smbcc: Add Permissions to ConfigSection

This is used to set the Permissions section in the config.json file. The
permissions section contains the permission handler and the necessary
mode to be set on the exported path.

Signed-off-by: Sachin Prabhu <[email protected]>

Author: spuiuk

internal/smbcc/container_config.go

@@ -54,10 +54,11 @@ type SambaContainerConfig struct {
 // ConfigSection identifies the shares, globals, and instance name of
 // a single configuration.
 type ConfigSection struct {
-	Shares           []Key         `json:"shares,omitempty"`
-	Globals          []Key         `json:"globals,omitempty"`
-	InstanceName     string        `json:"instance_name,omitempty"`
-	InstanceFeatures []FeatureFlag `json:"instance_features,omitempty"`
+	Shares           []Key             `json:"shares,omitempty"`
+	Globals          []Key             `json:"globals,omitempty"`
+	InstanceName     string            `json:"instance_name,omitempty"`
+	InstanceFeatures []FeatureFlag     `json:"instance_features,omitempty"`
+	Permissions      PermissionsConfig `json:"permissions,omitempty"`
 }
 
 // ShareConfig holds configuration values for one share.
@@ -94,6 +95,13 @@ type GroupEntries []GroupEntry
 // SmbOptions is a common type for storing smb.conf parameters.
 type SmbOptions map[string]string
 
+// PermissionsConfig indicates the permissions to be set on the share mountpoint
+type PermissionsConfig struct {
+	Method      string `json:"method,omitempty"`
+	StatusXAttr string `json:"status_xattr,omitempty"`
+	Mode        string `json:"mode,omitempty"`
+}
+
 const version0 = "v0"
 
 const (
@@ -176,6 +184,15 @@ func NewConfigSection(name string) ConfigSection {
 	}
 }
 
+// NewPermissionsConfig returns a new PermissionsConfig.
+func NewPermissionsConfig() PermissionsConfig {
+	return PermissionsConfig{
+		Method:      "initialize-share-perms",
+		StatusXAttr: "user.share-perms-status",
+		Mode:        "0777",
+	}
+}
+
 // NewDefaultUsers returns a full subsection for a default (good for testing)
 // set of users.
 func NewDefaultUsers() map[Key]UserEntries {