netdev - [patch net-next RFC 06/10] net: devlink: add unlocked variants of devlink_trap

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Date:   Tue, 12 Jul 2022 13:05:07 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, mlxsw@...dia.com, idosch@...dia.com,
        saeedm@...dia.com, moshe@...dia.com, tariqt@...dia.com
Subject: [patch net-next RFC 06/10] net: devlink: add unlocked variants of devlink_trap_policers*() functions

From: Jiri Pirko <jiri@...dia.com>

Add unlocked variants of devlink_trap_policers*() functions to be used
in drivers called-in with devlink->lock held.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
 include/net/devlink.h |  8 ++++++
 net/core/devlink.c    | 61 +++++++++++++++++++++++++++++++++++--------
 2 files changed, 58 insertions(+), 11 deletions(-)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 66722e4dcb87..18ad88527847 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1808,10 +1808,18 @@ void devlink_trap_groups_unregister(struct devlink *devlink,
 				    const struct devlink_trap_group *groups,
 				    size_t groups_count);
 int
+devl_trap_policers_register(struct devlink *devlink,
+			    const struct devlink_trap_policer *policers,
+			    size_t policers_count);
+int
 devlink_trap_policers_register(struct devlink *devlink,
 			       const struct devlink_trap_policer *policers,
 			       size_t policers_count);
 void
+devl_trap_policers_unregister(struct devlink *devlink,
+			      const struct devlink_trap_policer *policers,
+			      size_t policers_count);
+void
 devlink_trap_policers_unregister(struct devlink *devlink,
 				 const struct devlink_trap_policer *policers,
 				 size_t policers_count);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 20b2a5e2c2f2..efd0772e8c42 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -12185,7 +12185,7 @@ devlink_trap_policer_unregister(struct devlink *devlink,
 }
 
 /**
- * devlink_trap_policers_register - Register packet trap policers with devlink.
+ * devl_trap_policers_register - Register packet trap policers with devlink.
  * @devlink: devlink.
  * @policers: Packet trap policers.
  * @policers_count: Count of provided packet trap policers.
@@ -12193,13 +12193,13 @@ devlink_trap_policer_unregister(struct devlink *devlink,
  * Return: Non-zero value on failure.
  */
 int
-devlink_trap_policers_register(struct devlink *devlink,
-			       const struct devlink_trap_policer *policers,
-			       size_t policers_count)
+devl_trap_policers_register(struct devlink *devlink,
+			    const struct devlink_trap_policer *policers,
+			    size_t policers_count)
 {
 	int i, err;
 
-	devl_lock(devlink);
+	devl_assert_locked(devlink);
 	for (i = 0; i < policers_count; i++) {
 		const struct devlink_trap_policer *policer = &policers[i];
 
@@ -12214,35 +12214,74 @@ devlink_trap_policers_register(struct devlink *devlink,
 		if (err)
 			goto err_trap_policer_register;
 	}
-	devl_unlock(devlink);
-
 	return 0;
 
 err_trap_policer_register:
 err_trap_policer_verify:
 	for (i--; i >= 0; i--)
 		devlink_trap_policer_unregister(devlink, &policers[i]);
+	return err;
+}
+EXPORT_SYMBOL_GPL(devl_trap_policers_register);
+
+/**
+ * devlink_trap_policers_register - Register packet trap policers with devlink.
+ * @devlink: devlink.
+ * @policers: Packet trap policers.
+ * @policers_count: Count of provided packet trap policers.
+ *
+ * Return: Non-zero value on failure.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+int
+devlink_trap_policers_register(struct devlink *devlink,
+			       const struct devlink_trap_policer *policers,
+			       size_t policers_count)
+{
+	int err;
+
+	devl_lock(devlink);
+	err = devl_trap_policers_register(devlink, policers, policers_count);
 	devl_unlock(devlink);
 	return err;
 }
 EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
 
+/**
+ * devl_trap_policers_unregister - Unregister packet trap policers from devlink.
+ * @devlink: devlink.
+ * @policers: Packet trap policers.
+ * @policers_count: Count of provided packet trap policers.
+ */
+void
+devl_trap_policers_unregister(struct devlink *devlink,
+			      const struct devlink_trap_policer *policers,
+			      size_t policers_count)
+{
+	int i;
+
+	devl_assert_locked(devlink);
+	for (i = policers_count - 1; i >= 0; i--)
+		devlink_trap_policer_unregister(devlink, &policers[i]);
+}
+EXPORT_SYMBOL_GPL(devl_trap_policers_unregister);
+
 /**
  * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
  * @devlink: devlink.
  * @policers: Packet trap policers.
  * @policers_count: Count of provided packet trap policers.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
  */
 void
 devlink_trap_policers_unregister(struct devlink *devlink,
 				 const struct devlink_trap_policer *policers,
 				 size_t policers_count)
 {
-	int i;
-
 	devl_lock(devlink);
-	for (i = policers_count - 1; i >= 0; i--)
-		devlink_trap_policer_unregister(devlink, &policers[i]);
+	devl_trap_policers_unregister(devlink, policers, policers_count);
 	devl_unlock(devlink);
 }
 EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
-- 
2.35.3