[PATCHv6] linux-generic: packet: Add lazy parsing support

Lazy parsing defers parsing until the results are actually needed.
This allows applications that do their own parsing and never reference
ODP parse results to avoid the overhead of SW parsing.

Signed-off-by: Bill Fischofer <bill.fischofer@linaro.org>
---
Changes in v6:
- Added lazy parse hook in classifier since it references internals for perf

Changes in v5:
- Streamline implementation for odp-dpdk compatibility

Changes in v4:
- Rebase to avoid merge conflicts with commit db1f4e58

Changes in v3:
- Incorporate review comments from Maxim

Changes in v2;
- Corrected processing of odp_packet_has_error()

 .../linux-generic/include/odp_packet_internal.h    | 13 +++-
 platform/linux-generic/odp_classification.c        |  4 +
 platform/linux-generic/odp_packet.c                | 30 ++++++--
 platform/linux-generic/odp_packet_flags.c          | 86 +++++++++++++---------
 platform/linux-generic/odp_packet_io.c             |  2 +-
 platform/linux-generic/odp_packet_socket.c         |  6 +-
 6 files changed, 95 insertions(+), 46 deletions(-)

The changes seem to be OK, though I haven't ran the linux-generic unit 
tests on them:

Reviewed-by: Zoltan Kiss <zoltan.kiss@linaro.org>


On 13/05/15 13:38, Bill Fischofer wrote:
> Lazy parsing defers parsing until the results are actually needed.
> This allows applications that do their own parsing and never reference
> ODP parse results to avoid the overhead of SW parsing.
>
> Signed-off-by: Bill Fischofer <bill.fischofer@linaro.org>
> ---
> Changes in v6:
> - Added lazy parse hook in classifier since it references internals for perf
>
> Changes in v5:
> - Streamline implementation for odp-dpdk compatibility
>
> Changes in v4:
> - Rebase to avoid merge conflicts with commit db1f4e58
>
> Changes in v3:
> - Incorporate review comments from Maxim
>
> Changes in v2;
> - Corrected processing of odp_packet_has_error()
>
>   .../linux-generic/include/odp_packet_internal.h    | 13 +++-
>   platform/linux-generic/odp_classification.c        |  4 +
>   platform/linux-generic/odp_packet.c                | 30 ++++++--
>   platform/linux-generic/odp_packet_flags.c          | 86 +++++++++++++---------
>   platform/linux-generic/odp_packet_io.c             |  2 +-
>   platform/linux-generic/odp_packet_socket.c         |  6 +-
>   6 files changed, 95 insertions(+), 46 deletions(-)
>
> diff --git a/platform/linux-generic/include/odp_packet_internal.h b/platform/linux-generic/include/odp_packet_internal.h
> index 90dfe80..9890dc8 100644
> --- a/platform/linux-generic/include/odp_packet_internal.h
> +++ b/platform/linux-generic/include/odp_packet_internal.h
> @@ -34,7 +34,8 @@ typedef union {
>   	uint32_t all;
>
>   	struct {
> -		/* Bitfield flags for each protocol */
> +		uint32_t unparsed:1;  /**< Set to inticate parse needed */
> +
>   		uint32_t l2:1;        /**< known L2 protocol present */
>   		uint32_t l3:1;        /**< known L3 protocol present */
>   		uint32_t l4:1;        /**< known L4 protocol present */
> @@ -245,6 +246,14 @@ static inline void packet_set_len(odp_packet_t pkt, uint32_t len)
>   	odp_packet_hdr(pkt)->frame_len = len;
>   }
>
> +#define ODP_PACKET_UNPARSED ~0
> +
> +static inline void _odp_packet_reset_parse(odp_packet_t pkt)
> +{
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	pkt_hdr->input_flags.all = ODP_PACKET_UNPARSED;
> +}
> +
>   /* Forward declarations */
>   int _odp_packet_copy_to_packet(odp_packet_t srcpkt, uint32_t srcoffset,
>   			       odp_packet_t dstpkt, uint32_t dstoffset,
> @@ -254,7 +263,7 @@ void _odp_packet_copy_md_to_packet(odp_packet_t srcpkt, odp_packet_t dstpkt);
>
>   odp_packet_t _odp_packet_alloc(odp_pool_t pool_hdl);
>
> -int _odp_packet_parse(odp_packet_t pkt);
