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net: esp{4,6}: remove padlen from struct esp_data 

The padlen member of struct esp_data is always zero. Get rid of it.

Signed-off-by: Mathias Krause <mathias.krause@secunet.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Mathias Krause 2013-10-18 12:09:04 +02:00 committed by Steffen Klassert
parent 4d53eff48b
commit 123b0d1ba0
3 changed files with 2 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/esp.h
View File

@ -6,9 +6,6 @@
struct crypto_aead;
struct esp_data {
/* 0..255 */
int padlen;
/* Confidentiality & Integrity */
struct crypto_aead *aead;
};

9
net/ipv4/esp4.c
View File

@ -154,8 +154,6 @@ 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);
@ -461,7 +459,6 @@ 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);
unsigned int net_adj;
switch (x->props.mode) {
@ -477,7 +474,7 @@ static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
}
return ((mtu - x->props.header_len - crypto_aead_authsize(esp->aead) -
net_adj) & ~(align - 1)) + net_adj - 2;
net_adj) & ~(blksize - 1)) + net_adj - 2;
}
static void esp4_err(struct sk_buff *skb, u32 info)
@ -659,8 +656,6 @@ static int esp_init_state(struct xfrm_state *x)
aead = esp->aead;
esp->padlen = 0;
x->props.header_len = sizeof(struct ip_esp_hdr) +
crypto_aead_ivsize(aead);
if (x->props.mode == XFRM_MODE_TUNNEL)
@ -683,8 +678,6 @@ 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);
error:

9
net/ipv6/esp6.c
View File

@ -181,8 +181,6 @@ static int esp6_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);
@ -416,7 +414,6 @@ static u32 esp6_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);
unsigned int net_adj;
if (x->props.mode != XFRM_MODE_TUNNEL)
@ -425,7 +422,7 @@ static u32 esp6_get_mtu(struct xfrm_state *x, int mtu)
net_adj = 0;
return ((mtu - x->props.header_len - crypto_aead_authsize(esp->aead) -
net_adj) & ~(align - 1)) + net_adj - 2;
net_adj) & ~(blksize - 1)) + net_adj - 2;
}
static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
@ -606,8 +603,6 @@ static int esp6_init_state(struct xfrm_state *x)
aead = esp->aead;
esp->padlen = 0;
x->props.header_len = sizeof(struct ip_esp_hdr) +
crypto_aead_ivsize(aead);
switch (x->props.mode) {
@ -626,8 +621,6 @@ static int esp6_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);
error: