#include <linux/wait.h>
#include <linux/kernel.h>
+#include <asm/unaligned.h> /* Used for ntoh_seq and hton_seq */
+
#include <net/ip.h>
#include <net/sock.h>
.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)
{
ip_vs_sync_conn(cp->control);
}
+/*
+ * fill_param used by version 1
+ */
static inline int
-ip_vs_conn_fill_param_sync(int af, int protocol,
- const union nf_inet_addr *caddr, __be16 cport,
- const union nf_inet_addr *vaddr, __be16 vport,
- struct ip_vs_conn_param *p)
+ip_vs_conn_fill_param_sync(int af, union ip_vs_sync_conn *sc,
+ struct ip_vs_conn_param *p,
+ __u8 *pe_data, unsigned int pe_data_len,
+ __u8 *pe_name, unsigned int pe_name_len)
{
- /* XXX: Need to take into account persistence engine */
- ip_vs_conn_fill_param(af, protocol, caddr, cport, vaddr, vport, p);
+#ifdef CONFIG_IP_VS_IPV6
+ 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;
}
/*
- * Process received multicast message and create the corresponding
- * ip_vs_conn entries.
+ * Connection Add / Update.
+ * Common for version 0 and 1 reception of backup sync_conns.
+ * Param: ...
+ * timeout is in sec.
+ */
+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(char *buffer, const size_t buflen)
+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_conn_v0 *s;
struct ip_vs_sync_conn_options *opt;
- struct ip_vs_conn *cp;
struct ip_vs_protocol *pp;
- struct ip_vs_dest *dest;
struct ip_vs_conn_param param;
char *p;
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);
for (i=0; i<m->nr_conns; i++) {
unsigned flags, state;
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;
}
s = (struct ip_vs_sync_conn_v0 *) p;
opt = (struct ip_vs_sync_conn_options *)&s[1];
p += FULL_CONN_SIZE;
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;
}
} else {
if (!(flags & IP_VS_CONN_F_TEMPLATE)) {
pp = ip_vs_proto_get(s->protocol);
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);
continue;
}
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);
continue;
}
/* protocol in templates is not used for state/timeout */
pp = NULL;
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 = 0;
}
}
- if (ip_vs_conn_fill_param_sync(AF_INET, s->protocol,
- (union nf_inet_addr *)&s->caddr,
- s->cport,
- (union nf_inet_addr *)&s->vaddr,
- s->vport, ¶m)) {
- pr_err("ip_vs_conn_fill_param_sync failed");
- return;
+ ip_vs_conn_fill_param(AF_INET, s->protocol,
+ (const union nf_inet_addr *)&s->caddr,
+ s->cport,
+ (const union nf_inet_addr *)&s->vaddr,
+ s->vport, ¶m);
+
+ /* Send timeout as Zero */
+ ip_vs_proc_conn(¶m, flags, state, s->protocol, AF_INET,
+ (union nf_inet_addr *)&s->daddr, s->dport,
+ 0, 0, opt, pp);
+ }
+}
+
+/*
+ * Handle options
+ */
+static inline int ip_vs_proc_seqopt(__u8 *p, unsigned int plen,
+ __u32 *opt_flags,
+ struct ip_vs_sync_conn_options *opt)
+{
+ struct ip_vs_sync_conn_options *topt;
+
+ topt = (struct ip_vs_sync_conn_options *)p;
+
+ if (plen != sizeof(struct ip_vs_sync_conn_options)) {
+ IP_VS_DBG(2, "BACKUP, bogus conn options length\n");
+ return -EINVAL;
+ }
+ if (*opt_flags & IPVS_OPT_F_SEQ_DATA) {
+ IP_VS_DBG(2, "BACKUP, conn options found twice\n");
+ return -EINVAL;
+ }
+ ntoh_seq(&topt->in_seq, &opt->in_seq);
+ ntoh_seq(&topt->out_seq, &opt->out_seq);
+ *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;
+ }
}
- if (!(flags & IP_VS_CONN_F_TEMPLATE))
- cp = ip_vs_conn_in_get(¶m);
- else
- cp = ip_vs_ct_in_get(¶m);
- 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(AF_INET,
- (union nf_inet_addr *)&s->daddr,
- s->dport,
- (union nf_inet_addr *)&s->vaddr,
- s->vport,
- s->protocol, 0);
- /* 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;
- } else if (s->protocol == IPPROTO_SCTP) {
- if (state != IP_VS_SCTP_S_ESTABLISHED)
- flags |= IP_VS_CONN_F_INACTIVE;
- else
- flags &= ~IP_VS_CONN_F_INACTIVE;
+ p += plen; /* Next option */
+ }
+
+ /* Get flags and Mask off unsupported */
+ flags = ntohl(s->v4.flags) & IP_VS_CONN_F_BACKUP_MASK;
+ 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, ¶m,
+ 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(¶m, 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(¶m, 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;
}
- cp = ip_vs_conn_new(¶m,
- (union nf_inet_addr *)&s->daddr,
- s->dport, flags, dest, 0);
- if (dest)
- atomic_dec(&dest->refcnt);
- if (!cp) {
- pr_err("ip_vs_conn_new failed\n");
+ s = (union ip_vs_sync_conn *)p;
+ size = ntohs(s->v4.ver_size) & SVER_MASK;
+ msg_end = p + size;
+ /* Basic sanity checks */
+ if (msg_end > buffer+buflen) {
+ IP_VS_ERR_RL("BACKUP, Dropping buffer, msg > buffer\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;
+ if (ntohs(s->v4.ver_size) >> SVER_SHIFT) {
+ IP_VS_ERR_RL("BACKUP, Dropping buffer, Unknown version %d\n",
+ ntohs(s->v4.ver_size) >> SVER_SHIFT);
+ return;
}
- } 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;
+ /* 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);
}
-
- 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;
- /*
- * 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);
+ } else {
+ /* Old type of message */
+ ip_vs_process_message_v0(buffer, buflen);
+ return;
}
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff