Commit 79af02c2 authored by David S. Miller's avatar David S. Miller
Browse files

[SCTP]: Use struct list_head for chunk lists, not sk_buff_head.


Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9c05989b
......@@ -582,7 +582,6 @@ void sctp_datamsg_track(struct sctp_chunk *);
void sctp_chunk_fail(struct sctp_chunk *, int error);
int sctp_chunk_abandoned(struct sctp_chunk *);
/* RFC2960 1.4 Key Terms
*
* o Chunk: A unit of information within an SCTP packet, consisting of
......@@ -592,13 +591,8 @@ int sctp_chunk_abandoned(struct sctp_chunk *);
* each chunk as well as a few other header pointers...
*/
struct sctp_chunk {
/* These first three elements MUST PRECISELY match the first
* three elements of struct sk_buff. This allows us to reuse
* all the skb_* queue management functions.
*/
struct sctp_chunk *next;
struct sctp_chunk *prev;
struct sk_buff_head *list;
struct list_head list;
atomic_t refcnt;
/* This is our link to the per-transport transmitted list. */
......@@ -717,7 +711,7 @@ struct sctp_packet {
__u32 vtag;
/* This contains the payload chunks. */
struct sk_buff_head chunks;
struct list_head chunk_list;
/* This is the overhead of the sctp and ip headers. */
size_t overhead;
......@@ -974,7 +968,7 @@ struct sctp_inq {
/* This is actually a queue of sctp_chunk each
* containing a partially decoded packet.
*/
struct sk_buff_head in;
struct list_head in_chunk_list;
/* This is the packet which is currently off the in queue and is
* being worked on through the inbound chunk processing.
*/
......@@ -1017,7 +1011,7 @@ struct sctp_outq {
struct sctp_association *asoc;
/* Data pending that has never been transmitted. */
struct sk_buff_head out;
struct list_head out_chunk_list;
unsigned out_qlen; /* Total length of queued data chunks. */
......@@ -1025,7 +1019,7 @@ struct sctp_outq {
unsigned error;
/* These are control chunks we want to send. */
struct sk_buff_head control;
struct list_head control_chunk_list;
/* These are chunks that have been sacked but are above the
* CTSN, or cumulative tsn ack point.
......@@ -1672,7 +1666,7 @@ struct sctp_association {
* which already resides in sctp_outq. Please move this
* queue and its supporting logic down there. --piggy]
*/
struct sk_buff_head addip_chunks;
struct list_head addip_chunk_list;
/* ADDIP Section 4.1 ASCONF Chunk Procedures
*
......
......@@ -203,7 +203,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
*/
asoc->addip_serial = asoc->c.initial_tsn;
skb_queue_head_init(&asoc->addip_chunks);
INIT_LIST_HEAD(&asoc->addip_chunk_list);
/* Make an empty list of remote transport addresses. */
INIT_LIST_HEAD(&asoc->peer.transport_addr_list);
......
......@@ -115,6 +115,17 @@ static void sctp_rcv_set_owner_r(struct sk_buff *skb, struct sock *sk)
atomic_add(sizeof(struct sctp_chunk),&sk->sk_rmem_alloc);
}
struct sctp_input_cb {
union {
struct inet_skb_parm h4;
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
struct inet6_skb_parm h6;
#endif
} header;
struct sctp_chunk *chunk;
};
#define SCTP_INPUT_CB(__skb) ((struct sctp_input_cb *)&((__skb)->cb[0]))
/*
* This is the routine which IP calls when receiving an SCTP packet.
*/
......@@ -243,6 +254,7 @@ int sctp_rcv(struct sk_buff *skb)
ret = -ENOMEM;
goto discard_release;
}
SCTP_INPUT_CB(skb)->chunk = chunk;
sctp_rcv_set_owner_r(skb,sk);
......@@ -265,9 +277,9 @@ int sctp_rcv(struct sk_buff *skb)
sctp_bh_lock_sock(sk);
if (sock_owned_by_user(sk))
sk_add_backlog(sk, (struct sk_buff *) chunk);
sk_add_backlog(sk, skb);
else
sctp_backlog_rcv(sk, (struct sk_buff *) chunk);
sctp_backlog_rcv(sk, skb);
/* Release the sock and any reference counts we took in the
* lookup calls.
......@@ -302,14 +314,8 @@ discard_release:
*/
int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
struct sctp_chunk *chunk;
struct sctp_inq *inqueue;
/* One day chunk will live inside the skb, but for
* now this works.
