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[v2,net-next,11/14] rtnetlink: Clean up rtnl_setlink().

Message ID 20241016185357.83849-12-kuniyu@amazon.com (mailing list archive)
State Accepted
Commit 6e495fad88ef7bdea70b0e4a1a714f6eccab2a5a
Delegated to: Netdev Maintainers
Headers show
Series rtnetlink: Refactor rtnl_{new,del,set}link() for per-netns RTNL. | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 5 this patch: 5
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 6 this patch: 6
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 39 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 6 this patch: 6
netdev/source_inline success Was 0 now: 0

Commit Message

Kuniyuki Iwashima Oct. 16, 2024, 6:53 p.m. UTC 
We will push RTNL down to rtnl_setlink().

Let's unify the error path to make it easy to place rtnl_net_lock().

While at it, keep the variables in reverse xmas order.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 net/core/rtnetlink.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index a19b2eb2727e..f89a902458d6 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3279,11 +3279,11 @@  static struct net_device *rtnl_dev_get(struct net *net,
 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
 			struct netlink_ext_ack *extack)
 {
+	struct ifinfomsg *ifm = nlmsg_data(nlh);
 	struct net *net = sock_net(skb->sk);
-	struct ifinfomsg *ifm;
-	struct net_device *dev;
-	int err;
 	struct nlattr *tb[IFLA_MAX+1];
+	struct net_device *dev = NULL;
+	int err;
 
 	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
 				     ifla_policy, extack);
@@ -3294,21 +3294,18 @@  static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (err < 0)
 		goto errout;
 
-	err = -EINVAL;
-	ifm = nlmsg_data(nlh);
 	if (ifm->ifi_index > 0)
 		dev = __dev_get_by_index(net, ifm->ifi_index);
 	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
 		dev = rtnl_dev_get(net, tb);
 	else
-		goto errout;
+		err = -EINVAL;
 
-	if (dev == NULL) {
+	if (dev)
+		err = do_setlink(skb, dev, ifm, extack, tb, 0);
+	else if (!err)
 		err = -ENODEV;
-		goto errout;
-	}
 
-	err = do_setlink(skb, dev, ifm, extack, tb, 0);
 errout:
 	return err;
 }