Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 1 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 2 | #include <linux/slab.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 3 | #include <linux/init.h> |
| 4 | #include <linux/module.h> |
| 5 | #include <linux/proc_fs.h> |
| 6 | #include <linux/skbuff.h> |
| 7 | #include <linux/netfilter.h> |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 8 | #include <linux/seq_file.h> |
Patrick McHardy | 7a11b98 | 2006-02-27 13:03:24 -0800 | [diff] [blame] | 9 | #include <linux/rcupdate.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 10 | #include <net/protocol.h> |
Patrick McHardy | c01cd42 | 2007-12-05 01:24:48 -0800 | [diff] [blame] | 11 | #include <net/netfilter/nf_queue.h> |
Eric Dumazet | 7fee226 | 2010-05-11 23:19:48 +0000 | [diff] [blame] | 12 | #include <net/dst.h> |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 13 | |
| 14 | #include "nf_internals.h" |
| 15 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 16 | /* |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 17 | * Hook for nfnetlink_queue to register its queue handler. |
| 18 | * We do this so that most of the NFQUEUE code can be modular. |
| 19 | * |
| 20 | * Once the queue is registered it must reinject all packets it |
| 21 | * receives, no matter what. |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 22 | */ |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 23 | static const struct nf_queue_handler __rcu *queue_handler __read_mostly; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 24 | |
Harald Welte | d72367b | 2005-08-09 20:23:36 -0700 | [diff] [blame] | 25 | /* return EBUSY when somebody else is registered, return EEXIST if the |
| 26 | * same handler is registered, return 0 in case of success. */ |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 27 | void nf_register_queue_handler(const struct nf_queue_handler *qh) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 28 | { |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 29 | /* should never happen, we only have one queueing backend in kernel */ |
| 30 | WARN_ON(rcu_access_pointer(queue_handler)); |
| 31 | rcu_assign_pointer(queue_handler, qh); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 32 | } |
| 33 | EXPORT_SYMBOL(nf_register_queue_handler); |
| 34 | |
| 35 | /* The caller must flush their queue before this */ |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 36 | void nf_unregister_queue_handler(void) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 37 | { |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 38 | RCU_INIT_POINTER(queue_handler, NULL); |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 39 | synchronize_rcu(); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 40 | } |
| 41 | EXPORT_SYMBOL(nf_unregister_queue_handler); |
| 42 | |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 43 | static void nf_queue_entry_release_refs(struct nf_queue_entry *entry) |
| 44 | { |
| 45 | /* Release those devices we held, or Alexey will kill me. */ |
| 46 | if (entry->indev) |
| 47 | dev_put(entry->indev); |
| 48 | if (entry->outdev) |
| 49 | dev_put(entry->outdev); |
| 50 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 51 | if (entry->skb->nf_bridge) { |
| 52 | struct nf_bridge_info *nf_bridge = entry->skb->nf_bridge; |
| 53 | |
| 54 | if (nf_bridge->physindev) |
| 55 | dev_put(nf_bridge->physindev); |
| 56 | if (nf_bridge->physoutdev) |
| 57 | dev_put(nf_bridge->physoutdev); |
| 58 | } |
| 59 | #endif |
| 60 | /* Drop reference to owner of hook which queued us. */ |
| 61 | module_put(entry->elem->owner); |
| 62 | } |
| 63 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 64 | /* |
| 65 | * Any packet that leaves via this function must come back |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 66 | * through nf_reinject(). |
| 67 | */ |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 68 | static int __nf_queue(struct sk_buff *skb, |
Michael Wang | 1c15b67 | 2012-08-22 20:00:06 +0000 | [diff] [blame] | 69 | struct nf_hook_ops *elem, |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 70 | u_int8_t pf, unsigned int hook, |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 71 | struct net_device *indev, |
| 72 | struct net_device *outdev, |
| 73 | int (*okfn)(struct sk_buff *), |
