From a18e79cd3cce35dd6f7c61f323100833e5ed9db9 Mon Sep 17 00:00:00 2001 From: =?utf8?q?J=C3=B6rg=20Thalheim?= Date: Thu, 26 Dec 2019 13:54:10 +0100 Subject: [PATCH] mbuf: improve API doc for attaching external buffer MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Enhance API documentation of rte_pktmbuf_attach_extbuf() to explain that the attached mbuf is initialized with length = 0. Link: https://bugs.dpdk.org/show_bug.cgi?id=362 Signed-off-by: Jörg Thalheim Signed-off-by: Olivier Matz --- lib/librte_mbuf/rte_mbuf.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index 219b110b76..2d4bda2512 100644 --- a/lib/librte_mbuf/rte_mbuf.h +++ b/lib/librte_mbuf/rte_mbuf.h @@ -924,10 +924,14 @@ rte_pktmbuf_ext_shinfo_init_helper(void *buf_addr, uint16_t *buf_len, * provided via shinfo. This callback function will be called once all the * mbufs are detached from the buffer (refcnt becomes zero). * - * The headroom for the attaching mbuf will be set to zero and this can be - * properly adjusted after attachment. For example, ``rte_pktmbuf_adj()`` + * The headroom length of the attaching mbuf will be set to zero and this + * can be properly adjusted after attachment. For example, ``rte_pktmbuf_adj()`` * or ``rte_pktmbuf_reset_headroom()`` might be used. * + * Similarly, the packet length is initialized to 0. If the buffer contains + * data, the user has to adjust ``data_len`` and the ``pkt_len`` field of + * the mbuf accordingly. + * * More mbufs can be attached to the same external buffer by * ``rte_pktmbuf_attach()`` once the external buffer has been attached by * this API. -- 2.20.1