mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
684 lines
17 KiB
684 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* Copyright(c) 2018 Oracle and/or its affiliates. All rights reserved. */ |
|
|
|
#include "ixgbevf.h" |
|
#include <net/xfrm.h> |
|
#include <crypto/aead.h> |
|
|
|
#define IXGBE_IPSEC_KEY_BITS 160 |
|
static const char aes_gcm_name[] = "rfc4106(gcm(aes))"; |
|
|
|
/** |
|
* ixgbevf_ipsec_set_pf_sa - ask the PF to set up an SA |
|
* @adapter: board private structure |
|
* @xs: xfrm info to be sent to the PF |
|
* |
|
* Returns: positive offload handle from the PF, or negative error code |
|
**/ |
|
static int ixgbevf_ipsec_set_pf_sa(struct ixgbevf_adapter *adapter, |
|
struct xfrm_state *xs) |
|
{ |
|
u32 msgbuf[IXGBE_VFMAILBOX_SIZE] = { 0 }; |
|
struct ixgbe_hw *hw = &adapter->hw; |
|
struct sa_mbx_msg *sam; |
|
int ret; |
|
|
|
/* send the important bits to the PF */ |
|
sam = (struct sa_mbx_msg *)(&msgbuf[1]); |
|
sam->flags = xs->xso.flags; |
|
sam->spi = xs->id.spi; |
|
sam->proto = xs->id.proto; |
|
sam->family = xs->props.family; |
|
|
|
if (xs->props.family == AF_INET6) |
|
memcpy(sam->addr, &xs->id.daddr.a6, sizeof(xs->id.daddr.a6)); |
|
else |
|
memcpy(sam->addr, &xs->id.daddr.a4, sizeof(xs->id.daddr.a4)); |
|
memcpy(sam->key, xs->aead->alg_key, sizeof(sam->key)); |
|
|
|
msgbuf[0] = IXGBE_VF_IPSEC_ADD; |
|
|
|
spin_lock_bh(&adapter->mbx_lock); |
|
|
|
ret = hw->mbx.ops.write_posted(hw, msgbuf, IXGBE_VFMAILBOX_SIZE); |
|
if (ret) |
|
goto out; |
|
|
|
ret = hw->mbx.ops.read_posted(hw, msgbuf, 2); |
|
if (ret) |
|
goto out; |
|
|
|
ret = (int)msgbuf[1]; |
|
if (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK && ret >= 0) |
|
ret = -1; |
|
|
|
out: |
|
spin_unlock_bh(&adapter->mbx_lock); |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_del_pf_sa - ask the PF to delete an SA |
|
* @adapter: board private structure |
|
* @pfsa: sa index returned from PF when created, -1 for all |
|
* |
|
* Returns: 0 on success, or negative error code |
|
**/ |
|
static int ixgbevf_ipsec_del_pf_sa(struct ixgbevf_adapter *adapter, int pfsa) |
|
{ |
|
struct ixgbe_hw *hw = &adapter->hw; |
|
u32 msgbuf[2]; |
|
int err; |
|
|
|
memset(msgbuf, 0, sizeof(msgbuf)); |
|
msgbuf[0] = IXGBE_VF_IPSEC_DEL; |
|
msgbuf[1] = (u32)pfsa; |
|
|
|
spin_lock_bh(&adapter->mbx_lock); |
|
|
|
err = hw->mbx.ops.write_posted(hw, msgbuf, 2); |
|
if (err) |
|
goto out; |
|
|
|
err = hw->mbx.ops.read_posted(hw, msgbuf, 2); |
|
if (err) |
|
goto out; |
|
|
|
out: |
|
spin_unlock_bh(&adapter->mbx_lock); |
|
return err; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_restore - restore the IPsec HW settings after a reset |
|
* @adapter: board private structure |
|
* |
|
* Reload the HW tables from the SW tables after they've been bashed |
|
