aboutsummaryrefslogtreecommitdiffstats
path: root/extras
diff options
context:
space:
mode:
authorJakub Grajciar <grajciar.jakub@gmail.com>2017-09-18 11:21:40 +0200
committerDamjan Marion <dmarion.lists@gmail.com>2017-09-23 23:24:49 +0000
commitba3c4e88c102afd601fbac0e02de73a28a279a73 (patch)
tree87fc1d72c9de5a1d931d8da1c93436164f003143 /extras
parentdc33d4ccb3712ab313f9d471cde35ef208aa0e29 (diff)
libmemif: Jumbo frames data/buffer length fix
Change-Id: Icadf1c28b4ab712a210a8e037200ab29d6c53fe4 Signed-off-by: Jakub Grajciar <grajciar.jakub@gmail.com>
Diffstat (limited to 'extras')
-rw-r--r--extras/libmemif/dockerfile2
-rw-r--r--extras/libmemif/src/main.c276
2 files changed, 195 insertions, 83 deletions
diff --git a/extras/libmemif/dockerfile b/extras/libmemif/dockerfile
index 92b2d2a11e5..5475c6be3c7 100644
--- a/extras/libmemif/dockerfile
+++ b/extras/libmemif/dockerfile
@@ -6,7 +6,7 @@ RUN rm -rf /var/lib/apt/lists/*
RUN git clone https://github.com/JakubGrajciar/libmemif.git /libmemif
WORKDIR /libmemif
-RUN git checkout dev
+RUN git checkout master
RUN ./bootstrap
RUN ./configure
RUN make
diff --git a/extras/libmemif/src/main.c b/extras/libmemif/src/main.c
index 49bf50cb5e0..49427670b07 100644
--- a/extras/libmemif/src/main.c
+++ b/extras/libmemif/src/main.c
@@ -181,7 +181,7 @@ print_bytes (void *data, uint16_t len, uint8_t q)
}
printf ("\n\n");
}
-#endif /* MEMIF_DBG */
+#endif /* MEMIF_DBG_SHM */
int
memif_syscall_error_handler (int err_code)
@@ -512,8 +512,8 @@ memif_set_rx_mode (memif_conn_handle_t c, memif_rx_mode_t rx_mode,
if (conn == NULL)
return MEMIF_ERR_NOCONN;
uint8_t num =
- (conn->args.is_master) ? conn->run_args.num_s2m_rings : conn->
- run_args.num_m2s_rings;
+ (conn->args.is_master) ? conn->run_args.num_s2m_rings : conn->run_args.
+ num_m2s_rings;
if (qid >= num)
return MEMIF_ERR_QID;
@@ -842,20 +842,21 @@ memif_control_fd_handler (int fd, uint8_t events)
if (((memif_connection_t *) e->data_struct)->on_interrupt != NULL)
{
num =
- (((memif_connection_t *) e->data_struct)->
- args.is_master) ? ((memif_connection_t *) e->
- data_struct)->run_args.
- num_s2m_rings : ((memif_connection_t *) e->data_struct)->
- run_args.num_m2s_rings;
+ (((memif_connection_t *) e->data_struct)->args.
+ is_master) ? ((memif_connection_t *) e->data_struct)->
+ run_args.num_s2m_rings : ((memif_connection_t *) e->
+ data_struct)->run_args.
+ num_m2s_rings;
for (i = 0; i < num; i++)
{
- if (((memif_connection_t *) e->data_struct)->
- rx_queues[i].int_fd == fd)
+ if (((memif_connection_t *) e->data_struct)->rx_queues[i].
