* - 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>
#include <net/ipcomp.h>
+#include <net/protocol.h>
struct ipcomp_tfms {
struct list_head list;
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;
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:
return err;
}
-static int ipcomp_output(struct sk_buff *skb)
+static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb)
{
int err;
- struct dst_entry *dst = skb->dst;
- struct xfrm_state *x = dst->xfrm;
struct iphdr *iph;
struct ip_comp_hdr *ipch;
struct ipcomp_data *ipcd = x->data;
hdr_len = iph->ihl * 4;
if ((skb->len - hdr_len) < ipcd->threshold) {
/* Don't bother compressing */
- if (x->props.mode) {
- ip_send_check(iph);
- }
goto out_ok;
}
- if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
- skb_linearize(skb, GFP_ATOMIC) != 0) {
- err = -ENOMEM;
- goto error;
- }
+ if (skb_linearize_cow(skb))
+ goto out_ok;
err = ipcomp_compress(x, skb);
+ iph = skb->nh.iph;
+
if (err) {
- if (err == -EMSGSIZE) {
- if (x->props.mode) {
- iph = skb->nh.iph;
- ip_send_check(iph);
- }
- goto out_ok;
- }
- goto error;
+ goto out_ok;
}
/* Install ipcomp header, convert into ipcomp datagram. */
- iph = skb->nh.iph;
iph->tot_len = htons(skb->len);
ipch = (struct ip_comp_hdr *)((char *)iph + iph->ihl * 4);
ipch->nexthdr = iph->protocol;
ipch->cpi = htons((u16 )ntohl(x->id.spi));
iph->protocol = IPPROTO_COMP;
ip_send_check(iph);
+ return 0;
out_ok:
- err = 0;
-
-error:
- return err;
+ if (x->props.mode)
+ ip_send_check(iph);
+ return 0;
}
static void ipcomp4_err(struct sk_buff *skb, u32 info)
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)
return;
- NETDEBUG(printk(KERN_DEBUG "pmtu discovery on SA IPCOMP/%08x/%u.%u.%u.%u\n",
- spi, NIPQUAD(iph->daddr)));
+ NETDEBUG(KERN_DEBUG "pmtu discovery on SA IPCOMP/%08x/%u.%u.%u.%u\n",
+ spi, NIPQUAD(iph->daddr));
xfrm_state_put(x);
}
t->props.mode = 1;
t->props.saddr.a4 = x->props.saddr.a4;
t->props.flags = x->props.flags;
-
- t->type = xfrm_get_type(IPPROTO_IPIP, t->props.family);
- if (t->type == NULL)
- goto error;
-
- if (t->type->init_state(t, NULL))
+
+ if (xfrm_init_state(t))
goto error;
- t->km.state = XFRM_STATE_VALID;
atomic_set(&t->tunnel_users, 1);
out:
return t;
}
/*
- * 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;
if (!tfms)
return;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
struct crypto_tfm *tfm = *per_cpu_ptr(tfms, cpu);
- if (tfm)
- crypto_free_tfm(tfm);
+ crypto_free_tfm(tfm);
}
free_percpu(tfms);
}
int cpu;
/* This can be any valid CPU ID so we don't need locking. */
- cpu = smp_processor_id();
+ cpu = raw_smp_processor_id();
list_for_each_entry(pos, &ipcomp_tfms_list, list) {
struct crypto_tfm *tfm;
if (!tfms)
goto error;
- for_each_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
struct crypto_tfm *tfm = crypto_alloc_tfm(alg_name, 0);
if (!tfm)
goto error;
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);
}
-static int ipcomp_init_state(struct xfrm_state *x, void *args)
+static int ipcomp_init_state(struct xfrm_state *x)
{
int err;
struct ipcomp_data *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)
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) {
err = ipcomp_tunnel_attach(x);
goto error_tunnel;
}
- calg_desc = xfrm_calg_get_byname(x->calg->alg_name);
+ calg_desc = xfrm_calg_get_byname(x->calg->alg_name, 0);
BUG_ON(!calg_desc);
ipcd->threshold = calg_desc->uinfo.comp.threshold;
x->data = ipcd;
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