netfilter: xtables: add struct xt_mtchk_param::net

Some complex match modules (like xt_hashlimit/xt_recent) want netns
information at constructor and destructor time. We propably can play
games at match destruction time, because netns can be passed in object,
but I think it's cleaner to explicitly pass netns.

Add ->net, make sure it's set from ebtables/iptables/ip6tables code.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 378f27ae7772f197c8a99afc99f0f78fa3addb3a..88261b9829a7ad87dfdf9e39df82b6e27277d610 100644 (file)
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -205,6 +205,7 @@ struct xt_match_param {
  * @hook_mask: via which hooks the new rule is reachable
  */
 struct xt_mtchk_param {
+       struct net *net;
        const char *table;
        const void *entryinfo;
        const struct xt_match *match;

diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index bd1c65425d4fc02e4b514711a2ee951a122c99fb..c77bab9866966092bae9edc194371e37db840b5b 100644 (file)
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -619,7 +619,9 @@ ebt_cleanup_entry(struct ebt_entry *e, unsigned int *cnt)
 }
 
 static inline int
-ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
+ebt_check_entry(struct ebt_entry *e,
+   struct net *net,
+   struct ebt_table_info *newinfo,
    const char *name, unsigned int *cnt,
    struct ebt_cl_stack *cl_s, unsigned int udc_cnt)
 {
@@ -671,6 +673,7 @@ ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
        }
        i = 0;
 
+       mtpar.net       = net;
        mtpar.table     = tgpar.table     = name;
        mtpar.entryinfo = tgpar.entryinfo = e;
        mtpar.hook_mask = tgpar.hook_mask = hookmask;
@@ -808,7 +811,8 @@ letscontinue:
 }
 
 /* do the parsing of the table/chains/entries/matches/watchers/targets, heh */
-static int translate_table(char *name, struct ebt_table_info *newinfo)
+static int translate_table(struct net *net, char *name,
+                          struct ebt_table_info *newinfo)
 {
        unsigned int i, j, k, udc_cnt;
        int ret;
@@ -917,7 +921,7 @@ static int translate_table(char *name, struct ebt_table_info *newinfo)
        /* used to know what we need to clean up if something goes wrong */
        i = 0;
        ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
-          ebt_check_entry, newinfo, name, &i, cl_s, udc_cnt);
+          ebt_check_entry, net, newinfo, name, &i, cl_s, udc_cnt);
        if (ret != 0) {
                EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
                   ebt_cleanup_entry, &i);
@@ -1017,7 +1021,7 @@ static int do_replace(struct net *net, void __user *user, unsigned int len)
        if (ret != 0)
                goto free_counterstmp;
 
-       ret = translate_table(tmp.name, newinfo);
+       ret = translate_table(net, tmp.name, newinfo);
 
        if (ret != 0)
                goto free_counterstmp;
@@ -1154,7 +1158,7 @@ ebt_register_table(struct net *net, const struct ebt_table *input_table)
                        newinfo->hook_entry[i] = p +
                                ((char *)repl->hook_entry[i] - repl->entries);
        }
-       ret = translate_table(repl->name, newinfo);
+       ret = translate_table(net, repl->name, newinfo);
        if (ret != 0) {
                BUGPRINT("Translate_table failed\n");
                goto free_chainstack;

diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 572330a552ef4e7f73f51f1ef23667baf28b645e..a069d72d94826e218aa1bb1182c6c50b1b2106a6 100644 (file)
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -661,8 +661,8 @@ static int check_target(struct ipt_entry *e, const char *name)
 }
 
 static int
-find_check_entry(struct ipt_entry *e, const char *name, unsigned int size,
-                unsigned int *i)
+find_check_entry(struct ipt_entry *e, struct net *net, const char *name,
+                unsigned int size, unsigned int *i)
 {
        struct ipt_entry_target *t;
        struct xt_target *target;
@@ -675,6 +675,7 @@ find_check_entry(struct ipt_entry *e, const char *name, unsigned int size,
                return ret;
 
        j = 0;
+       mtpar.net       = net;
        mtpar.table     = name;
        mtpar.entryinfo = &e->ip;
        mtpar.hook_mask = e->comefrom;
@@ -798,7 +799,8 @@ cleanup_entry(struct ipt_entry *e, unsigned int *i)
 /* Checks and translates the user-supplied table segment (held in
    newinfo) */
 static int
-translate_table(const char *name,
+translate_table(struct net *net,
+               const char *name,
                unsigned int valid_hooks,
                struct xt_table_info *newinfo,
                void *entry0,
@@ -860,7 +862,7 @@ translate_table(const char *name,
        /* Finally, each sanity check must pass */
        i = 0;
        ret = IPT_ENTRY_ITERATE(entry0, newinfo->size,
-                               find_check_entry, name, size, &i);
+                               find_check_entry, net, name, size, &i);
 
        if (ret != 0) {
                IPT_ENTRY_ITERATE(entry0, newinfo->size,
@@ -1303,7 +1305,7 @@ do_replace(struct net *net, void __user *user, unsigned int len)
                goto free_newinfo;
        }
 
-       ret = translate_table(tmp.name, tmp.valid_hooks,
+       ret = translate_table(net, tmp.name, tmp.valid_hooks,
                              newinfo, loc_cpu_entry, tmp.size, tmp.num_entries,
                              tmp.hook_entry, tmp.underflow);
        if (ret != 0)
@@ -1655,7 +1657,7 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr,
 }
 
 static int
-compat_check_entry(struct ipt_entry *e, const char *name,
+compat_check_entry(struct ipt_entry *e, struct net *net, const char *name,
                                     unsigned int *i)
 {
        struct xt_mtchk_param mtpar;
@@ -1663,6 +1665,7 @@ compat_check_entry(struct ipt_entry *e, const char *name,
        int ret;
 
        j = 0;
+       mtpar.net       = net;
        mtpar.table     = name;
        mtpar.entryinfo = &e->ip;
        mtpar.hook_mask = e->comefrom;
@@ -1684,7 +1687,8 @@ compat_check_entry(struct ipt_entry *e, const char *name,
 }
 
 static int
-translate_compat_table(const char *name,
+translate_compat_table(struct net *net,
+                      const char *name,
                       unsigned int valid_hooks,
                       struct xt_table_info **pinfo,
                       void **pentry0,
@@ -1773,7 +1777,7 @@ translate_compat_table(const char *name,
 
        i = 0;
        ret = IPT_ENTRY_ITERATE(entry1, newinfo->size, compat_check_entry,
-                               name, &i);
+                               net, name, &i);
        if (ret) {
                j -= i;
                COMPAT_IPT_ENTRY_ITERATE_CONTINUE(entry0, newinfo->size, i,
@@ -1833,7 +1837,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
                goto free_newinfo;
        }
 
-       ret = translate_compat_table(tmp.name, tmp.valid_hooks,
+       ret = translate_compat_table(net, tmp.name, tmp.valid_hooks,
                                     &newinfo, &loc_cpu_entry, tmp.size,
                                     tmp.num_entries, tmp.hook_entry,
                                     tmp.underflow);
@@ -2086,7 +2090,7 @@ struct xt_table *ipt_register_table(struct net *net,
        loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
        memcpy(loc_cpu_entry, repl->entries, repl->size);
 
-       ret = translate_table(table->name, table->valid_hooks,
+       ret = translate_table(net, table->name, table->valid_hooks,
                              newinfo, loc_cpu_entry, repl->size,
                              repl->num_entries,
                              repl->hook_entry,

diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 480d7f8c9802083660c19ca20d225254b40b3b18..a825940a92ef54436742d0f1cc98cd6a95a224de 100644 (file)
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -693,8 +693,8 @@ static int check_target(struct ip6t_entry *e, const char *name)
 }
 
 static int
-find_check_entry(struct ip6t_entry *e, const char *name, unsigned int size,
-                unsigned int *i)
+find_check_entry(struct ip6t_entry *e, struct net *net, const char *name,
+                unsigned int size, unsigned int *i)
 {
        struct ip6t_entry_target *t;
        struct xt_target *target;
@@ -707,6 +707,7 @@ find_check_entry(struct ip6t_entry *e, const char *name, unsigned int size,
                return ret;
 
        j = 0;
+       mtpar.net       = net;
        mtpar.table     = name;
        mtpar.entryinfo = &e->ipv6;
        mtpar.hook_mask = e->comefrom;
@@ -830,7 +831,8 @@ cleanup_entry(struct ip6t_entry *e, unsigned int *i)
 /* Checks and translates the user-supplied table segment (held in
    newinfo) */
 static int
-translate_table(const char *name,
+translate_table(struct net *net,
+               const char *name,
                unsigned int valid_hooks,
                struct xt_table_info *newinfo,
                void *entry0,
@@ -892,7 +894,7 @@ translate_table(const char *name,
        /* Finally, each sanity check must pass */
        i = 0;
        ret = IP6T_ENTRY_ITERATE(entry0, newinfo->size,
-                               find_check_entry, name, size, &i);
+                               find_check_entry, net, name, size, &i);
 
        if (ret != 0) {
                IP6T_ENTRY_ITERATE(entry0, newinfo->size,
@@ -1336,7 +1338,7 @@ do_replace(struct net *net, void __user *user, unsigned int len)
                goto free_newinfo;
        }
 
-       ret = translate_table(tmp.name, tmp.valid_hooks,
+       ret = translate_table(net, tmp.name, tmp.valid_hooks,
                              newinfo, loc_cpu_entry, tmp.size, tmp.num_entries,
                              tmp.hook_entry, tmp.underflow);
        if (ret != 0)
@@ -2121,7 +2123,7 @@ struct xt_table *ip6t_register_table(struct net *net,
        loc_cpu_entry = newinfo->entries[raw_smp_processor_id()];
        memcpy(loc_cpu_entry, repl->entries, repl->size);
 
-       ret = translate_table(table->name, table->valid_hooks,
+       ret = translate_table(net, table->name, table->valid_hooks,
                              newinfo, loc_cpu_entry, repl->size,
                              repl->num_entries,
                              repl->hook_entry,