+ int_fd == fd)
{
- ((memif_connection_t *) e->data_struct)->
- on_interrupt ((void *) e->data_struct,
- ((memif_connection_t *) e->
- data_struct)->private_ctx, i);
+ ((memif_connection_t *) e->
+ data_struct)->on_interrupt ((void *) e->data_struct,
+ ((memif_connection_t *)
+ e->data_struct)->
+ private_ctx, i);
return MEMIF_ERR_SUCCESS;
}
}
@@ -882,24 +883,24 @@ memif_control_fd_handler (int fd, uint8_t events)
if (events & MEMIF_FD_EVENT_READ)
{
err =
- ((memif_connection_t *) e->data_struct)->
- read_fn (e->data_struct);
+ ((memif_connection_t *) e->data_struct)->read_fn (e->
+ data_struct);
if (err != MEMIF_ERR_SUCCESS)
return err;
}
if (events & MEMIF_FD_EVENT_WRITE)
{
err =
- ((memif_connection_t *) e->data_struct)->
- write_fn (e->data_struct);
+ ((memif_connection_t *) e->data_struct)->write_fn (e->
+ data_struct);
if (err != MEMIF_ERR_SUCCESS)
return err;
}
if (events & MEMIF_FD_EVENT_ERROR)
{
err =
- ((memif_connection_t *) e->data_struct)->
- error_fn (e->data_struct);
+ ((memif_connection_t *) e->data_struct)->error_fn (e->
+ data_struct);
if (err != MEMIF_ERR_SUCCESS)
return err;
}
@@ -993,8 +994,8 @@ memif_disconnect_internal (memif_connection_t * c)
if (c->tx_queues != NULL)
{
num =
- (c->args.is_master) ? c->run_args.num_m2s_rings : c->
- run_args.num_s2m_rings;
+ (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
+ num_s2m_rings;
for (i = 0; i < num; i++)
{
mq = &c->tx_queues[i];
@@ -1014,8 +1015,8 @@ memif_disconnect_internal (memif_connection_t * c)
if (c->rx_queues != NULL)
{
num =
- (c->args.is_master) ? c->run_args.num_s2m_rings : c->
- run_args.num_m2s_rings;
+ (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
+ num_m2s_rings;
for (i = 0; i < num; i++)
{
mq = &c->rx_queues[i];
@@ -1167,8 +1168,8 @@ memif_connect1 (memif_connection_t * c)
}
num =
- (c->args.is_master) ? c->run_args.num_m2s_rings : c->
- run_args.num_s2m_rings;
+ (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
+ num_s2m_rings;
for (i = 0; i < num; i++)
{
mq = &c->tx_queues[i];
@@ -1185,8 +1186,8 @@ memif_connect1 (memif_connection_t * c)
}
}
num =
- (c->args.is_master) ? c->run_args.num_s2m_rings : c->
- run_args.num_m2s_rings;
+ (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
+ num_m2s_rings;
for (i = 0; i < num; i++)
{
mq = &c->rx_queues[i];
@@ -1347,8 +1348,8 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
if (c->fd < 0)
return MEMIF_ERR_DISCONNECTED;
uint8_t num =
- (c->args.is_master) ? c->run_args.num_m2s_rings : c->
- run_args.num_s2m_rings;
+ (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
+ num_s2m_rings;
if (qid >= num)
return MEMIF_ERR_QID;
memif_queue_t *mq = &c->tx_queues[qid];
@@ -1377,7 +1378,7 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
{
while ((count > 2) && (ns > 2))
{
- s0 = (ring->head + mq->alloc_bufs + *count_out) & mask;
+ s0 = (ring->head + mq->alloc_bufs) & mask;
chain_buf0 = size / ring->desc[s0].buffer_length;
if (((size % ring->desc[s0].buffer_length) != 0) || (size == 0))
chain_buf0++;
