c899710fe7
Move from register_net_sysctl to register_net_sysctl_sz for all the
networking related files. Do this while making sure to mirror the NULL
assignments with a table_size of zero for the unprivileged users.
We need to move to the new function in preparation for when we change
SIZE_MAX to ARRAY_SIZE() in the register_net_sysctl macro. Failing to do
so would erroneously allow ARRAY_SIZE() to be called on a pointer. We
hold off the SIZE_MAX to ARRAY_SIZE change until we have migrated all
the relevant net sysctl registering functions to register_net_sysctl_sz
in subsequent commits.
An additional size function was added to the following files in order to
calculate the size of an array that is defined in another file:
include/net/ipv6.h
net/ipv6/icmp.c
net/ipv6/route.c
net/ipv6/sysctl_net_ipv6.c
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/sysctl.h>
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#include <linux/slab.h>
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#include <net/net_namespace.h>
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#include <net/xfrm.h>
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static void __net_init __xfrm_sysctl_init(struct net *net)
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{
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net->xfrm.sysctl_aevent_etime = XFRM_AE_ETIME;
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net->xfrm.sysctl_aevent_rseqth = XFRM_AE_SEQT_SIZE;
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net->xfrm.sysctl_larval_drop = 1;
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net->xfrm.sysctl_acq_expires = 30;
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}
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#ifdef CONFIG_SYSCTL
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static struct ctl_table xfrm_table[] = {
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{
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.procname = "xfrm_aevent_etime",
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.maxlen = sizeof(u32),
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.mode = 0644,
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.proc_handler = proc_douintvec
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},
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{
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.procname = "xfrm_aevent_rseqth",
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.maxlen = sizeof(u32),
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.mode = 0644,
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.proc_handler = proc_douintvec
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},
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{
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.procname = "xfrm_larval_drop",
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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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.procname = "xfrm_acq_expires",
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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 xfrm_sysctl_init(struct net *net)
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{
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struct ctl_table *table;
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size_t table_size = ARRAY_SIZE(xfrm_table);
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__xfrm_sysctl_init(net);
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table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
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if (!table)
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goto out_kmemdup;
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table[0].data = &net->xfrm.sysctl_aevent_etime;
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table[1].data = &net->xfrm.sysctl_aevent_rseqth;
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table[2].data = &net->xfrm.sysctl_larval_drop;
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table[3].data = &net->xfrm.sysctl_acq_expires;
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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_size = 0;
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}
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net->xfrm.sysctl_hdr = register_net_sysctl_sz(net, "net/core", table,
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table_size);
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if (!net->xfrm.sysctl_hdr)
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goto out_register;
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return 0;
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out_register:
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kfree(table);
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out_kmemdup:
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return -ENOMEM;
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}
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void __net_exit xfrm_sysctl_fini(struct net *net)
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{
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struct ctl_table *table;
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table = net->xfrm.sysctl_hdr->ctl_table_arg;
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unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
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kfree(table);
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}
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#else
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int __net_init xfrm_sysctl_init(struct net *net)
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{
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__xfrm_sysctl_init(net);
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return 0;
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}
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#endif
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