[dpdk-stable] patch 'sched: rework configuration failure handling' has been queued to stable release 20.11.3

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/28/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/36c937ac722fe6dd55f2e3c2626bb77e16c88af6

Thanks.

Luca Boccassi

---
>From 36c937ac722fe6dd55f2e3c2626bb77e16c88af6 Mon Sep 17 00:00:00 2001
From: Huisong Li <lihuisong at huawei.com>
Date: Fri, 23 Apr 2021 19:01:12 +0800
Subject: [PATCH] sched: rework configuration failure handling

[ upstream commit c6ccd1e3922ac346333a52e584d6c9fa7a43f237 ]

Currently, rte_sched_free_memory() is called multiple times by the
exception handling code in rte_sched_subport_config() and
rte_sched_pipe_config().

This patch optimizes them into a unified outlet to free memory.

Fixes: ac6fcb841b0f ("sched: update subport rate dynamically")
Fixes: 34a90f86657c ("sched: modify pipe functions for config flexibility")
Fixes: ce7c4fd7c2ac ("sched: add pipe config to subport level")

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu at intel.com>
---
 lib/librte_sched/rte_sched.c | 56 +++++++++++++++++++-----------------
 1 file changed, 30 insertions(+), 26 deletions(-)

diff --git a/lib/librte_sched/rte_sched.c b/lib/librte_sched/rte_sched.c
index df0ab5cab9..a858f61f95 100644
--- a/lib/librte_sched/rte_sched.c
+++ b/lib/librte_sched/rte_sched.c
@@ -1090,6 +1090,7 @@ rte_sched_subport_config(struct rte_sched_port *port,
 	uint32_t n_subport_pipe_queues, i;
 	uint32_t size0, size1, bmp_mem_size;
 	int status;
+	int ret;
 
 	/* Check user parameters */
 	if (port == NULL) {
@@ -1101,17 +1102,16 @@ rte_sched_subport_config(struct rte_sched_port *port,
 	if (subport_id >= port->n_subports_per_port) {
 		RTE_LOG(ERR, SCHED,
 			"%s: Incorrect value for subport id\n", __func__);
-
-		rte_sched_free_memory(port, n_subports);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	if (subport_profile_id >= port->n_max_subport_profiles) {
 		RTE_LOG(ERR, SCHED, "%s: "
 			"Number of subport profile exceeds the max limit\n",
 			__func__);
-		rte_sched_free_memory(port, n_subports);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	/** Memory is allocated only on first invocation of the api for a
@@ -1127,9 +1127,8 @@ rte_sched_subport_config(struct rte_sched_port *port,
 			RTE_LOG(NOTICE, SCHED,
 				"%s: Port scheduler params check failed (%d)\n",
 				__func__, status);
-
-			rte_sched_free_memory(port, n_subports);
-			return -EINVAL;
+			ret = -EINVAL;
+			goto out;
 		}
 
 		/* Determine the amount of memory to allocate */
@@ -1143,9 +1142,8 @@ rte_sched_subport_config(struct rte_sched_port *port,
 		if (s == NULL) {
 			RTE_LOG(ERR, SCHED,
 				"%s: Memory allocation fails\n", __func__);
-
-			rte_sched_free_memory(port, n_subports);
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto out;
 		}
 
 		n_subports++;
@@ -1185,12 +1183,11 @@ rte_sched_subport_config(struct rte_sched_port *port,
 				    params->red_params[i][j].min_th,
 				    params->red_params[i][j].max_th,
 				    params->red_params[i][j].maxp_inv) != 0) {
-					rte_sched_free_memory(port, n_subports);
-
 					RTE_LOG(NOTICE, SCHED,
 					"%s: RED configuration init fails\n",
 					__func__);
-					return -EINVAL;
+					ret = -EINVAL;
+					goto out;
 				}
 			}
 		}
@@ -1238,9 +1235,8 @@ rte_sched_subport_config(struct rte_sched_port *port,
 		if (s->bmp == NULL) {
 			RTE_LOG(ERR, SCHED,
 				"%s: Subport bitmap init error\n", __func__);
-
-			rte_sched_free_memory(port, n_subports);
-			return -EINVAL;
+			ret = -EINVAL;
+			goto out;
 		}
 
 		for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++)
@@ -1285,6 +1281,11 @@ rte_sched_subport_config(struct rte_sched_port *port,
 	rte_sched_port_log_subport_profile(port, subport_profile_id);
 
 	return 0;
+
+out:
+	rte_sched_free_memory(port, n_subports);
+
+	return ret;
 }
 
 int
@@ -1299,6 +1300,7 @@ rte_sched_pipe_config(struct rte_sched_port *port,
 	struct rte_sched_pipe_profile *params;
 	uint32_t n_subports = subport_id + 1;
 	uint32_t deactivate, profile, i;
+	int ret;
 
 	/* Check user parameters */
 	profile = (uint32_t) pipe_profile;
@@ -1313,26 +1315,23 @@ rte_sched_pipe_config(struct rte_sched_port *port,
 	if (subport_id >= port->n_subports_per_port) {
 		RTE_LOG(ERR, SCHED,
 			"%s: Incorrect value for parameter subport id\n", __func__);
-
-		rte_sched_free_memory(port, n_subports);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	s = port->subports[subport_id];
 	if (pipe_id >= s->n_pipes_per_subport_enabled) {
 		RTE_LOG(ERR, SCHED,
 			"%s: Incorrect value for parameter pipe id\n", __func__);
-
-		rte_sched_free_memory(port, n_subports);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	if (!deactivate && profile >= s->n_pipe_profiles) {
 		RTE_LOG(ERR, SCHED,
 			"%s: Incorrect value for parameter pipe profile\n", __func__);
-
-		rte_sched_free_memory(port, n_subports);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	sp = port->subport_profiles + s->profile;
@@ -1406,6 +1405,11 @@ rte_sched_pipe_config(struct rte_sched_port *port,
 	}
 
 	return 0;
+
+out:
+	rte_sched_free_memory(port, n_subports);
+
+	return ret;
 }
 
 int
-- 
2.30.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-07-26 13:53:19.270538474 +0100
+++ 0057-sched-rework-configuration-failure-handling.patch	2021-07-26 13:53:15.969295145 +0100
@@ -1 +1 @@
-From c6ccd1e3922ac346333a52e584d6c9fa7a43f237 Mon Sep 17 00:00:00 2001
+From 36c937ac722fe6dd55f2e3c2626bb77e16c88af6 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit c6ccd1e3922ac346333a52e584d6c9fa7a43f237 ]
+
@@ -15 +16,0 @@
-Cc: stable at dpdk.org
@@ -21 +22 @@
- lib/sched/rte_sched.c | 56 +++++++++++++++++++++++--------------------
+ lib/librte_sched/rte_sched.c | 56 +++++++++++++++++++-----------------
@@ -24 +25 @@
-diff --git a/lib/sched/rte_sched.c b/lib/sched/rte_sched.c
+diff --git a/lib/librte_sched/rte_sched.c b/lib/librte_sched/rte_sched.c
@@ -26,2 +27,2 @@
---- a/lib/sched/rte_sched.c
-+++ b/lib/sched/rte_sched.c
+--- a/lib/librte_sched/rte_sched.c
++++ b/lib/librte_sched/rte_sched.c