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authorFlorin Coras <fcoras@cisco.com>2020-11-24 08:41:17 -0800
committerFlorin Coras <florin.coras@gmail.com>2020-11-24 21:44:14 +0000
commitc95cfa218b214bd1c67dc165b4ed1fb7a224bdad (patch)
tree50face9e83e6bd47a36557c25e5bee96a67f542d /src/vnet
parent61559029dacaac95b410fcb39e93134ee4858591 (diff)
svm: support for multi-segment enqueues
Type: feature Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I06c7022a6afbb146b23cbd3a430497ec9e8be73d
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/session/application_interface.h24
-rw-r--r--src/vnet/session/session.c49
2 files changed, 50 insertions, 23 deletions
diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index 1f3e181953b..79c6f288e93 100644
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -615,35 +615,35 @@ app_send_dgram_raw (svm_fifo_t * f, app_session_transport_t * at,
svm_msg_q_t * vpp_evt_q, u8 * data, u32 len, u8 evt_type,
u8 do_evt, u8 noblock)
{
- u32 max_enqueue, actual_write;
session_dgram_hdr_t hdr;
int rv;
- max_enqueue = svm_fifo_max_enqueue_prod (f);
- if (max_enqueue < (sizeof (session_dgram_hdr_t) + len))
+ if (svm_fifo_max_enqueue_prod (f) < (sizeof (session_dgram_hdr_t) + len))
return 0;
- max_enqueue -= sizeof (session_dgram_hdr_t);
- actual_write = clib_min (len, max_enqueue);
- hdr.data_length = actual_write;
+ hdr.data_length = len;
hdr.data_offset = 0;
clib_memcpy_fast (&hdr.rmt_ip, &at->rmt_ip, sizeof (ip46_address_t));
hdr.is_ip4 = at->is_ip4;
hdr.rmt_port = at->rmt_port;
clib_memcpy_fast (&hdr.lcl_ip, &at->lcl_ip, sizeof (ip46_address_t));
hdr.lcl_port = at->lcl_port;
- rv = svm_fifo_enqueue (f, sizeof (hdr), (u8 *) & hdr);
- ASSERT (rv == sizeof (hdr));
- rv = svm_fifo_enqueue (f, actual_write, data);
+ /* *INDENT-OFF* */
+ svm_fifo_seg_t segs[2] = {{ (u8 *) &hdr, sizeof (hdr) }, { data, len }};
+ /* *INDENT-ON* */
+
+ rv = svm_fifo_enqueue_segments (f, segs, 2, 0 /* allow partial */ );
+ if (PREDICT_FALSE (rv < 0))
+ return 0;
+
if (do_evt)
{
- if (rv > 0 && svm_fifo_set_event (f))
+ if (svm_fifo_set_event (f))
app_send_io_evt_to_vpp (vpp_evt_q, f->master_session_index, evt_type,
noblock);
}
- ASSERT (rv);
- return rv;
+ return len;
}
always_inline int
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 3a468b4c286..1f248057745 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -516,22 +516,49 @@ session_enqueue_dgram_connection (session_t * s,
session_dgram_hdr_t * hdr,
vlib_buffer_t * b, u8 proto, u8 queue_event)
{
- int enqueued = 0, rv, in_order_off;
+ int rv;
ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo)
>= b->current_length + sizeof (*hdr));
- svm_fifo_enqueue (s->rx_fifo, sizeof (session_dgram_hdr_t), (u8 *) hdr);
- enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length,
- vlib_buffer_get_current (b));
- if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
+ if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_NEXT_PRESENT)))
{
- in_order_off = enqueued > b->current_length ? enqueued : 0;
- rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
- if (rv > 0)
- enqueued += rv;
+ /* *INDENT-OFF* */
+ svm_fifo_seg_t segs[2] = {
+ { (u8 *) hdr, sizeof (*hdr) },
+ { vlib_buffer_get_current (b), b->current_length }
+ };
+ /* *INDENT-ON* */
+
+ rv = svm_fifo_enqueue_segments (s->rx_fifo, segs, 2,
+ 0 /* allow_partial */ );
}
- if (queue_event)
+ else
+ {
+ vlib_main_t *vm = vlib_get_main ();
+ svm_fifo_seg_t *segs = 0, *seg;
+ vlib_buffer_t *it = b;
+ u32 n_segs = 1;
+
+ vec_add2 (segs, seg, 1);
+ seg->data = (u8 *) hdr;
+ seg->len = sizeof (*hdr);
+ while (it)
+ {
+ vec_add2 (segs, seg, 1);
+ seg->data = vlib_buffer_get_current (it);
+ seg->len = it->current_length;
+ n_segs++;
+ if (!(it->flags & VLIB_BUFFER_NEXT_PRESENT))
+ break;
+ it = vlib_get_buffer (vm, it->next_buffer);
+ }
+ rv = svm_fifo_enqueue_segments (s->rx_fifo, segs, n_segs,
+ 0 /* allow partial */ );
+ vec_free (segs);
+ }
+
+ if (queue_event && rv > 0)
{
/* Queue RX event on this fifo. Eventually these will need to be flushed
* by calling stream_server_flush_enqueue_events () */
@@ -546,7 +573,7 @@ session_enqueue_dgram_connection (session_t * s,
session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
}
- return enqueued;
+ return rv > 0 ? rv : 0;
}
int