sd_notify(ready)

src/server/command.rs

@@ -50,10 +50,12 @@ async fn socket_activate(config: ServerConfig) -> anyhow::Result<()> {
     // TODO: allow getting socket path from other socket activation sources
     let conn = get_socket_from_systemd().await?;
     let uid = conn.peer_cred()?.uid();
-    let unix_user = UnixUser::from_uid(uid.into())?;
+    let unix_user = UnixUser::from_uid(uid)?;
 
     log::info!("Accepted connection from {}", unix_user.username);
 
+    sd_notify::notify(true, &[sd_notify::NotifyState::Ready]).ok();
+
     handle_requests_for_single_session(conn, &unix_user, &config).await?;
 
     Ok(())

src/server/config.rs

@@ -102,8 +102,11 @@ pub async fn create_mysql_connection_from_config(
     config: &MysqlConfig,
 ) -> anyhow::Result<MySqlConnection> {
     let mut display_config = config.clone();
-    display_config.password = "<REDACTED>".to_owned();
-    log::debug!("Connecting to MySQL server with parameters: {:#?}", display_config);
+    "<REDACTED>".clone_into(&mut display_config.password);
+    log::debug!(
+        "Connecting to MySQL server with parameters: {:#?}",
+        display_config
+    );
 
     match tokio::time::timeout(
         Duration::from_secs(config.timeout.unwrap_or(DEFAULT_TIMEOUT)),

src/server/server_loop.rs

@@ -57,11 +57,13 @@ pub async fn listen_for_incoming_connections(
 
     let listener = UnixListener::bind(socket_path)?;
 
+    sd_notify::notify(true, &[sd_notify::NotifyState::Ready]).ok();
+
     while let Ok((mut conn, _addr)) = listener.accept().await {
         let uid = conn.peer_cred()?.uid();
         log::trace!("Accepted connection from uid {}", uid);
 
-        let unix_user = match UnixUser::from_uid(uid.into()) {
+        let unix_user = match UnixUser::from_uid(uid) {
             Ok(user) => user,
             Err(e) => {
                 eprintln!("Failed to get UnixUser from uid: {}", e);

src/server/sql/database_operations.rs

@@ -26,9 +26,17 @@ pub(super) async fn unsafe_database_exists(
         sqlx::query("SELECT SCHEMA_NAME FROM information_schema.SCHEMATA WHERE SCHEMA_NAME = ?")
             .bind(database_name)
             .fetch_optional(connection)
-            .await?;
+            .await;
 
-    Ok(result.is_some())
+    if let Err(err) = &result {
+        log::error!(
+            "Failed to check if database '{}' exists: {:?}",
+            &database_name,
+            err
+        );
+    }
+
+    Ok(result?.is_some())
 }
 
 pub async fn create_databases(
@@ -80,6 +88,10 @@ pub async fn create_databases(
                 .map(|_| ())
                 .map_err(|err| CreateDatabaseError::MySqlError(err.to_string()));
 
+        if let Err(err) = &result {
+            log::error!("Failed to create database '{}': {:?}", &database_name, err);
+        }
+
         results.insert(database_name, result);
     }
 
@@ -135,6 +147,10 @@ pub async fn drop_databases(
                 .map(|_| ())
                 .map_err(|err| DropDatabaseError::MySqlError(err.to_string()));
 
+        if let Err(err) = &result {
+            log::error!("Failed to drop database '{}': {:?}", &database_name, err);
+        }
+
         results.insert(database_name, result);
     }
 
@@ -145,7 +161,7 @@ pub async fn list_databases_for_user(
     unix_user: &UnixUser,
     connection: &mut MySqlConnection,
 ) -> Result<Vec<String>, ListDatabasesError> {
-    sqlx::query(
+    let result = sqlx::query(
         r#"
           SELECT `SCHEMA_NAME` AS `database`
           FROM `information_schema`.`SCHEMATA`
@@ -161,5 +177,15 @@ pub async fn list_databases_for_user(
             .map(|row| row.try_get::<String, _>("database"))
             .collect::<Result<Vec<String>, sqlx::Error>>()
     })
-    .map_err(|err| ListDatabasesError::MySqlError(err.to_string()))
+    .map_err(|err| ListDatabasesError::MySqlError(err.to_string()));
+
+    if let Err(err) = &result {
+        log::error!(
+            "Failed to list databases for user '{}': {:?}",
+            unix_user.username,
+            err
+        );
+    }
+
+    result
 }

