[ovs-dev] [PATCH v9 2/7] flow: add miniflow_pad_from_64
Simon Horman
simon.horman at netronome.com
Wed Jan 20 06:15:01 UTC 2016
Provide leading padding to allow pushing a value to a miniflow where
the value is not aligned to 64 bytes and no value has already been
pushed to the same word.
This will be used by a follow-up patch to allow layer 3 packet - that is
packets without an ethernet header - to be represented in flows.
Signed-off-by: Simon Horman <simon.horman at netronome.com>
---
v9
* New patch
---
lib/flow.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/lib/flow.c b/lib/flow.c
index f09c32523899..2a7116b675da 100644
--- a/lib/flow.c
+++ b/lib/flow.c
@@ -225,6 +225,16 @@ BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
MF.data++; \
}
+#define miniflow_pad_from_64_(MF, OFS) \
+{ \
+ MINIFLOW_ASSERT(MF.data < MF.end); \
+ \
+ MINIFLOW_ASSERT((OFS) % 8 != 0); \
+ miniflow_set_map(MF, OFS / 8); \
+ \
+ memset((uint8_t *)MF.data, 0, (OFS) % 8); \
+}
+
#define miniflow_push_be16_(MF, OFS, VALUE) \
miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE);
@@ -288,6 +298,9 @@ BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
#define miniflow_pad_to_64(MF, FIELD) \
miniflow_pad_to_64_(MF, OFFSETOFEND(struct flow, FIELD))
+#define miniflow_pad_from_64(MF, FIELD) \
+ miniflow_pad_from_64_(MF, offsetof(struct flow, FIELD))
+
#define miniflow_push_words(MF, FIELD, VALUEP, N_WORDS) \
miniflow_push_words_(MF, offsetof(struct flow, FIELD), VALUEP, N_WORDS)
--
2.1.4
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