diff options
| -rw-r--r-- | Documentation/networking/mptcp-sysctl.rst | 19 | ||||
| -rw-r--r-- | net/mptcp/ctrl.c | 50 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 1 |
3 files changed, 70 insertions, 0 deletions
diff --git a/Documentation/networking/mptcp-sysctl.rst b/Documentation/networking/mptcp-sysctl.rst index 03e1d3610333..b78a2254d452 100644 --- a/Documentation/networking/mptcp-sysctl.rst +++ b/Documentation/networking/mptcp-sysctl.rst @@ -72,6 +72,23 @@ enabled - BOOLEAN Default: 1 (enabled) +path_manager - STRING + Set the default path manager name to use for each new MPTCP + socket. In-kernel path management will control subflow + connections and address advertisements according to + per-namespace values configured over the MPTCP netlink + API. Userspace path management puts per-MPTCP-connection subflow + connection decisions and address advertisements under control of + a privileged userspace program, at the cost of more netlink + traffic to propagate all of the related events and commands. + + This is a per-namespace sysctl. + + * "kernel" - In-kernel path manager + * "userspace" - Userspace path manager + + Default: "kernel" + pm_type - INTEGER Set the default path manager type to use for each new MPTCP socket. In-kernel path management will control subflow @@ -84,6 +101,8 @@ pm_type - INTEGER This is a per-namespace sysctl. + Deprecated since v6.15, use path_manager instead. + * 0 - In-kernel path manager * 1 - Userspace path manager diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c index be6c0237e10b..4209dc7f9704 100644 --- a/net/mptcp/ctrl.c +++ b/net/mptcp/ctrl.c @@ -39,6 +39,7 @@ struct mptcp_pernet { u8 allow_join_initial_addr_port; u8 pm_type; char scheduler[MPTCP_SCHED_NAME_MAX]; + char path_manager[MPTCP_PM_NAME_MAX]; }; static struct mptcp_pernet *mptcp_get_pernet(const struct net *net) @@ -83,6 +84,11 @@ int mptcp_get_pm_type(const struct net *net) return mptcp_get_pernet(net)->pm_type; } +const char *mptcp_get_path_manager(const struct net *net) +{ + return mptcp_get_pernet(net)->path_manager; +} + const char *mptcp_get_scheduler(const struct net *net) { return mptcp_get_pernet(net)->scheduler; @@ -101,6 +107,7 @@ static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet) pernet->stale_loss_cnt = 4; pernet->pm_type = MPTCP_PM_TYPE_KERNEL; strscpy(pernet->scheduler, "default", sizeof(pernet->scheduler)); + strscpy(pernet->path_manager, "kernel", sizeof(pernet->path_manager)); } #ifdef CONFIG_SYSCTL @@ -174,6 +181,42 @@ static int proc_blackhole_detect_timeout(const struct ctl_table *table, return ret; } +static int mptcp_set_path_manager(char *path_manager, const char *name) +{ + struct mptcp_pm_ops *pm_ops; + int ret = 0; + + rcu_read_lock(); + pm_ops = mptcp_pm_find(name); + if (pm_ops) + strscpy(path_manager, name, MPTCP_PM_NAME_MAX); + else + ret = -ENOENT; + rcu_read_unlock(); + + return ret; +} + +static int proc_path_manager(const struct ctl_table *ctl, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + char (*path_manager)[MPTCP_PM_NAME_MAX] = ctl->data; + char pm_name[MPTCP_PM_NAME_MAX]; + const struct ctl_table tbl = { + .data = pm_name, + .maxlen = MPTCP_PM_NAME_MAX, + }; + int ret; + + strscpy(pm_name, *path_manager, MPTCP_PM_NAME_MAX); + + ret = proc_dostring(&tbl, write, buffer, lenp, ppos); + if (write && ret == 0) + ret = mptcp_set_path_manager(*path_manager, pm_name); + + return ret; +} + static struct ctl_table mptcp_sysctl_table[] = { { .procname = "enabled", @@ -253,6 +296,12 @@ static struct ctl_table mptcp_sysctl_table[] = { .mode = 0644, .proc_handler = proc_dou8vec_minmax, }, + { + .procname = "path_manager", + .maxlen = MPTCP_PM_NAME_MAX, + .mode = 0644, + .proc_handler = proc_path_manager, + }, }; static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet) @@ -278,6 +327,7 @@ static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet) table[8].data = &pernet->close_timeout; table[9].data = &pernet->blackhole_timeout; table[10].data = &pernet->syn_retrans_before_tcp_fallback; + table[11].data = &pernet->path_manager; hdr = register_net_sysctl_sz(net, MPTCP_SYSCTL_PATH, table, ARRAY_SIZE(mptcp_sysctl_table)); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index c9e435a1fd7c..818c2c648677 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -699,6 +699,7 @@ int mptcp_allow_join_id0(const struct net *net); unsigned int mptcp_stale_loss_cnt(const struct net *net); unsigned int mptcp_close_timeout(const struct sock *sk); int mptcp_get_pm_type(const struct net *net); +const char *mptcp_get_path_manager(const struct net *net); const char *mptcp_get_scheduler(const struct net *net); void mptcp_active_disable(struct sock *sk); |