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[v2,net-next,4/6] net: Call preinit_net() without pernet_ops_rwsem.

Message ID 20240731200721.70601-5-kuniyu@amazon.com (mailing list archive)
State Accepted
Commit 930299491825575503ec411ff28473aaa6b8c9ca
Delegated to: Netdev Maintainers
Headers show
Series net: Random cleanup for netns initialisation. | 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: 42 this patch: 42
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: lixiaoyan@google.com
netdev/build_clang success Errors and warnings before: 43 this patch: 43
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: 43 this patch: 43
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 10 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 3 this patch: 3
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-01--06-00 (tests: 707)

Commit Message

Kuniyuki Iwashima July 31, 2024, 8:07 p.m. UTC
When initialising the root netns, we call preinit_net() under
pernet_ops_rwsem.

However, the operations in preinit_net() do not require pernet_ops_rwsem.

Also, we don't hold it for preinit_net() when initialising non-root netns.

To be consistent, let's call preinit_net() without pernet_ops_rwsem in
net_ns_init().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/core/net_namespace.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 6c9acb086852..b91c15b27fb2 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -1199,8 +1199,9 @@  void __init net_ns_init(void)
 #ifdef CONFIG_KEYS
 	init_net.key_domain = &init_net_key_domain;
 #endif
-	down_write(&pernet_ops_rwsem);
 	preinit_net(&init_net);
+
+	down_write(&pernet_ops_rwsem);
 	if (setup_net(&init_net, &init_user_ns))
 		panic("Could not setup the initial network namespace");