Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu> |
| 2 | * Patrick Schaaf <bof@bof.de> |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 3 | * Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | */ |
| 9 | |
| 10 | /* Kernel module for IP set management */ |
| 11 | |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/moduleparam.h> |
| 15 | #include <linux/ip.h> |
| 16 | #include <linux/skbuff.h> |
| 17 | #include <linux/spinlock.h> |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 18 | #include <linux/rculist.h> |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 19 | #include <net/netlink.h> |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 20 | #include <net/net_namespace.h> |
| 21 | #include <net/netns/generic.h> |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 22 | |
| 23 | #include <linux/netfilter.h> |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 24 | #include <linux/netfilter/x_tables.h> |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 25 | #include <linux/netfilter/nfnetlink.h> |
| 26 | #include <linux/netfilter/ipset/ip_set.h> |
| 27 | |
| 28 | static LIST_HEAD(ip_set_type_list); /* all registered set types */ |
| 29 | static DEFINE_MUTEX(ip_set_type_mutex); /* protects ip_set_type_list */ |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 30 | static DEFINE_RWLOCK(ip_set_ref_lock); /* protects the set refs */ |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 31 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 32 | struct ip_set_net { |
| 33 | struct ip_set * __rcu *ip_set_list; /* all individual sets */ |
| 34 | ip_set_id_t ip_set_max; /* max number of sets */ |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 35 | bool is_deleted; /* deleted by ip_set_net_exit */ |
| 36 | bool is_destroyed; /* all sets are destroyed */ |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 37 | }; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 38 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 39 | static int ip_set_net_id __read_mostly; |
| 40 | |
| 41 | static inline struct ip_set_net *ip_set_pernet(struct net *net) |
| 42 | { |
| 43 | return net_generic(net, ip_set_net_id); |
| 44 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 45 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 46 | #define IP_SET_INC 64 |
Jozsef Kadlecsik | 22496f09 | 2015-05-02 19:27:58 +0200 | [diff] [blame] | 47 | #define STRNCMP(a, b) (strncmp(a, b, IPSET_MAXNAMELEN) == 0) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 48 | |
| 49 | static unsigned int max_sets; |
| 50 | |
| 51 | module_param(max_sets, int, 0600); |
| 52 | MODULE_PARM_DESC(max_sets, "maximal number of sets"); |
| 53 | MODULE_LICENSE("GPL"); |
| 54 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); |
| 55 | MODULE_DESCRIPTION("core IP set support"); |
| 56 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET); |
| 57 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 58 | /* When the nfnl mutex is held: */ |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 59 | #define ip_set_dereference(p) \ |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 60 | rcu_dereference_protected(p, 1) |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 61 | #define ip_set(inst, id) \ |
| 62 | ip_set_dereference((inst)->ip_set_list)[id] |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 63 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 64 | /* The set types are implemented in modules and registered set types |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 65 | * can be found in ip_set_type_list. Adding/deleting types is |
| 66 | * serialized by ip_set_type_mutex. |
| 67 | */ |
| 68 | |
| 69 | static inline void |
| 70 | ip_set_type_lock(void) |
| 71 | { |
| 72 | mutex_lock(&ip_set_type_mutex); |
| 73 | } |
| 74 | |
| 75 | static inline void |
| 76 | ip_set_type_unlock(void) |
| 77 | { |
| 78 | mutex_unlock(&ip_set_type_mutex); |
| 79 | } |
| 80 | |
| 81 | /* Register and deregister settype */ |
| 82 | |
| 83 | static struct ip_set_type * |
| 84 | find_set_type(const char *name, u8 family, u8 revision) |
| 85 | { |
| 86 | struct ip_set_type *type; |
| 87 | |
| 88 | list_for_each_entry_rcu(type, &ip_set_type_list, list) |
Jozsef Kadlecsik | 22496f09 | 2015-05-02 19:27:58 +0200 | [diff] [blame] | 89 | if (STRNCMP(type->name, name) && |
Jozsef Kadlecsik | 3ace95c | 2012-09-21 22:01:45 +0200 | [diff] [blame] | 90 | (type->family == family || |
| 91 | type->family == NFPROTO_UNSPEC) && |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 92 | revision >= type->revision_min && |
| 93 | revision <= type->revision_max) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 94 | return type; |
| 95 | return NULL; |
| 96 | } |
| 97 | |
| 98 | /* Unlock, try to load a set type module and lock again */ |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 99 | static bool |
| 100 | load_settype(const char *name) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 101 | { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 102 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 103 | pr_debug("try to load ip_set_%s\n", name); |
| 104 | if (request_module("ip_set_%s", name) < 0) { |
Joe Perches | b167a37 | 2014-09-09 21:17:32 -0700 | [diff] [blame] | 105 | pr_warn("Can't find ip_set type %s\n", name); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 106 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 107 | return false; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 108 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 109 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 110 | return true; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | /* Find a set type and reference it */ |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 114 | #define find_set_type_get(name, family, revision, found) \ |
| 115 | __find_set_type_get(name, family, revision, found, false) |
| 116 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 117 | static int |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 118 | __find_set_type_get(const char *name, u8 family, u8 revision, |
| 119 | struct ip_set_type **found, bool retry) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 120 | { |
Jozsef Kadlecsik | 5c1aba4 | 2011-03-20 15:35:01 +0100 | [diff] [blame] | 121 | struct ip_set_type *type; |
| 122 | int err; |
| 123 | |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 124 | if (retry && !load_settype(name)) |
| 125 | return -IPSET_ERR_FIND_TYPE; |
| 126 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 127 | rcu_read_lock(); |
| 128 | *found = find_set_type(name, family, revision); |
| 129 | if (*found) { |
Jozsef Kadlecsik | 5c1aba4 | 2011-03-20 15:35:01 +0100 | [diff] [blame] | 130 | err = !try_module_get((*found)->me) ? -EFAULT : 0; |
| 131 | goto unlock; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 132 | } |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 133 | /* Make sure the type is already loaded |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 134 | * but we don't support the revision |
| 135 | */ |
Jozsef Kadlecsik | 5c1aba4 | 2011-03-20 15:35:01 +0100 | [diff] [blame] | 136 | list_for_each_entry_rcu(type, &ip_set_type_list, list) |
Jozsef Kadlecsik | 22496f09 | 2015-05-02 19:27:58 +0200 | [diff] [blame] | 137 | if (STRNCMP(type->name, name)) { |
Jozsef Kadlecsik | 5c1aba4 | 2011-03-20 15:35:01 +0100 | [diff] [blame] | 138 | err = -IPSET_ERR_FIND_TYPE; |
| 139 | goto unlock; |
| 140 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 141 | rcu_read_unlock(); |
| 142 | |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 143 | return retry ? -IPSET_ERR_FIND_TYPE : |
| 144 | __find_set_type_get(name, family, revision, found, true); |
Jozsef Kadlecsik | 5c1aba4 | 2011-03-20 15:35:01 +0100 | [diff] [blame] | 145 | |
| 146 | unlock: |
| 147 | rcu_read_unlock(); |
| 148 | return err; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | /* Find a given set type by name and family. |
| 152 | * If we succeeded, the supported minimal and maximum revisions are |
| 153 | * filled out. |
| 154 | */ |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 155 | #define find_set_type_minmax(name, family, min, max) \ |
| 156 | __find_set_type_minmax(name, family, min, max, false) |
| 157 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 158 | static int |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 159 | __find_set_type_minmax(const char *name, u8 family, u8 *min, u8 *max, |
| 160 | bool retry) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 161 | { |
| 162 | struct ip_set_type *type; |
| 163 | bool found = false; |
| 164 | |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 165 | if (retry && !load_settype(name)) |
| 166 | return -IPSET_ERR_FIND_TYPE; |
| 167 | |
Jozsef Kadlecsik | 5c1aba4 | 2011-03-20 15:35:01 +0100 | [diff] [blame] | 168 | *min = 255; *max = 0; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 169 | rcu_read_lock(); |
| 170 | list_for_each_entry_rcu(type, &ip_set_type_list, list) |
Jozsef Kadlecsik | 22496f09 | 2015-05-02 19:27:58 +0200 | [diff] [blame] | 171 | if (STRNCMP(type->name, name) && |
Jozsef Kadlecsik | 3ace95c | 2012-09-21 22:01:45 +0200 | [diff] [blame] | 172 | (type->family == family || |
| 173 | type->family == NFPROTO_UNSPEC)) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 174 | found = true; |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 175 | if (type->revision_min < *min) |
| 176 | *min = type->revision_min; |
| 177 | if (type->revision_max > *max) |
| 178 | *max = type->revision_max; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 179 | } |
| 180 | rcu_read_unlock(); |
| 181 | if (found) |
| 182 | return 0; |
| 183 | |
Jozsef Kadlecsik | 088067f | 2012-01-17 10:39:05 +0100 | [diff] [blame] | 184 | return retry ? -IPSET_ERR_FIND_TYPE : |
| 185 | __find_set_type_minmax(name, family, min, max, true); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 186 | } |
| 187 | |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 188 | #define family_name(f) ((f) == NFPROTO_IPV4 ? "inet" : \ |
| 189 | (f) == NFPROTO_IPV6 ? "inet6" : "any") |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 190 | |
| 191 | /* Register a set type structure. The type is identified by |
| 192 | * the unique triple of name, family and revision. |
| 193 | */ |
| 194 | int |
| 195 | ip_set_type_register(struct ip_set_type *type) |
| 196 | { |
| 197 | int ret = 0; |
| 198 | |
| 199 | if (type->protocol != IPSET_PROTOCOL) { |
Joe Perches | b167a37 | 2014-09-09 21:17:32 -0700 | [diff] [blame] | 200 | pr_warn("ip_set type %s, family %s, revision %u:%u uses wrong protocol version %u (want %u)\n", |
| 201 | type->name, family_name(type->family), |
| 202 | type->revision_min, type->revision_max, |
| 203 | type->protocol, IPSET_PROTOCOL); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 204 | return -EINVAL; |
| 205 | } |
| 206 | |
| 207 | ip_set_type_lock(); |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 208 | if (find_set_type(type->name, type->family, type->revision_min)) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 209 | /* Duplicate! */ |
Joe Perches | b167a37 | 2014-09-09 21:17:32 -0700 | [diff] [blame] | 210 | pr_warn("ip_set type %s, family %s with revision min %u already registered!\n", |
| 211 | type->name, family_name(type->family), |
| 212 | type->revision_min); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 213 | ip_set_type_unlock(); |
| 214 | return -EINVAL; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 215 | } |
| 216 | list_add_rcu(&type->list, &ip_set_type_list); |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 217 | pr_debug("type %s, family %s, revision %u:%u registered.\n", |
| 218 | type->name, family_name(type->family), |
| 219 | type->revision_min, type->revision_max); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 220 | ip_set_type_unlock(); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 221 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 222 | return ret; |
| 223 | } |
| 224 | EXPORT_SYMBOL_GPL(ip_set_type_register); |
| 225 | |
| 226 | /* Unregister a set type. There's a small race with ip_set_create */ |
| 227 | void |
| 228 | ip_set_type_unregister(struct ip_set_type *type) |
| 229 | { |
| 230 | ip_set_type_lock(); |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 231 | if (!find_set_type(type->name, type->family, type->revision_min)) { |
Joe Perches | b167a37 | 2014-09-09 21:17:32 -0700 | [diff] [blame] | 232 | pr_warn("ip_set type %s, family %s with revision min %u not registered\n", |
| 233 | type->name, family_name(type->family), |
| 234 | type->revision_min); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 235 | ip_set_type_unlock(); |
| 236 | return; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 237 | } |
| 238 | list_del_rcu(&type->list); |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 239 | pr_debug("type %s, family %s with revision min %u unregistered.\n", |
| 240 | type->name, family_name(type->family), type->revision_min); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 241 | ip_set_type_unlock(); |
| 242 | |
| 243 | synchronize_rcu(); |
| 244 | } |
| 245 | EXPORT_SYMBOL_GPL(ip_set_type_unregister); |
| 246 | |
| 247 | /* Utility functions */ |
| 248 | void * |
| 249 | ip_set_alloc(size_t size) |
| 250 | { |
| 251 | void *members = NULL; |
| 252 | |
| 253 | if (size < KMALLOC_MAX_SIZE) |
| 254 | members = kzalloc(size, GFP_KERNEL | __GFP_NOWARN); |
| 255 | |
| 256 | if (members) { |
| 257 | pr_debug("%p: allocated with kmalloc\n", members); |
| 258 | return members; |
