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authorOpenShift Merge Robot <openshift-merge-robot@users.noreply.github.com>2021-01-26 16:59:57 +0100
committerGitHub <noreply@github.com>2021-01-26 16:59:57 +0100
commitad1e0bb77f56499ff22eeb8123aaab8e57a43c03 (patch)
tree2d51bab04ef8f221273d3f9d18aceb847daf5dc1 /pkg/domain
parent41dd1eb8a22f6ac70dd48b53993c9d6ce4476eb4 (diff)
parent0f668aa0857815f388ef1bb880efa4b2e889edaf (diff)
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Merge pull request #9054 from vrothberg/fix-9040
make sure the workdir exists on container mount
Diffstat (limited to 'pkg/domain')
-rw-r--r--pkg/domain/infra/abi/archive.go14
-rw-r--r--pkg/domain/infra/abi/containers_stat.go140
2 files changed, 20 insertions, 134 deletions
diff --git a/pkg/domain/infra/abi/archive.go b/pkg/domain/infra/abi/archive.go
index 809813756..c64dfb02a 100644
--- a/pkg/domain/infra/abi/archive.go
+++ b/pkg/domain/infra/abi/archive.go
@@ -26,13 +26,18 @@ func (ic *ContainerEngine) ContainerCopyFromArchive(ctx context.Context, nameOrI
return nil, err
}
+ containerMountPoint, err := container.Mount()
+ if err != nil {
+ return nil, err
+ }
+
unmount := func() {
if err := container.Unmount(false); err != nil {
logrus.Errorf("Error unmounting container: %v", err)
}
}
- _, resolvedRoot, resolvedContainerPath, err := ic.containerStat(container, containerPath)
+ _, resolvedRoot, resolvedContainerPath, err := ic.containerStat(container, containerMountPoint, containerPath)
if err != nil {
unmount()
return nil, err
@@ -71,6 +76,11 @@ func (ic *ContainerEngine) ContainerCopyToArchive(ctx context.Context, nameOrID
return nil, err
}
+ containerMountPoint, err := container.Mount()
+ if err != nil {
+ return nil, err
+ }
+
unmount := func() {
if err := container.Unmount(false); err != nil {
logrus.Errorf("Error unmounting container: %v", err)
@@ -83,7 +93,7 @@ func (ic *ContainerEngine) ContainerCopyToArchive(ctx context.Context, nameOrID
containerPath = "/."
}
- _, resolvedRoot, resolvedContainerPath, err := ic.containerStat(container, containerPath)
+ _, resolvedRoot, resolvedContainerPath, err := ic.containerStat(container, containerMountPoint, containerPath)
if err != nil {
unmount()
return nil, err
diff --git a/pkg/domain/infra/abi/containers_stat.go b/pkg/domain/infra/abi/containers_stat.go
index 931e77026..f3d0799a0 100644
--- a/pkg/domain/infra/abi/containers_stat.go
+++ b/pkg/domain/infra/abi/containers_stat.go
@@ -10,18 +10,11 @@ import (
"github.com/containers/podman/v2/libpod"
"github.com/containers/podman/v2/pkg/copy"
"github.com/containers/podman/v2/pkg/domain/entities"
- securejoin "github.com/cyphar/filepath-securejoin"
- "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
-func (ic *ContainerEngine) containerStat(container *libpod.Container, containerPath string) (*entities.ContainerStatReport, string, string, error) {
- containerMountPoint, err := container.Mount()
- if err != nil {
- return nil, "", "", err
- }
-
+func (ic *ContainerEngine) containerStat(container *libpod.Container, containerMountPoint string, containerPath string) (*entities.ContainerStatReport, string, string, error) {
// Make sure that "/" copies the *contents* of the mount point and not
// the directory.
if containerPath == "/" {
@@ -30,7 +23,7 @@ func (ic *ContainerEngine) containerStat(container *libpod.Container, containerP
// Now resolve the container's path. It may hit a volume, it may hit a
// bind mount, it may be relative.
- resolvedRoot, resolvedContainerPath, err := resolveContainerPaths(container, containerMountPoint, containerPath)
+ resolvedRoot, resolvedContainerPath, err := container.ResolvePath(context.Background(), containerMountPoint, containerPath)
if err != nil {
return nil, "", "", err
}
@@ -94,138 +87,21 @@ func (ic *ContainerEngine) ContainerStat(ctx context.Context, nameOrID string, c
return nil, err
}
+ containerMountPoint, err := container.Mount()
+ if err != nil {
+ return nil, err
+ }
+
defer func() {
if err := container.Unmount(false); err != nil {
logrus.Errorf("Error unmounting container: %v", err)
}
}()
- statReport, _, _, err := ic.containerStat(container, containerPath)
+ statReport, _, _, err := ic.containerStat(container, containerMountPoint, containerPath)
return statReport, err
}
-// resolveContainerPaths resolves the container's mount point and the container
-// path as specified by the user. Both may resolve to paths outside of the
-// container's mount point when the container path hits a volume or bind mount.