> +int _odp_packet_parse(odp_packet_hdr_t *pkt_hdr);
>
>   /* Convert a packet handle to a buffer handle */
>   odp_buffer_t _odp_packet_to_buffer(odp_packet_t pkt);
> diff --git a/platform/linux-generic/odp_classification.c b/platform/linux-generic/odp_classification.c
> index 0e46b1b..fdb544d 100644
> --- a/platform/linux-generic/odp_classification.c
> +++ b/platform/linux-generic/odp_classification.c
> @@ -823,6 +823,10 @@ cos_t *pktio_select_cos(pktio_entry_t *entry, uint8_t *pkt_addr,
>
>   	cls = &entry->s.cls;
>
> +	/* Check for lazy parse needed */
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
> +
>   	/* Return error cos for error packet */
>   	if (pkt_hdr->error_flags.all)
>   		return cls->error_cos;
> diff --git a/platform/linux-generic/odp_packet.c b/platform/linux-generic/odp_packet.c
> index 3ef0267..668ddda 100644
> --- a/platform/linux-generic/odp_packet.c
> +++ b/platform/linux-generic/odp_packet.c
> @@ -242,12 +242,17 @@ uint32_t odp_packet_user_area_size(odp_packet_t pkt)
>   void *odp_packet_l2_ptr(odp_packet_t pkt, uint32_t *len)
>   {
>   	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
>   	return packet_map(pkt_hdr, pkt_hdr->l2_offset, len);
>   }
>
>   uint32_t odp_packet_l2_offset(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->l2_offset;
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
> +	return pkt_hdr->l2_offset;
>   }
>
>   int odp_packet_l2_offset_set(odp_packet_t pkt, uint32_t offset)
> @@ -257,6 +262,8 @@ int odp_packet_l2_offset_set(odp_packet_t pkt, uint32_t offset)
>   	if (offset >= pkt_hdr->frame_len)
>   		return -1;
>
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
>   	pkt_hdr->l2_offset = offset;
>   	return 0;
>   }
> @@ -264,12 +271,17 @@ int odp_packet_l2_offset_set(odp_packet_t pkt, uint32_t offset)
>   void *odp_packet_l3_ptr(odp_packet_t pkt, uint32_t *len)
>   {
>   	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
>   	return packet_map(pkt_hdr, pkt_hdr->l3_offset, len);
>   }
>
>   uint32_t odp_packet_l3_offset(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->l3_offset;
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
> +	return pkt_hdr->l3_offset;
>   }
>
>   int odp_packet_l3_offset_set(odp_packet_t pkt, uint32_t offset)
> @@ -279,6 +291,8 @@ int odp_packet_l3_offset_set(odp_packet_t pkt, uint32_t offset)
>   	if (offset >= pkt_hdr->frame_len)
>   		return -1;
>
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
>   	pkt_hdr->l3_offset = offset;
>   	return 0;
>   }
> @@ -286,12 +300,17 @@ int odp_packet_l3_offset_set(odp_packet_t pkt, uint32_t offset)
>   void *odp_packet_l4_ptr(odp_packet_t pkt, uint32_t *len)
>   {
>   	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
>   	return packet_map(pkt_hdr, pkt_hdr->l4_offset, len);
>   }
>
>   uint32_t odp_packet_l4_offset(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->l4_offset;
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
> +	return pkt_hdr->l4_offset;
>   }
>
>   int odp_packet_l4_offset_set(odp_packet_t pkt, uint32_t offset)
> @@ -301,6 +320,8 @@ int odp_packet_l4_offset_set(odp_packet_t pkt, uint32_t offset)
>   	if (offset >= pkt_hdr->frame_len)
>   		return -1;
>
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
>   	pkt_hdr->l4_offset = offset;
>   	return 0;
>   }
> @@ -814,9 +835,8 @@ static inline void parse_udp(odp_packet_hdr_t *pkt_hdr,
>    * Simple packet parser
>    */
>
> -int _odp_packet_parse(odp_packet_t pkt)
> +int _odp_packet_parse(odp_packet_hdr_t *pkt_hdr)
>   {
> -	odp_packet_hdr_t *const pkt_hdr = odp_packet_hdr(pkt);
>   	odph_ethhdr_t *eth;
>   	odph_vlanhdr_t *vlan;
>   	uint16_t ethtype;
> diff --git a/platform/linux-generic/odp_packet_flags.c b/platform/linux-generic/odp_packet_flags.c
