#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <linux/netfilter.h>
+#include <linux/proc_fs.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/nfnetlink.h>
#include <asm/atomic.h>
+#ifdef CONFIG_BRIDGE_NETFILTER
+#include "../bridge/br_private.h"
+#endif
+
#define NFQNL_QMAX_DEFAULT 1024
#if 0
struct nfqnl_instance {
struct hlist_node hlist; /* global list of queues */
+ atomic_t use;
int peer_pid;
unsigned int queue_maxlen;
static DEFINE_RWLOCK(instances_lock);
-u_int64_t htonll(u_int64_t in)
-{
- u_int64_t out;
- int i;
-
- for (i = 0; i < sizeof(u_int64_t); i++)
- ((u_int8_t *)&out)[sizeof(u_int64_t)-1] = ((u_int8_t *)&in)[i];
-
- return out;
-}
-
#define INSTANCE_BUCKETS 16
static struct hlist_head instance_table[INSTANCE_BUCKETS];
}
static struct nfqnl_instance *
-instance_lookup(u_int16_t queue_num)
+instance_lookup_get(u_int16_t queue_num)
{
struct nfqnl_instance *inst;
read_lock_bh(&instances_lock);
inst = __instance_lookup(queue_num);
+ if (inst)
+ atomic_inc(&inst->use);
read_unlock_bh(&instances_lock);
return inst;
}
+static void
+instance_put(struct nfqnl_instance *inst)
+{
+ if (inst && atomic_dec_and_test(&inst->use)) {
+ QDEBUG("kfree(inst=%p)\n", inst);
+ kfree(inst);
+ }
+}
+
static struct nfqnl_instance *
instance_create(u_int16_t queue_num, int pid)
{
QDEBUG("entering for queue_num=%u, pid=%d\n", queue_num, pid);
- write_lock_bh(&instances_lock);
+ write_lock_bh(&instances_lock);
if (__instance_lookup(queue_num)) {
inst = NULL;
QDEBUG("aborting, instance already exists\n");
goto out_unlock;
}
- inst = kmalloc(sizeof(*inst), GFP_ATOMIC);
+ inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
if (!inst)
goto out_unlock;
- memset(inst, 0, sizeof(*inst));
inst->queue_num = queue_num;
inst->peer_pid = pid;
inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
inst->copy_range = 0xfffff;
inst->copy_mode = NFQNL_COPY_NONE;
atomic_set(&inst->id_sequence, 0);
- inst->lock = SPIN_LOCK_UNLOCKED;
+ /* needs to be two, since we _put() after creation */
+ atomic_set(&inst->use, 2);
+ spin_lock_init(&inst->lock);
INIT_LIST_HEAD(&inst->queue_list);
if (!try_module_get(THIS_MODULE))
goto out_free;
- hlist_add_head(&inst->hlist,
+ hlist_add_head(&inst->hlist,
&instance_table[instance_hashfn(queue_num)]);
write_unlock_bh(&instances_lock);
/* then flush all pending skbs from the queue */
nfqnl_flush(inst, NF_DROP);
- /* and finally free the data structure */
- kfree(inst);
+ /* and finally put the refcount */
+ instance_put(inst);
module_put(THIS_MODULE);
}
* entry if cmpfn is NULL.
