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Make mounts ReadWrite first, then later change to ReadOnly.

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This lets us create "synthetic" mountpoint directories in ReadOnly mounts
during VFS setup.

Also add context.WithMountNamespace, as some filesystems (like overlay) require
a MountNamespace on ctx to handle vfs.Filesystem Operations.

PiperOrigin-RevId: 327874971
This commit is contained in:
Nicolas Lacasse
2020-08-21 14:30:03 -07:00
committed by gVisor bot
parent c9e752b644
commit 5ec3d4ed3e
8 changed files with 83 additions and 27 deletions
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pkg/sentry/fsimpl/devtmpfs/devtmpfs_test.go
+1 -1
View File
@@ -63,7 +63,7 @@ func setupDevtmpfs(t *testing.T) (context.Context, *auth.Credentials, *vfs.Virtu
}); err != nil {
t.Fatalf("failed to create mount point: %v", err)
}
if err := vfsObj.MountAt(ctx, creds, "devtmpfs" /* source */, &devpop, "devtmpfs" /* fsTypeName */, &vfs.MountOptions{}); err != nil {
if _, err := vfsObj.MountAt(ctx, creds, "devtmpfs" /* source */, &devpop, "devtmpfs" /* fsTypeName */, &vfs.MountOptions{}); err != nil {
t.Fatalf("failed to mount devtmpfs: %v", err)
}