert.Equal(t, int64(0), resultOffset, "should return 0 offset when no data found")
+
+		t.Log("SearchChunks completed with cancelled context - context threading verified")
+	})
+
+	t.Run("Context with Timeout in SearchChunks", func(t *testing.T) {
+		// Test SearchChunks with a timeout context
+
+		group := &ChunkGroup{
+			sections: make(map[SectionIndex]*FileChunkSection),
+		}
+
+		// Create a context with very short timeout
+		ctx, cancel := context.WithTimeout(context.Background(), 1*time.Millisecond)
+		defer cancel()
+
+		fileSize := int64(1000)
+		offset := int64(0)
+		whence := uint32(3) // SEEK_DATA
+
+		// Call SearchChunks - should complete quickly for empty group
+		found, resultOffset := group.SearchChunks(ctx, offset, fileSize, whence)
+
+		// Verify reasonable behavior
+		assert.False(t, found, "should not find data in empty chunk group")
+		assert.Equal(t, int64(0), resultOffset, "should return 0 offset when no data found")
+	})
 }
 
 func TestChunkGroup_doSearchChunks(t *testing.T) {
@@ -127,7 +254,7 @@ func TestChunkGroup_doSearchChunks(t *testing.T) {
 			group := &ChunkGroup{
 				sections: tt.fields.sections,
 			}
-			gotFound, gotOut := group.doSearchChunks(tt.args.offset, tt.args.fileSize, tt.args.whence)
+			gotFound, gotOut := group.doSearchChunks(context.Background(), tt.args.offset, tt.args.fileSize, tt.args.whence)
 			assert.Equalf(t, tt.wantFound, gotFound, "doSearchChunks(%v, %v, %v)", tt.args.offset, tt.args.fileSize, tt.args.whence)
 			assert.Equalf(t, tt.wantOut, gotOut, "doSearchChunks(%v, %v, %v)", tt.args.offset, tt.args.fileSize, tt.args.whence)
 		})
diff --git a/weed/filer/filechunk_section.go b/weed/filer/filechunk_section.go
index 75273a1ca..76eb84c23 100644
--- a/weed/filer/filechunk_section.go
+++ b/weed/filer/filechunk_section.go
@@ -1,6 +1,7 @@
 package filer
 
 import (
+	"context"
 	"sync"
 
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
@@ -62,7 +63,7 @@ func removeGarbageChunks(section *FileChunkSection, garbageFileIds map[string]st
 	}
 }
 
-func (section *FileChunkSection) setupForRead(group *ChunkGroup, fileSize int64) {
+func (section *FileChunkSection) setupForRead(ctx context.Context, group *ChunkGroup, fileSize int64) {
 	section.lock.Lock()
 	defer section.lock.Unlock()
 
@@ -84,25 +85,25 @@ func (section *FileChunkSection) setupForRead(group *ChunkGroup, fileSize int64)
 	}
 
 	if section.reader == nil {
-		section.reader = NewChunkReaderAtFromClient(group.readerCache, section.chunkViews, min(int64(section.sectionIndex+1)*SectionSize, fileSize))
+		section.reader = NewChunkReaderAtFromClient(ctx, group.readerCache, section.chunkViews, min(int64(section.sectionIndex+1)*SectionSize, fileSize))
 	}
 
 	section.isPrepared = true
 	section.reader.fileSize = fileSize
 }
 
-func (section *FileChunkSection) readDataAt(group *ChunkGroup, fileSize int64, buff []byte, offset int64) (n int, tsNs int64, err error) {
+func (section *FileChunkSection) readDataAt(ctx context.Context, group *ChunkGroup, fileSize int64, buff []byte, offset int64) (n int, tsNs int64, err error) {
 
-	section.setupForRead(group, fileSize)
+	section.setupForRead(ctx, group, fileSize)
 	section.lock.RLock()
 	defer section.lock.RUnlock()
 
-	return section.reader.ReadAtWithTime(buff, offset)
+	return section.reader.ReadAtWithTime(ctx, buff, offset)
 }
 
-func (section *FileChunkSection) DataStartOffset(group *ChunkGroup, offset int64, fileSize int64) int64 {
+func (section *FileChunkSection) DataStartOffset(ctx context.Context, group *ChunkGroup, offset int64, fileSize int64) int64 {
 
-	section.setupForRead(group, fileSize)
+	section.setupForRead(ctx, group, fileSize)
 	section.lock.RLock()
 	defer section.lock.RUnlock()
 