*/
static inline struct nfqnl_queue_entry *
-__find_entry(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
+__find_entry(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
unsigned long data)
{
struct list_head *p;
list_for_each_prev(p, &queue->queue_list) {
struct nfqnl_queue_entry *entry = (struct nfqnl_queue_entry *)p;
-
+
if (!cmpfn || cmpfn(entry, data))
return entry;
}
__nfqnl_flush(struct nfqnl_instance *queue, int verdict)
{
struct nfqnl_queue_entry *entry;
-
+
while ((entry = __find_dequeue_entry(queue, NULL, 0)))
issue_verdict(entry, verdict);
}
unsigned char mode, unsigned int range)
{
int status = 0;
-
+
switch (mode) {
case NFQNL_COPY_NONE:
case NFQNL_COPY_META:
queue->copy_mode = mode;
queue->copy_range = 0;
break;
-
+
case NFQNL_COPY_PACKET:
queue->copy_mode = mode;
/* we're using struct nfattr which has 16bit nfa_len */
else
queue->copy_range = range;
break;
-
+
default:
status = -EINVAL;
nfqnl_cmpfn cmpfn, unsigned long data)
{
struct nfqnl_queue_entry *entry;
-
+
spin_lock_bh(&queue->lock);
entry = __find_dequeue_entry(queue, cmpfn, data);
spin_unlock_bh(&queue->lock);
struct nfqnl_msg_packet_hdr pmsg;
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
- unsigned int tmp_uint;
+ struct nf_info *entinf = entry->info;
+ struct sk_buff *entskb = entry->skb;
+ struct net_device *indev;
+ struct net_device *outdev;
+ __be32 tmp_uint;
QDEBUG("entered\n");
/* all macros expand to constant values at compile time */
- size = NLMSG_SPACE(sizeof(struct nfqnl_msg_packet_hdr))
- + NLMSG_SPACE(sizeof(u_int32_t)) /* ifindex */
- + NLMSG_SPACE(sizeof(u_int32_t)) /* ifindex */
- + NLMSG_SPACE(sizeof(u_int32_t)) /* mark */
- + NLMSG_SPACE(sizeof(struct nfqnl_msg_packet_hw))
- + NLMSG_SPACE(sizeof(struct nfqnl_msg_packet_timestamp));
+ size = NLMSG_SPACE(sizeof(struct nfgenmsg)) +
+ + NFA_SPACE(sizeof(struct nfqnl_msg_packet_hdr))
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+#ifdef CONFIG_BRIDGE_NETFILTER
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+#endif
+ + NFA_SPACE(sizeof(u_int32_t)) /* mark */
+ + NFA_SPACE(sizeof(struct nfqnl_msg_packet_hw))
+ + NFA_SPACE(sizeof(struct nfqnl_msg_packet_timestamp));
+
+ outdev = entinf->outdev;
spin_lock_bh(&queue->lock);
-
+
switch (queue->copy_mode) {
case NFQNL_COPY_META:
case NFQNL_COPY_NONE:
data_len = 0;
break;
-
+
case NFQNL_COPY_PACKET:
- if (queue->copy_range == 0
- || queue->copy_range > entry->skb->len)
- data_len = entry->skb->len;
+ if ((entskb->ip_summed == CHECKSUM_PARTIAL ||
+ entskb->ip_summed == CHECKSUM_COMPLETE) &&
+ (*errp = skb_checksum_help(entskb))) {
+ spin_unlock_bh(&queue->lock);
+ return NULL;
+ }
+ if (queue->copy_range == 0
+ || queue->copy_range > entskb->len)
+ data_len = entskb->len;
else
data_len = queue->copy_range;
-
- size += NLMSG_SPACE(data_len);
+
+ size += NFA_SPACE(data_len);
break;
-
+
default:
*errp = -EINVAL;
spin_unlock_bh(&queue->lock);
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb)
goto nlmsg_failure;
-
+
old_tail= skb->tail;
- nlh = NLMSG_PUT(skb, 0, 0,
+ nlh = NLMSG_PUT(skb, 0, 0,
NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
- nfmsg->nfgen_family = entry->info->pf;