| 259 | } |
| 260 | |
| 261 | members = vzalloc(size); |
| 262 | if (!members) |
| 263 | return NULL; |
| 264 | pr_debug("%p: allocated with vmalloc\n", members); |
| 265 | |
| 266 | return members; |
| 267 | } |
| 268 | EXPORT_SYMBOL_GPL(ip_set_alloc); |
| 269 | |
| 270 | void |
| 271 | ip_set_free(void *members) |
| 272 | { |
| 273 | pr_debug("%p: free with %s\n", members, |
| 274 | is_vmalloc_addr(members) ? "vfree" : "kfree"); |
WANG Cong | 4cb2897 | 2014-06-02 15:55:22 -0700 | [diff] [blame] | 275 | kvfree(members); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 276 | } |
| 277 | EXPORT_SYMBOL_GPL(ip_set_free); |
| 278 | |
| 279 | static inline bool |
| 280 | flag_nested(const struct nlattr *nla) |
| 281 | { |
| 282 | return nla->nla_type & NLA_F_NESTED; |
| 283 | } |
| 284 | |
| 285 | static const struct nla_policy ipaddr_policy[IPSET_ATTR_IPADDR_MAX + 1] = { |
| 286 | [IPSET_ATTR_IPADDR_IPV4] = { .type = NLA_U32 }, |
| 287 | [IPSET_ATTR_IPADDR_IPV6] = { .type = NLA_BINARY, |
| 288 | .len = sizeof(struct in6_addr) }, |
| 289 | }; |
| 290 | |
| 291 | int |
| 292 | ip_set_get_ipaddr4(struct nlattr *nla, __be32 *ipaddr) |
| 293 | { |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 294 | struct nlattr *tb[IPSET_ATTR_IPADDR_MAX + 1]; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 295 | |
| 296 | if (unlikely(!flag_nested(nla))) |
| 297 | return -IPSET_ERR_PROTOCOL; |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 298 | if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 299 | return -IPSET_ERR_PROTOCOL; |
| 300 | if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV4))) |
| 301 | return -IPSET_ERR_PROTOCOL; |
| 302 | |
| 303 | *ipaddr = nla_get_be32(tb[IPSET_ATTR_IPADDR_IPV4]); |
| 304 | return 0; |
| 305 | } |
| 306 | EXPORT_SYMBOL_GPL(ip_set_get_ipaddr4); |
| 307 | |
| 308 | int |
| 309 | ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr) |
| 310 | { |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 311 | struct nlattr *tb[IPSET_ATTR_IPADDR_MAX + 1]; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 312 | |
| 313 | if (unlikely(!flag_nested(nla))) |
| 314 | return -IPSET_ERR_PROTOCOL; |
| 315 | |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 316 | if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 317 | return -IPSET_ERR_PROTOCOL; |
| 318 | if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV6))) |
| 319 | return -IPSET_ERR_PROTOCOL; |
| 320 | |
| 321 | memcpy(ipaddr, nla_data(tb[IPSET_ATTR_IPADDR_IPV6]), |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 322 | sizeof(struct in6_addr)); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 323 | return 0; |
| 324 | } |
| 325 | EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6); |
| 326 | |
Oliver Smith | 68b63f0 | 2013-09-22 20:56:30 +0200 | [diff] [blame] | 327 | typedef void (*destroyer)(void *); |
Jozsef Kadlecsik | 03c8b23 | 2013-09-07 00:43:52 +0200 | [diff] [blame] | 328 | /* ipset data extension types, in size order */ |
| 329 | |
| 330 | const struct ip_set_ext_type ip_set_extensions[] = { |
| 331 | [IPSET_EXT_ID_COUNTER] = { |
| 332 | .type = IPSET_EXT_COUNTER, |
| 333 | .flag = IPSET_FLAG_WITH_COUNTERS, |
| 334 | .len = sizeof(struct ip_set_counter), |
| 335 | .align = __alignof__(struct ip_set_counter), |
| 336 | }, |
| 337 | [IPSET_EXT_ID_TIMEOUT] = { |
| 338 | .type = IPSET_EXT_TIMEOUT, |
| 339 | .len = sizeof(unsigned long), |
| 340 | .align = __alignof__(unsigned long), |
| 341 | }, |
Anton Danilov | 0e9871e | 2014-08-28 10:11:27 +0400 | [diff] [blame] | 342 | [IPSET_EXT_ID_SKBINFO] = { |
| 343 | .type = IPSET_EXT_SKBINFO, |
| 344 | .flag = IPSET_FLAG_WITH_SKBINFO, |
| 345 | .len = sizeof(struct ip_set_skbinfo), |
| 346 | .align = __alignof__(struct ip_set_skbinfo), |
| 347 | }, |
Oliver Smith | 68b63f0 | 2013-09-22 20:56:30 +0200 | [diff] [blame] | 348 | [IPSET_EXT_ID_COMMENT] = { |
| 349 | .type = IPSET_EXT_COMMENT | IPSET_EXT_DESTROY, |
| 350 | .flag = IPSET_FLAG_WITH_COMMENT, |
| 351 | .len = sizeof(struct ip_set_comment), |
| 352 | .align = __alignof__(struct ip_set_comment), |
| 353 | .destroy = (destroyer) ip_set_comment_free, |
| 354 | }, |
Jozsef Kadlecsik | 03c8b23 | 2013-09-07 00:43:52 +0200 | [diff] [blame] | 355 | }; |
| 356 | EXPORT_SYMBOL_GPL(ip_set_extensions); |
| 357 | |
| 358 | static inline bool |
| 359 | add_extension(enum ip_set_ext_id id, u32 flags, struct nlattr *tb[]) |
| 360 | { |
| 361 | return ip_set_extensions[id].flag ? |
| 362 | (flags & ip_set_extensions[id].flag) : |
| 363 | !!tb[IPSET_ATTR_TIMEOUT]; |
| 364 | } |
| 365 | |
| 366 | size_t |
| 367 | ip_set_elem_len(struct ip_set *set, struct nlattr *tb[], size_t len) |
| 368 | { |
| 369 | enum ip_set_ext_id id; |
Sergey Popovich | caed0ed | 2015-05-02 19:28:03 +0200 | [diff] [blame] | 370 | size_t offset = len; |
Jozsef Kadlecsik | 03c8b23 | 2013-09-07 00:43:52 +0200 | [diff] [blame] | 371 | u32 cadt_flags = 0; |
| 372 | |
| 373 | if (tb[IPSET_ATTR_CADT_FLAGS]) |
| 374 | cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); |
Josh Hunt | 07cf8f5 | 2014-02-28 22:14:57 -0500 | [diff] [blame] | 375 | if (cadt_flags & IPSET_FLAG_WITH_FORCEADD) |
| 376 | set->flags |= IPSET_CREATE_FLAG_FORCEADD; |
Jozsef Kadlecsik | 03c8b23 | 2013-09-07 00:43:52 +0200 | [diff] [blame] | 377 | for (id = 0; id < IPSET_EXT_ID_MAX; id++) { |
| 378 | if (!add_extension(id, cadt_flags, tb)) |
| 379 | continue; |
Sergey Popovich | caed0ed | 2015-05-02 19:28:03 +0200 | [diff] [blame] | 380 | offset = ALIGN(offset, ip_set_extensions[id].align); |
Jozsef Kadlecsik | 03c8b23 | 2013-09-07 00:43:52 +0200 | [diff] [blame] | 381 | set->offset[id] = offset; |
| 382 | set->extensions |= ip_set_extensions[id].type; |
| 383 | offset += ip_set_extensions[id].len; |
| 384 | } |
Sergey Popovich | caed0ed | 2015-05-02 19:28:03 +0200 | [diff] [blame] | 385 | return offset; |
Jozsef Kadlecsik | 03c8b23 | 2013-09-07 00:43:52 +0200 | [diff] [blame] | 386 | } |
| 387 | EXPORT_SYMBOL_GPL(ip_set_elem_len); |
| 388 | |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 389 | int |
| 390 | ip_set_get_extensions(struct ip_set *set, struct nlattr *tb[], |
| 391 | struct ip_set_ext *ext) |
| 392 | { |
Anton Danilov | 0e9871e | 2014-08-28 10:11:27 +0400 | [diff] [blame] | 393 | u64 fullmark; |
Sergey Popovich | 7dd37bc | 2015-06-12 21:14:09 +0200 | [diff] [blame] | 394 | |
| 395 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
| 396 | !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) || |
| 397 | !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) || |
| 398 | !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) || |
| 399 | !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) || |
| 400 | !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE))) |
| 401 | return -IPSET_ERR_PROTOCOL; |
| 402 | |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 403 | if (tb[IPSET_ATTR_TIMEOUT]) { |
Sergey Popovich | edda079 | 2015-06-12 21:11:54 +0200 | [diff] [blame] | 404 | if (!SET_WITH_TIMEOUT(set)) |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 405 | return -IPSET_ERR_TIMEOUT; |
| 406 | ext->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 407 | } |
Jozsef Kadlecsik | 34d666d | 2013-04-27 14:38:56 +0200 | [diff] [blame] | 408 | if (tb[IPSET_ATTR_BYTES] || tb[IPSET_ATTR_PACKETS]) { |
Sergey Popovich | edda079 | 2015-06-12 21:11:54 +0200 | [diff] [blame] | 409 | if (!SET_WITH_COUNTER(set)) |
Jozsef Kadlecsik | 34d666d | 2013-04-27 14:38:56 +0200 | [diff] [blame] | 410 | return -IPSET_ERR_COUNTER; |
| 411 | if (tb[IPSET_ATTR_BYTES]) |
| 412 | ext->bytes = be64_to_cpu(nla_get_be64( |
| 413 | tb[IPSET_ATTR_BYTES])); |
| 414 | if (tb[IPSET_ATTR_PACKETS]) |
| 415 | ext->packets = be64_to_cpu(nla_get_be64( |
| 416 | tb[IPSET_ATTR_PACKETS])); |
| 417 | } |
Oliver Smith | 68b63f0 | 2013-09-22 20:56:30 +0200 | [diff] [blame] | 418 | if (tb[IPSET_ATTR_COMMENT]) { |
Sergey Popovich | edda079 | 2015-06-12 21:11:54 +0200 | [diff] [blame] | 419 | if (!SET_WITH_COMMENT(set)) |
Oliver Smith | 68b63f0 | 2013-09-22 20:56:30 +0200 | [diff] [blame] | 420 | return -IPSET_ERR_COMMENT; |
| 421 | ext->comment = ip_set_comment_uget(tb[IPSET_ATTR_COMMENT]); |
| 422 | } |
Anton Danilov | 0e9871e | 2014-08-28 10:11:27 +0400 | [diff] [blame] | 423 | if (tb[IPSET_ATTR_SKBMARK]) { |
Sergey Popovich | edda079 | 2015-06-12 21:11:54 +0200 | [diff] [blame] | 424 | if (!SET_WITH_SKBINFO(set)) |
Anton Danilov | 0e9871e | 2014-08-28 10:11:27 +0400 | [diff] [blame] | 425 | return -IPSET_ERR_SKBINFO; |
| 426 | fullmark = be64_to_cpu(nla_get_be64(tb[IPSET_ATTR_SKBMARK])); |
| 427 | ext->skbmark = fullmark >> 32; |
| 428 | ext->skbmarkmask = fullmark & 0xffffffff; |
| 429 | } |
| 430 | if (tb[IPSET_ATTR_SKBPRIO]) { |
Sergey Popovich | edda079 | 2015-06-12 21:11:54 +0200 | [diff] [blame] | 431 | if (!SET_WITH_SKBINFO(set)) |
Anton Danilov | 0e9871e | 2014-08-28 10:11:27 +0400 | [diff] [blame] | 432 | return -IPSET_ERR_SKBINFO; |
| 433 | ext->skbprio = be32_to_cpu(nla_get_be32( |
| 434 | tb[IPSET_ATTR_SKBPRIO])); |
| 435 | } |
| 436 | if (tb[IPSET_ATTR_SKBQUEUE]) { |
Sergey Popovich | edda079 | 2015-06-12 21:11:54 +0200 | [diff] [blame] | 437 | if (!SET_WITH_SKBINFO(set)) |
Anton Danilov | 0e9871e | 2014-08-28 10:11:27 +0400 | [diff] [blame] | 438 | return -IPSET_ERR_SKBINFO; |
| 439 | ext->skbqueue = be16_to_cpu(nla_get_be16( |
| 440 | tb[IPSET_ATTR_SKBQUEUE])); |
| 441 | } |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 442 | return 0; |
| 443 | } |
| 444 | EXPORT_SYMBOL_GPL(ip_set_get_extensions); |
| 445 | |
Denys Vlasenko | a3b1c1e | 2015-05-06 16:28:57 +0200 | [diff] [blame] | 446 | int |
| 447 | ip_set_put_extensions(struct sk_buff *skb, const struct ip_set *set, |
| 448 | const void *e, bool active) |
| 449 | { |
| 450 | if (SET_WITH_TIMEOUT(set)) { |
| 451 | unsigned long *timeout = ext_timeout(e, set); |
| 452 | |
| 453 | if (nla_put_net32(skb, IPSET_ATTR_TIMEOUT, |
| 454 | htonl(active ? ip_set_timeout_get(timeout) |
| 455 | : *timeout))) |
| 456 | return -EMSGSIZE; |
| 457 | } |
| 458 | if (SET_WITH_COUNTER(set) && |
| 459 | ip_set_put_counter(skb, ext_counter(e, set))) |
| 460 | return -EMSGSIZE; |
| 461 | if (SET_WITH_COMMENT(set) && |
| 462 | ip_set_put_comment(skb, ext_comment(e, set))) |
| 463 | return -EMSGSIZE; |
| 464 | if (SET_WITH_SKBINFO(set) && |
| 465 | ip_set_put_skbinfo(skb, ext_skbinfo(e, set))) |
| 466 | return -EMSGSIZE; |
| 467 | return 0; |
| 468 | } |
| 469 | EXPORT_SYMBOL_GPL(ip_set_put_extensions); |
| 470 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 471 | /* Creating/destroying/renaming/swapping affect the existence and |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 472 | * the properties of a set. All of these can be executed from userspace |
| 473 | * only and serialized by the nfnl mutex indirectly from nfnetlink. |
| 474 | * |
| 475 | * Sets are identified by their index in ip_set_list and the index |
| 476 | * is used by the external references (set/SET netfilter modules). |
| 477 | * |
| 478 | * The set behind an index may change by swapping only, from userspace. |
| 479 | */ |
| 480 | |
| 481 | static inline void |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 482 | __ip_set_get(struct ip_set *set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 483 | { |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 484 | write_lock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 485 | set->ref++; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 486 | write_unlock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | static inline void |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 490 | __ip_set_put(struct ip_set *set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 491 | { |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 492 | write_lock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 493 | BUG_ON(set->ref == 0); |
| 494 | set->ref--; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 495 | write_unlock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 496 | } |
| 497 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 498 | /* Add, del and test set entries from kernel. |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 499 | * |
| 500 | * The set behind the index must exist and must be referenced |
| 501 | * so it can't be destroyed (or changed) under our foot. |
| 502 | */ |
| 503 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 504 | static inline struct ip_set * |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 505 | ip_set_rcu_get(struct net *net, ip_set_id_t index) |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 506 | { |
| 507 | struct ip_set *set; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 508 | struct ip_set_net *inst = ip_set_pernet(net); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 509 | |
| 510 | rcu_read_lock(); |
| 511 | /* ip_set_list itself needs to be protected */ |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 512 | set = rcu_dereference(inst->ip_set_list)[index]; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 513 | rcu_read_unlock(); |
| 514 | |
| 515 | return set; |
| 516 | } |
| 517 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 518 | int |
| 519 | ip_set_test(ip_set_id_t index, const struct sk_buff *skb, |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 520 | const struct xt_action_param *par, struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 521 | { |
Eric W. Biederman | 686c9b5 | 2015-09-18 14:32:59 -0500 | [diff] [blame^] | 522 | struct ip_set *set = ip_set_rcu_get(par->net, index); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 523 | int ret = 0; |
