Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/init.h> |
| 3 | #include <linux/module.h> |
| 4 | #include <linux/proc_fs.h> |
| 5 | #include <linux/skbuff.h> |
| 6 | #include <linux/netfilter.h> |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 7 | #include <linux/seq_file.h> |
Patrick McHardy | 7a11b98 | 2006-02-27 13:03:24 -0800 | [diff] [blame] | 8 | #include <linux/rcupdate.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 9 | #include <net/protocol.h> |
Patrick McHardy | c01cd42 | 2007-12-05 01:24:48 -0800 | [diff] [blame] | 10 | #include <net/netfilter/nf_queue.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 11 | |
| 12 | #include "nf_internals.h" |
| 13 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 14 | /* |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 15 | * A queue handler may be registered for each protocol. Each is protected by |
| 16 | * long term mutex. The handler must provide an an outfn() to accept packets |
| 17 | * for queueing and must reinject all packets it receives, no matter what. |
| 18 | */ |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 19 | static const struct nf_queue_handler *queue_handler[NPROTO]; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 20 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 21 | static DEFINE_MUTEX(queue_handler_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 22 | |
Harald Welte | d72367b | 2005-08-09 20:23:36 -0700 | [diff] [blame] | 23 | /* return EBUSY when somebody else is registered, return EEXIST if the |
| 24 | * same handler is registered, return 0 in case of success. */ |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 25 | int nf_register_queue_handler(int pf, const struct nf_queue_handler *qh) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 26 | { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 27 | int ret; |
| 28 | |
| 29 | if (pf >= NPROTO) |
| 30 | return -EINVAL; |
| 31 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 32 | mutex_lock(&queue_handler_mutex); |
Harald Welte | d72367b | 2005-08-09 20:23:36 -0700 | [diff] [blame] | 33 | if (queue_handler[pf] == qh) |
| 34 | ret = -EEXIST; |
| 35 | else if (queue_handler[pf]) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 36 | ret = -EBUSY; |
| 37 | else { |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 38 | rcu_assign_pointer(queue_handler[pf], qh); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 39 | ret = 0; |
| 40 | } |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 41 | mutex_unlock(&queue_handler_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 42 | |
| 43 | return ret; |
| 44 | } |
| 45 | EXPORT_SYMBOL(nf_register_queue_handler); |
| 46 | |
| 47 | /* The caller must flush their queue before this */ |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 48 | int nf_unregister_queue_handler(int pf, const struct nf_queue_handler *qh) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 49 | { |
| 50 | if (pf >= NPROTO) |
| 51 | return -EINVAL; |
| 52 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 53 | mutex_lock(&queue_handler_mutex); |
Yasuyuki Kozakai | ce7663d | 2007-07-07 22:40:08 -0700 | [diff] [blame] | 54 | if (queue_handler[pf] != qh) { |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 55 | mutex_unlock(&queue_handler_mutex); |
Yasuyuki Kozakai | ce7663d | 2007-07-07 22:40:08 -0700 | [diff] [blame] | 56 | return -EINVAL; |
| 57 | } |
| 58 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 59 | rcu_assign_pointer(queue_handler[pf], NULL); |
| 60 | mutex_unlock(&queue_handler_mutex); |
| 61 | |
| 62 | synchronize_rcu(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 63 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 64 | return 0; |
| 65 | } |
| 66 | EXPORT_SYMBOL(nf_unregister_queue_handler); |
| 67 | |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 68 | void nf_unregister_queue_handlers(const struct nf_queue_handler *qh) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 69 | { |
| 70 | int pf; |
| 71 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 72 | mutex_lock(&queue_handler_mutex); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 73 | for (pf = 0; pf < NPROTO; pf++) { |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 74 | if (queue_handler[pf] == qh) |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 75 | rcu_assign_pointer(queue_handler[pf], NULL); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 76 | } |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 77 | mutex_unlock(&queue_handler_mutex); |