+ nfmsg->nfgen_family = entinf->pf;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(queue->queue_num);
pmsg.packet_id = htonl(entry->id);
- pmsg.hw_protocol = htons(entry->skb->protocol);
- pmsg.hook = entry->info->hook;
+ pmsg.hw_protocol = entskb->protocol;
+ pmsg.hook = entinf->hook;
NFA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg);
- if (entry->info->indev) {
- tmp_uint = htonl(entry->info->indev->ifindex);
+ indev = entinf->indev;
+ if (indev) {
+ tmp_uint = htonl(indev->ifindex);
+#ifndef CONFIG_BRIDGE_NETFILTER
NFA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), &tmp_uint);
+#else
+ if (entinf->pf == PF_BRIDGE) {
+ /* Case 1: indev is physical input device, we need to
+ * look for bridge group (when called from
+ * netfilter_bridge) */
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ /* this is the bridge group "brX" */
+ tmp_uint = htonl(indev->br_port->br->dev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ } else {
+ /* Case 2: indev is bridge group, we need to look for
+ * physical device (when called from ipv4) */
+ NFA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ if (entskb->nf_bridge
+ && entskb->nf_bridge->physindev) {
+ tmp_uint = htonl(entskb->nf_bridge->physindev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSINDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ }
+ }
+#endif
}
- if (entry->info->outdev) {
- tmp_uint = htonl(entry->info->outdev->ifindex);
+ if (outdev) {
+ tmp_uint = htonl(outdev->ifindex);
+#ifndef CONFIG_BRIDGE_NETFILTER
NFA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), &tmp_uint);
+#else
+ if (entinf->pf == PF_BRIDGE) {
+ /* Case 1: outdev is physical output device, we need to
+ * look for bridge group (when called from
+ * netfilter_bridge) */
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ /* this is the bridge group "brX" */
+ tmp_uint = htonl(outdev->br_port->br->dev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ } else {
+ /* Case 2: outdev is bridge group, we need to look for
+ * physical output device (when called from ipv4) */
+ NFA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ if (entskb->nf_bridge
+ && entskb->nf_bridge->physoutdev) {
+ tmp_uint = htonl(entskb->nf_bridge->physoutdev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ }
+ }
+#endif
}
- if (entry->skb->nfmark) {
- tmp_uint = htonl(entry->skb->nfmark);
+ if (entskb->mark) {
+ tmp_uint = htonl(entskb->mark);
NFA_PUT(skb, NFQA_MARK, sizeof(u_int32_t), &tmp_uint);
}
- if (entry->info->indev && entry->skb->dev
- && entry->skb->dev->hard_header_parse) {
+ if (indev && entskb->dev
+ && entskb->dev->hard_header_parse) {
struct nfqnl_msg_packet_hw phw;
- phw.hw_addrlen =
- entry->skb->dev->hard_header_parse(entry->skb,
- phw.hw_addr);
- phw.hw_addrlen = htons(phw.hw_addrlen);
+ int len = entskb->dev->hard_header_parse(entskb,
+ phw.hw_addr);
+ phw.hw_addrlen = htons(len);
NFA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw);
}
- if (entry->skb->stamp.tv_sec) {
+ if (entskb->tstamp.off_sec) {
struct nfqnl_msg_packet_timestamp ts;
- ts.sec = htonll(entry->skb->stamp.tv_sec);
- ts.usec = htonll(entry->skb->stamp.tv_usec);
+ ts.sec = cpu_to_be64(entskb->tstamp.off_sec);
+ ts.usec = cpu_to_be64(entskb->tstamp.off_usec);
