1 files changed, 0 insertions, 622 deletions

diff --git a/net/ipv4/ipvs/ip_vs_app.c b/net/ipv4/ipvs/ip_vs_app.c
deleted file mode 100644
index 201b8ea3020d..000000000000
--- a/net/ipv4/ipvs/ip_vs_app.c
+++ /dev/null
@@ -1,622 +0,0 @@
-/*
- * ip_vs_app.c: Application module support for IPVS
- *
- * Authors:     Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- *              This program is free software; you can redistribute it and/or
- *              modify it under the terms of the GNU General Public License
- *              as published by the Free Software Foundation; either version
- *              2 of the License, or (at your option) any later version.
- *
- * Most code here is taken from ip_masq_app.c in kernel 2.2. The difference
- * is that ip_vs_app module handles the reverse direction (incoming requests
- * and outgoing responses).
- *
- *		IP_MASQ_APP application masquerading module
- *
- * Author:	Juan Jose Ciarlante, <jjciarla@raiz.uncu.edu.ar>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#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>
-
-EXPORT_SYMBOL(register_ip_vs_app);
-EXPORT_SYMBOL(unregister_ip_vs_app);
-EXPORT_SYMBOL(register_ip_vs_app_inc);
-
-/* ipvs application list head */
-static LIST_HEAD(ip_vs_app_list);
-static DEFINE_MUTEX(__ip_vs_app_mutex);
-
-
-/*
- *	Get an ip_vs_app object
- */
-static inline int ip_vs_app_get(struct ip_vs_app *app)
-{
-	return try_module_get(app->module);
-}
-
-
-static inline void ip_vs_app_put(struct ip_vs_app *app)
-{
-	module_put(app->module);
-}
-
-
-/*
- *	Allocate/initialize app incarnation and register it in proto apps.
- */
-static int
-ip_vs_app_inc_new(struct ip_vs_app *app, __u16 proto, __u16 port)
-{
-	struct ip_vs_protocol *pp;
-	struct ip_vs_app *inc;
-	int ret;
-
-	if (!(pp = ip_vs_proto_get(proto)))
-		return -EPROTONOSUPPORT;
-
-	if (!pp->unregister_app)
-		return -EOPNOTSUPP;
-
-	inc = kmemdup(app, sizeof(*inc), GFP_KERNEL);
-	if (!inc)
-		return -ENOMEM;
-	INIT_LIST_HEAD(&inc->p_list);
-	INIT_LIST_HEAD(&inc->incs_list);
-	inc->app = app;
-	inc->port = htons(port);
-	atomic_set(&inc->usecnt, 0);
-
-	if (app->timeouts) {
-		inc->timeout_table =
-			ip_vs_create_timeout_table(app->timeouts,
-						   app->timeouts_size);
-		if (!inc->timeout_table) {
-			ret = -ENOMEM;
-			goto out;
-		}
-	}
-
-	ret = pp->register_app(inc);
-	if (ret)
-		goto out;
-
-	list_add(&inc->a_list, &app->incs_list);
-	IP_VS_DBG(9, "%s application %s:%u registered\n",
-		  pp->name, inc->name, inc->port);
-
-	return 0;
-
-  out:
-	kfree(inc->timeout_table);
-	kfree(inc);
-	return ret;
-}
-
-
-/*
- *	Release app incarnation
- */
-static void
-ip_vs_app_inc_release(struct ip_vs_app *inc)
-{
-	struct ip_vs_protocol *pp;
-
-	if (!(pp = ip_vs_proto_get(inc->protocol)))
-		return;
-
-	if (pp->unregister_app)
-		pp->unregister_app(inc);
-
-	IP_VS_DBG(9, "%s App %s:%u unregistered\n",
-		  pp->name, inc->name, inc->port);
-
-	list_del(&inc->a_list);
-
-	kfree(inc->timeout_table);
-	kfree(inc);
-}
-
-
-/*
- *	Get reference to app inc (only called from softirq)
- *
- */
-int ip_vs_app_inc_get(struct ip_vs_app *inc)
-{
-	int result;
-
-	atomic_inc(&inc->usecnt);
-	if (unlikely((result = ip_vs_app_get(inc->app)) != 1))
-		atomic_dec(&inc->usecnt);
-	return result;
-}
-
-
-/*
- *	Put the app inc (only called from timer or net softirq)
- */
-void ip_vs_app_inc_put(struct ip_vs_app *inc)