| 524 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 525 | BUG_ON(!set); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 526 | pr_debug("set %s, index %u\n", set->name, index); |
| 527 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 528 | if (opt->dim < set->type->dimension || |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 529 | !(opt->family == set->family || set->family == NFPROTO_UNSPEC)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 530 | return 0; |
| 531 | |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 532 | rcu_read_lock_bh(); |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 533 | ret = set->variant->kadt(set, skb, par, IPSET_TEST, opt); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 534 | rcu_read_unlock_bh(); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 535 | |
| 536 | if (ret == -EAGAIN) { |
| 537 | /* Type requests element to be completed */ |
Masanari Iida | 1a84db5 | 2014-08-29 23:37:33 +0900 | [diff] [blame] | 538 | pr_debug("element must be completed, ADD is triggered\n"); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 539 | spin_lock_bh(&set->lock); |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 540 | set->variant->kadt(set, skb, par, IPSET_ADD, opt); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 541 | spin_unlock_bh(&set->lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 542 | ret = 1; |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 543 | } else { |
| 544 | /* --return-nomatch: invert matched element */ |
Jozsef Kadlecsik | 6e01781 | 2013-04-27 14:40:50 +0200 | [diff] [blame] | 545 | if ((opt->cmdflags & IPSET_FLAG_RETURN_NOMATCH) && |
Jozsef Kadlecsik | 3e0304a | 2012-09-21 22:02:36 +0200 | [diff] [blame] | 546 | (set->type->features & IPSET_TYPE_NOMATCH) && |
| 547 | (ret > 0 || ret == -ENOTEMPTY)) |
| 548 | ret = -ret; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | /* Convert error codes to nomatch */ |
| 552 | return (ret < 0 ? 0 : ret); |
| 553 | } |
| 554 | EXPORT_SYMBOL_GPL(ip_set_test); |
| 555 | |
| 556 | int |
| 557 | ip_set_add(ip_set_id_t index, const struct sk_buff *skb, |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 558 | const struct xt_action_param *par, struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 559 | { |
Eric W. Biederman | 686c9b5 | 2015-09-18 14:32:59 -0500 | [diff] [blame^] | 560 | struct ip_set *set = ip_set_rcu_get(par->net, index); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 561 | int ret; |
| 562 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 563 | BUG_ON(!set); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 564 | pr_debug("set %s, index %u\n", set->name, index); |
| 565 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 566 | if (opt->dim < set->type->dimension || |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 567 | !(opt->family == set->family || set->family == NFPROTO_UNSPEC)) |
Sergey Popovich | 35f6e63 | 2013-11-07 12:56:45 +0200 | [diff] [blame] | 568 | return -IPSET_ERR_TYPE_MISMATCH; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 569 | |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 570 | spin_lock_bh(&set->lock); |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 571 | ret = set->variant->kadt(set, skb, par, IPSET_ADD, opt); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 572 | spin_unlock_bh(&set->lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 573 | |
| 574 | return ret; |
| 575 | } |
| 576 | EXPORT_SYMBOL_GPL(ip_set_add); |
| 577 | |
| 578 | int |
| 579 | ip_set_del(ip_set_id_t index, const struct sk_buff *skb, |
Jozsef Kadlecsik | 075e64c | 2013-04-27 14:28:55 +0200 | [diff] [blame] | 580 | const struct xt_action_param *par, struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 581 | { |
Eric W. Biederman | 686c9b5 | 2015-09-18 14:32:59 -0500 | [diff] [blame^] | 582 | struct ip_set *set = ip_set_rcu_get(par->net, index); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 583 | int ret = 0; |
| 584 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 585 | BUG_ON(!set); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 586 | pr_debug("set %s, index %u\n", set->name, index); |
| 587 | |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 588 | if (opt->dim < set->type->dimension || |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 589 | !(opt->family == set->family || set->family == NFPROTO_UNSPEC)) |
Sergey Popovich | 35f6e63 | 2013-11-07 12:56:45 +0200 | [diff] [blame] | 590 | return -IPSET_ERR_TYPE_MISMATCH; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 591 | |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 592 | spin_lock_bh(&set->lock); |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 593 | ret = set->variant->kadt(set, skb, par, IPSET_DEL, opt); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 594 | spin_unlock_bh(&set->lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 595 | |
| 596 | return ret; |
| 597 | } |
| 598 | EXPORT_SYMBOL_GPL(ip_set_del); |
| 599 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 600 | /* Find set by name, reference it once. The reference makes sure the |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 601 | * thing pointed to, does not go away under our feet. |
| 602 | * |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 603 | */ |
| 604 | ip_set_id_t |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 605 | ip_set_get_byname(struct net *net, const char *name, struct ip_set **set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 606 | { |
| 607 | ip_set_id_t i, index = IPSET_INVALID_ID; |
| 608 | struct ip_set *s; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 609 | struct ip_set_net *inst = ip_set_pernet(net); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 610 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 611 | rcu_read_lock(); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 612 | for (i = 0; i < inst->ip_set_max; i++) { |
| 613 | s = rcu_dereference(inst->ip_set_list)[i]; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 614 | if (s && STRNCMP(s->name, name)) { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 615 | __ip_set_get(s); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 616 | index = i; |
| 617 | *set = s; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 618 | break; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 619 | } |
| 620 | } |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 621 | rcu_read_unlock(); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 622 | |
| 623 | return index; |
| 624 | } |
| 625 | EXPORT_SYMBOL_GPL(ip_set_get_byname); |
| 626 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 627 | /* If the given set pointer points to a valid set, decrement |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 628 | * reference count by 1. The caller shall not assume the index |
| 629 | * to be valid, after calling this function. |
| 630 | * |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 631 | */ |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 632 | |
| 633 | static inline void |
| 634 | __ip_set_put_byindex(struct ip_set_net *inst, ip_set_id_t index) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 635 | { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 636 | struct ip_set *set; |
| 637 | |
| 638 | rcu_read_lock(); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 639 | set = rcu_dereference(inst->ip_set_list)[index]; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 640 | if (set) |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 641 | __ip_set_put(set); |
| 642 | rcu_read_unlock(); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 643 | } |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 644 | |
| 645 | void |
| 646 | ip_set_put_byindex(struct net *net, ip_set_id_t index) |
| 647 | { |
| 648 | struct ip_set_net *inst = ip_set_pernet(net); |
| 649 | |
| 650 | __ip_set_put_byindex(inst, index); |
| 651 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 652 | EXPORT_SYMBOL_GPL(ip_set_put_byindex); |
| 653 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 654 | /* Get the name of a set behind a set index. |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 655 | * We assume the set is referenced, so it does exist and |
| 656 | * can't be destroyed. The set cannot be renamed due to |
| 657 | * the referencing either. |
| 658 | * |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 659 | */ |
| 660 | const char * |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 661 | ip_set_name_byindex(struct net *net, ip_set_id_t index) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 662 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 663 | const struct ip_set *set = ip_set_rcu_get(net, index); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 664 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 665 | BUG_ON(!set); |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 666 | BUG_ON(set->ref == 0); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 667 | |
| 668 | /* Referenced, so it's safe */ |
| 669 | return set->name; |
| 670 | } |
| 671 | EXPORT_SYMBOL_GPL(ip_set_name_byindex); |
| 672 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 673 | /* Routines to call by external subsystems, which do not |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 674 | * call nfnl_lock for us. |
| 675 | */ |
| 676 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 677 | /* Find set by index, reference it once. The reference makes sure the |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 678 | * thing pointed to, does not go away under our feet. |
| 679 | * |
| 680 | * The nfnl mutex is used in the function. |
| 681 | */ |
| 682 | ip_set_id_t |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 683 | ip_set_nfnl_get_byindex(struct net *net, ip_set_id_t index) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 684 | { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 685 | struct ip_set *set; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 686 | struct ip_set_net *inst = ip_set_pernet(net); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 687 | |
Dan Carpenter | 0f9f5e1 | 2014-10-21 11:28:12 +0300 | [diff] [blame] | 688 | if (index >= inst->ip_set_max) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 689 | return IPSET_INVALID_ID; |
| 690 | |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 691 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 692 | set = ip_set(inst, index); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 693 | if (set) |
| 694 | __ip_set_get(set); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 695 | else |
| 696 | index = IPSET_INVALID_ID; |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 697 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 698 | |
| 699 | return index; |
| 700 | } |
| 701 | EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex); |
| 702 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 703 | /* If the given set pointer points to a valid set, decrement |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 704 | * reference count by 1. The caller shall not assume the index |
| 705 | * to be valid, after calling this function. |
| 706 | * |
| 707 | * The nfnl mutex is used in the function. |
| 708 | */ |
| 709 | void |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 710 | ip_set_nfnl_put(struct net *net, ip_set_id_t index) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 711 | { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 712 | struct ip_set *set; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 713 | struct ip_set_net *inst = ip_set_pernet(net); |
| 714 | |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 715 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 716 | if (!inst->is_deleted) { /* already deleted from ip_set_net_exit() */ |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 717 | set = ip_set(inst, index); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 718 | if (set) |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 719 | __ip_set_put(set); |
| 720 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 721 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 722 | } |
| 723 | EXPORT_SYMBOL_GPL(ip_set_nfnl_put); |
| 724 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 725 | /* Communication protocol with userspace over netlink. |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 726 | * |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 727 | * The commands are serialized by the nfnl mutex. |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 728 | */ |
| 729 | |
| 730 | static inline bool |
| 731 | protocol_failed(const struct nlattr * const tb[]) |
| 732 | { |
| 733 | return !tb[IPSET_ATTR_PROTOCOL] || |
| 734 | nla_get_u8(tb[IPSET_ATTR_PROTOCOL]) != IPSET_PROTOCOL; |
| 735 | } |
| 736 | |
| 737 | static inline u32 |
| 738 | flag_exist(const struct nlmsghdr *nlh) |
| 739 | { |
| 740 | return nlh->nlmsg_flags & NLM_F_EXCL ? 0 : IPSET_FLAG_EXIST; |
| 741 | } |
| 742 | |
| 743 | static struct nlmsghdr * |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 744 | start_msg(struct sk_buff *skb, u32 portid, u32 seq, unsigned int flags, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 745 | enum ipset_cmd cmd) |
| 746 | { |
| 747 | struct nlmsghdr *nlh; |
| 748 | struct nfgenmsg *nfmsg; |
| 749 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 750 | nlh = nlmsg_put(skb, portid, seq, cmd | (NFNL_SUBSYS_IPSET << 8), |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 751 | sizeof(*nfmsg), flags); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 752 | if (!nlh) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 753 | return NULL; |
