# HG changeset patch
# User Timo Sirainen <timo.sirainen@dovecot.fi>
# Date 1500919713 -10800
# Node ID 18726a70209b5f3fbc8cf2e33691ea622e41967c
# Parent  d802f801c8f90588fc85246d78d705899886546c
lib-storage: Try to get mailbox list index's permissions from its parent directory

This avoids stat()ing the mail/index root directory, which is especially
useful when mailbox list index is stored in tmpfs.

diff -r d802f801c8f9 -r 18726a70209b src/lib-storage/list/mailbox-list-index.c
--- a/src/lib-storage/list/mailbox-list-index.c	Mon Jul 24 21:07:44 2017 +0300
+++ b/src/lib-storage/list/mailbox-list-index.c	Mon Jul 24 21:08:33 2017 +0300
@@ -56,7 +56,6 @@
 {
 	struct mailbox_list_index *ilist = INDEX_LIST_CONTEXT(list);
 	const struct mail_storage_settings *set = list->mail_set;
-	struct mailbox_permissions perm;
 	enum mail_index_open_flags index_flags;
 	unsigned int lock_timeout;
 
@@ -77,10 +76,14 @@
 	lock_timeout = set->mail_max_lock_timeout == 0 ? UINT_MAX :
 		set->mail_max_lock_timeout;
 
-	mailbox_list_get_root_permissions(list, &perm);
-	mail_index_set_permissions(ilist->index, perm.file_create_mode,
-				   perm.file_create_gid,
-				   perm.file_create_gid_origin);
+	if (!mail_index_use_existing_permissions(ilist->index)) {
+		struct mailbox_permissions perm;
+
+		mailbox_list_get_root_permissions(list, &perm);
+		mail_index_set_permissions(ilist->index, perm.file_create_mode,
+					   perm.file_create_gid,
+					   perm.file_create_gid_origin);
+	}
 	mail_index_set_log_rotation(ilist->index,
 				    MAILBOX_LIST_INDEX_LOG_ROTATE_MIN_SIZE,
 				    MAILBOX_LIST_INDEX_LOG_ROTATE_MAX_SIZE,