From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/net/core/sysctl_net_core.c | 138 +++++++++++++++++++++++++++++----------------
1 files changed, 88 insertions(+), 50 deletions(-)
diff --git a/kernel/net/core/sysctl_net_core.c b/kernel/net/core/sysctl_net_core.c
index f6ee3f6..0dfe9f2 100644
--- a/kernel/net/core/sysctl_net_core.c
+++ b/kernel/net/core/sysctl_net_core.c
@@ -22,9 +22,8 @@
#include <net/busy_poll.h>
#include <net/pkt_sched.h>
-static int zero = 0;
-static int one = 1;
-static int two __maybe_unused = 2;
+static int two = 2;
+static int three = 3;
static int min_sndbuf = SOCK_MIN_SNDBUF;
static int min_rcvbuf = SOCK_MIN_RCVBUF;
static int max_skb_frags = MAX_SKB_FRAGS;
@@ -36,9 +35,19 @@
int sysctl_fb_tunnels_only_for_init_net __read_mostly = 0;
EXPORT_SYMBOL(sysctl_fb_tunnels_only_for_init_net);
+/* 0 - Keep current behavior:
+ * IPv4: inherit all current settings from init_net
+ * IPv6: reset all settings to default
+ * 1 - Both inherit all current settings from init_net
+ * 2 - Both reset all settings to default
+ * 3 - Both inherit all settings from current netns
+ */
+int sysctl_devconf_inherit_init_net __read_mostly;
+EXPORT_SYMBOL(sysctl_devconf_inherit_init_net);
+
#ifdef CONFIG_RPS
static int rps_sock_flow_sysctl(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
unsigned int orig_size, size;
int ret, i;
@@ -86,12 +95,12 @@
if (sock_table != orig_sock_table) {
rcu_assign_pointer(rps_sock_flow_table, sock_table);
if (sock_table) {
- static_key_slow_inc(&rps_needed);
- static_key_slow_inc(&rfs_needed);
+ static_branch_inc(&rps_needed);
+ static_branch_inc(&rfs_needed);
}
if (orig_sock_table) {
- static_key_slow_dec(&rps_needed);
- static_key_slow_dec(&rfs_needed);
+ static_branch_dec(&rps_needed);
+ static_branch_dec(&rfs_needed);
synchronize_rcu();
vfree(orig_sock_table);
}
@@ -108,8 +117,7 @@
static DEFINE_MUTEX(flow_limit_update_mutex);
static int flow_limit_cpu_sysctl(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
struct sd_flow_limit *cur;
struct softnet_data *sd;
@@ -120,7 +128,7 @@
return -ENOMEM;
if (write) {
- ret = cpumask_parse_user(buffer, *lenp, mask);
+ ret = cpumask_parse(buffer, mask);
if (ret)
goto done;
@@ -173,10 +181,7 @@
}
if (len < *lenp)
kbuf[len++] = '\n';
- if (copy_to_user(buffer, kbuf, len)) {
- ret = -EFAULT;
- goto done;
- }
+ memcpy(buffer, kbuf, len);
*lenp = len;
*ppos += len;
}
@@ -187,8 +192,7 @@
}
static int flow_limit_table_len_sysctl(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
unsigned int old, *ptr;
int ret;
@@ -210,7 +214,7 @@
#ifdef CONFIG_NET_SCHED
static int set_default_qdisc(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
char id[IFNAMSIZ];
struct ctl_table tbl = {
@@ -229,23 +233,25 @@
#endif
static int proc_do_dev_weight(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
- int ret;
+ static DEFINE_MUTEX(dev_weight_mutex);
+ int ret, weight;
+ mutex_lock(&dev_weight_mutex);
ret = proc_dointvec(table, write, buffer, lenp, ppos);
- if (ret != 0)
- return ret;
-
- dev_rx_weight = weight_p * dev_weight_rx_bias;
- dev_tx_weight = weight_p * dev_weight_tx_bias;
+ if (!ret && write) {
+ weight = READ_ONCE(weight_p);
+ WRITE_ONCE(dev_rx_weight, weight * dev_weight_rx_bias);
+ WRITE_ONCE(dev_tx_weight, weight * dev_weight_tx_bias);
+ }
+ mutex_unlock(&dev_weight_mutex);
return ret;
}
-#ifdef CONFIG_ETHTOOL
static int proc_do_rss_key(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table fake_table;
char buf[NETDEV_RSS_KEY_LEN * 3];
