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sysctl: treewide: constify ctl_table_header::ctl_table_arg

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To be able to constify instances of struct ctl_tables it is necessary to
remove ways through which non-const versions are exposed from the
sysctl core.
One of these is the ctl_table_arg member of struct ctl_table_header.

Constify this reference as a prerequisite for the full constification of
struct ctl_table instances.
No functional change.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Weißschuh 2024-04-18 11:40:08 +02:00 committed by David S. Miller
parent 8442f8ba26
commit bfa858f220
27 changed files with 30 additions and 30 deletions
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2
drivers/net/vrf.c
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@ -1971,7 +1971,7 @@ static int vrf_netns_init_sysctl(struct net *net, struct netns_vrf *nn_vrf)
static void vrf_netns_exit_sysctl(struct net *net)
{
struct netns_vrf *nn_vrf = net_generic(net, vrf_net_id);
struct ctl_table *table;
const struct ctl_table *table;
table = nn_vrf->ctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(nn_vrf->ctl_hdr);

2
include/linux/sysctl.h
View File

@ -182,7 +182,7 @@ struct ctl_table_header {
struct rcu_head rcu;
};
struct completion *unregistering;
struct ctl_table *ctl_table_arg;
const struct ctl_table *ctl_table_arg;
struct ctl_table_root *root;
struct ctl_table_set *set;
struct ctl_dir *parent;

2
ipc/ipc_sysctl.c
View File

@ -306,7 +306,7 @@ bool setup_ipc_sysctls(struct ipc_namespace *ns)
void retire_ipc_sysctls(struct ipc_namespace *ns)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = ns->ipc_sysctls->ctl_table_arg;
unregister_sysctl_table(ns->ipc_sysctls);

2
ipc/mq_sysctl.c
View File

@ -160,7 +160,7 @@ bool setup_mq_sysctls(struct ipc_namespace *ns)
void retire_mq_sysctls(struct ipc_namespace *ns)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = ns->mq_sysctls->ctl_table_arg;
unregister_sysctl_table(ns->mq_sysctls);

2
kernel/ucount.c
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@ -119,7 +119,7 @@ bool setup_userns_sysctls(struct user_namespace *ns)
void retire_userns_sysctls(struct user_namespace *ns)
{
#ifdef CONFIG_SYSCTL
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = ns->sysctls->ctl_table_arg;
unregister_sysctl_table(ns->sysctls);

2
net/ax25/sysctl_net_ax25.c
View File

@ -171,7 +171,7 @@ int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
{
struct ctl_table_header *header = ax25_dev->sysheader;
struct ctl_table *table;
const struct ctl_table *table;
if (header) {
ax25_dev->sysheader = NULL;

2
net/bridge/br_netfilter_hooks.c
View File

@ -1275,7 +1275,7 @@ static int br_netfilter_sysctl_init_net(struct net *net)
static void br_netfilter_sysctl_exit_net(struct net *net,
struct brnf_net *brnet)
{
struct ctl_table *table = brnet->ctl_hdr->ctl_table_arg;
const struct ctl_table *table = brnet->ctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(brnet->ctl_hdr);
if (!net_eq(net, &init_net))

2
net/core/sysctl_net_core.c
View File

@ -743,7 +743,7 @@ static __net_init int sysctl_core_net_init(struct net *net)
static __net_exit void sysctl_core_net_exit(struct net *net)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = net->core.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->core.sysctl_hdr);

2
net/ieee802154/6lowpan/reassembly.c
View File

@ -399,7 +399,7 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net)
static void __net_exit lowpan_frags_ns_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);

2
net/ipv4/devinet.c
View File

@ -2749,7 +2749,7 @@ static __net_init int devinet_init_net(struct net *net)
static __net_exit void devinet_exit_net(struct net *net)
{
#ifdef CONFIG_SYSCTL
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = net->ipv4.forw_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.forw_hdr);

2
net/ipv4/ip_fragment.c
View File

@ -632,7 +632,7 @@ static int __net_init ip4_frags_ns_ctl_register(struct net *net)
static void __net_exit ip4_frags_ns_ctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->ipv4.frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.frags_hdr);

2
net/ipv4/route.c
View File

@ -3576,7 +3576,7 @@ static __net_init int sysctl_route_net_init(struct net *net)
static __net_exit void sysctl_route_net_exit(struct net *net)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = net->ipv4.route_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.route_hdr);

2
net/ipv4/sysctl_net_ipv4.c
View File

@ -1554,7 +1554,7 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
static __net_exit void ipv4_sysctl_exit_net(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
kfree(net->ipv4.sysctl_local_reserved_ports);
table = net->ipv4.ipv4_hdr->ctl_table_arg;

