diff options
-rw-r--r-- | include/net/ip_vs.h | 16 | ||||
-rw-r--r-- | net/netfilter/ipvs/Kconfig | 4 | ||||
-rw-r--r-- | net/netfilter/ipvs/ip_vs_conn.c | 42 | ||||
-rw-r--r-- | net/netfilter/ipvs/ip_vs_ctl.c | 8 |
4 files changed, 44 insertions, 26 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index 8dc3296b7bea..a816c37417bb 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -26,6 +26,11 @@ #include <linux/ipv6.h> /* for struct ipv6hdr */ #include <net/ipv6.h> /* for ipv6_addr_copy */ + +/* Connections' size value needed by ip_vs_ctl.c */ +extern int ip_vs_conn_tab_size; + + struct ip_vs_iphdr { int len; __u8 protocol; @@ -592,17 +597,6 @@ extern void ip_vs_init_hash_table(struct list_head *table, int rows); * (from ip_vs_conn.c) */ -/* - * IPVS connection entry hash table - */ -#ifndef CONFIG_IP_VS_TAB_BITS -#define CONFIG_IP_VS_TAB_BITS 12 -#endif - -#define IP_VS_CONN_TAB_BITS CONFIG_IP_VS_TAB_BITS -#define IP_VS_CONN_TAB_SIZE (1 << IP_VS_CONN_TAB_BITS) -#define IP_VS_CONN_TAB_MASK (IP_VS_CONN_TAB_SIZE - 1) - enum { IP_VS_DIR_INPUT = 0, IP_VS_DIR_OUTPUT, diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig index 79a698052218..c71e543d2549 100644 --- a/net/netfilter/ipvs/Kconfig +++ b/net/netfilter/ipvs/Kconfig @@ -68,6 +68,10 @@ config IP_VS_TAB_BITS each hash entry uses 8 bytes, so you can estimate how much memory is needed for your box. + You can overwrite this number setting conn_tab_bits module parameter + or by appending ip_vs.conn_tab_bits=? to the kernel command line + if IP VS was compiled built-in. + comment "IPVS transport protocol load balancing support" config IP_VS_PROTO_TCP diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c index 27c30cf933da..60bb41a8d8d4 100644 --- a/net/netfilter/ipvs/ip_vs_conn.c +++ b/net/netfilter/ipvs/ip_vs_conn.c @@ -40,6 +40,21 @@ #include <net/ip_vs.h> +#ifndef CONFIG_IP_VS_TAB_BITS +#define CONFIG_IP_VS_TAB_BITS 12 +#endif + +/* + * Connection hash size. Default is what was selected at compile time. +*/ +int ip_vs_conn_tab_bits = CONFIG_IP_VS_TAB_BITS; +module_param_named(conn_tab_bits, ip_vs_conn_tab_bits, int, 0444); +MODULE_PARM_DESC(conn_tab_bits, "Set connections' hash size"); + +/* size and mask values */ +int ip_vs_conn_tab_size; +int ip_vs_conn_tab_mask; + /* * Connection hash table: for input and output packets lookups of IPVS */ @@ -125,11 +140,11 @@ static unsigned int ip_vs_conn_hashkey(int af, unsigned proto, if (af == AF_INET6) return jhash_3words(jhash(addr, 16, ip_vs_conn_rnd), (__force u32)port, proto, ip_vs_conn_rnd) - & IP_VS_CONN_TAB_MASK; + & ip_vs_conn_tab_mask; #endif return jhash_3words((__force u32)addr->ip, (__force u32)port, proto, ip_vs_conn_rnd) - & IP_VS_CONN_TAB_MASK; + & ip_vs_conn_tab_mask; } @@ -760,7 +775,7 @@ static void *ip_vs_conn_array(struct seq_file *seq, loff_t pos) int idx; struct ip_vs_conn *cp; - for(idx = 0; idx < IP_VS_CONN_TAB_SIZE; idx++) { + for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { ct_read_lock_bh(idx); list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) { if (pos-- == 0) { @@ -797,7 +812,7 @@ static void *ip_vs_conn_seq_next(struct seq_file *seq, void *v, loff_t *pos) idx = l - ip_vs_conn_tab; ct_read_unlock_bh(idx); - while (++idx < IP_VS_CONN_TAB_SIZE) { + while (++idx < ip_vs_conn_tab_size) { ct_read_lock_bh(idx); list_for_each_entry(cp, &ip_vs_conn_tab[idx], c_list) { seq->private = &ip_vs_conn_tab[idx]; @@ -976,8 +991,8 @@ void ip_vs_random_dropentry(void) /* * Randomly scan 1/32 of the whole table every second */ - for (idx = 0; idx < (IP_VS_CONN_TAB_SIZE>>5); idx++) { - unsigned hash = net_random() & IP_VS_CONN_TAB_MASK; + for (idx = 0; idx < (ip_vs_conn_tab_size>>5); idx++) { + unsigned hash = net_random() & ip_vs_conn_tab_mask; /* * Lock is actually needed in this loop. @@ -1029,7 +1044,7 @@ static void ip_vs_conn_flush(void) struct ip_vs_conn *cp; flush_again: - for (idx=0; idx<IP_VS_CONN_TAB_SIZE; idx++) { + for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { /* * Lock is actually needed in this loop. */ @@ -1060,10 +1075,15 @@ int __init ip_vs_conn_init(void) { int idx; + /* Compute size and mask */ + ip_vs_conn_tab_size = 1 << ip_vs_conn_tab_bits; + ip_vs_conn_tab_mask = ip_vs_conn_tab_size - 1; + /* * Allocate the connection hash table and initialize its list heads */ - ip_vs_conn_tab = vmalloc(IP_VS_CONN_TAB_SIZE*sizeof(struct list_head)); + ip_vs_conn_tab = vmalloc(ip_vs_conn_tab_size * + sizeof(struct list_head)); if (!ip_vs_conn_tab) return -ENOMEM; @@ -1078,12 +1098,12 @@ int __init ip_vs_conn_init(void) pr_info("Connection hash table configured " "(size=%d, memory=%ldKbytes)\n", - IP_VS_CONN_TAB_SIZE, - (long)(IP_VS_CONN_TAB_SIZE*sizeof(struct list_head))/1024); + ip_vs_conn_tab_size, + (long)(ip_vs_conn_tab_size*sizeof(struct list_head))/1024); IP_VS_DBG(0, "Each connection entry needs %Zd bytes at least\n", sizeof(struct ip_vs_conn)); - for (idx = 0; idx < IP_VS_CONN_TAB_SIZE; idx++) { + for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { INIT_LIST_HEAD(&ip_vs_conn_tab[idx]); } diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c index 6bde12da2fe0..93420ea8b0bc 100644 --- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -1843,7 +1843,7 @@ static int ip_vs_info_seq_show(struct seq_file *seq, void *v) if (v == SEQ_START_TOKEN) { seq_printf(seq, "IP Virtual Server version %d.%d.%d (size=%d)\n", - NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); + NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size); seq_puts(seq, "Prot LocalAddress:Port Scheduler Flags\n"); seq_puts(seq, @@ -2374,7 +2374,7 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) char buf[64]; sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)", - NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE); + NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size); if (copy_to_user(user, buf, strlen(buf)+1) != 0) { ret = -EFAULT; goto out; @@ -2387,7 +2387,7 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) { struct ip_vs_getinfo info; info.version = IP_VS_VERSION_CODE; - info.size = IP_VS_CONN_TAB_SIZE; + info.size = ip_vs_conn_tab_size; info.num_services = ip_vs_num_services; if (copy_to_user(user, &info, sizeof(info)) != 0) ret = -EFAULT; @@ -3231,7 +3231,7 @@ static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info) case IPVS_CMD_GET_INFO: NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE); NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE, - IP_VS_CONN_TAB_SIZE); + ip_vs_conn_tab_size); break; } |