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[DCCP] CCID: Improve CCID infrastructure

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1. No need for ->ccid_init nor ->ccid_exit, this is what module_{init,exit}
   does and anynways neither ccid2 nor ccid3 were using it.

2. Rename struct ccid to struct ccid_operations and introduce struct ccid
   with a pointer to ccid_operations and rigth after it the rx or tx
   private state.

3. Remove the pointer to the state of the half connections from struct
   dccp_sock, now its derived thru ccid_priv() from the ccid pointer.

Now we also can implement the setsockopt for changing the CCID easily as
no ccid init routines can affect struct dccp_sock in any way that prevents
other CCIDs from working if a CCID switch operation is asked by apps.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2006-03-20 19:21:44 -08:00 committed by David S. Miller
parent f38c39d6ce
commit 91f0ebf7b6
10 changed files with 265 additions and 217 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/dccp.h
View File

@ -478,8 +478,6 @@ struct dccp_sock {
__u32 dccps_mss_cache;
struct dccp_options dccps_options;
struct dccp_ackvec *dccps_hc_rx_ackvec;
void *dccps_hc_rx_ccid_private;
void *dccps_hc_tx_ccid_private;
struct ccid *dccps_hc_rx_ccid;
struct ccid *dccps_hc_tx_ccid;
struct dccp_options_received dccps_options_received;

