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    Subject[PATCH 10/24] sysctl: cookie: share ip6_ctl_table, ipv6_icmp_table and ipv6_route_table between nets
    Date
    Signed-off-by: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
    ---
    include/net/ipv6.h | 6 +---
    net/ipv6/icmp.c | 17 +-----------
    net/ipv6/route.c | 58 +++++++++++------------------------------
    net/ipv6/sysctl_net_ipv6.c | 61 ++++++--------------------------------------
    4 files changed, 28 insertions(+), 114 deletions(-)

    diff --git a/include/net/ipv6.h b/include/net/ipv6.h
    index 34200f9..bd73439 100644
    --- a/include/net/ipv6.h
    +++ b/include/net/ipv6.h
    @@ -656,11 +656,9 @@ static inline int snmp6_unregister_dev(struct inet6_dev *idev) { return 0; }
    #endif

    #ifdef CONFIG_SYSCTL
    -extern ctl_table ipv6_route_table_template[];
    -extern ctl_table ipv6_icmp_table_template[];
    +extern ctl_table ipv6_route_table[];
    +extern ctl_table ipv6_icmp_table[];

    -extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
    -extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
    extern int ipv6_sysctl_register(void);
    extern void ipv6_sysctl_unregister(void);
    extern int ipv6_static_sysctl_register(void);
    diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
    index 83cb4f9..26cdb9b 100644
    --- a/net/ipv6/icmp.c
    +++ b/net/ipv6/icmp.c
    @@ -954,29 +954,16 @@ int icmpv6_err_convert(u8 type, u8 code, int *err)
    EXPORT_SYMBOL(icmpv6_err_convert);

    #ifdef CONFIG_SYSCTL
    -ctl_table ipv6_icmp_table_template[] = {
    +ctl_table ipv6_icmp_table[] = {
    {
    .procname = "ratelimit",
    .data = &init_net.ipv6.sysctl.icmpv6_time,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec_ms_jiffies,
    + .proc_handler = netns_proc_dointvec_ms_jiffies,
    },
    { },
    };

    -struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
    -{
    - struct ctl_table *table;
    -
    - table = kmemdup(ipv6_icmp_table_template,
    - sizeof(ipv6_icmp_table_template),
    - GFP_KERNEL);
    -
    - if (table)
    - table[0].data = &net->ipv6.sysctl.icmpv6_time;
    -
    - return table;
    -}
    #endif

    diff --git a/net/ipv6/route.c b/net/ipv6/route.c
    index 48ec0b7..a110204 100644
    --- a/net/ipv6/route.c
    +++ b/net/ipv6/route.c
    @@ -2592,120 +2592,94 @@ static const struct file_operations rt6_stats_seq_fops = {

    #ifdef CONFIG_SYSCTL

    -static
    -int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, void __user *buffer,
    - size_t *lenp, loff_t *ppos, void *cookie)
    +static int netns_ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write,
    + void __user *buffer, size_t *lenp,
    + loff_t *ppos, void *cookie)
    {
    - struct net *net;
    - int delay;
    + struct net *net = (struct net *) cookie;
    + int delay = net->ipv6.sysctl.flush_delay;
    if (!write)
    return -EINVAL;

    - net = (struct net *)ctl->extra1;
    - delay = net->ipv6.sysctl.flush_delay;
    proc_dointvec(ctl, write, buffer, lenp, ppos, NULL);
    fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net);
    return 0;
    }

    -ctl_table ipv6_route_table_template[] = {
    +ctl_table ipv6_route_table[] = {
    {
    .procname = "flush",
    .data = &init_net.ipv6.sysctl.flush_delay,
    .maxlen = sizeof(int),
    .mode = 0200,
    - .proc_handler = ipv6_sysctl_rtcache_flush
    + .proc_handler = netns_ipv6_sysctl_rtcache_flush,
    },
    {
    .procname = "gc_thresh",
    .data = &ip6_dst_ops_template.gc_thresh,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec,
    + .proc_handler = netns_proc_dointvec,
    },
    {
    .procname = "max_size",
    .data = &init_net.ipv6.sysctl.ip6_rt_max_size,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec,
    + .proc_handler = netns_proc_dointvec,
    },
    {
    .procname = "gc_min_interval",
    .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec_jiffies,
    + .proc_handler = netns_proc_dointvec_jiffies,
    },
    {
    .procname = "gc_timeout",
    .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec_jiffies,
    + .proc_handler = netns_proc_dointvec_jiffies,
    },
    {
    .procname = "gc_interval",
    .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec_jiffies,
    + .proc_handler = netns_proc_dointvec_jiffies,
    },
    {
    .procname = "gc_elasticity",
    .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec,
    + .proc_handler = netns_proc_dointvec,
    },
    {
    .procname = "mtu_expires",
    .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec_jiffies,
    + .proc_handler = netns_proc_dointvec_jiffies,
    },
    {
    .procname = "min_adv_mss",
    .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec,
    + .proc_handler = netns_proc_dointvec,
    },
    {
    .procname = "gc_min_interval_ms",
    .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec_ms_jiffies,
    + .proc_handler = netns_proc_dointvec_ms_jiffies,
    },
    { }
    };

