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[NET] sysctl: prepare core tables to point to netns variables
Some of ctl variables are going to be on the struct net. Here's the way to adjust the ->data pointer on the ctl_table-s to point on the right variable. Since some pointers still point on the global variables, I keep turning the write bits off on such tables. This looks to become a common procedure for net sysctls, so later parts of this code may migrate to some more generic place. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -167,8 +167,13 @@ static __net_init int sysctl_core_net_init(struct net *net)
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if (tbl == NULL)
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goto err_dup;
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for (tmp = tbl; tmp->procname; tmp++)
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tmp->mode &= ~0222;
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for (tmp = tbl; tmp->procname; tmp++) {
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if (tmp->data >= (void *)&init_net &&
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tmp->data < (void *)(&init_net + 1))
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tmp->data += (char *)net - (char *)&init_net;
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else
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tmp->mode &= ~0222;
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}
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}
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net->sysctl_core_hdr = register_net_sysctl_table(net,
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