* - Compression stats.
* - Adaptive compression.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <asm/scatterlist.h>
#include <asm/semaphore.h>
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <linux/rtnetlink.h>
+#include <linux/mutex.h>
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/icmp.h>
struct ipcomp_tfms {
struct list_head list;
- struct crypto_tfm **tfms;
+ struct crypto_comp **tfms;
int users;
};
-static DECLARE_MUTEX(ipcomp_resource_sem);
+static DEFINE_MUTEX(ipcomp_resource_mutex);
static void **ipcomp_scratches;
static int ipcomp_scratch_users;
static LIST_HEAD(ipcomp_tfms_list);
static int ipcomp_decompress(struct xfrm_state *x, struct sk_buff *skb)
{
int err, plen, dlen;
- struct iphdr *iph;
struct ipcomp_data *ipcd = x->data;
u8 *start, *scratch;
- struct crypto_tfm *tfm;
+ struct crypto_comp *tfm;
int cpu;
plen = skb->len;
if (err)
goto out;
- skb_put(skb, dlen - plen);
+ skb->truesize += dlen - plen;
+ __skb_put(skb, dlen - plen);
memcpy(skb->data, scratch, dlen);
- iph = skb->nh.iph;
- iph->tot_len = htons(dlen + iph->ihl * 4);
out:
put_cpu();
return err;
}
-static int ipcomp_input(struct xfrm_state *x,
- struct xfrm_decap_state *decap, struct sk_buff *skb)
+static int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb)
{
- u8 nexthdr;
- int err = 0;
+ int err = -ENOMEM;
struct iphdr *iph;
- union {
- struct iphdr iph;
- char buf[60];
- } tmp_iph;
-
+ struct ip_comp_hdr *ipch;
- if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
- skb_linearize(skb, GFP_ATOMIC) != 0) {
- err = -ENOMEM;
+ if (skb_linearize_cow(skb))
goto out;
- }
skb->ip_summed = CHECKSUM_NONE;
/* Remove ipcomp header and decompress original payload */
iph = skb->nh.iph;
- memcpy(&tmp_iph, iph, iph->ihl * 4);
- nexthdr = *(u8 *)skb->data;
- skb_pull(skb, sizeof(struct ip_comp_hdr));
- skb->nh.raw += sizeof(struct ip_comp_hdr);
- memcpy(skb->nh.raw, &tmp_iph, tmp_iph.iph.ihl * 4);
- iph = skb->nh.iph;
- iph->tot_len = htons(ntohs(iph->tot_len) - sizeof(struct ip_comp_hdr));
- iph->protocol = nexthdr;
- skb->h.raw = skb->data;
+ ipch = (void *)skb->data;
+ iph->protocol = ipch->nexthdr;
+ skb->h.raw = skb->nh.raw + sizeof(*ipch);
+ __skb_pull(skb, sizeof(*ipch));
err = ipcomp_decompress(x, skb);
out:
struct iphdr *iph = skb->nh.iph;
struct ipcomp_data *ipcd = x->data;
u8 *start, *scratch;
- struct crypto_tfm *tfm;
+ struct crypto_comp *tfm;
int cpu;
ihlen = iph->ihl * 4;
goto out_ok;
}
- if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
- skb_linearize(skb, GFP_ATOMIC) != 0) {
+ if (skb_linearize_cow(skb))
goto out_ok;
- }
err = ipcomp_compress(x, skb);
iph = skb->nh.iph;
return 0;
out_ok:
- if (x->props.mode)
+ if (x->props.mode == XFRM_MODE_TUNNEL)
ip_send_check(iph);
return 0;
}
static void ipcomp4_err(struct sk_buff *skb, u32 info)
{
- u32 spi;
+ __be32 spi;
struct iphdr *iph = (struct iphdr *)skb->data;
struct ip_comp_hdr *ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
struct xfrm_state *x;
skb->h.icmph->code != ICMP_FRAG_NEEDED)
return;
- spi = ntohl(ntohs(ipch->cpi));
+ spi = htonl(ntohs(ipch->cpi));
x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr,
spi, IPPROTO_COMP, AF_INET);
if (!x)
static struct xfrm_state *ipcomp_tunnel_create(struct xfrm_state *x)
{
struct xfrm_state *t;
+ u8 mode = XFRM_MODE_TUNNEL;
t = xfrm_state_alloc();
if (t == NULL)
t->id.daddr.a4 = x->id.daddr.a4;
memcpy(&t->sel, &x->sel, sizeof(t->sel));
t->props.family = AF_INET;
- t->props.mode = 1;
+ if (x->props.mode == XFRM_MODE_BEET)
+ mode = x->props.mode;
+ t->props.mode = mode;
t->props.saddr.a4 = x->props.saddr.a4;
t->props.flags = x->props.flags;
}
/*
- * Must be protected by xfrm_cfg_sem. State and tunnel user references are
+ * Must be protected by xfrm_cfg_mutex. State and tunnel user references are
* always incremented on success.
*/
static int ipcomp_tunnel_attach(struct xfrm_state *x)
if (!scratches)
return;
- for_each_cpu(i) {
- void *scratch = *per_cpu_ptr(scratches, i);
- if (scratch)
- vfree(scratch);
- }
+ for_each_possible_cpu(i)
+ vfree(*per_cpu_ptr(scratches, i));
free_percpu(scratches);
}
ipcomp_scratches = scratches;
- for_each_cpu(i) {
+ for_each_possible_cpu(i) {
void *scratch = vmalloc(IPCOMP_SCRATCH_SIZE);
if (!scratch)
return NULL;
return scratches;
}
-static void ipcomp_free_tfms(struct crypto_tfm **tfms)
+static void ipcomp_free_tfms(struct crypto_comp **tfms)
{
struct ipcomp_tfms *pos;
int cpu;
if (!tfms)
return;
- for_each_cpu(cpu) {
- struct crypto_tfm *tfm = *per_cpu_ptr(tfms, cpu);
- crypto_free_tfm(tfm);
+ for_each_possible_cpu(cpu) {
+ struct crypto_comp *tfm = *per_cpu_ptr(tfms, cpu);
+ crypto_free_comp(tfm);
}
free_percpu(tfms);
}
-static struct crypto_tfm **ipcomp_alloc_tfms(const char *alg_name)
+static struct crypto_comp **ipcomp_alloc_tfms(const char *alg_name)
{
struct ipcomp_tfms *pos;
- struct crypto_tfm **tfms;
+ struct crypto_comp **tfms;
int cpu;
/* This can be any valid CPU ID so we don't need locking. */
cpu = raw_smp_processor_id();
list_for_each_entry(pos, &ipcomp_tfms_list, list) {
- struct crypto_tfm *tfm;
+ struct crypto_comp *tfm;
tfms = pos->tfms;
tfm = *per_cpu_ptr(tfms, cpu);
- if (!strcmp(crypto_tfm_alg_name(tfm), alg_name)) {
+ if (!strcmp(crypto_comp_name(tfm), alg_name)) {
pos->users++;
return tfms;
}
INIT_LIST_HEAD(&pos->list);
list_add(&pos->list, &ipcomp_tfms_list);
- pos->tfms = tfms = alloc_percpu(struct crypto_tfm *);
+ pos->tfms = tfms = alloc_percpu(struct crypto_comp *);
if (!tfms)
goto error;
- for_each_cpu(cpu) {
- struct crypto_tfm *tfm = crypto_alloc_tfm(alg_name, 0);
+ for_each_possible_cpu(cpu) {
+ struct crypto_comp *tfm = crypto_alloc_comp(alg_name, 0,
+ CRYPTO_ALG_ASYNC);
if (!tfm)
goto error;
*per_cpu_ptr(tfms, cpu) = tfm;
if (!ipcd)
return;
xfrm_state_delete_tunnel(x);
- down(&ipcomp_resource_sem);
+ mutex_lock(&ipcomp_resource_mutex);
ipcomp_free_data(ipcd);
- up(&ipcomp_resource_sem);
+ mutex_unlock(&ipcomp_resource_mutex);
kfree(ipcd);
}
goto out;
err = -ENOMEM;
- ipcd = kmalloc(sizeof(*ipcd), GFP_KERNEL);
+ ipcd = kzalloc(sizeof(*ipcd), GFP_KERNEL);
if (!ipcd)
goto out;
- memset(ipcd, 0, sizeof(*ipcd));
x->props.header_len = 0;
- if (x->props.mode)
+ if (x->props.mode == XFRM_MODE_TUNNEL)
x->props.header_len += sizeof(struct iphdr);
- down(&ipcomp_resource_sem);
+ mutex_lock(&ipcomp_resource_mutex);
if (!ipcomp_alloc_scratches())
goto error;
ipcd->tfms = ipcomp_alloc_tfms(x->calg->alg_name);
if (!ipcd->tfms)
goto error;
- up(&ipcomp_resource_sem);
+ mutex_unlock(&ipcomp_resource_mutex);
- if (x->props.mode) {
+ if (x->props.mode == XFRM_MODE_TUNNEL) {
err = ipcomp_tunnel_attach(x);
if (err)
goto error_tunnel;
return err;
error_tunnel:
- down(&ipcomp_resource_sem);
+ mutex_lock(&ipcomp_resource_mutex);
error:
ipcomp_free_data(ipcd);
- up(&ipcomp_resource_sem);
+ mutex_unlock(&ipcomp_resource_mutex);
kfree(ipcd);
goto out;
}
git://git.onelab.eu / linux-2.6.git / blobdiff