diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/Kconfig | 7 | ||||
| -rw-r--r-- | net/core/Makefile | 1 | ||||
| -rw-r--r-- | net/core/netclassid_cgroup.c | 120 | ||||
| -rw-r--r-- | net/core/sock.c | 12 | ||||
| -rw-r--r-- | net/sched/Kconfig | 1 | ||||
| -rw-r--r-- | net/sched/cls_cgroup.c | 111 |
6 files changed, 130 insertions, 122 deletions
diff --git a/net/Kconfig b/net/Kconfig index d334678..7da10b8 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -245,6 +245,13 @@ config NETPRIO_CGROUP Cgroup subsystem for use in assigning processes to network priorities on a per-interface basis +config CGROUP_NET_CLASSID + boolean "Network classid cgroup" + depends on CGROUPS + ---help--- + Cgroup subsystem for use as general purpose socket classid marker that is + being used in cls_cgroup and for netfilter matching. + config NET_RX_BUSY_POLL boolean default y diff --git a/net/core/Makefile b/net/core/Makefile index b33b996..4839a27 100644 --- a/net/core/Makefile +++ b/net/core/Makefile @@ -22,3 +22,4 @@ obj-$(CONFIG_TRACEPOINTS) += net-traces.o obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o obj-$(CONFIG_NETPRIO_CGROUP) += netprio_cgroup.o +obj-$(CONFIG_CGROUP_NET_CLASSID) += netclassid_cgroup.o diff --git a/net/core/netclassid_cgroup.c b/net/core/netclassid_cgroup.c new file mode 100644 index 0000000..719efd5 --- /dev/null +++ b/net/core/netclassid_cgroup.c @@ -0,0 +1,120 @@ +/* + * net/core/netclassid_cgroup.c Classid Cgroupfs Handling + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: Thomas Graf <tgraf@suug.ch> + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/cgroup.h> +#include <linux/fdtable.h> +#include <net/cls_cgroup.h> +#include <net/sock.h> + +static inline struct cgroup_cls_state *css_cls_state(struct cgroup_subsys_state *css) +{ + return css ? container_of(css, struct cgroup_cls_state, css) : NULL; +} + +struct cgroup_cls_state *task_cls_state(struct task_struct *p) +{ + return css_cls_state(task_css(p, net_cls_subsys_id)); +} +EXPORT_SYMBOL_GPL(task_cls_state); + +static struct cgroup_subsys_state * +cgrp_css_alloc(struct cgroup_subsys_state *parent_css) +{ + struct cgroup_cls_state *cs; + + cs = kzalloc(sizeof(*cs), GFP_KERNEL); + if (!cs) + return ERR_PTR(-ENOMEM); + + return &cs->css; +} + +static int cgrp_css_online(struct cgroup_subsys_state *css) +{ + struct cgroup_cls_state *cs = css_cls_state(css); + struct cgroup_cls_state *parent = css_cls_state(css_parent(css)); + + if (parent) + cs->classid = parent->classid; + + return 0; +} + +static void cgrp_css_free(struct cgroup_subsys_state *css) +{ + kfree(css_cls_state(css)); +} + +static int update_classid(const void *v, struct file *file, unsigned n) +{ + int err; + struct socket *sock = sock_from_file(file, &err); + + if (sock) + sock->sk->sk_classid = (u32)(unsigned long)v; + + return 0; +} + +static void cgrp_attach(struct cgroup_subsys_state *css, + struct cgroup_taskset *tset) +{ + struct cgroup_cls_state *cs = css_cls_state(css); + void *v = (void *)(unsigned long)cs->classid; + struct task_struct *p; + + cgroup_taskset_for_each(p, css, tset) { + task_lock(p); + iterate_fd(p->files, 0, update_classid, v); + task_unlock(p); + } +} + +static u64 read_classid(struct cgroup_subsys_state *css, struct cftype *cft) +{ + return css_cls_state(css)->classid; +} + +static int write_classid(struct cgroup_subsys_state *css, struct cftype *cft, + u64 value) +{ + css_cls_state(css)->classid = (u32) value; + + return 0; +} + +static struct cftype ss_files[] = { + { + .name = "classid", + .read_u64 = read_classid, + .write_u64 = write_classid, + }, + { } /* terminate */ +}; + +struct cgroup_subsys net_cls_subsys = { + .name = "net_cls", + .css_alloc = cgrp_css_alloc, + .css_online = cgrp_css_online, + .css_free = cgrp_css_free, + .attach = cgrp_attach, + .subsys_id = net_cls_subsys_id, + .base_cftypes = ss_files, + .module = THIS_MODULE, +}; + +static int __init init_netclassid_cgroup(void) +{ + return cgroup_load_subsys(&net_cls_subsys); +} +__initcall(init_netclassid_cgroup); diff --git a/net/core/sock.c b/net/core/sock.c index ab20ed9..3f15072 