xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Browse Source 
Pull cgroup updates from Tejun Heo:

 - xattr support added.  The implementation is shared with tmpfs.  The
   usage is restricted and intended to be used to manage per-cgroup
   metadata by system software.  tmpfs changes are routed through this
   branch with Hugh's permission.

 - cgroup subsystem ID handling simplified.

* 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Define CGROUP_SUBSYS_COUNT according the configuration
  cgroup: Assign subsystem IDs during compile time
  cgroup: Do not depend on a given order when populating the subsys array
  cgroup: Wrap subsystem selection macro
  cgroup: Remove CGROUP_BUILTIN_SUBSYS_COUNT
  cgroup: net_prio: Do not define task_netpioidx() when not selected
  cgroup: net_cls: Do not define task_cls_classid() when not selected
  cgroup: net_cls: Move sock_update_classid() declaration to cls_cgroup.h
  cgroup: trivial fixes for Documentation/cgroups/cgroups.txt
  xattr: mark variable as uninitialized to make both gcc and smatch happy
  fs: add missing documentation to simple_xattr functions
  cgroup: add documentation on extended attributes usage
  cgroup: rename subsys_bits to subsys_mask
  cgroup: add xattr support
  cgroup: revise how we re-populate root directory
  xattr: extract simple_xattr code from tmpfs
This commit is contained in:
Linus Torvalds
2012-10-02 10:50:47 -07:00
parent 033d9959ed a6f00298b2
commit c0e8a139a5
15 changed files with 575 additions and 393 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
include/net/cls_cgroup.h
View File

@@ -17,14 +17,16 @@
#include <linux/hardirq.h>
#include <linux/rcupdate.h>
#ifdef CONFIG_CGROUPS
#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
struct cgroup_cls_state
{
struct cgroup_subsys_state css;
u32 classid;
};
#ifdef CONFIG_NET_CLS_CGROUP
extern void sock_update_classid(struct sock *sk);
#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
static inline u32 task_cls_classid(struct task_struct *p)
{
int classid;
@@ -39,32 +41,33 @@ static inline u32 task_cls_classid(struct task_struct *p)
return classid;
}
#else
extern int net_cls_subsys_id;
#elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
static inline u32 task_cls_classid(struct task_struct *p)
{
int id;
struct cgroup_subsys_state *css;
u32 classid = 0;
if (in_interrupt())
return 0;
rcu_read_lock();
id = rcu_dereference_index_check(net_cls_subsys_id,
rcu_read_lock_held());
if (id >= 0)
classid = container_of(task_subsys_state(p, id),
css = task_subsys_state(p, net_cls_subsys_id);
if (css)
classid = container_of(css,
struct cgroup_cls_state, css)->classid;
rcu_read_unlock();
return classid;
}
#endif
#else
#else /* !CGROUP_NET_CLS_CGROUP */
static inline void sock_update_classid(struct sock *sk)
{
}
static inline u32 task_cls_classid(struct task_struct *p)
{
return 0;
}
#endif
#endif /* CGROUP_NET_CLS_CGROUP */
#endif /* _NET_CLS_CGROUP_H */

30
include/net/netprio_cgroup.h
View File

@@ -18,23 +18,18 @@
#include <linux/rcupdate.h>
#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
struct netprio_map {
struct rcu_head rcu;
u32 priomap_len;
u32 priomap[];
};
#ifdef CONFIG_CGROUPS
struct cgroup_netprio_state {
struct cgroup_subsys_state css;
u32 prioidx;
};
#ifndef CONFIG_NETPRIO_CGROUP
extern int net_prio_subsys_id;
#endif
extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
#if IS_BUILTIN(CONFIG_NETPRIO_CGROUP)
@@ -56,33 +51,28 @@ static inline u32 task_netprioidx(struct task_struct *p)
static inline u32 task_netprioidx(struct task_struct *p)
{
struct cgroup_netprio_state *state;
int subsys_id;
struct cgroup_subsys_state *css;
u32 idx = 0;
rcu_read_lock();
subsys_id = rcu_dereference_index_check(net_prio_subsys_id,
rcu_read_lock_held());
if (subsys_id >= 0) {
state = container_of(task_subsys_state(p, subsys_id),
struct cgroup_netprio_state, css);
idx = state->prioidx;
}
css = task_subsys_state(p, net_prio_subsys_id);
if (css)
idx = container_of(css,
struct cgroup_netprio_state, css)->prioidx;
rcu_read_unlock();
return idx;
}
#endif
#else
#else /* !CONFIG_NETPRIO_CGROUP */
static inline u32 task_netprioidx(struct task_struct *p)
{
return 0;
}
#define sock_update_netprioidx(sk, task)
#endif /* CONFIG_NETPRIO_CGROUP */
#else
#define sock_update_netprioidx(sk, task)
#endif
#endif /* _NET_CLS_CGROUP_H */

8
include/net/sock.h
View File

@@ -1486,14 +1486,6 @@ extern void *sock_kmalloc(struct sock *sk, int size,
extern void sock_kfree_s(struct sock *sk, void *mem, int size);
extern void sk_send_sigurg(struct sock *sk);
#ifdef CONFIG_CGROUPS
extern void sock_update_classid(struct sock *sk);
#else
static inline void sock_update_classid(struct sock *sk)
{
}
#endif
/*
* Functions to fill in entries in struct proto_ops when a protocol
* does not implement a particular function.