> index ab3d12f..4f680a1 100644
> --- a/platform/linux-generic/odp_packet_flags.c
> +++ b/platform/linux-generic/odp_packet_flags.c
> @@ -7,182 +7,198 @@
>   #include <odp/packet_flags.h>
>   #include <odp_packet_internal.h>
>
> +#define retflag(p, x) do {			       \
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(p); \
> +	if (pkt_hdr->input_flags.unparsed)	       \
> +		_odp_packet_parse(pkt_hdr);	       \
> +	return pkt_hdr->x;			       \
> +	} while (0)
> +
> +#define setflag(p, x, v) do {			       \
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(p); \
> +	if (pkt_hdr->input_flags.unparsed)	       \
> +		_odp_packet_parse(pkt_hdr);	       \
> +	pkt_hdr->x = v & 1;			       \
> +	} while (0)
>
>   int odp_packet_has_error(odp_packet_t pkt)
>   {
> -	return (odp_packet_hdr(pkt)->error_flags.all != 0);
> +	odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
> +	if (pkt_hdr->input_flags.unparsed)
> +		_odp_packet_parse(pkt_hdr);
> +	return odp_packet_hdr(pkt)->error_flags.all != 0;
>   }
>
>   /* Get Input Flags */
>
>   int odp_packet_has_l2(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.l2;
> +	retflag(pkt, input_flags.l2);
>   }
>
>   int odp_packet_has_l3(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.l3;
> +	retflag(pkt, input_flags.l3);
>   }
>
>   int odp_packet_has_l4(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.l4;
> +	retflag(pkt, input_flags.l4);
>   }
>
>   int odp_packet_has_eth(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.eth;
> +	retflag(pkt, input_flags.eth);
>   }
>
>   int odp_packet_has_jumbo(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.jumbo;
> +	retflag(pkt, input_flags.jumbo);
>   }
>
>   int odp_packet_has_vlan(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.vlan;
> +	retflag(pkt, input_flags.vlan);
>   }
>
>   int odp_packet_has_vlan_qinq(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.vlan_qinq;
> +	retflag(pkt, input_flags.vlan_qinq);
>   }
>
>   int odp_packet_has_arp(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.arp;
> +	retflag(pkt, input_flags.arp);
>   }
>
>   int odp_packet_has_ipv4(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.ipv4;
> +	retflag(pkt, input_flags.ipv4);
>   }
>
>   int odp_packet_has_ipv6(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.ipv6;
> +	retflag(pkt, input_flags.ipv6);
>   }
>
>   int odp_packet_has_ipfrag(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.ipfrag;
> +	retflag(pkt, input_flags.ipfrag);
>   }
>
>   int odp_packet_has_ipopt(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.ipopt;
> +	retflag(pkt, input_flags.ipopt);
>   }
>
>   int odp_packet_has_ipsec(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.ipsec;
> +	retflag(pkt, input_flags.ipsec);
>   }
>
>   int odp_packet_has_udp(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.udp;
> +	retflag(pkt, input_flags.udp);
>   }
>
>   int odp_packet_has_tcp(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.tcp;
> +	retflag(pkt, input_flags.tcp);
>   }
>
>   int odp_packet_has_sctp(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.sctp;
> +	retflag(pkt, input_flags.sctp);
>   }
>
>   int odp_packet_has_icmp(odp_packet_t pkt)
>   {
> -	return odp_packet_hdr(pkt)->input_flags.icmp;
> +	retflag(pkt, input_flags.icmp);
>   }
>
>   /* Set Input Flags */
>
>   void odp_packet_has_l2_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.l2 = val;
> +	setflag(pkt, input_flags.l2, val);
>   }
>
>   void odp_packet_has_l3_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.l3 = val;
> +	setflag(pkt, input_flags.l3, val);
>   }
>
>   void odp_packet_has_l4_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.l4 = val;
> +	setflag(pkt, input_flags.l4, val);
>   }
>