198
net/dccp/ccid.c
View File

@ -13,7 +13,7 @@
#include "ccid.h"
static struct ccid *ccids[CCID_MAX];
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);
@ -55,82 +55,202 @@ static inline void ccids_read_unlock(void)
#define ccids_read_unlock() do { } while(0)
#endif
int ccid_register(struct ccid *ccid)
static kmem_cache_t *ccid_kmem_cache_create(int obj_size, const char *fmt,...)
{
int err;
kmem_cache_t *slab;
char slab_name_fmt[32], *slab_name;
va_list args;
va_start(args, fmt);
vsnprintf(slab_name_fmt, sizeof(slab_name_fmt), fmt, args);
va_end(args);
slab_name = kstrdup(slab_name_fmt, GFP_KERNEL);
if (slab_name == NULL)
return NULL;
slab = kmem_cache_create(slab_name, sizeof(struct ccid) + obj_size, 0,
SLAB_HWCACHE_ALIGN, NULL, NULL);
if (slab == NULL)
kfree(slab_name);
return slab;
}
static void ccid_kmem_cache_destroy(kmem_cache_t *slab)
{
if (slab != NULL) {
const char *name = kmem_cache_name(slab);
kmem_cache_destroy(slab);
kfree(name);
}
}
int ccid_register(struct ccid_operations *ccid_ops)
{
int err = -ENOBUFS;
ccid_ops->ccid_hc_rx_slab =
ccid_kmem_cache_create(ccid_ops->ccid_hc_rx_obj_size,
"%s_hc_rx_sock",
ccid_ops->ccid_name);
if (ccid_ops->ccid_hc_rx_slab == NULL)
goto out;
ccid_ops->ccid_hc_tx_slab =
ccid_kmem_cache_create(ccid_ops->ccid_hc_tx_obj_size,
"%s_hc_tx_sock",
ccid_ops->ccid_name);
if (ccid_ops->ccid_hc_tx_slab == NULL)
goto out_free_rx_slab;
ccids_write_lock();
err = -EEXIST;
if (ccids[ccid->ccid_id] == NULL) {
ccids[ccid->ccid_id] = ccid;
if (ccids[ccid_ops->ccid_id] == NULL) {
ccids[ccid_ops->ccid_id] = ccid_ops;
err = 0;
}
ccids_write_unlock();
if (err == 0)
pr_info("CCID: Registered CCID %d (%s)\n",
ccid->ccid_id, ccid->ccid_name);
if (err != 0)
goto out_free_tx_slab;
pr_info("CCID: Registered CCID %d (%s)\n",
ccid_ops->ccid_id, ccid_ops->ccid_name);
out:
return err;
out_free_tx_slab:
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_tx_slab);
ccid_ops->ccid_hc_tx_slab = NULL;
goto out;
out_free_rx_slab:
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_rx_slab);
ccid_ops->ccid_hc_rx_slab = NULL;
goto out;
}
EXPORT_SYMBOL_GPL(ccid_register);
int ccid_unregister(struct ccid *ccid)
int ccid_unregister(struct ccid_operations *ccid_ops)
{
ccids_write_lock();
ccids[ccid->ccid_id] = NULL;
ccids[ccid_ops->ccid_id] = NULL;
ccids_write_unlock();
