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| author | Valentin Rothberg <rothberg@redhat.com> | 2021-03-02 09:20:53 +0100 |
|---|---|---|
| committer | Valentin Rothberg <rothberg@redhat.com> | 2021-03-04 15:43:12 +0100 |
| commit | a090301bbb10424ce4f99e40c97959f0e8664718 (patch) | |
| tree | 3b2596e3d152204d35162b1ca89f524c5803ad8c /pkg/domain/entities/containers.go | |
| parent | 833670079c5b1f95fbb7c9bb8ba9095f1c66c7b4 (diff) | |
| download | podman-a090301bbb10424ce4f99e40c97959f0e8664718.tar.gz podman-a090301bbb10424ce4f99e40c97959f0e8664718.tar.bz2 podman-a090301bbb10424ce4f99e40c97959f0e8664718.zip | |
podman cp: support copying on tmpfs mounts
Traditionally, the path resolution for containers has been resolved on
the *host*; relative to the container's mount point or relative to
specified bind mounts or volumes.
While this works nicely for non-running containers, it poses a problem
for running ones. In that case, certain kinds of mounts (e.g., tmpfs)
will not resolve correctly. A tmpfs is held in memory and hence cannot
be resolved relatively to the container's mount point. A copy operation
will succeed but the data will not show up inside the container.
To support these kinds of mounts, we need to join the *running*
container's mount namespace (and PID namespace) when copying.
Note that this change implies moving the copy and stat logic into
`libpod` since we need to keep the container locked to avoid race
conditions. The immediate benefit is that all logic is now inside
`libpod`; the code isn't scattered anymore.
Further note that Docker does not support copying to tmpfs mounts.
Tests have been extended to cover *both* path resolutions for running
and created containers. New tests have been added to exercise the
tmpfs-mount case.
For the record: Some tests could be improved by using `start -a` instead
of a start-exec sequence. Unfortunately, `start -a` is flaky in the CI
which forced me to use the more expensive start-exec option.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'pkg/domain/entities/containers.go')
| -rw-r--r-- | pkg/domain/entities/containers.go | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go index ac965834a..7d074f89d 100644 --- a/pkg/domain/entities/containers.go +++ b/pkg/domain/entities/containers.go @@ -8,7 +8,6 @@ import ( "github.com/containers/image/v5/types" "github.com/containers/podman/v3/libpod/define" - "github.com/containers/podman/v3/pkg/copy" "github.com/containers/podman/v3/pkg/specgen" "github.com/cri-o/ocicni/pkg/ocicni" ) @@ -145,7 +144,7 @@ type ContainerInspectReport struct { } type ContainerStatReport struct { - copy.FileInfo + define.FileInfo } type CommitOptions struct { |