DAOS-17535 cart: not exclude self when create corpc for IV

Otherwise, it may misguide subsequent crt_get_filtered_grp_rank_list()
and regard the IV root to be as non-exist in the ranks list, then fail
related IV operation with -DER_NONEXIST.

It maybe not a perfected solution for current cart IV logic. But to be
some temporary option, it makes CR to be workable when some ranks dead.

Add new test case to verfiy such corner case.

Signed-off-by: Fan Yong <[email protected]>

Author: Nasf-Fan

src/cart/crt_iv.c

@@ -2210,15 +2210,13 @@ crt_ivsync_rpc_issue(struct crt_ivns_internal *ivns_internal, uint32_t class_id,
 		     crt_iv_comp_cb_t update_comp_cb, void *cb_arg,
 		     void *user_priv, int update_rc)
 {
-	crt_rpc_t               *corpc_req = NULL;
-	struct crt_iv_sync_in	*input;
-	int			rc = 0;
-	bool			delay_completion = false;
-	struct iv_sync_cb_info	*iv_sync_cb = NULL;
-	struct crt_iv_ops	*iv_ops;
-	crt_bulk_t		local_bulk = CRT_BULK_NULL;
-	d_rank_list_t		excluded_list;
-	d_rank_t		excluded_ranks[1]; /* Excluding self */
+	struct crt_iv_sync_in  *input;
+	struct crt_iv_ops      *iv_ops;
+	crt_rpc_t              *corpc_req        = NULL;
+	struct iv_sync_cb_info *iv_sync_cb       = NULL;
+	crt_bulk_t              local_bulk       = CRT_BULK_NULL;
+	int                     rc               = 0;
+	bool                    delay_completion = false;
 
 	iv_ops = crt_iv_ops_get(ivns_internal, class_id);
 	D_ASSERT(iv_ops != NULL);
@@ -2243,10 +2241,6 @@ crt_ivsync_rpc_issue(struct crt_ivns_internal *ivns_internal, uint32_t class_id,
 		D_GOTO(exit, rc = -DER_INVAL);
 	}
 
-	/* Exclude self from corpc */
-	excluded_list.rl_nr = 1;
-	excluded_list.rl_ranks = excluded_ranks;
-	excluded_ranks[0] = ivns_internal->cii_grp_priv->gp_self;
 	/* Perform refresh on local node */
 	if (sync_type->ivs_event == CRT_IV_SYNC_EVENT_UPDATE)
 		rc = iv_ops->ivo_on_refresh(ivns_internal, iv_key, 0,
@@ -2273,13 +2267,9 @@ crt_ivsync_rpc_issue(struct crt_ivns_internal *ivns_internal, uint32_t class_id,
 		}
 	}
 
-	rc = crt_corpc_req_create(ivns_internal->cii_ctx,
-				  &ivns_internal->cii_grp_priv->gp_pub,
-				  &excluded_list,
-				  CRT_OPC_IV_SYNC,
-				  local_bulk, NULL, 0,
-				  ivns_internal->cii_gns.gn_tree_topo,
-				  &corpc_req);
+	rc = crt_corpc_req_create(ivns_internal->cii_ctx, &ivns_internal->cii_grp_priv->gp_pub,
+				  NULL, CRT_OPC_IV_SYNC, local_bulk, NULL, 0,
+				  ivns_internal->cii_gns.gn_tree_topo, &corpc_req);
 	if (rc != 0) {
 		D_ERROR("crt_corpc_req_create(): "DF_RC"\n", DP_RC(rc));
 		D_GOTO(exit, rc);

src/tests/suite/daos_cr.c

@@ -1,5 +1,6 @@
 /**
  * (C) Copyright 2023-2024 Intel Corporation.
+ * (C) Copyright 2025 Hewlett Packard Enterprise Development LP
  *
  * SPDX-License-Identifier: BSD-2-Clause-Patent
  */
@@ -3785,6 +3786,62 @@ cr_maintenance_mode(void **state)
 	cr_cleanup(arg, &pool, 1);
 }
 
+/*
+ * 1. Exclude rank 0.
+ * 2. Create pool without inconsistency.
+ * 3. Start checker without options.
+ * 4. Query checker, it should be completed instead of being blocked.
+ * 5. Switch to normal mode and cleanup.
+ */
+static void
+cr_lost_rank0(void **state)
+{
+	test_arg_t            *arg  = *state;
+	struct test_pool       pool = {0};
+	struct daos_check_info dci  = {0};
+	int                    rc;
+
+	print_message("CR29: run CR with rank 0 excluded at the beginning\n");
+
+	print_message("CR: excluding the rank 0 ...\n");
+	rc = dmg_system_exclude_rank(dmg_config_file, 0);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_pool_create(state, &pool, false, TCC_NONE);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_system_stop(false);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_mode_switch(true);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_check_start(TCSF_RESET, 0, NULL, NULL);
+	assert_rc_equal(rc, 0);
+
+	cr_ins_wait(1, &pool.pool_uuid, &dci);
+
+	rc = cr_ins_verify(&dci, TCIS_COMPLETED);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_pool_verify(&dci, pool.pool_uuid, TCPS_CHECKED, 0, NULL, NULL, NULL);
+	assert_rc_equal(rc, 0);
+
+	/* Reint the rank for subsequent test. */
+	rc = cr_rank_reint(0, true);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_mode_switch(false);
+	assert_rc_equal(rc, 0);
+
+	rc = cr_system_start();
+	assert_rc_equal(rc, 0);
+
+	cr_dci_fini(&dci);
+	cr_cleanup(arg, &pool, 1);
+}
+
+/* clang-format off */
 static const struct CMUnitTest cr_tests[] = {
 	{ "CR1: start checker for specified pools",
 	  cr_start_specified, async_disable, test_case_teardown},
@@ -3842,7 +3899,10 @@ static const struct CMUnitTest cr_tests[] = {
 	  cr_handle_fail_pool2, async_disable, test_case_teardown},
 	{ "CR28: maintenance mode after dry-run check",
 	  cr_maintenance_mode, async_disable, test_case_teardown},
+	{ "CR29: run CR with rank 0 excluded at the beginning",
+	  cr_lost_rank0, async_disable, test_case_teardown},
 };
+/* clang-format on */
 
 static int
 cr_setup(void **state)