*/
chunk = (struct sctp_chunk *) skb;
inqueue = &chunk->rcvr->inqueue;
struct sctp_chunk *chunk = SCTP_INPUT_CB(skb)->chunk;
struct sctp_inq *inqueue = &chunk->rcvr->inqueue;
sctp_inq_push(inqueue, chunk);
return 0;
......
......@@ -50,7 +50,7 @@
/* Initialize an SCTP inqueue. */
void sctp_inq_init(struct sctp_inq *queue)
{
skb_queue_head_init(&queue->in);
INIT_LIST_HEAD(&queue->in_chunk_list);
queue->in_progress = NULL;
/* Create a task for delivering data. */
......@@ -62,11 +62,13 @@ void sctp_inq_init(struct sctp_inq *queue)
/* Release the memory associated with an SCTP inqueue. */
void sctp_inq_free(struct sctp_inq *queue)
{
struct sctp_chunk *chunk;
struct sctp_chunk *chunk, *tmp;
/* Empty the queue. */
while ((chunk = (struct sctp_chunk *) skb_dequeue(&queue->in)) != NULL)
list_for_each_entry_safe(chunk, tmp, &queue->in_chunk_list, list) {
list_del_init(&chunk->list);
sctp_chunk_free(chunk);
}
/* If there is a packet which is currently being worked on,
* free it as well.
......@@ -92,7 +94,7 @@ void sctp_inq_push(struct sctp_inq *q, struct sctp_chunk *packet)
* Eventually, we should clean up inqueue to not rely
* on the BH related data structures.
*/
skb_queue_tail(&(q->in), (struct sk_buff *) packet);
list_add_tail(&packet->list, &q->in_chunk_list);
q->immediate.func(q->immediate.data);
}
......@@ -131,12 +133,16 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue)
/* Do we need to take the next packet out of the queue to process? */
if (!chunk) {
struct list_head *entry;
/* Is the queue empty? */
if (skb_queue_empty(&queue->in))
if (list_empty(&queue->in_chunk_list))
return NULL;
entry = queue->in_chunk_list.next;
chunk = queue->in_progress =
(struct sctp_chunk *) skb_dequeue(&queue->in);
list_entry(entry, struct sctp_chunk, list);
list_del_init(entry);
/* This is the first chunk in the packet. */
chunk->singleton = 1;
......
......@@ -108,7 +108,7 @@ struct sctp_packet *sctp_packet_init(struct sctp_packet *packet,
packet->transport = transport;
packet->source_port = sport;
packet->destination_port = dport;
skb_queue_head_init(&packet->chunks);
INIT_LIST_HEAD(&packet->chunk_list);
if (asoc) {
struct sctp_sock *sp = sctp_sk(asoc->base.sk);
overhead = sp->pf->af->net_header_len;
......@@ -129,12 +129,14 @@ struct sctp_packet *sctp_packet_init(struct sctp_packet *packet,
/* Free a packet. */
void sctp_packet_free(struct sctp_packet *packet)
{
struct sctp_chunk *chunk;
struct sctp_chunk *chunk, *tmp;
SCTP_DEBUG_PRINTK("%s: packet:%p\n", __FUNCTION__, packet);
while ((chunk = (struct sctp_chunk *)__skb_dequeue(&packet->chunks)) != NULL)
list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) {
list_del_init(&chunk->list);
sctp_chunk_free(chunk);
}
if (packet->malloced)
kfree(packet);
......@@ -276,7 +278,7 @@ append:
packet->has_sack = 1;
/* It is OK to send this chunk. */
__skb_queue_tail(&packet->chunks, (struct sk_buff *)chunk);
list_add_tail(&chunk->list, &packet->chunk_list);
packet->size += chunk_len;
chunk->transport = packet->transport;
finish:
......@@ -295,7 +297,7 @@ int sctp_packet_transmit(struct sctp_packet *packet)
struct sctphdr *sh;
__u32 crc32;
struct sk_buff *nskb;
struct sctp_chunk *chunk;
struct sctp_chunk *chunk, *tmp;
struct sock *sk;
int err = 0;
int padding; /* How much padding do we need? */
......@@ -305,11 +307,11 @@ int sctp_packet_transmit(struct sctp_packet *packet)
SCTP_DEBUG_PRINTK("%s: packet:%p\n", __FUNCTION__, packet);
/* Do NOT generate a chunkless packet. */
chunk = (struct sctp_chunk *)skb_peek(&packet->chunks);
if (unlikely(!chunk))
if (list_empty(&packet->chunk_list))
return err;
/* Set up convenience variables... */
chunk = list_entry(packet->chunk_list.next, struct sctp_chunk, list);
sk = chunk->skb->sk;
/* Allocate the new skb. */
......@@ -370,7 +372,8 @@ int sctp_packet_transmit(struct sctp_packet *packet)
* [This whole comment explains WORD_ROUND() below.]
