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73dbd8cf79
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/) To avoid lots of small commits, this commit brings together network changes from (as they appear in MAINTAINERS) LLC, MPTCP, NETROM NETWORK LAYER, PHONET PROTOCOL, ROSE NETWORK LAYER, RXRPC SOCKETS, SCTP PROTOCOL, SHARED MEMORY COMMUNICATIONS (SMC), TIPC NETWORK LAYER and NETWORKING [IPSEC] * Remove sentinel element from ctl_table structs. * Replace empty array registration with the register_net_sysctl_sz call in llc_sysctl_init * Replace the for loop stop condition that tests for procname == NULL with one that depends on array size in sctp_sysctl_net_register * Remove instances where an array element is zeroed out to make it look like a sentinel in xfrm_sysctl_init. This is not longer needed and is safe after commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added the array size to the ctl_table registration * 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>
89 lines
1.9 KiB
C
89 lines
1.9 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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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_size = 0;
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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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const 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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