>   void odp_packet_has_eth_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.eth = val;
> +	setflag(pkt, input_flags.eth, val);
>   }
>
>   void odp_packet_has_jumbo_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.jumbo = val;
> +	setflag(pkt, input_flags.jumbo, val);
>   }
>
>   void odp_packet_has_vlan_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.vlan = val;
> +	setflag(pkt, input_flags.vlan, val);
>   }
>
>   void odp_packet_has_vlan_qinq_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.vlan_qinq = val;
> +	setflag(pkt, input_flags.vlan_qinq, val);
>   }
>
>   void odp_packet_has_arp_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.arp = val;
> +	setflag(pkt, input_flags.arp, val);
>   }
>
>   void odp_packet_has_ipv4_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.ipv4 = val;
> +	setflag(pkt, input_flags.ipv4, val);
>   }
>
>   void odp_packet_has_ipv6_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.ipv6 = val;
> +	setflag(pkt, input_flags.ipv6, val);
>   }
>
>   void odp_packet_has_ipfrag_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.ipfrag = val;
> +	setflag(pkt, input_flags.ipfrag, val);
>   }
>
>   void odp_packet_has_ipopt_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.ipopt = val;
> +	setflag(pkt, input_flags.ipopt, val);
>   }
>
>   void odp_packet_has_ipsec_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.ipsec = val;
> +	setflag(pkt, input_flags.ipsec, val);
>   }
>
>   void odp_packet_has_udp_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.udp = val;
> +	setflag(pkt, input_flags.udp, val);
>   }
>
>   void odp_packet_has_tcp_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.tcp = val;
> +	setflag(pkt, input_flags.tcp, val);
>   }
>
>   void odp_packet_has_sctp_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.sctp = val;
> +	setflag(pkt, input_flags.sctp, val);
>   }
>
>   void odp_packet_has_icmp_set(odp_packet_t pkt, int val)
>   {
> -	odp_packet_hdr(pkt)->input_flags.icmp = val;
> +	setflag(pkt, input_flags.icmp, val);
>   }
> diff --git a/platform/linux-generic/odp_packet_io.c b/platform/linux-generic/odp_packet_io.c
> index f16685d..5ae24b9 100644
> --- a/platform/linux-generic/odp_packet_io.c
> +++ b/platform/linux-generic/odp_packet_io.c
> @@ -378,7 +378,7 @@ static int deq_loopback(pktio_entry_t *pktio_entry, odp_packet_t pkts[],
>
>   	for (i = 0; i < nbr; ++i) {
>   		pkts[i] = _odp_packet_from_buffer(odp_hdr_to_buf(hdr_tbl[i]));
> -		_odp_packet_parse(pkts[i]);
> +		_odp_packet_reset_parse(pkts[i]);
>   	}
>
>   	return nbr;
> diff --git a/platform/linux-generic/odp_packet_socket.c b/platform/linux-generic/odp_packet_socket.c
> index 2802c43..9272146 100644
> --- a/platform/linux-generic/odp_packet_socket.c
> +++ b/platform/linux-generic/odp_packet_socket.c
> @@ -251,7 +251,7 @@ int recv_pkt_sock_basic(pkt_sock_t *const pkt_sock,
>
>   		/* Parse and set packet header data */
>   		odp_packet_pull_tail(pkt, pkt_sock->max_frame_len - recv_bytes);
> -		_odp_packet_parse(pkt);
> +		_odp_packet_reset_parse(pkt);
>
>   		pkt_table[nb_rx] = pkt;
>   		pkt = ODP_PACKET_INVALID;
> @@ -360,7 +360,7 @@ int recv_pkt_sock_mmsg(pkt_sock_t *const pkt_sock,
>   		odp_packet_pull_tail(pkt_table[i],
>   				     pkt_sock->max_frame_len -
>   				     msgvec[i].msg_len);
> -		_odp_packet_parse(pkt_table[i]);
> +		_odp_packet_reset_parse(pkt_table[i]);
>
>   		pkt_table[nb_rx] = pkt_table[i];
>   		nb_rx++;
> @@ -519,7 +519,7 @@ static inline unsigned pkt_mmap_v2_rx(int sock, struct ring *ring,
>   			mmap_rx_user_ready(ppd.raw);
>
>   			/* Parse and set packet header data */
> -			_odp_packet_parse(pkt_table[i]);
> +			_odp_packet_reset_parse(pkt_table[i]);
>
>   			frame_num = next_frame_num;
>   			i++;
>

Merged,
Maxim.