*/
SCTP_DEBUG_PRINTK("***sctp_transmit_packet***\n");
while ((chunk = (struct sctp_chunk *)__skb_dequeue(&packet->chunks)) != NULL) {
list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) {
list_del_init(&chunk->list);
if (sctp_chunk_is_data(chunk)) {
if (!chunk->has_tsn) {
......@@ -511,7 +514,8 @@ err:
* will get resent or dropped later.
*/
while ((chunk = (struct sctp_chunk *)__skb_dequeue(&packet->chunks)) != NULL) {
list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) {
list_del_init(&chunk->list);
if (!sctp_chunk_is_data(chunk))
sctp_chunk_free(chunk);
}
......
......@@ -75,7 +75,7 @@ static void sctp_generate_fwdtsn(struct sctp_outq *q, __u32 sack_ctsn);
static inline void sctp_outq_head_data(struct sctp_outq *q,
struct sctp_chunk *ch)
{
__skb_queue_head(&q->out, (struct sk_buff *)ch);
list_add(&ch->list, &q->out_chunk_list);
q->out_qlen += ch->skb->len;
return;
}
......@@ -83,17 +83,22 @@ static inline void sctp_outq_head_data(struct sctp_outq *q,
/* Take data from the front of the queue. */
static inline struct sctp_chunk *sctp_outq_dequeue_data(struct sctp_outq *q)
{
struct sctp_chunk *ch;
ch = (struct sctp_chunk *)__skb_dequeue(&q->out);
if (ch)
struct sctp_chunk *ch = NULL;
if (!list_empty(&q->out_chunk_list)) {
struct list_head *entry = q->out_chunk_list.next;
ch = list_entry(entry, struct sctp_chunk, list);
list_del_init(entry);
q->out_qlen -= ch->skb->len;
}
return ch;
}
/* Add data chunk to the end of the queue. */
static inline void sctp_outq_tail_data(struct sctp_outq *q,
struct sctp_chunk *ch)
{
__skb_queue_tail(&q->out, (struct sk_buff *)ch);
list_add_tail(&ch->list, &q->out_chunk_list);
q->out_qlen += ch->skb->len;
return;
}
......@@ -197,8 +202,8 @@ static inline int sctp_cacc_skip(struct sctp_transport *primary,
void sctp_outq_init(struct sctp_association *asoc, struct sctp_outq *q)
{
q->asoc = asoc;
skb_queue_head_init(&q->out);
skb_queue_head_init(&q->control);
INIT_LIST_HEAD(&q->out_chunk_list);
INIT_LIST_HEAD(&q->control_chunk_list);
INIT_LIST_HEAD(&q->retransmit);
INIT_LIST_HEAD(&q->sacked);
INIT_LIST_HEAD(&q->abandoned);
......@@ -217,7 +222,7 @@ void sctp_outq_teardown(struct sctp_outq *q)
{
struct sctp_transport *transport;
struct list_head *lchunk, *pos, *temp;
struct sctp_chunk *chunk;
struct sctp_chunk *chunk, *tmp;
/* Throw away unacknowledged chunks. */
list_for_each(pos, &q->asoc->peer.transport_addr_list) {
......@@ -269,8 +274,10 @@ void sctp_outq_teardown(struct sctp_outq *q)
q->error = 0;
/* Throw away any leftover control chunks. */
while ((chunk = (struct sctp_chunk *) skb_dequeue(&q->control)) != NULL)
list_for_each_entry_safe(chunk, tmp, &q->control_chunk_list, list) {
list_del_init(&chunk->list);
sctp_chunk_free(chunk);
}
}
/* Free the outqueue structure and any related pending chunks. */
......@@ -333,7 +340,7 @@ int sctp_outq_tail(struct sctp_outq *q, struct sctp_chunk *chunk)
break;
};
} else {
__skb_queue_tail(&q->control, (struct sk_buff *) chunk);
list_add_tail(&chunk->list, &q->control_chunk_list);
SCTP_INC_STATS(SCTP_MIB_OUTCTRLCHUNKS);
}
......@@ -650,10 +657,9 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
__u16 sport = asoc->base.bind_addr.port;
__u16 dport = asoc->peer.port;
__u32 vtag = asoc->peer.i.init_tag;
struct sk_buff_head *queue;
struct sctp_transport *transport = NULL;
struct sctp_transport *new_transport;
struct sctp_chunk *chunk;
struct sctp_chunk *chunk, *tmp;
sctp_xmit_t status;
int error = 0;
int start_timer = 0;
......@@ -675,8 +681,9 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
* ...
