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IPVS: Backup, Adding Version 1 receive capability

Browse source 
Functionality improvements
 * flags  changed from 16 to 32 bits
 * fwmark added (32 bits)
 * timeout in sec. added (32 bits)
 * pe data added (Variable length)
 * IPv6 capabilities (3x16 bytes for addr.)
 * Version and type in every conn msg.

ip_vs_process_message() now handles Version 1 messages
and will call ip_vs_process_message_v0() for version 0 messages.

ip_vs_proc_conn() is common for both version, and handles the update of
connection hash.

ip_vs_conn_fill_param_sync()    - Version 1 messages only
ip_vs_conn_fill_param_sync_v0() - Version 0 messages only

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Hans Schillstrom 2010-11-19 14:25:12 +01:00 committed by Simon Horman
parent 2981bc9a63
commit fe5e7a1efb
4 changed files with 441 additions and 124 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
include/linux/ip_vs.h
View file

@ -89,6 +89,14 @@
#define IP_VS_CONN_F_TEMPLATE 0x1000 /* template, not connection */ #define IP_VS_CONN_F_TEMPLATE 0x1000 /* template, not connection */
#define IP_VS_CONN_F_ONE_PACKET 0x2000 /* forward only one packet */ #define IP_VS_CONN_F_ONE_PACKET 0x2000 /* forward only one packet */
#define IP_VS_CONN_F_BACKUP_MASK (IP_VS_CONN_F_FWD_MASK | \
IP_VS_CONN_F_NOOUTPUT | \
IP_VS_CONN_F_INACTIVE | \
IP_VS_CONN_F_SEQ_MASK | \
IP_VS_CONN_F_NO_CPORT | \
IP_VS_CONN_F_TEMPLATE \
)
/* Flags that are not sent to backup server start from bit 16 */ /* Flags that are not sent to backup server start from bit 16 */
#define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */ #define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */

1
include/net/ip_vs.h
View file

@ -817,6 +817,7 @@ void ip_vs_unbind_pe(struct ip_vs_service *svc);
int register_ip_vs_pe(struct ip_vs_pe *pe); int register_ip_vs_pe(struct ip_vs_pe *pe);
int unregister_ip_vs_pe(struct ip_vs_pe *pe); int unregister_ip_vs_pe(struct ip_vs_pe *pe);
struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); struct ip_vs_pe *ip_vs_pe_getbyname(const char *name);
struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name);
static inline void ip_vs_pe_get(const struct ip_vs_pe *pe) static inline void ip_vs_pe_get(const struct ip_vs_pe *pe)
{ {

5
net/netfilter/ipvs/ip_vs_pe.c
View file

@ -29,12 +29,11 @@ void ip_vs_unbind_pe(struct ip_vs_service *svc)
} }
/* Get pe in the pe list by name */ /* Get pe in the pe list by name */
static struct ip_vs_pe * 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; struct ip_vs_pe *pe;
IP_VS_DBG(2, "%s(): pe_name \"%s\"\n", __func__, IP_VS_DBG(10, "%s(): pe_name \"%s\"\n", __func__,
pe_name); pe_name);
spin_lock_bh(&ip_vs_pe_lock); spin_lock_bh(&ip_vs_pe_lock);

551
net/netfilter/ipvs/ip_vs_sync.c
View file

@ -35,6 +35,8 @@
#include <linux/wait.h> #include <linux/wait.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <asm/unaligned.h> /* Used for ntoh_seq and hton_seq */
#include <net/ip.h> #include <net/ip.h>
#include <net/sock.h> #include <net/sock.h>
@ -286,6 +288,16 @@ static struct sockaddr_in mcast_addr = {
.sin_addr.s_addr = cpu_to_be32(IP_VS_SYNC_GROUP), .sin_addr.s_addr = cpu_to_be32(IP_VS_SYNC_GROUP),
}; };
/*
* Copy of struct ip_vs_seq
* From unaligned network order to aligned host order
*/
static void ntoh_seq(struct ip_vs_seq *no, struct ip_vs_seq *ho)
{
ho->init_seq = get_unaligned_be32(&no->init_seq);
ho->delta = get_unaligned_be32(&no->delta);
ho->previous_delta = get_unaligned_be32(&no->previous_delta);
}
static inline struct ip_vs_sync_buff *sb_dequeue(void) static inline struct ip_vs_sync_buff *sb_dequeue(void)
{ {
@ -418,59 +430,186 @@ void ip_vs_sync_conn(const struct ip_vs_conn *cp)
ip_vs_sync_conn(cp->control); ip_vs_sync_conn(cp->control);
} }
/*
* fill_param used by version 1
*/
static inline int static inline int
ip_vs_conn_fill_param_sync(int af, int protocol, ip_vs_conn_fill_param_sync(int af, union ip_vs_sync_conn *sc,
const union nf_inet_addr *caddr, __be16 cport, struct ip_vs_conn_param *p,
const union nf_inet_addr *vaddr, __be16 vport, __u8 *pe_data, unsigned int pe_data_len,
struct ip_vs_conn_param *p) __u8 *pe_name, unsigned int pe_name_len)
{ {
/* XXX: Need to take into account persistence engine */ #ifdef CONFIG_IP_VS_IPV6
ip_vs_conn_fill_param(af, protocol, caddr, cport, vaddr, vport, p); if (af == AF_INET6)
ip_vs_conn_fill_param(af, sc->v6.protocol,
(const union nf_inet_addr *)&sc->v6.caddr,
sc->v6.cport,
(const union nf_inet_addr *)&sc->v6.vaddr,
sc->v6.vport, p);
else
#endif
ip_vs_conn_fill_param(af, sc->v4.protocol,
(const union nf_inet_addr *)&sc->v4.caddr,
sc->v4.cport,
(const union nf_inet_addr *)&sc->v4.vaddr,
sc->v4.vport, p);
/* Handle pe data */
if (pe_data_len) {
if (pe_name_len) {
char buff[IP_VS_PENAME_MAXLEN+1];
memcpy(buff, pe_name, pe_name_len);
buff[pe_name_len]=0;
p->pe = __ip_vs_pe_getbyname(buff);
if (!p->pe) {
IP_VS_DBG(3, "BACKUP, no %s engine found/loaded\n", buff);
return 1;
}
} else {
IP_VS_ERR_RL("BACKUP, Invalid PE parameters\n");
return 1;
}
p->pe_data = kmalloc(pe_data_len, GFP_ATOMIC);
if (!p->pe_data) {
if (p->pe->module)
module_put(p->pe->module);
return -ENOMEM;
}
memcpy(p->pe_data, pe_data, pe_data_len);
p->pe_data_len = pe_data_len;
}
return 0; return 0;
} }
/* /*
* Process received multicast message and create the corresponding * Connection Add / Update.
* ip_vs_conn entries. * Common for version 0 and 1 reception of backup sync_conns.
* Param: ...
* timeout is in sec.
*/ */
static void ip_vs_process_message(char *buffer, const size_t buflen) static void ip_vs_proc_conn(struct ip_vs_conn_param *param, unsigned flags,
unsigned state, unsigned protocol, unsigned type,
const union nf_inet_addr *daddr, __be16 dport,
unsigned long timeout, __u32 fwmark,
struct ip_vs_sync_conn_options *opt,
struct ip_vs_protocol *pp)
{
struct ip_vs_dest *dest;
struct ip_vs_conn *cp;
if (!(flags & IP_VS_CONN_F_TEMPLATE))
cp = ip_vs_conn_in_get(param);
else
cp = ip_vs_ct_in_get(param);
if (cp && param->pe_data) /* Free pe_data */
kfree(param->pe_data);
if (!cp) {
/*
* Find the appropriate destination for the connection.
* If it is not found the connection will remain unbound
* but still handled.