* by a chip reset. While we're here, make sure any stale VF data is |
|
* removed, since we go through reset when num_vfs changes. |
|
**/ |
|
void ixgbevf_ipsec_restore(struct ixgbevf_adapter *adapter) |
|
{ |
|
struct ixgbevf_ipsec *ipsec = adapter->ipsec; |
|
struct net_device *netdev = adapter->netdev; |
|
int i; |
|
|
|
if (!(adapter->netdev->features & NETIF_F_HW_ESP)) |
|
return; |
|
|
|
/* reload the Rx and Tx keys */ |
|
for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) { |
|
struct rx_sa *r = &ipsec->rx_tbl[i]; |
|
struct tx_sa *t = &ipsec->tx_tbl[i]; |
|
int ret; |
|
|
|
if (r->used) { |
|
ret = ixgbevf_ipsec_set_pf_sa(adapter, r->xs); |
|
if (ret < 0) |
|
netdev_err(netdev, "reload rx_tbl[%d] failed = %d\n", |
|
i, ret); |
|
} |
|
|
|
if (t->used) { |
|
ret = ixgbevf_ipsec_set_pf_sa(adapter, t->xs); |
|
if (ret < 0) |
|
netdev_err(netdev, "reload tx_tbl[%d] failed = %d\n", |
|
i, ret); |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_find_empty_idx - find the first unused security parameter index |
|
* @ipsec: pointer to IPsec struct |
|
* @rxtable: true if we need to look in the Rx table |
|
* |
|
* Returns the first unused index in either the Rx or Tx SA table |
|
**/ |
|
static |
|
int ixgbevf_ipsec_find_empty_idx(struct ixgbevf_ipsec *ipsec, bool rxtable) |
|
{ |
|
u32 i; |
|
|
|
if (rxtable) { |
|
if (ipsec->num_rx_sa == IXGBE_IPSEC_MAX_SA_COUNT) |
|
return -ENOSPC; |
|
|
|
/* search rx sa table */ |
|
for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) { |
|
if (!ipsec->rx_tbl[i].used) |
|
return i; |
|
} |
|
} else { |
|
if (ipsec->num_tx_sa == IXGBE_IPSEC_MAX_SA_COUNT) |
|
return -ENOSPC; |
|
|
|
/* search tx sa table */ |
|
for (i = 0; i < IXGBE_IPSEC_MAX_SA_COUNT; i++) { |
|
if (!ipsec->tx_tbl[i].used) |
|
return i; |
|
} |
|
} |
|
|
|
return -ENOSPC; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_find_rx_state - find the state that matches |
|
* @ipsec: pointer to IPsec struct |
|
* @daddr: inbound address to match |
|
* @proto: protocol to match |
|
* @spi: SPI to match |
|
* @ip4: true if using an IPv4 address |
|
* |
|
* Returns a pointer to the matching SA state information |
|
**/ |
|
static |
|
struct xfrm_state *ixgbevf_ipsec_find_rx_state(struct ixgbevf_ipsec *ipsec, |
|
__be32 *daddr, u8 proto, |
|
__be32 spi, bool ip4) |
|
{ |
|
struct xfrm_state *ret = NULL; |
|
struct rx_sa *rsa; |
|
|
|
rcu_read_lock(); |
|
hash_for_each_possible_rcu(ipsec->rx_sa_list, rsa, hlist, |
|
(__force u32)spi) { |
|
if (spi == rsa->xs->id.spi && |
|
((ip4 && *daddr == rsa->xs->id.daddr.a4) || |
|
(!ip4 && !memcmp(daddr, &rsa->xs->id.daddr.a6, |
|
sizeof(rsa->xs->id.daddr.a6)))) && |
|
proto == rsa->xs->id.proto) { |
|
ret = rsa->xs; |
|
xfrm_state_hold(ret); |
|
break; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
