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ce218712b0
This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)
* Remove sentinel element from ctl_table structs.
* Remove the zeroing out of an array element (to make it look like a
sentinel) in neigh_sysctl_register and lowpan_frags_ns_sysctl_register
This is not longer needed and is safe after commit c899710fe7
("networking: Update to register_net_sysctl_sz") added the array size
to the ctl_table registration.
* Replace the for loop stop condition in sysctl_core_net_init that tests
for procname == NULL with one that depends on array size
* Removed the "-1" in mpls_net_init that adjusted for having an extra
empty element when looping over ctl_table arrays
* Use a table_size variable to keep the value of ARRAY_SIZE
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
// 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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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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if (net_eq(net, &init_net)) {
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table = unix_table;
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} else {
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table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
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if (!table)
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goto err_alloc;
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table[0].data = &net->unx.sysctl_max_dgram_qlen;
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}
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net->unx.ctl = register_net_sysctl_sz(net, "net/unix", table,
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ARRAY_SIZE(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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if (!net_eq(net, &init_net))
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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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const 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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if (!net_eq(net, &init_net))
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kfree(table);
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}
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