*/
dest = ip_vs_find_dest(type, daddr, dport, param->vaddr,
param->vport, protocol, fwmark);
/* Set the approprite ativity flag */
if (protocol == IPPROTO_TCP) {
if (state != IP_VS_TCP_S_ESTABLISHED)
flags |= IP_VS_CONN_F_INACTIVE;
else
flags &= ~IP_VS_CONN_F_INACTIVE;
} else if (protocol == IPPROTO_SCTP) {
if (state != IP_VS_SCTP_S_ESTABLISHED)
flags |= IP_VS_CONN_F_INACTIVE;
else
flags &= ~IP_VS_CONN_F_INACTIVE;
}
cp = ip_vs_conn_new(param, daddr, dport, flags, dest, fwmark);
if (dest)
atomic_dec(&dest->refcnt);
if (!cp) {
if (param->pe_data)
kfree(param->pe_data);
IP_VS_DBG(2, "BACKUP, add new conn. failed\n");
return;
}
} else if (!cp->dest) {
dest = ip_vs_try_bind_dest(cp);
if (dest)
atomic_dec(&dest->refcnt);
} else if ((cp->dest) && (cp->protocol == IPPROTO_TCP) &&
(cp->state != state)) {
/* update active/inactive flag for the connection */
dest = cp->dest;
if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
(state != IP_VS_TCP_S_ESTABLISHED)) {
atomic_dec(&dest->activeconns);
atomic_inc(&dest->inactconns);
cp->flags |= IP_VS_CONN_F_INACTIVE;
} else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
(state == IP_VS_TCP_S_ESTABLISHED)) {
atomic_inc(&dest->activeconns);
atomic_dec(&dest->inactconns);
cp->flags &= ~IP_VS_CONN_F_INACTIVE;
}
} else if ((cp->dest) && (cp->protocol == IPPROTO_SCTP) &&
(cp->state != state)) {
dest = cp->dest;
if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
(state != IP_VS_SCTP_S_ESTABLISHED)) {
atomic_dec(&dest->activeconns);
atomic_inc(&dest->inactconns);
cp->flags &= ~IP_VS_CONN_F_INACTIVE;
}
}
if (opt)
memcpy(&cp->in_seq, opt, sizeof(*opt));
atomic_set(&cp->in_pkts, sysctl_ip_vs_sync_threshold[0]);
cp->state = state;
cp->old_state = cp->state;
/*
* For Ver 0 messages style
* - Not possible to recover the right timeout for templates
* - can not find the right fwmark
* virtual service. If needed, we can do it for
* non-fwmark persistent services.
* Ver 1 messages style.
* - No problem.
*/
if (timeout) {
if (timeout > MAX_SCHEDULE_TIMEOUT / HZ)
timeout = MAX_SCHEDULE_TIMEOUT / HZ;
cp->timeout = timeout*HZ;
} else if (!(flags & IP_VS_CONN_F_TEMPLATE) && pp->timeout_table)
cp->timeout = pp->timeout_table[state];
else
cp->timeout = (3*60*HZ);
ip_vs_conn_put(cp);
}
/*
* Process received multicast message for Version 0
*/
static void ip_vs_process_message_v0(const char *buffer, const size_t buflen)
{ {
struct ip_vs_sync_mesg *m = (struct ip_vs_sync_mesg *)buffer; struct ip_vs_sync_mesg *m = (struct ip_vs_sync_mesg *)buffer;
struct ip_vs_sync_conn_v0 *s; struct ip_vs_sync_conn_v0 *s;
struct ip_vs_sync_conn_options *opt; struct ip_vs_sync_conn_options *opt;
struct ip_vs_conn *cp;