return ret; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_parse_proto_keys - find the key and salt based on the protocol |
|
* @xs: pointer to xfrm_state struct |
|
* @mykey: pointer to key array to populate |
|
* @mysalt: pointer to salt value to populate |
|
* |
|
* This copies the protocol keys and salt to our own data tables. The |
|
* 82599 family only supports the one algorithm. |
|
**/ |
|
static int ixgbevf_ipsec_parse_proto_keys(struct xfrm_state *xs, |
|
u32 *mykey, u32 *mysalt) |
|
{ |
|
struct net_device *dev = xs->xso.real_dev; |
|
unsigned char *key_data; |
|
char *alg_name = NULL; |
|
int key_len; |
|
|
|
if (!xs->aead) { |
|
netdev_err(dev, "Unsupported IPsec algorithm\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (xs->aead->alg_icv_len != IXGBE_IPSEC_AUTH_BITS) { |
|
netdev_err(dev, "IPsec offload requires %d bit authentication\n", |
|
IXGBE_IPSEC_AUTH_BITS); |
|
return -EINVAL; |
|
} |
|
|
|
key_data = &xs->aead->alg_key[0]; |
|
key_len = xs->aead->alg_key_len; |
|
alg_name = xs->aead->alg_name; |
|
|
|
if (strcmp(alg_name, aes_gcm_name)) { |
|
netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n", |
|
aes_gcm_name); |
|
return -EINVAL; |
|
} |
|
|
|
/* The key bytes come down in a big endian array of bytes, so |
|
* we don't need to do any byte swapping. |
|
* 160 accounts for 16 byte key and 4 byte salt |
|
*/ |
|
if (key_len > IXGBE_IPSEC_KEY_BITS) { |
|
*mysalt = ((u32 *)key_data)[4]; |
|
} else if (key_len == IXGBE_IPSEC_KEY_BITS) { |
|
*mysalt = 0; |
|
} else { |
|
netdev_err(dev, "IPsec hw offload only supports keys up to 128 bits with a 32 bit salt\n"); |
|
return -EINVAL; |
|
} |
|
memcpy(mykey, key_data, 16); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_add_sa - program device with a security association |
|
* @xs: pointer to transformer state struct |
|
**/ |
|
static int ixgbevf_ipsec_add_sa(struct xfrm_state *xs) |
|
{ |
|
struct net_device *dev = xs->xso.real_dev; |
|
struct ixgbevf_adapter *adapter; |
|
struct ixgbevf_ipsec *ipsec; |
|
u16 sa_idx; |
|
int ret; |
|
|
|
adapter = netdev_priv(dev); |
|
ipsec = adapter->ipsec; |
|
|
|
if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { |
|
netdev_err(dev, "Unsupported protocol 0x%04x for IPsec offload\n", |
|
xs->id.proto); |
|
return -EINVAL; |
|
} |
|
|
|
if (xs->props.mode != XFRM_MODE_TRANSPORT) { |
|
netdev_err(dev, "Unsupported mode for ipsec offload\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) { |
|
struct rx_sa rsa; |
|
|
|
if (xs->calg) { |
|
netdev_err(dev, "Compression offload not supported\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* find the first unused index */ |
|
ret = ixgbevf_ipsec_find_empty_idx(ipsec, true); |
|
if (ret < 0) { |
|
netdev_err(dev, "No space for SA in Rx table!\n"); |
|
