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flow: add miniflow_push_uint8

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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@netronome.com>
Acked-by: Jarno Rajahalme <jarno@ovn.org>
This commit is contained in:
Simon Horman
2016-01-20 15:15:00 +09:00
parent 1af27e8a4e
commit 1dcf9ac7ee
1 changed files with 23 additions and 0 deletions
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23
lib/flow.c
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@@ -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))