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Diffstat (limited to 'net/ipv4/esp4.c')
-rw-r--r--net/ipv4/esp4.c49
1 files changed, 15 insertions, 34 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 109ee89f123e..7785b28061ac 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -121,7 +121,6 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
struct aead_givcrypt_request *req;
struct scatterlist *sg;
struct scatterlist *asg;
- struct esp_data *esp;
struct sk_buff *trailer;
void *tmp;
u8 *iv;
@@ -139,8 +138,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
/* skb is pure payload to encrypt */
- esp = x->data;
- aead = esp->aead;
+ aead = x->data;
alen = crypto_aead_authsize(aead);
tfclen = 0;
@@ -154,8 +152,6 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
}
blksize = ALIGN(crypto_aead_blocksize(aead), 4);
clen = ALIGN(skb->len + 2 + tfclen, blksize);
- if (esp->padlen)
- clen = ALIGN(clen, esp->padlen);
plen = clen - skb->len - tfclen;
err = skb_cow_data(skb, tfclen + plen + alen, &trailer);
@@ -280,8 +276,7 @@ static int esp_input_done2(struct sk_buff *skb, int err)
{
const struct iphdr *iph;
struct xfrm_state *x = xfrm_input_state(skb);
- struct esp_data *esp = x->data;
- struct crypto_aead *aead = esp->aead;
+ struct crypto_aead *aead = x->data;
int alen = crypto_aead_authsize(aead);
int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead);
int elen = skb->len - hlen;
@@ -376,8 +371,7 @@ static void esp_input_done(struct crypto_async_request *base, int err)
static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
{
struct ip_esp_hdr *esph;
- struct esp_data *esp = x->data;
- struct crypto_aead *aead = esp->aead;
+ struct crypto_aead *aead = x->data;
struct aead_request *req;
struct sk_buff *trailer;
int elen = skb->len - sizeof(*esph) - crypto_aead_ivsize(aead);
@@ -459,9 +453,8 @@ out:
static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
{
- struct esp_data *esp = x->data;
- u32 blksize = ALIGN(crypto_aead_blocksize(esp->aead), 4);
- u32 align = max_t(u32, blksize, esp->padlen);
+ struct crypto_aead *aead = x->data;
+ u32 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
unsigned int net_adj;
switch (x->props.mode) {
@@ -476,8 +469,8 @@ static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
BUG();
}
- return ((mtu - x->props.header_len - crypto_aead_authsize(esp->aead) -
- net_adj) & ~(align - 1)) + net_adj - 2;
+ return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
+ net_adj) & ~(blksize - 1)) + net_adj - 2;
}
static void esp4_err(struct sk_buff *skb, u32 info)
@@ -511,18 +504,16 @@ static void esp4_err(struct sk_buff *skb, u32 info)
static void esp_destroy(struct xfrm_state *x)
{
- struct esp_data *esp = x->data;
+ struct crypto_aead *aead = x->data;
- if (!esp)
+ if (!aead)
return;
- crypto_free_aead(esp->aead);
- kfree(esp);
+ crypto_free_aead(aead);
}
static int esp_init_aead(struct xfrm_state *x)
{
- struct esp_data *esp = x->data;
struct crypto_aead *aead;
int err;
@@ -531,7 +522,7 @@ static int esp_init_aead(struct xfrm_state *x)
if (IS_ERR(aead))
goto error;
- esp->aead = aead;
+ x->data = aead;
err = crypto_aead_setkey(aead, x->aead->alg_key,
(x->aead->alg_key_len + 7) / 8);
@@ -548,7 +539,6 @@ error:
static int esp_init_authenc(struct xfrm_state *x)
{
- struct esp_data *esp = x->data;
struct crypto_aead *aead;
struct crypto_authenc_key_param *param;
struct rtattr *rta;
@@ -583,7 +573,7 @@ static int esp_init_authenc(struct xfrm_state *x)
if (IS_ERR(aead))
goto error;
- esp->aead = aead;
+ x->data = aead;
keylen = (x->aalg ? (x->aalg->alg_key_len + 7) / 8 : 0) +
(x->ealg->alg_key_len + 7) / 8 + RTA_SPACE(sizeof(*param));
@@ -638,16 +628,11 @@ error:
static int esp_init_state(struct xfrm_state *x)
{
- struct esp_data *esp;
struct crypto_aead *aead;
u32 align;
int err;
- esp = kzalloc(sizeof(*esp), GFP_KERNEL);
- if (esp == NULL)
- return -ENOMEM;
-
- x->data = esp;
+ x->data = NULL;
if (x->aead)
err = esp_init_aead(x);
@@ -657,9 +642,7 @@ static int esp_init_state(struct xfrm_state *x)
if (err)
goto error;
- aead = esp->aead;
-
- esp->padlen = 0;
+ aead = x->data;
x->props.header_len = sizeof(struct ip_esp_hdr) +
crypto_aead_ivsize(aead);
@@ -683,9 +666,7 @@ static int esp_init_state(struct xfrm_state *x)
}
align = ALIGN(crypto_aead_blocksize(aead), 4);
- if (esp->padlen)
- align = max_t(u32, align, esp->padlen);
- x->props.trailer_len = align + 1 + crypto_aead_authsize(esp->aead);
+ x->props.trailer_len = align + 1 + crypto_aead_authsize(aead);
error:
return err;