@@ -1385,7 +1386,7 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
if (chain_buf0 > ns)
break;
- s1 = (ring->head + mq->alloc_bufs + *count_out + chain_buf0) & mask;
+ s1 = (ring->head + mq->alloc_bufs + chain_buf0) & mask;
chain_buf1 = size / ring->desc[s1].buffer_length;
if (((size % ring->desc[s1].buffer_length) != 0) || (size == 0))
chain_buf1++;
@@ -1398,6 +1399,8 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
b0->desc_index = s0;
b1->desc_index = s1;
+ ring->desc[s0].flags = 0;
+ ring->desc[s1].flags = 0;
b0->buffer_len = ring->desc[s0].buffer_length * chain_buf0;
b1->buffer_len = ring->desc[s1].buffer_length * chain_buf1;
/* TODO: support multiple regions -> ring descriptor contains region index */
@@ -1429,7 +1432,7 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
ns -= chain_buf0 + chain_buf1;
*count_out += 2;
}
- s0 = (ring->head + mq->alloc_bufs + *count_out) & mask;
+ s0 = (ring->head + mq->alloc_bufs) & mask;
b0 = (bufs + *count_out);
@@ -1441,6 +1444,7 @@ memif_buffer_alloc (memif_conn_handle_t conn, uint16_t qid,
break;
b0->desc_index = s0;
+ ring->desc[s0].flags = 0;
b0->buffer_len = ring->desc[s0].buffer_length * chain_buf0;
b0->data = c->regions->shm + ring->desc[s0].offset;
@@ -1481,8 +1485,8 @@ memif_buffer_free (memif_conn_handle_t conn, uint16_t qid,
if (c->fd < 0)
return MEMIF_ERR_DISCONNECTED;
uint8_t num =
- (c->args.is_master) ? c->run_args.num_s2m_rings : c->
- run_args.num_m2s_rings;
+ (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
+ num_m2s_rings;
if (qid >= num)
return MEMIF_ERR_QID;
libmemif_main_t *lm = &libmemif_main;
@@ -1513,7 +1517,6 @@ memif_buffer_free (memif_conn_handle_t conn, uint16_t qid,
if ((b1->buffer_len % ring->desc[b1->desc_index].buffer_length) !=
0)
chain_buf1++;
- tail = (b0->desc_index + chain_buf0) & mask;
tail = (b1->desc_index + chain_buf1) & mask;
b0->data = NULL;
b1->data = NULL;
@@ -1535,6 +1538,7 @@ memif_buffer_free (memif_conn_handle_t conn, uint16_t qid,
}
MEMIF_MEORY_BARRIER ();
ring->tail = tail;
+ DBG ("tail: %u", ring->tail);
return MEMIF_ERR_SUCCESS; /* 0 */
}
@@ -1549,8 +1553,8 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
if (c->fd < 0)
return MEMIF_ERR_DISCONNECTED;
uint8_t num =
- (c->args.is_master) ? c->run_args.num_m2s_rings : c->
- run_args.num_s2m_rings;
+ (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
+ num_s2m_rings;
if (qid >= num)
return MEMIF_ERR_QID;
memif_queue_t *mq = &c->tx_queues[qid];
@@ -1583,8 +1587,34 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
for (i = 0; i < memif_min (chain_buf0, chain_buf1); i++)
{
- ring->desc[(b0->desc_index + i) & mask].length = b0->data_len;
- ring->desc[(b1->desc_index + i) & mask].length = b1->data_len;
+ /* b0 */
+ if (b0->data_len >
+ ring->desc[(b0->desc_index + i) & mask].buffer_length)
+ {
+ b0->data_len -=
+ ring->desc[(b0->desc_index + i) & mask].length =
+ ring->desc[(b0->desc_index + i) & mask].buffer_length;
+ }
+ else
+ {
+ ring->desc[(b0->desc_index + i) & mask].length =
+ b0->data_len;
+ b0->data_len = 0;
+ }
+ /* b1 */
