From 4420bf21fb6c0306e36ad58ade1e741fba57ce65 Mon Sep 17 00:00:00 2001 From: Kirill Tkhai Date: Tue, 27 Mar 2018 18:02:23 +0300 Subject: net: Rename net_sem to pernet_ops_rwsem net_sem is some undefined area name, so it will be better to make the area more defined. Rename it to pernet_ops_rwsem for better readability and better intelligibility. Signed-off-by: Kirill Tkhai Signed-off-by: David S. Miller --- net/core/net_namespace.c | 40 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 20 deletions(-) (limited to 'net/core/net_namespace.c') diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index eef17ad29dea..9e8ee4640451 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -41,10 +41,10 @@ EXPORT_SYMBOL(init_net); static bool init_net_initialized; /* - * net_sem: protects: pernet_list, net_generic_ids, + * pernet_ops_rwsem: protects: pernet_list, net_generic_ids, * init_net_initialized and first_device pointer. */ -DECLARE_RWSEM(net_sem); +DECLARE_RWSEM(pernet_ops_rwsem); #define MIN_PERNET_OPS_ID \ ((sizeof(struct net_generic) + sizeof(void *) - 1) / sizeof(void *)) @@ -72,7 +72,7 @@ static int net_assign_generic(struct net *net, unsigned int id, void *data) BUG_ON(id < MIN_PERNET_OPS_ID); old_ng = rcu_dereference_protected(net->gen, - lockdep_is_held(&net_sem)); + lockdep_is_held(&pernet_ops_rwsem)); if (old_ng->s.len > id) { old_ng->ptr[id] = data; return 0; @@ -289,7 +289,7 @@ struct net *get_net_ns_by_id(struct net *net, int id) */ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns) { - /* Must be called with net_sem held */ + /* Must be called with pernet_ops_rwsem held */ const struct pernet_operations *ops, *saved_ops; int error = 0; LIST_HEAD(net_exit_list); @@ -422,13 +422,13 @@ struct net *copy_net_ns(unsigned long flags, net->ucounts = ucounts; get_user_ns(user_ns); - rv = down_read_killable(&net_sem); + rv = down_read_killable(&pernet_ops_rwsem); if (rv < 0) goto put_userns; rv = setup_net(net, user_ns); - up_read(&net_sem); + up_read(&pernet_ops_rwsem); if (rv < 0) { put_userns: @@ -480,7 +480,7 @@ static void cleanup_net(struct work_struct *work) /* Atomically snapshot the list of namespaces to cleanup */ net_kill_list = llist_del_all(&cleanup_list); - down_read(&net_sem); + down_read(&pernet_ops_rwsem); /* Don't let anyone else find us. */ rtnl_lock(); @@ -519,7 +519,7 @@ static void cleanup_net(struct work_struct *work) list_for_each_entry_reverse(ops, &pernet_list, list) ops_free_list(ops, &net_exit_list); - up_read(&net_sem); + up_read(&pernet_ops_rwsem); /* Ensure there are no outstanding rcu callbacks using this * network namespace. @@ -546,8 +546,8 @@ static void cleanup_net(struct work_struct *work) */ void net_ns_barrier(void) { - down_write(&net_sem); - up_write(&net_sem); + down_write(&pernet_ops_rwsem); + up_write(&pernet_ops_rwsem); } EXPORT_SYMBOL(net_ns_barrier); @@ -869,12 +869,12 @@ static int __init net_ns_init(void) rcu_assign_pointer(init_net.gen, ng); - down_write(&net_sem); + down_write(&pernet_ops_rwsem); if (setup_net(&init_net, &init_user_ns)) panic("Could not setup the initial network namespace"); init_net_initialized = true; - up_write(&net_sem); + up_write(&pernet_ops_rwsem); register_pernet_subsys(&net_ns_ops); @@ -1013,9 +1013,9 @@ static void unregister_pernet_operations(struct pernet_operations *ops) int register_pernet_subsys(struct pernet_operations *ops) { int error; - down_write(&net_sem); + down_write(&pernet_ops_rwsem); error = register_pernet_operations(first_device, ops); - up_write(&net_sem); + up_write(&pernet_ops_rwsem); return error; } EXPORT_SYMBOL_GPL(register_pernet_subsys); @@ -1031,9 +1031,9 @@ EXPORT_SYMBOL_GPL(register_pernet_subsys); */ void unregister_pernet_subsys(struct pernet_operations *ops) { - down_write(&net_sem); + down_write(&pernet_ops_rwsem); unregister_pernet_operations(ops); - up_write(&net_sem); + up_write(&pernet_ops_rwsem); } EXPORT_SYMBOL_GPL(unregister_pernet_subsys); @@ -1059,11 +1059,11 @@ EXPORT_SYMBOL_GPL(unregister_pernet_subsys); int register_pernet_device(struct pernet_operations *ops) { int error; - down_write(&net_sem); + down_write(&pernet_ops_rwsem); error = register_pernet_operations(&pernet_list, ops); if (!error && (first_device == &pernet_list)) first_device = &ops->list; - up_write(&net_sem); + up_write(&pernet_ops_rwsem); return error; } EXPORT_SYMBOL_GPL(register_pernet_device); @@ -1079,11 +1079,11 @@ EXPORT_SYMBOL_GPL(register_pernet_device); */ void unregister_pernet_device(struct pernet_operations *ops) { - down_write(&net_sem); + down_write(&pernet_ops_rwsem); if (&ops->list == first_device) first_device = first_device->next; unregister_pernet_operations(ops); - up_write(&net_sem); + up_write(&pernet_ops_rwsem); } EXPORT_SYMBOL_GPL(unregister_pernet_device); -- cgit v1.2.3