diff mbox

linux-generic: packet: Add lazy parsing support

Message ID 1430362960-23440-1-git-send-email-bill.fischofer@linaro.org
State New
Headers show

Commit Message

Bill Fischofer April 30, 2015, 3:02 a.m. UTC
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>
---
 .../linux-generic/include/odp_packet_internal.h    | 72 +++++++++++---------
 platform/linux-generic/odp_packet.c                | 26 ++++++--
 platform/linux-generic/odp_packet_flags.c          | 76 ++++++++++++----------
 platform/linux-generic/odp_packet_io.c             |  2 +-
 platform/linux-generic/odp_packet_socket.c         |  6 +-
 5 files changed, 107 insertions(+), 75 deletions(-)
diff mbox

Patch

diff --git a/platform/linux-generic/include/odp_packet_internal.h b/platform/linux-generic/include/odp_packet_internal.h
index c3dcdd8..81f2d8e 100644
--- a/platform/linux-generic/include/odp_packet_internal.h
+++ b/platform/linux-generic/include/odp_packet_internal.h
@@ -31,37 +31,37 @@  extern "C" {
  */
 typedef union {
 	/* All input flags */
-	uint32_t all;
+	uint64_t all;
 
 	struct {
 		/* Bitfield flags for each protocol */
-		uint32_t l2:1;        /**< known L2 protocol present */
-		uint32_t l3:1;        /**< known L3 protocol present */
-		uint32_t l4:1;        /**< known L4 protocol present */
-
-		uint32_t eth:1;       /**< Ethernet */
-		uint32_t jumbo:1;     /**< Jumbo frame */
-		uint32_t vlan:1;      /**< VLAN hdr found */
-		uint32_t vlan_qinq:1; /**< Stacked VLAN found, QinQ */
-
-		uint32_t snap:1;      /**< SNAP */
-		uint32_t arp:1;       /**< ARP */
-
-		uint32_t ipv4:1;      /**< IPv4 */
-		uint32_t ipv6:1;      /**< IPv6 */
-		uint32_t ipfrag:1;    /**< IP fragment */
-		uint32_t ipopt:1;     /**< IP optional headers */
-		uint32_t ipsec:1;     /**< IPSec decryption may be needed */
-
-		uint32_t udp:1;       /**< UDP */
-		uint32_t tcp:1;       /**< TCP */
-		uint32_t tcpopt:1;    /**< TCP options present */
-		uint32_t sctp:1;      /**< SCTP */
-		uint32_t icmp:1;      /**< ICMP */
+		uint32_t l2:2;        /**< known L2 protocol present */
+		uint32_t l3:2;        /**< known L3 protocol present */
+		uint32_t l4:2;        /**< known L4 protocol present */
+
+		uint32_t eth:2;       /**< Ethernet */
+		uint32_t jumbo:2;     /**< Jumbo frame */
+		uint32_t vlan:2;      /**< VLAN hdr found */
+		uint32_t vlan_qinq:2; /**< Stacked VLAN found, QinQ */
+
+		uint32_t snap:2;      /**< SNAP */
+		uint32_t arp:2;       /**< ARP */
+
+		uint32_t ipv4:2;      /**< IPv4 */
+		uint32_t ipv6:2;      /**< IPv6 */
+		uint32_t ipfrag:2;    /**< IP fragment */
+		uint32_t ipopt:2;     /**< IP optional headers */
+		uint32_t ipsec:2;     /**< IPSec decryption may be needed */
+
+		uint32_t udp:2;       /**< UDP */
+		uint32_t tcp:2;       /**< TCP */
+		uint32_t tcpopt:2;    /**< TCP options present */
+		uint32_t sctp:2;      /**< SCTP */
+		uint32_t icmp:2;      /**< ICMP */
 	};
 } input_flags_t;
 
-_ODP_STATIC_ASSERT(sizeof(input_flags_t) == sizeof(uint32_t),
+_ODP_STATIC_ASSERT(sizeof(input_flags_t) == sizeof(uint64_t),
 		   "INPUT_FLAGS_SIZE_ERROR");
 
 /**
@@ -95,10 +95,10 @@  typedef union {
 
 	struct {
 		/* Bitfield flags for each output option */
-		uint32_t l3_chksum_set:1; /**< L3 chksum bit is valid */
-		uint32_t l3_chksum:1;     /**< L3 chksum override */
-		uint32_t l4_chksum_set:1; /**< L3 chksum bit is valid */
-		uint32_t l4_chksum:1;     /**< L4 chksum override  */
+		uint32_t l3_chksum_set:2; /**< L3 chksum bit is valid */
+		uint32_t l3_chksum:2;     /**< L3 chksum override */
+		uint32_t l4_chksum_set:2; /**< L3 chksum bit is valid */
+		uint32_t l4_chksum:2;     /**< L4 chksum override  */
 	};
 } output_flags_t;
 
@@ -248,6 +248,18 @@  static inline void packet_set_len(odp_packet_t pkt, uint32_t len)
 	odp_packet_hdr(pkt)->frame_len = len;
 }
 