NFA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts);
}
nfa->nfa_type = NFQA_PAYLOAD;
nfa->nfa_len = size;
- if (skb_copy_bits(entry->skb, 0, NFA_DATA(nfa), data_len))
+ if (skb_copy_bits(entskb, 0, NFA_DATA(nfa), data_len))
BUG();
}
-
+
nlh->nlmsg_len = skb->tail - old_tail;
return skb;
}
static int
-nfqnl_enqueue_packet(struct sk_buff *skb, struct nf_info *info,
+nfqnl_enqueue_packet(struct sk_buff *skb, struct nf_info *info,
unsigned int queuenum, void *data)
{
int status = -EINVAL;
QDEBUG("entered\n");
- queue = instance_lookup(queuenum);
+ queue = instance_lookup_get(queuenum);
if (!queue) {
QDEBUG("no queue instance matching\n");
return -EINVAL;
if (queue->copy_mode == NFQNL_COPY_NONE) {
QDEBUG("mode COPY_NONE, aborting\n");
- return -EAGAIN;
+ status = -EAGAIN;
+ goto err_out_put;
}
entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
if (entry == NULL) {
if (net_ratelimit())
- printk(KERN_ERR
+ printk(KERN_ERR
"nf_queue: OOM in nfqnl_enqueue_packet()\n");
- return -ENOMEM;
+ status = -ENOMEM;
+ goto err_out_put;
}
entry->info = info;
nskb = nfqnl_build_packet_message(queue, entry, &status);
if (nskb == NULL)
goto err_out_free;
-
+
spin_lock_bh(&queue->lock);
-
+
if (!queue->peer_pid)
- goto err_out_free_nskb;
+ goto err_out_free_nskb;
if (queue->queue_total >= queue->queue_maxlen) {
- queue->queue_dropped++;
+ queue->queue_dropped++;
status = -ENOSPC;
if (net_ratelimit())
- printk(KERN_WARNING "ip_queue: full at %d entries, "
- "dropping packets(s). Dropped: %d\n",
+ printk(KERN_WARNING "nf_queue: full at %d entries, "
+ "dropping packets(s). Dropped: %d\n",
queue->queue_total, queue->queue_dropped);
goto err_out_free_nskb;
}
/* nfnetlink_unicast will either free the nskb or add it to a socket */
status = nfnetlink_unicast(nskb, queue->peer_pid, MSG_DONTWAIT);
if (status < 0) {
- queue->queue_user_dropped++;
+ queue->queue_user_dropped++;
goto err_out_unlock;
}
__enqueue_entry(queue, entry);
spin_unlock_bh(&queue->lock);
+ instance_put(queue);
return status;
err_out_free_nskb:
- kfree_skb(nskb);
-
+ kfree_skb(nskb);
+
err_out_unlock:
spin_unlock_bh(&queue->lock);
err_out_free:
kfree(entry);
+err_out_put:
+ instance_put(queue);
return status;
}
int diff;
diff = data_len - e->skb->len;
- if (diff < 0)
- skb_trim(e->skb, data_len);
- else if (diff > 0) {
+ if (diff < 0) {
+ if (pskb_trim(e->skb, data_len))
+ return -ENOMEM;
+ } else if (diff > 0) {
if (data_len > 0xFFFF)
return -EINVAL;
if (diff > skb_tailroom(e->skb)) {
struct sk_buff *newskb;
-
+
newskb = skb_copy_expand(e->skb,
- skb_headroom(e->skb),
- diff,
- GFP_ATOMIC);
+ skb_headroom(e->skb),
+ diff,
+ GFP_ATOMIC);
if (newskb == NULL) {
- printk(KERN_WARNING "ip_queue: OOM "
+ printk(KERN_WARNING "nf_queue: OOM "
"in mangle, dropping packet\n");
return -ENOMEM;
}
if (!skb_make_writable(&e->skb, data_len))
return -ENOMEM;
memcpy(e->skb->data, data, data_len);
-
+ e->skb->ip_summed = CHECKSUM_NONE;
return 0;
}
static int
dev_cmp(struct nfqnl_queue_entry *entry, unsigned long ifindex)
{
- if (entry->info->indev)
- if (entry->info->indev->ifindex == ifindex)
+ struct nf_info *entinf = entry->info;
+
+ if (entinf->indev)
+ if (entinf->indev->ifindex == ifindex)
return 1;
