diff options
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 90b26beb84d4..4fca1aa4c505 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -138,6 +138,21 @@ static int ipv4_ping_group_range(ctl_table *table, int write, return ret; } +/* Validate changes from /proc interface. */ +static int proc_tcp_default_init_rwnd(ctl_table *ctl, int write, + void __user *buffer, + size_t *lenp, loff_t *ppos) +{ + int old_value = *(int *)ctl->data; + int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); + int new_value = *(int *)ctl->data; + + if (write && ret == 0 && (new_value < 3 || new_value > 100)) + *(int *)ctl->data = old_value; + + return ret; +} + static int proc_tcp_congestion_control(ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { @@ -737,7 +752,7 @@ static struct ctl_table ipv4_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, - { + { .procname = "tcp_thin_dupack", .data = &sysctl_tcp_thin_dupack, .maxlen = sizeof(int), @@ -763,6 +778,13 @@ static struct ctl_table ipv4_table[] = { .extra2 = &gso_max_segs, }, { + .procname = "tcp_default_init_rwnd", + .data = &sysctl_tcp_default_init_rwnd, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_tcp_default_init_rwnd + }, + { .procname = "udp_mem", .data = &sysctl_udp_mem, .maxlen = sizeof(sysctl_udp_mem), |