[ovs-dev] [PATCH v9 1/7] flow: add miniflow_push_uint8
Simon Horman
simon.horman at netronome.com
Wed Jan 20 06:15:00 UTC 2016
The motivation is to allow pushing single bytes in
a manner to that already used for 16, 32 and 64 bit integers.
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 | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/lib/flow.c b/lib/flow.c
index 5668d0c5899e..f09c32523899 100644
--- a/lib/flow.c
+++ b/lib/flow.c
@@ -199,6 +199,23 @@ BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
} \
}
+#define miniflow_push_uint8_(MF, OFS, VALUE) \
+{ \
+ MINIFLOW_ASSERT(MF.data < MF.end); \
+ \
+ if ((OFS) % 8 == 0) { \
+ miniflow_set_map(MF, OFS / 8); \
+ *(uint8_t *)MF.data = VALUE; \
+ } else if ((OFS) % 8 == 7) { \
+ miniflow_assert_in_map(MF, OFS / 8); \
+ *((uint8_t *)MF.data + 7) = VALUE; \
+ MF.data++; \
+ } else { \
+ miniflow_assert_in_map(MF, OFS / 8); \
+ *((uint8_t *)MF.data + ((OFS) % 8)) = VALUE; \
+ } \
+}
+
#define miniflow_pad_to_64_(MF, OFS) \
{ \
MINIFLOW_ASSERT((OFS) % 8 != 0); \
@@ -211,6 +228,9 @@ BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
#define miniflow_push_be16_(MF, OFS, VALUE) \
miniflow_push_uint16_(MF, OFS, (OVS_FORCE uint16_t)VALUE);
+#define miniflow_push_be8_(MF, OFS, VALUE) \
+ miniflow_push_uint8_(MF, OFS, (OVS_FORCE uint8_t)VALUE);
+
#define miniflow_set_maps(MF, OFS, N_WORDS) \
{ \
size_t ofs = (OFS); \
@@ -262,6 +282,9 @@ BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
#define miniflow_push_be16(MF, FIELD, VALUE) \
miniflow_push_be16_(MF, offsetof(struct flow, FIELD), VALUE)
+#define miniflow_push_uint8(MF, FIELD, VALUE) \
+ miniflow_push_uint8_(MF, offsetof(struct flow, FIELD), VALUE)
+
#define miniflow_pad_to_64(MF, FIELD) \
miniflow_pad_to_64_(MF, OFFSETOFEND(struct flow, FIELD))
--
2.1.4
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