| 754 | |
| 755 | nfmsg = nlmsg_data(nlh); |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 756 | nfmsg->nfgen_family = NFPROTO_IPV4; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 757 | nfmsg->version = NFNETLINK_V0; |
| 758 | nfmsg->res_id = 0; |
| 759 | |
| 760 | return nlh; |
| 761 | } |
| 762 | |
| 763 | /* Create a set */ |
| 764 | |
| 765 | static const struct nla_policy ip_set_create_policy[IPSET_ATTR_CMD_MAX + 1] = { |
| 766 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, |
| 767 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, |
| 768 | .len = IPSET_MAXNAMELEN - 1 }, |
| 769 | [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING, |
| 770 | .len = IPSET_MAXNAMELEN - 1}, |
| 771 | [IPSET_ATTR_REVISION] = { .type = NLA_U8 }, |
| 772 | [IPSET_ATTR_FAMILY] = { .type = NLA_U8 }, |
| 773 | [IPSET_ATTR_DATA] = { .type = NLA_NESTED }, |
| 774 | }; |
| 775 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 776 | static struct ip_set * |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 777 | find_set_and_id(struct ip_set_net *inst, const char *name, ip_set_id_t *id) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 778 | { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 779 | struct ip_set *set = NULL; |
| 780 | ip_set_id_t i; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 781 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 782 | *id = IPSET_INVALID_ID; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 783 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 784 | set = ip_set(inst, i); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 785 | if (set && STRNCMP(set->name, name)) { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 786 | *id = i; |
| 787 | break; |
| 788 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 789 | } |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 790 | return (*id == IPSET_INVALID_ID ? NULL : set); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 791 | } |
| 792 | |
| 793 | static inline struct ip_set * |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 794 | find_set(struct ip_set_net *inst, const char *name) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 795 | { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 796 | ip_set_id_t id; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 797 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 798 | return find_set_and_id(inst, name, &id); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | static int |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 802 | find_free_id(struct ip_set_net *inst, const char *name, ip_set_id_t *index, |
| 803 | struct ip_set **set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 804 | { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 805 | struct ip_set *s; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 806 | ip_set_id_t i; |
| 807 | |
| 808 | *index = IPSET_INVALID_ID; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 809 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 810 | s = ip_set(inst, i); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 811 | if (!s) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 812 | if (*index == IPSET_INVALID_ID) |
| 813 | *index = i; |
Jozsef Kadlecsik | 22496f09 | 2015-05-02 19:27:58 +0200 | [diff] [blame] | 814 | } else if (STRNCMP(name, s->name)) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 815 | /* Name clash */ |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 816 | *set = s; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 817 | return -EEXIST; |
| 818 | } |
| 819 | } |
| 820 | if (*index == IPSET_INVALID_ID) |
| 821 | /* No free slot remained */ |
| 822 | return -IPSET_ERR_MAX_SETS; |
| 823 | return 0; |
| 824 | } |
| 825 | |
| 826 | static int |
Tomasz Bursztyka | d31f4d4 | 2012-06-28 02:57:48 +0000 | [diff] [blame] | 827 | ip_set_none(struct sock *ctnl, struct sk_buff *skb, |
| 828 | const struct nlmsghdr *nlh, |
| 829 | const struct nlattr * const attr[]) |
| 830 | { |
| 831 | return -EOPNOTSUPP; |
| 832 | } |
| 833 | |
| 834 | static int |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 835 | ip_set_create(struct sock *ctnl, struct sk_buff *skb, |
| 836 | const struct nlmsghdr *nlh, |
| 837 | const struct nlattr * const attr[]) |
| 838 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 839 | struct net *net = sock_net(ctnl); |
| 840 | struct ip_set_net *inst = ip_set_pernet(net); |
Shan Wei | 9846ada | 2011-03-08 15:37:27 +0100 | [diff] [blame] | 841 | struct ip_set *set, *clash = NULL; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 842 | ip_set_id_t index = IPSET_INVALID_ID; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 843 | struct nlattr *tb[IPSET_ATTR_CREATE_MAX + 1] = {}; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 844 | const char *name, *typename; |
| 845 | u8 family, revision; |
| 846 | u32 flags = flag_exist(nlh); |
| 847 | int ret = 0; |
| 848 | |
| 849 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 850 | !attr[IPSET_ATTR_SETNAME] || |
| 851 | !attr[IPSET_ATTR_TYPENAME] || |
| 852 | !attr[IPSET_ATTR_REVISION] || |
| 853 | !attr[IPSET_ATTR_FAMILY] || |
| 854 | (attr[IPSET_ATTR_DATA] && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 855 | !flag_nested(attr[IPSET_ATTR_DATA])))) |
| 856 | return -IPSET_ERR_PROTOCOL; |
| 857 | |
| 858 | name = nla_data(attr[IPSET_ATTR_SETNAME]); |
| 859 | typename = nla_data(attr[IPSET_ATTR_TYPENAME]); |
| 860 | family = nla_get_u8(attr[IPSET_ATTR_FAMILY]); |
| 861 | revision = nla_get_u8(attr[IPSET_ATTR_REVISION]); |
| 862 | pr_debug("setname: %s, typename: %s, family: %s, revision: %u\n", |
| 863 | name, typename, family_name(family), revision); |
| 864 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 865 | /* First, and without any locks, allocate and initialize |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 866 | * a normal base set structure. |
| 867 | */ |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 868 | set = kzalloc(sizeof(*set), GFP_KERNEL); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 869 | if (!set) |
| 870 | return -ENOMEM; |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 871 | spin_lock_init(&set->lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 872 | strlcpy(set->name, name, IPSET_MAXNAMELEN); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 873 | set->family = family; |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 874 | set->revision = revision; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 875 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 876 | /* Next, check that we know the type, and take |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 877 | * a reference on the type, to make sure it stays available |
| 878 | * while constructing our new set. |
| 879 | * |
| 880 | * After referencing the type, we try to create the type |
| 881 | * specific part of the set without holding any locks. |
| 882 | */ |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 883 | ret = find_set_type_get(typename, family, revision, &set->type); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 884 | if (ret) |
| 885 | goto out; |
| 886 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 887 | /* Without holding any locks, create private part. */ |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 888 | if (attr[IPSET_ATTR_DATA] && |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 889 | nla_parse_nested(tb, IPSET_ATTR_CREATE_MAX, attr[IPSET_ATTR_DATA], |
| 890 | set->type->create_policy)) { |
Jozsef Kadlecsik | 15b4d93 | 2011-06-16 19:01:26 +0200 | [diff] [blame] | 891 | ret = -IPSET_ERR_PROTOCOL; |
| 892 | goto put_out; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 893 | } |
| 894 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 895 | ret = set->type->create(net, set, tb, flags); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 896 | if (ret != 0) |
| 897 | goto put_out; |
| 898 | |
| 899 | /* BTW, ret==0 here. */ |
| 900 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 901 | /* Here, we have a valid, constructed set and we are protected |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 902 | * by the nfnl mutex. Find the first free index in ip_set_list |
| 903 | * and check clashing. |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 904 | */ |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 905 | ret = find_free_id(inst, set->name, &index, &clash); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 906 | if (ret == -EEXIST) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 907 | /* If this is the same set and requested, ignore error */ |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 908 | if ((flags & IPSET_FLAG_EXIST) && |
Jozsef Kadlecsik | 22496f09 | 2015-05-02 19:27:58 +0200 | [diff] [blame] | 909 | STRNCMP(set->type->name, clash->type->name) && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 910 | set->type->family == clash->type->family && |
Jozsef Kadlecsik | f1e00b3 | 2011-06-16 18:51:41 +0200 | [diff] [blame] | 911 | set->type->revision_min == clash->type->revision_min && |
| 912 | set->type->revision_max == clash->type->revision_max && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 913 | set->variant->same_set(set, clash)) |
| 914 | ret = 0; |
| 915 | goto cleanup; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 916 | } else if (ret == -IPSET_ERR_MAX_SETS) { |
| 917 | struct ip_set **list, **tmp; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 918 | ip_set_id_t i = inst->ip_set_max + IP_SET_INC; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 919 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 920 | if (i < inst->ip_set_max || i == IPSET_INVALID_ID) |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 921 | /* Wraparound */ |
| 922 | goto cleanup; |
| 923 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 924 | list = kcalloc(i, sizeof(struct ip_set *), GFP_KERNEL); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 925 | if (!list) |
| 926 | goto cleanup; |
| 927 | /* nfnl mutex is held, both lists are valid */ |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 928 | tmp = ip_set_dereference(inst->ip_set_list); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 929 | memcpy(list, tmp, sizeof(struct ip_set *) * inst->ip_set_max); |
| 930 | rcu_assign_pointer(inst->ip_set_list, list); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 931 | /* Make sure all current packets have passed through */ |
| 932 | synchronize_net(); |
| 933 | /* Use new list */ |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 934 | index = inst->ip_set_max; |
| 935 | inst->ip_set_max = i; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 936 | kfree(tmp); |
| 937 | ret = 0; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 938 | } else if (ret) { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 939 | goto cleanup; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 940 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 941 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 942 | /* Finally! Add our shiny new set to the list, and be done. */ |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 943 | pr_debug("create: '%s' created with index %u!\n", set->name, index); |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 944 | ip_set(inst, index) = set; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 945 | |
| 946 | return ret; |
| 947 | |
| 948 | cleanup: |
| 949 | set->variant->destroy(set); |
| 950 | put_out: |
| 951 | module_put(set->type->me); |
| 952 | out: |
| 953 | kfree(set); |
| 954 | return ret; |
| 955 | } |
| 956 | |
| 957 | /* Destroy sets */ |
| 958 | |
| 959 | static const struct nla_policy |
| 960 | ip_set_setname_policy[IPSET_ATTR_CMD_MAX + 1] = { |
| 961 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, |
| 962 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, |
| 963 | .len = IPSET_MAXNAMELEN - 1 }, |
| 964 | }; |
| 965 | |
| 966 | static void |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 967 | ip_set_destroy_set(struct ip_set *set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 968 | { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 969 | pr_debug("set: %s\n", set->name); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 970 | |
| 971 | /* Must call it without holding any lock */ |
| 972 | set->variant->destroy(set); |
| 973 | module_put(set->type->me); |
| 974 | kfree(set); |
| 975 | } |
| 976 | |
| 977 | static int |
| 978 | ip_set_destroy(struct sock *ctnl, struct sk_buff *skb, |
| 979 | const struct nlmsghdr *nlh, |
| 980 | const struct nlattr * const attr[]) |
| 981 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 982 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 983 | struct ip_set *s; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 984 | ip_set_id_t i; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 985 | int ret = 0; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 986 | |
| 987 | if (unlikely(protocol_failed(attr))) |
| 988 | return -IPSET_ERR_PROTOCOL; |
| 989 | |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 990 | /* Commands are serialized and references are |
| 991 | * protected by the ip_set_ref_lock. |
| 992 | * External systems (i.e. xt_set) must call |
| 993 | * ip_set_put|get_nfnl_* functions, that way we |
| 994 | * can safely check references here. |
| 995 | * |
| 996 | * list:set timer can only decrement the reference |