On 05/14/2015 14:27, Zoltan Kiss wrote:
> The changes seem to be OK, though I haven't ran the linux-generic unit 
> tests on them:
>
> Reviewed-by: Zoltan Kiss <zoltan.kiss@linaro.org>
>
>
> On 13/05/15 13:38, Bill Fischofer wrote:
>> Lazy parsing defers parsing until the results are actually needed.
>> This allows applications that do their own parsing and never reference
>> ODP parse results to avoid the overhead of SW parsing.
>>
>> Signed-off-by: Bill Fischofer <bill.fischofer@linaro.org>
>> ---
>> Changes in v6:
>> - Added lazy parse hook in classifier since it references internals 
>> for perf
>>
>> Changes in v5:
>> - Streamline implementation for odp-dpdk compatibility
>>
>> Changes in v4:
>> - Rebase to avoid merge conflicts with commit db1f4e58
>>
>> Changes in v3:
>> - Incorporate review comments from Maxim
>>
>> Changes in v2;
>> - Corrected processing of odp_packet_has_error()
>>
>>   .../linux-generic/include/odp_packet_internal.h    | 13 +++-
>>   platform/linux-generic/odp_classification.c        |  4 +
>>   platform/linux-generic/odp_packet.c                | 30 ++++++--
>>   platform/linux-generic/odp_packet_flags.c          | 86 
>> +++++++++++++---------
>>   platform/linux-generic/odp_packet_io.c             |  2 +-
>>   platform/linux-generic/odp_packet_socket.c         |  6 +-
>>   6 files changed, 95 insertions(+), 46 deletions(-)
>>
>> diff --git a/platform/linux-generic/include/odp_packet_internal.h 
>> b/platform/linux-generic/include/odp_packet_internal.h
>> index 90dfe80..9890dc8 100644
>> --- a/platform/linux-generic/include/odp_packet_internal.h
>> +++ b/platform/linux-generic/include/odp_packet_internal.h
>> @@ -34,7 +34,8 @@ typedef union {
>>       uint32_t all;
>>
>>       struct {
>> -        /* Bitfield flags for each protocol */
>> +        uint32_t unparsed:1;  /**< Set to inticate parse needed */
>> +
>>           uint32_t l2:1;        /**< known L2 protocol present */
>>           uint32_t l3:1;        /**< known L3 protocol present */
>>           uint32_t l4:1;        /**< known L4 protocol present */
>> @@ -245,6 +246,14 @@ static inline void packet_set_len(odp_packet_t 
>> pkt, uint32_t len)
>>       odp_packet_hdr(pkt)->frame_len = len;
>>   }
>>
>> +#define ODP_PACKET_UNPARSED ~0
>> +
>> +static inline void _odp_packet_reset_parse(odp_packet_t pkt)
>> +{
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    pkt_hdr->input_flags.all = ODP_PACKET_UNPARSED;
>> +}
>> +
>>   /* Forward declarations */
>>   int _odp_packet_copy_to_packet(odp_packet_t srcpkt, uint32_t 
>> srcoffset,
>>                      odp_packet_t dstpkt, uint32_t dstoffset,
>> @@ -254,7 +263,7 @@ void _odp_packet_copy_md_to_packet(odp_packet_t 
>> srcpkt, odp_packet_t dstpkt);
>>
>>   odp_packet_t _odp_packet_alloc(odp_pool_t pool_hdl);
>>
>> -int _odp_packet_parse(odp_packet_t pkt);
>> +int _odp_packet_parse(odp_packet_hdr_t *pkt_hdr);
>>
>>   /* Convert a packet handle to a buffer handle */
>>   odp_buffer_t _odp_packet_to_buffer(odp_packet_t pkt);
>> diff --git a/platform/linux-generic/odp_classification.c 
>> b/platform/linux-generic/odp_classification.c
>> index 0e46b1b..fdb544d 100644
>> --- a/platform/linux-generic/odp_classification.c
>> +++ b/platform/linux-generic/odp_classification.c
>> @@ -823,6 +823,10 @@ cos_t *pktio_select_cos(pktio_entry_t *entry, 
>> uint8_t *pkt_addr,
>>
>>       cls = &entry->s.cls;
>>
>> +    /* Check for lazy parse needed */
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>> +
>>       /* Return error cos for error packet */
>>       if (pkt_hdr->error_flags.all)
>>           return cls->error_cos;
>> diff --git a/platform/linux-generic/odp_packet.c 
>> b/platform/linux-generic/odp_packet.c
>> index 3ef0267..668ddda 100644