| 74 | unsigned int queuenum) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 75 | { |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 76 | int status = -ENOENT; |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 77 | struct nf_queue_entry *entry = NULL; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 78 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 79 | struct net_device *physindev; |
| 80 | struct net_device *physoutdev; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 81 | #endif |
Patrick McHardy | 1e796fd | 2007-12-17 22:42:27 -0800 | [diff] [blame] | 82 | const struct nf_afinfo *afinfo; |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 83 | const struct nf_queue_handler *qh; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 84 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 85 | /* QUEUE == DROP if no one is waiting, to be safe. */ |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 86 | rcu_read_lock(); |
| 87 | |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 88 | qh = rcu_dereference(queue_handler); |
Florian Westphal | 94b27cc | 2011-01-18 16:08:30 +0100 | [diff] [blame] | 89 | if (!qh) { |
| 90 | status = -ESRCH; |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 91 | goto err_unlock; |
Florian Westphal | 94b27cc | 2011-01-18 16:08:30 +0100 | [diff] [blame] | 92 | } |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 93 | |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 94 | afinfo = nf_get_afinfo(pf); |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 95 | if (!afinfo) |
| 96 | goto err_unlock; |
Patrick McHardy | bce8032 | 2006-04-06 14:18:09 -0700 | [diff] [blame] | 97 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 98 | entry = kmalloc(sizeof(*entry) + afinfo->route_key_size, GFP_ATOMIC); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 99 | if (!entry) { |
| 100 | status = -ENOMEM; |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 101 | goto err_unlock; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 102 | } |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 103 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 104 | *entry = (struct nf_queue_entry) { |
| 105 | .skb = skb, |
Michael Wang | 1c15b67 | 2012-08-22 20:00:06 +0000 | [diff] [blame] | 106 | .elem = elem, |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 107 | .pf = pf, |
| 108 | .hook = hook, |
| 109 | .indev = indev, |
| 110 | .outdev = outdev, |
| 111 | .okfn = okfn, |
| 112 | }; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 113 | |
| 114 | /* If it's going away, ignore hook. */ |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 115 | if (!try_module_get(entry->elem->owner)) { |
Florian Westphal | 06cdb63 | 2011-01-18 15:28:38 +0100 | [diff] [blame] | 116 | status = -ECANCELED; |
| 117 | goto err_unlock; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 118 | } |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 119 | /* Bump dev refs so they don't vanish while packet is out */ |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 120 | if (indev) |
| 121 | dev_hold(indev); |
| 122 | if (outdev) |
| 123 | dev_hold(outdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 124 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 125 | if (skb->nf_bridge) { |
| 126 | physindev = skb->nf_bridge->physindev; |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 127 | if (physindev) |
| 128 | dev_hold(physindev); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 129 | physoutdev = skb->nf_bridge->physoutdev; |
Patrick McHardy | 8b1cf0d | 2007-12-05 01:23:17 -0800 | [diff] [blame] | 130 | if (physoutdev) |
| 131 | dev_hold(physoutdev); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 132 | } |
| 133 | #endif |
Eric Dumazet | 7fee226 | 2010-05-11 23:19:48 +0000 | [diff] [blame] | 134 | skb_dst_force(skb); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 135 | afinfo->saveroute(skb, entry); |
| 136 | status = qh->outfn(entry, queuenum); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 137 | |
Yasuyuki Kozakai | 585426f | 2007-07-07 22:40:26 -0700 | [diff] [blame] | 138 | rcu_read_unlock(); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 139 | |
| 140 | if (status < 0) { |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 141 | nf_queue_entry_release_refs(entry); |
