1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
package daemon
import (
"context"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/system"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/internal/capabilities"
"github.com/opencontainers/runtime-spec/specs-go"
)
var deviceDrivers = map[string]*deviceDriver{}
type deviceListing struct {
Devices []system.DeviceInfo
Warnings []string
}
type deviceDriver struct {
capset capabilities.Set
updateSpec func(*specs.Spec, *deviceInstance) error
// ListDevices returns a list of discoverable devices provided by this
// driver, any warnings encountered during the discovery, and an error if
// the overall listing operation failed.
// Can be nil if the driver does not provide a device listing.
ListDevices func(ctx context.Context, cfg *config.Config) (deviceListing, error)
}
type deviceInstance struct {
req container.DeviceRequest
selectedCaps []string
}
func registerDeviceDriver(name string, d *deviceDriver) {
deviceDrivers[name] = d
}
func (daemon *Daemon) handleDevice(req container.DeviceRequest, spec *specs.Spec) error {
if req.Driver == "" {
for _, dd := range deviceDrivers {
if selected := dd.capset.Match(req.Capabilities); selected != nil {
return dd.updateSpec(spec, &deviceInstance{req: req, selectedCaps: selected})
}
}
} else if dd := deviceDrivers[req.Driver]; dd != nil {
// We add a special case for the CDI driver here as the cdi driver does
// not distinguish between capabilities.
// Furthermore, the "OR" and "AND" matching logic for the capability
// sets requires that a dummy capability be specified when constructing a
// DeviceRequest.
// This workaround can be removed once these device driver are
// refactored to be plugins, with each driver implementing its own
// matching logic, for example.
if req.Driver == "cdi" {
return dd.updateSpec(spec, &deviceInstance{req: req})
}
if selected := dd.capset.Match(req.Capabilities); selected != nil {
return dd.updateSpec(spec, &deviceInstance{req: req, selectedCaps: selected})
}
}
return incompatibleDeviceRequest{req.Driver, req.Capabilities}
}
|