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_tx_slab);
ccid_ops->ccid_hc_tx_slab = NULL;
ccid_kmem_cache_destroy(ccid_ops->ccid_hc_rx_slab);
ccid_ops->ccid_hc_rx_slab = NULL;
pr_info("CCID: Unregistered CCID %d (%s)\n",
ccid->ccid_id, ccid->ccid_name);
ccid_ops->ccid_id, ccid_ops->ccid_name);
return 0;
}
EXPORT_SYMBOL_GPL(ccid_unregister);
struct ccid *ccid_init(unsigned char id, struct sock *sk)
struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
{
struct ccid *ccid;
struct ccid_operations *ccid_ops;
struct ccid *ccid = NULL;
#ifdef CONFIG_KMOD
if (ccids[id] == NULL)
request_module("net-dccp-ccid-%d", id);
#endif
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;
ccid = ccids[id];
if (ccid == NULL)
goto out;
if (!try_module_get(ccid_ops->ccid_owner))
goto out_unlock;
if (!try_module_get(ccid->ccid_owner))
goto out_err;
if (ccid->ccid_init != NULL && ccid->ccid_init(sk) != 0)
goto out_module_put;
out:
ccids_read_unlock();
ccid = kmem_cache_alloc(rx ? ccid_ops->ccid_hc_rx_slab :
ccid_ops->ccid_hc_tx_slab, gfp);
if (ccid == NULL)
goto out_module_put;
ccid->ccid_ops = ccid_ops;
if (rx) {
memset(ccid + 1, 0, ccid_ops->ccid_hc_rx_obj_size);
if (ccid->ccid_ops->ccid_hc_rx_init != NULL &&
ccid->ccid_ops->ccid_hc_rx_init(ccid, sk) != 0)
goto out_free_ccid;
} else {
memset(ccid + 1, 0, ccid_ops->ccid_hc_tx_obj_size);
if (ccid->ccid_ops->ccid_hc_tx_init != NULL &&
ccid->ccid_ops->ccid_hc_tx_init(ccid, sk) != 0)
goto out_free_ccid;
}
out:
return ccid;
out_module_put:
module_put(ccid->ccid_owner);
out_err:
out_unlock:
ccids_read_unlock();
goto out;
out_free_ccid:
kmem_cache_free(rx ? ccid_ops->ccid_hc_rx_slab :
ccid_ops->ccid_hc_tx_slab, ccid);
ccid = NULL;
out_module_put:
module_put(ccid_ops->ccid_owner);
goto out;
}
EXPORT_SYMBOL_GPL(ccid_init);
EXPORT_SYMBOL_GPL(ccid_new);
void ccid_exit(struct ccid *ccid, struct sock *sk)
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;
if (ccid == NULL)
return;
ccids_read_lock();
if (ccids[ccid->ccid_id] != NULL) {
if (ccid->ccid_exit != NULL)
ccid->ccid_exit(sk);
module_put(ccid->ccid_owner);
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);
}
ccids_read_lock();
if (ccids[ccid_ops->ccid_id] != NULL)
module_put(ccid_ops->ccid_owner);
ccids_read_unlock();
}
EXPORT_SYMBOL_GPL(ccid_exit);
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);
}
EXPORT_SYMBOL_GPL(ccid_hc_tx_delete);

