[DCCP] ackvec: use u8 for the buf offsets
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
index a979f4e..ce9cb77 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -55,8 +55,8 @@
from = av->dccpav_buf + av->dccpav_buf_head;
/* Check if buf_head wraps */
- if (av->dccpav_buf_head + len > av->dccpav_vec_len) {
- const u32 tailsize = (av->dccpav_vec_len - av->dccpav_buf_head);
+ if ((int)av->dccpav_buf_head + len > av->dccpav_vec_len) {
+ const u32 tailsize = av->dccpav_vec_len - av->dccpav_buf_head;
memcpy(to, from, tailsize);
to += tailsize;
@@ -93,8 +93,14 @@
struct dccp_ackvec *dccp_ackvec_alloc(const unsigned int len,
const gfp_t priority)
{
- struct dccp_ackvec *av = kmalloc(sizeof(*av) + len, priority);
+ struct dccp_ackvec *av;
+ BUG_ON(len == 0);
+
+ if (len > DCCP_MAX_ACKVEC_LEN)
+ return NULL;
+
+ av = kmalloc(sizeof(*av) + len, priority);
if (av != NULL) {
av->dccpav_buf_len = len;
av->dccpav_buf_head =
@@ -117,13 +123,13 @@
}
static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
- const unsigned int index)
+ const u8 index)
{
return av->dccpav_buf[index] & DCCP_ACKVEC_STATE_MASK;
}
static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
- const unsigned int index)
+ const u8 index)
{
return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
}
@@ -135,7 +141,7 @@
*/
static inline int dccp_ackvec_set_buf_head_state(struct dccp_ackvec *av,
const unsigned int packets,
- const unsigned char state)
+ const unsigned char state)
{
unsigned int gap;
signed long new_head;
@@ -223,7 +229,7 @@
* could reduce the complexity of this scan.)
*/
u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
- unsigned int index = av->dccpav_buf_head;
+ u8 index = av->dccpav_buf_head;
while (1) {
const u8 len = dccp_ackvec_len(av, index);
@@ -301,9 +307,10 @@
* draft-ietf-dccp-spec-11.txt Appendix A. -acme
*/
#if 0
- av->dccpav_buf_tail = av->dccpav_ack_ptr + 1;
- if (av->dccpav_buf_tail >= av->dccpav_vec_len)
- av->dccpav_buf_tail -= av->dccpav_vec_len;
+ u32 new_buf_tail = av->dccpav_ack_ptr + 1;
+ if (new_buf_tail >= av->dccpav_vec_len)
+ new_buf_tail -= av->dccpav_vec_len;
+ av->dccpav_buf_tail = new_buf_tail;
#endif
av->dccpav_vec_len -= av->dccpav_sent_len;
}
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index d0fd6c60..f7dfb5f 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -54,16 +54,16 @@
* @dccpav_buf - circular buffer of acknowledgeable packets
*/
struct dccp_ackvec {
- unsigned int dccpav_buf_head;
- unsigned int dccpav_buf_tail;
u64 dccpav_buf_ackno;
u64 dccpav_ack_seqno;
u64 dccpav_ack_ackno;
- unsigned int dccpav_ack_ptr;
- unsigned int dccpav_sent_len;
- unsigned int dccpav_vec_len;
- unsigned int dccpav_buf_len;
struct timeval dccpav_time;
+ u8 dccpav_buf_head;
+ u8 dccpav_buf_tail;
+ u8 dccpav_ack_ptr;
+ u8 dccpav_sent_len;
+ u8 dccpav_vec_len;
+ u8 dccpav_buf_len;
u8 dccpav_buf_nonce;
u8 dccpav_ack_nonce;
u8 dccpav_buf[0];
