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IPVS: Add persistence engine to connection entry 

The dest of a connection may not exist if it has been created as the result
of connection synchronisation. But in order for connection entries for
templates with persistence engine data created through connection
synchronisation to be valid access to the persistence engine pointer is
required.  So add the persistence engine to the connection itself.

Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Simon Horman 2010-11-08 20:05:57 +09:00
parent c5d277d29a
commit e9e5eee873
4 changed files with 30 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/net/ip_vs.h
View File

@ -422,6 +422,7 @@ struct ip_vs_conn {
struct ip_vs_seq in_seq; /* incoming seq. struct */
struct ip_vs_seq out_seq; /* outgoing seq. struct */
const struct ip_vs_pe *pe;
char *pe_data;
__u8 pe_data_len;
};
@ -814,8 +815,19 @@ void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe);
void ip_vs_unbind_pe(struct ip_vs_service *svc);
int register_ip_vs_pe(struct ip_vs_pe *pe);
int unregister_ip_vs_pe(struct ip_vs_pe *pe);
extern struct ip_vs_pe *ip_vs_pe_get(const char *name);
extern void ip_vs_pe_put(struct ip_vs_pe *pe);
struct ip_vs_pe *ip_vs_pe_getbyname(const char *name);
static inline void ip_vs_pe_get(const struct ip_vs_pe *pe)
{
if (pe && pe->module)
__module_get(pe->module);
}
static inline void ip_vs_pe_put(const struct ip_vs_pe *pe)
{
if (pe && pe->module)
module_put(pe->module);
}
/*
* IPVS protocol functions (from ip_vs_proto.c)

19
net/netfilter/ipvs/ip_vs_conn.c
View File

@ -176,8 +176,8 @@ static unsigned int ip_vs_conn_hashkey_conn(const struct ip_vs_conn *cp)
ip_vs_conn_fill_param(cp->af, cp->protocol, &cp->caddr, cp->cport,
NULL, 0, &p);
if (cp->dest && cp->dest->svc->pe) {
p.pe = cp->dest->svc->pe;
if (cp->pe) {
p.pe = cp->pe;
p.pe_data = cp->pe_data;
p.pe_data_len = cp->pe_data_len;
}
@ -765,6 +765,7 @@ static void ip_vs_conn_expire(unsigned long data)
if (cp->flags & IP_VS_CONN_F_NFCT)
ip_vs_conn_drop_conntrack(cp);
ip_vs_pe_put(cp->pe);
kfree(cp->pe_data);
if (unlikely(cp->app != NULL))
ip_vs_unbind_app(cp);
@ -826,7 +827,9 @@ ip_vs_conn_new(const struct ip_vs_conn_param *p,
&cp->daddr, daddr);
cp->dport = dport;
cp->flags = flags;
if (flags & IP_VS_CONN_F_TEMPLATE && p->pe_data) {
if (flags & IP_VS_CONN_F_TEMPLATE && p->pe) {
ip_vs_pe_get(p->pe);
cp->pe = p->pe;
cp->pe_data = p->pe_data;
cp->pe_data_len = p->pe_data_len;
}
@ -958,15 +961,13 @@ static int ip_vs_conn_seq_show(struct seq_file *seq, void *v)
char pe_data[IP_VS_PENAME_MAXLEN + IP_VS_PEDATA_MAXLEN + 3];
size_t len = 0;
if (cp->dest && cp->pe_data &&
cp->dest->svc->pe->show_pe_data) {
if (cp->pe_data) {
pe_data[0] = ' ';
len = strlen(cp->dest->svc->pe->name);
memcpy(pe_data + 1, cp->dest->svc->pe->name, len);
len = strlen(cp->pe->name);
memcpy(pe_data + 1, cp->pe->name, len);
pe_data[len + 1] = ' ';
len += 2;
len += cp->dest->svc->pe->show_pe_data(cp,
pe_data + len);
len += cp->pe->show_pe_data(cp, pe_data + len);
}
pe_data[len] = '\0';

4
net/netfilter/ipvs/ip_vs_ctl.c
View File

@ -1139,7 +1139,7 @@ ip_vs_add_service(struct ip_vs_service_user_kern *u,
}
if (u->pe_name && *u->pe_name) {
pe = ip_vs_pe_get(u->pe_name);
pe = ip_vs_pe_getbyname(u->pe_name);
if (pe == NULL) {
pr_info("persistence engine module ip_vs_pe_%s "
"not found\n", u->pe_name);
@ -1250,7 +1250,7 @@ ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
old_sched = sched;
if (u->pe_name && *u->pe_name) {
pe = ip_vs_pe_get(u->pe_name);
pe = ip_vs_pe_getbyname(u->pe_name);
if (pe == NULL) {
pr_info("persistence engine module ip_vs_pe_%s "
"not found\n", u->pe_name);

14
net/netfilter/ipvs/ip_vs_pe.c
View File

@ -30,7 +30,7 @@ void ip_vs_unbind_pe(struct ip_vs_service *svc)
/* Get pe in the pe list by name */
static struct ip_vs_pe *
ip_vs_pe_getbyname(const char *pe_name)
__ip_vs_pe_getbyname(const char *pe_name)
{
struct ip_vs_pe *pe;
@ -60,28 +60,22 @@ ip_vs_pe_getbyname(const char *pe_name)
}
/* Lookup pe and try to load it if it doesn't exist */
struct ip_vs_pe *ip_vs_pe_get(const char *name)
struct ip_vs_pe *ip_vs_pe_getbyname(const char *name)
{
struct ip_vs_pe *pe;
/* Search for the pe by name */
pe = ip_vs_pe_getbyname(name);
pe = __ip_vs_pe_getbyname(name);
/* If pe not found, load the module and search again */
if (!pe) {
request_module("ip_vs_pe_%s", name);
pe = ip_vs_pe_getbyname(name);
pe = __ip_vs_pe_getbyname(name);
}
return pe;
}
void ip_vs_pe_put(struct ip_vs_pe *pe)
{
if (pe && pe->module)
module_put(pe->module);
}
/* Register a pe in the pe list */
int register_ip_vs_pe(struct ip_vs_pe *pe)
{