netfilter: xtables: change xt_match.checkentry return type

Restore function signatures from bool to int so that we can report
memory allocation failures or similar using -ENOMEM rather than
always having to pass -EINVAL back.

This semantic patch may not be too precise (checking for functions
that use xt_mtchk_param rather than functions referenced by
xt_match.checkentry), but reviewed, it produced the intended result.

// <smpl>
@@
type bool;
identifier check, par;
@@
-bool check
+int check
 (struct xt_mtchk_param *par) { ... }
// </smpl>

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

23 files changed, 28 insertions, 28 deletions

diff --git a/net/netfilter/xt_cluster.c b/net/netfilter/xt_cluster.c
index 4c273e871301..1f2c35ef1427 100644
--- a/net/netfilter/xt_cluster.c
+++ b/net/netfilter/xt_cluster.c
@@ -132,7 +132,7 @@ xt_cluster_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                !!(info->flags & XT_CLUSTER_F_INV);
 }
 
-static bool xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
+static int xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
 {
         struct xt_cluster_match_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_connbytes.c b/net/netfilter/xt_connbytes.c
index edb7bbd9ae54..136ef4ccdacb 100644
--- a/net/netfilter/xt_connbytes.c
+++ b/net/netfilter/xt_connbytes.c
@@ -93,7 +93,7 @@ connbytes_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                 return what >= sinfo->count.from;
 }
 
-static bool connbytes_mt_check(const struct xt_mtchk_param *par)
+static int connbytes_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_connbytes_info *sinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index d5b26dab9e26..a9fec38ab029 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -216,7 +216,7 @@ connlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return false;
 }
 
-static bool connlimit_mt_check(const struct xt_mtchk_param *par)
+static int connlimit_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_connlimit_info *info = par->matchinfo;
         unsigned int i;
diff --git a/net/netfilter/xt_connmark.c b/net/netfilter/xt_connmark.c
index 7a51ba63f545..df7eaff874f1 100644
--- a/net/netfilter/xt_connmark.c
+++ b/net/netfilter/xt_connmark.c
@@ -103,7 +103,7 @@ connmark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ((ct->mark & info->mask) == info->mark) ^ info->invert;
 }
 
-static bool connmark_mt_check(const struct xt_mtchk_param *par)
+static int connmark_mt_check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->family) < 0) {
                 pr_info("cannot load conntrack support for proto=%u\n",
diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index 387172b6b0d8..500e0338a187 100644
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -206,7 +206,7 @@ conntrack_mt_v2(const struct sk_buff *skb, const struct xt_match_param *par)
         return conntrack_mt(skb, par, info->state_mask, info->status_mask);
 }
 
-static bool conntrack_mt_check(const struct xt_mtchk_param *par)
+static int conntrack_mt_check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->family) < 0) {
                 pr_info("cannot load conntrack support for proto=%u\n",
diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c
index 8f6014f7c881..da8c301d24ea 100644
--- a/net/netfilter/xt_dccp.c
+++ b/net/netfilter/xt_dccp.c
@@ -123,7 +123,7 @@ dccp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                            XT_DCCP_OPTION, info->flags, info->invflags);
 }
 
-static bool dccp_mt_check(const struct xt_mtchk_param *par)
+static int dccp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_dccp_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_dscp.c b/net/netfilter/xt_dscp.c
index 6ecedc13db0c..295da4ce822c 100644
--- a/net/netfilter/xt_dscp.c
+++ b/net/netfilter/xt_dscp.c
@@ -42,7 +42,7 @@ dscp_mt6(const struct sk_buff *skb, const struct xt_match_param *par)
         return (dscp == info->dscp) ^ !!info->invert;
 }
 
-static bool dscp_mt_check(const struct xt_mtchk_param *par)
+static int dscp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_dscp_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_esp.c b/net/netfilter/xt_esp.c
index 1a446d626769..9f5da9795674 100644
--- a/net/netfilter/xt_esp.c
+++ b/net/netfilter/xt_esp.c
@@ -60,7 +60,7 @@ static bool esp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                          !!(espinfo->invflags & XT_ESP_INV_SPI));
 }
 
-static bool esp_mt_check(const struct xt_mtchk_param *par)
+static int esp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_esp *espinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 8f3e0c02ca54..d13800c95930 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -671,7 +671,7 @@ hashlimit_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return false;
 }
 
