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authorValentin Rothberg <rothberg@redhat.com>2019-01-08 14:52:57 +0100
committerValentin Rothberg <rothberg@redhat.com>2019-01-11 13:38:11 +0100
commitbd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87 (patch)
tree5f06e4e289f16d9164d692590a3fe6541b5384cf /vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go
parent545f24421247c9f6251a634764db3f8f8070a812 (diff)
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vendor: update everything
* If possible, update each dependency to the latest available version. * Use releases over commit IDs and avoid vendoring branches. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go')
-rw-r--r--vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go40
1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go
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index 000000000..bd4005dc4
--- /dev/null
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go
@@ -0,0 +1,40 @@
+package wclayer
+
+import (
+ "sync"
+
+ "github.com/Microsoft/hcsshim/internal/hcserror"
+ "github.com/sirupsen/logrus"
+)
+
+var prepareLayerLock sync.Mutex
+
+// PrepareLayer finds a mounted read-write layer matching path and enables the
+// the filesystem filter for use on that layer. This requires the paths to all
+// parent layers, and is necessary in order to view or interact with the layer
+// as an actual filesystem (reading and writing files, creating directories, etc).
+// Disabling the filter must be done via UnprepareLayer.
+func PrepareLayer(path string, parentLayerPaths []string) error {
+ title := "hcsshim::PrepareLayer "
+ logrus.Debugf(title+"path %s", path)
+
+ // Generate layer descriptors
+ layers, err := layerPathsToDescriptors(parentLayerPaths)
+ if err != nil {
+ return err
+ }
+
+ // This lock is a temporary workaround for a Windows bug. Only allowing one
+ // call to prepareLayer at a time vastly reduces the chance of a timeout.
+ prepareLayerLock.Lock()
+ defer prepareLayerLock.Unlock()
+ err = prepareLayer(&stdDriverInfo, path, layers)
+ if err != nil {
+ err = hcserror.Errorf(err, title, "path=%s", path)
+ logrus.Error(err)
+ return err
+ }
+
+ logrus.Debugf(title+"succeeded path=%s", path)
+ return nil
+}