    -struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net)
    -{
    - struct ctl_table *table;
    -
    - table = kmemdup(ipv6_route_table_template,
    - sizeof(ipv6_route_table_template),
    - GFP_KERNEL);
    -
    - if (table) {
    - table[0].data = &net->ipv6.sysctl.flush_delay;
    - table[0].extra1 = net;
    - table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh;
    - table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
    - table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
    - table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
    - table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
    - table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
    - table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
    - table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
    - table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
    - }
    -
    - return table;
    -}
    #endif

    static int __net_init ip6_route_net_init(struct net *net)
    diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
    index 6dcf5e7..1b6f6fd 100644
    --- a/net/ipv6/sysctl_net_ipv6.c
    +++ b/net/ipv6/sysctl_net_ipv6.c
    @@ -27,25 +27,25 @@ static ctl_table ipv6_static_skeleton[] = {
    { }
    };

    -static ctl_table ipv6_table_template[] = {
    +static ctl_table ipv6_table[] = {
    {
    .procname = "route",
    .maxlen = 0,
    .mode = 0555,
    - .child = ipv6_route_table_template
    + .child = ipv6_route_table
    },
    {
    .procname = "icmp",
    .maxlen = 0,
    .mode = 0555,
    - .child = ipv6_icmp_table_template
    + .child = ipv6_icmp_table
    },
    {
    .procname = "bindv6only",
    .data = &init_net.ipv6.sysctl.bindv6only,
    .maxlen = sizeof(int),
    .mode = 0644,
    - .proc_handler = proc_dointvec
    + .proc_handler = netns_proc_dointvec,
    },
    { }
    };
    @@ -70,62 +70,17 @@ EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);

    static int __net_init ipv6_sysctl_net_init(struct net *net)
    {
    - struct ctl_table *ipv6_table;
    - struct ctl_table *ipv6_route_table;
    - struct ctl_table *ipv6_icmp_table;
    - int err;
    -
    - err = -ENOMEM;
    - ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
    - GFP_KERNEL);
    - if (!ipv6_table)
    - goto out;
    -
    - ipv6_route_table = ipv6_route_sysctl_init(net);
    - if (!ipv6_route_table)
    - goto out_ipv6_table;
    - ipv6_table[0].child = ipv6_route_table;
    -
    - ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
    - if (!ipv6_icmp_table)
    - goto out_ipv6_route_table;
    - ipv6_table[1].child = ipv6_icmp_table;
    -
    - ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
    -
    - net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
    - ipv6_table);
    + net->ipv6.sysctl.table = register_net_sysctl_table(net,
    + net_ipv6_ctl_path, ipv6_table);
    if (!net->ipv6.sysctl.table)
    - goto out_ipv6_icmp_table;
    -
    - err = 0;
    -out:
    - return err;
    + return -ENOMEM;

    -out_ipv6_icmp_table:
    - kfree(ipv6_icmp_table);
    -out_ipv6_route_table:
    - kfree(ipv6_route_table);
    -out_ipv6_table:
    - kfree(ipv6_table);
    - goto out;
    + return 0;
    }

    static void __net_exit ipv6_sysctl_net_exit(struct net *net)
    {
    - struct ctl_table *ipv6_table;
    - struct ctl_table *ipv6_route_table;
    - struct ctl_table *ipv6_icmp_table;
    -
    - ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
    - ipv6_route_table = ipv6_table[0].child;
    - ipv6_icmp_table = ipv6_table[1].child;
    -
    unregister_net_sysctl_table(net->ipv6.sysctl.table);
    -
    - kfree(ipv6_table);
    - kfree(ipv6_route_table);
    - kfree(ipv6_icmp_table);
    }

    static struct pernet_operations ipv6_sysctl_net_ops = {
    --
    1.7.5.rc0


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