-static bool hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
+static int hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
 {
         struct net *net = par->net;
         struct xt_hashlimit_info *r = par->matchinfo;
@@ -707,7 +707,7 @@ static bool hashlimit_mt_check_v0(const struct xt_mtchk_param *par)
         return true;
 }
 
-static bool hashlimit_mt_check(const struct xt_mtchk_param *par)
+static int hashlimit_mt_check(const struct xt_mtchk_param *par)
 {
         struct net *net = par->net;
         struct xt_hashlimit_mtinfo1 *info = par->matchinfo;
diff --git a/net/netfilter/xt_helper.c b/net/netfilter/xt_helper.c
index 482aff2ccf7c..6e177b279f90 100644
--- a/net/netfilter/xt_helper.c
+++ b/net/netfilter/xt_helper.c
@@ -54,7 +54,7 @@ helper_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool helper_mt_check(const struct xt_mtchk_param *par)
+static int helper_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_helper_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index b3dfca63fa52..138a324df8df 100644
--- a/net/netfilter/xt_limit.c
+++ b/net/netfilter/xt_limit.c
@@ -97,7 +97,7 @@ user2credits(u_int32_t user)
         return (user * HZ * CREDITS_PER_JIFFY) / XT_LIMIT_SCALE;
 }
 
-static bool limit_mt_check(const struct xt_mtchk_param *par)
+static int limit_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_rateinfo *r = par->matchinfo;
         struct xt_limit_priv *priv;
diff --git a/net/netfilter/xt_multiport.c b/net/netfilter/xt_multiport.c
index 4fa90c86fdb5..b446738eab1a 100644
--- a/net/netfilter/xt_multiport.c
+++ b/net/netfilter/xt_multiport.c
@@ -152,7 +152,7 @@ check(u_int16_t proto,
                 && count <= XT_MULTI_PORTS;
 }
 
-static bool multiport_mt_check_v0(const struct xt_mtchk_param *par)
+static int multiport_mt_check_v0(const struct xt_mtchk_param *par)
 {
         const struct ipt_ip *ip = par->entryinfo;
         const struct xt_multiport *multiinfo = par->matchinfo;
@@ -161,7 +161,7 @@ static bool multiport_mt_check_v0(const struct xt_mtchk_param *par)
                      multiinfo->count);
 }
 
-static bool multiport_mt_check(const struct xt_mtchk_param *par)
+static int multiport_mt_check(const struct xt_mtchk_param *par)
 {
         const struct ipt_ip *ip = par->entryinfo;
         const struct xt_multiport_v1 *multiinfo = par->matchinfo;
@@ -170,7 +170,7 @@ static bool multiport_mt_check(const struct xt_mtchk_param *par)
                      multiinfo->count);
 }
 
-static bool multiport_mt6_check_v0(const struct xt_mtchk_param *par)
+static int multiport_mt6_check_v0(const struct xt_mtchk_param *par)
 {
         const struct ip6t_ip6 *ip = par->entryinfo;
         const struct xt_multiport *multiinfo = par->matchinfo;
@@ -179,7 +179,7 @@ static bool multiport_mt6_check_v0(const struct xt_mtchk_param *par)
                      multiinfo->count);
 }
 
-static bool multiport_mt6_check(const struct xt_mtchk_param *par)
+static int multiport_mt6_check(const struct xt_mtchk_param *par)
 {
         const struct ip6t_ip6 *ip = par->entryinfo;
         const struct xt_multiport_v1 *multiinfo = par->matchinfo;
diff --git a/net/netfilter/xt_physdev.c b/net/netfilter/xt_physdev.c
index 3d42a278408f..850e412c83ef 100644
--- a/net/netfilter/xt_physdev.c
+++ b/net/netfilter/xt_physdev.c
@@ -83,7 +83,7 @@ match_outdev:
         return (!!ret ^ !(info->invert & XT_PHYSDEV_OP_OUT));
 }
 