| 997 | * counter, so if it's already zero, we can proceed |
| 998 | * without holding the lock. |
| 999 | */ |
| 1000 | read_lock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1001 | if (!attr[IPSET_ATTR_SETNAME]) { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1002 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1003 | s = ip_set(inst, i); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1004 | if (s && s->ref) { |
Jozsef Kadlecsik | 9d88323 | 2011-06-16 18:57:44 +0200 | [diff] [blame] | 1005 | ret = -IPSET_ERR_BUSY; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1006 | goto out; |
| 1007 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1008 | } |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1009 | inst->is_destroyed = true; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1010 | read_unlock_bh(&ip_set_ref_lock); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1011 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1012 | s = ip_set(inst, i); |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1013 | if (s) { |
| 1014 | ip_set(inst, i) = NULL; |
| 1015 | ip_set_destroy_set(s); |
| 1016 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1017 | } |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1018 | /* Modified by ip_set_destroy() only, which is serialized */ |
| 1019 | inst->is_destroyed = false; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1020 | } else { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1021 | s = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), |
| 1022 | &i); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1023 | if (!s) { |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1024 | ret = -ENOENT; |
| 1025 | goto out; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1026 | } else if (s->ref) { |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1027 | ret = -IPSET_ERR_BUSY; |
| 1028 | goto out; |
| 1029 | } |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1030 | ip_set(inst, i) = NULL; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1031 | read_unlock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1032 | |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1033 | ip_set_destroy_set(s); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1034 | } |
| 1035 | return 0; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1036 | out: |
| 1037 | read_unlock_bh(&ip_set_ref_lock); |
| 1038 | return ret; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | /* Flush sets */ |
| 1042 | |
| 1043 | static void |
| 1044 | ip_set_flush_set(struct ip_set *set) |
| 1045 | { |
| 1046 | pr_debug("set: %s\n", set->name); |
| 1047 | |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1048 | spin_lock_bh(&set->lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1049 | set->variant->flush(set); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1050 | spin_unlock_bh(&set->lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1051 | } |
| 1052 | |
| 1053 | static int |
| 1054 | ip_set_flush(struct sock *ctnl, struct sk_buff *skb, |
| 1055 | const struct nlmsghdr *nlh, |
| 1056 | const struct nlattr * const attr[]) |
| 1057 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1058 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1059 | struct ip_set *s; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1060 | ip_set_id_t i; |
| 1061 | |
| 1062 | if (unlikely(protocol_failed(attr))) |
Jozsef Kadlecsik | 9184a9c | 2011-05-24 10:20:19 +0200 | [diff] [blame] | 1063 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1064 | |
| 1065 | if (!attr[IPSET_ATTR_SETNAME]) { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1066 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1067 | s = ip_set(inst, i); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1068 | if (s) |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1069 | ip_set_flush_set(s); |
| 1070 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1071 | } else { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1072 | s = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1073 | if (!s) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1074 | return -ENOENT; |
| 1075 | |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1076 | ip_set_flush_set(s); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | /* Rename a set */ |
| 1083 | |
| 1084 | static const struct nla_policy |
| 1085 | ip_set_setname2_policy[IPSET_ATTR_CMD_MAX + 1] = { |
| 1086 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, |
| 1087 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, |
| 1088 | .len = IPSET_MAXNAMELEN - 1 }, |
| 1089 | [IPSET_ATTR_SETNAME2] = { .type = NLA_NUL_STRING, |
| 1090 | .len = IPSET_MAXNAMELEN - 1 }, |
| 1091 | }; |
| 1092 | |
| 1093 | static int |
| 1094 | ip_set_rename(struct sock *ctnl, struct sk_buff *skb, |
| 1095 | const struct nlmsghdr *nlh, |
| 1096 | const struct nlattr * const attr[]) |
| 1097 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1098 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1099 | struct ip_set *set, *s; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1100 | const char *name2; |
| 1101 | ip_set_id_t i; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1102 | int ret = 0; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1103 | |
| 1104 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1105 | !attr[IPSET_ATTR_SETNAME] || |
| 1106 | !attr[IPSET_ATTR_SETNAME2])) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1107 | return -IPSET_ERR_PROTOCOL; |
| 1108 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1109 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1110 | if (!set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1111 | return -ENOENT; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1112 | |
| 1113 | read_lock_bh(&ip_set_ref_lock); |
| 1114 | if (set->ref != 0) { |
| 1115 | ret = -IPSET_ERR_REFERENCED; |
| 1116 | goto out; |
| 1117 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1118 | |
| 1119 | name2 = nla_data(attr[IPSET_ATTR_SETNAME2]); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1120 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1121 | s = ip_set(inst, i); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1122 | if (s && STRNCMP(s->name, name2)) { |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1123 | ret = -IPSET_ERR_EXIST_SETNAME2; |
| 1124 | goto out; |
| 1125 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1126 | } |
| 1127 | strncpy(set->name, name2, IPSET_MAXNAMELEN); |
| 1128 | |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1129 | out: |
| 1130 | read_unlock_bh(&ip_set_ref_lock); |
| 1131 | return ret; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1132 | } |
| 1133 | |
| 1134 | /* Swap two sets so that name/index points to the other. |
| 1135 | * References and set names are also swapped. |
| 1136 | * |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1137 | * The commands are serialized by the nfnl mutex and references are |
| 1138 | * protected by the ip_set_ref_lock. The kernel interfaces |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1139 | * do not hold the mutex but the pointer settings are atomic |
| 1140 | * so the ip_set_list always contains valid pointers to the sets. |
| 1141 | */ |
| 1142 | |
| 1143 | static int |
| 1144 | ip_set_swap(struct sock *ctnl, struct sk_buff *skb, |
| 1145 | const struct nlmsghdr *nlh, |
| 1146 | const struct nlattr * const attr[]) |
| 1147 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1148 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1149 | struct ip_set *from, *to; |
| 1150 | ip_set_id_t from_id, to_id; |
| 1151 | char from_name[IPSET_MAXNAMELEN]; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1152 | |
| 1153 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1154 | !attr[IPSET_ATTR_SETNAME] || |
| 1155 | !attr[IPSET_ATTR_SETNAME2])) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1156 | return -IPSET_ERR_PROTOCOL; |
| 1157 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1158 | from = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), |
| 1159 | &from_id); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1160 | if (!from) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1161 | return -ENOENT; |
| 1162 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1163 | to = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME2]), |
| 1164 | &to_id); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1165 | if (!to) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1166 | return -IPSET_ERR_EXIST_SETNAME2; |
| 1167 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1168 | /* Features must not change. |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1169 | * Not an artifical restriction anymore, as we must prevent |
| 1170 | * possible loops created by swapping in setlist type of sets. |
| 1171 | */ |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1172 | if (!(from->type->features == to->type->features && |
Jozsef Kadlecsik | 169faa2 | 2013-09-16 20:07:35 +0200 | [diff] [blame] | 1173 | from->family == to->family)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1174 | return -IPSET_ERR_TYPE_MISMATCH; |
| 1175 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1176 | strncpy(from_name, from->name, IPSET_MAXNAMELEN); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1177 | strncpy(from->name, to->name, IPSET_MAXNAMELEN); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1178 | strncpy(to->name, from_name, IPSET_MAXNAMELEN); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1179 | |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1180 | write_lock_bh(&ip_set_ref_lock); |
| 1181 | swap(from->ref, to->ref); |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1182 | ip_set(inst, from_id) = to; |
| 1183 | ip_set(inst, to_id) = from; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 1184 | write_unlock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1185 | |
| 1186 | return 0; |
| 1187 | } |
| 1188 | |
| 1189 | /* List/save set data */ |
| 1190 | |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1191 | #define DUMP_INIT 0 |
| 1192 | #define DUMP_ALL 1 |
| 1193 | #define DUMP_ONE 2 |
| 1194 | #define DUMP_LAST 3 |
| 1195 | |
| 1196 | #define DUMP_TYPE(arg) (((u32)(arg)) & 0x0000FFFF) |
| 1197 | #define DUMP_FLAGS(arg) (((u32)(arg)) >> 16) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1198 | |
| 1199 | static int |
| 1200 | ip_set_dump_done(struct netlink_callback *cb) |
| 1201 | { |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1202 | if (cb->args[IPSET_CB_ARG0]) { |
Jozsef Kadlecsik | c4c9978 | 2015-06-13 11:59:45 +0200 | [diff] [blame] | 1203 | struct ip_set_net *inst = |
| 1204 | (struct ip_set_net *)cb->args[IPSET_CB_NET]; |
| 1205 | ip_set_id_t index = (ip_set_id_t)cb->args[IPSET_CB_INDEX]; |
| 1206 | struct ip_set *set = ip_set(inst, index); |
| 1207 | |
| 1208 | if (set->variant->uref) |
| 1209 | set->variant->uref(set, cb, false); |
| 1210 | pr_debug("release set %s\n", set->name); |
| 1211 | __ip_set_put_byindex(inst, index); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1212 | } |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | static inline void |
| 1217 | dump_attrs(struct nlmsghdr *nlh) |
| 1218 | { |
| 1219 | const struct nlattr *attr; |
| 1220 | int rem; |
| 1221 | |
| 1222 | pr_debug("dump nlmsg\n"); |
| 1223 | nlmsg_for_each_attr(attr, nlh, sizeof(struct nfgenmsg), rem) { |
| 1224 | pr_debug("type: %u, len %u\n", nla_type(attr), attr->nla_len); |
| 1225 | } |
| 1226 | } |
| 1227 | |
| 1228 | static int |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1229 | dump_init(struct netlink_callback *cb, struct ip_set_net *inst) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1230 | { |
| 1231 | struct nlmsghdr *nlh = nlmsg_hdr(cb->skb); |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 1232 | int min_len = nlmsg_total_size(sizeof(struct nfgenmsg)); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1233 | struct nlattr *cda[IPSET_ATTR_CMD_MAX + 1]; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1234 | struct nlattr *attr = (void *)nlh + min_len; |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1235 | u32 dump_type; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1236 | ip_set_id_t index; |
| 1237 | |
| 1238 | /* Second pass, so parser can't fail */ |
| 1239 | nla_parse(cda, IPSET_ATTR_CMD_MAX, |
| 1240 | attr, nlh->nlmsg_len - min_len, ip_set_setname_policy); |
| 1241 | |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1242 | if (cda[IPSET_ATTR_SETNAME]) { |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1243 | struct ip_set *set; |
| 1244 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1245 | set = find_set_and_id(inst, nla_data(cda[IPSET_ATTR_SETNAME]), |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1246 | &index); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1247 | if (!set) |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1248 | return -ENOENT; |
| 1249 | |
| 1250 | dump_type = DUMP_ONE; |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1251 | cb->args[IPSET_CB_INDEX] = index; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1252 | } else { |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1253 | dump_type = DUMP_ALL; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1254 | } |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1255 | |
| 1256 | if (cda[IPSET_ATTR_FLAGS]) { |
