Send blockdev change signal on grow physical

Signed-off-by: mulhern <[email protected]>

src/dbus_api/blockdev/prop_conv.rs

@@ -17,3 +17,9 @@ pub fn blockdev_new_size_to_prop(new_size: Option<Sectors>) -> (bool, String) {
 pub fn blockdev_user_info_to_prop(user_info: Option<String>) -> (bool, String) {
     option_to_tuple(user_info, String::new())
 }
+
+/// Generate D-Bus representation of block device total physical size property.
+#[inline]
+pub fn blockdev_total_physical_size_to_prop(total_physical_size: Sectors) -> String {
+    total_physical_size.bytes().to_string()
+}

src/dbus_api/pool/pool_3_3/methods.rs

@@ -10,7 +10,7 @@ use crate::{
         types::{DbusErrorEnum, TData, OK_STRING},
         util::{engine_to_dbus_err_tuple, get_next_arg},
     },
-    engine::{DevUuid, EngineAction},
+    engine::{DevUuid, GrowAction},
 };
 
 pub fn grow_physical(m: &MethodInfo<'_, MTSync<TData>, TData>) -> MethodResult {
@@ -53,7 +53,14 @@ pub fn grow_physical(m: &MethodInfo<'_, MTSync<TData>, TData>) -> MethodResult {
     );
 
     let ret = match result {
-        Ok(grown) => grown.is_changed(),
+        Ok(GrowAction::Identity) => false,
+        Ok(GrowAction::Grown(_)) => {
+            dbus_context.push_blockdev_total_physical_size_change(
+                pool_path.get_name(),
+                pool.total_physical_size(),
+            );
+            true
+        }
         Err(err) => {
             let (rc, rs) = engine_to_dbus_err_tuple(&err);
             return Ok(vec![return_message.append3(default_return, rc, rs)]);

src/dbus_api/tree.rs

@@ -25,7 +25,10 @@ use devicemapper::{Bytes, Sectors};
 use crate::{
     dbus_api::{
         api::prop_conv::{locked_pools_to_prop, stopped_pools_to_prop},
-        blockdev::prop_conv::{blockdev_new_size_to_prop, blockdev_user_info_to_prop},
+        blockdev::prop_conv::{
+            blockdev_new_size_to_prop, blockdev_total_physical_size_to_prop,
+            blockdev_user_info_to_prop,
+        },
         consts,
         filesystem::prop_conv::{fs_size_to_prop, fs_used_to_prop},
         pool::prop_conv::{
@@ -857,6 +860,47 @@ impl DbusTreeHandler {
         }
     }
 
+    /// Send a signal indicating that the blockdev total physical size has
+    /// changed.
+    fn handle_blockdev_total_physical_size_change(
+        &self,
+        path: Path<'static>,
+        new_total_physical_size: Sectors,
+    ) {
+        let total_physical_size_prop =
+            blockdev_total_physical_size_to_prop(new_total_physical_size);
+        if let Err(e) = self.property_changed_invalidated_signal(
+            &path,
+            prop_hashmap!(
+                consts::BLOCKDEV_INTERFACE_NAME_3_3 => {
+                    Vec::new(),
+                    consts::BLOCKDEV_TOTAL_SIZE_PROP.to_string() =>
+                    box_variant!(total_physical_size_prop.clone())
+                },
+                consts::BLOCKDEV_INTERFACE_NAME_3_4 => {
+                    Vec::new(),
+                    consts::BLOCKDEV_TOTAL_SIZE_PROP.to_string() =>
+                    box_variant!(total_physical_size_prop.clone())
+                },
+                consts::BLOCKDEV_INTERFACE_NAME_3_5 => {
+                    Vec::new(),
+                    consts::BLOCKDEV_TOTAL_SIZE_PROP.to_string() =>
+                    box_variant!(total_physical_size_prop.clone())
+                },
+                consts::BLOCKDEV_INTERFACE_NAME_3_6 => {
+                    Vec::new(),
+                    consts::BLOCKDEV_TOTAL_SIZE_PROP.to_string() =>
+                    box_variant!(total_physical_size_prop)
+                }
+            ),
+        ) {
+            warn!(
+                "Failed to send a signal over D-Bus indicating blockdev total physical size change: {}",
+                e
+            );
+        }
+    }
+
     /// Send a signal indicating that the pool overprovisioning mode has changed.
     fn handle_pool_overprov_mode_change(&self, path: Path<'static>, new_mode: bool) {
         if let Err(e) = self.property_changed_invalidated_signal(
@@ -1125,6 +1169,10 @@ impl DbusTreeHandler {
                 self.handle_blockdev_user_info_change(path, new_user_info);
                 Ok(true)
             }
+            DbusAction::BlockdevTotalPhysicalSizeChange(path, new_total_physical_size) => {
+                self.handle_blockdev_total_physical_size_change(path, new_total_physical_size);
+                Ok(true)
+            }
             DbusAction::PoolForegroundChange(item, new_used, new_alloc, new_size, new_no_space) => {
                 self.handle_pool_foreground_change(
                     item,

src/dbus_api/types.rs

@@ -106,7 +106,7 @@ pub enum DbusAction {
     LockedPoolsChange(LockedPoolsInfo),
     StoppedPoolsChange(StoppedPoolsInfo),
     BlockdevUserInfoChange(Path<'static>, Option<String>),
-
+    BlockdevTotalPhysicalSizeChange(Path<'static>, Sectors),
     FsBackgroundChange(
         FilesystemUuid,
         SignalChange<Option<Bytes>>,
@@ -445,6 +445,26 @@ impl DbusContext {
         }
     }
 
+    /// Send changed signal for changed blockdev total size property.
+    pub fn push_blockdev_total_physical_size_change(
+        &self,
+        path: &Path<'static>,
+        total_physical_size: Sectors,
+    ) {
+        if let Err(e) = self
+            .sender
+            .send(DbusAction::BlockdevTotalPhysicalSizeChange(
+                path.clone(),
+                total_physical_size,
+            ))
+        {
+            warn!(
+                "Block device total physical size change event could not be sent to the processing thread; no signal will be sent out for the block device total physical size state change: {}",
+                e,
+            )
+        }
+    }
+
     /// Send changed signal for changed pool properties when blockdevs are
     /// added.
     pub fn push_pool_foreground_change(