/*
* ip_vs_app.c: Application module support for IPVS
*
- * Version: $Id: ip_vs_app.c,v 1.17 2003/03/22 06:31:21 wensong Exp $
- *
* Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
*
* This program is free software; you can redistribute it and/or
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/ip.h>
+#include <linux/netfilter.h>
+#include <net/net_namespace.h>
#include <net/protocol.h>
+#include <net/tcp.h>
#include <asm/system.h>
#include <linux/stat.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/mutex.h>
#include <net/ip_vs.h>
/* ipvs application list head */
static LIST_HEAD(ip_vs_app_list);
-static DECLARE_MUTEX(__ip_vs_app_mutex);
+static DEFINE_MUTEX(__ip_vs_app_mutex);
/*
*/
static inline int ip_vs_app_get(struct ip_vs_app *app)
{
- /* test and get the module atomically */
- if (app->module)
- return try_module_get(app->module);
- else
- return 1;
+ return try_module_get(app->module);
}
static inline void ip_vs_app_put(struct ip_vs_app *app)
{
- if (app->module)
- module_put(app->module);
+ module_put(app->module);
}
if (!pp->unregister_app)
return -EOPNOTSUPP;
- inc = kmalloc(sizeof(struct ip_vs_app), GFP_KERNEL);
+ inc = kmemdup(app, sizeof(*inc), GFP_KERNEL);
if (!inc)
return -ENOMEM;
- memcpy(inc, app, sizeof(*inc));
INIT_LIST_HEAD(&inc->p_list);
INIT_LIST_HEAD(&inc->incs_list);
inc->app = app;
return 0;
out:
- if (inc->timeout_table)
- kfree(inc->timeout_table);
+ kfree(inc->timeout_table);
kfree(inc);
return ret;
}
list_del(&inc->a_list);
- if (inc->timeout_table != NULL)
- kfree(inc->timeout_table);
+ kfree(inc->timeout_table);
kfree(inc);
}
{
int result;
- down(&__ip_vs_app_mutex);
+ mutex_lock(&__ip_vs_app_mutex);
result = ip_vs_app_inc_new(app, proto, port);
- up(&__ip_vs_app_mutex);
+ mutex_unlock(&__ip_vs_app_mutex);
return result;
}
/* increase the module use count */
ip_vs_use_count_inc();
- down(&__ip_vs_app_mutex);
+ mutex_lock(&__ip_vs_app_mutex);
list_add(&app->a_list, &ip_vs_app_list);
- up(&__ip_vs_app_mutex);
+ mutex_unlock(&__ip_vs_app_mutex);
return 0;
}
{
struct ip_vs_app *inc, *nxt;
- down(&__ip_vs_app_mutex);
+ mutex_lock(&__ip_vs_app_mutex);
list_for_each_entry_safe(inc, nxt, &app->incs_list, a_list) {
ip_vs_app_inc_release(inc);
list_del(&app->a_list);
- up(&__ip_vs_app_mutex);
+ mutex_unlock(&__ip_vs_app_mutex);
/* decrease the module use count */
ip_vs_use_count_dec();
}
-#if 0000
-/*
- * Get reference to app by name (called from user context)
- */
-struct ip_vs_app *ip_vs_app_get_by_name(char *appname)
-{
- struct ip_vs_app *app, *a = NULL;
-
- down(&__ip_vs_app_mutex);
-
- list_for_each_entry(ent, &ip_vs_app_list, a_list) {
- if (strcmp(app->name, appname))
- continue;
-
- /* softirq may call ip_vs_app_get too, so the caller
- must disable softirq on the current CPU */
- if (ip_vs_app_get(app))
- a = app;
- break;
- }
-
- up(&__ip_vs_app_mutex);
-
- return a;
-}
-#endif
-
-
/*
* Bind ip_vs_conn to its ip_vs_app (called by cp constructor)
*/
spin_unlock(&cp->lock);
}
-static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff **pskb,
+static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb,
struct ip_vs_app *app)
{
int diff;
- unsigned int tcp_offset = (*pskb)->nh.iph->ihl*4;
+ const unsigned int tcp_offset = ip_hdrlen(skb);
struct tcphdr *th;
__u32 seq;
- if (!ip_vs_make_skb_writable(pskb, tcp_offset + sizeof(*th)))
+ if (!skb_make_writable(skb, tcp_offset + sizeof(*th)))
return 0;
- th = (struct tcphdr *)((*pskb)->nh.raw + tcp_offset);
+ th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset);
/*
* Remember seq number in case this pkt gets resized
if (app->pkt_out == NULL)
return 1;
- if (!app->pkt_out(app, cp, pskb, &diff))
+ if (!app->pkt_out(app, cp, skb, &diff))
return 0;
/*
