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Fix the handling of Explicit EOR mode.

Browse Source 
While there, appropriately handle the overhead depending on
the usage of DATA or I-DATA chunks. Take the overhead only
into account, when required.

Joint work with rrs@
MFC after:	1 week
This commit is contained in:
Michael Tuexen 2017-07-15 19:54:03 +00:00
parent 4d7709ddf6
commit d32ed2c735
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=321034
2 changed files with 38 additions and 56 deletions
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89
sys/netinet/sctp_output.c
View File

@ -6250,11 +6250,7 @@ sctp_get_frag_point(struct sctp_tcb *stcb,
} else {
ovh = SCTP_MIN_V4_OVERHEAD;
}
if (stcb->asoc.idata_supported) {
ovh += sizeof(struct sctp_idata_chunk);
} else {
ovh += sizeof(struct sctp_data_chunk);
}
ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
siz = asoc->smallest_mtu - ovh;
else
@ -6759,7 +6755,7 @@ sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
}
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
(stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
@ -7459,11 +7455,7 @@ sctp_move_to_outqueue(struct sctp_tcb *stcb,
} else {
atomic_subtract_int(&sp->length, to_move);
}
if (stcb->asoc.idata_supported == 0) {
leading = sizeof(struct sctp_data_chunk);
} else {
leading = sizeof(struct sctp_idata_chunk);
}
leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
if (M_LEADINGSPACE(chk->data) < leading) {
/* Not enough room for a chunk header, get some */
struct mbuf *m;
@ -7505,11 +7497,7 @@ sctp_move_to_outqueue(struct sctp_tcb *stcb,
M_ALIGN(chk->data, 4);
}
}
if (stcb->asoc.idata_supported == 0) {
SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
} else {
SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_idata_chunk), M_NOWAIT);
}
SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
if (chk->data == NULL) {
/* HELP, TSNH since we assured it would not above? */
#ifdef INVARIANTS
@ -7522,13 +7510,8 @@ sctp_move_to_outqueue(struct sctp_tcb *stcb,
to_move = 0;
goto out_of;
}
if (stcb->asoc.idata_supported == 0) {
sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
chk->book_size = chk->send_size = (uint16_t)(to_move + sizeof(struct sctp_data_chunk));
} else {
sctp_snd_sb_alloc(stcb, sizeof(struct sctp_idata_chunk));
chk->book_size = chk->send_size = (uint16_t)(to_move + sizeof(struct sctp_idata_chunk));
}
sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
chk->book_size_scale = 0;
chk->sent = SCTP_DATAGRAM_UNSENT;
@ -7728,11 +7711,7 @@ sctp_fill_outqueue(struct sctp_tcb *stcb,
break;
}
/* Need an allowance for the data chunk header too */
if (stcb->asoc.idata_supported == 0) {
space_left -= sizeof(struct sctp_data_chunk);
} else {
space_left -= sizeof(struct sctp_idata_chunk);
}
space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
/* must make even word boundary */
space_left &= 0xfffffffc;
@ -7749,18 +7728,10 @@ sctp_fill_outqueue(struct sctp_tcb *stcb,
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
total_moved += moved;
space_left -= moved;
if (stcb->asoc.idata_supported == 0) {
if (space_left >= sizeof(struct sctp_data_chunk)) {
space_left -= sizeof(struct sctp_data_chunk);
} else {
space_left = 0;
}
if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
} else {
if (space_left >= sizeof(struct sctp_idata_chunk)) {
space_left -= sizeof(struct sctp_idata_chunk);
} else {
space_left = 0;
}
space_left = 0;
}
space_left &= 0xfffffffc;
}
@ -10209,8 +10180,7 @@ sctp_chunk_output(struct sctp_inpcb *inp,
* and we have data in flight we stop, except if we
* are handling a fragmented user message.
*/
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
(stcb->asoc.total_flight > 0)) {
/* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
@ -12448,7 +12418,7 @@ sctp_copy_it_in(struct sctp_tcb *stcb,
sp->sender_all_done = 0;
sp->some_taken = 0;
sp->put_last_out = 0;
resv_in_first = sizeof(struct sctp_data_chunk);
resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
sp->data = sp->tail_mbuf = NULL;
if (sp->length == 0) {
*error = 0;
@ -12865,12 +12835,19 @@ sctp_lower_sosend(struct socket *so,
}
/* would we block? */
if (non_blocking) {
uint32_t amount;
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (user_marks_eor == 0) {
amount = sndlen;
} else {
amount = 1;
}
if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
(stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
if (sndlen > SCTP_SB_LIMIT_SND(so))
@ -13036,7 +13013,7 @@ sctp_lower_sosend(struct socket *so,
goto out_unlocked;
}
/* Calculate the maximum we can send */
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
if (non_blocking) {
/* we already checked for non-blocking above. */
@ -13093,7 +13070,7 @@ sctp_lower_sosend(struct socket *so,
((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
/* No room right now ! */
SOCKBUF_LOCK(&so->so_snd);
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
@ -13129,7 +13106,7 @@ sctp_lower_sosend(struct socket *so,
SOCKBUF_UNLOCK(&so->so_snd);
goto out_unlocked;
}
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
}
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
@ -13222,8 +13199,9 @@ sctp_lower_sosend(struct socket *so,
/* How much room do we have? */
struct mbuf *new_tail, *mm;
if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
else
max_len = 0;
@ -13299,8 +13277,8 @@ sctp_lower_sosend(struct socket *so,
hold_tcblock = 1;
}
sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
else
max_len = 0;
@ -13341,8 +13319,7 @@ sctp_lower_sosend(struct socket *so,
}
asoc->ifp_had_enobuf = 0;
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
(stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
@ -13416,7 +13393,8 @@ sctp_lower_sosend(struct socket *so,
* size we KNOW we will get to sleep safely with the
* wakeup flag in place.
*/
if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
@ -13613,8 +13591,7 @@ sctp_lower_sosend(struct socket *so,
}
asoc->ifp_had_enobuf = 0;
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
(stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&

5
sys/netinet/sctp_output.h
View File

@ -135,6 +135,11 @@ void sctp_fix_ecn_echo(struct sctp_association *);
void sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net);
#define SCTP_DATA_CHUNK_OVERHEAD(stcb) ((stcb)->asoc.idata_supported ? \
sizeof(struct sctp_idata_chunk) : \
sizeof(struct sctp_data_chunk))
int
sctp_output(struct sctp_inpcb *, struct mbuf *, struct sockaddr *,
struct mbuf *, struct thread *, int);