+ if (b1->data_len >
+ ring->desc[(b1->desc_index + i) & mask].buffer_length)
+ {
+ b1->data_len -=
+ ring->desc[(b1->desc_index + i) & mask].length =
+ ring->desc[(b1->desc_index + i) & mask].buffer_length;
+ }
+ else
+ {
+ ring->desc[(b1->desc_index + i) & mask].length =
+ b1->data_len;
+ b1->data_len = 0;
+ }
#ifdef MEMIF_DBG_SHM
print_bytes (b0->data +
ring->desc[(b0->desc_index +
@@ -1598,15 +1628,26 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
(chain_buf1 - 1),
ring->desc[(b1->desc_index +
i) & mask].buffer_length, DBG_TX_BUF);
-#endif
+#endif /* MEMIF_DBG_SHM */
}
if (chain_buf0 > chain_buf1)
{
for (; i < chain_buf0; i++)
{
- ring->desc[(b0->desc_index + i) & mask].length =
- b0->data_len;
+ if (b0->data_len >
+ ring->desc[(b0->desc_index + i) & mask].buffer_length)
+ {
+ b0->data_len -=
+ ring->desc[(b0->desc_index + i) & mask].length =
+ ring->desc[(b0->desc_index + i) & mask].buffer_length;
+ }
+ else
+ {
+ ring->desc[(b0->desc_index + i) & mask].length =
+ b0->data_len;
+ b0->data_len = 0;
+ }
#ifdef MEMIF_DBG_SHM
print_bytes (b0->data +
ring->desc[(b0->desc_index +
@@ -1615,14 +1656,26 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
ring->desc[(b0->desc_index +
i) & mask].buffer_length,
DBG_TX_BUF);
-#endif
+#endif /* MEMIF_DBG_SHM */
}
}
else
{
for (; i < chain_buf1; i++)
{
- ring->desc[b1->desc_index + i].length = b1->data_len;
+ if (b1->data_len >
+ ring->desc[(b1->desc_index + i) & mask].buffer_length)
+ {
+ b1->data_len -=
+ ring->desc[(b1->desc_index + i) & mask].length =
+ ring->desc[(b1->desc_index + i) & mask].buffer_length;
+ }
+ else
+ {
+ ring->desc[(b1->desc_index + i) & mask].length =
+ b1->data_len;
+ b1->data_len = 0;
+ }
#ifdef MEMIF_DBG_SHM
print_bytes (b1->data +
ring->desc[(b1->desc_index +
@@ -1631,44 +1684,62 @@ memif_tx_burst (memif_conn_handle_t conn, uint16_t qid,
ring->desc[(b1->desc_index +
i) & mask].buffer_length,
DBG_TX_BUF);
-#endif
+#endif /* MEMIF_DBG_SHM */
}
}
- head = (b0->desc_index + chain_buf0) & mask;
head = (b1->desc_index + chain_buf1) & mask;
b0->data = NULL;
- b0->data_len = 0;
+#ifdef MEMIF_DBG
+ if (b0->data_len != 0)
+ DBG ("invalid b0 data length!");
+#endif /* MEMIF_DBG */
b1->data = NULL;
- b1->data_len = 0;
+#ifdef MEMIF_DBG
+ if (b1->data_len != 0)
+ DBG ("invalid b1 data length!");
+#endif /* MEMIF_DBG */
count -= 2;
*tx += chain_buf0 + chain_buf1;
curr_buf += 2;
}
- b0 = (bufs + *tx);
+ b0 = (bufs + curr_buf);
chain_buf0 = b0->buffer_len / ring->desc[b0->desc_index].buffer_length;
if ((b0->buffer_len % ring->desc[b0->desc_index].buffer_length) != 0)
chain_buf0++;
for (i = 0; i < chain_buf0; i++)
{
- ring->desc[(b0->desc_index + i) & mask].length = b0->data_len;
+ if (b0->data_len >
+ ring->desc[(b0->desc_index + i) & mask].buffer_length)
+ {
+ b0->data_len -= ring->desc[(b0->desc_index + i) & mask].length =
+ ring->desc[(b0->desc_index + i) & mask].buffer_length;
+ }
+ else
+ {
+ ring->desc[(b0->desc_index + i) & mask].length = b0->data_len;
+ b0->data_len = 0;
+ }
#ifdef MEMIF_DBG_SHM
print_bytes (b0->data +
