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Create the needed functions to save info on the host
this commit adds the functionality needed to save the PF information into the host. we need this in case the user removes a policy that was externallyCreated. we must NOT delete reset the VFs in that case and the only way to know that the device was externallyCreated after the user removes the policy is to check this file on the host. Signed-off-by: Sebastian Sch <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| package utils | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/golang/glog" | ||
|
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| sriovnetworkv1 "github.com/k8snetworkplumbingwg/sriov-network-operator/api/v1" | ||
| ) | ||
|
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| const ( | ||
| SriovConfBasePath = "/etc/sriov-operator" | ||
| PfAppliedConfig = SriovConfBasePath + "/pci" | ||
| HostSriovConfBasePath = "/host" + SriovConfBasePath | ||
| HostPfAppliedConfig = HostSriovConfBasePath + "/pci" | ||
| ) | ||
|
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| type PfStatus struct { | ||
| NumVfs int `json:"numVfs"` | ||
| Mtu int `json:"mtu"` | ||
| LinkType string `json:"linkType"` | ||
| EswitchMode string `json:"eSwitchMode"` | ||
| ExternallyCreated bool `json:"externallyCreated"` | ||
| } | ||
|
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| // create the operator base folder on the host together with the pci folder to save the PF status objects as json files | ||
| func CreateOperatorConfigFolderIfNeeded() error { | ||
| _, err := os.Stat(SriovConfBasePath) | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| err = os.Mkdir(SriovConfBasePath, os.ModeDir) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to create the sriov config folder on host in path %s: %v", SriovConfBasePath, err) | ||
| } | ||
| } else { | ||
| return fmt.Errorf("failed to check if the sriov config folder on host in path %s exist: %v", SriovConfBasePath, err) | ||
| } | ||
| } | ||
|
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| _, err = os.Stat(PfAppliedConfig) | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| err = os.Mkdir(PfAppliedConfig, os.ModeDir) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to create the pci folder on host in path %s: %v", PfAppliedConfig, err) | ||
| } | ||
| } else { | ||
| return fmt.Errorf("failed to check if the pci folder on host in path %s exist: %v", PfAppliedConfig, err) | ||
| } | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
|
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| func ClearPCIAddressFolder() error { | ||
| _, err := os.Stat(HostPfAppliedConfig) | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| return nil | ||
| } | ||
| return fmt.Errorf("failed to check the pci address folder path %s", HostPfAppliedConfig) | ||
| } | ||
|
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| err = os.RemoveAll(HostPfAppliedConfig) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to remove the PCI address folder on path %s: %v", HostPfAppliedConfig, err) | ||
| } | ||
|
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| err = os.Mkdir(HostPfAppliedConfig, os.ModeDir) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to create the pci folder on host in path %s: %v", HostPfAppliedConfig, err) | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| func CreatePfAppliedStatusFromSpec(p *sriovnetworkv1.Interface) *PfStatus { | ||
| return &PfStatus{ | ||
| ExternallyCreated: p.ExternallyCreated, | ||
| NumVfs: p.NumVfs, | ||
| EswitchMode: p.EswitchMode, | ||
| Mtu: p.Mtu, | ||
| LinkType: p.LinkType, | ||
| } | ||
| } | ||
|
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| // SaveLastPfAppliedStatus will save the PF object as a json into the /etc/sriov-operator/pci/<pci-address> | ||
| // this function must be called after running the chroot function | ||
| func SaveLastPfAppliedStatus(pciAddress string, pfStatus *PfStatus) error { | ||
| if err := CreateOperatorConfigFolderIfNeeded(); err != nil { | ||
| return err | ||
| } | ||
|
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| data, err := json.Marshal(pfStatus) | ||
| if err != nil { | ||
| glog.Errorf("failed to marshal PF status %+v: %v", *pfStatus, err) | ||
| return err | ||
| } | ||
|
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| path := filepath.Join(PfAppliedConfig, pciAddress) | ||
| err = os.WriteFile(path, data, 0644) | ||
| return err | ||
| } | ||
|
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| // LoadPfsStatus convert the /etc/sriov-operator/pci/<pci-address> json to pfstatus | ||
| // returns false if the file doesn't exist. | ||
| func LoadPfsStatus(pciAddress string, chroot bool) (*PfStatus, bool, error) { | ||
| if chroot { | ||
| exit, err := Chroot("/host") | ||
| if err != nil { | ||
| return nil, false, err | ||
| } | ||
| defer exit() | ||
| } | ||
|
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| pfStatus := &PfStatus{} | ||
| path := filepath.Join(PfAppliedConfig, pciAddress) | ||
| data, err := os.ReadFile(path) | ||
| if err != nil { | ||
| if os.IsNotExist(err) { | ||
| return nil, false, nil | ||
| } | ||
| glog.Errorf("failed to read PF status from path %s: %v", path, err) | ||
| } | ||
|
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| err = json.Unmarshal(data, pfStatus) | ||
| if err != nil { | ||
| glog.Errorf("failed to unmarshal PF status %s: %v", data, err) | ||
| } | ||
|
|
||
| return pfStatus, true, nil | ||
| } |
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