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[DCCP]: Introduce the DCCP Kernel hacking menu

Browse source 
Only available if CONFIG_DEBUG_KERNEL is enabled in the "Kernel
Hacking" Menu.

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 2005-08-13 20:35:39 -03:00 committed by David S. Miller
parent 531669a0a9
commit 725ba8eee3
5 changed files with 56 additions and 21 deletions
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21
net/dccp/Kconfig
View file

@ -26,4 +26,25 @@ config INET_DCCP_DIAG
source "net/dccp/ccids/Kconfig"
menu "DCCP Kernel Hacking"
depends on IP_DCCP=m && DEBUG_KERNEL=y
config IP_DCCP_DEBUG
bool "DCCP debug messages"
---help---
Only use this if you're hacking DCCP.
Just say N.
config IP_DCCP_UNLOAD_HACK
depends on IP_DCCP_CCID3=m
bool "DCCP control sock unload hack"
---help---
Enable this to be able to unload the dccp module when the it
has only one refcount held, the control sock one. Just execute
"rmmod dccp_ccid3 dccp"
Just say N.
endmenu
endmenu

9
net/dccp/ccids/ccid3.c
View file

@ -2078,6 +2078,15 @@ module_init(ccid3_module_init);
static __exit void ccid3_module_exit(void)
{
#ifdef CONFIG_IP_DCCP_UNLOAD_HACK
/*
* Hack to use while developing, so that we get rid of the control
* sock, that is what keeps a refcount on dccp.ko -acme
*/
extern void dccp_ctl_sock_exit(void);
dccp_ctl_sock_exit();
#endif
ccid_unregister(&ccid3);
if (ccid3_tx_hist != NULL) {

7
net/dccp/dccp.h
View file

@ -11,14 +11,13 @@
* published by the Free Software Foundation.
*/
#include <linux/config.h>
#include <linux/dccp.h>
#include <net/snmp.h>
#include <net/sock.h>
#include <net/tcp.h>
#define DCCP_DEBUG
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
extern int dccp_debug;
#define dccp_pr_debug(format, a...) \
@ -426,7 +425,7 @@ extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state);
extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
struct sock *sk, u64 ackno);
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
extern void dccp_ackvector_print(const u64 ackno,
const unsigned char *vector, int len);
extern void dccp_ackpkts_print(const struct dccp_ackpkts *ap);

18
net/dccp/options.c
View file

@ -58,7 +58,7 @@ static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len)
int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT rx opt: " : "server rx opt: ";
#endif
@ -303,7 +303,7 @@ void dccp_insert_option_elapsed_time(struct sock *sk,
struct sk_buff *skb,
u32 elapsed_time)
{
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
struct dccp_sock *dp = dccp_sk(sk);
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT TX opt: " : "server TX opt: ";
@ -341,7 +341,7 @@ EXPORT_SYMBOL(dccp_insert_option_elapsed_time);
static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT TX opt: " : "server TX opt: ";
#endif
@ -425,7 +425,7 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
struct sk_buff *skb)
{
struct dccp_sock *dp = dccp_sk(sk);
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT TX opt: " : "server TX opt: ";
#endif
@ -504,7 +504,7 @@ struct dccp_ackpkts *dccp_ackpkts_alloc(unsigned int len, int priority)
struct dccp_ackpkts *ap = kmalloc(sizeof(*ap) + len, priority);
if (ap != NULL) {
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
memset(ap->dccpap_buf, 0xFF, len);
#endif
ap->dccpap_buf_len = len;
@ -526,7 +526,7 @@ struct dccp_ackpkts *dccp_ackpkts_alloc(unsigned int len, int priority)
void dccp_ackpkts_free(struct dccp_ackpkts *ap)
{
if (ap != NULL) {
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
memset(ap, 0xFF, sizeof(*ap) + ap->dccpap_buf_len);
#endif
kfree(ap);
@ -680,7 +680,7 @@ int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
return -EILSEQ;
}
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
void dccp_ackvector_print(const u64 ackno, const unsigned char *vector,
int len)
{
@ -735,7 +735,7 @@ void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap, struct sock *sk,
return;
if (ackno == ap->dccpap_ack_seqno) {
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
struct dccp_sock *dp = dccp_sk(sk);
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT rx ack: " : "server rx ack: ";
@ -794,7 +794,7 @@ static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
/* dccp_pr_debug_cat("yes\n"); */
if (state != DCCP_ACKPKTS_STATE_NOT_RECEIVED) {
#ifdef DCCP_DEBUG
#ifdef CONFIG_IP_DCCP_DEBUG
struct dccp_sock *dp = dccp_sk(sk);
const char *debug_prefix =
dp->dccps_role == DCCP_ROLE_CLIENT ?

22
net/dccp/proto.c
View file

@ -503,12 +503,16 @@ static int __init dccp_ctl_sock_init(void)
return rc;
}
static void __exit dccp_ctl_sock_exit(void)
#ifdef CONFIG_IP_DCCP_UNLOAD_HACK
void dccp_ctl_sock_exit(void)
{
if (dccp_ctl_socket != NULL)
sock_release(dccp_ctl_socket);
}
EXPORT_SYMBOL_GPL(dccp_ctl_sock_exit);
#endif
static int __init init_dccp_v4_mibs(void)
{
int rc = -ENOMEM;
@ -655,19 +659,21 @@ static const char dccp_del_proto_err_msg[] __exitdata =
static void __exit dccp_fini(void)
{
dccp_ctl_sock_exit();
inet_unregister_protosw(&dccp_v4_protosw);
if (inet_del_protocol(&dccp_protocol, IPPROTO_DCCP) < 0)
printk(dccp_del_proto_err_msg);
/* Free the control endpoint. */
sock_release(dccp_ctl_socket);
proto_unregister(&dccp_v4_prot);
free_percpu(dccp_statistics[0]);
free_percpu(dccp_statistics[1]);
free_pages((unsigned long)dccp_hashinfo.bhash,
get_order(dccp_hashinfo.bhash_size *
sizeof(struct inet_bind_hashbucket)));
free_pages((unsigned long)dccp_hashinfo.ehash,
get_order(dccp_hashinfo.ehash_size *
sizeof(struct inet_ehash_bucket)));
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
proto_unregister(&dccp_v4_prot);
}
module_init(dccp_init);