return ret; |
|
} |
|
sa_idx = (u16)ret; |
|
|
|
memset(&rsa, 0, sizeof(rsa)); |
|
rsa.used = true; |
|
rsa.xs = xs; |
|
|
|
if (rsa.xs->id.proto & IPPROTO_ESP) |
|
rsa.decrypt = xs->ealg || xs->aead; |
|
|
|
/* get the key and salt */ |
|
ret = ixgbevf_ipsec_parse_proto_keys(xs, rsa.key, &rsa.salt); |
|
if (ret) { |
|
netdev_err(dev, "Failed to get key data for Rx SA table\n"); |
|
return ret; |
|
} |
|
|
|
/* get ip for rx sa table */ |
|
if (xs->props.family == AF_INET6) |
|
memcpy(rsa.ipaddr, &xs->id.daddr.a6, 16); |
|
else |
|
memcpy(&rsa.ipaddr[3], &xs->id.daddr.a4, 4); |
|
|
|
rsa.mode = IXGBE_RXMOD_VALID; |
|
if (rsa.xs->id.proto & IPPROTO_ESP) |
|
rsa.mode |= IXGBE_RXMOD_PROTO_ESP; |
|
if (rsa.decrypt) |
|
rsa.mode |= IXGBE_RXMOD_DECRYPT; |
|
if (rsa.xs->props.family == AF_INET6) |
|
rsa.mode |= IXGBE_RXMOD_IPV6; |
|
|
|
ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); |
|
if (ret < 0) |
|
return ret; |
|
rsa.pfsa = ret; |
|
|
|
/* the preparations worked, so save the info */ |
|
memcpy(&ipsec->rx_tbl[sa_idx], &rsa, sizeof(rsa)); |
|
|
|
xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_RX_INDEX; |
|
|
|
ipsec->num_rx_sa++; |
|
|
|
/* hash the new entry for faster search in Rx path */ |
|
hash_add_rcu(ipsec->rx_sa_list, &ipsec->rx_tbl[sa_idx].hlist, |
|
(__force u32)rsa.xs->id.spi); |
|
} else { |
|
struct tx_sa tsa; |
|
|
|
/* find the first unused index */ |
|
ret = ixgbevf_ipsec_find_empty_idx(ipsec, false); |
|
if (ret < 0) { |
|
netdev_err(dev, "No space for SA in Tx table\n"); |
|
return ret; |
|
} |
|
sa_idx = (u16)ret; |
|
|
|
memset(&tsa, 0, sizeof(tsa)); |
|
tsa.used = true; |
|
tsa.xs = xs; |
|
|
|
if (xs->id.proto & IPPROTO_ESP) |
|
tsa.encrypt = xs->ealg || xs->aead; |
|
|
|
ret = ixgbevf_ipsec_parse_proto_keys(xs, tsa.key, &tsa.salt); |
|
if (ret) { |
|
netdev_err(dev, "Failed to get key data for Tx SA table\n"); |
|
memset(&tsa, 0, sizeof(tsa)); |
|
return ret; |
|
} |
|
|
|
ret = ixgbevf_ipsec_set_pf_sa(adapter, xs); |
|
if (ret < 0) |
|
return ret; |
|
tsa.pfsa = ret; |
|
|
|
/* the preparations worked, so save the info */ |
|
memcpy(&ipsec->tx_tbl[sa_idx], &tsa, sizeof(tsa)); |
|
|
|
xs->xso.offload_handle = sa_idx + IXGBE_IPSEC_BASE_TX_INDEX; |
|
|
|
ipsec->num_tx_sa++; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_del_sa - clear out this specific SA |
|
* @xs: pointer to transformer state struct |
|
**/ |
|
static void ixgbevf_ipsec_del_sa(struct xfrm_state *xs) |
|
{ |
|
struct net_device *dev = xs->xso.real_dev; |
|
struct ixgbevf_adapter *adapter; |
|
struct ixgbevf_ipsec *ipsec; |
|
u16 sa_idx; |
|
|
|
adapter = netdev_priv(dev); |
|
ipsec = adapter->ipsec; |
|
|
|
if (xs->xso.flags & XFRM_OFFLOAD_INBOUND) { |
|
sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX; |
|
|
|
if (!ipsec->rx_tbl[sa_idx].used) { |