+#define ODP_PACKET_OFFSET_UNPARSED (ODP_PACKET_OFFSET_INVALID - 1)
+
+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 = -1;
+	pkt_hdr->error_flags.all = -1;
+	pkt_hdr->l2_offset = ODP_PACKET_OFFSET_UNPARSED;
+	pkt_hdr->l3_offset = ODP_PACKET_OFFSET_UNPARSED;
+	pkt_hdr->l4_offset = ODP_PACKET_OFFSET_UNPARSED;
+}
+
 /* Forward declarations */
 int _odp_packet_copy_to_packet(odp_packet_t srcpkt, uint32_t srcoffset,
 			       odp_packet_t dstpkt, uint32_t dstoffset,
@@ -257,7 +269,7 @@  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_packet.c b/platform/linux-generic/odp_packet.c
index c5a3f7d..ac171cd 100644
--- a/platform/linux-generic/odp_packet.c
+++ b/platform/linux-generic/odp_packet.c
@@ -242,12 +242,17 @@  void odp_packet_user_u64_set(odp_packet_t pkt, uint64_t ctx)
 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->l2_offset == ODP_PACKET_OFFSET_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->l2_offset == ODP_PACKET_OFFSET_UNPARSED)
+		_odp_packet_parse(pkt_hdr);
+	return pkt_hdr->l2_offset;
 }
 
 int odp_packet_l2_offset_set(odp_packet_t pkt, uint32_t offset)
@@ -264,12 +269,17 @@  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->l3_offset == ODP_PACKET_OFFSET_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->l3_offset == ODP_PACKET_OFFSET_UNPARSED)
+		_odp_packet_parse(pkt_hdr);
+	return pkt_hdr->l3_offset;
 }
 
 int odp_packet_l3_offset_set(odp_packet_t pkt, uint32_t offset)
@@ -286,12 +296,17 @@  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->l4_offset == ODP_PACKET_OFFSET_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->l4_offset == ODP_PACKET_OFFSET_UNPARSED)
+		_odp_packet_parse(pkt_hdr);
+	return pkt_hdr->l4_offset;
 }
 
 int odp_packet_l4_offset_set(odp_packet_t pkt, uint32_t offset)
@@ -558,7 +573,7 @@  void odp_packet_print(odp_packet_t pkt)
 	len += snprintf(&str[len], n-len, "Packet ");
 	len += odp_buffer_snprint(&str[len], n-len, (odp_buffer_t) pkt);
 	len += snprintf(&str[len], n-len,
-			"  input_flags  0x%x\n", hdr->input_flags.all);
+			"  input_flags  0x%" PRIx64 "\n", hdr->input_flags.all);
 	len += snprintf(&str[len], n-len,
 			"  error_flags  0x%x\n", hdr->error_flags.all);
 	len += snprintf(&str[len], n-len,
@@ -790,9 +805,8 @@  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..04e37ba 100644
--- a/platform/linux-generic/odp_packet_flags.c
+++ b/platform/linux-generic/odp_packet_flags.c
@@ -7,182 +7,188 @@ 
 #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->x > 1)			       \
+		_odp_packet_parse(pkt_hdr);	       \
+	return pkt_hdr->x;			       \
+	} while (0)
 
 int odp_packet_has_error(odp_packet_t pkt)
 {
-	return (odp_packet_hdr(pkt)->error_flags.all != 0);
+	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;
+	odp_packet_hdr(pkt)->input_flags.l2 = val & 1;
 }
 
 void odp_packet_has_l3_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.l3 = val;
+	odp_packet_hdr(pkt)->input_flags.l3 = val & 1;
 }
 
 void odp_packet_has_l4_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.l4 = val;
+	odp_packet_hdr(pkt)->input_flags.l4 = val & 1;
 }
 
 void odp_packet_has_eth_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.eth = val;
+	odp_packet_hdr(pkt)->input_flags.eth = val & 1;
 }
 
 void odp_packet_has_jumbo_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.jumbo = val;
+	odp_packet_hdr(pkt)->input_flags.jumbo = val & 1;
 }
 
 void odp_packet_has_vlan_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.vlan = val;
+	odp_packet_hdr(pkt)->input_flags.vlan = val & 1;
 }
 
 void odp_packet_has_vlan_qinq_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.vlan_qinq = val;
+	odp_packet_hdr(pkt)->input_flags.vlan_qinq = val & 1;
 }
 
 void odp_packet_has_arp_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.arp = val;
+	odp_packet_hdr(pkt)->input_flags.arp = val & 1;
 }
 
 void odp_packet_has_ipv4_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.ipv4 = val;
+	odp_packet_hdr(pkt)->input_flags.ipv4 = val & 1;
 }
 
 void odp_packet_has_ipv6_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.ipv6 = val;
+	odp_packet_hdr(pkt)->input_flags.ipv6 = val & 1;
 }
 
 void odp_packet_has_ipfrag_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.ipfrag = val;
+	odp_packet_hdr(pkt)->input_flags.ipfrag = val & 1;
 }
 
 void odp_packet_has_ipopt_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.ipopt = val;
+	odp_packet_hdr(pkt)->input_flags.ipopt = val & 1;
 }
 
 void odp_packet_has_ipsec_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.ipsec = val;
+	odp_packet_hdr(pkt)->input_flags.ipsec = val & 1;
 }
 
 void odp_packet_has_udp_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.udp = val;
+	odp_packet_hdr(pkt)->input_flags.udp = val & 1;
 }
 
 void odp_packet_has_tcp_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.tcp = val;
+	odp_packet_hdr(pkt)->input_flags.tcp = val & 1;
 }
 
 void odp_packet_has_sctp_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.sctp = val;
+	odp_packet_hdr(pkt)->input_flags.sctp = val & 1;
 }
 
 void odp_packet_has_icmp_set(odp_packet_t pkt, int val)
 {
-	odp_packet_hdr(pkt)->input_flags.icmp = val;
+	odp_packet_hdr(pkt)->input_flags.icmp = val & 1;
 }
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++;