115
net/dccp/ccid.h
View File

@ -23,14 +23,16 @@
struct tcp_info;
struct ccid {
struct ccid_operations {
unsigned char ccid_id;
const char *ccid_name;
struct module *ccid_owner;
int (*ccid_init)(struct sock *sk);
void (*ccid_exit)(struct sock *sk);
int (*ccid_hc_rx_init)(struct sock *sk);
int (*ccid_hc_tx_init)(struct sock *sk);
kmem_cache_t *ccid_hc_rx_slab;
__u32 ccid_hc_rx_obj_size;
kmem_cache_t *ccid_hc_tx_slab;
__u32 ccid_hc_tx_obj_size;
int (*ccid_hc_rx_init)(struct ccid *ccid, struct sock *sk);
int (*ccid_hc_tx_init)(struct ccid *ccid, struct sock *sk);
void (*ccid_hc_rx_exit)(struct sock *sk);
void (*ccid_hc_tx_exit)(struct sock *sk);
void (*ccid_hc_rx_packet_recv)(struct sock *sk,
@ -67,75 +69,58 @@ struct ccid {
int __user *optlen);
};
extern int ccid_register(struct ccid *ccid);
extern int ccid_unregister(struct ccid *ccid);
extern int ccid_register(struct ccid_operations *ccid_ops);
extern int ccid_unregister(struct ccid_operations *ccid_ops);
extern struct ccid *ccid_init(unsigned char id, struct sock *sk);
extern void ccid_exit(struct ccid *ccid, struct sock *sk);
struct ccid {
struct ccid_operations *ccid_ops;
char ccid_priv[0];
};
static inline void __ccid_get(struct ccid *ccid)
static inline void *ccid_priv(const struct ccid *ccid)
{
__module_get(ccid->ccid_owner);
return (void *)ccid->ccid_priv;
}
extern struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx,
gfp_t gfp);
extern struct ccid *ccid_hc_rx_new(unsigned char id, struct sock *sk,
gfp_t gfp);
extern struct ccid *ccid_hc_tx_new(unsigned char id, struct sock *sk,
gfp_t gfp);
extern void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
extern void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);
static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb, int len)
{
int rc = 0;
if (ccid->ccid_hc_tx_send_packet != NULL)
rc = ccid->ccid_hc_tx_send_packet(sk, skb, len);
if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
rc = ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb, len);
return rc;
}
static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
int more, int len)
{
if (ccid->ccid_hc_tx_packet_sent != NULL)
ccid->ccid_hc_tx_packet_sent(sk, more, len);
}
static inline int ccid_hc_rx_init(struct ccid *ccid, struct sock *sk)
{
int rc = 0;
if (ccid->ccid_hc_rx_init != NULL)
rc = ccid->ccid_hc_rx_init(sk);
return rc;
}
static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
{
int rc = 0;
if (ccid->ccid_hc_tx_init != NULL)
rc = ccid->ccid_hc_tx_init(sk);
return rc;
}
static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
{
if (ccid != NULL && ccid->ccid_hc_rx_exit != NULL &&
dccp_sk(sk)->dccps_hc_rx_ccid_private != NULL)
ccid->ccid_hc_rx_exit(sk);
}
static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
{
if (ccid != NULL && ccid->ccid_hc_tx_exit != NULL &&
dccp_sk(sk)->dccps_hc_tx_ccid_private != NULL)
ccid->ccid_hc_tx_exit(sk);
if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, more, len);
}
static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb)
{
if (ccid->ccid_hc_rx_packet_recv != NULL)
ccid->ccid_hc_rx_packet_recv(sk, skb);
if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
}
static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb)
{
if (ccid->ccid_hc_tx_packet_recv != NULL)
ccid->ccid_hc_tx_packet_recv(sk, skb);
if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
}
static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
@ -144,8 +129,8 @@ static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
unsigned char* value)
{
int rc = 0;
if (ccid->ccid_hc_tx_parse_options != NULL)
rc = ccid->ccid_hc_tx_parse_options(sk, option, len, idx,
if (ccid->ccid_ops->ccid_hc_tx_parse_options != NULL)
rc = ccid->ccid_ops->ccid_hc_tx_parse_options(sk, option, len, idx,
value);
return rc;
}
@ -156,37 +141,37 @@ static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
unsigned char* value)
{
int rc = 0;
if (ccid->ccid_hc_rx_parse_options != NULL)
rc = ccid->ccid_hc_rx_parse_options(sk, option, len, idx, value);
if (ccid->ccid_ops->ccid_hc_rx_parse_options != NULL)
rc = ccid->ccid_ops->ccid_hc_rx_parse_options(sk, option, len, idx, value);
return rc;
}
static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb)
{
if (ccid->ccid_hc_tx_insert_options != NULL)
ccid->ccid_hc_tx_insert_options(sk, skb);
if (ccid->ccid_ops->ccid_hc_tx_insert_options != NULL)
ccid->ccid_ops->ccid_hc_tx_insert_options(sk, skb);
}
static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
struct sk_buff *skb)
{
if (ccid->ccid_hc_rx_insert_options != NULL)
ccid->ccid_hc_rx_insert_options(sk, skb);
if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
}
static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
struct tcp_info *info)
{
if (ccid->ccid_hc_rx_get_info != NULL)
ccid->ccid_hc_rx_get_info(sk, info);
if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
}
static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
struct tcp_info *info)
{
if (ccid->ccid_hc_tx_get_info != NULL)
ccid->ccid_hc_tx_get_info(sk, info);
if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
}
static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
@ -194,8 +179,8 @@ static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
u32 __user *optval, int __user *optlen)
{
int rc = -ENOPROTOOPT;
if (ccid->ccid_hc_rx_getsockopt != NULL)
rc = ccid->ccid_hc_rx_getsockopt(sk, optname, len,
if (ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
optval, optlen);
return rc;
}
@ -205,8 +190,8 @@ static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
u32 __user *optval, int __user *optlen)
{
int rc = -ENOPROTOOPT;
if (ccid->ccid_hc_tx_getsockopt != NULL)
rc = ccid->ccid_hc_tx_getsockopt(sk, optname, len,
if (ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
optval, optlen);
return rc;
}

