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57 lines
1.1 KiB
57 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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#include <linux/mm.h> |
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#include <linux/slab.h> |
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#include <linux/sysctl.h> |
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#include <net/af_unix.h> |
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static struct ctl_table unix_table[] = { |
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{ |
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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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{ } |
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}; |
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int __net_init 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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/* Don't export sysctls to unprivileged users */ |
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if (net->user_ns != &init_user_ns) |
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table[0].procname = NULL; |
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table[0].data = &net->unx.sysctl_max_dgram_qlen; |
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net->unx.ctl = register_net_sysctl(net, "net/unix", 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_net_sysctl_table(net->unx.ctl); |
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kfree(table); |
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}
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