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* [dpdk-dev] [PATCH] librte_lpm: define tbl entry reversely for big endian
@ 2015-03-04  6:34 xuelin.shi
  2015-03-04 10:48 ` Bruce Richardson
  2015-03-09 14:02 ` Bruce Richardson
  0 siblings, 2 replies; 11+ messages in thread
From: xuelin.shi @ 2015-03-04  6:34 UTC (permalink / raw)
  To: bruce.richardson; +Cc: dev

From: Xuelin Shi <xuelin.shi@freescale.com>

This module uses type conversion between struct and int.
Also truncation and comparison is used with this int.
It is not safe for different endian arch.

Add ifdef for big endian struct to fix this issue.

Signed-off-by: Xuelin Shi <xuelin.shi@freescale.com>
---
 lib/librte_lpm/rte_lpm.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/lib/librte_lpm/rte_lpm.h b/lib/librte_lpm/rte_lpm.h
index 1af150c..08a2859 100644
--- a/lib/librte_lpm/rte_lpm.h
+++ b/lib/librte_lpm/rte_lpm.h
@@ -96,6 +96,7 @@ extern "C" {
 /** Bitmask used to indicate successful lookup */
 #define RTE_LPM_LOOKUP_SUCCESS          0x0100
 
+#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
 /** @internal Tbl24 entry structure. */
 struct rte_lpm_tbl24_entry {
 	/* Stores Next hop or group index (i.e. gindex)into tbl8. */
@@ -117,6 +118,24 @@ struct rte_lpm_tbl8_entry {
 	uint8_t valid_group :1; /**< Group validation flag. */
 	uint8_t depth       :6; /**< Rule depth. */
 };
+#else
+struct rte_lpm_tbl24_entry {
+	uint8_t depth 	    :6;
+	uint8_t ext_entry   :1;
+	uint8_t valid	    :1;
+	union {
+		uint8_t tbl8_gindex;
+		uint8_t next_hop;
+	};
+};
+
+struct rte_lpm_tbl8_entry {
+	uint8_t depth 	    :6;
+	uint8_t valid_group :1;
+	uint8_t valid	    :1;
+	uint8_t next_hop;
+};
+#endif
 
 /** @internal Rule structure. */
 struct rte_lpm_rule {
-- 
1.9.1

^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2015-03-24  7:28 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-03-04  6:34 [dpdk-dev] [PATCH] librte_lpm: define tbl entry reversely for big endian xuelin.shi
2015-03-04 10:48 ` Bruce Richardson
2015-03-05  2:12   ` Xuelin Shi
2015-03-06 11:13     ` Bruce Richardson
2015-03-09  1:54       ` Xuelin Shi
2015-03-09  9:12         ` Mcnamara, John
2015-03-09  9:35           ` Xuelin Shi
2015-03-09 14:04           ` Thomas Monjalon
2015-03-09 14:02 ` Bruce Richardson
2015-03-23 14:03   ` Thomas Monjalon
2015-03-24  7:28     ` Xuelin Shi

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