| 1257 | u32 f = ip_set_get_h32(cda[IPSET_ATTR_FLAGS]); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1258 | |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1259 | dump_type |= (f << 16); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1260 | } |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1261 | cb->args[IPSET_CB_NET] = (unsigned long)inst; |
| 1262 | cb->args[IPSET_CB_DUMP] = dump_type; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1263 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1264 | return 0; |
| 1265 | } |
| 1266 | |
| 1267 | static int |
| 1268 | ip_set_dump_start(struct sk_buff *skb, struct netlink_callback *cb) |
| 1269 | { |
| 1270 | ip_set_id_t index = IPSET_INVALID_ID, max; |
| 1271 | struct ip_set *set = NULL; |
| 1272 | struct nlmsghdr *nlh = NULL; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1273 | unsigned int flags = NETLINK_CB(cb->skb).portid ? NLM_F_MULTI : 0; |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1274 | struct ip_set_net *inst = ip_set_pernet(sock_net(skb->sk)); |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1275 | u32 dump_type, dump_flags; |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1276 | bool is_destroyed; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1277 | int ret = 0; |
| 1278 | |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1279 | if (!cb->args[IPSET_CB_DUMP]) { |
| 1280 | ret = dump_init(cb, inst); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1281 | if (ret < 0) { |
| 1282 | nlh = nlmsg_hdr(cb->skb); |
| 1283 | /* We have to create and send the error message |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1284 | * manually :-( |
| 1285 | */ |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1286 | if (nlh->nlmsg_flags & NLM_F_ACK) |
| 1287 | netlink_ack(cb->skb, nlh, ret); |
| 1288 | return ret; |
| 1289 | } |
| 1290 | } |
| 1291 | |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1292 | if (cb->args[IPSET_CB_INDEX] >= inst->ip_set_max) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1293 | goto out; |
| 1294 | |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1295 | dump_type = DUMP_TYPE(cb->args[IPSET_CB_DUMP]); |
| 1296 | dump_flags = DUMP_FLAGS(cb->args[IPSET_CB_DUMP]); |
| 1297 | max = dump_type == DUMP_ONE ? cb->args[IPSET_CB_INDEX] + 1 |
| 1298 | : inst->ip_set_max; |
Jozsef Kadlecsik | a8a8a09 | 2011-04-19 15:59:15 +0200 | [diff] [blame] | 1299 | dump_last: |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1300 | pr_debug("dump type, flag: %u %u index: %ld\n", |
| 1301 | dump_type, dump_flags, cb->args[IPSET_CB_INDEX]); |
| 1302 | for (; cb->args[IPSET_CB_INDEX] < max; cb->args[IPSET_CB_INDEX]++) { |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1303 | index = (ip_set_id_t)cb->args[IPSET_CB_INDEX]; |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1304 | write_lock_bh(&ip_set_ref_lock); |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1305 | set = ip_set(inst, index); |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1306 | is_destroyed = inst->is_destroyed; |
| 1307 | if (!set || is_destroyed) { |
| 1308 | write_unlock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1309 | if (dump_type == DUMP_ONE) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1310 | ret = -ENOENT; |
| 1311 | goto out; |
| 1312 | } |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1313 | if (is_destroyed) { |
| 1314 | /* All sets are just being destroyed */ |
| 1315 | ret = 0; |
| 1316 | goto out; |
| 1317 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1318 | continue; |
| 1319 | } |
| 1320 | /* When dumping all sets, we must dump "sorted" |
| 1321 | * so that lists (unions of sets) are dumped last. |
| 1322 | */ |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1323 | if (dump_type != DUMP_ONE && |
| 1324 | ((dump_type == DUMP_ALL) == |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1325 | !!(set->type->features & IPSET_DUMP_LAST))) { |
| 1326 | write_unlock_bh(&ip_set_ref_lock); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1327 | continue; |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1328 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1329 | pr_debug("List set: %s\n", set->name); |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1330 | if (!cb->args[IPSET_CB_ARG0]) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1331 | /* Start listing: make sure set won't be destroyed */ |
| 1332 | pr_debug("reference set\n"); |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1333 | set->ref++; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1334 | } |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 1335 | write_unlock_bh(&ip_set_ref_lock); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1336 | nlh = start_msg(skb, NETLINK_CB(cb->skb).portid, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1337 | cb->nlh->nlmsg_seq, flags, |
| 1338 | IPSET_CMD_LIST); |
| 1339 | if (!nlh) { |
| 1340 | ret = -EMSGSIZE; |
| 1341 | goto release_refcount; |
| 1342 | } |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 1343 | if (nla_put_u8(skb, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL) || |
| 1344 | nla_put_string(skb, IPSET_ATTR_SETNAME, set->name)) |
| 1345 | goto nla_put_failure; |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1346 | if (dump_flags & IPSET_FLAG_LIST_SETNAME) |
| 1347 | goto next_set; |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1348 | switch (cb->args[IPSET_CB_ARG0]) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1349 | case 0: |
| 1350 | /* Core header data */ |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 1351 | if (nla_put_string(skb, IPSET_ATTR_TYPENAME, |
| 1352 | set->type->name) || |
| 1353 | nla_put_u8(skb, IPSET_ATTR_FAMILY, |
| 1354 | set->family) || |
| 1355 | nla_put_u8(skb, IPSET_ATTR_REVISION, |
| 1356 | set->revision)) |
| 1357 | goto nla_put_failure; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1358 | ret = set->variant->head(set, skb); |
| 1359 | if (ret < 0) |
| 1360 | goto release_refcount; |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1361 | if (dump_flags & IPSET_FLAG_LIST_HEADER) |
| 1362 | goto next_set; |
Jozsef Kadlecsik | c4c9978 | 2015-06-13 11:59:45 +0200 | [diff] [blame] | 1363 | if (set->variant->uref) |
| 1364 | set->variant->uref(set, cb, true); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1365 | /* Fall through and add elements */ |
| 1366 | default: |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1367 | rcu_read_lock_bh(); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1368 | ret = set->variant->list(set, skb, cb); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1369 | rcu_read_unlock_bh(); |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1370 | if (!cb->args[IPSET_CB_ARG0]) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1371 | /* Set is done, proceed with next one */ |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1372 | goto next_set; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1373 | goto release_refcount; |
| 1374 | } |
| 1375 | } |
Jozsef Kadlecsik | a8a8a09 | 2011-04-19 15:59:15 +0200 | [diff] [blame] | 1376 | /* If we dump all sets, continue with dumping last ones */ |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1377 | if (dump_type == DUMP_ALL) { |
| 1378 | dump_type = DUMP_LAST; |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1379 | cb->args[IPSET_CB_DUMP] = dump_type | (dump_flags << 16); |
| 1380 | cb->args[IPSET_CB_INDEX] = 0; |
Jozsef Kadlecsik | c4c9978 | 2015-06-13 11:59:45 +0200 | [diff] [blame] | 1381 | if (set && set->variant->uref) |
| 1382 | set->variant->uref(set, cb, false); |
Jozsef Kadlecsik | a8a8a09 | 2011-04-19 15:59:15 +0200 | [diff] [blame] | 1383 | goto dump_last; |
| 1384 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1385 | goto out; |
| 1386 | |
| 1387 | nla_put_failure: |
| 1388 | ret = -EFAULT; |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1389 | next_set: |
| 1390 | if (dump_type == DUMP_ONE) |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1391 | cb->args[IPSET_CB_INDEX] = IPSET_INVALID_ID; |
Jozsef Kadlecsik | c1e2e04 | 2011-06-16 18:47:07 +0200 | [diff] [blame] | 1392 | else |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1393 | cb->args[IPSET_CB_INDEX]++; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1394 | release_refcount: |
| 1395 | /* If there was an error or set is done, release set */ |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1396 | if (ret || !cb->args[IPSET_CB_ARG0]) { |
Jozsef Kadlecsik | c4c9978 | 2015-06-13 11:59:45 +0200 | [diff] [blame] | 1397 | set = ip_set(inst, index); |
| 1398 | if (set->variant->uref) |
| 1399 | set->variant->uref(set, cb, false); |
| 1400 | pr_debug("release set %s\n", set->name); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1401 | __ip_set_put_byindex(inst, index); |
Jozsef Kadlecsik | 9330288 | 2013-10-18 11:41:55 +0200 | [diff] [blame] | 1402 | cb->args[IPSET_CB_ARG0] = 0; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1403 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1404 | out: |
| 1405 | if (nlh) { |
| 1406 | nlmsg_end(skb, nlh); |
| 1407 | pr_debug("nlmsg_len: %u\n", nlh->nlmsg_len); |
| 1408 | dump_attrs(nlh); |
| 1409 | } |
| 1410 | |
| 1411 | return ret < 0 ? ret : skb->len; |
| 1412 | } |
| 1413 | |
| 1414 | static int |
| 1415 | ip_set_dump(struct sock *ctnl, struct sk_buff *skb, |
| 1416 | const struct nlmsghdr *nlh, |
| 1417 | const struct nlattr * const attr[]) |
| 1418 | { |
| 1419 | if (unlikely(protocol_failed(attr))) |
| 1420 | return -IPSET_ERR_PROTOCOL; |
| 1421 | |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1422 | { |
| 1423 | struct netlink_dump_control c = { |
| 1424 | .dump = ip_set_dump_start, |
| 1425 | .done = ip_set_dump_done, |
| 1426 | }; |
| 1427 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1428 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1429 | } |
| 1430 | |
| 1431 | /* Add, del and test */ |
| 1432 | |
| 1433 | static const struct nla_policy ip_set_adt_policy[IPSET_ATTR_CMD_MAX + 1] = { |
| 1434 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, |
| 1435 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, |
| 1436 | .len = IPSET_MAXNAMELEN - 1 }, |
| 1437 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, |
| 1438 | [IPSET_ATTR_DATA] = { .type = NLA_NESTED }, |
| 1439 | [IPSET_ATTR_ADT] = { .type = NLA_NESTED }, |
| 1440 | }; |
| 1441 | |
| 1442 | static int |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1443 | call_ad(struct sock *ctnl, struct sk_buff *skb, struct ip_set *set, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1444 | struct nlattr *tb[], enum ipset_adt adt, |
| 1445 | u32 flags, bool use_lineno) |
| 1446 | { |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 1447 | int ret; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1448 | u32 lineno = 0; |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 1449 | bool eexist = flags & IPSET_FLAG_EXIST, retried = false; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1450 | |
| 1451 | do { |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1452 | spin_lock_bh(&set->lock); |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 1453 | ret = set->variant->uadt(set, tb, adt, &lineno, flags, retried); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1454 | spin_unlock_bh(&set->lock); |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 1455 | retried = true; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1456 | } while (ret == -EAGAIN && |
| 1457 | set->variant->resize && |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 1458 | (ret = set->variant->resize(set, retried)) == 0); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1459 | |
| 1460 | if (!ret || (ret == -IPSET_ERR_EXIST && eexist)) |
| 1461 | return 0; |
| 1462 | if (lineno && use_lineno) { |
| 1463 | /* Error in restore/batch mode: send back lineno */ |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1464 | struct nlmsghdr *rep, *nlh = nlmsg_hdr(skb); |
| 1465 | struct sk_buff *skb2; |
| 1466 | struct nlmsgerr *errmsg; |
Jozsef Kadlecsik | 73e64e1 | 2014-09-15 20:48:26 +0200 | [diff] [blame] | 1467 | size_t payload = min(SIZE_MAX, |
| 1468 | sizeof(*errmsg) + nlmsg_len(nlh)); |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 1469 | int min_len = nlmsg_total_size(sizeof(struct nfgenmsg)); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1470 | struct nlattr *cda[IPSET_ATTR_CMD_MAX + 1]; |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1471 | struct nlattr *cmdattr; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1472 | u32 *errline; |
| 1473 | |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1474 | skb2 = nlmsg_new(payload, GFP_KERNEL); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1475 | if (!skb2) |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1476 | return -ENOMEM; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1477 | rep = __nlmsg_put(skb2, NETLINK_CB(skb).portid, |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1478 | nlh->nlmsg_seq, NLMSG_ERROR, payload, 0); |
| 1479 | errmsg = nlmsg_data(rep); |
| 1480 | errmsg->error = ret; |
| 1481 | memcpy(&errmsg->msg, nlh, nlh->nlmsg_len); |
| 1482 | cmdattr = (void *)&errmsg->msg + min_len; |
| 1483 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1484 | nla_parse(cda, IPSET_ATTR_CMD_MAX, |
| 1485 | cmdattr, nlh->nlmsg_len - min_len, |
| 1486 | ip_set_adt_policy); |
| 1487 | |
| 1488 | errline = nla_data(cda[IPSET_ATTR_LINENO]); |
| 1489 | |
| 1490 | *errline = lineno; |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1491 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1492 | netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, |
| 1493 | MSG_DONTWAIT); |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1494 | /* Signal netlink not to send its ACK/errmsg. */ |
| 1495 | return -EINTR; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1496 | } |
| 1497 | |
| 1498 | return ret; |
| 1499 | } |
| 1500 | |
| 1501 | static int |
| 1502 | ip_set_uadd(struct sock *ctnl, struct sk_buff *skb, |
| 1503 | const struct nlmsghdr *nlh, |
| 1504 | const struct nlattr * const attr[]) |
| 1505 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1506 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1507 | struct ip_set *set; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1508 | struct nlattr *tb[IPSET_ATTR_ADT_MAX + 1] = {}; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1509 | const struct nlattr *nla; |
| 1510 | u32 flags = flag_exist(nlh); |
| 1511 | bool use_lineno; |
| 1512 | int ret = 0; |
| 1513 | |
| 1514 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1515 | !attr[IPSET_ATTR_SETNAME] || |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1516 | !((attr[IPSET_ATTR_DATA] != NULL) ^ |
| 1517 | (attr[IPSET_ATTR_ADT] != NULL)) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1518 | (attr[IPSET_ATTR_DATA] && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1519 | !flag_nested(attr[IPSET_ATTR_DATA])) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1520 | (attr[IPSET_ATTR_ADT] && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1521 | (!flag_nested(attr[IPSET_ATTR_ADT]) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1522 | !attr[IPSET_ATTR_LINENO])))) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1523 | return -IPSET_ERR_PROTOCOL; |
| 1524 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1525 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1526 | if (!set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1527 | return -ENOENT; |
| 1528 | |
| 1529 | use_lineno = !!attr[IPSET_ATTR_LINENO]; |
| 1530 | if (attr[IPSET_ATTR_DATA]) { |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 1531 | if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, |
| 1532 | attr[IPSET_ATTR_DATA], |
| 1533 | set->type->adt_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1534 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1535 | ret = call_ad(ctnl, skb, set, tb, IPSET_ADD, flags, |
| 1536 | use_lineno); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1537 | } else { |
| 1538 | int nla_rem; |
| 1539 | |
| 1540 | nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) { |
| 1541 | memset(tb, 0, sizeof(tb)); |
| 1542 | if (nla_type(nla) != IPSET_ATTR_DATA || |
| 1543 | !flag_nested(nla) || |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 1544 | nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla, |
| 1545 | set->type->adt_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1546 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1547 | ret = call_ad(ctnl, skb, set, tb, IPSET_ADD, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1548 | flags, use_lineno); |
| 1549 | if (ret < 0) |
| 1550 | return ret; |
| 1551 | } |
| 1552 | } |
| 1553 | return ret; |
| 1554 | } |
| 1555 | |
| 1556 | static int |
| 1557 | ip_set_udel(struct sock *ctnl, struct sk_buff *skb, |
| 1558 | const struct nlmsghdr *nlh, |
| 1559 | const struct nlattr * const attr[]) |
| 1560 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1561 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1562 | struct ip_set *set; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1563 | struct nlattr *tb[IPSET_ATTR_ADT_MAX + 1] = {}; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1564 | const struct nlattr *nla; |
| 1565 | u32 flags = flag_exist(nlh); |
| 1566 | bool use_lineno; |
| 1567 | int ret = 0; |
| 1568 | |
| 1569 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1570 | !attr[IPSET_ATTR_SETNAME] || |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1571 | !((attr[IPSET_ATTR_DATA] != NULL) ^ |
| 1572 | (attr[IPSET_ATTR_ADT] != NULL)) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1573 | (attr[IPSET_ATTR_DATA] && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1574 | !flag_nested(attr[IPSET_ATTR_DATA])) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1575 | (attr[IPSET_ATTR_ADT] && |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1576 | (!flag_nested(attr[IPSET_ATTR_ADT]) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1577 | !attr[IPSET_ATTR_LINENO])))) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1578 | return -IPSET_ERR_PROTOCOL; |
| 1579 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1580 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1581 | if (!set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1582 | return -ENOENT; |
| 1583 | |
| 1584 | use_lineno = !!attr[IPSET_ATTR_LINENO]; |
| 1585 | if (attr[IPSET_ATTR_DATA]) { |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 1586 | if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, |
| 1587 | attr[IPSET_ATTR_DATA], |
| 1588 | set->type->adt_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1589 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1590 | ret = call_ad(ctnl, skb, set, tb, IPSET_DEL, flags, |
| 1591 | use_lineno); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1592 | } else { |
| 1593 | int nla_rem; |
| 1594 | |
| 1595 | nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) { |
| 1596 | memset(tb, 0, sizeof(*tb)); |
| 1597 | if (nla_type(nla) != IPSET_ATTR_DATA || |
| 1598 | !flag_nested(nla) || |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 1599 | nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla, |
| 1600 | set->type->adt_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1601 | return -IPSET_ERR_PROTOCOL; |
Jozsef Kadlecsik | 5f52bc3 | 2011-02-02 23:56:00 +0100 | [diff] [blame] | 1602 | ret = call_ad(ctnl, skb, set, tb, IPSET_DEL, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1603 | flags, use_lineno); |
| 1604 | if (ret < 0) |
| 1605 | return ret; |
| 1606 | } |
| 1607 | } |
| 1608 | return ret; |
| 1609 | } |
| 1610 | |
| 1611 | static int |
| 1612 | ip_set_utest(struct sock *ctnl, struct sk_buff *skb, |
| 1613 | const struct nlmsghdr *nlh, |
| 1614 | const struct nlattr * const attr[]) |
| 1615 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1616 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1617 | struct ip_set *set; |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1618 | struct nlattr *tb[IPSET_ATTR_ADT_MAX + 1] = {}; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1619 | int ret = 0; |
| 1620 | |
| 1621 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1622 | !attr[IPSET_ATTR_SETNAME] || |
| 1623 | !attr[IPSET_ATTR_DATA] || |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1624 | !flag_nested(attr[IPSET_ATTR_DATA]))) |
| 1625 | return -IPSET_ERR_PROTOCOL; |
| 1626 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1627 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1628 | if (!set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1629 | return -ENOENT; |
| 1630 | |
Patrick McHardy | 8da560c | 2011-02-01 16:27:25 +0100 | [diff] [blame] | 1631 | if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA], |
| 1632 | set->type->adt_policy)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1633 | return -IPSET_ERR_PROTOCOL; |
| 1634 | |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1635 | rcu_read_lock_bh(); |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 1636 | ret = set->variant->uadt(set, tb, IPSET_TEST, NULL, 0, 0); |
Jozsef Kadlecsik | b57b2d1 | 2015-06-13 14:22:25 +0200 | [diff] [blame] | 1637 | rcu_read_unlock_bh(); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1638 | /* Userspace can't trigger element to be re-added */ |
| 1639 | if (ret == -EAGAIN) |
| 1640 | ret = 1; |
| 1641 | |
Jozsef Kadlecsik | 0f1799b | 2013-09-16 20:04:53 +0200 | [diff] [blame] | 1642 | return ret > 0 ? 0 : -IPSET_ERR_EXIST; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1643 | } |
| 1644 | |
| 1645 | /* Get headed data of a set */ |
| 1646 | |
| 1647 | static int |
| 1648 | ip_set_header(struct sock *ctnl, struct sk_buff *skb, |
| 1649 | const struct nlmsghdr *nlh, |
| 1650 | const struct nlattr * const attr[]) |
| 1651 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1652 | struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1653 | const struct ip_set *set; |
| 1654 | struct sk_buff *skb2; |
| 1655 | struct nlmsghdr *nlh2; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1656 | int ret = 0; |
| 1657 | |
| 1658 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1659 | !attr[IPSET_ATTR_SETNAME])) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1660 | return -IPSET_ERR_PROTOCOL; |
| 1661 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1662 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1663 | if (!set) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1664 | return -ENOENT; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1665 | |
| 1666 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1667 | if (!skb2) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1668 | return -ENOMEM; |
| 1669 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1670 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1671 | IPSET_CMD_HEADER); |
| 1672 | if (!nlh2) |
| 1673 | goto nlmsg_failure; |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 1674 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL) || |
| 1675 | nla_put_string(skb2, IPSET_ATTR_SETNAME, set->name) || |
| 1676 | nla_put_string(skb2, IPSET_ATTR_TYPENAME, set->type->name) || |
| 1677 | nla_put_u8(skb2, IPSET_ATTR_FAMILY, set->family) || |
| 1678 | nla_put_u8(skb2, IPSET_ATTR_REVISION, set->revision)) |
| 1679 | goto nla_put_failure; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1680 | nlmsg_end(skb2, nlh2); |
| 1681 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1682 | ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1683 | if (ret < 0) |
| 1684 | return ret; |
| 1685 | |
| 1686 | return 0; |
| 1687 | |
| 1688 | nla_put_failure: |
| 1689 | nlmsg_cancel(skb2, nlh2); |
| 1690 | nlmsg_failure: |
| 1691 | kfree_skb(skb2); |
| 1692 | return -EMSGSIZE; |
| 1693 | } |
| 1694 | |
| 1695 | /* Get type data */ |
| 1696 | |
| 1697 | static const struct nla_policy ip_set_type_policy[IPSET_ATTR_CMD_MAX + 1] = { |
| 1698 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, |
| 1699 | [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING, |
| 1700 | .len = IPSET_MAXNAMELEN - 1 }, |
| 1701 | [IPSET_ATTR_FAMILY] = { .type = NLA_U8 }, |
| 1702 | }; |
| 1703 | |
| 1704 | static int |
| 1705 | ip_set_type(struct sock *ctnl, struct sk_buff *skb, |
| 1706 | const struct nlmsghdr *nlh, |
| 1707 | const struct nlattr * const attr[]) |
| 1708 | { |
| 1709 | struct sk_buff *skb2; |
| 1710 | struct nlmsghdr *nlh2; |
| 1711 | u8 family, min, max; |
| 1712 | const char *typename; |
| 1713 | int ret = 0; |
| 1714 | |
| 1715 | if (unlikely(protocol_failed(attr) || |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1716 | !attr[IPSET_ATTR_TYPENAME] || |
| 1717 | !attr[IPSET_ATTR_FAMILY])) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1718 | return -IPSET_ERR_PROTOCOL; |
| 1719 | |
| 1720 | family = nla_get_u8(attr[IPSET_ATTR_FAMILY]); |
| 1721 | typename = nla_data(attr[IPSET_ATTR_TYPENAME]); |
| 1722 | ret = find_set_type_minmax(typename, family, &min, &max); |
| 1723 | if (ret) |
| 1724 | return ret; |
| 1725 | |
| 1726 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1727 | if (!skb2) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1728 | return -ENOMEM; |
| 1729 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1730 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1731 | IPSET_CMD_TYPE); |
| 1732 | if (!nlh2) |
| 1733 | goto nlmsg_failure; |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 1734 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL) || |
| 1735 | nla_put_string(skb2, IPSET_ATTR_TYPENAME, typename) || |
| 1736 | nla_put_u8(skb2, IPSET_ATTR_FAMILY, family) || |
| 1737 | nla_put_u8(skb2, IPSET_ATTR_REVISION, max) || |
| 1738 | nla_put_u8(skb2, IPSET_ATTR_REVISION_MIN, min)) |
| 1739 | goto nla_put_failure; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1740 | nlmsg_end(skb2, nlh2); |
| 1741 | |
| 1742 | pr_debug("Send TYPE, nlmsg_len: %u\n", nlh2->nlmsg_len); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1743 | ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1744 | if (ret < 0) |
| 1745 | return ret; |
| 1746 | |
| 1747 | return 0; |
| 1748 | |
| 1749 | nla_put_failure: |
| 1750 | nlmsg_cancel(skb2, nlh2); |
| 1751 | nlmsg_failure: |
| 1752 | kfree_skb(skb2); |
| 1753 | return -EMSGSIZE; |
| 1754 | } |
| 1755 | |
| 1756 | /* Get protocol version */ |
| 1757 | |
| 1758 | static const struct nla_policy |
| 1759 | ip_set_protocol_policy[IPSET_ATTR_CMD_MAX + 1] = { |
| 1760 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, |
| 1761 | }; |
| 1762 | |
| 1763 | static int |
| 1764 | ip_set_protocol(struct sock *ctnl, struct sk_buff *skb, |
| 1765 | const struct nlmsghdr *nlh, |
| 1766 | const struct nlattr * const attr[]) |
| 1767 | { |
| 1768 | struct sk_buff *skb2; |
| 1769 | struct nlmsghdr *nlh2; |
| 1770 | int ret = 0; |
| 1771 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1772 | if (unlikely(!attr[IPSET_ATTR_PROTOCOL])) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1773 | return -IPSET_ERR_PROTOCOL; |
| 1774 | |
| 1775 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1776 | if (!skb2) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1777 | return -ENOMEM; |
