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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 21:50:47 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 21:50:47 +0400
commitc0e8a139a5bb8add02b4111e9e1957d810d7285e (patch)
treef5f0695c7553c0f651ea3c714191dedf76e06c78 /include/net
parent033d9959ed2dc1029217d4165f80a71702dc578e (diff)
parenta6f00298b2ceaf50b4ab00e6ee3eb0206ac72fac (diff)
downloadlinux-c0e8a139a5bb8add02b4111e9e1957d810d7285e.tar.xz
Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
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
Diffstat (limited to 'include/net')
-rw-r--r--include/net/cls_cgroup.h27
-rw-r--r--include/net/netprio_cgroup.h30
-rw-r--r--include/net/sock.h8
3 files changed, 25 insertions, 40 deletions
diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
index a4dc5b027bd9..b6a6eeb3905f 100644
--- a/include/net/cls_cgroup.h
+++ b/include/net/cls_cgroup.h
@@ -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 */
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
index 2719dec6b5a8..2760f4f4ae9b 100644
--- a/include/net/netprio_cgroup.h
+++ b/include/net/netprio_cgroup.h
@@ -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;
}
-#endif /* CONFIG_NETPRIO_CGROUP */
-
-#else
#define sock_update_netprioidx(sk, task)
-#endif
+
+#endif /* CONFIG_NETPRIO_CGROUP */
#endif /* _NET_CLS_CGROUP_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index adb7da20b5a1..6e6ec18fb6d0 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -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.