src/server/sql/database_privilege_operations.rs

@@ -136,7 +136,7 @@ async fn unsafe_get_database_privileges(
     database_name: &str,
     connection: &mut MySqlConnection,
 ) -> Result<Vec<DatabasePrivilegeRow>, sqlx::Error> {
-    sqlx::query_as::<_, DatabasePrivilegeRow>(&format!(
+    let result = sqlx::query_as::<_, DatabasePrivilegeRow>(&format!(
         "SELECT {} FROM `db` WHERE `db` = ?",
         DATABASE_PRIVILEGE_FIELDS
             .iter()
@@ -145,7 +145,17 @@ async fn unsafe_get_database_privileges(
     ))
     .bind(database_name)
     .fetch_all(connection)
-    .await
+    .await;
+
+    if let Err(e) = &result {
+        log::error!(
+            "Failed to get database privileges for '{}': {}",
+            &database_name,
+            e
+        );
+    }
+
+    result
 }
 
 // NOTE: this function is unsafe because it does no input validation.
@@ -155,7 +165,7 @@ pub async fn unsafe_get_database_privileges_for_db_user_pair(
     user_name: &str,
     connection: &mut MySqlConnection,
 ) -> Result<Option<DatabasePrivilegeRow>, sqlx::Error> {
-    sqlx::query_as::<_, DatabasePrivilegeRow>(&format!(
+    let result = sqlx::query_as::<_, DatabasePrivilegeRow>(&format!(
         "SELECT {} FROM `db` WHERE `db` = ? AND `user` = ?",
         DATABASE_PRIVILEGE_FIELDS
             .iter()
@@ -165,7 +175,18 @@ pub async fn unsafe_get_database_privileges_for_db_user_pair(
     .bind(database_name)
     .bind(user_name)
     .fetch_optional(connection)
-    .await
+    .await;
+
+    if let Err(e) = &result {
+        log::error!(
+            "Failed to get database privileges for '{}.{}': {}",
+            &database_name,
+            &user_name,
+            e
+        );
+    }
+
+    result
 }
 
 pub async fn get_databases_privilege_data(
@@ -220,7 +241,7 @@ pub async fn get_all_database_privileges(
     unix_user: &UnixUser,
     connection: &mut MySqlConnection,
 ) -> GetAllDatabasesPrivilegeData {
-    sqlx::query_as::<_, DatabasePrivilegeRow>(&format!(
+    let result = sqlx::query_as::<_, DatabasePrivilegeRow>(&format!(
         indoc! {r#"
           SELECT {} FROM `db` WHERE `db` IN
           (SELECT DISTINCT `SCHEMA_NAME` AS `database`
@@ -236,14 +257,20 @@ pub async fn get_all_database_privileges(
     .bind(create_user_group_matching_regex(unix_user))
     .fetch_all(connection)
     .await
-    .map_err(|e| GetAllDatabasesPrivilegeDataError::MySqlError(e.to_string()))
+    .map_err(|e| GetAllDatabasesPrivilegeDataError::MySqlError(e.to_string()));
+
+    if let Err(e) = &result {
+        log::error!("Failed to get all database privileges: {:?}", e);
+    }
+
+    result
 }
 
 async fn unsafe_apply_privilege_diff(
     database_privilege_diff: &DatabasePrivilegesDiff,
     connection: &mut MySqlConnection,
 ) -> Result<(), sqlx::Error> {
-    match database_privilege_diff {
+    let result = match database_privilege_diff {
         DatabasePrivilegesDiff::New(p) => {
             let tables = DATABASE_PRIVILEGE_FIELDS
                 .iter()
@@ -305,7 +332,13 @@ async fn unsafe_apply_privilege_diff(
                 .await
                 .map(|_| ())
         }
+    };
+
+    if let Err(e) = &result {
+        log::error!("Failed to apply database privilege diff: {}", e);
     }
+
+    result
 }
 
 async fn validate_diff(

src/server/sql/user_operations.rs

@@ -1,6 +1,6 @@
+use indoc::formatdoc;
 use itertools::Itertools;
 use std::collections::BTreeMap;
-use indoc::formatdoc;
 
 use serde::{Deserialize, Serialize};
 
@@ -29,7 +29,7 @@ async fn unsafe_user_exists(
     db_user: &str,
     connection: &mut MySqlConnection,
 ) -> Result<bool, sqlx::Error> {
-    sqlx::query(
+    let result = sqlx::query(
         r#"
           SELECT EXISTS(
             SELECT 1
@@ -41,7 +41,13 @@ async fn unsafe_user_exists(
     .bind(db_user)
     .fetch_one(connection)
     .await
-    .map(|row| row.get::<bool, _>(0))
+    .map(|row| row.get::<bool, _>(0));
+
+    if let Err(err) = &result {
+        log::error!("Failed to check if database user exists: {:?}", err);
+    }
+
+    result
 }
 
 pub async fn create_database_users(
@@ -80,6 +86,10 @@ pub async fn create_database_users(
             .map(|_| ())
             .map_err(|err| CreateUserError::MySqlError(err.to_string()));
 