-static bool physdev_mt_check(const struct xt_mtchk_param *par)
+static int physdev_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_physdev_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_policy.c b/net/netfilter/xt_policy.c
index de3aded6afb8..c9965b640b16 100644
--- a/net/netfilter/xt_policy.c
+++ b/net/netfilter/xt_policy.c
@@ -128,7 +128,7 @@ policy_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool policy_mt_check(const struct xt_mtchk_param *par)
+static int policy_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_policy_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_quota.c b/net/netfilter/xt_quota.c
index 390b7d09fe51..2861fac5f2e1 100644
--- a/net/netfilter/xt_quota.c
+++ b/net/netfilter/xt_quota.c
@@ -43,7 +43,7 @@ quota_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool quota_mt_check(const struct xt_mtchk_param *par)
+static int quota_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_quota_info *q = par->matchinfo;
 
diff --git a/net/netfilter/xt_rateest.c b/net/netfilter/xt_rateest.c
index 4fc6a917f6de..3b5e3d613b18 100644
--- a/net/netfilter/xt_rateest.c
+++ b/net/netfilter/xt_rateest.c
@@ -74,7 +74,7 @@ xt_rateest_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool xt_rateest_mt_checkentry(const struct xt_mtchk_param *par)
+static int xt_rateest_mt_checkentry(const struct xt_mtchk_param *par)
 {
         struct xt_rateest_match_info *info = par->matchinfo;
         struct xt_rateest *est1, *est2;
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index 85309448c5e7..52042c8bf7f2 100644
--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -305,7 +305,7 @@ out:
         return ret;
 }
 
-static bool recent_mt_check(const struct xt_mtchk_param *par)
+static int recent_mt_check(const struct xt_mtchk_param *par)
 {
         struct recent_net *recent_net = recent_pernet(par->net);
         const struct xt_recent_mtinfo *info = par->matchinfo;
diff --git a/net/netfilter/xt_sctp.c b/net/netfilter/xt_sctp.c
index 977b182dea59..5037a7a0059c 100644
--- a/net/netfilter/xt_sctp.c
+++ b/net/netfilter/xt_sctp.c
@@ -144,7 +144,7 @@ sctp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                            XT_SCTP_CHUNK_TYPES, info->flags, info->invflags);
 }
 
-static bool sctp_mt_check(const struct xt_mtchk_param *par)
+static int sctp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_sctp_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_state.c b/net/netfilter/xt_state.c
index 94893be80276..8b15b1317f1f 100644
--- a/net/netfilter/xt_state.c
+++ b/net/netfilter/xt_state.c
@@ -37,7 +37,7 @@ state_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return (sinfo->statemask & statebit);
 }
 
-static bool state_mt_check(const struct xt_mtchk_param *par)
+static int state_mt_check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->family) < 0) {
                 pr_info("cannot load conntrack support for proto=%u\n",
diff --git a/net/netfilter/xt_statistic.c b/net/netfilter/xt_statistic.c
index 51ac1bbb4f52..a577ab008f57 100644
--- a/net/netfilter/xt_statistic.c
+++ b/net/netfilter/xt_statistic.c
@@ -52,7 +52,7 @@ statistic_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return ret;
 }
 
-static bool statistic_mt_check(const struct xt_mtchk_param *par)
+static int statistic_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_statistic_info *info = par->matchinfo;
 
diff --git a/net/netfilter/xt_string.c b/net/netfilter/xt_string.c
index b4d774111311..7d1412154e27 100644
--- a/net/netfilter/xt_string.c
+++ b/net/netfilter/xt_string.c
@@ -40,7 +40,7 @@ string_mt(const struct sk_buff *skb, const struct xt_match_param *par)
 
 #define STRING_TEXT_PRIV(m) ((struct xt_string_info *)(m))
 
-static bool string_mt_check(const struct xt_mtchk_param *par)
+static int string_mt_check(const struct xt_mtchk_param *par)
 {
         struct xt_string_info *conf = par->matchinfo;
         struct ts_config *ts_conf;
diff --git a/net/netfilter/xt_tcpudp.c b/net/netfilter/xt_tcpudp.c
index b53887f83c44..00728410099f 100644
--- a/net/netfilter/xt_tcpudp.c
+++ b/net/netfilter/xt_tcpudp.c
@@ -120,7 +120,7 @@ static bool tcp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool tcp_mt_check(const struct xt_mtchk_param *par)
+static int tcp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_tcp *tcpinfo = par->matchinfo;
 
@@ -155,7 +155,7 @@ static bool udp_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                               !!(udpinfo->invflags & XT_UDP_INV_DSTPT));
 }
 
-static bool udp_mt_check(const struct xt_mtchk_param *par)
+static int udp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_udp *udpinfo = par->matchinfo;
 
diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index 45ed05b5161f..db74f4fd57df 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -217,7 +217,7 @@ time_mt(const struct sk_buff *skb, const struct xt_match_param *par)
         return true;
 }
 
-static bool time_mt_check(const struct xt_mtchk_param *par)
+static int time_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_time_info *info = par->matchinfo;