-//
-// NOTE: We must take volumes and bind mounts into account as, regrettably, we
-// can copy to/from stopped containers. In that case, the volumes and bind
-// mounts are not present. For running containers, the runtime (e.g., runc or
-// crun) takes care of these mounts. For stopped ones, we need to do quite
-// some dance, as done below.
-func resolveContainerPaths(container *libpod.Container, mountPoint string, containerPath string) (string, string, error) {
- // Let's first make sure we have a path relative to the mount point.
- pathRelativeToContainerMountPoint := containerPath
- if !filepath.IsAbs(containerPath) {
- // If the containerPath is not absolute, it's relative to the
- // container's working dir. To be extra careful, let's first
- // join the working dir with "/", and the add the containerPath
- // to it.
- pathRelativeToContainerMountPoint = filepath.Join(filepath.Join("/", container.WorkingDir()), containerPath)
- }
- resolvedPathOnTheContainerMountPoint := filepath.Join(mountPoint, pathRelativeToContainerMountPoint)
- pathRelativeToContainerMountPoint = strings.TrimPrefix(pathRelativeToContainerMountPoint, mountPoint)
- pathRelativeToContainerMountPoint = filepath.Join("/", pathRelativeToContainerMountPoint)
-
- // Now we have an "absolute container Path" but not yet resolved on the
- // host (e.g., "/foo/bar/file.txt"). As mentioned above, we need to
- // check if "/foo/bar/file.txt" is on a volume or bind mount. To do
- // that, we need to walk *down* the paths to the root. Assuming
- // volume-1 is mounted to "/foo" and volume-2 is mounted to "/foo/bar",
- // we must select "/foo/bar". Once selected, we need to rebase the
- // remainder (i.e, "/file.txt") on the volume's mount point on the
- // host. Same applies to bind mounts.
-
- searchPath := pathRelativeToContainerMountPoint
- for {
- volume, err := findVolume(container, searchPath)
- if err != nil {
- return "", "", err
- }
- if volume != nil {
- logrus.Debugf("Container path %q resolved to volume %q on path %q", containerPath, volume.Name(), searchPath)
-
- // TODO: We really need to force the volume to mount
- // before doing this, but that API is not exposed
- // externally right now and doing so is beyond the scope
- // of this commit.
- mountPoint, err := volume.MountPoint()
- if err != nil {
- return "", "", err
- }
- if mountPoint == "" {
- return "", "", errors.Errorf("volume %s is not mounted, cannot copy into it", volume.Name())
- }
-
- // We found a matching volume for searchPath. We now
- // need to first find the relative path of our input
- // path to the searchPath, and then join it with the
- // volume's mount point.
- pathRelativeToVolume := strings.TrimPrefix(pathRelativeToContainerMountPoint, searchPath)
- absolutePathOnTheVolumeMount, err := securejoin.SecureJoin(mountPoint, pathRelativeToVolume)
- if err != nil {
- return "", "", err
- }
- return mountPoint, absolutePathOnTheVolumeMount, nil
- }
-
- if mount := findBindMount(container, searchPath); mount != nil {
- logrus.Debugf("Container path %q resolved to bind mount %q:%q on path %q", containerPath, mount.Source, mount.Destination, searchPath)
- // We found a matching bind mount for searchPath. We
- // now need to first find the relative path of our
- // input path to the searchPath, and then join it with
- // the source of the bind mount.
- pathRelativeToBindMount := strings.TrimPrefix(pathRelativeToContainerMountPoint, searchPath)
- absolutePathOnTheBindMount, err := securejoin.SecureJoin(mount.Source, pathRelativeToBindMount)
- if err != nil {
- return "", "", err
- }
- return mount.Source, absolutePathOnTheBindMount, nil
-
- }
-
- if searchPath == "/" {
- // Cannot go beyond "/", so we're done.
- break
- }
-
- // Walk *down* the path (e.g., "/foo/bar/x" -> "/foo/bar").
- searchPath = filepath.Dir(searchPath)
- }
-
- // No volume, no bind mount but just a normal path on the container.
- return mountPoint, resolvedPathOnTheContainerMountPoint, nil
-}
-
-// findVolume checks if the specified container path matches a volume inside
-// the container. It returns a matching volume or nil.
-func findVolume(c *libpod.Container, containerPath string) (*libpod.Volume, error) {
- runtime := c.Runtime()
- cleanedContainerPath := filepath.Clean(containerPath)
- for _, vol := range c.Config().NamedVolumes {
- if cleanedContainerPath == filepath.Clean(vol.Dest) {
- return runtime.GetVolume(vol.Name)
- }
- }
- return nil, nil
-}
-
-// findBindMount checks if the specified container path matches a bind mount
-// inside the container. It returns a matching mount or nil.
-func findBindMount(c *libpod.Container, containerPath string) *specs.Mount {
- cleanedPath := filepath.Clean(containerPath)
- for _, m := range c.Config().Spec.Mounts {
- if m.Type != "bind" {
- continue
- }
- if cleanedPath == filepath.Clean(m.Destination) {
- mount := m
- return &mount
- }
- }
- return nil
-}
-
// secureStat extracts file info for path in a chroot'ed environment in root.
func secureStat(root string, path string) (*buildahCopiah.StatForItem, error) {
var glob string