+        if let Err(err) = &result {
+            log::error!("Failed to create database user '{}': {:?}", &db_user, err);
+        }
+
         results.insert(db_user, result);
     }
 
@@ -122,6 +132,10 @@ pub async fn drop_database_users(
             .map(|_| ())
             .map_err(|err| DropUserError::MySqlError(err.to_string()));
 
+        if let Err(err) = &result {
+            log::error!("Failed to drop database user '{}': {:?}", &db_user, err);
+        }
+
         results.insert(db_user, result);
     }
 
@@ -148,7 +162,7 @@ pub async fn set_password_for_database_user(
         _ => {}
     }
 
-    sqlx::query(
+    let result = sqlx::query(
         format!(
             "ALTER USER {}@'%' IDENTIFIED BY {}",
             quote_literal(db_user),
@@ -159,7 +173,17 @@ pub async fn set_password_for_database_user(
     .execute(&mut *connection)
     .await
     .map(|_| ())
-    .map_err(|err| SetPasswordError::MySqlError(err.to_string()))
+    .map_err(|err| SetPasswordError::MySqlError(err.to_string()));
+
+    if let Err(err) = &result {
+        log::error!(
+            "Failed to set password for database user '{}': {:?}",
+            &db_user,
+            err
+        );
+    }
+
+    result
 }
 
 // NOTE: this function is unsafe because it does no input validation.
@@ -167,7 +191,7 @@ async fn database_user_is_locked_unsafe(
     db_user: &str,
     connection: &mut MySqlConnection,
 ) -> Result<bool, sqlx::Error> {
-    sqlx::query(
+    let result = sqlx::query(
         r#"
           SELECT COALESCE(
             JSON_EXTRACT(`mysql`.`global_priv`.`priv`, "$.account_locked"),
@@ -181,7 +205,17 @@ async fn database_user_is_locked_unsafe(
     .bind(db_user)
     .fetch_one(connection)
     .await
-    .map(|row| row.get::<bool, _>(0))
+    .map(|row| row.get::<bool, _>(0));
+
+    if let Err(err) = &result {
+        log::error!(
+            "Failed to check if database user is locked '{}': {:?}",
+            &db_user,
+            err
+        );
+    }
+
+    result
 }
 
 pub async fn lock_database_users(
@@ -234,6 +268,10 @@ pub async fn lock_database_users(
         .map(|_| ())
         .map_err(|err| LockUserError::MySqlError(err.to_string()));
 
+        if let Err(err) = &result {
+            log::error!("Failed to lock database user '{}': {:?}", &db_user, err);
+        }
+
         results.insert(db_user, result);
     }
 
@@ -290,6 +328,10 @@ pub async fn unlock_database_users(
         .map(|_| ())
         .map_err(|err| UnlockUserError::MySqlError(err.to_string()));
 
+        if let Err(err) = &result {
+            log::error!("Failed to unlock database user '{}': {:?}", &db_user, err);
+        }
+
         results.insert(db_user, result);
     }
 
@@ -298,39 +340,55 @@ pub async fn unlock_database_users(
 
 /// This struct contains information about a database user.
 /// This can be extended if we need more information in the future.
-#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, FromRow)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct DatabaseUser {
-    #[sqlx(rename = "User")]
     pub user: String,
-
-    #[allow(dead_code)]
     #[serde(skip)]
-    #[sqlx(rename = "Host")]
     pub host: String,
-
-    #[sqlx(rename = "has_password")]
     pub has_password: bool,
-
-    #[sqlx(rename = "is_locked")]
     pub is_locked: bool,
-
-    #[sqlx(skip)]
     pub databases: Vec<String>,
 }
 
