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Subject[PATCH] IPv4/IPv6: update sysctl files

Now the following sysctl files in /proc/sys/net/ipv4 are used by
both IPv4 and IPv6.
tcp_mem tcp_rmem tcp_wmem
udp_mem udp_rmem_min udp_wmem_min
Putting them in /proc/sys/net/ipv4 is not a good choice.

So move tcp_mem tcp_rmem tcp_wmem to /proc/sys/net/tcp and
move udp_mem udp_rmem_min udp_wmem_min to /poc/sys/net/udp.

Signed-off-by: Shen Feng <shen@cn.fujitsu.com>
---
net/ipv4/sysctl_net_ipv4.c | 95 ++++++++++++++++++++++++++++++-------------
1 files changed, 66 insertions(+), 29 deletions(-)
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 4710d21..a520011 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -503,30 +503,6 @@ static struct ctl_table ipv4_table[] = {
.proc_handler = proc_dointvec
},
{
- .ctl_name = NET_TCP_MEM,
- .procname = "tcp_mem",
- .data = &sysctl_tcp_mem,
- .maxlen = sizeof(sysctl_tcp_mem),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
- .ctl_name = NET_TCP_WMEM,
- .procname = "tcp_wmem",
- .data = &sysctl_tcp_wmem,
- .maxlen = sizeof(sysctl_tcp_wmem),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
- .ctl_name = NET_TCP_RMEM,
- .procname = "tcp_rmem",
- .data = &sysctl_tcp_rmem,
- .maxlen = sizeof(sysctl_tcp_rmem),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
.ctl_name = NET_TCP_APP_WIN,
.procname = "tcp_app_win",
.data = &sysctl_tcp_app_win,
@@ -712,6 +688,38 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
+ { .ctl_name = 0 }
+};
+
+static struct ctl_table proc_tcp_table[] = {
+ {
+ .ctl_name = NET_TCP_MEM,
+ .procname = "tcp_mem",
+ .data = &sysctl_tcp_mem,
+ .maxlen = sizeof(sysctl_tcp_mem),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
+ .ctl_name = NET_TCP_WMEM,
+ .procname = "tcp_wmem",
+ .data = &sysctl_tcp_wmem,
+ .maxlen = sizeof(sysctl_tcp_wmem),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
+ .ctl_name = NET_TCP_RMEM,
+ .procname = "tcp_rmem",
+ .data = &sysctl_tcp_rmem,
+ .maxlen = sizeof(sysctl_tcp_rmem),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {},
+};
+
+static struct ctl_table proc_udp_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "udp_mem",
@@ -742,7 +750,7 @@ static struct ctl_table ipv4_table[] = {
.strategy = sysctl_intvec,
.extra1 = &zero
},
- { .ctl_name = 0 }
+ {},
};

static struct ctl_table ipv4_net_table[] = {
@@ -813,6 +821,20 @@ struct ctl_path net_ipv4_ctl_path[] = {
};
EXPORT_SYMBOL_GPL(net_ipv4_ctl_path);

+struct ctl_path net_tcp_ctl_path[] = {
+ { .procname = "net", .ctl_name = CTL_NET, },
+ { .procname = "tcp", .ctl_name = CTL_UNNUMBERED, },
+ {},
+};
+EXPORT_SYMBOL_GPL(net_tcp_ctl_path);
+
+struct ctl_path net_udp_ctl_path[] = {
+ { .procname = "net", .ctl_name = CTL_NET, },
+ { .procname = "udp", .ctl_name = CTL_UNNUMBERED, },
+ {},
+};
+EXPORT_SYMBOL_GPL(net_udp_ctl_path);
+
static __net_init int ipv4_sysctl_init_net(struct net *net)
{
struct ctl_table *table;
@@ -871,14 +893,29 @@ static __net_initdata struct pernet_operations ipv4_sysctl_ops = {

static __init int sysctl_ipv4_init(void)
{
- struct ctl_table_header *hdr;
+ struct ctl_table_header *hdr_ipv4, *hdr_tcp, *hdr_udp;
+
+ hdr_ipv4 = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table);
+ if (hdr_ipv4 == NULL)
+ return -ENOMEM;

- hdr = register_sysctl_paths(net_ipv4_ctl_path, ipv4_table);
- if (hdr == NULL)
+ hdr_tcp = register_sysctl_paths(net_tcp_ctl_path, proc_tcp_table);
+ if (hdr_tcp == NULL) {
+ unregister_sysctl_table(hdr_ipv4);
return -ENOMEM;
+ }
+
+ hdr_udp = register_sysctl_paths(net_udp_ctl_path, proc_udp_table);
+ if (hdr_udp == NULL) {
+ unregister_sysctl_table(hdr_ipv4);
+ unregister_sysctl_table(hdr_tcp);
+ return -ENOMEM;
+ }

if (register_pernet_subsys(&ipv4_sysctl_ops)) {
- unregister_sysctl_table(hdr);
+ unregister_sysctl_table(hdr_ipv4);
+ unregister_sysctl_table(hdr_tcp);
+ unregister_sysctl_table(hdr_udp);
return -ENOMEM;
}

--
1.6.0.6



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