Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-10 14:11:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

xfrm: Add an IPsec hardware offloading API

Browse Source 
This patch adds all the bits that are needed to do
IPsec hardware offload for IPsec states and ESP packets.
We add xfrmdev_ops to the net_device. xfrmdev_ops has
function pointers that are needed to manage the xfrm
states in the hardware and to do a per packet
offloading decision.

Joint work with:
Ilan Tayari <ilant@mellanox.com>
Guy Shapiro <guysh@mellanox.com>
Yossi Kuperman <yossiku@mellanox.com>

Signed-off-by: Guy Shapiro <guysh@mellanox.com>
Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Yossi Kuperman <yossiku@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Steffen Klassert 2017-04-14 10:06:10 +02:00
parent c35fe4106b
commit d77e38e612
14 changed files with 424 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/linux/netdevice.h
View File

@ -824,6 +824,16 @@ struct netdev_xdp {
};
};
#ifdef CONFIG_XFRM_OFFLOAD
struct xfrmdev_ops {
int (*xdo_dev_state_add) (struct xfrm_state *x);
void (*xdo_dev_state_delete) (struct xfrm_state *x);
void (*xdo_dev_state_free) (struct xfrm_state *x);
bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
struct xfrm_state *x);
};
#endif
/*
* This structure defines the management hooks for network devices.
* The following hooks can be defined; unless noted otherwise, they are
@ -1697,6 +1707,10 @@ struct net_device {
const struct ndisc_ops *ndisc_ops;
#endif
#ifdef CONFIG_XFRM
const struct xfrmdev_ops *xfrmdev_ops;
#endif
const struct header_ops *header_ops;
unsigned int flags;

65
include/net/xfrm.h
View File

@ -120,6 +120,13 @@ struct xfrm_state_walk {
struct xfrm_address_filter *filter;
};
struct xfrm_state_offload {
struct net_device *dev;
unsigned long offload_handle;
unsigned int num_exthdrs;
u8 flags;
};
/* Full description of state of transformer. */
struct xfrm_state {
possible_net_t xs_net;
@ -207,6 +214,8 @@ struct xfrm_state {
struct xfrm_lifetime_cur curlft;
struct tasklet_hrtimer mtimer;
struct xfrm_state_offload xso;
/* used to fix curlft->add_time when changing date */
long saved_tmo;
@ -1453,7 +1462,6 @@ struct xfrm6_tunnel {
void xfrm_init(void);
void xfrm4_init(void);
int xfrm_state_init(struct net *net);
void xfrm_dev_init(void);
void xfrm_state_fini(struct net *net);
void xfrm4_state_init(void);
void xfrm4_protocol_init(void);
@ -1559,6 +1567,7 @@ struct xfrmk_spdinfo {
struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
int xfrm_state_delete(struct xfrm_state *x);
int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
@ -1641,6 +1650,11 @@ static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
}
#endif
struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
const xfrm_address_t *saddr,
const xfrm_address_t *daddr,
int family);
struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
@ -1846,6 +1860,55 @@ static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
}
#endif
#ifdef CONFIG_XFRM_OFFLOAD
void __net_init xfrm_dev_init(void);
int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
struct xfrm_user_offload *xuo);
bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
static inline void xfrm_dev_state_delete(struct xfrm_state *x)
{
struct xfrm_state_offload *xso = &x->xso;
if (xso->dev)
xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
}
static inline void xfrm_dev_state_free(struct xfrm_state *x)
{
struct xfrm_state_offload *xso = &x->xso;
struct net_device *dev = xso->dev;
if (dev && dev->xfrmdev_ops) {
dev->xfrmdev_ops->xdo_dev_state_free(x);
xso->dev = NULL;
dev_put(dev);
}
}
#else
static inline void __net_init xfrm_dev_init(void)
{
}
static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
{
return 0;
}
static inline void xfrm_dev_state_delete(struct xfrm_state *x)
{
}
static inline void xfrm_dev_state_free(struct xfrm_state *x)
{
}
static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
{
return false;
}
#endif
static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
{
if (attrs[XFRMA_MARK])

