diff options
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 47 |
1 files changed, 41 insertions, 6 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 5490c285668b..9b8a6db7a66b 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -39,6 +39,7 @@ static u32 u32_max_div_HZ = UINT_MAX / HZ; static int one_day_secs = 24 * 3600; static u32 fib_multipath_hash_fields_all_mask __maybe_unused = FIB_MULTIPATH_HASH_FIELD_ALL_MASK; +static unsigned int tcp_child_ehash_entries_max = 16 * 1024 * 1024; /* obsolete */ static int sysctl_tcp_low_latency __read_mostly; @@ -382,6 +383,29 @@ static int proc_tcp_available_ulp(struct ctl_table *ctl, return ret; } +static int proc_tcp_ehash_entries(struct ctl_table *table, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + struct net *net = container_of(table->data, struct net, + ipv4.sysctl_tcp_child_ehash_entries); + struct inet_hashinfo *hinfo = net->ipv4.tcp_death_row.hashinfo; + int tcp_ehash_entries; + struct ctl_table tbl; + + tcp_ehash_entries = hinfo->ehash_mask + 1; + + /* A negative number indicates that the child netns + * shares the global ehash. + */ + if (!net_eq(net, &init_net) && !hinfo->pernet) + tcp_ehash_entries *= -1; + + tbl.data = &tcp_ehash_entries; + tbl.maxlen = sizeof(int); + + return proc_dointvec(&tbl, write, buffer, lenp, ppos); +} + #ifdef CONFIG_IP_ROUTE_MULTIPATH static int proc_fib_multipath_hash_policy(struct ctl_table *table, int write, void *buffer, size_t *lenp, @@ -530,10 +554,9 @@ static struct ctl_table ipv4_table[] = { }; static struct ctl_table ipv4_net_table[] = { - /* tcp_max_tw_buckets must be first in this table. */ { .procname = "tcp_max_tw_buckets", -/* .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, */ + .data = &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec @@ -1322,6 +1345,21 @@ static struct ctl_table ipv4_net_table[] = { .extra2 = SYSCTL_ONE, }, { + .procname = "tcp_ehash_entries", + .data = &init_net.ipv4.sysctl_tcp_child_ehash_entries, + .mode = 0444, + .proc_handler = proc_tcp_ehash_entries, + }, + { + .procname = "tcp_child_ehash_entries", + .data = &init_net.ipv4.sysctl_tcp_child_ehash_entries, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_douintvec_minmax, + .extra1 = SYSCTL_ZERO, + .extra2 = &tcp_child_ehash_entries_max, + }, + { .procname = "udp_rmem_min", .data = &init_net.ipv4.sysctl_udp_rmem_min, .maxlen = sizeof(init_net.ipv4.sysctl_udp_rmem_min), @@ -1361,8 +1399,7 @@ static __net_init int ipv4_sysctl_init_net(struct net *net) if (!table) goto err_alloc; - /* skip first entry (sysctl_max_tw_buckets) */ - for (i = 1; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) { + for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) { if (table[i].data) { /* Update the variables to point into * the current struct net @@ -1377,8 +1414,6 @@ static __net_init int ipv4_sysctl_init_net(struct net *net) } } - table[0].data = &net->ipv4.tcp_death_row->sysctl_max_tw_buckets; - net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); if (!net->ipv4.ipv4_hdr) goto err_reg; |