struct ip_vs_protocol *pp; struct ip_vs_protocol *pp;
struct ip_vs_dest *dest;
struct ip_vs_conn_param param; struct ip_vs_conn_param param;
char *p; char *p;
int i; int i;
if (buflen < sizeof(struct ip_vs_sync_mesg)) {
IP_VS_ERR_RL("sync message header too short\n");
return;
}
/* Convert size back to host byte order */
m->size = ntohs(m->size);
if (buflen != m->size) {
IP_VS_ERR_RL("bogus sync message size\n");
return;
}
/* SyncID sanity check */
if (ip_vs_backup_syncid != 0 && m->syncid != ip_vs_backup_syncid) {
IP_VS_DBG(7, "Ignoring incoming msg with syncid = %d\n",
m->syncid);
return;
}
p = (char *)buffer + sizeof(struct ip_vs_sync_mesg); p = (char *)buffer + sizeof(struct ip_vs_sync_mesg);
for (i=0; i<m->nr_conns; i++) { for (i=0; i<m->nr_conns; i++) {
unsigned flags, state; unsigned flags, state;
if (p + SIMPLE_CONN_SIZE > buffer+buflen) { if (p + SIMPLE_CONN_SIZE > buffer+buflen) {
IP_VS_ERR_RL("bogus conn in sync message\n"); IP_VS_ERR_RL("BACKUP v0, bogus conn\n");
return; return;
} }
s = (struct ip_vs_sync_conn_v0 *) p; s = (struct ip_vs_sync_conn_v0 *) p;
@ -480,7 +619,7 @@ static void ip_vs_process_message(char *buffer, const size_t buflen)
opt = (struct ip_vs_sync_conn_options *)&s[1]; opt = (struct ip_vs_sync_conn_options *)&s[1];
p += FULL_CONN_SIZE; p += FULL_CONN_SIZE;
if (p > buffer+buflen) { if (p > buffer+buflen) {
IP_VS_ERR_RL("bogus conn options in sync message\n"); IP_VS_ERR_RL("BACKUP v0, Dropping buffer bogus conn options\n");
return; return;
} }
} else { } else {
@ -492,12 +631,12 @@ static void ip_vs_process_message(char *buffer, const size_t buflen)
if (!(flags & IP_VS_CONN_F_TEMPLATE)) { if (!(flags & IP_VS_CONN_F_TEMPLATE)) {
pp = ip_vs_proto_get(s->protocol); pp = ip_vs_proto_get(s->protocol);
if (!pp) { if (!pp) {
IP_VS_ERR_RL("Unsupported protocol %u in sync msg\n", IP_VS_DBG(2, "BACKUP v0, Unsupported protocol %u\n",
s->protocol); s->protocol);
continue; continue;
} }
if (state >= pp->num_states) { if (state >= pp->num_states) {
IP_VS_DBG(2, "Invalid %s state %u in sync msg\n", IP_VS_DBG(2, "BACKUP v0, Invalid %s state %u\n",
pp->name, state); pp->name, state);
continue; continue;
} }
@ -505,103 +644,273 @@ static void ip_vs_process_message(char *buffer, const size_t buflen)
/* protocol in templates is not used for state/timeout */ /* protocol in templates is not used for state/timeout */
pp = NULL; pp = NULL;
if (state > 0) { if (state > 0) {
IP_VS_DBG(2, "Invalid template state %u in sync msg\n", IP_VS_DBG(2, "BACKUP v0, Invalid template state %u\n",
state); state);
state = 0; state = 0;
} }
} }
if (ip_vs_conn_fill_param_sync(AF_INET, s->protocol, ip_vs_conn_fill_param(AF_INET, s->protocol,