@@ -119,9 +120,9 @@ func (section *FileChunkSection) DataStartOffset(group *ChunkGroup, offset int64
 	return -1
 }
 
-func (section *FileChunkSection) NextStopOffset(group *ChunkGroup, offset int64, fileSize int64) int64 {
+func (section *FileChunkSection) NextStopOffset(ctx context.Context, group *ChunkGroup, offset int64, fileSize int64) int64 {
 
-	section.setupForRead(group, fileSize)
+	section.setupForRead(ctx, group, fileSize)
 	section.lock.RLock()
 	defer section.lock.RUnlock()
 
diff --git a/weed/filer/filer_on_meta_event.go b/weed/filer/filer_on_meta_event.go
index 6cec80148..acbf4aa47 100644
--- a/weed/filer/filer_on_meta_event.go
+++ b/weed/filer/filer_on_meta_event.go
@@ -2,6 +2,7 @@ package filer
 
 import (
 	"bytes"
+
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
diff --git a/weed/filer/reader_at.go b/weed/filer/reader_at.go
index b33087777..27d773f49 100644
--- a/weed/filer/reader_at.go
+++ b/weed/filer/reader_at.go
@@ -20,6 +20,7 @@ type ChunkReadAt struct {
 	readerCache   *ReaderCache
 	readerPattern *ReaderPattern
 	lastChunkFid  string
+	ctx           context.Context // Context used for cancellation during chunk read operations
 }
 
 var _ = io.ReaderAt(&ChunkReadAt{})
@@ -87,13 +88,14 @@ func LookupFn(filerClient filer_pb.FilerClient) wdclient.LookupFileIdFunctionTyp
 	}
 }
 
-func NewChunkReaderAtFromClient(readerCache *ReaderCache, chunkViews *IntervalList[*ChunkView], fileSize int64) *ChunkReadAt {
+func NewChunkReaderAtFromClient(ctx context.Context, readerCache *ReaderCache, chunkViews *IntervalList[*ChunkView], fileSize int64) *ChunkReadAt {
 
 	return &ChunkReadAt{
 		chunkViews:    chunkViews,
 		fileSize:      fileSize,
 		readerCache:   readerCache,
 		readerPattern: NewReaderPattern(),
+		ctx:           ctx,
 	}
 }
 
@@ -114,11 +116,11 @@ func (c *ChunkReadAt) ReadAt(p []byte, offset int64) (n int, err error) {
 	defer c.chunkViews.Lock.RUnlock()
 
 	// glog.V(4).Infof("ReadAt [%d,%d) of total file size %d bytes %d chunk views", offset, offset+int64(len(p)), c.fileSize, len(c.chunkViews))
-	n, _, err = c.doReadAt(p, offset)
+	n, _, err = c.doReadAt(c.ctx, p, offset)
 	return
 }
 
-func (c *ChunkReadAt) ReadAtWithTime(p []byte, offset int64) (n int, ts int64, err error) {
+func (c *ChunkReadAt) ReadAtWithTime(ctx context.Context, p []byte, offset int64) (n int, ts int64, err error) {
 
 	c.readerPattern.MonitorReadAt(offset, len(p))
 
@@ -126,10 +128,10 @@ func (c *ChunkReadAt) ReadAtWithTime(p []byte, offset int64) (n int, ts int64, e
 	defer c.chunkViews.Lock.RUnlock()
 
 	// glog.V(4).Infof("ReadAt [%d,%d) of total file size %d bytes %d chunk views", offset, offset+int64(len(p)), c.fileSize, len(c.chunkViews))
-	return c.doReadAt(p, offset)
+	return c.doReadAt(ctx, p, offset)
 }
 
-func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, ts int64, err error) {
+func (c *ChunkReadAt) doReadAt(ctx context.Context, p []byte, offset int64) (n int, ts int64, err error) {
 
 	startOffset, remaining := offset, int64(len(p))
 	var nextChunks *Interval[*ChunkView]
@@ -158,7 +160,7 @@ func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, ts int64, err err
 		// glog.V(4).Infof("read [%d,%d), %d/%d chunk %s [%d,%d)", chunkStart, chunkStop, i, len(c.chunkViews), chunk.FileId, chunk.ViewOffset-chunk.Offset, chunk.ViewOffset-chunk.Offset+int64(chunk.ViewSize))
 		bufferOffset := chunkStart - chunk.ViewOffset + chunk.OffsetInChunk
 		ts = chunk.ModifiedTsNs
-		copied, err := c.readChunkSliceAt(p[startOffset-offset:chunkStop-chunkStart+startOffset-offset], chunk, nextChunks, uint64(bufferOffset))
+		copied, err := c.readChunkSliceAt(ctx, p[startOffset-offset:chunkStop-chunkStart+startOffset-offset], chunk, nextChunks, uint64(bufferOffset))
 		if err != nil {
 			glog.Errorf("fetching chunk %+v: %v\n", chunk, err)
 			return copied, ts, err
@@ -192,14 +194,14 @@ func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, ts int64, err err
 
