[NETFILTER]: nfnetlink_log: remove useless prefix length limitation

There is no reason for limiting netlink attributes in size.

Signed-off-by: Patrick McHardy <kaber@trash.net>

2 files changed, 10 insertions, 11 deletions

diff --git a/include/linux/netfilter/nfnetlink_log.h b/include/linux/netfilter/nfnetlink_log.h
index 55a2a2b814ed..5966afa026e9 100644
--- a/include/linux/netfilter/nfnetlink_log.h
+++ b/include/linux/netfilter/nfnetlink_log.h
@@ -32,8 +32,6 @@ struct nfulnl_msg_packet_timestamp {
         aligned_be64    usec;
 };
 
-#define NFULNL_PREFIXLEN        30      /* just like old log target */
-
 enum nfulnl_attr_type {
         NFULA_UNSPEC,
         NFULA_PACKET_HDR,
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index bd3ffa6f1a6d..d1505dd25c66 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -408,7 +408,7 @@ __build_packet_message(struct nfulnl_instance *inst,
                         const struct net_device *indev,
                         const struct net_device *outdev,
                         const struct nf_loginfo *li,
-                        const char *prefix)
+                        const char *prefix, unsigned int plen)
 {
         unsigned char *old_tail;
         struct nfulnl_msg_packet_hdr pmsg;
@@ -432,12 +432,8 @@ __build_packet_message(struct nfulnl_instance *inst,
 
         NFA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg);
 
-        if (prefix) {
-                int slen = strlen(prefix);
-                if (slen > NFULNL_PREFIXLEN)
-                        slen = NFULNL_PREFIXLEN;
-                NFA_PUT(inst->skb, NFULA_PREFIX, slen, prefix);
-        }
+        if (prefix)
+                NFA_PUT(inst->skb, NFULA_PREFIX, plen, prefix);
 
         if (indev) {
                 tmp_uint = htonl(indev->ifindex);
@@ -601,6 +597,7 @@ nfulnl_log_packet(unsigned int pf,
         const struct nf_loginfo *li;
         unsigned int qthreshold;
         unsigned int nlbufsiz;
+        unsigned int plen;
 
         if (li_user && li_user->type == NF_LOG_TYPE_ULOG) 
                 li = li_user;
@@ -616,6 +613,10 @@ nfulnl_log_packet(unsigned int pf,
                 return;
         }
 
+        plen = 0;
+        if (prefix)
+                plen = strlen(prefix);
+
         /* all macros expand to constant values at compile time */
         /* FIXME: do we want to make the size calculation conditional based on
          * what is actually present?  way more branches and checks, but more
@@ -630,7 +631,7 @@ nfulnl_log_packet(unsigned int pf,
 #endif
                 + NFA_SPACE(sizeof(u_int32_t))  /* mark */
                 + NFA_SPACE(sizeof(u_int32_t))  /* uid */
-                + NFA_SPACE(NFULNL_PREFIXLEN)   /* prefix */
+                + NFA_SPACE(plen)               /* prefix */
                 + NFA_SPACE(sizeof(struct nfulnl_msg_packet_hw))
                 + NFA_SPACE(sizeof(struct nfulnl_msg_packet_timestamp));
 
@@ -701,7 +702,7 @@ nfulnl_log_packet(unsigned int pf,
         inst->qlen++;
 
         __build_packet_message(inst, skb, data_len, pf,
-                                hooknum, in, out, li, prefix);
+                                hooknum, in, out, li, prefix, plen);
 
         /* timer_pending always called within inst->lock, so there
          * is no chance of a race here */