ring->desc[(b0->desc_index + i) & mask].buffer_length *
(chain_buf0 - 1),
ring->desc[(b0->desc_index + i) & mask].buffer_length,
DBG_TX_BUF);
-#endif
+#endif /* MEMIF_DBG_SHM */
}
head = (b0->desc_index + chain_buf0) & mask;
b0->data = NULL;
- b0->data_len = 0;
+#ifdef MEMIF_DBG
+ if (b0->data_len != 0)
+ DBG ("invalid b0 data length!");
+#endif /* MEMIF_DBG */
count--;
*tx += chain_buf0;
@@ -1703,8 +1774,8 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
if (c->fd < 0)
return MEMIF_ERR_DISCONNECTED;
uint8_t num =
- (c->args.is_master) ? c->run_args.num_s2m_rings : c->
- run_args.num_m2s_rings;
+ (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
+ num_m2s_rings;
if (qid >= num)
return MEMIF_ERR_QID;
memif_queue_t *mq = &c->rx_queues[qid];
@@ -1732,6 +1803,7 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
while (ns && count)
{
+ DBG ("ns: %u, count: %u", ns, count);
while ((ns > 2) && (count > 2))
{
b0 = (bufs + curr_buf);
@@ -1739,41 +1811,67 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
b0->desc_index = mq->last_head;
i = 0;
- do
+ b0->data_len = 0;
+ b0->buffer_len = 0;
+
+ b0->data = memif_get_buffer (conn, ring, mq->last_head);
+ b0->data_len += ring->desc[mq->last_head].length;
+ b0->buffer_len += ring->desc[mq->last_head].buffer_length;
+#ifdef MEMIF_DBG_SHM
+ print_bytes (b0->data +
+ ring->desc[b0->desc_index].buffer_length * i++,
+ ring->desc[b0->desc_index].buffer_length, DBG_TX_BUF);
+#endif /* MEMIF_DBG_SHM */
+ ns--;
+ *rx += 1;
+ while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT)
{
- b0->data = memif_get_buffer (conn, ring, mq->last_head);
- b0->data_len = ring->desc[mq->last_head].length;
- b0->buffer_len = ring->desc[mq->last_head].buffer_length;
+ ring->desc[mq->last_head].flags &= ~MEMIF_DESC_FLAG_NEXT;
+ mq->last_head = (mq->last_head + 1) & mask;
+ b0->data_len += ring->desc[mq->last_head].length;
+ b0->buffer_len += ring->desc[mq->last_head].buffer_length;
#ifdef MEMIF_DBG_SHM
print_bytes (b0->data +
ring->desc[b0->desc_index].buffer_length * i++,
ring->desc[b0->desc_index].buffer_length,
DBG_TX_BUF);
-#endif
- mq->last_head = (mq->last_head + 1) & mask;
+#endif /* MEMIF_DBG_SHM */
ns--;
*rx += 1;
}
- while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT);
+ mq->last_head = (mq->last_head + 1) & mask;
b1->desc_index = mq->last_head;
i = 0;
- do
+ b0->data_len = 0;
+ b0->buffer_len = 0;
+
+ b1->data = memif_get_buffer (conn, ring, mq->last_head);
+ b1->data_len += ring->desc[mq->last_head].length;
+ b1->buffer_len += ring->desc[mq->last_head].buffer_length;
+#ifdef MEMIF_DBG_SHM
+ print_bytes (b1->data +
+ ring->desc[b1->desc_index].buffer_length * i++,
+ ring->desc[b1->desc_index].buffer_length, DBG_TX_BUF);
+#endif /* MEMIF_DBG_SHM */
+ ns--;
+ *rx += 1;
+ while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT)
{
- b1->data = memif_get_buffer (conn, ring, mq->last_head);
- b1->data_len = ring->desc[mq->last_head].length;
- b1->buffer_len = ring->desc[mq->last_head].buffer_length;
+ ring->desc[mq->last_head].flags &= ~MEMIF_DESC_FLAG_NEXT;