8
include/uapi/linux/xfrm.h
View File

@ -303,6 +303,7 @@ enum xfrm_attr_type_t {
XFRMA_PROTO, /* __u8 */
XFRMA_ADDRESS_FILTER, /* struct xfrm_address_filter */
XFRMA_PAD,
XFRMA_OFFLOAD_DEV, /* struct xfrm_state_offload */
__XFRMA_MAX
#define XFRMA_MAX (__XFRMA_MAX - 1)
@ -494,6 +495,13 @@ struct xfrm_address_filter {
__u8 dplen;
};
struct xfrm_user_offload {
int ifindex;
__u8 flags;
};
#define XFRM_OFFLOAD_IPV6 1
#define XFRM_OFFLOAD_INBOUND 2
#ifndef __KERNEL__
/* backwards compatibility for userspace */
#define XFRMGRP_ACQUIRE 1

7
net/ipv4/esp4.c
View File

@ -435,9 +435,6 @@ skip_cow2:
aead_request_set_crypt(req, sg, dsg, ivlen + clen, iv);
aead_request_set_ad(req, assoclen);
seqno = cpu_to_be64(XFRM_SKB_CB(skb)->seq.output.low +
((u64)XFRM_SKB_CB(skb)->seq.output.hi << 32));
memset(iv, 0, ivlen);
memcpy(iv + ivlen - min(ivlen, 8), (u8 *)&seqno + 8 - min(ivlen, 8),
min(ivlen, 8));
@ -470,6 +467,7 @@ static int esp_input_done2(struct sk_buff *skb, int err)
{
const struct iphdr *iph;
struct xfrm_state *x = xfrm_input_state(skb);
struct xfrm_offload *xo = xfrm_offload(skb);
struct crypto_aead *aead = x->data;
int alen = crypto_aead_authsize(aead);
int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead);
@ -478,7 +476,8 @@ static int esp_input_done2(struct sk_buff *skb, int err)
u8 nexthdr[2];
int padlen;
kfree(ESP_SKB_CB(skb)->tmp);
if (!xo || (xo && !(xo->flags & CRYPTO_DONE)))
kfree(ESP_SKB_CB(skb)->tmp);
if (unlikely(err))
goto out;

3
net/ipv4/xfrm4_output.c
View File

@ -29,7 +29,8 @@ static int xfrm4_tunnel_check_size(struct sk_buff *skb)
goto out;
mtu = dst_mtu(skb_dst(skb));
if (skb->len > mtu) {
if ((!skb_is_gso(skb) && skb->len > mtu) ||
(skb_is_gso(skb) && skb_gso_network_seglen(skb) > ip_skb_dst_mtu(skb->sk, skb))) {
skb->protocol = htons(ETH_P_IP);
if (skb->sk)

4
net/ipv6/esp6.c
View File

@ -450,6 +450,7 @@ error:
static int esp_input_done2(struct sk_buff *skb, int err)
{
struct xfrm_state *x = xfrm_input_state(skb);
struct xfrm_offload *xo = xfrm_offload(skb);
struct crypto_aead *aead = x->data;
int alen = crypto_aead_authsize(aead);
int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead);
@ -458,7 +459,8 @@ static int esp_input_done2(struct sk_buff *skb, int err)
int padlen;
u8 nexthdr[2];
kfree(ESP_SKB_CB(skb)->tmp);
if (!xo || (xo && !(xo->flags & CRYPTO_DONE)))
kfree(ESP_SKB_CB(skb)->tmp);
if (unlikely(err))
goto out;

9
net/ipv6/xfrm6_output.c
View File

@ -73,11 +73,16 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
int mtu, ret = 0;
struct dst_entry *dst = skb_dst(skb);
if (skb->ignore_df)
goto out;
mtu = dst_mtu(dst);
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
if (!skb->ignore_df && skb->len > mtu) {
if ((!skb_is_gso(skb) && skb->len > mtu) ||
(skb_is_gso(skb) &&
skb_gso_network_seglen(skb) > ip6_skb_dst_mtu(skb))) {
skb->dev = dst->dev;
skb->protocol = htons(ETH_P_IPV6);
@ -89,7 +94,7 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
ret = -EMSGSIZE;
}
out:
return ret;
}

3
net/xfrm/Makefile
View File

@ -4,7 +4,8 @@
obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_hash.o \
xfrm_input.o xfrm_output.o \
xfrm_sysctl.o xfrm_replay.o xfrm_device.o
xfrm_sysctl.o xfrm_replay.o
obj-$(CONFIG_XFRM_OFFLOAD) += xfrm_device.o
obj-$(CONFIG_XFRM_STATISTICS) += xfrm_proc.o
obj-$(CONFIG_XFRM_ALGO) += xfrm_algo.o
obj-$(CONFIG_XFRM_USER) += xfrm_user.o