|
netdev_err(dev, "Invalid Rx SA selected sa_idx=%d offload_handle=%lu\n", |
|
sa_idx, xs->xso.offload_handle); |
|
return; |
|
} |
|
|
|
ixgbevf_ipsec_del_pf_sa(adapter, ipsec->rx_tbl[sa_idx].pfsa); |
|
hash_del_rcu(&ipsec->rx_tbl[sa_idx].hlist); |
|
memset(&ipsec->rx_tbl[sa_idx], 0, sizeof(struct rx_sa)); |
|
ipsec->num_rx_sa--; |
|
} else { |
|
sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; |
|
|
|
if (!ipsec->tx_tbl[sa_idx].used) { |
|
netdev_err(dev, "Invalid Tx SA selected sa_idx=%d offload_handle=%lu\n", |
|
sa_idx, xs->xso.offload_handle); |
|
return; |
|
} |
|
|
|
ixgbevf_ipsec_del_pf_sa(adapter, ipsec->tx_tbl[sa_idx].pfsa); |
|
memset(&ipsec->tx_tbl[sa_idx], 0, sizeof(struct tx_sa)); |
|
ipsec->num_tx_sa--; |
|
} |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_offload_ok - can this packet use the xfrm hw offload |
|
* @skb: current data packet |
|
* @xs: pointer to transformer state struct |
|
**/ |
|
static bool ixgbevf_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) |
|
{ |
|
if (xs->props.family == AF_INET) { |
|
/* Offload with IPv4 options is not supported yet */ |
|
if (ip_hdr(skb)->ihl != 5) |
|
return false; |
|
} else { |
|
/* Offload with IPv6 extension headers is not support yet */ |
|
if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static const struct xfrmdev_ops ixgbevf_xfrmdev_ops = { |
|
.xdo_dev_state_add = ixgbevf_ipsec_add_sa, |
|
.xdo_dev_state_delete = ixgbevf_ipsec_del_sa, |
|
.xdo_dev_offload_ok = ixgbevf_ipsec_offload_ok, |
|
}; |
|
|
|
/** |
|
* ixgbevf_ipsec_tx - setup Tx flags for IPsec offload |
|
* @tx_ring: outgoing context |
|
* @first: current data packet |
|
* @itd: ipsec Tx data for later use in building context descriptor |
|
**/ |
|
int ixgbevf_ipsec_tx(struct ixgbevf_ring *tx_ring, |
|
struct ixgbevf_tx_buffer *first, |
|
struct ixgbevf_ipsec_tx_data *itd) |
|
{ |
|
struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev); |
|
struct ixgbevf_ipsec *ipsec = adapter->ipsec; |
|
struct xfrm_state *xs; |
|
struct sec_path *sp; |
|
struct tx_sa *tsa; |
|
u16 sa_idx; |
|
|
|
sp = skb_sec_path(first->skb); |
|
if (unlikely(!sp->len)) { |
|
netdev_err(tx_ring->netdev, "%s: no xfrm state len = %d\n", |
|
__func__, sp->len); |
|
return 0; |
|
} |
|
|
|
xs = xfrm_input_state(first->skb); |
|
if (unlikely(!xs)) { |
|
netdev_err(tx_ring->netdev, "%s: no xfrm_input_state() xs = %p\n", |
|
__func__, xs); |
|
return 0; |
|
} |
|
|
|
sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_TX_INDEX; |
|
if (unlikely(sa_idx >= IXGBE_IPSEC_MAX_SA_COUNT)) { |
|
netdev_err(tx_ring->netdev, "%s: bad sa_idx=%d handle=%lu\n", |
|
__func__, sa_idx, xs->xso.offload_handle); |
|
return 0; |
|
} |
|
|
|
tsa = &ipsec->tx_tbl[sa_idx]; |
|
if (unlikely(!tsa->used)) { |
|