+ mq->last_head = (mq->last_head + 1) & mask;
+ b1->data_len += ring->desc[mq->last_head].length;
+ b1->buffer_len += ring->desc[mq->last_head].buffer_length;
#ifdef MEMIF_DBG_SHM
print_bytes (b1->data +
ring->desc[b1->desc_index].buffer_length * i++,
ring->desc[b1->desc_index].buffer_length,
DBG_TX_BUF);
-#endif
- mq->last_head = (mq->last_head + 1) & mask;
+#endif /* MEMIF_DBG_SHM */
ns--;
*rx += 1;
}
- while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT);
+ mq->last_head = (mq->last_head + 1) & mask;
count -= 2;
curr_buf += 2;
@@ -1782,21 +1880,35 @@ memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
b0->desc_index = mq->last_head;
i = 0;
- do
+ b0->data_len = 0;
+ b0->buffer_len = 0;
+
+ b0->data = memif_get_buffer (conn, ring, mq->last_head);
+ b0->data_len += ring->desc[mq->last_head].length;
+ b0->buffer_len += ring->desc[mq->last_head].buffer_length;
+#ifdef MEMIF_DBG_SHM
+ print_bytes (b0->data +
+ ring->desc[b0->desc_index].buffer_length * i++,
+ ring->desc[b0->desc_index].buffer_length, DBG_TX_BUF);
+#endif /* MEMIF_DBG_SHM */
+ ns--;
+ *rx += 1;
+
+ while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT)
{
- b0->data = memif_get_buffer (conn, ring, mq->last_head);
- b0->data_len = ring->desc[mq->last_head].length;
- b0->buffer_len = ring->desc[mq->last_head].buffer_length;
+ ring->desc[mq->last_head].flags &= ~MEMIF_DESC_FLAG_NEXT;
+ mq->last_head = (mq->last_head + 1) & mask;
+ b0->data_len += ring->desc[mq->last_head].length;
+ b0->buffer_len += ring->desc[mq->last_head].buffer_length;
#ifdef MEMIF_DBG_SHM
print_bytes (b0->data +
ring->desc[b0->desc_index].buffer_length * i++,
ring->desc[b0->desc_index].buffer_length, DBG_TX_BUF);
-#endif
- mq->last_head = (mq->last_head + 1) & mask;
+#endif /* MEMIF_DBG_SHM */
ns--;
*rx += 1;
}
- while (ring->desc[mq->last_head].flags & MEMIF_DESC_FLAG_NEXT);
+ mq->last_head = (mq->last_head + 1) & mask;
count--;
curr_buf++;
@@ -1895,8 +2007,8 @@ memif_get_details (memif_conn_handle_t conn, memif_details_t * md,
err = MEMIF_ERR_NOBUF_DET;
md->rx_queues_num =
- (c->args.is_master) ? c->run_args.num_s2m_rings : c->
- run_args.num_m2s_rings;
+ (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
+ num_m2s_rings;
l1 = sizeof (memif_queue_details_t) * md->rx_queues_num;
if (l0 + l1 <= buflen)
@@ -1915,8 +2027,8 @@ memif_get_details (memif_conn_handle_t conn, memif_details_t * md,
}
md->tx_queues_num =
- (c->args.is_master) ? c->run_args.num_m2s_rings : c->
- run_args.num_s2m_rings;
+ (c->args.is_master) ? c->run_args.num_m2s_rings : c->run_args.
+ num_s2m_rings;
l1 = sizeof (memif_queue_details_t) * md->tx_queues_num;
if (l0 + l1 <= buflen)
@@ -1949,8 +2061,8 @@ memif_get_queue_efd (memif_conn_handle_t conn, uint16_t qid, int *efd)
if (c->fd < 0)
return MEMIF_ERR_DISCONNECTED;
uint8_t num =
- (c->args.is_master) ? c->run_args.num_s2m_rings : c->
- run_args.num_m2s_rings;
+ (c->args.is_master) ? c->run_args.num_s2m_rings : c->run_args.
+ num_m2s_rings;
if (qid >= num)
return MEMIF_ERR_QID;