diff options
Diffstat (limited to 'net/ipv6/esp6.c')
| -rw-r--r-- | net/ipv6/esp6.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 1ac7938dd9ec..db1521fcda5b 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -24,6 +24,8 @@ * This file is derived from net/ipv4/esp.c */ +#define pr_fmt(fmt) "IPv6: " fmt + #include <crypto/aead.h> #include <crypto/authenc.h> #include <linux/err.h> @@ -411,19 +413,15 @@ 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); - u32 rem; - - mtu -= x->props.header_len + crypto_aead_authsize(esp->aead); - rem = mtu & (align - 1); - mtu &= ~(align - 1); + unsigned int net_adj; - if (x->props.mode != XFRM_MODE_TUNNEL) { - u32 padsize = ((blksize - 1) & 7) + 1; - mtu -= blksize - padsize; - mtu += min_t(u32, blksize - padsize, rem); - } + if (x->props.mode != XFRM_MODE_TUNNEL) + net_adj = sizeof(struct ipv6hdr); + else + net_adj = 0; - return mtu - 2; + return ((mtu - x->props.header_len - crypto_aead_authsize(esp->aead) - + net_adj) & ~(align - 1)) + (net_adj - 2); } static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, @@ -442,8 +440,8 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, esph->spi, IPPROTO_ESP, AF_INET6); if (!x) return; - printk(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%pI6\n", - ntohl(esph->spi), &iph->daddr); + pr_debug("pmtu discovery on SA ESP/%08x/%pI6\n", + ntohl(esph->spi), &iph->daddr); xfrm_state_put(x); } @@ -651,11 +649,11 @@ static const struct inet6_protocol esp6_protocol = { static int __init esp6_init(void) { if (xfrm_register_type(&esp6_type, AF_INET6) < 0) { - printk(KERN_INFO "ipv6 esp init: can't add xfrm type\n"); + pr_info("%s: can't add xfrm type\n", __func__); return -EAGAIN; } if (inet6_add_protocol(&esp6_protocol, IPPROTO_ESP) < 0) { - printk(KERN_INFO "ipv6 esp init: can't add protocol\n"); + pr_info("%s: can't add protocol\n", __func__); xfrm_unregister_type(&esp6_type, AF_INET6); return -EAGAIN; } @@ -666,9 +664,9 @@ static int __init esp6_init(void) static void __exit esp6_fini(void) { if (inet6_del_protocol(&esp6_protocol, IPPROTO_ESP) < 0) - printk(KERN_INFO "ipv6 esp close: can't remove protocol\n"); + pr_info("%s: can't remove protocol\n", __func__); if (xfrm_unregister_type(&esp6_type, AF_INET6) < 0) - printk(KERN_INFO "ipv6 esp close: can't remove xfrm type\n"); + pr_info("%s: can't remove xfrm type\n", __func__); } module_init(esp6_init); |