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fix use after free issue in mbuf free

Two kinds of mbuf are used in f-stack: freebsd mbuf and dpdk mbuf.

freebsd mbufs are metadata used in freebsd stack, and their data
pointers (m_data) point to

fix use after free issue in mbuf free

Two kinds of mbuf are used in f-stack: freebsd mbuf and dpdk mbuf.

freebsd mbufs are metadata used in freebsd stack, and their data
pointers (m_data) point to dpdk mbuf's data (buf_addr). And they have
their own chain, like this:

bsd_mbuf1 -> bsd_mbuf2 -> bsd_mbuf3
\ \ \
dpdk_mbuf1 -> dpdk_mbuf2 -> dpdk_mbuf3

Considering the map relationship,

- m_freem() is corresponding to rte_pktmbuf_free(), is to free the whole
chain of mbufs.
- m_free() is corresponding to rte_pktmbuf_free_seg(), is to free the
specified mbuf segment.

The current implementation in f-stack uses rte_pktmbuf_free() for
m_free(). This leads to mbufs, which are still in use, be freed
unexpectedly. For example, if the bsd_mbuf1 is trimed into zero length,
bsd will invoke m_free() to free the specified segment, however, the
whole mbuf chain is freed by calling rte_pktmbuf_free().

#0 rte_pktmbuf_free (m=0x22006fb480)
#1 in ff_dpdk_pktmbuf_free (m=0x22006fb480)
#2 in ff_mbuf_ext_free (m=0x7ffff7f82800, arg1=0x22006fb480, arg2=0x0)
#3 in mb_free_ext (m=0x7ffff7f82800)
#4 in m_free (m=0x7ffff7f82800)
#5 in sbcompress (sb=, m=0x7ffff7f82800, n=)
#6 in sbappendstream_locked (sb=, m=0x7ffff7f82800, flags=0)

The fix is straightforward. Use the correct API for segment free.

Reported-by: Yong-Hao Zou <[email protected]>
Signed-off-by: Jianfeng Tan <[email protected]>

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set freebsd mbuf vlan information when the vlan_strip is enable && get ether_type error when the vlan_strip is disabled

set freebsd mbuf vlan information when the vlan_strip is enable && get ether_type error when the vlan_strip is disabled

not use mcopy when transmit from bsd to dpdk

not use mcopy when transmit from bsd to dpdk

Fix ff_rss_check function bug.

1.Close #22.
2.Configure the HW indirection table when initializing port.
3.Use several LSBs of the rss hash result according to reta_size when
calculating queue index.

Support RX/TX offload according to HW's capability

RX: VLAN strip, CRC strip, IP/TCP/UDP checksum.
TX: IP/TCP/UDP checksum, TSO.

Note that TSO has a problem: when enable TSO,
F-Stack is much slower

Support RX/TX offload according to HW's capability

RX: VLAN strip, CRC strip, IP/TCP/UDP checksum.
TX: IP/TCP/UDP checksum, TSO.

Note that TSO has a problem: when enable TSO,
F-Stack is much slower(Temporarily not resolved).
So TSO is disabled by default.
Edit config.ini to enable it.

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