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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-11-21 22:08:50 +0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:54:40 -0800
commitebb53d75657f86587ac8cf3e38ab0c860a8e3d4f (patch)
tree2b1d63cb8ee54b19589d6d13a693147001e642ad /net/core/sock.c
parentde4d1db369785c29d68915edfee0cb70e8199f4c (diff)
[NET] proto: Use pcounters for the inuse field
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
-rw-r--r--net/core/sock.c61
1 files changed, 6 insertions, 55 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index c9305a86176..eac7aa0721d 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;