>> --- a/platform/linux-generic/odp_packet.c
>> +++ b/platform/linux-generic/odp_packet.c
>> @@ -242,12 +242,17 @@ uint32_t odp_packet_user_area_size(odp_packet_t 
>> pkt)
>>   void *odp_packet_l2_ptr(odp_packet_t pkt, uint32_t *len)
>>   {
>>       odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>>       return packet_map(pkt_hdr, pkt_hdr->l2_offset, len);
>>   }
>>
>>   uint32_t odp_packet_l2_offset(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->l2_offset;
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>> +    return pkt_hdr->l2_offset;
>>   }
>>
>>   int odp_packet_l2_offset_set(odp_packet_t pkt, uint32_t offset)
>> @@ -257,6 +262,8 @@ int odp_packet_l2_offset_set(odp_packet_t pkt, 
>> uint32_t offset)
>>       if (offset >= pkt_hdr->frame_len)
>>           return -1;
>>
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>>       pkt_hdr->l2_offset = offset;
>>       return 0;
>>   }
>> @@ -264,12 +271,17 @@ int odp_packet_l2_offset_set(odp_packet_t pkt, 
>> uint32_t offset)
>>   void *odp_packet_l3_ptr(odp_packet_t pkt, uint32_t *len)
>>   {
>>       odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>>       return packet_map(pkt_hdr, pkt_hdr->l3_offset, len);
>>   }
>>
>>   uint32_t odp_packet_l3_offset(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->l3_offset;
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>> +    return pkt_hdr->l3_offset;
>>   }
>>
>>   int odp_packet_l3_offset_set(odp_packet_t pkt, uint32_t offset)
>> @@ -279,6 +291,8 @@ int odp_packet_l3_offset_set(odp_packet_t pkt, 
>> uint32_t offset)
>>       if (offset >= pkt_hdr->frame_len)
>>           return -1;
>>
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>>       pkt_hdr->l3_offset = offset;
>>       return 0;
>>   }
>> @@ -286,12 +300,17 @@ int odp_packet_l3_offset_set(odp_packet_t pkt, 
>> uint32_t offset)
>>   void *odp_packet_l4_ptr(odp_packet_t pkt, uint32_t *len)
>>   {
>>       odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>>       return packet_map(pkt_hdr, pkt_hdr->l4_offset, len);
>>   }
>>
>>   uint32_t odp_packet_l4_offset(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->l4_offset;
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>> +    return pkt_hdr->l4_offset;
>>   }
>>
>>   int odp_packet_l4_offset_set(odp_packet_t pkt, uint32_t offset)
>> @@ -301,6 +320,8 @@ int odp_packet_l4_offset_set(odp_packet_t pkt, 
>> uint32_t offset)
>>       if (offset >= pkt_hdr->frame_len)
>>           return -1;
>>
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>>       pkt_hdr->l4_offset = offset;
>>       return 0;
>>   }
>> @@ -814,9 +835,8 @@ static inline void parse_udp(odp_packet_hdr_t 
>> *pkt_hdr,
>>    * Simple packet parser
>>    */
>>
>> -int _odp_packet_parse(odp_packet_t pkt)
>> +int _odp_packet_parse(odp_packet_hdr_t *pkt_hdr)
>>   {
>> -    odp_packet_hdr_t *const pkt_hdr = odp_packet_hdr(pkt);
>>       odph_ethhdr_t *eth;
>>       odph_vlanhdr_t *vlan;
>>       uint16_t ethtype;
>> diff --git a/platform/linux-generic/odp_packet_flags.c 
>> b/platform/linux-generic/odp_packet_flags.c
>> index ab3d12f..4f680a1 100644
>> --- a/platform/linux-generic/odp_packet_flags.c
>> +++ b/platform/linux-generic/odp_packet_flags.c
>> @@ -7,182 +7,198 @@
>>   #include <odp/packet_flags.h>
>>   #include <odp_packet_internal.h>
>>
>> +#define retflag(p, x) do {                   \
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(p); \
>> +    if (pkt_hdr->input_flags.unparsed)           \
>> +        _odp_packet_parse(pkt_hdr);           \
>> +    return pkt_hdr->x;                   \
>> +    } while (0)
>> +
>> +#define setflag(p, x, v) do {                   \
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(p); \
>> +    if (pkt_hdr->input_flags.unparsed)           \
>> +        _odp_packet_parse(pkt_hdr);           \
>> +    pkt_hdr->x = v & 1;                   \
>> +    } while (0)
>>
>>   int odp_packet_has_error(odp_packet_t pkt)
>>   {
>> -    return (odp_packet_hdr(pkt)->error_flags.all != 0);
>> +    odp_packet_hdr_t *pkt_hdr = odp_packet_hdr(pkt);
>> +    if (pkt_hdr->input_flags.unparsed)
>> +        _odp_packet_parse(pkt_hdr);
>> +    return odp_packet_hdr(pkt)->error_flags.all != 0;
>>   }
>>
>>   /* Get Input Flags */
>>
>>   int odp_packet_has_l2(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.l2;
>> +    retflag(pkt, input_flags.l2);
>>   }
>>
>>   int odp_packet_has_l3(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.l3;
>> +    retflag(pkt, input_flags.l3);
>>   }
>>
>>   int odp_packet_has_l4(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.l4;
>> +    retflag(pkt, input_flags.l4);
>>   }
>>
>>   int odp_packet_has_eth(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.eth;
>> +    retflag(pkt, input_flags.eth);
>>   }
>>
>>   int odp_packet_has_jumbo(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.jumbo;
>> +    retflag(pkt, input_flags.jumbo);
>>   }
>>
>>   int odp_packet_has_vlan(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.vlan;
>> +    retflag(pkt, input_flags.vlan);
>>   }
>>
>>   int odp_packet_has_vlan_qinq(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.vlan_qinq;
>> +    retflag(pkt, input_flags.vlan_qinq);
>>   }
>>
>>   int odp_packet_has_arp(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.arp;
>> +    retflag(pkt, input_flags.arp);
>>   }
>>
>>   int odp_packet_has_ipv4(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.ipv4;
>> +    retflag(pkt, input_flags.ipv4);
>>   }
>>
>>   int odp_packet_has_ipv6(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.ipv6;
>> +    retflag(pkt, input_flags.ipv6);
>>   }
>>
>>   int odp_packet_has_ipfrag(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.ipfrag;
>> +    retflag(pkt, input_flags.ipfrag);
>>   }
>>
>>   int odp_packet_has_ipopt(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.ipopt;
>> +    retflag(pkt, input_flags.ipopt);
>>   }
>>
>>   int odp_packet_has_ipsec(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.ipsec;
>> +    retflag(pkt, input_flags.ipsec);
>>   }
>>
>>   int odp_packet_has_udp(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.udp;
>> +    retflag(pkt, input_flags.udp);
>>   }
>>
>>   int odp_packet_has_tcp(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.tcp;
>> +    retflag(pkt, input_flags.tcp);
>>   }
>>
>>   int odp_packet_has_sctp(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.sctp;
>> +    retflag(pkt, input_flags.sctp);
>>   }
>>
>>   int odp_packet_has_icmp(odp_packet_t pkt)
>>   {
>> -    return odp_packet_hdr(pkt)->input_flags.icmp;
>> +    retflag(pkt, input_flags.icmp);
>>   }
>>
>>   /* Set Input Flags */
>>
>>   void odp_packet_has_l2_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.l2 = val;
>> +    setflag(pkt, input_flags.l2, val);
>>   }
>>
>>   void odp_packet_has_l3_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.l3 = val;
>> +    setflag(pkt, input_flags.l3, val);
>>   }
>>
>>   void odp_packet_has_l4_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.l4 = val;
>> +    setflag(pkt, input_flags.l4, val);
>>   }
>>
>>   void odp_packet_has_eth_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.eth = val;
>> +    setflag(pkt, input_flags.eth, val);
>>   }
>>
>>   void odp_packet_has_jumbo_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.jumbo = val;
>> +    setflag(pkt, input_flags.jumbo, val);
>>   }
>>
>>   void odp_packet_has_vlan_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.vlan = val;
