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Diffstat (limited to 'vendor/github.com/container-orchestrated-devices/container-device-interface')
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diff --git a/vendor/github.com/container-orchestrated-devices/container-device-interface/LICENSE b/vendor/github.com/container-orchestrated-devices/container-device-interface/LICENSE new file mode 100644 index 000000000..261eeb9e9 --- /dev/null +++ b/vendor/github.com/container-orchestrated-devices/container-device-interface/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/container-orchestrated-devices/container-device-interface/pkg/devices.go b/vendor/github.com/container-orchestrated-devices/container-device-interface/pkg/devices.go new file mode 100644 index 000000000..e66fd36c0 --- /dev/null +++ b/vendor/github.com/container-orchestrated-devices/container-device-interface/pkg/devices.go @@ -0,0 +1,180 @@ +package pkg + +import ( + "encoding/json" + "fmt" + "io/ioutil" + "os" + "path/filepath" + "strings" + + cdispec "github.com/container-orchestrated-devices/container-device-interface/specs-go" + spec "github.com/opencontainers/runtime-spec/specs-go" +) + +const ( + root = "/etc/cdi" +) + +func collectCDISpecs() (map[string]*cdispec.Spec, error) { + var files []string + vendor := make(map[string]*cdispec.Spec) + + err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error { + if info == nil || info.IsDir() { + return nil + } + + if filepath.Ext(path) != ".json" { + return nil + } + + files = append(files, path) + return nil + }) + + if err != nil { + return nil, err + } + + for _, path := range files { + spec, err := loadCDIFile(path) + if err != nil { + continue + } + + if _, ok := vendor[spec.Kind]; ok { + continue + } + + vendor[spec.Kind] = spec + } + + return vendor, nil +} + +// TODO: Validate (e.g: duplicate device names) +func loadCDIFile(path string) (*cdispec.Spec, error) { + file, err := ioutil.ReadFile(path) + if err != nil { + return nil, err + } + + var spec *cdispec.Spec + err = json.Unmarshal([]byte(file), &spec) + if err != nil { + return nil, err + } + + return spec, nil +} + +/* +* Pattern "vendor.com/device=myDevice" with the vendor being optional + */ +func extractVendor(dev string) (string, string) { + if strings.IndexByte(dev, '=') == -1 { + return "", dev + } + + split := strings.SplitN(dev, "=", 2) + return split[0], split[1] +} + +// GetCDIForDevice returns the CDI specification that matches the device name the user provided. +func GetCDIForDevice(dev string, specs map[string]*cdispec.Spec) (*cdispec.Spec, error) { + vendor, device := extractVendor(dev) + + if vendor != "" { + s, ok := specs[vendor] + if !ok { + return nil, fmt.Errorf("Could not find vendor %q for device %q", vendor, device) + } + + for _, d := range s.Devices { + if d.Name != device { + continue + } + + return s, nil + } + + return nil, fmt.Errorf("Could not find device %q for vendor %q", device, vendor) + } + + var found []*cdispec.Spec + var vendors []string + for vendor, spec := range specs { + + for _, d := range spec.Devices { + if d.Name != device { + continue + } + + found = append(found, spec) + vendors = append(vendors, vendor) + } + } + + if len(found) > 1 { + return nil, fmt.Errorf("%q is ambiguous and currently refers to multiple devices from different vendors: %q", dev, vendors) + } + + if len(found) == 1 { + return found[0], nil + } + + return nil, fmt.Errorf("Could not find device %q", dev) +} + +// HasDevice returns true if a device is a CDI device +// an error may be returned in cases where permissions may be required +func HasDevice(dev string) (bool, error) { + specs, err := collectCDISpecs() + if err != nil { + return false, err + } + + d, err := GetCDIForDevice(dev, specs) + if err != nil { + return false, err + } + + return d != nil, nil +} + +// UpdateOCISpecForDevices updates the given OCI spec based on the requested CDI devices +func UpdateOCISpecForDevices(ociconfig *spec.Spec, devs []string) error { + specs, err := collectCDISpecs() + if err != nil { + return err + } + + return UpdateOCISpecForDevicesWithSpec(ociconfig, devs, specs) +} + +// UpdateOCISpecForDevicesWithLoggerAndSpecs is mainly used for testing +func UpdateOCISpecForDevicesWithSpec(ociconfig *spec.Spec, devs []string, specs map[string]*cdispec.Spec) error { + edits := make(map[string]*cdispec.Spec) + + for _, d := range devs { + spec, err := GetCDIForDevice(d, specs) + if err != nil { + return err + } + + edits[spec.Kind] = spec + err = cdispec.ApplyOCIEditsForDevice(ociconfig, spec, d) + if err != nil { + return err + } + } + + for _, spec := range edits { + if err := cdispec.ApplyOCIEdits(ociconfig, spec); err != nil { + return err + } + } + + return nil +} diff --git a/vendor/github.com/container-orchestrated-devices/container-device-interface/specs-go/config.go b/vendor/github.com/container-orchestrated-devices/container-device-interface/specs-go/config.go new file mode 100644 index 000000000..0223bb703 --- /dev/null +++ b/vendor/github.com/container-orchestrated-devices/container-device-interface/specs-go/config.go @@ -0,0 +1,50 @@ +package specs + +// Spec is the base configuration for CDI +type Spec struct { + Version string `json:"cdiVersion"` + Kind string `json:"kind"` + KindShort []string `json:"kindShort,omitempty"` + ContainerRuntime []string `json:"containerRuntime,omitempty"` + + Devices []Devices `json:"devices"` + ContainerEdits ContainerEdits `json:"containerEdits,omitempty"` +} + +// Devices is a "Device" a container runtime can add to a container +type Devices struct { + Name string `json:"name"` + NameShort []string `json:"nameShort"` + ContainerEdits ContainerEdits `json:"containerEdits"` +} + +// ContainerEdits are edits a container runtime must make to the OCI spec to expose the device. +type ContainerEdits struct { + Env []string `json:"env,omitempty"` + DeviceNodes []*DeviceNode `json:"deviceNodes,omitempty"` + Hooks []*Hook `json:"hooks,omitempty"` + Mounts []*Mount `json:"mounts,omitempty"` +} + +// DeviceNode represents a device node that needs to be added to the OCI spec. +type DeviceNode struct { + HostPath string `json:"hostPath"` + ContainerPath string `json:"containerPath"` + Permissions []string `json:"permissions,omitempty"` +} + +// Mount represents a mount that needs to be added to the OCI spec. +type Mount struct { + HostPath string `json:"hostPath"` + ContainerPath string `json:"containerPath"` + Options []string `json:"options,omitempty"` +} + +// Hook represents a hook that needs to be added to the OCI spec. +type Hook struct { + HookName string `json:"hookName"` + Path string `json:"path"` + Args []string `json:"args,omitempty"` + Env []string `json:"env,omitempty"` + Timeout *int `json:"timeout,omitempty"` +} diff --git a/vendor/github.com/container-orchestrated-devices/container-device-interface/specs-go/oci.go b/vendor/github.com/container-orchestrated-devices/container-device-interface/specs-go/oci.go new file mode 100644 index 000000000..c59cda55d --- /dev/null +++ b/vendor/github.com/container-orchestrated-devices/container-device-interface/specs-go/oci.go @@ -0,0 +1,104 @@ +package specs + +import ( + "errors" + "fmt" + + spec "github.com/opencontainers/runtime-spec/specs-go" +) + +// ApplyOCIEditsForDevice applies devices OCI edits, in other words +// it finds the device in the CDI spec and applies the OCI patches that device +// requires to the OCI specification. +func ApplyOCIEditsForDevice(config *spec.Spec, cdi *Spec, dev string) error { + for _, d := range cdi.Devices { + if d.Name != dev { + continue + } + + return ApplyEditsToOCISpec(config, &d.ContainerEdits) + } + + return fmt.Errorf("CDI: device %q not found for spec %q", dev, cdi.Kind) +} + +// ApplyOCIEdits applies the OCI edits the CDI spec declares globablly +func ApplyOCIEdits(config *spec.Spec, cdi *Spec) error { + return ApplyEditsToOCISpec(config, &cdi.ContainerEdits) +} + +// ApplyEditsToOCISpec applies the specified edits to the OCI spec. +func ApplyEditsToOCISpec(config *spec.Spec, edits *ContainerEdits) error { + if config == nil { + return errors.New("spec is nil") + } + if edits == nil { + return nil + } + + if len(edits.Env) > 0 { + + if config.Process == nil { + config.Process = &spec.Process{} + } + + config.Process.Env = append(config.Process.Env, edits.Env...) + } + + for _, d := range edits.DeviceNodes { + config.Mounts = append(config.Mounts, toOCIDevice(d)) + } + + for _, m := range edits.Mounts { + config.Mounts = append(config.Mounts, toOCIMount(m)) + } + + for _, h := range edits.Hooks { + if config.Hooks == nil { + config.Hooks = &spec.Hooks{} + } + switch h.HookName { + case "prestart": + config.Hooks.Prestart = append(config.Hooks.Prestart, toOCIHook(h)) + case "createRuntime": + config.Hooks.CreateRuntime = append(config.Hooks.CreateRuntime, toOCIHook(h)) + case "createContainer": + config.Hooks.CreateContainer = append(config.Hooks.CreateContainer, toOCIHook(h)) + case "startContainer": + config.Hooks.StartContainer = append(config.Hooks.StartContainer, toOCIHook(h)) + case "poststart": + config.Hooks.Poststart = append(config.Hooks.Poststart, toOCIHook(h)) + case "poststop": + config.Hooks.Poststop = append(config.Hooks.Poststop, toOCIHook(h)) + default: + fmt.Printf("CDI: Unknown hook %q\n", h.HookName) + } + } + + return nil +} + +func toOCIHook(h *Hook) spec.Hook { + return spec.Hook{ + Path: h.Path, + Args: h.Args, + Env: h.Env, + Timeout: h.Timeout, + } +} + +func toOCIMount(m *Mount) spec.Mount { + return spec.Mount{ + Source: m.HostPath, + Destination: m.ContainerPath, + Options: m.Options, + } +} + +func toOCIDevice(d *DeviceNode) spec.Mount { + return spec.Mount{ + Source: d.HostPath, + Destination: d.ContainerPath, + Options: d.Permissions, + } +} |