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authorPavel Emelyanov <xemul@parallels.com>2011-12-06 07:57:26 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-06 13:58:01 -0500
commit37f352b5e3e89337f7a9a3a90250b5dde3c5f40d (patch)
treeb7a6b0528e7715b08741d16ab2fd9102da99ad21
parentsock_diag: Introduce new message type (diff)
downloadlinux-dev-37f352b5e3e89337f7a9a3a90250b5dde3c5f40d.tar.xz
linux-dev-37f352b5e3e89337f7a9a3a90250b5dde3c5f40d.zip
inet_diag: Move byte-code finding up the call-stack
Current code calculates it at fixed offset. This offset will change, so move the BC calculation upper to make the further patching simpler. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/inet_diag.c36
1 files changed, 17 insertions, 19 deletions
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index eb6bdfa9480c..7aad6ad24dda 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -488,15 +488,13 @@ static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
static int inet_csk_diag_dump(struct sock *sk,
struct sk_buff *skb,
- struct netlink_callback *cb)
+ struct netlink_callback *cb,
+ const struct nlattr *bc)
{
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
- if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
+ if (bc != NULL) {
struct inet_diag_entry entry;
- const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
- sizeof(*r),
- INET_DIAG_REQ_BYTECODE);
struct inet_sock *inet = inet_sk(sk);
entry.family = sk->sk_family;
@@ -527,15 +525,13 @@ static int inet_csk_diag_dump(struct sock *sk,
static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
struct sk_buff *skb,
- struct netlink_callback *cb)
+ struct netlink_callback *cb,
+ const struct nlattr *bc)
{
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
- if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
+ if (bc != NULL) {
struct inet_diag_entry entry;
- const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
- sizeof(*r),
- INET_DIAG_REQ_BYTECODE);
entry.family = tw->tw_family;
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
@@ -616,13 +612,13 @@ nlmsg_failure:
}
static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
+ struct netlink_callback *cb,
+ const struct nlattr *bc)
{
struct inet_diag_entry entry;
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
struct inet_connection_sock *icsk = inet_csk(sk);
struct listen_sock *lopt;
- const struct nlattr *bc = NULL;
struct inet_sock *inet = inet_sk(sk);
int j, s_j;
int reqnum, s_reqnum;
@@ -642,9 +638,7 @@ static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
if (!lopt || !lopt->qlen)
goto out;
- if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
- bc = nlmsg_find_attr(cb->nlh, sizeof(*r),
- INET_DIAG_REQ_BYTECODE);
+ if (bc != NULL) {
entry.sport = inet->inet_num;
entry.userlocks = sk->sk_userlocks;
}
@@ -708,6 +702,10 @@ static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
const struct inet_diag_handler *handler;
struct inet_hashinfo *hashinfo;
+ const struct nlattr *bc = NULL;
+
+ if (nlmsg_attrlen(cb->nlh, sizeof(struct inet_diag_req)))
+ bc = nlmsg_find_attr(cb->nlh, sizeof(*r), INET_DIAG_REQ_BYTECODE);
handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
if (IS_ERR(handler))
@@ -747,7 +745,7 @@ static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
cb->args[3] > 0)
goto syn_recv;
- if (inet_csk_diag_dump(sk, skb, cb) < 0) {
+ if (inet_csk_diag_dump(sk, skb, cb, bc) < 0) {
spin_unlock_bh(&ilb->lock);
goto done;
}
@@ -756,7 +754,7 @@ syn_recv:
if (!(r->idiag_states & TCPF_SYN_RECV))
goto next_listen;
- if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
+ if (inet_diag_dump_reqs(skb, sk, cb, bc) < 0) {
spin_unlock_bh(&ilb->lock);
goto done;
}
@@ -809,7 +807,7 @@ skip_listen_ht:
if (r->id.idiag_dport != inet->inet_dport &&
r->id.idiag_dport)
goto next_normal;
- if (inet_csk_diag_dump(sk, skb, cb) < 0) {
+ if (inet_csk_diag_dump(sk, skb, cb, bc) < 0) {
spin_unlock_bh(lock);
goto done;
}
@@ -831,7 +829,7 @@ next_normal:
if (r->id.idiag_dport != tw->tw_dport &&
r->id.idiag_dport)
goto next_dying;
- if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
+ if (inet_twsk_diag_dump(tw, skb, cb, bc) < 0) {
spin_unlock_bh(lock);
goto done;
}