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tweak

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This commit is contained in:
JackDoan
2025-11-11 17:00:40 -06:00
parent cd30e5aa01
commit 400fdace9d
4 changed files with 19 additions and 35 deletions
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8
overlay/virtqueue/descriptor_table.go
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@@ -349,7 +349,7 @@ func (dt *DescriptorTable) getDescriptorChain(head uint16) (outBuffers, inBuffer
return
}
func (dt *DescriptorTable) getDescriptorChainContents(head uint16, out []byte) (int, error) {
func (dt *DescriptorTable) getDescriptorChainContents(head uint16, out []byte, maxLen int) (int, error) {
if int(head) > len(dt.descriptors) {
return 0, fmt.Errorf("%w: index out of range", ErrInvalidDescriptorChain)
}
@@ -387,7 +387,9 @@ func (dt *DescriptorTable) getDescriptorChainContents(head uint16, out []byte) (
next = desc.next
}
if maxLen > 0 {
//todo length = min(maxLen, length)
}
//set out to length:
out = out[:length]
@@ -399,7 +401,7 @@ func (dt *DescriptorTable) getDescriptorChainContents(head uint16, out []byte) (
// The descriptor address points to memory not managed by Go, so this
// conversion is safe. See https://github.com/golang/go/issues/58625
//goland:noinspection GoVetUnsafePointer
bs := unsafe.Slice((*byte)(unsafe.Pointer(desc.address)), desc.length)
bs := unsafe.Slice((*byte)(unsafe.Pointer(desc.address)), min(uint32(length-copied), desc.length))
copied += copy(out[copied:], bs)
// Is this the tail of the chain?