138
net/xfrm/xfrm_device.c
View File

@ -22,13 +22,149 @@
#include <net/xfrm.h>
#include <linux/notifier.h>
int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
struct xfrm_user_offload *xuo)
{
int err;
struct dst_entry *dst;
struct net_device *dev;
struct xfrm_state_offload *xso = &x->xso;
xfrm_address_t *saddr;
xfrm_address_t *daddr;
if (!x->type_offload)
return 0;
/* We don't yet support UDP encapsulation, TFC padding and ESN. */
if (x->encap || x->tfcpad || (x->props.flags & XFRM_STATE_ESN))
return 0;
dev = dev_get_by_index(net, xuo->ifindex);
if (!dev) {
if (!(xuo->flags & XFRM_OFFLOAD_INBOUND)) {
saddr = &x->props.saddr;
daddr = &x->id.daddr;
} else {
saddr = &x->id.daddr;
daddr = &x->props.saddr;
}
dst = __xfrm_dst_lookup(net, 0, 0, saddr, daddr, x->props.family);
if (IS_ERR(dst))
return 0;
dev = dst->dev;
dev_hold(dev);
dst_release(dst);
}
if (!dev->xfrmdev_ops || !dev->xfrmdev_ops->xdo_dev_state_add) {
dev_put(dev);
return 0;
}
xso->dev = dev;
xso->num_exthdrs = 1;
xso->flags = xuo->flags;
err = dev->xfrmdev_ops->xdo_dev_state_add(x);
if (err) {
dev_put(dev);
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(xfrm_dev_state_add);
bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
{
int mtu;
struct dst_entry *dst = skb_dst(skb);
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
struct net_device *dev = x->xso.dev;
if (!x->type_offload || x->encap)
return false;
if ((x->xso.offload_handle && (dev == dst->path->dev)) &&
!dst->child->xfrm && x->type->get_mtu) {
mtu = x->type->get_mtu(x, xdst->child_mtu_cached);
if (skb->len <= mtu)
goto ok;
if (skb_is_gso(skb) && skb_gso_validate_mtu(skb, mtu))
goto ok;
}
return false;
ok:
if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_offload_ok)
return x->xso.dev->xfrmdev_ops->xdo_dev_offload_ok(skb, x);
return true;
}
EXPORT_SYMBOL_GPL(xfrm_dev_offload_ok);
int xfrm_dev_register(struct net_device *dev)
{
if ((dev->features & NETIF_F_HW_ESP) && !dev->xfrmdev_ops)
return NOTIFY_BAD;
if ((dev->features & NETIF_F_HW_ESP_TX_CSUM) &&
!(dev->features & NETIF_F_HW_ESP))
return NOTIFY_BAD;
return NOTIFY_DONE;
}
static int xfrm_dev_unregister(struct net_device *dev)
{
return NOTIFY_DONE;
}
static int xfrm_dev_feat_change(struct net_device *dev)
{
if ((dev->features & NETIF_F_HW_ESP) && !dev->xfrmdev_ops)
return NOTIFY_BAD;
else if (!(dev->features & NETIF_F_HW_ESP))
dev->xfrmdev_ops = NULL;
if ((dev->features & NETIF_F_HW_ESP_TX_CSUM) &&
!(dev->features & NETIF_F_HW_ESP))
return NOTIFY_BAD;
return NOTIFY_DONE;
}
static int xfrm_dev_down(struct net_device *dev)
{
if (dev->hw_features & NETIF_F_HW_ESP)
xfrm_dev_state_flush(dev_net(dev), dev, true);
xfrm_garbage_collect(dev_net(dev));
return NOTIFY_DONE;
}
static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
switch (event) {
case NETDEV_REGISTER:
return xfrm_dev_register(dev);
case NETDEV_UNREGISTER:
return xfrm_dev_unregister(dev);
case NETDEV_FEAT_CHANGE:
return xfrm_dev_feat_change(dev);
case NETDEV_DOWN:
xfrm_garbage_collect(dev_net(dev));
return xfrm_dev_down(dev);
}
return NOTIFY_DONE;
}

