net: Remove state argument from skb_find_text()

Although it is clear that textsearch state is intentionally passed to
skb_find_text() as uninitialized argument, it was never used by the
callers. Therefore, we can simplify skb_find_text() by making it
local variable.

Signed-off-by: Bojan Prtvar <prtvar.b@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 30007af..d898b32 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -870,8 +870,7 @@ unsigned int skb_seq_read(unsigned int consumed, const u8 **data,
 void skb_abort_seq_read(struct skb_seq_state *st);
 
 unsigned int skb_find_text(struct sk_buff *skb, unsigned int from,
-                          unsigned int to, struct ts_config *config,
-                          struct ts_state *state);
+                          unsigned int to, struct ts_config *config);
 
 /*
  * Packet hash types specify the type of hash in skb_set_hash.

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 88c613e..374e43b 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2865,7 +2865,6 @@ static void skb_ts_finish(struct ts_config *conf, struct ts_state *state)
  * @from: search offset
  * @to: search limit
  * @config: textsearch configuration
- * @state: uninitialized textsearch state variable
  *
  * Finds a pattern in the skb data according to the specified
  * textsearch configuration. Use textsearch_next() to retrieve
@@ -2873,17 +2872,17 @@ static void skb_ts_finish(struct ts_config *conf, struct ts_state *state)
  * to the first occurrence or UINT_MAX if no match was found.
  */
 unsigned int skb_find_text(struct sk_buff *skb, unsigned int from,
-                          unsigned int to, struct ts_config *config,
-                          struct ts_state *state)
+                          unsigned int to, struct ts_config *config)
 {
+       struct ts_state state;
        unsigned int ret;
 
        config->get_next_block = skb_ts_get_next_block;
        config->finish = skb_ts_finish;
 
-       skb_prepare_seq_read(skb, from, to, TS_SKB_CB(state));
+       skb_prepare_seq_read(skb, from, to, TS_SKB_CB(&state));
 
-       ret = textsearch_find(config, state);
+       ret = textsearch_find(config, &state);
        return (ret <= to - from ? ret : UINT_MAX);
 }
 EXPORT_SYMBOL(skb_find_text);

diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c
index b8b95f4..57a26cc 100644 (file)
--- a/net/netfilter/nf_conntrack_amanda.c
+++ b/net/netfilter/nf_conntrack_amanda.c
@@ -88,7 +88,6 @@ static int amanda_help(struct sk_buff *skb,
                       struct nf_conn *ct,
                       enum ip_conntrack_info ctinfo)
 {
-       struct ts_state ts;
        struct nf_conntrack_expect *exp;
        struct nf_conntrack_tuple *tuple;
        unsigned int dataoff, start, stop, off, i;
@@ -113,23 +112,20 @@ static int amanda_help(struct sk_buff *skb,
                return NF_ACCEPT;
        }
 
-       memset(&ts, 0, sizeof(ts));
        start = skb_find_text(skb, dataoff, skb->len,
-                             search[SEARCH_CONNECT].ts, &ts);
+                             search[SEARCH_CONNECT].ts);
        if (start == UINT_MAX)
                goto out;
        start += dataoff + search[SEARCH_CONNECT].len;
 
-       memset(&ts, 0, sizeof(ts));
        stop = skb_find_text(skb, start, skb->len,
-                            search[SEARCH_NEWLINE].ts, &ts);
+                            search[SEARCH_NEWLINE].ts);
        if (stop == UINT_MAX)
                goto out;
        stop += start;
 
        for (i = SEARCH_DATA; i <= SEARCH_INDEX; i++) {
-               memset(&ts, 0, sizeof(ts));
-               off = skb_find_text(skb, start, stop, search[i].ts, &ts);
+               off = skb_find_text(skb, start, stop, search[i].ts);
                if (off == UINT_MAX)
                        continue;
                off += start + search[i].len;

diff --git a/net/netfilter/xt_string.c b/net/netfilter/xt_string.c
index 5699adb..0bc3460 100644 (file)
--- a/net/netfilter/xt_string.c
+++ b/net/netfilter/xt_string.c
@@ -26,13 +26,12 @@ static bool
 string_mt(const struct sk_buff *skb, struct xt_action_param *par)
 {
        const struct xt_string_info *conf = par->matchinfo;
-       struct ts_state state;
        bool invert;
 
        invert = conf->u.v1.flags & XT_STRING_FLAG_INVERT;
 
        return (skb_find_text((struct sk_buff *)skb, conf->from_offset,
-                            conf->to_offset, conf->config, &state)
+                            conf->to_offset, conf->config)
                             != UINT_MAX) ^ invert;
 }
 

diff --git a/net/sched/em_text.c b/net/sched/em_text.c
index f03c3de..73e2ed5 100644 (file)
--- a/net/sched/em_text.c
+++ b/net/sched/em_text.c
@@ -34,7 +34,6 @@ static int em_text_match(struct sk_buff *skb, struct tcf_ematch *m,
 {
        struct text_match *tm = EM_TEXT_PRIV(m);
        int from, to;
-       struct ts_state state;
 
        from = tcf_get_base_ptr(skb, tm->from_layer) - skb->data;
        from += tm->from_offset;
@@ -42,7 +41,7 @@ static int em_text_match(struct sk_buff *skb, struct tcf_ematch *m,
        to = tcf_get_base_ptr(skb, tm->to_layer) - skb->data;
        to += tm->to_offset;
 
-       return skb_find_text(skb, from, to, tm->config, &state) != UINT_MAX;
+       return skb_find_text(skb, from, to, tm->config) != UINT_MAX;
 }
 
 static int em_text_change(struct net *net, void *data, int len,