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1308,18 +1308,6 @@ static void sk_prot_free(struct proto *prot, struct sock *sk) module_put(owner); } -#if IS_ENABLED(CONFIG_NET_CLS_CGROUP) -void sock_update_classid(struct sock *sk) -{ - u32 classid; - - classid = task_cls_classid(current); - if (classid != sk->sk_classid) - sk->sk_classid = classid; -} -EXPORT_SYMBOL(sock_update_classid); -#endif - #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) void sock_update_netprioidx(struct sock *sk) { diff --git a/net/sched/Kconfig b/net/sched/Kconfig index ad1f1d8..f711a47 100644 --- a/net/sched/Kconfig +++ b/net/sched/Kconfig @@ -435,6 +435,7 @@ config NET_CLS_FLOW config NET_CLS_CGROUP tristate "Control Group Classifier" select NET_CLS + select CGROUP_NET_CLASSID depends on CGROUPS ---help--- Say Y here if you want to classify packets based on the control diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c index 16006c9..838fa40 100644 --- a/net/sched/cls_cgroup.c +++ b/net/sched/cls_cgroup.c @@ -11,109 +11,13 @@ #include <linux/module.h> #include <linux/slab.h> -#include <linux/types.h> -#include <linux/string.h> -#include <linux/errno.h> #include <linux/skbuff.h> -#include <linux/cgroup.h> #include <linux/rcupdate.h> -#include <linux/fdtable.h> #include <net/rtnetlink.h> #include <net/pkt_cls.h> #include <net/sock.h> #include <net/cls_cgroup.h> -static inline struct cgroup_cls_state *css_cls_state(struct cgroup_subsys_state *css) -{ - return css ? container_of(css, struct cgroup_cls_state, css) : NULL; -} - -static inline struct cgroup_cls_state *task_cls_state(struct task_struct *p) -{ - return css_cls_state(task_css(p, net_cls_subsys_id)); -} - -static struct cgroup_subsys_state * -cgrp_css_alloc(struct cgroup_subsys_state *parent_css) -{ - struct cgroup_cls_state *cs; - - cs = kzalloc(sizeof(*cs), GFP_KERNEL); - if (!cs) - return ERR_PTR(-ENOMEM); - return &cs->css; -} - -static int cgrp_css_online(struct cgroup_subsys_state *css) -{ - struct cgroup_cls_state *cs = css_cls_state(css); - struct cgroup_cls_state *parent = css_cls_state(css_parent(css)); - - if (parent) - cs->classid = parent->classid; - return 0; -} - -static void cgrp_css_free(struct cgroup_subsys_state *css) -{ - kfree(css_cls_state(css)); -} - -static int update_classid(const void *v, struct file *file, unsigned n) -{ - int err; - struct socket *sock = sock_from_file(file, &err); - if (sock) - sock->sk->sk_classid = (u32)(unsigned long)v; - return 0; -} - -static void cgrp_attach(struct cgroup_subsys_state *css, - struct cgroup_taskset *tset) -{ - struct task_struct *p; - struct cgroup_cls_state *cs = css_cls_state(css); - void *v = (void *)(unsigned long)cs->classid; - - cgroup_taskset_for_each(p, css, tset) { - task_lock(p); - iterate_fd(p->files, 0, update_classid, v); - task_unlock(p); - } -} - -static u64 read_classid(struct cgroup_subsys_state *css, struct cftype *cft) -{ - return css_cls_state(css)->classid; -} - -static int write_classid(struct cgroup_subsys_state *css, struct cftype *cft, - u64 value) -{ - css_cls_state(css)->classid = (u32) value; - return 0; -} - -static struct cftype ss_files[] = { - { - .name = "classid", - .read_u64 = read_classid, - .write_u64 = write_classid, - }, - { } /* terminate */ -}; - -struct cgroup_subsys net_cls_subsys = { - .name = "net_cls", - .css_alloc = cgrp_css_alloc, - .css_online = cgrp_css_online, - .css_free = cgrp_css_free, - .attach = cgrp_attach, - .subsys_id = net_cls_subsys_id, - .base_cftypes = ss_files, - .module = THIS_MODULE, -}; - struct cls_cgroup_head { u32 handle; struct tcf_exts exts; @@ -309,25 +213,12 @@ static struct tcf_proto_ops cls_cgroup_ops __read_mostly = { static int __init init_cgroup_cls(void) { - int ret; - - ret = cgroup_load_subsys(&net_cls_subsys); - if (ret) - goto out; - - ret = register_tcf_proto_ops(&cls_cgroup_ops); - if (ret) - cgroup_unload_subsys(&net_cls_subsys); - -out: - return ret; + return register_tcf_proto_ops(&cls_cgroup_ops); } static void __exit exit_cgroup_cls(void) { unregister_tcf_proto_ops(&cls_cgroup_ops); - - cgroup_unload_subsys(&net_cls_subsys); } module_init(init_cgroup_cls); |