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net: use skb_sec_path helper in more places 

skb_sec_path gains 'const' qualifier to avoid
xt_policy.c: 'skb_sec_path' discards 'const' qualifier from pointer target type

same reasoning as previous conversions: Won't need to touch these
spots anymore when skb->sp is removed.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2018-12-18 17:15:20 +01:00 committed by David S. Miller
parent 7af8f4ca31
commit 2294be0f11
13 changed files with 52 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/skbuff.h
View File

@ -4124,7 +4124,7 @@ static inline bool skb_get_dst_pending_confirm(const struct sk_buff *skb)
return skb->dst_pending_confirm != 0;
}
static inline struct sec_path *skb_sec_path(struct sk_buff *skb)
static inline struct sec_path *skb_sec_path(const struct sk_buff *skb)
{
#ifdef CONFIG_XFRM
return skb->sp;

6
include/net/xfrm.h
View File

@ -1896,14 +1896,16 @@ static inline void xfrm_states_delete(struct xfrm_state **states, int n)
#ifdef CONFIG_XFRM
static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
{
return skb->sp->xvec[skb->sp->len - 1];
struct sec_path *sp = skb_sec_path(skb);
return sp->xvec[sp->len - 1];
}
#endif
static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
{
#ifdef CONFIG_XFRM
struct sec_path *sp = skb->sp;
struct sec_path *sp = skb_sec_path(skb);
if (!sp || !sp->olen || sp->len != sp->olen)
return NULL;

9
net/ipv4/esp4.c
View File

@ -125,10 +125,13 @@ static void esp_output_done(struct crypto_async_request *base, int err)
void *tmp;
struct xfrm_state *x;
if (xo && (xo->flags & XFRM_DEV_RESUME))
x = skb->sp->xvec[skb->sp->len - 1];
else
if (xo && (xo->flags & XFRM_DEV_RESUME)) {
struct sec_path *sp = skb_sec_path(skb);
x = sp->xvec[sp->len - 1];
} else {
x = skb_dst(skb)->xfrm;
}
tmp = ESP_SKB_CB(skb)->tmp;
esp_ssg_unref(x, tmp);

4
net/ipv4/esp4_offload.c
View File

@ -115,6 +115,7 @@ static struct sk_buff *esp4_gso_segment(struct sk_buff *skb,
struct crypto_aead *aead;
netdev_features_t esp_features = features;
struct xfrm_offload *xo = xfrm_offload(skb);
struct sec_path *sp;
if (!xo)
return ERR_PTR(-EINVAL);
@ -122,7 +123,8 @@ static struct sk_buff *esp4_gso_segment(struct sk_buff *skb,
if (!(skb_shinfo(skb)->gso_type & SKB_GSO_ESP))
return ERR_PTR(-EINVAL);
x = skb->sp->xvec[skb->sp->len - 1];
sp = skb_sec_path(skb);
x = sp->xvec[sp->len - 1];
aead = x->data;
esph = ip_esp_hdr(skb);

9
net/ipv6/esp6.c
View File

@ -145,10 +145,13 @@ static void esp_output_done(struct crypto_async_request *base, int err)
void *tmp;
struct xfrm_state *x;
if (xo && (xo->flags & XFRM_DEV_RESUME))
x = skb->sp->xvec[skb->sp->len - 1];
else
if (xo && (xo->flags & XFRM_DEV_RESUME)) {
struct sec_path *sp = skb_sec_path(skb);
x = sp->xvec[sp->len - 1];
} else {
x = skb_dst(skb)->xfrm;
}
tmp = ESP_SKB_CB(skb)->tmp;
esp_ssg_unref(x, tmp);

4
net/ipv6/esp6_offload.c
View File

@ -142,6 +142,7 @@ static struct sk_buff *esp6_gso_segment(struct sk_buff *skb,
struct crypto_aead *aead;
netdev_features_t esp_features = features;
struct xfrm_offload *xo = xfrm_offload(skb);
struct sec_path *sp;
if (!xo)
return ERR_PTR(-EINVAL);
@ -149,7 +150,8 @@ static struct sk_buff *esp6_gso_segment(struct sk_buff *skb,
if (!(skb_shinfo(skb)->gso_type & SKB_GSO_ESP))
return ERR_PTR(-EINVAL);
x = skb->sp->xvec[skb->sp->len - 1];
sp = skb_sec_path(skb);
x = sp->xvec[sp->len - 1];
aead = x->data;
esph = ip_esp_hdr(skb);

2
net/ipv6/xfrm6_input.c
View File

@ -147,7 +147,7 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
goto drop;
}
skb->sp->xvec[skb->sp->len++] = x;
sp->xvec[sp->len++] = x;
spin_lock(&x->lock);

2
net/netfilter/nft_xfrm.c
View File

@ -161,7 +161,7 @@ static void nft_xfrm_get_eval_in(const struct nft_xfrm *priv,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct sec_path *sp = pkt->skb->sp;
const struct sec_path *sp = skb_sec_path(pkt->skb);
const struct xfrm_state *state;
if (sp == NULL || sp->len <= priv->spnum) {

2
net/netfilter/xt_policy.c
View File

@ -56,7 +56,7 @@ match_policy_in(const struct sk_buff *skb, const struct xt_policy_info *info,
unsigned short family)
{
const struct xt_policy_elem *e;
const struct sec_path *sp = skb->sp;
const struct sec_path *sp = skb_sec_path(skb);
int strict = info->flags & XT_POLICY_MATCH_STRICT;
int i, pos;