 }
 
-func (c *ChunkReadAt) readChunkSliceAt(buffer []byte, chunkView *ChunkView, nextChunkViews *Interval[*ChunkView], offset uint64) (n int, err error) {
+func (c *ChunkReadAt) readChunkSliceAt(ctx context.Context, buffer []byte, chunkView *ChunkView, nextChunkViews *Interval[*ChunkView], offset uint64) (n int, err error) {
 
 	if c.readerPattern.IsRandomMode() {
 		n, err := c.readerCache.chunkCache.ReadChunkAt(buffer, chunkView.FileId, offset)
 		if n > 0 {
 			return n, err
 		}
-		return fetchChunkRange(context.Background(), buffer, c.readerCache.lookupFileIdFn, chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped, int64(offset))
+		return fetchChunkRange(ctx, buffer, c.readerCache.lookupFileIdFn, chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped, int64(offset))
 	}
 
 	shouldCache := (uint64(chunkView.ViewOffset) + chunkView.ChunkSize) <= c.readerCache.chunkCache.GetMaxFilePartSizeInCache()
diff --git a/weed/filer/reader_at_test.go b/weed/filer/reader_at_test.go
index 6d985a397..6c9041cd9 100644
--- a/weed/filer/reader_at_test.go
+++ b/weed/filer/reader_at_test.go
@@ -2,6 +2,7 @@ package filer
 
 import (
 	"bytes"
+	"context"
 	"io"
 	"math"
 	"strconv"
@@ -91,7 +92,7 @@ func testReadAt(t *testing.T, readerAt *ChunkReadAt, offset int64, size int, exp
 	if data == nil {
 		data = make([]byte, size)
 	}
-	n, _, err := readerAt.doReadAt(data, offset)
+	n, _, err := readerAt.doReadAt(context.Background(), data, offset)
 
 	if expectedN != n {
 		t.Errorf("unexpected read size: %d, expect: %d", n, expectedN)
diff --git a/weed/mount/filehandle.go b/weed/mount/filehandle.go
index f47d4a877..6cbc9745e 100644
--- a/weed/mount/filehandle.go
+++ b/weed/mount/filehandle.go
@@ -1,12 +1,13 @@
 package mount
 
 import (
+	"os"
+	"sync"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
-	"os"
-	"sync"
 )
 
 type FileHandleId uint64
diff --git a/weed/mount/filehandle_read.go b/weed/mount/filehandle_read.go
index ce5f96341..87cf76655 100644
--- a/weed/mount/filehandle_read.go
+++ b/weed/mount/filehandle_read.go
@@ -23,6 +23,10 @@ func (fh *FileHandle) readFromDirtyPages(buff []byte, startOffset int64, tsNs in
 }
 
 func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, int64, error) {
+	return fh.readFromChunksWithContext(context.Background(), buff, offset)
+}
+
+func (fh *FileHandle) readFromChunksWithContext(ctx context.Context, buff []byte, offset int64) (int64, int64, error) {
 	fh.entryLock.RLock()
 	defer fh.entryLock.RUnlock()
 
@@ -60,7 +64,7 @@ func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, int64, e
 		return int64(totalRead), 0, nil
 	}
 
-	totalRead, ts, err := fh.entryChunkGroup.ReadDataAt(fileSize, buff, offset)
+	totalRead, ts, err := fh.entryChunkGroup.ReadDataAt(ctx, fileSize, buff, offset)
 
 	if err != nil && err != io.EOF {
 		glog.Errorf("file handle read %s: %v", fileFullPath, err)
diff --git a/weed/mount/weedfs_file_lseek.go b/weed/mount/weedfs_file_lseek.go
index 0cf7ef43b..73564fdbe 100644
--- a/weed/mount/weedfs_file_lseek.go
+++ b/weed/mount/weedfs_file_lseek.go
@@ -1,9 +1,11 @@
 package mount
 
 import (
-	"github.com/seaweedfs/seaweedfs/weed/util"
+	"context"
 	"syscall"
 