(union nf_inet_addr *)&s->caddr, (const union nf_inet_addr *)&s->caddr,
s->cport, s->cport,
(union nf_inet_addr *)&s->vaddr, (const union nf_inet_addr *)&s->vaddr,
s->vport, &param)) { s->vport, &param);
pr_err("ip_vs_conn_fill_param_sync failed");
return; /* Send timeout as Zero */
} ip_vs_proc_conn(&param, flags, state, s->protocol, AF_INET,
if (!(flags & IP_VS_CONN_F_TEMPLATE)) (union nf_inet_addr *)&s->daddr, s->dport,
cp = ip_vs_conn_in_get(&param); 0, 0, opt, pp);
else }
cp = ip_vs_ct_in_get(&param); }
if (!cp) {
/* /*
* Find the appropriate destination for the connection. * Handle options
* If it is not found the connection will remain unbound */
* but still handled. static inline int ip_vs_proc_seqopt(__u8 *p, unsigned int plen,
*/ __u32 *opt_flags,
dest = ip_vs_find_dest(AF_INET, struct ip_vs_sync_conn_options *opt)
(union nf_inet_addr *)&s->daddr, {
s->dport, struct ip_vs_sync_conn_options *topt;
(union nf_inet_addr *)&s->vaddr,
s->vport, topt = (struct ip_vs_sync_conn_options *)p;
s->protocol, 0);
/* Set the approprite ativity flag */ if (plen != sizeof(struct ip_vs_sync_conn_options)) {
if (s->protocol == IPPROTO_TCP) { IP_VS_DBG(2, "BACKUP, bogus conn options length\n");
if (state != IP_VS_TCP_S_ESTABLISHED) return -EINVAL;
flags |= IP_VS_CONN_F_INACTIVE; }
else if (*opt_flags & IPVS_OPT_F_SEQ_DATA) {
flags &= ~IP_VS_CONN_F_INACTIVE; IP_VS_DBG(2, "BACKUP, conn options found twice\n");
} else if (s->protocol == IPPROTO_SCTP) { return -EINVAL;
if (state != IP_VS_SCTP_S_ESTABLISHED) }
flags |= IP_VS_CONN_F_INACTIVE; ntoh_seq(&topt->in_seq, &opt->in_seq);
else ntoh_seq(&topt->out_seq, &opt->out_seq);
flags &= ~IP_VS_CONN_F_INACTIVE; *opt_flags |= IPVS_OPT_F_SEQ_DATA;
return 0;
}
static int ip_vs_proc_str(__u8 *p, unsigned int plen, unsigned int *data_len,
__u8 **data, unsigned int maxlen,
__u32 *opt_flags, __u32 flag)
{
if (plen > maxlen) {
IP_VS_DBG(2, "BACKUP, bogus par.data len > %d\n", maxlen);
return -EINVAL;
}
if (*opt_flags & flag) {
IP_VS_DBG(2, "BACKUP, Par.data found twice 0x%x\n", flag);
return -EINVAL;
}
*data_len = plen;
*data = p;
*opt_flags |= flag;
return 0;
}
/*
* Process a Version 1 sync. connection
*/
static inline int ip_vs_proc_sync_conn(__u8 *p, __u8 *msg_end)
{
struct ip_vs_sync_conn_options opt;
union ip_vs_sync_conn *s;
struct ip_vs_protocol *pp;
struct ip_vs_conn_param param;
__u32 flags;
unsigned int af, state, pe_data_len=0, pe_name_len=0;
__u8 *pe_data=NULL, *pe_name=NULL;
__u32 opt_flags=0;
int retc=0;
s = (union ip_vs_sync_conn *) p;
if (s->v6.type & STYPE_F_INET6) {
#ifdef CONFIG_IP_VS_IPV6
af = AF_INET6;
p += sizeof(struct ip_vs_sync_v6);
#else
IP_VS_DBG(3,"BACKUP, IPv6 msg received, and IPVS is not compiled for IPv6\n");