55
net/dccp/ccids/ccid2.c
View File

@ -52,16 +52,6 @@ static int ccid2_debug;
static const int ccid2_seq_len = 128;
static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
{
return dccp_sk(sk)->dccps_hc_tx_ccid_private;
}
static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk)
{
return dccp_sk(sk)->dccps_hc_rx_ccid_private;
}
#ifdef CCID2_DEBUG
static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
{
@ -707,19 +697,12 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
ccid2_hc_tx_check_sanity(hctx);
}
static int ccid2_hc_tx_init(struct sock *sk)
static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid2_hc_tx_sock *hctx;
struct ccid2_hc_tx_sock *hctx = ccid_priv(ccid);
int seqcount = ccid2_seq_len;
int i;
dp->dccps_hc_tx_ccid_private = kzalloc(sizeof(*hctx), gfp_any());
if (dp->dccps_hc_tx_ccid_private == NULL)
return -ENOMEM;
hctx = ccid2_hc_tx_sk(sk);
/* XXX init variables with proper values */
hctx->ccid2hctx_cwnd = 1;
hctx->ccid2hctx_ssthresh = 10;
@ -728,11 +711,9 @@ static int ccid2_hc_tx_init(struct sock *sk)
/* XXX init ~ to window size... */
hctx->ccid2hctx_seqbuf = kmalloc(sizeof(*hctx->ccid2hctx_seqbuf) *
seqcount, gfp_any());
if (hctx->ccid2hctx_seqbuf == NULL) {
kfree(dp->dccps_hc_tx_ccid_private);
dp->dccps_hc_tx_ccid_private = NULL;
if (hctx->ccid2hctx_seqbuf == NULL)
return -ENOMEM;
}
for (i = 0; i < (seqcount - 1); i++) {
hctx->ccid2hctx_seqbuf[i].ccid2s_next =
&hctx->ccid2hctx_seqbuf[i + 1];
@ -763,15 +744,11 @@ static int ccid2_hc_tx_init(struct sock *sk)
static void ccid2_hc_tx_exit(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
ccid2_hc_tx_kill_rto_timer(sk);
kfree(hctx->ccid2hctx_seqbuf);
kfree(dp->dccps_hc_tx_ccid_private);
dp->dccps_hc_tx_ccid_private = NULL;
hctx->ccid2hctx_seqbuf = NULL;
}
static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
@ -791,33 +768,17 @@ static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
}
}
static int ccid2_hc_rx_init(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
dp->dccps_hc_rx_ccid_private = kzalloc(sizeof(struct ccid2_hc_rx_sock),
gfp_any());
return dp->dccps_hc_rx_ccid_private == NULL ? -ENOMEM : 0;
}
static void ccid2_hc_rx_exit(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
kfree(dp->dccps_hc_rx_ccid_private);
dp->dccps_hc_rx_ccid_private = NULL;
}
static struct ccid ccid2 = {
static struct ccid_operations ccid2 = {
.ccid_id = 2,
.ccid_name = "ccid2",
.ccid_owner = THIS_MODULE,
.ccid_hc_tx_obj_size = sizeof(struct ccid2_hc_tx_sock),
.ccid_hc_tx_init = ccid2_hc_tx_init,
.ccid_hc_tx_exit = ccid2_hc_tx_exit,
.ccid_hc_tx_send_packet = ccid2_hc_tx_send_packet,
.ccid_hc_tx_packet_sent = ccid2_hc_tx_packet_sent,
.ccid_hc_tx_packet_recv = ccid2_hc_tx_packet_recv,
.ccid_hc_rx_init = ccid2_hc_rx_init,
.ccid_hc_rx_exit = ccid2_hc_rx_exit,
.ccid_hc_rx_obj_size = sizeof(struct ccid2_hc_rx_sock),
.ccid_hc_rx_packet_recv = ccid2_hc_rx_packet_recv,
};

16
net/dccp/ccids/ccid2.h
View File

@ -20,6 +20,13 @@
#ifndef _DCCP_CCID2_H_
#define _DCCP_CCID2_H_
#include <linux/dccp.h>
#include <linux/timer.h>
#include <linux/types.h>
#include "../ccid.h"
struct sock;
struct ccid2_seq {
u64 ccid2s_seq;
unsigned long ccid2s_sent;
@ -66,4 +73,13 @@ struct ccid2_hc_rx_sock {
int ccid2hcrx_data;
};
static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
{
return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
}
static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk)
{
return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
}
#endif /* _DCCP_CCID2_H_ */