-
- if (entry->info->outdev)
- if (entry->info->outdev->ifindex == ifindex)
+ if (entinf->outdev)
+ if (entinf->outdev->ifindex == ifindex)
return 1;
-
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (entry->skb->nf_bridge) {
+ if (entry->skb->nf_bridge->physindev &&
+ entry->skb->nf_bridge->physindev->ifindex == ifindex)
+ return 1;
+ if (entry->skb->nf_bridge->physoutdev &&
+ entry->skb->nf_bridge->physoutdev->ifindex == ifindex)
+ return 1;
+ }
+#endif
return 0;
}
nfqnl_dev_drop(int ifindex)
{
int i;
-
+
QDEBUG("entering for ifindex %u\n", ifindex);
/* this only looks like we have to hold the readlock for a way too long
hlist_for_each_entry(inst, tmp, head, hlist) {
struct nfqnl_queue_entry *entry;
- while ((entry = find_dequeue_entry(inst, dev_cmp,
+ while ((entry = find_dequeue_entry(inst, dev_cmp,
ifindex)) != NULL)
issue_verdict(entry, NF_DROP);
}
.notifier_call = nfqnl_rcv_nl_event,
};
+static const int nfqa_verdict_min[NFQA_MAX] = {
+ [NFQA_VERDICT_HDR-1] = sizeof(struct nfqnl_msg_verdict_hdr),
+ [NFQA_MARK-1] = sizeof(u_int32_t),
+ [NFQA_PAYLOAD-1] = 0,
+};
+
static int
nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
struct nfqnl_instance *queue;
unsigned int verdict;
struct nfqnl_queue_entry *entry;
+ int err;
+
+ if (nfattr_bad_size(nfqa, NFQA_MAX, nfqa_verdict_min)) {
+ QDEBUG("bad attribute size\n");
+ return -EINVAL;
+ }
- queue = instance_lookup(queue_num);
+ queue = instance_lookup_get(queue_num);
if (!queue)
return -ENODEV;
- if (queue->peer_pid != NETLINK_CB(skb).pid)
- return -EPERM;
+ if (queue->peer_pid != NETLINK_CB(skb).pid) {
+ err = -EPERM;
+ goto err_out_put;
+ }
- if (!nfqa[NFQA_VERDICT_HDR-1])
- return -EINVAL;
+ if (!nfqa[NFQA_VERDICT_HDR-1]) {
+ err = -EINVAL;
+ goto err_out_put;
+ }
vhdr = NFA_DATA(nfqa[NFQA_VERDICT_HDR-1]);
verdict = ntohl(vhdr->verdict);
- if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT)
- return -EINVAL;
+ if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) {
+ err = -EINVAL;
+ goto err_out_put;
+ }
entry = find_dequeue_entry(queue, id_cmp, ntohl(vhdr->id));
- if (entry == NULL)
- return -ENOENT;
+ if (entry == NULL) {
+ err = -ENOENT;
+ goto err_out_put;
+ }
if (nfqa[NFQA_PAYLOAD-1]) {
if (nfqnl_mangle(NFA_DATA(nfqa[NFQA_PAYLOAD-1]),
}
if (nfqa[NFQA_MARK-1])
- skb->nfmark = ntohl(*(u_int32_t *)NFA_DATA(nfqa[NFQA_MARK-1]));
-
+ entry->skb->mark = ntohl(*(__be32 *)
+ NFA_DATA(nfqa[NFQA_MARK-1]));
+
issue_verdict(entry, verdict);
+ instance_put(queue);
return 0;
+
+err_out_put:
+ instance_put(queue);
+ return err;
}
static int
return -ENOTSUPP;
}
+static const int nfqa_cfg_min[NFQA_CFG_MAX] = {
+ [NFQA_CFG_CMD-1] = sizeof(struct nfqnl_msg_config_cmd),
+ [NFQA_CFG_PARAMS-1] = sizeof(struct nfqnl_msg_config_params),
+};
+
+static struct nf_queue_handler nfqh = {
+ .name = "nf_queue",
+ .outfn = &nfqnl_enqueue_packet,
+};
+
static int
nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
u_int16_t queue_num = ntohs(nfmsg->res_id);
struct nfqnl_instance *queue;
+ int ret = 0;
QDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type));
- queue = instance_lookup(queue_num);
+ if (nfattr_bad_size(nfqa, NFQA_CFG_MAX, nfqa_cfg_min)) {
+ QDEBUG("bad attribute size\n");
