Implement quota fetch all mode and use actual ranged query

mgmtd/assets/beegfs-mgmtd.toml

@@ -122,23 +122,24 @@
 # the IDs that exceed the limits and reports them back to the server nodes.
 # quota-update-interval = "30s"
 
-# The following options specify the User/Group IDs to be fetched from storage services for quota
-# checking and enforcement. They are disabled by default and least one needs to be enabled for
-# quota enforcement having any effect. They can be mixed.
+# The following options specify the User/Group IDs for which to query the quota entries on the
+# storage services. By default, all quota entries for all existing ids on the storage nodes are
+# queried automatically. This is the preferred way. Setting any option below (group or user) opts
+# out of automatic mode for users or groups (separately) and only queries the ids specified. The
+# settings can be mixed.
 
 # Defines the minimum id of the existing system users to be quota checked and enforced.
+# Set to opt out of automatic query of all quota entries for all ids on the storage server.
 # Note that this uses the users from the local machine the management is running on.
 # quota-user-system-ids-min = 1000
 
 # Loads the user ids to be quota queried and enforced from a file.
+# Set to opt out of automatic query of all quota entries for all ids on the storage server.
 # Ids must be numeric only and separated by any whitespace.
 # quota-user-ids-file = ""
 
 # Defines a range of user ids to be quota queried and enforced.
-# IMPORTANT: This setting may only be used for reasonable small ranges (hundreds or thousands).
-# For dynamic ids in a large range, the file should be used instead to query only the existing ids.
-# The file can be regularly updated by a cronjob to collect ids from external sources (e.g. active
-# directory).
+# Set to opt out of automatic query of all quota entries for all ids on the storage server.
 # quota-user-ids-range = "1000-1100"
 
 # Same as above, but for group IDs

mgmtd/src/config.rs

@@ -338,26 +338,31 @@ generate_structs! {
     #[serde(deserialize_with = "deserialize_duration")]
     quota_update_interval: Duration = Duration::from_secs(30),
 
+    // The following options specify the User/Group IDs for which to query the quota entries on the
+    // storage services. By default, all quota entries for all existing ids on the storage nodes
+    // are queried automatically. This is the preferred way. Setting any option below (group or
+    // user) opts out of automatic mode for users or groups (separately) and only queries the ids
+    // specified. The settings can be mixed.
+
     /// Defines the minimum id of the existing system users to be quota checked and enforced.
     ///
+    /// Set to opt out of automatic query of all quota entries for all ids on the storage server.
     /// Note that this uses the users from the local machine the management is running on.
     #[arg(long)]
     #[arg(num_args = 1)] // Overwrite the automatic `num_args = 0..=1`
     #[arg(value_name = "ID")]
     quota_user_system_ids_min: Option<QuotaId> = None,
     /// Loads the user ids to be quota queried and enforced from a file.
     ///
+    /// Set to opt out of automatic query of all quota entries for all ids on the storage server.
     /// Ids must be numeric only and separated by any whitespace.
     #[arg(long)]
     #[arg(num_args = 1)]
     #[arg(value_name = "PATH")]
     quota_user_ids_file: Option<PathBuf> = None,
     /// Defines a range of user ids to be quota queried and enforced.
     ///
-    /// IMPORTANT: This setting may only be used for reasonable small ranges (hundreds or
-    /// thousands). For dynamic ids in a large range, the file should be used instead to query
-    /// only the existing ids. The file can be regularly updated by a cronjob to collect ids from
-    /// external sources (e.g. active directory).
+    /// Set to opt out of automatic query of all quota entries for all ids on the storage server.
     #[arg(long)]
     #[arg(num_args = 1)]
     #[arg(value_name = "RANGE")]
@@ -369,24 +374,23 @@ generate_structs! {
 
     /// Defines the minimum id of the existing system groups to be quota checked and enforced.
     ///
+    /// Set to opt out of automatic query of all quota entries for all ids on the storage server.
     /// Note that this uses the groups from the local machine the management is running on.
     #[arg(long)]
     #[arg(num_args = 1)]
     #[arg(value_name = "ID")]
     quota_group_system_ids_min: Option<QuotaId> = None,
     /// Loads the group ids to be quota queried and enforced from a file.
     ///
+    /// Set to opt out of automatic query of all quota entries for all ids on the storage server.
     /// Ids must be numeric only and separated by any whitespace.
     #[arg(long)]
     #[arg(num_args = 1)]
     #[arg(value_name = "PATH")]
     quota_group_ids_file: Option<PathBuf> = None,
     /// Defines a range of group ids to be quota queried and enforced.
     ///
-    /// IMPORTANT: This setting may only be used for reasonable small ranges (hundreds or
-    /// thousands). For dynamic ids in a large range, the file should be used instead to query
-    /// only the existing ids. The file can be regularly updated by a cronjob to collect ids from
-    /// external sources (e.g. active directory).
+    /// Set to opt out of automatic query of all quota entries for all ids on the storage server.
     #[arg(long)]
     #[arg(num_args = 1)]
     #[arg(value_name = "RANGE")]