As announced in the deprecation note, the field seqn is removed to give
more space to the dynamic fields.
This is how the mbuf layout looks like (pahole-style):
word type name byte size
0 void * buf_addr; /* 0 + 8 */
1 rte_iova_t buf_iova /* 8 + 8 */
/* --- RTE_MARKER64 rearm_data; */
2 uint16_t data_off; /* 16 + 2 */
uint16_t refcnt; /* 18 + 2 */
uint16_t nb_segs; /* 20 + 2 */
uint16_t port; /* 22 + 2 */
3 uint64_t ol_flags; /* 24 + 8 */
/* --- RTE_MARKER rx_descriptor_fields1; */
4 uint32_t union packet_type; /* 32 + 4 */
uint32_t pkt_len; /* 36 + 4 */
5 uint16_t data_len; /* 40 + 2 */
uint16_t vlan_tci; /* 42 + 2 */
5.5 uint64_t union hash; /* 44 + 8 */
6.5 uint16_t vlan_tci_outer; /* 52 + 2 */
uint16_t buf_len; /* 54 + 2 */
7 uint64_t timestamp; /* 56 + 8 */
/* --- RTE_MARKER cacheline1; */
8 struct rte_mempool * pool; /* 64 + 8 */
9 struct rte_mbuf * next; /* 72 + 8 */
10 uint64_t union tx_offload; /* 80 + 8 */
11 struct rte_mbuf_ext_shared_info * shinfo; /* 88 + 8 */
12 uint16_t priv_size; /* 96 + 2 */
uint16_t timesync; /* 98 + 2 */
12.5 uint32_t dynfield1[7]; /* 100 + 28 */
16 /* --- END 128 */
Signed-off-by: David Marchand <david.march...@redhat.com>
---
doc/guides/rel_notes/deprecation.rst | 1 -
doc/guides/rel_notes/release_20_11.rst | 3 +++
lib/librte_mbuf/rte_mbuf_core.h | 15 ++++++---------
3 files changed, 9 insertions(+), 10 deletions(-)
diff --git a/doc/guides/rel_notes/deprecation.rst
b/doc/guides/rel_notes/deprecation.rst
index 0f6f1df12a..fe3fd3956c 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -87,7 +87,6 @@ Deprecation Notices
The following static fields will be moved as dynamic:
- ``timestamp``
- - ``seqn``
As a consequence, the layout of the ``struct rte_mbuf`` will be re-arranged,
avoiding impact on vectorized implementation of the driver datapaths,
diff --git a/doc/guides/rel_notes/release_20_11.rst
b/doc/guides/rel_notes/release_20_11.rst
index 3d7edbfdbb..c0a9fc96aa 100644
--- a/doc/guides/rel_notes/release_20_11.rst
+++ b/doc/guides/rel_notes/release_20_11.rst
@@ -429,6 +429,9 @@ API Changes
* mbuf: Removed the unioned fields ``userdata`` and ``udata64``
from the structure ``rte_mbuf``. It is replaced with dynamic fields.
+* mbuf: Removed the field ``seqn`` from the structure ``rte_mbuf``.
+ It is replaced with dynamic fields.
+
* pci: Removed the ``rte_kernel_driver`` enum defined in rte_dev.h and
replaced with a private enum in the PCI subsystem.
diff --git a/lib/librte_mbuf/rte_mbuf_core.h b/lib/librte_mbuf/rte_mbuf_core.h
index a65eaaf692..3fb5abda3c 100644
--- a/lib/librte_mbuf/rte_mbuf_core.h
+++ b/lib/librte_mbuf/rte_mbuf_core.h
@@ -640,6 +640,11 @@ struct rte_mbuf {
};
};
+ /** Shared data for external buffer attached to mbuf. See
+ * rte_pktmbuf_attach_extbuf().
+ */
+ struct rte_mbuf_ext_shared_info *shinfo;
+
/** Size of the application private data. In case of an indirect
* mbuf, it stores the direct mbuf private data size.
*/
@@ -648,15 +653,7 @@ struct rte_mbuf {
/** Timesync flags for use with IEEE1588. */
uint16_t timesync;
- /** Sequence number. See also rte_reorder_insert(). */
- uint32_t seqn;
-
- /** Shared data for external buffer attached to mbuf. See
- * rte_pktmbuf_attach_extbuf().
- */
- struct rte_mbuf_ext_shared_info *shinfo;
-
- uint64_t dynfield1[3]; /**< Reserved for dynamic fields. */
+ uint32_t dynfield1[7]; /**< Reserved for dynamic fields. */
} __rte_cache_aligned;
/**
--
2.23.0