34
net/dccp/ccids/ccid3.c
View File

@ -647,17 +647,10 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
return rc;
}
static int ccid3_hc_tx_init(struct sock *sk)
static int ccid3_hc_tx_init(struct ccid *ccid, struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid3_hc_tx_sock *hctx;
dp->dccps_hc_tx_ccid_private = kmalloc(sizeof(*hctx), gfp_any());
if (dp->dccps_hc_tx_ccid_private == NULL)
return -ENOMEM;
hctx = ccid3_hc_tx_sk(sk);
memset(hctx, 0, sizeof(*hctx));
struct ccid3_hc_tx_sock *hctx = ccid_priv(ccid);
if (dp->dccps_packet_size >= TFRC_MIN_PACKET_SIZE &&
dp->dccps_packet_size <= TFRC_MAX_PACKET_SIZE)
@ -680,7 +673,6 @@ static int ccid3_hc_tx_init(struct sock *sk)
static void ccid3_hc_tx_exit(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
BUG_ON(hctx == NULL);
@ -690,9 +682,6 @@ static void ccid3_hc_tx_exit(struct sock *sk)
/* Empty packet history */
dccp_tx_hist_purge(ccid3_tx_hist, &hctx->ccid3hctx_hist);
kfree(dp->dccps_hc_tx_ccid_private);
dp->dccps_hc_tx_ccid_private = NULL;
}
/*
@ -1039,20 +1028,13 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
}
}
static int ccid3_hc_rx_init(struct sock *sk)
static int ccid3_hc_rx_init(struct ccid *ccid, struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
struct ccid3_hc_rx_sock *hcrx;
struct ccid3_hc_rx_sock *hcrx = ccid_priv(ccid);
ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
dp->dccps_hc_rx_ccid_private = kmalloc(sizeof(*hcrx), gfp_any());
if (dp->dccps_hc_rx_ccid_private == NULL)
return -ENOMEM;
hcrx = ccid3_hc_rx_sk(sk);
memset(hcrx, 0, sizeof(*hcrx));
if (dp->dccps_packet_size >= TFRC_MIN_PACKET_SIZE &&
dp->dccps_packet_size <= TFRC_MAX_PACKET_SIZE)
hcrx->ccid3hcrx_s = dp->dccps_packet_size;
@ -1071,7 +1053,6 @@ static int ccid3_hc_rx_init(struct sock *sk)
static void ccid3_hc_rx_exit(struct sock *sk)
{
struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
BUG_ON(hcrx == NULL);
@ -1082,9 +1063,6 @@ static void ccid3_hc_rx_exit(struct sock *sk)
/* Empty loss interval history */
dccp_li_hist_purge(ccid3_li_hist, &hcrx->ccid3hcrx_li_hist);
kfree(dp->dccps_hc_rx_ccid_private);
dp->dccps_hc_rx_ccid_private = NULL;
}
static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
@ -1170,10 +1148,11 @@ static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
return 0;
}
static struct ccid ccid3 = {
static struct ccid_operations ccid3 = {
.ccid_id = 3,
.ccid_name = "ccid3",
.ccid_owner = THIS_MODULE,
.ccid_hc_tx_obj_size = sizeof(struct ccid3_hc_tx_sock),
.ccid_hc_tx_init = ccid3_hc_tx_init,
.ccid_hc_tx_exit = ccid3_hc_tx_exit,
.ccid_hc_tx_send_packet = ccid3_hc_tx_send_packet,
@ -1181,6 +1160,7 @@ static struct ccid ccid3 = {
.ccid_hc_tx_packet_recv = ccid3_hc_tx_packet_recv,
.ccid_hc_tx_insert_options = ccid3_hc_tx_insert_options,
.ccid_hc_tx_parse_options = ccid3_hc_tx_parse_options,
.ccid_hc_rx_obj_size = sizeof(struct ccid3_hc_rx_sock),
.ccid_hc_rx_init = ccid3_hc_rx_init,
.ccid_hc_rx_exit = ccid3_hc_rx_exit,
.ccid_hc_rx_insert_options = ccid3_hc_rx_insert_options,

5
net/dccp/ccids/ccid3.h
View File

@ -41,6 +41,7 @@
#include <linux/time.h>
#include <linux/types.h>
#include <linux/tfrc.h>
#include "../ccid.h"
#define TFRC_MIN_PACKET_SIZE 16
#define TFRC_STD_PACKET_SIZE 256
@ -135,12 +136,12 @@ struct ccid3_hc_rx_sock {
static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
{
return dccp_sk(sk)->dccps_hc_tx_ccid_private;
return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
}
static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk)
{
return dccp_sk(sk)->dccps_hc_rx_ccid_private;
return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
}
#endif /* _DCCP_CCID3_H_ */

8
net/dccp/input.c
View File

@ -324,14 +324,6 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
dccp_set_seqno(&dp->dccps_swl,
max48(dp->dccps_swl, dp->dccps_isr));
if (ccid_hc_rx_init(dp->dccps_hc_rx_ccid, sk) != 0 ||
ccid_hc_tx_init(dp->dccps_hc_tx_ccid, sk) != 0) {
ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
/* FIXME: send appropriate RESET code */
goto out_invalid_packet;
}
dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
/*