retc = 10;
goto out;
#endif
} else if (!s->v4.type) {
af = AF_INET;
p += sizeof(struct ip_vs_sync_v4);
} else {
return -10;
}
if (p > msg_end)
return -20;
/* Process optional params check Type & Len. */
while (p < msg_end) {
int ptype;
int plen;
if (p+2 > msg_end)
return -30;
ptype = *(p++);
plen = *(p++);
if (!plen || ((p + plen) > msg_end))
return -40;
/* Handle seq option p = param data */
switch (ptype & ~IPVS_OPT_F_PARAM) {
case IPVS_OPT_SEQ_DATA:
if (ip_vs_proc_seqopt(p, plen, &opt_flags, &opt))
return -50;
break;
case IPVS_OPT_PE_DATA:
if (ip_vs_proc_str(p, plen, &pe_data_len, &pe_data,
IP_VS_PEDATA_MAXLEN, &opt_flags,
IPVS_OPT_F_PE_DATA))
return -60;
break;
case IPVS_OPT_PE_NAME:
if (ip_vs_proc_str(p, plen,&pe_name_len, &pe_name,
IP_VS_PENAME_MAXLEN, &opt_flags,
IPVS_OPT_F_PE_NAME))
return -70;
break;
default:
/* Param data mandatory ? */
if (!(ptype & IPVS_OPT_F_PARAM)) {
IP_VS_DBG(3, "BACKUP, Unknown mandatory param %d found\n",
ptype & ~IPVS_OPT_F_PARAM);
retc = 20;
goto out;
} }
cp = ip_vs_conn_new(&param, }
(union nf_inet_addr *)&s->daddr, p += plen; /* Next option */
s->dport, flags, dest, 0); }
if (dest)
atomic_dec(&dest->refcnt); /* Get flags and Mask off unsupported */
if (!cp) { flags = ntohl(s->v4.flags) & IP_VS_CONN_F_BACKUP_MASK;
pr_err("ip_vs_conn_new failed\n"); flags |= IP_VS_CONN_F_SYNC;
state = ntohs(s->v4.state);
if (!(flags & IP_VS_CONN_F_TEMPLATE)) {
pp = ip_vs_proto_get(s->v4.protocol);
if (!pp) {
IP_VS_DBG(3,"BACKUP, Unsupported protocol %u\n",
s->v4.protocol);
retc = 30;
goto out;
}
if (state >= pp->num_states) {
IP_VS_DBG(3, "BACKUP, Invalid %s state %u\n",
pp->name, state);
retc = 40;
goto out;
}
} else {
/* protocol in templates is not used for state/timeout */
pp = NULL;
if (state > 0) {
IP_VS_DBG(3, "BACKUP, Invalid template state %u\n",
state);
state = 0;
}
}
if (ip_vs_conn_fill_param_sync(af, s, &param,
pe_data, pe_data_len,
pe_name, pe_name_len)) {
retc = 50;
goto out;
}
/* If only IPv4, just silent skip IPv6 */
if (af == AF_INET)
ip_vs_proc_conn(&param, flags, state, s->v4.protocol, af,
(union nf_inet_addr *)&s->v4.daddr, s->v4.dport,
ntohl(s->v4.timeout), ntohl(s->v4.fwmark),
(opt_flags & IPVS_OPT_F_SEQ_DATA ? &opt : NULL),
pp);
#ifdef CONFIG_IP_VS_IPV6
else
ip_vs_proc_conn(&param, flags, state, s->v6.protocol, af,
(union nf_inet_addr *)&s->v6.daddr, s->v6.dport,
ntohl(s->v6.timeout), ntohl(s->v6.fwmark),
(opt_flags & IPVS_OPT_F_SEQ_DATA ? &opt : NULL),
pp);
#endif
return 0;
/* Error exit */
out:
IP_VS_DBG(2, "BACKUP, Single msg dropped err:%d\n", retc);
return retc;
}
/*
* Process received multicast message and create the corresponding
* ip_vs_conn entries.