*/
queue = &q->control;
while ((chunk = (struct sctp_chunk *)skb_dequeue(queue)) != NULL) {
list_for_each_entry_safe(chunk, tmp, &q->control_chunk_list, list) {
list_del_init(&chunk->list);
/* Pick the right transport to use. */
new_transport = chunk->transport;
......@@ -814,8 +821,6 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
/* Finally, transmit new packets. */
start_timer = 0;
queue = &q->out;
while ((chunk = sctp_outq_dequeue_data(q)) != NULL) {
/* RFC 2960 6.5 Every DATA chunk MUST carry a valid
* stream identifier.
......@@ -1149,8 +1154,9 @@ int sctp_outq_sack(struct sctp_outq *q, struct sctp_sackhdr *sack)
/* See if all chunks are acked.
* Make sure the empty queue handler will get run later.
*/
q->empty = skb_queue_empty(&q->out) && skb_queue_empty(&q->control) &&
list_empty(&q->retransmit);
q->empty = (list_empty(&q->out_chunk_list) &&
list_empty(&q->control_chunk_list) &&
list_empty(&q->retransmit));
if (!q->empty)
goto finish;
......@@ -1679,9 +1685,9 @@ static void sctp_generate_fwdtsn(struct sctp_outq *q, __u32 ctsn)
if (TSN_lte(tsn, ctsn)) {
list_del_init(lchunk);
if (!chunk->tsn_gap_acked) {
chunk->transport->flight_size -=
sctp_data_size(chunk);
q->outstanding_bytes -= sctp_data_size(chunk);
chunk->transport->flight_size -=
sctp_data_size(chunk);
q->outstanding_bytes -= sctp_data_size(chunk);
}
sctp_chunk_free(chunk);
} else {
......@@ -1729,7 +1735,7 @@ static void sctp_generate_fwdtsn(struct sctp_outq *q, __u32 ctsn)
nskips, &ftsn_skip_arr[0]);
if (ftsn_chunk) {
__skb_queue_tail(&q->control, (struct sk_buff *)ftsn_chunk);
list_add_tail(&ftsn_chunk->list, &q->control_chunk_list);
SCTP_INC_STATS(SCTP_MIB_OUTCTRLCHUNKS);
}
}
......@@ -1003,6 +1003,7 @@ struct sctp_chunk *sctp_chunkify(struct sk_buff *skb,
SCTP_DEBUG_PRINTK("chunkifying skb %p w/o an sk\n", skb);
}
INIT_LIST_HEAD(&retval->list);
retval->skb = skb;
retval->asoc = (struct sctp_association *)asoc;
retval->resent = 0;
......@@ -1116,8 +1117,7 @@ static void sctp_chunk_destroy(struct sctp_chunk *chunk)
/* Possibly, free the chunk. */
void sctp_chunk_free(struct sctp_chunk *chunk)
{
/* Make sure that we are not on any list. */
skb_unlink((struct sk_buff *) chunk);
BUG_ON(!list_empty(&chunk->list));
list_del_init(&chunk->transmitted_list);
/* Release our reference on the message tracker. */
......@@ -2739,8 +2739,12 @@ int sctp_process_asconf_ack(struct sctp_association *asoc,
asoc->addip_last_asconf = NULL;
/* Send the next asconf chunk from the addip chunk queue. */
asconf = (struct sctp_chunk *)__skb_dequeue(&asoc->addip_chunks);
if (asconf) {
if (!list_empty(&asoc->addip_chunk_list)) {
struct list_head *entry = asoc->addip_chunk_list.next;
asconf = list_entry(entry, struct sctp_chunk, list);
list_del_init(entry);
/* Hold the chunk until an ASCONF_ACK is received. */
sctp_chunk_hold(asconf);
if (sctp_primitive_ASCONF(asoc, asconf))
......
......@@ -406,7 +406,7 @@ static int sctp_send_asconf(struct sctp_association *asoc,
* transmission.
*/
if (asoc->addip_last_asconf) {
__skb_queue_tail(&asoc->addip_chunks, (struct sk_buff *)chunk);
list_add_tail(&chunk->list, &asoc->addip_chunk_list);
goto out;
}
......
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