diff mbox series

[v1,net-next,7/8] rtnetlink: Convert RTM_NEWLINK to per-netns RTNL.

Message ID 20241105020514.41963-8-kuniyu@amazon.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series rtnetlink: Convert rtnl_newlink() to 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: 3 this patch: 3
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 6 of 6 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: 8 this patch: 8
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 44 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
netdev/contest fail net-next-2024-11-05--06-00 (tests: 216)

Commit Message

Kuniyuki Iwashima Nov. 5, 2024, 2:05 a.m. UTC 
Now, we are ready to convert rtnl_newlink() to per-netns RTNL;
rtnl_link_ops is protected by SRCU and netns is prefetched in
rtnl_newlink().

Let's register rtnl_newlink() with RTNL_FLAG_DOIT_PERNET and
push RTNL down as rtnl_nets_lock().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/core/rtnetlink.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 48bd9e062550..0df0cba0a700 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -312,6 +312,26 @@  void rtnl_nets_add(struct rtnl_nets *rtnl_nets, struct net *net)
 }
 EXPORT_SYMBOL(rtnl_nets_add);
 
+static void rtnl_nets_lock(struct rtnl_nets *rtnl_nets)
+{
+	int i;
+
+	rtnl_lock();
+
+	for (i = 0; i < rtnl_nets->len; i++)
+		__rtnl_net_lock(rtnl_nets->net[i]);
+}
+
+static void rtnl_nets_unlock(struct rtnl_nets *rtnl_nets)
+{
+	int i;
+
+	for (i = 0; i < rtnl_nets->len; i++)
+		__rtnl_net_unlock(rtnl_nets->net[i]);
+
+	rtnl_unlock();
+}
+
 static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
 
 static inline int rtm_msgindex(int msgtype)
@@ -3991,7 +4011,9 @@  static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
 		}
 	}
 
+	rtnl_nets_lock(&rtnl_nets);
 	ret = __rtnl_newlink(skb, nlh, ops, tgt_net, link_net, tbs, data, extack);
+	rtnl_nets_unlock(&rtnl_nets);
 
 put_net:
 	rtnl_nets_destroy(&rtnl_nets);
@@ -6995,7 +7017,8 @@  static struct pernet_operations rtnetlink_net_ops = {
 };
 
 static const struct rtnl_msg_handler rtnetlink_rtnl_msg_handlers[] __initconst = {
-	{.msgtype = RTM_NEWLINK, .doit = rtnl_newlink},
+	{.msgtype = RTM_NEWLINK, .doit = rtnl_newlink,
+	 .flags = RTNL_FLAG_DOIT_PERNET},
 	{.msgtype = RTM_DELLINK, .doit = rtnl_dellink},
 	{.msgtype = RTM_GETLINK, .doit = rtnl_getlink,
 	 .dumpit = rtnl_dump_ifinfo, .flags = RTNL_FLAG_DUMP_SPLIT_NLM_DONE},