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| author | David S. Miller <davem@davemloft.net> | 2010-12-17 12:27:22 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-17 12:27:22 -0800 |
| commit | b4aa9e05a61b845541fa6f5b1d246976922601f0 (patch) | |
| tree | ca94478c3df281ab76a3399f5ba6341ade3f5791 /net/core/sock.c | |
| parent | 1dc0f3c54ce1df957f99c17b145488fd03eb1a59 (diff) | |
| parent | 4b8fe66300acb2fba8b16d62606e0d30204022fc (diff) | |
| download | kernel_samsung_smdk4412-b4aa9e05a61b845541fa6f5b1d246976922601f0.zip kernel_samsung_smdk4412-b4aa9e05a61b845541fa6f5b1d246976922601f0.tar.gz kernel_samsung_smdk4412-b4aa9e05a61b845541fa6f5b1d246976922601f0.tar.bz2 | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/bnx2x/bnx2x.h
drivers/net/wireless/iwlwifi/iwl-1000.c
drivers/net/wireless/iwlwifi/iwl-6000.c
drivers/net/wireless/iwlwifi/iwl-core.h
drivers/vhost/vhost.c
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 47 |
1 files changed, 35 insertions, 12 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index bcdb6ff..a6b9e80 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1010,6 +1010,36 @@ static void sock_copy(struct sock *nsk, const struct sock *osk) #endif } +/* + * caches using SLAB_DESTROY_BY_RCU should let .next pointer from nulls nodes + * un-modified. Special care is taken when initializing object to zero. + */ +static inline void sk_prot_clear_nulls(struct sock *sk, int size) +{ + if (offsetof(struct sock, sk_node.next) != 0) + memset(sk, 0, offsetof(struct sock, sk_node.next)); + memset(&sk->sk_node.pprev, 0, + size - offsetof(struct sock, sk_node.pprev)); +} + +void sk_prot_clear_portaddr_nulls(struct sock *sk, int size) +{ + unsigned long nulls1, nulls2; + + nulls1 = offsetof(struct sock, __sk_common.skc_node.next); + nulls2 = offsetof(struct sock, __sk_common.skc_portaddr_node.next); + if (nulls1 > nulls2) + swap(nulls1, nulls2); + + if (nulls1 != 0) + memset((char *)sk, 0, nulls1); + memset((char *)sk + nulls1 + sizeof(void *), 0, + nulls2 - nulls1 - sizeof(void *)); + memset((char *)sk + nulls2 + sizeof(void *), 0, + size - nulls2 - sizeof(void *)); +} +EXPORT_SYMBOL(sk_prot_clear_portaddr_nulls); + static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority, int family) { @@ -1022,19 +1052,12 @@ static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority, if (!sk) return sk; if (priority & __GFP_ZERO) { - /* - * caches using SLAB_DESTROY_BY_RCU should let - * sk_node.next un-modified. Special care is taken - * when initializing object to zero. - */ - if (offsetof(struct sock, sk_node.next) != 0) - memset(sk, 0, offsetof(struct sock, sk_node.next)); - memset(&sk->sk_node.pprev, 0, - prot->obj_size - offsetof(struct sock, - sk_node.pprev)); + if (prot->clear_sk) + prot->clear_sk(sk, prot->obj_size); + else + sk_prot_clear_nulls(sk, prot->obj_size); } - } - else + } else sk = kmalloc(prot->obj_size, priority); if (sk != NULL) { |