rgw: Add documentation for RGW default quota

Signed-off-by: Pavan Rallabhandi <PRallabhandi@walmartlabs.com>

doc/radosgw/admin.rst

@@ -400,6 +400,15 @@ To see how much of the quota a user has consumed, execute the following::
 .. note:: You should execute ``radosgw-admin user stats`` with the 
    ``--sync-stats`` option to receive the latest data.
 
+Default Quotas
+--------------
+
+You can set default quotas in the config.  These defaults are used when
+creating a new user and have no effect on existing users. If the
+relevant default quota is set in config, then that quota is set on the
+new user, and that quota is enabled.  See ``rgw bucket default quota max objects``,
+``rgw bucket default quota max size``, ``rgw user default quota max objects``, and
+``rgw user default quota max size`` in `Ceph Object Gateway Config Reference`_
 
 Reading / Writing Global Quotas
 -------------------------------
@@ -468,3 +477,4 @@ ranges for trim operations. ::
 
 .. _radosgw-admin: ../../man/8/radosgw-admin/
 .. _Pool Configuration: ../../rados/configuration/pool-pg-config-ref/
+.. _Ceph Object Gateway Config Reference: ../config-ref/

doc/radosgw/config-ref.rst

@@ -346,6 +346,40 @@ Ceph configuration file, the default value will be set automatically.
 :Type: Boolean
 :Default: ``false``
 
+
+``rgw bucket default quota max objects``
+
+:Description: Default max number of objects per bucket. Set on new users,
+              if no other quota is specified. Has no effect on existing users.
+:Type: Integer
+:Default: ``-1``
+
+
+``rgw bucket default quota max size``
+
+:Description: Default max capacity per bucket, in bytes. Set on new users,
+              if no other quota is specified. Has no effect on existing users.
+:Type: Integer
+:Default: ``-1``
+
+
+``rgw user default quota max objects``
+
+:Description: Default max number of objects for a user. This includes all
+              objects in all buckets owned by the user. Set on new users,
+              if no other quota is specified. Has no effect on existing users.
+:Type: Integer
+:Default: ``-1``
+
+
+``rgw user default quota max size``
+
+:Description: The value for user max size quota in bytes set on new users,
+              if no other quota is specified.  Has no effect on existing users.
+:Type: Integer
+:Default: ``-1``
+
+
 Regions
 =======
 

src/common/config_opts.h

@@ -1398,7 +1398,7 @@ OPTION(rgw_bucket_quota_ttl, OPT_INT, 600) // time for cached bucket stats to be
 OPTION(rgw_bucket_quota_soft_threshold, OPT_DOUBLE, 0.95) // threshold from which we don't rely on cached info for quota decisions
 OPTION(rgw_bucket_quota_cache_size, OPT_INT, 10000) // number of entries in bucket quota cache
 OPTION(rgw_bucket_default_quota_max_objects, OPT_INT, -1) // number of objects allowed
-OPTION(rgw_bucket_default_quota_max_size, OPT_LONGLONG, -1) // Max size of object in kB
+OPTION(rgw_bucket_default_quota_max_size, OPT_LONGLONG, -1) // Max size of object in bytes
 
 OPTION(rgw_expose_bucket, OPT_BOOL, false) // Return the bucket name in the 'Bucket' response header
 
@@ -1409,7 +1409,7 @@ OPTION(rgw_user_quota_sync_interval, OPT_INT, 3600 * 24) // time period for accu
 OPTION(rgw_user_quota_sync_idle_users, OPT_BOOL, false) // whether stats for idle users be fully synced
 OPTION(rgw_user_quota_sync_wait_time, OPT_INT, 3600 * 24) // min time between two full stats sync for non-idle users
 OPTION(rgw_user_default_quota_max_objects, OPT_INT, -1) // number of objects allowed
-OPTION(rgw_user_default_quota_max_size, OPT_LONGLONG, -1) // Max size of object in kB
+OPTION(rgw_user_default_quota_max_size, OPT_LONGLONG, -1) // Max size of object in bytes
 
 OPTION(rgw_multipart_min_part_size, OPT_INT, 5 * 1024 * 1024) // min size for each part (except for last one) in multipart upload
 OPTION(rgw_multipart_part_upload_limit, OPT_INT, 10000) // parts limit in multipart upload