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author | Valentin Rothberg <rothberg@redhat.com> | 2019-01-08 14:52:57 +0100 |
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committer | Valentin Rothberg <rothberg@redhat.com> | 2019-01-11 13:38:11 +0100 |
commit | bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87 (patch) | |
tree | 5f06e4e289f16d9164d692590a3fe6541b5384cf /vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go | |
parent | 545f24421247c9f6251a634764db3f8f8070a812 (diff) | |
download | podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.tar.gz podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.tar.bz2 podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.zip |
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.go | 40 |
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 new file mode 100644 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 +} |