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net: Remove state argument from skb_find_text()

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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>
This commit is contained in:
Bojan Prtvar 2015-02-22 11:46:35 +01:00 committed by David S. Miller
parent d340c862e7
commit 059a2440fd
5 changed files with 10 additions and 18 deletions
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3
include/linux/skbuff.h
View File

@ -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.

9
net/core/skbuff.c
View File

@ -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);

10
net/netfilter/nf_conntrack_amanda.c
View File

@ -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;

3
net/netfilter/xt_string.c
View File

@ -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;
}

3
net/sched/em_text.c
View File

@ -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,