netdev_err(tx_ring->netdev, "%s: unused sa_idx=%d\n", |
|
__func__, sa_idx); |
|
return 0; |
|
} |
|
|
|
itd->pfsa = tsa->pfsa - IXGBE_IPSEC_BASE_TX_INDEX; |
|
|
|
first->tx_flags |= IXGBE_TX_FLAGS_IPSEC | IXGBE_TX_FLAGS_CSUM; |
|
|
|
if (xs->id.proto == IPPROTO_ESP) { |
|
itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_TYPE_ESP | |
|
IXGBE_ADVTXD_TUCMD_L4T_TCP; |
|
if (first->protocol == htons(ETH_P_IP)) |
|
itd->flags |= IXGBE_ADVTXD_TUCMD_IPV4; |
|
|
|
/* The actual trailer length is authlen (16 bytes) plus |
|
* 2 bytes for the proto and the padlen values, plus |
|
* padlen bytes of padding. This ends up not the same |
|
* as the static value found in xs->props.trailer_len (21). |
|
* |
|
* ... but if we're doing GSO, don't bother as the stack |
|
* doesn't add a trailer for those. |
|
*/ |
|
if (!skb_is_gso(first->skb)) { |
|
/* The "correct" way to get the auth length would be |
|
* to use |
|
* authlen = crypto_aead_authsize(xs->data); |
|
* but since we know we only have one size to worry |
|
* about * we can let the compiler use the constant |
|
* and save us a few CPU cycles. |
|
*/ |
|
const int authlen = IXGBE_IPSEC_AUTH_BITS / 8; |
|
struct sk_buff *skb = first->skb; |
|
u8 padlen; |
|
int ret; |
|
|
|
ret = skb_copy_bits(skb, skb->len - (authlen + 2), |
|
&padlen, 1); |
|
if (unlikely(ret)) |
|
return 0; |
|
itd->trailer_len = authlen + 2 + padlen; |
|
} |
|
} |
|
if (tsa->encrypt) |
|
itd->flags |= IXGBE_ADVTXD_TUCMD_IPSEC_ENCRYPT_EN; |
|
|
|
return 1; |
|
} |
|
|
|
/** |
|
* ixgbevf_ipsec_rx - decode IPsec bits from Rx descriptor |
|
* @rx_ring: receiving ring |
|
* @rx_desc: receive data descriptor |
|
* @skb: current data packet |
|
* |
|
* Determine if there was an IPsec encapsulation noticed, and if so set up |
|
* the resulting status for later in the receive stack. |
|
**/ |
|
void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring, |
|
union ixgbe_adv_rx_desc *rx_desc, |
|
struct sk_buff *skb) |
|
{ |
|
struct ixgbevf_adapter *adapter = netdev_priv(rx_ring->netdev); |
|
__le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; |
|
__le16 ipsec_pkt_types = cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH | |
|
IXGBE_RXDADV_PKTTYPE_IPSEC_ESP); |
|
struct ixgbevf_ipsec *ipsec = adapter->ipsec; |
|
struct xfrm_offload *xo = NULL; |
|
struct xfrm_state *xs = NULL; |
|
struct ipv6hdr *ip6 = NULL; |
|
struct iphdr *ip4 = NULL; |
|
struct sec_path *sp; |
|
void *daddr; |
|
__be32 spi; |
|
u8 *c_hdr; |
|
u8 proto; |
|
|
|
/* Find the IP and crypto headers in the data. |
|
* We can assume no VLAN header in the way, b/c the |
|
* hw won't recognize the IPsec packet and anyway the |
|
* currently VLAN device doesn't support xfrm offload. |
|
*/ |
|
if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV4)) { |
|