+ return -EINVAL;
+ }
+
+ queue = instance_lookup_get(queue_num);
if (nfqa[NFQA_CFG_CMD-1]) {
struct nfqnl_msg_config_cmd *cmd;
cmd = NFA_DATA(nfqa[NFQA_CFG_CMD-1]);
if (!queue)
return -ENODEV;
- if (queue->peer_pid != NETLINK_CB(skb).pid)
- return -EPERM;
+ if (queue->peer_pid != NETLINK_CB(skb).pid) {
+ ret = -EPERM;
+ goto out_put;
+ }
instance_destroy(queue);
break;
case NFQNL_CFG_CMD_PF_BIND:
QDEBUG("registering queue handler for pf=%u\n",
ntohs(cmd->pf));
- return nf_register_queue_handler(ntohs(cmd->pf),
- nfqnl_enqueue_packet,
- NULL);
-
+ ret = nf_register_queue_handler(ntohs(cmd->pf), &nfqh);
break;
case NFQNL_CFG_CMD_PF_UNBIND:
QDEBUG("unregistering queue handler for pf=%u\n",
ntohs(cmd->pf));
/* This is a bug and a feature. We can unregister
* other handlers(!) */
- return nf_unregister_queue_handler(ntohs(cmd->pf));
+ ret = nf_unregister_queue_handler(ntohs(cmd->pf));
break;
default:
- return -EINVAL;
+ ret = -EINVAL;
+ break;
}
} else {
if (!queue) {
QDEBUG("no config command, and no instance ENOENT\n");
- return -ENOENT;
+ ret = -ENOENT;
+ goto out_put;
}
if (queue->peer_pid != NETLINK_CB(skb).pid) {
QDEBUG("no config command, and wrong pid\n");
- return -EPERM;
+ ret = -EPERM;
+ goto out_put;
}
}
if (nfqa[NFQA_CFG_PARAMS-1]) {
struct nfqnl_msg_config_params *params;
- params = NFA_DATA(nfqa[NFQA_CFG_PARAMS-1]);
+ if (!queue) {
+ ret = -ENOENT;
+ goto out_put;
+ }
+ params = NFA_DATA(nfqa[NFQA_CFG_PARAMS-1]);
nfqnl_set_mode(queue, params->copy_mode,
ntohl(params->copy_range));
}
- return 0;
+ if (nfqa[NFQA_CFG_QUEUE_MAXLEN-1]) {
+ __be32 *queue_maxlen;
+ queue_maxlen = NFA_DATA(nfqa[NFQA_CFG_QUEUE_MAXLEN-1]);
+ spin_lock_bh(&queue->lock);
+ queue->queue_maxlen = ntohl(*queue_maxlen);
+ spin_unlock_bh(&queue->lock);
+ }
+
+out_put:
+ instance_put(queue);
+ return ret;
}
static struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
[NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp,
- .cap_required = CAP_NET_ADMIN },
+ .attr_count = NFQA_MAX, },
[NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict,
- .cap_required = CAP_NET_ADMIN },
+ .attr_count = NFQA_MAX, },
[NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config,
- .cap_required = CAP_NET_ADMIN },
+ .attr_count = NFQA_CFG_MAX, },
};
static struct nfnetlink_subsystem nfqnl_subsys = {
.name = "nf_queue",
.subsys_id = NFNL_SUBSYS_QUEUE,
.cb_count = NFQNL_MSG_MAX,
- .attr_count = NFQA_MAX,
.cb = nfqnl_cb,
};
-static int
-init_or_cleanup(int init)
+#ifdef CONFIG_PROC_FS
+struct iter_state {
+ unsigned int bucket;
+};
+
+static struct hlist_node *get_first(struct seq_file *seq)
+{
+ struct iter_state *st = seq->private;
+
+ if (!st)
+ return NULL;
+
+ for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
+ if (!hlist_empty(&instance_table[st->bucket]))
+ return instance_table[st->bucket].first;
+ }
+ return NULL;
+}
+
+static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
+{
+ struct iter_state *st = seq->private;
+
+ h = h->next;
+ while (!h) {
+ if (++st->bucket >= INSTANCE_BUCKETS)
+ return NULL;
+
+ h = instance_table[st->bucket].first;
+ }
+ return h;
+}
+
+static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct hlist_node *head;
+ head = get_first(seq);
