return ARRAY_SIZE(calg_list);
}
-/* Todo: generic iterators */
-struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
-{
- int i;
-
- for (i = 0; i < aalg_entries(); i++) {
- if (aalg_list[i].desc.sadb_alg_id == alg_id) {
- if (aalg_list[i].available)
- return &aalg_list[i];
- else
- break;
- }
- }
- return NULL;
-}
-EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
-
-struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
-{
- int i;
+struct xfrm_algo_list {
+ struct xfrm_algo_desc *algs;
+ int entries;
+ u32 type;
+ u32 mask;
+};
- for (i = 0; i < ealg_entries(); i++) {
- if (ealg_list[i].desc.sadb_alg_id == alg_id) {
- if (ealg_list[i].available)
- return &ealg_list[i];
- else
- break;
- }
- }
- return NULL;
-}
-EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
+static const struct xfrm_algo_list xfrm_aalg_list = {
+ .algs = aalg_list,
+ .entries = ARRAY_SIZE(aalg_list),
+ .type = CRYPTO_ALG_TYPE_HASH,
+ .mask = CRYPTO_ALG_TYPE_HASH_MASK | CRYPTO_ALG_ASYNC,
+};
-struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
-{
- int i;
+static const struct xfrm_algo_list xfrm_ealg_list = {
+ .algs = ealg_list,
+ .entries = ARRAY_SIZE(ealg_list),
+ .type = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .mask = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC,
+};
- for (i = 0; i < calg_entries(); i++) {
- if (calg_list[i].desc.sadb_alg_id == alg_id) {
- if (calg_list[i].available)
- return &calg_list[i];
- else
- break;
- }
- }
- return NULL;
-}
-EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
+static const struct xfrm_algo_list xfrm_calg_list = {
+ .algs = calg_list,
+ .entries = ARRAY_SIZE(calg_list),
+ .type = CRYPTO_ALG_TYPE_COMPRESS,
+ .mask = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC,
+};
-static struct xfrm_algo_desc *xfrm_get_byname(struct xfrm_algo_desc *list,
- int entries, u32 type, u32 mask,
- char *name, int probe)
+static struct xfrm_algo_desc *xfrm_find_algo(
+ const struct xfrm_algo_list *algo_list,
+ int match(const struct xfrm_algo_desc *entry, const void *data),
+ const void *data, int probe)
{
+ struct xfrm_algo_desc *list = algo_list->algs;
int i, status;
- if (!name)
- return NULL;
-
- for (i = 0; i < entries; i++) {
- if (strcmp(name, list[i].name) &&
- (!list[i].compat || strcmp(name, list[i].compat)))
+ for (i = 0; i < algo_list->entries; i++) {
+ if (!match(list + i, data))
continue;
if (list[i].available)
if (!probe)
break;
- status = crypto_has_alg(list[i].name, type,
- mask | CRYPTO_ALG_ASYNC);
+ status = crypto_has_alg(list[i].name, algo_list->type,
+ algo_list->mask);
if (!status)
break;
return NULL;
}
+static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
+ const void *data)
+{
+ return entry->desc.sadb_alg_id == (unsigned long)data;
+}
+
+struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
+{
+ return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
+ (void *)(unsigned long)alg_id, 1);
+}
+EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
+
+struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
+{
+ return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
+ (void *)(unsigned long)alg_id, 1);
+}
+EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
+
+struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
+{
+ return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
+ (void *)(unsigned long)alg_id, 1);
+}
+EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
+
+static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
+ const void *data)
+{
+ const char *name = data;
+
+ return name && (!strcmp(name, entry->name) ||
+ (entry->compat && !strcmp(name, entry->compat)));
+}
+
struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe)
{
- return xfrm_get_byname(aalg_list, aalg_entries(),
- CRYPTO_ALG_TYPE_HASH, CRYPTO_ALG_TYPE_HASH_MASK,
- name, probe);
+ return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
+ probe);
}
EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe)
{
- return xfrm_get_byname(ealg_list, ealg_entries(),
- CRYPTO_ALG_TYPE_BLKCIPHER, CRYPTO_ALG_TYPE_MASK,
- name, probe);
+ return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
+ probe);
}
EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe)
{
- return xfrm_get_byname(calg_list, calg_entries(),
- CRYPTO_ALG_TYPE_COMPRESS, CRYPTO_ALG_TYPE_MASK,
- name, probe);
+ return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
+ probe);
}
EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *desc,
int offset, int len, icv_update_fn_t icv_update)
{
- int end = skb_headlen(skb);
- int i, copy = end - offset;
+ int start = skb_headlen(skb);
+ int i, copy = start - offset;
int err;
struct scatterlist sg;
}
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- BUG_TRAP(len >= 0);
+ int end;
+
+ BUG_TRAP(start <= offset + len);
- end = offset + skb_shinfo(skb)->frags[i].size;
+ end = start + skb_shinfo(skb)->frags[i].size;
if ((copy = end - offset) > 0) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
copy = len;
sg.page = frag->page;
- sg.offset = frag->page_offset;
+ sg.offset = frag->page_offset + offset-start;
sg.length = copy;
err = icv_update(desc, &sg, copy);
return 0;
offset += copy;
}
+ start = end;
}
if (skb_shinfo(skb)->frag_list) {
struct sk_buff *list = skb_shinfo(skb)->frag_list;
for (; list; list = list->next) {
- BUG_TRAP(len >= 0);
+ int end;
+
+ BUG_TRAP(start <= offset + len);
- end = offset + list->len;
+ end = start + list->len;
if ((copy = end - offset) > 0) {
if (copy > len)
copy = len;
- err = skb_icv_walk(list, desc, 0,
+ err = skb_icv_walk(list, desc, offset-start,
copy, icv_update);
if (unlikely(err))
return err;
return 0;
offset += copy;
}
+ start = end;
}
}
BUG_ON(len);
projects / cascardo / linux.git / blobdiff