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bf541c6740
I'm hitting a bug with 9p when trying to transfer large files. In RHEL at least 9p isn't supported because it's known to have a lot of design flaws; virtiofsd is the supported and recommended way to share files between a host and guest. Add a new hidden `PODMAN_MACHINE_VIRTFS` environment variable that can be set to `virtiofs` to switch to virtiofsd. Signed-off-by: Colin Walters <walters@verbum.org>
79 lines
1.7 KiB
Go
79 lines
1.7 KiB
Go
package machine
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import (
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"crypto/sha256"
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"encoding/hex"
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"github.com/containers/podman/v5/pkg/machine/vmconfigs"
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)
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// NFSSELinuxContext is what is used by NFS mounts, which is allowed
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// access by container_t. We need to fix the Fedora selinux policy
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// to just allow access to virtiofs_t.
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const NFSSELinuxContext = "system_u:object_r:nfs_t:s0"
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type Volume interface {
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Kind() VolumeKind
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}
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type VolumeKind string
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var (
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VirtIOFsVk VolumeKind = "virtiofs"
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NinePVk VolumeKind = "9p"
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)
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type VirtIoFs struct {
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VolumeKind
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ReadOnly bool
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Source string
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Tag string
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Target string
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}
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func (v VirtIoFs) Kind() string {
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return string(VirtIOFsVk)
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}
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// generateTag generates a tag for VirtIOFs mounts.
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// AppleHV requires tags to be 36 bytes or fewer.
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// SHA256 the path, then truncate to 36 bytes
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func (v VirtIoFs) generateTag() string {
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sum := sha256.Sum256([]byte(v.Target))
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stringSum := hex.EncodeToString(sum[:])
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return stringSum[:36]
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}
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func (v VirtIoFs) ToMount() vmconfigs.Mount {
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return vmconfigs.Mount{
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ReadOnly: v.ReadOnly,
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Source: v.Source,
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Tag: v.Tag,
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Target: v.Target,
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Type: v.Kind(),
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}
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}
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// NewVirtIoFsMount describes a machine volume mount for virtio-fs. With virtio-fs
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// the source/target are described as a "shared dir". With this style of volume mount
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// the Tag is used as the descriptor value for the mount (in Linux).
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func NewVirtIoFsMount(src, target string, readOnly bool) VirtIoFs {
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vfs := VirtIoFs{
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ReadOnly: readOnly,
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Source: src,
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Target: target,
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}
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vfs.Tag = vfs.generateTag()
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return vfs
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}
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func MountToVirtIOFs(mnt *vmconfigs.Mount) VirtIoFs {
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return VirtIoFs{
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VolumeKind: VirtIOFsVk,
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ReadOnly: mnt.ReadOnly,
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Source: mnt.Source,
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Tag: mnt.Tag,
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Target: mnt.Target,
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}
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}
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