41
net/xfrm/xfrm_input.c
View File

@ -107,6 +107,8 @@ struct sec_path *secpath_dup(struct sec_path *src)
sp->len = 0;
sp->olen = 0;
memset(sp->ovec, 0, sizeof(sp->ovec[XFRM_MAX_OFFLOAD_DEPTH]));
if (src) {
int i;
@ -207,8 +209,9 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
unsigned int family;
int decaps = 0;
int async = 0;
struct xfrm_offload *xo;
bool xfrm_gro = false;
bool crypto_done = false;
struct xfrm_offload *xo = xfrm_offload(skb);
if (encap_type < 0) {
x = xfrm_input_state(skb);
@ -226,6 +229,37 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
goto lock;
}
if (xo && (xo->flags & CRYPTO_DONE)) {
crypto_done = true;
x = xfrm_input_state(skb);
family = XFRM_SPI_SKB_CB(skb)->family;
if (!(xo->status & CRYPTO_SUCCESS)) {
if (xo->status &
(CRYPTO_TRANSPORT_AH_AUTH_FAILED |
CRYPTO_TRANSPORT_ESP_AUTH_FAILED |
CRYPTO_TUNNEL_AH_AUTH_FAILED |
CRYPTO_TUNNEL_ESP_AUTH_FAILED)) {
xfrm_audit_state_icvfail(x, skb,
x->type->proto);
x->stats.integrity_failed++;
XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEPROTOERROR);
goto drop;
}
XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR);
goto drop;
}
if ((err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR);
goto drop;
}
goto lock;
}
daddr = (xfrm_address_t *)(skb_network_header(skb) +
XFRM_SPI_SKB_CB(skb)->daddroff);
family = XFRM_SPI_SKB_CB(skb)->family;
@ -311,7 +345,10 @@ lock:
skb_dst_force(skb);
dev_hold(skb->dev);
nexthdr = x->type->input(x, skb);
if (crypto_done)
nexthdr = x->type_offload->input_tail(x, skb);
else
nexthdr = x->type->input(x, skb);
if (nexthdr == -EINPROGRESS)
return 0;

44
net/xfrm/xfrm_output.c
View File

@ -99,12 +99,13 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
skb_dst_force(skb);
/* Inner headers are invalid now. */
skb->encapsulation = 0;
err = x->type->output(x, skb);
if (err == -EINPROGRESS)
goto out;
if (xfrm_offload(skb)) {
x->type_offload->encap(x, skb);
} else {
err = x->type->output(x, skb);
if (err == -EINPROGRESS)
goto out;
}
resume:
if (err) {
@ -200,8 +201,38 @@ static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb
int xfrm_output(struct sock *sk, struct sk_buff *skb)
{
struct net *net = dev_net(skb_dst(skb)->dev);
struct xfrm_state *x = skb_dst(skb)->xfrm;
int err;
secpath_reset(skb);
if (xfrm_dev_offload_ok(skb, x)) {
struct sec_path *sp;
sp = secpath_dup(skb->sp);
if (!sp) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
kfree_skb(skb);
return -ENOMEM;
}
if (skb->sp)
secpath_put(skb->sp);
skb->sp = sp;
sp->olen++;
sp->xvec[skb->sp->len++] = x;
xfrm_state_hold(x);
if (skb_is_gso(skb)) {
skb_shinfo(skb)->gso_type |= SKB_GSO_ESP;
return xfrm_output2(net, sk, skb);
}
if (x->xso.dev && x->xso.dev->features & NETIF_F_HW_ESP_TX_CSUM)
goto out;
}
if (skb_is_gso(skb))
return xfrm_output_gso(net, sk, skb);
@ -214,6 +245,7 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
}
}
out:
return xfrm_output2(net, sk, skb);
}
EXPORT_SYMBOL_GPL(xfrm_output);

10
net/xfrm/xfrm_policy.c
View File

@ -116,11 +116,10 @@ static const struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short fa
return afinfo;
}
static inline struct dst_entry *__xfrm_dst_lookup(struct net *net,
int tos, int oif,
const xfrm_address_t *saddr,
const xfrm_address_t *daddr,
int family)
struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
const xfrm_address_t *saddr,
const xfrm_address_t *daddr,
int family)
{
const struct xfrm_policy_afinfo *afinfo;
struct dst_entry *dst;
@ -135,6 +134,7 @@ static inline struct dst_entry *__xfrm_dst_lookup(struct net *net,
return dst;
}
EXPORT_SYMBOL(__xfrm_dst_lookup);
static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x,
int tos, int oif,