-{
-	ip_vs_app_put(inc->app);
-	atomic_dec(&inc->usecnt);
-}
-
-
-/*
- *	Register an application incarnation in protocol applications
- */
-int
-register_ip_vs_app_inc(struct ip_vs_app *app, __u16 proto, __u16 port)
-{
-	int result;
-
-	mutex_lock(&__ip_vs_app_mutex);
-
-	result = ip_vs_app_inc_new(app, proto, port);
-
-	mutex_unlock(&__ip_vs_app_mutex);
-
-	return result;
-}
-
-
-/*
- *	ip_vs_app registration routine
- */
-int register_ip_vs_app(struct ip_vs_app *app)
-{
-	/* increase the module use count */
-	ip_vs_use_count_inc();
-
-	mutex_lock(&__ip_vs_app_mutex);
-
-	list_add(&app->a_list, &ip_vs_app_list);
-
-	mutex_unlock(&__ip_vs_app_mutex);
-
-	return 0;
-}
-
-
-/*
- *	ip_vs_app unregistration routine
- *	We are sure there are no app incarnations attached to services
- */
-void unregister_ip_vs_app(struct ip_vs_app *app)
-{
-	struct ip_vs_app *inc, *nxt;
-
-	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);
-
-	mutex_unlock(&__ip_vs_app_mutex);
-
-	/* decrease the module use count */
-	ip_vs_use_count_dec();
-}
-
-
-/*
- *	Bind ip_vs_conn to its ip_vs_app (called by cp constructor)
- */
-int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp)
-{
-	return pp->app_conn_bind(cp);
-}
-
-
-/*
- *	Unbind cp from application incarnation (called by cp destructor)
- */
-void ip_vs_unbind_app(struct ip_vs_conn *cp)
-{
-	struct ip_vs_app *inc = cp->app;
-
-	if (!inc)
-		return;
-
-	if (inc->unbind_conn)
-		inc->unbind_conn(inc, cp);
-	if (inc->done_conn)
-		inc->done_conn(inc, cp);
-	ip_vs_app_inc_put(inc);
-	cp->app = NULL;
-}
-
-
-/*
- *	Fixes th->seq based on ip_vs_seq info.
- */
-static inline void vs_fix_seq(const struct ip_vs_seq *vseq, struct tcphdr *th)
-{
-	__u32 seq = ntohl(th->seq);
-
-	/*
-	 *	Adjust seq with delta-offset for all packets after
-	 *	the most recent resized pkt seq and with previous_delta offset
-	 *	for all packets	before most recent resized pkt seq.
-	 */
-	if (vseq->delta || vseq->previous_delta) {
-		if(after(seq, vseq->init_seq)) {
-			th->seq = htonl(seq + vseq->delta);
-			IP_VS_DBG(9, "vs_fix_seq(): added delta (%d) to seq\n",
-				  vseq->delta);
-		} else {
-			th->seq = htonl(seq + vseq->previous_delta);
-			IP_VS_DBG(9, "vs_fix_seq(): added previous_delta "
-				  "(%d) to seq\n", vseq->previous_delta);
-		}
-	}
-}
-
-
-/*
- *	Fixes th->ack_seq based on ip_vs_seq info.
- */
-static inline void
-vs_fix_ack_seq(const struct ip_vs_seq *vseq, struct tcphdr *th)
-{
-	__u32 ack_seq = ntohl(th->ack_seq);
-
-	/*
-	 * Adjust ack_seq with delta-offset for
-	 * the packets AFTER most recent resized pkt has caused a shift
-	 * for packets before most recent resized pkt, use previous_delta
-	 */
-	if (vseq->delta || vseq->previous_delta) {
-		/* since ack_seq is the number of octet that is expected
-		   to receive next, so compare it with init_seq+delta */
-		if(after(ack_seq, vseq->init_seq+vseq->delta)) {
-			th->ack_seq = htonl(ack_seq - vseq->delta);
-			IP_VS_DBG(9, "vs_fix_ack_seq(): subtracted delta "
-				  "(%d) from ack_seq\n", vseq->delta);
-
-		} else {
-			th->ack_seq = htonl(ack_seq - vseq->previous_delta);
-			IP_VS_DBG(9, "vs_fix_ack_seq(): subtracted "
-				  "previous_delta (%d) from ack_seq\n",
-				  vseq->previous_delta);
-		}
-	}
-}
-
-
-/*
- *	Updates ip_vs_seq if pkt has been resized
- *	Assumes already checked proto==IPPROTO_TCP and diff!=0.
