rbd: add RequestedVolSize to rbdVolume struct

when doing the internal operation to get the
latest details the rbd image size is also getting
updated and this will update the volume size also
without actual requested size we cannot do the
resize operation for bigger clones. This commit
adds a new field called RequestedVolSize to rbdVolume
struct to hold the user requested size.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

internal/rbd/controllerserver.go

@@ -136,6 +136,8 @@ func (cs *ControllerServer) parseVolCreateRequest(
 
 	// always round up the request size in bytes to the nearest MiB/GiB
 	rbdVol.VolSize = util.RoundOffBytes(volSizeBytes)
+	// RequestedVolSize has the size of the volume requested by the user.
+	rbdVol.RequestedVolSize = rbdVol.VolSize
 
 	// start with pool the same as journal pool, in case there is a topology
 	// based split, pool for the image will be updated subsequently

internal/rbd/rbd_util.go

@@ -164,6 +164,9 @@ type rbdVolume struct {
 	VolName            string `json:"volName"`
 	MonValueFromSecret string `json:"monValueFromSecret"`
 	VolSize            int64  `json:"volSize"`
+	// RequestedVolSize has the size of the volume requested by the user and
+	// this value will not be updated when doing getImageInfo() on rbdVolume.
+	RequestedVolSize   int64
 	DisableInUseChecks bool `json:"disableInUseChecks"`
 	readOnly           bool
 	Primary            bool