4
net/xfrm/xfrm_device.c
View File

@ -32,6 +32,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
struct softnet_data *sd;
netdev_features_t esp_features = features;
struct xfrm_offload *xo = xfrm_offload(skb);
struct sec_path *sp;
if (!xo)
return skb;
@ -39,7 +40,8 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
if (!(features & NETIF_F_HW_ESP))
esp_features = features & ~(NETIF_F_SG | NETIF_F_CSUM_MASK);
x = skb->sp->xvec[skb->sp->len - 1];
sp = skb_sec_path(skb);
x = sp->xvec[sp->len - 1];
if (xo->flags & XFRM_GRO || x->xso.flags & XFRM_OFFLOAD_INBOUND)
return skb;

16
net/xfrm/xfrm_input.c
View File

@ -330,7 +330,9 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
daddr = (xfrm_address_t *)(skb_network_header(skb) +
XFRM_SPI_SKB_CB(skb)->daddroff);
do {
if (skb->sp->len == XFRM_MAX_DEPTH) {
sp = skb_sec_path(skb);
if (sp->len == XFRM_MAX_DEPTH) {
secpath_reset(skb);
XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR);
goto drop;
@ -346,7 +348,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
skb->mark = xfrm_smark_get(skb->mark, x);
skb->sp->xvec[skb->sp->len++] = x;
sp->xvec[sp->len++] = x;
lock:
spin_lock(&x->lock);
@ -470,8 +472,9 @@ resume:
nf_reset(skb);
if (decaps) {
if (skb->sp)
skb->sp->olen = 0;
sp = skb_sec_path(skb);
if (sp)
sp->olen = 0;
skb_dst_drop(skb);
gro_cells_receive(&gro_cells, skb);
return 0;
@ -482,8 +485,9 @@ resume:
err = x->inner_mode->afinfo->transport_finish(skb, xfrm_gro || async);
if (xfrm_gro) {
if (skb->sp)
skb->sp->olen = 0;
sp = skb_sec_path(skb);
if (sp)
sp->olen = 0;
skb_dst_drop(skb);
gro_cells_receive(&gro_cells, skb);
return err;

19
net/xfrm/xfrm_policy.c
View File

@ -3200,11 +3200,12 @@ EXPORT_SYMBOL(xfrm_lookup_route);
static inline int
xfrm_secpath_reject(int idx, struct sk_buff *skb, const struct flowi *fl)
{
struct sec_path *sp = skb_sec_path(skb);
struct xfrm_state *x;
if (!skb->sp || idx < 0 || idx >= skb->sp->len)
if (!sp || idx < 0 || idx >= sp->len)
return 0;
x = skb->sp->xvec[idx];
x = sp->xvec[idx];
if (!x->type->reject)
return 0;
return x->type->reject(x, skb, fl);
@ -3304,6 +3305,7 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
struct flowi fl;
int xerr_idx = -1;
const struct xfrm_if_cb *ifcb;
struct sec_path *sp;
struct xfrm_if *xi;
u32 if_id = 0;
@ -3328,11 +3330,12 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
nf_nat_decode_session(skb, &fl, family);
/* First, check used SA against their selectors. */
if (skb->sp) {
sp = skb_sec_path(skb);
if (sp) {
int i;
for (i = skb->sp->len-1; i >= 0; i--) {
struct xfrm_state *x = skb->sp->xvec[i];
for (i = sp->len - 1; i >= 0; i--) {
struct xfrm_state *x = sp->xvec[i];
if (!xfrm_selector_match(&x->sel, &fl, family)) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMISMATCH);
return 0;
@ -3359,7 +3362,7 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
}
if (!pol) {
if (skb->sp && secpath_has_nontransport(skb->sp, 0, &xerr_idx)) {
if (sp && secpath_has_nontransport(sp, 0, &xerr_idx)) {
xfrm_secpath_reject(xerr_idx, skb, &fl);
XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOPOLS);
return 0;
@ -3388,7 +3391,6 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
#endif
if (pol->action == XFRM_POLICY_ALLOW) {
struct sec_path *sp;
static struct sec_path dummy;
struct xfrm_tmpl *tp[XFRM_MAX_DEPTH];
struct xfrm_tmpl *stp[XFRM_MAX_DEPTH];
@ -3396,7 +3398,8 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
int ti = 0;
int i, k;
if ((sp = skb->sp) == NULL)
sp = skb_sec_path(skb);
if (!sp)
sp = &dummy;
for (pi = 0; pi < npols; pi++) {

4
security/selinux/xfrm.c
View File

@ -230,7 +230,7 @@ static int selinux_xfrm_skb_sid_ingress(struct sk_buff *skb,
u32 *sid, int ckall)
{
u32 sid_session = SECSID_NULL;
struct sec_path *sp = skb->sp;
struct sec_path *sp = skb_sec_path(skb);
if (sp) {
int i;
@ -408,7 +408,7 @@ int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
struct common_audit_data *ad)
{
int i;
struct sec_path *sp = skb->sp;
struct sec_path *sp = skb_sec_path(skb);
u32 peer_sid = SECINITSID_UNLABELED;
if (sp) {