ip4 = (struct iphdr *)(skb->data + ETH_HLEN); |
|
daddr = &ip4->daddr; |
|
c_hdr = (u8 *)ip4 + ip4->ihl * 4; |
|
} else if (pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPV6)) { |
|
ip6 = (struct ipv6hdr *)(skb->data + ETH_HLEN); |
|
daddr = &ip6->daddr; |
|
c_hdr = (u8 *)ip6 + sizeof(struct ipv6hdr); |
|
} else { |
|
return; |
|
} |
|
|
|
switch (pkt_info & ipsec_pkt_types) { |
|
case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_AH): |
|
spi = ((struct ip_auth_hdr *)c_hdr)->spi; |
|
proto = IPPROTO_AH; |
|
break; |
|
case cpu_to_le16(IXGBE_RXDADV_PKTTYPE_IPSEC_ESP): |
|
spi = ((struct ip_esp_hdr *)c_hdr)->spi; |
|
proto = IPPROTO_ESP; |
|
break; |
|
default: |
|
return; |
|
} |
|
|
|
xs = ixgbevf_ipsec_find_rx_state(ipsec, daddr, proto, spi, !!ip4); |
|
if (unlikely(!xs)) |
|
return; |
|
|
|
sp = secpath_set(skb); |
|
if (unlikely(!sp)) |
|
return; |
|
|
|
sp->xvec[sp->len++] = xs; |
|
sp->olen++; |
|
xo = xfrm_offload(skb); |
|
xo->flags = CRYPTO_DONE; |
|
xo->status = CRYPTO_SUCCESS; |
|
|
|
adapter->rx_ipsec++; |
|
} |
|
|
|
/** |
|
* ixgbevf_init_ipsec_offload - initialize registers for IPsec operation |
|
* @adapter: board private structure |
|
**/ |
|
void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter) |
|
{ |
|
struct ixgbevf_ipsec *ipsec; |
|
size_t size; |
|
|
|
switch (adapter->hw.api_version) { |
|
case ixgbe_mbox_api_14: |
|
break; |
|
default: |
|
return; |
|
} |
|
|
|
ipsec = kzalloc(sizeof(*ipsec), GFP_KERNEL); |
|
if (!ipsec) |
|
goto err1; |
|
hash_init(ipsec->rx_sa_list); |
|
|
|
size = sizeof(struct rx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; |
|
ipsec->rx_tbl = kzalloc(size, GFP_KERNEL); |
|
if (!ipsec->rx_tbl) |
|
goto err2; |
|
|
|
size = sizeof(struct tx_sa) * IXGBE_IPSEC_MAX_SA_COUNT; |
|
ipsec->tx_tbl = kzalloc(size, GFP_KERNEL); |
|
if (!ipsec->tx_tbl) |
|
goto err2; |
|
|
|
ipsec->num_rx_sa = 0; |
|
ipsec->num_tx_sa = 0; |
|
|
|
adapter->ipsec = ipsec; |
|
|
|
adapter->netdev->xfrmdev_ops = &ixgbevf_xfrmdev_ops; |
|
|
|
#define IXGBEVF_ESP_FEATURES (NETIF_F_HW_ESP | \ |
|
NETIF_F_HW_ESP_TX_CSUM | \ |
|
NETIF_F_GSO_ESP) |
|
|
|
adapter->netdev->features |= IXGBEVF_ESP_FEATURES; |
|
adapter->netdev->hw_enc_features |= IXGBEVF_ESP_FEATURES; |
|
|
|
return; |
|
|
|
err2: |
|
kfree(ipsec->rx_tbl); |
|
kfree(ipsec->tx_tbl); |
|
kfree(ipsec); |
|
err1: |
|
netdev_err(adapter->netdev, "Unable to allocate memory for SA tables"); |
|
} |
|
|
|
/** |
|
* ixgbevf_stop_ipsec_offload - tear down the IPsec offload |
|
* @adapter: board private structure |
|
**/ |
|
void ixgbevf_stop_ipsec_offload(struct ixgbevf_adapter *adapter) |
|
{ |
|
struct ixgbevf_ipsec *ipsec = adapter->ipsec; |
|
|
|
adapter->ipsec = NULL; |
|
if (ipsec) { |
|
kfree(ipsec->rx_tbl); |
|
kfree(ipsec->tx_tbl); |
|
kfree(ipsec); |
|
} |
|
}
|
|
|