74
net/xfrm/xfrm_state.c
View File

@ -440,6 +440,7 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x)
x->type->destructor(x);
xfrm_put_type(x->type);
}
xfrm_dev_state_free(x);
security_xfrm_state_free(x);
kfree(x);
}
@ -609,6 +610,8 @@ int __xfrm_state_delete(struct xfrm_state *x)
net->xfrm.state_num--;
spin_unlock(&net->xfrm.xfrm_state_lock);
xfrm_dev_state_delete(x);
/* All xfrm_state objects are created by xfrm_state_alloc.
* The xfrm_state_alloc call gives a reference, and that
* is what we are dropping here.
@ -653,12 +656,41 @@ xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
return err;
}
static inline int
xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
{
int i, err = 0;
for (i = 0; i <= net->xfrm.state_hmask; i++) {
struct xfrm_state *x;
struct xfrm_state_offload *xso;
hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
xso = &x->xso;
if (xso->dev == dev &&
(err = security_xfrm_state_delete(x)) != 0) {
xfrm_audit_state_delete(x, 0, task_valid);
return err;
}
}
}
return err;
}
#else
static inline int
xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
{
return 0;
}
static inline int
xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
{
return 0;
}
#endif
int xfrm_state_flush(struct net *net, u8 proto, bool task_valid)
@ -701,6 +733,48 @@ out:
}
EXPORT_SYMBOL(xfrm_state_flush);
int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
{
int i, err = 0, cnt = 0;
spin_lock_bh(&net->xfrm.xfrm_state_lock);
err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
if (err)
goto out;
err = -ESRCH;
for (i = 0; i <= net->xfrm.state_hmask; i++) {
struct xfrm_state *x;
struct xfrm_state_offload *xso;
restart:
hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
xso = &x->xso;
if (!xfrm_state_kern(x) && xso->dev == dev) {
xfrm_state_hold(x);
spin_unlock_bh(&net->xfrm.xfrm_state_lock);
err = xfrm_state_delete(x);
xfrm_audit_state_delete(x, err ? 0 : 1,
task_valid);
xfrm_state_put(x);
if (!err)
cnt++;
spin_lock_bh(&net->xfrm.xfrm_state_lock);
goto restart;
}
}
}
if (cnt)
err = 0;
out:
spin_unlock_bh(&net->xfrm.xfrm_state_lock);
return err;
}
EXPORT_SYMBOL(xfrm_dev_state_flush);
void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
{
spin_lock_bh(&net->xfrm.xfrm_state_lock);

28
net/xfrm/xfrm_user.c
View File

@ -595,6 +595,10 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
goto error;
}
if (attrs[XFRMA_OFFLOAD_DEV] &&
xfrm_dev_state_add(net, x, nla_data(attrs[XFRMA_OFFLOAD_DEV])))
goto error;
if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
attrs[XFRMA_REPLAY_ESN_VAL])))
goto error;
@ -779,6 +783,23 @@ static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
return 0;
}
static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
{
struct xfrm_user_offload *xuo;
struct nlattr *attr;
attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
if (attr == NULL)
return -EMSGSIZE;
xuo = nla_data(attr);
xuo->ifindex = xso->dev->ifindex;
xuo->flags = xso->flags;
return 0;
}
static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
{
struct xfrm_algo *algo;
@ -869,6 +890,10 @@ static int copy_to_user_state_extra(struct xfrm_state *x,
&x->replay);
if (ret)
goto out;
if(x->xso.dev)
ret = copy_user_offload(&x->xso, skb);
if (ret)
goto out;
if (x->security)
ret = copy_sec_ctx(x->security, skb);
out:
@ -2406,6 +2431,7 @@ static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
[XFRMA_PROTO] = { .type = NLA_U8 },
[XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
[XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
};
static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
@ -2622,6 +2648,8 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x)
l += nla_total_size(sizeof(*x->coaddr));
if (x->props.extra_flags)
l += nla_total_size(sizeof(x->props.extra_flags));
if (x->xso.dev)
l += nla_total_size(sizeof(x->xso));
/* Must count x->lastused as it may become non-zero behind our back. */
l += nla_total_size_64bit(sizeof(u64));