+/// Some mysql versions with some collations mark some columns as binary fields,
+/// which in the current version of sqlx is not parsable as string.
+/// See: https://github.com/launchbadge/sqlx/issues/3387
+#[inline]
+fn try_get_with_binary_fallback(
+    row: &sqlx::mysql::MySqlRow,
+    column: &str,
+) -> Result<String, sqlx::Error> {
+    row.try_get(column).or_else(|_| {
+        row.try_get::<Vec<u8>, _>(column)
+            .map(|v| String::from_utf8_lossy(&v).to_string())
+    })
+}
+
+impl FromRow<'_, sqlx::mysql::MySqlRow> for DatabaseUser {
+    fn from_row(row: &sqlx::mysql::MySqlRow) -> Result<Self, sqlx::Error> {
+        Ok(Self {
+            user: try_get_with_binary_fallback(row, "User")?,
+            host: try_get_with_binary_fallback(row, "Host")?,
+            has_password: row.try_get("has_password")?,
+            is_locked: row.try_get("is_locked")?,
+            databases: Vec::new(),
+        })
+    }
+}
+
 const DB_USER_SELECT_STATEMENT: &str = r#"
 SELECT
-  `mysql`.`user`.`User`,
-  `mysql`.`user`.`Host`,
-  `mysql`.`user`.`Password` != '' OR `mysql`.`user`.`authentication_string` != '' AS `has_password`,
+  `user`.`User`,
+  `user`.`Host`,
+  `user`.`Password` != '' OR `user`.`authentication_string` != '' AS `has_password`,
   COALESCE(
-    JSON_EXTRACT(`mysql`.`global_priv`.`priv`, "$.account_locked"),
+    JSON_EXTRACT(`global_priv`.`priv`, "$.account_locked"),
     'false'
   ) != 'false' AS `is_locked`
-FROM `mysql`.`user`
-JOIN `mysql`.`global_priv` ON
-  `mysql`.`user`.`User` = `mysql`.`global_priv`.`User`
-  AND `mysql`.`user`.`Host` = `mysql`.`global_priv`.`Host`
+FROM `user`
+JOIN `global_priv` ON
+  `user`.`User` = `global_priv`.`User`
+  AND `user`.`Host` = `global_priv`.`Host`
 "#;
 
 pub async fn list_database_users(
@@ -358,6 +416,10 @@ pub async fn list_database_users(
         .fetch_optional(&mut *connection)
         .await;
 
+        if let Err(err) = &result {
+            log::error!("Failed to list database user '{}': {:?}", &db_user, err);
+        }
+
         if let Ok(Some(user)) = result.as_mut() {
             append_databases_where_user_has_privileges(user, &mut *connection).await;
         }
@@ -377,13 +439,17 @@ pub async fn list_all_database_users_for_unix_user(
     connection: &mut MySqlConnection,
 ) -> ListAllUsersOutput {
     let mut result = sqlx::query_as::<_, DatabaseUser>(
-        &(DB_USER_SELECT_STATEMENT.to_string() + "WHERE `mysql`.`user`.`User` REGEXP ?"),
+        &(DB_USER_SELECT_STATEMENT.to_string() + "WHERE `user`.`User` REGEXP ?"),
     )
     .bind(create_user_group_matching_regex(unix_user))
     .fetch_all(&mut *connection)
     .await
     .map_err(|err| ListAllUsersError::MySqlError(err.to_string()));
 
+    if let Err(err) = &result {
+        log::error!("Failed to list all database users: {:?}", err);
+    }
+
     if let Ok(users) = result.as_mut() {
         for user in users {
             append_databases_where_user_has_privileges(user, &mut *connection).await;
@@ -394,15 +460,15 @@ pub async fn list_all_database_users_for_unix_user(
 }
 
 pub async fn append_databases_where_user_has_privileges(
-    database_user: &mut DatabaseUser,
+    db_user: &mut DatabaseUser,
     connection: &mut MySqlConnection,
 ) {
     let database_list = sqlx::query(
         formatdoc!(
             r#"
-                SELECT `db` AS `database`
+                SELECT `Db` AS `database`
                 FROM `db`
-                WHERE `user` = ? AND ({})
+                WHERE `User` = ? AND ({})
             "#,
             DATABASE_PRIVILEGE_FIELDS
                 .iter()
@@ -411,14 +477,22 @@ pub async fn append_databases_where_user_has_privileges(
         )
         .as_str(),
     )
-    .bind(database_user.user.clone())
+    .bind(db_user.user.clone())
     .fetch_all(&mut *connection)
     .await;
 
-    database_user.databases = database_list
+    if let Err(err) = &database_list {
+        log::error!(
+            "Failed to list databases for user '{}': {:?}",
+            &db_user.user,
+            err
+        );
+    }
+
+    db_user.databases = database_list
         .map(|rows| {
             rows.into_iter()
-                .map(|row| row.get::<String, _>("database"))
+                .map(|row| try_get_with_binary_fallback(&row, "database").unwrap())
                 .collect()
         })
         .unwrap_or_default();