- */
-static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq,
-				 unsigned flag, __u32 seq, int diff)
-{
-	/* spinlock is to keep updating cp->flags atomic */
-	spin_lock(&cp->lock);
-	if (!(cp->flags & flag) || after(seq, vseq->init_seq)) {
-		vseq->previous_delta = vseq->delta;
-		vseq->delta += diff;
-		vseq->init_seq = seq;
-		cp->flags |= flag;
-	}
-	spin_unlock(&cp->lock);
-}
-
-static inline int app_tcp_pkt_out(struct ip_vs_conn *cp, struct sk_buff *skb,
-				  struct ip_vs_app *app)
-{
-	int diff;
-	const unsigned int tcp_offset = ip_hdrlen(skb);
-	struct tcphdr *th;
-	__u32 seq;
-
-	if (!skb_make_writable(skb, tcp_offset + sizeof(*th)))
-		return 0;
-
-	th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset);
-
-	/*
-	 *	Remember seq number in case this pkt gets resized
-	 */
-	seq = ntohl(th->seq);
-
-	/*
-	 *	Fix seq stuff if flagged as so.
-	 */
-	if (cp->flags & IP_VS_CONN_F_OUT_SEQ)
-		vs_fix_seq(&cp->out_seq, th);
-	if (cp->flags & IP_VS_CONN_F_IN_SEQ)
-		vs_fix_ack_seq(&cp->in_seq, th);
-
-	/*
-	 *	Call private output hook function
-	 */
-	if (app->pkt_out == NULL)
-		return 1;
-
-	if (!app->pkt_out(app, cp, skb, &diff))
-		return 0;
-
-	/*
-	 *	Update ip_vs seq stuff if len has changed.
-	 */
-	if (diff != 0)
-		vs_seq_update(cp, &cp->out_seq,
-			      IP_VS_CONN_F_OUT_SEQ, seq, diff);
-
-	return 1;
-}
-
-/*
- *	Output pkt hook. Will call bound ip_vs_app specific function
- *	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 *skb)
-{
-	struct ip_vs_app *app;
-
-	/*
-	 *	check if application module is bound to
-	 *	this ip_vs_conn.
-	 */
-	if ((app = cp->app) == NULL)
-		return 1;
-
-	/* TCP is complicated */
-	if (cp->protocol == IPPROTO_TCP)
-		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, skb, NULL);
-}
-
-
-static inline int app_tcp_pkt_in(struct ip_vs_conn *cp, struct sk_buff *skb,
-				 struct ip_vs_app *app)
-{
-	int diff;
-	const unsigned int tcp_offset = ip_hdrlen(skb);
-	struct tcphdr *th;
-	__u32 seq;
-
-	if (!skb_make_writable(skb, tcp_offset + sizeof(*th)))
-		return 0;
-
-	th = (struct tcphdr *)(skb_network_header(skb) + tcp_offset);
-
-	/*
-	 *	Remember seq number in case this pkt gets resized
-	 */
-	seq = ntohl(th->seq);
-
-	/*
-	 *	Fix seq stuff if flagged as so.
-	 */
-	if (cp->flags & IP_VS_CONN_F_IN_SEQ)
-		vs_fix_seq(&cp->in_seq, th);
-	if (cp->flags & IP_VS_CONN_F_OUT_SEQ)
-		vs_fix_ack_seq(&cp->out_seq, th);
-
-	/*
-	 *	Call private input hook function
-	 */
-	if (app->pkt_in == NULL)
-		return 1;
-
-	if (!app->pkt_in(app, cp, skb, &diff))
-		return 0;
-
-	/*
-	 *	Update ip_vs seq stuff if len has changed.
-	 */
-	if (diff != 0)
-		vs_seq_update(cp, &cp->in_seq,
-			      IP_VS_CONN_F_IN_SEQ, seq, diff);
-
-	return 1;
-}
-
-/*
- *	Input pkt hook. Will call bound ip_vs_app specific function
- *	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 *skb)
-{
-	struct ip_vs_app *app;
-
-	/*
-	 *	check if application module is bound to
-	 *	this ip_vs_conn.
