diff options
| -rw-r--r-- | include/net/sock.h | 59 | ||||
| -rw-r--r-- | net/core/sock.c | 61 |
2 files changed, 14 insertions, 106 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 9c55af8e5f81..e329d05f7995 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -47,6 +47,7 @@ #include <linux/module.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/pcounter.h> #include <linux/skbuff.h> /* struct sk_buff */ #include <linux/mm.h> #include <linux/security.h> @@ -565,14 +566,9 @@ struct proto { void (*unhash)(struct sock *sk); int (*get_port)(struct sock *sk, unsigned short snum); -#ifdef CONFIG_SMP /* Keeping track of sockets in use */ - void (*inuse_add)(struct proto *prot, int inc); - int (*inuse_getval)(const struct proto *prot); - int *inuse_ptr; -#else - int inuse; -#endif + struct pcounter inuse; + /* Memory pressure */ void (*enter_memory_pressure)(void); atomic_t *memory_allocated; /* Current allocated memory. */ @@ -607,35 +603,8 @@ struct proto { #endif }; -/* - * Special macros to let protos use a fast version of inuse{get|add} - * using a static percpu variable per proto instead of an allocated one, - * saving one dereference. - * This might be changed if/when dynamic percpu vars become fast. - */ -#ifdef CONFIG_SMP -# define DEFINE_PROTO_INUSE(NAME) \ -static DEFINE_PER_CPU(int, NAME##_inuse); \ -static void NAME##_inuse_add(struct proto *prot, int inc) \ -{ \ - __get_cpu_var(NAME##_inuse) += inc; \ -} \ - \ -static int NAME##_inuse_getval(const struct proto *prot)\ -{ \ - int res = 0, cpu; \ - \ - for_each_possible_cpu(cpu) \ - res += per_cpu(NAME##_inuse, cpu); \ - return res; \ -} -# define REF_PROTO_INUSE(NAME) \ - .inuse_add = NAME##_inuse_add, \ - .inuse_getval = NAME##_inuse_getval, -#else -# define DEFINE_PROTO_INUSE(NAME) -# define REF_PROTO_INUSE(NAME) -#endif +#define DEFINE_PROTO_INUSE(NAME) DEFINE_PCOUNTER(NAME) +#define REF_PROTO_INUSE(NAME) PCOUNTER_MEMBER_INITIALIZER(NAME, .inuse) extern int proto_register(struct proto *prot, int alloc_slab); extern void proto_unregister(struct proto *prot); @@ -668,29 +637,17 @@ static inline void sk_refcnt_debug_release(const struct sock *sk) /* Called with local bh disabled */ static __inline__ void sock_prot_inc_use(struct proto *prot) { -#ifdef CONFIG_SMP - prot->inuse_add(prot, 1); -#else - prot->inuse++; -#endif + pcounter_add(&prot->inuse, 1); } static __inline__ void sock_prot_dec_use(struct proto *prot) { -#ifdef CONFIG_SMP - prot->inuse_add(prot, -1); -#else - prot->inuse--; -#endif + pcounter_add(&prot->inuse, -1); } static __inline__ int sock_prot_inuse(struct proto *proto) { -#ifdef CONFIG_SMP - return proto->inuse_getval(proto); -#else - return proto->inuse; -#endif + return pcounter_getval(&proto->inuse); } /* With per-bucket locks this operation is not-atomic, so that diff --git a/net/core/sock.c b/net/core/sock.c index c9305a861760..eac7aa0721da 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1804,65 +1804,15 @@ EXPORT_SYMBOL(sk_common_release); static DEFINE_RWLOCK(proto_list_lock); static LIST_HEAD(proto_list); -#ifdef CONFIG_SMP -/* - * Define default functions to keep track of inuse sockets per protocol - * Note that often used protocols use dedicated functions to get a speed increase. - * (see DEFINE_PROTO_INUSE/REF_PROTO_INUSE) - */ -static void inuse_add(struct proto *prot, int inc) -{ - per_cpu_ptr(prot->inuse_ptr, smp_processor_id())[0] += inc; -} - -static int inuse_get(const struct proto *prot) -{ - int res = 0, cpu; - for_each_possible_cpu(cpu) - res += per_cpu_ptr(prot->inuse_ptr, cpu)[0]; - return res; -} - -static int inuse_init(struct proto *prot) -{ - if (!prot->inuse_getval || !prot->inuse_add) { - prot->inuse_ptr = alloc_percpu(int); - if (prot->inuse_ptr == NULL) - return -ENOBUFS; - - prot->inuse_getval = inuse_get; - prot->inuse_add = inuse_add; - } - return 0; -} - -static void inuse_fini(struct proto *prot) -{ - if (prot->inuse_ptr != NULL) { - free_percpu(prot->inuse_ptr); - prot->inuse_ptr = NULL; - prot->inuse_getval = NULL; - prot->inuse_add = NULL; - } -} -#else -static inline int inuse_init(struct proto *prot) -{ - return 0; -} - -static inline void inuse_fini(struct proto *prot) -{ -} -#endif - int proto_register(struct proto *prot, int alloc_slab) { char *request_sock_slab_name = NULL; char *timewait_sock_slab_name; - if (inuse_init(prot)) + if (pcounter_alloc(&prot->inuse) != 0) { + printk(KERN_CRIT "%s: Can't alloc inuse counters!\n", prot->name); goto out; + } if (alloc_slab) { prot->slab = kmem_cache_create(prot->name, prot->obj_size, 0, @@ -1930,7 +1880,7 @@ out_free_sock_slab: kmem_cache_destroy(prot->slab); prot->slab = NULL; out_free_inuse: - inuse_fini(prot); + pcounter_free(&prot->inuse); out: return -ENOBUFS; } @@ -1943,7 +1893,8 @@ void proto_unregister(struct proto *prot) list_del(&prot->node); write_unlock(&proto_list_lock); - inuse_fini(prot); + pcounter_free(&prot->inuse); + if (prot->slab != NULL) { kmem_cache_destroy(prot->slab); prot->slab = NULL; |