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[#1451] placement: Return copy of slice from container nodes cache

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Nodes from cache could be changed by traverser, if no objectID specified.
So it is required to return copy of cache's slice.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
This commit is contained in:
Dmitrii Stepanov 2024-10-29 12:39:50 +03:00 committed by Evgenii Stratonikov
parent 3cf6ea745d
commit 7edec9193c
1 changed files with 11 additions and 2 deletions
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13
pkg/services/object_manager/placement/cache.go
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@ -3,6 +3,7 @@ package placement
import (
"crypto/sha256"
"fmt"
"slices"
"sync"
cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@ -44,7 +45,7 @@ func (c *ContainerNodesCache) ContainerNodes(nm *netmapSDK.NetMap, cnr cid.ID, p
raw, ok := c.containerCache.Get(cnr)
c.mtx.Unlock()
if ok {
return raw, nil
return c.cloneResult(raw), nil
}
} else {
c.lastEpoch = nm.Epoch()
@ -65,5 +66,13 @@ func (c *ContainerNodesCache) ContainerNodes(nm *netmapSDK.NetMap, cnr cid.ID, p
c.containerCache.Add(cnr, cn)
}
c.mtx.Unlock()
return cn, nil
return c.cloneResult(cn), nil
}
func (c *ContainerNodesCache) cloneResult(nodes [][]netmapSDK.NodeInfo) [][]netmapSDK.NodeInfo {
result := make([][]netmapSDK.NodeInfo, len(nodes))
for repIdx := range nodes {
result[repIdx] = slices.Clone(nodes[repIdx])
}
return result
}