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mbuf: check sanity of data and packet lengths

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Update rte_mbuf_sanity_check() to check sanity of data_len and pkt_len
fields. For segmented packets it is supposed that head's pkt_len field
should be the sum of all segments data_len values.

Signed-off-by: Ilya V. Matveychikov <matvejchikov@gmail.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
This commit is contained in:
Ilya V. Matveychikov 2017-12-10 00:39:18 +03:00 committed by Thomas Monjalon
parent fce71ed2d2
commit 4ba9f1f910
1 changed files with 15 additions and 8 deletions
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23
lib/librte_mbuf/rte_mbuf.c
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@ -202,8 +202,7 @@ rte_pktmbuf_pool_create(const char *name, unsigned n,
void
rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
{
const struct rte_mbuf *m_seg;
unsigned int nb_segs;
unsigned int nb_segs, pkt_len;
if (m == NULL)
rte_panic("mbuf is NULL\n");
@ -224,14 +223,22 @@ rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
if (is_header == 0)
return;
/* data_len is supposed to be not more than pkt_len */
if (m->data_len > m->pkt_len)
rte_panic("bad data_len\n");
nb_segs = m->nb_segs;
m_seg = m;
while (m_seg && nb_segs != 0) {
m_seg = m_seg->next;
nb_segs--;
}
if (nb_segs != 0)
pkt_len = m->pkt_len;
do {
nb_segs -= 1;
pkt_len -= m->data_len;
} while ((m = m->next) != NULL);
if (nb_segs)
rte_panic("bad nb_segs\n");
if (pkt_len)
rte_panic("bad pkt_len\n");
}
/* dump a mbuf on console */