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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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a0a53c8ba9
Recently David Miller and Herbert Xu pointed out that struct net becomes overbloated and un-maintainable. There are two solutions: - provide a pointer to a network subsystem definition from struct net. This costs an additional dereferrence - place sub-system definition into the structure itself. This will speedup run-time access at the cost of recompilation time The second approach looks better for us. Other sub-systems will follow. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
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* NET4: Sysctl interface to net af_unix subsystem.
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*
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* Authors: Mike Shaver.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/mm.h>
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#include <linux/sysctl.h>
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#include <net/af_unix.h>
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static ctl_table unix_table[] = {
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{
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.ctl_name = NET_UNIX_MAX_DGRAM_QLEN,
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.procname = "max_dgram_qlen",
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.data = &init_net.unx.sysctl_max_dgram_qlen,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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{ .ctl_name = 0 }
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};
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static struct ctl_path unix_path[] = {
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{ .procname = "net", .ctl_name = CTL_NET, },
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{ .procname = "unix", .ctl_name = NET_UNIX, },
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{ },
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};
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int unix_sysctl_register(struct net *net)
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{
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struct ctl_table *table;
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table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
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if (table == NULL)
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goto err_alloc;
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table[0].data = &net->unx.sysctl_max_dgram_qlen;
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net->unx.ctl = register_net_sysctl_table(net, unix_path, table);
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if (net->unx.ctl == NULL)
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goto err_reg;
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return 0;
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err_reg:
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kfree(table);
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err_alloc:
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return -ENOMEM;
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}
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void unix_sysctl_unregister(struct net *net)
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{
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struct ctl_table *table;
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table = net->unx.ctl->ctl_table_arg;
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unregister_sysctl_table(net->unx.ctl);
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kfree(table);
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}
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