+
+ if (head)
+ while (pos && (head = get_next(seq, head)))
+ pos--;
+ return pos ? NULL : head;
+}
+
+static void *seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock_bh(&instances_lock);
+ return get_idx(seq, *pos);
+}
+
+static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return get_next(s, v);
+}
+
+static void seq_stop(struct seq_file *s, void *v)
+{
+ read_unlock_bh(&instances_lock);
+}
+
+static int seq_show(struct seq_file *s, void *v)
+{
+ const struct nfqnl_instance *inst = v;
+
+ return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n",
+ inst->queue_num,
+ inst->peer_pid, inst->queue_total,
+ inst->copy_mode, inst->copy_range,
+ inst->queue_dropped, inst->queue_user_dropped,
+ atomic_read(&inst->id_sequence),
+ atomic_read(&inst->use));
+}
+
+static struct seq_operations nfqnl_seq_ops = {
+ .start = seq_start,
+ .next = seq_next,
+ .stop = seq_stop,
+ .show = seq_show,
+};
+
+static int nfqnl_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct iter_state *is;
+ int ret;
+
+ is = kzalloc(sizeof(*is), GFP_KERNEL);
+ if (!is)
+ return -ENOMEM;
+ ret = seq_open(file, &nfqnl_seq_ops);
+ if (ret < 0)
+ goto out_free;
+ seq = file->private_data;
+ seq->private = is;
+ return ret;
+out_free:
+ kfree(is);
+ return ret;
+}
+
+static const struct file_operations nfqnl_file_ops = {
+ .owner = THIS_MODULE,
+ .open = nfqnl_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+#endif /* PROC_FS */
+
+static int __init nfnetlink_queue_init(void)
{
- int status = -ENOMEM;
-
- if (!init)
- goto cleanup;
+ int i, status = -ENOMEM;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_nfqueue;
+#endif
+
+ for (i = 0; i < INSTANCE_BUCKETS; i++)
+ INIT_HLIST_HEAD(&instance_table[i]);
netlink_register_notifier(&nfqnl_rtnl_notifier);
status = nfnetlink_subsys_register(&nfqnl_subsys);
goto cleanup_netlink_notifier;
}
+#ifdef CONFIG_PROC_FS
+ proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440,
+ proc_net_netfilter);
+ if (!proc_nfqueue)
+ goto cleanup_subsys;
+ proc_nfqueue->proc_fops = &nfqnl_file_ops;
+#endif
+
register_netdevice_notifier(&nfqnl_dev_notifier);
return status;
-cleanup:
- nf_unregister_queue_handlers(nfqnl_enqueue_packet);
- unregister_netdevice_notifier(&nfqnl_dev_notifier);
+#ifdef CONFIG_PROC_FS
+cleanup_subsys:
nfnetlink_subsys_unregister(&nfqnl_subsys);
-
+#endif
cleanup_netlink_notifier:
netlink_unregister_notifier(&nfqnl_rtnl_notifier);
return status;
}
-static int __init init(void)
-{
-
- return init_or_cleanup(1);
-}
-
-static void __exit fini(void)
+static void __exit nfnetlink_queue_fini(void)
{
- init_or_cleanup(0);
+ nf_unregister_queue_handlers(&nfqh);
+ unregister_netdevice_notifier(&nfqnl_dev_notifier);
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("nfnetlink_queue", proc_net_netfilter);
+#endif
+ nfnetlink_subsys_unregister(&nfqnl_subsys);
+ netlink_unregister_notifier(&nfqnl_rtnl_notifier);
}
MODULE_DESCRIPTION("netfilter packet queue handler");
MODULE_LICENSE("GPL");
MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
-module_init(init);
-module_exit(fini);
+module_init(nfnetlink_queue_init);
+module_exit(nfnetlink_queue_fini);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff