From: Hans Schillstrom Date: Fri, 19 Nov 2010 13:25:13 +0000 (+0100) Subject: IPVS: Backup, Change sending to Version 1 format X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=986a075795339c5ea1122ce9290dfd5504252eb0;p=openwrt%2Fstaging%2Fblogic.git IPVS: Backup, Change sending to Version 1 format Enable sending and removal of version 0 sending Affected functions, ip_vs_sync_buff_create() ip_vs_sync_conn() ip_vs_core.c removal of IPv4 check. *v5 Just check cp->pe_data_len in ip_vs_sync_conn Check if padding needed before adding a new sync_conn to the buffer, i.e. avoid sending padding at the end. *v4 moved sanity check and pe_name_len after sloop. use cp->pe instead of cp->dest->svc->pe real length in each sync_conn, not padded length however total size of a sync_msg includes padding. *v3 Sending ip_vs_sync_conn_options in network order. Sending Templates for ONE_PACKET conn. Renaming of ip_vs_sync_mesg to ip_vs_sync_mesg_v0 Signed-off-by: Hans Schillstrom Acked-by: Julian Anastasov Signed-off-by: Simon Horman --- diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index 4069484df7bb..a715f3db179a 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -919,7 +919,7 @@ extern char ip_vs_master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; extern char ip_vs_backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; extern int start_sync_thread(int state, char *mcast_ifn, __u8 syncid); extern int stop_sync_thread(int state); -extern void ip_vs_sync_conn(const struct ip_vs_conn *cp); +extern void ip_vs_sync_conn(struct ip_vs_conn *cp); /* diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c index 3445da6e8c95..5287771d0647 100644 --- a/net/netfilter/ipvs/ip_vs_core.c +++ b/net/netfilter/ipvs/ip_vs_core.c @@ -1560,9 +1560,15 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af) * * Sync connection if it is about to close to * encorage the standby servers to update the connections timeout + * + * For ONE_PKT let ip_vs_sync_conn() do the filter work. */ - pkts = atomic_add_return(1, &cp->in_pkts); - if (af == AF_INET && (ip_vs_sync_state & IP_VS_STATE_MASTER) && + if (cp->flags & IP_VS_CONN_F_ONE_PACKET) + pkts = sysctl_ip_vs_sync_threshold[0]; + else + pkts = atomic_add_return(1, &cp->in_pkts); + + if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && cp->protocol == IPPROTO_SCTP) { if ((cp->state == IP_VS_SCTP_S_ESTABLISHED && (pkts % sysctl_ip_vs_sync_threshold[1] @@ -1577,8 +1583,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af) } /* Keep this block last: TCP and others with pp->num_states <= 1 */ - else if (af == AF_INET && - (ip_vs_sync_state & IP_VS_STATE_MASTER) && + else if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && (((cp->protocol != IPPROTO_TCP || cp->state == IP_VS_TCP_S_ESTABLISHED) && (pkts % sysctl_ip_vs_sync_threshold[1] diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c index e071508901d1..df5abf0e25af 100644 --- a/net/netfilter/ipvs/ip_vs_sync.c +++ b/net/netfilter/ipvs/ip_vs_sync.c @@ -226,7 +226,7 @@ struct ip_vs_sync_thread_data { #define MAX_CONNS_PER_SYNCBUFF 255 /* nr_conns in ip_vs_sync_mesg is 8 bit */ /* Version 0 header */ -struct ip_vs_sync_mesg { +struct ip_vs_sync_mesg_v0 { __u8 nr_conns; __u8 syncid; __u16 size; @@ -235,7 +235,7 @@ struct ip_vs_sync_mesg { }; /* Version 1 header */ -struct ip_vs_sync_mesg_v2 { +struct ip_vs_sync_mesg { __u8 reserved; /* must be zero */ __u8 syncid; __u16 size; @@ -299,6 +299,17 @@ static void ntoh_seq(struct ip_vs_seq *no, struct ip_vs_seq *ho) ho->previous_delta = get_unaligned_be32(&no->previous_delta); } +/* + * Copy of struct ip_vs_seq + * From Aligned host order to unaligned network order + */ +static void hton_seq(struct ip_vs_seq *ho, struct ip_vs_seq *no) +{ + put_unaligned_be32(ho->init_seq, &no->init_seq); + put_unaligned_be32(ho->delta, &no->delta); + put_unaligned_be32(ho->previous_delta, &no->previous_delta); +} + static inline struct ip_vs_sync_buff *sb_dequeue(void) { struct ip_vs_sync_buff *sb; @@ -317,6 +328,9 @@ static inline struct ip_vs_sync_buff *sb_dequeue(void) return sb; } +/* + * Create a new sync buffer for Version 1 proto. + */ static inline struct ip_vs_sync_buff * ip_vs_sync_buff_create(void) { struct ip_vs_sync_buff *sb; @@ -328,11 +342,15 @@ static inline struct ip_vs_sync_buff * ip_vs_sync_buff_create(void) kfree(sb); return NULL; } - sb->mesg->nr_conns = 0; + sb->mesg->reserved = 0; /* old nr_conns i.e. must be zeo now */ + sb->mesg->version = SYNC_PROTO_VER; sb->mesg->syncid = ip_vs_master_syncid; - sb->mesg->size = 4; - sb->head = (unsigned char *)sb->mesg + 4; + sb->mesg->size = sizeof(struct ip_vs_sync_mesg); + sb->mesg->nr_conns = 0; + sb->mesg->spare = 0; + sb->head = (unsigned char *)sb->mesg + sizeof(struct ip_vs_sync_mesg); sb->end = (unsigned char *)sb->mesg + sync_send_mesg_maxlen; + sb->firstuse = jiffies; return sb; } @@ -373,18 +391,60 @@ get_curr_sync_buff(unsigned long time) return sb; } - /* * Add an ip_vs_conn information into the current sync_buff. * Called by ip_vs_in. + * Sending Version 1 messages */ -void ip_vs_sync_conn(const struct ip_vs_conn *cp) +void ip_vs_sync_conn(struct ip_vs_conn *cp) { struct ip_vs_sync_mesg *m; - struct ip_vs_sync_conn_v0 *s; - int len; + union ip_vs_sync_conn *s; + __u8 *p; + unsigned int len, pe_name_len, pad; + + /* Do not sync ONE PACKET */ + if (cp->flags & IP_VS_CONN_F_ONE_PACKET) + goto control; +sloop: + /* Sanity checks */ + pe_name_len = 0; + if (cp->pe_data_len) { + if (!cp->pe_data || !cp->dest) { + IP_VS_ERR_RL("SYNC, connection pe_data invalid\n"); + return; + } + pe_name_len = strnlen(cp->pe->name, IP_VS_PENAME_MAXLEN); + } spin_lock(&curr_sb_lock); + +#ifdef CONFIG_IP_VS_IPV6 + if (cp->af == AF_INET6) + len = sizeof(struct ip_vs_sync_v6); + else +#endif + len = sizeof(struct ip_vs_sync_v4); + + if (cp->flags & IP_VS_CONN_F_SEQ_MASK) + len += sizeof(struct ip_vs_sync_conn_options) + 2; + + if (cp->pe_data_len) + len += cp->pe_data_len + 2; /* + Param hdr field */ + if (pe_name_len) + len += pe_name_len + 2; + + /* check if there is a space for this one */ + pad = 0; + if (curr_sb) { + pad = (4 - (size_t)curr_sb->head) & 3; + if (curr_sb->head + len + pad > curr_sb->end) { + sb_queue_tail(curr_sb); + curr_sb = NULL; + pad = 0; + } + } + if (!curr_sb) { if (!(curr_sb=ip_vs_sync_buff_create())) { spin_unlock(&curr_sb_lock); @@ -393,41 +453,84 @@ void ip_vs_sync_conn(const struct ip_vs_conn *cp) } } - len = (cp->flags & IP_VS_CONN_F_SEQ_MASK) ? FULL_CONN_SIZE : - SIMPLE_CONN_SIZE; m = curr_sb->mesg; - s = (struct ip_vs_sync_conn_v0 *)curr_sb->head; - - /* copy members */ - s->protocol = cp->protocol; - s->cport = cp->cport; - s->vport = cp->vport; - s->dport = cp->dport; - s->caddr = cp->caddr.ip; - s->vaddr = cp->vaddr.ip; - s->daddr = cp->daddr.ip; - s->flags = htons(cp->flags & ~IP_VS_CONN_F_HASHED); - s->state = htons(cp->state); - if (cp->flags & IP_VS_CONN_F_SEQ_MASK) { - struct ip_vs_sync_conn_options *opt = - (struct ip_vs_sync_conn_options *)&s[1]; - memcpy(opt, &cp->in_seq, sizeof(*opt)); - } - + p = curr_sb->head; + curr_sb->head += pad + len; + m->size += pad + len; + /* Add ev. padding from prev. sync_conn */ + while (pad--) + *(p++) = 0; + + s = (union ip_vs_sync_conn *)p; + + /* Set message type & copy members */ + s->v4.type = (cp->af == AF_INET6 ? STYPE_F_INET6 : 0); + s->v4.ver_size = htons(len & SVER_MASK); /* Version 0 */ + s->v4.flags = htonl(cp->flags & ~IP_VS_CONN_F_HASHED); + s->v4.state = htons(cp->state); + s->v4.protocol = cp->protocol; + s->v4.cport = cp->cport; + s->v4.vport = cp->vport; + s->v4.dport = cp->dport; + s->v4.fwmark = htonl(cp->fwmark); + s->v4.timeout = htonl(cp->timeout / HZ); m->nr_conns++; - m->size += len; - curr_sb->head += len; - /* check if there is a space for next one */ - if (curr_sb->head+FULL_CONN_SIZE > curr_sb->end) { - sb_queue_tail(curr_sb); - curr_sb = NULL; +#ifdef CONFIG_IP_VS_IPV6 + if (cp->af == AF_INET6) { + p += sizeof(struct ip_vs_sync_v6); + ipv6_addr_copy(&s->v6.caddr, &cp->caddr.in6); + ipv6_addr_copy(&s->v6.vaddr, &cp->vaddr.in6); + ipv6_addr_copy(&s->v6.daddr, &cp->daddr.in6); + } else +#endif + { + p += sizeof(struct ip_vs_sync_v4); /* options ptr */ + s->v4.caddr = cp->caddr.ip; + s->v4.vaddr = cp->vaddr.ip; + s->v4.daddr = cp->daddr.ip; + } + if (cp->flags & IP_VS_CONN_F_SEQ_MASK) { + *(p++) = IPVS_OPT_SEQ_DATA; + *(p++) = sizeof(struct ip_vs_sync_conn_options); + hton_seq((struct ip_vs_seq *)p, &cp->in_seq); + p += sizeof(struct ip_vs_seq); + hton_seq((struct ip_vs_seq *)p, &cp->out_seq); + p += sizeof(struct ip_vs_seq); } + /* Handle pe data */ + if (cp->pe_data_len && cp->pe_data) { + *(p++) = IPVS_OPT_PE_DATA; + *(p++) = cp->pe_data_len; + memcpy(p, cp->pe_data, cp->pe_data_len); + p += cp->pe_data_len; + if (pe_name_len) { + /* Add PE_NAME */ + *(p++) = IPVS_OPT_PE_NAME; + *(p++) = pe_name_len; + memcpy(p, cp->pe->name, pe_name_len); + p += pe_name_len; + } + } + spin_unlock(&curr_sb_lock); +control: /* synchronize its controller if it has */ - if (cp->control) - ip_vs_sync_conn(cp->control); + cp = cp->control; + if (!cp) + return; + /* + * Reduce sync rate for templates + * i.e only increment in_pkts for Templates. + */ + if (cp->flags & IP_VS_CONN_F_TEMPLATE) { + int pkts = atomic_add_return(1, &cp->in_pkts); + + if (pkts % sysctl_ip_vs_sync_threshold[1] != 1) + return; + } + goto sloop; } /* @@ -596,7 +699,7 @@ static void ip_vs_proc_conn(struct ip_vs_conn_param *param, unsigned flags, */ 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_v0 *m = (struct ip_vs_sync_mesg_v0 *)buffer; struct ip_vs_sync_conn_v0 *s; struct ip_vs_sync_conn_options *opt; struct ip_vs_protocol *pp; @@ -604,7 +707,7 @@ static void ip_vs_process_message_v0(const char *buffer, const size_t buflen) char *p; int i; - p = (char *)buffer + sizeof(struct ip_vs_sync_mesg); + p = (char *)buffer + sizeof(struct ip_vs_sync_mesg_v0); for (i=0; inr_conns; i++) { unsigned flags, state; @@ -848,11 +951,11 @@ out: */ 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; + struct ip_vs_sync_mesg *m2 = (struct ip_vs_sync_mesg *)buffer; __u8 *p, *msg_end; - unsigned int i, nr_conns; + int i, nr_conns; - if (buflen < sizeof(struct ip_vs_sync_mesg)) { + if (buflen < sizeof(struct ip_vs_sync_mesg_v0)) { IP_VS_DBG(2, "BACKUP, message header too short\n"); return; } @@ -872,7 +975,7 @@ static void ip_vs_process_message(__u8 *buffer, const size_t buflen) if ((m2->version == SYNC_PROTO_VER) && (m2->reserved == 0) && (m2->spare == 0)) { - msg_end = buffer + sizeof(struct ip_vs_sync_mesg_v2); + msg_end = buffer + sizeof(struct ip_vs_sync_mesg); nr_conns = m2->nr_conns; for (i=0; i