+	"github.com/seaweedfs/seaweedfs/weed/util"
+
 	"github.com/hanwen/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
@@ -54,8 +56,17 @@ func (wfs *WFS) Lseek(cancel <-chan struct{}, in *fuse.LseekIn, out *fuse.LseekO
 		return ENXIO
 	}
 
+	// Create a context that will be cancelled when the cancel channel receives a signal
+	ctx, cancelFunc := context.WithCancel(context.Background())
+	go func() {
+		select {
+		case <-cancel:
+			cancelFunc()
+		}
+	}()
+
 	// search chunks for the offset
-	found, offset := fh.entryChunkGroup.SearchChunks(offset, fileSize, in.Whence)
+	found, offset := fh.entryChunkGroup.SearchChunks(ctx, offset, fileSize, in.Whence)
 	if found {
 		out.Offset = uint64(offset)
 		return fuse.OK
diff --git a/weed/mount/weedfs_file_read.go b/weed/mount/weedfs_file_read.go
index bf9c89071..dc79d3dc7 100644
--- a/weed/mount/weedfs_file_read.go
+++ b/weed/mount/weedfs_file_read.go
@@ -2,10 +2,12 @@ package mount
 
 import (
 	"bytes"
+	"context"
 	"fmt"
-	"github.com/seaweedfs/seaweedfs/weed/util"
 	"io"
 
+	"github.com/seaweedfs/seaweedfs/weed/util"
+
 	"github.com/hanwen/go-fuse/v2/fuse"
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
@@ -45,8 +47,17 @@ func (wfs *WFS) Read(cancel <-chan struct{}, in *fuse.ReadIn, buff []byte) (fuse
 	fhActiveLock := fh.wfs.fhLockTable.AcquireLock("Read", fh.fh, util.SharedLock)
 	defer fh.wfs.fhLockTable.ReleaseLock(fh.fh, fhActiveLock)
 
+	// Create a context that will be cancelled when the cancel channel receives a signal
+	ctx, cancelFunc := context.WithCancel(context.Background())
+	go func() {
+		select {
+		case <-cancel:
+			cancelFunc()
+		}
+	}()
+
 	offset := int64(in.Offset)
-	totalRead, err := readDataByFileHandle(buff, fh, offset)
+	totalRead, err := readDataByFileHandleWithContext(ctx, buff, fh, offset)
 	if err != nil {
 		glog.Warningf("file handle read %s %d: %v", fh.FullPath(), totalRead, err)
 		return nil, fuse.EIO
@@ -59,7 +70,7 @@ func (wfs *WFS) Read(cancel <-chan struct{}, in *fuse.ReadIn, buff []byte) (fuse
 		if bytes.Compare(mirrorData, buff[:totalRead]) != 0 {
 
 			againBuff := make([]byte, len(buff))
-			againRead, _ := readDataByFileHandle(againBuff, fh, offset)
+			againRead, _ := readDataByFileHandleWithContext(ctx, againBuff, fh, offset)
 			againCorrect := bytes.Compare(mirrorData, againBuff[:againRead]) == 0
 			againSame := bytes.Compare(buff[:totalRead], againBuff[:againRead]) == 0
 
@@ -88,3 +99,20 @@ func readDataByFileHandle(buff []byte, fhIn *FileHandle, offset int64) (int64, e
 	}
 	return n, err
 }
+
+func readDataByFileHandleWithContext(ctx context.Context, buff []byte, fhIn *FileHandle, offset int64) (int64, error) {
+	// read data from source file
+	size := len(buff)
+	fhIn.lockForRead(offset, size)
+	defer fhIn.unlockForRead(offset, size)
+
+	n, tsNs, err := fhIn.readFromChunksWithContext(ctx, buff, offset)
+	if err == nil || err == io.EOF {
+		maxStop := fhIn.readFromDirtyPages(buff, offset, tsNs)
+		n = max(maxStop-offset, n)
+	}
+	if err == io.EOF {
+		err = nil
+	}
+	return n, err
+}
diff --git a/weed/mq/logstore/read_parquet_to_log.go b/weed/mq/logstore/read_parquet_to_log.go
index a64779520..2c0b66891 100644
--- a/weed/mq/logstore/read_parquet_to_log.go
+++ b/weed/mq/logstore/read_parquet_to_log.go
@@ -55,7 +55,7 @@ func GenParquetReadFunc(filerClient filer_pb.FilerClient, t topic.Topic, p topic
 		visibleIntervals, _ := filer.NonOverlappingVisibleIntervals(context.Background(), lookupFileIdFn, entry.Chunks, 0, int64(fileSize))
 		chunkViews := filer.ViewFromVisibleIntervals(visibleIntervals, 0, int64(fileSize))
 		readerCache := filer.NewReaderCache(32, chunkCache, lookupFileIdFn)
-		readerAt := filer.NewChunkReaderAtFromClient(readerCache, chunkViews, int64(fileSize))
+		readerAt := filer.NewChunkReaderAtFromClient(context.Background(), readerCache, chunkViews, int64(fileSize))
 
 		// create parquet reader
 		parquetReader := parquet.NewReader(readerAt)
diff --git a/weed/server/webdav_server.go b/weed/server/webdav_server.go
index aa501b408..aa43189f5 100644
--- a/weed/server/webdav_server.go
+++ b/weed/server/webdav_server.go
@@ -3,13 +3,14 @@ package weed_server
 import (
 	"context"
 	"fmt"
-	"github.com/seaweedfs/seaweedfs/weed/util/version"
 	"io"
 	"os"
 	"path"
 	"strings"
 	"time"
 
+	"github.com/seaweedfs/seaweedfs/weed/util/version"
+
 	"github.com/seaweedfs/seaweedfs/weed/util/buffered_writer"
 	"golang.org/x/net/webdav"
 	"google.golang.org/grpc"
@@ -126,6 +127,7 @@ type WebDavFile struct {
 	visibleIntervals *filer.IntervalList[*filer.VisibleInterval]
 	reader           io.ReaderAt
 	bufWriter        *buffered_writer.BufferedWriteCloser
+	ctx              context.Context
 }
 
 func NewWebDavFileSystem(option *WebDavOption) (webdav.FileSystem, error) {
@@ -269,6 +271,7 @@ func (fs *WebDavFileSystem) OpenFile(ctx context.Context, fullFilePath string, f
 			name:        fullFilePath,
 			isDirectory: false,
 			bufWriter:   buffered_writer.NewBufferedWriteCloser(fs.option.MaxMB * 1024 * 1024),
+			ctx:         ctx,
 		}, nil
 	}
 
@@ -277,7 +280,7 @@ func (fs *WebDavFileSystem) OpenFile(ctx context.Context, fullFilePath string, f
 		if err == os.ErrNotExist {
 			return nil, err
 		}
-		return &WebDavFile{fs: fs}, nil
+		return &WebDavFile{fs: fs, ctx: ctx}, nil
 	}
 	if !strings.HasSuffix(fullFilePath, "/") && fi.IsDir() {
 		fullFilePath += "/"
@@ -288,6 +291,7 @@ func (fs *WebDavFileSystem) OpenFile(ctx context.Context, fullFilePath string, f
 		name:        fullFilePath,
 		isDirectory: false,
 		bufWriter:   buffered_writer.NewBufferedWriteCloser(fs.option.MaxMB * 1024 * 1024),
+		ctx:         ctx,
 	}, nil
 
 }
@@ -557,12 +561,12 @@ func (f *WebDavFile) Read(p []byte) (readSize int, err error) {
 		return 0, io.EOF
 	}
 	if f.visibleIntervals == nil {
-		f.visibleIntervals, _ = filer.NonOverlappingVisibleIntervals(context.Background(), filer.LookupFn(f.fs), f.entry.GetChunks(), 0, fileSize)
+		f.visibleIntervals, _ = filer.NonOverlappingVisibleIntervals(f.ctx, filer.LookupFn(f.fs), f.entry.GetChunks(), 0, fileSize)
 		f.reader = nil
 	}
 	if f.reader == nil {
 		chunkViews := filer.ViewFromVisibleIntervals(f.visibleIntervals, 0, fileSize)
-		f.reader = filer.NewChunkReaderAtFromClient(f.fs.readerCache, chunkViews, fileSize)
+		f.reader = filer.NewChunkReaderAtFromClient(f.ctx, f.fs.readerCache, chunkViews, fileSize)
 	}
 
 	readSize, err = f.reader.ReadAt(p, f.off)
diff --git a/weed/shell/command_fs_cat.go b/weed/shell/command_fs_cat.go
index cf1395a2f..facb126b8 100644
--- a/weed/shell/command_fs_cat.go
+++ b/weed/shell/command_fs_cat.go
@@ -3,10 +3,11 @@ package shell
 import (
 	"context"
 	"fmt"
+	"io"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
-	"io"
 )
 
 func init() {