| 1778 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1779 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1780 | IPSET_CMD_PROTOCOL); |
| 1781 | if (!nlh2) |
| 1782 | goto nlmsg_failure; |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 1783 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL)) |
| 1784 | goto nla_put_failure; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1785 | nlmsg_end(skb2, nlh2); |
| 1786 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1787 | ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1788 | if (ret < 0) |
| 1789 | return ret; |
| 1790 | |
| 1791 | return 0; |
| 1792 | |
| 1793 | nla_put_failure: |
| 1794 | nlmsg_cancel(skb2, nlh2); |
| 1795 | nlmsg_failure: |
| 1796 | kfree_skb(skb2); |
| 1797 | return -EMSGSIZE; |
| 1798 | } |
| 1799 | |
| 1800 | static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = { |
Tomasz Bursztyka | d31f4d4 | 2012-06-28 02:57:48 +0000 | [diff] [blame] | 1801 | [IPSET_CMD_NONE] = { |
| 1802 | .call = ip_set_none, |
| 1803 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1804 | }, |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1805 | [IPSET_CMD_CREATE] = { |
| 1806 | .call = ip_set_create, |
| 1807 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1808 | .policy = ip_set_create_policy, |
| 1809 | }, |
| 1810 | [IPSET_CMD_DESTROY] = { |
| 1811 | .call = ip_set_destroy, |
| 1812 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1813 | .policy = ip_set_setname_policy, |
| 1814 | }, |
| 1815 | [IPSET_CMD_FLUSH] = { |
| 1816 | .call = ip_set_flush, |
| 1817 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1818 | .policy = ip_set_setname_policy, |
| 1819 | }, |
| 1820 | [IPSET_CMD_RENAME] = { |
| 1821 | .call = ip_set_rename, |
| 1822 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1823 | .policy = ip_set_setname2_policy, |
| 1824 | }, |
| 1825 | [IPSET_CMD_SWAP] = { |
| 1826 | .call = ip_set_swap, |
| 1827 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1828 | .policy = ip_set_setname2_policy, |
| 1829 | }, |
| 1830 | [IPSET_CMD_LIST] = { |
| 1831 | .call = ip_set_dump, |
| 1832 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1833 | .policy = ip_set_setname_policy, |
| 1834 | }, |
| 1835 | [IPSET_CMD_SAVE] = { |
| 1836 | .call = ip_set_dump, |
| 1837 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1838 | .policy = ip_set_setname_policy, |
| 1839 | }, |
| 1840 | [IPSET_CMD_ADD] = { |
| 1841 | .call = ip_set_uadd, |
| 1842 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1843 | .policy = ip_set_adt_policy, |
| 1844 | }, |
| 1845 | [IPSET_CMD_DEL] = { |
| 1846 | .call = ip_set_udel, |
| 1847 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1848 | .policy = ip_set_adt_policy, |
| 1849 | }, |
| 1850 | [IPSET_CMD_TEST] = { |
| 1851 | .call = ip_set_utest, |
| 1852 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1853 | .policy = ip_set_adt_policy, |
| 1854 | }, |
| 1855 | [IPSET_CMD_HEADER] = { |
| 1856 | .call = ip_set_header, |
| 1857 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1858 | .policy = ip_set_setname_policy, |
| 1859 | }, |
| 1860 | [IPSET_CMD_TYPE] = { |
| 1861 | .call = ip_set_type, |
| 1862 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1863 | .policy = ip_set_type_policy, |
| 1864 | }, |
| 1865 | [IPSET_CMD_PROTOCOL] = { |
| 1866 | .call = ip_set_protocol, |
| 1867 | .attr_count = IPSET_ATTR_CMD_MAX, |
| 1868 | .policy = ip_set_protocol_policy, |
| 1869 | }, |
| 1870 | }; |
| 1871 | |
| 1872 | static struct nfnetlink_subsystem ip_set_netlink_subsys __read_mostly = { |
| 1873 | .name = "ip_set", |
| 1874 | .subsys_id = NFNL_SUBSYS_IPSET, |
| 1875 | .cb_count = IPSET_MSG_MAX, |
| 1876 | .cb = ip_set_netlink_subsys_cb, |
| 1877 | }; |
| 1878 | |
| 1879 | /* Interface to iptables/ip6tables */ |
| 1880 | |
| 1881 | static int |
| 1882 | ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) |
| 1883 | { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1884 | unsigned int *op; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1885 | void *data; |
| 1886 | int copylen = *len, ret = 0; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1887 | struct net *net = sock_net(sk); |
| 1888 | struct ip_set_net *inst = ip_set_pernet(net); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1889 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1890 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1891 | return -EPERM; |
| 1892 | if (optval != SO_IP_SET) |
| 1893 | return -EBADF; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1894 | if (*len < sizeof(unsigned int)) |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1895 | return -EINVAL; |
| 1896 | |
| 1897 | data = vmalloc(*len); |
| 1898 | if (!data) |
| 1899 | return -ENOMEM; |
| 1900 | if (copy_from_user(data, user, *len) != 0) { |
| 1901 | ret = -EFAULT; |
| 1902 | goto done; |
| 1903 | } |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 1904 | op = (unsigned int *)data; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1905 | |
| 1906 | if (*op < IP_SET_OP_VERSION) { |
| 1907 | /* Check the version at the beginning of operations */ |
| 1908 | struct ip_set_req_version *req_version = data; |
Dan Carpenter | 2196937 | 2014-11-10 17:11:21 +0100 | [diff] [blame] | 1909 | |
| 1910 | if (*len < sizeof(struct ip_set_req_version)) { |
| 1911 | ret = -EINVAL; |
| 1912 | goto done; |
| 1913 | } |
| 1914 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1915 | if (req_version->version != IPSET_PROTOCOL) { |
| 1916 | ret = -EPROTO; |
| 1917 | goto done; |
| 1918 | } |
| 1919 | } |
| 1920 | |
| 1921 | switch (*op) { |
| 1922 | case IP_SET_OP_VERSION: { |
| 1923 | struct ip_set_req_version *req_version = data; |
| 1924 | |
| 1925 | if (*len != sizeof(struct ip_set_req_version)) { |
| 1926 | ret = -EINVAL; |
| 1927 | goto done; |
| 1928 | } |
| 1929 | |
| 1930 | req_version->version = IPSET_PROTOCOL; |
| 1931 | ret = copy_to_user(user, req_version, |
| 1932 | sizeof(struct ip_set_req_version)); |
| 1933 | goto done; |
| 1934 | } |
| 1935 | case IP_SET_OP_GET_BYNAME: { |
| 1936 | struct ip_set_req_get_set *req_get = data; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1937 | ip_set_id_t id; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1938 | |
| 1939 | if (*len != sizeof(struct ip_set_req_get_set)) { |
| 1940 | ret = -EINVAL; |
| 1941 | goto done; |
| 1942 | } |
| 1943 | req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0'; |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1944 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1945 | find_set_and_id(inst, req_get->set.name, &id); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1946 | req_get->set.index = id; |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1947 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1948 | goto copy; |
| 1949 | } |
Jozsef Kadlecsik | 5e04c0c | 2013-09-30 07:57:18 +0200 | [diff] [blame] | 1950 | case IP_SET_OP_GET_FNAME: { |
| 1951 | struct ip_set_req_get_set_family *req_get = data; |
| 1952 | ip_set_id_t id; |
| 1953 | |
| 1954 | if (*len != sizeof(struct ip_set_req_get_set_family)) { |
| 1955 | ret = -EINVAL; |
| 1956 | goto done; |
| 1957 | } |
| 1958 | req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0'; |
| 1959 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1960 | find_set_and_id(inst, req_get->set.name, &id); |
Jozsef Kadlecsik | 5e04c0c | 2013-09-30 07:57:18 +0200 | [diff] [blame] | 1961 | req_get->set.index = id; |
| 1962 | if (id != IPSET_INVALID_ID) |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1963 | req_get->family = ip_set(inst, id)->family; |
Jozsef Kadlecsik | 5e04c0c | 2013-09-30 07:57:18 +0200 | [diff] [blame] | 1964 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
| 1965 | goto copy; |
| 1966 | } |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1967 | case IP_SET_OP_GET_BYINDEX: { |
| 1968 | struct ip_set_req_get_set *req_get = data; |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1969 | struct ip_set *set; |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1970 | |
| 1971 | if (*len != sizeof(struct ip_set_req_get_set) || |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 1972 | req_get->set.index >= inst->ip_set_max) { |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1973 | ret = -EINVAL; |
| 1974 | goto done; |
| 1975 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1976 | nfnl_lock(NFNL_SUBSYS_IPSET); |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 1977 | set = ip_set(inst, req_get->set.index); |
Jozsef Kadlecsik | 9076aea | 2012-11-27 09:58:09 +0000 | [diff] [blame] | 1978 | strncpy(req_get->set.name, set ? set->name : "", |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1979 | IPSET_MAXNAMELEN); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1980 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 1981 | goto copy; |
| 1982 | } |
| 1983 | default: |
| 1984 | ret = -EBADMSG; |
| 1985 | goto done; |
| 1986 | } /* end of switch(op) */ |
| 1987 | |
| 1988 | copy: |
| 1989 | ret = copy_to_user(user, data, copylen); |
| 1990 | |
| 1991 | done: |
| 1992 | vfree(data); |
| 1993 | if (ret > 0) |
| 1994 | ret = 0; |
| 1995 | return ret; |
| 1996 | } |
| 1997 | |
| 1998 | static struct nf_sockopt_ops so_set __read_mostly = { |
| 1999 | .pf = PF_INET, |
| 2000 | .get_optmin = SO_IP_SET, |
| 2001 | .get_optmax = SO_IP_SET + 1, |
| 2002 | .get = &ip_set_sockfn_get, |
| 2003 | .owner = THIS_MODULE, |
| 2004 | }; |
| 2005 | |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2006 | static int __net_init |
| 2007 | ip_set_net_init(struct net *net) |
| 2008 | { |
| 2009 | struct ip_set_net *inst = ip_set_pernet(net); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2010 | struct ip_set **list; |
| 2011 | |
| 2012 | inst->ip_set_max = max_sets ? max_sets : CONFIG_IP_SET_MAX; |
| 2013 | if (inst->ip_set_max >= IPSET_INVALID_ID) |
| 2014 | inst->ip_set_max = IPSET_INVALID_ID - 1; |
| 2015 | |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 2016 | list = kcalloc(inst->ip_set_max, sizeof(struct ip_set *), GFP_KERNEL); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2017 | if (!list) |
| 2018 | return -ENOMEM; |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 2019 | inst->is_deleted = false; |
| 2020 | inst->is_destroyed = false; |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2021 | rcu_assign_pointer(inst->ip_set_list, list); |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2022 | return 0; |
| 2023 | } |
| 2024 | |
| 2025 | static void __net_exit |
| 2026 | ip_set_net_exit(struct net *net) |
| 2027 | { |
| 2028 | struct ip_set_net *inst = ip_set_pernet(net); |
| 2029 | |
| 2030 | struct ip_set *set = NULL; |
| 2031 | ip_set_id_t i; |
| 2032 | |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 2033 | inst->is_deleted = true; /* flag for ip_set_nfnl_put */ |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2034 | |
| 2035 | for (i = 0; i < inst->ip_set_max; i++) { |
Patrick McHardy | 3e90ebd | 2014-02-18 18:06:47 +0000 | [diff] [blame] | 2036 | set = ip_set(inst, i); |
Jozsef Kadlecsik | 9c1ba5c | 2015-06-13 13:39:38 +0200 | [diff] [blame] | 2037 | if (set) { |
| 2038 | ip_set(inst, i) = NULL; |
| 2039 | ip_set_destroy_set(set); |
| 2040 | } |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2041 | } |
| 2042 | kfree(rcu_dereference_protected(inst->ip_set_list, 1)); |
| 2043 | } |
| 2044 | |
| 2045 | static struct pernet_operations ip_set_net_ops = { |
| 2046 | .init = ip_set_net_init, |
| 2047 | .exit = ip_set_net_exit, |
| 2048 | .id = &ip_set_net_id, |
| 2049 | .size = sizeof(struct ip_set_net) |
| 2050 | }; |
| 2051 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2052 | static int __init |
| 2053 | ip_set_init(void) |
| 2054 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2055 | int ret = nfnetlink_subsys_register(&ip_set_netlink_subsys); |
Jozsef Kadlecsik | ca0f6a5 | 2015-06-13 19:45:33 +0200 | [diff] [blame] | 2056 | |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2057 | if (ret != 0) { |
| 2058 | pr_err("ip_set: cannot register with nfnetlink.\n"); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2059 | return ret; |
| 2060 | } |
| 2061 | ret = nf_register_sockopt(&so_set); |
| 2062 | if (ret != 0) { |
| 2063 | pr_err("SO_SET registry failed: %d\n", ret); |
| 2064 | nfnetlink_subsys_unregister(&ip_set_netlink_subsys); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2065 | return ret; |
| 2066 | } |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2067 | ret = register_pernet_subsys(&ip_set_net_ops); |
| 2068 | if (ret) { |
| 2069 | pr_err("ip_set: cannot register pernet_subsys.\n"); |
| 2070 | nf_unregister_sockopt(&so_set); |
| 2071 | nfnetlink_subsys_unregister(&ip_set_netlink_subsys); |
| 2072 | return ret; |
| 2073 | } |
Ilia Mirkin | 6843bc3 | 2014-03-05 07:55:10 +0100 | [diff] [blame] | 2074 | pr_info("ip_set: protocol %u\n", IPSET_PROTOCOL); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2075 | return 0; |
| 2076 | } |
| 2077 | |
| 2078 | static void __exit |
| 2079 | ip_set_fini(void) |
| 2080 | { |
Vitaly Lavrov | 1785e8f | 2013-09-30 17:07:02 +0200 | [diff] [blame] | 2081 | unregister_pernet_subsys(&ip_set_net_ops); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2082 | nf_unregister_sockopt(&so_set); |
| 2083 | nfnetlink_subsys_unregister(&ip_set_netlink_subsys); |
Jozsef Kadlecsik | a7b4f98 | 2011-02-01 15:28:35 +0100 | [diff] [blame] | 2084 | pr_debug("these are the famous last words\n"); |
| 2085 | } |
| 2086 | |
| 2087 | module_init(ip_set_init); |
| 2088 | module_exit(ip_set_fini); |