-	 */
-	if ((app = cp->app) == NULL)
-		return 1;
-
-	/* TCP is complicated */
-	if (cp->protocol == IPPROTO_TCP)
-		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, skb, NULL);
-}
-
-
-#ifdef CONFIG_PROC_FS
-/*
- *	/proc/net/ip_vs_app entry function
- */
-
-static struct ip_vs_app *ip_vs_app_idx(loff_t pos)
-{
-	struct ip_vs_app *app, *inc;
-
-	list_for_each_entry(app, &ip_vs_app_list, a_list) {
-		list_for_each_entry(inc, &app->incs_list, a_list) {
-			if (pos-- == 0)
-				return inc;
-		}
-	}
-	return NULL;
-
-}
-
-static void *ip_vs_app_seq_start(struct seq_file *seq, loff_t *pos)
-{
-	mutex_lock(&__ip_vs_app_mutex);
-
-	return *pos ? ip_vs_app_idx(*pos - 1) : SEQ_START_TOKEN;
-}
-
-static void *ip_vs_app_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
-	struct ip_vs_app *inc, *app;
-	struct list_head *e;
-
-	++*pos;
-	if (v == SEQ_START_TOKEN)
-		return ip_vs_app_idx(0);
-
-	inc = v;
-	app = inc->app;
-
-	if ((e = inc->a_list.next) != &app->incs_list)
-		return list_entry(e, struct ip_vs_app, a_list);
-
-	/* go on to next application */
-	for (e = app->a_list.next; e != &ip_vs_app_list; e = e->next) {
-		app = list_entry(e, struct ip_vs_app, a_list);
-		list_for_each_entry(inc, &app->incs_list, a_list) {
-			return inc;
-		}
-	}
-	return NULL;
-}
-
-static void ip_vs_app_seq_stop(struct seq_file *seq, void *v)
-{
-	mutex_unlock(&__ip_vs_app_mutex);
-}
-
-static int ip_vs_app_seq_show(struct seq_file *seq, void *v)
-{
-	if (v == SEQ_START_TOKEN)
-		seq_puts(seq, "prot port    usecnt name\n");
-	else {
-		const struct ip_vs_app *inc = v;
-
-		seq_printf(seq, "%-3s  %-7u %-6d %-17s\n",
-			   ip_vs_proto_name(inc->protocol),
-			   ntohs(inc->port),
-			   atomic_read(&inc->usecnt),
-			   inc->name);
-	}
-	return 0;
-}
-
-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,
-	.show  = ip_vs_app_seq_show,
-};
-
-static int ip_vs_app_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &ip_vs_app_seq_ops);
-}
-
-static const struct file_operations ip_vs_app_fops = {
-	.owner	 = THIS_MODULE,
-	.open	 = ip_vs_app_open,
-	.read	 = seq_read,
-	.llseek  = seq_lseek,
-	.release = seq_release,
-};
-#endif
-
-
-/*
- *	Replace a segment of data with a new segment
- */
-int ip_vs_skb_replace(struct sk_buff *skb, gfp_t pri,
-		      char *o_buf, int o_len, char *n_buf, int n_len)
-{
-	int diff;
-	int o_offset;
-	int o_left;
-
-	EnterFunction(9);
-
-	diff = n_len - o_len;
-	o_offset = o_buf - (char *)skb->data;
-	/* The length of left data after o_buf+o_len in the skb data */
-	o_left = skb->len - (o_offset + o_len);
-
-	if (diff <= 0) {
-		memmove(o_buf + n_len, o_buf + o_len, o_left);
-		memcpy(o_buf, n_buf, n_len);
-		skb_trim(skb, skb->len + diff);
-	} else if (diff <= skb_tailroom(skb)) {
-		skb_put(skb, diff);
-		memmove(o_buf + n_len, o_buf + o_len, o_left);
-		memcpy(o_buf, n_buf, n_len);
-	} else {
-		if (pskb_expand_head(skb, skb_headroom(skb), diff, pri))
-			return -ENOMEM;
-		skb_put(skb, diff);
-		memmove(skb->data + o_offset + n_len,
-			skb->data + o_offset + o_len, o_left);
-		skb_copy_to_linear_data_offset(skb, o_offset, n_buf, n_len);
-	}
-
-	/* must update the iph total length here */
-	ip_hdr(skb)->tot_len = htons(skb->len);
-
-	LeaveFunction(9);
-	return 0;
-}
-
-
-int __init ip_vs_app_init(void)
-{
-	/* we will replace it with proc_net_ipvs_create() soon */
-	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(&init_net, "ip_vs_app");
-}