| 142 | goto err; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 143 | } |
| 144 | |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 145 | return 0; |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 146 | |
| 147 | err_unlock: |
| 148 | rcu_read_unlock(); |
| 149 | err: |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 150 | kfree(entry); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 151 | return status; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 152 | } |
| 153 | |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 154 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 155 | /* When called from bridge netfilter, skb->data must point to MAC header |
| 156 | * before calling skb_gso_segment(). Else, original MAC header is lost |
| 157 | * and segmented skbs will be sent to wrong destination. |
| 158 | */ |
| 159 | static void nf_bridge_adjust_skb_data(struct sk_buff *skb) |
| 160 | { |
| 161 | if (skb->nf_bridge) |
| 162 | __skb_push(skb, skb->network_header - skb->mac_header); |
| 163 | } |
| 164 | |
| 165 | static void nf_bridge_adjust_segmented_data(struct sk_buff *skb) |
| 166 | { |
| 167 | if (skb->nf_bridge) |
| 168 | __skb_pull(skb, skb->network_header - skb->mac_header); |
| 169 | } |
| 170 | #else |
| 171 | #define nf_bridge_adjust_skb_data(s) do {} while (0) |
| 172 | #define nf_bridge_adjust_segmented_data(s) do {} while (0) |
| 173 | #endif |
| 174 | |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 175 | int nf_queue(struct sk_buff *skb, |
Michael Wang | 1c15b67 | 2012-08-22 20:00:06 +0000 | [diff] [blame] | 176 | struct nf_hook_ops *elem, |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 177 | u_int8_t pf, unsigned int hook, |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 178 | struct net_device *indev, |
| 179 | struct net_device *outdev, |
| 180 | int (*okfn)(struct sk_buff *), |
| 181 | unsigned int queuenum) |
| 182 | { |
| 183 | struct sk_buff *segs; |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 184 | int err = -EINVAL; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 185 | unsigned int queued; |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 186 | |
| 187 | if (!skb_is_gso(skb)) |
| 188 | return __nf_queue(skb, elem, pf, hook, indev, outdev, okfn, |
| 189 | queuenum); |
| 190 | |
| 191 | switch (pf) { |
Jan Engelhardt | 4b1e27e | 2009-04-14 14:26:49 +0200 | [diff] [blame] | 192 | case NFPROTO_IPV4: |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 193 | skb->protocol = htons(ETH_P_IP); |
| 194 | break; |
Jan Engelhardt | 4b1e27e | 2009-04-14 14:26:49 +0200 | [diff] [blame] | 195 | case NFPROTO_IPV6: |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 196 | skb->protocol = htons(ETH_P_IPV6); |
| 197 | break; |
| 198 | } |
| 199 | |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 200 | nf_bridge_adjust_skb_data(skb); |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 201 | segs = skb_gso_segment(skb, 0); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 202 | /* Does not use PTR_ERR to limit the number of error codes that can be |
| 203 | * returned by nf_queue. For instance, callers rely on -ECANCELED to mean |
| 204 | * 'ignore this hook'. |
| 205 | */ |
Hirofumi Nakagawa | 801678c | 2008-04-29 01:03:09 -0700 | [diff] [blame] | 206 | if (IS_ERR(segs)) |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 207 | goto out_err; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 208 | queued = 0; |
| 209 | err = 0; |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 210 | do { |
| 211 | struct sk_buff *nskb = segs->next; |
| 212 | |
| 213 | segs->next = NULL; |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 214 | if (err == 0) { |
| 215 | nf_bridge_adjust_segmented_data(segs); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 216 | err = __nf_queue(segs, elem, pf, hook, indev, |
| 217 | outdev, okfn, queuenum); |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 218 | } |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 219 | if (err == 0) |
| 220 | queued++; |
| 221 | else |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 222 | kfree_skb(segs); |
| 223 | segs = nskb; |
| 224 | } while (segs); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 225 | |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 226 | if (queued) { |