2
net/ipv4/xfrm4_policy.c
View File

@ -186,7 +186,7 @@ static __net_init int xfrm4_net_sysctl_init(struct net *net)
static __net_exit void xfrm4_net_sysctl_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
if (!net->ipv4.xfrm4_hdr)
return;

2
net/ipv6/addrconf.c
View File

@ -7238,7 +7238,7 @@ static int __addrconf_sysctl_register(struct net *net, char *dev_name,
static void __addrconf_sysctl_unregister(struct net *net,
struct ipv6_devconf *p, int ifindex)
{
struct ctl_table *table;
const struct ctl_table *table;
if (!p->sysctl_header)
return;

2
net/ipv6/netfilter/nf_conntrack_reasm.c
View File

@ -105,7 +105,7 @@ static int nf_ct_frag6_sysctl_register(struct net *net)
static void __net_exit nf_ct_frags6_sysctl_unregister(struct net *net)
{
struct nft_ct_frag6_pernet *nf_frag = nf_frag_pernet(net);
struct ctl_table *table;
const struct ctl_table *table;
table = nf_frag->nf_frag_frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(nf_frag->nf_frag_frags_hdr);

2
net/ipv6/reassembly.c
View File

@ -487,7 +487,7 @@ static int __net_init ip6_frags_ns_sysctl_register(struct net *net)
static void __net_exit ip6_frags_ns_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->ipv6.sysctl.frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr);

6
net/ipv6/sysctl_net_ipv6.c
View File

@ -313,9 +313,9 @@ static int __net_init ipv6_sysctl_net_init(struct net *net)
static void __net_exit ipv6_sysctl_net_exit(struct net *net)
{
struct ctl_table *ipv6_table;
struct ctl_table *ipv6_route_table;
struct ctl_table *ipv6_icmp_table;
const struct ctl_table *ipv6_table;
const struct ctl_table *ipv6_route_table;
const struct ctl_table *ipv6_icmp_table;
ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;

2
net/ipv6/xfrm6_policy.c
View File

@ -218,7 +218,7 @@ static int __net_init xfrm6_net_sysctl_init(struct net *net)
static void __net_exit xfrm6_net_sysctl_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
if (!net->ipv6.sysctl.xfrm6_hdr)
return;

4
net/mpls/af_mpls.c
View File

@ -1422,7 +1422,7 @@ static void mpls_dev_sysctl_unregister(struct net_device *dev,
struct mpls_dev *mdev)
{
struct net *net = dev_net(dev);
struct ctl_table *table;
const struct ctl_table *table;
if (!mdev->sysctl)
return;
@ -2690,7 +2690,7 @@ static void mpls_net_exit(struct net *net)
{
struct mpls_route __rcu **platform_label;
size_t platform_labels;
struct ctl_table *table;
const struct ctl_table *table;
unsigned int index;
table = net->mpls.ctl->ctl_table_arg;

2
net/mptcp/ctrl.c
View File

@ -198,7 +198,7 @@ static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
static void mptcp_pernet_del_table(struct mptcp_pernet *pernet)
{
struct ctl_table *table = pernet->ctl_table_hdr->ctl_table_arg;
const struct ctl_table *table = pernet->ctl_table_hdr->ctl_table_arg;
unregister_net_sysctl_table(pernet->ctl_table_hdr);

2
net/netfilter/nf_conntrack_standalone.c
View File

@ -1122,7 +1122,7 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
static void nf_conntrack_standalone_fini_sysctl(struct net *net)
{
struct nf_conntrack_net *cnet = nf_ct_pernet(net);
struct ctl_table *table;
const struct ctl_table *table;
table = cnet->sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(cnet->sysctl_header);

2
net/netfilter/nf_log.c
View File

@ -514,7 +514,7 @@ static int netfilter_log_sysctl_init(struct net *net)
static void netfilter_log_sysctl_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->nf.nf_log_dir_header->ctl_table_arg;
unregister_net_sysctl_table(net->nf.nf_log_dir_header);

2
net/sctp/sysctl.c
View File

@ -624,7 +624,7 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->sctp.sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);

2
net/smc/smc_sysctl.c
View File

@ -133,7 +133,7 @@ int __net_init smc_sysctl_net_init(struct net *net)
void __net_exit smc_sysctl_net_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->smc.smc_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->smc.smc_hdr);

2
net/unix/sysctl_net_unix.c
View File

@ -52,7 +52,7 @@ int __net_init unix_sysctl_register(struct net *net)
void unix_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->unx.ctl->ctl_table_arg;
unregister_net_sysctl_table(net->unx.ctl);

2
net/xfrm/xfrm_sysctl.c
View File

@ -76,7 +76,7 @@ int __net_init xfrm_sysctl_init(struct net *net)
void __net_exit xfrm_sysctl_fini(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->xfrm.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->xfrm.sysctl_hdr);