* Handles Version 0 & 1
*/
static void ip_vs_process_message(__u8 *buffer, const size_t buflen)
{
struct ip_vs_sync_mesg_v2 *m2 = (struct ip_vs_sync_mesg_v2 *)buffer;
__u8 *p, *msg_end;
unsigned int i, nr_conns;
if (buflen < sizeof(struct ip_vs_sync_mesg)) {
IP_VS_DBG(2, "BACKUP, message header too short\n");
return;
}
/* Convert size back to host byte order */
m2->size = ntohs(m2->size);
if (buflen != m2->size) {
IP_VS_DBG(2, "BACKUP, bogus message size\n");
return;
}
/* SyncID sanity check */
if (ip_vs_backup_syncid != 0 && m2->syncid != ip_vs_backup_syncid) {
IP_VS_DBG(7, "BACKUP, Ignoring syncid = %d\n", m2->syncid);
return;
}
/* Handle version 1 message */
if ((m2->version == SYNC_PROTO_VER) && (m2->reserved == 0)
&& (m2->spare == 0)) {
msg_end = buffer + sizeof(struct ip_vs_sync_mesg_v2);
nr_conns = m2->nr_conns;
for (i=0; i<nr_conns; i++) {
union ip_vs_sync_conn *s;
unsigned size;
int retc;
p = msg_end;
if (p + sizeof(s->v4) > buffer+buflen) {
IP_VS_ERR_RL("BACKUP, Dropping buffer, to small\n");
return; return;
} }
} else if (!cp->dest) { s = (union ip_vs_sync_conn *)p;
dest = ip_vs_try_bind_dest(cp); size = ntohs(s->v4.ver_size) & SVER_MASK;
if (dest) msg_end = p + size;
atomic_dec(&dest->refcnt); /* Basic sanity checks */
} else if ((cp->dest) && (cp->protocol == IPPROTO_TCP) && if (msg_end > buffer+buflen) {
(cp->state != state)) { IP_VS_ERR_RL("BACKUP, Dropping buffer, msg > buffer\n");
/* update active/inactive flag for the connection */ return;
dest = cp->dest;
if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
(state != IP_VS_TCP_S_ESTABLISHED)) {
atomic_dec(&dest->activeconns);
atomic_inc(&dest->inactconns);
cp->flags |= IP_VS_CONN_F_INACTIVE;
} else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
(state == IP_VS_TCP_S_ESTABLISHED)) {
atomic_inc(&dest->activeconns);
atomic_dec(&dest->inactconns);
cp->flags &= ~IP_VS_CONN_F_INACTIVE;
} }
} else if ((cp->dest) && (cp->protocol == IPPROTO_SCTP) && if (ntohs(s->v4.ver_size) >> SVER_SHIFT) {
(cp->state != state)) { IP_VS_ERR_RL("BACKUP, Dropping buffer, Unknown version %d\n",
dest = cp->dest; ntohs(s->v4.ver_size) >> SVER_SHIFT);
if (!(cp->flags & IP_VS_CONN_F_INACTIVE) && return;
(state != IP_VS_SCTP_S_ESTABLISHED)) {
atomic_dec(&dest->activeconns);
atomic_inc(&dest->inactconns);
cp->flags &= ~IP_VS_CONN_F_INACTIVE;
} }
/* Process a single sync_conn */
if ((retc=ip_vs_proc_sync_conn(p, msg_end)) < 0) {
IP_VS_ERR_RL("BACKUP, Dropping buffer, Err: %d in decoding\n",
retc);
return;
}
/* Make sure we have 32 bit alignment */
msg_end = p + ((size + 3) & ~3);
} }
} else {
if (opt) /* Old type of message */
memcpy(&cp->in_seq, opt, sizeof(*opt)); ip_vs_process_message_v0(buffer, buflen);
atomic_set(&cp->in_pkts, sysctl_ip_vs_sync_threshold[0]); return;
cp->state = state;
cp->old_state = cp->state;
/*
* We can not recover the right timeout for templates
* in all cases, we can not find the right fwmark
* virtual service. If needed, we can do it for
* non-fwmark persistent services.
*/
if (!(flags & IP_VS_CONN_F_TEMPLATE) && pp->timeout_table)
cp->timeout = pp->timeout_table[state];
else
cp->timeout = (3*60*HZ);
ip_vs_conn_put(cp);
} }
} }