24
net/dccp/ipv4.c
View File

@ -1058,14 +1058,16 @@ int dccp_v4_init_sock(struct sock *sk)
if (dp->dccps_hc_rx_ackvec == NULL)
return -ENOMEM;
}
dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_rx_ccid,
sk);
dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_tx_ccid,
sk);
if (dp->dccps_hc_rx_ccid == NULL ||
dp->dccps_hc_tx_ccid == NULL) {
ccid_exit(dp->dccps_hc_rx_ccid, sk);
ccid_exit(dp->dccps_hc_tx_ccid, sk);
dp->dccps_hc_rx_ccid =
ccid_hc_rx_new(dp->dccps_options.dccpo_rx_ccid,
sk, GFP_KERNEL);
dp->dccps_hc_tx_ccid =
ccid_hc_tx_new(dp->dccps_options.dccpo_tx_ccid,
sk, GFP_KERNEL);
if (unlikely(dp->dccps_hc_rx_ccid == NULL ||
dp->dccps_hc_tx_ccid == NULL)) {
ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
if (dp->dccps_options.dccpo_send_ack_vector) {
dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
dp->dccps_hc_rx_ackvec = NULL;
@ -1120,14 +1122,12 @@ int dccp_v4_destroy_sock(struct sock *sk)
kfree(dp->dccps_service_list);
dp->dccps_service_list = NULL;
ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
if (dp->dccps_options.dccpo_send_ack_vector) {
dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
dp->dccps_hc_rx_ackvec = NULL;
}
ccid_exit(dp->dccps_hc_rx_ccid, sk);
ccid_exit(dp->dccps_hc_tx_ccid, sk);
ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
/* clean up feature negotiation state */

25
net/dccp/minisocks.c
View File

@ -121,23 +121,21 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
if (newdp->dccps_options.dccpo_send_ack_vector) {
newdp->dccps_hc_rx_ackvec =
dccp_ackvec_alloc(GFP_ATOMIC);
/*
* XXX: We're using the same CCIDs set on the parent,
* i.e. sk_clone copied the master sock and left the
* CCID pointers for this child, that is why we do the
* __ccid_get calls.
*/
if (unlikely(newdp->dccps_hc_rx_ackvec == NULL))
goto out_free;
}
if (unlikely(ccid_hc_rx_init(newdp->dccps_hc_rx_ccid,
newsk) != 0 ||
ccid_hc_tx_init(newdp->dccps_hc_tx_ccid,
newsk) != 0)) {
newdp->dccps_hc_rx_ccid =
ccid_hc_rx_new(newdp->dccps_options.dccpo_rx_ccid,
newsk, GFP_ATOMIC);
newdp->dccps_hc_tx_ccid =
ccid_hc_tx_new(newdp->dccps_options.dccpo_tx_ccid,
newsk, GFP_ATOMIC);
if (unlikely(newdp->dccps_hc_rx_ccid == NULL ||
newdp->dccps_hc_tx_ccid == NULL)) {
dccp_ackvec_free(newdp->dccps_hc_rx_ackvec);
ccid_hc_rx_exit(newdp->dccps_hc_rx_ccid, newsk);
ccid_hc_tx_exit(newdp->dccps_hc_tx_ccid, newsk);
ccid_hc_rx_delete(newdp->dccps_hc_rx_ccid, newsk);
ccid_hc_tx_delete(newdp->dccps_hc_tx_ccid, newsk);
out_free:
/* It is still raw copy of parent, so invalidate
* destructor and make plain sk_free() */
@ -146,9 +144,6 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
return NULL;
}
__ccid_get(newdp->dccps_hc_rx_ccid);
__ccid_get(newdp->dccps_hc_tx_ccid);
/*
* Step 3: Process LISTEN state
*