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Diffstat (limited to 'net/dccp/ccid.c')
-rw-r--r--net/dccp/ccid.c101
1 files changed, 24 insertions, 77 deletions
diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index e3fb52b4f5c..4809753d12a 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -13,13 +13,6 @@
#include "ccid.h"
-static u8 builtin_ccids[] = {
- DCCPC_CCID2, /* CCID2 is supported by default */
-#if defined(CONFIG_IP_DCCP_CCID3) || defined(CONFIG_IP_DCCP_CCID3_MODULE)
- DCCPC_CCID3,
-#endif
-};
-
static struct ccid_operations *ccids[CCID_MAX];
#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
static atomic_t ccids_lockct = ATOMIC_INIT(0);
@@ -93,47 +86,6 @@ static void ccid_kmem_cache_destroy(struct kmem_cache *slab)
}
}
-/* check that up to @array_len members in @ccid_array are supported */
-bool ccid_support_check(u8 const *ccid_array, u8 array_len)
-{
- u8 i, j, found;
-
- for (i = 0, found = 0; i < array_len; i++, found = 0) {
- for (j = 0; !found && j < ARRAY_SIZE(builtin_ccids); j++)
- found = (ccid_array[i] == builtin_ccids[j]);
- if (!found)
- return false;
- }
- return true;
-}
-
-/**
- * ccid_get_builtin_ccids - Provide copy of `builtin' CCID array
- * @ccid_array: pointer to copy into
- * @array_len: value to return length into
- * This function allocates memory - caller must see that it is freed after use.
- */
-int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len)
-{
- *ccid_array = kmemdup(builtin_ccids, sizeof(builtin_ccids), gfp_any());
- if (*ccid_array == NULL)
- return -ENOBUFS;
- *array_len = ARRAY_SIZE(builtin_ccids);
- return 0;
-}
-
-int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
- char __user *optval, int __user *optlen)
-{
- if (len < sizeof(builtin_ccids))
- return -EINVAL;
-
- if (put_user(sizeof(builtin_ccids), optlen) ||
- copy_to_user(optval, builtin_ccids, sizeof(builtin_ccids)))
- return -EFAULT;
- return 0;
-}
-
int ccid_register(struct ccid_operations *ccid_ops)
{
int err = -ENOBUFS;
@@ -196,41 +148,22 @@ int ccid_unregister(struct ccid_operations *ccid_ops)
EXPORT_SYMBOL_GPL(ccid_unregister);
-/**
- * ccid_request_module - Pre-load CCID module for later use
- * This should be called only from process context (e.g. during connection
- * setup) and is necessary for later calls to ccid_new (typically in software
- * interrupt), so that it has the modules available when they are needed.
- */
-static int ccid_request_module(u8 id)
-{
- if (!in_atomic()) {
- ccids_read_lock();
- if (ccids[id] == NULL) {
- ccids_read_unlock();
- return request_module("net-dccp-ccid-%d", id);
- }
- ccids_read_unlock();
- }
- return 0;
-}
-
-int ccid_request_modules(u8 const *ccid_array, u8 array_len)
-{
-#ifdef CONFIG_KMOD
- while (array_len--)
- if (ccid_request_module(ccid_array[array_len]))
- return -1;
-#endif
- return 0;
-}
-
struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
{
struct ccid_operations *ccid_ops;
struct ccid *ccid = NULL;
ccids_read_lock();
+#ifdef CONFIG_KMOD
+ if (ccids[id] == NULL) {
+ /* We only try to load if in process context */
+ ccids_read_unlock();
+ if (gfp & GFP_ATOMIC)
+ goto out;
+ request_module("net-dccp-ccid-%d", id);
+ ccids_read_lock();
+ }
+#endif
ccid_ops = ccids[id];
if (ccid_ops == NULL)
goto out_unlock;
@@ -272,6 +205,20 @@ out_module_put:
EXPORT_SYMBOL_GPL(ccid_new);
+struct ccid *ccid_hc_rx_new(unsigned char id, struct sock *sk, gfp_t gfp)
+{
+ return ccid_new(id, sk, 1, gfp);
+}
+
+EXPORT_SYMBOL_GPL(ccid_hc_rx_new);
+
+struct ccid *ccid_hc_tx_new(unsigned char id,struct sock *sk, gfp_t gfp)
+{
+ return ccid_new(id, sk, 0, gfp);
+}
+
+EXPORT_SYMBOL_GPL(ccid_hc_tx_new);
+
static void ccid_delete(struct ccid *ccid, struct sock *sk, int rx)
{
struct ccid_operations *ccid_ops;