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authorThomas Graf <tgraf@suug.ch>2007-08-22 13:56:23 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:48:21 -0700
commitc26445acbc292ab0466407db6d3bdcc5cbe1d03b (patch)
tree15cc1f7b56929ffd269d5960d130e5c30c47277b
parentc0144beaeca42b643f4d1632f2b24fdc6c48a170 (diff)
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[XFRM] netlink: Move algorithm length calculation to its own function
Adds alg_len() to calculate the properly padded length of an algorithm attribute to simplify the code. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/xfrm/xfrm_user.c25
1 files changed, 12 insertions, 13 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 24a97b1..30e47c6 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -33,6 +33,11 @@
#endif
#include <linux/audit.h>
+static inline int alg_len(struct xfrm_algo *alg)
+{
+ return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
+}
+
static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
{
struct rtattr *rt = xfrma[type - 1];
@@ -232,7 +237,6 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
struct rtattr *rta = u_arg;
struct xfrm_algo *p, *ualg;
struct xfrm_algo_desc *algo;
- int len;
if (!rta)
return 0;
@@ -244,8 +248,7 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
return -ENOSYS;
*props = algo->desc.sadb_alg_id;
- len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
- p = kmemdup(ualg, len, GFP_KERNEL);
+ p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
if (!p)
return -ENOMEM;
@@ -617,11 +620,9 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
copy_to_user_state(x, p);
if (x->aalg)
- NLA_PUT(skb, XFRMA_ALG_AUTH,
- sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
+ NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
if (x->ealg)
- NLA_PUT(skb, XFRMA_ALG_CRYPT,
- sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
+ NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
if (x->calg)
NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
@@ -2072,9 +2073,9 @@ static inline int xfrm_sa_len(struct xfrm_state *x)
{
int l = 0;
if (x->aalg)
- l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
+ l += RTA_SPACE(alg_len(x->aalg));
if (x->ealg)
- l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
+ l += RTA_SPACE(alg_len(x->ealg));
if (x->calg)
l += RTA_SPACE(sizeof(*x->calg));
if (x->encap)
@@ -2127,11 +2128,9 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
copy_to_user_state(x, p);
if (x->aalg)
- NLA_PUT(skb, XFRMA_ALG_AUTH,
- sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
+ NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
if (x->ealg)
- NLA_PUT(skb, XFRMA_ALG_CRYPT,
- sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
+ NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
if (x->calg)
NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);