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path: root/net/ipv4/sysctl_net_ipv4.c
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Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 15061b314411..dfcf47f10f88 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -129,6 +129,67 @@ static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
129 return ret; 129 return ret;
130} 130}
131 131
132static int proc_tcp_available_congestion_control(ctl_table *ctl,
133 int write, struct file * filp,
134 void __user *buffer, size_t *lenp,
135 loff_t *ppos)
136{
137 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX, };
138 int ret;
139
140 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
141 if (!tbl.data)
142 return -ENOMEM;
143 tcp_get_available_congestion_control(tbl.data, TCP_CA_BUF_MAX);
144 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
145 kfree(tbl.data);
146 return ret;
147}
148
149static int proc_allowed_congestion_control(ctl_table *ctl,
150 int write, struct file * filp,
151 void __user *buffer, size_t *lenp,
152 loff_t *ppos)
153{
154 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
155 int ret;
156
157 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
158 if (!tbl.data)
159 return -ENOMEM;
160
161 tcp_get_allowed_congestion_control(tbl.data, tbl.maxlen);
162 ret = proc_dostring(&tbl, write, filp, buffer, lenp, ppos);
163 if (write && ret == 0)
164 ret = tcp_set_allowed_congestion_control(tbl.data);
165 kfree(tbl.data);
166 return ret;
167}
168
169static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
170 int nlen, void __user *oldval,
171 size_t __user *oldlenp,
172 void __user *newval, size_t newlen,
173 void **context)
174{
175 ctl_table tbl = { .maxlen = TCP_CA_BUF_MAX };
176 int ret;
177
178 tbl.data = kmalloc(tbl.maxlen, GFP_USER);
179 if (!tbl.data)
180 return -ENOMEM;
181
182 tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
183 ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen,
184 context);
185 if (ret == 0 && newval && newlen)
186 ret = tcp_set_allowed_congestion_control(tbl.data);
187 kfree(tbl.data);
188
189 return ret;
190
191}
192
132ctl_table ipv4_table[] = { 193ctl_table ipv4_table[] = {
133 { 194 {
134 .ctl_name = NET_IPV4_TCP_TIMESTAMPS, 195 .ctl_name = NET_IPV4_TCP_TIMESTAMPS,
@@ -731,6 +792,21 @@ ctl_table ipv4_table[] = {
731 .proc_handler = &proc_dointvec, 792 .proc_handler = &proc_dointvec,
732 }, 793 },
733#endif /* CONFIG_NETLABEL */ 794#endif /* CONFIG_NETLABEL */
795 {
796 .ctl_name = NET_TCP_AVAIL_CONG_CONTROL,
797 .procname = "tcp_available_congestion_control",
798 .maxlen = TCP_CA_BUF_MAX,
799 .mode = 0444,
800 .proc_handler = &proc_tcp_available_congestion_control,
801 },
802 {
803 .ctl_name = NET_TCP_ALLOWED_CONG_CONTROL,
804 .procname = "tcp_allowed_congestion_control",
805 .maxlen = TCP_CA_BUF_MAX,
806 .mode = 0644,
807 .proc_handler = &proc_allowed_congestion_control,
808 .strategy = &strategy_allowed_congestion_control,
809 },
734 { .ctl_name = 0 } 810 { .ctl_name = 0 }
735}; 811};
736 812