| 78 | |
| 79 | synchronize_rcu(); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 80 | } |
| 81 | EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers); |
| 82 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 83 | /* |
| 84 | * Any packet that leaves via this function must come back |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 85 | * through nf_reinject(). |
| 86 | */ |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 87 | static int __nf_queue(struct sk_buff *skb, |
| 88 | struct list_head *elem, |
| 89 | int pf, unsigned int hook, |
| 90 | struct net_device *indev, |
| 91 | struct net_device *outdev, |
| 92 | int (*okfn)(struct sk_buff *), |
| 93 | unsigned int queuenum) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 94 | { |
| 95 | int status; |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 96 | struct nf_queue_entry *entry; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 97 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 98 | struct net_device *physindev = NULL; |
| 99 | struct net_device *physoutdev = NULL; |
| 100 | #endif |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 101 | struct nf_afinfo *afinfo; |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 102 | const struct nf_queue_handler *qh; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 103 | |
| 104 | /* QUEUE == DROP if noone is waiting, to be safe. */ |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 105 | rcu_read_lock(); |
| 106 | |
| 107 | qh = rcu_dereference(queue_handler[pf]); |
| 108 | if (!qh) { |
| 109 | rcu_read_unlock(); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 110 | kfree_skb(skb); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 111 | return 1; |
| 112 | } |
| 113 | |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 114 | afinfo = nf_get_afinfo(pf); |
| 115 | if (!afinfo) { |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 116 | rcu_read_unlock(); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 117 | kfree_skb(skb); |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 118 | return 1; |
| 119 | } |
| 120 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 121 | entry = kmalloc(sizeof(*entry) + afinfo->route_key_size, GFP_ATOMIC); |
| 122 | if (!entry) { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 123 | if (net_ratelimit()) |
| 124 | printk(KERN_ERR "OOM queueing packet %p\n", |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 125 | skb); |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 126 | rcu_read_unlock(); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 127 | kfree_skb(skb); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 128 | return 1; |
| 129 | } |
| 130 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 131 | *entry = (struct nf_queue_entry) { |
| 132 | .skb = skb, |
| 133 | .elem = list_entry(elem, struct nf_hook_ops, list), |
| 134 | .pf = pf, |
| 135 | .hook = hook, |
| 136 | .indev = indev, |
| 137 | .outdev = outdev, |
| 138 | .okfn = okfn, |
| 139 | }; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 140 | |
| 141 | /* If it's going away, ignore hook. */ |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 142 | if (!try_module_get(entry->elem->owner)) { |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 143 | rcu_read_unlock(); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 144 | kfree(entry); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | /* Bump dev refs so they don't vanish while packet is out */ |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 149 | if (indev) |
| 150 | dev_hold(indev); |
| 151 | if (outdev) |
| 152 | dev_hold(outdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 153 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 154 | if (skb->nf_bridge) { |
| 155 | physindev = skb->nf_bridge->physindev; |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 156 | if (physindev) |
| 157 | dev_hold(physindev); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 158 | physoutdev = skb->nf_bridge->physoutdev; |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 159 | if (physoutdev) |
| 160 | dev_hold(physoutdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 161 | } |
| 162 | #endif |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 163 | afinfo->saveroute(skb, entry); |
| 164 | status = qh->outfn(entry, queuenum); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 165 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 166 | rcu_read_unlock(); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 167 | |
| 168 | if (status < 0) { |
| 169 | /* James M doesn't say fuck enough. */ |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 170 | if (indev) |
| 171 | dev_put(indev); |
| 172 | if (outdev) |
| 173 | dev_put(outdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 174 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 175 | if (physindev) |
| 176 | dev_put(physindev); |
| 177 | if (physoutdev) |
| 178 | dev_put(physoutdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 179 | #endif |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 180 | module_put(entry->elem->owner); |
| 181 | kfree(entry); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 182 | kfree_skb(skb); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 183 | |
| 184 | return 1; |
| 185 | } |
| 186 | |
| 187 | return 1; |
| 188 | } |
| 189 | |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 190 | int nf_queue(struct sk_buff *skb, |
| 191 | struct list_head *elem, |
| 192 | int pf, unsigned int hook, |
| 193 | struct net_device *indev, |
| 194 | struct net_device *outdev, |
| 195 | int (*okfn)(struct sk_buff *), |
| 196 | unsigned int queuenum) |
| 197 | { |
| 198 | struct sk_buff *segs; |
| 199 | |
| 200 | if (!skb_is_gso(skb)) |
| 201 | return __nf_queue(skb, elem, pf, hook, indev, outdev, okfn, |
| 202 | queuenum); |
| 203 | |
| 204 | switch (pf) { |
| 205 | case AF_INET: |
| 206 | skb->protocol = htons(ETH_P_IP); |
| 207 | break; |
| 208 | case AF_INET6: |
| 209 | skb->protocol = htons(ETH_P_IPV6); |
| 210 | break; |
| 211 | } |
| 212 | |
| 213 | segs = skb_gso_segment(skb, 0); |
| 214 | kfree_skb(skb); |
| 215 | if (unlikely(IS_ERR(segs))) |
| 216 | return 1; |
| 217 | |
| 218 | do { |
| 219 | struct sk_buff *nskb = segs->next; |
| 220 | |
| 221 | segs->next = NULL; |
| 222 | if (!__nf_queue(segs, elem, pf, hook, indev, outdev, okfn, |
| 223 | queuenum)) |
| 224 | kfree_skb(segs); |
| 225 | segs = nskb; |
| 226 | } while (segs); |
| 227 | return 1; |
| 228 | } |
| 229 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 230 | void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 231 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 232 | struct sk_buff *skb = entry->skb; |
| 233 | struct list_head *elem = &entry->elem->list; |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 234 | struct nf_afinfo *afinfo; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 235 | |
| 236 | rcu_read_lock(); |
| 237 | |
| 238 | /* Release those devices we held, or Alexey will kill me. */ |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 239 | if (entry->indev) |
| 240 | dev_put(entry->indev); |
| 241 | if (entry->outdev) |
| 242 | dev_put(entry->outdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 243 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 244 | if (skb->nf_bridge) { |
| 245 | if (skb->nf_bridge->physindev) |
| 246 | dev_put(skb->nf_bridge->physindev); |
| 247 | if (skb->nf_bridge->physoutdev) |
| 248 | dev_put(skb->nf_bridge->physoutdev); |
| 249 | } |
| 250 | #endif |
| 251 | |
| 252 | /* Drop reference to owner of hook which queued us. */ |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 253 | module_put(entry->elem->owner); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 254 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 255 | /* Continue traversal iff userspace said ok... */ |
| 256 | if (verdict == NF_REPEAT) { |
| 257 | elem = elem->prev; |
| 258 | verdict = NF_ACCEPT; |
| 259 | } |
| 260 | |
| 261 | if (verdict == NF_ACCEPT) { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 262 | afinfo = nf_get_afinfo(entry->pf); |
| 263 | if (!afinfo || afinfo->reroute(skb, entry) < 0) |
Patrick McHardy | 7a11b98 | 2006-02-27 13:03:24 -0800 | [diff] [blame] | 264 | verdict = NF_DROP; |
| 265 | } |
| 266 | |
| 267 | if (verdict == NF_ACCEPT) { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 268 | next_hook: |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 269 | verdict = nf_iterate(&nf_hooks[entry->pf][entry->hook], |
| 270 | skb, entry->hook, |
| 271 | entry->indev, entry->outdev, &elem, |
| 272 | entry->okfn, INT_MIN); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | switch (verdict & NF_VERDICT_MASK) { |
| 276 | case NF_ACCEPT: |
Patrick McHardy | 3bc3871 | 2006-07-24 22:52:47 -0700 | [diff] [blame] | 277 | case NF_STOP: |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame^] | 278 | local_bh_disable(); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 279 | entry->okfn(skb); |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame^] | 280 | local_bh_enable(); |
Patrick McHardy | 3bc3871 | 2006-07-24 22:52:47 -0700 | [diff] [blame] | 281 | case NF_STOLEN: |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 282 | break; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 283 | case NF_QUEUE: |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 284 | if (!__nf_queue(skb, elem, entry->pf, entry->hook, |
| 285 | entry->indev, entry->outdev, entry->okfn, |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 286 | verdict >> NF_VERDICT_BITS)) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 287 | goto next_hook; |
| 288 | break; |
Patrick McHardy | 3bc3871 | 2006-07-24 22:52:47 -0700 | [diff] [blame] | 289 | default: |
| 290 | kfree_skb(skb); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 291 | } |
| 292 | rcu_read_unlock(); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 293 | kfree(entry); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 294 | return; |
| 295 | } |
| 296 | EXPORT_SYMBOL(nf_reinject); |
| 297 | |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 298 | #ifdef CONFIG_PROC_FS |
| 299 | static void *seq_start(struct seq_file *seq, loff_t *pos) |
| 300 | { |
| 301 | if (*pos >= NPROTO) |
| 302 | return NULL; |
| 303 | |
| 304 | return pos; |
| 305 | } |
| 306 | |
| 307 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 308 | { |
| 309 | (*pos)++; |
| 310 | |
| 311 | if (*pos >= NPROTO) |
| 312 | return NULL; |
| 313 | |
| 314 | return pos; |
| 315 | } |
| 316 | |
| 317 | static void seq_stop(struct seq_file *s, void *v) |
| 318 | { |
| 319 | |
| 320 | } |
| 321 | |
| 322 | static int seq_show(struct seq_file *s, void *v) |
| 323 | { |
| 324 | int ret; |
| 325 | loff_t *pos = v; |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 326 | const struct nf_queue_handler *qh; |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 327 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 328 | rcu_read_lock(); |
| 329 | qh = rcu_dereference(queue_handler[*pos]); |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 330 | if (!qh) |
| 331 | ret = seq_printf(s, "%2lld NONE\n", *pos); |
| 332 | else |
| 333 | ret = seq_printf(s, "%2lld %s\n", *pos, qh->name); |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 334 | rcu_read_unlock(); |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 335 | |
| 336 | return ret; |
| 337 | } |
| 338 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 339 | static const struct seq_operations nfqueue_seq_ops = { |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 340 | .start = seq_start, |
| 341 | .next = seq_next, |
| 342 | .stop = seq_stop, |
| 343 | .show = seq_show, |
| 344 | }; |
| 345 | |
| 346 | static int nfqueue_open(struct inode *inode, struct file *file) |
| 347 | { |
| 348 | return seq_open(file, &nfqueue_seq_ops); |
| 349 | } |
| 350 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 351 | static const struct file_operations nfqueue_file_ops = { |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 352 | .owner = THIS_MODULE, |
| 353 | .open = nfqueue_open, |
| 354 | .read = seq_read, |
| 355 | .llseek = seq_lseek, |
| 356 | .release = seq_release, |
| 357 | }; |
| 358 | #endif /* PROC_FS */ |
| 359 | |
| 360 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 361 | int __init netfilter_queue_init(void) |
| 362 | { |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 363 | #ifdef CONFIG_PROC_FS |
| 364 | struct proc_dir_entry *pde; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 365 | |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 366 | pde = create_proc_entry("nf_queue", S_IRUGO, proc_net_netfilter); |
Patrick McHardy | e02f7d1 | 2006-02-27 13:02:52 -0800 | [diff] [blame] | 367 | if (!pde) |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 368 | return -1; |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 369 | pde->proc_fops = &nfqueue_file_ops; |
| 370 | #endif |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 371 | return 0; |
| 372 | } |
| 373 | |