Florian Westphal | 06cdb63 | 2011-01-18 15:28:38 +0100 | [diff] [blame] | 227 | kfree_skb(skb); |
Florian Westphal | a8db7b2 | 2012-02-06 13:23:10 +0100 | [diff] [blame] | 228 | return 0; |
| 229 | } |
| 230 | out_err: |
| 231 | nf_bridge_adjust_segmented_data(skb); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 232 | return err; |
Patrick McHardy | 394f545 | 2006-08-05 00:58:52 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 235 | void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict) |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 236 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 237 | struct sk_buff *skb = entry->skb; |
Michael Wang | 2a6decf | 2012-08-22 19:59:57 +0000 | [diff] [blame] | 238 | struct nf_hook_ops *elem = entry->elem; |
Patrick McHardy | 1e796fd | 2007-12-17 22:42:27 -0800 | [diff] [blame] | 239 | const struct nf_afinfo *afinfo; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 240 | int err; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 241 | |
| 242 | rcu_read_lock(); |
| 243 | |
Patrick McHardy | daaa8be | 2007-12-05 01:27:19 -0800 | [diff] [blame] | 244 | nf_queue_entry_release_refs(entry); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 245 | |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 246 | /* Continue traversal iff userspace said ok... */ |
| 247 | if (verdict == NF_REPEAT) { |
Michael Wang | 2a6decf | 2012-08-22 19:59:57 +0000 | [diff] [blame] | 248 | elem = list_entry(elem->list.prev, struct nf_hook_ops, list); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 249 | verdict = NF_ACCEPT; |
| 250 | } |
| 251 | |
| 252 | if (verdict == NF_ACCEPT) { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 253 | afinfo = nf_get_afinfo(entry->pf); |
| 254 | if (!afinfo || afinfo->reroute(skb, entry) < 0) |
Patrick McHardy | 7a11b98 | 2006-02-27 13:03:24 -0800 | [diff] [blame] | 255 | verdict = NF_DROP; |
| 256 | } |
| 257 | |
| 258 | if (verdict == NF_ACCEPT) { |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 259 | next_hook: |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 260 | verdict = nf_iterate(&nf_hooks[entry->pf][entry->hook], |
| 261 | skb, entry->hook, |
| 262 | entry->indev, entry->outdev, &elem, |
| 263 | entry->okfn, INT_MIN); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | switch (verdict & NF_VERDICT_MASK) { |
| 267 | case NF_ACCEPT: |
Patrick McHardy | 3bc3871 | 2006-07-24 22:52:47 -0700 | [diff] [blame] | 268 | case NF_STOP: |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame] | 269 | local_bh_disable(); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 270 | entry->okfn(skb); |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame] | 271 | local_bh_enable(); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 272 | break; |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 273 | case NF_QUEUE: |
Michael Wang | 1c15b67 | 2012-08-22 20:00:06 +0000 | [diff] [blame] | 274 | err = __nf_queue(skb, elem, entry->pf, entry->hook, |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 275 | entry->indev, entry->outdev, entry->okfn, |
Florian Westphal | f615df7 | 2011-01-18 15:52:14 +0100 | [diff] [blame] | 276 | verdict >> NF_VERDICT_QBITS); |
Florian Westphal | 06cdb63 | 2011-01-18 15:28:38 +0100 | [diff] [blame] | 277 | if (err < 0) { |
| 278 | if (err == -ECANCELED) |
| 279 | goto next_hook; |
Florian Westphal | 94b27cc | 2011-01-18 16:08:30 +0100 | [diff] [blame] | 280 | if (err == -ESRCH && |
| 281 | (verdict & NF_VERDICT_FLAG_QUEUE_BYPASS)) |
| 282 | goto next_hook; |
Florian Westphal | 06cdb63 | 2011-01-18 15:28:38 +0100 | [diff] [blame] | 283 | kfree_skb(skb); |
| 284 | } |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 285 | break; |
Eric Dumazet | 64507fd | 2010-02-19 15:28:38 +0100 | [diff] [blame] | 286 | case NF_STOLEN: |
Julian Anastasov | fad5444 | 2011-08-05 00:36:28 +0000 | [diff] [blame] | 287 | break; |
Patrick McHardy | 3bc3871 | 2006-07-24 22:52:47 -0700 | [diff] [blame] | 288 | default: |
| 289 | kfree_skb(skb); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 290 | } |
| 291 | rcu_read_unlock(); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 292 | kfree(entry); |
Harald Welte | f6ebe77 | 2005-08-09 20:21:49 -0700 | [diff] [blame] | 293 | } |
| 294 | EXPORT_SYMBOL(nf_reinject); |