@@ -255,11 +261,10 @@
fake_table.maxlen = sizeof(buf);
return proc_dostring(&fake_table, write, buffer, lenp, ppos);
}
-#endif
#ifdef CONFIG_BPF_JIT
static int proc_dointvec_minmax_bpf_enable(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
+ void *buffer, size_t *lenp,
loff_t *ppos)
{
int ret, jit_enable = *(int *)table->data;
@@ -286,8 +291,7 @@
# ifdef CONFIG_HAVE_EBPF_JIT
static int
proc_dointvec_minmax_bpf_restricted(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -298,8 +302,7 @@
static int
proc_dolongvec_minmax_bpf_restricted(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -370,7 +373,6 @@
.mode = 0644,
.proc_handler = proc_dointvec
},
-#ifdef CONFIG_ETHTOOL
{
.procname = "netdev_rss_key",
.data = &netdev_rss_key,
@@ -378,7 +380,6 @@
.mode = 0444,
.proc_handler = proc_do_rss_key,
},
-#endif
#ifdef CONFIG_BPF_JIT
{
.procname = "bpf_jit_enable",
@@ -387,10 +388,10 @@
.mode = 0644,
.proc_handler = proc_dointvec_minmax_bpf_enable,
# ifdef CONFIG_BPF_JIT_ALWAYS_ON
- .extra1 = &one,
- .extra2 = &one,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = SYSCTL_ONE,
# else
- .extra1 = &zero,
+ .extra1 = SYSCTL_ZERO,
.extra2 = &two,
# endif
},
@@ -401,7 +402,7 @@
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = proc_dointvec_minmax_bpf_restricted,
- .extra1 = &zero,
+ .extra1 = SYSCTL_ZERO,
.extra2 = &two,
},
{
@@ -410,8 +411,8 @@
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = proc_dointvec_minmax_bpf_restricted,
- .extra1 = &zero,
- .extra2 = &one,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
},
# endif
{
@@ -458,8 +459,8 @@
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE
},
#ifdef CONFIG_RPS
{
@@ -490,7 +491,7 @@
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
+ .extra1 = SYSCTL_ZERO,
},
{
.procname = "busy_read",
@@ -498,7 +499,7 @@
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
+ .extra1 = SYSCTL_ZERO,
},
#endif
#ifdef CONFIG_NET_SCHED
@@ -530,7 +531,7 @@
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &one,
+ .extra1 = SYSCTL_ONE,
.extra2 = &max_skb_frags,
},
{
@@ -539,7 +540,7 @@
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
+ .extra1 = SYSCTL_ZERO,
},
{
.procname = "fb_tunnels_only_for_init_net",
@@ -547,8 +548,32 @@
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+ {
+ .procname = "devconf_inherit_init_net",
+ .data = &sysctl_devconf_inherit_init_net,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &three,
+ },
+ {
+ .procname = "high_order_alloc_disable",
+ .data = &net_high_order_alloc_disable_key.key,
+ .maxlen = sizeof(net_high_order_alloc_disable_key),
+ .mode = 0644,
+ .proc_handler = proc_do_static_key,
+ },
+ {
+ .procname = "gro_normal_batch",
+ .data = &gro_normal_batch,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
},
{ }
};
@@ -559,12 +584,25 @@
.data = &init_net.core.sysctl_somaxconn,
.maxlen = sizeof(int),
.mode = 0644,
- .extra1 = &zero,
+ .extra1 = SYSCTL_ZERO,
.proc_handler = proc_dointvec_minmax
},
{ }
};
+static int __init fb_tunnels_only_for_init_net_sysctl_setup(char *str)
+{
+ /* fallback tunnels for initns only */
+ if (!strncmp(str, "initns", 6))
+ sysctl_fb_tunnels_only_for_init_net = 1;
+ /* no fallback tunnels anywhere */
+ else if (!strncmp(str, "none", 4))
+ sysctl_fb_tunnels_only_for_init_net = 2;
+
+ return 1;
+}
+__setup("fb_tunnels=", fb_tunnels_only_for_init_net_sysctl_setup);
+
static __net_init int sysctl_core_net_init(struct net *net)
{
struct ctl_table *tbl;
--
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