* called by ipvs packet handler, assumes previously checked cp!=NULL
* returns false if it can't handle packet (oom)
*/
-int ip_vs_app_pkt_out(struct ip_vs_conn *cp, struct sk_buff **pskb)
+int ip_vs_app_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb)
{
struct ip_vs_app *app;
/* TCP is complicated */
if (cp->protocol == IPPROTO_TCP)
- return app_tcp_pkt_out(cp, pskb, app);
+ return app_tcp_pkt_out(cp, skb, app);
/*
* Call private output hook function
if (app->pkt_out == NULL)
return 1;
- return app->pkt_out(app, cp, pskb, NULL);
+ return app->pkt_out(app, cp, skb, NULL);
}
-static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff **pskb,
+static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb,
struct ip_vs_app *app)
{
int diff;
- unsigned int tcp_offset = (*pskb)->nh.iph->ihl*4;
+ const unsigned int tcp_offset = ip_hdrlen(skb);
struct tcphdr *th;
__u32 seq;
- if (!ip_vs_make_skb_writable(pskb, tcp_offset + sizeof(*th)))
+ if (!skb_make_writable(skb, tcp_offset + sizeof(*th)))
return 0;
- th = (struct tcphdr *)((*pskb)->nh.raw + tcp_offset);
+ th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset);
/*
* Remember seq number in case this pkt gets resized
if (app->pkt_in == NULL)
return 1;
- if (!app->pkt_in(app, cp, pskb, &diff))
+ if (!app->pkt_in(app, cp, skb, &diff))
return 0;
/*
* called by ipvs packet handler, assumes previously checked cp!=NULL.
* returns false if can't handle packet (oom).
*/
-int ip_vs_app_pkt_in(struct ip_vs_conn *cp, struct sk_buff **pskb)
+int ip_vs_app_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb)
{
struct ip_vs_app *app;
/* TCP is complicated */
if (cp->protocol == IPPROTO_TCP)
- return app_tcp_pkt_in(cp, pskb, app);
+ return app_tcp_pkt_in(cp, skb, app);
/*
* Call private input hook function
if (app->pkt_in == NULL)
return 1;
- return app->pkt_in(app, cp, pskb, NULL);
+ return app->pkt_in(app, cp, skb, NULL);
}
static void *ip_vs_app_seq_start(struct seq_file *seq, loff_t *pos)
{
- down(&__ip_vs_app_mutex);
+ mutex_lock(&__ip_vs_app_mutex);
return *pos ? ip_vs_app_idx(*pos - 1) : SEQ_START_TOKEN;
}
static void ip_vs_app_seq_stop(struct seq_file *seq, void *v)
{
- up(&__ip_vs_app_mutex);
+ mutex_unlock(&__ip_vs_app_mutex);
}
static int ip_vs_app_seq_show(struct seq_file *seq, void *v)
return 0;
}
-static struct seq_operations ip_vs_app_seq_ops = {
+static const struct seq_operations ip_vs_app_seq_ops = {
.start = ip_vs_app_seq_start,
.next = ip_vs_app_seq_next,
.stop = ip_vs_app_seq_stop,
return seq_open(file, &ip_vs_app_seq_ops);
}
-static struct file_operations ip_vs_app_fops = {
+static const struct file_operations ip_vs_app_fops = {
.owner = THIS_MODULE,
.open = ip_vs_app_open,
.read = seq_read,
/*
* Replace a segment of data with a new segment
*/
-int ip_vs_skb_replace(struct sk_buff *skb, int pri,
+int ip_vs_skb_replace(struct sk_buff *skb, gfp_t pri,
char *o_buf, int o_len, char *n_buf, int n_len)
{
- struct iphdr *iph;
int diff;
int o_offset;
int o_left;
skb_put(skb, diff);
memmove(skb->data + o_offset + n_len,
skb->data + o_offset + o_len, o_left);
- memcpy(skb->data + o_offset, n_buf, n_len);
+ skb_copy_to_linear_data_offset(skb, o_offset, n_buf, n_len);
}
/* must update the iph total length here */
- iph = skb->nh.iph;
- iph->tot_len = htons(skb->len);
+ ip_hdr(skb)->tot_len = htons(skb->len);
LeaveFunction(9);
return 0;
}
-int ip_vs_app_init(void)
+int __init ip_vs_app_init(void)
{
/* we will replace it with proc_net_ipvs_create() soon */
- proc_net_fops_create("ip_vs_app", 0, &ip_vs_app_fops);
+ proc_net_fops_create(&init_net, "ip_vs_app", 0, &ip_vs_app_fops);
return 0;
}
void ip_vs_app_cleanup(void)
{
- proc_net_remove("ip_vs_app");
+ proc_net_remove(&init_net, "ip_vs_app");
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff