netdev - [patch net-next v2 8/9] devlink: remove devlink_dump_for_each_instance

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Date:   Sat,  7 Jan 2023 11:11:50 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, michael.chan@...adcom.com,
        yisen.zhuang@...wei.com, salil.mehta@...wei.com,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        tariqt@...dia.com, saeedm@...dia.com, leon@...nel.org,
        idosch@...dia.com, petrm@...dia.com, mailhol.vincent@...adoo.fr,
        jacob.e.keller@...el.com, gal@...dia.com
Subject: [patch net-next v2 8/9] devlink: remove devlink_dump_for_each_instance_get() helper

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

devlink_dump_for_each_instance_get() is currently called from
a single place in netlink.c. As there is no need to use
this helper anywhere else in the future, remove it and
call devlinks_xa_find_get() directly from while loop
in devlink_nl_instance_iter_dump(). Also remove redundant
idx clear on loop end as it is already done
in devlink_nl_instance_iter_dump().

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
v1->v2: new patch, unsquashed from the previous one
---
 net/devlink/devl_internal.h | 11 -----------
 net/devlink/netlink.c       |  5 ++++-
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index 1f046b4ab638..2b0e119e7b84 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -121,17 +121,6 @@ struct devlink_gen_cmd {
 			struct netlink_callback *cb);
 };
 
-/* Iterate over registered devlink instances for devlink dump.
- * devlink_put() needs to be called for each iterated devlink pointer
- * in loop body in order to release the reference.
- * Note: this is NOT a generic iterator, it makes assumptions about the use
- *	 of @state and can only be used once per dumpit implementation.
- */
-#define devlink_dump_for_each_instance_get(msg, state, devlink)		\
-	for (; (devlink = devlinks_xa_find_get(sock_net(msg->sk),	\
-					       &state->instance));	\
-	     state->instance++, state->idx = 0)
-
 extern const struct genl_small_ops devlink_nl_ops[56];
 
 struct devlink *
diff --git a/net/devlink/netlink.c b/net/devlink/netlink.c
index d4539c1aedea..3f44633af01c 100644
--- a/net/devlink/netlink.c
+++ b/net/devlink/netlink.c
@@ -207,7 +207,8 @@ int devlink_nl_instance_iter_dump(struct sk_buff *msg,
 
 	cmd = devl_gen_cmds[info->op.cmd];
 
-	devlink_dump_for_each_instance_get(msg, state, devlink) {
+	while ((devlink = devlinks_xa_find_get(sock_net(msg->sk),
+					       &state->instance))) {
 		devl_lock(devlink);
 
 		if (devl_is_registered(devlink))
@@ -221,6 +222,8 @@ int devlink_nl_instance_iter_dump(struct sk_buff *msg,
 		if (err)
 			break;
 
+		state->instance++;
+
 		/* restart sub-object walk for the next instance */
 		state->idx = 0;
 	}
-- 
2.39.0