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[IPVS]: Create synced connections with their real state 

With this patch the synced connections are created with their real state,
which can be changed on the next synchronizations if necessary. This way
on fail-over all the connections will be treated according to their actual
state, causing no scheduling problems (the active and the nonactive
connections have different weights in the schedulers).
The backwards compatibility is preserved and the existing tools will show
the true connection states even on the backup director.

Signed-off-by: Rumen G. Bogdanovski <rumen@voicecho.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rumen G. Bogdanovski 2007-11-19 21:53:27 -08:00 committed by David S. Miller
parent 7a4fbb1fa4
commit b209639e8a
2 changed files with 41 additions and 7 deletions
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16
net/ipv4/ipvs/ip_vs_conn.c
View File

@ -393,7 +393,15 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
atomic_inc(&dest->refcnt);
/* Bind with the destination and its corresponding transmitter */
cp->flags |= atomic_read(&dest->conn_flags);
if ((cp->flags & IP_VS_CONN_F_SYNC) &&
(!(cp->flags & IP_VS_CONN_F_TEMPLATE)))
/* if the connection is not template and is created
* by sync, preserve the activity flag.
*/
cp->flags |= atomic_read(&dest->conn_flags) &
(~IP_VS_CONN_F_INACTIVE);
else
cp->flags |= atomic_read(&dest->conn_flags);
cp->dest = dest;
IP_VS_DBG(7, "Bind-dest %s c:%u.%u.%u.%u:%d v:%u.%u.%u.%u:%d "
@ -412,7 +420,11 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
/* It is a normal connection, so increase the inactive
connection counter because it is in TCP SYNRECV
state (inactive) or other protocol inacive state */
atomic_inc(&dest->inactconns);
if ((cp->flags & IP_VS_CONN_F_SYNC) &&
(!(cp->flags & IP_VS_CONN_F_INACTIVE)))
atomic_inc(&dest->activeconns);
else
atomic_inc(&dest->inactconns);
} else {
/* It is a persistent connection/template, so increase
the peristent connection counter */

32
net/ipv4/ipvs/ip_vs_sync.c
View File

@ -305,10 +305,11 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
p = (char *)buffer + sizeof(struct ip_vs_sync_mesg);
for (i=0; i<m->nr_conns; i++) {
unsigned flags;
unsigned flags, state;
s = (struct ip_vs_sync_conn *)p;
flags = ntohs(s->flags) | IP_VS_CONN_F_SYNC;
state = ntohs(s->state);
if (!(flags & IP_VS_CONN_F_TEMPLATE))
cp = ip_vs_conn_in_get(s->protocol,
s->caddr, s->cport,
@ -326,6 +327,13 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
dest = ip_vs_find_dest(s->daddr, s->dport,
s->vaddr, s->vport,
s->protocol);
/* Set the approprite ativity flag */
if (s->protocol == IPPROTO_TCP) {
if (state != IP_VS_TCP_S_ESTABLISHED)
flags |= IP_VS_CONN_F_INACTIVE;
else
flags &= ~IP_VS_CONN_F_INACTIVE;
}
cp = ip_vs_conn_new(s->protocol,
s->caddr, s->cport,
s->vaddr, s->vport,
@ -337,7 +345,7 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
IP_VS_ERR("ip_vs_conn_new failed\n");
return;
}
cp->state = ntohs(s->state);
cp->state = state;
} else if (!cp->dest) {
dest = ip_vs_try_bind_dest(cp);
if (!dest) {
@ -346,8 +354,22 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
cp->flags = flags | IP_VS_CONN_F_HASHED;
} else
atomic_dec(&dest->refcnt);
} /* Note that we don't touch its state and flags
if it is a normal entry. */
} 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;
}
}
if (flags & IP_VS_CONN_F_SEQ_MASK) {
opt = (struct ip_vs_sync_conn_options *)&s[1];
@ -357,7 +379,7 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
p += SIMPLE_CONN_SIZE;
atomic_set(&cp->in_pkts, sysctl_ip_vs_sync_threshold[0]);
cp->state = ntohs(s->state);
cp->state = state;
pp = ip_vs_proto_get(s->protocol);
cp->timeout = pp->timeout_table[cp->state];
ip_vs_conn_put(cp);