dccp: Clean up ccid.c after integration of CCID plugins

This patch cleans up after integrating the CCID modules and, in addition,

 * moves the if/else cases from ccid_delete() into ccid_hc_{tx,rx}_delete();
 * removes the 'gfp' argument to ccid_new() - since it is always gfp_any().

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker 2009-01-04 21:43:23 -08:00 committed by David S. Miller
parent ddebc973c5
commit e5fd56ca4e
4 changed files with 14 additions and 176 deletions

View file

@ -84,7 +84,6 @@ struct dccp_ackvec_record {
struct sock;
struct sk_buff;
#ifndef ___OLD_INTERFACE_TO_BE_REMOVED___
extern int dccp_ackvec_init(void);
extern void dccp_ackvec_exit(void);
@ -106,52 +105,4 @@ static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
{
return av->av_vec_len;
}
#else /* ___OLD_INTERFACE_TO_BE_REMOVED___ */
static inline int dccp_ackvec_init(void)
{
return 0;
}
static inline void dccp_ackvec_exit(void)
{
}
static inline struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
{
return NULL;
}
static inline void dccp_ackvec_free(struct dccp_ackvec *av)
{
}
static inline int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
const u64 ackno, const u8 state)
{
return -1;
}
static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
struct sock *sk, const u64 ackno)
{
}
static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
const u64 *ackno, const u8 opt,
const u8 *value, const u8 len)
{
return -1;
}
static inline int dccp_insert_option_ackvec(const struct sock *sk,
const struct sk_buff *skb)
{
return -1;
}
static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
{
return 0;
}
#endif /* CONFIG_IP_DCCP_ACKVEC */
#endif /* _ACKVEC_H */

View file

@ -76,58 +76,6 @@ int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
return err;
}
#ifdef ___OLD_INTERFACE_TO_BE_REMOVED___
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);
static DEFINE_SPINLOCK(ccids_lock);
/*
* The strategy is: modifications ccids vector are short, do not sleep and
* veeery rare, but read access should be free of any exclusive locks.
*/
static void ccids_write_lock(void)
{
spin_lock(&ccids_lock);
while (atomic_read(&ccids_lockct) != 0) {
spin_unlock(&ccids_lock);
yield();
spin_lock(&ccids_lock);
}
}
static inline void ccids_write_unlock(void)
{
spin_unlock(&ccids_lock);
}
static inline void ccids_read_lock(void)
{
atomic_inc(&ccids_lockct);
smp_mb__after_atomic_inc();
spin_unlock_wait(&ccids_lock);
}
static inline void ccids_read_unlock(void)
{
atomic_dec(&ccids_lockct);
}
#else
#define ccids_write_lock() do { } while(0)
#define ccids_write_unlock() do { } while(0)
#define ccids_read_lock() do { } while(0)
#define ccids_read_unlock() do { } while(0)
#endif
#endif /* ___OLD_INTERFACE_TO_BE_REMOVED___ */
static struct kmem_cache *ccid_kmem_cache_create(int obj_size, const char *fmt,...)
{
struct kmem_cache *slab;
@ -158,49 +106,6 @@ static void ccid_kmem_cache_destroy(struct kmem_cache *slab)
}
}
#ifdef ___OLD_INTERFACE_TO_BE_REMOVED___
/* 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;
}
#endif /* ___OLD_INTERFACE_TO_BE_REMOVED___ */
static int ccid_activate(struct ccid_operations *ccid_ops)
{
int err = -ENOBUFS;
@ -241,7 +146,7 @@ static void ccid_deactivate(struct ccid_operations *ccid_ops)
ccid_ops->ccid_id, ccid_ops->ccid_name);
}
struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx)
{
struct ccid_operations *ccid_ops = ccid_by_number(id);
struct ccid *ccid = NULL;
@ -250,7 +155,7 @@ struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
goto out;
ccid = kmem_cache_alloc(rx ? ccid_ops->ccid_hc_rx_slab :
ccid_ops->ccid_hc_tx_slab, gfp);
ccid_ops->ccid_hc_tx_slab, gfp_any());
if (ccid == NULL)
goto out;
ccid->ccid_ops = ccid_ops;
@ -274,41 +179,24 @@ out_free_ccid:
goto out;
}
EXPORT_SYMBOL_GPL(ccid_new);
static void ccid_delete(struct ccid *ccid, struct sock *sk, int rx)
void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk)
{
struct ccid_operations *ccid_ops;
if (ccid == NULL)
return;
ccid_ops = ccid->ccid_ops;
if (rx) {
if (ccid_ops->ccid_hc_rx_exit != NULL)
ccid_ops->ccid_hc_rx_exit(sk);
kmem_cache_free(ccid_ops->ccid_hc_rx_slab, ccid);
} else {
if (ccid_ops->ccid_hc_tx_exit != NULL)
ccid_ops->ccid_hc_tx_exit(sk);
kmem_cache_free(ccid_ops->ccid_hc_tx_slab, ccid);
if (ccid != NULL) {
if (ccid->ccid_ops->ccid_hc_rx_exit != NULL)
ccid->ccid_ops->ccid_hc_rx_exit(sk);
kmem_cache_free(ccid->ccid_ops->ccid_hc_rx_slab, ccid);
}
}
void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk)
{
ccid_delete(ccid, sk, 1);
}
EXPORT_SYMBOL_GPL(ccid_hc_rx_delete);
void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk)
{
ccid_delete(ccid, sk, 0);
if (ccid != NULL) {
if (ccid->ccid_ops->ccid_hc_tx_exit != NULL)
ccid->ccid_ops->ccid_hc_tx_exit(sk);
kmem_cache_free(ccid->ccid_ops->ccid_hc_tx_slab, ccid);
}
}
EXPORT_SYMBOL_GPL(ccid_hc_tx_delete);
int __init ccid_initialize_builtins(void)
{
int i, err;

View file

@ -111,8 +111,7 @@ extern int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
extern int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
char __user *, int __user *);
extern struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx,
gfp_t gfp);
extern struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);
static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
{

View file

@ -34,7 +34,7 @@
static int dccp_hdlr_ccid(struct sock *sk, u64 ccid, bool rx)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid *new_ccid = ccid_new(ccid, sk, rx, gfp_any());
struct ccid *new_ccid = ccid_new(ccid, sk, rx);
if (new_ccid == NULL)
return -ENOMEM;