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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-03 13:05:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-03 13:05:42 -0700
commit32d01dc7be4e725ab85ce1d74e8f4adc02ad68dd (patch)
tree213fe7d76b315413fe551332423fb2f6dfae59b9 /net
parent68114e5eb862ad0a7a261b91497281b026102715 (diff)
parent1ec41830e087cda1f62dda4182c2b62811eb0ffc (diff)
downloadlinux-32d01dc7be4e725ab85ce1d74e8f4adc02ad68dd.tar.gz
Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo: "A lot updates for cgroup: - The biggest one is cgroup's conversion to kernfs. cgroup took after the long abandoned vfs-entangled sysfs implementation and made it even more convoluted over time. cgroup's internal objects were fused with vfs objects which also brought in vfs locking and object lifetime rules. Naturally, there are places where vfs rules don't fit and nasty hacks, such as credential switching or lock dance interleaving inode mutex and cgroup_mutex with object serial number comparison thrown in to decide whether the operation is actually necessary, needed to be employed. After conversion to kernfs, internal object lifetime and locking rules are mostly isolated from vfs interactions allowing shedding of several nasty hacks and overall simplification. This will also allow implmentation of operations which may affect multiple cgroups which weren't possible before as it would have required nesting i_mutexes. - Various simplifications including dropping of module support, easier cgroup name/path handling, simplified cgroup file type handling and task_cg_lists optimization. - Prepatory changes for the planned unified hierarchy, which is still a patchset away from being actually operational. The dummy hierarchy is updated to serve as the default unified hierarchy. Controllers which aren't claimed by other hierarchies are associated with it, which BTW was what the dummy hierarchy was for anyway. - Various fixes from Li and others. This pull request includes some patches to add missing slab.h to various subsystems. This was triggered xattr.h include removal from cgroup.h. cgroup.h indirectly got included a lot of files which brought in xattr.h which brought in slab.h. There are several merge commits - one to pull in kernfs updates necessary for converting cgroup (already in upstream through driver-core), others for interfering changes in the fixes branch" * 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (74 commits) cgroup: remove useless argument from cgroup_exit() cgroup: fix spurious lockdep warning in cgroup_exit() cgroup: Use RCU_INIT_POINTER(x, NULL) in cgroup.c cgroup: break kernfs active_ref protection in cgroup directory operations cgroup: fix cgroup_taskset walking order cgroup: implement CFTYPE_ONLY_ON_DFL cgroup: make cgrp_dfl_root mountable cgroup: drop const from @buffer of cftype->write_string() cgroup: rename cgroup_dummy_root and related names cgroup: move ->subsys_mask from cgroupfs_root to cgroup cgroup: treat cgroup_dummy_root as an equivalent hierarchy during rebinding cgroup: remove NULL checks from [pr_cont_]cgroup_{name|path}() cgroup: use cgroup_setup_root() to initialize cgroup_dummy_root cgroup: reorganize cgroup bootstrapping cgroup: relocate setting of CGRP_DEAD cpuset: use rcu_read_lock() to protect task_cs() cgroup_freezer: document freezer_fork() subtleties cgroup: update cgroup_transfer_tasks() to either succeed or fail cgroup: drop task_lock() protection around task->cgroups cgroup: update how a newly forked task gets associated with css_set ...
Diffstat (limited to 'net')
-rw-r--r--net/Kconfig2
-rw-r--r--net/core/netclassid_cgroup.c15
-rw-r--r--net/core/netprio_cgroup.c41
-rw-r--r--net/ipv4/tcp_memcontrol.c4
4 files changed, 11 insertions, 51 deletions
diff --git a/net/Kconfig b/net/Kconfig
index d1f6f968fc0..d92afe4204d 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -243,7 +243,7 @@ config XPS
default y
config CGROUP_NET_PRIO
- tristate "Network priority cgroup"
+ bool "Network priority cgroup"
depends on CGROUPS
---help---
Cgroup subsystem for use in assigning processes to network priorities on
diff --git a/net/core/netclassid_cgroup.c b/net/core/netclassid_cgroup.c
index 719efd54166..22931e1b99b 100644
--- a/net/core/netclassid_cgroup.c
+++ b/net/core/netclassid_cgroup.c
@@ -23,7 +23,7 @@ static inline struct cgroup_cls_state *css_cls_state(struct cgroup_subsys_state
struct cgroup_cls_state *task_cls_state(struct task_struct *p)
{
- return css_cls_state(task_css(p, net_cls_subsys_id));
+ return css_cls_state(task_css(p, net_cls_cgrp_id));
}
EXPORT_SYMBOL_GPL(task_cls_state);
@@ -73,7 +73,7 @@ static void cgrp_attach(struct cgroup_subsys_state *css,
void *v = (void *)(unsigned long)cs->classid;
struct task_struct *p;
- cgroup_taskset_for_each(p, css, tset) {
+ cgroup_taskset_for_each(p, tset) {
task_lock(p);
iterate_fd(p->files, 0, update_classid, v);
task_unlock(p);
@@ -102,19 +102,10 @@ static struct cftype ss_files[] = {
{ } /* terminate */
};
-struct cgroup_subsys net_cls_subsys = {
- .name = "net_cls",
+struct cgroup_subsys net_cls_cgrp_subsys = {
.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/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 9043caedcd0..3825f669147 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -186,7 +186,7 @@ static int read_priomap(struct seq_file *sf, void *v)
}
static int write_priomap(struct cgroup_subsys_state *css, struct cftype *cft,
- const char *buffer)
+ char *buffer)
{
char devname[IFNAMSIZ + 1];
struct net_device *dev;
@@ -224,7 +224,7 @@ static void net_prio_attach(struct cgroup_subsys_state *css,
struct task_struct *p;
void *v = (void *)(unsigned long)css->cgroup->id;
- cgroup_taskset_for_each(p, css, tset) {
+ cgroup_taskset_for_each(p, tset) {
task_lock(p);
iterate_fd(p->files, 0, update_netprio, v);
task_unlock(p);
@@ -244,15 +244,12 @@ static struct cftype ss_files[] = {
{ } /* terminate */
};
-struct cgroup_subsys net_prio_subsys = {
- .name = "net_prio",
+struct cgroup_subsys net_prio_cgrp_subsys = {
.css_alloc = cgrp_css_alloc,
.css_online = cgrp_css_online,
.css_free = cgrp_css_free,
.attach = net_prio_attach,
- .subsys_id = net_prio_subsys_id,
.base_cftypes = ss_files,
- .module = THIS_MODULE,
};
static int netprio_device_event(struct notifier_block *unused,
@@ -283,37 +280,9 @@ static struct notifier_block netprio_device_notifier = {
static int __init init_cgroup_netprio(void)
{
- int ret;
-
- ret = cgroup_load_subsys(&net_prio_subsys);
- if (ret)
- goto out;
-
register_netdevice_notifier(&netprio_device_notifier);
-
-out:
- return ret;
-}
-
-static void __exit exit_cgroup_netprio(void)
-{
- struct netprio_map *old;
- struct net_device *dev;
-
- unregister_netdevice_notifier(&netprio_device_notifier);
-
- cgroup_unload_subsys(&net_prio_subsys);
-
- rtnl_lock();
- for_each_netdev(&init_net, dev) {
- old = rtnl_dereference(dev->priomap);
- RCU_INIT_POINTER(dev->priomap, NULL);
- if (old)
- kfree_rcu(old, rcu);
- }
- rtnl_unlock();
+ return 0;
}
-module_init(init_cgroup_netprio);
-module_exit(exit_cgroup_netprio);
+subsys_initcall(init_cgroup_netprio);
MODULE_LICENSE("GPL v2");
diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c
index f7e522c558b..d4f015ad6c8 100644
--- a/net/ipv4/tcp_memcontrol.c
+++ b/net/ipv4/tcp_memcontrol.c
@@ -103,7 +103,7 @@ static int tcp_update_limit(struct mem_cgroup *memcg, u64 val)
}
static int tcp_cgroup_write(struct cgroup_subsys_state *css, struct cftype *cft,
- const char *buffer)
+ char *buffer)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
unsigned long long val;
@@ -219,7 +219,7 @@ static struct cftype tcp_files[] = {
static int __init tcp_memcontrol_init(void)
{
- WARN_ON(cgroup_add_cftypes(&mem_cgroup_subsys, tcp_files));
+ WARN_ON(cgroup_add_cftypes(&memory_cgrp_subsys, tcp_files));
return 0;
}
__initcall(tcp_memcontrol_init);