>> +    setflag(pkt, input_flags.vlan, val);
>>   }
>>
>>   void odp_packet_has_vlan_qinq_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.vlan_qinq = val;
>> +    setflag(pkt, input_flags.vlan_qinq, val);
>>   }
>>
>>   void odp_packet_has_arp_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.arp = val;
>> +    setflag(pkt, input_flags.arp, val);
>>   }
>>
>>   void odp_packet_has_ipv4_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.ipv4 = val;
>> +    setflag(pkt, input_flags.ipv4, val);
>>   }
>>
>>   void odp_packet_has_ipv6_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.ipv6 = val;
>> +    setflag(pkt, input_flags.ipv6, val);
>>   }
>>
>>   void odp_packet_has_ipfrag_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.ipfrag = val;
>> +    setflag(pkt, input_flags.ipfrag, val);
>>   }
>>
>>   void odp_packet_has_ipopt_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.ipopt = val;
>> +    setflag(pkt, input_flags.ipopt, val);
>>   }
>>
>>   void odp_packet_has_ipsec_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.ipsec = val;
>> +    setflag(pkt, input_flags.ipsec, val);
>>   }
>>
>>   void odp_packet_has_udp_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.udp = val;
>> +    setflag(pkt, input_flags.udp, val);
>>   }
>>
>>   void odp_packet_has_tcp_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.tcp = val;
>> +    setflag(pkt, input_flags.tcp, val);
>>   }
>>
>>   void odp_packet_has_sctp_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.sctp = val;
>> +    setflag(pkt, input_flags.sctp, val);
>>   }
>>
>>   void odp_packet_has_icmp_set(odp_packet_t pkt, int val)
>>   {
>> -    odp_packet_hdr(pkt)->input_flags.icmp = val;
>> +    setflag(pkt, input_flags.icmp, val);
>>   }
>> diff --git a/platform/linux-generic/odp_packet_io.c 
>> b/platform/linux-generic/odp_packet_io.c
>> index f16685d..5ae24b9 100644
>> --- a/platform/linux-generic/odp_packet_io.c
>> +++ b/platform/linux-generic/odp_packet_io.c
>> @@ -378,7 +378,7 @@ static int deq_loopback(pktio_entry_t 
>> *pktio_entry, odp_packet_t pkts[],
>>
>>       for (i = 0; i < nbr; ++i) {
>>           pkts[i] = _odp_packet_from_buffer(odp_hdr_to_buf(hdr_tbl[i]));
>> -        _odp_packet_parse(pkts[i]);
>> +        _odp_packet_reset_parse(pkts[i]);
>>       }
>>
>>       return nbr;
>> diff --git a/platform/linux-generic/odp_packet_socket.c 
>> b/platform/linux-generic/odp_packet_socket.c
>> index 2802c43..9272146 100644
>> --- a/platform/linux-generic/odp_packet_socket.c
>> +++ b/platform/linux-generic/odp_packet_socket.c
>> @@ -251,7 +251,7 @@ int recv_pkt_sock_basic(pkt_sock_t *const pkt_sock,
>>
>>           /* Parse and set packet header data */
>>           odp_packet_pull_tail(pkt, pkt_sock->max_frame_len - 
>> recv_bytes);
>> -        _odp_packet_parse(pkt);
>> +        _odp_packet_reset_parse(pkt);
>>
>>           pkt_table[nb_rx] = pkt;
>>           pkt = ODP_PACKET_INVALID;
>> @@ -360,7 +360,7 @@ int recv_pkt_sock_mmsg(pkt_sock_t *const pkt_sock,
>>           odp_packet_pull_tail(pkt_table[i],
>>                        pkt_sock->max_frame_len -
>>                        msgvec[i].msg_len);
>> -        _odp_packet_parse(pkt_table[i]);
>> +        _odp_packet_reset_parse(pkt_table[i]);
>>
>>           pkt_table[nb_rx] = pkt_table[i];
>>           nb_rx++;
>> @@ -519,7 +519,7 @@ static inline unsigned pkt_mmap_v2_rx(int sock, 
>> struct ring *ring,
>>               mmap_rx_user_ready(ppd.raw);
>>
>>               /* Parse and set packet header data */
>> -            _odp_packet_parse(pkt_table[i]);
>> +            _odp_packet_reset_parse(pkt_table[i]);
>>
>>               frame_num = next_frame_num;
>>               i++;
>>
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